CSI Enhancement For SBFD Configuration

Abstract

The network node may transmit the RS to the UE in a symbol or slot. The RS may extend over a plurality of downlink sub-bands, the plurality of downlink sub-bands having non-contiguous sub-carriers in the symbol or the time slot. At least two downlink sub-bands of the plurality of downlink sub-bands may be separated by uplink sub-bands in the symbol or the time slot. The plurality of downlink sub-bands and the uplink sub-band may be associated with a sub-band full duplex operation at a network node. The RS may include a CSI-RS. The UE may measure the RS from the network node in the symbol or the time slot. The UE may generate at least one CSI metric based on the measurement of the RS. The network node may receive a CSI report from the UE based on the RS and at least one CSI metric.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. patent application serial number 17 / 934,457, filed on September 22, 2022, entitled “CSI ENHANCEMENT FOR SBFD CONFIGURATION,” which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly to channel state measurement and reporting associated with sub-band full-duplex (SBFD) configurations in wireless communication systems. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. 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.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Certain aspects of 5G NR may be based on 4G Long Term Evolution (LTE) standards. It is necessary to further improve 5G NR technology. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0006] A simplified summary of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive review of all contemplated aspects. This summary neither identifies the key or important elements of all aspects, nor describes 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 a more detailed description presented later.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment (UE). The apparatus may measure a reference signal (RS) from a network node in a symbol or a time slot. The RS may extend over a plurality of downlink subbands having non-continuous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at a network node. The apparatus may generate at least one channel state information (CSI) metric based on the measurement of the RS.

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a network node. The apparatus may send an RS to a UE in a symbol or a time slot. The RS may extend over a plurality of downlink subbands, the plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The apparatus may receive a CSI report from the UE based on the RS and at least one CSI metric.

[0009] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some exemplary features of one or more aspects. However, these features indicate only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

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

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

[0013] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0014] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0016] Figure 4 is an example diagram illustrating the operation of SBFD according to one or more aspects of the present disclosure.

[0017] Figure 5 is an example diagram illustrating transmission of CSI-RS associated with SBFD operation according to one or more aspects of the present disclosure.

[0018] Figure 6 The present invention is a diagram showing a communication flow of a wireless communication method.

[0019] Figure 7 is a flow chart of a wireless communication method.

[0020] Figure 8 is a flow chart of a wireless communication method.

[0021] Fig. 9 is a flow chart of a wireless communication method.

[0022] Fig.10 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities.

[0023] Fig.11 is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0024] Full-duplex communication in which uplink and downlink communications are located in different non-overlapping frequency sub-bands may be referred to as SBFD or sub-band frequency division duplex (FDD). SBFD operation may be associated with various advantages. For example, an increased uplink duty cycle may result in reduced latency (e.g., downlink signals may be received in the original uplink time slot, thereby achieving latency savings) and / or improved uplink coverage. In addition, SBFD operation may enhance system capabilities, resource utilization, and / or spectral efficiency. Furthermore, SBFD operation may enable flexible and dynamic uplink / downlink resource adaptation according to uplink / downlink traffic in a robust manner. In some configurations, resource allocation may be enhanced in symbols / time slots having sub-bands that network nodes may use for SBFD operation.

[0025] According to one or more aspects, a network node may send an RS to a UE in a symbol or a time slot. The RS may extend over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The UE may measure the RS from the network node in the symbol or the time slot. The UE may generate at least one CSI metric based on the measurement of the RS. The network node may receive a CSI report from the UE based on the RS and the at least one CSI metric. Therefore, the accuracy of the reported CSI measurement associated with SBFD operation may be improved.

[0026] The specific embodiments described below in conjunction with the accompanying drawings are descriptions of various configurations and do not represent the only configurations in which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid blurring such concepts.

[0027] Several aspects of telecommunication systems are presented with reference to various apparatuses and methods. These apparatuses 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 these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0028] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system", which includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic components, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.

[0029] Thus, in one or more example aspects, specific implementations and / or use cases, the described functionality may be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available media that can be accessed by a computer. As an example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these 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.

[0030] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, various aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Various aspects, specific implementations and / or use cases may be in the range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems in conjunction with one or more technologies herein. In some actual settings, the equipment combined with the various aspects and features described may also include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.) The techniques described herein can be practiced in a wide variety of devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0031] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0032] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0033] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0034] Figure 11 is a diagram 100 illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that may 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. The CU 110 may communicate with one or more DUs 130 via corresponding midhaul links, such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0035] Each of these units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO framework 105) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive and / or transmit signals to one or more of the other units via a wireless transmission medium.

[0036] In some aspects, CU 110 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 110. 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 specific implementations, CU 110 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 110 may be implemented to communicate with DU 130 for network control and signaling.

[0037] DU 130 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) at least in part according to a functional split such as those defined by 3GPP. In some aspects, DU 130 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0038] The lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RU 140 controlled by the 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, etc.), or both, based at least in part on functional splitting (such as lower layer functional splitting). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the implementation of the DU 130 and the CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0039] The SMO framework 105 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some specific implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. Additionally, in some specific implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0040] The non-RT RIC 115 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or in communication with the near-RT RIC 125 (such as via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB with the near-RT RIC 125.

[0041] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0042] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component is indicated by a dotted line to indicate that each component may be included in the base station 102 or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to RU 140 and / or downlink (DL) (also known as forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) bandwidth. These carriers may or may not be adjacent to each other. The allocation of carriers may be equivalent to DL and UL asymmetric (e.g., more or fewer carriers may be allocated to DL than to UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0043] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0044] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, for example, in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0045] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5GNR, 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 (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. A similar naming problem sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0046] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, so the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6GHz-71GHz), FR4 (71GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0047] In view of the above, unless otherwise specified, if the term "sub-6 GHz" or the like is used herein, it may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" or the like is used herein, it may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.

[0048] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may send 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 send 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 direction and transmit direction for each of the base station 102 / UE 104. The transmit direction and receive direction of the base station 102 may be the same or may not be the same. The transmit direction and receive direction of the UE 104 may be the same or may not be the same.

