Signaling for indicating flexible uplink or downlink subband

Abstract

A UE receives information indicating a set of slots or a set of symbols for a sub-band full duplex (SBFD) operation. The UE also receives a configuration of an SBFD format including at least a first sub-band for uplink communication and a second sub-band for downlink communication. The UE also receives an indication indicating that the UE updates the SBFD format for at least a subset of the set of slots or the set of symbols.

Description

[0001] Cross - Reference to Related Applications

[0002] This application claims the benefit of U.S. Non - Provisional Patent Application Serial No. 18 / 049,595, filed on October 25, 2022, entitled "SIGNALING TO INDICATE FLEXIBLE UPLINK OR DOWNLINK SUBBANDS", which is hereby incorporated by reference in its entirety. Technical Field

[0003] The present disclosure generally relates to communication systems, and more particularly to wireless communication including signaling associated with subbands for full - duplex communication. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology 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 the urban, national, regional, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the ongoing evolution of mobile broadband promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., related to the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine - type communication (mMTC), and ultra - reliable low - latency communication (URLLC). Some aspects of 5G NR may be based on the 4G Long - Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. Additionally, 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 review 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. It neither identifies key or critical 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 the more detailed description that is presented later.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a user equipment (UE) are provided. The apparatus may include: a memory; and at least one processor coupled to the memory and configured to: receive information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation; receive an SBFD format configuration including at least a first sub-band for uplink communication and a second sub-band for downlink communication; and receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols.

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a network node are provided. The apparatus may include: a memory; and at least one processor coupled to the memory and configured to: output information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation; output an SBFD format configuration including at least a first sub-band for uplink communication and a second sub-band for downlink communication; and output an indication to update the SBFD format for at least a subset of the set of time slots or the set of symbols.

[0009] To achieve the foregoing and related purposes, one or more aspects include the features described in detail below and particularly pointed out in the claims. The following description and the drawings set forth in detail some illustrative features of one or more aspects. However, these features are indicative of only some of the various ways in which the principles of the various aspects may 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 in accordance with various aspects of the present disclosure.

[0012] Figure 2B is a diagram illustrating an example of a downlink (DL) channel within a subframe in accordance with various aspects of the present disclosure.

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

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

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

[0016] Figure 4A 、 Figure 4B 、 Figure 4C and Figure 4D illustrate various modes of full-duplex communication.

[0017] Figure 5A illustrates an example of subband full-duplex (SBFD) resources.

[0018] Figure 5B illustrates an example of a device that uses portions of an antenna panel for full-duplex communication.

[0019] Figure 6A and Figure 6B is a diagram illustrating updating the SBFD format of a UL subband for DL reception according to various aspects of the present disclosure.

[0020] Figure 7A and Figure 7B is a diagram illustrating updating the SBFD format of a DL subband for UL transmission according to various aspects of the present disclosure.

[0021] Figure 8 is a call flow diagram illustrating a method of wireless communication according to various aspects of the present disclosure.

[0022] Figure 9 is a flowchart illustrating a method of wireless communication at a UE according to various aspects of the present disclosure.

[0023] Figure 10 is a flowchart illustrating a method of wireless communication at a network node according to various aspects of the present disclosure.

[0024] Figure 11 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or network entity.

[0025] Figure 12 is a diagram illustrating an example of a hardware implementation for an example network entity. Detailed Description

