Codebook design with different oversampling factors

Abstract

Aspects relate to a codebook for uplink transmission. In some examples, different oversampling factors may be used for an uplink codebook and a downlink codebook based on the same antenna configuration. In some examples, a user equipment may send an indication of an antenna configuration to a network entity. In some examples, a network entity may identify a codebook based on an antenna configuration of a user equipment.

Description

Technical Field

[0001] The techniques discussed below relate generally to wireless communications, and more particularly to using different oversampling factors for different codebooks. Background Art

[0002] A next generation wireless communication system (e.g., 5GS) may include a 5G core network and a 5G radio access network (RAN) (e.g., new radio (NR)-RAN). NR-RAN supports communication via one or more cells. For example, a wireless communication device such as a user equipment (UE) may access a first cell of a first base station (BS) such as a gNB and / or access a second cell of a second base station.

[0003] The base station may schedule access to the cell to support access by multiple UEs. For example, the base station may allocate different resources (eg, time domain resources and frequency domain resources) to be used by different UEs operating within the cell. Summary of the invention

[0004] An overview of one or more aspects of the present disclosure is presented below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all expected features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in a form as a preface to a more detailed description presented later.

[0005] In some examples, the user equipment may include a memory and a processor coupled to the memory. The processor and the memory may be configured to receive a transmit pre-decoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The processor and the memory may also be configured to send an uplink transmission based on the TPMI to the network entity.

[0006] In some examples, a method for wireless communication at a user equipment is disclosed. The method may include receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The method may also include sending an uplink transmission based on the TPMI to the network entity.

[0007] In some examples, the user equipment may include a component for receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The user equipment may also include a component for sending an uplink transmission based on the TPMI to the network entity.

[0008] In some examples, a non-transitory computer-readable medium stores instructions therein that can be executed by one or more processors of a user equipment to receive a transmit pre-decoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook that is based on a first antenna configuration and a first oversampling factor of the user equipment. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the user equipment to send an uplink transmission based on the TPMI to the network entity.

[0009] In some examples, the user equipment may include a memory and a processor, the processor being coupled to the memory. The processor and the memory may be configured to send a first indication of a first antenna configuration associated with the user equipment to a network entity. The processor and the memory may also be configured to receive from the network entity a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration. The processor and the memory may be further configured to send to the network entity a first uplink transmission of a first uplink codebook based on the codebook set.

[0010] In some examples, a method for wireless communication at a user equipment is disclosed. The method may include sending a first indication of a first antenna configuration associated with the user equipment to a network entity. The method may also include receiving a second indication of a codebook set for uplink transmission from the network entity, the codebook set based on the first antenna configuration. The method may also include sending a first uplink transmission based on a first uplink codebook of the codebook set to the network entity.

[0011] In some examples, the user equipment may include a component for sending a first indication of a first antenna configuration associated with the user equipment to a network entity. The user equipment may also include a component for receiving a second indication of a codebook set for uplink transmission from the network entity, the codebook set being based on the first antenna configuration. The user equipment may also include a component for sending a first uplink transmission of a first uplink codebook based on the codebook set to the network entity.

[0012] In some examples, a non-transitory computer-readable medium stores instructions therein that can be executed by one or more processors of a user equipment to send a first indication of a first antenna configuration associated with the user equipment to a network entity. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the user equipment to receive from the network entity a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the user equipment to send a first uplink transmission based on the first uplink codebook set to the network entity.

[0013] In some examples, the network entity may include a memory and a processor coupled to the memory. The processor and the memory may be configured to send a transmit pre-decoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The processor and the memory may also be configured to receive an uplink transmission based on the TPMI from the user equipment.

[0014] In some examples, a method for wireless communication at a network entity is disclosed. The method may include sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The method may also include receiving an uplink transmission based on the TPMI from the user equipment.

[0015] In some examples, the network entity may include a component for sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment. The network entity may also include a component for receiving an uplink transmission based on the TPMI from the user equipment.

[0016] In some examples, a non-transitory computer-readable medium stores instructions therein that can be executed by one or more processors of a network entity to send a transmit pre-decoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook that is based on a first antenna configuration and a first oversampling factor of the user equipment. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the network entity to receive an uplink transmission based on the TPMI from the user equipment.

[0017] In some examples, the network entity may include a memory and a processor, the processor being coupled to the memory. The processor and the memory may be configured to receive a first indication of a first antenna configuration associated with the user equipment from a user equipment. The processor and the memory may also be configured to send a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration. The processor and the memory may be further configured to receive a first uplink transmission of a first uplink codebook based on the codebook set from the user equipment.

[0018] In some examples, a method for wireless communication at a network entity is disclosed. The method may include receiving, from a user equipment, a first indication of a first antenna configuration associated with the user equipment. The method may also include sending, to the user equipment, a second indication of a codebook set for uplink transmissions, the codebook set being based on the first antenna configuration. The method may also include receiving, from the user equipment, a first uplink transmission of a first uplink codebook based on the codebook set.

[0019] In some examples, the network entity may include a component for receiving a first indication of a first antenna configuration associated with the user equipment from a user equipment. The network entity may also include a component for sending a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration. The network entity may also include a component for receiving a first uplink transmission of a first uplink codebook based on the codebook set from the user equipment.

[0020] In some examples, a non-transitory computer-readable medium stores instructions therein that can be executed by one or more processors of a network entity to receive a first indication of a first antenna configuration associated with the user equipment from a user equipment. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the network entity to send a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration. The computer-readable medium may also store instructions therein that can be executed by one or more processors of the network entity to receive a first uplink transmission based on the first uplink codebook of the codebook set from the user equipment.

[0021] After studying the specific embodiments below, these and other aspects of the present disclosure will become more fully understood. After studying the description of the specific example aspects of the present disclosure below in conjunction with the accompanying drawings, other aspects, features and examples of the present disclosure will be apparent to those of ordinary skill in the art. Although the features of the present disclosure may be discussed below with respect to certain examples and drawings, all examples of the present disclosure may include one or more of the advantageous features discussed herein. In other words, although one or more examples may be discussed as having certain advantageous features, one or more of such features may also be used according to the various examples of the present disclosure discussed herein. In a similar manner, although the example aspects may be discussed below as device, system or method examples, it should be understood that such example aspects may be implemented in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic illustration of a wireless communication system according to some aspects.

[0023] Figure 2 is a conceptual illustration of an example radio access network in accordance with some aspects.

[0024] Figure 3 is a diagram providing a high-level illustration of one example of a configuration of a decomposed base station in accordance with some aspects.

[0025] Figure 4 is a schematic illustration of wireless resources in an air interface utilizing orthogonal frequency division multiplexing (OFDM) in accordance with some aspects.

[0026] Figure 5 is a diagram illustrating an example of a codebook according to some aspects.

[0027] Figure 6 is a diagram illustrating additional examples of codebooks according to some aspects.

[0028] Figure 7 is a diagram illustrating another example of a codebook according to some aspects.

[0029] Figure 8 is a signaling diagram illustrating an example of signaling associated with communication of codebook related information in accordance with some aspects.

[0030] Fig. 9 is a diagram illustrating indication of layers and transmitted precoder matrix indicators according to some aspects.

[0031] Fig.10 is a conceptual illustration of antenna configurations according to some aspects.

[0032] Fig.11is a diagram illustrating examples of different oversampling factors for different antenna configurations in accordance with some aspects.

[0033] Fig.12 is a conceptual illustration of a uniform planar array antenna configuration and a uniform linear array antenna configuration according to some aspects.

[0034] Fig.13 is a signaling diagram illustrating an example of signaling associated with communication of codebook related information in accordance with some aspects.

[0035] Fig.14 is a block diagram conceptually illustrating an example of a hardware implementation for user equipment employing a processing system in accordance with some aspects.

[0036] Fig.15 is a flow chart illustrating an example method of wireless communications involving codebook-based communications in accordance with some aspects.

[0037] Fig.16 is a flow chart illustrating an example method of wireless communications involving sending an indication of an antenna configuration in accordance with some aspects.

[0038] Fig.17 is a flow chart illustrating an example method of wireless communications involving codebook-based communications in accordance with some aspects.

[0039] Fig.18 is a block diagram conceptually illustrating an example of a hardware implementation for a network entity employing a processing system in accordance with some aspects.

[0040] Fig.19 is a flow chart illustrating an example method of wireless communications involving codebook-based communications in accordance with some aspects.

[0041] Fig. 20 is a flow chart illustrating an example wireless communication method involving receiving an indication of an antenna configuration in accordance with some aspects.

[0042] Fig.21 is a flow chart illustrating an example method of wireless communications involving codebook-based communications in accordance with some aspects. DETAILED DESCRIPTION

[0043] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, it is apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0044] Although various aspects and examples are described in this application by illustrating some examples, it will be understood by those skilled in the art that additional specific implementations and use cases can be generated in many different arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, various aspects and / or use can be generated via integrated chip examples and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may or may not specifically point to use cases or applications, the applicability of a wide range of described innovations may occur. Specific implementations can range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed, or original equipment manufacturer (OEM) devices or systems in conjunction with one or more aspects of the described innovations. In some actual settings, the device incorporating the described aspects and features may also necessarily include additional components and features for the implementation and implementation of the claimed and described examples. For example, the transmission and reception of wireless signals necessarily include several components for analog and digital purposes (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a variety of devices of different sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, disaggregated arrangements (e.g., base stations and / or UEs), end-user devices, etc.

[0045]

[0013] Aspects of the present disclosure relate to codebooks for uplink transmissions. In some examples, the codebooks for uplink transmissions may support antenna configurations with eight antenna elements.

[0046] In some examples, different oversampling factors may be used for uplink codebooks and downlink codebooks based on the same antenna configuration. For example, a first oversampling factor may be used to construct a downlink codebook for a 2×2 uniform planar array antenna configuration, while a second oversampling factor different from the first oversampling factor may be used to construct an uplink codebook for a 2×2 uniform planar array antenna configuration.

[0047] In some examples, the user equipment may send an indication of the antenna configuration of the user equipment to the network entity. The network entity may then identify an uplink codebook for the user equipment based on the antenna configuration of the user equipment. Thus, the network entity may indicate different codebooks to different user equipments based on the antenna configuration of each user equipment.

[0048] The various concepts presented throughout this disclosure may be implemented across a wide variety of telecommunication systems, network architectures, and communication standards. Figure 1 , various aspects of the present disclosure are illustrated with reference to a wireless communication system 100 as an illustrative example and not as a limitation. The wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106. By means of the wireless communication system 100, the UE 106 may be enabled to perform data communications with an external data network 110, such as (but not limited to) the Internet.

[0049] The RAN 104 may implement any suitable one or more wireless communication technologies to provide radio access to the UE 106. As an example, the RAN 104 may operate in accordance with the 3rd Generation Partnership Project (3GPP) New Radio (NR) specification, commonly referred to as 5G. As another example, the RAN 104 may operate under a mix of 5G NR and an evolved universal terrestrial radio access network (eUTRAN) standard, commonly referred to as Long Term Evolution (LTE). 3GPP refers to such a hybrid RAN as the Next Generation RAN or NG-RAN. In another example, the RAN 104 may operate in accordance with both the LTE and 5G NR standards. Of course, many other examples may be utilized within the scope of the present disclosure.

[0050] As illustrated, RAN 104 includes multiple base stations 108. In a broad sense, a base station is a network element in a radio access network that is responsible for radio transmission and reception to or from a UE in one or more cells. In different technologies, standards or contexts, a base station may be referred to as a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a Node B (NB), an eNode B (eNB), a gNode B (gNB), a transmission and reception point (TRP) or some other suitable terminology by those skilled in the art. In some examples, a base station may include two or more TRPs that may be co-located or non-co-located. Each TRP may communicate on the same or different carrier frequencies in the same or different frequency bands. In an example where RAN 104 operates according to both LTE and 5G NR standards, one of the base stations in base station 108 may be an LTE base station, and another base station may be a 5G NR base station.

[0051] The radio access network 104 is also illustrated as supporting wireless communications for multiple mobile devices. The mobile device may be referred to as a user equipment (UE) 106 in the 3GPP standard, but may also be referred to as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a mobile phone, a terminal, a user agent, a mobile client, a client, or some other suitable terminology by those skilled in the art. UE 106 may be a device that provides access to network services to a user. In an example where RAN 104 operates according to both LTE and 5G NR standards, UE 106 may be an evolved universal terrestrial radio access network-new radio dual connectivity (EN-DC) UE that is capable of simultaneously connecting to an LTE base station and an NR base station to receive data packets from both the LTE base station and the NR base station.

