Per-beam time domain basis selection for channel state information codebook

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive one or more channel state information (CSI) reference signals (CSI-RSs). The UE may transmit a CSI report associated with the one or more CSI-RSs, wherein the CSI report is associated with a beam-shared time domain (TD) base set selection and one or more per-beam TD base subset selections from the beam-shared TD base set selection. Numerous other aspects are described.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for per-beam time-domain basis selection for Doppler channel state information codebooks. Background Art

[0002] 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).

[0003] A wireless network may include one or more network nodes that support communications for wireless communication devices, such as a 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 side link (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, among other examples).

[0004] 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. 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 support beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink, using CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) on the uplink (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum and better integrate with other open standards, thereby better supporting mobile broadband Internet access. 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

[0005] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include receiving one or more channel state information (CSI) reference signals (CSI-RS). The method may include sending a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0006] Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include sending one or more CSI-RS. The method may include receiving a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0007] Some aspects described herein relate to a UE for wireless communication. The UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive one or more CSI-RS. The one or more processors may be configured to: send a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0008] 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 send one or more CSI-RS. The one or more processors may be configured to: receive a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0009] 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, may cause the UE to receive one or more CSI-RS. The instruction set, when executed by one or more processors of the UE, may cause the UE to send a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0010] 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, may cause the network node to send one or more CSI-RS. The instruction set, when executed by one or more processors of the network node, may cause the network node to receive a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0011] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving one or more CSI-RS. The apparatus may include means for sending a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0012] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting one or more CSI-RS. The apparatus may include means for receiving a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0013] The various aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to the drawings and description and as illustrated in the drawings and description.

[0014] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments 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 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 limitations to the claims.

[0015] 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

[0016] 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.

[0017] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0018] 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.

[0019] Figure 3 is a diagram illustrating an example decomposed base station architecture according to the present disclosure.

[0020] Figure 4 is a diagram illustrating an example of physical channels and reference signals in a wireless network according to the present disclosure.

[0021] FIG. 5A to FIG. 5E is a diagram illustrating an example set of codebook structures according to the present disclosure.

[0022] 6A to 6Fis a diagram illustrating a set of examples associated with per-beam time-domain basis selection for a Doppler channel state information (CSI) codebook according to the present disclosure.

[0023] Figure 7 is a diagram illustrating an example process performed, for example, by a UE according to the present disclosure.

[0024] Figure 8 is a diagram illustrating an example process, for example, performed by a network node, according to the present disclosure.

[0025] Fig. 9 is a diagram of an example apparatus for wireless communications according to the present disclosure.

[0026] Fig.10 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0027] 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 understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the 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 devices or methods implemented using other structures, functions, or structures and functions in addition to or different from the various aspects of the 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.

[0028] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] 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 applicable to other RATs, such as 3G RAT, 4G RAT, and / or post-5G RATs (e.g., 6G).

[0030] 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), one 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. The network node 110 is a network node that communicates with the UE 120. As shown in the figure, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (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 is 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)).

[0031] In some examples, the network node 110 is or includes a network node that communicates with the UE 120 via a radio access link, such as an RU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, 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. For example, the network node 110 may include 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 or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul, midhaul, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0032] In some examples, 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 ​​the network node 110 and / or the network node 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., a radius of several kilometers) 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 network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or a home network node. Figure 1In the example shown in , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. 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 (e.g., a mobile network node).

[0033] In some aspects, the term "base station" or "network node" may refer to a clustered base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a "base station" or "network node" may refer to a CU, a DU, a RU, a near real-time (near RT) RAN intelligent controller (RIC) or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeat the execution of at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions but not the other. In this way, a single device may include more than one base station.

[0034] 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. Figure 1 In the example shown in , a network node 110d (e.g., a relay network node) may communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0035] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, 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 network node may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0036] 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 communication link or a midhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless backhaul communication link or a wired backhaul communication link. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0037] UE 120 can be distributed throughout the wireless network 100, and each UE 120 can be stationary or mobile. UE 120 can include, for example, an access terminal, a terminal, a mobile station and / or a subscriber unit. 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 computer, 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 or wired medium.

[0038] Some UEs 120 may be considered as machine type communication (MTC) 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, which may communicate with a network node, 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 customer premises equipment. UE 120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some examples, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0039] 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. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0040] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, 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] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., according to 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 portions of FR1 are greater than 6 GHz, FR1 is often (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. A similar naming problem sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0042] 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.

[0043] 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 may broadly refer to frequencies that may be lower than 6 GHz, may be within FR1, or may 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 may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may 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) may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0044] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may: receive one or more channel state information (CSI) reference signals (CSI-RS); and send a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0045] 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: send one or more CSI-RS; and receive a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0046] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0047] Figure 2 2 is a diagram illustrating an example 200 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. Some network nodes 110 may not include a radio frequency component that facilitates direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0048] At the network node 110, the transmit processor 220 may receive data intended for the UE 120 (or a set of UEs 120) from the 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 provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource allocation 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 modulators) (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 also process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a to 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0049] 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) the 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.

[0050] 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.

[0051] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or 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.

[0052] 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 operations described herein (eg, with reference to FIG. 6A to FIG. 10 ) or any aspects of any of the methods described herein.

