Receiver antenna configurations
By allowing UEs and network nodes to dynamically configure receiver antenna configurations based on capability indications, the described techniques address inefficiencies in power consumption and link budget, enhancing wireless communication system performance.
Patent Information
- Application Number
- PCT/CN2024/080047
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-09-11
AI Technical Summary
Current wireless communication systems, particularly in 5G NR, lack a configurable mechanism to balance power consumption and link budget, especially for reduced capability UEs, leading to inefficiencies in receiver antenna configurations.
UEs and network nodes can exchange antenna capability indications to dynamically configure receiver antenna configurations, enabling flexible switching and reducing power consumption while mitigating DL link budget loss at the cell edge through channel and signal scheduling.
This approach allows for flexible implementation of receiver antenna configurations, reducing power consumption and mitigating link budget loss by enabling UE-reported channel measurements and antenna switching, thereby optimizing performance in various scenarios.
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Figure CN2024080047_12092025_PF_FP_ABST
Abstract
Description
RECEIVER ANTENNA CONFIGURATIONSTECHNICAL FIELD
[0001] The present disclosure relates generally to communication systems, and more particularly, to wireless communications utilizing antenna switching.
[0002] INTRODUCTION
[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR) . 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) . Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.
[0005] BRIEF SUMMARY
[0006] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. This summary neither identifies key or critical elements of all aspects nor delineates the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
[0007] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may comprise a user equipment (UE) , and the method may be performed at / by a UE. The apparatus is configured to provide, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The apparatus is also configured to receive, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. The apparatus is also configured to receive, from the network node and via a set of antennas associated with the antenna configuration, downlink (DL) signaling.
[0008] In the aspect, the method includes providing, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The method also includes receiving, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. The method also includes receiving, from the network node and via a set of antennas associated with the antenna configuration, DL signaling.
[0009] In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus is configured to receive, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The apparatus is also configured to configure, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. The apparatus is also configured to provide, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling.
[0010] In the aspect, the method includes receiving, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The method also includes configuring, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. The method also includes providing, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling.
[0011] To the accomplishment of the foregoing and related ends, the one or more aspects may include the features hereinafter fully described and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
[0013] FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
[0014] FIG. 2B is a diagram illustrating an example of downlink (DL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0015] FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
[0016] FIG. 2D is a diagram illustrating an example of uplink (UL) channels within a subframe, in accordance with various aspects of the present disclosure.
[0017] FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
[0018] FIG. 4 is a diagram illustrating an example of reporting an antenna configuration by a UE.
[0019] FIG. 5 is a call flow diagram for wireless communications, in accordance with various aspects of the present disclosure.
[0020] FIG. 6 is a diagram illustrating an example of receiver antenna configurations, in accordance with various aspects of the present disclosure.
[0021] FIG. 7 is a diagram illustrating an example of receiver antenna configurations, in accordance with various aspects of the present disclosure.
[0022] FIG. 8 is a flowchart of a method of wireless communication, in accordance with various aspects of the present disclosure.
[0023] FIG. 9 is a flowchart of a method of wireless communication, in accordance with various aspects of the present disclosure.
[0024] FIG. 10 is a flowchart of a method of wireless communication, in accordance with various aspects of the present disclosure.
[0025] FIG. 11 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or network entity.
[0026] FIG. 12 is a diagram illustrating an example of a hardware implementation for an example network entity.DETAILED DESCRIPTION
[0027] Wireless communication networks, such as a 5G NR network, among other examples of wireless communication networks, may be designed to support communications between network nodes (e.g., base stations, gNBs, etc. ) and UEs that utilize antenna configurations. In communications for frequency division duplexed (FDD) bands, having two receiver antennas (e.g., 2Rx) may be mandated, and in communications for time division duplexed (TDD) bands, having four receiver antennas (e.g., 4Rx) may be mandated. Low-tier UEs, such as reduced capability (RedCap) UEs, may support a maximum of one receiver antenna (e.g., 1Rx) or two receiver antennas (e.g., 2Rx) for lower costs and reduced power consumption.
[0028] However, a normal UE (e.g., 2Rx / 4Rx) may be configured with its maximum capability (e.g., 2Rx or 4Rx) at all times with the exception of sounding reference signals (SRS) Tx switching for measurements. Additionally, mobile network operators (MNOs) may utilize reduced Rx configurations for power consumption gain, but this has concerns for DL link budget loss at the cell edge. Current solutions lack configurable mechanism to achieve both power consumption and link budget.
[0029] Various aspects relate generally to wireless communications utilizing antenna switching. Some aspects more specifically relate to receiver antenna configurations. In some examples, a UE may provide an antenna capability indication, indicative of UE capability (ies) associated with support of a set of antenna configurations, to a base station / gNB, and receive in response, based on the antenna capability indication, an antenna configuration indicative of one of the set of antenna configurations. The UE may then switch antenna configurations to utilize the set of antennas indicated and receive DL signaling from the base station / gNB via a set of antennas associated with the antenna configuration. In some examples, a base station / gNB receives an antenna capability indication indicative of UE capability (ies) associated with support of a set of antenna configurations from a UE. The base station / gNB then configures the UE with an antenna configuration associated with one of the set of antenna configurations based on the antenna capability indication, and provides, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling.
[0030] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, the described techniques can be used to flexibly implement Rx antenna configurations. In some examples, by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements, the described techniques can be used to reduce power consumption in some scenarios, while providing mitigation for DL link budget loss at the cell edge through Rx antenna configurations and channel / signal scheduling.
[0031] The detailed description set forth below in connection with the drawings describes various configurations and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0032] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0033] By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. When multiple processors are implemented, the multiple processors may perform the functions individually or in combination. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.
[0034] Accordingly, in one or more example aspects, implementations, and / or use cases, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, such computer-readable media can include a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
[0035] While aspects, implementations, and / or use cases are described in this application by illustration to some examples, additional or different aspects, implementations and / or use cases may come about in many different arrangements and scenarios. Aspects, implementations, and / or use cases described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, aspects, implementations, and / or use cases may come about via integrated chip implementations and other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, artificial intelligence (AI) -enabled devices, etc. ) . While some examples may or may not be specifically directed to use cases or applications, a wide assortment of applicability of described examples may occur. Aspects, implementations, and / or use cases may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more techniques herein. In some practical settings, devices incorporating described aspects and features may also include additional components and features for implementation and practice of claimed and described aspect. For example, transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders / summers, etc. ) . Techniques described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc. of varying sizes, shapes, and constitution.
[0036] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. 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) performing base station functionality, may be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB) , evolved NB (eNB) , NR BS, 5G NB, access point (AP) , a transmission reception point (TRP) , or a cell, etc. ) may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.
[0037] An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among 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 throughout one or multiple other RAN nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU and RU can be implemented as virtual units, i.e., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
[0038] Base station operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) . Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station, or disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit.
[0039] FIG. 1 is a diagram 100 illustrating an example of a wireless communications system and an access network. The illustrated wireless communications system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that can communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 125 via an E2 link, or a Non-Real Time (Non-RT) RIC 115 associated with a Service Management and Orchestration (SMO) Framework 105, or both) . A CU 110 may communicate with one or more DUs 130 via respective midhaul links, such as an F1 interface. The DUs 130 may communicate with one or more RUs 140 via respective fronthaul links. The RUs 140 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, the UE 104 may be simultaneously served by multiple RUs 140.
[0040] Each of the units, i.e., the CUs 110, the DUs 130, the RUs 140, as well as the Near-RT RICs 125, the Non-RT RICs 115, and the SMO Framework 105, may include one or more interfaces or be coupled to one or more interfaces configured to receive or to transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or to transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter, or a transceiver (such as an RF transceiver) , configured to receive or to transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0041] In some aspects, the CU 110 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 110. The CU 110 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 implementations, the CU 110 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as an E1 interface when implemented in an O-RAN configuration. The CU 110 can be implemented to communicate with the DU 130, as necessary, for network control and signaling.
[0042] The DU 130 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 140. In some aspects, the DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation, demodulation, or the like) depending, at least in part, on a functional split, such as those defined by 3GPP. In some aspects, the DU 130 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 130, or with the control functions hosted by the CU 110.
[0043] Lower-layer functionality can be implemented by one or more RUs 140. In some deployments, an RU 140, controlled by a DU 130, 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, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 140 can be implemented to handle over the air (OTA) communication with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 140 can be controlled by the corresponding DU 130. In some scenarios, this configuration can enable the DU (s) 130 and the CU 110 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0044] The SMO Framework 105 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements that may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO Framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) . Such virtualized network elements can include, but are not limited to, CUs 110, DUs 130, RUs 140 and Near-RT RICs 125. In some implementations, the SMO Framework 105 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 111, via an O1 interface. Additionally, in some implementations, the SMO Framework 105 can communicate directly with one or more RUs 140 via an O1 interface. The SMO Framework 105 also may include a Non-RT RIC 115 configured to support functionality of the SMO Framework 105.
[0045] The Non-RT RIC 115 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the Near-RT RIC 125. The Non-RT RIC 115 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 125. The Near-RT RIC 125 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 110, one or more DUs 130, or both, as well as an O-eNB, with the Near-RT RIC 125.
[0046] In some implementations, to generate AI / ML models to be deployed in the Near-RT RIC 125, the Non-RT RIC 115 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 125 and may be received at the SMO Framework 105 or the Non-RT RIC 115 from non-network data sources or from network functions. In some examples, the Non-RT RIC 115 or the Near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 115 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 105 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0047] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Accordingly, a base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component indicated with dotted lines to signify that each component may or may not be included in the base station 102) . The base station 102 provides an access point to the core network 120 for a UE 104. The base station 102 may include macrocells (high power cellular base station) and / or small cells (low power cellular base station) . The small cells include femtocells, picocells, and microcells. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) . The communication links between the RUs 140 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to an RU 140 and / or downlink (DL) (also referred to as forward link) transmissions from an RU 140 to a UE 104. The communication links may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links may be through one or more carriers. The base station 102 / UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) . The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
[0048] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) . D2D communication may be through a variety of wireless D2D communications systems, such as for example, BluetoothTM (Bluetooth is a trademark of the Bluetooth Special Interest Group (SIG) ) , Wi-FiTM (Wi-Fi is a trademark of the Wi-Fi Alliance) based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.