[0052] In this document, a mobile device does not necessarily have the ability to move and can be stationary. The term mobile device or mobile device refers to a wide variety of devices and technologies. A UE may include multiple hardware structural components whose size, shape, and arrangement facilitate communication; such components may include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. that are electrically coupled to each other. For example, some non-limiting examples of mobile devices include mobile devices, cellular (cell) phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebooks, netbooks, smart books, tablet devices, personal digital assistants (PDAs), and a wide variety of embedded systems, for example, corresponding to the Internet of Things (IoT).

[0053] The mobile device may additionally be a car or other transportation vehicle, a remote sensor or actuator, a robot or robotic device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-rotor aircraft, a quadcopter, a remote control device, a consumer and / or wearable device (such as glasses, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., an MP3 player), a camera, a game console, etc. The mobile device may additionally be a digital home or smart home device (such as home audio, video and / or multimedia equipment), an appliance, a vending machine, a smart lighting device, a home security system, a smart meter, or the like. Table, etc. The mobile device can additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls electrical power (e.g., a smart grid), lighting, water supply, etc., an industrial automation and enterprise device, a logistics controller and / or agricultural equipment, etc. In addition, the mobile device can provide connected medical or telemedicine support, such as health care at a distance. Telemedicine devices can include telemedicine monitoring devices and telemedicine management devices, whose communications can be given priority or priority access over other types of information, for example, in terms of priority access for the transmission of critical service data and / or related QoS for the transmission of critical service data.

[0054] The wireless communication between RAN 104 and UE 106 can be described as utilizing an air interface. Transmissions from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) over the air interface can be referred to as downlink (DL) transmissions. In some examples, the term downlink can refer to point-to-multipoint transmissions initiated at a base station (e.g., base station 108). Another way to describe this point-to-multipoint transmission scheme can be to use the term broadcast channel multiplexing. Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) can be referred to as uplink (UL) transmissions. In some examples, the term uplink can refer to point-to-point transmissions originated at a UE (e.g., UE 106).

[0055] In some examples, access to the air interface may be scheduled, where a scheduling entity (e.g., a base station 108) of some other type of network entity allocates resources for communication among some or all devices and equipment within its service area or cell. Within the present disclosure, as discussed further below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities (e.g., UEs). That is, for scheduled communications, multiple UEs 106 (which may be scheduled entities) may utilize resources allocated by a scheduling entity (e.g., a base station 108).

[0056] Base station 108 is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other UEs). For example, a UE can communicate with other UEs in a peer-to-peer or device-to-device manner and / or in a relay configuration.

[0057] like Figure 1 As illustrated, a scheduling entity (e.g., base station 108) may broadcast downlink traffic 112 to one or more scheduled entities (e.g., UE 106). Broadly speaking, a scheduling entity is a node or device responsible for scheduling traffic in a wireless communication network, including downlink traffic 112 and, in some examples, uplink traffic 116 and / or uplink control information 118 from one or more scheduled entities to the scheduling entity. On the other hand, a scheduled entity is a node or device that receives downlink control information 114, which includes, but is not limited to, scheduling information (e.g., grants), synchronization or timing information, or other control information from another entity in the wireless communication network, such as a scheduling entity.

[0058] In addition, uplink control information 118, downlink control information 114, downlink traffic 112 and / or uplink traffic 116 may be divided into frames, subframes, time slots and / or symbols by time. As used herein, a symbol may refer to a time unit in which each subcarrier carries one resource element (RE) in an orthogonal frequency division multiplexing (OFDM) waveform. In some examples, a time slot may carry 7 or 14 OFDM symbols. A subframe may refer to a duration of 1 millisecond (ms). Multiple subframes or time slots may be grouped together to form a single frame or radio frame. In the present disclosure, a frame may refer to a predetermined duration (e.g., 10ms) for wireless transmission, wherein each frame is composed of, for example, 10 subframes of 1ms each. Of course, these definitions are not required, and any suitable scheme for organizing waveforms may be utilized, and the various time divisions of waveforms may have any suitable duration.

[0059] Typically, base stations 108 may include a backhaul interface for communicating with a backhaul 120 of the wireless communication system. Backhaul 120 may provide a link between base stations 108 and core network 102. Additionally, in some examples, a backhaul network may provide interconnections between respective base stations 108. Various types of backhaul interfaces may be employed, such as a direct physical connection using any suitable transport network, a virtual network, or the like.

[0060] The core network 102 may be part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 may be configured according to 5G standards (e.g., 5GC). In other examples, the core network 102 may be configured according to 4G Evolved Packet Core (EPC) or any other appropriate standard or configuration.

[0061] Reference now Figure 2 , by way of example and not limitation, a schematic illustration of a radio access network (RAN) 200 is provided. In some examples, the RAN 200 may be similar to the ones described above and in Figure 1 is the same as the RAN 104 illustrated in .

[0062] The geographic area covered by the RAN 200 may be divided into cells that may be uniquely identified by user equipment (UE) based on an identity broadcast from an access point or base station. Figure 2 Cells 202, 204, 206, and 208 are illustrated, each of which may include one or more sectors (not shown). A sector is a sub-area of ​​a cell. All sectors within a cell are served by the same base station. A radio link within a sector may be identified by a single logical identifier belonging to the sector. In a cell divided into sectors, multiple sectors within a cell may be formed by multiple groups of antennas, each of which is responsible for communicating with a UE in a portion of the cell.

[0063] Various base station arrangements can be used. Figure 2 , two base stations 210 and 212 are shown in cells 202 and 204; and base station 214 is shown as controlling a remote radio head (RRH) 216 in cell 206. That is, the base station may have an integrated antenna, or may be connected to an antenna or RRH by a feeder cable. In the illustrated example, cells 202, 204, and 206 may be referred to as macro cells, because base stations 210, 212, and 214 support cells with larger sizes. In addition, base station 218 is shown in cell 208, which may overlap with one or more macro cells. In this example, cell 208 may be referred to as a small cell (e.g., a micro cell, a pico cell, a femto cell, a home base station, a home Node B, a home eNodeB, etc.), because base station 218 supports a cell with a relatively small range. The cell size setting may be performed according to the system design and component constraints.

[0064] It should be understood that the RAN 200 may include any number of wireless base stations and cells. In addition, relay nodes may be deployed to extend the size or coverage area of ​​a given cell. Base stations 210, 212, 214, 218 provide wireless access points to the core network for any number of mobile devices. In some examples, base stations 210, 212, 214, and / or 218 may be similar to those described above and in Figure 1 The base station / scheduling entity illustrated in is the same.

[0065] Figure 2 Also included is an unmanned aerial vehicle (UAV) 220, which may be a drone or a quadcopter. UAV 220 may be configured to act as a base station, or more specifically, a mobile base station. That is, in some examples, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of a mobile base station (such as UAV 220).

[0066] Within the RAN 200, cells may include UEs that may communicate with one or more sectors of each cell. In addition, each base station 210, 212, 214, and 218 may be configured to provide a core network 102 (see FIG. 1 ) for all UEs in the respective cells. Figure 1 ) access point. For example, UEs 222 and 224 may communicate with base station 210; UEs 226 and 228 may communicate with base station 212; UEs 230 and 232 may communicate with base station 214 via RRH 216; and UE 234 may communicate with base station 218. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and / or 242 may communicate with the base stations described above and in Figure 1 In some examples, UAV 220 (e.g., a quadcopter) may be a mobile network node and may be configured to act as a UE. For example, UAV 220 may operate within cell 202 by communicating with base station 210.

[0067] In another aspect of RAN 200, sidelink signals can be used between UEs without relying on scheduling or control information from a base station. Sidelink communications can be utilized in device-to-device (D2D) networks, peer-to-peer (P2P) networks, vehicle-to-vehicle (V2V) networks, vehicle-to-everything (V2X) networks, and / or other suitable sidelink networks. For example, two or more UEs (e.g., UE 238, 240, and 242) can communicate with each other using sidelink signals 237 without relaying the communication through a base station. In some examples, UE 238, 240, and 242 can each act as a scheduling entity or a sender sidelink device and / or a scheduled entity or a receiver sidelink device to schedule resources and communicate sidelink signals 237 between them without relying on scheduling or control information from a base station. In other examples, two or more UEs (e.g., UEs 226 and 228) within the coverage area of ​​a base station (e.g., base station 212) may also communicate sidelink signals 227 via a direct link (sidelink) without routing the communication through base station 212. In this example, base station 212 may allocate resources to UEs 226 and 228 for sidelink communication.

[0068] In RAN 200, the ability for a UE to communicate while moving (independent of its location) is called mobility. This is usually done in an access and mobility management function (AMF, not shown). Figure 1 The AMF establishes, maintains and releases various physical channels between the UE and the radio access network under the control of the AMF (part of the core network 102), where the AMF may include a security context management function (SCMF) that manages the security context of both control plane and user plane functionalities and a security anchor function (SEAF) that performs authentication.

[0069] RAN 200 may utilize DL-based mobility or UL-based mobility to implement mobility and handover (i.e., the transfer of a UE's connection from one radio channel to another). In a network configured for DL-based mobility, during a call with a scheduling entity or at any other time, a UE may monitor various parameters of a signal from its serving cell and various parameters of neighboring cells. Based on the quality of these parameters, the UE may maintain communication with one or more neighboring cells. During this time, if the UE moves from one cell to another, or if the signal quality from a neighboring cell exceeds the signal quality from the serving cell for a given amount of time, the UE may perform a handover or handover from the serving cell to a neighboring (target) cell. For example, UE 224 (illustrated as a vehicle, but any suitable form of UE may be used) may move from a geographic area corresponding to its serving cell (e.g., cell 202) to a geographic area corresponding to a neighboring cell (e.g., cell 206). When the signal strength or quality from a neighboring cell exceeds the signal strength or quality of the serving cell for a given amount of time, UE 224 may send a report message indicating the condition to its serving base station (e.g., base station 210). In response, UE 224 may receive the handover command, and the UE may proceed with the handover to cell 206 .

[0070] In a network configured for UL-based mobility, the network can select a serving cell for each UE using a UL reference signal from each UE. In some examples, base stations 210, 212, and 214 / 216 can broadcast a unified synchronization signal (e.g., a unified primary synchronization signal (PSS), a unified secondary synchronization signal (SSS), and a unified physical broadcast channel (PBCH)). UE222, 224, 226, 228, 230, and 232 can receive a unified synchronization signal, derive a carrier frequency and a time slot timing based on the synchronization signal, and send an uplink pilot or reference signal in response to the derived timing. The uplink pilot signal sent by a UE (e.g., UE 224) can be received concurrently by two or more cells (e.g., base stations 210 and 214 / 216) within RAN 200. Each of the cells may measure the strength of the pilot signal, and the radio access network (e.g., one or more of the base stations 210 and 214 / 216 and / or a central node within the core network) may determine a serving cell for the UE 224. As the UE 224 moves through the RAN 200, the network may continue to monitor the uplink pilot signal sent by the UE 224. When the signal strength or quality of the pilot signal measured by the neighboring cell exceeds the signal strength or quality measured by the serving cell, the RAN 200 may hand over the UE 224 from the serving cell to the neighboring cell with or without notifying the UE 224.

[0071] Although the synchronization signals transmitted by base stations 210, 212 and 214 / 216 may be uniform, the synchronization signal may not identify a specific cell, but may identify a zone of multiple cells operating on the same frequency and / or using the same timing. Using zones in a 5G network or other next generation communication network implements an uplink-based mobility framework and improves the efficiency of both the UE and the network, because the number of mobility messages that need to be exchanged between the UE and the network can be reduced.

[0072] In various specific implementations, the air interface in the RAN 200 may utilize licensed spectrum, unlicensed spectrum, or shared spectrum. Licensed spectrum typically provides exclusive use of a portion of the spectrum with the help of a mobile network operator purchasing a license from a government regulator. Unlicensed spectrum provides shared use of a portion of the spectrum without the need for a government-granted license. Although it is still generally necessary to comply with some technical rules to access the unlicensed spectrum, generally any operator or device can obtain access. Shared spectrum may fall between licensed spectrum and unlicensed spectrum, where access to the spectrum may require technical rules or restrictions, but the spectrum can still be shared by multiple operators and / or multiple radio access technologies (RATs). For example, a license holder of a portion of a licensed spectrum may provide licensed shared access (LSA) to share the spectrum with other parties (e.g., with appropriate licensee-determined conditions to obtain access).

[0073] The air interface in the RAN 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of various devices. For example, the 5G NR specification provides multiple access for UL transmissions from UEs 222 and 224 to the base station 210, and multiplexing of DL transmissions from the base station 210 to one or more UEs 222 and 224 using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP). In addition, for UL transmissions, the 5G NR specification provides support for discrete Fourier transform spread OFDM (DFT-s-OFDM) with CP (also known as single carrier FDMA (SC-FDMA)). However, within the scope of the present disclosure, multiplexing and multiple access are not limited to the above schemes, and may be provided using time division multiple access (TDMA), code division multiple access (CDMA), frequency division multiple access (FDMA), sparse code multiple access (SCMA), resource extension multiple access (RSMA) or other suitable multiple access schemes. In addition, multiplexing of DL transmissions from base station 210 to UEs 222 and 224 may be provided using time division multiplexing (TDM), code division multiplexing (CDM), frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), sparse code multiplexing (SCM), or other suitable multiplexing schemes.

