Channel state information spatial domain profile configuration and selection for multiple transmit-receive points

Abstract

A network node may transmit a channel state information (CSI) configuration including a set of spatial domain (SD) profiles associated with a plurality of SD base numbers for each of a plurality of transmit receive points (TRPs). A user equipment (UE) may receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRP. The UE may select an SD profile from a set of SD profiles associated with the plurality of SD base numbers included in the CSI configuration. The UE may transmit, for a network node, a CSI including a selected SD profile from a set of SD profiles associated with a plurality of SD base numbers. A network node may receive a CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers.

Description

Technical Field

[0001] The present disclosure relates generally to communication systems, and more particularly, to channel state information (CSI) configuration for spatial domain (SD) selection for multiple transmit receive points (TRPs). Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. An example of a telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution released by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR may be based on the Long Term Evolution (LTE) standard. There is a need for further improvements in 5G NR technology. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0004] A simplified summary of one or more aspects is provided below to provide a basic understanding of such aspects. This overview is not a broad overview of all expected aspects. This overview neither identifies the key or important elements of all aspects, nor describes the scope of any or all aspects. Its sole purpose is to provide some concepts of one or more aspects in a simplified form as a prelude to a more detailed description provided later.

[0005] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus at a user equipment are provided. The apparatus may receive a channel state information (CSI) configuration including a spatial domain (SD) profile set associated with a plurality of SD base numbers for each of a plurality of transmit receive points (TRPs). The apparatus may select an SD profile from the SD profile set associated with a plurality of SD base numbers included in the CSI configuration. The apparatus may send CSI for a network node, the CSI including an SD profile selected from the SD profile set associated with a plurality of SD base numbers.

[0006] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus at a network node are provided. The apparatus may send a channel state information (CSI) configuration including a set of spatial domain (SD) profiles associated with a plurality of SD basis numbers for each of a plurality of transmit receive points (TRPs). The apparatus may receive CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD basis numbers. The CSI may be received from a user equipment (UE).

[0007] To achieve the aforementioned and related purposes, one or more aspects may include the features fully described below and specifically pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0009] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0010] Figure 2B is a schematic diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0011] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0012] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 3 is a schematic diagram showing an example of a base station and a user equipment (UE) in an access network.

[0014] Figure 4 is a diagram showing an example of a UE and multiple transmit receive points (TRPs) in an access network.

[0015] Figure 5 is a diagram illustrating examples of first and second parts of channel state information (CSI) in accordance with various aspects of the present disclosure.

[0016] Figure 6 is a connection flow diagram illustrating an example of a UE configured to select a CSI profile from a CSI configuration sent by a network node in accordance with various aspects of the present disclosure.

[0017] Figure 7 is a flow chart of a method of wireless communication.

[0018] Figure 8 is a flow chart of a method of wireless communication.

[0019] Fig. 9 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities.

[0020] Fig.10 is a diagram illustrating an example of a hardware implementation for an example network entity.

[0021] Fig.11 is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0022] A network node may be configured to send data to a UE using coherent joint transmission (CJT) using multiple transmit receive points (mTRPs). A user equipment (UE) may be configured to select one or more spatial domain (SD) bases for CJT. The selection of one or more SD bases may be sent to the network node as channel state information (CSI). For network systems with many TRPs, the overhead for selecting one or more SD bases may be considerable. The overhead of allowing the UE to select any combination of SD bases from all TRPs in the network may also be wasteful. In addition, by limiting the SD bases from which the UE can select, the network may be able to better load balance data transmissions. In order to minimize the overhead used by the UE to configure CJT using mTRP, such as indicating that an SD base is selected from an expected set of SD bases, the network node may be configured to provide the UE with a CSI configuration having a reduced set of profiles that the UE can select. The UE may then select one or more profiles from the reduced set of profiles and send an indication of the selection as CSI to the network node. The network node may use CSI to configure CJT.

[0023] A network node may send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of transmit receive points (TRPs). A UE may receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. The UE may select an SD profile from the set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. The UE may send CSI to the network node including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers. The network node may receive CSI including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers.

[0024] The detailed description described below in conjunction with the accompanying drawings describes various configurations and is not intended to represent the only configuration in which the concepts described herein may be implemented. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0025] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus and methods are described in the detailed description below and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] For example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system", which includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform various functions described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referring to software, firmware, middleware, microcode, hardware description language, or other, software should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable programs, threads of execution, programs, functions, or any combination thereof.

[0027] Therefore, in one or more example aspects, implementations and / or use cases, the described functions may be implemented in hardware, software or any combination thereof. If implemented in software, the functions may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. By way of example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the aforementioned computer-readable media types, or any other medium that can be used to store computer executable code that can be accessed by a computer in the form of instructions or data structures.

[0028] Although various aspects, implementations and / or use cases are described in this application by illustrating some examples, additional or different aspects, implementations and / or use cases may appear in many different arrangements and scenarios. The various aspects, implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, various aspects, implementations and / or use cases can be generated via integrated chip implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may or may not specifically point to use cases or applications, the applicability of various types of the described examples may appear. Various aspects, implementations and / or use cases can be from chip-level or modular components of one or more technologies incorporated herein to non-modular, non-chip-level implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems. In some actual settings, the device incorporating the described aspects and features may also include additional components and features for the implementations and practices of the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.). The techniques described herein can be practiced in various devices of different sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0029] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobile element of a network, a radio access network (RAN) node, a core network node, a network element or a network device (such as a base station (BS) or one or more units (or one or more components) performing base station functions) can be implemented in an aggregated or decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5GNB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0030] The aggregated base station can be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. The decomposed base station can be configured to utilize a protocol stack physically or logically distributed between two or more units (such as one or more central or centralized units (CU), one or more distributed units (DU), or one or more radio units (RU)). In some aspects, the CU can be implemented within the RAN node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed in one or more other RAN nodes. The DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can be implemented as a virtual unit (i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU)).

[0031] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as the O-RAN Alliance Initiative) or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality for at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0032] Figure 1100 is a diagram illustrating an example of a wireless communication system and an access network. The wireless communication system shown includes a decomposed base station architecture. The decomposed base station architecture may include one or more CUs 110, which may communicate directly with a core network 120 via a backhaul link, or indirectly with a core network 120 through one or more decomposed base station units (such as a near real-time (near RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a service management and orchestration (SMO) framework 105, or both). The CU 110 may communicate with one or more DUs 130 via corresponding mid-haul links such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served by multiple RUs 140 at the same time.

[0033] Each of the units (i.e., CU 110, DU 130, RU 140) and the near-RT RIC 125, the non-RT RIC 115, and the SMO framework 105 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 unit in the unit or an associated processor or controller that provides instructions to the communication interface of the unit may be configured to communicate with one or more of the other units via a transmission medium. For example, a unit may include a wired interface configured to receive a signal on a wired transmission medium or to send a signal to one or more other units in the other units. In addition, a unit may include a wireless interface, which may include a receiver, a transmitter, or a transceiver (such as a radio frequency (RF) transceiver) configured to receive a signal on a wireless transmission medium or to send a signal to one or more other units in the other units, or both.

[0034] In some aspects, the CU 110 may host one or more higher-layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface configured to transmit signals to other control functions hosted by the CU 110. The CU 110 may be configured to process user plane functions (i.e., central unit-user plane (CU-UP)), control plane functions (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some implementations, the CU 110 may be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (e.g., via an E1 interface when implemented in an O-RAN configuration). As needed, the CU 110 may be implemented to communicate with the DU 130 for network control and signaling.

[0035] DU 130 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RU 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation, demodulation, etc.) at least in part according to a functional split (such as a functional split defined by 3GPP). In some aspects, DU 130 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface configured to transmit signals with other layers (and modules) hosted by DU 130 or control functions hosted by CU 110.

[0036] The lower layer functions may be implemented by one or more RUs 140. In some deployments, based at least in part on a functional split (such as a lower layer functional split), a RU 140 controlled by a DU 130 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (e.g., performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both. In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the DU 130 and the CU 110 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0037] The SMO framework 105 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 105 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 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-cloud) 190) to perform network element lifecycle management (e.g., to instantiate 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 110, DU 130, RU 140, and near-RT RIC 125. In some implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. In addition, in some implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0038] The non-RT RIC 115 may be configured to include logic functions that implement non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows (including model training and updating), or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or in communication with the near-RT RIC 125 (e.g., via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that implement near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (e.g., via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB with the near-RT RIC 125.

[0039] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (e.g., via reconfiguration of O1) or via the creation of a RAN management policy (such as an A1 policy).

[0040] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component indicated by a dotted line indicates that each component may be included in the base station 102 or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group called a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from UE 104 to RU140 and / or a downlink (DL) (also referred to as a forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. Base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0041] Certain UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0042] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether a channel is available.

[0043] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified with the frequency range names FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz. Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often referred to (interchangeably) as the "millimeter wave" band in documents and articles, but 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).