[0026] SBFD operations can implement dynamic scheduling of DL signal reception within the UL sub - band or dynamic scheduling of UL transmission outside the UL sub - band. However, such techniques have certain drawbacks. For example, extending the frequency sub - band in which the DL signal is received or the UL signal is transmitted involves the UE changing filters (e.g., low - pass filters) to support a wider range of frequency sub - bands. However, the UE may not be given enough time to change the filters via dynamic scheduling. In addition, since adjacent network nodes transmit and receive in the same frequency sub - band, cross - link interference (CLI) (e.g., in - sub - band CLI) may be introduced. Aspects presented herein provide methods and apparatuses for flexible sub - band signaling (e.g., dynamic or semi - static signaling) that update the SBFD format for time slots or symbols to improve the efficiency of wireless communication. In some aspects, a UE can receive information indicating a set of time slots or a set of symbols for sub - band full - duplex (SBFD) operation. The UE can also receive a configuration of the SBFD format that includes at least a first sub - band for uplink communication and a second sub - band for downlink communication. The UE can also receive an indication to update the SBFD format for at least a subset of the set of time slots or the set of symbols. The methods and apparatuses enable flexible utilization of transmission and reception resources in wireless communication according to actual operating requirements. In addition, the methods and apparatuses give the UE more time to retune (or change) the RF filter and give the network node time to coordinate with adjacent network nodes to reduce CLI. Therefore, the methods and apparatuses improve the efficiency of wireless communication and minimize CLI with adjacent network nodes.

[0027] The detailed description set forth below in connection with the accompanying drawings is a description of various configurations and does not represent the only configurations in which the concepts described herein can be practiced. For a thorough understanding of the various concepts, the detailed description includes specific details. However, the concepts can be practiced without these specific details. In some instances, well - known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0028] Certain aspects of a telecommunications system are presented with reference to various devices and methods. These devices and methods are described in the following detailed description and illustrated in the drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using either electronic hardware, computer software, or any combination thereof. Whether an element is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0029] By way of example, an element, or any portion of an element, or any combination of elements can be implemented as a "processing system" that 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, system on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system can execute software. Software should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof, regardless of whether it is referred to as software, firmware, middleware, microcode, hardware description language, or other terms.

[0030] Thus, in one or more example aspects, embodiments, and / or use cases, the described functionality can be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality can be stored or encoded on a computer-readable medium as one or more instructions or code. Computer-readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example, such computer-readable media can 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 capable of storing computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0031] Although aspects, embodiments, and / or use cases are described herein by way of illustration of some examples, additional or different aspects, embodiments, and / or use cases may arise in many different arrangements and scenarios. The aspects, embodiments, and / or use cases described herein may be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, aspects, embodiments, and / or use cases may be embodied via integrated chips and other non-module-component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase devices, medical devices, artificial intelligence (AI)-enabled devices, etc.). Although some examples may or may not be specifically targeted at use cases or applications, the examples described may have broad applicability. Aspects, embodiments, and / or use cases may range from chip-level or modular components to non-modular, non-chip-level embodiments and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the techniques herein. In some practical settings, devices incorporating the aspects and features described herein 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 includes 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 may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated components, or disaggregated components, end-user devices, etc., of various sizes, shapes, and configurations.

[0032] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in multiple ways. In a 5G NR system or network, network nodes, network entities, mobility elements of the network, radio access network (RAN) nodes, core network nodes, network elements, or network equipment (such as a base station (BS)) or one or more units (or one or more components) performing base station functions can be implemented in an aggregated or disaggregated architecture. For example, a BS (such as a Node B (NB), evolved NB (eNB), NR BS, 5G NB, access point (AP), transmit-receive point (TRP), or cell, etc.) can be implemented as an aggregated base station (also referred to as a stand-alone BS or monolithic BS) or a disaggregated base station.

[0033] A centralized base station can be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A split base station can be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU can be implemented within a RAN node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed across one or more other RAN nodes. A DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0034] Base station operation or network design can consider the aggregation characteristics of base station functionality. For example, a split base station can be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN, such as a network configuration initiated by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Splitting can include distributing functions across two or more units at various physical locations, as well as virtually distributing the functions of at least one unit, which can achieve flexibility in network design. The various units of a split base station or a split RAN architecture can be configured for wired or wireless communication with at least one other unit.

[0035] Figure 1 FIG. 100 is a diagram illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a split base station architecture. The split base station architecture can include one or more CUs 110, which can communicate directly with the core network 120 via a backhaul link, or indirectly with the core network 120 through one or more split 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 can communicate with one or more DUs 130 via a respective midhaul link, such as an F1 interface. The DU 130 can communicate with one or more RUs 140 via a respective fronthaul link. The RU 140 can communicate with a respective UE 104 via one or more radio frequency (RF) access links. In some embodiments, the UE 104 can be served simultaneously by multiple RUs 140.