[0074] In addition, the air interface in the RAN 200 may utilize one or more duplex algorithms. Duplex refers to a point-to-point communication link in which two endpoints can communicate with each other in two directions. Full-duplex means that two endpoints can communicate with each other at the same time. Half-duplex means that only one endpoint can transmit information to the other endpoint at a time. Half-duplex emulation is often implemented for wireless links using time division duplex (TDD). In TDD, transmissions in different directions on a given channel are separated from each other using time division multiplexing. That is, at certain times, the channel is dedicated to transmissions in one direction, and at other times, the channel is dedicated to transmissions in another direction, where the direction can change very quickly, for example, several times per time slot. In wireless links, full-duplex channels generally rely on physical isolation of transmitters and receivers, and suitable interference cancellation techniques. Full-duplex emulation is often implemented for wireless links by utilizing frequency division duplex (FDD) or space division duplex (SDD). In FDD, transmissions in different directions operate at different carrier frequencies. In SDD, transmissions in different directions on a given channel are separated from each other using space division multiplexing (SDM). In other examples, full-duplex communication can be implemented in an unpaired spectrum (e.g., in a single carrier bandwidth), where transmissions in different directions occur in different sub-bands of the carrier bandwidth. This type of full-duplex communication may be referred to as sub-band full-duplex (SBFD), cross duplex (xDD), or flexible duplex.

[0075] The deployment of a communication system (such as a 5G New Radio (NR) system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0076] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0077] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configurations such as those initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0078] Figure 3 A diagram illustrating an example decomposed base station 300 architecture is shown. The decomposed base station 300 architecture may include one or more central units (CUs) 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more decomposed base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 325 via an E2 link, or a non-real-time (non-RT) RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more distributed units (DUs) 330 via respective midhaul links, such as an F1 interface. The DU 330 may communicate with one or more radio units (RUs) 340 via respective fronthaul links. The RU 340 may communicate with respective UEs 350 via one or more radio frequency (RF) access links. In some implementations, a UE 350 may be served simultaneously by multiple RUs 340.

[0079] Each of the units (i.e., CU 310, DU 330, RU 340, and near-RT RIC 325, non-RT RIC 315, and SMO framework 305) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive or send signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0080] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface configured to communicate signals with other control functions hosted by CU 310. CU310 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 310 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, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 310 may be implemented to communicate with a distributed unit (DU) 330 for network control and signaling.

[0081] DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340. In some aspects, DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) based at least in part on functional splits such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 330 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 330 or with control functions hosted by CU 310.

[0082] The lower layer functionality may be implemented by one or more RUs 340. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that 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.), or both, based at least in part on functional splitting (such as lower layer functional splitting). In such an architecture, the RU 340 may be implemented to handle over-the-air (OTA) communications with one or more UEs 350. In some specific implementations, the real-time and non-real-time aspects of communicating with the control plane and user plane of the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable the implementation of the DU 330 and the CU 310 in a cloud-based RAN architecture (such as a vRAN architecture).

[0083] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some specific implementations, the SMO framework 305 may communicate directly with one or more RUs 340 via the O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305 .

[0084] The non-RT RIC 315 may be configured to include logic functions that implement non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or communicate with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that implement near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0085] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to adjust RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0086] Reference will be made to the OFDM waveform (an example of which is given in Figure 4 Various aspects of the present disclosure are described in detail with reference to Figure 1 (illustrated schematically in Figure 2). It should be understood by those skilled in the art that various aspects of the present disclosure can be applied to SC-FDMA waveforms in substantially the same manner as described herein below. That is, while some examples of the present disclosure may focus on OFDM links for clarity, it should be understood that the same principles can also be applied to SC-FDMA waveforms.

[0087] Reference now Figure 4 , illustrates an expanded view of an example subframe 402 showing an OFDM resource grid. However, as will be readily appreciated by those skilled in the art, the physical (PHY) layer transmission structure for any particular application may differ from the examples described herein, depending on any number of factors. Here, time is in units of OFDM symbols in the horizontal direction; and frequency is in units of subcarriers of a carrier in the vertical direction.

[0088] Resource grid 404 can be used to schematically represent the time-frequency resources for a given antenna port. In some examples, an antenna port is a logical entity for mapping a data stream to one or more antennas. Each antenna port can be associated with a reference signal (e.g., this can allow a receiver to distinguish data streams associated with different antenna ports in a received transmission). Antenna ports can be defined so that the channel on which a symbol on the antenna port is transmitted can be inferred from the channel on which another symbol on the same antenna port is transmitted. Therefore, a given antenna port can represent a specific channel model associated with a specific reference signal. In some examples, a given antenna port and a subcarrier spacing (SCS) can be associated with a corresponding resource grid (including REs as discussed above). Here, modulated data symbols from a multiple-input multiple-output (MIMO) layer can be combined and redistributed to each antenna port in the antenna port, and then pre-decoding is applied, and the pre-decoded data symbols are applied to the corresponding REs for generating and transmitting OFDM signals via one or more physical antenna elements. In some examples, the mapping of antenna ports to physical antennas can be based on beamforming (e.g., signals can be sent on certain antenna ports to form a desired beam). Thus, a given antenna port may correspond to a particular set of beamforming parameters (eg, signal phase and / or amplitude).

[0089] In a MIMO implementation with multiple available antenna ports, a corresponding number of resource grids 404 may be available for communication. Resource grid 404 is divided into multiple resource elements (REs) 406. RE (which is 1 subcarrier × 1 symbol) is the smallest discrete portion of the time-frequency grid and contains a single complex value representing data from a physical channel or signal. Depending on the modulation utilized in a particular implementation, each RE may represent one or more bits of information. In some examples, a block of REs may be referred to as a physical resource block (PRB), or more simply a resource block (RB) 408, which may contain any suitable number of consecutive subcarriers in the frequency domain. In one example, an RB may include 12 subcarriers (a number independent of the parameter set used). In some examples, depending on the parameter set, an RB may include any suitable number of consecutive OFDM symbols in the time domain. Within the present disclosure, it is assumed that a single RB (such as RB 408) corresponds entirely to communication in a single direction (transmission or reception for a given device).

[0090] A collection of contiguous or discontinuous resource blocks may be referred to herein as a resource block group (RBG), a subband, or a bandwidth part (BWP). A collection of subbands or BWPs may span the entire bandwidth. Scheduling a scheduled entity (e.g., a UE) for downlink, uplink, or sidelink transmission typically involves scheduling one or more resource elements 406 within one or more subbands or bandwidth parts (BWPs). Thus, a UE typically utilizes only a subset of a resource grid 404. In some examples, an RB may be the smallest resource unit that may be allocated to a UE. Thus, the more RBs scheduled for a UE, and the higher the modulation scheme selected for the air interface, the higher the data rate for the UE. The RB may be scheduled by a scheduling entity such as a network entity (e.g., a gNB, an eNB, etc.), or may be self-scheduled by a UE implementing D2D sidelink communication.

[0091] In this illustration, RB 408 is shown as occupying less than the entire bandwidth of subframe 402, with some subcarriers illustrated above and below RB 408. In a given implementation, subframe 402 may have a bandwidth corresponding to any number of one or more RBs 408. Furthermore, in this illustration, RB 408 is shown as occupying less than the entire duration of subframe 402, although this is only one possible example.

[0092] Each 1 ms subframe 402 may consist of one or more adjacent time slots. Figure 4 In the example shown, as an illustrative example, a subframe 402 includes four time slots 410. In some examples, a time slot may be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot may include 7 or 14 OFDM symbols with a nominal CP. Additional examples may include micro-slots (sometimes referred to as shortened transmission time intervals (TTIs)) with shorter durations (e.g., one to three OFDM symbols). These micro-slots or shortened transmission time intervals (TTIs) may be transmitted in some cases by occupying resources that are scheduled for ongoing time slot transmissions for the same UE or different UEs. Any number of resource blocks may be utilized within a subframe or time slot.

[0093] An expanded view of one of the time slots 410 illustrates that the time slot 410 includes a control region 412 and a data region 414. In general, the control region 412 may carry control channels, and the data region 414 may carry data channels. Of course, a time slot may contain full DL, full UL, or at least one DL portion and at least one UL portion. Figure 4 The structure illustrated in is merely an example, and different time slot structures may be utilized and may include one or more of each of the control region and the data region.

[0094] Although in Figure 4Although not illustrated in the figure, each RE 406 within the RB 408 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc. Other REs 406 within the RB 408 may also carry pilot signals or reference signals. These pilot signals or reference signals may be provided to a receiving device to perform channel estimation of the corresponding channel, which may enable coherent demodulation / detection of control channels and / or data channels within the RB 408.

[0095] In some examples, time slot 410 may be utilized for broadcast, multicast, groupcast, or unicast communications. For example, broadcast, multicast, or groupcast communications may refer to point-to-multipoint transmissions from one device (e.g., a network entity, UE, or other similar device) to other devices. Here, broadcast communications are delivered to all devices, while multicast or groupcast communications are delivered to multiple intended receiving devices. Unicast communications may refer to point-to-point transmissions from one device to a single other device.

[0096] In an example of cellular communication on a cellular carrier via a Uu interface, for DL ​​transmission, a scheduling entity (e.g., a network entity) may allocate one or more REs 406 (e.g., within a control region 412) to one or more scheduled entities (e.g., UEs) to carry DL control information including one or more DL control channels (such as a physical downlink control channel (PDCCH)). The PDCCH carries downlink control information (DCI), including but not limited to power control commands (e.g., one or more open-loop power control parameters and / or one or more closed-loop power control parameters), scheduling information, grants, and / or assignments of REs for DL ​​transmission and UL transmission. The PDCCH may further carry a hybrid automatic repeat request (HARQ) feedback transmission, such as an acknowledgement (ACK) or a negative acknowledgement (NACK). HARQ is a technique well known to those of ordinary skill in the art, wherein the integrity of a packet transmission may be checked for accuracy at the receiving side, for example, using any appropriate integrity check mechanism, such as a checksum or a cyclic redundancy check (CRC). If the integrity of the transmission is confirmed, an ACK may be sent, and if it is not confirmed, a NACK may be sent. In response to the NACK, the sending device may transmit a HARQ retransmission, which may implement trace combining, incremental redundancy, and the like.

[0097] The network entity may further allocate one or more REs 406 (e.g., in the control region 412 or the data region 414) to carry other DL signals, such as a demodulation reference signal (DMRS); a phase tracking reference signal (PT-RS); a channel state information (CSI) reference signal (CSI-RS); and a synchronization signal block (SSB). The SSB may be broadcast at regular intervals based on a periodicity (e.g., 5ms, 10ms, 20ms, 30ms, 80ms, or 130ms). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast control channel (PBCH). The UE may utilize the PSS and SSS to achieve radio frame, subframe, time slot, and symbol synchronization in the time domain, identify the center of the channel (system) bandwidth in the frequency domain, and identify the physical cell identity (PCI) of the cell.

[0098] The PBCH in the SSB may also include a master information block (MIB) containing various system information and parameters for decoding a system information block (SIB). The SIB may be, for example, SystemInformationType 1 (SIB1), which may include various additional (remaining) system information. The MIB and SIB1 together provide minimum system information (SI) for initial access. Examples of system information sent in the MIB may include, but are not limited to, subcarrier spacing (e.g., default downlink parameter set), system frame number, configuration of the PDCCH control resource set (CORESET) (e.g., PDCCH CORESET0), cell barring indicator, cell reselection indicator, grid offset, and search space for SIB1. Examples of remaining minimum system information (RMSI) sent in SIB1 may include, but are not limited to, random access search space, paging search space, downlink configuration information, and uplink configuration information. The network entity may also send other system information (OSI).

[0099] In UL transmission, the UE may utilize one or more REs 406 to carry UL control information (UCI) to the scheduling entity, and the UL control information (UCI) includes one or more UL control channels, such as a physical uplink control channel (PUCCH). The UCI may include various packet types and categories, including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmission. Examples of uplink reference signals may include sounding reference signals (SRS) and uplink DMRS. In some examples, the UCI may include a scheduling request (SR), i.e., requesting the scheduling entity to schedule uplink transmission. In this article, in response to the SR sent on the UCI, the scheduling entity may send downlink control information (DCI), which may schedule resources for uplink packet transmission. The UCI may also include HARQ feedback, channel state feedback (CSF) (such as a CSI report), or any other appropriate UCI.

