Enhanced type II channel state information (CSI) with larger number of antenna ports

Abstract

Certain aspects of the present disclosure provide a method for wireless communication at a user equipment (UE). The UE may select a first number of spatial domain (SD) grids from a plurality of SD grids, wherein each SD grid of the plurality of SD grids includes a plurality of SD bases. The UE may then send an indication of the selected first number of SD grids to a network entity in a channel state information (CSI) report.

Description

Background Technology

[0001] Various aspects of this disclosure relate to wireless communication, and more specifically, to techniques for grid-based spatial domain (SD) base selection. Description of Related Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, broadcasting, or other similar services. These wireless communication systems may employ multiple access technologies that enable communication with several users by sharing available wireless communication system resources.

[0003] Despite significant technological advancements in wireless communication systems over the years, challenges remain. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and receivers. Therefore, there is a continuous expectation for improving the technical performance of wireless communication systems, including, for example: improving communication speed and data carrying capacity; improving the efficiency of shared communication media; reducing the power used by transmitters and receivers during communication; improving the reliability of wireless communication; avoiding redundant transmission and / or reception and related processing; improving the coverage area of ​​wireless communication; increasing the number and types of devices that can access the wireless communication system; increasing the ability of different types of devices to communicate with each other; and increasing the number and types of available wireless communication media. Therefore, there is a need for further improvements to wireless communication systems to overcome the aforementioned technical challenges and other obstacles. Summary of the Invention

[0004] One aspect provides a method for wireless communication at a user equipment (UE). The method includes: selecting a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids includes a plurality of SD bases; and sending an indication of the selected first number of SD grids to a network entity in a channel state information (CSI) report.

[0005] On the other hand, a method for wireless communication at a network entity is provided. The method includes: transmitting at least one CSI-reference signal (RS) to a UE; and receiving a CSI report from the UE in response to the at least one CSI-RS, the CSI report indicating the selection of a first number of SD grids from a plurality of SD grids, wherein each of the plurality of SD grids includes a plurality of SD bases.

[0006] Other aspects provide: an apparatus capable of operating to, being configured to, or otherwise adapted to perform the foregoing methods and those methods described elsewhere herein; a non-transitory computer-readable medium comprising instructions that, when executed by a processor of the apparatus, cause the apparatus to perform the foregoing methods and those methods described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising: code for performing the foregoing methods and those methods described elsewhere herein; and an apparatus comprising components for performing the foregoing methods and those methods described elsewhere herein. By way of example, an apparatus may include a processing system, a device having a processing system, or a processing system cooperating via one or more networks.

[0007] For illustrative purposes, the following description and figures illustrate certain features. Attached Figure Description

[0008] The accompanying drawings depict certain features of the various aspects described herein and should not be considered as limiting the scope of this disclosure.

[0009] FIG. 1 An example wireless communication network is depicted.

[0010] FIG. 2 An example decomposed base station (BS) architecture is described.

[0011] FIG. 3 Various aspects of the sample BS and sample user equipment (UE) are described.

[0012] FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D Various example aspects of data structures used in wireless communication networks are described.

[0013] FIG. 5 Example frequency range and mid-frequency band are depicted.

[0014] FIG. 6A An example predecoder matrix is ​​depicted.

[0015] FIG. 6B An example of enhanced Type II (eType-II) Channel State Information (CSI) is depicted.

[0016] FIG. 7 An example eType-II CSI is depicted.

[0017] FIG. 8 The coefficients of the example combination are described.

[0018] FIG. 9 A call flowchart illustrating example communication between a UE and a network entity is depicted.

[0019] FIG. 10 Example scattering is depicted.

[0020] FIG. 11 An example spatial domain (SD) grid is depicted.

[0021] FIG. 12 A sample SD-based index is depicted.

[0022] FIG. 13 Different SD grids were depicted.

[0023] FIG. 14 An example of hybrid beamforming using digital and analog beams is depicted.

[0024] FIG. 15 Example amplitudes and delays of the beams used for the first subcarrier spacing (SCS) and the first bandwidth portion (BWP) are depicted.

[0025] FIG. 16 Example amplitudes and delays for the beams used in the first SCS and the second BWP are depicted.

[0026] FIG. 17 Example amplitudes and delays for the beams used in the first SCS and the third BWP are depicted.

[0027] FIG. 18 A method for wireless communication at the UE is described.

[0028] FIG. 19 A method for wireless communication at network entities is described.

[0029] FIG. 20 and FIG. 21 An example communication device is described. Detailed Implementation

[0030] Channel State Information (CSI) refers to the channel properties of a communication link. CSI represents, for example, the combined effects of scattering, fading, and power attenuation with the distance between the transmitter and receiver. Channel estimation can be performed using pilot signals (such as CSI Reference Signals (CSI-RS)) to determine these effects on the channel. CSI can be used to adapt transmission based on the current channel conditions, which is useful for achieving reliable communication, especially in multi-antenna systems with high data rates. CSI is measured, quantized, and fed back to the transmitter at the receiver.

[0031] CSI can include various parameters or metrics, such as the Channel Quality Indicator (CQI), Pre-decoding Matrix Indicator (PMI), CSI Reference Signal (RS) Resource Indicator (CRI), and Rank Indicator (RI). CSI may also include information associated with spatial domain (SD) beam selection (i.e., a subset of the total number of SD bases). The total number of SD bases can be based on the number of antennas in the horizontal and vertical directions of the panel. The values ​​of the subsets of SD bases can be determined based on combination coefficients in a standard definition table.

[0032] The combination coefficients in the standard definition table are applicable to devices with a finite number of antennas (i.e., the maximum number of antennas in the horizontal and vertical directions of the panel can be 16). However, for devices with a large number of antennas, the combination coefficients in the standard definition table may not be applicable.

[0033] Updating the current standard definition table to support larger values ​​for the number of antennas in the horizontal and vertical directions would make the standard definition table too large. Since the current standard definition table is firmware-based and embedded in the device's chipset hardware, any increase in the size of the standard definition table will require more memory, resulting in a larger chipset in the device.

[0034] This disclosure provides apparatus, methods, processing systems, and computer-readable media for grid-based SD base selection in a panel, rather than the conventional selection of a subset of SD bases. For example, SD bases with consecutive indices in a panel may be aggregated into SD grids. That is, each SD grid may include multiple SD bases with consecutive indices. A user equipment (UE) may select a subset of SD grids (rather than a subset of SD bases) from the set of SD grids. Because the number of SD grids is less than the number of SD bases, the UE can still be able to determine the value of the subset of SD grids using combination coefficients in currently defined standard tables. In some cases, within each SD grid of a subset of SD grids, the UE may also select one or more SD bases. The UE may generate and send a CSI report indicating the subset of SD grids and / or one or more SD bases within each SD grid of a subset of SD grids.

[0035] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques can be used to provide enhanced CSI reporting from devices with a large number of antennas without changing any hardware of these devices to provide information (e.g., SD beam selection information) in the CSI reporting. Introduction to Wireless Communication Networks

[0036] The techniques and methods described herein can be used in a variety of wireless communication networks. While aspects may be described herein using terms commonly associated with 3G, 4G, and / or 5G wireless technologies, aspects of this disclosure are equally applicable to other communication systems and standards not explicitly mentioned herein.

[0037] FIG. 1 An example of a wireless communication network 100 in which the aspects described herein can be implemented is depicted.

[0038] Generally, wireless communication network 100 includes various network entities (optionally, network elements or network nodes). Network entities are typically communication devices and / or communication functions performed by communication devices (e.g., user equipment (UE), base station (BS), components of the BS, servers, etc.). For example, various functions of the network and various devices associated with and interacting with the network can be considered network entities. Furthermore, wireless communication network 100 includes terrestrial and non-terrestrial aspects. The terrestrial aspect includes ground-based network entities (e.g., BS 102), and the non-terrestrial aspect includes satellite 140 and aircraft 145, which may include onboard network entities (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and UEs.

[0039] In the depicted example, wireless communication network 100 includes BS 102, UE 104 and one or more core networks (such as Evolved Packet Core (EPC) 160 and 5G Core (5GC) network 190) that interoperate to provide communication services over various communication links, including wired and wireless links.

[0040] FIG. 1 Various example UEs 104 are described, which may more generally include: cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players, cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, Internet of Things (IoT) devices, always-on (AON) devices, edge processing devices, or other similar devices. UE 104 may also be more generally referred to as mobile devices, wireless devices, wireless communication devices, stations, mobile stations, subscriber stations, mobile subscriber stations, mobile units, subscriber units, wireless units, remote units, remote devices, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, and others.

[0041] BS 102 communicates wirelessly with UE 104 via communication link 120 (e.g., transmitting or receiving signals to or from UE 104). Communication link 120 between BS 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to BS 102 and / or downlink (DL) (also known as forward link) transmission from BS 102 to UE 104. In various aspects, communication link 120 may utilize multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity.

[0042] BS 102 may typically include: NodeB, enhanced NodeB (eNB), next-generation enhanced NodeB (ng-eNB), next-generation NodeB (gNB or gNodeB), access point, transceiver base station, radio BS, radio transceiver, transceiver functionality, transmit / receive point, and / or others. Each BS in BS 102 may provide communication coverage for a corresponding geographic coverage area 110, which may sometimes be referred to as a cell, and in some cases may overlap (e.g., a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of a macro cell). For example, a BS may provide communication coverage for macro cells (covering a relatively large geographic area), pico cells (covering a relatively small geographic area, such as a stadium), femtocells (covering a relatively small geographic area (e.g., a home)), and / or other types of cells.

[0043] Although BS 102 is described as a single communication device in various aspects, it can be implemented in various configurations. For example, one or more components of BS 102 can be decomposed, including a central unit (CU), one or more distributed units (DU), one or more radio units (RU), a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, to name a few. Also, various aspects of BS 102 can be virtualized. More generally, a BS (e.g., BS 102) can include components located in a single physical location or components located in various physical locations. In examples where BS 102 includes components located in various physical locations, each component can perform its own function, such that the various components collectively achieve functionality similar to BS 102 located in a single physical location. In some aspects, a BS 102 including components located in various physical locations can be referred to as a decomposed radio access network (RAN) architecture, such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture. FIG. 2 An example decomposed BS architecture is depicted and described.