[0036] Each unit (i.e., CU 110, DU 130, RU 140, and the near RT RIC 125, non-RT RIC 115, and SMO framework 105) may include one or more interfaces or be coupled to one or more interfaces that are configured to receive or transmit signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interfaces of these units may be configured to communicate with one or more of the other units via the transmission medium. For example, the units may include a wired interface that is configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium. Additionally, the units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) that is configured to receive and / or transmit signals to one or more of the other units via a wireless transmission medium.

[0037] In some aspects, the CU 110 may host one or more higher layer control functions. Such control functions may include Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Service Data Adaptation Protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by the CU 110. The CU 110 may be configured to handle user plane functionality (i.e., Central Unit - User Plane (CU-UP)), control plane functionality (i.e., Central Unit - Control Plane (CU-CP)), or a combination thereof. In some specific implementations, the 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 units may communicate bidirectionally with the CU-CP units via an interface (such as an E1 interface). As needed, the CU 110 may be implemented to communicate with the DU 130 for network control and signaling.

[0038] The 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, the DU 130 may host one or more of the Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and one or more high Physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation, and demodulation, etc.) at least partially according to a functional split (such as those defined by 3GPP). In some aspects, the 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 the DU 130 or with control functions hosted by the CU 110.

[0039] Lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RUs 140 controlled by the DU 130 may correspond to logical nodes that host 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, at least in part based on a functional split (such as a lower layer functional split). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communication with one or more UEs 104. In some embodiments, the real-time and non-real-time aspects of the control plane communication and user plane communication 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 CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0040] The SMO framework 105 may be configured to support the deployment and orchestration of RANs for both 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 operations and maintenance interface (such as the O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as the Open Cloud (O-Cloud) 190) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as the O2 interface). Such virtualized network elements may include, but are not limited to, the CU 110, DU 130, RU 140, and near RT RIC 125. In some embodiments, the SMO framework 105 may communicate with the hardware aspects of a 4G RAN (such as an Open eNB (O-eNB) 111) via the O1 interface. Additionally, in some embodiments, 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.

[0041] The non-RT RIC 115 can 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 can be coupled to or communicate with the near-RT RIC 125 (such as via the A1 interface). The near-RT RIC 125 can 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 the E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB to the near-RT RIC 125.

[0042] In some embodiments, to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 can receive parameters or external enrichment information from an external server. Such information can be utilized by the near-RT RIC 125 and can be received from non-network data sources or from network functions at the SMO framework 105 or at the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 can be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 can monitor long-term trends and patterns of performance and employ an AI / ML model to perform corrective actions via the SMO framework 105 (such as via reconfiguration of O1) or via creation of RAN management policies (such as A1 policies).

[0043] At least one of CU 110, DU 130, and RU 140 may be referred to as base station 102. Thus, base station 102 may include one or more of CU 110, DU 130, and RU 140 (each component is indicated by a dashed line to indicate that each component may or may not be included in base station 102). Base station 102 provides an access point to core network 120 for UE 104. Base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). 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. The 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 an uplink (UL) (also referred to as a reverse link) transmission from UE 104 to RU 140 and / or a downlink (DL) (also referred to as a forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may pass through one or more carriers. For each carrier allocated in carrier aggregation with a total of up to Yx MHz (x component carriers) for transmission in each direction, base station 102 / UE 104 may use a spectrum with a bandwidth of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.). These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL compared 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 carriers may be referred to as secondary cells (SCells).

[0044] Some UEs 104 may use device-to-device (D2D) communication link 158 to communicate with each other. D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through various 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.

[0045] The wireless communication system may further include a Wi-Fi AP 150 that communicates with the UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, e.g., in an unlicensed spectrum such as the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the UE 104 / AP 150 may perform a Clear Channel Assessment (CCA) before communication to determine whether the channel is available.

