Sounding reference signal resource configuration

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a configuration of at least one set of sounding reference signal (SRS) resources including at least five SRS resources, or at least two sets of SRS resources including the at least five SRS resources in total, each SRS resource of the at least five SRS resources corresponding to an SRS port of the at least five SRS ports. The UE may receive information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources. The UE may transmit the uplink transmission based at least in part on the set of selected SRS resources. Numerous other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 661,519, entitled “SOUNDING REFERENCE SIGNAL RESOURCE CONFIGURATION,” filed on April 29, 2022, which is hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for sounding reference signal (SRS) resource configuration. Background Art

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

[0005] A wireless network may include one or more network nodes that support communications for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. A "downlink" (or "DL") refers to a communication link from a network node to a UE, and an "uplink" (or "UL") refers to a communication link from a UE to a network node. Some wireless networks may support device-to-device communications, such as via a local link (e.g., a sidelink (SL), a WiFi link, or a Bluetooth link).

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. The new radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink, CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, 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 increase, further improvements in LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include receiving a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The method may include receiving information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources. The method may include sending an uplink transmission based at least in part on the set of selected SRS resources.

[0008] Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include receiving or sending a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports. The method may include sending information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources.

[0009] Some aspects described herein relate to a UE for wireless communication. The user equipment may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The one or more processors may be configured to receive information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. The one or more processors may be configured to send an uplink transmission based at least in part on the group of selected SRS resources.

[0010] Some aspects described herein relate to a network node for wireless communication. The network node may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive or send a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The one or more processors may be configured to send information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a UE. The instruction set, when executed by one or more processors of the UE, can cause the UE to receive a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The instruction set, when executed by one or more processors of the UE, can cause the UE to receive information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. The instruction set, when executed by one or more processors of the UE, can cause the UE to send an uplink transmission based at least in part on the group of selected SRS resources.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a network node. The instruction set, when executed by one or more processors of the network node, can cause the network node to receive or send a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports. The instruction set, when executed by one or more processors of the network node, can cause the network node to send information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include a component for receiving a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The apparatus may include a component for receiving information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. The apparatus may include a component for sending an uplink transmission based at least in part on the group of selected SRS resources.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include a component for receiving or sending a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports. The apparatus may include a component for sending information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources.

[0015] Aspects collectively include methods, apparatus, systems, computer program products, non-transitory computer readable media, user equipment, base stations, wireless communication devices, network nodes and / or processing systems as fully described herein with reference to and as illustrated by the accompanying drawings.

[0016] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of protection 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 figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of the limitations of the claims.

[0017] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers). The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring 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 are therefore not to be considered as limiting the scope thereof, as the specification may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of a sounding reference signal (SRS) resource set according to the present disclosure.

[0022] Figure 4 is a diagram illustrating an example of signaling associated with SRS resource configuration for supporting non-codebook uplink transmission according to the present disclosure.

[0023] Figure 5 and Figure 6 is a diagram illustrating an example of at least one SRS resource set according to the present disclosure.

[0024] Figure 7 is a diagram illustrating an example process performed, for example, by a UE according to the present disclosure.

[0025] Figure 8 is a diagram illustrating an example process, for example, performed by a network node, according to the present disclosure.

[0026] Fig. 9 is a diagram of an example apparatus for wireless communications according to the present disclosure.

[0027] Fig.10 is a diagram of an example apparatus for wireless communications according to the present disclosure. 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 embodied in many different forms, and should not be interpreted as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. It should be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functionality, or structure and functionality other than the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied 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 may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0030] Although various aspects may be described herein using terms generally associated with 5G or new radio (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 post-5G RATs (e.g., 6G).

[0031] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long Term Evolution (LTE)) network, as well as other examples. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), a user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. As shown, the network node 110 may include one or more network nodes. For example, the network node 110 may be an aggregated network node, which means that the aggregated network node is configured to utilize a radio protocol stack physically or logically integrated within a single RAN node (e.g., within a single device or unit). As another example, the network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network node 110 includes two or more non-co-located network nodes. A decomposed network node may be configured to utilize a protocol stack that is physically or logically distributed between two or more nodes, such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs).

[0032] In some examples, the network node 110 includes an entity, such as an RU, that communicates with the UE 120 via a radio access link. In some examples, the network node 110 includes an entity, such as a DU, that communicates with other network nodes 110 via a fronthaul link or a midhaul link. In some examples, the network node 110 includes an entity, such as a CU, that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link. In some aspects, the network node 110 (such as an aggregated network node 110 or a decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. The network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected to each other and / or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul, midhaul, or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0033] In some aspects, the network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to the coverage area of ​​a base station and / or a base station subsystem serving the coverage area, depending on the context in which the term is used. The network node 110 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 a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by a UE 120 associated with the femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A base station for a macro cell may be referred to as a macro base station. A base station for a pico cell may be referred to as a pico base station. A base station for a femto cell may be referred to as a femto base station or a home base station. In Figure 1 In the example shown, network node 110a may be a macro base station for macro cell 102a, network node 110b may be a pico base station for pico cell 102b, and network node 110c may be a femto base station for femto cell 102c. A base station may support one or more (eg, three) cells.

[0034] In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (eg, a mobile base station).

[0035] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and transmit transmissions of data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that can relay transmissions for other UEs 120 or network nodes 110. Figure 1 In the example shown, network node 110d (e.g., a relay base station) may communicate with network node 110a (e.g., a macro base station) and UE 120d to facilitate communication between network node 110a and UE 120d. A network node 110 that relays communications may be referred to as a relay station, relay base station, relay node, relay, etc.

[0036] The wireless network 100 may be a heterogeneous network including different types of network nodes 110, such as macro base stations, pico base stations, femto base stations, relay base stations, TRPs, RUs, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro base station may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico base station, a femto base station, and a relay base station may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0037] The network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for the network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul or midhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless or wired backhaul communication link. In some aspects, the network controller 130 may include a CU or a core network device.

[0038] UE 120 can be dispersed throughout the wireless network 100, and each UE 120 can be stationary or mobile. UE 120 can include, for example, access terminals, terminals, mobile stations and / or user units. UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node and / or any other suitable device configured to communicate via a wireless medium.

[0039] Some UEs 120 may be considered as machine type communication (MTC) UEs or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as user premises equipment. UE 120 may be included in a housing that houses components of UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the 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, and / or electrically coupled.