[0044] Different BSs 102 within the wireless communication network 100 can also be configured to support different radio access technologies (such as 3G, 4G, and / or 5G). For example, a BS 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). A BS 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) can interface with 5GC 190 via a second backhaul link 184. BSs 102 can communicate directly or indirectly (e.g., via EPC 160 or 5GC 190) on a third backhaul link 134 (e.g., X2 interface), which can be wired or wireless.

[0045] Wireless communication network 100 can subdivide the electromagnetic spectrum into various categories, bands, channels, or other characteristics. In some aspects, subdivision is provided based on wavelength and frequency, where frequency may also be referred to as carrier, subcarrier, channel, tone, or subband. For example, 3GPP currently defines frequency range 1 (FR1) as including 600MHz-6GHz, which is often (interchangeably) referred to as “below 6GHz”. Similarly, 3GPP currently defines frequency range 2 (FR2) as including 26GHz-41GHz, which is sometimes (interchangeably) referred to as “millimeter wave” (“mmW” or “mmWave”). A BS configured to communicate using mmWave / near mmWave radio bands (e.g., mmWave BS, such as BS 180) can utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.

[0046] The communication link 120 between BS 102 and, for example, UE 104 can be via one or more carriers, which may have different bandwidths (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz and / or other MHz) and may be aggregated in various ways. The carriers may be adjacent to each other 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 to DL compared to UL).

[0047] Compared to lower-frequency communication, communication using higher frequency bands may have higher path loss and shorter range. Therefore, some BSs (e.g., FIG. 1The beamforming 182 of the BS 180 and UE 104 can be used to improve path loss and range. For example, the BS 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming. In some cases, the BS 180 may transmit beamformed signals to the UE 104 in one or more transmit directions 182'. The UE 104 may receive beamformed signals from the BS 180 in one or more receive directions 182''. The UE 104 may also transmit beamformed signals to the BS 180 in one or more transmit directions 182''. The BS 180 may also receive beamformed signals from the UE 104 in one or more receive directions 182''. The BS 180 and UE 104 may then perform beamforming training to determine the optimal receive and transmit directions for each of the BS 180 and UE 104. It is worth noting that the transmit and receive directions of the BS 180 may be the same or different. Similarly, the sending and receiving directions of UE 104 can be the same or different.

[0048] The wireless communication network 100 further includes a Wi-Fi AP 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in, for example, unlicensed spectrum in 2.4 GHz and / or 5 GHz.

[0049] Some UEs 104 may use device-to-device (D2D) communication links 158 to communicate with each other. The D2D communication link 158 may use one or more sidelink channels, such as physical sidelink broadcast channel (PSBCH), physical sidelink discovery channel (PSDCH), physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), and / or physical sidelink feedback channel (PSFCH).

[0050] EPC 160 may include various functional components, including: Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and / or Packet Data Network (PDN) Gateway 172, as in the illustrated example. MME 162 may communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connectivity management.

[0051] Generally, user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP services 176, which may include, for example, the Internet, intranets, IP Multimedia Subsystem (IMS), packet-switched (PS) streaming services, and / or other IP services.

[0052] The BM-SC 170 provides functionality for MBMS user service dispatch and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and / or can be used to schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS services to BS 102 belonging to a Broadcast-Specific Service Single Frequency Network (MBSFN) area, and / or can be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0053] 5GC 190 may include various functional components, including: Access and Mobility Management Function (AMF) 192, other AMFs 193, Session Management Function (SMF) 194, and User Plane Function (UPF) 195. AMF 192 can communicate with Unified Data Management (UDM) 196.

[0054] AMF 192 is the control node that handles signaling between UE 104 and 5GC 190. AMF 192 provides services such as Quality of Service (QoS) flow and session management.

[0055] Internet Protocol (IP) packets are transmitted via UPF 195, which connects to IP service 197 and provides the UE with IP address allocation and other functions for 5GC 190. IP service 197 may include, for example, the Internet, intranet, IMS, PS streaming service, and / or other IP services.

[0056] The wireless communication network 100 also includes a spatial domain (SD) component 198, which can be configured to perform... FIG. 18 Method 1800. The wireless communication network 100 also includes an SD component 199, which can be configured to perform FIG. 19 Method 1900.

[0057] In various aspects, to give a few examples, network entities or network nodes can be implemented as aggregated BS, decomposed BS, components of BS, integrated access and backhaul (IAB) nodes, trunk nodes, and sidelink nodes.

[0058] FIG. 2 An example decomposed BS 200 architecture is depicted. The decomposed BS 200 architecture may include one or more central units (CUs) 210, which may communicate directly with the core network 220 via a backhaul link, or indirectly with the core network 220 through one or more decomposed BS units, such as a near real-time (near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) framework 205, or both. CUs 210 may communicate with one or more distributed units (DUs) 230 via appropriate midhaul links (such as F1 interfaces). DUs 230 may communicate with one or more radio units (RUs) 240 via appropriate fronthaul links. RUs 240 may communicate with a corresponding UE 104 via one or more radio frequency (RF) access links. In some specific implementations, UE 104 may be served simultaneously by multiple RUs 240.

[0059] Each unit in a cell (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RT RIC 215, and SMO frame 205) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the cells, or an associated processor or controller that provides instructions to the cell's communication interface, may be configured to communicate with one or more other cells via the transmission medium. For example, these cells may include a wired interface configured to receive signals or transmit signals to one or more other cells via a wired transmission medium. Additionally or alternatively, a cell may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) configured to receive signals on a wireless transmission medium or transmit signals to one or more other cells, or both.

[0060] In some aspects, CU 210 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Serving Data Adaptation Protocol (SDAP), etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by CU 210. CU 210 can be configured to handle user plane functions (e.g., Central Unit-User Plane (CU-UP)), control plane functions (e.g., Central Unit-Control Plane (CU-CP)), or combinations thereof. In some implementations, CU 210 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, CU-UP units can communicate bidirectionally with CU-CP units via an interface such as an E1 interface. CU 210 may be implemented to communicate with DU 230 for network control and signaling, as needed.

[0061] DU 230 may correspond to a logic unit that includes one or more BS functions for controlling the operation of one or more RU 240s. In some aspects, DU 230 may at least partially host one or more of the Radio Link Control (RLC) layer, 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 and demodulation, etc.) according to functional splits (such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 230 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0062] Lower-layer functionality can be implemented by one or more RU 240s. In some deployments, the RU240 controlled by the DU 230 may correspond to a logical node that at least partially hosts RF processing functions or low-PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, Physical Random Access Channel (PRACH) extraction and filtering, etc.) based on functional decomposition such as lower-layer functional decomposition, or both. In such architectures, the RU 240 may be implemented to handle over-the-air (OTA) communications with one or more UE 104s. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration enables the implementation of the DU 230 and CU 210 in cloud-based RAN architectures such as vRAN architectures.

[0063] SMO framework 205 can be configured to support RAN deployment and configuration of both non-virtualized and virtualized network elements. For non-virtualized network elements, SMO framework 205 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, SMO framework 205 can be configured to interact with a cloud computing platform such as Open Cloud (O-Cloud) 290 to perform network element lifecycle management (such as instantiation of virtualized network elements) via a cloud computing platform interface such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some implementations, SMO framework 205 can communicate with the hardware aspects of the 4G RAN (such as Open eNB (O-eNB) 211) via the O1 interface. Additionally, in some implementations, SMO framework 205 can communicate directly with one or more RU 240s via the O1 interface. SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of SMO framework 205.

[0064] The non-RT RIC 215 can be configured to include logical functions that enable non-real-time control and optimization of RAN elements and resources, including artificial intelligence / machine learning (AI / ML) workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 225. The non-RT RIC 215 can be coupled to or communicate with the near-RT RIC 225, such as via an A1 interface. The near-RT RIC 225 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via an interface, such as an E2 interface, through data collection and actions, connecting one or more CU 210s, one or more DU 230s, or both, and O-eNBs to the near-RT RIC 225.

[0065] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 225 and may be received from non-network data sources or network functions at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions via the SMO framework 205 (such as reconfiguration via O1) or by creating RAN management policies (such as A1 policies).

[0066] FIG. 3 Various aspects of examples BS 102 and UE 104 are described.

[0067] Generally, BS 102 includes various processors (e.g., 320, 330, 338, and 340), antennas 334a-334t (collectively referred to as 334), transceivers 332a-332t (collectively referred to as 332) including modulators and demodulators, and other aspects that enable the wireless transmission of data (e.g., data source 312) and the wireless reception of data (e.g., data sink 339). For example, BS 102 can transmit and receive data between BS 102 and UE 104. BS 102 includes a controller / processor 340 that can be configured to implement the various functions described herein related to wireless communication.

[0068] BS 102 includes a controller / processor 340 that can be configured to implement various functions related to wireless communication. In the depicted example, the controller / processor 340 includes an SD component 341 that can represent FIG. 1 The STC component 199. It is worth noting that, although depicted as one aspect of the controller / processor 340, in other specific implementations, the SD component 341 may additionally or alternatively be implemented in various other aspects of the BS 102.

[0069] Generally, UE 104 includes various processors (e.g., 358, 364, 366, and 380), antennas 352a-352r (collectively referred to as 352), transceivers 354a-354r (collectively referred to as 354) including modulators and demodulators, and other aspects that enable the wireless transmission of data (e.g., retrieved from data source 362) and the wireless reception of data (e.g., provided to data sink 360). UE 104 includes a controller / processor 380 that can be configured to implement the various functions described herein related to wireless communication.

[0070] UE 104 includes a controller / processor 380 that can be configured to implement various functions related to wireless communication. In the depicted example, the controller / processor 380 includes an SD component 381 that can represent FIG. 1 The STC component 198. It is worth noting that, although depicted as one aspect of the controller / processor 380, in other specific implementations, the SD component 381 may additionally or alternatively be implemented in various other aspects of the UE 104.