[0100] In addition to control information, one or more REs 406 (e.g., within the data region 414) may also be allocated for data traffic. Such data traffic may be carried on one or more traffic channels, such as for DL ​​transmissions, on a physical downlink shared channel (PDSCH); or for UL transmissions, on a physical uplink shared channel (PUSCH). In some examples, one or more REs 406 within the data region 414 may be configured to carry other signals, such as one or more SIBs and DMRS.

[0101] In an example of sidelink communication on a sidelink carrier via a proximity service (ProSe) PC5 interface, a control region 412 of a time slot 410 may include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) sent by an initiating (transmitting) sidelink device (e.g., a transmitting (Tx) V2X device or other Tx UE) toward a set of one or more other receiving sidelink devices (e.g., a receiving (Rx) V2X device or some other Rx UE). A data region 414 of the time slot 410 may include a physical sidelink shared channel (PSSCH) including sidelink data traffic sent by the initiating (transmitting) sidelink device within resources reserved by the transmitting sidelink device on the sidelink carrier via the SCI. Other information may also be sent via various REs 406 within the time slot 410. For example, the HARQ feedback information may be sent from the receiving side link device to the transmitting side link device in a physical sidelink feedback channel (PSFCH) within time slot 410. Additionally, one or more reference signals may be sent within time slot 410, such as a sidelink SSB, a sidelink CSI-RS, a sidelink SRS, and / or a sidelink positioning reference signal (PRS).

[0102] These physical channels described above are typically multiplexed and mapped to transport channels for processing at the medium access control (MAC) layer. The transport channels carry information blocks called transport blocks (TBs). Based on the modulation and coding scheme (MCS) and the number of RBs in a given transmission, the transport block size (TBS), which may correspond to the number of information bits, may be a controlled parameter.

[0103] References Figures 1 to 4 The channels or carriers described are not necessarily all channels or carriers that may be utilized between a scheduling entity and a scheduled entity, and one of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those illustrated, such as other traffic, control, and feedback channels.

[0104] In some examples, uplink transmissions by a user equipment (UE) may be based on a codebook. In some aspects, the codebook may specify a set of precoder matrices. Conventionally, a precoder matrix may be referred to as a precoder.

[0105] In some aspects, the precoder may map a set of values ​​(e.g., zero, one, etc.) to another set of values ​​(e.g., a set of complex values) for transmission (e.g., via an antenna port). In different examples, the precoder may take different forms. For example, a first precoder may take the form [0, 1, 0, 1] T , the second pre-decoder can take the form [0,1,0,j]T , the third pre-decoder can take the form [0,1,0,-j] T Etc. In some examples, different pre-decoders may be defined for different numbers of antenna ports, different numbers of antenna elements, different numbers of MIMO layers, or other parameters. In some examples, the codebook and associated pre-decoders are pre-defined (e.g., defined by a wireless communication standard). In some examples, the codebook and associated pre-decoders are algorithmically determined (e.g., based on an algorithm and parameters defined by a wireless communication standard).

[0106] Figures 5 to 7 Several examples of codebooks that may be used for uplink transmissions are illustrated. Figure 5 The illustrated codebook 502 may be used for rank 1 (single-layer) discrete Fourier transform-spread-OFDM (DFT-S-OFDM) transmissions using two antenna elements, or for rank 1 cyclic prefix OFDM (CP-OFDM) transmissions using two antenna elements. Figure 5 The illustrated codebook 504 may be used, at least in part, for rank 1 (single-layer) DFT-S-OFDM transmission using four antenna elements. Figure 6 The illustrated codebook 602 may be used for rank 2 (two-layer) CP-OFDM transmission using two antenna elements. Figure 6 The illustrated codebook 604 may be used, at least in part, for rank 3 (three-layer) CP-OFDM transmissions using four antenna elements. Figure 6 The illustrated codebook 606 may be used, at least in part, for rank-4 (four-layer) CP-OFDM transmissions using four antenna elements. Figure 7 The illustrated codebook 702 may be used, at least in part, for rank 2 CP-OFDM transmission using four antenna elements. In other examples, other codebooks may be used.

[0107] Figure 8 is a signaling diagram 800 illustrating an example of signaling associated with communication of codebook related information in a wireless communication system including a network entity 802 and a user equipment 804. In some examples, the network entity 802 may correspond to Figure 1 , Figure 2 , Figure 3 , Fig.13 and Fig.18 In some examples, the user equipment 804 may correspond to a network entity, a base station, a CU, a DU, a RU, or any of the network entities shown in any of the examples. Figure 1 to Figure 2 , Figure 3 , Fig.13 and Fig.14 Any UE or scheduled entity shown in any of the figures.

[0108] exist Figure 8At 806, the network entity 802 sends configuration information to the user equipment 804 (e.g., via broadcast information and / or RRC signaling). In some examples, the configuration information may indicate different codebooks and associated pre-decoders that may be used for uplink transmissions and / or downlink transmissions. In some examples, the configuration information may include SRS configuration information that specifies SRS resources and other parameters to be used by the user equipment 804 to send SRS. For example, the network entity 802 may configure one or more SRS resource sets for the user equipment 804.

[0109] At 808, the user equipment 804 transmits a sounding reference signal to the network entity 802 via one or more antenna ports. In some examples, the user equipment 804 may use different sets of resources and transmit on different symbols. In some examples, a defined number of antenna ports may be used for each SRS resource.

[0110] At 810, the network entity 802 estimates an uplink channel (H) from the user equipment 804 to the network entity 802 based on the sounding reference signal received at 808. For example, since the SRS is a known signal, the network entity 802 can estimate the channel based on known transmit (Tx) signals and receive (Rx) signals (affected by the channel).

[0111] At 812, the network entity 802 selects a precoding matrix within the uplink codebook for use in an uplink transmission by the user equipment 804. For example, the network entity 802 may determine which precoding matrix will provide the best performance for the uplink transmission being scheduled. The selected precoding matrix is ​​then mapped to a corresponding transmit precoder matrix index (TPMI) value.

[0112] At 814, the network entity 802 sends control signaling to the user equipment 804, wherein the control signaling indicates the TPMI selected at 812 and associated rank information for uplink transmission. For example, the network entity may send DCI 0_1 including a TPMI field to the user equipment 804 to schedule PDSCH transmission.

[0113] At 816, the user equipment 804 sends a physical uplink shared channel transmission to the network entity 802 using the TPMI and rank information received at 812. For example, using the TPMI received at 814, the user equipment 804 may identify a precoder to use for the PUSCH transmission from a configured codebook (e.g., the codebook configured at 806).

[0114] Fig. 9An example of TPMI and layer information 902 that a network entity may signal to a UE using a bit field is illustrated. Here, a given bit field value (e.g., 0...61) may be mapped to a corresponding number of layers and a specific TPMI index. For example, a value of nine (9) in the first column maps to two layers and a TPMI value of five (5).

[0115] Some wireless communication devices may include a relatively large number of antennas, and therefore a relatively large number of antenna ports. Examples of such devices include, but are not limited to, customer premises equipment (CPE), fixed wireless access (FWA) equipment, vehicle-based communication devices, and industrial communication devices.

[0116] The present disclosure relates in some aspects to codebook designs applicable to a relatively large number of antenna ports. For example, several uplink codebook designs are described herein for a scenario where a UE uses eight antenna ports for uplink transmission.

[0117] In some aspects, the present disclosure relates to using an existing codebook design (e.g., a 3GPP NR Rel-15 downlink (DL) type I codebook) as a starting point for an eight-port codebook design for a fully coherent (FC) UE. Directly reusing the NR DL codebook for an eight-port UL codebook design may have several disadvantages. For example, the TPMI size of the NR DL codebook is relatively large. Therefore, using this TPMI design will result in a relatively high signaling overhead associated with sending a TPMI indication. In addition, when a large number of ports are used, the NR DL codebook specifies a relatively large oversampling factor. This introduces non-orthogonal phase shift keying (non-QPSK) elements in the precoding matrix, which increases the complexity of the hardware that performs codebook related operations. For example, a precoding matrix having elements in {+1, -1, j, -j) will be preferred from a specific implementation perspective compared to a precoding matrix including more complex elements.

[0118] In the NR type-I codebook, the pre-coding vector is generated by the Kronecker product of the horizontal and vertical discrete Fourier transform (DFT) vectors. For example, N1O1 DFT vectors may be specified for the horizontal domain, and N2O2 DFT vectors may be defined for the vertical domain.

[0119] The parameters N1 and N2 refer to the number of antenna elements in the horizontal and vertical domains, respectively. Fig.10 An example of an antenna configuration 1000 is illustrated in which the number of antenna elements in the horizontal domain (N1) is four (4) and the number of antenna elements in the vertical domain (N2) is two (2).

[0120] In some examples, the codebook is defined based on two matrices W1 and W2. For such a W1W2 codebook structure, the matrix W1 is associated with the beam group selection. For rank-1, closely spaced horizontal DFT vectors and vertical DFT vectors can be selected. For higher ranks, orthogonal pairs of horizontal DFT vectors and vertical DFT vectors are selected. The matrix W2 can be associated with beam selection and the common phase between different poles.

[0121] Parameters O1 and O2 refer to oversampling factors in the horizontal and vertical domains, respectively. In some aspects, the oversampling factors are related to the granularity of the beam scanning in the corresponding domains. For example, a higher oversampling factor provides a beam scanning with a higher granularity.

[0122] The component beamforming vectors may be generated according to Equation 1.

[0123]

[0124] Common factors:

[0125] Fig.11 An example of mapping the number of antenna ports and antenna configurations to a specific oversampling factor is illustrated. For example, for transmission using eight (8) ports and a 2×2 (N1=N2=2) antenna array, O1=4=O2=4. As another example, for transmission using twelve (12) ports and a 6×1 (N1=6, N2=1) antenna array, O1=4 and O2=1.

[0126] The present disclosure relates in some aspects to an eight-port UL FC codebook design for different antenna layouts (e.g., for FWA devices and / or other wireless communication devices). In some examples, a discrete Fourier transform (DFT) codebook is defined with a smaller oversampling factor (e.g., as compared to a conventional NR DL codebook) to provide a precoding matrix with relatively simple quadrature phase shift keying (QPSK) elements. For example, oversampling factors O1 and O2 with a value of two (2) may be specified for a uniform planar array (UPA) antenna structure. As another example, an oversampling factor O1 with a value of one (1) may be specified for a uniform linear array (ULA) antenna structure. In some aspects, the use of a smaller oversampling factor may result in a negligible loss in system-level throughput performance compared to the system-level throughput performance when a larger oversampling factor is used. In addition, the use of a smaller oversampling factor may result in a smaller size of the TPMI (e.g., the size of the TPMI may be one-fourth the size of the TPMI when a larger oversampling factor is used).

[0127] In some aspects, the present disclosure also relates to indicating the UE antenna structure to the network entity. In this way, the network entity can define different codebook sets for different antenna structures. Therefore, UEs with different antenna structures can be indicated by different codebook sets.

[0128] In a first example, for a UPA (N1=2, N2=2) cross-pole (XPOL) layout, the FC codebook would conventionally be constructed based on NR DFT codewords with oversampling factors O1=O2=4. However, to provide a precoding matrix with elements in {+1, -1, j, -j}, the oversampling factor is instead reduced to O1=O2=2. In this case, the TPMI size is only one-fourth of the TPMI size for O1=O2=4. To further reduce the TPMI size, the oversampling factor can be reduced to O1=O2=1.

[0129] In the second example, for ULA (N1=4, N2=1) XPOL layout, the FC codebook will be conventionally constructed based on NR DFT codewords with oversampling factors O1=4, O2=1. However, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced to O1=1.

[0130] In a third example, for codebook-based UL transmission, different UL codebook sets (e.g., 8Tx codebook sets) may be indicated to the UE based on the UE's antenna structure. Here, the UE may report its antenna structure before SRS transmission for UL PUSCH scheduling. Upon receiving the antenna configuration information, the network entity may first indicate the selected codebook set (e.g., via RRC, MAC-CE, or DCI signaling) before indicating the TPMI to the UE.

[0131] The following are used Fig.12 1 and 2. Several examples of eight-element (8Tx) uplink codebooks for a 2×2 uniform planar array (UPA) 1202 layout illustrated in FIG. The UPA 1202 includes cross-pole antenna elements (eg, antenna elements 1 and 5 have different polarizations) such that the total number of antenna elements is eight (8).

[0132] An example uses the following as the 8T for UPA antenna structure xStarting point for (eight antenna elements), rank 1, UL codebook: NR DL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×4=256 pre-decoders. In some examples, to provide a pre-decoding matrix with elements in {+1, -1, j, -j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of pre-decoders to 64 pre-decoders. In some examples, to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of pre-decoders to 16 pre-decoders. The codebook equation for the above example is set forth in Equation 2.