[0049] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), a network node, a network entity, a network equipment, or some other suitable term. The base station 102 may be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and a RU, or as a decomposed base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include decomposed base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0050] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that handles signaling between UE 104 and core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. 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, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, LMF 166, position determination entity (PDE), serving mobile location center (SMLC), mobile positioning center (MPC), etc. GMLC 165 and LMF 166 support UE location services. GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. LMF 166 receives measurement and assistance information from NG-RAN and UE 104 via AMF 161 to calculate the location of UE 104. NG-RAN may determine the location of UE 104 using one or more positioning methods. Positioning UE 104 may involve signal measurements, position estimation, and optional speed calculation based on these measurements. Signal measurements may be performed by UE 104 and / or serving base station 102. The measured signals may be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / positioning systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., an atmospheric pressure sensor, a motion sensor), an NR enhanced cell ID (NR E-CID) method, 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 one or more of other systems / signals / sensors.

[0051] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or some other suitable terminology. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device constellation arrangement. One or more of these devices may access the network collectively and / or individually.

[0052] Reference again Figure 1 In some aspects, the UE 104 may include a channel state component 198, which may be configured to measure an RS from a network node in a symbol or a time slot. The RS may extend over a plurality of downlink subbands, the plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The channel state component 198 may be configured to generate at least one CSI metric based on the measurement of the RS. In some aspects, the base station 102 may include a channel state component 199, which may be configured to send an RS to the UE in a symbol or a time slot. The RS may extend over a plurality of downlink subbands, the plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The multiple downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The channel state component 199 may be configured to receive a CSI report from the UE based on the RS and at least one CSI metric. Although the following description may focus on 5G NR or future wireless technologies, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0053] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD) (wherein for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL), or may be time division duplex (TDD) (wherein for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL). Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format through the received slot format indicator (SFI) (dynamically configured through DL control information (DCI) or semi-statically / statically configured through radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0054] FIG. 2A to FIG. 2DThe frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4, or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For a normal CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The numerology defines the subcarrier spacing (SCS) (see Table 1). The symbol length / duration can be scaled with 1 / SCS.

[0055]

[0056] Table 1: Parameter set, SCS and CP

[0057] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Thus, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example is provided for a normal CP with 14 symbols per slot and a parameter set 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 about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0058] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0059] like Figure 2A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0060] Figure 2B Examples of various DL channels within a subframe of a frame are illustrated. A 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 a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identification. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent via the PBCH (such as a system information block (SIB)), and paging messages.

[0061] like Figure 2CAs illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0062] Figure 2D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may be used to carry, among other things, a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0063] Figure 3370 is a block diagram of a base station 310 in an access network communicating with a UE 350. 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, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery 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.

[0064] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be separated 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 pre-coded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel state feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier for transmission using a corresponding spatial stream.

[0065] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. 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 point sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to a controller / processor 359, which implements layer 3 and layer 2 functionality.

[0066] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0067] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer 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.

[0068] Channel estimates derived by the channel estimator 358 based on a reference signal or feedback sent by the base station 310 may be used by the TX processor 368 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0069] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0070] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0071] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The channel state component 198 combines various aspects.

[0072] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 The channel state component 199 combines various aspects.

[0073] Further evolution of NR duplex operation may refer to the specific implementation of technologies such as sub-band non-overlapping full-duplex and / or dynamic / flexible TDD enhancements. Potential enhancements may be implemented to support duplex evolution of NR TDD in unpaired spectrum. In some configurations, duplex enhancements may be implemented on the network node (e.g., base station) side, while the UE side may continue to use half-duplex operation. When implementing these technologies, there may or may not be restrictions on the frequency range.

[0074] In order to achieve sub-band non-overlapping full-duplex and / or dynamic / flexible TDD enhancement, cross-link interference (CLI) between network nodes and / or between UEs can be handled and managed. In addition, for sub-band non-overlapping full-duplex, intra-sub-band CLI and / or inter-sub-band CLI can also be considered. The impact on RF specifications caused by self-interference, inter-sub-band CLI and inter-operator CLI on the network node side, and inter-sub-band CLI and inter-operator CLI on the UE side can also be considered. In addition, their impact on legacy operations assuming that the above-mentioned technologies coexist on the same channel or adjacent channels can also be considered.

[0075] Full-duplex communication (i.e., simultaneous transmission and reception) may be in the same frequency band. In additional configurations, uplink communication and downlink communication may be in different non-overlapping frequency sub-bands, in the same frequency sub-bands, or in partially overlapping frequency sub-bands. Specifically, full-duplex communication in which uplink communication and downlink communication are in different non-overlapping frequency sub-bands may be referred to as SBFD or sub-band FDD.

[0076] Figure 44 is an example diagram 400 illustrating the operation of an SBFD according to one or more aspects of the present disclosure. As shown, diagram 410 may illustrate an example environment in which the SBFD may operate. Diagram 420 may illustrate an example time-frequency resource allocation associated with SBFD operation. Diagram 420 shows two downlink subbands 422 and 426 separated by an uplink subband 424. Therefore, downlink subbands 422 and 426 may be referred to as non-contiguous downlink subbands. In some configurations, there may be a guard band (not shown) between the downlink subband 422 and the uplink subband 424 and / or between the uplink subband 424 and the downlink subband 426. The use of a guard band between an uplink subband and a downlink subband may help reduce self-interference (SI).

[0077] In the example shown, during the SBFD timeslot 428, the network node 402 may operate in full-duplex mode on a subband basis based on the SBFD operation, while the UE 404 and the UE 406 may operate in half-duplex mode. Specifically, the network node 402 may use the downlink beam 412 and the downlink subband of the component carrier bandwidth (e.g., one or both of the downlink subbands 422 and 426) to transmit to the UE 404. At the same time (while transmitting downlink), the network node 402 may use the uplink beam 414 and the uplink subband of the component carrier bandwidth (e.g., uplink subband 424) to receive from the UE 406.

[0078] Due to the illustrated SBFD operation, downlink transmissions by network node 402 via downlink beam 412 may cause self-interference to uplink reception by network node 402 via uplink beam 414. Additionally, clutter reflections (e.g., due to obstacles 408 in the environment) may also interfere with SBFD operation.