[0071] Regarding example downlink transmission, BS 102 includes a transmission processor 320 that can receive data from data source 312 and control information from controller / processor 340. The control information may be for a Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical HARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Shared PDCCH (GC PDCCH), and / or others. In some examples, this data may be for a Physical Downlink Shared Channel (PDSCH).

[0072] The transmitter processor 320 can process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmitter processor 320 can also generate reference symbols (such as those for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS)).

[0073] The transmit (TX) multiple-input multiple-output (MIMO) processor 330 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, and / or reference symbols where applicable, and can provide the output symbol stream to the modulators (MODs) in transceivers 332a-332t. Each modulator in transceivers 332a-332t can process its corresponding output symbol stream to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signal from the modulators in transceivers 332a-332t can be transmitted via antennas 334a-334t respectively.

[0074] To receive downlink transmissions, UE 104 includes antennas 352a-352r that receive downlink signals from BS 102 and provide the received signals to demodulators (DEMODs) in transceivers 354a-354r respectively. Each demodulator in transceivers 354a-354r can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator can further process the input sample to obtain the received symbols.

[0075] The MIMO detector 356 acquires received symbols from all demodulators in transceivers 354a-354r, performs MIMO detection on the received symbols where applicable, and provides the detected symbols. The receive processor 358 processes (e.g., demodulates, deinterleaves, and decodes) the detected symbols, provides the decoded data of UE 104 to data sink 360, and provides the decoded control information to controller / processor 380.

[0076] Regarding the example uplink transmission, UE 104 further includes a transmission processor 364 that receives and processes data from data source 362 (e.g., for PUSCH) and control information from controller / processor 380 (e.g., for Physical Uplink Control Channel (PUCCH)). Transmission processor 364 can also generate reference symbols for reference signals (e.g., for Sounding Reference Signal (SRS)). Symbols from transmission processor 364 may be pre-decoded by TX MIMO processor 366, where applicable, further processed by modulators in transceivers 354a-354r (e.g., for SC-FDM), and transmitted to BS 102.

[0077] At BS 102, uplink signals from UE 104 can be received by antennas 334a-t, processed by demodulators in transceivers 332a-332t, detected by MIMO detector 336 where applicable, and further processed by receiver processor 338 to obtain decoded data and control information transmitted by UE 104. Receiver processor 338 can provide the decoded data to data sink 339 and the decoded control information to controller / processor 340.

[0078] Memory 342 and memory 382 can store data and program code for BS 102 and UE 104, respectively.

[0079] Scheduler 344 can schedule UE to transmit data on the downlink and / or uplink.

[0080] In various respects, BS 102 can be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, "transmitting" can refer to various mechanisms that output data, such as from data source 312, scheduler 344, memory 342, transmit processor 320, controller / processor 340, TX MIMO processor 330, transceiver 332a-332t, antenna 334a-334t, and / or other aspects described herein. Similarly, "receiving" can refer to various mechanisms that acquire data, such as from antenna 334a-334t, transceiver 332a-332t, RX MIMO detector 336, controller / processor 340, receive processor 338, scheduler 344, memory 342, and / or other aspects described herein.

[0081] In various respects, UE 104 can also be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” can refer to various mechanisms that output data, such as from data source 362, memory 382, ​​transmit processor 364, controller / processor 380, TX MIMO processor 366, transceiver 354a-354t, antenna 352a-352t, and / or other aspects described herein. Similarly, “receiving” can refer to various mechanisms that acquire data, such as from antenna 352a-352t, transceiver 354a-354t, RX MIMO detector 356, controller / processor 380, receive processor 358, memory 382, ​​and / or other aspects described herein.

[0082] In some respects, the processor can be configured to perform various operations (such as those associated with the methods described herein) and to send (output) data to or receive data from another interface configured to send or receive data, respectively.

[0083] FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D Describes the use of wireless communication networks (such as FIG. 1 All aspects of the data structure of the wireless communication network 100.

[0084] Specifically, FIG. 4A Figure 400 is an example of the first subframe within a 5G (e.g., 5G NR) frame structure. FIG. 4B Figure 430 illustrates an example of a DL channel within a 5G subframe. FIG. 4C Figure 450 illustrates an example of the second subframe within a 5G frame structure, and FIG. 4DFigure 480 illustrates an example of a UL channel within a 5G subframe.

[0085] Wireless communication systems can utilize Orthogonal Frequency Division Multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. Such systems can also support half-duplex operation using Time Division Duplex (TDD). OFDM and Single-Carrier Frequency Division Multiplexing (SC-FDM) will (e.g., as...) FIG. 4B and FIG. 4D The system bandwidth is divided into multiple orthogonal subcarriers. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM and / or in the time domain using SC-FDM.

[0086] Wireless communication frame structures can be frequency division duplex (FDD), where for a specific set of subcarriers, subframes within that set are dedicated to either deep (DL) or ultra-low (UL). Wireless communication frame structures can also be time division duplex (TDD), where for a specific set of subcarriers, subframes within that set are dedicated to both DL and UL.

[0087] exist FIG. 4A and FIG. 4C In this example, the wireless communication frame structure is TDD, where D stands for DL, U for UL, and X can be flexibly used between DL and UL. The UE can configure the time slot format via the received Slot Format Indicator (SFI) (dynamically configured via DL Control Information (DCI) or semi-statically / statically configured via Radio Resource Control (RRC) signaling). In the depicted example, a 10ms frame is divided into 10 equal-sized 1ms subframes. Each subframe may include one or more time slots. In some examples, each time slot may include 7 or 14 symbols, depending on the time slot format. Subframes may also include micro-slots, which typically have fewer symbols than the entire time slot. Other wireless communication technologies may have different frame structures and / or different channels.

[0088] In some respects, the number of time slots within a subframe is based on the time slot configuration and parameter set. For example, for time slot configuration 0, different parameter sets (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 time slots per subframe, respectively. For time slot configuration 1, different parameter sets 0 to 2 allow for 2, 4, and 8 time slots per subframe, respectively. Therefore, for time slot configuration 0 and parameter set μ, there are 14 symbols per time slot and 2µ time slots per subframe. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to... kHz, where μ is the parameter set from 0 to 5. Therefore, the parameter set... It has a subcarrier spacing of 15 kHz and a parameter set It has a subcarrier spacing of 480 kHz. The symbol length / duration is negatively correlated with the subcarrier spacing. FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D It provides slot configuration 0 with 14 symbols per slot and parameter set with 4 slots per subframe. Example: The time slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0089] like FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D The resource grid depicted can be used to represent the frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)) extending for, for example, 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0090] like FIG. 4A As illustrated, some REs in the RE carry information for the UE (e.g., FIG. 1 and FIG. 3 The reference (pilot) signal (RS) for the UE (104) may include a demodulation RS (DMRS) and / or a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0091] FIG. 4B Examples of various DL channels within a subframe of a frame are illustrated. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising, for example, nine RE groups (REGs), each REG comprising, for example, four consecutive REs in an OFDM symbol.

[0092] The Primary Synchronization Signal (PSS) can be located within symbol 2 of a specific subframe of the frame. The PSS is generated by the UE (e.g., FIG. 1 and FIG. 3 104) is used to determine subframe / symbol timing and physical layer identifier.

[0093] The secondary synchronization signal (SSS) can be located within symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identification group number and radio frame timing.

[0094] Based on the Physical Layer Identifier and Physical Layer Cell Identifier Group Number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DMRS. 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. The MIB provides the number of RBs and the System Frame Number (SFN) in the system bandwidth. The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information (such as System Information Block (SIB)) not transmitted via the PBCH, and / or paging messages.

[0095] like FIG. 4C As illustrated, some REs in the REs carry DMRS for channel estimation at the BS (indicated as R for a particular configuration, but other DMRS configurations are possible). The UE can transmit DMRS for PUCCH and DMRS for PUSCH. PUSCH DMRS can be transmitted, for example, in the first or second symbol preceding the PUSCH. PUCCH DMRS can be transmitted in different configurations depending on whether a short or long PUCCH is being transmitted and depending on the specific PUCCH format used. UE104 can transmit a Sounding Reference Signal (SRS). SRS can be transmitted, for example, in the last symbol of a subframe. SRS can have a comb structure, and the UE can transmit SRS on one of the comb teeth. SRS can be used by the BS for channel quality estimation to enable frequency-dependent scheduling at the UL.

[0096] FIG. 4D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH can be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), pre-decoding matrix indicators (PMI), rank indicators (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSR), power clearance reports (PHR), and / or UCI. Introduction to mmWave Wireless Communications

[0097] In wireless communication, the electromagnetic spectrum is typically subdivided into various categories, bands, channels, or other characteristics. Subdivisions are usually provided based on wavelength and frequency, where frequency can also be referred to as carrier, subcarrier, channel, tone, or subband.

[0098] Fifth-generation (5G) networks can utilize several frequency ranges, which in some cases are defined by standards such as the 3rd Generation Partnership Project (3GPP) standards. For example, although the 3GPP technical standard TS 38.101 currently defines Frequency Range 1 (FR1) as including 600MHz-6GHz, specific uplink and downlink allocations may fall outside this general range. Therefore, FR1 is often referred to (interchangeably) as the "sub-6GHz" band.

[0099] Similarly, although TS 38.101 currently defines Frequency Range 2 (FR2) as including 26 GHz–41 GHz, specific uplink and downlink allocations may fall outside this general range. FR2 is sometimes referred to (interchangeably) as the “millimeter wave” (“mmW” or “mmWave”) band, although it differs from the Extremely High Frequency (EHF) band (30 GHz–300 GHz) designated as “millimeter wave” by the International Telecommunication Union (ITU) because wavelengths at these frequencies are between 1 mm and 10 mm.

[0100] Compared to lower frequency communications, communications using mmWave / near-mmWave radio bands (e.g., 3 GHz–300 GHz) may have higher path loss and shorter range. As mentioned above... FIG. 1 As described, a base station (BS) (e.g., 180) configured to communicate using mmWave / near mmWave radio bands can utilize beamforming (e.g., 182) with user equipment (UE) (e.g., 104) to improve path loss and range. Overview of Massive Multiple-Input Multiple-Output (MIMO)

[0101] Multiple-input multiple-output (MIMO) is an antenna technique that concentrates the energy of a signal at the receiver. This technique involves mathematical algorithms that combine the radiation intensities from multiple antennas. Using MIMO, these multiple antennas carry multiple data streams on the same frequency, and the transmission bandwidth is subdivided into several different channels or spaces to carry the data.