[0040] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (e.g., without using network node 110 as an intermediary to communicate with each other). 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, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0041] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. In a given geographic area, each frequency may support a single RAT to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0042] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency ranges designated FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). It should be understood that, although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “below 6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0043] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz–24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, so the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz–71GHz), FR4 (52.6GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands falls within the EHF band.

[0044] In view of the above examples, unless otherwise specifically stated, it should be understood that if the term "below 6 GHz" or the like is used herein, the term can be broadly referred to as a frequency that can be lower than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term can be broadly referred to as a frequency that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or can be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0045] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or components in a variety of ways. In a 5G NR system or network, a network node can be implemented in an aggregated or decomposed architecture. For example, a network node or one or more units (or one or more components) that perform network node functionality can be implemented as an aggregated network node (sometimes referred to as an independent base station or a monolithic base station) or a decomposed network node. "Network entity" or "network node" may refer to a decomposed network node, an aggregated network node, or one or more entities of a decomposed network node (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0046] In some aspects, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may also be implemented as a virtual unit (e.g., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU)).

[0047] Base station type operation or network design may take into account the aggregated nature of network node functionality. For example, a disaggregated network node may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A disaggregated network node may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design.

[0048] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may: receive a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; receive information indicating a set of selected SRS resources for uplink transmissions, the set of selected SRS resources including the at least five SRS resources; and send an uplink transmission based at least in part on the set of selected SRS resources. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0049] In some aspects, the network node 110 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may: receive or send a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; and send information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0050] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0051] Figure 2200 is a diagram illustrating an example of a network node 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. For example, some network nodes 110 may not include a radio frequency component. In some examples, one or more components illustrated as included in the network node 110 of example 200 may be implemented separately from the network node of example 200. For example, one or more RF components (eg, antenna 234, modem 232, TX MIMO processor 230, transmit processor 220, receive processor 238, or MIMO detector 236) may be implemented at a RU, and network node 110 may be a DU associated with the RU.

[0052] At the network node 110, a transmit processor 220 may receive data intended for a UE 120 (or a set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may further process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (eg, T downlink signals) via a corresponding set of antennas 234 (eg, T antennas) (shown as antennas 234a through 234t).

[0053] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0054] 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 network node 110 via the communication unit 294.

[0055] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or may be coupled to one or more transmit and / or receive components (such as, Figure 2 One or more antenna elements of one or more components in.

[0056] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 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 the functions described herein (eg, reference Figures 3 to 10 )Aspects of any of the methods described herein.

[0057] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component (shown as DEMOD) of the modem 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 network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communication and / or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform operations described herein (e.g., with reference to Figures 3 to 10 )Aspects of any of the methods described herein.

[0058] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in the network node 110 may perform one or more techniques associated with SRS transmission, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 7 The process of 700 Figure 8 800 and / or operations of other processes as described herein. Memory 242 and memory 282 may store data and program codes for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly, or after compilation, conversion, and / or interpretation), may cause the one or more processors, UE 120, and / or network node 110 to perform or direct, for example, Figure 7 The process of 700 Figure 8 The process 800 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0059] In some aspects, the UE 120 includes: means for receiving a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; means for receiving information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources; and / or means for sending an uplink transmission based at least in part on the set of selected SRS resources. The means for the UE 120 to perform the operations described herein may include, for example, one or more of the following: the communication manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0060] In some aspects, the network node 110 includes: means for receiving or sending a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of the at least five SRS ports; and / or means for sending information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources. In some aspects, the means for the network node 110 to perform operations described herein may include, for example, one or more of the following: the communication manager 150, the transmit processor 220, the TX MIMO processor 230, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246.

[0061] Although Figure 2 The blocks in the 2000 and 2010 are illustrated as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0062] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0063] Figure 3 is a diagram illustrating an example 300 of an SRS resource set according to the present disclosure.

[0064] The network node may configure the UE with one or more SRS resource sets to allocate resources for SRS transmission by the UE. For example, the configuration for the SRS resource set may be indicated in a radio resource control (RRC) message (e.g., an RRC configuration message or an RRC reconfiguration message). As indicated by reference numeral 305, the SRS resource set may include one or more SRS resources, which may include time resources and / or frequency resources (e.g., time slots, symbols, resource blocks, and / or periodicity for time resources).

[0065] As shown by reference numeral 310, the SRS resource may indicate one or more antenna ports on which the SRS is to be sent (e.g., in a time-frequency resource). Thus, the configuration for an SRS resource set may indicate one or more time-frequency resources in which the SRS is to be sent, and may indicate one or more antenna ports on which the SRS is to be sent in these time-frequency resources. Sending an SRS according to an SRS resource is referred to as probing an SRS resource. In some examples, when an SRS resource is associated with an SRS port, sending an SRS according to an SRS resource is referred to as probing an SRS port. In some examples, the configuration for an SRS resource set may indicate a use case for the SRS resource set (e.g., in an SRS-SetUse information element). In some examples, a use case is referred to as use. For example, an SRS resource set may have use cases for antenna switching, codebook, non-codebook, or beam management.

[0066] The antenna switching SRS resource set may be used to indicate downlink CSI with reciprocity between the uplink channel and the downlink channel. For example, when there is reciprocity between the uplink channel and the downlink channel, the network node may use the antenna switching SRS (e.g., an SRS sent using resources in the antenna switching SRS resource set) to obtain downlink CSI (e.g., to determine a downlink precoder to be used for communication with the UE).

[0067] When the network node indicates an uplink precoder to the UE, the codebook SRS resource set may be used to indicate uplink CSI. For example, when the network node is configured to indicate an uplink precoder to the UE (e.g., using a precoder codebook), the network node may use a codebook SRS (e.g., an SRS sent using resources in a codebook SRS resource set) to obtain uplink CSI (e.g., to determine an uplink precoder to be indicated to the UE and used by the UE to communicate with the network node). In some aspects, at least for the codebook SRS, a virtual port (e.g., a combination of two or more antenna ports) with maximum transmit power may be supported.