[0053] 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 of the modem 232 shown as DEMOD), 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 and / or uplink communications. 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 FIG. 6A to FIG. 10 ) or any aspects of any of the methods described herein.

[0054] 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 may perform one or more techniques associated with per-beam TD basis selection for Doppler CSI codebooks, 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 (e.g., directly, or after compilation, conversion, and / or interpretation) by one or more processors of network node 110 and / or UE 120, 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 operations of process 800 and / or other processes described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0055] In some aspects, the UE 120 includes: means for receiving one or more CSI-RS; and / or means for sending a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. Means for the UE 120 to perform operations described herein may include, for example, one or more of 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.

[0056] In some aspects, the network node 110 includes: means for transmitting one or more CSI-RS; and / or means for receiving a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. 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: a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0057] 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.

[0058] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0059] 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, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station or network equipment can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP or a cell, etc.) or one or more units (or one or more components) that perform base station functionality can be implemented as an aggregated base station (also referred to as an independent base station or a monolithic base station) or a decomposed base station. "Network entity" or "network node" may refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0060] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) may be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, 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 a CU, a DU, and a RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and the like.

[0061] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration 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 decomposed base station 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. Individual units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0062] Figure 3 3 is a diagram illustrating an example disaggregated base station architecture 300 according to the present disclosure. The disaggregated base station architecture 300 may include a CU 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated control units, such as a near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via an F1 interface. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0063] Each of the units (including CU 310, DU 330, RU 340) and the near-RT RIC 325, non-RT RIC 315, and SMO framework 305 may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to one or more communication interfaces of the corresponding unit may be configured to communicate with one or more of the other units via a transmission medium. In some examples, each of these units may include a wired interface and a wireless interface, the wired interface being configured to receive signals or send signals to one or more of the other units via a wired transmission medium, the wireless interface being configured to receive signals or send signals to one or more of the other units via a wired transmission medium, or both.

[0064] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, or service data adaptation protocol (SDAP) functions, etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 310. CU 310 may be configured to handle user plane functionality (e.g., central unit-user plane (CU-UP) functionality), control plane functionality (e.g., central unit-control plane (CU-CP) functionality), or a combination thereof. In some specific implementations, CU 310 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 310 may be implemented to communicate with DU 330 for network control and signaling.

[0065] Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DU 330 may host one or more of a radio link control (RLC) layer, a MAC layer, and one or more high physical (PHY) layers, at least in part, according to a functional partitioning (such as that defined by 3GPP). In some aspects, one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming or physical random access channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0066] Each RU 340 may implement lower layer functionality. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that hosts RF processing functions based on functional split (e.g., functional split defined by 3GPP) (such as lower layer functional split), or low PHY layer functions such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc. In this architecture, each RU 340 may be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0067] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RTRIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of the one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 can also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0068] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0069] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0070] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 The examples described are different.

[0071] Figure 4 4 is a diagram illustrating an example 400 of physical channels and reference signals in a wireless network according to the present disclosure. Figure 4 As shown, the downlink channel and the downlink reference signal may carry information from the network node 110 to the UE 120 , and the uplink channel and the uplink reference signal may carry information from the UE 120 to the network node 110 .

[0072] As shown, the downlink channel may include a physical downlink control channel (PDCCH) carrying downlink control information (DCI), a physical downlink shared channel (PDSCH) carrying downlink data, or a physical broadcast channel (PBCH) carrying system information, etc. In some aspects, PDSCH communication may be scheduled by PDCCH communication. As further shown, the uplink channel may include a physical uplink control channel (PUCCH) carrying uplink control information (UCI), a physical uplink shared channel (PUSCH) carrying uplink data, or a physical random access channel (PRACH) for initial network access, etc. In some aspects, UE 120 may send confirmation (ACK) or negative confirmation (NACK) feedback (e.g., ACK / NACK feedback or ACK / NACK information) in the UCI on PUCCH and / or PUSCH.

[0073] As further shown in the figure, the downlink reference signal may include a synchronization signal block (SSB), a channel state information (CSI) reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS) or a phase tracking reference signal (PTRS), etc. As also shown in the figure, the uplink reference signal may include a sounding reference signal (SRS), a DMRS, or a PTRS, etc.

[0074] The SSB may carry information used for initial network acquisition and synchronization, such as a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH, and a PBCH DMRS. The SSB is sometimes referred to as a synchronization signal / PBCH (SS / PBCH) block. In some aspects, the network node 110 may send multiple SSBs on multiple corresponding beams, and the SSBs may be used for beam selection.

[0075] The CSI-RS may carry information for downlink channel estimation (e.g., downlink CSI acquisition), which may be used for scheduling, link adaptation, or beam management, etc. The network node 110 may configure a CSI-RS set for the UE 120, and the UE 120 may measure the configured CSI-RS set. Based at least in part on these measurements, the UE 120 may perform channel estimation and may report channel estimation parameters to the network node 110 (e.g., in a CSI report), such as a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a layer indicator (LI), a rank indicator (RI), or a reference signal received power (RSRP), among other examples. The network node 110 can use the CSI reports to select transmission parameters for downlink communications to the UE 120, such as the number of transmission layers (e.g., rank), a precoding matrix (e.g., a precoder), a modulation and coding scheme (MCS), or to refine the downlink beams (e.g., using a beam refinement procedure or a beam management procedure), among other examples.

