Sounding reference signal resource determination for physical uplink shared channel utilizing configured grants

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may identify a first physical uplink shared channel (PUSCH) transmission that occurred most recently in time relative to a second sounding reference signal (SRS) transmission prior to the transmission of one or more PUSCH communications. The one or more PUSCH communications may correspond to a configured grant. The UE may use one or more SRS resources associated with the first SRS transmission to send one or more PUSCH communications. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to international patent application numbered PCT / CN2019 / 081872, filed on April 9, 2019, and entitled “SOUNDING REFERENCE SIGNAL RESOURCE DETERMINATION FOR PHYSICAL UPLINK SHAREDCHANNEL WITH CONFIGURED GRANT”, which is expressly incorporated herein by reference. Technical Field

[0003]

[0004] Various aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques and apparatus for sounding reference signal resource determination for a Physical Uplink Shared Channel (PUSCH) utilizing a configured grant. Background Art

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

[0005] A wireless communication network may include multiple base stations (BSs) that are capable of supporting communications for multiple user equipment (UEs). User equipment (UEs) may communicate with a base station (BS) via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a BS to a UE, while an uplink (or reverse link) refers to a communication link from a UE to a BS. As further described in detail herein, a BS may be referred to as a Node B, gNB, access point (AP), wireless head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, and the like.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a city-wide, national-wide, regional-wide, and even global scale. New Radio (NR), also known as 5G, is a set of enhancements to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL) Better integration, and supporting beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation. However, with the continued increase in demand for mobile broadband access, there is a need to further improve LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0007] In some aspects, a method for wireless communications performed by a user equipment (UE) may include identifying a first physical uplink shared channel (PUSCH) transmission that occurred most recently in time relative to a second sounding reference signal (SRS) transmission prior to the transmission of one or more SRS communications, wherein the one or more PUSCH communications correspond to a configured grant; and sending the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0008] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmit the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0009] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to identify a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmit the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0010] In some aspects, an apparatus for wireless communication may include means for identifying a first SRS transmission that occurs most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and means for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0011] In some aspects, a method for wireless communications performed by a UE may include identifying a first SRS transmission, which occurs prior to receiving activation downlink control information (DCI) and sending one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant; using one or more first SRS resources associated with the first SRS transmission to send the one or more first PUSCH communications; identifying a second SRS transmission, which occurs most recently in time relative to one or more third SRS transmissions after receiving the activation DCI and prior to sending one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to the configured grant; and sending one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission.

[0012] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to identify a first SRS transmission that occurs prior to receiving an activation DCI and transmitting one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant; transmit the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission; identify a second SRS transmission that occurs most recently in time relative to one or more third SRS transmissions after receiving the activation DCI and prior to transmitting one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to a configured grant; and transmit the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission.

[0013] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to identify a first SRS transmission that occurs prior to receiving an activation DCI and sending one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant; send the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission; identify a second SRS transmission that occurs most recently in time relative to one or more third SRS transmissions after receiving the activation DCI and prior to sending one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to a configured grant; and send the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission.

[0014] In some aspects, an apparatus for wireless communication may include a unit for identifying a first SRS transmission, which occurs prior to receipt of an activation DCI and transmission of one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant; a unit for sending the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission; a unit for identifying a second SRS transmission, which occurs most recently in time relative to one or more third SRS transmissions after receipt of the activation DCI and prior to transmission of one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to the configured grant; and a unit for sending one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission.

[0015] In some aspects, a method for wireless communications performed by a UE may include identifying a first SRS transmission that occurs closest in time to a second SRS transmission and at least a certain number of symbols before the transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and sending the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0016] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: identify a first SRS transmission that is closest in time to a second SRS transmission prior to transmission of one or more PUSCH communications and occurs at least a certain number of symbols prior to transmission of the one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmit the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0017] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to identify a first SRS transmission that occurs: most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications, and at least a certain number of symbols prior to transmission of the one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmit the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0018] In some aspects, an apparatus for wireless communication may include a unit for identifying a first SRS transmission that occurs closest in time to a second SRS transmission and at least a certain number of symbols before the transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and a unit for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission.

[0019] Various aspects herein generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and processing systems, as fully described herein with reference to and as illustrated by the accompanying drawings and description.

[0020] In order to better understand the specific embodiments below, the features and technical advantages of the examples according to the present disclosure have been generally summarized to a considerable extent above. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for the same purpose of performing the present disclosure. Such equivalent constructions do not deviate from the scope of protection of the attached claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (about their organization and method of operation), and the associated advantages will be better understood according to the following description. The various figures in the accompanying drawings are provided for illustration and description purposes and are not intended to limit the boundaries of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to enable a detailed understanding of the features described above of the present disclosure, a more specific description of what has been briefly summarized above may be given with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of the present disclosure, as the description admits of other equally valid aspects, and therefore should not be considered to limit the scope of protection thereof. The same reference numerals in different drawings may identify the same or similar elements.

[0022] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0023] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to various aspects of the present disclosure.

[0024] Figure 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network according to various aspects of the present disclosure.

[0025] Figure 3B is a block diagram conceptually illustrating an exemplary synchronous communication hierarchy in a wireless communication network in accordance with various aspects of the present disclosure.

[0026] Figure 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix in accordance with various aspects of the present disclosure.

[0027] Figure 5-Figure 7 is a diagram illustrating an example of sounding reference signal (SRS) resource determination for a physical uplink shared channel (PUSCH) utilizing a configured grant in accordance with various aspects of the present disclosure.

[0028] Figure 8-Figure 10 is a schematic diagram illustrating an exemplary process performed, for example, by a user equipment (UE) according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0029] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in a variety of different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure will become thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the protection scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, the device can be implemented or the method can be practiced using any number of aspects set forth herein. In addition, the protection scope of the present disclosure is intended to cover such a device or method, which can be implemented by using other structures, functions, or structures and functions of various aspects of the present disclosure set forth herein, or structures and functions of various aspects of the present disclosure set forth herein that are different from those set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0030] Several aspects of telecommunication systems are now presented with reference to various devices and techniques. These devices and techniques will be described in the detailed description below and depicted in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0031] It should be noted that although various aspects are described herein using terminology generally associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations, such as 5G and beyond, including NR technology.

[0032] Figure 11 is a schematic diagram showing a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network (such as a 5G or NR network). The wireless network 100 may include multiple BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE), and a BS may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), and the like. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0033] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB," "base station," "NR BS," "gNB," "TRP," "AP," "Node B," "5G NB," and "cell" may be used interchangeably herein.

[0034] In some aspects, the cells are not necessarily stationary, and the geographic area of ​​the cells can move according to the location of the mobile BS. In some aspects, the BSs can be interconnected with each other and / or 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, virtual networks, etc.) using any suitable transport network.