[0044] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands of these mid-band frequencies as the frequency range designation FR3 (7.125GHz-24.25GHz). The frequency bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus the characteristics 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 above 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6GHz–71GHz), FR4 (71GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands falls within the EHF band.

[0045] In view of the above, unless otherwise specified, if the term "sub-6GHz" or the like is used in this document, it may broadly refer to a frequency that may be less than 6GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" or the like is used in this document, it may broadly refer to a frequency that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.

[0046] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may transmit a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also transmit a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive and transmit directions for each base station 102 / UE 104. The transmit and receive directions of the base station 102 may be the same or different. The transmit and receive directions of the UE 104 may be the same or different.

[0047] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver functional unit, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), a network node, a network entity, a network device, or some other appropriate term. The base station 102 may be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station having a baseband unit (BBU) (including a CU and a DU) and a RU, or as a decomposed base station including one or more of a CU, a DU, and / or a RU, and a RAN that may include a decomposed base station and / or an aggregated base station may be referred to as a next generation (NG) RAN (NG-RAN).

[0048] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that handles signaling between UE 104 and the core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity processing, access authorization, and subscription management. One or more location servers 168 are shown as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, LMF 166, positioning determination entity (PDE), serving mobile location center (SMLC), mobile positioning center (MPC), etc. GMLC 165 and LMF 166 support UE location services. GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. LMF 166 receives measurement and assistance information from NG-RAN and UE 104 via AMF 161 to calculate the positioning of UE 104. NG-RAN can determine the location of UE 104 using one or more positioning methods. Positioning UE 104 may involve signal measurements, positioning estimates, and optional speed calculations based on measurements. Signal measurements may be performed by UE 104 and / or serving base station 102. The measured signal can be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / positioning systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., air pressure sensor, motion sensor), NR enhanced cell ID (NR E-CID) method, NR signal (e.g., multi-round trip time (Multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival and UL angle of arrival (UL-AoA) positioning) and / or other systems / signals / sensors.

[0049] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similar functional devices. Some UE 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, user stations, mobile units, user units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile user stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or some other suitable terms. In some scenarios, the term UE may also be applied to one or more companion devices, such as in a device constellation arrangement. One or more of these devices may access a network together and / or individually.

[0050] Reference again Figure 1 In certain aspects, the UE 104 may have a CSI profile selection component 198 configured to receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. The CSI profile selection component 198 may be configured to select an SD profile from the set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. The CSI profile selection component 198 may be configured to send CSI to a network node, the CSI including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers. In certain aspects, the base station 102 may have a CSI profile configuration component 199 configured to send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. The CSI profile configuration component 199 may be configured to receive CSI including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers. The CSI may be received from the UE. Although the following description may focus on coherent joint transmission (CJT) multi-TRP (mTRP), the concepts described herein may be applied to other similar areas, such as sTRP or non-coherent joint transmission (NCJT). Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0051] Figure 2Ais a diagram 200 showing an example of a first subframe within a 5G NR frame structure. Figure 2B is a schematic diagram 230 showing an example of DL channels within a 5G NR subframe. Figure 2C is a diagram 250 showing an example of a second subframe within a 5G NR frame structure. Figure 2D is a diagram 280 showing an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD) (wherein, for a particular set of subcarriers (carrier system bandwidth), subframes within a subcarrier set are dedicated to either DL or UL), or can be time division duplex (TDD) (wherein, for a particular set of subcarriers (carrier system bandwidth), subframes within a subcarrier set are dedicated to both DL and UL). Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexibly usable between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframe 3 and subframe 4 are shown as having slot format 1 and slot format 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured to have a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the above description also applies to the 5G NR frame structure as TDD.

[0052] Figures 2A-2DA frame structure is shown, and aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include a mini-time slot, which may include 7, 4, or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For a normal CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (for power-constrained scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and the digital scheme. The digital scheme defines a subcarrier spacing (SCS) (see Table 1). Symbol length / duration may be scaled by 1 / SCS.

[0053]

[0054] Table 1 Digital scheme, SCS and CP

[0055] For normal CP (14 symbols / slot), different digital schemes μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, digital scheme 2 allows 4 slots per subframe. Therefore, for normal CP and digital scheme μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is digital scheme 0 to 4. Thus, digital scheme μ=0 has a subcarrier spacing of 15kHz, and digital scheme μ=4 has a subcarrier spacing of 240kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figure 2A-2D An example is provided for a normal CP with 14 symbols per slot and a digital scheme μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP can have a specific numbering scheme and CP (normal or extended).

[0056] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB), also known as a physical RB (PRB), which extends over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE may depend on the modulation scheme.

[0057] like Figure 2A As shown in , some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) for channel estimation at the UE (indicated as R for a specific configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0058] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in one OFDM symbol of an RB. The PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on the CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The UE 104 uses the PSS to determine subframe / symbol timing and physical layer identification. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The UE uses the SSS to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also called SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent via the PBCH (e.g., system information block (SIB)), and paging messages.

[0059] like Figure 2CAs shown, some REs carry DM-RS (denoted as R for a specific configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE can send DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be sent in the first one or two symbols of the PUSCH. In different configurations, the PUCCH DM-RS can be sent depending on whether a short PUCCH or a long PUCCH is sent and according to the specific PUCCH format used. The UE can send a sounding reference signal (SRS). The SRS can be sent in the last symbol of the subframe. The SRS can have a comb structure, and the UE can send the SRS on one of these combs. The SRS can be used by the base station for channel quality estimation to achieve frequency-related scheduling on the UL.

[0060] Figure 2D An example of various UL channels within one subframe of a frame is shown. The PUCCH may be positioned as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0061] Figure 33 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, Internet Protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, splicing, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0062] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1 including the physical (PHY) layer may include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The Tx processor 316 processes the mapping for the signal constellation diagram based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time domain and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes, as well as spatial processing. The channel estimates may be derived from a reference signal and / or channel state feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0063] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (Rx) processor 356. The Tx processor 368 and the Rx processor 356 implement layer 1 functions associated with various signal processing functions. The Rx processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be merged into a single OFDM symbol stream by the Rx processor 356. The Rx processor 356 then uses a fast Fourier transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal may include a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0064] The controller / processor 359 may be associated with a memory 360 for storing program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0065] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides: RRC layer functions associated with: system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with: header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with: transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with: mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0066] The Tx processor 368 may use channel estimates derived by the channel estimator 358 from a reference signal or feedback sent by the base station 310 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the Tx processor 368 may be provided to different antennas 352 via respective transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0067] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its corresponding antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to an Rx processor 370.

[0068] The controller / processor 375 may be associated with a memory 376 for storing program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0069] At least one of the Tx processor 368, the Rx processor 356, and the controller / processor 359 may be configured to combine Figure 1 The PDU profile selection component 198 performs various aspects.

[0070] At least one of the Tx processor 316, the Rx processor 370, and the controller / processor 375 may be configured to combine Figure 1 The RRC profile configuration component 199 is used to perform various aspects.

[0071] Figure 4 400 is a diagram showing an example of a UE 402 configured to utilize multiple TRPs of a network, TRP 406 and TRP 408 to send and receive data. TRP 406 and TRP 408 may be controlled by a common network node 404, which may use TRP 406 or TRP 408 to communicate (send and receive data) with UE 402. TRP 406 and TRP 408 may be, for example, two different RUs with a common DU, two different RUs with two different DUs with a common CU, or two different RUs in two different DUs with two different CUs of a common core network. Each of TRP 406 and TRP 408 may be a panel, or may be a separate TRP. TRP 406 may send a signal 407 that may be received by UE 402. TRP 408 may send a signal 409 that may be received by UE 402. UE may send a signal 403 that may be received by TRP 406 and / or TRP 408. Diagram 400 illustrates an example of a UE 402 configured to access a network using mTRPs for communication with a network node 404. Although the network node 404 is illustrated as communicating with the UE 402 using two TRPs, in other aspects, the network node 404 may communicate with the UE 402 using more than two TRPs.

[0072] In some aspects, the network node 404 may use a single TRP (sTRP) such as TRP 406 or TRP 408 to send data to the UE 402. However, the number of ports that the sTRP can use to send data to the UE 402 may be limited. For example, the network node 404 may not be able to send data to the UE 402 using 32 ports via the sTRP because an antenna array with 32 ports may be too large for practical deployment. This is especially true for antenna arrays using low frequency bands. The network node 404 may use multiple TRPs (mTRPs) to send data to the UE 402, such as by using TRP 406 and TRP 408 to send data simultaneously to increase the number of ports that the network node 404 can use. The network node 404 can be configured to use mTRPs to send data to the UE 402 in a variety of ways.