[0079] SBFD operation may be associated with various advantages. For example, an increased uplink duty cycle may result in reduced latency (e.g., downlink signals may be received in the original uplink time slot, thereby achieving latency savings) and / or improved uplink coverage. In addition, SBFD operation may enhance system capacity, resource utilization, and / or spectrum efficiency. Furthermore, SBFD operation may enable flexible and dynamic uplink / downlink resource adaptation according to uplink / downlink traffic in a robust manner.

[0080] In some configurations, a UE (e.g., UE 404 / 406) may be informed of the time and / or frequency locations of subbands that a network node (e.g., network node 402) may use for SBFD operations. In some configurations, resource allocation may be enhanced in symbols / time slots having subbands that a network node may use for SBFD operations.

[0081] Some aspects of the present disclosure may relate to CSI enhancement for SBFD operations. Figure 5 500 is an example diagram illustrating the transmission of CSI-RS associated with SBFD operation according to one or more aspects of the present disclosure. As shown, symbols / slots 502a-502c (i.e., 502a, 502b, and 502c) may be half-duplex symbols / slots. Specifically, symbols / slots 502a-502c may be downlink symbols / slots. In addition, symbols / slots 502d-502f (i.e., 502d, 502e, and 502f) may be SBFD symbols / slots. Specifically, in symbols / slots 502d-502f, subbands 504 and 508 may be downlink subbands, and subband 506 may be uplink subbands. The two downlink subbands 504 and 508 may be non-contiguous downlink subbands because the two downlink subbands 504 and 508 are separated by uplink subband 506. The CSI-RS may be sent and measured in a SBFD symbol / slot (specifically, in a downlink subband) or in a half-duplex downlink symbol / slot. As shown, the CSI-RS may be sent and measured in half-duplex downlink symbols / slots 502a-502c and in non-contiguous downlink subbands 504 and 508 within SBFD symbols / slots 502d-502f. Some configurations may involve techniques for enhancing CSI measurement accuracy for non-contiguous downlink subbands (e.g., downlink subbands on the bandwidth side separated by uplink subbands) in SBFD symbols / slots.

[0082] In one or more configurations, a network node (e.g., network node 402) may transmit CSI-RS at the same total transmit power across half-duplex downlink symbols / slots (e.g., symbols / slots 502a-502c) and SBFD symbols / slots (e.g., symbols / slots 502d-502f). Since SBFD symbols / slots may include uplink subbands in which the network node may not transmit any power, on a per-CSI subband basis, the network node may increase (boost) the transmit power of the CSI-RS on the downlink subbands in the SBFD symbols / slots (e.g., downlink subbands 504 and 508 in SBFD symbols / slots 502d-502f) while keeping the total transmit power the same across the entire bandwidth (e.g., component carrier bandwidth). For example, on a per-CSI subband basis, the network node may increase the transmit power of the CSI-RS on the downlink subbands in the SBFD symbols / slots by xdB.

[0083] Since the transmit power of the CSI-RS on the downlink subband in the SBFD symbol / time slot may be increased, the UE may increase (boost) the measured CSI metric accordingly. For example, if the network node increases the transmit power of the CSI-RS on the downlink subband in the SBFD symbol / time slot by xdB, and the measured CSI metric is the reference signal received power (RSRP) (e.g., layer 1 RSRP (L1-RSRP)), the UE may also increase the measured RSRP by xdB. In other configurations, the UE may perform similar adaptation on other CSI metrics such as received signal strength indicator (RSSI), CQI, or path loss RS.

[0084] In one or more configurations, for SBFD symbols / slots, the UE may measure CSI-RS sent in downlink subbands (e.g., non-contiguous downlink subbands). In one configuration, if the UE is configured to transmit a per-CSI subband CSI report, the CSI subbands in the per-CSI subband CSI report may be configurable, and at least some of the CSI subbands may each be narrower than each downlink subband in the SBFD symbol / slot used for SBFD operation (e.g., narrower CSI subbands may help identify whether edge RBs / subcarriers in the SBFD subbands are subject to severe interference, because the edge RBs / subcarriers in the SBFD subbands may be covered by separate CSI subbands for separate CSI reports). Therefore, when generating per-CSI subband CSI metrics, the UE may skip reporting on subbands associated with uplinks used for SBFD operation (e.g., uplink subbands 506 located in the middle of the bandwidth). Therefore, the reported CSI measurements associated with SBFD operation may be more accurate.

[0085] In one configuration, if the UE is configured to transmit wideband CSI reports, the UE may skip processing of CSI on an uplink subband (e.g., uplink subband 506) used for SBFD operation when calculating wideband CSI metrics (e.g., the UE may avoid receiving and / or avoid measuring CSI-RS in the uplink subband). As a result, the reported CSI measurements associated with SBFD operation may be more accurate.

[0086] Figure 6 600 is a diagram of an example communication flow of a wireless communication method. UE 602 may correspond to Figure 4 UE 404 in . UE 602′ may correspond to Figure 4 UE 406 in. In addition, the network node 604 may correspond to Figure 44. At 606, the network node 604 may send an RS to the UE 602 in the symbol or the time slot. Thus, the UE 602 may receive the RS from the network node 604 in the symbol or the time slot. The RS may extend over a plurality of downlink subbands (e.g., downlink subbands 422 / 426 / 504 / 508) having non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands (e.g., downlink subbands 422 / 426 or 504 / 508) of the plurality of downlink subbands may be separated by an uplink subband (e.g., uplink subbands 424 or 506) in the symbol or the time slot.

[0087] Concurrently with 606, at 614, network node 604 may receive uplink communications from UE 602' (eg, over an uplink subband (eg, uplink subband 424 or 506) in a symbol or slot).

[0088] In one configuration, the RS at 606 may include a CSI-RS.