[0133]

[0134] An example uses the following as the 8T for UPA antenna structure x , rank 2, starting point of UL codebook: NR DL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 pre-decoders. In some examples, in order to provide a pre-decoding matrix with elements in {+1, -1, j, -j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of pre-decoders to 32 pre-decoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of pre-decoders to 8 pre-decoders. The codebook equation for this scenario is set forth in Equation 2. The codebook equation for the above example is set forth in Equation 3.

[0135]

[0136] An example uses the following as the 8T for UPA antenna structure x , rank 3, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 4.

[0137]

[0138] An example uses the following as the 8T for UPA antenna structure x , rank 4, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 5.

[0139]

[0140] An example uses the following as the 8T for UPA antenna structure x , rank 5, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 6.

[0141]

[0142] An example uses the following as the 8T for UPA antenna structure x, rank 6, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 7.

[0143]

[0144] An example uses the following as the 8T for UPA antenna structure x , rank 7, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 8.

[0145]

[0146]

[0147] An example uses the following as the 8T for UPA antenna structure x , rank 8, starting point of UL codebook: NRDL codebook for UPA (N1=2, N2=2) XPOL layout, where mode=1, O1=O2=4, where N1O1×N2O2 (number of common phase values ​​(i2))=8×8×2=128 predecoders. In some examples, in order to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=O2=2, thereby reducing the number of predecoders to 32 predecoders. In some examples, in order to further reduce the TPMI size, the oversampling factor is reduced by O1=O2=1, thereby reducing the number of predecoders to 8 predecoders. The codebook equation for the above example is set forth in Equation 9.

[0148]

[0149] The following are used Fig.12 The eight elements (8T) of the 4×1 uniform linear array (ULA) 1204 layout illustrated in FIG. x ) Several examples of uplink codebooks. ULA 1204 includes cross-pole antenna elements (eg, antenna elements 0 and 4 have different polarizations) such that the total number of antenna elements is eight (8).

[0150] An example uses the following as the 8T for ULA antenna structure x , rank 1, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×4=64 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 16 precoders. The codebook equation for the above example is set forth in Equation 10.

[0151]

[0152] An example uses the following as an 8T for ULA antenna structure x , rank 2, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×2=32 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 8 precoders. The codebook equation for the above example is set forth in Equation 11.

[0153]

[0154] An example uses the following as the 8T for ULA antenna structure x , rank 3, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×2=32 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 8 precoders. The codebook equation for the above example is set forth in Equation 12.

[0155]

[0156] An example uses the following as the 8T for ULA antenna structure x , rank 4, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×2=32 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 8 precoders. The codebook equation for the above example is set forth in Equation 13.

[0157]

[0158] An example uses the following as the 8T for ULA antenna structure x , rank 5, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×2=32 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 8 precoders. The codebook equation for the above example is set forth in Equation 14.

[0159]

[0160] An example uses the following as the 8T for ULA antenna structure x , rank 6, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1×(number of common phase values ​​(i2))=16×2=32 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 8 precoders. The codebook equation for the above example is set forth in Equation 15.

[0161]

[0162] An example uses the following as the 8T for ULA antenna structure x, rank 7, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1 / 2×(number of common phase values ​​(i2))=8×2=16 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 4 precoders. The codebook equation for the above example is set forth in Equation 16.

[0163]

[0164] An example uses the following as the 8T for ULA antenna structure x , rank 8, starting point of UL codebook: NR DL codebook for ULA (N1=4, N2=1) XPOL layout, O1=4, where N1O1 / 2×(number of common phase values ​​(i2))=8×2=16 precoders. In some examples, to provide a precoding matrix with elements in {+1,-1,j,-j}, the oversampling factor is reduced by O1=1, thereby reducing the number of precoders to 4 precoders. The codebook equation for the above example is set forth in Equation 17.

[0165]

[0166] Fig.13 is a signaling diagram 1300 illustrating an example of signaling associated with communication of codebook related information in a wireless communication system including a network entity 1302, a first user equipment 1304, and a second user equipment 1306. In some examples, the network entity 1302 may correspond to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Fig.18 In some examples, the first user equipment 1304 and the second user equipment 1306 may correspond to any of the network entities, base stations, CUs, DUs, RUs, or scheduling entities shown in any of the examples. Figure 1 , Figure 2 , Figure 3 , Figure 5 and Fig.14 Any of the UEs or scheduled entities shown in any of the figures.

[0167] exist Fig.13 At 1308, the first user equipment 1304 transmits an indication of its antenna configuration to the network entity 1302 (eg, via a UE capability message). For example, the first user equipment 1304 may indicate that it employs 2×2 UPA or some other antenna configuration.

[0168] At 1310, the second user equipment 1306 transmits an indication of its antenna configuration to the network entity 1302 (eg, via a UE capabilities message). For example, the second user equipment 1306 may indicate that it employs 4x1 ULA or some other antenna configuration.

[0169] At 1312, the first user equipment 1304 transmits a sounding reference signal to the network entity 1302 via one or more antenna ports (e.g., via the SRS resources configured by the network entity 1302). Similarly, at 1314, the second user equipment 1306 transmits a sounding reference signal to the network entity 1302 via one or more antenna ports (e.g., via the SRS resources configured by the network entity 1302).

[0170] At 1316, the network entity 1302 estimates an uplink channel from the first user equipment 1304 to the network entity 1302 based on the sounding reference signal received at 1312. Similarly, at 1318, the network entity 1302 estimates an uplink channel from the second user equipment 1306 to the network entity 1302 based on the sounding reference signal received at 1314.

[0171] At 1318, the network entity 1302 selects a precoding matrix within the uplink codebook for uplink transmission by the first user equipment 1304. As discussed herein, the selection of the precoding matrix can be based on the antenna configuration of the first user equipment 1304 (e.g., based on the indication received at 1308). Furthermore, in some examples, the corresponding codebook can be generated based on a lower value of at least one oversampling factor compared to an oversampling factor for downlink transmission using the same antenna configuration.

[0172] The network entity 1302 also selects a precoding matrix within the uplink codebook for uplink transmission by the second user equipment 1306. The selection of the precoding matrix may be based on the antenna configuration of the second user equipment 1306 (e.g., based on the indication received at 1310). Furthermore, in some examples, the corresponding codebook may be generated based on a lower value of at least one oversampling factor compared to an oversampling factor for downlink transmission using the same antenna configuration.

[0173] At 1320, the network entity 1302 sends control signaling to the first user equipment 1304, wherein the control signaling indicates the corresponding TPMI selected at 1318 and the associated rank information for uplink transmission. For example, the network entity may send DCI 0_1 including the TPMI field to the first user equipment 1304 to schedule PDSCH transmission.

[0174] At 1322, the network entity 1302 sends control signaling to the second user equipment 1306, wherein the control signaling indicates the corresponding TPMI selected at 1318 and the associated rank information for the uplink transmission. For example, the network entity may send DCI 0_1 including the TPMI field to the second user equipment 1306 to schedule PDSCH transmission.

[0175] At 1324, the first user equipment 1304 sends a physical uplink shared channel transmission to the network entity 1302 using the TPMI and rank information received at 1320. For example, using the TPMI received at 1320, the first user equipment 1304 may identify a precoder to use for PUSCH transmission from the configured codebook.

[0176] At 1326, the second user equipment 1306 sends a physical uplink shared channel transmission to the network entity 1302 using the TPMI and rank information received at 1322. For example, using the TPMI received at 1322, the first user equipment 1304 may identify a precoder to use for PUSCH transmission from the configured codebook.

[0177] Fig.14 14 is a block diagram illustrating an example of a hardware implementation for a UE 1400 employing a processing system 1414. For example, the UE 1400 may be a device configured to communicate wirelessly with a network entity, such as Figures 1 to 13 In some implementations, UE 1400 may correspond to Figure 1 to Figure 2 , Figure 3 , Figure 8 and Fig.13 Any of the UEs or scheduled entities shown in any of the .

[0178] According to various aspects of the present disclosure, any combination of elements or any part of elements or elements can be implemented using processing system 1414. Processing system 1414 may include one or more processors 1404. Examples of processor 1404 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. In various examples, UE 1400 may be configured to perform any one or more of the functions described herein. That is, the processor 1404 as utilized in UE 1400 may be used to implement any one or more of the processes and procedures described herein.

[0179] In some examples, the processor 1404 may be implemented via a baseband or modem chip, and in other implementations, the processor 1404 may include several devices distinct from the baseband or modem chip (e.g., which in such scenarios may work together to implement the examples discussed herein). And as mentioned above, various hardware arrangements and components outside of the baseband modem processor may be used in implementations, including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.

[0180] In this example, the processing system 1414 may be implemented using a bus architecture (generally represented by bus 1402). The bus 1402 may include any number of interconnecting buses and bridges, depending on the specific application of the processing system 1414 and the overall design constraints. The bus 1402 communicatively couples various circuits including one or more processors (generally represented by processor 1404), memory 1405, and computer-readable media (generally represented by computer-readable media 1406). The bus 1402 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further. The bus interface 1408 provides an interface between the bus 1402, the transceiver 1410, and the antenna array 1420, and between the bus 1402 and the interface 1430. The transceiver 1410 provides a communication interface or component for communicating with various other devices over a wireless transmission medium. The interface 1430 provides a communication interface or component for communicating with various other devices and equipment (e.g., other devices contained in the same device as the UE 1400 or other external devices) through an internal bus or an external transmission medium (such as an Ethernet cable). Depending on the nature of the device, the interface 1430 may include a user interface (e.g., a keypad, a display, a speaker, a microphone, a joystick). Of course, such a user interface is optional and may be omitted in some examples (such as IoT devices).

[0181] The processor 1404 is responsible for managing the bus 1402 and general processing, including executing software stored on the computer-readable medium 1406. The software, when executed by the processor 1404, causes the processing system 1414 to perform the various functions described below for any particular device. The computer-readable medium 1406 and the memory 1405 can also be used to store data manipulated by the processor 1404 when executing the software. For example, the memory 1405 can store codebook information 1415 (e.g., pre-decoder) used by the processor 1404 for communication operations described herein.

[0182] One or more processors 1404 in the processing system may execute software. Software should be construed broadly to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. The software may reside on a computer readable medium 1406.

[0183] Computer readable medium 1406 can be a non-transient computer readable medium. Non-transient computer readable media include, for example, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., cards, sticks or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. Computer readable medium 1406 can reside in processing system 1414, be located outside processing system 1414, or be distributed across multiple entities including processing system 1414. Computer readable medium 1406 can be embodied in a computer program product. For example, a computer program product can include a computer readable medium in a packaging material. Those skilled in the art will recognize how to best implement the described functionality presented throughout this disclosure, depending on the specific application and the overall design constraints imposed on the overall system.

[0184] UE 1400 may be configured to perform any one or more operations described herein (e.g., as described above in conjunction with Figures 1 to 13 Described and combined as follows Figures 15 to 17 In some aspects of the present disclosure, the processor 1404 as utilized in the UE 1400 may include circuits configured for various functions.

[0185] Processor 1404 may include communication and processing circuitry 1441. Communication and processing circuitry 1441 may be configured to communicate with a network entity, such as a gNB. Communication and processing circuitry 1441 may be configured to communicate with a network entity and one or more other wireless communication devices via a common carrier shared between a cellular (e.g., Uu) interface and a sidelink (e.g., PC5) interface. Communication and processing circuitry 1441 may include one or more hardware components that provide a physical structure that performs various processes associated with wireless communication (e.g., signal reception and / or signal transmission) as described herein. Communication and processing circuitry 1441 may also include one or more hardware components that provide a physical structure that performs various processes associated with signal processing (e.g., processing received signals and / or processing signals for transmission) as described herein. In some examples, communication and processing circuitry 1441 may include two or more transmit / receive chains (e.g., one chain for communicating with a network entity and another chain for communicating with a sidelink device). The communication and processing circuit 1441 may be further configured to execute communication and processing software 1451 included on the computer-readable medium 1406 to implement one or more functions described herein.

[0186] In some implementations where communication involves receiving information, the communication and processing circuit 1441 may obtain information from a component of the UE 1400 (e.g., from a transceiver 1410 that receives information via radio frequency signaling or some other type of signaling suitable for an applicable communication medium), process (e.g., decode) the information, and output the processed information. For example, the communication and processing circuit 1441 may output the information to another component of the processor 1404, to the memory 1405, or to the bus interface 1408. In some examples, the communication and processing circuit 1441 may receive one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuit 1441 may receive information via one or more channels. In some examples, the communication and processing circuit 1441 may receive one or more of a signal, a message, SCI, feedback, other information, or any combination thereof. In some examples, the communication and processing circuit 1441 may receive information via one or more of a PSCCH, a PSSCH, a PSFCH, some other type of channel, or any combination thereof. In some examples, communication and processing circuitry 1441 may include functionality for components for receiving. In some examples, communication and processing circuitry 1441 may include functionality for components for decoding. In some examples, communication and processing circuitry 1441 and / or transceiver 1410 may include functionality for components for receiving downlink transmissions.

