Precoder indication for non-codebook based uplink transmission

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive downlink control information from a base station indicating a single precoder indication associated with non-codebook usage. The UE may transmit to the base station the single antenna panel uplink transmission or the multi-antenna panel uplink transmission based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission. Numerous other aspects are provided.

Description

[0001] Public domain

[0002] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for precoder indication for non-codebook based uplink transmissions.

[0003] background

[0004] Wireless communication systems are widely deployed to provide various 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 enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include several base stations (BSs) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, and 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 at the city, country, region, and even global level. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0007] Overview

[0008] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving downlink control information (DCI) indicating a single precoder indication associated with non-codebook usage from a base station; and transmitting the single antenna panel uplink transmission or the multi-antenna panel uplink transmission to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0009] In some aspects, a wireless communication method performed by a base station may include: transmitting a DCI indicating a single precoder indication associated with non-codebook usage to a UE; and receiving the single antenna panel uplink transmission or the multi-antenna panel uplink transmission from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0010] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to perform the following operations: receiving a DCI indicating a single precoder indication associated with non-codebook usage from a base station; and transmitting the single antenna panel uplink transmission or the multi-antenna panel uplink transmission to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to perform the following operations: transmitting a DCI indicating a single precoder indication associated with non-codebook usage to a UE; and receiving the single antenna panel uplink transmission or the multi-antenna panel uplink transmission from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink 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: receive a DCI indicating a single precoder indication associated with non-codebook usage from a base station; and transmit the single antenna panel uplink transmission or the multi-antenna panel uplink transmission to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0013] In some aspects, a base station 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: transmit a DCI indicating a single precoder indication associated with non-codebook usage to a UE; and receive the single antenna panel uplink transmission or the multi-antenna panel uplink transmission from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0014] In some aspects, an apparatus for wireless communication may include: a device for receiving a DCI indicating a single precoder indication associated with non-codebook usage from a base station; and a device for transmitting the single antenna panel uplink transmission or the multi-antenna panel uplink transmission to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0015] In some aspects, an apparatus for wireless communication may include: a device for transmitting a DCI indicating a single precoder indication associated with non-codebook usage to a UE; and a device for receiving the single antenna panel uplink transmission or the multi-antenna panel uplink transmission from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission.

[0016] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0017] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0021] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network according to various aspects of the present disclosure.

[0022] Figure 3 An example logical architecture of a distributed radio access network (RAN) in accordance with aspects of the present disclosure is illustrated.

[0023] Figure 4 is a diagram illustrating an example of multiple transmit reception point (TRP) communications according to various aspects of the present disclosure.

[0024] Figure 5 is a diagram illustrating an example of multi-antenna panel (multi-panel) simultaneous uplink transmission in accordance with various aspects of the present disclosure.

[0025] Figures 6A-6C is a diagram illustrating examples associated with precoder indication for non-codebook based uplink transmission according to various aspects of the present disclosure.

[0026] Figure 7 and8 is a diagram illustrating example procedures associated with precoder indication for non-codebook based uplink transmissions in accordance with various aspects of the present disclosure.

[0027] Detailed Description

[0028] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently implemented or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0029] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0030] It should be noted that although various aspects may be described herein using terminology associated with 5G or NR radio access technology (RAT), various aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0031] Figure 11 is a diagram illustrating an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, etc. or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, a B node, a gNB, a 5G B node (NB), an access point, a transmit receive point (TRP), etc. 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.

[0032] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , 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. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0033] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0034] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0035] 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).

[0036] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0037] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0038] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client 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. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0039] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0040] 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 as being performed by base station 110.

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

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

[0043] At 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 each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for 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)), demodulation reference signals (DMRS), etc.) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0044] At UE 120, antennas 252a 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. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The 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 housing 284.

[0045] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0046] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulators and / or demodulators 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (eg, as described with reference to Figures 6A-6C , 7 and 8).

[0047] 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 where 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 communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (eg, controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (eg, as described with reference to Figures 6A-6C , 7 and 8).

[0048] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with precoder indication for non-codebook based uplink transmission, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 7 The process 700 Figure 8 800, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 7 The process 700 Figure 8 The process 800 of , and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc.

[0049] In some aspects, UE 120 may include: means for receiving a DCI indicating a single precoder indication associated with non-codebook usage; means for transmitting the single antenna panel uplink transmission or the multi-antenna panel uplink transmission based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multi-antenna panel uplink transmission, etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0050] In some aspects, base station 110 may include: means for transmitting a DCI indicating a single precoder indication associated with non-codebook usage; means for receiving the single antenna panel uplink transmission or the multi-antenna panel uplink transmission based at least in part on whether the single precoder indication indicates the single antenna panel uplink transmission or the multi-antenna panel uplink transmission, etc. In some aspects, such means may include combining Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0051] although Figure 2 The blocks in the 200 and 210 are illustrated as different components, but the functions described above with respect to these blocks may be implemented with a single hardware, software, or combined component or a combination of various components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by the processor 280 or under the control of the processor 280.

[0052] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described herein. Figure 2 Examples described.

[0053] Figure 3 An example logical architecture of a distributed RAN 300 is illustrated in accordance with aspects of the present disclosure.

[0054] The 5G access node 305 may include an access node controller 310. The access node controller 310 may be a central unit (CU) of the distributed RAN 300. In some aspects, a backhaul interface to the 5G core network 315 may terminate at the access node controller 310. The 5G core network 315 may include a 5G control plane component 320 and a 5G user plane component 325 (e.g., a 5G gateway), and the backhaul interface for one or both of the 5G control plane and the 5G user plane may terminate at the access node controller 310. Additionally or alternatively, a backhaul interface to one or more neighbor access nodes 330 (e.g., another 5G access node 305, an LTE access node, etc.) may terminate at the access node controller 310.