[0089] In one configuration, the network node 604 may increase the transmit power of the RS on the downlink subband compared to the transmit power used in the half-duplex downlink time slot on a per CSI subband basis. In other words, the network node 604 may transmit the RS in at least one downlink subband of the plurality of downlink subbands in the symbol or the time slot at a first (increased) transmit power. The first transmit power may be greater than a second transmit power associated with a second RS in a second symbol or a second time slot (e.g., a half-duplex downlink time slot). The second symbol or the second time slot may be associated with half-duplex operation at the network node (e.g., legacy half-duplex operation). The second symbol or the second time slot may not include an uplink subband.

[0090] In one configuration, the RS at 606 may be sent and received in the symbol or the time slot via a first preconfigured CSI-RS resource. The first preconfigured CSI-RS resource may be associated with the sub-band full-duplex operation at the network node 604. The second RS may be sent and received in the second symbol or the second time slot via a second preconfigured CSI-RS resource. The second preconfigured CSI-RS resource may be associated with the half-duplex operation at the network node 604.

[0091] At 608, UE 602 may measure the RS from network node 604 in the symbol or the time slot.

[0092] At 610, the UE 602 may generate at least one CSI metric based on the measurement of the RS at 608. Examples of the CSI metric may include SRS-RSRP or CLI-RSSI.

[0093] In one or more configurations, the at least one CSI metric may include at least one of RSRP, RSSI, CQI, or path loss RS.

[0094] In one configuration, where the network node 604 increases the transmit power of the RS on a downlink subband on a per-CSI subband basis, the UE 602 may further generate the at least one CSI metric based on a first (increased) transmit power associated with the RS in at least one of the multiple downlink subbands in the symbol or the time slot.

[0095] At 612, the UE 602 may send a CSI report based on the at least one CSI metric to the network node 604. Thus, the network node 604 may receive the CSI report from the UE 602 based on the at least one CSI metric.

[0096] In one configuration, where the CSI report includes a per CSI subband CSI report (i.e., the UE 602 is configured to transmit a per CSI subband CSI report), the per CSI subband CSI report may be associated with skipping the uplink subband associated with full-duplex operation of the subband at the network node.

[0097] In one configuration, where the CSI report comprises a wideband CSI report (ie, the UE 602 is configured to transmit a wideband CSI report), the wideband CSI report may be based on avoiding, by the UE 602, processing of CSI on the uplink subband.

[0098] Figure 7 700 is a flowchart of a wireless communication method. The method may be performed by a UE (e.g., UE 104 / 350 / 404 / 602; device 1004). At 702, the UE may measure an RS from a network node in a symbol or a time slot. The RS may extend over a plurality of downlink subbands, the plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. For example, 702 may be performed by Fig.10 Component 198 in the implementation. Figure 6 At 608, UE 602 may measure the RS from network node 604 in a symbol or time slot.

[0099] At 704, the UE may generate at least one CSI metric based on the measurement of the RS. For example, 704 may be performed by Fig.10 Component 198 in the implementation. Figure 6 At 610, the UE 602 may generate at least one CSI metric based on the measurement of the RS at 608.

[0100] Figure 8 800 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104 / 350 / 404 / 602; device 1004). At 804, the UE may measure an RS from a network node in a symbol or a time slot. The RS may extend over a plurality of downlink subbands, the plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. For example, 804 may be performed by Fig.10 Component 198 in the implementation. Figure 6 At 608, UE 602 may measure the RS from network node 604 in a symbol or time slot.

[0101] At 806, the UE may generate at least one CSI metric based on the measurement of the RS. For example, 806 may be performed by Fig.10 Component 198 in the implementation. Figure 6 At 610, the UE 602 may generate at least one CSI metric based on the measurement of the RS at 608.

[0102] In one configuration, reference Figure 6 , the RS at 606 may include a CSI-RS.

[0103] In one configuration, the at least one CSI metric may include at least one of RSRP, RSSI, CQI, or path loss RS.

[0104] In one configuration, reference Figure 6 , the at least one CSI metric may be further generated at 610 based on a first transmit power associated with the RS at 606 in at least one downlink subband in the plurality of downlink subbands in the symbol or the time slot. The first transmit power associated with the RS at 606 in the at least one downlink subband in the symbol or the time slot may be greater than a second transmit power associated with a second RS in a second symbol or a second time slot. The second symbol or the second time slot may be associated with half-duplex operation at the network node. The second symbol or the second time slot may not include an uplink subband.

[0105] In one configuration, reference Figure 6 , the RS at 606 may be received in the symbol or the time slot via a first preconfigured CSI-RS resource. The first preconfigured CSI-RS resource may be associated with the subband full-duplex operation at the network node 604. The second RS may be received in the second symbol or the second time slot via a second preconfigured CSI-RS resource. The second preconfigured CSI-RS resource may be associated with the half-duplex operation at the network node 604.

[0106] In one configuration, at 808, the UE may send a CSI report to the network node based on the at least one CSI metric. For example, 808 may be performed by Fig.10 Component 198 in the implementation. Figure 6 At 612, the UE 602 may send a CSI report to the network node 604 based on the at least one CSI metric.

[0107] In one configuration, reference Figure 6 The CSI report at 612 may include a per CSI subband CSI report. The per CSI subband CSI report may be associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

[0108] In one configuration, reference Figure 6 The CSI report at 612 may include a wideband CSI report. The wideband CSI report may be based on avoiding processing CSI on the uplink subband associated with full-duplex operation of the subband at the network node.

[0109] In one configuration, at 802, the UE may receive the RS from the network node in the symbol or the time slot. The RS may be measured based on being received in the symbol or the time slot. For example, 802 may be Fig.10 Component 198 in the implementation. Figure 6 At 606, the UE 602 may receive the RS from the network node 604 in the symbol or the time slot.

[0110] Fig. 9900 is a flowchart of a wireless communication method. The method may be performed by a base station / network node (e.g., base station 102 / 310; network node 402 / 604; network entity 1002). At 902, the network node may send an RS to a UE in a symbol or a time slot. The RS may extend over multiple downlink subbands, and the multiple downlink subbands have non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands of the multiple downlink subbands may be separated by an uplink subband in the symbol or the time slot. The multiple downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. For example, 902 may be performed by Fig.11 Component 199 in the reference Figure 6 At 606, the network node 604 may send an RS to the UE 602 in a symbol or time slot.