[0076] DMRS can carry information used to estimate the radio channel to demodulate the associated physical channel (e.g., PDCCH, PDSCH, PBCH, PUCCH, or PUSCH). The design and mapping of DMRS can be specific to the physical channel that the DMRS is used to estimate. DMRS is UE-specific, can be beamformed, can be restricted to scheduled resources (e.g., instead of being sent over a wideband), and can be sent only when necessary. As shown, DMRS is used for both downlink and uplink communications.

[0077] PTRS can carry information for compensating for oscillator phase noise. Typically, phase noise increases with the increase of the oscillator carrier frequency. Therefore, PTRS can be used at high carrier frequencies (such as millimeter wave frequencies) to mitigate phase noise. PTRS can be used to track the phase of the local oscillator and to achieve suppression of phase noise and common phase error (CPE). As shown, PTRS is used for both downlink communications (e.g., on PDSCH) and uplink communications (e.g., on PUSCH).

[0078] The PRS may carry information for implementing timing or ranging measurements of the UE 120 based on signals sent by the network node 110 to improve observed time difference of arrival (OTDOA) positioning performance. For example, the PRS may be a pseudo-random quadrature phase shift keying (QPSK) sequence mapped in a diagonal pattern with a frequency offset and a time offset to avoid conflicts with cell-specific reference signals and control channels (e.g., PDCCH). In general, the PRS may be designed to improve the detectability of the UE 120, which may require detecting downlink signals from multiple neighboring base stations in order to perform OTDOA-based positioning. Therefore, the UE 120 may receive the PRS from multiple cells (e.g., a reference cell and one or more neighboring cells), and may report a reference signal time difference (RSTD) based on OTDOA measurements associated with the PRS received from the multiple cells. In some aspects, the network node 110 may then calculate the positioning of the UE 120 based on the RSTD measurements reported by the UE 120.

[0079] The SRS may carry information for uplink channel estimation, which may be used for scheduling, link adaptation, pre-decoder selection, or beam management, etc. The network node 110 may configure one or more SRS resource sets for the UE 120, and the UE 120 may send the SRS on the configured SRS resource sets. The SRS resource sets may have configured usages, such as uplink CSI acquisition, downlink CSI acquisition for reciprocity-based operation, uplink beam management, etc. The network node 110 may measure the SRS, may perform channel estimation based at least in part on these measurements, and may use the SRS measurements to configure communications with the UE 120.

[0080] As indicated above, Figure 4 are provided as examples. Other examples can be found in the Figure 4 The examples described are different.

[0081] FIG. 5A to FIG. 5E is a diagram illustrating an example set 500 of codebook structures according to the present disclosure.

[0082] Figure 5AAn example of a precoder for 3GPP Release 16 (Rel-16) eType-IICSI supporting up to rank 4 is shown. For each layer (e.g., layers 0 to 3 as shown), the precoder across the number N3 precoding matrix indicator (PMI) subbands is N t ×N3 matrix W such that In this case, W1 is common to the layers, represents the discrete Fourier transform (DFT) basis, and is N t ×2L spatial domain (SD) basis matrix (which may also be called a “beam”), where N t is configured by RRC, and N t =2N1O1N2O2, which represents the number of transmit antennas, where O1 and O2 are oversampled. In addition, W f is layer-specific, represents the DFT basis, and is an M×N3 frequency-domain basis matrix, where M represents the number of frequency-domain bases and is rank-pair specific, such that for rank {1,2}, M1=M2, and for rank {3,4}, M3=M4 (and M1 or M3 is RRC configured). In addition, is layer specific and forms a 2L×M matrix with up to K0 non-zero coefficients for each layer (and where K0 is an RRC configured parameter). Across all layers, the UE may report up to 2K0 non-zero coefficients, where unreported coefficients are set to zero. Figure 5B Another example of a pre-decoder for a Rel-16e Type-IICSI pre-coding matrix for a layer is shown, where Where W1 represents the selected space domain basis, W f represents the selected frequency domain basis, and W2 represents the coefficient matrix, as described in more detail above.

[0083] Figure 5C The pre-coding matrix can be used to represent the rapid changes at time instance n. In this case, the coefficient matrix W2(n) with n=0,…,N4–1 can be compressed into the Doppler domain. In addition, the spatial domain basis W1 and the frequency domain basis W f is constant at time instance n. Therefore, to construct the precoding matrix, the UE may report one or more CSI-RS observations (where N ob =N4, where N ob represents the number of observations), where compression is performed at the UE and prediction is performed at the network node (e.g., base station). Alternatively, the UE may report one or more CSI-RS observations and a set of extrapolations, so that both compression and prediction are performed at the UE.

[0084] Figure 5D and Figure 5E illustrates an example of a possible codebook structure. In Figure 5D , a first possible codebook structure can be represented as where denotes the Kronecker product, and W t is a selected TD basis set. Similarly, in Figure 5E , a second possible codebook structure can be represented as In both the first possible codebook structure and the second possible codebook structure, (which can be represented as W2) includes the same set of entries but in an alternative arrangement. For example, in the first possible codebook structure, W2 has an arrangement of 2LM×S, while in the second possible codebook structure, W2 has an arrangement of 2L×MS. In each possible codebook, the TD basis selection is common for all beams. In other words, a common W t is used for all rows of W2 (e.g., a selected subset with S = 2 TD bases). However, in a communication scenario, the per-beam Doppler spectrum may be different for different channels or precoders. Thus, the beam-common TD basis selection may not be well-aligned with such communication scenarios.