[0055] The access node controller 310 may include one or more TRPs 335 and / or may communicate with one or more TRPs (e.g., via an F1 control (F1-C) interface and / or an F1 user (F1-U) interface). The TRP 335 may be a distributed unit (DU) of the distributed RAN 300. In some aspects, the TRP 335 may correspond to the above combined Figure 1 The base station 110 described herein may be a base station 110. For example, different TRPs 335 may be included in different base stations 110. Additionally or alternatively, multiple TRPs 335 may be included in a single base station 110. In some aspects, a base station 110 may include a CU (e.g., an access node controller 310) and / or one or more DUs (e.g., one or more TRPs 335). In some cases, a TRP 335 may be referred to as a cell, a panel, an antenna array, an array, etc.

[0056] The TRP 335 may be connected to a single access node controller 310 or to multiple access node controllers 310. In some aspects, there may be a dynamic configuration of split logical functions within the architecture of the distributed RAN 300. For example, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, a media access control (MAC) layer, etc. may be configured to terminate at an access node controller 310 or a TRP 335.

[0057] In some aspects, multiple TRPs 335 may transmit communications (e.g., the same communication or different communications) in the same transmission time interval (TTI) (e.g., time slot, mini-time slot, subframe, codeword, etc.) or in different TTIs using different quasi co-location (QCL) relationships (e.g., different spatial parameters, different transmission configuration indicator (TCI) states, different precoding parameters, different beamforming parameters, etc.). In some aspects, the TCI state may be used to indicate one or more QCL relationships. The TRPs 335 may be configured to serve traffic to the UE 120 individually (e.g., using dynamic selection) or jointly (e.g., using joint transmission with one or more other TRPs 335).

[0058] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described in Figure 3 Examples described.

[0059] Figure 4 4 is a diagram illustrating an example 400 of multi-TRP communication (sometimes referred to as multi-panel communication) in accordance with various aspects of the present disclosure. Figure 4 As shown in FIG. 4 , multiple TRPs 405 may communicate with the same UE 410. The TRPs 405 may correspond to the above combined Figure 3 TRP 335 as described.

[0060] Multiple TRPs 405 (shown as TRP A and TRP B) can communicate with the same UE 410 in a coordinated manner (e.g., using coordinated multipoint transmission, etc.) to improve reliability, increase throughput, etc. The TRPs 405 can coordinate such communications via interfaces between the TRPs 405 (e.g., backhaul interfaces, access node controllers 310, etc.). When the TRPs 405 are co-located with the same base station 110 (e.g., when the TRPs 405 are different antenna arrays or panels of the same base station 110), the interface can have less latency and / or higher capacity, while when the TRPs 405 are located at different base stations 110, the interface can have greater latency and / or lower capacity (compared to co-location). Different TRPs 405 can communicate with the UE 410 using different QCL relationships (e.g., different TCI states), different demodulation reference signal (DMRS) ports, different layers (e.g., multi-layer communication), etc.

[0061] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0062] Figure 5is a diagram illustrating an example of multi-panel simultaneous uplink transmission according to various aspects of the present disclosure. Specifically, reference numeral 505 shows a spatial division multiplexing (SDM) of a first physical uplink shared channel (PUSCH) transmission 510 (shown as PUSCH 1) and a second PUSCH transmission 515 (shown as PUSCH 2). In SDM, the UE may transmit the first PUSCH transmission 510 and the second PUSCH transmission 515 in the same time and frequency resources (e.g., scheduled by a single DCI). In some cases, SDM may be used to improve spectral efficiency and / or improve reliability.

[0063] As indicated by reference numeral 520, the UE may transmit a first PUSCH transmission 510 using a first antenna panel of the UE and a second PUSCH transmission 515 using a second antenna panel of the UE. An antenna panel may refer to an antenna port group. In some aspects, the UE may form a first beam on a first antenna panel using a first precoding to precode the first PUSCH 510 and form a second beam on a second antenna panel using a second precoding to precode the second PUSCH 515. The beam may be an analog beam, which may be indicated by an uplink transmission configuration indicator (TCI) state or spatial relationship information (such as a channel state information reference signal (CSI-RS) identifier, a sounding reference signal (SRS) identifier, or a synchronization signal block (SSB) identifier). In some cases, there may be no identifiers defined to explicitly indicate (e.g., in downlink control information (DCI)) the first antenna panel and the second antenna panel. The UE may transmit a first PUSCH transmission 510 (e.g., using a first antenna panel) to a first TRP (e.g., TRP 335, TRP A 405, etc.) and a second PUSCH transmission 515 (e.g., using a second antenna panel) to a second TRP (e.g., TRP 335, TRP B 405, etc.). The first TRP and the second TRP may be located at the same base station or at different base stations.

[0064] In some cases, a base station may transmit a DCI that provides a precoder indication for an uplink transmission of a UE. For example, for a single-panel, non-codebook uplink MIMO transmission of a UE, the DCI may provide a single precoder indication that the UE may use to determine the precoding for the uplink transmission. However, wireless networks generally lack support for techniques for signaling, configuring, or otherwise indicating precoding for multi-panel, non-codebook uplink MIMO transmissions. In addition, using multiple precoder indications in a DCI (e.g., a corresponding precoder indication for each antenna panel) may be inefficient, may increase the size of the DCI, may result in excessive signaling overhead, etc.

[0065] Some techniques and devices described herein use a single precoder indication (e.g., in a DCI) to indicate precoding for multi-panel, non-codebook uplink MIMO transmissions. In some aspects, a single precoder indication may indicate a precoder across multiple antenna panels. In this way, a single precoder indication may be used to indicate multiple precoders for multiple antenna panels, thereby improving signaling efficiency, reducing signaling overhead, etc.