[0046] The electromagnetic spectrum is generally subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as Frequency Range Designation FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). Although a part of FR1 is greater than 6 GHz, in various documents and articles, FR1 is generally referred to (interchangeably) as the "sub-6 GHz" band. Regarding FR2, a similar naming issue sometimes occurs, which is generally (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 by the International Telecommunication Union (ITU) as the "millimeter wave" band.

[0047] The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified operating bands for these mid-band frequencies as Frequency Range Designation FR3 (7.125 GHz - 24.25 GHz). The bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to the mid-band frequencies. In addition, higher bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as Frequency Range Designation FR2-2 (52.6 GHz - 71 GHz), FR4 (71 GHz - 114.25 GHz), and FR5 (114.25 GHz - 300 GHz). Each of these higher bands falls within the EHF band.

[0048] Considering the above aspects, unless otherwise specifically stated, if the term "sub-6 GHz" etc. is used in this article, it may broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, if the term "millimeter wave" etc. is used in this article, it may broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR2-2, and / or FR5, or can be within the EHF band.

[0049] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may transmit a beamformed signal 182 to the UE 104 in one or more transmission directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more reception directions. The UE 104 may also transmit a beamformed signal 184 to the base station 102 in one or more transmission directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more reception directions. The base station 102 / UE 104 may perform beam training to determine the optimal reception direction and transmission direction for each of the base station 102 / UE 104. The transmission direction and reception direction of the base station 102 may be the same or may not be the same. The transmission direction and reception direction of the UE 104 may be the same or may not be the same.

[0050] The base station 102 may include and / or be referred to as a gNB, Node B, eNB, access point, transceiver base station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmission reception point (TRP), network node, network entity, 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 an RU, or as a disaggregated base station including one or more of the CU, DU, and / or RU. A set of base stations including disaggregated base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0051] The core network 120 may include an Access and Mobility Management Function (AMF) 161, a Session Management Function (SMF) 162, a User Plane Function (UPF) 163, a Unified Data Management (UDM) 164, one or more Location Servers 168, and other functional entities. The AMF 161 is a control node that processes signaling between the UE 104 and the core network 120. The AMF 161 supports registration management, connection management, mobility management, and other functions. The SMF 162 supports session management and other functions. The UPF 163 supports packet routing, packet forwarding, and other functions. The UDM 164 supports the generation of Authentication and Key Agreement (AKA) credentials, user 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, one or more Location Servers 168 may include one or more location / locationing 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. The GMLC 165 and LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE location information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to calculate the location of the UE 104. The NG-RAN may utilize one or more positioning methods to determine the location of the UE 104. Positioning the UE 104 may involve signal measurements, location estimation, and optional speed calculation based on these measurements. The signal measurements may be performed by the UE 104 and / or the serving base station 102. The measured signals may be based on a Satellite Positioning System (SPS) 170 (e.g., Global Navigation Satellite System (GNSS), Global Positioning System (GPS), Non-Terrestrial Network (NTN), or one or more of other satellite positioning / locationing systems), LTE signals, Wireless Local Area Network (WLAN) signals, Bluetooth signals, Terrestrial Beacon System (TBS), sensor-based information (e.g., atmospheric pressure sensor, motion sensor), 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).

[0052] Examples of the UE 104 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, 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, electricity meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other device with similar functionality. Some of the UEs in the UE 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). The UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, cell phone, user agent, mobile client, client, or some other suitable term. In some scenarios, the term UE may also apply to one or more companion devices, such as in a device cluster arrangement. One or more of these devices may access the network jointly and / or access the network individually.