[0085] As indicated above, FIG. 5A to FIG. 5E is provided as an example. Other examples may be different from the example described with respect to FIG. 5A to FIG. 5E

[0086] Some aspects described herein provide for beam-specific TD basis selection for CSI reporting. For example, a UE can select a beam-common TD basis matrix W t (e.g., where W t includes a relatively large number of TD bases, such as S = 6, where S represents the number of selected bases), and can select a per-beam TD basis selection S' from the selected beam-common TD basis matrix W t , where S' < S (e.g., S' = 2). In this case, the UE can report the beam-common TD basis matrix selection S and the per-beam TD basis selection S' in a CSI report. In this way, the UE can report and the network node can receive the per-beam TD basis selection to enable generation of a codebook that accounts for the differences in the per-beam Doppler spectrum, thereby improving communication between the UE and the network node.

[0087] 6A to 6F is a diagram illustrating an example set 600 associated with per-beam time-domain basis selection for a Doppler CSI codebook according to the present disclosure. As Fig. 6A shown, the example set 600 includes communication between a network node 110 and a UE 120. ​

[0088] As shown in Fig. 6A and further illustrated by reference numeral 610, the UE 120 may receive configuration information. For example, the UE 120 may receive from the network node 110 configuration information identifying one or more CSI-RSs to be monitored. In some aspects, the UE 120 may receive information associated with the configured value of S or S'. For example, the UE 120 may receive information identifying the value for S', and the UE 120 may determine the value for S = βS', where β > 1 and is configured for the UE 120 (e.g., a static configuration in the specification). In some aspects, for the beam-sharing S' value, S = αLS', where L represents the number of layers, and α represents a static configuration value from the specification. Additionally or alternatively, for the beam-specific S' value, where 0 < α < 1.

[0089] As shown in Fig. 6A and further illustrated by reference numerals 620 and 630, the UE 120 may receive one or more CSI-RSs and may transmit a CSI report based on the one or more CSI-RSs. In some aspects, the TD-based indication described herein is transmitted on a per-layer basis. For example, the UE 120 may convey an indication of the TD basis and / or non-zero coefficients (NZCs) for each communication layer configured for communication between the UE 120 and the network node 110.

[0090] In some embodiments, the UE 120 may select a TD basis to report to the network node 110. For example, the UE 120 may select a beam-sharing TD basis matrix W from a TD codebook that includes a set of TD bases. t . The TD basis matrix W t may include a certain number of TD bases S. At least in part based on the selection of the TD basis matrix, the UE 120 may select a per-beam TD basis selection with a certain number of TD bases S' (e.g., where S' < S). For example, the UE 120 may select S' per-beam TD bases from the S TD bases of W t . Figure 6B illustrates an example associated with the前述second possible codebook structure. For example, as Figure 6B shown, S TD bases may be selected for W t such that S = 6. In this case, as an example, the per-beam TD basis selection may be S' = 2. For example, as Figure 6C shown (where for all beams, S = 6 and S' = 2), for the first beam (for beams {0, 1, 2, 3}, L = 4) with 4 selected beams (SD bases), a first subset of S is selected as the S' TD bases for the first beam (beam 1). In contrast, as Fig.6DAs shown in , for the second beam (Beam 2), the second subset of S is selected as the S' TD basis for the second beam. In this case, the first subset of S is different from the second subset of S; however, in some aspects, multiple beams can have the same subset of S selected as the S' TD basis. Similarly, although some aspects are described in terms of the same S' value for each beam (e.g., S'=2), some beams can have different S' values ​​than some other beams.

[0091] In some aspects, the UE 120 may use a field of an uplink control message (e.g., a CSI report) to report the TD basis selection. For example, the UE 120 may set the first field of the CSI report to identify the beam-sharing selection for a set of S bases, and set the second field of the CSI report to identify the per-beam selection for a subset S' of the S bases. In some aspects, the UE 120 may use the first field to report any combination of the S bases. For example, if TD basis #0 is always selected among the S bases (e.g., this may be statically set in the specification or configured using configuration information), the UE 120 may use Alternatively, if TD basis #0 is not always selected, UE 120 can use In some aspects, UE 120 may select a contiguous set of S bases based at least in part on the selection window. In this case, UE 120 may use Units (in case TD Basis #0 is always selected) or The 10 bits (in the case where TD basis #0 is not always selected within S) indicate the position of the selection window of consecutive S bases (with wraparound). In some aspects, UE 120 may use The bits indicate the combination of S' bases that have been selected from the S bases for a single beam. Similarly, for beam #0 (SD basis #0), if TD basis #0 is always selected for beam #0, UE 120 may use The bits indicate the S' basis that has been selected for beam #0 (SD basis #0). Fig. 6E As shown in , a set of S=6 bases is selected from a set of D bases, where TD basis #0 is selected as the default, and a set of S′=2 bases is selected for a specific beam.