[0035] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in FIG. 1 , a relay station 110 d may communicate with a macro BS 110 a and a UE 120 d to facilitate communication between the BS 110 a and the UE 120 d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0036] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0037] The network controller 130 may be coupled to a set of BSs and provide coordination and control for the BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, for example, directly or indirectly via a wireless backhaul or a wired backhaul.

[0038] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. 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 device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / 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 wireless unit), a vehicle-mounted component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless medium or a wired medium.

[0039] Some UEs may be considered to be machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. For example, MTC and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered to be Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered to be customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component, a memory component, etc.).

[0040] Generally, in a given geographic area, any number of wireless networks can be deployed. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as a wireless technology, an air interface, etc. Frequency can also be referred to as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0041] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein performed by base station 110.

[0042] As indicated above, provide Figure 1 As an example. Other examples can be referred to Figure 1 The examples described are different.

[0043] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, where base station 110 may be Figure 1 UE 120 may be one of the base stations in Figure 1Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0044] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for the UE based at least in part on a channel quality indicator (CQI) received from each UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected 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), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), 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 (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in further detail below, position coding may be used to generate synchronization signals to transmit additional information.

[0045] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 258 may 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 channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0046] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and transmit to the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0047] Figure 2The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other components may perform one or more techniques associated with determining a sounding reference signal resource for a physical uplink shared channel (PUSCH) utilizing a configured grant, as described in greater detail elsewhere herein. For example, Figure 2 The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component may perform or direct, for example, Figure 8 The process of 800 Fig. 9 The process of 900 Fig.10 The operations of process 1000 and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0048] In some aspects, UE 120 may include: a unit for identifying a first SRS transmission that occurs most recently in time relative to a second SRS transmission prior to the transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; a unit for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, and so on. In some aspects, UE 120 may include: a unit for identifying a first SRS transmission that occurs prior to reception of activation downlink control information (DCI) and transmission of one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant; a unit for sending the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission; a unit for identifying a second SRS transmission that occurs after reception of the activation DCI and is most recent in time relative to one or more third SRS transmissions prior to transmission of one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to a configured grant; a unit for sending the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, and so on. In some aspects, UE 120 may include means for identifying a first SRS transmission that is closest in time to a second SRS transmission and occurs at least a certain number of symbols before the transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and means for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, among other things. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are described.

[0049] As indicated above, provide Figure 2 As an example. Other examples can be referred to Figure 2 The examples described are different.

[0050] Figure 3AAn exemplary frame structure 300 for frequency division duplex (FDD) in a telecommunication system (e.g., NR) is shown. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames (sometimes referred to as frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z ≥ 1) subframes (e.g., with indices from 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1 ms) and may include a set of time slots (e.g., in Figure 3A Each subframe 2 is shown m Each time slot may include a set of L symbol periods. For example, each time slot may include fourteen symbol periods (e.g., Figure 3A ), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two slots (e.g., when m=1), the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices from 0 to 2L-1. In some aspects, the scheduling unit for FDD may be frame-based, subframe-based, slot-based, symbol-based, etc.

[0051] Although some techniques are described herein in conjunction with frames, subframes, time slots, etc., these techniques may be equally applicable to other types of wireless communication structures, which may be referenced using terminology other than "frames," "subframes," "time slots," etc. in 5G NR. In some aspects, a wireless communication structure may refer to a time-limited communication unit with a period specified by a wireless communication standard and / or protocol. Additionally or alternatively, a wireless communication structure may be used in conjunction with Figure 3A The configurations of different wireless communication structures are shown in .

[0052] In some telecommunications (e.g., NR), a base station may send synchronization signals. For example, a base station may send a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the like on the downlink for each cell supported by the base station. The UE may use the PSS and SSS for cell search and acquisition. For example, the UE may use the PSS to determine symbol timing, and the UE may use the SSS to determine a physical cell identifier and frame timing associated with the base station. The base station may also send a physical broadcast channel (PBCH). The PBCH may carry certain system information, such as system information that supports initial access by the UE.

[0053] In some aspects, the base station may send the PSS, SSS, and / or PBCH according to a synchronization communication hierarchy (e.g., a synchronization signal (SS) hierarchy) including multiple synchronization communications (e.g., synchronization signal (SS) blocks), as described below in conjunction with Figure 3B as described.

[0054] Figure 3B is a block diagram conceptually illustrating an exemplary SS hierarchy, which is an example of a synchronous communication hierarchy. Figure 3B As shown in , the SS hierarchy may include an SS burst set, which may include multiple SS bursts (identified as SS burst 0 to SS burst B-1, where B is the maximum number of repetitions of the SS burst that can be sent by the base station). As further shown, each SS burst may include one or more SS blocks (identified as SS block 0 to SS block (b max_SS-1 ), where b max_SS-1 is the maximum number of SS blocks that can be carried by an SS burst. In some aspects, different SS blocks may be beamformed differently. A wireless node may periodically (such as every X milliseconds) send a set of SS bursts, such as Figure 3B In some aspects, the SS burst set may have a fixed or dynamic length. Figure 3B Shown in Y milliseconds.

[0055] Figure 3B The SS burst sets shown in are examples of synchronous communication sets, and other synchronous communication sets may be used in conjunction with the techniques described herein. Figure 3B The SS blocks shown in are examples of synchronous communications, and other synchronous communications may be used in conjunction with the techniques described herein.

[0056] In some aspects, an SS block includes resources that carry PSS, SSS, PBCH, and / or other synchronization signals (e.g., a third synchronization signal (TSS)) and / or synchronization channels. In some aspects, multiple SS blocks are included in an SS burst, and the PSS, SSS, and / or PBCH may be the same across each SS block of the SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, the length of an SS block may be at least four symbol periods, where each symbol carries one or more of a PSS (e.g., which occupies one symbol), an SSS (e.g., which occupies one symbol), and / or a PBCH (e.g., which occupies two symbols).

[0057] In some aspects, the symbols of the SS blocks are consecutive, such as Figure 3B In some aspects, the symbols of the SS blocks are non-contiguous. Similarly, in some aspects, one or more SS blocks of an SS burst may be sent in contiguous radio resources (e.g., contiguous symbol periods) during one or more time slots. Additionally or alternatively, one or more SS blocks of an SS burst may be sent in non-contiguous radio resources.

[0058] In some aspects, an SS burst may have a burst period, whereby an SS block of the SS burst is sent by the base station according to the burst period. In other words, the SS block may be repeated during each SS burst. In some aspects, an SS burst set may have a burst set periodicity, whereby an SS burst of the SS burst set is sent by the base station according to a fixed burst set periodicity. In other words, the SS burst may be repeated during each SS burst set.

[0059] The base station may send system information such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain time slots. The base station may send control information / data on a physical downlink control channel (PDCCH) in C symbol periods of a time slot, where B may be configurable for each time slot. The base station may send traffic data and / or other data on the PDSCH in the remaining symbol periods of each time slot.

[0060] As indicated above, provide Figure 3A and Figure 3B As an example. Other examples can be referred to Figure 3A and Figure 3B The examples described are different.