[0111] At 904, the network node may receive a CSI report from the UE based on the RS and at least one CSI metric. For example, 904 may be performed by Fig.11 Component 199 in the reference Figure 6 At 612, the network node 604 may receive a CSI report from the UE 602 based on the RS at 606 and at least one CSI metric.

[0112] In one configuration, reference Figure 6 , the RS at 606 may include a CSI-RS.

[0113] In one configuration, the at least one CSI metric may include at least one of RSRP, RSSI, CQI, or path loss RS.

[0114] In one configuration, reference Figure 6 , the RS at 606 may be transmitted in at least one downlink subband of the plurality of downlink subbands in the symbol or the time slot at a first transmit power. The first transmit power associated with the RS at 606 in the at least one downlink subband in the symbol or the time slot may be greater than a second transmit power associated with a second RS in a second symbol or a second time slot. The second symbol or the second time slot may be associated with half-duplex operation at the network node. The second symbol or the second time slot may not include an uplink subband. The at least one CSI metric may be based on the RS at 606 and the first transmit power.

[0115] In one configuration, reference Figure 6, the network node 604 may configure a first CSI-RS resource and a second CSI-RS resource. The RS at 606 may be sent by the network node 604 in the symbol or the time slot via the first (preconfigured) CSI-RS resource. The first (preconfigured) CSI-RS resource may be associated with the sub-band full-duplex operation at the network node 604. The second RS may be sent by the network node 604 in the second symbol or the second time slot via the second (preconfigured) CSI-RS resource. The second (preconfigured) CSI-RS resource may be associated with the half-duplex operation at the network node 604.

[0116] In one configuration, reference Figure 6 The CSI report at 612 may include a per CSI subband CSI report. The per CSI subband CSI report may be associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

[0117] In one configuration, reference Figure 6 The CSI report at 612 may include a wideband CSI report. The wideband CSI report may be based on avoiding processing CSI on the uplink subband associated with full-duplex operation of the subband at the network node.

[0118] Fig.101000 is a diagram illustrating an example of a hardware implementation for an apparatus 1004. The apparatus 1004 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1004 may include a cellular baseband processor 1024 (also referred to as a modem) coupled to one or more transceivers 1022 (e.g., a cellular RF transceiver). The cellular baseband processor 1024 may include on-chip memory 1024'. In some aspects, the apparatus 1004 may also include one or more subscriber identity module (SIM) cards 1020 and an application processor 1006 coupled to a secure digital (SD) card 1008 and a screen 1010. The application processor 1006 may include on-chip memory 1006'. In some aspects, the device 1004 may also include a Bluetooth module 1012, a WLAN module 1014, an SPS module 1016 (e.g., a GNSS module), one or more sensor modules 1018 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1026, a power source 1030, and / or a camera 1032. The Bluetooth module 1012, the WLAN module 1014, and the SPS module 1016 may include an on-chip transceiver (TRX) (or in some cases, only a receiver (RX)). The Bluetooth module 1012, the WLAN module 1014, and the SPS module 1016 may include their own dedicated antennas and / or communicate using an antenna 1080. The cellular baseband processor 1024 communicates with the UE 104 and / or with the RU associated with the network entity 1002 through the transceiver 1022 via one or more antennas 1080. The cellular baseband processor 1024 and the application processor 1006 may each include a computer-readable medium / memory 1024', 1006', respectively. The additional memory module 1026 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1024', 1006', 1026 may be non-transitory. The cellular baseband processor 1024 and the application processor 1006 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the cellular baseband processor 1024 / application processor 1006, enables the cellular baseband processor 1024 / application processor 1006 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the cellular baseband processor 1024 / application processor 1006 when executing the software.The cellular baseband processor 1024 / application processor 1006 may be a component of the UE 350 and may include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the device 1004 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1024 and / or the application processor 1006, and in another configuration, the device 1004 may be the entire UE (e.g., see. Figure 3 350) and includes additional modules of device 1004.

[0119] As discussed above, component 198 is configured to measure RS from a network node in a symbol or a time slot. The RS may extend over a plurality of downlink subbands having non-continuous subcarriers in the symbol or the time slot. At least two of the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at a network node. Component 198 is configured to generate at least one CSI metric based on the measurement of the RS. Component 198 may be within a cellular baseband processor 1024, an application processor 1006, or both a cellular baseband processor 1024 and an application processor 1006. Component 198 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium so as to be implemented by one or more processors, or some combination thereof. As shown, device 1004 may include a variety of components configured for various functions. In one configuration, the device 1004 (and specifically the cellular baseband processor 1024 and / or the application processor 1006) includes a component for measuring an RS from a network node in a symbol or a time slot. The RS may extend over multiple downlink subbands, and the multiple downlink subbands have non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands in the multiple downlink subbands may be separated by an uplink subband in the symbol or the time slot. The multiple downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The device 1004 (and specifically the cellular baseband processor 1024 and / or the application processor 1006) includes a component for generating at least one CSI metric based on the measurement of the RS.

[0120] In one configuration, the RS may include a CSI-RS. In one configuration, the at least one CSI metric may include at least one of RSRP, RSSI, CQI, or path loss RS. In one configuration, the at least one CSI metric may be further generated based on a first transmit power associated with the RS in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot. The first transmit power associated with the RS in at least one downlink subband in the symbol or the time slot may be greater than a second transmit power associated with the second RS in the second symbol or the second time slot. The second symbol or the second time slot may be associated with half-duplex operation at the network node. The second symbol or the second time slot may not include an uplink subband. In one configuration, the RS may be received in the symbol or the time slot via a first preconfigured CSI-RS resource. The first preconfigured CSI-RS resource may be associated with full-duplex operation of the subband at the network node. The second RS may be received in the second symbol or the second time slot via a second preconfigured CSI-RS resource. The second preconfigured CSI-RS resource may be associated with the half-duplex operation at the network node. In one configuration, the device 1004 (and specifically the cellular baseband processor 1024 and / or the application processor 1006) includes a component for sending a CSI report to the network node based on the at least one CSI metric. In one configuration, the CSI report may include a per-CSI subband CSI report. The per-CSI subband CSI report may be associated with skipping the uplink subband associated with the subband full-duplex operation at the network node. In one configuration, the CSI report may include a wideband CSI report. The wideband CSI report may be based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node. In one configuration, the device 1004 (and specifically the cellular baseband processor 1024 and / or the application processor 1006) includes a component for receiving the RS from the network node in the symbol or the time slot. The RS may be measured based on being received in the symbol or the time slot.