[0066] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0067] Figures 6A-6C 6 is a diagram illustrating one or more examples 600 associated with precoder indication for non-codebook based uplink transmissions (eg, MIMO transmissions) in accordance with various aspects of the present disclosure. Figures 6A-6C As shown in , example 600 includes a base station 110 and a UE 120. In some aspects, the base station 110 may include a first TRP (e.g., TRP 335, TRP A 405, etc.) and a second TRP (e.g., TRP 335, TRP B 405, etc.). In some aspects, the base station 110 may correspond to the TRPs (e.g., TRP 335, TRP A 405, TRP B 405, etc.). In some aspects, the first TRP may be associated with the first base station 110, and the second TRP may be associated with the second base station 110. In some aspects, the UE 120 may include multiple antenna panels (e.g., a first antenna panel and a second antenna panel). In some aspects, the UE 120 may correspond to the UE 410, etc.

[0068] like Fig. 6A In the embodiment and as indicated by reference numeral 605, the base station 110 may transmit, and the UE 120 may receive, one or more sounding reference signal (SRS) resource configurations and / or one or more SRS resource set configurations (e.g., for non-codebook based MIMO transmissions of the UE 120). In some aspects, the UE 120 may receive a configuration of SRS resources indicating beams for the SRS resources. In some aspects, the SRS resources may be configured for non-codebook use.

[0069] In some aspects, the SRS resource may be configured to have one or more SRS ports. In some cases, the SRS port may be referred to as an SRS antenna port. For example, as shown by reference numeral 610, the SRS resource may be configured to have one or more first SRS ports associated with a first SRS port group (e.g., port 0 and port 1), and one or more second SRS ports associated with a second SRS port group (e.g., port 2 and port 3). In this case, one or more first SRS ports in the first SRS port group may be configured to have a first beam, and one or more second SRS ports in the second SRS port group may be configured to have a second beam. The beam may be an analog beam, which may be indicated by an uplink TCI state or spatial relationship information (such as a CSI-RS identifier, an SRS identifier, or an SSB identifier). In addition, each SRS port may use a corresponding precoder (e.g., an SRS port may be independently precoded). For example, port 0 may use precoder 0, port 1 may use predecoder 1, port 2 may use precoder 2, and port 3 may use predecoder 3.

[0070] In some aspects, UE 120 may receive a configuration for an SRS resource set indicating one or more SRS resources for the SRS resource set. In some aspects, an SRS resource set may be configured for non-codebook use.

[0071] In some aspects, as shown in reference numeral 615, UE 120 may be configured with an SRS resource set including a first SRS resource (e.g., SRS 0 and SRS 1) configured with a first beam and a second SRS resource (e.g., SRS 2 and SRS 3) configured with a second beam. The beam may be an analog beam, which may be indicated by an uplink TCI state or spatial relationship information (such as a CSI-RS identifier, an SRS identifier, or an SSB identifier). In addition, each SRS resource may use a corresponding precoder (e.g., the SRS resources may be independently precoded). For example, SRS 0 may use precoder 0, SRS 1 may use predecoder 1, SRS 2 may use precoder 2, and SRS 3 may use predecoder 3. In some aspects, the SRS resources in the SRS resource set may have only a single SRS antenna port.

[0072] In some aspects, as shown in reference numeral 620, UE 120 may be configured to have a first SRS resource set and a second SRS resource set, the first SRS resource set including a first SRS resource configured to have a first beam (e.g., SRS 0 and SRS 1 in the first SRS resource set), and the second SRS resource set including a second SRS resource configured to have a second beam (e.g., SRS 0 and SRS 1 in the second SRS resource set). The beam may be an analog beam, which may be indicated by an uplink TCI state or spatial relationship information (such as a CSI-RS identifier, an SRS identifier, or an SSB identifier). In addition, each SRS resource may use a corresponding precoder (e.g., the SRS resources may be precoded independently). For example, SRS 0 of the first SRS resource set may use precoder 0, SRS 1 of the first SRS resource set may use precoder 1, SRS 0 of the second SRS resource set may use precoder 2, and SRS 1 of the second SRS resource set may use precoder 3. In some aspects, the SRS resources in the first set of SRS resources and the second set of SRS resources may have only a single SRS antenna port.

[0073] like Fig. 6A As further shown in FIG. 1 , UE 120 may be configured to support cross-panel precoder indexing (e.g., to support a single precoder indication for multiple antenna panels, as described below). Based on the cross-panel precoder indexing, the SRS resource sets, SRS resources, SRS ports, and / or PUSCH antenna ports indicated for UE 120 may be indexed across multiple antenna panels. In this manner, as described below, a single precoder indication may be used for multiple antenna panels, rather than using a respective precoder indication for each antenna panel.

[0074] As an example, a first SRS resource using a first precoder (e.g., SRS 0 in the SRS resource set shown by reference numeral 615, SRS 0 in the first SRS resource set shown by reference numeral 620, etc.) or a first SRS port (e.g., SRS port 0 shown by reference numeral 610, etc.) may be associated with a first SRS resource indicator (SRI) 0 (or another precoder indicator); a second SRS resource using a second precoder (e.g., SRS1 in the SRS resource set shown by reference numeral 615, SRS 1 in the first SRS resource set shown by reference numeral 620, etc.) or a second SRS port (e.g., SRS port 1 shown by reference numeral 610, etc.) may be associated with a second SRI 1; a third SRS resource using a third precoder (e.g., SRS2 in the SRS resource set shown by reference numeral 615, SRS 1 in the second SRS resource set shown by reference numeral 620, etc.) 0, etc.) or a third SRS port (e.g., SRS port 2 shown by reference numeral 610, etc.) may be associated with a third SRI 2; and a fourth SRS resource using a fourth precoder (e.g., SRS3 in the SRS resource set shown by reference numeral 615, SRS 1 in the second SRS resource set shown by reference numeral 620, etc.) or a fourth SRS port (e.g., SRS port 3 shown by reference numeral 610, etc.) may be associated with a fourth SRI 3. Continuing with the previous example, the SRS resources or SRS ports associated with the first SRI and the second SRI (SRI0 and SRI 1) may be associated with the first antenna panel of UE 120, and the SRS resources or SRS ports associated with the third SRI and the fourth SRI (SRI 2 and SRI 3) may be associated with the second antenna panel of UE 120. In addition, the first SRI and the second SRI may be respectively associated with the first PUSCH antenna port (PUSCH ant.0) and the second PUSCH antenna port (PUSCH ant.1) associated with the first antenna panel of UE 120, and the third SRI and the fourth SRI may be respectively associated with the third PUSCH antenna port (PUSCH ant.2) and the fourth PUSCH antenna port (PUSCH ant.3) associated with the second antenna panel of UE 120.