[0092] In some aspects, the UE 120 may send information indicating the locations of non-zero coefficients (NZC) within the coefficient matrix W2. For example, the UE 120 may include a per-beam indication of the NZC locations for the selected S' TD bases. In this case, by indicating the NZC locations based at least in part on the S' TD bases instead of the S TD bases, the amount of overhead signaling is reduced. Fig. 6F An example of NZC positions for a set of S' TD bases is shown. In this case, S'=2 and M=4, where M represents the configured number of selected frequency domain bases. Therefore, UE 120 may send a bitmap of size 2S'M=16 bits to convey an indication of the position of the NZC.

[0093] As in Fig. 6A 6 and further illustrated by reference numeral 640, UE 120 and network node 110 may communicate using a codebook and / or pre-decoder associated with the CSI report. For example, network node 110 may generate a pre-decoder based at least in part on the reported TD bases S and S′ and may communicate with UE 120 using the pre-decoder.

[0094] As indicated above, 6A to 6F are provided as examples. Other examples can be found in the 6A to 6F The examples described are different.

[0095] Figure 7 is a diagram illustrating an example process 700 performed, for example, by a UE in accordance with the present disclosure. Example process 700 is an example of operations in which a UE (eg, UE 120) performs per-beam time-domain basis selection for a Doppler CSI codebook.

[0096] like Figure 7 As shown in FIG. 7 , in some aspects, process 700 may include receiving one or more CSI-RS (block 710). For example, a UE (e.g., using Fig. 9 The communication manager 140 and / or receiving component 902 depicted in FIG. 1 may receive one or more CSI-RS, as described above.

[0097] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include sending a CSI report associated with one or more CSI-RSs, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection (block 720). For example, a UE (e.g., using Fig. 9The communication manager 140 and / or the sending component 904 depicted in the figure can send a CSI report associated with one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection, as described above.

[0098] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0099] In a first aspect, process 700 includes selecting a beam-common TD basis set from a TD codebook, and sending a CSI report includes sending the CSI report based at least in part on selecting the beam-common TD basis set.

[0100] In a second aspect, alone or in combination with the first aspect, process 700 includes selecting one or more per-beam TD basis subsets from a beam-common TD basis set selection, and sending a CSI report includes sending a CSI report based at least in part on selecting the one or more per-beam TD basis subsets.

[0101] In a third aspect, alone or in combination with one or more of the first and second aspects, the CSI report comprises a first field associated with a beam-common TD basis set selection and a second field associated with one or more per-beam TD basis subset selections.

[0102] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the basis set transmitted in the first field is Units or The ones bit is associated with D, where D represents the number of possible TD bases and S represents the number of selected TD bases.

[0103] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the basis set transmitted in the first field is or The ones bit is associated with S, where S represents the number of selected consecutive TD bases and D represents the number of possible TD bases.

[0104] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the basis set transmitted in the second field is or , where S represents the number of selected bases and S' represents the number of selected bases per beam, so that S' <S。

[0105] In a seventh aspect, either alone or in combination with one or more of aspects 1 to 6, sending a CSI report comprises sending a CSI report to indicate one or more NZC positions within a coefficient matrix associated with a codebook, and the one or more NZC positions are selected at least in part based on one or more per-beam TD basis subsets.

[0106] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

[0107] In a ninth aspect, either alone or in combination with one or more of aspects one to eight, a quantity parameter associated with beam-common TD basis set selection is at least partially based on at least one of: a quantity parameter associated with per-beam TD basis subset selection or a quantity parameter associated with beam selection.

[0108] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 The blocks depicted in the process 700 may include 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 in the blocks of the process 700 may be performed in parallel.

[0109] Figure 8 is a diagram illustrating an example process 800 performed, for example, by a network node in accordance with the present disclosure. The example process 800 is an example in which a network node (eg, network node 110) performs operations associated with per-beam time-domain basis selection for a Doppler CSI codebook.

[0110] like Figure 8 As shown in FIG. 8 , in some aspects, process 800 may include transmitting one or more CSI-RS (block 810). For example, a network node (e.g., using Fig.10 The communication manager 150 and / or the transmitting component 1004 depicted in FIG. 1 may transmit one or more CSI-RS as described above.

[0111] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include receiving a CSI report associated with one or more CSI-RSs, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection (block 820). For example, a network node (e.g., using Fig.10The communication manager 150 and / or receiving component 1002 depicted in the figure can receive a CSI report associated with one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection, as described above.

[0112] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0113] In a first aspect, process 800 includes generating a predecoder based at least in part on a beam-common TD basis set selection and one or more per-beam TD basis subset selections, and communicating with a UE based on the predecoder.

[0114] In a second aspect, alone or in combination with the first aspect, the beam-common TD basis set is selected from a TD codebook.

[0115] In a third aspect, alone or in combination with one or more of the first and second aspects, one or more per-beam TD basis subsets are selected from a beam-common TD basis set selection.

[0116] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the CSI report includes a first field associated with a beam-common TD basis set selection and a second field associated with one or more per-beam TD basis subset selections.

[0117] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the basis set transmitted in the first field is Units or The ones bit is associated with D, where D represents the number of possible TD bases and S represents the number of selected TD bases.

[0118] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the basis set transmitted in the first field is or The ones bit is associated with S, where S represents the number of selected consecutive TD bases and D represents the number of possible TD bases.