[0068] When the UE selects an uplink predecoder (e.g., rather than an uplink predecoder indicated by the network node to be used by the UE), a non-codebook SRS resource set may be used to determine the uplink CSI. For example, when the UE is configured to select an uplink predecoder, the network node may use a non-codebook SRS (e.g., an SRS sent using resources in a non-codebook SRS resource set) to obtain uplink CSI. In this case, a predecoder selected by the UE (e.g., the predecoder may be indicated to the network node) may be used to predecode the non-codebook SRS. The SRS resources of the non-codebook SRS resource set may be associated with an SRS port (e.g., one SRS port per SRS resource). The UE may use a different predecoder for each SRS port (and therefore each SRS resource). The UE may detect a pre-decoded SRS port, which means that the UE may send an SRS on an SRS resource configured with the SRS port using a predecoder associated with the SRS port. The network node may configure multiple SRS resources, each SRS resource having an SRS port (e.g., each SRS resource has a different SRS port). The network node may use one or more SRS ports to trigger transmission, and may perform estimates associated with these SRS ports sequentially in the time domain on the time / frequency resources associated with the corresponding SRS resources. The network node may select how many and which SRS ports should be used from the detected SRS ports to send non-codebook transmissions, such as a physical uplink shared channel (PUSCH). For example, the network node may select X SRS ports, where X is the rank of the non-codebook transmission. Thus, the network node may select one or more pre-decoders for non-codebook PUSCH transmissions based at least in part on a set of non-codebook SRS resources.

[0069] The SRS port (or corresponding SRS resource) may be mapped to one or more antenna ports (each antenna port corresponds to a physical antenna of the UE). Each antenna port (e.g., antenna) may have a row and a column of predecoder vectors. A signal for detecting an SRS resource configured with an SRS port may be initiated in baseband, processed according to the predecoder vector, and transmitted on the corresponding antenna port. Additional description of SRS transmission for non-codebook transmission is provided below.

[0070] The beam-managed SRS resource set may be used to indicate CSI for millimeter wave communications.

[0071] SRS resources may be configured as periodic, semi-persistent (sometimes referred to as semi-persistent scheduling (SPS), or aperiodic. Periodic SRS resources may be configured via a configuration message indicating the periodicity of the SRS resources (e.g., slot-level periodicity, where the SRS resources occur every Y slots) and a slot offset. In some cases, a periodic SRS resource may always be activated and may not be dynamically activated or deactivated (e.g., may be activated for SRS transmission until the periodic SRS resource is deconfigured). Semi-persistent SRS resources may also be configured via a configuration message indicating the periodicity and slot offset for the semi-persistent SRS resource and may be dynamically activated and deactivated (e.g., using DCI or a medium access control (MAC) control element (CE) (MAC-CE)). Aperiodic SRS resources may be dynamically triggered, such as via DCI (e.g., UE-specific DCI or group-common DCI) or MAC-CE.

[0072] In some aspects, the UE may be configured with a mapping between an SRS port (e.g., an antenna port) and a corresponding SRS resource. The UE may send an SRS on a specific SRS resource using the SRS port indicated in the configuration. In some aspects, the SRS resource may span N adjacent symbols within a time slot (e.g., where N is equal to 1, 2, or 4). The UE may be configured with X SRS ports (e.g., where X≤4). In some aspects, each of the X SRS ports may be mapped to a corresponding symbol of the SRS resource and used to send the SRS in that symbol.

[0073] like Figure 3 As shown, in some aspects, different SRS resource sets (e.g., having different use cases) indicated to the UE may overlap (e.g., in time and / or frequency, such as in the same time slot). For example, as shown by reference numeral 315, a first SRS resource set (e.g., shown as SRS resource set 1) is shown as having an antenna switching use case. As shown, the example antenna switching SRS resource set includes a first SRS resource (shown as SRS resource A) and a second SRS resource (shown as SRS resource B). Therefore, antenna port 0 and antenna port 1 may be used to send antenna switching SRS in SRS resource A (e.g., a first time-frequency resource), and antenna port 2 and antenna port 3 may be used to send antenna switching SRS in SRS resource B (e.g., in a second time-frequency resource).

[0074] As shown by reference numeral 320, a second SRS resource set (e.g., shown as SRS resource set 2) may be a codebook use case. As shown, the example codebook SRS resource set includes only the first SRS resource (shown as SRS resource A). Therefore, antenna port 0 and antenna port 1 may be used to send codebook SRS in SRS resource A (e.g., the first time-frequency resource). In this case, the UE may not use antenna port 2 and antenna port 3 to send codebook SRS in SRS resource B (e.g., the second time-frequency resource).

[0075] The UE may use multiple transmit antennas (in other words, multiple antenna ports) to perform non-codebook uplink transmissions (such as non-codebook PUSCH transmissions). For example, the UE may use 4 transmit antennas for 4Tx non-codebook PUSCH transmissions. There are some situations (such as the UE communicating with or including customer premises equipment (CPE), fixed wireless access (FWA) nodes, vehicle nodes, or industrial equipment) where it may be beneficial to use more than 4 transmit antennas to perform non-codebook transmissions, such as to enable the UE to use more than 4 layers to transmit uplink communications. However, in some deployments, the SRS resource set used for non-codebook transmission (such as an SRS resource set configured with nonCodebook use) may be constrained to include at most 4 SRS resources (corresponding to 4 SRS ports and therefore corresponding to 4 pre-decoders). In addition, in some deployments, the UE may be configured with only a single SRS resource set for non-codebook transmission. If up to 4 SRS resources can be configured in the non-codebook transmission SRS resource set, the detection of the non-codebook transmission SRS resource set may not provide sufficient information to support non-codebook transmission using more than 4 layers. Therefore, the performance of non-codebook transmission using more than 4 layers is degraded and the throughput is reduced.

[0076] The technology described herein provides a configuration of at least one SRS resource set (e.g., a single SRS resource set or multiple SRS resource sets), the at least one SRS resource set including at least five SRS resources in total. For example, the at least one SRS resource set may be configured for non-codebook use. In some examples, a single SRS resource set includes at least five SRS resources. In some other examples, multiple SRS resource sets include at least five SRS resources in total (e.g., four SRS resources per SRS resource set, or different numbers of SRS resources per SRS resource set). Some of the technologies described herein provide signaling associated with an SRS resource indication for non-codebook transmission, such as signaling indicating a group of selected SRS resources in a single SRS resource set, or signaling indicating a corresponding group of selected SRS resources in multiple SRS resource sets. For example, some of the technologies described herein provide overhead reduction (e.g., reduction in the number of bits) for SRS resource indications associated with non-codebook transmission using more than 4 layers. In this way, channel detection for non-codebook transmission using more than 4 layers is supported, which improves performance and increases throughput.