[0075] like Figure 6B 1 and indicated by reference numeral 625, base station 110 may transmit DCI and UE 120 may receive the DCI. The DCI may schedule uplink transmissions (e.g., multi-panel uplink transmissions or single-panel uplink transmissions) for UE 120. In some aspects, the DCI may include a single precoder indication (e.g., for multi-panel uplink transmissions or single-panel uplink transmissions).

[0076] A single precoder indication may be associated with non-codebook usage. In other words, a single precoder indication may be used for non-codebook based MIMO transmissions of UE 120. Accordingly, the DCI may indicate a single precoder indication in an SRI field of the DCI. For example, the single precoder indication may be an SRI index value that indicates one or more SRI values ​​according to a mapping. As an example, in mapping 630, an SRI index value of 5 is mapped to an SRI value of 0 and an SRI value of 2.

[0077] Thus, a single precoder indication may indicate multiple (e.g., two) layers for PUSCH transmission (where the number of layers is equal to the number of SRI values ​​indicated by the single precoder indication), and the precoders used to precode the multiple layers are indicated by the SRI values, respectively. For example, the single precoder indication may be an SRI index value of 5, which indicates two layers using precoders indicated by SRI values ​​0 and 2, respectively. In this example, the precoder used to precode the SRS resource or SRS port identified by the SRI value 0 (e.g., SRS 0 in the SRS resource set shown by reference numeral 615, SRS 0 in the first SRS resource set shown by reference numeral 620, SRS port 0 shown by reference numeral 610, etc.) is also used to precode the first layer, and the precoder used to precode the SRS resource or SRS port identified by the SRI value 2 (e.g., SRS 2 in the SRS resource set shown by reference numeral 615, SRS 0 in the second SRS resource set shown by reference numeral 620, SRS port 2 shown by reference numeral 610, etc.) is used to precode the second layer. In addition, a single precoder indication (e.g., an SRI index value) may also indicate PUSCH antenna ports to be used to transmit multiple layers (e.g., the PUSCH antenna ports associated with the SRI value are used to transmit the layers indicated by the SRI value). For instance, continuing with the above example, the first layer is transmitted using PUSCH antenna port 0 associated with SRI value 0, while the second layer is transmitted using PUSCH antenna port 2 associated with SRI value 2.

[0078] As described below, a single precoder indication may be used to indicate multiple sub-precoder indications so that mapping 630 may be used for multi-panel based uplink MIMO. In this way, UE 120 may save memory resources, storage resources, etc. that would otherwise be used to store multiple mappings.

[0079] In some aspects, the DCI may include a DMRS indication. For example, the DMRS indication may be a DMRS index value indicating (e.g., according to a mapping) one or more DMRS ports to be used for uplink transmission of the UE 120. As an example, a DMRS index value of 1 may be mapped to DMRS ports 0-2 according to a mapping. In some aspects, the indicated DMRS ports may be associated with multiple code division multiplexing (CDM) groups (e.g., for multi-panel uplink transmission). The UE 120 may be configured to have one or more mappings of DMRS ports to CDM groups (e.g., a first mapping of DMRS configuration type 1, a second mapping of DMRS configuration category 2, etc., according to 3GPP NR Release 15 or Release 16) (e.g., to determine the association of DMRS ports with CDM groups (up to three CDM groups)). For example, DMRS port 0 may be mapped to CDM group 0, DMRS port 1 may be mapped to CDM group 0, DMRS port 2 may be mapped to CDM group 1, and DMRS port 3 may be mapped to CDM group 1, etc. (e.g., for DMRS configuration type 2). Each indicated DMRS port may be used as a DMRS for a layer in a PUSCH transmission precoded by the precoder.

[0080] In some aspects, a new DMRS entry may be defined for multi-panel uplink transmission. The new DMRS entry may include a DMRS index value indicating (e.g., mapping to) DMRS ports 0, 2, and 3. The new DMRS entry may support multi-panel uplink transmission when DMRS port 0 is associated with a first CDM group (e.g., CDM group 0) and DMRS ports 2 and 3 are associated with a second CDM group (e.g., CDM group 1).

[0081] like Figure 6C In and as indicated by reference numeral 635, UE 120 may determine whether the DCI schedules a single-panel uplink transmission or a multi-panel uplink transmission. For example, UE 120 may determine whether the DCI schedules a single-panel uplink transmission or a multi-panel uplink transmission based at least in part on a single precoder indication (e.g., an SRI index value) of the DCI. In some aspects, UE 120 may determine whether the DCI schedules a single-panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more SRI values ​​associated with SRS resources configured to have the same beam (e.g., in the same SRS resource set as shown in reference numeral 615, or in different SRS resource sets as shown in reference numeral 620) and / or one or more SRS ports configured to have the same beam (e.g., configured for SRS resources as shown in reference numeral 610). In other words, when only a single beam is associated with the indicated SRS resource or SRS port, the single precoder indication indicates a single-panel uplink transmission.

[0082] In some aspects, the UE 120 may determine that the DCI schedules a multi-panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more SRS resources configured with different beams (e.g., in the same SRS resource set as shown in reference numeral 615, or in different SRS resource sets as shown in reference numeral 620) and / or one or more SRS ports configured with different beams (e.g., configured for SRS resources as shown in reference numeral 610). In other words, when multiple beams are associated with the indicated SRS resources or SRS ports, the single precoder indication indicates a multi-panel uplink transmission. As shown in mapping 630 ( Figure 6B ), SRI index values ​​5-8 and 10-14 (shown in shading) indicate multi-panel uplink transmissions (e.g., because these SRI index values ​​indicate SRI values ​​associated with different beams or different antenna panels, as described above in conjunction with Fig. 6A described).