[0102] Massive MIMO extends the capabilities of MIMO and is related to the number of antennas involved in signal transmission and reception. For example, massive MIMO essentially groups a larger number of antennas together at the transmitter and receiver to provide better throughput and better spectral efficiency. To achieve the capacity gain of massive MIMO, multiple user equipment (UEs) can generate downlink traffic simultaneously. Many variables can affect the actual gain provided by massive MIMO. Overview of Channel State Information (CSI)

[0103] Channel State Information (CSI) refers to the channel properties of a communication link. CSI represents, for example, the combined effects of scattering, fading, and power attenuation with the distance between the transmitter and receiver. Channel estimation can be performed using pilot signals (such as CSI Reference Signals (CSI-RS)) to determine these effects on the channel. CSI can be used to adapt transmission based on the current channel conditions, which is useful for achieving reliable communication, especially in multi-antenna systems with high data rates. CSI is measured, quantized, and fed back to the transmitter at the receiver.

[0104] The time and frequency resources that can be used by the user equipment (UE) to report CSI are controlled by the base station (BS) (e.g., gNB). CSI may include a channel quality indicator (CQI), a pre-decoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), an SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), and / or an L1 reference signal received power (RSRP). However, as described below, additional information or other information may be included in the CSI.

[0105] The UE can be configured by the BS for CSI reporting. For example, the BS may configure the UE with a CSI reporting configuration or multiple CSI reporting configurations. The CSI reporting configuration can be provided to the UE via higher-layer signaling, such as Radio Resource Control (RRC) signaling (e.g., CSI-ReportConfig). The CSI reporting configuration may be associated with CSI-RS resources used for channel measurements (CM), interference measurements (IM), or both. The CSI reporting configuration is used to configure CSI-RS resources (e.g., CSI-ResourceConfig) for CSI measurements. The CSI-RS resources provide the UE with a configuration of CSI-RS ports or groups of CSI-RS ports mapped to time and frequency resources (e.g., resource elements (REs)). The CSI-RS resources can be zero-power (ZP) or non-zero-power (NZP) resources. At least one NZP CSI-RS resource can be configured for CM.

[0106] CSI reporting configuration allows the UE to be configured for aperiodic, periodic, or semi-persistent CSI reporting. For periodic CSI, the UE can be configured with periodic CSI-RS resources. Periodic CSI on the Physical Uplink Control Channel (PUCCH) can be triggered via RRC. Semi-persistent CSI reporting on the PUCCH can be activated via Media Access Control (MAC) control elements (CE). For aperiodic and semi-persistent CSI on the Physical Uplink Shared Channel (PUSCH), the BS can signal a CSI report trigger to the UE, instructing the UE to transmit CSI reports for one or more CSI-RS resources, or configure CSI-RS report trigger states (e.g., CSI-AperiodicTriggerStateList and CSI-SemiPersistentOnPUSCH-TriggerStateList). CSI report triggering for aperiodic and semi-persistent CSI on the PUSCH can be provided via Downlink Control Information (DCI).

[0107] The UE can report CSI Feedback (CSF) based on CSI reporting configuration and CSI reporting triggering. For example, the UE can measure the channels on which triggered (e.g., associated with CSI reporting configuration) CSI-RS resources are transmitted. Based on these measurements, the UE can select preferred CSI-RS resources. The UE reports the CSF for the selected CSI-RS resources.

[0108] Each CSI reporting configuration can be associated with a single downlink (DL) bandwidth portion (BWP). The CSI reporting setting configuration can define the CSI reporting band as a subset of subbands of the BWP. The associated DLBWP can be indicated by a higher-layer parameter (e.g., bwp-Id) in the CSI reporting configuration for CM and contains parameters for a CSI reporting band, such as codebook configuration, time-domain behavior, frequency granularity for CSI, measurement constraint configuration, and CSI-related quantities to be reported by the UE. Each CSI resource setting can reside within a DL BWP identified by a higher-layer parameter, and all CSI resource settings can be linked to CSI reporting settings with the same DL BWP.

[0109] In some systems, the UE can configure one of two possible subband sizes via higher-layer signaling (e.g., in the CSI report configuration) (e.g., the reportFreqConfiguration included in CSI-ReportConfig), which indicates the frequency granularity of the CSI report, where the subband can be defined as... The adjacent Physical Resource Blocks (PRBs) depend on the total number of PRBs in the BWP. The UE can also receive indications of subbands for which CSI feedback is requested. In some examples, a subband mask is configured for the requested subbands used for CSI reporting. The UE computes a pre-decoder for each requested subband and finds a pre-decoder matrix indicator (PMI) that matches the computed pre-decoder in each of these subbands.

[0110] In 5G New Radio (NR) Massive Multiple-Input Multiple-Output (MIMO), CSI (i.e., Digital Beamforming) supports up to 32 antenna ports. Within the (low-frequency band) frequency range 1 (FR1), only a small number of antenna ports can be used (e.g., due to limitations in antenna array size, such as shape factor). In frequency range 2 (FR2), a small number of antenna ports (e.g., 2 or 4 ports) can also be used to limit antenna hardware costs. In some cases, a small number of antenna ports is used because they function correctly with narrow analog beams implemented using large phased antenna arrays (e.g., with 1024 antenna elements).

[0111] In such FIG. 5 In some intermediate frequency (IF) bands depicted in Figure 500 (e.g., higher FR1 (e.g., 3 GHz to 6 GHz) or frequency range 3 (FR2) (7 GHz to 24 GHz)), a large number of antenna ports can be used. In some cases, the IF band can support an even greater number of antenna ports (e.g., more than 32 antenna ports). For example, a 128-TXRU with 64 or 128 ports of CSI-RS can be supported. In some cases, the IF band can be deployed using more than one analog beam for hybrid beamforming (e.g., four or more beams). Overview of Channel State Information (CSI) Feedback Coefficient Reporting

[0112] User equipment (UE) can be configured to perform channel state information (CSI) reporting, for example, by receiving CSI configuration messages from a base station (BS). In some cases, the UE can be configured to report at least the Type II pre-decoder across configured frequency domain (FD) units. For example, for layer... pre-decoder matrix This includes using spatial compression to report the W1 matrix of a subset of selected beams and using FD cells across configurations to report (for cross-polarization) the linear combination coefficients for selected beams (2L). matrix: ,in , Where b i It is the selected beam, c i It is the set of linear combination coefficients (i.e., a matrix). For an entry), L is the number of selected spatial beams, and N3 corresponds to the number of frequency units (e.g., subbands, resource blocks (RBs), etc.). In some configurations, L is configured via radio resource control (RRC). The precoder is based on a linear combination of digital Fourier transform (DFT) beams. Type II codebooks can improve multi-user (MU) multiple-input multiple-output (MIMO) performance. In some configurations considering the presence of two polarizations, The size of the matrix is 2L X N3.

[0113] In some cases, the UE may be configured to report FD compressed precoder feedback to reduce the overhead of CSI reporting. As FIG. 6A depicted, for layer (where ), the precoder matrix ( ) can use the FD compression matrix to compress the size of the precoder matrix's matrix to 2L X M (where M is network configured and conveyed via RRC or downlink control information (DCI) in the CSI configuration message, and M < N3), and is given by: where the precoder matrix (not shown) has P = 2N1N2 rows (spatial domain, number of ports) and N3 columns (frequency domain compression units including RBs or reported subbands), and where M bases are independently selected for each of layers 0 and 1. Matrix 620 includes linear combination coefficients (amplitude and in-phase), where each element represents the coefficient for a tap of a beam. Matrix 620 is defined by a size 2L X M, where one row corresponds to one spatial beam in (not shown) of size P X 2L (where L is network entity configured via RRC), and one entry therein represents the coefficient for one tap of that spatial beam. The UE may be configured to report (e.g., CSI report) a subset K0 < 2LM of the linear combination coefficients of matrix 620. For example, the UE may report K NZ,i < K0 coefficients (e.g., where K NZ,i corresponds to the maximum number of non-zero coefficients for layer (where or 1), and K0 is network configured via RRC) (e.g., unreported coefficients are set to zero). In some configurations, the entries in matrix 620 correspond to Row 630 of matrix 630. In the example shown, at layer 0... Matrix 620 and at layer 1 Both matrix 640 and 2L x M are 2L x M.

[0114] Matrix 630 consists of basis vectors (e.g., each row is a basis vector) used to perform compression in FD. In the example shown, at layer 0... Matrix 630 and at layer 1 Both matrices 660 include M=4 FD bases (e.g., illustrated as shaded rows) from N3 candidate DFT bases. In some configurations, the UE can report via CSI reporting. A subset of the selected basis of the matrix. Specifically, M basis points are selected at layer 0 and layer 1. That is, the M basis points selected at layer 0 can be the same as, partially overlap with, or not overlap with the M basis points selected at layer 1. Overview of Channel State Feedback (CSF) Based on User Equipment (UE) Precoding Matrix Indicator (PMI) Codebook

[0115] The pre-decoded matrix indicator (PMI) codebook is a dictionary of PMI entries. In this way, using the PMI codebook, each PMI component from a predefined set can be mapped to a bit sequence reported by the user equipment (UE). The base station (BS) that receives the bit sequence (e.g., as channel state feedback (CSF)) can then obtain the corresponding PMI from the reported bit sequence.

[0116] How the UE calculates the PMI is left to the UE's specific implementation. However, how the UE reports the PMI should follow the format defined in the codebook, so that both the UE and the BS know how to map the PMI components to the reported bit sequence.

[0117] FIG. 6B Example 670 depicts enhanced Type II (eType-II) Channel State Information (CSI). In this example 670, for each layer, across multiple... The pre-decoder for the (PMI-) subband is matrix: .