[0049] The wireless communications system may further include a Wi-Fi AP 150 in communication with UEs 104 (also referred to as Wi-Fi stations (STAs) ) via communication link 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the UEs 104 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
[0050] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0051] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz –71 GHz) , FR4 (71 GHz –114.25 GHz) , and FR5 (114.25 GHz –300 GHz) . Each of these higher frequency bands falls within the EHF band.
[0052] With the above aspects in mind, unless specifically stated otherwise, the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.
[0053] The base station 102 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming. The base station 102 may transmit a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also transmit a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 102 / UE 104. The transmit and receive directions for the base station 102 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.
[0054] The base station 102 may include and / or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a TRP, network node, network entity, network equipment, or some other suitable terminology. The base station 102 can be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and an RU, or as a disaggregated base station including one or more of a CU, a DU, and / or an RU. The set of base stations, which may include disaggregated base stations and / or aggregated base stations, may be referred to as next generation (NG) RAN (NG-RAN) .
[0055] The core network 120 may include an Access and Mobility Management Function (AMF) 161, a Session Management Function (SMF) 162, a User Plane Function (UPF) 163, a Unified Data Management (UDM) 164, one or more location servers 168, and other functional entities. The AMF 161 is the control node that processes the signaling between the UEs 104 and the core network 120. The AMF 161 supports registration management, connection management, mobility management, and other functions. The SMF 162 supports session management and other functions. The UPF 163 supports packet routing, packet forwarding, and other functions. The UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identification handling, access authorization, and subscription management. The one or more location servers 168 are illustrated as including a Gateway Mobile Location Center (GMLC) 165 and a Location Management Function (LMF) 166. However, generally, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, a position determination entity (PDE) , a serving mobile location center (SMLC) , a mobile positioning center (MPC) , or the like. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) for accessing UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to compute the position of the UE 104. The NG-RAN may utilize one or more positioning methods in order to determine the position of the UE 104. Positioning the UE 104 may involve signal measurements, a position estimate, and an optional velocity computation based on the measurements. The signal measurements may be made by the UE 104 and / or the base station 102 serving the UE 104. The signals measured may be based on one or more of a satellite positioning system (SPS) 170 (e.g., one or more of a Global Navigation Satellite System (GNSS) , global position system (GPS) , non-terrestrial network (NTN) , or other satellite position / location system) , LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS) , sensor-based information (e.g., barometric pressure sensor, motion sensor) , NR enhanced cell ID (NR E-CID) methods, NR signals (e.g., multi-round trip time (Multi-RTT) , DL angle-of-departure (DL-AoD) , DL time difference of arrival (DL-TDOA) , UL time difference of arrival (UL-TDOA) , and UL angle-of-arrival (UL-AoA) positioning) , and / or other systems / signals / sensors.
[0056] Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) . The UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices such as in a device constellation arrangement. One or more of these devices may collectively access the network and / or individually access the network.
[0057] Referring again to FIG. 1, in certain aspects, the UE 104 may have a receiver antenna configuration component 198 ( “component 198” ) that may be configured to provide, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The component 198 may also be configured to receive, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. The component 198 may also be configured to receive, from the network node and via a set of antennas associated with the antenna configuration, DL signaling. The component 198 may be configured to switch the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations. In certain aspects, the base station 102 may have a receiver antenna configuration component 199 ( “component 199” ) that may be configured to receive, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The component 199 may also be configured to configure, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. The component 199 may also be configured to provide, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling. Accordingly, aspects herein for receiver antenna configurations provide for flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0058] FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 being configured with slot format 1 (with all UL) . While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically / statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) . Note that the description infra applies also to a 5G NR frame structure that is TDD.
[0059] FIGs. 2A-2D illustrate a frame structure, and the aspects of the present disclosure may be applicable to other wireless communication technologies, which may have a different frame structure and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms) . Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For normal CP, each slot may include 14 symbols, and for extended CP, each slot may include 12 symbols. The symbols on DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (for power limited scenarios; limited to a single stream transmission) . The number of slots within a subframe is based on the CP and the numerology. The numerology defines the subcarrier spacing (SCS) (see Table 1) . The symbol length / duration may scale with 1 / SCS.
[0060] Table 1: Numerology, SCS, and CP
[0061] For normal CP (14 symbols / slot) , different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For extended CP, the numerology 2 allows for 4 slots per subframe. Accordingly, for normal CP and numerology μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing may be equal to 2μ*15 kHz, where μ is the numerology 0 to 4. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of normal CP with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see FIG. 2B) that are frequency division multiplexed. Each BWP may have a particular numerology and CP (normal or extended) .
[0062] A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
[0063] As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE.The RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
[0064] FIG. 2B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs) , each CCE including six RE groups (REGs) , each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within one BWP may be referred to as a control resource set (CORESET) . A UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe / symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the DM-RS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as SS block (SSB) ) . The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
[0065] As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) . The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS) . The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
[0066] FIG. 2D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACK and / or negative ACK (NACK) ) . The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and / or UCI.
[0067] FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, Internet protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0068] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.
[0069] At the UE 350, each receiver 354Rx receives a signal through its respective antenna 352. Each receiver 354Rx recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.
[0070] The controller / processor 359 can be associated with at least one memory 360 that stores program codes and data. The at least one memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0071] Similar to the functionality described in connection with the DL transmission by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0072] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a respective spatial stream for transmission.
[0073] The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318Rx receives a signal through its respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
[0074] The controller / processor 375 can be associated with at least one memory 376 that stores program codes and data. The at least one memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0075] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform aspects in connection with the component 198 of FIG. 1.
[0076] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform aspects in connection with the component 199 of FIG. 1.
[0077] Communications between network nodes (e.g., base stations, gNBs, etc. ) and UEs may utilize antenna configurations. In communications for FDD bands, having two receiver antennas (e.g., 2Rx) may be mandated, and in communications for TDD bands, having four receiver antennas (e.g., 4Rx) may be mandated. Low-tier UEs, such as RedCap UEs, may support a maximum of one receiver antenna (e.g., 1Rx) or two receiver antennas (e.g., 2Rx) for lower costs and reduced power consumption. However, a normal UE (e.g., 2Rx / 4Rx) may be configured with its maximum capability (e.g., 2Rx or 4Rx) at all times with the exception of SRS Tx switching for measurements. Additionally, mobile network operators (MNOs) may utilize reduced Rx configurations for power consumption gain, but this has concerns for DL link budget loss at the cell edge. Current solutions lack configurable mechanisms to achieve both power consumption and link budget.
[0078] FIG. 4 is a diagram 400 illustrating an example of reporting an antenna configuration by a UE. Diagram 400 is shown in the context of UEs reporting respective antenna configurations to a base station / gNB. As noted herein, current UEs may be configured with their maximum Rx antenna capability (e.g., 2Rx or 4Rx) at all times with the exception of sounding reference signals (SRS) Tx switching for measurements.
[0079] In one example, a UE 402 includes four instances of an Rx antenna 414, and thus has a maximum Rx antenna capability 408 of ‘4 Rx’ . The UE 402 thus reports the maximum Rx antenna capability 408 ( ‘4 Rx’ ) to a base station 416 for communications and scheduling. In another example, a UE 404 includes two instances of the Rx antenna 414, and thus has a maximum Rx antenna capability 410 of ‘2 Rx’ . The UE 404 thus reports the maximum Rx antenna capability 410 ( ‘2 Rx’ ) to the base station 416 for communications and scheduling. In yet another example, a UE 406 includes one instance of the Rx antenna 414, e.g., a single Rx antenna, and thus has a maximum Rx antenna capability 412 of ‘1 Rx’ . The UE 406 thus reports the maximum Rx antenna capability 412 ( ‘1 Rx’ ) to the base station 416 for communications and scheduling.
[0080] However, the reduced Rx configurations for power consumption gain in UEs with a lower maximum Rx antenna capability results in DL link budget loss at the cell edge, and while DL link budget loss at the cell edge is mitigated for UEs with a higher maximum Rx antenna capability, the power consumption for additional antennas being configured is still realized in scenarios where fewer antennas would be acceptable for performance / quality of operations.
[0081] Aspects enable tradeoffs between coverage (DL) and UE power saving, the proposal is to allow a UE to switch between more or less RX antennas. The UE may report the capability and gNB may configure depending on a certain need. Aspects provide for a UE to report its capability (ies) for Rx antenna configurations and for Rx antenna switching configurations. Based on a UE-reported channel measurement (s) , the network (e.g., a base station / gNB) may configure different numbers of Rx antennas, and configure / schedules corresponding PDSCH (e.g., MIMO layers) , DL RSs, and other related Tx / Rx parameters. Accordingly, aspects herein for receiver antenna configurations provide for a flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0082] FIG. 5 is a call flow diagram 500 for wireless communications, in various aspects. Call flow diagram 500 illustrates receiver antenna configurations for a wireless device (a UE 502, by way of example) that communicates with the network node (a base station 504, such as a gNB or other type of base station, by way of example, as shown) , in various aspects. Aspects described for the base station 504 may be performed by the base station in aggregated form and / or by one or more components of the base station in disaggregated form. Additionally, or alternatively, the aspects may be performed by the UE 502 autonomously, in addition to, and / or in lieu of, operations of the base station 504.
[0083] In the illustrated aspect, the UE 502 may be configured to transmit / provide, and the base station 504 may be configured to receive, an antenna capability indication 506. That is, the UE 502 may be configured to provide, for a network node (e.g., the base station 504) , the antenna capability indication 506 that is indicative of at least one UE 502 capability associated with support of a set of antenna configurations. The at least one UE 502 capability indicated by the antenna capability indication 506 may be associated with support of a set of antenna switching configurations via a set of information parameters or a set of default parameters. As used herein, the term ‘associated with’ may be used synonymously with ‘based on’ / ‘corresponding to’ unless expressly stated otherwise.