[0073] In some aspects, the network node 404 may be configured to transmit data to the UE 402 in the mTRP network using non-coherent joint transmission (NCJT). In other words, data transmitted from the network node 404 to the UE 402 may be precoded separately at the TRP 406 and the TRP 408. For example, if the TRP 406 may have a precoded state using the precoder V A Encoded input X A , and TRP 408 has a pre-decoder V B Encoded input X B , then the precoding for transmission to UE 402 can be represented by

[0074]

[0075] In the above precoder calculation, if TRP 406 has a rank indicator (RI) of 1 and TRP 408 has an RI of 2, then the matrix X n Can have dimensions (RI TRP ×1), where X A :1×1 and X B :2×1. Similarly, the matrix V n Can have dimensions Where V A :4×1 and V B :4×2. However, if the network node 404 transmits data to the UE 402 via TRP 406 and TRP 408 using NCJT, the precoder used for TRP 406 and the precoder used for TRP 408 may not have any consistency with each other. Each precoder can be regarded as a different layer, each precoder having its own rank.

[0076] In other aspects, network node 404 may be configured to transmit data to UE 402 in an mTRP network using coherent joint transmission (CJT). In other words, data transmitted from network node 404 to UE 402 may be jointly precoded at TRP 406 and TRP 408. For example, if TRP 406 has a precoded address using precoder V A Encoded input X A , and TRP 408 has a pre-decoder V B Encoded input X B , then the precoding used for transmission to UE 402 can be represented by:

[0077]

[0078] In the above precoder calculation, if TRP 406 has a rank indicator (RI) of 1 and TRP 408 has an RI of 2, then the matrix X may have dimensions Where X: 2×1. Similarly, the matrix V n Can have dimensions Where V A :4×2 and V B :4×2. If the network node 404 transmits data to the UE 402 via the TRP 406 and the TRP 408 using CJT, the precoder for the TRP 406 and the precoder for the TRP 408 may have phase consistency with each other. The UE 402 and the network node 404 may be configured to configure the CJT using the CSI so that the network node 404 can use a greater number of ports on the TRP for CJT in the low frequency band.

[0079] The network node 404 and the UE 402 may configure CJT using channel state information (CSI) sent from the UE 402 to the network node. For example, the UE 402 may use the CSI to indicate a spatial domain (SD) basis (e.g., selecting a port from a set of TRPs) or a frequency domain (FD) basis (e.g., selecting a frequency from a set of frequency bands or sub-bands) of CJT using TRPs 406 and TRPs 408. In another example, in the case where the network node 404 is connected to a set of TRPs, the UE 402 may select a combination of TRPs to send data to the UE 402, such as two TRPs from a set of eight possible TRPs.

[0080] In some aspects, the network node 404 may be in a state where it may not be desirable for the UE 402 to freely select any combination of TRPs that can send data to the UE 402. For example, if TRP 406 is dedicated to a high-bandwidth task for a period of time, the network node 404 may not want the UE 402 to select TRP 406 for transmission to the UE 402. In addition, CSI indicating an SD basis for an mTRP may have a larger reporting overhead than indicating an SD basis for an sTRP. An mTRP transmission has more ports that can be used than an sTRP transmission, which increases the overhead of indicating port selection for an mTRP CSI transmission. In addition, the number of possible combinations of SD bases that the UE 402 can select for both TRP 406 and TRP 408 can be higher than the number of possible combinations of SD bases that the UE 402 can select for TRP 408 without TRP 408, which can mean more bits to indicate the selection. To minimize the overhead for UE 402 to configure CJT, e.g., to indicate the selection of an SD basis from an expected set of SD bases, network node 404 may be configured to provide UE 402 with a CSI configuration having a reduced set of profiles that UE 402 may select. UE 402 may then select one or more profiles from the reduced set of profiles and send an indication of the selection as CSI to network node 404, which may then use the CSI to configure CJT.

[0081] The network node 404 may send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. The UE 402 may receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs (e.g., TRP 406 and TRP 408). The UE 402 may select an SD profile from the set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. The UE 402 may send CSI to the network node 404 including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers. The network node 404 may receive CSI including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers.

[0082] In one aspect, a type-II precoder for a layer of a TRP (e.g., TRP 406 or TRP 408) may be provided by Represents, where W1 can represent SD-based selection (i.e., SD-based selection), It can represent the Hermitian conjugation based on the FD selection (i.e., FD basis selection) and The coefficients can be represented. For each layer, the precoder W can be Nt ×N3 matrix, where N3 may be the number of precoding matrix indicator (PMI) subbands, and N t It can be the number of transmit antennas. For up to four layers or RI can be common between each layer (for example, each layer of a multi-layer precoder can have the same W1 matrix). The SD basis W1 can be selected from a set of discrete Fourier transform (DFT) bases and can be N t ×2L matrix, where N t W may be the number of transmit antennas, and L may be the number of beams. f It can be specific to a layer (e.g., each layer of a multi-layer precoder can have a different W f matrix, although at least two layers can have the same W f matrix). Coefficients It can also be layer-specific (e.g., each layer of a multi-layer precoder can have a different matrix, although at least two layers can have the same matrix). From it, select the possible SD basis of W1 and from it select W f Possible FD bases and coefficients and / or the number of beams L may be configured by the network (e.g., network node 404). Such CSI configuration may be provided via RRC signaling. In some aspects, UE 402 may select an SD basis W1 from possible SD basis and / or select an FD basis W from possible FD basis. f , or the network node 404 may configure the SD basis W1 and the FD basis W f .

[0083] In another aspect, the FD joint precoder for one layer of each of TRP 406 and TRP 408 may be represented by

[0084]

[0085] In the above precoder calculation, W TRP#A The codebook structure for the layer of TRP 406 may be represented as W TRP#B The codebook structure for the layers of TRP 408 may be represented. 1,A The SD basis selection for TRP 406 may be represented by 1,B may represent the SD base selection for TRP 408, The Hermitian conjugation for the joint FD basis selection for both TRP 406 and TRP 408 can be represented as, The coefficients for TRP 406 may be represented as, and The coefficients for TRP 408 may be represented by the overall joint precoder It may not be diagonal, such as Such a precoder may be used for co-located or intra-site TRPs. For example, TRP 406 and TRP 408 may be two panels co-located on the same rack. TRP 406 and TRP 408 may be panels of a multi-panel surface with the same orientation. TRP 406 and TRP 408 may be panels with different orientations or sectors. Such a precoder may also be referred to as an FD joint codebook for CJT. W is selected from 1,A and / or W 1,B Possible SD bases, from which W is selected f Possible FD bases and coefficients The number of beams L and / or beams L may be configured by the network, such as the network node 404. In some aspects, the UE 402 may select an SD basis W from possible SD basis. 1,A and / or W 1,B , we can select a FD basis W from the possible FD bases f , and / or the number of beams L may be selected for each of the TRPs 406 and / or 408. In other aspects, the network node 404 may configure the SD basis W for each of the TRPs 406 and / or 408. 1,A ,SD base W 1,B , FD base W f and / or the number of beams L.

[0086] In another aspect, the FD independent precoder for one layer of each of TRP 406 and TRP 408 may be represented by

[0087]

[0088] In the above example, W TRP#A The codebook structure for the layer of TRP 406 can be represented by TRP#B The codebook structure for the layers of TRP 408 may be represented. 1,A The SD basis selection for TRP 406 may be represented by 1,B It can represent the SD base selection for TRP408, The Hermitian conjugation selected for the FD basis of TRP 406 can be represented by The Hermitian conjugation selected for the FD basis of TRP408 can be represented by The coefficients for TRP 406 may be represented as, and may represent the coefficient for TRP 408, and q may represent the co-phase or co-amplitude coefficient. is diagonal, such as Such a precoder can be used for distributed or inter-site TRPs. For example, TRP 406 and TRP 408 can be panels mounted to different structures, or can be antennas at least 20 meters apart. This precoder can also be called an FD independent codebook for CJT. 1,A and / or W 1,B Possible SD bases to choose from and / or Possible FD bases and coefficients q and / or the number of beams L may be configured by the network, such as the network node 404. In some aspects, the UE 402 may select an SD basis W from among possible SD basis 1,A and / or W 1,B , we can select a FD basis W from the possible FD bases f , and / or the number of beams L may be selected for each of the TRPs 406 and / or 408. In other aspects, the network node 404 may configure the SD basis W for each of the TRPs 406 and / or 408. 1,A ,SD base W 1,B , FD base W f and / or the number of beams L.

[0089] Figure 5 5 is a diagram 500 showing an example of a first portion 510 and a second portion 520 of CSI. The first portion 510 of the CSI may have a fixed size or number of bits. If the first portion 510 of the CSI has a fixed size, a network node (e.g., Figure 4 The network node 404 in (e.g., 404) may easily decode the first part 510. The first part 510 of the CSI may have a rank indicator (RI) field 512 indicating the rank of the CJT. The first part 510 of the CSI may have a channel quality indicator (CQI) field 514 indicating the CQI of the CJT. The first part 510 of the CSI may have a non-zero coefficient (NZC) field 516, which may indicate the total number of NZCs across all layers. The first part 510 of the CSI may have a CSI profile selection field 518, which may indicate one or more CSI profiles that the CJT may use. The CSI profile may be, for example, an SD profile and / or an FD profile. Each SD profile may be associated with multiple SD basis numbers for each of a plurality of TRPs. Each FD profile may be associated with multiple FD basis numbers for each of a plurality of TRPs. The CSI profile selection field 518 may indicate a selection of an SD profile associated with multiple SD basis numbers for each of a plurality of TRPs, and the network node (e.g., 404) may select one of the SD profiles associated with the multiple SD basis numbers for each of a plurality of TRPs. Figure 4The network node 404 in the example may use the multiple TRPs to send a message to the UE (e.g. Figure 4 UE 402 in sends CJT.