[0077] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 The examples described are different.

[0078] Figure 4 4 is a diagram illustrating an example 400 of signaling associated with SRS resource configuration for supporting non-codebook uplink transmission according to the present disclosure. As shown, the example 400 includes a UE (eg, UE 120) and a network node (eg, one or more network nodes 110).

[0079] like Figure 4 And as shown by reference numeral 410, the network node may send configuration information to the UE. For example, the network node may send the configuration information, or the network node may cause another network node to send the configuration information. In some aspects, the network node may receive the configuration information. For example, the CU may provide the configuration information (or information indicating the configuration information) to the network node so that the network node may trigger SRS transmission or schedule uplink transmission accordingly.

[0080] As shown in the figure, the configuration information may include the configuration of at least one SRS resource set. In some aspects, the configuration may configure at least one SRS resource set with at least five SRS resources. For example, the configuration may configure a single SRS resource set with more than four SRS resources. Additionally or alternatively, the configuration may configure at least two SRS resource sets including at least five SRS resources in total. For example, the configuration may configure a first SRS resource set with a first number of SRS resources and a second SRS resource set with a second number of SRS resources. The at least one SRS resource set (e.g., a single SRS resource set or at least two SRS resource sets) may be configured with non-codebook purposes. Therefore, the network node may use a corresponding pre-decoder for pre-decoder selection to facilitate the detection of at least five SRS ports. In some examples, each SRS resource in at least five SRS resources may correspond to (e.g., be configured with) an SRS port (e.g., one SRS port per SRS resource and one SRS resource per SRS port), and each SRS resource may be associated with a different SRS port.

[0081] As shown by reference numeral 420, the UE may send one or more SRSs according to the configuration information. For example, the UE may send one or more SRSs according to at least five SRS resources. In such examples, the UE may perform pre-decoding of one or more SRSs using a set of pre-decoders associated with at least five SRS resources, and the UE may send one or more SRSs on antennas (e.g., antenna ports) of the UE as configured by the at least five SRS resources. In some aspects, the UE may send the one or more SRSs according to a trigger indication (e.g., a downlink control information (DCI) message, etc.), such as for non-periodic SRS transmission. For example, a node may send (or cause to be sent) a trigger indication. In some aspects, the UE may send one or more SRSs according to a configuration such as a semi-persistent configuration or a periodic configuration. In such examples, the transmission of one or more SRSs may be activated, such as by a configuration of a periodic configuration or a MAC-CE or DCI message that activates a semi-persistent configuration. For example, a network node may send a configuration, a MAC control element, or a DCI message (or may cause to be sent a configuration, a MAC control element, or a DCI message).

[0082] As indicated by reference numeral 430, the network node may perform measurements associated with at least five SRS resources (e.g., on time / frequency resources associated with at least five SRS resources). For example, the network node may estimate an uplink channel based at least in part on the at least five SRS resources. In some aspects, the network node may receive information based at least in part on the measurements associated with the at least five SRS resources. For example, the network node may receive such information from the RU.

[0083] As shown by reference numeral 440, the network node may select SRS resources for uplink transmission. For example, the network node may select a group of SRS resources. In some examples, the SRS resources selected by the group may include at least five SRS resources. For example, the network node may select the group of SRS resources to indicate a group of pre-decoders for non-codebook uplink transmission for the UE, and the non-codebook uplink transmission may include at least five layers. In some examples, the network node may select the group of SRS resources based at least in part on performing measurements. For example, the network node may select a group of SRS resources associated with the best measurement from all SRS resources detected by the UE.

[0084] As shown by reference numeral 450, the network node may send and the UE may receive information indicating the SRS resources selected by the group. For example, the information indicating the SRS resources selected by the group may indicate a group of SRS ports corresponding to the SRS resources selected by the group. In some aspects, the SRS resources selected by the group may include at least five SRS resources. In some aspects, the information indicating the SRS resources selected by the group may be used for uplink transmission. For example, the information indicating the SRS resources selected by the group may include scheduling information for non-codebook PUSCH transmission. If the non-codebook PUSCH transmission will include X layers (where X is an integer), the SRS resources selected by the group may include X SRS resources (e.g., one SRS resource per layer and therefore one pre-decoder).

[0085] In some aspects, the information indicating the set of selected SRS resources may include an SRS resource indicator (SRI) field. For example, the information indicating the set of selected SRS resources may be a DCI message sent on the PDCCH and including the SRI field. For example, if the UE is configured with a single SRS resource set including more than five SRS resources (e.g., Figure 5 ), the information indicating the selected SRS resource of the group may include a single SRI field indicating the selected SRS resource in the SRS resource set. In some aspects, the SRS resource set may include 8 SRS resources. If the SRS resource set includes 8 SRS resources, the total number of combinations of X SRS ports (corresponding to X SRS resources, as described above) is: in represents the number of combinations of X SRS ports that can be selected from the 8 SRS ports. Therefore, in this example, the total number of bits for the SRI field is equal to

[0086]

[0087] In some aspects, a UE is configured with multiple SRS resource sets (e.g., at least two SRS resource sets), such as Figure 6 As illustrated. In some examples, the UE is configured with a first SRS resource set and a second SRS resource set (e.g., both SRS resource sets are configured for non-codebook use). The first SRS resource set may include up to four SRS resources, and the second SRS resource set may include up to four SRS resources. If the UE is configured with multiple SRS resource sets for non-codebook use, the information indicating the selected SRS resources of the group may indicate the selected SRS resources from at least one of the first SRS resource set or the second SRS resource set. For example, the information indicating the selected SRS resources of the group may be a DCI message sent on the PDCCH and including a first SRI field and a second SRI field. The first SRI field may indicate one or more selected SRS resources (e.g., one or more selected SRS ports) in the first SRS resource set, and the second SRI field may indicate one or more selected SRS resources (e.g., one or more selected SRS ports) in the second SRS resource set. In some aspects, the first SRI field may indicate that there is no selected SRS resource in the first SRS resource set. In some aspects, the second SRI field may indicate that there are no selected SRS resources in the second set of SRS resources.