[0084] In aspects, the set of antenna configurations may be indicative of at least one of a two-antenna configuration (2 Rx) or a four-antenna configuration (4 Rx) via a set of information parameters or a default parameter (s) . For instance, the antenna capability indication 506 signaling may include an Rx number ‘Rx_number’ parameter with associated Rx antenna number values or default values and / or a switching combination ‘switching_combination’ parameter with associated antenna switching configuration values or default values.
[0085] In an example for the UE 502 with 4 Rx capability, the information parameters may be: {Rx number: 1R, 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a first band ‘X’ . That is, the Rx number may have a value (s) 1 Rx, 2 Rx, and / or 4 Rx as an information parameter values, in aspects, and the set of antenna switching configurations may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0086] In an example for a low-tier UE (e.g., with 1 Rx capability) , the UE 502 may report additional Rx antenna capability, and the information parameters may be: {Rx number: 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a second band ‘Y’. That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx with 2 Rx and 4 Rx capabilities reported, in aspects, and the set of antenna switching configurations may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0087] Default parameters may include null parameters / values, zeros ( ‘0’ ) , and / or any other specified parameters and associated values. In aspects, the UE 502 may be configured, by default, to support the Rx number (s) which is less than 4 Rx (e.g., when the UE 502 has 4 Rx capability) and a corresponding switching combination if not indicated. In aspects, the UE 502 (e.g., when the UE 502 has 1 Rx capability) may be configured, by default, to support a corresponding switching combination per Rx number that the UE 502 indicates as being supported. In such aspects, signaling overhead may be reduced. Accordingly, the antenna capability indication 506 may be indicative of a default support of UE 502 for a single-antenna configuration (1 Rx) or a four-antenna configuration (4 Rx) . In aspects, the antenna capability indication 506 may include per-band capabilities, such as for TDD bands and / or FDD bands.
[0088] The UE 502 may be configured to generate and transmit / provide, and the base station 504 may be configured to receive, a channel measurement (s) 507. In one example, the UE 502 may be configured to measure / generate the channel measurement (s) 507 of a PDSCH via DL signaling from the base station 504. The UE 502 may be configured to provide the channel measurement (s) 507 to the base station 504 for determinations of antenna configurations to optimize power consumption, DL link budget, etc., in various signaling scenarios for the UE 502. Aspects also provide for multiple instances of generation / provision of the channel measurement (s) 507 to the base station 504 by the UE 502.
[0089] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide (e.g., to configure) , an antenna configuration 508. That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and based on the antenna capability indication 506, the antenna configuration 508 that is indicative of one of the set of antenna configurations. For instance, the antenna capability indication 506 may indicate the set of antenna configurations (e.g., the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, as noted above) , and the antenna configuration 508 may indicate one such antenna configuration for the UE 502. In aspects, the antenna configuration 508 may be transmitted / provided by the base station 504, and received by the UE 502, in an information element (IE) in RRC signaling, a medium access control (MAC) control element (MAC-CE) , and / or DCI.
[0090] In aspects, the antenna configuration 508 may be transmitted / provided by the base station 504 based at least in part on the channel measurement (s) 507 reported by the UE 502. That is, based on different channel conditions experienced by the UE 502, different Rx antenna configurations may be more beneficial for power consumption, DL link budget, etc., and the base station 504 may advantageously configure the Rx antennas of the UE 502 accordingly.
[0091] The antenna configuration 508 may indicate one of the set of antenna configurations, and the UE 502 may be configured to switch (at 510) the UE 502 to utilize the set of antennas based on the antenna configuration 508 indicating the one of the set of antenna configurations. For example, the UE 502 may be configured to switch (at 510) from a current antenna configuration (e.g., 1 Rx, 2 Rx, and / or 4 Rx, as indicated in the antenna capability indication 506) to the antenna configuration indicated in the antenna configuration 508 by the base station 504. As noted herein, switching combinations may include 1R_4R, 1R_2R, 2R_4R, thus, the switch (at 510) may include switching from 1 Rx antenna to 4 Rx antennas, from 1 Rx antenna to 2 Rx antennas, or from 2 Rx antennas to 4 Rx antennas.
[0092] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide, DL signaling 512. That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and via a set of antennas associated with the antenna configuration 508, the DL signaling 512. The DL signaling 512 may include a PDSCH, DL RSs (e.g., CSI-RS, etc. ) , configurations and / or scheduling therefor PDSCH (e.g., for MIMO layers associated with the PDSCH) , additional Tx / Rx parameters or sets thereof, and / or the like.
[0093] In aspects, receiving, by the UE 502 via the set of antennas associated with the antenna configuration 508, the DL signaling 512 may include receiving a parameter configuration that is indicative of a set of transmission parameters and / or a set of reception parameters associated with the antenna configuration 508, where the parameter configuration is based on the antenna configuration 508, and / or may include receiving a scheduling indication associated with the DL signaling 512, where the scheduling indication is indicative of a PDSCH or a DL reference signal. In such aspects, the UE 502 may be configured to identify an error case for the PDSCH and / or the DL reference signal based on a port indication of more than one port associated with the parameter configuration and / or the scheduling indication associated with the DL signaling 512 for a single antenna configuration. Additionally, or alternatively, the UE 502 may be configured to remove or drop the PDSCH and / or the DL reference signal based on a conflict detection associated with the parameter configuration and / or the scheduling indication associated with the DL signaling 512.
[0094] Accordingly, flexibly implementing supported options for Rx antenna configurations, as configured by the base station 504 for targeted DL signaling scenarios, aspects enable the UE 502 reporting of its supported receiver antenna configurations and its supported antenna switching configurations (e.g., for numbers of Rx antennas and Rx switching) , as well as UE-reported channel measurements, to reduce power consumption in some signaling scenarios, while providing mitigation for DL link budget loss at the cell edge through Rx antenna configurations and channel / signal scheduling in other signaling scenarios.
[0095] FIG. 6 is a diagram 600 illustrating an example of receiver antenna configurations, in various aspects. Diagram 600 may be an aspect of call flow diagram 500 in FIG. 5, and is shown in the context of a UE 602 that provides an antenna capability indication 622 to a base station 604.
[0096] The UE 602 may be configured with, and / or to support, a number or set of instances of an Rx antenna 624. Rx antennas illustrated in the diagram 600 may be instances of the Rx antenna 624. In one example, the UE 602 may support an antenna configuration 606 for a first set of antennas that includes four Rx antennas (e.g., 4 Rx capability / support) . In another example, the UE 602 may support an antenna configuration 608 for a second set of antennas that includes 2 Rx antennas (e.g., 2 Rx capability / support) . In still another example, the UE 602 may support an antenna configuration 610 for a third set of antennas that includes a single or one Rx antenna (e.g., 1 Rx capability / support) . The antenna configuration 606, the antenna configuration 608, and / or the antenna configuration 610 may be a portion of and / or may comprise a set of antenna configurations 618 (e.g., 1 Rx, 2 Rx, 4 Rx, alone or in any combination; the Rx number: 1R, 2R, 4R) , which may be information parameters 626 (rather than default parameters) .
[0097] The antenna configurations illustrated are provided and described by way of example, and while shown in certain groupings / aggregations, which Rx antenna is included in a given Rx antenna configuration / set may be determined / implemented by the UE 602.
[0098] The UE 602 may be configured to support a number of or a set of antenna switching configurations 620. The set of antenna switching configurations 620 may include switching configurations associated with Rx antenna switches between the antenna configuration 606, the antenna configuration 608, and / or the antenna configuration 610, as described herein (e.g., the switching combination: 1R_4R, 1R_2R, 2R_4R) , which may be information parameters 626 (rather than default parameters) . In one example, the UE 502 may be configured to support an antenna switching configuration 612 between the antenna configuration 610 (1 Rx) and the antenna configuration 606 (4 Rx) . In another example, the UE 502 may be configured to support an antenna switching configuration 614 between the antenna configuration 610 (1 Rx) and the antenna configuration 608 (2 Rx) . In still another example, the UE 502 may be configured to support an antenna switching configuration 616 between the antenna configuration 606 (2 Rx) and the antenna configuration 606 (4 Rx) . The antenna switching configuration 612, the antenna switching configuration 614, and / or antenna switching configuration 616 may be a portion of and / or may comprise the set of antenna switching configurations 620 e.g., 1 Rx to 4 Rx, 1 Rx to 2 Rx, 2 Rx to 4 Rx, alone or in any combination; the switching combination: 1R_4R, 1R_2R, 2R_4R) .
[0099] In aspects, the set of antenna configurations 618 and / or the set of antenna switching configurations 620 may be included in the antenna capability indication 622 provided by the UE 602 to the base station 604. The antenna capability indication 622 may include per-band capabilities, such as for TDD bands and / or FDD bands, in aspects. As described above, an antenna capability indication (e.g., the antenna capability indication 622) may include default parameters 628, which may be null parameters / values, zeros ( ‘0’ ) , and / or any other specified parameters and associated values. As an example, the antenna capability indication 622, with respect to the set of antenna configurations 618 and / or the set of antenna switching configurations 620, may indicate {618, 620} , {null, 620} , {618, null} , or {null, null} . Aspects also include default parameters 628 or null parameters / values within the set of antenna configurations 618 (e.g., {null, 2R, 4R} (2 Rx, 4 Rx) for a 1 Rx UE on a band Y or {null, 2R, null} , etc. ) and / or the set of antenna switching configurations 620 (e.g., {null, null, null} or {, , } , {null, null, 2R_4R} , etc. ) .
[0100] FIG. 7 is a diagram 700 illustrating an example of receiver antenna configurations, in various aspects. Diagram 700 may be an aspect of call flow diagram 500 in FIG. 5 and / or diagram 600 in FIG. 6, and is shown in the context of a UE 702 that communicates with a base station 704 for reception of an antenna configuration 706 (in a configuration 750) and DL signaling 720 (in a configuration 760 and a configuration 770) .