[0090] Based on the first part 510 of the CSI, the second part 520 of the CSI can have a variable size or a variable number of bits. For example, the selection of the first CSI profile in the CSI profile selection field 518 can indicate a first size of the second part 520 of the CSI, and the selection of the second CSI profile in the CSI profile selection field 518 can indicate a second size of the second part 520 of the CSI. The second part 520 of the CSI can have an SD beam selection field 522, which can indicate a selection of an SD basis. In other words, the SD beam selection field 522 can indicate L beams out of N1N2O1O2 total beams for each TRP, where N1 can be the number of columns for the ports of the TRP, N2 can be the number of rows for the ports of the TRP, and O1O2 can represent the oversampling group for the TRP. In some aspects, N1N2=N t , where N t is the number of ports for the TRP. The size of the SD beam selection field 522 may vary based on the CSI profile selected in the CSI profile selection field 518.

[0091] The second part 520 of the CSI may have an FD basis selection field 524 that indicates the FD basis set selected for the layer set corresponding to the CJT. The FD basis selection field 524 may indicate the selected FD basis for each layer in the layer set ranging from 0 to RI-1, where RI is the rank indicator of the CJT. In other words, the FD basis selection field 524 may select M for each layer from N3 bases. RI basis, where RI represents the rank of the layer, M represents the M value for the FD codebook, and N3 represents the total number of precoding matrices indicated by the PMI. The size of the FD basis selection field 524 may vary based on the CSI profile selected in the CSI profile selection field 518 in the first part 510 of the CSI. The second part 520 of the CSI may have a strongest coefficient indication (SCI) field 526, which indicates the SCI set for the layer set corresponding to the CJT. The SCI field 526 may indicate the selected SCI for each layer in the layer set ranging from 0 to RI-1, where RI is the rank indicator of the CJT. In other words, the SCI field 526 may indicate the location of the strongest coefficient. The second part 520 of the CSI may have a coefficient selection field 528, which indicates the position of the strongest coefficient for NZC in the layer set corresponding to the CJT. The coefficient selection field 528 may indicate the position of the NZC for each layer in the layer set ranging from 0 to RI-1, where RI is the rank indicator of the CJT. In other words, the coefficient selection field 528 may indicate the position of the NZC in or l, where l indicates a layer of the TRP. The second portion 520 of the CSI may have a quantization 530 of the NZC field, which indicates an amplitude and / or phase quantization of a set of layers corresponding to the CJT. The quantization 530 of the NZC field may indicate an amplitude and / or phase quantization of each layer in the set of layers ranging from 0 to RI-1, where RI is a rank indicator of the CJT. In other words, the quantization 530 of the NZC field may indicate an amplitude and / or phase quantization of one or more NZCs.

[0092] Figure 6 6 is a connection flow diagram 600 illustrating an example of a UE 602 configured to select a CSI profile from a CSI configuration 610 sent by a network node 604 .

[0093] UE 602 may send UE capabilities 606 to network node 604. Network node 604 receives UE capabilities 606 from UE 602. UE capabilities 606 may indicate a maximum configurable value of a CSI profile that UE 602 may use to select a CSI profile. For example, UE capabilities 606 may indicate that UE 602 may select from a maximum of 32 SD profiles, or UE capabilities 606 may indicate that UE 602 may select from a maximum of 16 SD profiles. The maximum configurable value of the UE capability may be referred to as N profile , where log2 N can be used profile bit to indicate the selection. In other words, Figure 5 The number of bits in the CSI profile selection field 518 may be determined by N profile The value of is indicated.

[0094] At 608, the network node 604 may configure a CSI configuration 610 for the UE 602. The CSI configuration 610 may include a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. For example, Table 1 below may represent a CSI configuration for a CJT with four TRPs.

[0095]

[0096]

[0097] Table 1

[0098] The configured SD profile may include the number of SD bases selected for each TRP n (where n=1, 2, 3, and 4, for a total of four TRPs). In other words, if UE 602 selects SD Profile 0, TRP 1 may have two SD bases selected, TRP 2 may have two SD bases selected, TRP 3 may have two SD bases selected, and TRP 4 may have two SD bases selected. If UE 602 selects SD Profile 1, TRP 1 may select four SD bases, TRP 2 may select two SD bases, TRP 3 may select two SD bases, and TRP 4 may select zero SD bases. In other words, for SD Profile 1, UE 602 reports TRP selections for TRP 1, 2, and 3 without TRP 4. In some aspects, L n Each value of may be greater than zero, thereby allowing the UE 602 to select at least one SD basis number for each of the multiple TRPs. This ensures that the UE 602 uses a combination of network configurations for the TRPs. In some aspects, the network node 604 may set the total number of possible SD bases (L) for each SD profile in the CSI configuration. tot ) are configured to be the same. For example, L for each SD profile tot L may be equal to 8, thereby allowing the UE to select a total of 8 SD bases across all TRPs. In other aspects, the network node 604 may set L for each SD profile in the CSI configuration to tot For example, for L of SD profile 1 in Table 1 tot is 8, and the L of the maximum ID SD profile in Table 1 tot Serves 6.

[0099] The CSI configuration 610 may also define one or more rules that the number of FD bases may follow. The number of FD bases may be determined based on the selected SD profile. For example, the CSI configuration 610 may define the total number of selected FD bases (M tot ) can be the same for different numbers of TRPs selected (e.g., M tot The CSI configuration 610 may allow the UE 602 to select a first portion of the CSI 616 (e.g., Figure 5 The first part 510 of the CSI in the UE determines M for each TRP selected by the UE. tot (for FD independent codebook), M union (for FD joint codebook) and / or each M n .

[0100] In one aspect, for FD independent codebooks, CSI configuration 610 may be configured to calculate M tot Defined as Where N may be the number of TRPs selected by UE 602, and M n The FD-based number of TRP n may be indicated. N may be less than or equal to the total number of TRPs that the UE may select based on a table such as Table 1. The CSI configuration 610 may indicate the nominal total number of configurations, M. tot,nominal Or reference value. tot,nominal Can be less than or equal to M tot In some aspects, CSI configuration 610 may divide M equally for each TRP. n For example, or In other aspects, CSI configuration 610 may be associated with L n Divide M proportionally n For example, or In other words, more beams may mean more delay paths.

[0101] In one aspect, for the FD joint codebook, the CSI configuration 610 may define M union , the M union will be calculated as the number of FD basis sets in the union of all selected FD basis sets for all selected TRPs. In one aspect, CSI configuration 610 may indicate that M is equal for all TRPs. n , so that all selected TRPs have the same M n In other words, the value of N, which may be equal to the number of TRPs selected by UE 602, may not affect M. n The value of M n =M union FD base selection field (e.g. Figure 5 The FD basis selection field 524 in the CSI configuration 610 may also be empty, because the UE 602 may not need to select any FD basis. In another aspect, the CSI configuration 610 may allow each TRP to have the same number of FD basis (e.g., each TRP has M FD basis). n =γM union FD basis, where 0<γ<1), and the UE can select a FD basis set for each TRP. For example, or The CSI configuration 610 may indicate the nominal total number of configurations M tot,nominal In other words, more beams may mean more delay paths.

[0102] In some aspects, CSI configuration 610 may include setting M tot,nominal or M union The value of M is defined as a function of the M value parameter set. The UE 602 and / or the network node 604 can use the M value parameter to calculate M tot,nominal or M union The value of M is used to define an FD codebook, such as an FD independent codebook or an FD joint codebook. For example, the following Table 2 may represent the M value for the FD codebook (e.g., M tot,nominal or M union )’s CSI configuration.

[0103]

[0104] Table 2

[0105] For example, if UE 602 receives Table 2 above as CSI configuration 610, the M value (eg, M tot,nominal or M union ) can be calculated as Wherein the value of R may represent the number of PMI subbands per CQI subband, and N3 may represent the total number of precoding matrices indicated by the PMI. N3 may be based on the value of R. The value of R may be configured by CSI configuration 610. In other words, the value of M may be calculated based on the RI value. For a pair of ranks, the value of M may be the same, for example, the value of M for RI=1 or 2 may be the same, and the value of M for RI=3 or 4 may also be the same.