[0061] Figure 4 An exemplary slot format 410 with a normal cyclic prefix is ​​shown. The available time-frequency resources may be divided into resource blocks. Each resource block may cover a group of subcarriers (e.g., 12 subcarriers) in a slot and may include multiple resource elements. Each resource element may cover one subcarrier in a symbol period (e.g., in time) and may be used to send one modulation symbol, which may be real or complex valued.

[0062] For each of the downlink and uplink for FDD in some telecommunication systems (e.g., NR), an interlaced structure may be used. For example, Q interlaces with indices from 0 to Q-1 may be specified, where Q may be equal to 4, 6, 8, 10, or some other value. Each interlace may include time slots separated by Q frames. Specifically, an interlace q may include time slots q, q+Q, q+2Q, etc., where q∈{0, ..., Q-1}.

[0063] A UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, etc. The received signal quality may be quantified by a signal to noise plus interference ratio (SNIR), or a reference signal received quality (RSRQ), or some other metric. The UE may operate in a significant interference scenario, in which the UE may observe strong interference from one or more interfering BSs.

[0064] Although aspects of the examples described herein are associated with NR or 5G technology, aspects of the present disclosure may be applicable to other wireless communication systems. New Radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., different from an air interface based on Orthogonal Frequency Division Multiple Access (OFDMA)) or a fixed transport layer (e.g., different from Internet Protocol (IP)). In various aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may use CP-OFDM on the downlink, and include support for half-duplex operation using time division duplex (TDD). In various aspects, NR may, for example, utilize OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink, and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatible MTC technologies, and / or mission critical services targeting ultra-reliable low latency communications (URLLC) services.

[0065] In some aspects, a single component carrier bandwidth of 100 MHz may be supported. NR resource blocks may span 12 subcarriers in a duration of 0.1 milliseconds (ms), where the subcarriers have a bandwidth of 60 or 120 kilohertz (kHz). Each radio frame may include 40 time slots and may have a length of 10 ms. Thus, each time slot may have a length of 0.25 ms. Each time slot may indicate a link direction (e.g., DL or UL) for data transmission, and the link direction for each time slot may be switched dynamically. Each time slot may include DL / UL data and DL / UL control data.

[0066] Beamforming may be supported, and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas, multi-layer DL transmission with up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells. Alternatively, NR may support different air interfaces, different from OFDM-based interfaces. NR networks may include entities such as central units or distributed units.

[0067] As indicated above, provide Figure 4 As an example. Other examples can be referred to Figure 4 The examples described are different.

[0068] In a wireless network, a UE may send one or more SRSs to a BS. The SRSs may be associated with one or more uplink time-frequency resources (e.g., one or more resource blocks, one or more symbols, etc.) referred to as SRS resources. The BS may perform one or more measurements on the SRSs to estimate the channel quality of the associated one or more SRS resources. The BS may use the channel quality estimates to perform uplink scheduling for the UE, and the UE may send one or more PUSCH communications to the BS based at least in part on the uplink scheduling.

[0069] In some cases, the BS may dynamically configure an uplink grant for the transmission of one or more PUSCH communications. In these cases, the UE may send one or more SRSs to the BS, and the BS may indicate which SRS resources are to be used for the one or more PUSCH communications in an SRS resource indicator (SRI) field in a dynamic grant communication (e.g., downlink control information DCI and / or similar type of PDCCH communication). The UE may send one or more SRSs prior to receiving a dynamic grant.

[0070] In some cases, the BS may use semi-persistent scheduling to schedule the transmission of one or more PUSCH communications. In these cases, the BS may send a configured grant to the UE, and the UE may use the configured grant to send PUSCH communications for multiple time slots. Although semi-persistent scheduling reduces the signaling overhead for uplink scheduling, the UE may not be able to determine which SRS resources will be used for PUSCH communications scheduled by the configured grant. This may occur because the UE may send one or more SRSs after receiving the configured grant for the configured grant. As a result, the UE may not receive subsequent indications about which SRS resources associated with one or more SRSs will be used for the transmission of one or more PUSCH communications.

[0071] Some aspects described herein provide techniques and apparatus for resource determination of a PUSCH utilizing a configured grant. In some aspects, a BS may send a configured grant to a UE. The UE may send one or more SRSs, and may identify one or more SRS resources associated with the one or more SRSs to be used to send one or more PUSCH communications. For example, a type 1 configured grant (e.g., a configured grant configured and activated via radio resource control (RRC) signaling) may include an SRI field indicating that the UE will use one or more SRS resources associated with an SRS transmission that occurred most recently in time relative to other SRS transmissions prior to the transmission of one or more PUSCH communications for the transmission of one or more PUSCH communications.

[0072] As another example, a grant of a type 2 configuration (e.g., a grant of a configuration configured via RRC signaling and activated via activation downlink control information (DCI)) may include an SRI field indicating that the UE is to use one or more first SRS resources associated with a first SRS transmission occurring prior to reception of the activation DCI and transmission of the one or more first PUSCH communications for transmission of the one or more first PUSCH communications. The SRI field may also indicate that the UE is to use one or more second SRS resources associated with a second SRS transmission for transmission of the one or more second PUSCH communications, the second SRS transmission occurring most recently in time relative to other SRS transmissions after reception of the activation DCI and prior to transmission of the one or more second PUSCH communications.

[0073] As another example, a configured grant (e.g., a type 1 configured grant or a type 2 configured grant) may include an SRI field indicating that the UE is to use one or more SRS resources associated with an SRS transmission for transmission of one or more PUSCH communications, the SRS transmission occurring most recently in time relative to other SRS transmissions prior to the transmission of the one or more PUSCH communications and occurring at least a certain number of symbols prior to the transmission of the one or more PUSCH communications.

[0074] In this manner, a UE may employ the techniques and aspects described herein to identify SRS resources for transmitting one or more PUSCH communications scheduled via various types of configured grants that the UE was previously unable to perform.

[0075] Figure 5 is a diagram illustrating an example 500 for SRS resource determination for a PUSCH utilizing a configured grant in accordance with various aspects of the present disclosure. Figure 5As shown in , example 500 may include communications between a BS (e.g., BS 110) and a UE (e.g., UE 120). In some aspects, the BS may perform uplink scheduling for the UE. The uplink scheduling may include configuring uplink resources (e.g., time-frequency resources) for transmission of one or more PUSCH communications.

[0076] like Figure 5 As shown in and by reference numeral 502, the BS may perform uplink scheduling by scheduling transmission of one or more PUSCH communications via a configured grant. The BS may send the configured grant to the UE in an RRC communication. In this case, the configured grant may include a type 1 configured grant, which may be a configured grant configured and activated via RRC signaling in a PDCCH.