[0083] For example, when a single precoder indication indicates one or more first SRS resources configured with a first beam in an SRS resource set and one or more second SRS resources configured with a second beam in the same SRS resource set (e.g., as shown in reference numeral 615), multi-panel uplink transmission is indicated. As another example, when a single precoder indication indicates one or more first SRS resources configured with a first beam in a first SRS resource set and one or more second SRS resources configured with a second beam in a second, different SRS resource set (e.g., as shown in reference numeral 620), multi-panel uplink transmission is indicated. As another example, when a single precoder indication indicates one or more first SRS ports configured with a first beam in an SRS resource and one or more second SRS ports configured with a second beam in the same SRS resource (e.g., as shown in reference numeral 610), multi-panel uplink transmission is indicated.

[0084] In the case of multi-panel uplink transmission, a single precoder indication may indicate a precoder across multiple antenna panel indexes of UE 120, as described above. In addition, in the case of multi-panel uplink transmission, UE 120 may determine that the single precoder indication indicates a first sub-precoder indication (e.g., for a first antenna panel of UE 120) and a second sub-precoder indication (e.g., for a second antenna panel of UE 120). That is, UE 120 may decouple the single precoder indication into the first sub-precoder indication and the second sub-precoder indication.

[0085] For example, a single precoder indication may be an SRI index value, and the SRI index may be mapped to multiple SRI values. Continuing with the previous example, a first set of multiple SRI values ​​may form a first sub-precoder (e.g., sub-SRI) indication, and a second set of multiple SRI values ​​may form a second sub-precoder (e.g., sub-SRI) indication. As an example, as shown in mapping 630 ( Figure 6B ), SRI index value 12 is mapped to SRI values ​​0, 2, and 3; SRI value 0 (mapped to the first antenna panel of UE 120, as described above) is the first sub-SRI indication; and SRI values ​​2 and 3 (mapped to the second antenna panel of UE 120, as described above) are the second sub-SRI indications.

[0086] Thus, the first sub-precoder indication indicates an SRS resource or SRS port that is configured to have a first beam and is associated with a first antenna panel of UE 120. Similarly, the second sub-precoder indication indicates an SRS resource or SRS port that is configured to have a second beam and is associated with a second antenna panel of UE 120. In addition, the precoder applied to precode the SRS resource or SRS port indicated by the sub-precoder indication is also used to precode the corresponding layer of the PUSCH to be transmitted on the antenna panel associated with the sub-precoder indication. In some aspects, the layer associated with the sub-precoder indication to be transmitted on the antenna panel may use the same beam as the SRS resource or SRS port associated with the sub-precoder indication.

[0087] In addition, UE 120 may determine a mapping of the layers indicated by the DCI to the DMRS ports. In some aspects, the indicated DMRS ports and the indicated layers (e.g., by the SRI index value in the DCI) may be mapped in order. For example, UE 120 may determine that the layers of the first PUSCH indicated by the first sub-precoder indication are mapped to the indicated DMRS ports in the first CDM group, and the second PUSCH layers indicated by the second sub-precoder indication are mapped to the DMRS ports indicated in the second CDM group. For example, if the DCI indicates SRI index values ​​mapped to SRI values ​​0, 2, and 3, and indicates DMRS ports 0, 2, and 3, UE 120 may determine that SRI value 0 (e.g., a first sub-precoder indication) is associated with DMRS port 0 for a first layer for a first PUSCH transmission (e.g., in CDM group 0), and determine that SRI values ​​2 and 3 (e.g., a second sub-precoder indication) are associated with DMRS ports 2 and 3 for a second layer and a third layer for a second PUSCH transmission (e.g., in CDM group 1). The first PUSCH transmission and the second PUSCH transmission may be transmitted by a first antenna panel and a second antenna panel, respectively.

[0088] UE 120 may transmit, and base station 110 may receive, an uplink transmission (e.g., in accordance with the DCI), as indicated by reference numeral 640. For example, UE 120 may transmit the uplink transmission based at least in part on determining whether the single precoder indication of the DCI indicates a single-panel uplink transmission or a multi-panel uplink transmission.

[0089] In some aspects, as described above, UE 120 may determine that the DCI indicates a multi-panel uplink transmission, and UE 120 may transmit the multi-panel uplink transmission based at least in part on the DCI (e.g., according to the precoding indicated by the single precoder indication, using the indicated DMRS port, etc.). In this case, UE 120 may perform simultaneous uplink transmissions (e.g., using SDM) using multiple antenna panels and multiple beams (e.g., non-codebook based MIMO transmissions). For example, the UE may transmit a first PUSCH transmission on a first antenna panel using a first beam (e.g., using the precoding determined for the first antenna panel as described above), and transmit a second PUSCH transmission on a second antenna panel using a second beam (e.g., using the precoding determined for the second antenna panel as described above). In some aspects, UE 120 may transmit the first PUSCH transmission to a first TRP (e.g., associated with base station 110), and transmit the second PUSCH transmission to a second TRP (e.g., associated with the base station or another base station).

[0090] In some aspects, as described above, UE 120 may determine that the DCI indicates a single panel uplink transmission, and UE 120 may transmit the single panel uplink transmission based at least in part on the DCI. For example, UE 120 may perform an uplink transmission using a single antenna panel and a single beam.

[0091] As indicated above, Figures 6A-6C are provided as one or more examples. Other examples may differ from the reference Figures 6A-6C The content described.

[0092] Figure 7 is a diagram illustrating an example process 700, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 700 is an example of operations in which a UE (eg, UE 120, etc.) performs precoder indication for non-codebook based uplink transmissions.

[0093] like Figure 7As shown in , in some aspects, process 700 may include receiving a DCI indicating a single precoder indication associated with non-codebook usage from a base station (block 710). For example, the UE may (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) receive a DCI indicating a single precoder indication associated with non-codebook usage from a base station, as described above in conjunction with Figures 6A-6C as described.