[0088] In some aspects, if there are X SRS resources in the set of selected SRS resources (collectively, across the first SRS resource set and the second SRS resource set), the first SRI field may indicate Y SRS resources out of the four SRS resources in the first SRS resource set, and the second SRI field may indicate XY SRS resources out of the four SRS resources in the first SRS resource set. Thus, the first SRI field may indicate an appropriate subset of the set of selected SRS resources (e.g., less than all of the set of selected SRS resources). The second SRI field may indicate the remainder of the set of selected SRS resources (in addition to the appropriate subset indicated by the first SRI field). In such an example, the total number of combinations of the X SRS resources (and therefore SRS ports) is It can use 8 bits (4 bits for the first SRI field and 4 bits for the second SRI field). Therefore, the flexibility of SRS resource selection is improved compared to an SRI field with a smaller bit width.

[0089] In some aspects, the network node may select the group of selected SRS ports so as to minimize the difference between a first number of selected SRS ports (indicated by Y above) of the first SRS resource set and a second number of selected SRS ports (indicated by XY above) of the second SRS resource set. For example, the network node may select the group of selected SRS ports so that the first number is equal to the second number or differs from the second number by one. In other words, the network node may select the group of selected SRS ports so that Y and XY are equal or differ from each other by at most one. Below, for different ranks of uplink transmissions, examples of SRS resource selection for the first SRS resource set and the second SRS resource set are represented as {Y, XY} so as to minimize the difference between the first number of selected SRS ports Y and the second number of selected SRS ports XY:

[0090] Rank 1: {1,0} or {0,1}

[0091] Rank 2: {1,1}

[0092] Rank 3: {1,2} or {2,1}

[0093] Rank 4: {2,2}

[0094] Rank 5: {2,3} or {3,2}

[0095] Rank 6: {3,3}

[0096] Rank 7: {4,3} or {3,4}

[0097] Rank 8: {4,4}

[0098] In this example, the total number of combinations of X SRS resources is It uses 8 bits with a joint SRI (eg, a first SRI and a second SRI) to indicate one of 181 potential combinations of X ports across two SRS resource sets. Thus, the number of potential combinations of ports is reduced, which reduces processing complexity.

[0099] In some aspects, the network node may select the group of selected SRS ports such that if a first number of selected SRS ports in a first SRS resource set differs from a second number of selected SRS ports in a second SRS resource set by one, the smaller number (of the first number and the second number) is predefined to be associated with a specific one of the first SRS resource set or the second SRS resource set. In some aspects, the network node may select the group of selected SRS ports such that an SRS resource set with a smaller set index is always associated with a smaller number of the first number and the second number (assuming that the first number and the second number are different from each other). In some aspects, the network node may select the group of selected SRS ports such that an SRS resource set with a smaller set index is always associated with a larger number of the first number and the second number (assuming that the first number and the second number are different from each other). Below, for different ranks of uplink transmission, examples of SRS resource selection for the first SRS resource set and the second SRS resource set are represented as {Y, XY}, such that the SRS resource set with a smaller set index (i.e., the first SRS resource set) is always associated with a number of selected SRS resources equal to or greater than the number of SRS resources with a smaller set index (i.e., the second SRS resource set):

[0100] Rank 1: {1,0}

[0101] Rank 2: {1,1}

[0102] Rank 3: {2,1}

[0103] Rank 4: {2,2}

[0104] Rank 5: {3,2}

[0105] Rank 6: {3,3}

[0106] Rank 7: {4,3}

[0107] Rank 8: {4,4}

[0108] In this example, the total number of combinations of X SRS resources is It uses 7 bits with a joint SRI (eg, a first SRI and a second SRI) to indicate one of 125 potential combinations of X ports across two SRS resource sets. Thus, the overhead associated with the SRI indication can be reduced from 8 bits to 7 bits.

[0109] As shown by reference numeral 460, the UE may send uplink transmissions based at least in part on the SRS resources selected by the group. For example, the UE may send non-codebook PUSCH communications based at least in part on the SRS resources selected by the group. The non-codebook PUSCH communications may have a number of layers equal to the number of SRS resources belonging to the group of selected SRS resources. The UE may pre-decode the uplink transmissions based on a set of pre-decoders associated with the group of selected SRS resources. In this way, the network node may configure one or more SRS resource sets that include a total of more than 4 SRS resources associated with non-codebook transmissions performed by the UE, which facilitates non-codebook transmissions using more than 4 layers.

[0110] As indicated above, Figure 4 are provided as examples. Other examples can be found in the Figure 4 The examples described are different.

[0111] Figure 5 and Figure 6 are diagrams illustrating examples 500 and 600 of at least one SRS resource set according to the present disclosure. Figure 5 Example 500 shows a single SRS resource set 510 configured with at least five SRS resources 520. Each SRS resource 520 is associated with a corresponding SRS port. As shown, each SRS resource 520 is associated with a different SRS port. A single SRS resource set 510 can be configured using RRC signaling. In some aspects, a single SRS resource set 510 can be configured using an SRS-ResourceSetRRC ​​configuration and can be associated with a set index. The set index is a numerical identifier of the SRS resource set. The SRS resource set 510 can indicate at least five SRS resources 520 based at least in part on an SRS resource identifier (e.g., an srs-ResourceId parameter) of the at least five SRS resources 520. A single SRS resource set 510 can be associated with non-codebook use.

[0112] Figure 6 Example 600 shows a first SRS resource set 610 - 1 and a second SRS resource set 610 - 2 . Figure 6 Each SRS resource set 610 includes four SRS resources 620. For example, Figure 6 Each SRS resource set 610 may be configured with up to four SRS resources 620, such that Figure 6The SRS resource set 610 includes a total of at least five SRS resources 620 configured. Each SRS resource 620 is associated with a corresponding SRS port. As shown, each SRS resource 620 is associated with a different SRS port. Each SRS resource set 610 can be configured using RRC signaling. In some aspects, the first SRS resource set 610-1 can be configured using an SRS-ResourceSet RRC configuration and can be associated with a first set index. The second SRS resource set 610-2 can be configured using another SRS-ResourceSet RRC configuration (separate from the SRS-ResourceSet RRC configuration for the first SRS resource set 610-1) and can be associated with a second set index. The SRS resource set 610 can collectively indicate at least five SRS resources 620 based at least in part on SRS resource identifiers (e.g., srs-ResourceId parameters) of the at least five SRS resources 620. The SRS resource set 610 can be associated with non-codebook use.