[0106] The network node 604 may send a CSI configuration 610 to the UE 602. The UE 602 may receive the CSI configuration 610 from the network node 604. The CSI configuration 610 may be RRC configured. In other words, the network node 604 may send an RRC signal including the CSI configuration 610 to the UE 602.

[0107] The network node 604 may send at least one CSI-RS 611 to the UE 602. The UE 602 may receive the at least one CSI-RS 611 from the network node 604. At 622, the UE 602 may measure the at least one CSI-RS 611. The UE 602 may measure the at least one CSI-RS 611 based on the CSI configuration 610.

[0108] At 612, UE 602 may select an SD profile and / or an SD basis based on CSI configuration 610 and at least one CSI-RS 611. For example, UE 602 may select an SD profile from a table similar to Table 1, which may determine how many SD basis (i.e., SD basis number) UE 602 may select in each of a plurality of TRPs. UE 602 may also select an SD basis for each of the SD basis numbers associated with each of the plurality of TRPs. The selected SD profile may be selected in a table such as Figure 5 The selected SD basis may be indicated in the SD beam selection field (e.g. Figure 5 As indicated in the SD beam selection area 522).

[0109] At 614, UE 602 may calculate an FD profile and / or select an FD basis based on CSI configuration 610. For example, UE 602 may follow one of the above rules to calculate the M for each TRP selected for the SD basis. n , which may determine how many FD bases (i.e., the number of FD bases) the UE 602 may select from each of the multiple TRPs. The UE 602 may select the FD bases based on the M for each of the multiple TRPs. n The value of is used to select the FD basis.

[0110] The UE 602 may send the compressed CSI 616 to the network node 604. The network node 604 may receive the CSI 616 from the UE 602.

[0111] At 618, the network node 604 may decode the CSI 616. The network node 604 may first decode the first portion of the CSI and then decode the second portion of the CSI. The first portion of the CSI 616 may be a fixed size. The CSI 616 may include selecting an SD profile from a set of SD profiles in the CSI configuration 610. The first portion of the CSI 616 may include selecting an SD profile from a set of SD profiles in the CSI configuration 610. Figure 5 The size of the CSI profile selection field 518 in the CSI configuration 610 may be based on the number of SD profiles in the CSI configuration 610. The size of the CSI profile selection field may be calculated as Where N profile is the number of SD profiles in the CSI configuration 610 (e.g., with respect to Table 1 above, maximum ID+1). The first part of the CSI may have an RI field indicating the rank of the CJT, e.g. Figure 5512 in the RI field. In some aspects, for FD independent codebooks, the RI field may indicate a common rank for all TRPs. In other aspects, the RI field may indicate multiple ranks, one for each TRP. The UE 602 may be configured to maintain the same or similar FD basis population across all layers to provide similar reporting overhead. For example, a TRP with a higher rank may have a smaller M than another TRP with a lower rank. n In other words, a TRP with rank 1 can have a larger M n value, and a TRP with rank 2 can have a smaller M n value.

[0112] The size of the second portion of the CSI may be variable based on one or more values ​​in the first portion of the CSI (e.g., an SD profile selected from a set of SD profiles in the CSI configuration 610). Figure 5 The size of the SD beam selection field 522 in the SD Beam Selection field 522 may be based on the number of beam oversampling groups (O1O2) and / or the number of SD bases selected (L) compared to the number of ports for the TRP (N1N2). n ). N1 may be the number of columns of ports for TRP, and N2 may be the number of rows of ports for TRP, such that N1N2=N t , where N t is the number of ports for TRP, where N t is the number of ports of the TRP. In some aspects, N t There may be an equal number of ports per polarization for each TRP. In one aspect, the size of the SD selection field may be based on each L n Calculated as bits to select L from the total number of N1N2 for each TRP from n=1 to N n SD basis, where N is the total number of selected TRPs. In one aspect, the size of the SD selection field may be calculated based on the oversampled group selection as log2 O1O2 bits for each TRP from n=1 to N, where N is the total number of selected TRPs.

[0113] FD base selection field (e.g. Figure 5 The size of the FD basis selection field 524 in the FD joint codebook may be based on the total number of precoding matrices indicated by the PMI compared to the M value. In one aspect, for the FD joint codebook, the size of the FD basis selection field may be calculated as Bit or bits to select M from the total number of N3 or N3-1 for each layer tot or M tot-1 FD basis, where N3 may represent the total number of FD bases from the universe (which may also be the length of the FD basis), and M tot It can be calculated as M tot The value may be decremented by 1 to indicate that the SCI field (e.g. Figure 5 In some aspects, the size of the FD base selection field can be calculated as Bit or bits, where N3≤19 for each layer, and can be calculated based on a delay window with multi-level selection (e.g., two-level selection), where N3>19.

[0114] In one aspect, for the FD joint codebook or for the FD independent codebook, the size of the FD basis selection field may be calculated as Bit or bits to select M from the total number of N3 or N3-1 for each layer n or M n -1 FD basis, where N3 may represent the total number of precoding matrices indicated by the PMI, and M n The number of FD bases that can represent TRP n, where n can range from 1 to N selected TRPs. The value of N3 and M n The value may be decremented by 1 to indicate that the SCI field (e.g. Figure 5 In some aspects, the size of the FD base selection field can be calculated as Bit or bits, where N3≤19 for each layer, and can be calculated based on a delay window with multi-level selection (e.g., two-level selection), where N3>19. The position of the delay window can be determined by Bit or bits to indicate. n It may be different for different TRPs, so the delay window size may be different for different TRPs, because the delay window size can be based on 2M n .

[0115] The network node 604 may send at least one DL transmission 620 to the UE 602 based on the CSI 616. The UE 602 may receive at least one DL transmission 620 from the network node 604 based on the CSI 616.

[0116] Figure 7700 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, UE 350, UE 402, UE 602; apparatus 904). At 702, the UE may send UE capabilities including an indication of a maximum number of SD profiles. The number of SD profiles in the SD profile set may be based on the maximum number of SD profiles. For example, 702 may be performed by Figure 6 602 in the CSI configuration 610 may be executed, the UE 602 may send the UE capabilities 606 to the network node 604. The UE capabilities 606 may include an indication of the maximum number of SD profiles that the UE 602 can handle. The number of SD profiles in the SD profile set (e.g., the number of SD profiles in the CSI configuration 610) may be based on the maximum number of SD profiles indicated by the UE capabilities 606. In addition, 702 may be performed by Fig. 9 Component 198 in is executed.

[0117] At 704, the UE may receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. For example, 704 may be performed by Figure 6 602 in the UE 602, the UE 602 may receive a CSI configuration 610 from a network node 604. The CSI configuration 610 may include a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs, such as Table 1 above. In addition, 704 may be performed by Fig. 9 Component 198 in is executed.

[0118] At 706, the UE may receive RRC signaling including the CSI configuration. For example, 706 may be performed by Figure 6 602 in the embodiment, the UE 602 may receive RRC signaling including CSI configuration 610 from the network node 604. In addition, 706 may be performed by Fig. 9 Component 198 in is executed.

[0119] At 708, the UE may receive at least one CSI-RS from the network node based on the CSI configuration. For example, 708 may be performed by Figure 6 602 in the UE 602, the UE 602 may receive at least one CSI-RS 611 from the network node 604 based on the CSI configuration 610. In addition, 708 may be performed by Fig. 9 Component 198 in is executed.

[0120] At 710, the UE may measure at least one CSI-RS after receiving the at least one CSI-RS from the network node. The selected SD profile may be selected based on the measured at least one CSI-RS. For example, 710 may be performed by Figure 66, the UE 602 may measure the at least one CSI-RS 611 after receiving the at least one CSI-RS 611 from the network node 604 at 622. At 612, the UE 602 may select the SD profile from the CSI configuration 610 based on the measured at least one CSI-RS 611. In addition, 714 may be performed by Fig. 9 Component 198 in is executed.

[0121] At 712, the UE may select an SD profile from a set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. Figure 6 602 in the CSI configuration 610, the UE 602 may select an SD profile from a set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration 610 at 612. In addition, 712 may be performed by Fig. 9 Component 198 in is executed.

[0122] At 714, the UE may calculate a plurality of FD base numbers for each of the plurality of TRPs based on the selected SD profile. For example, 714 may be composed of Figure 6 UE 602 in 614 may calculate one or more FD basis numbers for each TRP in the plurality of TRPs based on the SD profile selected at 612. In addition, 714 may be performed by Fig. 9 Component 198 in is executed.

[0123] Figure 8 800 is a flow chart of a method of wireless communication. The method may be performed by a network node (e.g., base station 102, base station 310; network node 404, network node 604; network entity 902, network entity 1002, network entity 1160). At 802, the network node may receive UE capabilities including an indication of a maximum number of SD profiles. The number of SD profiles in the SD profile set may be based on the maximum number of SD profiles. For example, 802 may be performed by Figure 6 802 may be performed by a network node 604 in which UE 602 receives UE capabilities 606 from UE 602. The UE capabilities may include an indication of a maximum number of SD profiles that UE 602 can handle. The number of SD profiles in the SD profile set may be based on the maximum number of SD profiles indicated in UE capabilities 606. In addition, 802 may be performed by a network node 604 in which UE 602 receives UE capabilities 606 from UE 602. The UE capabilities may include an indication of a maximum number of SD profiles that UE 602 can handle. Fig.10 or component 199 in 11 to execute.