[0101] In the configuration 750, the UE 702 may be configured to receive, and the base station 704 may be configured to transmit / provide, the antenna configuration 706, e.g., as similarly described above for the antenna configuration 508 in FIG. 5. In the illustrated aspect for the configuration 750, the antenna configuration 706 may be provided and received in an information element (IE) 710 in RRC signaling 708 (e.g., via configuration) , in a medium access control (MAC) control element (MAC-CE) 712, and / or in DCI 716. The IE 710 in the RRC signaling 708 may include the Rx number (e.g., Rx number: 1R, 2R, 4R) , and may include an express / implied indication of the Rx number being specific for the UE 702 and / or per-band (e.g., TDD or FDD) . The MAC-CE 712 may include information 714. The information 714 may include the Rx number (e.g., Rx number: 1R, 2R, 4R) , and may include a DL carrier activation. The DCI 716 may include a port scheduling, which may be an implicit antenna configuration for the UE 702, that indicates 1 port or 2 ports associated with the DL signaling and the Rx antennas of the UE 702.
[0102] In the configuration 760, the UE 702 may be configured to receive, and the base station 704 may be configured to transmit / provide, the DL signaling 720, e.g., as similarly described above for the DL signaling 512 in FIG. 5. In the illustrated aspect for the configuration 760, the DL signaling 720 may include a parameter configuration 722 and / or a scheduling indication 726. The parameter configuration 722 may include parameters 724, such as a set of Tx parameters and / or a set of Rx parameters. The scheduling indication 726 may include a scheduling type indication 728, such as a PDSCH scheduling indication, a DL RS scheduling indication, and / or the like.
[0103] In the configuration 770, the UE 702 may be configured to receive, and the base station 704 may be configured to transmit / provide, the DL signaling 720, e.g., as similarly described above for the DL signaling 512 in FIG. 5. The DL signaling may include the parameter configuration 722 and / or the scheduling indication 726, as described for the configuration 760 above.
[0104] In aspects, if the network (e.g., the base station 504) configures the UE 702 for 1 Rx, the UE 702 may not expect more than 1 port to be configured for a PDSCH or a CSI-RS (and other RS types) for a given band. The UE 702 may be configured to identify the number of configured ports from the parameter configuration 722, and if 1 Rx is configured with 2 ports, the UE 702 may be configured to identify this as an error case. That is, the UE 702 may be configured to identify (at 730) an error case for the PDSCH and / or the DL reference signal based on a port indication of more than one port associated with the parameter configuration 722 and / or the scheduling indication 726 associated with the DL signaling 720 for a single antenna configuration.
[0105] In aspects, UE 702 may be configured to check the parameter configuration 722 and / or the scheduling indication 726 / configuration for conflicts. If the UE 702 identifies a conflict associated with the parameter configuration 722 and / or the scheduling indication 726, the UE may be configured to drop / remove (at 732) the downlink reception or measurement (s) . That is, the UE 702 may be configured to remove (at 732) (e.g., drop) the PDSCH and / or the DL reference signal based on a conflict detection associated with the parameter configuration 722 and / or the scheduling indication 726 associated with the DL signaling 720.
[0106] Example flowcharts will now be described.
[0107] Aspects described for FIGs. 4-7 are provided as illustrative examples, and are not intended to me mutually exclusive of each other. Such aspects may be combined or used in conjunction with others of such aspects in any way and without limitation. Additionally, the flowcharts described below for FIGs. 8, 9, 10, may be performed in conjunction with one or more aspects described above for the call flow diagram in FIGs 5, and diagrams in FIGs. 6, 7, and vice versa.
[0108] FIG. 8 is a flowchart 800 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, 502, 602, 702; the apparatus 1104) . In some aspects, the method may include aspects described in connection with the communication flow in FIG. 5, and / or aspects described in FIGs. 6, 7, 8. The method may be for receiver antenna configurations. The method may provide for flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0109] At 802, the UE provides, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. As an example, the transmission / provision may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) transmitting / providing such a capability indication for a network node (e.g., the base station 504) .
[0110] The UE 502 may be configured to transmit / provide, and the base station 504 may be configured to receive, an antenna capability indication 506 (e.g., 622 in FIG. 6) . That is, the UE 502 may be configured to provide, for a network node (e.g., the base station 504) , the antenna capability indication 506 (e.g., 622 in FIG. 6) that is indicative of at least one UE 502 capability associated with support of a set of antenna configurations (e.g., 618 in FIG. 6) . The at least one capability of the UE 502 indicated by the antenna capability indication 506 (e.g., 622 in FIG. 6) may be associated with support of a set of antenna switching configurations (e.g., 620 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) .
[0111] In aspects, the set of antenna configurations (e.g., 618 in FIG. 6) may be indicative of at least one of a two-antenna configuration (2 Rx) (e.g., 608 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) signaling may include an Rx number ‘Rx_number’ parameter with associated Rx antenna number values or default values and / or a switching combination ‘switching_combination’ parameter with associated antenna switching configuration (e.g., 612, 614, 616 in FIG. 6) values or default values.
[0112] In an example for the UE 502 with 4 Rx capability, the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 1R, 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a first band ‘X’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0113] In an example for a low-tier UE (e.g., with 1 Rx capability) , the UE 502 may report additional Rx antenna capability, and the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a second band ‘Y’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx with 2 Rx and 4 Rx capabilities reported, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0114] Default parameters (e.g., 628 in FIG. 6) may be null parameters, zeros ( ‘0’ ) , and / or any other specified parameters and associated values. In aspects, the UE 502 may be configured, by default, to support the Rx number (s) which is less than 4 Rx (e.g., 606 in FIG. 6) (e.g., when the UE 502 has 4 Rx capability) and a corresponding switching combination if not indicated. In aspects, the UE 502 (e.g., when the UE 502 has 1 Rx capability) may be configured, by default, to support a corresponding switching combination per Rx number that the UE 502 indicates as being supported. In such aspects, signaling overhead may be reduced. Accordingly, the antenna capability indication 506 (e.g., 622 in FIG. 6) may be indicative of a default support of UE 502 for a single-antenna configuration (1 Rx) (e.g., 610 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) . In aspects, the antenna capability indication 506 (e.g., 622 in FIG. 6) may include per-band capabilities, such as for TDD bands and / or FDD bands.
[0115] The UE 502 may be configured to generate and transmit / provide, and the base station 504 may be configured to receive, a channel measurement (s) 507. In one example, the UE 502 may be configured to measure / generate the channel measurement (s) 507 of a PDSCH via DL signaling from the base station 504. The UE 502 may be configured to provide the channel measurement (s) 507 to the base station 504 for determinations of antenna configurations to optimize power consumption, DL link budget, etc., in various signaling scenarios for the UE 502. Aspects also provide for multiple instances of generation / provision of the channel measurement (s) 507 to the base station 504 by the UE 502.
[0116] At 804, the UE receives, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. As an example, the reception may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) receiving such an antenna configuration from a network node (e.g., the base station 504) .
[0117] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide (e.g., to configure) , an antenna configuration 508 (e.g., 706 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and based on the antenna capability indication 506 (e.g., 622 in FIG. 6) , the antenna configuration 508 (e.g., 706 in FIG. 7) that is indicative of one of the set of antenna configurations (e.g., 618 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) may indicate the set of antenna configurations (e.g., 618 in FIG. 6) (e.g., the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, as noted above) , and the antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one such antenna configuration for the UE 502. In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504, and received by the UE 502, in an information element (IE) in RRC signaling, a medium access control (MAC) control element (MAC-CE) , and / or DCI.
[0118] In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504 based at least in part on the channel measurement (s) 507 reported by the UE 502. That is, based on different channel conditions experienced by the UE 502, different Rx antenna configurations (e.g., 606, 608, 610 in FIG. 6) may be more beneficial for power consumption, DL link budget, etc., and the base station 504 may advantageously configure the Rx antennas of the UE 502 accordingly.
[0119] The antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one of the set of antenna configurations (e.g., 618 in FIG. 6) , and the UE 502 may be configured to switch (at 510) the UE 502 to utilize the set of antennas based on the antenna configuration 508 (e.g., 706 in FIG. 7) indicating the one of the set of antenna configurations (e.g., 618 in FIG. 6) . For example, the UE 502 may be configured to switch (at 510) from a current antenna configuration (e.g., 1 Rx, 2 Rx, and / or 4 Rx, as indicated in the antenna capability indication 506 (e.g., 622 in FIG. 6) ) to the antenna configuration indicated in the antenna configuration 508 (e.g., 706 in FIG. 7) by the base station 504. As noted herein, switching combinations may include 1R_4R, 1R_2R, 2R_4R, thus, the switch (at 510) may include switching from 1 Rx antenna to 4 Rx antennas (e.g., 612 in FIG. 6) , from 1 Rx antenna to 2 Rx antennas (e.g., 614 in FIG. 6) , or from 2 Rx antennas to 4 Rx antennas (e.g., 616 in FIG. 6) .
[0120] At 806, the UE receives, from the network node and via a set of antennas associated with the antenna configuration, DL signaling. As an example, the reception may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) receiving such DL signaling from a network node (e.g., the base station 504) .
[0121] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide, DL signaling 512 (e.g., 720 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and via a set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) . The DL signaling 512 (e.g., 720 in FIG. 7) may include a PDSCH, DL RSs (e.g., CSI-RS, etc. ) , configurations and / or scheduling therefor (e.g., 722, 724, 726, 728 in FIG. 7) (e.g., for MIMO layers associated with the PDSCH) , additional Tx / Rx parameters or sets thereof, and / or the like.