[0113] In some aspects, the SRS resource set 610 may be configured with more than four SRS resources for non-codebook use. For example, the network node may configure multiple SRS resource sets 610, and one or more of the SRS resource sets 610 may include more than four SRS resources 620.

[0114] As used herein, if an SRS resource set is configured with an identifier of the SRS resource, the SRS resource set includes the SRS resource.

[0115] As indicated above, Figure 5 and Figure 6 are provided as examples. Other examples can be found in the Figure 5 and Figure 6 The examples described are different.

[0116] Figure 7 700 is a diagram illustrating an example process 700 performed, for example, by a UE according to the present disclosure. Example process 700 is a UE (e.g., UE 120, Figures 4 to 6 An example of a UE) performing operations associated with SRS resource configuration.

[0117] like Figure 7 As shown, in some aspects, process 700 may include receiving a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each SRS resource of the at least five SRS resources corresponding to an SRS port of at least five SRS ports (block 710). For example, a UE (e.g., using Fig. 9The communication manager 140 and / or receiving component 902 depicted in the figure may receive a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including a total of at least five SRS resources, each of the at least five SRS resources corresponding to an SRS port among at least five SRS ports, as described above.

[0118] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include receiving information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources (block 720). For example, a UE (e.g., using communication manager 140 and / or receiving component 902, such as Fig. 9 As shown) can receive information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including at least five SRS resources, as described above.

[0119] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include sending an uplink transmission based at least in part on the set of selected SRS resources (block 730). For example, a UE (e.g., using Fig. 9 The communication manager 140 and / or transmitting component 904 depicted in FIG. 1 may send an uplink transmission based at least in part on the set of selected SRS resources, as described above.

[0120] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0121] In a first aspect, the at least one SRS resource set includes a single SRS resource set including at least five SRS resources.

[0122] In a second aspect, alone or in combination with the first aspect, an SRS resource indicator field of the information indicates a set of SRS ports corresponding to the set of selected SRS resources.

[0123] In a third aspect, alone or in combination with one or more of the first and second aspects, the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

[0124] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the first SRI field of the information indicates a proper subset of the SRS resources selected by the group, and wherein the second SRI field of the information indicates the remaining portion of the SRS resources selected by the group other than the proper subset of the SRS resources selected by the group.

[0125] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the appropriate subset comprises a first number of SRS resources and the remainder comprises a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one.

[0126] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first number is greater than or equal to the second number.

[0127] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the first number is less than or equal to the second number.

[0128] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the first SRS resource set includes up to four SRS resources, and the second SRS resource set includes up to four SRS resources.

[0129] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the uplink transmission is a non-codebook PUSCH transmission.

[0130] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

[0131] 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 blocks arranged in a different manner than those depicted in the process 700. Additionally or alternatively, two or more blocks of the blocks of process 700 may be performed in parallel.

[0132] Figure 8 800 is a diagram illustrating an example process 800 performed, for example, by a network node according to the present disclosure. The example process 800 is a diagram illustrating an example process 800 performed by a network node (e.g., network node 110, Figures 4 to 6 An example of a network node) performing operations associated with sounding reference signal resource configuration.

[0133] like Figure 8 As shown, in some aspects, process 800 may include receiving or sending a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each SRS resource of the at least five SRS resources corresponding to an SRS port of at least five SRS ports (block 810). For example, a network node (e.g., using Fig.10The communication manager 150 and / or receiving component 1002 depicted in the figure may receive or send a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including a total of the at least five SRS resources, each of the at least five SRS resources corresponding to an SRS port among the at least five SRS ports, as described above.

[0134] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include sending information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources (block 820). For example, a network node (e.g., using communication manager 150 and / or transmitting component 904, such as Fig. 9 As shown) can send information indicating a set of selected SRS resources for uplink transmission, including at least five SRS resources, as described above.

[0135] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0136] In a first aspect, the at least one SRS resource set comprises a single resource set, the single SRS resource set comprising at least five SRS resources.

[0137] In a second aspect, alone or in combination with the first aspect, an SRS resource indicator field of the information indicates a set of SRS ports corresponding to the set of selected SRS resources.

[0138] In a third aspect, alone or in combination with one or more of the first and second aspects, the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

[0139] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the first SRI field of the information indicates a proper subset of the SRS resources selected by the group, and wherein the second SRI field of the information indicates the remaining portion of the SRS resources selected by the group other than the proper subset of the SRS resources selected by the group.

[0140] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the appropriate subset comprises a first number of SRS resources and the remainder comprises a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one.

[0141] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first number is greater than or equal to the second number.

[0142] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the first number is less than or equal to the second number.

[0143] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the first SRS resource set includes up to four SRS resources, and the second SRS resource set includes up to four SRS resources.

[0144] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the uplink transmission is a non-codebook PUSCH transmission.

[0145] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

[0146] 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 blocks arranged in a different manner than those depicted in the process 800. Additionally or alternatively, two or more blocks of the blocks of process 800 may be performed in parallel.

[0147] Fig. 9 is a diagram of an example apparatus 900 for wireless communication according to the present disclosure. Apparatus 900 may be a UE, or a UE may include apparatus 900. In some aspects, apparatus 900 includes a receiving component 902 and a transmitting component 904 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using receiving component 902 and transmitting component 904. As further shown, apparatus 900 may include a communication manager 140. Communication manager 140 may include an SRS component 908, among other things.

[0148] In some aspects, the apparatus 900 may be configured to perform Figures 3 to 6 Additionally or alternatively, the apparatus 900 may be configured to perform one or more processes described herein (such as Figure 7 In some aspects, Fig. 9 The apparatus 900 and / or one or more components shown in FIG. 9 may include a combination of Figure 2 Additionally or alternatively, Fig. 9 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0149] The receiving component 902 may receive communications from the device 906, such as reference signals, control information, data communications, or combinations thereof. The receiving component 902 may provide the received communications to one or more other components of the device 900. In some aspects, the receiving component 902 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 900. In some aspects, the receiving component 902 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0150] The transmitting component 904 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 906. In some aspects, one or more other components of the device 900 may generate communications and may provide the generated communications to the transmitting component 904 for transmission to the device 906. In some aspects, the transmitting component 904 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 906. In some aspects, the transmitting component 904 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, the transmit component 904 can be co-located with the receive component 902 in a transceiver.