[0094] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include transmitting to a base station the single antenna panel uplink transmission or the multiple antenna panel uplink transmission based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission (block 720). For example, the UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may transmit to a base station the single antenna panel uplink transmission or the multiple antenna panel uplink transmission based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission, as described above in conjunction with FIG. Figures 6A-6C as described.

[0095] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0096] In a first aspect, process 700 includes receiving a configuration for an SRS resource set, and the SRS resource set includes one or more first SRS resources configured with a first beam and one or more second SRS resources configured with a second beam.

[0097] In a second aspect, either alone or in combination with the first aspect, process 700 includes receiving a configuration for a first SRS resource set and a second SRS resource set, wherein the first SRS resource set includes one or more first SRS resources configured to have a first beam and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

[0098] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 700 includes receiving a configuration for an SRS resource, and the SRS resource includes one or more first SRS ports configured to have a first beam, and one or more second SRS ports configured to have a second beam.

[0099] In a fourth aspect, alone or in combination with one or more of the first to third aspects, a single precoder indication indicates multiple SRS resources or multiple SRS ports, and the multiple SRS resources or the multiple SRS ports are associated with corresponding precodings.

[0100] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, a single precoder indication indicates a precoder to be indexed across multiple antenna panels.

[0101] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, a single precoder is indicated in an SRI field of a DCI.

[0102] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the single precoder indication indicates a first sub-precoder indication for a first antenna panel, and a second sub-precoder indication for a second antenna panel.

[0103] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the single precoder indication is determined to indicate a single antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more SRS resources or one or more SRS ports configured to have the same beam.

[0104] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the single precoder indication is determined to indicate a multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in an SRS resource set configured to have a first beam and one or more second SRS resources in an SRS resource set configured to have a second beam.

[0105] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, one or more first SRS resources are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0106] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the single precoder indication indicating multi-panel uplink transmission is determined at least in part based on determining that the single precoder indication indicates one or more first SRS resources in a first SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam.

[0107] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, one or more first SRS resources are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0108] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the single precoder indication indicating a multi-panel uplink transmission is determined based at least in part on determining that the single precoder indication indicates one or more first SRS ports in the SRS resource are configured to have a first beam and one or more second SRS ports in the SRS resource are configured to have a second beam.

[0109] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, one or more first SRS ports are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0110] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0111] Figure 8 is a diagram illustrating an example process 800, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 800 is an example of operations in which a base station (eg, base station 110, etc.) performs precoder indication for non-codebook based uplink transmissions.

[0112] like Figure 8 As shown in , in some aspects, process 800 may include transmitting to the UE a DCI indicating a single precoder indication associated with non-codebook usage (block 810). For example, a base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may transmit to the UE a DCI indicating a single precoder indication associated with non-codebook usage, as described above in conjunction with Figures 6A-6C as described.

[0113] like Figure 8As further shown in FIG. 8 , in some aspects, process 800 may include receiving from a UE the single antenna panel uplink transmission or the multiple antenna panel uplink transmission based at least in part on whether the single precoder indication indicates the single antenna panel uplink transmission or the multiple antenna panel uplink transmission (block 820). For example, a base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may receive from a UE the single antenna panel uplink transmission or the multiple antenna panel uplink transmission based at least in part on whether the single precoder indication indicates the single antenna panel uplink transmission or the multiple antenna panel uplink transmission, as described above in conjunction with Figures 6A-6C as described.

[0114] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0115] In a first aspect, process 800 includes transmitting a configuration for an SRS resource set, and the SRS resource set includes one or more first SRS resources configured with a first beam and one or more second SRS resources configured with a second beam.

[0116] In a second aspect, either alone or in combination with the first aspect, process 800 includes transmitting a configuration for a first SRS resource set and a second SRS resource set, wherein the first SRS resource set includes one or more first SRS resources configured to have a first beam and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

[0117] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 800 includes transmitting a configuration for an SRS resource comprising one or more first SRS ports configured with a first beam and one or more second SRS ports configured with a second beam.

[0118] In a fourth aspect, alone or in combination with one or more of the first to third aspects, a single precoder indication indicates multiple SRS resources or multiple SRS ports, and the multiple SRS resources or the multiple SRS ports are associated with corresponding precodings.

[0119] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, a single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

[0120] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, a single precoder is indicated in an SRI field of a DCI.

[0121] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the single precoder indication indicates a first sub-precoder indication for a first antenna panel, and a second sub-precoder indication for a second antenna panel.

[0122] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the single precoder indication indicates a single antenna panel uplink transmission when the single precoder indication indicates one or more SRS resources or one or more SRS ports configured to have the same beam.

[0123] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, when a single precoder indication indicates one or more first SRS resources in an SRS resource set configured to have a first beam and one or more second SRS resources in an SRS resource set configured to have a second beam, the single precoder indication indicates multi-antenna panel uplink transmission.

[0124] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, one or more first SRS resources are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0125] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, when the single precoder indication indicates one or more first SRS resources in a first SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam, the single precoder indication indicates multi-panel uplink transmission.

[0126] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, one or more first SRS resources are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0127] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, when a single precoder indication indicates one or more first SRS ports in an SRS resource configured to have a first beam and one or more second SRS ports in an SRS resource configured to have a second beam, the single precoder indication indicates a multi-panel uplink transmission.

[0128] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, one or more first SRS ports are associated with a first antenna panel and one or more DMRS ports of a first CDM group, and one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

[0129] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 800. Additionally or alternatively, two or more blocks of process 800 may be executed in parallel.

[0130] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0131] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware, firmware, and / or hardware and software. As used herein, a processor is implemented with a combination of hardware, firmware, and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0132] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0133] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase quoting "at least one of" a column of items refers to any combination of these items, including a single member. As an 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 (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other sorting of a, b and c).