[0122] In aspects, receiving, by the UE 502 via the set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) may include receiving a parameter configuration (e.g., 722 in FIG. 7) that is indicative of a set of transmission parameters and / or a set of reception parameters (e.g., 724 in FIG. 7) associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , where the parameter configuration (e.g., 722 in FIG. 7) is based on the antenna configuration 508 (e.g., 706 in FIG. 7) , and / or may include receiving a scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) , where the scheduling indication (e.g., 726 in FIG. 7) is indicative of a PDSCH or a DL reference signal (e.g., 728 in FIG. 7) . In such aspects, the UE 502 may be configured to identify (e.g., at 730 in FIG. 7) an error case for the PDSCH and / or the DL reference signal based on a port indication (e.g., 718 in FIG. 7) of more than one port associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) for a single antenna configuration (e.g., 1 Rx (e.g., 610 in FIG. 6) ) . Additionally, or alternatively, the UE 502 may be configured to remove (e.g., at 732) or drop the PDSCH and / or the DL reference signal based on a conflict detection associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) .
[0123] Accordingly, flexibly implementing supported options for Rx antenna configurations, as configured by the base station 504 for targeted DL signaling scenarios, aspects enable the UE 502 reporting of its supported receiver antenna configurations and its supported antenna switching configurations (e.g., for numbers of Rx antennas and Rx switching) , as well as UE-reported channel measurements, to reduce power consumption in some signaling scenarios, while providing mitigation for DL link budget loss at the cell edge through Rx antenna configurations and channel / signal scheduling in other signaling scenarios.
[0124] FIG. 9 is a flowchart 900 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, 502, 602, 702; the apparatus 1104) . In some aspects, the method may include aspects described in connection with the communication flow in FIG. 5, and / or aspects described in FIGs. 6, 7, 8. The method may be for receiver antenna configurations. The method may provide for flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0125] At 902, the UE provides, for a network node, an antenna capability indication that is indicative of at least one capability of the UE 502 associated with support of a set of antenna configurations. As an example, the transmission / provision may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) transmitting / providing such a capability indication for a network node (e.g., the base station 504) .
[0126] The UE 502 may be configured to transmit / provide, and the base station 504 may be configured to receive, an antenna capability indication 506 (e.g., 622 in FIG. 6) . That is, the UE 502 may be configured to provide, for a network node (e.g., the base station 504) , the antenna capability indication 506 (e.g., 622 in FIG. 6) that is indicative of at least one capability of the UE 502 associated with support of a set of antenna configurations (e.g., 618 in FIG. 6) . The at least one capability of the UE 502 indicated by the antenna capability indication 506 (e.g., 622 in FIG. 6) may be associated with support of a set of antenna switching configurations (e.g., 620 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) .
[0127] In aspects, the set of antenna configurations (e.g., 618 in FIG. 6) may be indicative of at least one of a two-antenna configuration (2 Rx) (e.g., 608 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) signaling may include an Rx number ‘Rx_number’ parameter with associated Rx antenna number values or default values and / or a switching combination ‘switching_combination’ parameter with associated antenna switching configuration (e.g., 612, 614, 616 in FIG. 6) values or default values.
[0128] In an example for the UE 502 with 4 Rx capability, the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 1R, 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a first band ‘X’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0129] In an example for a low-tier UE (e.g., with 1 Rx capability) , the UE 502 may report additional Rx antenna capability, and the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a second band ‘Y’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx with 2 Rx and 4 Rx capabilities reported, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0130] Default parameters (e.g., 628 in FIG. 6) may be null parameters, zeros ( ‘0’ ) , and / or any other specified parameters and associated values. In aspects, the UE 502 may be configured, by default, to support the Rx number (s) which is less than 4 Rx (e.g., 606 in FIG. 6) (e.g., when the UE 502 has 4 Rx capability) and a corresponding switching combination if not indicated. In aspects, the UE 502 (e.g., when the UE 502 has 1 Rx capability) may be configured, by default, to support a corresponding switching combination per Rx number that the UE 502 indicates as being supported. In such aspects, signaling overhead may be reduced. Accordingly, the antenna capability indication 506 (e.g., 622 in FIG. 6) may be indicative of a default support of UE 502 for a single-antenna configuration (1 Rx) (e.g., 610 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) . In aspects, the antenna capability indication 506 (e.g., 622 in FIG. 6) may include per-band capabilities, such as for TDD bands and / or FDD bands.
[0131] The UE 502 may be configured to generate and transmit / provide, and the base station 504 may be configured to receive, a channel measurement (s) 507. In one example, the UE 502 may be configured to measure / generate the channel measurement (s) 507 of a PDSCH via DL signaling from the base station 504. The UE 502 may be configured to provide the channel measurement (s) 507 to the base station 504 for determinations of antenna configurations to optimize power consumption, DL link budget, etc., in various signaling scenarios for the UE 502. Aspects also provide for multiple instances of generation / provision of the channel measurement (s) 507 to the base station 504 by the UE 502.
[0132] At 904, the UE receives, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. As an example, the reception may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) receiving such an antenna configuration from a network node (e.g., the base station 504) .
[0133] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide (e.g., to configure) , an antenna configuration 508 (e.g., 706 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and based on the antenna capability indication 506 (e.g., 622 in FIG. 6) , the antenna configuration 508 (e.g., 706 in FIG. 7) that is indicative of one of the set of antenna configurations (e.g., 618 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) may indicate the set of antenna configurations (e.g., 618 in FIG. 6) (e.g., the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, as noted above) , and the antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one such antenna configuration for the UE 502. In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504, and received by the UE 502, in an information element (IE) in RRC signaling, a medium access control (MAC) control element (MAC-CE) , and / or DCI.
[0134] In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504 based at least in part on the channel measurement (s) 507 reported by the UE 502. That is, based on different channel conditions experienced by the UE 502, different Rx antenna configurations (e.g., 606, 608, 610 in FIG. 6) may be more beneficial for power consumption, DL link budget, etc., and the base station 504 may advantageously configure the Rx antennas of the UE 502 accordingly.
[0135] At 906, the UE switches the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations. As an example, the switch may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) switching to utilize such a set of antennas based on an antenna configuration from a network node (e.g., the base station 504) .
[0136] The antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one of the set of antenna configurations (e.g., 618 in FIG. 6) , and the UE 502 may be configured to switch (at 510) the UE 502 to utilize the set of antennas based on the antenna configuration 508 (e.g., 706 in FIG. 7) indicating the one of the set of antenna configurations (e.g., 618 in FIG. 6) . For example, the UE 502 may be configured to switch (at 510) from a current antenna configuration (e.g., 1 Rx, 2 Rx, and / or 4 Rx, as indicated in the antenna capability indication 506 (e.g., 622 in FIG. 6) ) to the antenna configuration indicated in the antenna configuration 508 (e.g., 706 in FIG. 7) by the base station 504. As noted herein, switching combinations may include 1R_4R, 1R_2R, 2R_4R, thus, the switch (at 510) may include switching from 1 Rx antenna to 4 Rx antennas (e.g., 612 in FIG. 6) , from 1 Rx antenna to 2 Rx antennas (e.g., 614 in FIG. 6) , or from 2 Rx antennas to 4 Rx antennas (e.g., 616 in FIG. 6) .
[0137] At 908, the UE receives, from the network node and via a set of antennas associated with the antenna configuration, DL signaling. As an example, the reception may be performed by one or more of the component 198, the transceiver (s) 1122, and / or the antenna 1180 in FIG. 11. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a UE (e.g., the UE 502) receiving such DL signaling from a network node (e.g., the base station 504) .
[0138] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide, DL signaling 512 (e.g., 720 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and via a set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) . The DL signaling 512 (e.g., 720 in FIG. 7) may include a PDSCH, DL RSs (e.g., CSI-RS, etc. ) , configurations and / or scheduling therefor (e.g., 722, 724, 726, 728 in FIG. 7) (e.g., for MIMO layers associated with the PDSCH) , additional Tx / Rx parameters or sets thereof, and / or the like.
[0139] In aspects, receiving, by the UE 502 via the set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) may include receiving a parameter configuration (e.g., 722 in FIG. 7) that is indicative of a set of transmission parameters and / or a set of reception parameters (e.g., 724 in FIG. 7) associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , where the parameter configuration (e.g., 722 in FIG. 7) is based on the antenna configuration 508 (e.g., 706 in FIG. 7) , and / or may include receiving a scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) , where the scheduling indication (e.g., 726 in FIG. 7) is indicative of a PDSCH or a DL reference signal (e.g., 728 in FIG. 7) . In such aspects, the UE 502 may be configured to identify (e.g., at 730 in FIG. 7) an error case for the PDSCH and / or the DL reference signal based on a port indication (e.g., 718 in FIG. 7) of more than one port associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) for a single antenna configuration (e.g., 1 Rx (e.g., 610 in FIG. 6) . Additionally, or alternatively, the UE 502 may be configured to remove (e.g., at 732) or drop the PDSCH and / or the DL reference signal based on a conflict detection associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) .
[0140] FIG. 10 is a flowchart 1000 of a method of wireless communication. The method may be performed by a network entity / network node (e.g., the base station 102, 504, 604, 704; the network entity 1202) . In some aspects, the method may include aspects described in connection with the communication flow in FIG. 5, and / or aspects described in FIGs. 6, 7, 8. The method may be for receiver antenna configurations. The method may provide for flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0141] At 1002, the network node receives, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. As an example, the reception may be performed by one or more of the component 199, the transceiver (s) 1246, and / or the antenna 1280 in FIG. 12. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a network node (e.g., the base station 504) receiving such a capability indication from a UE (e.g., the UE 502) .
[0142] The UE 502 may be configured to transmit / provide, and the base station 504 may be configured to receive, an antenna capability indication 506 (e.g., 622 in FIG. 6) . That is, the UE 502 may be configured to provide, for a network node (e.g., the base station 504) , the antenna capability indication 506 (e.g., 622 in FIG. 6) that is indicative of at least one UE 502 capability associated with support of a set of antenna configurations (e.g., 618 in FIG. 6) . The at least one UE 502 capability indicated by the antenna capability indication 506 (e.g., 622 in FIG. 6) may be associated with support of a set of antenna switching configurations (e.g., 620 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) .