[0151] The receiving component 902 may receive a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port in at least five SRS ports. The receiving component 902 may receive information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. The sending component 904 may send an uplink transmission based at least in part on the group of selected SRS resources. The SRS component 908 may send one or more SRSs based at least in part on the at least five SRS resources.

[0152] Fig. 9 The number and arrangement of components shown are provided as examples. In practice, there may be Fig. 9 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig. 9 Two or more components shown may be implemented in a single component, or Fig. 9 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig. 9 The illustrated set (one or more) of components may be described as being executable by Fig. 9 Another group of components shown performs one or more functions.

[0153] Fig.10 1 is a diagram of an example apparatus 1000 for wireless communication according to the present disclosure. Apparatus 1000 may be a network node, or a network node may include apparatus 1000. In some aspects, apparatus 1000 includes a receiving component 1002 and a sending component 1004 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using receiving component 1002 and sending component 1004. As further shown, apparatus 1000 may include a communication manager 150. Communication manager 150 may include one or more of a configuration component 1008 or an estimation component 1010, among others.

[0154] In some aspects, the apparatus 1000 may be configured to perform Figures 3 to 6 Additionally or alternatively, the apparatus 1000 may be configured to perform one or more of the processes described herein (such as Figure 8 In some aspects, Fig.10 The device 1000 and / or one or more components shown may include a combination of Figure 2Additionally or alternatively, Fig.10 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0155] The receiving component 1002 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1006. The receiving component 1002 may provide the received communications to one or more other components of the device 1000. In some aspects, the receiving component 1002 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 1000. In some aspects, the receiving component 1002 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described network nodes. In some aspects, receiving component 1002 may include an interface with another network node, such as a radio unit.

[0156] The transmitting component 1004 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1006. In some aspects, one or more other components of the device 1000 may generate communications and may provide the generated communications to the transmitting component 1004 for transmission to the device 1006. In some aspects, the transmitting component 1004 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 1006. In some aspects, the transmitting component 1004 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described network nodes. In some aspects, the transmit component 1004 may be co-located in a transceiver with the receive component 1002. In some aspects, the transmit component 1004 may include an interface with another network node, such as a radio unit.

[0157] The receiving component 1002 or the configuring component 1008 may receive or send a configuration of at least one SRS resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports. The sending component 1004 may send information indicating a group of selected SRS resources for uplink transmission, the group of selected SRS resources including the at least five SRS resources. The estimating component 1010 may perform measurements associated with selecting the group of selected SRS resources.

[0158] Fig.10 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.10 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.10 Two or more components shown may be implemented in a single component, or Fig.10 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.10 The illustrated set (one or more) of components may be described as being executable by Fig.10 Another group of components shown performs one or more functions.

[0159] The following provides an overview of some aspects of the disclosure:

[0160] Aspect 1: A method of wireless communication performed by a user equipment (UE), the method comprising: receiving a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including a total of the at least five SRS resources, each of the at least five SRS resources corresponding to an SRS port among at least five SRS ports; receiving downlink control information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources; and sending the uplink transmission based at least in part on the set of selected SRS resources.

[0161] Aspect 2: The method according to aspect 1, wherein the at least one SRS resource set comprises a single SRS resource set, and the single SRS resource set comprises the at least five SRS resources.

[0162] Aspect 3: The method according to aspect 2, wherein the SRS resource indicator field of the downlink control information indicates a set of SRS ports corresponding to the set of selected SRS resources.

[0163] Aspect 4: The method according to aspect 1, wherein the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

[0164] Aspect 5: A method according to Aspect 4, wherein the first SRS resource indicator (SRI) field of the downlink control information indicates an appropriate subset of the set of selected SRS resources, and wherein the second SRI field of the downlink control information indicates the remaining portion of the set of selected SRS resources other than the appropriate subset of the set of selected SRS resources.

[0165] Aspect 6: The method according to aspect 5, wherein the appropriate subset includes a first number of SRS resources and the remaining part includes a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one.

[0166] Aspect 7: The method according to aspect 6, wherein the first number is greater than or equal to the second number.

[0167] Aspect 8: The method according to aspect 6, wherein the first number is less than or equal to the second number.

[0168] Aspect 9: The method according to aspect 4, wherein the first SRS resource set includes up to four SRS resources, and the second SRS resource set includes up to four SRS resources.

[0169] Aspect 10: The method according to any one of aspects 1 to 9, wherein the uplink transmission is a non-codebook physical uplink shared channel (PUSCH) transmission.

[0170] Aspect 11: The method according to any one of Aspects 1 to 10, wherein the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

[0171] Aspect 12: A method of wireless communication performed by a network node, the method comprising: receiving or sending a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including a total of the at least five SRS resources, each of the at least five SRS resources corresponding to an SRS port among at least five SRS ports; and sending downlink control information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources.

[0172] Aspect 13: The method according to Aspect 12, wherein the at least one SRS resource set comprises a single SRS resource set, and the single resource set comprises the at least five SRS resources.

[0173] Aspect 14: The method according to aspect 13, wherein the SRS resource indicator field of the downlink control information indicates a set of SRS ports corresponding to the set of selected SRS resources.

[0174] Aspect 15: The method according to Aspect 12, wherein the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

[0175] Aspect 16: A method according to Aspect 15, wherein the first SRS resource indicator (SRI) field of the downlink control information indicates an appropriate subset of the set of selected SRS resources, and wherein the second SRI field of the downlink control information indicates the remaining portion of the set of selected SRS resources other than the appropriate subset of the set of selected SRS resources.

[0176] Aspect 17: The method according to aspect 16, wherein the appropriate subset includes a first number of SRS resources and the remaining part includes a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one.

[0177] Aspect 18: The method according to aspect 17, wherein the first number is greater than or equal to the second number.

[0178] Aspect 19: The method according to aspect 17, wherein the first number is less than or equal to the second number.

[0179] Aspect 20: The method according to aspect 15, wherein the first SRS resource set includes up to four SRS resources, and the second SRS resource set includes up to four SRS resources.

[0180] Aspect 21: A method according to any one of aspects 12 to 20, wherein the uplink transmission is a non-codebook physical uplink shared channel (PUSCH) transmission.

[0181] Aspect 22: The method according to any one of Aspects 12 to 21, wherein the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

[0182] Aspect 23: An apparatus for performing wireless communications at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 1 to 22.