[0053] Referring again to Figure 1 , in some aspects, the UE 104 may include an SBFD format update component 198 configured to receive information indicating a set of time slots or a set of symbols for SBFD operations. The SBFD format update component 198 may also be configured to receive a configuration of an SBFD format that includes at least a first subband for uplink communication and a second subband for downlink communication. The SBFD format update component 198 may also be configured to receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols. In some aspects, the base station 102 may include an SBFD format update component 199 configured to send or otherwise output information indicating a set of time slots or a set of symbols for SBFD operations. The SBFD format update component 199 may also be configured to send or otherwise output a configuration of an SBFD format that includes at least a first subband for uplink communication and a second subband for downlink communication. The SBFD format update component 199 may also be configured to send or otherwise output an indication to update the SBFD format for at least a subset of the set of time slots or the set of symbols. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar domains, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0054] Figure 2A FIG. 200 is a diagram illustrating an example of a first subframe within the 5G NR frame structure. Figure 2BFIG. 230 is an illustration showing an example of DL channels within a 5G NR subframe. Figure 2C FIG. 250 is an illustration showing an example of a second subframe within a 5G NR frame structure. Figure 2D FIG. 280 is an illustration showing an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplexing (FDD) (wherein for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to DL or UL), or can be time division duplexing (TDD) (wherein for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to both DL and UL). In Figure 2A 、 Figure 2C the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (where most are DL), where D is DL, U is UL, and F is flexibly usable between DL / UL, and subframe 3 is configured with slot format 1 (where all are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28 respectively, any particular subframe can be configured with any of the various available slot formats 0 - 61. Slot formats 0 and 1 are all - DL and all - UL respectively. The other slot formats 2 - 61 include a mixture of DL, UL, and flexible symbols. The UE is configured with the slot format by the received slot format indicator (SFI) (configured dynamically by DL control information (DCI) or semi - statically / statically by radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0055] Figures 2A to 2D An example of a frame structure is illustrated, and aspects of the present disclosure can be applicable to other wireless communication technologies that may have different frame structures and / or different channels. One frame (10 ms) can be divided into 10 equal - sized subframes (1 ms). Each subframe can include one or more slots. A subframe can also include mini - slots, which can include 7, 4, or 2 symbols. Each slot can include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For normal CP, each slot can include 14 symbols, and for extended CP, each slot can include 12 symbols. The symbols on the DL can be cyclic prefix orthogonal frequency division multiplexing (CP - OFDM) symbols. The symbols on the UL can be CP - OFDM symbols (for high - throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT - s - OFDM) symbols (for power - limited scenarios; limited to single - stream transmission). The number of slots within a subframe is based on the CP and the parameter set. The parameter set defines the subcarrier spacing (SCS) (see Table 1). The symbol length / duration scales with 1 / SCS.

[0056]

[0057]

[0058] Table 1: Parameter Sets, SCS, and CP

[0059] 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 slots / subframe. The subcarrier spacing can be equal to 2 μ *15 kHz, where μ is parameter set 0 to 4. Thus, the subcarrier spacing for parameter set μ = 0 is 15 kHz, and the subcarrier spacing for parameter set μ = 4 is 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A to 2D An example of normal CP with 14 symbols per slot and parameter set μ = 2 with 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) with frequency division multiplexing (see Figure 2B ). Each BWP can have a specific parameter set and CP (normal or extended).

[0060] A resource grid can be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0061] As Figure 2A illustrated, some of the REs in the RE carry reference (pilot) signals (RSs) for the UE. The RS can include a demodulation RS (DM-RS) (designated as R for a specific 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 can also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0062] Figure 2BExamples of various DL channels within a subframe of a frame are illustrated. The Physical Downlink Control Channel (PDCCH) carries DCI within one or more Control Channel Elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six Resource Element Groups (REGs), and each REG including 12 consecutive Resource Elements (REs) in an OFDM symbol of a Resource Block (RB). The PDCCH within a Bandwidth Part (BWP) can be referred to as a Control Resource Set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring occasion on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs can be located at higher and / or lower frequencies on the channel bandwidth. The Primary Synchronization Signal (PSS) can be in symbol 2 of a specific subframe of a frame. The PSS is used by the UE 104 to determine subframe / symbol timing and the physical layer identity. The Secondary Synchronization Signal (SSS) can be in symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the Demodulation Reference Signals (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 System Frame Number (SFN) and the number of RBs in the system bandwidth. The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not sent via the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0063] As Figure 2C illustrated, some of the REs carry DM-RS (denoted as R for a specific configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the previous one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is transmitted and depending on the specific PUCCH format used, the PUCCH DM-RS can be transmitted in different configurations. The UE can transmit a Sounding Reference Signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the teeth of the comb. The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling of the UL.