[0143] In aspects, the set of antenna configurations (e.g., 618 in FIG. 6) may be indicative of at least one of a two-antenna configuration (2 Rx) (e.g., 608 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) via a set of information parameters (e.g., 626 in FIG. 6) or a set of default parameters (e.g., 628 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) signaling may include an Rx number ‘Rx_number’ parameter with associated Rx antenna number values or default values and / or a switching combination ‘switching_combination’ parameter with associated antenna switching configuration (e.g., 612, 614, 616 in FIG. 6) values or default values.
[0144] In an example for the UE 502 with 4 Rx capability, the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 1R, 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a first band ‘X’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0145] In an example for a low-tier UE (e.g., with 1 Rx capability) , the UE 502 may report additional Rx antenna capability, and the information parameters (e.g., 626 in FIG. 6) may be: {Rx number: 2R, 4R; switching combination: 1R_4R, 1R_2R, 2R_4R} for a second band ‘Y’ . That is, the Rx number may 1 Rx, 2 Rx, and / or 4 Rx with 2 Rx and 4 Rx capabilities reported, in aspects, and the set of antenna switching configurations (e.g., 620 in FIG. 6) may include a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, and / or a third switch from the two-antenna configuration to the four-antenna configuration, in aspects.
[0146] Default parameters (e.g., 628 in FIG. 6) may be null parameters, zeros ( ‘0’ ) , and / or any other specified parameters and associated values. In aspects, the UE 502 may be configured, by default, to support the Rx number (s) which is less than 4 Rx (e.g., 606 in FIG. 6) (e.g., when the UE 502 has 4 Rx capability) and a corresponding switching combination if not indicated. In aspects, the UE 502 (e.g., when the UE 502 has 1 Rx capability) may be configured, by default, to support a corresponding switching combination per Rx number that the UE 502 indicates as being supported. In such aspects, signaling overhead may be reduced. Accordingly, the antenna capability indication 506 (e.g., 622 in FIG. 6) may be indicative of a default support of UE 502 for a single-antenna configuration (1 Rx) (e.g., 610 in FIG. 6) or a four-antenna configuration (4 Rx) (e.g., 606 in FIG. 6) . In aspects, the antenna capability indication 506 (e.g., 622 in FIG. 6) may include per-band capabilities, such as for TDD bands and / or FDD bands.
[0147] The UE 502 may be configured to generate and transmit / provide, and the base station 504 may be configured to receive, a channel measurement (s) 507. In one example, the UE 502 may be configured to measure / generate the channel measurement (s) 507 of a PDSCH via DL signaling from the base station 504. The UE 502 may be configured to provide the channel measurement (s) 507 to the base station 504 for determinations of antenna configurations to optimize power consumption, DL link budget, etc., in various signaling scenarios for the UE 502. Aspects also provide for multiple instances of generation / provision of the channel measurement (s) 507 to the base station 504 by the UE 502.
[0148] At 1004, the network node configures, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. As an example, the configuration may be performed by one or more of the component 199, the transceiver (s) 1246, and / or the antenna 1280 in FIG. 12. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a network node (e.g., the base station 504) configuring, with such an antenna configuration, a UE (e.g., the UE 502) .
[0149] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide (e.g., to configure) , an antenna configuration 508 (e.g., 706 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and based on the antenna capability indication 506 (e.g., 622 in FIG. 6) , the antenna configuration 508 (e.g., 706 in FIG. 7) that is indicative of one of the set of antenna configurations (e.g., 618 in FIG. 6) . For instance, the antenna capability indication 506 (e.g., 622 in FIG. 6) may indicate the set of antenna configurations (e.g., 618 in FIG. 6) (e.g., the Rx number may 1 Rx, 2 Rx, and / or 4 Rx, as noted above) , and the antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one such antenna configuration for the UE 502. In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504, and received by the UE 502, in an information element (IE) in RRC signaling, a medium access control (MAC) control element (MAC-CE) , and / or DCI.
[0150] In aspects, the antenna configuration 508 (e.g., 706 in FIG. 7) may be transmitted / provided by the base station 504 based at least in part on the channel measurement (s) 507 reported by the UE 502. That is, based on different channel conditions experienced by the UE 502, different Rx antenna configurations (e.g., 606, 608, 610 in FIG. 6) may be more beneficial for power consumption, DL link budget, etc., and the base station 504 may advantageously configure the Rx antennas of the UE 502 accordingly.
[0151] The antenna configuration 508 (e.g., 706 in FIG. 7) may indicate one of the set of antenna configurations (e.g., 618 in FIG. 6) , and the UE 502 may be configured to switch (at 510) the UE 502 to utilize the set of antennas based on the antenna configuration 508 (e.g., 706 in FIG. 7) indicating the one of the set of antenna configurations (e.g., 618 in FIG. 6) . For example, the UE 502 may be configured to switch (at 510) from a current antenna configuration (e.g., 1 Rx, 2 Rx, and / or 4 Rx, as indicated in the antenna capability indication 506 (e.g., 622 in FIG. 6) ) to the antenna configuration indicated in the antenna configuration 508 (e.g., 706 in FIG. 7) by the base station 504. As noted herein, switching combinations may include 1R_4R, 1R_2R, 2R_4R, thus, the switch (at 510) may include switching from 1 Rx antenna to 4 Rx antennas (e.g., 612 in FIG. 6) , from 1 Rx antenna to 2 Rx antennas (e.g., 614 in FIG. 6) , or from 2 Rx antennas to 4 Rx antennas (e.g., 616 in FIG. 6) .
[0152] At 1006, the network node provides, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling. As an example, the provision may be performed by one or more of the component 199, the transceiver (s) 1246, and / or the antenna 1280 in FIG. 12. FIG. 5 illustrates, in the context of FIGs. 6, 7, an example of a network node (e.g., the base station 504) providing such a DL signaling for a UE (e.g., the UE 502) .
[0153] The UE 502 may be configured to receive, and the base station 504 may be configured to transmit / provide, DL signaling 512 (e.g., 720 in FIG. 7) . That is, the UE 502 may be configured to receive, from the network node (e.g., the base station 504) and via a set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) . The DL signaling 512 (e.g., 720 in FIG. 7) may include a PDSCH, DL RSs (e.g., CSI-RS, etc. ) , configurations and / or scheduling therefor (e.g., 722, 724, 726, 728 in FIG. 7) (e.g., for MIMO layers associated with the PDSCH) , additional Tx / Rx parameters or sets thereof, and / or the like.
[0154] In aspects, receiving, by the UE 502 via the set of antennas associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , the DL signaling 512 (e.g., 720 in FIG. 7) may include receiving a parameter configuration (e.g., 722 in FIG. 7) that is indicative of a set of transmission parameters and / or a set of reception parameters (e.g., 724 in FIG. 7) associated with the antenna configuration 508 (e.g., 706 in FIG. 7) , where the parameter configuration (e.g., 722 in FIG. 7) is based on the antenna configuration 508 (e.g., 706 in FIG. 7) , and / or may include receiving a scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) , where the scheduling indication (e.g., 726 in FIG. 7) is indicative of a PDSCH or a DL reference signal (e.g., 728 in FIG. 7) . In such aspects, the UE 502 may be configured to identify (e.g., at 730 in FIG. 7) an error case for the PDSCH and / or the DL reference signal based on a port indication (e.g., 718 in FIG. 7) of more than one port associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) for a single antenna configuration (e.g., 1 Rx (e.g., 610 in FIG. 6) ) . Additionally, or alternatively, the UE 502 may be configured to remove (e.g., at 732) or drop the PDSCH and / or the DL reference signal based on a conflict detection associated with the parameter configuration (e.g., 722 in FIG. 7) and / or the scheduling indication (e.g., 726 in FIG. 7) associated with the DL signaling 512 (e.g., 720 in FIG. 7) .
[0155] Accordingly, flexibly implementing supported options for Rx antenna configurations, as configured by the base station 504 for targeted DL signaling scenarios, aspects enable the UE 502 reporting of its supported receiver antenna configurations and its supported antenna switching configurations (e.g., for numbers of Rx antennas and Rx switching) , as well as UE-reported channel measurements, to reduce power consumption in some signaling scenarios, while providing mitigation for DL link budget loss at the cell edge through Rx antenna configurations and channel / signal scheduling in other signaling scenarios.
[0156] FIG. 11 is a diagram 1100 illustrating an example of a hardware implementation for an apparatus 1104. The apparatus 1104 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1104 may include at least one cellular baseband processor 1124 (also referred to as a modem) coupled to one or more transceivers 1122 (e.g., cellular RF transceiver) . The cellular baseband processor (s) 1124 may include at least one on-chip memory 1124'. In some aspects, the apparatus 1104 may further include one or more subscriber identity modules (SIM) cards 1120 and at least one application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110. The application processor (s) 1106 may include on-chip memory 1106'. In some aspects, the apparatus 1104 may further include a Bluetooth module 1112, a WLAN module 1114, an SPS module 1116 (e.g., GNSS module) , one or more sensor modules 1118 (e.g., barometric pressure sensor / altimeter; motion sensor such as inertial measurement unit (IMU) , gyroscope, and / or accelerometer (s) ; light detection and ranging (LIDAR) , radio assisted detection and ranging (RADAR) , sound navigation and ranging (SONAR) , magnetometer, audio and / or other technologies used for positioning) , additional memory modules 1126, a power supply 1130, and / or a camera 1132. The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include an on-chip transceiver (TRX) (or in some cases, just a receiver (RX) ) . The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include their own dedicated antennas and / or utilize the antennas 1180 for communication. The cellular baseband processor (s) 1124 communicates through the transceiver (s) 1122 via one or more antennas 1180 with the UE 104 and / or with an RU associated with a network entity 1102. The cellular baseband processor (s) 1124 and the application processor (s) 1106 may each include a computer-readable medium / memory 1124', 1106', respectively. The additional memory modules 1126 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1124', 1106', 1126 may be non-transitory. The cellular baseband processor (s) 1124 and the application processor (s) 1106 are each responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor (s) 1124 / application processor (s) 1106, causes the cellular baseband processor (s) 1124 / application processor (s) 1106 to perform the various functions described supra. The cellular baseband processor (s) 1124 and the application processor (s) 1106 are configured to perform the various functions described supra based at least in part of the information stored in the memory. That is, the cellular baseband processor (s) 1124 and the application processor (s) 1106 may be configured to perform a first subset of the various functions described supra without information stored in the memory and may be configured to perform a second subset of the various functions described supra based on the information stored in the memory. The computer-readable medium / memory may also be used for storing data that is manipulated by the cellular baseband processor (s) 1124 / application processor (s) 1106 when executing software. The cellular baseband processor (s) 1124 / application processor (s) 1106 may be a component of the UE 350 and may include the at least one memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 1104 may be at least one processor chip (modem and / or application) and include just the cellular baseband processor (s) 1124 and / or the application processor (s) 1106, and in another configuration, the apparatus 1104 may be the entire UE (e.g., see UE 350 of FIG. 3) and include the additional modules of the apparatus 1104.