[0187] In some implementations where communication involves transmitting (e.g., sending) information, the communication and processing circuitry 1441 may obtain information (e.g., from another component of the processor 1404, the memory 1405, or the bus interface 1408), process (e.g., encode) the information, and output the processed information. For example, the communication and processing circuitry 1441 may output the information to the transceiver 1410 (e.g., which sends the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium). In some examples, the communication and processing circuitry 1441 may transmit one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 1441 may transmit information via one or more channels. In some examples, the communication and processing circuitry 1441 may transmit one or more of a signal, a message, feedback, other information, or any combination thereof. In some examples, the communication and processing circuitry 1441 may transmit information via one or more of a PSCCH, a PSSCH, a PSFCH, some other type of channel, or any combination thereof. In some examples, communication and processing circuitry 1441 may include functionality for components for transmitting (e.g., components for sending). In some examples, communication and processing circuitry 1441 may include functionality for components for encoding. In some examples, communication and processing circuitry 1441 and / or transceiver 1410 may include functionality for components for sending uplink transmissions.

[0188] Processor 1404 may include codebook configuration circuit 1442, which is configured to perform codebook configuration related operations as discussed herein (e.g., as described above in conjunction with Figures 8 to 13 The codebook configuration circuit 1442 may be configured to execute codebook configuration software 1452 included on the computer-readable medium 1406 to implement one or more functions described herein.

[0189] Codebook configuration circuitry 1442 may include functionality for components for sending configuration information (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook configuration circuit 1442 may send an RRC message including antenna configuration information to a network entity via a PUSCH.

[0190] The codebook configuration circuit 1442 may include functionality for components for receiving codebook information (e.g., as described above in conjunction with Figures 8 to 13 As described above, for example, the codebook configuration circuit 1442 may receive an RRC message including codebook information from a network entity via a PDSCH. As another example, the codebook configuration circuit 1442 may receive a DCI including a TPMI from a network entity via a PDCCH.

[0191] The processor 1404 may include a codebook processing circuit 1443, which is configured to perform codebook processing related operations as discussed herein (e.g., as described above in conjunction with Figures 8 to 13 The codebook processing circuit 1443 may be configured to execute the codebook processing software 1453 included on the computer-readable medium 1406 to implement one or more functions described herein.

[0192] The codebook processing circuit 1443 may include functionality for components for transmitting uplink transmissions (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook processing circuit 1443 may identify a precoder to be used for uplink transmission to a network entity from an uplink codebook, wherein the identification of the precoder is based on the TPMI received from the network entity.

[0193] The codebook processing circuit 1443 may include functionality for components for receiving downlink transmissions (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook processing circuit 1443 may receive a downlink transmission pre-coded using a downlink codebook.

[0194] Fig.15 is a flow chart illustrating an example method 1500 for user equipment according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, method 1500 (e.g., a method for wireless communication) may be performed by Fig.14 In some examples, the method 1500 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0195] At block 1502, a user equipment may receive a downlink transmission based on a first downlink codebook from a network entity, the first downlink codebook being based on a first oversampling factor. Fig.14 As shown and described in , the codebook processing circuit 1443 together with the communication and processing circuit 1441 and the transceiver 1410 may provide means for receiving a downlink transmission based on a first downlink codebook from a network entity, the first downlink codebook being based on a first oversampling factor.

[0196] At block 1504, the user equipment may send an uplink transmission based on a first uplink codebook to a network entity, the first uplink codebook being based on a first antenna configuration and a second oversampling factor that is different from the first oversampling factor. Fig.14As shown and described in , the codebook processing circuit 1443, together with the communication and processing circuit 1441 and the transceiver 1410, can provide a component for sending an uplink transmission based on a first uplink codebook to a network entity, wherein the first uplink codebook is based on a first antenna configuration and a second oversampling factor, and the second oversampling factor is different from the first oversampling factor.

[0197] In some examples, the user equipment may send a first indication of the first antenna configuration to the network entity. In some examples, the user equipment may receive a second indication of a codebook set including the first uplink codebook from the network entity, the codebook set being based on the first antenna configuration. In some examples, the first antenna configuration is an antenna configuration of the user equipment.

[0198] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of two.

[0199] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of one.

[0200] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of one.

[0201] Fig.16 is a flow chart illustrating an example method 1600 for user equipment according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, method 1600 (e.g., a method for wireless communication) may be performed by Fig.14 In some examples, the method 1600 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0202] At block 1602, the user equipment may send a first indication of a first antenna configuration associated with the user equipment to a network entity. Fig.14 As shown and described in , the codebook configuration circuit 1442, together with the communication and processing circuit 1441 and the transceiver 1410, may provide means for sending a first indication of a first antenna configuration associated with a user equipment to a network entity.

[0203] At block 1604, the user equipment may receive from the network entity a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration. Fig.14 As shown and described in , the codebook configuration circuit 1442 together with the communication and processing circuit 1441 and the transceiver 1410 may provide means for receiving a second indication of a codebook set for uplink transmission from a network entity, the codebook set being based on the first antenna configuration.

[0204] At block 1606, the user equipment may send a first uplink transmission based on a first uplink codebook of the codebook set to the network entity. Fig.14 As shown and described in , the codebook processing circuit 1443 together with the communication and processing circuit 1441 and the transceiver 1410 may provide means for sending a first uplink transmission based on a first uplink codebook set to a network entity.

[0205] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of two.

[0206] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of one.

[0207] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of one.

[0208] Fig.171 is a flow chart illustrating an example method 1700 for user equipment according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, method 1700 (e.g., a method for wireless communication) may be performed by Fig.14 In some examples, the method 1700 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0209] At block 1702, a user equipment may receive a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment. Fig.14 As shown and described in , the codebook processing circuit 1443, together with the communication and processing circuit 1441 and the transceiver 1410, can provide a component for receiving a transmit pre-decoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of a user equipment.

[0210] At block 1704, the user equipment may send an uplink transmission based on the TPMI to the network entity. In some examples, such as Fig.14 As shown and described in , the codebook processing circuit 1443 together with the communication and processing circuit 1441 and the transceiver 1410 may provide means for sending a TPMI-based uplink transmission to a network entity.

[0211] In some examples, the user equipment may send a first indication of the first antenna configuration to the network entity. In some examples, the user equipment may receive a second indication of a codebook set including the first uplink codebook from the network entity, the codebook set being based on the first antenna configuration.

[0212] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of two.

[0213] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of one.

[0214] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first oversampling factor is a value of one.

[0215] Reference again Fig.14 In one configuration, the UE 1400 includes: a component for receiving a downlink transmission based on a first downlink codebook from a network entity, the first downlink codebook being based on a first oversampling factor; and a component for sending an uplink transmission based on a first uplink codebook to the network entity, the first uplink codebook being based on a first antenna configuration and a second oversampling factor, the second oversampling factor being different from the first oversampling factor. In one configuration, the UE 1400 includes: a component for sending a first indication of a first antenna configuration associated with the user equipment to the network entity; a component for receiving a second indication of a codebook set for uplink transmission from the network entity, the codebook set being based on the first antenna configuration; and a component for sending a first uplink transmission based on the first uplink codebook of the codebook set to the network entity. In one configuration, the UE 1400 includes: a component for receiving a transmit pre-decoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment; and a component for sending an uplink transmission based on the TPMI to the network entity. In one aspect, the aforementioned components may be Fig.14 The processor 1404 shown in FIG. 1 is configured to perform the functions recited by the aforementioned components (eg, as discussed above). On the other hand, the aforementioned components may be a circuit or any device configured to perform the functions recited by the aforementioned components.

[0216] Of course, in the above examples, the circuits included in the processor 1404 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to instructions stored in the computer-readable medium 1406, or in Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig.13 and Fig.14 described in one or more of and using, for example, this article about Figures 15 to 17 Any other suitable means or components of the described methods and / or algorithms.

[0217] Fig.1818 is a conceptual diagram illustrating an example of a hardware implementation of a network entity 1800 employing a processing system 1814. In some implementations, the network entity 1800 may correspond to Figure 1 , Figure 2 , Figure 3 , Figure 8 and Fig.13 Any of the network entities, base stations, CUs, DUs, RUs or scheduling entities shown in any of the .

[0218] According to various aspects of the present disclosure, the processing system 1814 may be used to implement an element or any portion of an element or any combination of elements. The processing system may include one or more processors 1804. The processing system 1814 may be substantially connected to Fig.14 1800, including a bus interface 1808, a bus 1802, a memory 1805, a processor 1804, a computer-readable medium 1806, a transceiver 1810, and an antenna array 1820. The memory 1805 may store codebook information 1815 (e.g., a pre-decoder) used by the processor 1804 in cooperation with the transceiver 1810 for the communication operations described herein. In addition, the network entity 1800 may include an interface 1830 (e.g., a network interface) that provides a means for communicating with at least one other device within the core network and with at least one radio access network.

[0219] The network entity 1800 may be configured to perform any one or more of the operations described herein (e.g., as described above in conjunction with Figures 1 to 13 Described and combined as follows Figures 19 to 21 In some aspects of the present disclosure, the processor 1804 as utilized in the network entity 1800 may include circuits configured for various functions.

[0220] Processor 1804 may be configured to generate, schedule, and modify resource assignments or grants of time-frequency resources (e.g., a set of one or more resource elements). For example, processor 1804 may schedule time-frequency resources within multiple time division duplex (TDD) and / or frequency division duplex (FDD) subframes, time slots, and / or mini-slots to carry user data traffic and / or control information to and / or from multiple scheduled entities. Processor 1804 may be configured to schedule resources for transmission of downlink signals. Processor 1804 may be further configured to schedule resources for transmission of uplink signals.

[0221] In some aspects of the present disclosure, the processor 1804 may include a communication and processing circuit 1841. The communication and processing circuit 1841 may be configured to communicate with user equipment. The communication and processing circuit 1841 may include one or more hardware components that provide a physical structure that performs various processes related to communication (e.g., signal reception and / or signal transmission) as described herein. The communication and processing circuit 1841 may also include one or more hardware components that provide a physical structure that performs various processes related to signal processing (e.g., processing received signals and / or processing signals for transmission) as described herein. The communication and processing circuit 1841 may be further configured to execute communication and processing software 1851 included on the computer-readable medium 1806 to implement one or more functions described herein.

[0222] The communication and processing circuit 1841 may be further configured to receive an indication from the UE. For example, the indication may be included in a MAC-CE carried in a Uu PUSCH or PSCCH, or in a Uu RRC message or SL RRC message, or in a dedicated Uu PUCCH or PUSCH. The communication and processing circuit 1841 may be further configured to receive a scheduling request for an uplink grant or a sidelink grant from the UE.

[0223] In some implementations where communication involves receiving information, the communication and processing circuitry 1841 may obtain information from a component of the network entity 1800 (e.g., from a transceiver 1810 that receives information via radio frequency signaling or some other type of signaling suitable for an applicable communication medium), process (e.g., decode) the information, and output the processed information. For example, the communication and processing circuitry 1841 may output the information to another component of the processor 1804, to the memory 1805, or to the bus interface 1808. In some examples, the communication and processing circuitry 1841 may receive one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 1841 may receive information via one or more channels. In some examples, the communication and processing circuitry 1841 may include functionality for components for receiving. In some examples, the communication and processing circuitry 1841 may include functionality for components for decoding. In some examples, the communication and processing circuitry 1841 and / or the transceiver 1810 may include functionality for components for receiving uplink transmissions.

[0224] In some implementations where communication involves transmitting (e.g., sending) information, the communication and processing circuitry 1841 may obtain information (e.g., from another component of the processor 1804, the memory 1805, or the bus interface 1808), process (e.g., encode) the information, and output the processed information. For example, the communication and processing circuitry 1841 may output the information to the transceiver 1810 (e.g., which transmits the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium). In some examples, the communication and processing circuitry 1841 may transmit one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 1841 may transmit information via one or more channels. In some examples, the communication and processing circuitry 1841 may include functionality for components for transmitting (e.g., components for sending). In some examples, the communication and processing circuitry 1841 may include functionality for components for encoding. In some examples, communication and processing circuitry 1841 and / or transceiver 1810 may include functionality for components for transmitting downlink transmissions.