[0134] Elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A wireless communication method performed by a user equipment UE, comprising: receiving downlink control information DCI indicating a single precoder indication associated with non-codebook usage from a base station; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is transmitted to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

2. The method of claim 1, further comprising: receiving a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

3. The method of claim 1, further comprising: receiving a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

4. The method of claim 1, further comprising: receiving a configuration for a sounding reference signal SRS resource, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam. 5 . The method of claim 1 , wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

6. The method of claim 1, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

7. The method of claim 1, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

8. The method of claim 1, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

9. The method of claim 1, wherein the single precoder indication is determined to indicate the single antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

10. A method as claimed in claim 1, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set are configured to have a first beam and one or more second SRS resources in the SRS resource set are configured to have a second beam.

11. The method of claim 10, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

12. A method as claimed in claim 1, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam.

13. The method of claim 12, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

14. A method as claimed in claim 1, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource are configured to have a first beam and one or more second SRS ports in the SRS resource are configured to have a second beam.

15. A method as claimed in claim 14, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

16. A wireless communication method performed by a base station, comprising: transmitting downlink control information DCI indicating a single precoder indication associated with non-codebook usage to a user equipment UE; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is received from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

17. The method of claim 16, further comprising: Transmitting a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

18. The method of claim 16, further comprising: transmitting a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

19. The method of claim 16, further comprising: Transmitting the configuration of the sounding reference signal SRS resources, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

20. The method of claim 16, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

21. The method of claim 16, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

22. The method of claim 16, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

23. The method of claim 16, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

24. The method of claim 16, wherein the single precoder indication indicates the single antenna panel uplink transmission when the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

25. The method of claim 16, wherein the single precoder indication indicates the multi-antenna panel uplink transmission when the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in the SRS resource set configured to have a second beam.

26. A method as claimed in claim 25, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

27. A method as claimed in claim 16, wherein when the single precoder indication indicates one or more first SRS resources in a first sounding reference signal (SRS) resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

28. A method as claimed in claim 27, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

29. The method of claim 16, wherein when the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource configured to have a first beam and one or more second SRS ports in the SRS resource configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

30. A method as claimed in claim 29, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

31. A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions, when executed by one or more processors of a user equipment UE, cause the UE to: receiving downlink control information DCI indicating a single precoder indication associated with non-codebook usage from a base station; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is transmitted to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

32. The non-transitory computer readable medium of claim 31 , wherein the one or more instructions further cause the UE to: receiving a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

33. The non-transitory computer readable medium of claim 31 , wherein the one or more instructions further cause the UE to: receiving a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

34. The non-transitory computer-readable medium of claim 31 , wherein the one or more instructions further cause the UE to: receiving a configuration for a sounding reference signal SRS resource, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

35. The non-transitory computer-readable medium of claim 31, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

36. The non-transitory computer-readable medium of claim 31, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

37. The non-transitory computer-readable medium of claim 31, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

38. The non-transitory computer readable medium of claim 31, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

39. A non-transitory computer-readable medium as described in claim 31, wherein the single precoder indication is determined to indicate the single antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

40. A non-transitory computer-readable medium as described in claim 31, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in the SRS resource set configured to have a second beam.

41. A non-transitory computer-readable medium as described in claim 40, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

42. A non-transitory computer-readable medium as described in claim 31, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam.

43. A non-transitory computer-readable medium as described in claim 42, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

44. A non-transitory computer-readable medium as described in claim 31, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS ports in a sounding reference signal (SRS) resource configured to have a first beam and one or more second SRS ports in the SRS resource configured to have a second beam.

45. A non-transitory computer-readable medium as described in claim 44, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

46. ​​A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising: One or more instructions that, when executed by one or more processors of a base station, cause the base station to: transmitting downlink control information DCI indicating a single precoder indication associated with non-codebook usage to a user equipment UE; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is received from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

47. The non-transitory computer readable medium of claim 46, wherein the one or more instructions further cause the base station to: Transmitting a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

48. The non-transitory computer readable medium of claim 46, wherein the one or more instructions further cause the base station to: transmitting a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

49. The non-transitory computer readable medium of claim 46, wherein the one or more instructions further cause the base station to: Transmitting the configuration of the sounding reference signal SRS resources, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

50. The non-transitory computer-readable medium of claim 46, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

51. The non-transitory computer readable medium of claim 46, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

52. The non-transitory computer readable medium of claim 46, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

53. The non-transitory computer readable medium of claim 46, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

54. The non-transitory computer-readable medium of claim 46, wherein the single precoder indication indicates the single antenna panel uplink transmission when the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

55. A non-transitory computer-readable medium as described in claim 46, wherein when the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in the SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

56. A non-transitory computer-readable medium as described in claim 55, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

57. A non-transitory computer-readable medium as described in claim 46, wherein when the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

58. A non-transitory computer-readable medium as described in claim 57, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

59. A non-transitory computer-readable medium as described in claim 46, wherein when the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource configured to have a first beam and one or more second SRS ports in the SRS resource configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

60. A non-transitory computer-readable medium as described in claim 59, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

61. 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: receiving downlink control information DCI indicating a single precoder indication associated with non-codebook usage from a base station; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is transmitted to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

62. The UE of claim 61, wherein the one or more processors are further configured to: receiving a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

63. The UE of claim 61, wherein the one or more processors are further configured to: receiving a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

64. The UE of claim 61, wherein the one or more processors are further configured to: receiving a configuration for a sounding reference signal SRS resource, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

65. The UE of claim 61, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

66. The UE of claim 61, wherein the single precoder indication indicates a precoder to be indexed across a multiple antenna panel.

67. The UE of claim 61, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

68. The UE of claim 61, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

69. A UE as described in claim 61, wherein the single precoder indication is determined to indicate the single antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

70. A UE as described in claim 61, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set are configured to have a first beam and one or more second SRS resources in the SRS resource set are configured to have a second beam.

71. A UE as described in claim 70, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

72. A UE as described in claim 61, wherein the single precoder indication indicating the multi-antenna panel uplink transmission is determined at least in part based on determining that the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam.