[0157] As discussed supra, the component 198 may be configured to provide, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The component 198 may also be configured to receive, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. The component 198 may also be configured to receive, from the network node and via a set of antennas associated with the antenna configuration, DL signaling. The component 198 may be configured to switch the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations. The component 198 may be further configured to perform any of the aspects described in connection with the flowcharts in any of FIGs. 8, 9, 10, and / or any of the aspects performed by a UE for any of FIGs. 4-7. The component 198 may be within the cellular baseband processor (s) 1124, the application processor (s) 1106, or both the cellular baseband processor (s) 1124 and the application processor (s) 1106. The component 198 may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may perform the stated processes / algorithm individually or in combination. As shown, the apparatus 1104 may include a variety of components configured for various functions. In one configuration, the apparatus 1104, and in particular the cellular baseband processor (s) 1124 and / or the application processor (s) 1106, may include means for providing, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. In the configuration, the apparatus 1104, and in particular the cellular baseband processor (s) 1124 and / or the application processor (s) 1106, may include means for receiving, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations. In one configuration, the apparatus 1104, and in particular the cellular baseband processor (s) 1124 and / or the application processor (s) 1106, may include means for receiving, from the network node and via a set of antennas associated with the antenna configuration, DL signaling. In one configuration, the apparatus 1104, and in particular the cellular baseband processor (s) 1124 and / or the application processor (s) 1106, may include means for switching the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations. The means may be the component 198 of the apparatus 1104 configured to perform the functions recited by the means. As described supra, the apparatus 1104 may include the TX processor 368, the RX processor 356, and the controller / processor 359. As such, in one configuration, the means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by the means.
[0158] FIG. 12 is a diagram 1200 illustrating an example of a hardware implementation for a network entity 1202. The network entity 1202 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1202 may include at least one of a CU 1210, a DU 1230, or an RU 1240. For example, depending on the layer functionality handled by the component 199, the network entity 1202 may include the CU 1210; both the CU 1210 and the DU 1230; each of the CU 1210, the DU 1230, and the RU 1240; the DU 1230; both the DU 1230 and the RU 1240; or the RU 1240. The CU 1210 may include at least one CU processor 1212. The CU processor (s) 1212 may include on-chip memory 1212'. In some aspects, the CU 1210 may further include additional memory modules 1214 and a communications interface 1218. The CU 1210 communicates with the DU 1230 through a midhaul link, such as an F1 interface. The DU 1230 may include at least one DU processor 1232. The DU processor (s) 1232 may include on-chip memory 1232'. In some aspects, the DU 1230 may further include additional memory modules 1234 and a communications interface 1238. The DU 1230 communicates with the RU 1240 through a fronthaul link. The RU 1240 may include at least one RU processor 1242. The RU processor (s) 1242 may include on-chip memory 1242'. In some aspects, the RU 1240 may further include additional memory modules 1244, one or more transceivers 1246, antennas 1280, and a communications interface 1248. The RU 1240 communicates with the UE 104. The on-chip memory 1212', 1232', 1242'a nd the additional memory modules 1214, 1234, 1244 may each be considered a computer-readable medium / memory. Each computer-readable medium / memory may be non-transitory. Each of the processors 1212, 1232, 1242 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor (s) causes the processor (s) to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the processor (s) when executing software.
[0159] As discussed supra, the component 199 may be configured to receive, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. The component 199 may also be configured to configure, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. The component 199 may also be configured to provide, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling. The component 199 may be further configured to perform any of the aspects described in connection with the flowcharts in any of FIGs. 8, 9, 10, and / or any of the aspects performed by a network entity / network node for any of FIGs. 4-7. The component 199 may be within one or more processors of one or more of the CU 1210, DU 1230, and the RU 1240. The component 199 may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may perform the stated processes / algorithm individually or in combination. The network entity 1202 may include a variety of components configured for various functions. In one configuration, the network entity 1202 may include means for receiving, from a UE, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations. In the configuration, the network entity 1202 may include means for configuring, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations. In the configuration, the network entity 1202 may include means for providing, for the UE and a set of antennas thereof associated with the antenna configuration, DL signaling. The means may be the component 199 of the network entity 1202 configured to perform the functions recited by the means. As described supra, the network entity 1202 may include the TX processor 316, the RX processor 370, and the controller / processor 375. As such, in one configuration, the means may be the TX processor 316, the RX processor 370, and / or the controller / processor 375 configured to perform the functions recited by the means.
[0160] Communications between network nodes (e.g., base stations, gNBs, etc. ) and UEs may utilize antenna configurations. In communications for FDD bands, having two receiver antennas (e.g., 2Rx) may be mandated, and in communications for TDD bands, having four receiver antennas (e.g., 4Rx) may be mandated. Low-tier UEs, such as RedCap UEs, may support a maximum of one receiver antenna (e.g., 1Rx) or two receiver antennas (e.g., 2Rx) for lower costs and reduced power consumption. However, a normal UE (e.g., 2Rx / 4Rx) may be configured with its maximum capability (e.g., 2Rx or 4Rx) at all times with the exception of SRS Tx switching for measurements. Additionally, MNOs may utilize reduced Rx configurations for power consumption gain, but this has concerns for DL link budget loss at the cell edge. Current solutions lack configurable mechanism to achieve both power consumption and link budget.
[0161] Aspects herein for receiver antenna configurations provide for flexible implementation of Rx antenna configurations by enabling a UE to report its supported receiver antenna configurations and its supported antenna switching configurations, and provide for reduced power consumption in some scenarios, while also providing mitigation for DL link budget loss at the cell edge in other scenarios, through Rx antenna configurations and channel / signal scheduling by enabling flexible Rx configurations for numbers of Rx antennas and Rx switching, and utilizing UE-reported channel measurements.
[0162] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not limited to the specific order or hierarchy presented.
[0163] The previous 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 readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not limited to the aspects described herein, but are to be accorded the full scope consistent with the language claims. Reference to an element in the singular does not mean “one and only one” unless specifically so stated, but rather “one or more. ” Terms such as “if, ” “when, ” and “while” do not imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when, ” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. Sets should be interpreted as a set of elements where the elements number one or more. Accordingly, for a set of X, X would include one or more elements. When at least one processor is configured to perform a set of functions, the at least one processor, individually or in any combination, is configured to perform the set of functions. Accordingly, each processor of the at least one processor may be configured to perform a particular subset of the set of functions, where the subset is the full set, a proper subset of the set, or an empty subset of the set. A processor may be referred to as processor circuitry. A memory / memory module may be referred to as memory circuitry. If a first apparatus receives data from or transmits data to a second apparatus, the data may be received / transmitted directly between the first and second apparatuses, or indirectly between the first and second apparatuses through a set of apparatuses. A device configured to “output” data or “provide” data, such as a transmission, signal, or message, may transmit the data, for example with a transceiver, or may send the data to a device that transmits the data. A device configured to “obtain” data, such as a transmission, signal, or message, may receive, for example with a transceiver, or may obtain the data from a device that receives the data. Information stored in a memory includes instructions and / or data. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are encompassed by the claims. Moreover, nothing disclosed herein is dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”
[0164] As used herein, the phrase “based on” shall not be construed as a reference to a closed set of information, one or more conditions, one or more factors, or the like. In other words, the phrase “based on A” (where “A” may be information, a condition, a factor, or the like) shall be construed as “based at least on A” unless specifically recited differently.
[0165] The following aspects are illustrative only and may be combined with other aspects or teachings described herein, without limitation.
[0166] Aspect 1 is a method of wireless communication at a user equipment (UE) , comprising: providing, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations; receiving, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations; and receiving, from the network node and via a set of antennas associated with the antenna configuration, downlink (DL) signaling.
[0167] Aspect 2 is the method of aspect 1, wherein the set of antenna configurations is further indicative of at least one of a two-antenna configuration or a four-antenna configuration via a set of information parameters or a default parameter.
[0168] Aspect 3 is the method of aspect 2, wherein the antenna capability indication is further indicative of a default UE support of a single-antenna configuration or the four-antenna configuration.
[0169] Aspect 4 is the method of any of aspects 1 to 3, wherein the at least one UE capability is further associated with support of a set of antenna switching configurations via a set of information parameters or a default parameter.
[0170] Aspect 5 is the method of aspect 4, wherein the antenna configuration indicates the one of the set of antenna configurations, the method further comprising: switching the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations.
[0171] Aspect 6 is the method of any of aspects 4 and 5, wherein the set of antenna switching configurations includes at least one of: a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, or a third switch from the two-antenna configuration to the four-antenna configuration.
[0172] Aspect 7 is the method of any of aspects 1 to 6, wherein receiving the antenna configuration includes receiving the antenna configuration by at least one of an information element (IE) in radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .
[0173] Aspect 8 is the method of aspect 7, wherein the IE in the RRC signaling corresponds to the UE and one of a frequency division duplex band or a time division duplex band; wherein the MAC-CE includes a DL carrier activation; or wherein the DCI includes a scheduling of one port or two ports.