[0225] The processor 1804 may include a codebook configuration circuit 1842 configured to perform codebook configuration related operations as discussed herein (e.g., as described above in conjunction with Figures 8 to 13 The codebook configuration circuit 1842 may be configured to execute codebook configuration software 1852 included on the computer-readable medium 1806 to implement one or more functions described herein.

[0226] Codebook configuration circuitry 1842 may include functionality for components for receiving configuration information (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook configuration circuit 1842 may receive an RRC message including antenna configuration information from the UE via the PUSCH.

[0227] The codebook configuration circuit 1842 may include functionality for components for sending codebook information (e.g., as described above in conjunction with Figures 8 to 13 As described above, for example, the codebook configuration circuit 1842 may send an RRC message including codebook information to the UE via the PDSCH. As another example, the codebook configuration circuit 1842 may send a DCI including the TPMI to the UE via the PDCCH.

[0228] The processor 1804 may include a codebook processing circuit 1843, which is configured to perform codebook processing related operations as discussed herein (e.g., as described above in conjunction with Figures 8 to 13The codebook processing circuit 1843 may be configured to execute codebook processing software 1853 included on the computer-readable medium 1806 to implement one or more functions described herein.

[0229] The codebook processing circuit 1843 may include functionality for components for sending downlink transmissions (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook processing circuit 1843 may identify a pre-decoder to be used for downlink transmission to the UE from the downlink codebook.

[0230] The codebook processing circuit 1843 may include functionality for components for receiving uplink transmissions (e.g., as described above in conjunction with Figures 8 to 13 For example, the codebook processing circuit 1843 may receive an uplink transmission pre-coded using an uplink codebook.

[0231] In some examples, the above is combined with Fig.18 The network entity 1800 shown and described may be a decomposed base station. Fig.18 The network entity 1800 shown in the figure may include a CU and optionally one or more DU / RUs of a decomposed base station. Other DU / RUs associated with the network entity 1800 may be distributed throughout the network. In some examples, the DU / RU may correspond to a TRP associated with the network entity. In some examples, the CU and / or DU / RU of the decomposed base station (e.g., within the network entity 1800) may generate DCI (e.g., including TPMI) and provide the DCI to the user equipment, as well as receive uplink transmissions based on the TPMI from the user equipment and process the uplink transmissions.

[0232] Fig.19 is a flow chart illustrating an example method 1900 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, the method 1900 may be performed by Fig.18 In some examples, the method 1900 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0233] At block 1902, a network entity may send a downlink transmission based on a first downlink codebook to a user equipment, the first downlink codebook being based on a first oversampling factor. Fig.18As shown and described in , the codebook processing circuit 1843 together with the communication and processing circuit 1841 and the transceiver 1810 may provide means for sending a downlink transmission based on a first downlink codebook to a user equipment, the first downlink codebook being based on a first oversampling factor.

[0234] At block 1904, the network entity may receive an uplink transmission from a user equipment based on a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a second oversampling factor, the second oversampling factor being different from the first oversampling factor. Fig.18 As shown and described in , the codebook processing circuit 1843, together with the communication and processing circuit 1841 and the transceiver 1810, can provide a component for receiving an uplink transmission based on a first uplink codebook from a user equipment, wherein the first uplink codebook is based on a first antenna configuration and a second oversampling factor, which is different from the first oversampling factor.

[0235] In some examples, the network entity may receive a first indication of the first antenna configuration from the user equipment. In some examples, the network entity may identify a codebook set based on the first antenna configuration, the codebook set including the first uplink codebook. In some examples, identifying the codebook set may include generating a codebook set. In some examples, the network entity may send a second indication of the codebook set to the user equipment. In some examples, the first antenna configuration is an antenna configuration of the user equipment. In some examples, the downlink transmission is based on the antenna configuration of the network entity.

[0236] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of two.

[0237] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of one.

[0238] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first oversampling factor is a value of four. In some examples, the second oversampling factor is a value of one.

[0239] Fig. 20 is a flow chart illustrating an example method 2000 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, the method 2000 may be performed by Fig.18 In some examples, the method 2000 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0240] At block 2002, a network entity may receive, from a user equipment, a first indication of a first antenna configuration associated with the user equipment. Fig.18 As shown and described in , codebook configuration circuitry 1842, together with communication and processing circuitry 1841 and transceiver 1810, may provide means for receiving, from a user equipment, a first indication of a first antenna configuration associated with the user equipment.

[0241] At block 2004, the network entity may send a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration. Fig.18 As shown and described in , the codebook configuration circuit 1842 together with the communication and processing circuit 1841 and the transceiver 1810 may provide means for sending a second indication of a codebook set for uplink transmission to a user equipment, the codebook set being based on the first antenna configuration.

[0242] At block 2006, the network entity may receive a first uplink transmission based on a first uplink codebook set from a user equipment. In some examples, such as Fig.18 As shown and described in , the codebook processing circuit 1843 together with the communication and processing circuit 1841 and the transceiver 1810 may provide means for receiving a first uplink transmission based on a first uplink codebook of a codebook set from a user equipment.

[0243] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of two.

[0244] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of one.

[0245] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first uplink codebook is based on an oversampling factor value of one.

[0246] Fig.21 is a flow chart illustrating an example method 2100 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for all example implementations. In some examples, the method 2100 may be performed by Fig.18 In some examples, the method 2100 may be performed by any suitable device or component for performing the functions or algorithms described below.

[0247] At block 2102, a network entity may send a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment. Fig.18 As shown and described in , the codebook processing circuit 1843, together with the communication and processing circuit 1841 and the transceiver 1810, can provide a component for sending a transmit pre-decoder matrix index (TPMI) to a user equipment, wherein the TPMI is associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment.

[0248] At block 2104, the network entity may receive an uplink transmission based on the TPMI from the user equipment. In some examples, such as Fig.18As shown and described in , the codebook processing circuit 1843, together with the communication and processing circuit 1841 and the transceiver 1810, may provide means for receiving TPMI-based uplink transmissions from user equipment.

[0249] In some examples, the network entity may receive a first indication of the first antenna configuration from the user equipment. In some examples, the network entity may identify a codebook set based on the first antenna configuration, the codebook set including the first uplink codebook. In some examples, identifying the codebook set may include generating a codebook set. In some examples, the network entity may send a second indication of the codebook set to the user equipment.

[0250] In some examples, the first antenna configuration may include a uniform planar array having eight antenna elements. In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of two.

[0251] In some examples, the first antenna configuration may include a uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain. In some examples, the first oversampling factor is a value of one.

[0252] In some examples, the first antenna configuration may include a uniform linear array having eight antenna elements. In some examples, the first antenna configuration may include a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain. In some examples, the first oversampling factor is a value of one.

[0253] Reference again Fig.18In one configuration, the network entity 1800 includes: means for sending a downlink transmission based on a first downlink codebook to a user equipment, the first downlink codebook being based on a first oversampling factor; and means for receiving an uplink transmission based on a first uplink codebook from the user equipment, the first uplink codebook being based on a first antenna configuration and a second oversampling factor, the second oversampling factor being different from the first oversampling factor. In one configuration, the network entity 1800 includes: means for receiving a first indication of a first antenna configuration associated with the user equipment from the user equipment; means for sending a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration; and means for receiving a message from the user equipment based on the timing advance information. In one configuration, the network entity 1800 includes: a component for sending a transmit pre-decoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment; and a component for receiving an uplink transmission based on the TPMI from the user equipment. In one aspect, the aforementioned components may be Fig.18 The processor 1804 shown in FIG. 1 is configured to perform the functions recited by the aforementioned components (eg, as discussed above). On the other hand, the aforementioned components may be a circuit or any device configured to perform the functions recited by the aforementioned components.

[0254] Of course, in the above examples, the circuits included in the processor 1804 are provided only as examples, and other components for performing the described functions may be included in various aspects of the present disclosure, including but not limited to instructions stored in the computer-readable medium 1806, or in Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig.13 and Fig.18 described in one or more of and using, for example, this article about Figures 19 to 21 Any other suitable means or components of the described methods and / or algorithms.

[0255] Figures 15 to 17 and Figures 19 to 21 The method shown in may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein. A summary of several aspects of the disclosure is provided below.

[0256] Aspect 1: A method for wireless communication at a user equipment, the method comprising: receiving a transmit pre-decoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment; and sending an uplink transmission based on the TPMI to the network entity.

[0257] Aspect 2: The method according to aspect 1, further comprising: sending a first indication of the first antenna configuration to the network entity.

[0258] Aspect 3: The method according to aspect 2 further comprises: receiving, from the network entity, a second indication of a codebook set including the first uplink codebook, the codebook set being based on the first antenna configuration.

[0259] Aspect 4: The method according to any one of aspects 1 to 3, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

[0260] Aspect 5: A method according to any one of Aspects 1 to 4, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array includes two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first oversampling factor is a value of two.

[0261] Aspect 6: A method according to any one of Aspects 1 to 4, wherein: the first antenna configuration comprises a uniform planar array, the uniform planar array comprising two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first oversampling factor is a value of one.

[0262] Aspect 7: The method according to any one of aspects 1 to 3, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

[0263] Aspect 8: A method according to any one of Aspects 1 to 3 and 7, wherein: the first antenna configuration includes a uniform linear array, the uniform linear array includes four antenna elements in the horizontal domain and one antenna element in the vertical domain; and the first oversampling factor is a value of one.

[0264] Aspect 9: A method for wireless communication at a network entity, the method comprising: sending a transmit pre-decoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook, the first uplink codebook being based on a first antenna configuration and a first oversampling factor of the user equipment; and receiving an uplink transmission based on the TPMI from the user equipment.

[0265] Aspect 10: The method according to aspect 9, the method further comprising: receiving a first indication of the first antenna configuration from the user equipment.

[0266] Aspect 11: The method according to aspect 10, the method further comprising: identifying a codebook set based on the first antenna configuration, the codebook set including the first uplink codebook; and sending a second indication of the codebook set to the user equipment.

[0267] Aspect 12: The method according to any one of aspects 9 to 11, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

[0268] Aspect 13: A method according to any one of Aspects 9 to 12, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array includes two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first oversampling factor is a value of two.

[0269] Aspect 14: A method according to any one of Aspects 9 to 12, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array includes two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first oversampling factor is a value of one.

[0270] Aspect 15: The method according to any one of aspects 9 to 11, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

[0271] Aspect 16: A method according to any one of Aspects 9 to 11 and 15, wherein: the first antenna configuration comprises a uniform linear array, the uniform linear array comprising four antenna elements in the horizontal domain and one antenna element in the vertical domain; and the first oversampling factor is a value of one.

[0272] Aspect 17: A method for wireless communication at a user equipment, the method comprising: sending a first indication of a first antenna configuration associated with the user equipment to a network entity; receiving a second indication of a codebook set for uplink transmission from the network entity, the codebook set being based on the first antenna configuration; and sending a first uplink transmission of a first uplink codebook based on the codebook set to the network entity.

[0273] Aspect 18: The method of aspect 17, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

[0274] Aspect 19: A method according to any one of Aspects 17 to 18, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array including two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first uplink codebook is based on an oversampling factor value of two.

[0275] Aspect 20: A method according to any one of Aspects 17 to 18, wherein: the first antenna configuration comprises a uniform planar array, the uniform planar array comprising two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first uplink codebook is based on an oversampling factor value of one.

[0276] Aspect 21: The method of aspect 17, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

[0277] Aspect 22: A method according to any one of Aspects 18 and 21, wherein: the first antenna configuration includes a uniform linear array, the uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and the first uplink codebook is based on an oversampling factor value of one.

[0278] Aspect 23: The method according to any one of aspects 17 to 22, the method further comprising: sending a transmit precoder matrix index (TPMI) associated with the first uplink codebook to the user equipment.

[0279] Aspect 24: A method for wireless communication at a network entity, the method comprising: receiving a first indication of a first antenna configuration associated with the user equipment from a user equipment; sending a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration; and receiving a first uplink transmission of a first uplink codebook based on the codebook set from the user equipment.

[0280] Aspect 25: The method of aspect 24, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

[0281] Aspect 26: A method according to any one of Aspects 24 to 25, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array includes two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first uplink codebook is based on an oversampling factor value of two.

[0282] Aspect 27: A method according to any one of Aspects 24 to 25, wherein: the first antenna configuration includes a uniform planar array, the uniform planar array includes two antenna elements in the horizontal domain and two antenna elements in the vertical domain; and the first uplink codebook is based on an oversampling factor value of one.

[0283] Aspect 28: The method of aspect 24, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

[0284] Aspect 29: A method according to any one of Aspects 24 and 28, wherein: the first antenna configuration includes a uniform linear array, the uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and the first uplink codebook is based on an oversampling factor value of one.

[0285] Aspect 30: The method according to any one of aspects 24 to 29, the method further comprising: sending a transmit precoder matrix index (TPMI) associated with the first uplink codebook to the user equipment.