[0121] These means may be components 198 of the apparatus 1004 configured to perform the functions recited by these means. As described above, the apparatus 1004 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, these means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by these means.

[0122] Fig.111100 is a diagram illustrating an example of a hardware implementation for a network entity 1102. The network entity 1102 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1102 may include at least one of a CU 1110, a DU 1130, or a RU 1140. For example, depending on the layer functionality handled by the component 199, the network entity 1102 may include: a CU 1110; both a CU 1110 and a DU 1130; each of the CU 1110, the DU 1130, and the RU 1140; the DU 1130; both a DU 1130 and a RU 1140; or a RU 1140. The CU 1110 may include a CU processor 1112. The CU processor 1112 may include an on-chip memory 1112'. In some aspects, the CU 1110 may also include an additional memory module 1114 and a communication interface 1118. CU 1110 communicates with DU 1130 via a midhaul link, such as an F1 interface. DU 1130 may include a DU processor 1132. DU processor 1132 may include on-chip memory 1132'. In some aspects, DU 1130 may also include an additional memory module 1134 and a communication interface 1138. DU 1130 communicates with RU 1140 via a fronthaul link. RU 1140 may include a RU processor 1142. RU processor 1142 may include on-chip memory 1142'. In some aspects, RU 1140 may also include an additional memory module 1144, one or more transceivers 1146, an antenna 1180, and a communication interface 1148. RU 1140 communicates with UE 104. On-chip memory 1112', 1132', 1142' and additional memory modules 1114, 1134, 1144 may each be considered a computer-readable medium / memory. Each computer readable medium / memory may be non-transitory. Each of the processors 1112, 1132, 1142 is responsible for general processing, including executing software stored on the computer readable medium / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0123] As discussed above, component 199 is configured to send RS to UE in a symbol or a time slot. The RS may extend over multiple downlink subbands, and the multiple downlink subbands have non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands in the multiple downlink subbands may be separated by an uplink subband in the symbol or the time slot. The multiple downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. Component 199 is configured to receive a CSI report from the UE based on the RS and at least one CSI metric. Component 199 may be within one or more processors of one or more of CU 1110, DU1130, and RU 1140. Component 199 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium so as to be implemented by one or more processors, or some combination thereof. Network entity 1102 may include a variety of components configured for various functions. In one configuration, the network entity 1102 includes means for sending an RS to a UE in a symbol or a time slot. The RS may extend over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands in the plurality of downlink subbands may be separated by an uplink subband in the symbol or the time slot. The plurality of downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The network entity 1102 includes means for receiving a CSI report from the UE based on the RS and at least one CSI metric.

[0124] In one configuration, the RS may include a CSI-RS. In one configuration, the at least one CSI metric may include at least one of RSRP, RSSI, CQI, or path loss RS. In one configuration, the RS may be transmitted in at least one downlink subband of the plurality of downlink subbands in the symbol or the time slot at a first transmit power. The first transmit power associated with the RS in the at least one downlink subband in the symbol or the time slot may be greater than the second transmit power associated with the second RS in the second symbol or the second time slot. The second symbol or the second time slot may be associated with half-duplex operation at the network node. The second symbol or the second time slot may not include an uplink subband. The at least one CSI metric may be based on the RS and the first transmit power. In one configuration, the network entity 1102 includes a component for configuring a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource may be associated with full-duplex operation of the subband at the network node. The second CSI-RS resource may be associated with half-duplex operation at the network node. The RS may be sent in the symbol or the time slot via the first CSI-RS resource. The second RS may be sent in the second symbol or the second time slot via the second CSI-RS resource. In one configuration, the CSI report may include a per-CSI subband CSI report. The per-CSI subband CSI report may be associated with skipping the uplink subband associated with the subband full-duplex operation at the network node. In one configuration, the CSI report may include a wideband CSI report. The wideband CSI report may be based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node.

[0125] These components may be components 199 of the network entity 1102 configured to perform the functions recited by these components. As described above, the network entity 1102 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, these components may be the TX processor 316, the RX processor 370, and / or the controller / processor 375 configured to perform the functions recited by these components.

[0126] Return to reference Figures 4 to 11, the network node may send an RS to the UE in a symbol or a time slot. The RS may extend over multiple downlink subbands, and the multiple downlink subbands have non-contiguous subcarriers in the symbol or the time slot. At least two downlink subbands in the multiple downlink subbands may be separated by an uplink subband in the symbol or the time slot. The multiple downlink subbands and the uplink subband may be associated with subband full-duplex operation at the network node. The UE may measure the RS from the network node in the symbol or the time slot. The UE may generate at least one CSI metric based on the measurement of the RS. The network node may receive a CSI report from the UE based on the RS and the at least one CSI metric. Therefore, the accuracy of the reported CSI measurement associated with SBFD operation may be improved.

[0127] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart may be rearranged based on design preferences. In addition, some blocks may be combined or omitted. The attached method claims provide the elements of the various blocks in a sample order, but are not limited to the specific order or hierarchy provided.

[0128] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, reference to an element in the singular form does not mean "one and only one", but "one or more". Terms such as "if", "when" and "while" do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ...", do not mean an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply imply that if the conditions are met, the action will occur, but no specific or immediate time limit is required for the occurrence of the action. The word "exemplary" is used herein to mean "used as an example, instance or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having advantages over other aspects. Unless otherwise specified, 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, which may include multiple A, multiple B, or multiple 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 only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, the data may be directly received / sent between the first device and the second device, or indirectly received / sent between the first device and the second device through a collection of devices. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device" cannot replace the word "component". Therefore, no claim element will be understood as a component plus function unless the element is explicitly stated using the phrase "component for..."