[0124] At 804, the network node may send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. For example, 804 may be sent by Figure 6804 may be performed by a network node 604 in which a CSI configuration 610 may be sent to a UE 602. The CSI configuration 610 may include a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. Fig.10 or component 199 in 11 to execute.

[0125] At 806, the network node may send RRC signaling including the CSI configuration. For example, 806 may be performed by Figure 6 The network node 604 in the embodiment may send RRC signaling including CSI configuration 610 to the UE 602. In addition, 806 may be performed by Fig.10 or component 199 in 11 to execute.

[0126] At 818, the network node may send at least one CSI-RS to the UE based on the CSI configuration. The selected SD profile may be selected based on the CSI-RS. For example, 818 may be performed by Figure 6 The network node 604 in the embodiment may send at least one CSI-RS 611 to the UE 602 based on the CSI configuration 610. At 612, the UE 602 may select an SD profile from the CSI configuration 610 based on the CSI-RS. In addition, 818 may be performed by Fig.10 or component 199 in 11 to execute.

[0127] At 808, the network node may receive CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers. The CSI may be received from a UE. For example, 808 may be received by Figure 6 6, which may be performed by a network node 604 in which CSI 616 may be received from UE 602. CSI 616 may include an SD profile selected at 612 from a set of SD profiles associated with a plurality of SD base numbers. In addition, 808 may be performed by Fig.10 or component 199 in 11 to execute.

[0128] At 810, the network node may decode the first portion of the CSI to determine the selected SD profile. The payload size of the second portion of the CSI may be based on the selected SD profile. For example, 810 may be determined by Figure 6 The network node 604 in 610 may decode the first part of the CSI 616 at 618 to determine the selected SD profile. The payload size of the second part of the CSI 616 may be based on the selected SD profile. In addition, 810 may be performed by Fig.10 or component 199 in 11 to execute.

[0129] At 812, the network node may decode the second portion of the CSI based on the payload size to determine the selected SD basis. For example, 812 may be performed by Figure 6 The network node 604 in 618 may decode the second part of the CSI 616 based on the payload size. The second part of the CSI 616 may include the selected SD basis. In addition, 812 may be performed by Fig.10 or component 199 in 11 to execute.

[0130] At 814, the network node may calculate a plurality of FD basis numbers for each of the plurality of TRPs based on the selected SD profile. For example, 814 may be performed by Figure 6 The network node 604 in 618 may calculate a plurality of FD basis numbers for each of the plurality of TRPs based on the selected SD profile, similar to the UE 602 at 614. In addition, 814 may be performed by Fig.10 or component 199 in 11 to execute.

[0131] At 816, the network node may send at least one DL transmission for the UE based on the selected SD profile. For example, 816 may be performed by Figure 6 The network node 604 in 616 may send at least one DL transmission 620 to the UE 602. The at least one DL transmission 620 may be sent based on the selected SD profile in the CSI 616. In addition, 816 may be performed by Fig.10 or component 199 in 11 to execute.

[0132] Fig. 9900 is a schematic diagram illustrating an example of a hardware implementation for an apparatus 904. The apparatus 904 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 904 may include a cellular baseband processor 924 (also referred to as a modem) coupled to one or more transceivers 922 (e.g., a cellular RF transceiver). The cellular baseband processor 924 may include on-chip memory 924'. In some aspects, the apparatus 904 may further include one or more subscriber identity module (SIM) cards 920 and an application processor 906 coupled to a secure digital (SD) card 908 and a screen 910. The application processor 906 may include on-chip memory 906'. In some aspects, the device 904 may further include a Bluetooth module 912, a WLAN module 914, an SPS module 916 (e.g., a GNSS module), one or more sensor modules 918 (e.g., a barometric pressure sensor / altimeter; a motion sensor such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 926, a power supply 930, and / or a camera 932. The Bluetooth module 912, the WLAN module 914, and the SPS module 916 may include an on-chip transceiver (TRX) (or in some cases, just a receiver). The Bluetooth module 912, the WLAN module 914, and the SPS module 916 may include their own dedicated antennas and / or communicate using an antenna 980. The cellular baseband processor 924 communicates with the UE 104 and / or the RU associated with the network entity 902 via one or more antennas 980 through the transceiver 922. The cellular baseband processor 924 and the application processor 906 may include computer-readable media / memory 924', 906', respectively. The additional memory module 926 may also be considered as a computer-readable medium / memory. Each computer-readable medium / memory 924', 906', 926 may be non-temporary. The cellular baseband processor 924 and the application processor 906 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. When the software is executed by the cellular baseband processor 924 / application processor 906, the cellular baseband processor 922 / application processor 904 performs the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 924 / application processor 906 when executing the software. The cellular baseband processor 924 / application processor 906 may be a component of the UE 350 and may include the memory 360 and / or at least one of the Tx processor 368 , the Rx processor 356 , and the controller / processor 359 .In one configuration, the device 904 may be a processor chip (modem or application) and include only the cellular baseband processor 924 / application processor 906, while in another configuration, the device 904 may be the entire UE (eg, see. Figure 3 .350) and includes additional modules of device 904.

[0133] As described above, component 198 is configured to receive a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. Component 198 may be configured to select an SD profile from the set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. Component 198 may be configured to send CSI to a network node, the CSI including an SD profile selected from the set of SD profiles associated with a plurality of SD base numbers. In certain aspects, base station 102 may have a CSI profile configuration component 199 configured to send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. Component 198 may be within the cellular baseband processor 924, the application processor 906, or within both the cellular baseband processor 924 and the application processor 906. Component 198 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. As shown, the device 904 may include various components configured for various functions. In one configuration, the device 904, in particular the cellular baseband processor 924 and / or the application processor 906, includes a unit for receiving a CSI configuration, the CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each TRP in a plurality of TRPs. The device 904 may include a unit for selecting an SD profile from a set of SD profiles associated with a plurality of SD base numbers included in the CSI configuration. The device 904 may include a unit for sending CSI to a network node, the CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers. The device 904 may include a device for receiving at least one CSI-RS from a network node based on the CSI. The device 904 may include a unit for measuring the at least one CSI-RS after receiving the at least one CSI-RS from the network node. The device 904 may include a device for sending UE capabilities, the UE capabilities including an indication of the maximum number of SD profiles. The device 904 may include a unit for calculating multiple FD base numbers for each TRP in a plurality of TRPs based on the selected SD profile. The device 904 may include a unit for receiving a CSI configuration by receiving RRC signaling including the CSI configuration. The unit may be a component 198 of the device 904 configured to perform the functions described by the above-mentioned unit. As described above, the device 904 may include a Tx processor 368, an Rx processor 356, and a controller / processor 359. Thus, in one configuration, the unit may be a Tx processor 368, an Rx processor 356, and a controller / processor 359 configured to perform the functions described by the unit.

[0134] Fig.10 1000 is a diagram illustrating an example of a hardware implementation for an apparatus 1002. The network entity 1002 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1002 may include at least one of a CU 1010, a DU 1030, or a RU 1040. For example, depending on the layer functionality handled by the component 199, the network entity 1002 may include a CU 1010; both a CU 1010 and a DU 1030; each of the CU 1010, the DU 1030, and the RU 1040; the DU 1030; both a DU 1030 and a RU 1040; or the RU 1040. The CU 1010 may include a CU processor 1012. The CU processor 1012 may include an on-chip memory 1012'. In some aspects, the CU 1010 may further include an additional memory module 1014 and a communication interface 1018. CU1010 communicates with DU 1030 via a mid-haul link such as an F1 interface. DU 1030 may include a DU processor 1032. DU processor 1032 may include on-chip memory 1032'. In some aspects, DU 1030 may further include an additional memory module 1034 and a communication interface 1038. DU 1030 communicates with RU 1040 via a front-haul link. RU 1040 may include a RU processor 1042. RU processor 1042 may include on-chip memory 1042'. In some aspects, RU 1040 may further include an additional memory module 1044, one or more transceivers 1046, an antenna 1080, and a communication interface 1048. RU 1040 communicates with UE 104. Each of the on-chip memories 1012', 1032', 1042' and the additional memory modules 1014, 1034, 1044 can be considered as a computer-readable medium / memory. Each computer-readable medium / memory can be non-temporary. Each of the processors 1012, 1032, 1042 is responsible for general processing, which includes executing software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the processor when executing the software.