[0183] Aspect 24: A device for wireless communication, the device comprising: a memory; and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 1 to 22.

[0184] Aspect 25: An apparatus for wireless communication, the apparatus comprising: at least one means for performing the method according to one or more of aspects 1 to 22.

[0185] Aspect 26: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 22.

[0186] Aspect 27: 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 device, cause the device to perform one or more of the methods described in aspects 1 to 22.

[0187] 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 from practice of these aspects.

[0188] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, etc. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be apparent that the systems and / or methods described herein can be implemented by a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, there is no reference to a specific software code herein to describe the operation and behavior of the system and / or method, because those skilled in the art will understand that software and hardware can be designed to implement the system and / or method based at least in part on the description herein.

[0189] 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.

[0190] Although the specific combination of features is set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner that is not specifically set forth in the claims and / or is not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claims. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). As an example, "at least one of a, b or c" is intended to cover a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (for example, a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other ordering of a, b and c).

[0191] Any element, action or instruction used herein should not be interpreted as key or necessary, unless explicitly described as such. In addition, as used herein, the articles "one" and "an" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "said / the" is intended to include one or more projects connected with the article "said / the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more projects, and can be used interchangeably with "one or more". If you want to refer to only one project, use the phrase "only one" or similar terms. In addition, as used herein, the terms "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "elements with" A can also have B). In addition, the phrase "based on" is intended to represent "based at least in part", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended and used interchangeably with "and / or" unless expressly stated otherwise (eg, if used in conjunction with "either" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: Memory; and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to: Receiving a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; receiving downlink control information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources comprising the at least five SRS resources; as well as The uplink transmission is transmitted based at least in part on the set of selected SRS resources. 2 . The UE of claim 1 , wherein the downlink control information indicating the set of selected SRS resources comprises one or more SRS resource indicator fields identifying the set of selected SRS resources. 3 . The UE according to claim 1 , wherein the at least one SRS resource set comprises a single SRS resource set, and the single SRS resource set comprises the at least five SRS resources. 4 . The UE according to claim 3 , wherein an SRS resource indicator field of the downlink control information indicates a group of SRS ports corresponding to the group of selected SRS resources. The UE according to claim 1 , wherein the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

6. A UE according to claim 5, wherein a first SRS resource indicator (SRI) field of the downlink control information indicates an appropriate subset of the set of selected SRS resources, and wherein a second SRI field of the downlink control information indicates a remaining portion of the set of selected SRS resources other than the appropriate subset of the set of selected SRS resources. 7 . The UE of claim 6 , wherein the appropriate subset includes a first number of SRS resources and the remaining portion includes a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one. The UE according to claim 7 , wherein the first number is greater than or equal to the second number.

9. The UE of claim 7, wherein the first number is less than or equal to the second number. 10 . The UE of claim 5 , wherein the first SRS resource set includes up to four SRS resources, and the second SRS resource set includes up to four SRS resources.

11. The UE of claim 1 , wherein the uplink transmission is a non-codebook Physical Uplink Shared Channel (PUSCH) transmission. 12 . The UE according to claim 1 , wherein the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

13. A network node for wireless communication, the network node comprising: Memory; and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to: Receiving or sending a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; as well as Downlink control information is transmitted indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources.

14. The network node of claim 13, wherein the downlink control information indicating the set of selected SRS resources comprises one or more SRS resource indicator fields identifying the set of selected SRS resources.

15. The network node of claim 13, wherein the at least one SRS resource set comprises a single resource set including the at least five SRS resources. 16 . The network node according to claim 14 , wherein an SRS resource indicator field of the downlink control information indicates a set of SRS ports corresponding to the set of selected SRS resources.

17. The network node according to claim 13, wherein the at least two SRS resource sets include a first SRS resource set and a second SRS resource set.

18. A network node according to claim 17, wherein a first SRS resource indicator (SRI) field of the downlink control information indicates a suitable subset of the set of selected SRS resources, and wherein a second SRI field of the downlink control information indicates a remaining portion of the set of selected SRS resources other than the suitable subset of the set of selected SRS resources.

19. The network node of claim 18, wherein the appropriate subset comprises a first number of SRS resources and the remaining portion comprises a second number of SRS resources, wherein the first number is equal to the second number or differs from the second number by one.

20. The network node of claim 19, wherein the first number is greater than or equal to the second number.

21. The network node of claim 19, wherein the first number is less than or equal to the second number.

22. The network node of claim 17, wherein the first SRS resource set includes up to four SRS resources and the second SRS resource set includes up to four SRS resources.

23. The network node of claim 13, wherein the uplink transmission is a non-codebook Physical Uplink Shared Channel (PUSCH) transmission.

24. The network node of claim 13, wherein the at least one SRS resource set or the at least two SRS resource sets are associated with non-codebook usage.

25. A method of wireless communication performed by a user equipment (UE), the method comprising: Receiving a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; receiving downlink control information indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources comprising the at least five SRS resources; as well as The uplink transmission is transmitted based at least in part on the set of selected SRS resources.

26. The method of claim 25, wherein the downlink control information indicating the set of selected SRS resources comprises one or more SRS resource indicator fields identifying the set of selected SRS resources.

27. A method according to claim 25, wherein a first SRS resource indicator (SRI) field of the downlink control information indicates an appropriate subset of the set of selected SRS resources, and wherein a second SRI field of the downlink control information indicates a remaining portion of the set of selected SRS resources other than the appropriate subset of the set of selected SRS resources.

28. A method of wireless communication performed by a network node, the method comprising: Receiving or sending a configuration of at least one sounding reference signal (SRS) resource set including at least five SRS resources or at least two SRS resource sets including the at least five SRS resources in total, each of the at least five SRS resources corresponding to an SRS port of at least five SRS ports; as well as Downlink control information is transmitted indicating a set of selected SRS resources for uplink transmission, the set of selected SRS resources including the at least five SRS resources.

29. The method of claim 28, wherein the downlink control information indicating the set of selected SRS resources comprises one or more SRS resource indicator fields identifying the set of selected SRS resources.

30. A method according to claim 28, wherein a first SRS resource indicator (SRI) field of the downlink control information indicates an appropriate subset of the set of selected SRS resources, and wherein a second SRI field of the downlink control information indicates a remaining portion of the set of selected SRS resources other than the appropriate subset of the set of selected SRS resources.

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