[0129] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0130] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0131] Aspect 1 is a method for performing wireless communication at a UE, the method comprising: measuring an RS from a network node in a symbol or a time slot, the RS extending over multiple downlink subbands, the multiple downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two downlink subbands of the multiple downlink subbands are separated by an uplink subband in the symbol or the time slot, and the multiple downlink subbands and the uplink subband are associated with subband full-duplex operation at the network node; and generating at least one CSI metric based on the measurement of the RS.

[0132] Aspect 2 is a method according to aspect 1, wherein the RS comprises a CSI-RS.

[0133] Aspect 3 is a method according to any one of aspects 1 and 2, wherein the at least one CSI metric comprises at least one of RSRP, RSSI, CQI or path loss RS.

[0134] Aspect 4 is a method according to any one of Aspects 1 to 3, wherein the at least one CSI metric is further generated based on a first transmit power associated with the RS in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot, wherein the first transmit power associated with the RS in at least one downlink subband in the symbol or the time slot is greater than a second transmit power associated with a second RS in a second symbol or a second time slot, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, and wherein the second symbol or the second time slot does not include an uplink subband.

[0135] Aspect 5 is a method according to aspect 4, wherein the RS is received in the symbol or the time slot via a first preconfigured CSI-RS resource, the first preconfigured CSI-RS resource is associated with the subband full-duplex operation at the network node, the second RS is received in the second symbol or the second time slot via a second preconfigured CSI-RS resource, and the second preconfigured CSI-RS resource is associated with the half-duplex operation at the network node.

[0136] Aspect 6 is a method according to any one of aspects 1 to 5, the method further comprising: sending a CSI report to the network node based on the at least one CSI metric.

[0137] Aspect 7 is a method according to aspect 6, wherein the CSI report includes a per-CSI subband CSI report, and the per-CSI subband CSI report is associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

[0138] Aspect 8 is a method according to aspect 6, wherein the CSI report comprises a wideband CSI report, and the wideband CSI report is based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node.

[0139] Aspect 9 is a method according to any one of aspects 1 to 8, the method further comprising: receiving the RS from the network node in the symbol or the time slot, wherein the RS is measured based on being received in the symbol or the time slot.

[0140] Aspect 10 is a method for performing wireless communication at a network node, the method comprising: sending an RS to a UE in a symbol or a time slot, the RS extending over multiple downlink subbands, the multiple downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two of the multiple downlink subbands are separated by an uplink subband in the symbol or the time slot, and the multiple downlink subbands and the uplink subbands are associated with subband full-duplex operation at the network node; and receiving a CSI report from the UE based on the RS and at least one CSI measurement.

[0141] Aspect 11 is a method according to aspect 10, wherein the RS comprises a CSI-RS.

[0142] Aspect 12 is a method according to any one of aspects 10 and 11, wherein the at least one CSI metric comprises at least one of RSRP, RSSI, CQI, or path loss RS.

[0143] Aspect 13 is a method according to any one of Aspects 10 to 12, wherein the RS is transmitted in at least one of the multiple downlink subbands in the symbol or the time slot with a first transmission power, wherein the first transmission power associated with the RS in the at least one downlink subband in the symbol or the time slot is greater than the second transmission power associated with the second RS in the second symbol or the second time slot, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, wherein the second symbol or the second time slot does not include an uplink subband, and wherein the at least one CSI metric is based on the RS and the first transmission power.

[0144] Aspect 14 is a method according to aspect 13, the method further comprising: configuring a first CSI-RS resource and a second CSI-RS resource, wherein the first CSI-RS resource is associated with the subband full-duplex operation at the network node, and the second CSI-RS resource is associated with the half-duplex operation at the network node, and wherein the RS is sent in the symbol or the time slot via the first CSI-RS resource, and the second RS is sent in the second symbol or the second time slot via the second CSI-RS resource.

[0145] Aspect 15 is a method according to any one of aspects 10 to 14, wherein the CSI report includes a per-CSI subband CSI report, and the per-CSI subband CSI report is associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

[0146] Aspect 16 is a method according to any one of aspects 10 to 15, wherein the CSI report comprises a wideband CSI report, and the wideband CSI report is based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node.

[0147] Aspect 17 is an apparatus for wireless communication, the apparatus comprising at least one processor, the at least one processor being coupled to a memory, and the at least one processor being configured to implement a method as described in any one of Aspects 1 to 16 based at least in part on information stored in the memory.

[0148] Aspect 18 may be combined with Aspect 17, and further comprises: a transceiver coupled to the at least one processor.

[0149] Aspect 19 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 16.

[0150] Aspect 20 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 16.

[0151] Various aspects have been described herein. These and other aspects are within the scope of the following claims.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: measuring a reference signal (RS) from a network node in a symbol or a time slot, the RS extending over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two downlink subbands of the plurality of downlink subbands are separated by an uplink subband in the symbol or the time slot, and the plurality of downlink subbands and the uplink subband are associated with subband full-duplex operation at the network node; as well as At least one channel state information (CSI) metric is generated based on the measurement of the RS. The apparatus according to claim 1 , wherein the RS comprises a CSI-RS.

3. The apparatus of claim 1 , wherein the at least one CSI metric comprises at least one of a reference signal received power (RSRP), a reference signal strength indicator (RSSI), a channel quality indicator (CQI), or a path loss reference signal (RS).

4. An apparatus according to claim 1, wherein the at least one CSI metric is further generated based on a first transmit power associated with the RS in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot, wherein the first transmit power associated with the RS in the at least one downlink subband in the symbol or the time slot is greater than a second transmit power associated with a second RS in a second symbol or a second time slot, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, and wherein the second symbol or the second time slot does not include an uplink subband.

5. The apparatus of claim 4 , wherein the RS is received in the symbol or the time slot via a first preconfigured CSI-RS resource, the first preconfigured CSI-RS resource is associated with the subband full-duplex operation at the network node, the second RS is received in the second symbol or the second time slot via a second preconfigured CSI-RS resource, and the second preconfigured CSI-RS resource is associated with the half-duplex operation at the network node.