73. A UE as described in claim 72, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

74. A UE as described in claim 61, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource are configured to have a first beam and one or more second SRS ports in the SRS resource are configured to have a second beam.

75. A UE as described in claim 74, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

76. A base station 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: transmitting downlink control information DCI indicating a single precoder indication associated with non-codebook usage to a user equipment UE; as well as The single antenna panel uplink transmission or the multiple antenna panel uplink transmission is received from the UE based at least in part on whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

77. The base station of claim 76, wherein the one or more processors are further configured to: Transmitting a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

78. The base station of claim 76, wherein the one or more processors are further configured to: transmitting a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

79. The base station of claim 76, wherein the one or more processors are further configured to: Transmitting the configuration of the sounding reference signal SRS resources, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

80. The base station of claim 76, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

81. The base station of claim 76, wherein the single precoder indication indicates a precoder to be indexed across a multiple antenna panel.

82. The base station of claim 76, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

83. The base station of claim 76, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

84. The base station of claim 76, wherein the single precoder indication indicates the single antenna panel uplink transmission when the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

85. A base station as claimed in claim 76, wherein when the single precoder indication indicates one or more first SRS resources in the sounding reference signal SRS resource set configured with a first beam and one or more second SRS resources in the SRS resource set configured with a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

86. A base station as described in claim 85, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

87. A base station as described in claim 76, wherein when the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

88. A base station as described in claim 87, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

89. A base station as described in claim 76, wherein when the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource configured to have a first beam and one or more second SRS ports in the SRS resource configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

90. A base station as described in claim 89, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

91. A device for wireless communication, comprising: means for receiving, from a base station, downlink control information (DCI) indicating a single precoder indication associated with non-codebook usage; as well as Means for transmitting the single antenna panel uplink transmission or the multiple antenna panel uplink transmission to the base station based at least in part on determining whether the single precoder indication indicates a single antenna panel uplink transmission or a multiple antenna panel uplink transmission.

92. The apparatus of claim 91, further comprising: means for receiving a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

93. The apparatus of claim 91, further comprising: means for receiving a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

94. The apparatus of claim 91, further comprising: means for receiving a configuration for a sounding reference signal SRS resource, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

95. The apparatus of claim 91, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

96. The apparatus of claim 91, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

97. The apparatus of claim 91, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

98. The apparatus of claim 91, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

99. An apparatus as described in claim 91, wherein the single precoder indication is determined to indicate the single antenna panel uplink transmission at least in part based on determining that the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have the same beam.

100. An apparatus as described in claim 91, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set are configured to have a first beam and one or more second SRS resources in the SRS resource set are configured to have a second beam.

101. An apparatus as described in claim 100, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

102. An apparatus as described in claim 91, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam.

103. An apparatus as described in claim 102, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

104. An apparatus as described in claim 91, wherein the single precoder indication is determined to indicate the multi-antenna panel uplink transmission based at least in part on determining that the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource are configured to have a first beam and one or more second SRS ports in the SRS resource are configured to have a second beam.

105. An apparatus as described in claim 104, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

106. A device for wireless communication, comprising: means for transmitting downlink control information DCI indicating a single precoder indication associated with non-codebook usage to a user equipment UE; as well as Means for receiving from the UE the single antenna panel uplink transmission or the multiple antenna panel uplink transmission based at least in part on whether the single precoder indication indicates the single antenna panel uplink transmission or the multiple antenna panel uplink transmission.

107. The apparatus of claim 106, further comprising: means for transmitting a configuration for a sounding reference signal SRS resource set, The SRS resource set includes one or more first SRS resources configured to have a first beam and one or more second SRS resources configured to have a second beam.

108. The apparatus of claim 106, further comprising: means for transmitting a configuration for a first sounding reference signal SRS resource set and a second SRS resource set, The first SRS resource set includes one or more first SRS resources configured to have a first beam, and the second SRS resource set includes one or more second SRS resources configured to have a second beam.

109. The apparatus of claim 106, further comprising: means for transmitting a configuration for sounding reference signal SRS resources, The SRS resources include one or more first SRS ports configured to have a first beam and one or more second SRS ports configured to have a second beam.

110. The apparatus of claim 106, wherein the single precoder indication indicates a plurality of sounding reference signal (SRS) resources or a plurality of SRS ports, and the plurality of SRS resources or the plurality of SRS ports are associated with corresponding precodings.

111. The apparatus of claim 106, wherein the single precoder indication indicates a precoder to be indexed across a multi-antenna panel.

112. The apparatus of claim 106, wherein the single precoder is indicated in a sounding reference signal resource indicator field of the DCI.

113. The apparatus of claim 106, wherein the single precoder indication indicates a first sub-precoder indication for a first antenna panel and a second sub-precoder indication for a second antenna panel.

114. The apparatus of claim 106, wherein the single precoder indication indicates the single antenna panel uplink transmission when the single precoder indication indicates one or more sounding reference signal (SRS) resources or one or more SRS ports configured to have a same beam.

115. An apparatus as described in claim 106, wherein when the single precoder indication indicates one or more first SRS resources in a sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in the SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

116. An apparatus as described in claim 115, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

117. An apparatus as described in claim 106, wherein when the single precoder indication indicates one or more first SRS resources in a first sounding reference signal SRS resource set configured to have a first beam and one or more second SRS resources in a second SRS resource set configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

118. An apparatus as described in claim 117, wherein the one or more first SRS resources are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS resources are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

119. An apparatus as described in claim 106, wherein when the single precoder indication indicates one or more first SRS ports in a sounding reference signal SRS resource configured to have a first beam and one or more second SRS ports in the SRS resource configured to have a second beam, the single precoder indication indicates the multi-antenna panel uplink transmission.

120. An apparatus as described in claim 119, wherein the one or more first SRS ports are associated with a first antenna panel and one or more demodulation reference signal (DMRS) ports of a first code division multiplexing (CDM) group, and the one or more second SRS ports are associated with a second antenna panel and one or more DMRS ports of a second CDM group.

Images