[0118] Among them, the spatial domain (SD) basis (For example, the Direct Fourier Transform (DFT) basis) is matrix, It is shared by all floors. (Number of Tx antennas - of which) and DFT oversampling is configured via Radio Resource Control (RRC), L={2, 4, 6} (e.g., the number of beams) is configured via RRC, and the frequency domain (FD) basis is... (For example, DFT base) is matrix, It is layer-specific, and M (e.g., the number of FD bases) is rank-pair-specific, i.e., for rank = {1, 2}. And for rank = {3, 4}, , or It is configured via RRC. Coefficient matrix. for The matrix is ​​layer-specific. For each layer, the UE can report up to [number missing]. There are non-zero coefficients, among which It's configured with RRC. Across all tiers, the UE can report up to... There are 10 non-zero coefficients, where unreported coefficients can be set to zero. Overview of Channel State Information (CSI) Content

[0119] The Channel State Information (CSI) report configuration also allows configuration of the CSI parameters to be reported (sometimes referred to as the number). Codebooks can include Type I single-panel, Type I multi-panel, and Type II single-panel. Regardless of the codebook used, the CSI report can include at least the Channel Quality Indicator (CQI), Pre-decoded Matrix Indicator (PMI), CSI Reference Signal (RS) Resource Indicator (CRI), and Rank Indicator (RI). The structure of the PMI can vary based on the codebook.

[0120] In some cases, due to the large payload size, CSI reports are divided into two parts. For example, CRI, RI, and CQI may be in the first part (part I) of the CSI report, and PMI may be in the second part (part II) of the CSI report.

[0121] For a Type I single-panel codebook, the PMI may include a W1 matrix (e.g., a subset of beams) and a W2 matrix (e.g., phases for cross-polarization combination and beam selection). For a Type I multi-panel codebook, the PMI also includes phases for cross-panel combination, compared to a Type I single-panel codebook. A base station (BS) may have multiple transmit (TX) beams. A user equipment (UE) may feed back the index of one or more preferred beams of a candidate beam to the BS. For example, the UE may feed back the index of the preferred beam for the first... l Layer pre-decoding vector w : in b This represents an oversampled beam with two polarizations (e.g., a Discrete Fourier Transform (DFT) beam), and φ It is in phase.

[0122] For a Type II codebook (e.g., which may be designed for a single panel), the PMI is a linear combination of beams; it has a subset of orthogonal beams to be used for the linear combination, and has amplitude and phase for each layer and each polarization for each beam. The preferred pre-decoder for a layer may be a combination of beams and associated quantization coefficients, and the UE may feed the selected beams and coefficients back to the BS.

[0123] The UE can report CSI feedback based on CSI reporting configuration and CSI reporting triggering. For example, the UE can measure the channel associated with the CSI of the triggered CSI-RS resource. Based on these measurements, the UE can select a preferred CSI-RS resource. The UE reports CSI feedback for the selected CSI-RS resource. CQI can be calculated based on the reported PMI, RI, and CRI; PMI can be calculated based on the reported RI and CRI; and RI can be calculated based on the reported CRI.

[0124] FIG. 7 The contents of CSI Report 700 are described. CSI Report 700 includes a first part and a second part. The first part of the CSI Report may have a fixed payload size (e.g., it may be smaller than the second part of the CSI Report) and is transmitted with higher reliability. The BS is able to determine the larger payload size of the second part of the CSI Report based on decoding the first part of the CSI Report.

[0125] The first part of the CSI report indicates the amount of RI, CQI, and non-zero coefficients (NZC) (e.g., the total number of NZCs across all layers). RI and NZC can be used to determine the payload size in the second part of the CSI report.

[0126] The second part of the CSI report includes one or more fields to indicate spatial domain (SD) beam selection, frequency domain (FD) basis selection for different layers, strongest coefficient indication (SCI) for different layers, coefficient bitmap selection for different layers, and NZC quantization for different layers. For example, the second part of the CSI report may include a field indicating SD beam selection. This field indicates L SD bases (beams) out of a total of N1N2O1O2 SD bases. N1 and N2 are determined by the number of antennas in the horizontal and vertical directions of the panel. O1 and O2 indicate direct Fourier transform (DFT) oversampling. O1 determines the scan step size in the horizontal direction, and O2 determines the scan step size in the vertical direction. In some cases, the higher O1 and O2 are, the smaller the scan step size of the beam (i.e., the finer the angle).

[0127] In some cases, the combination coefficient table is defined based on a standard (e.g., ...). FIG. 8 (As depicted in Figure 800) The combination selection process for L SD base pairs (e.g., out of a total of N1N2 SD bases) is hard-coded. For example... FIG. 8 As depicted in the table, the values ​​of N1 and N2 can be up to 16, and the value of L can be up to 6.

[0128] In massive MIMO systems with a large number of antenna ports (e.g., 128 ports), the value of N1N2 may also be higher (e.g., 64). This high value of N1N2 is not supported in the current standard definition table, which specifies a maximum value of 16. Furthermore, in such cases, the selected L SD bases / beams may also need to be larger (e.g., larger than the maximum of 6 supported in the current standard definition table), because each beam may be narrower due to the larger number of antenna ports, and therefore each beam is associated with fewer propagation paths.

[0129] In some cases, updating the current standard definition table to support larger values ​​for N1, N2, and L will make the standard definition table too large. Since the current standard definition table is firmware-based and embedded in the UE's chipset hardware, any increase in the size of the standard definition table will require more memory, resulting in a larger chipset in the UE. Aspects Related to Grid-Based Spatial Domain (SD) Selection

[0130] This disclosure provides apparatus, methods, processing systems, and computer-readable media for grid-based SD base selection in a panel (e.g., an antenna panel). For example, SD bases with consecutive indices in the panel may be aggregated into SD grids. That is, each SD grid may include multiple SD bases with consecutive indices. A user equipment (UE) may select a subset of SD grids (rather than SD bases) from the set of SD grids. Within each SD grid in the subset of SD grids, the UE may select one or more SD bases. The UE may generate and transmit a Channel State Information (CSI) report indicating the subset of SD grids and / or one or more SD bases within each SD grid in the subset of SD grids.

[0131] The technique for grid-based SD base selection proposed in this paper can be found at [reference needed]. FIG. 9 through FIG. 21 To understand.

[0132] FIG. 9 Call flowchart 900 illustrates an example communication between a UE and a network entity (e.g., a base station (BS)) for grid-based SD base selection in a panel. FIG. 9 The UE shown can be relative to FIG. 1 and FIG. 3 The UE 104 and / or described and illustrated FIG. 10 Examples of UEs depicted in the document.FIG. 9 The network entities described in the text can be relative to FIG. 1 and FIG. 3 The BS 102 described and depicted, relative to FIG. 2 The decomposed BS and / or described FIG. 10 Examples of BS as depicted in the text.

[0133] As indicated at 905, the UE selects a first number of SD grids from a plurality of SD grids. Each of these SD grids includes or is associated with a plurality of SD bases (e.g., corresponding to a plurality of SD beams). SD bases with consecutive indices can be aggregated into SD grids. In one example, a first set of SD bases with consecutive indices can be aggregated into a first SD grid. In another example, a second set of SD bases with consecutive indices can be aggregated into a second SD grid. Each SD grid may include a different SD base.

[0134] In some respects, SD bases with consecutive indices can correspond to the same scattering. For example, nearby SD beams corresponding to nearby SD bases can have similar propagation paths and correspond to the same scattering. FIG. 10 As depicted in Figure 1000, a first set of SD beams with continuous indexes and associated with a first propagation path (e.g., from the BS) may correspond to a first scattering, and a second set of SD beams with continuous indexes and associated with a second propagation path (e.g., from the BS) may correspond to a second scattering.

[0135] exist FIG. 11 In an example panel depicted in Figure 1100, N1 and N2 indicate the number of antennas in the horizontal and vertical directions of the panel. For example, when the values ​​of N1 and N2 are equal to 8, there are 64 ports in the panel (e.g., corresponding to SD bases). In this example, the panel can be divided into 16 SG grids, where each 2×2 SD grid can include 4 ports (or SD bases). Therefore, in this example panel... In this context, existing standard-defined combination coefficient tables (as noted above) can be used to select L SD grids. For example, the UE uses... From the units digit Select L grid SD grid. L grid An SD grid may include a first SD grid and a second SD grid.

[0136] In another example, the value of N1 is equal to 8, and the value of N2 is equal to 4. In this example panel, there are 32 ports (e.g., corresponding to SD bases). The panel can be divided into 16 SG grids, where each 2×1 SD grid can include 2 ports or SD bases.

[0137] Re-reference FIG. 9 As indicated at 910, the UE selects one or more SD bases within each SD grid in a first number of SD grids. For example, for each selected SD base selection within a selected SD grid, the UE can use a bitmap to indicate the selected SD base within the selected SD grid. For example, SD grid (b grid There are 4 bitmaps, each with a size of, for example, 2×2 or 2×1. In this example, the UE can select a bitmap in each selected SD grid to indicate the selection of the corresponding SD base within the selected SD grid.

[0138] As indicated at 915, the UE sends a CSI report to the BS. The CSI report indicates a first number of SD grids, and one or more SD bases within each of the first number of SD grids.

[0139] In one example, a first field or portion of the CSI report may indicate a first number of SD grids, and a second field or portion of the CSI report may indicate one or more SD bases within each of the first number of SD grids.

[0140] In another example, the first field or section of the CSI report may indicate the first number of SD grids, and one or more SD bases within each of the first number of SD grids.

[0141] In some respects, at least one of the plurality of SD grids comprises a plurality of consecutive SD bases. The plurality of consecutive SD bases may include cyclically consecutive SD bases (i.e., the SD base indices may be wrapped around (i.e., are cyclic)).

[0142] like FIG. 12 As depicted in Figure 1200, for a uniform linear array (ULA) with N1=8, SD bases #7 and #0 can have adjacent orientations. In this example, SD bases #7 and #0 can be considered as consecutive SD bases and placed in the same SD grid.