[0077] The RRC communication may include one or more fields or information elements (IEs) that indicate which SRS resources (e.g., uplink time-frequency resources) the UE will use to send one or more PUSCH communications configured by a configured grant. For example, the RRC communication may include an SRI field that indicates which SRS resources the UE will use to send one or more PUSCH communications. The SRI field may include an srs-ResourceIndicator IE and / or another type of IE. The SRI field may be included in another IE such as an rrc-ConfiguredUplinkGrant IE, etc. The SRI field may indicate that the UE will use one or more SRS resources associated with an SRS transmission to send a PUSCH communication that occurred most recently relative to the time when the PUSCH communication will be sent.

[0078] like Figure 5 As further shown in and by reference numeral 504, the UE may receive a configured grant and may identify one or more SRS resources for transmission of one or more PUSCH communications based at least in part on the configured grant. For example, the UE may identify an SRS transmission that occurred most recently in time relative to other SRS transmissions by the UE prior to transmission of one or more PUSCH communications scheduled by the configured grant based at least in part on the SRI field in the configured grant.

[0079] To illustrate the above example, the UE may send three SRSs (e.g., SRS 1, SRS 2, and SRS 3) in a specific time period. The UE may send SRS 1 first, may send SRS 2 after SRS 1, and may send SRS 3 after SRS 2. The configured grant may schedule one or more PUSCHs to be sent between the transmission of SRS 2 and SRS 3. Both SRS 1 and SRS 2 are sent before the transmission of one or more PUSCHs. However, the transmission of SRS 2 occurs most recently in time relative to the transmission of SRS 1 to the scheduled transmission of one or more PUSCHs. Therefore, the UE may identify the transmission of SRS 2 as the SRS transmission that occurs closest to the scheduled transmission of one or more PUSCHs. Therefore, the UE may identify one or more SRS resources associated with SRS 2 as SRS resources for sending one or more PUSCH communications.

[0080] As an illustration of another example above, the configured grant may schedule one or more PUSCHs to be sent after the sending of SRS 3. SRS 1, SRS 2, and SRS 3 are all sent before the sending of one or more PUSCHs. However, relative to the sending of SRS 1 and SRS 2, the sending of SRS 3 occurs closer to the scheduled sending of one or more PUSCHs. Therefore, the UE may identify the sending of SRS 3 as the SRS transmission that occurs closest to the scheduled sending of one or more PUSCHs. Therefore, the UE may identify one or more SRS resources associated with SRS 3 as SRS resources for sending one or more PUSCH communications.

[0081] In some aspects, an SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification, etc., may further indicate that the UE will use SRS resources associated with a specific SRS type for the transmission of one or more PUSCH communications. For example, an SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification (e.g., hard-coded at the UE), etc. may indicate that the UE will use SRS resources associated with periodic SRS transmissions, non-periodic SRS transmissions, and / or semi-persistent SRS transmissions. Accordingly, the UE may identify the SRS resources to be used for the transmission of one or more PUSCH communications by identifying the SRS transmission that is closest to the scheduled transmission of one or more PUSCH communications in the specified one or more SRS types. In some aspects, the BS may semi-statically (e.g., via RRC signaling) configure the UE to have an associated SRS resource set for one or more PUSCH communications scheduled by the configured grant. Thus, a configured grant PUSCH may be sent based on a specific configured SRS resource set.In some aspects, the BS may configure the UE to use a different SRS resource set for dynamically scheduled PUSCH communications (eg, by activating a DCI) relative to the SRS resource set configured via RRC signaling.

[0082] To illustrate the above example, SRS 1 may include a semi-persistent SRS, and SRS 2 may include an aperiodic SRS. If the SRI field included in the configured grant indicates that the UE is to use SRS resources associated with a semi-persistent SRS transmission or a periodic SRS transmission, the UE may identify SRS 1 as the SRS transmission that occurred most recently in time before the transmission of one or more PUSCH communications between the transmission of SRS 2 and the transmission of SRS 3 (e.g., because SRS 2 is not one of the indicated SRS types). Therefore, the UE may use the SRS resources associated with SRS 1 to transmit one or more PUSCH communications.

[0083] like Figure 5As further shown in and by reference numeral 506, the UE may use one or more SRS resources identified based at least in part on the configured grant to send one or more PUSCH communications. Thus, the UE may send one or more PUSCH communications in time-frequency resources corresponding to the one or more SRS resources. In some aspects, the number of SRS resources associated with the SRS transmission may be based at least in part on whether the one or more PUSCH communications are codebook-based PUSCH transmissions or non-codebook-based PUSCH communications. For example, the UE may use one SRS resource to send a codebook-based PUSCH communication. As another example, the UE may use multiple SRS resources to send non-codebook-based PUSCH communications.

[0084] In this way, the BS may transmit a configured grant that may include an SRI field indicating that the UE is to use one or more SRS resources associated with an SRS transmission that occurred most recently in time relative to other SRS transmissions prior to the transmission of the one or more PUSCH communications for the transmission of the one or more PUSCH communications. This allows the UE to identify SRS resources for the transmission of one or more PUSCH communications scheduled via the configured grant that the UE was previously unable to perform.

[0085] As indicated above, provide Figure 5 As an example. Other examples can be referred to Figure 5 The examples described are different.

[0086] Figure 6 6 is a diagram illustrating an example 600 of SRS resource determination for PUSCH utilizing a configured grant in accordance with various aspects of the present disclosure. Figure 6 As shown in , example 600 may include communications between a BS (e.g., BS 110) and a UE (e.g., UE 120). In some aspects, the BS may perform uplink scheduling for the UE. The uplink scheduling may include configuring uplink resources (e.g., time-frequency resources) for transmission of one or more PUSCH communications.

[0087] like Figure 6 As shown in and by reference numeral 602, the BS may perform uplink scheduling by scheduling transmission of one or more PUSCH communications via a configured grant and an activation DCI. The BS may send the configured grant to the UE in an RRC communication and the activation DCI to the UE in a DCI communication. In this case, the configured grant may include a type 2 configured grant, which may be a configured grant configured via RRC signaling in a PDCCH and activated via an activation DCI.

[0088] In some aspects, the RRC communication and / or activation DCI may include one or more fields or IEs indicating which SRS resources the UE will use to send one or more PUSCH communications configured by the configured grant. For example, the RRC communication and / or activation DCI may include an SRI field indicating which SRS resources the UE will use to send one or more PUSCH communications. The SRI field may be included in the activation DCI. The SRI field may include an srs-ResourceIndicator IE and / or another type of IE. The SRI field may be included in another IE such as an rrc-ConfiguredUplinkGrant IE, etc.

[0089] An SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification (e.g., hard-coded at the UE), etc., may indicate that the UE is to transmit a particular number of PUSCH communications using one or more first SRS resources associated with a first SRS transmission, where the first SRS transmission occurs prior to receipt of an activation DCI and prior to transmission of one or more first PUSCH communications (e.g., one PUSCH communication or multiple PUSCH communications). In some aspects, the UE may implicitly derive the number of PUSCH communications based at least in part on the periodicity of the PUSCH transmission (e.g., for all PUSCH transmissions falling into the same timeslot, or the same duration as the first PUSCH). An SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification (e.g., hard-coded at the UE), etc. may also indicate that the UE is to use SRS resources associated with the most recent SRS transmission that occurred after receipt of an activation DCI and relative to the time at which the PUSCH communication is to be sent, for transmission of PUSCH communications scheduled after a particular number of PUSCH communications.