6. The apparatus of claim 1 , wherein the at least one processor is further configured to: A CSI report is sent to the network node based on the at least one CSI metric. 7 . The apparatus of claim 6 , wherein the CSI report comprises a per-CSI subband CSI report, and the per-CSI subband CSI report is associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

8. The apparatus of claim 6, wherein the CSI report comprises a wideband CSI report, and the wideband CSI report is based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node.

9. The apparatus of claim 1 , wherein the at least one processor is further configured to: The RS is received from the network node in the symbol or the time slot, wherein the RS is measured based on being received in the symbol or the time slot.

10. The apparatus of claim 9, further comprising a transceiver coupled to the at least one processor, wherein the at least one processor is configured to receive the RS via the transceiver.

11. A method of wireless communication at a user equipment (UE), the method comprising: measuring a reference signal (RS) from a network node in a symbol or a time slot, the RS extending over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two downlink subbands of the plurality of downlink subbands are separated by an uplink subband in the symbol or the time slot, and the plurality of downlink subbands and the uplink subband are associated with subband full-duplex operation at the network node; as well as At least one channel state information (CSI) metric is generated based on the measurements of the RS. The method according to claim 11 , wherein the RS comprises a CSI-RS.

13. The method of claim 11, wherein the at least one CSI metric comprises at least one of a reference signal received power (RSRP), a reference signal strength indicator (RSSI), a channel quality indicator (CQI), or a path loss reference signal (RS).

14. A method according to claim 11, wherein the at least one CSI metric is further generated based on a first transmit power associated with the RS in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot, wherein the first transmit power associated with the RS in at least one downlink subband in the symbol or the time slot is greater than a second transmit power associated with a second RS in a second symbol or a second time slot, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, and wherein the second symbol or the second time slot does not include an uplink subband.

15. The method of claim 14, wherein the RS is received in the symbol or the time slot via a first preconfigured CSI-RS resource, the first preconfigured CSI-RS resource is associated with the subband full-duplex operation at the network node, the second RS is received in the second symbol or the second time slot via a second preconfigured CSI-RS resource, and the second preconfigured CSI-RS resource is associated with the half-duplex operation at the network node.

16. The method according to claim 11, further comprising: A CSI report is sent to the network node based on the at least one CSI metric.

17. The method of claim 16, wherein the CSI report comprises a per CSI subband CSI report, and the per CSI subband CSI report is associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

18. An apparatus for wireless communication at a network node, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: transmitting a reference signal (RS) to a user equipment (UE) in a symbol or a time slot, the RS extending over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two downlink subbands of the plurality of downlink subbands are separated by an uplink subband in the symbol or the time slot, and the plurality of downlink subbands and the uplink subband are associated with sub-band full-duplex operation at the network node; as well as A channel state information (CSI) report is received from the UE based on the RS and at least one CSI metric. The apparatus of claim 18 , wherein the RS comprises a CSI-RS.

20. The apparatus of claim 18, wherein the at least one CSI metric comprises at least one of a reference signal received power (RSRP), a reference signal strength indicator (RSSI), a channel quality indicator (CQI), or a path loss reference signal (RS).

21. An apparatus according to claim 18, wherein the RS is transmitted in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot with a first transmission power, wherein the first transmission power associated with the RS in the at least one downlink subband in the symbol or the time slot is greater than a second transmission power associated with a second RS in a second symbol or a second time slot, wherein the second symbol or the second time slot does not include an uplink subband, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, and wherein the at least one CSI metric is based on the RS and the first transmission power.

22. The apparatus of claim 21 , wherein the at least one processor is further configured to: A first CSI-RS resource and a second CSI-RS resource are configured, wherein the first CSI-RS resource is associated with the subband full-duplex operation at the network node, and the second CSI-RS resource is associated with the half-duplex operation at the network node, and wherein the RS is sent in the symbol or the time slot via the first CSI-RS resource, and the second RS is sent in the second symbol or the second time slot via the second CSI-RS resource.

23. The apparatus of claim 18, wherein the CSI report comprises a per CSI subband CSI report, and the per CSI subband CSI report is associated with skipping the uplink subband associated with the subband full-duplex operation at the network node.

24. The apparatus of claim 18, wherein the CSI report comprises a wideband CSI report, and the wideband CSI report is based on avoiding processing CSI on the uplink subband associated with the subband full-duplex operation at the network node.

25. The apparatus of claim 18, further comprising a transceiver coupled to the at least one processor, wherein the at least one processor is configured to transmit the RS via the transceiver.

26. A method for wireless communication at a network node, the method comprising: transmitting a reference signal (RS) to a user equipment (UE) in a symbol or a time slot, the RS extending over a plurality of downlink subbands having non-contiguous subcarriers in the symbol or the time slot, wherein at least two downlink subbands of the plurality of downlink subbands are separated by an uplink subband in the symbol or the time slot, and the plurality of downlink subbands and the uplink subband are associated with sub-band full-duplex operation at the network node; as well as A channel state information (CSI) report is received from the UE based on the RS and at least one CSI metric. The method of claim 26 , wherein the RS comprises a CSI-RS.

28. The method of claim 26, wherein the at least one CSI metric comprises at least one of a reference signal received power (RSRP), a reference signal strength indicator (RSSI), a channel quality indicator (CQI), or a path loss reference signal (RS).

29. A method according to claim 26, wherein the RS is transmitted in at least one downlink subband of the multiple downlink subbands in the symbol or the time slot with a first transmission power, wherein the first transmission power associated with the RS in the at least one downlink subband in the symbol or the time slot is greater than a second transmission power associated with the second RS in a second symbol or a second time slot, wherein the second symbol or the second time slot does not include an uplink subband, wherein the second symbol or the second time slot is associated with half-duplex operation at the network node, and wherein the at least one CSI metric is based on the RS and the first transmission power.

30. The method according to claim 29, further comprising: A first CSI-RS resource and a second CSI-RS resource are configured, wherein the first CSI-RS resource is associated with the subband full-duplex operation at the network node, and the second CSI-RS resource is associated with the half-duplex operation at the network node, and wherein the RS is sent in the symbol or the time slot via the first CSI-RS resource, and the second RS is sent in the second symbol or the second time slot via the second CSI-RS resource.

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