[0119] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the basis set transmitted in the second field is or The bits are associated, where S represents the number of selected bases, and S' represents the number of selected bases per beam, so that S' <S。

[0120] In an eighth aspect, either alone or in combination with one or more of aspects 1 to 7, the CSI report comprises one or more NZC positions within a coefficient matrix associated with a codebook, and the one or more NZC positions are selected at least in part based on one or more per-beam TD basis subsets.

[0121] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

[0122] In a tenth aspect, either alone or in combination with one or more of aspects one to nine, a quantity parameter associated with beam-common TD basis set selection is at least partially based on at least one of: a quantity parameter associated with per-beam TD basis subset selection or a quantity parameter associated with beam selection.

[0123] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 The blocks depicted in the process 800 may include 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 in the blocks of the process 800 may be performed in parallel.

[0124] 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, among other things, a selection component 908.

[0125] In some aspects, the apparatus 900 may be configured to perform the 6A to 6F Additionally or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as Figure 7 The process 700. In some aspects, Fig. 9 The apparatus 900 and / or one or more components shown in FIG. 1 may include a combination of Figure 2 Additionally or alternatively, Fig. 9 One or more of the components shown in the figure may be combined with Figure 2Additionally 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 that are stored in a non-transitory computer-readable medium and can be executed by a controller or processor to perform the function or operation of the component.

[0126] The receiving component 902 may receive communications from the device 906, such as reference signals, control information, data communications, or a combination 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) 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 a described UE.

[0127] Transmit component 904 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 906. In some aspects, one or more other components of device 900 may generate communications and may provide the generated communications to transmit component 904 for transmission to device 906. In some aspects, transmit 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 device 906. In some aspects, transmit 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.

[0128] The receiving component 902 may receive one or more CSI-RSs. The sending component 904 may send a CSI report associated with the one or more CSI-RSs, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. The selecting component 908 may select a beam-common TD basis set from a TD codebook, wherein sending the CSI report includes sending the CSI report based at least in part on selecting the beam-common TD basis set. The selecting component 908 may select one or more per-beam TD basis subsets from the beam-common TD basis set selection.

[0129] Fig. 9 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig. 9 The components shown in the figure may include additional components, fewer components, different components, or components arranged in a different manner. Fig. 9 Two or more components shown in the figure may be implemented in a single component, or Fig. 9 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig. 9 A set (one or more) of components shown in the figure may perform the operations described as being performed by Fig. 9 One or more functions performed by another group of components shown in the figure.

[0130] 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 transmitting 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 transmitting component 1004. As further shown, apparatus 1000 may include a communication manager 150. Communication manager 150 may include a pre-decoder component 1008, among other things.

[0131] In some aspects, the apparatus 1000 may be configured to perform the 6A to 6F Additionally or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as Figure 8 The process 800. In some aspects, Fig.10 The apparatus 1000 and / or one or more components shown in FIG. 1 may include a combination of Figure 2 Additionally or alternatively, Fig.10 One or more of the components shown in the figure 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 that are stored in a non-transitory computer-readable medium and can be executed by a controller or processor to perform the function or operation of the component.

[0132] The receiving component 1002 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the apparatus 1006. The receiving component 1002 may provide the received communications to one or more other components of the apparatus 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) on ​​the received communications and may provide the processed signals to one or more other components of the apparatus 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.

[0133] The transmitting component 1004 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the apparatus 1006. In some aspects, one or more other components of the apparatus 1000 may generate communications and may provide the generated communications to the transmitting component 1004 for transmission to the apparatus 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 apparatus 1006. In some aspects, the transmitting component 1004 may include a combination of 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 can be co-located with the receive component 1002 in a transceiver.

[0134] The transmitting component 1004 may transmit one or more CSI-RS. The receiving component 1002 may receive a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common TD basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection. The pre-decoder component 1008 may generate a pre-decoder based at least in part on the beam-common TD basis set selection and the one or more per-beam TD basis subset selections. The transmitting component 1004 and / or the receiving component 1002 may communicate with the apparatus 1006 based on the pre-decoder.

[0135] Fig.10 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Fig.10 The components shown in the figure may include additional components, fewer components, different components, or components arranged in a different manner. Fig.10Two or more components shown in the figure may be implemented in a single component, or Fig.10 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.10 A set (one or more) of components shown in the figure may perform the operations described as being performed by Fig.10 One or more functions performed by another group of components shown in the figure.

[0136] The following provides an overview of some aspects of the disclosure:

[0137] Aspect 1: A method of wireless communication performed by a user equipment (UE), the method comprising: receiving one or more channel state information (CSI) reference signals (RS) (CSI-RS); and sending a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0138] Aspect 2: According to the method of aspect 1, the method also includes: selecting a beam-common TD basis set from a TD codebook, and wherein sending the CSI report includes: sending the CSI report based at least in part on selecting the beam-common TD basis set.

[0139] Aspect 3: The method according to aspect 2, further comprising: selecting one or more per-beam TD basis subsets from the beam-common TD basis set selection; and wherein sending the CSI report comprises: sending the CSI report based at least in part on selecting the one or more per-beam TD basis subsets. Wherein sending the CSI report comprises: sending the CSI report based at least in part on selecting the one or more per-beam TD basis subsets.

[0140] Aspect 4: The method according to any one of aspects 1 to 3, wherein the CSI report comprises a first field associated with the beam-common TD basis set selection and a second field associated with the one or more per-beam TD basis subset selections.