[0090] like Figure 6As further shown in and by reference numeral 604, the UE may receive a configured grant and activation DCI, and may identify one or more SRS resources for transmission of one or more PUSCH communications based at least in part on the configured grant and activation DCI. For example, the UE may identify a first SRS transmission that occurred prior to the reception of the DCI and prior to the transmission of one or more first PUSCH communications scheduled by the configured grant and / or activation DCI, and may identify a second SRS transmission that occurred most recently in time relative to other SRS transmissions after the reception of the activation DCI and prior to the transmission of one or more second PUSCH communications scheduled by the configured grant and / or activation DCI. In some aspects, the UE may continue to identify SRS resources for subsequent transmissions of PUSCH communications scheduled by the configured grant and / or activation DCI by identifying an SRS transmission that occurred most recently in time relative to other SRS transmissions after the reception of the activation DCI and prior to the transmission of subsequent PUSCH communications.

[0091] To illustrate the above example, the UE may send three SRSs (e.g., SRS 1, SRS 2, and SRS 3) in a specific time period. The UE may send SRS 1 first, may send SRS 2 after SRS 1, and may send SRS 3 after SRS 2. The configured grant and / or activation DCI may schedule one or more PUSCHs to be sent between the transmission of SRS 2 and SRS 3. Both SRS 1 and SRS 2 are sent before the transmission of one or more PUSCHs. The transmission of SRS 1 occurs before the reception of the activation DCI, and the transmission of SRS 2 occurs after the reception of the activation DCI. Since the transmission of SRS 1 occurs before the reception of the activation DCI (e.g., the transmission of SRS 1 may be the most recent SRS transmission before the reception of the activation DCI), the UE may identify the SRS resources associated with SRS 1, and may use the SRS resources to send a specific number of PUSCH communications scheduled to be sent after the reception of the activation DCI.

[0092] In addition, any remaining PUSCH communications scheduled to be sent between the transmission of SRS 2 and SRS 3 and not sent using SRS resources associated with SRS 1 may be sent using SRS resources associated with SRS 2. This is because the transmission of SRS 2 occurs after the reception of the activation DCI and is the most recent SRS transmission prior to the scheduled transmission of the remaining PUSCH communications between SRS 2 and SRS 3.

[0093] After reception of the activation DCI, the UE may continue to use the SRS resources associated with the SRS transmission that occurred most recently for the scheduled transmission of the PUSCH communication to transmit PUSCH communications. For example, the UE may use the SRS resources associated with SRS 3 for transmission of one or more PUSCH communications that are scheduled to be transmitted most recently after the transmission of SRS 3 and before the transmission of another SRS.

[0094] In some aspects, an SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification (e.g., hard-coded at the UE), etc., may indicate that the UE is to use SRS resources associated with a particular SRS type for transmission of one or more PUSCH communications. For example, the SRI field may indicate that the UE is to use SRS resources associated with periodic SRS transmissions, non-periodic SRS transmissions, and / or semi-persistent SRS transmissions. Thus, the UE may identify one or more first SRS resources to be used for transmission of one or more first PUSCH communications by identifying one or more first SRS transmissions of a first specified SRS type that occurred prior to reception of an activation DCI and prior to transmission of one or more first PUSCH communications, may identify one or more second SRS resources to be used for transmission of one or more second PUSCH communications by identifying one or more second SRS transmissions of a second specified SRS type that occurred most recently prior to reception of an activation DCI and prior to transmission of one or more second PUSCH communications, and so on.

[0095] As in Figure 6 As further shown in and by reference numeral 606, the UE may use one or more SRS resources identified based at least in part on the configured grant and activation DCI to send one or more PUSCH communications. Thus, the UE may send one or more PUSCH communications in time-frequency resources corresponding to the one or more SRS resources. For example, the UE may use one SRS resource to send a codebook-based PUSCH communication. As another example, the UE may use multiple SRS resources to send a non-codebook-based PUSCH communication.

[0096] In this way, the BS may send a configured grant and / or activation DCI indicating that the UE will use one or more first SRS resources associated with a first SRS transmission for transmission of one or more first PUSCH communications, the first SRS transmission occurring prior to reception of the activation DCI and prior to transmission of the one or more first PUSCH communications. The configured grant and / or activation DCI may further indicate that the UE will use one or more second SRS resources associated with a second SRS transmission for transmission of one or more second PUSCH communications, the second SRS transmission occurring most recently in time relative to other SRS transmissions after reception of the activation DCI and prior to transmission of the one or more second PUSCH communications. This allows the UE to identify SRS resources for transmission of one or more PUSCH communications scheduled via the configured grant and / or activation DCI that the UE was previously unable to perform.

[0097] As indicated above, provide Figure 6 As an example. Other examples can be referred to Figure 6 The examples described are different.

[0098] Figure 7 is a diagram illustrating an example 700 for SRS resource determination for a PUSCH utilizing a configured grant in accordance with various aspects of the present disclosure. Figure 7 As shown in , example 700 may include communications between a BS (e.g., BS 110) and a UE (e.g., UE 120). In some aspects, the BS may perform uplink scheduling for the UE. The uplink scheduling may include configuring uplink resources (e.g., time-frequency resources) for transmission of one or more PUSCH communications.

[0099] like Figure 7 As shown in and by reference numeral 702, the BS may perform uplink scheduling by scheduling transmission of one or more PUSCH communications via a configured grant. The BS may send the configured grant to the UE in an RRC communication. The configured grant may include a type 1 configured grant (e.g., a configured grant configured and activated via RRC signaling in a PDCCH) or a type 2 configured grant (e.g., a configured grant configured via RRC signaling in a PDCCH and activated via an activation DCI in a PDCCH).

[0100] The RRC communication may include one or more fields or IEs that indicate which SRS resources (e.g., uplink time-frequency resources) the UE will use to send one or more PUSCH communications configured by the configured grant. For example, the RRC communication may include an SRI field that indicates which SRS resources the UE will use to send one or more PUSCH communications. The SRI field may include an srs-ResourceIndicator IE and / or another type of IE. The SRI field may be included in another IE such as an rrc-ConfiguredUplinkGrant IE or the like. The SRI field may indicate that the UE will use one or more SRS resources associated with an SRS transmission to send a PUSCH communication, which SRS transmission occurs most recently relative to the time when the PUSCH communication is to be sent and occurs at least a certain number of symbols (e.g., three symbols, five symbols, etc.) before the time when the PUSCH communication is to be sent.

[0101] like Figure 7 As further shown in and by reference numeral 704, the UE may receive a configured grant and may identify one or more SRS resources for transmission of one or more PUSCH communications based at least in part on the configured grant. For example, the UE may identify an SRS transmission that occurred most recently in time relative to other SRS transmissions by the UE and at least a certain number of symbols prior to transmission of the one or more PUSCH communications scheduled by the configured grant.