[0135] As described above, component 199 is configured to send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. Component 199 may be configured to receive CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers. The CSI may be received from a UE. Component 199 may be within one or more processors of one or more of CU 1010, DU 1030, and RU 1040. Component 199 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. Network entity 1002 may include various components configured for various functions. In one configuration, network entity 1002 includes a unit for sending a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each of a plurality of TRPs. The network entity 1002 may include a unit for receiving CSI, the CSI including an SD profile selected from a set of SD profiles associated with multiple SD base numbers. The network entity 1002 may include a unit for sending a CSI configuration by sending RRC signaling including the CSI configuration. The network entity 1002 may include a unit for sending at least one CSI-RS for a UE based on the CSI configuration. The network entity 1002 may include a unit for receiving a UE capability, the UE capability including an indication of a maximum number of SD profiles. The network entity 1002 may include a unit for calculating multiple FD base numbers for each TRP in a plurality of TRPs based on the selected SD profile. The network entity 1002 may include a unit for decoding a first portion of the CSI to determine the selected SD profile. The payload size of the second portion of the CSI may be based on the selected SD profile. The network entity 1002 may include a unit for decoding the second portion of the CSI based on the payload size to determine the selected SD base. The network entity 1002 may include a unit for sending at least one DL transmission for the UE based on the selected SD profile. The network entity 1002 may include means for sending the at least one DL transmission based on the selected SD profile to the UE by sending at least one CSI-RS to the UE based on the CSI. The means may be a component 199 of the network entity 1002 configured to perform the functions recited by the means. As described above, the processing system 1002 may include at least one of the Tx processor 316, the Rx processor 370, and / or the controller / processor 375. Therefore, in one configuration, the means may be the Tx processor 316, the Rx processor 370, and the controller / processor 375 configured to perform the functions recited by the means.

[0136] Fig.11 1100 is a diagram showing an example of a hardware implementation for a network entity 1160. In one example, the network entity 1160 may be within the core network 120. The network entity 1160 may include a network processor 1112. The network processor 1112 may include an on-chip memory 1112'. In some aspects, the network entity 1160 may further include an additional memory module 1114. The network entity 1160 communicates with the CU 1102 directly (e.g., a backhaul link) or indirectly (e.g., through the RIC) via a network interface 1180. Each of the on-chip memory 1112' and the additional memory module 1114 may each be considered as a computer-readable medium / memory. Each computer-readable medium / memory may be non-temporary. The processor 1112 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0137] As described above, component 199 is configured to send a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each TRP in a plurality of TRPs. Component 199 may be configured to receive CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers. The CSI may be received from a UE. Component 199 may be within processor 1112. Component 199 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. Network entity 1160 may include various components configured for various functions. In one configuration, network entity 1160 includes a unit for sending a CSI configuration including a set of SD profiles associated with a plurality of SD base numbers for each TRP in a plurality of TRPs. Network entity 1160 may include a unit for receiving CSI including an SD profile selected from a set of SD profiles associated with a plurality of SD base numbers. The network entity 1160 may include a unit for sending a CSI configuration by sending RRC signaling including the CSI configuration. The network entity 1160 may include a unit for sending at least one CSI-RS for the UE based on the CSI configuration. The network entity 1160 may include a unit for receiving a UE capability, the UE capability including an indication of a maximum number of SD profiles. The network entity 1160 may include a unit for calculating a plurality of FD basis numbers for each TRP in a plurality of TRPs based on the selected SD profile. The network entity 1160 may include a unit for decoding a first portion of the CSI to determine the selected SD profile. The payload size of the second portion of the CSI may be based on the selected SD profile. The network entity 1160 may include a unit for decoding the second portion of the CSI based on the payload size to determine the selected SD basis. The network entity 1160 may include a unit for sending at least one DL transmission for the UE based on the selected SD profile. The network entity 1160 may include a unit for sending the at least one DL transmission for the UE based on the selected SD profile by sending at least one CSI-RS for the UE based on the CSI. A means may be a component 199 of the network entity 1160 configured to perform the functions recited by the means.

[0138] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is only an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not limited to the specific order or hierarchy provided.

[0139] The above description is provided so that any person skilled in the art can implement the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may also be applied to other aspects. Therefore, the claims are not limited to the aspects described herein, but are to be given the full scope consistent with the claim formulation. Unless otherwise specifically stated, reference to an element in the singular is not intended to mean "one and only one", but "one or more". Terms such as "if", "when" and "at..." do not imply a direct temporal relationship or reaction. That is, these phrases (e.g., "when ...") do not mean an immediate action in response to the occurrence of an action or during the occurrence of the action, but only mean that if the condition is met, the action will occur, but no specific or immediate time constraint is required for the occurrence of the action. The word "exemplary" is used herein to mean "used as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A and B," and "A, B, C, or any combination thereof" may be only A, only B, only C, or any combination thereof. , A and B, A and C, B and C or A and B and C, any such combination may contain one or more members of A, B or C, and the set should be interpreted as a set of elements whose element number is one or more. Therefore, for the set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, the data can be directly received / sent between the first device and the second device, or the data can be indirectly received / sent between the first device and the second device by a set of devices. All structural and functional equivalents of the elements of various aspects described throughout the present disclosure that are known or will be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is dedicated to the public, regardless of whether such disclosure is explicitly recorded in the claims. The words "module", "mechanism", "element", "device", etc. may not be a substitute for the word "unit". Thus, no claim element is to be interpreted as a unit plus function unless the element is explicitly recorded using the phrase "unit for ...".

[0140] As used herein, the phrase "based on" should not be interpreted as a reference to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, conditions, factors, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0141] A device configured to "output" data (such as a transmission, signal, or message) may, for example, send the data using a transceiver, or may send the data to a device for sending data. A device configured to "obtain" data (such as a transmission, signal, or message) may, for example, receive it using a transceiver, or may obtain the data from a device that receives the data.

[0142] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0143] Aspect 1 is a method of wireless communication at a UE, wherein the method may include receiving a CSI configuration, the CSI configuration including an SD profile set associated with multiple SD base numbers for each TRP in a plurality of TRPs. The method may include selecting an SD profile from the SD profile set associated with the multiple SD base numbers included in the CSI configuration. The method may include sending CSI to a network node, the CSI including an SD profile selected from the SD profile set associated with the multiple SD base numbers.

[0144] Aspect 2 is the method of aspect 1, wherein at least one SD profile in the SD profile set may have an SD base number equal to zero.

[0145] Aspect 3 is the method of any one of Aspects 1 and 2, wherein each of the multiple SD base numbers for each item in the SD profile set may be greater than zero.

[0146] Aspect 4 is the method of any one of aspects 1 to 3, wherein receiving the CSI configuration may include receiving RRC signaling including the CSI configuration.

[0147] Aspect 5 is a method of any one of aspects 1 to 4, wherein the method may include receiving at least one CSI-RS from a network node based on a CSI configuration. The method may include measuring the at least one CSI-RS after receiving the at least one CSI-RS from the network node. The selected SD profile may be selected based on the measured at least one CSI-RS.

[0148] Aspect 6 is the method of any one of aspects 1 to 5, wherein the method may include sending UE capabilities, the UE capabilities including an indication of a maximum number of SD profiles. The number of SD profiles in the SD profile set may be based on the maximum number of SD profiles.

[0149] Aspect 7 is the method of any one of Aspects 1 to 6, wherein the CSI may include a selection of an SD base based on the selected SD profile.

[0150] Aspect 8 is the method of any one of Aspects 1 to 7, wherein the method may include calculating multiple FD basis numbers for each of a plurality of TRPs based on the selected SD profile.

[0151] Aspect 9 is the method of aspect 8, wherein the multiple FD basis numbers can be based on an equal number of FD basis numbers for each TRP in the multiple TRPs.

[0152] Aspect 10 is the method of any one of Aspects 8 or 9, wherein the plurality of FD base numbers are based on a plurality of SD base numbers associated with the selected SD profile.

[0153] Aspect 11 is the method of any of Aspects 8 or 10, wherein a first FD base number associated with a first TRP among the plurality of TRPs may be different from a second FD base number associated with a second TRP among the plurality of TRPs.

[0154] Aspect 12 is the method of aspect 11, wherein a first rank associated with the first TRP may be greater than a second rank associated with the second TRP. The first FD basis number may be lower than the second FD basis number.

[0155] Aspect 13 is the method of any one of Aspects 8 to 11, wherein a first delay window size associated with a first TRP among a plurality of TRPs may be different from a second delay window size associated with a second TRP among the plurality of TRPs.

[0156] Aspect 14 is a method of wireless communication at a network node, wherein the method may include sending a CSI configuration, the CSI configuration including an SD profile set associated with multiple SD base numbers for each TRP in a plurality of TRPs. The method may include receiving CSI, the CSI including an SD profile selected from the SD profile set associated with the multiple SD base numbers. The CSI may be received from a UE.

[0157] Aspect 15 is the method of Aspect 14, wherein at least one SD profile in the SD profile set may have an SD base number equal to zero.

[0158] Aspect 16 is the method of any one of Aspects 14 and 15, wherein each of the multiple SD base numbers for each of the SD profile sets may be greater than zero.