[0141] Aspect 5: The method according to aspect 4, wherein the basis set transmitted in the first field is or The ones bit is associated with D, where D represents the number of possible TD bases and S represents the number of selected TD bases.

[0142] Aspect 6: The method according to aspect 4, wherein the basis set transmitted in the first field is or The ones bit is associated with S, where S represents the number of selected consecutive TD bases and D represents the number of possible TD bases.

[0143] Aspect 7: The method according to aspect 4, wherein the basis set transmitted in the second field is or The bits are associated, where S represents the number of selected bases, and S' represents the number of selected bases per beam, so that S' <S。

[0144] Aspect 8: A method according to any one of Aspects 1 to 7, wherein sending the CSI report includes: sending the CSI report to indicate one or more non-zero coefficient (NZC) positions within a coefficient matrix associated with a codebook, and wherein the one or more NZC positions are selected at least in part based on the one or more per-beam TD basis subsets.

[0145] Aspect 9: The method according to any one of aspects 1 to 8, wherein the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

[0146] Aspect 10: A method according to any one of Aspects 1 to 9, wherein the quantity parameter associated with the beam-common TD basis set selection is at least partially based on at least one of the following: a quantity parameter associated with the per-beam TD basis subset selection or a quantity parameter associated with beam selection.

[0147] Aspect 11: A method of wireless communication performed by a network node, the method comprising: sending one or more channel state information (CSI) reference signals (RS) (CSI-RS); and receiving a CSI report associated with the one or more CSI-RS, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

[0148] Aspect 12: According to the method of Aspect 11, the method also includes: generating a predecoder based at least in part on the beam-common TD basis set selection and the one or more per-beam TD basis subset selections; and communicating with a user equipment (UE) based on the predecoder.

[0149] Aspect 13: The method according to any one of aspects 11 to 12, wherein the beam-common TD basis set is selected from a TD codebook.

[0150] Aspect 14: The method according to aspect 13, wherein one or more per-beam TD basis subsets are selected from the beam-common TD basis set selection.

[0151] Aspect 15: The method according to any one of aspects 11 to 13, wherein the CSI report comprises a first field associated with the beam-common TD basis set selection and a second field associated with the one or more per-beam TD basis subset selections.

[0152] Aspect 16: The method according to aspect 15, wherein the basis set transmitted in the first field is Units or The ones bit is associated with D, where D represents the number of possible TD bases and S represents the number of selected TD bases.

[0153] Aspect 17: The method according to aspect 15, wherein the basis set transmitted in the first field is Units or The ones bit is associated with S, where S represents the number of selected consecutive TD bases and D represents the number of possible TD bases.

[0154] Aspect 18: The method according to aspect 15, wherein the basis set transmitted in the second field is or The bits are associated, where S represents the number of selected bases, and S' represents the number of selected bases per beam, so that S' <S。

[0155] Aspect 19: A method according to any one of Aspects 11 to 18, wherein the CSI report includes one or more non-zero coefficient (NZC) positions within a coefficient matrix associated with a codebook, and wherein the one or more NZC positions are selected at least in part based on the one or more per-beam TD basis subsets.

[0156] Aspect 20: The method according to any one of aspects 11 to 19, wherein the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

[0157] Aspect 21: A method according to any one of Aspects 11 to 20, wherein the quantity parameter associated with the beam-common TD basis set selection is at least partially based on at least one of the following: a quantity parameter associated with the per-beam TD basis subset selection or a quantity parameter associated with beam selection.

[0158] Aspect 22: 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 10.

[0159] Aspect 23: A device for wireless communication, the device comprising: a memory; and 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 10.

[0160] Aspect 24: An apparatus for wireless communication, the apparatus comprising: at least one component for performing the method according to one or more of aspects 1 to 10.

[0161] Aspect 25: 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 10.

[0162] Aspect 26: 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 10.

[0163] Aspect 27: 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 11 to 21.

[0164] Aspect 28: A device for wireless communication, the device comprising: a memory; and 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 11 to 21.

[0165] Aspect 29: An apparatus for wireless communication, the apparatus comprising: at least one component for performing the method according to one or more of aspects 11 to 21.

[0166] Aspect 30: 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 11 to 21.

[0167] Aspect 31: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions, which, when executed by one or more processors of a device, causes the device to perform one or more methods described in aspects 11 to 21.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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 described 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 claim set. 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).

[0172] Any element, action or instruction used herein should not be interpreted as key or necessary unless clearly stated. In addition, as used herein, the articles "one" and "an" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more items connected to the article "said", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items, and can be used interchangeably with "one or more". If you only want to refer to an item, the phrase "only one" or similar terms will be used. In addition, as used herein, the terms "have", "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "an element with" A can also have B). In addition, the phrase "based on" is intended to mean "based at least in part on", unless explicitly stated otherwise. 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 coupled to the memory, the one or more processors configured to: receiving one or more channel state information (CSI) reference signals (RS) (CSI-RS); and A CSI report associated with the one or more CSI-RSs is transmitted, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

2. The UE of claim 1, wherein the one or more processors are further configured to: A beam-shared TD basis set is selected from the TD codebook, and Wherein, in order to send the CSI report, the one or more processors are configured to: The CSI report is sent based at least in part on selecting the beam-common TD basis set.