[0143] In some respects, the UE sends an indication of the SD grid offset (e.g., corresponding to the division in multiple SD grids) to the BS in the CSI report. For example, FIG. 13Figure 1300 depicts different SD grids 1310, 1320, 1330, and 1340. In such cases, the UE can indicate the SD grid offset corresponding to the division in the different SD grids 1310, 1320, 1330, and 1340 in the third field or section of the CSI report. For example, the CSI report can indicate a two-bit SD grid offset for a 2×2 SD grid (N1 and N2 are each 1 bit). In some cases, the differences in SD grids 1310, 1320, 1330, and 1340 based on SD grid offsets can improve the flexibility of SD grids 1310, 1320, 1330, and 1340 to accommodate one or more scattering patterns.

[0144] In some respects, the UE reports a first number of SD grids in its CSI report. In one example, the first number of SD grids may be equal to the configured maximum value. In another example, the first number of SD grids may be less than the configured maximum value. The BS determines the configured maximum value and subsequently provides it to the UE.

[0145] In some respects, the UE reports a value for the first number of SD grids in the first part of the CSI report. For example, (e.g., corresponding to the first number of SD grids) L grid The value can be included in the first part of the CSI report because the payload size of the SD beam selection may vary with L. grid And the changes. Further information related to SD beam selection is in the second part of the CSI report. In one example, L grid The value can be equal to Ones place, of which It can be the maximum number of SD grids, and It can be the minimum number of SD grids. Corresponds to the SD grid size.

[0146] In one respect, It can be equal to L (e.g., the number of SD bases (beams)). On the other hand, It can be defined by a standard. On the other hand, It can be configured via the network, and The value of can be less than L.

[0147] In some respects, the UE receives the first number of configuration values ​​for the SD mesh from the BS. For example, L grid The link between the value and L can be defined by the standard or configured by the BS. In one example, for an SD grid size... (2×2), L equals 2L grid In another example, for SD grid size (2×1), L equals 1.5 Lgrid .

[0148] FIG. 14 Example illustration 1400 depicts the narrowness of SD base (e.g., digital beamforming) and analog beamforming (i.e., hybrid beamforming) on ​​the mid-frequency band (e.g., higher frequency range 1 (e.g., 3 GHz to 6 GHz) or frequency range 3 (FR2) (7 GHz to 24 GHz)). A digital beamforming for an eight-port ULA and an analog beamforming for three element dipole pairs per port can be used to perform hybrid beamforming.

[0149] Beamforming is a technique used to engineer the distribution of emissions from an antenna, directing electromagnetic energy along a specific path or angle. The structure required to perform beamforming is an antenna array, or a group of antennas spaced regularly in two dimensions. The direction of the transmitted beam can be controlled by manipulating the relative phase and amplitude of the signals transmitted to the phased array. The number of possible transmitted beams can be further doubled by utilizing polarization, or by emitting electromagnetic radiation in only one direction from each transmitter in the array.

[0150] Analog beamforming works by sending signals to multiple antennas in an antenna array. The signal sent to each antenna can be delayed by a specific time window, which applies a phase difference to the transmissions emitted from each antenna in the array. These antenna arrays are better known as phased arrays, and applying a phase difference has historically been the dominant method for beamforming in radio frequency (RF) systems.

[0151] In digital beamforming, multiple modulated signals are transmitted to an antenna array, and the phase and amplitude of the signals transmitted to the array are combined to produce a desired beam pattern. The most basic case uses a single input data stream transmitted to multiple antennas, and the amplitudes are combined to produce a desired transmission pattern.

[0152] Hybrid beamforming (also known as hybrid pre-decoding) is a method that enables the use of massively multi-input multiple-output (MIMO) antenna arrays at lower power. In traditional antenna arrays, each antenna requires a dedicated RF chain to transmit and receive each data stream; with hybrid pre-decoding, each stream requires a dedicated RF chain. This significantly reduces the number of RF chains, thereby reducing cost and power. The analog outputs of each chain are combined into a network of analog RF gains and phase shifters (analog RF beamformers) connected to a large antenna array where the number of antennas is greater than the number of streams. These analog units cannot change their weights rapidly; however, the calculated RF weights change slowly over time because they are primarily determined by the spatial location of the receivers. Digital baseband pre-decoding weights may change with symbols due to smaller-scale multipath effects and may also change with factor carriers to account for frequency-selective fading.

[0153] In some respects, the UE selects a first number of frequency domain (FD) bases having a continuous index of at least one SD base associated with a first number of SD grids. For example, for a selected SD base (e.g., a digital beam), an M base with a continuous index can be selected. per-beam A set of FD bases.

[0154] In some respects, each beam M per-beam Continuous (e.g., single-delay) FD selection is layer-specific (e.g., for the same beam and scattering). The initial number of FD bases may differ for different layers because different layers may each have their own FD phase rotation.

[0155] In some respects, the first number of values ​​for the FD basis pertains to at least one of the beam, polarization, and / or layer. For example, M per-beam The values ​​can be specific to beam and / or polarization and layer. The UE can report M in the first FD selection field of the second part of the CSI report. per-beam The value of M. In one example, for a certain layer, M per-beam A value equal to zero is possible for a given beam. In another example, for M greater than zero... per-beam The UE can select more than one FD basis. In one aspect, the UE can select one or two FD basis bases, since these FD basis bases can be located within the main delay lobe. In another aspect, the UE can select three or four FD basis bases with one or two strongest sidelobes.

[0156] FIG. 15 A diagram 1500 depicts an example amplitude and delay of the beam for the first subcarrier spacing (SCS) and the first bandwidth portion (BWP). In this example, the first SCS is equal to 30 kHz, and the first BWP is equal to 52 resource blocks (RBs).

[0157] FIG. 16 A diagram 1600 depicts an example amplitude and delay of the beams used for the first SCS and the second BWP. In this example, the first SCS is equal to 30 kHz, and the second BWP is equal to 128 RBs.

[0158] FIG. 17 Figure 1700 illustrates an example amplitude and delay for the beam used for the first SCS and the third BWP. In this example, the first SCS is equal to 30 kHz, and the third BWP is equal to 272 RBs. FIG. 15 through FIG. 17 As described in the paper, for higher BWP with the same SCS, there is a higher latency value.

[0159] In some respects, the UE reports to the BS an index of at least one of the beams, polarizations, or layers corresponding to a first number of values ​​of the FD base. For example, the UE may use a first FD selection field (e.g., in the second part of the CSI report) to report M per-beam ( i, p, l The value of ), where the index { i, p, l These are respectively for beam, polarization, and layer.

[0160] In some respects, the UE reports the starting index of the first number of FD bases selected to the BS in the second FD selection field of the second part of the CSI report. For example, the UE may use the second FD selection field (e.g., also in the second part of the CSI report) to report the starting index of the selected consecutive FD bases (e.g., based on M in the first FD selection field). per-beam ( i, p, l ()>0). For example, the UE can report each non-zero M per-beam ( i, p, l )of Ones place, of which This indicates the FD base length, i.e., the number of subbands. In some cases, the first FD selection field and the second FD selection field can be the same field (e.g., by using the start and length indicator value (SLIV)).

[0161] In some respects, the UE reports the total number of non-zero first-order FD bases to the BS in the first part of the CSI report. For example, the UE may report non-zero M in the first part of the CSI report. per-beam ( i, p, l The total number of ) allows the BS to know the payload size of the second FD selection field after decoding the first part of the CSI report.

[0162] In some respects, each of the first selected FD bases is associated with a quantization of a non-zero coefficient (NZC). For example, for the selected M... per-beam ( i, p, l For each of the FD bases > 0, it is related to (e.g., The reported quantization of an NZC (e.g., 3-bit amplitude and 4-bit 16-bit phase shift keying (PSK) phase) is associated with this.

[0163] In some respects, the UE may report the sum in the first part of the CSI report. This allows the BS to know, after decoding the first part of the CSI report, that... The payload size quantized by coefficients. In some respects, the sum of thresholds (e.g., maximum values). This can be configured by the BS. In one example, the threshold summation value can be configured per layer. In another example, the threshold summation value can be configured across all layers. Example Method for Wireless Communications at a User Equipment (UE)

[0164] FIG. 18 It shows the use of user equipment (UE) (such as FIG. 1 and FIG. 3 An example of a method 1800 for wireless communication at UE 104.

[0165] Method 1800 begins with step 1810, which involves selecting a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases. In some cases, this step refers to the operation as described in the reference... FIG. 20 The circuitry and / or code described for selection, or the circuitry and / or code for selection that can be executed by the circuitry and / or code for selection.

[0166] Method 1800 then proceeds to step 1820, which involves sending an indication of the selected first number of SD grids to the network entity in the Channel State Information (CSI) report. In some cases, this step refers to the operation as described in reference... FIG. 20 The circuitry and / or code described for transmitting, or the code for transmitting, may be executed by the circuitry and / or code for transmitting.

[0167] In some respects, the selection includes selecting one or more SD bases within each SD grid of the first number of SD grids; and the transmission includes sending the indication in the CSI report to the network entity of the selected one or more SD bases within each SD grid of the first number of SD grids.

[0168] In some respects, at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

[0169] In some respects, the plurality of consecutive SD bases include cyclically consecutive SD bases.

[0170] In some respects, this transmission includes sending an additional indication to the network entity in the CSI report of the SD grid offset corresponding to the division in the plurality of SD grids.

[0171] In some respects, method 1800 also includes reporting the value of the first quantity of the SD grid in the first part of the CSI report.

[0172] In some respects, the value of this first quantity of the SD mesh is equal to or less than the maximum value configured.

[0173] In some respects, method 1800 also includes receiving the first number of configuration values ​​of the SD mesh from the network entity.

[0174] In some respects, method 1800 further includes: selecting a first number of frequency domain (FD) bases having a continuous index of at least one SD base associated with the first number of SD grids.

[0175] In some respects, the first number of values ​​of the FD base refers to at least one of the beam, polarization, or layer.

[0176] In some respects, method 1800 further includes reporting the value of the first number of FD bases to the network entity in the first FD selection field of the second part of the CSI report.

[0177] In some respects, the report includes reporting to the network entity an index of at least one of the beams, polarizations, or layers corresponding to the first number of values ​​of the FD base.