[0159] Aspect 17 is the method of any one of aspects 14 to 16, wherein sending the CSI configuration may include sending RRC signaling including the CSI configuration.

[0160] Aspect 18 is the method of any one of aspects 14 to 17, wherein the method may include sending at least one CSI-RS for the UE based on the CSI configuration.

[0161] Aspect 19 is the method of any one of aspects 14 to 18, wherein the method may include receiving UE capabilities, the UE capabilities including an indication of a maximum number of SD profiles. The number of SD profiles in the SD profile set may be based on the maximum number of SD profiles.

[0162] Aspect 20 is the method of any one of Aspects 14 to 19, wherein the method may include calculating multiple FD basis numbers for each of a plurality of TRPs based on the selected SD profile.

[0163] Aspect 21 is the method of Aspect 20, wherein the plurality of FD base numbers may be based on an equal number of FD base numbers for each TRP in the plurality of TRPs.

[0164] Aspect 22 is the method of any one of Aspects 20 or 21, wherein the plurality of FD base numbers may be based on a plurality of SD base numbers associated with the selected SD profile.

[0165] Aspect 23 is the method of any of Aspects 20 or 21, wherein a first FD basis number associated with a first TRP in the plurality of TRPs is different from a second FD basis number associated with a second TRP in the plurality of TRPs.

[0166] Aspect 24 is the method of aspect 23, wherein a first rank associated with the first TRP may be greater than a second rank associated with the second TRP. The first FD basis number may be lower than the second FD basis number.

[0167] Aspect 25 is the method of any one of Aspects 20 to 24, wherein a first delay window size associated with a first TRP among a plurality of TRPs may be different from a second delay window size associated with a second TRP among the plurality of TRPs.

[0168] Aspect 26 is the method of any one of Aspects 14 to 25, wherein the CSI may include an SD basis selected based on the selected SD profile.

[0169] Aspect 27 is a method of any of aspects 14 to 26, wherein the method may include decoding a first portion of the CSI to determine the selected SD profile. The payload size of the second portion of the CSI may be based on the selected SD profile. The method may include decoding the second portion of the CSI based on the payload size to determine the selected SD profile.

[0170] Aspect 28 is the method of any one of aspects 14 to 27, wherein the method may include sending at least one DL transmission for the UE based on the selected SD profile.

[0171] Aspect 29 is the method of any one of aspects 14 to 27, wherein the method may include sending at least one CSI-RS for the UE based on the CSI configuration. The selected SD profile may be selected based on the CSI-RS.

[0172] Aspect 30 is an apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory, and based at least in part on information stored in the memory, the at least one processor is configured to implement any one of aspects 1 to 29.

[0173] Aspect 31 may be the apparatus of aspect 30, further comprising at least one of an antenna or a transceiver coupled to the at least one processor.

[0174] Aspect 32 is an apparatus for wireless communication, comprising means for implementing any of Aspects 1 to 29.

[0175] Aspect 33 is a computer-readable medium (eg, a non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 29.

Claims

1. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor is configured to: receiving a channel state information (CSI) configuration comprising a set of spatial domain (SD) profiles associated with a plurality of SD basis numbers for each of a plurality of transmit receive points (TRPs); selecting an SD profile from the set of SD profiles associated with the plurality of SD base numbers included in the CSI configuration; and CSI is sent to a network node, the CSI comprising an SD profile selected from the set of SD profiles associated with the plurality of SD base numbers.

2. The device according to claim 1, wherein: At least one SD profile in the set of SD profiles has an SD base number equal to zero.

3. The device according to claim 1, wherein: Each of the multiple SD base numbers for each item in the SD profile set is greater than zero.

4. The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor, wherein: To receive the CSI configuration, the at least one processor is configured to: Radio resource control (RRC) signaling including the CSI configuration is received via the transceiver.

5. The device according to claim 1, wherein: The at least one processor is further configured to: receiving at least one CSI reference signal (CSI-RS) from the network node based on the CSI configuration; and The at least one CSI-RS is measured after receiving the at least one CSI-RS from the network node, wherein the selected SD profile is selected based on the measured at least one CSI-RS.

6. The device according to claim 1, wherein: The at least one processor is further configured to: UE capabilities are sent, the UE capabilities comprising an indication of a maximum number of SD profiles, wherein the number of SD profiles in the SD profile set is based on the maximum number of SD profiles.

7. The device according to claim 1, wherein: The CSI includes a selection of an SD base based on the selected SD profile.

8. The device according to claim 1, wherein: The at least one processor is further configured to: A plurality of frequency domain (FD) basis numbers are calculated for each of the plurality of TRPs based on the selected SD profile.

9. The device according to claim 8, wherein: The multiple FD base numbers are based on an equal number of FD base numbers for each TRP in the multiple TRPs.

10. The device according to claim 8, wherein: The plurality of FD base numbers are based on the plurality of SD base numbers associated with the selected SD profile.

11. The device according to claim 8, wherein: A first FD base number associated with a first TRP among the plurality of TRPs is different from a second FD base number associated with a second TRP among the plurality of TRPs.

12. The device according to claim 11, wherein A first rank associated with the first TRP is greater than a second rank associated with the second TRP, wherein the first FD basis number is lower than the second FD basis number.

13. The device according to claim 8, wherein: A first delay window size associated with a first TRP among the plurality of TRPs is different from a second delay window size associated with a second TRP among the plurality of TRPs.

14. An apparatus for wireless communication at a network node, comprising: Memory; as well as at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor is configured to: transmitting a channel state information (CSI) configuration comprising a set of spatial domain (SD) profiles associated with a plurality of SD basis numbers for each of a plurality of transmit receive points (TRPs); as well as CSI is received, the CSI comprising an SD profile selected from the set of SD profiles associated with the plurality of SD base numbers, wherein the CSI is received from a user equipment (UE).

15. The device according to claim 14, wherein: At least one SD profile in the set of SD profiles has an SD base number equal to zero.

16. The device according to claim 14, wherein: Each of the multiple SD base values ​​for each item in the SD profile set is greater than zero.

17. The apparatus according to claim 14, further comprising: a transceiver coupled to the at least one processor, wherein, to transmit the CSI configuration, the at least one processor is configured to: Radio resource control (RRC) signaling including the CSI configuration is sent via the transceiver.

18. The device according to claim 14, wherein: The at least one processor is further configured to: UE capabilities are received, the UE capabilities comprising an indication of a maximum number of SD profiles, wherein the number of SD profiles in the set of SD profiles is based on the maximum number of SD profiles.

19. The device according to claim 14, wherein: The at least one processor is further configured to: A plurality of frequency domain (FD) basis numbers are calculated for each of the plurality of TRPs based on the selected SD profile.

20. The device according to claim 19, wherein The multiple FD base numbers are based on an equal number of FD base numbers for each TRP in the multiple TRPs.

21. The device according to claim 19, wherein The multiple FD base numbers are based on the multiple SD base numbers associated with the selected SD profile.

22. The device according to claim 19, wherein A first FD base number associated with a first TRP among the plurality of TRPs is different from a second FD base number associated with a second TRP among the plurality of TRPs.

23. The device according to claim 22, wherein: A first rank associated with the first TRP is greater than a second rank associated with the second TRP, wherein the first FD basis number is lower than the second FD basis number.

24. The device according to claim 19, wherein A first delay window size associated with a first TRP among the plurality of TRPs is different from a second delay window size associated with a second TRP among the plurality of TRPs.

25. The device according to claim 14, wherein: The CSI includes an SD basis selected based on the selected SD profile.

26. The device according to claim 25, wherein The at least one processor is further configured to: decoding a first portion of the CSI to determine a selected SD profile, wherein a payload size of a second portion of the CSI is based on the selected SD profile; and Based on the payload size, the second portion of the CSI is decoded to determine a selected SD basis.

27. The device according to claim 14, wherein: The at least one processor is further configured to: At least one downlink (DL) transmission is sent for the UE based on the selected SD profile.

28. The device according to claim 14, wherein: The at least one processor is further configured to: At least one CSI reference signal (CSI-RS) is sent for the UE based on the CSI configuration, wherein the selected SD profile is selected based on the CSI-RS.

29. A method for wireless communication at a user equipment (UE), comprising: receiving a channel state information (CSI) configuration comprising a set of spatial domain (SD) profiles associated with a plurality of SD basis numbers for each of a plurality of transmit receive points (TRPs); selecting an SD profile from the set of SD profiles associated with the plurality of SD base numbers included in the CSI configuration; and CSI is sent to a network node, the CSI comprising an SD profile selected from the set of SD profiles associated with the plurality of SD base numbers.

30. A method for wireless communication at a network node, comprising: transmitting a channel state information (CSI) configuration comprising a set of spatial domain (SD) profiles associated with a plurality of SD basis numbers for each of a plurality of transmit receive points (TRPs); as well as CSI is received, the CSI comprising an SD profile selected from the set of SD profiles associated with the plurality of SD base numbers, wherein the CSI is received from a user equipment (UE).

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