[0102] To illustrate the above example, the UE may send two SRSs (e.g., SRS 1 and SRS 2) in a specific time period. The UE may send SRS 1 first, and may send SRS 2 after SRS 1. The configured grant may schedule one or more PUSCHs to be sent after the transmission of SRS 1 and SRS 2. However, the transmission of SRS 2 does not occur before the scheduled transmission of one or more PUSCHs by at least a certain number of symbols indicated in the configured grant. Therefore, the UE may identify the transmission of SRS 1 as an SRS transmission that occurs most recently for the scheduled transmission of one or more PUSCHs and occurs at least a certain number of symbols before the scheduled transmission of one or more PUSCHs. Therefore, the UE may identify one or more SRS resources associated with SRS 1 as SRS resources for sending one or more PUSCH communications.

[0103] In some aspects, the number of symbols may be different for different PUSCH communications. For example, the number of symbols associated with a first PUSCH communication after SRS 2 may be different from the number of symbols associated with a second PUSCH communication after SRS 2. In this case, the UE may determine, for each PUSCH communication, which SRS transmission (and corresponding SRS resource) to use for transmission of the PUSCH communication. In some aspects, the number of symbols may be N2, which may be the minimum processing time necessary for the UE to prepare for a PUSCH communication after receiving an uplink grant.

[0104] In some aspects, an SRI field included in a configured grant, another RRC parameter field in a configured grant, or another signaling communication, table, or specification (e.g., hard-coded at the UE), etc., may further indicate that the UE is to use SRS resources associated with a particular SRS type for transmission of one or more PUSCH communications. For example, the SRI field may indicate that the UE is to use SRS resources associated with periodic SRS transmissions, aperiodic SRS transmissions, and / or semi-persistent SRS transmissions. Thus, the UE may identify the SRS resources to be used for transmission of one or more PUSCH communications by identifying the SRS transmission of the specified one or more SRS types that is closest to the scheduled transmission of one or more PUSCH communications.

[0105] As in Figure 7 As further shown in and by reference numeral 706, the UE may use one or more SRS resources identified based at least in part on the configured grant to send one or more PUSCH communications. Thus, the UE may send one or more PUSCH communications in time-frequency resources corresponding to the one or more SRS resources. For example, the UE may use one SRS resource to send a codebook-based PUSCH communication. As another example, the UE may use multiple SRS resources to send a non-codebook-based PUSCH communication.

[0106] In this way, the BS may transmit a grant that may include a field configuration of the SRI indicating that the UE is to use one or more SRS resources associated with an SRS transmission for transmission of one or more PUSCH communications, the SRS transmission occurring most recently in time relative to other SRS transmissions prior to the transmission of the one or more PUSCH communications and occurring at least a certain number of symbols prior to the transmission of the one or more PUSCH communications. This allows the UE to identify SRS resources for transmission of one or more PUSCH communications scheduled via the configured grant that the UE was previously unable to perform.

[0107] As indicated above, provide Figure 7As an example. Other examples can be referred to Figure 7 The examples described are different.

[0108] Figure 8 is a diagram illustrating an example process 800 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 800 is an example of a UE (eg, UE 120) performing operations associated with SRS resource determination for a PUSCH utilizing a configured grant.

[0109] like Figure 8 As shown in , in some aspects, process 800 may include: identifying a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant (block 810). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) identify a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of the one or more PUSCH communications, as described above. In some aspects, the one or more PUSCH communications may correspond to a configured grant.

[0110] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include sending one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission (block 820). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) send one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, as described above.

[0111] Process 800 may include additional aspects, such as any single implementation or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0112] In a first aspect, the configured grant comprises a Type 1 configured grant comprising an RRC configured and activated grant.

[0113] In a second aspect, either alone or in combination with the first aspect, process 800 further includes: identifying one or more SRS resources associated with a first SRS transmission based at least in part on an SRI field of a grant indication configured via RRC; and sending one or more PUSCH communications using the one or more SRS resources includes sending one or more PUSCH communications using the one or more SRS resources based at least in part on identifying the one or more SRS resources.

[0114] In a third aspect, alone or in combination with one or more of the first or second aspects, identifying the first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being a periodic SRS transmission. In a fourth aspect, alone or in combination with one or more of the first to third aspects, identifying the first SRS transmission includes: identifying the first SRS transmission based at least in part on the first SRS transmission being a non-periodic SRS transmission.

[0115] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, identifying a first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being a semi-persistent SRS transmission. In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, identifying a first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being at least one of a periodic SRS transmission or a semi-persistent SRS transmission. In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, identifying a first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being at least one of a periodic SRS transmission, a non-periodic SRS transmission, or a semi-persistent SRS transmission.

[0116] Although Figure 8 Example blocks of process 800 are shown, but in some aspects, the same Figure 8 Process 800 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than depicted in . Additionally or alternatively, two or more of the blocks of process 800 may be performed in parallel.

[0117] Fig. 9 is a diagram illustrating an exemplary process 900, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Exemplary process 900 is an example of a UE (eg, UE 120) performing operations associated with SRS resource determination for a PUSCH utilizing a configured grant.

[0118] like Fig. 9As shown in , in some aspects, process 900 may include identifying a first SRS transmission that occurs prior to receiving an activation DCI and transmitting one or more first PUSCH communications, wherein the one or more first PUSCH communications correspond to a configured grant (block 910). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) identify a first SRS transmission that occurs prior to receiving an activation DCI and transmitting one or more first PUSCH communications, as described above. In some aspects, the one or more first PUSCH communications correspond to a configured grant.

[0119] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include sending one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission (block 920). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) send one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission, as described above.

[0120] like Fig. 9 As further shown in , in some aspects, process 900 may include identifying a second SRS transmission that occurred most recently in time relative to one or more third SRS transmissions after reception of an activation DCI and prior to transmission of one or more second PUSCH communications, wherein the one or more second PUSCH communications correspond to a configured grant (block 930). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) identify a second SRS transmission that occurred most recently in time relative to one or more third SRS transmissions after reception of an activation DCI and prior to transmission of one or more second PUSCH communications, as described above. In some aspects, the one or more second PUSCH communications correspond to a configured grant.

[0121] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include sending one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission (block 940). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) send one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, as described above.

[0122] Process 900 may include additional aspects, such as any single implementation or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0123] In a first aspect, the configured grant comprises a type 2 configured grant, and the type 2 configured grant comprises an RRC configured grant activated by a DCI activation. In a second aspect, alone or in combination with the first aspect, process 900 further comprises identifying one or more first SRS resources associated with a first SRS transmission based at least in part on an SRI field indicated by the activation DCI, and sending one or more first PUSCH communications using the one or more first SRS resources comprises sending the one or more first PUSCH communications using the one or more first SRS resources based at least in part on identifying the one or more first SRS resources.