3. The UE of claim 2, wherein the one or more processors are further configured to: selecting one or more per-beam TD basis subsets from said beam-common TD basis set selection; and Wherein, in order to send the CSI report, the one or more processors are configured to: The CSI report is sent based at least in part on selecting the one or more per-beam TD basis subsets. 4 . The UE of claim 1 , wherein the CSI report comprises a first field associated with the beam-common TD basis set selection and a second field associated with the one or more per-beam TD basis subset selections.

5. The UE according to claim 4, wherein the basis set transmitted in the first field is Units or The ones are related, where D represents the number of possible TD bases, and S represents the number of selected TD bases.

6. The UE according to claim 4, wherein the basis set transmitted in the first field is Units or The ones are related, where S represents the number of selected consecutive TD bases, and D represents the number of possible TD bases.

7. The UE according to claim 4, wherein the basis set transmitted in the second field is or The ones are related, where S represents the number of selected bases and S' represents the number of selected bases per beam, such that S' <S。 8. The UE of claim 1 , wherein to send the CSI report, the one or more processors are configured to: sending the CSI report to indicate one or more non-zero coefficient (NZC) locations within a coefficient matrix associated with a codebook, and Wherein the one or more NZC positions are selected based at least in part on the one or more per-beam TD basis subsets.

9. The UE of claim 1, wherein the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

10. The UE of claim 1, wherein a quantity parameter associated with the beam-common TD basis set selection is based at least in part on at least one of: a quantity parameter associated with the per-beam TD basis subset selection or a quantity parameter associated with beam selection.

11. A network node for wireless communication, the network node comprising: Memory; and one or more processors coupled to the memory, the one or more processors configured to: transmitting one or more channel state information (CSI) reference signals (RS) (CSI-RS); and A CSI report associated with the one or more CSI-RSs is received, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

12. The network node of claim 11, wherein the one or more processors are further configured to: generating a predecoder based at least in part on the beam-common TD basis set selection and the one or more per-beam TD basis subset selections; and Communicating with a user equipment (UE) is performed based on the precoder.

13. The network node of claim 11, wherein the beam-common TD basis set is selected from a TD codebook.

14. The network node of claim 13, wherein one or more per-beam TD basis subsets are selected from the beam-common TD basis set selection.

15. The network node of claim 11, wherein the CSI report comprises a first field associated with the beam-common TD basis set selection and a second field associated with the one or more per-beam TD basis subset selections.

16. The network node according to claim 15, wherein the basis set conveyed in the first field is Units or The ones are related, where D represents the number of possible TD bases, and S represents the number of selected TD bases.

17. The network node according to claim 15, wherein the basis set conveyed in the first field is Units or The ones are related, where S represents the number of selected consecutive TD bases, and D represents the number of possible TD bases.

18. The network node according to claim 15, wherein the basis set conveyed in the second field is or The ones are related, where S represents the number of selected bases and S' represents the number of selected bases per beam, such that S' <S。 19. The network node of claim 11, wherein the CSI report comprises one or more non-zero coefficient (NZC) positions within a coefficient matrix associated with a codebook, and Wherein the one or more NZC positions are selected based at least in part on the one or more per-beam TD basis subsets.

20. The network node of claim 11, wherein the beam-common TD basis set selection and the one or more per-beam TD basis subset selections are on a per-layer basis.

21. The network node of claim 11, wherein a quantity parameter associated with the beam-common TD basis set selection is based at least in part on at least one of: a quantity parameter associated with the per-beam TD basis subset selection or a quantity parameter associated with beam selection.

22. A method of wireless communication performed by a user equipment (UE), the method comprising: receiving one or more channel state information (CSI) reference signals (RS) (CSI-RS); as well as A CSI report associated with the one or more CSI-RSs is transmitted, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

23. The method according to claim 22, further comprising: A beam-shared TD basis set is selected from the TD codebook, and The sending of the CSI report includes: The CSI report is sent based at least in part on selecting the beam-common TD basis set.

24. The method according to claim 23, further comprising: selecting one or more per-beam TD basis subsets from the beam-common TD basis set selection; and The sending of the CSI report includes: The CSI report is sent based at least in part on selecting the one or more per-beam TD basis subsets.

25. The method of claim 22, wherein the CSI report comprises a first field associated with the beam-common TD basis set selection and a second field associated with the one or more per-beam TD basis subset selections.

26. The method of claim 22, wherein sending the CSI report comprises: sending the CSI report to indicate one or more non-zero coefficient (NZC) locations within a coefficient matrix associated with a codebook, and Wherein the one or more NZC positions are selected based at least in part on the one or more per-beam TD basis subsets.

27. A method of wireless communication performed by a network node, the method comprising: transmitting one or more channel state information (CSI) reference signals (RS) (CSI-RS); as well as A CSI report associated with the one or more CSI-RSs is received, wherein the CSI report is associated with a beam-common time domain (TD) basis set selection and one or more per-beam TD basis subset selections from the beam-common TD basis set selection.

28. The method according to claim 27, further comprising: generating a predecoder based at least in part on the beam-common TD basis set selection and the one or more per-beam TD basis subset selections; as well as Communicating with a user equipment (UE) is performed based on the precoder.

29. The method of claim 27, wherein the beam-common TD basis set is selected from a TD codebook.

30. The method of claim 29, wherein one or more per-beam TD basis subsets are selected from the beam-common TD basis set selection.

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