[0286] Aspect 31: A user equipment, comprising: a transceiver configured to communicate with a radio access network; a memory; and a processor coupled to the transceiver and the memory, wherein the processor and the memory are configured to perform any one or more of Aspects 1 to 8.

[0287] Aspect 32: An apparatus configured for wireless communication, the apparatus comprising at least one component for performing any one or more of aspects 1 to 8.

[0288] Aspect 33: A non-transitory computer-readable medium storing computer-executable code, the non-transitory computer-readable medium comprising code for causing an apparatus to perform any one or more of aspects 1 to 8.

[0289] Aspect 34: A network entity, comprising: a transceiver; a memory; and a processor, the processor being communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to perform any one or more of aspects 9 to 16.

[0290] Aspect 35: An apparatus configured for wireless communication, the apparatus comprising at least one component for performing any one or more of aspects 9 to 16.

[0291] Aspect 36: A non-transitory computer readable medium storing computer executable code, the non-transitory computer readable medium comprising code for causing an apparatus to perform any one or more of aspects 9 to 16.

[0292] Aspect 37: A user equipment, comprising: a transceiver configured to communicate with a radio access network; a memory; and a processor coupled to the transceiver and the memory, wherein the processor and the memory are configured to perform any one or more of Aspects 17 to 23.

[0293] Aspect 38: An apparatus configured for wireless communication, the apparatus comprising at least one component for performing any one or more of aspects 17 to 23.

[0294] Aspect 39: A non-transitory computer-readable medium storing computer-executable code, the non-transitory computer-readable medium comprising code for causing an apparatus to perform any one or more of aspects 17 to 23.

[0295] Aspect 40: A network entity, comprising: a transceiver; a memory; and a processor, the processor being communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to perform any one or more of aspects 24 to 30.

[0296] Aspect 41: An apparatus configured for wireless communication, the apparatus comprising at least one component for performing any one or more of aspects 24 to 30.

[0297] Aspect 42: A non-transitory computer readable medium storing computer executable code, the non-transitory computer readable medium comprising code for causing an apparatus to perform any one or more of aspects 24 to 30.

[0298] Several aspects of wireless communication networks have been presented with reference to example implementations. As those skilled in the art will readily appreciate, various aspects described throughout this disclosure may be extended to other telecommunication systems, network architectures and communication standards.

[0299] By way of example, various aspects may be implemented within other systems defined by 3GPP, such as Long Term Evolution (LTE), Evolved Packet System (EPS), Universal Mobile Telecommunications System (UMTS), and / or Global System for Mobile (GSM). Various aspects may also be extended to systems defined by the Third Generation Partnership Project 2 (3GPP2), such as CDMA2000 and / or Evolution-Data Optimized (EV-DO). Other examples may be implemented within systems employing Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth, and / or other suitable systems. The actual telecommunication standard, network architecture, and / or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.

[0300] Within the present disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration". Any specific implementation or aspect described herein as "exemplary" is not necessarily to be construed as superior or superior to other aspects of the present disclosure. Likewise, the term "aspect" does not require that all aspects of the present disclosure include the discussed features, advantages, or modes of operation. The term "coupled" is used herein to refer to a direct or indirect coupling between two objects. For example, if object A physically contacts object B, and object B contacts object C, objects A and C may still be considered to be coupled to each other, even if they are not in direct physical contact with each other. For example, a first object may be coupled to a second object, even if the first object has never been in direct physical contact with the second object. The terms "circuit" and "circuitry" are used broadly, and they are intended to include both hardware implementations of electronic devices and conductors (where these electronic devices and conductors, when connected and configured, implement the execution of the functions described in the present disclosure, without limitation on the type of electronic circuits) and software implementations of information and instructions (where these information and instructions, when executed by a processor, implement the execution of the functions described in the present disclosure). As used herein, the term "determining" may include, for example, ascertaining, solving, selecting, choosing, establishing, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database or other data structure), etc. In addition, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc.

[0301] Figures 1 to 21 One or more of the illustrated components, steps, features and / or functions may be rearranged and / or combined into a single component, step, feature or function, or may be embodied in several components, steps or functions. Additional elements, components, steps and / or functions may also be added without departing from the novel features disclosed herein. Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig.13 , Fig.14 and Fig.18 The apparatus, device and / or component illustrated in the can be configured to perform one or more of the methods, features or steps described herein. The novel algorithms described herein can also be effectively implemented in software and / or embedded in hardware.

[0302] It should be understood that the specific order or hierarchy of steps in the methods disclosed herein is illustrative of example processes. It should be understood that the specific order or hierarchy of steps in these methods can be rearranged based on design preferences. The attached method claims provide elements of various steps in an example order, but are not intended to be limited to the specific order or hierarchy provided unless explicitly stated herein.

[0303] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the various aspects shown herein, but to conform to the full scope consistent with the text of the claims, wherein unless explicitly stated otherwise, reference to an element in the singular form is not intended to mean "one and only one", but "one or more". Unless otherwise specified, the term "some" refers to one or more. A phrase referring to "at least one of" a list of items (e.g., one of or at least one of) refers to any combination of these items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a; b; c; a and b; a and c; b and c; and a, b, and c. All structural and functional equivalents currently or hereafter known to those of ordinary skill in the art throughout the elements of the various aspects described in this disclosure are expressly incorporated herein by reference, and are intended to be covered by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.

Claims

1. A method for wireless communication at a user equipment, the method comprising: receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; as well as An uplink transmission based on the TPMI is sent to the network entity.

2. The method according to claim 1, further comprising: A first indication of the first antenna configuration is sent to the network entity.

3. The method according to claim 2, further comprising: A second indication of a set of codebooks including the first uplink codebook is received from the network entity, the set of codebooks being based on the first antenna configuration.

4. The method of claim 1, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

5. The method according to claim 1, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first oversampling factor is a value of two.

6. The method according to claim 1, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first oversampling factor is a value of one.

7. The method of claim 1, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

8. The method according to claim 1, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first oversampling factor is a value of one.

9. A method for wireless communication at a network entity, the method comprising: sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; as well as An uplink transmission based on the TPMI is received from the user equipment.

10. The method according to claim 9, further comprising: A first indication of the first antenna configuration is received from the user equipment.

11. The method according to claim 10, further comprising: identifying a codebook set based on the first antenna configuration, the codebook set including the first uplink codebook; as well as A second indication of the codebook set is sent to the user equipment.

12. The method of claim 9, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

13. The method of claim 9, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first oversampling factor is a value of two.

14. The method of claim 9, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first oversampling factor is a value of one.

15. The method of claim 9, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

16. The method of claim 9, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first oversampling factor is a value of one.

17. A method for wireless communication at a user equipment, the method comprising: sending a first indication of a first antenna configuration associated with the user equipment to a network entity; receiving, from the network entity, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is sent to the network entity.

18. The method of claim 17, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

19. The method of claim 17, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of two.

20. The method of claim 17, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

21. The method of claim 17, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

22. The method of claim 17, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

23. The method according to claim 17, further comprising: A transmit precoder matrix index (TPMI) associated with the first uplink codebook is sent to the user equipment.

24. A method for wireless communication at a network entity, the method comprising: receiving, from a user equipment, a first indication of a first antenna configuration associated with the user equipment; sending, to the user equipment, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is received from the user equipment.

25. The method of claim 24, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

26. The method of claim 24, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of two.

27. The method of claim 24, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

28. The method of claim 24, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

29. The method of claim 24, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

30. The method of claim 24, further comprising: A transmit precoder matrix index (TPMI) associated with the first uplink codebook is sent to the user equipment.

31. A user equipment, the user equipment comprising: Memory; and a processor coupled to the memory, wherein the processor and the memory are configured to: receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; as well as An uplink transmission based on the TPMI is sent to the network entity.

32. The user equipment of claim 31 , wherein the processor and the memory are further configured to: A first indication of the first antenna configuration is sent to the network entity.

33. The user equipment of claim 32, wherein the processor and the memory are further configured to: A second indication of a set of codebooks including the first uplink codebook is received from the network entity, the set of codebooks being based on the first antenna configuration.

34. The user equipment of claim 31 , wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

35. The user equipment of claim 31 , wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; The first oversampling factor is a value of two.

36. The user equipment of claim 31 , wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; The first oversampling factor is a value of one.

37. The user equipment of claim 31 , wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

38. The user equipment of claim 31 , wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; The first oversampling factor is a value of one.

39. A network entity, comprising: Memory; and a processor coupled to the memory, wherein the processor and the memory are configured to: sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; as well as An uplink transmission based on the TPMI is received from the user equipment.

40. The network entity of claim 39, wherein the processor and the memory are further configured to: A first indication of the first antenna configuration is received from the user equipment.

41. The network entity of claim 40, wherein the processor and the memory are further configured to: identifying a codebook set based on the first antenna configuration, the codebook set including the first uplink codebook; and A second indication of the codebook set is sent to the user equipment.

42. The network entity of claim 39, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

43. The network entity of claim 39, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; The first oversampling factor is a value of two.

44. The network entity of claim 39, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; The first oversampling factor is a value of one.

45. The network entity of claim 39, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

46. ​​The network entity of claim 39, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; The first oversampling factor is a value of one.

47. A user equipment, the user equipment comprising: Memory; and a processor coupled to the memory, wherein the processor and the memory are configured to: sending a first indication of a first antenna configuration associated with the user equipment to a network entity; receiving, from the network entity, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is sent to the network entity.

48. The user equipment of claim 47, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

49. The user equipment of claim 47, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of two.

50. The user equipment of claim 47, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

51. The user equipment of claim 47, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

52. The user equipment of claim 47, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

53. The user equipment of claim 47, wherein the processor and the memory are further configured to: A transmit precoder matrix index (TPMI) associated with the first uplink codebook is sent to the user equipment.

54. A network entity, the network entity comprising: Memory; and a processor coupled to the memory, wherein the processor and the memory are configured to: receiving, from a user equipment, a first indication of a first antenna configuration associated with the user equipment; sending, to the user equipment, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is received from the user equipment.

55. The network entity of claim 54, wherein the first antenna configuration comprises a uniform planar array having eight antenna elements.

56. The network entity of claim 54, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of two.

57. The network entity of claim 54, wherein: The first antenna configuration comprises a uniform planar array including two antenna elements in a horizontal domain and two antenna elements in a vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

58. The network entity of claim 54, wherein the first antenna configuration comprises a uniform linear array having eight antenna elements.

59. The network entity of claim 54, wherein: The first antenna configuration comprises a uniform linear array including four antenna elements in the horizontal domain and one antenna element in the vertical domain; and The first uplink codebook is based on an oversampling factor value of one.

60. The network entity of claim 54, wherein the processor and the memory are further configured to: A transmit precoder matrix index (TPMI) associated with the first uplink codebook is sent to the user equipment.

61. A user equipment, the user equipment comprising: means for receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; and Means for sending an uplink transmission based on the TPMI to the network entity.

62. A user equipment, the user equipment comprising: means for sending a first indication of a first antenna configuration associated with the user equipment to a network entity; means for receiving, from the network entity, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; and means for sending a first uplink transmission based on a first uplink codebook of the set of codebooks to the network entity.

63. A network entity, the network entity comprising: means for sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; and Means for receiving an uplink transmission based on the TPMI from the user equipment.

64. A network entity, the network entity comprising: means for receiving, from user equipment, a first indication of a first antenna configuration associated with the user equipment; means for sending a second indication of a codebook set for uplink transmission to the user equipment, the codebook set being based on the first antenna configuration; and Means for receiving, from the user equipment, a first uplink transmission based on a first uplink codebook of the set of codebooks.

65. A non-transitory computer readable medium having stored therein instructions executable by one or more processors of user equipment to: receiving a transmit precoder matrix index (TPMI) from a network entity, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; and An uplink transmission based on the TPMI is sent to the network entity.

66. A non-transitory computer readable medium having stored therein instructions executable by one or more processors of user equipment to: sending a first indication of a first antenna configuration associated with the user equipment to a network entity; receiving, from the network entity, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is sent to the network entity.

67. A non-transitory computer readable medium having stored therein instructions executable by one or more processors of a network entity to: sending a transmit precoder matrix index (TPMI) to a user equipment, the TPMI being associated with a first uplink codebook based on a first antenna configuration and a first oversampling factor of the user equipment; and An uplink transmission based on the TPMI is received from the user equipment.

68. A non-transitory computer readable medium having stored therein instructions executable by one or more processors of a network entity to: receiving, from a user equipment, a first indication of a first antenna configuration associated with the user equipment; sending, to the user equipment, a second indication of a codebook set for uplink transmission, the codebook set being based on the first antenna configuration; as well as A first uplink transmission based on a first uplink codebook of the codebook set is received from the user equipment.

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