[0178] In some respects, the report includes, in the second FD selection field of the second part of the CSI report, reporting to the network entity the starting index of the first number of FD bases selected.

[0179] In some respects, method 1800 also includes reporting to the network entity, in the first part of the CSI report, the total number of non-zero first number of FD bases.

[0180] In some respects, each of the first number of FD bases selected is associated with a quantization of a non-zero coefficient (NZC).

[0181] In one aspect, method 1800 or any aspect thereof may be made by means of a device (such as...) FIG. 20 The communication device 2000 is used to perform the method 1800, which includes various components capable of operating, being configured, or adapted to perform the method. The communication device 2000 is described in more detail below.

[0182] It should be noted that FIG. 18 This is just one example of a method, and other methods that include fewer, additional, or alternative steps may be consistent with this disclosure. Example Method for Wireless Communications at a Network Entity

[0183] FIG. 19 It shows the use of network entities (such as FIG. 1 and FIG. 3 Example of a method for wireless communication at BS 102 (1900).

[0184] Method 1900 begins with step 1910, which involves sending at least one Channel State Information (CSI) reference signal (RS) to the User Equipment (UE). In some cases, this step refers to the operation of referencing... FIG. 21 The circuitry and / or code described for transmitting, or the code for transmitting, may be executed by the circuitry and / or code for transmitting.

[0185] Method 1900 then proceeds to step 1920, which, in response to the at least one CSI-RS, receives a CSI report from the UE indicating the selection of a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases. In some cases, the operation of this step refers to, as referenced FIG. 21 The circuitry and / or code described for receiving, or the code for receiving, may be executed by the circuitry and / or code for receiving.

[0186] In some respects, at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

[0187] In some respects, the plurality of consecutive SD bases include cyclically consecutive SD bases.

[0188] In some respects, method 1900 also includes receiving the first quantity of values ​​for the SD grid in the first part of the CSI report.

[0189] In some respects, the value of this first quantity of the SD mesh is equal to or less than the maximum value configured.

[0190] In some respects, method 1900 also includes sending the first number of configuration values ​​of the SD mesh to the UE.

[0191] In one aspect, method 1900 or any aspect thereof may be made by means of a device (such as...) FIG. 21 The communication device 2100 performs the execution, and the device includes various components capable of operating, being configured, or adapted to perform the method 1900. The communication device 2100 is described in more detail below.

[0192] It should be noted that FIG. 19 This is just one example of a method, and other methods that include fewer, additional, or alternative steps may be consistent with this disclosure. Example Communication Device

[0193] FIG. 20 Various aspects of the example communication device 2000 are described. In some aspects, the communication device 2000 is user equipment (UE), as described above relative to... FIG. 1 and FIG. 3The UE 104 described.

[0194] Communication device 2000 includes a processing system 2005 coupled to transceiver 2045 (e.g., transmitter and / or receiver). Transceiver 2045 is configured to transmit and receive signals for communication device 2000, such as the various signals described herein, via antenna 2050. Processing system 2005 may be configured to perform processing functions of communication device 2000, including processing signals received by communication device 2000 and / or to be transmitted by communication device.

[0195] The processing system 2005 includes one or more processors 2010. In various aspects, the one or more processors 2010 may represent one or more of a receive processor 358, a transmit processor 364, a TX MIMO processor 366, and / or a controller / processor 380, as relative to... FIG. 3 As described. One or more processors 2010 are coupled to a computer-readable medium / memory 2025 via a bus 2040. In some aspects, the computer-readable medium / memory 2025 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 2010, cause the one or more processors 2010 to perform relative to FIG. 18 The described method 1800 and / or any aspect related to that method. It should be noted that references to processors performing the functions of communication device 2000 may include one or more processors 2010 performing those functions of communication device 2000.

[0196] In the depicted example, computer-readable medium / memory 2025 stores code (e.g., executable instructions), such as code 2030 for selection and code 2035 for transmission. Processing the code 2030 for selection and the code 2035 for transmission enables the communication device 2000 to perform actions relative to... FIG. 18 The described method 1800 and / or any aspect related to that method.

[0197] One or more processors 2010 include circuitry configured to implement (e.g., execute) code stored in computer-readable medium / memory 2025, including circuitry such as selection circuitry 2015 and transmission circuitry 2020. Processing using selection circuitry 2015 and transmission circuitry 2020 enables communication device 2000 to perform operations relative to… FIG. 18 The described method 1800 and / or any aspect related to that method.

[0198] The various components of the communication device 2000 can provide for performing relative FIG. 18The described method 1800 and / or any components related to that method. For example, components for transmitting, conveying, or outputting for transmission may include... FIG. 3 The transceiver 354 and / or antenna 352 of UE 104 illustrated herein, and / or FIG. 17 The communication device 2000 includes a transmitting circuit 2020, a transmitting code 2035, a transceiver 2045, and an antenna 2050. Components for receiving or acquiring data may include... FIG. 3 The transceiver 354 and / or antenna 352 of the UE 104 illustrated herein FIG. 20 The transceiver 2045 and antenna 2050 of the communication equipment 2000.

[0199] In some cases, a device may not actually transmit, for example, signals and / or data, but may have an interface (an output component) for outputting signals and / or data for transmission. For example, a processor may output signals and / or data to a radio frequency (RF) front-end via a bus interface for transmission. In various aspects, an RF front-end may include a variety of components, including, for example, in... FIG. 3 The examples depict transmit and receive processors, transmit and receive MIMO processors, modulators, demodulators, etc.

[0200] In some cases, a device may not actually receive signals and / or data, but may have an interface (a component for receiving) for acquiring signals and / or data received from another device. For example, a processor may acquire (or receive) signals and / or data from an RF front-end via a bus interface for reception. In various aspects, an RF front-end may include a variety of components, including, for example, in FIG. 3 The examples depict transmit and receive processors, transmit and receive MIMO processors, modulators, demodulators, etc. It is worth noting that... FIG. 20 This is just an example, and many other examples and configurations of the communication device 2000 are possible.

[0201] FIG. 21 Various aspects of the example communication device 2100 are described. In some aspects, the communication device 2100 is a network entity, such as... FIG. 1 and FIG. 3 BS 102 or as relative to FIG. 2 The decomposed base station under discussion.

[0202] Communication device 2100 includes a processing system 2105 coupled to a transceiver 2155 (e.g., a transmitter and / or receiver) and / or a network interface 2165. Transceiver 2155 is configured to transmit and receive signals for communication device 2100 via antenna 2160, such as various signals as described herein. Network interface 2165 is configured to transmit and receive signals for communication device 2100 via a communication link (such as, as described herein, relative to...). FIG. 2 The described backhaul link, midhaul link, and / or fronthaul link acquire and transmit signals for communication device 2100. Processing system 2105 can be configured to perform processing functions of communication device 2100, including processing signals received by and / or to be transmitted by communication device 2100.

[0203] Processing system 2105 includes one or more processors 2110. In various aspects, the one or more processors 2110 may represent one or more of a receive processor 338, a transmit processor 320, a TX MIMO processor 330, and / or a controller / processor 340, as relative to... FIG. 3 As described. One or more processors 2110 are coupled to a computer-readable medium / memory 2130 via a bus 2150. In some aspects, the computer-readable medium / memory 2130 is configured to store instructions (e.g., computer-executable code) that, when executed by one or more processors 2110, cause one or more processors 2110 to perform relative to FIG. 19 The described method 1900 or any aspect thereof. It should be noted that references to the processor performing the function of the communication device 2100 may include one or more processors 2110 of the communication device 2100 performing that function.

[0204] In the depicted example, computer-readable medium / memory 2130 stores code (e.g., executable instructions), such as code 2135 for transmitting and code 2140 for receiving. Processing the code 2135 for transmitting and the code 2140 for receiving enables the communication device 2100 to perform operations relative to... FIG. 19 The method described in 1900 or any aspect related to that method.

[0205] One or more processors 2110 include circuitry configured to implement (e.g., execute) code stored in computer-readable medium / memory 2130, including circuitry such as circuitry 2115 for transmitting and circuitry 2120 for receiving. Processing using the circuitry 2115 for transmitting and the circuitry 2120 for receiving enables the communication device 2100 to perform operations relative to… FIG. 19 The method described in 1900 or any aspect related to that method.

[0206] The various components of the communication device 2100 can provide for performing relative to FIG. 19 The described method 1900 or any aspect thereof. Components for transmitting, conveying, or outputting for transmission may include... FIG. 3 The transceiver 332 and / or antenna 334 of the BS102 illustrated herein, and / or FIG. 21 The communication device 2100 includes a circuit 2115 for transmitting, a code 2135 for transmitting, a transceiver 2155, and an antenna 2160. Components for receiving or acquiring may include... FIG. 3 The transceiver 332 and / or antenna 334 of the BS102 illustrated herein, and / or FIG. 21 The communication device 2100 includes a receiving circuit 2120, a receiving code 2140, a transceiver 2155, and an antenna 2160.

[0207] In some cases, a device may not actually transmit, for example, signals and / or data, but may have an interface (a component for output) for outputting signals and / or data for transmission. For example, a processor may output signals and / or data to an RF front-end for transmission via a bus interface. In various aspects, an RF front-end may include a variety of components, including, for example, in... FIG. 3 The examples depict transmit and receive processors, transmit and receive MIMO processors, modulators, demodulators, etc.

[0208] In some cases, a device may not actually receive signals and / or data, but may have an interface (a component for receiving) for acquiring signals and / or data received from another device. For example, a processor may acquire (or receive) signals and / or data from an RF front-end via a bus interface for reception. In various aspects, an RF front-end may include a variety of components, including, for example, in FIG. 3 The examples depict transmit and receive processors, transmit and receive MIMO processors, modulators, demodulators, etc. It is worth noting that... FIG. 21 This is just one example, and many other examples and configurations of the communication device 2100 are possible. Example Clauses

[0209] Specific implementation examples are described in the following numbered clauses: Clause 1: A method for wireless communication at a user equipment (UE), the method comprising: selecting a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases; and sending an indication of the selected first number of SD grids to a network entity in a channel state information (CSI) report.