[0124] In a third aspect, alone or in combination with one or more of the first or second aspects, process 900 also includes identifying one or more second SRS resources associated with a second SRS transmission based at least in part on an SRI field indicated by activating the DCI, and sending one or more second PUSCH communications using the one or more second SRS resources includes sending one or more second PUSCH communications using the one or more second SRS resources based at least in part on identifying the one or more second SRS resources.

[0125] In a fourth aspect, alone or in combination with one or more of the first to third aspects, identifying a first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being a periodic SRS transmission. In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, identifying a second SRS transmission includes identifying the second SRS transmission based at least in part on the second SRS transmission being a periodic SRS transmission.

[0126] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, identifying a first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being a non-periodic SRS transmission. In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, identifying a second SRS transmission comprises identifying the second SRS transmission based at least in part on the second SRS transmission being a non-periodic SRS transmission.

[0127] In an eighth aspect, either alone or in combination with one or more of aspects 1 to 7, identifying a first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being a semi-persistent SRS transmission. In a ninth aspect, either alone or in combination with one or more of aspects 1 to 8, identifying a second SRS transmission comprises identifying the second SRS transmission based at least in part on the second SRS transmission being a semi-persistent SRS transmission.

[0128] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, identifying a first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being at least one of a periodic SRS transmission or a semi-persistent SRS transmission. In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, identifying a second SRS transmission includes: identifying the second SRS transmission based at least in part on the second SRS transmission being at least one of a periodic SRS transmission or a semi-persistent SRS transmission.

[0129] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, identifying a first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being at least one of a periodic SRS transmission, an aperiodic SRS transmission, or a semi-persistent SRS transmission. In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, identifying a second SRS transmission includes identifying the second SRS transmission based at least in part on the second SRS transmission being at least one of a periodic SRS transmission, an aperiodic SRS transmission, or a semi-persistent SRS transmission.

[0130] Although Fig. 9 Example blocks of process 900 are shown, but in some aspects, the Fig. 9 Process 900 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than depicted in . Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

[0131] Fig.10 is a diagram illustrating an exemplary process 1000, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Exemplary process 1000 is an example of a UE (eg, UE 120) performing operations associated with SRS resource determination for a PUSCH utilizing a configured grant.

[0132] like Fig.10As shown in , in some aspects, process 1000 may include: identifying a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more PUSCH communications and occurred at least a certain number of symbols prior to transmission of the one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant (block 1010). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) identify a first SRS transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of the one or more PUSCH communications and occurred at least a certain number of symbols prior to transmission of the one or more PUSCH communications, as described above. In some aspects, the one or more PUSCH communications correspond to a configured grant.

[0133] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include sending one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission (block 1020). For example, the UE may (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) send one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, as described above.

[0134] Process 1000 may include additional aspects, such as any single implementation or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0135] In a first aspect, the configured grant comprises a type 1 configured grant, the type 1 configured grant comprising an RRC configured and activated grant. In a second aspect, alone or in combination with the first aspect, the configured grant comprises a type 2 configured grant, the type 2 configured grant comprising an RRC configured grant activated by activating a DCI. In a third aspect, alone or in combination with one or more of the first or second aspects, process 1000 further comprises: identifying one or more SRS resources based at least in part on the SRI field, and sending one or more PUSCH communications using the one or more SRS resources comprises sending one or more PUSCH communications using the one or more SRS resources based at least in part on identifying the one or more SRS resources.

[0136] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, identifying the first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being a periodic SRS transmission. In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, identifying the first SRS transmission includes identifying the first SRS transmission based at least in part on the first SRS transmission being a non-periodic SRS transmission.

[0137] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, identifying the first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being a semi-persistent SRS transmission. In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, identifying the first SRS transmission comprises identifying the first SRS transmission based at least in part on the first SRS transmission being at least one of a periodic SRS transmission or a semi-persistent SRS transmission.

[0138] In an eighth aspect, either alone or in combination with one or more of aspects one to seven, identifying a first SRS transmission includes identifying the first SRS transmission based at least in part on whether the first SRS transmission is at least one of a periodic SRS transmission, a non-periodic SRS transmission, or a semi-persistent SRS transmission.

[0139] Although Fig.10 Example blocks of process 1000 are shown, but in some aspects, the same Fig.10 Process 1000 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than depicted in . Additionally or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

[0140] The above 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 may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0141] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0142] It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any respect. Thus, the operation and performance of the systems and / or methods are described herein without reference to specific software code—it should be understood that software and hardware to implement the systems and / or methods can be designed based, at least in part, on the description herein.

[0143] Although the specific combination of features is set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically recorded in the claims and / or not disclosed in the specification. Although each dependent claim listed below can directly rely on only one claim, the disclosure of various aspects includes each dependent claim of each other claim combined in the claim set. The phrase of "at least one of" referring to the list of items refers to any combination of these items, including single members. For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other ordering of a, b and c).

[0144] Any element, action or instruction used in this article should not be interpreted as being critical or essential, unless so clearly described. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (for example, related items, irrelevant items, combinations of related items and irrelevant items, etc.), and can be used interchangeably with "one or more". In the case of only wanting to refer to an item, the phrase "only one" or similar terms are used. In addition, as used herein, the terms "containing", "having", "comprising" etc. are intended to be open terms. Further, unless otherwise explicitly stated, the phrase "based on" is intended to mean "based at least in part on".

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: identifying a first sounding reference signal (SRS) transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more physical uplink shared channel (PUSCH) communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

2. The method according to claim 1, wherein: The configuration permission includes: Type 1 configuration permission, The type 1 configuration permission includes: A grant configured and activated by Radio Resource Control (RRC).

3. The method according to claim 2, further comprising: identifying the one or more SRS resources associated with the first SRS transmission based at least in part on an SRS resource indicator (SRI) field of a grant indicated configured and activated by the RRC; as well as The sending of the one or more PUSCH communications using the one or more SRS resources includes: Based at least in part on identifying the one or more SRS resources, the one or more PUSCH communications are sent using the one or more SRS resources.

4. The method according to claim 1, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being a periodic SRS transmission.

5. The method according to claim 1, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being at least one of: Periodic SRS transmission, or Semi-persistent SRS transmission.

6. The method according to claim 1, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being at least one of: Periodic SRS transmission, Aperiodic SRS transmission, or Semi-persistent SRS transmission.

7. A method of wireless communication performed by a user equipment (UE), comprising: Identifying a first sounding reference signal (SRS) transmission that occurs before: Reception of activation downlink control information (DCI), and transmission of one or more first physical uplink shared channel (PUSCH) communications, wherein the one or more first PUSCH communications correspond to a configured grant; transmitting the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission, wherein the one or more first SRS resources are uplink time-frequency resources; Identify the second SRS transmission that occurs when: After receipt of said activation DCI, and immediately before the transmission of the one or more second PUSCH communications relative to the one or more third SRS transmissions in time, wherein the one or more second PUSCH communications correspond to the configured grant; and transmitting the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, wherein the one or more second SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

8. The method according to claim 7, wherein: The configuration permission includes: Type 2 configuration permission, The type 2 configuration permission includes: A grant of a radio resource control (RRC) configuration activated by the activation DCI.