[0064] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH can be located at the position indicated in one configuration. The PUCCH carries uplink control information (UCI), such as a scheduling request, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and a 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 can additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0065] Figure 3 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 can 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 media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with the broadcast 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), radio access technology (RAT) - to - 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 the transfer of upper - layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re - segmentation of RLC data PDUs, and re - ordering of RLC data PDUs; and MAC layer functionality associated with the 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 via HARQ, priority handling, and logical channel prioritization.

[0066] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / 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 signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The encoded and modulated symbols are then split into parallel streams. Subsequently, each stream may be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a stream of time-domain OFDM symbols. The OFDM stream is space precoded to generate multiple spatial streams. Channel estimates from the channel estimator 374 may be used to determine the encoding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from reference signals transmitted by the UE 350 and / or channel state feedback. Each spatial stream is then provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with the corresponding spatial stream for transmission.

[0067] At the UE 350, each receiver 354Rx receives signals via its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then uses a fast Fourier transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency-domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signals, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on the channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0068] The controller / processor 359 may be associated with a memory 360 that stores program code and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between the transport channel and the logical channel, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0069] Similar to the functionality described in connection with DL transmission 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 the transfer of upper layer PDUs, error correction via ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and re-ordering of RLC data PDUs; and MAC layer functionality associated with the mapping between the logical channel and the transport channel, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0070] Channel estimates derived by the channel estimator 358 based on reference signals or feedback sent by the base station 310 may be used by the TX processor 368 to select an appropriate decoding and modulation scheme and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via a separate transmitter 354Tx. Each transmitter 354Tx may modulate an RF carrier with the corresponding spatial stream for transmission.

[0071] UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver functionality at the UE 350. Each receiver 318Rx receives signals via its corresponding antenna 320. Each receiver 318Rx recovers the information modulated onto the RF carrier and provides the information to the RX processor 370.

[0072] The controller / processor 375 may be associated with a memory 376 that stores program code and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between the transport channel and the logical channel, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0073] At least one of TX processor 368, RX processor 356, and controller / processor 359 may be configured to perform aspects of SBFD format update component 198 associated with Figure 1 ..

[0074] At least one of TX processor 316, RX processor 370, and controller / processor 375 may be configured to perform aspects of SBFD format update component 199 associated with Figure 1 ..

[0075] A wireless communication system may be configured to share available system resources and provide various telecommunication services (e.g., telephony, video, data, messaging, broadcasting, etc.) based on a multiple access technology that supports communication with multiple users. Full-duplex operation, in which a wireless device exchanges uplink and downlink communications that overlap in time, may enable more efficient use of the wireless spectrum. Full-duplex operation may include simultaneous transmission and reception within the same frequency range. In some examples, the frequency range may be a mmW frequency range, e.g., frequency range 2 (FR2). In other examples, the frequency range may be a sub-6 GHz frequency range, e.g., frequency range 1 (FR1). Full-duplex communication may reduce latency. For example, full-duplex operation of a network node may enable a UE to transmit an uplink signal in a traditional downlink-only time slot, which may reduce the latency of uplink communication and enhance uplink coverage (e.g., via uplink retransmission). In another example, full-duplex operation may enable a UE to receive a downlink signal in an uplink-only time slot, which may reduce the latency of downlink communication. Full-duplex communication may also improve system capacity and spectral efficiency, e.g., spectral efficiency per cell or per UE. Full-duplex communication may also enable more efficient use of wireless resources.