[0174] Aspect 9 is the method of any of aspects 1 to 8, wherein receiving, via the set of antennas associated with the antenna configuration, the DL signaling includes at least one of: receiving a parameter configuration that is indicative of at least one of a set of transmission parameters or a set of reception parameters associated with the antenna configuration, wherein the parameter configuration is based on the antenna configuration; or receiving a scheduling indication associated with the DL signaling, wherein the scheduling indication is indicative of at least one of a physical downlink shared channel (PDSCH) or a DL reference signal.
[0175] Aspect 10 is the method of aspect 9, wherein receiving, via the set of antennas associated with the antenna configuration, the DL signaling includes at least one of: identifying an error case for at least one of the PDSCH or the DL reference signal based on a port indication of more than one port associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling for a single antenna configuration; or removing at least one of the PDSCH or the DL reference signal based on a conflict detection associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling.
[0176] Aspect 11 is a method of wireless communication at a network node, comprising: receiving, from a user equipment (UE) , an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations; configuring, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations; and providing, for the UE and a set of antennas thereof associated with the antenna configuration, downlink (DL) signaling.
[0177] Aspect 12 is the method of aspect 11, wherein the set of antenna configurations is further indicative of at least one of a two-antenna configuration or a four-antenna configuration via a set of information parameters or a default parameter.
[0178] Aspect 13 is the method of aspect 12, wherein the antenna capability indication is further indicative of a default UE support of a single-antenna configuration or the four-antenna configuration.
[0179] Aspect 14 is the method of any of aspects 11 to 13, the at least one UE capability is further associated with support of a set of antenna switching configurations via a set of information parameters or a default parameter.
[0180] Aspect 15 is the method of aspect 14, wherein the set of antenna switching configurations includes at least one of: a first switch from a single-antenna configuration to a four-antenna configuration, a second switch from the single-antenna configuration to a two-antenna configuration, or a third switch from the two-antenna configuration to the four-antenna configuration.
[0181] Aspect 16 is the method of any of aspects 11 to 15, wherein configuring the antenna configuration includes configuring the antenna configuration by at least one of an information element (IE) in radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .
[0182] Aspect 17 is the method of aspect 16, wherein the IE in the RRC signaling corresponds to the UE and one of a frequency division duplex band or a time division duplex band; wherein the MAC-CE includes a DL carrier activation; or wherein the DCI includes a scheduling of one port or two ports.
[0183] Aspect 18 is the method of any of aspects 11 to 17, wherein providing, for the set of antennas associated with the antenna configuration, the DL signaling includes at least one of: providing a parameter configuration that is indicative of at least one of a set of transmission parameters or a set of reception parameters associated with the antenna configuration, wherein the parameter configuration is based on the antenna configuration; or providing a scheduling indication associated with the DL signaling, wherein the scheduling indication is indicative of at least one of a physical downlink shared channel (PDSCH) or a DL reference signal.
[0184] Aspect 19 is the method of aspect 18, wherein providing, for the set of antennas associated with the antenna configuration, the DL signaling includes at least one of: receiving a first indication of an error case for at least one of the PDSCH or the DL reference signal based on a port indication of more than one port associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling for a single antenna configuration; or receiving a second indication of a removal of at least one of the PDSCH or the DL reference signal based on a conflict detection associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling.
[0185] Aspect 20 is an apparatus for wireless communication at a user equipment (UE) , comprising: at least one memory; and at least one processor coupled to the at least one memory, the at least one processor, individually or in any combination, is configured to perform the method of any of aspects 1 to 10.
[0186] Aspect 21 is an apparatus for wireless communication at a user equipment (UE) , comprising means for performing each step in the method of any of aspects 1 to 10.
[0187] Aspect 22 is the apparatus of any of aspects 20 and 21, further comprising a transceiver configured to receive or to transmit in association with the method of any of aspects 1 to 10.
[0188] Aspect 23 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer executable code at a user equipment (UE) , the code when executed by at least one processor causes the at least one processor to perform the method of any of aspects 1 to 10.
[0189] Aspect 24 is an apparatus for wireless communication at a network node, comprising: at least one memory; and at least one processor coupled to the at least one memory, the at least one processor, individually or in any combination, is configured to perform the method of any of aspects 11 to 19.
[0190] Aspect 25 is an apparatus for wireless communication at a network node, comprising means for performing each step in the method of any of aspects 11 to 19.
[0191] Aspect 26 is the apparatus of any of aspects 24 and 25, further comprising a transceiver configured to receive or to transmit in association with the method of any of aspects 11 to 19.
[0192] Aspect 27 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer executable code at a network node, the code when executed by at least one processor causes the at least one processor to perform the method of any of aspects 11 to 19.
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:at least one memory; andat least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to:provide, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations;receive, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations; andreceive, from the network node and via a set of antennas associated with the antenna configuration, downlink (DL) signaling.2.The apparatus of claim 1, wherein the set of antenna configurations is further indicative of at least one of a two-antenna configuration or a four-antenna configuration via a set of information parameters or a default parameter.3.The apparatus of claim 2, wherein the antenna capability indication is further indicative of a default UE support of a single-antenna configuration or the four-antenna configuration.4.The apparatus of claim 1, wherein the at least one UE capability is further associated with support of a set of antenna switching configurations via a set of information parameters or a default parameter.5.The apparatus of claim 4, wherein the antenna configuration indicates the one of the set of antenna configurations, wherein the at least one processor, individually or in any combination, is further configured to:switch the UE to utilize the set of antennas based on the antenna configuration indicating the one of the set of antenna configurations.6.The apparatus of claim 4, wherein the set of antenna switching configurations includes at least one of:a first switch from a single-antenna configuration to a four-antenna configuration,a second switch from the single-antenna configuration to a two-antenna configuration, ora third switch from the two-antenna configuration to the four-antenna configuration.7.The apparatus of claim 1, wherein to receive the antenna configuration, the at least one processor, individually or in any combination, is configured to receive the antenna configuration by at least one of an information element (IE) in radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .8.The apparatus of claim 7, wherein the IE in the RRC signaling corresponds to the UE and one of a frequency division duplex band or a time division duplex band;wherein the MAC-CE includes a DL carrier activation; orwherein the DCI includes a scheduling of one port or two ports.9.The apparatus of claim 1, further comprising at least one transceiver coupled to the at least one processor, wherein to receive, via the set of antennas associated with the antenna configuration, the DL signaling, the at least one processor, individually or in any combination and via the at least one transceiver, is configured to perform at least one of:receive a parameter configuration that is indicative of at least one of a set of transmission parameters or a set of reception parameters associated with the antenna configuration, wherein the parameter configuration is based on the antenna configuration; orreceive a scheduling indication associated with the DL signaling, wherein the scheduling indication is indicative of at least one of a physical downlink shared channel (PDSCH) or a DL reference signal.10.The apparatus of claim 9, wherein to receive, via the set of antennas associated with the antenna configuration, the DL signaling, the at least one processor, individually or in any combination, is configured to perform at least one of:identify an error case for at least one of the PDSCH or the DL reference signal based on a port indication of more than one port associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling for a single antenna configuration; orremove at least one of the PDSCH or the DL reference signal based on a conflict detection associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling.11.An apparatus for wireless communication at a network node, comprising:at least one memory; andat least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to:receive, from a user equipment (UE) , an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations;configure, based on the antenna capability indication, the UE with an antenna configuration that is indicative of one of the set of antenna configurations; andprovide, for the UE and a set of antennas thereof associated with the antenna configuration, downlink (DL) signaling.12.The apparatus of claim 11, wherein the set of antenna configurations is further indicative of at least one of a two-antenna configuration or a four-antenna configuration via a set of information parameters or a default parameter.13.The apparatus of claim 12, wherein the antenna capability indication is further indicative of a default UE support of a single-antenna configuration or the four-antenna configuration.14.The apparatus of claim 11, the at least one UE capability is further associated with support of a set of antenna switching configurations via a set of information parameters or a default parameter.15.The apparatus of claim 14, wherein the set of antenna switching configurations includes at least one of:a first switch from a single-antenna configuration to a four-antenna configuration,a second switch from the single-antenna configuration to a two-antenna configuration, ora third switch from the two-antenna configuration to the four-antenna configuration.16.The apparatus of claim 11, wherein to configure the antenna configuration, the at least one processor, individually or in any combination, is configured to configure the antenna configuration by at least one of an information element (IE) in radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .17.The apparatus of claim 16, wherein the IE in the RRC signaling corresponds to the UE and one of a frequency division duplex band or a time division duplex band;wherein the MAC-CE includes a DL carrier activation; orwherein the DCI includes a scheduling of one port or two ports.18.The apparatus of claim 11, further comprising at least one transceiver coupled to the at least one processor, wherein to provide, for the set of antennas associated with the antenna configuration, the DL signaling, the at least one processor, individually or in any combination and via the at least one transceiver, is configured to perform at least one of:provide a parameter configuration that is indicative of at least one of a set of transmission parameters or a set of reception parameters associated with the antenna configuration, wherein the parameter configuration is based on the antenna configuration; orprovide a scheduling indication associated with the DL signaling, wherein the scheduling indication is indicative of at least one of a physical downlink shared channel (PDSCH) or a DL reference signal.19.The apparatus of claim 18, wherein to provide, for the set of antennas associated with the antenna configuration, the DL signaling, the at least one processor, individually or in any combination, is configured to perform at least one of:receive a first indication of an error case for at least one of the PDSCH or the DL reference signal based on a port indication of more than one port associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling for a single antenna configuration; orreceive a second indication of a removal of at least one of the PDSCH or the DL reference signal based on a conflict detection associated with one or more of the parameter configuration or the scheduling indication associated with the DL signaling.20.A method of wireless communication at a user equipment (UE) , comprising:providing, for a network node, an antenna capability indication that is indicative of at least one UE capability associated with support of a set of antenna configurations;receiving, from the network node and based on the antenna capability indication, an antenna configuration that is indicative of one of the set of antenna configurations; andreceiving, from the network node and via a set of antennas associated with the antenna configuration, downlink (DL) signaling.
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