9. The method according to claim 7, further comprising: identifying the one or more first SRS resources associated with the first SRS transmission based at least in part on an SRS resource indicator (SRI) field indicated by the activation DCI; as well as The sending of the one or more first PUSCH communications using the one or more first SRS resources includes: Based at least in part on identifying the one or more first SRS resources, the one or more first PUSCH communications are sent using the one or more first SRS resources.

10. The method according to claim 7, further comprising: identifying the one or more second SRS resources associated with the second SRS transmission based at least in part on an SRS resource indicator (SRI) field indicated by the activation DCI; as well as The sending of the one or more second PUSCH communications using the one or more second SRS resources includes: Based at least in part on identifying the one or more second SRS resources, the one or more second PUSCH communications are sent using the one or more second SRS resources.

11. The method according to claim 7, wherein: Identifying the second SRS transmission includes: The second SRS transmission is identified based at least in part on the second SRS transmission being at least one of: Periodic SRS transmission, or Semi-persistent SRS transmission.

12. The method according to claim 9, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being at least one of: Periodic SRS transmission, Aperiodic SRS transmission, or Semi-persistent SRS transmission.

13. The method according to claim 7, wherein: Identifying the second SRS transmission includes: The second SRS transmission is identified based at least in part on the second SRS transmission being at least one of: Periodic SRS transmission, Aperiodic SRS transmission, or Semi-persistent SRS transmission.

14. A method of wireless communication performed by a user equipment (UE), comprising: Identify a first sounding reference signal (SRS) transmission that occurs when: immediately before the transmission of one or more physical uplink shared channel (PUSCH) communications relative to the second SRS transmission in time, and at least a number of symbols prior to said transmission of said one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

15. The method according to claim 14, wherein: The configuration permission includes: Type 1 configuration permission, The type 1 configuration permission includes: A grant configured and activated by Radio Resource Control (RRC).

16. The method according to claim 14, wherein: The configuration permission includes: Type 2 configuration permission, The type 2 configuration permission includes: A grant configured by Radio Resource Control (RRC) activated by activating Downlink Control Information (DCI).

17. The method according to claim 14, further comprising: identifying the one or more SRS resources based at least in part on an SRS resource indicator (SRI) field; as well as The sending of the one or more PUSCH communications using the one or more SRS resources includes: Based at least in part on identifying the one or more SRS resources, the one or more PUSCH communications are sent using the one or more SRS resources.

18. The method according to claim 14, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being a periodic SRS transmission.

19. The method according to claim 14, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being at least one of: Periodic SRS transmission, or Semi-persistent SRS transmission.

20. The method according to claim 14, wherein: Identifying the first SRS transmission includes: The first SRS transmission is identified based at least in part on the first SRS transmission being at least one of: Periodic SRS transmission, Aperiodic SRS transmission, or Semi-persistent SRS transmission.

21. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: identifying a first sounding reference signal (SRS) transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more physical uplink shared channel (PUSCH) communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

22. A non-transitory computer readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: identifying a first sounding reference signal (SRS) transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more physical uplink shared channel (PUSCH) communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

23. An apparatus for wireless communication, comprising: means for identifying a first sounding reference signal (SRS) transmission that occurred most recently in time relative to a second SRS transmission prior to transmission of one or more physical uplink shared channel (PUSCH) communications, wherein the one or more PUSCH communications correspond to a configured grant; and means for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the device after receiving the configured grant.

24. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: Identifying a first sounding reference signal (SRS) transmission that occurs before: Reception of activation downlink control information (DCI), and transmission of one or more first physical uplink shared channel (PUSCH) communications, wherein the one or more first PUSCH communications correspond to a configured grant; transmitting the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission, wherein the one or more first SRS resources are uplink time-frequency resources; Identify the second SRS transmission that occurs when: After receipt of the activation DCI, and immediately before the transmission of the one or more second PUSCH communications relative to the one or more third SRS transmissions in time, wherein the one or more second PUSCH communications correspond to the configured grant; and transmitting the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, wherein the one or more second SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

25. A non-transitory computer readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: Identifying a first sounding reference signal (SRS) transmission that occurs before: Reception of activation downlink control information (DCI), and transmission of one or more first physical uplink shared channel (PUSCH) communications, wherein the one or more first PUSCH communications correspond to a configured grant; transmitting the one or more first PUSCH communications using one or more first SRS resources associated with the first SRS transmission, wherein the one or more first SRS resources are uplink time-frequency resources; Identify the second SRS transmission that occurs when: After receipt of the activation DCI, and immediately before the transmission of the one or more second PUSCH communications relative to the one or more third SRS transmissions in time, wherein the one or more second PUSCH communications correspond to the configured grant; and transmitting the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, wherein the one or more second SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

26. An apparatus for wireless communication, comprising: Means for identifying a first sounding reference signal (SRS) transmission occurring before: Reception of activation downlink control information (DCI), and transmission of one or more first physical uplink shared channel (PUSCH) communications, wherein the one or more first PUSCH communications correspond to a configured grant; means for transmitting the one or more first SRS communications using one or more first SRS resources associated with the first SRS transmission, wherein the one or more first SRS resources are uplink time-frequency resources; A means for identifying a second SRS transmission occurring in the following situations: After receipt of the activation DCI, and immediately before the transmission of the one or more second PUSCH communications relative to the one or more third SRS transmissions in time, wherein the one or more second PUSCH communications correspond to the configured grant; and means for transmitting the one or more second PUSCH communications using one or more second SRS resources associated with the second SRS transmission, wherein the one or more second SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the device after receiving the configured grant.

27. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: Identify a first sounding reference signal (SRS) transmission that occurs when: immediately before the transmission of one or more physical uplink shared channel (PUSCH) communications relative to the second SRS transmission in time, and at least a number of symbols prior to said transmission of said one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

28. A non-transitory computer readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to: Identify a first sounding reference signal (SRS) transmission that occurs when: immediately before the transmission of one or more physical uplink shared channel (PUSCH) communications relative to the second SRS transmission in time, and at least a number of symbols prior to said transmission of said one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the UE after receiving the configured grant.

29. An apparatus for wireless communication, comprising: Means for identifying a first sounding reference signal (SRS) transmission occurring in: immediately before the transmission of one or more physical uplink shared channel (PUSCH) communications relative to the second SRS transmission in time, and at least a number of symbols prior to said transmission of said one or more PUSCH communications, wherein the one or more PUSCH communications correspond to a configured grant; and means for transmitting the one or more PUSCH communications using one or more SRS resources associated with the first SRS transmission, wherein the one or more SRS resources are uplink time-frequency resources, The first SRS transmission and the second SRS transmission are sent by the device after receiving the configured grant.

Images