[0210] Clause 2: The method according to Clause 1, wherein: the selection includes selecting one or more SD bases within each SD grid of the first number of SD grids; and the sending includes sending the indication to the network entity in the CSI report for the selected one or more SD bases within each SD grid of the first number of SD grids.

[0211] Clause 3: The method according to any one of Clauses 1 to 2, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

[0212] Clause 4: The method according to Clause 3, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

[0213] Clause 5: The method according to any one of Clauses 1 to 4, wherein the sending includes sending to the network entity in the CSI report another indication of the SD grid offset corresponding to the division in the plurality of SD grids.

[0214] Clause 6: The method according to any one of Clauses 1 to 5 further includes: reporting the value of the first quantity of SD grids in the first part of the CSI report.

[0215] Clause 7: The method according to any one of Clauses 1 to 6, wherein the value of the first quantity of the SD mesh is equal to or less than the maximum value configured.

[0216] Clause 8: The method according to any one of Clauses 1 to 7 further comprises: receiving the first number of configuration values ​​of the SD mesh from the network entity.

[0217] Clause 9: The method according to any one of Clauses 1 to 8 further comprises: selecting a first number of frequency domain (FD) bases having a continuous index of at least one SD base associated with the first number of SD grids.

[0218] Clause 10: The method according to Clause 9, wherein the first number of values ​​of the FD base is directed to at least one of the beam, polarization, or layer.

[0219] Clause 11: The method according to Clause 10 further includes: reporting the value of the first number of FD bases to the network entity in the first FD selection field of the second part of the CSI report.

[0220] Clause 12: The method according to Clause 11, wherein the reporting includes reporting to the network entity an index of at least one of the beam, the polarization, or the layer corresponding to the first number of the values ​​of the FD base.

[0221] Clause 13: The method according to Clause 11, wherein the report includes reporting to the network entity the starting index of the first number of FD bases selected in the second FD selection field of the second part of the CSI report.

[0222] Clause 14: The method according to Clause 9 further includes: reporting to the network entity, in the first part of the CSI report, the total number of non-zero first number of FD bases.

[0223] Clause 15: The method described in Clause 9, wherein each of the first number of FD bases selected is associated with a quantization of a non-zero coefficient (NZC).

[0224] Clause 16: A method for wireless communication at a network entity, the method comprising: transmitting at least one Channel State Information (CSI) Reference Signal (RS) to a User Equipment (UE); and receiving a CSI report from the UE in response to the at least one CSI-RS, the CSI report indicating the selection of a first number of SD grids from a plurality of Spatial Domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases.

[0225] Clause 17: The method according to Clause 16, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

[0226] Clause 18: The method according to Clause 17, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

[0227] Clause 19: The method according to any one of Clauses 16 to 18, the method further comprising: receiving the first number of values ​​of the SD grid in the first part of the CSI report.

[0228] Clause 20: The method according to any one of Clauses 16 to 19, wherein the value of the first quantity of the SD mesh is equal to or less than the maximum value configured.

[0229] Clause 21: The method according to any one of Clauses 16 to 20, the method further comprising: sending the first number of configuration values ​​of the SD mesh to the UE.

[0230] Clause 22: An apparatus comprising: a memory including executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform a method according to any one of Clauses 1 to 21.

[0231] Clause 23: An apparatus comprising components for performing the method according to any one of Clauses 1 to 21.

[0232] Clause 24: A non-transitory computer-readable medium comprising executable instructions that, when executed by a processor of a device, cause the device to perform the method according to any one of Clauses 1 to 21.

[0233] Clause 25: A computer program product embodied on a computer-readable storage medium, the computer program product comprising code for performing a method according to any one of Clauses 1 to 21. Additional Notes

[0234] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein do not limit the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, the function and arrangement of the elements discussed may be changed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in various examples. For example, the described methods may be performed in a different order than described, and various actions may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Moreover, the scope of this disclosure is intended to cover such apparatuses or methods practiced using other structures, functionalities, or structures and functionalities that complement or replace the various aspects of this disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of these claims.

[0235] The various exemplary logic blocks, modules, and circuits described in this disclosure can be implemented or executed using a general-purpose processor, digital signal processor (DSP), ASIC, field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic device, discrete hardware component, or any combination thereof designed to perform the functions described herein. While the general-purpose processor may be a microprocessor, in alternative embodiments, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, a system-on-a-chip (SoC), or any other such configuration.

[0236] As used herein, "processor," "at least one processor," or "one or more processors" generally refers to a single processor configured to perform one or more operations, or multiple processors configured to collectively perform one or more operations. In the case of multiple processors, the execution of one or more operations may be divided among different processors, but one processor may perform multiple operations, and multiple processors may collectively perform a single operation. Similarly, "memory," "at least one memory," or "one or more memory" generally refers to a single memory configured to store data and / or instructions, or multiple memories configured to collectively store data and / or instructions.

[0237] As used in this article, the phrase “at least one of” in a list of items refers to any combination of these items (including single members). As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0238] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" can include calculation, operation, processing, deduction, investigation, lookup (e.g., searching in a table, database, or other data structure), assertion, etc. Additionally, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), etc. Furthermore, "determine" can include parsing, selecting, picking, building, etc.

[0239] The methods disclosed herein include one or more actions for implementing the methods. These actions may be interchanged without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and / or use of a particular action may be modified without departing from the scope of the claims. Furthermore, the various operations of the methods described above may be performed by any suitable component capable of performing the corresponding function. This component may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors.

[0240] The following claims are not intended to be limited to the aspects shown herein, but should be given the full scope consistent with the language of the claims. Within the claims, unless specifically stated otherwise, reference to the singular form of an element is not intended to mean “one and only one,” but rather “one or more.” Unless specifically stated otherwise, the term “some” refers to one or more. No element of any claim shall be interpreted in accordance with 35 USC §112(f) unless that element is explicitly stated using the phrase “for a component of.” All structural and functional equivalents of the elements throughout the various aspects described herein that are known to a person of ordinary skill in the art, or will later be known, are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is explicitly recited in the claims.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory, the memory including instructions; and One or more processors, individually or in any combination, are configured to execute the instructions and cause the device to: A first number of SD grids are selected from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases; and In the Channel State Information (CSI) report, an indication of the first number of SD grids selected is sent to the network entity.

2. The apparatus according to claim 1, wherein: The selection includes selecting one or more SD bases within each SD grid of the first number of SD grids; and The transmission includes sending the indication to the network entity in the CSI report for one or more selected SD bases within each of the first number of SD grids.

3. The apparatus of claim 1, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

4. The apparatus of claim 3, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

5. The apparatus of claim 1, wherein the transmission includes sending to the network entity in the CSI report another indication of the SD grid offset corresponding to the division in the plurality of SD grids.

6. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: report the value of the first number of SD grids in the first portion of the CSI report.

7. The apparatus of claim 1, wherein the value of the first quantity of the SD grid is equal to or less than the configured maximum value.

8. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: receive the first number of configuration values ​​of the SD mesh from the network entity.

9. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: select a first number of frequency domain (FD) bases having consecutive indices of at least one SD base associated with the first number of SD grids.

10. The apparatus of claim 9, wherein the first number of values ​​of the FD base is directed to at least one of beam, polarization, or layer.

11. The apparatus of claim 10, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: report the value of the first number of FD bases to the network entity in the first FD selection field of the second portion of the CSI report.

12. The apparatus of claim 11, wherein the report includes reporting to the network entity an index of at least one of the beam, the polarization, or the layer corresponding to the first number of the values ​​of the FD base.

13. The apparatus of claim 11, wherein the report includes reporting to the network entity the starting index of the first number of FD bases selected in the second FD selection field of the second portion of the CSI report.

14. The apparatus of claim 9, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: report to the network entity, in the first part of the CSI report, the total number of a non-zero first number of FD bases.

15. The apparatus of claim 9, wherein each of the selected first number of FD bases is associated with a quantization of a non-zero coefficient (NZC).

16. An apparatus for wireless communication at a network entity, the apparatus comprising: Memory, the memory including instructions; and One or more processors, individually or in any combination, are configured to execute the instructions and cause the device to: Send at least one Channel State Information (CSI) Reference Signal (RS) to User Equipment (UE); as well as In response to the at least one CSI-RS, a CSI report is received from the UE, the CSI report indicating the selection of a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids includes a plurality of SD bases.

17. The apparatus of claim 16, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

18. The apparatus of claim 17, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

19. The apparatus of claim 16, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: receive the first number of values ​​of the SD grid in the first portion of the CSI report.

20. The apparatus of claim 16, wherein the value of the first quantity of the SD grid is equal to or less than the configured maximum value.

21. The apparatus of claim 16, wherein the one or more processors are further configured to execute the instructions and cause the apparatus to: send the first number of configuration values ​​of the SD mesh to the UE.

22. A method for conducting wireless communication at a user equipment (UE), the method comprising: A first number of SD grids are selected from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids comprises a plurality of SD bases; as well as In the Channel State Information (CSI) report, an indication of the first number of SD grids selected is sent to the network entity.

23. The method of claim 22, wherein: The selection includes selecting one or more SD bases within each SD grid of the first number of SD grids; and The transmission includes sending the indication to the network entity in the CSI report for one or more selected SD bases within each of the first number of SD grids.

24. The method of claim 22, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

25. The method of claim 24, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

26. The method of claim 22, wherein the sending includes sending to the network entity in the CSI report another indication of the SD grid offset corresponding to the division in the plurality of SD grids.

27. The method according to claim 22, further comprising: The first number of values ​​for the SD grid is reported in the first part of the CSI report.

28. A method for conducting wireless communication at a network entity, the method comprising: Send at least one Channel State Information (CSI) Reference Signal (RS) to User Equipment (UE); as well as In response to the at least one CSI-RS, a CSI report is received from the UE, the CSI report indicating the selection of a first number of SD grids from a plurality of spatial domain (SD) grids, wherein each of the plurality of SD grids includes a plurality of SD bases.

29. The method of claim 28, wherein at least one of the plurality of SD grids comprises a plurality of consecutive SD bases.

30. The method of claim 29, wherein the plurality of consecutive SD bases comprises cyclically consecutive SD bases.

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