[0076] Figures 4A to 4C Various modes of full-duplex communication are illustrated. Full-duplex communication supports sending and receiving information on the same frequency band in an overlapping-in-time manner. In this way, the spectral efficiency may be increased relative to that of half-duplex communication, which supports sending or receiving information in one direction at a time without overlapping uplink and downlink communications. Due to the simultaneous transmit / receive nature of full-duplex communication, a UE or a base station may experience self-interference caused by signal leakage from its local transmitter to its local receiver. In addition, a UE or a base station may also experience interference from other devices, such as transmissions from a second UE or a second base station. Such interference (e.g., self-interference or interference caused by other devices) may affect the communication quality or even result in information loss.

[0077] Figure 4AShows a first example 400 of full - duplex communication, where a first base station 402a is in full - duplex communication with a first UE 404a and a second UE 406a. The first UE 404a and the second UE 406a can be configured for half - duplex communication or full - duplex communication. Figure 4A Illustrates a first UE 404a performing downlink reception and a second UE 406a performing uplink transmission. The second UE 406a can send a first uplink signal to the first base station 402a and other base stations (such as a second base station 408a adjacent to the second UE 406a). The first base station 402a concurrently (e.g., at least partially overlapping in time) sends a downlink signal to the first UE 404a while receiving the uplink signal from the second UE 406a. The base station 402a may experience self - interference at the receiving antenna where it is receiving the uplink signal from the UE 406a, which is caused by at least part of the downlink signal sent to the UE 404a. The base station 402a may experience additional interference, which is caused by the signal from the second base station 408a. Interference may also occur at the first UE 404a based on the signal from the second base station 408a and the uplink signal from the second UE 406a.

[0078] Figure 4B Shows a second example 410 of full - duplex communication, where a first base station 402b is in full - duplex communication with a first UE 404b. In this example, the UE 404b also operates in the full - duplex mode. The first base station 402b and the UE 404b receive and send communications that overlap in time and are in the same frequency band. The base station and the UE may each experience self - interference because the signal sent from the device leaks to the receiver at the same device (e.g., is received by the receiver). The first UE 404b may experience additional interference based on one or more signals transmitted from a second UE 406b and / or a second base station 408b adjacent to the first UE 404b.

[0079] Figure 4C Shows a third example 420 of full - duplex communication, where a first UE 404c sends and receives full - duplex communication with a first base station 402c and a second base station 408c. The first base station 402c and the second base station 408c can be used as multi - transmit - receive points (multi - TRPs) for UL and DL communication with the UE 404c. The second base station 408c can also exchange communications with a second UE 406c. In Figure 4CIn this case, the first UE 404c may send an uplink signal to the first base station 402c, which overlaps in time with receiving a downlink signal from the second base station 408c. As a result of receiving the first signal at least in part while receiving the second signal, the first UE 404c may experience self-interference. For example, when the UE is attempting to receive a signal from another base station 408c, the uplink signal of the UE going to the base station 402c may leak into the UE's receiver (e.g., be received by the receiver). The first UE 404c may experience additional interference from the second UE 406c.

[0080] Figure 4D Example 430 illustrates self-interference received in the direction of the transmitting antenna and self-interference caused by clutter or reflection of the signal from the transmitter at the device receiving the interference and the receiver of the same device. The distance (d) between the transmitter and the receiver may affect the amount of self-interference or clutter experienced during reception at the device. For example, the device may be a base station or a UE as shown in Figures 4A to 4C the figure.

[0081] Full-duplex communication may be in the same frequency band. Uplink and downlink communications may be in different frequency subbands. Figure 5A Examples 500, 510, 520, and 530 illustrate the first example, the second example, the third example, and the fourth example of subband full-duplex (SBFD) resources. In SBFD, the transmit and receive resources may overlap in time using different frequencies, as shown in the first example 500, the second example 510, the third example 520, and the fourth example 530.

[0082] In the first example 500, the receive resource 502 occupies the first subband in the frequency band, and the transmit resource 504 occupies a second subband different from the first subband. In the first example 500, the transmit resource 504 is in a higher frequency subband relative to the receive resource 502. However, it should be noted that the transmit resource 504 may be in a lower frequency subband relative to the receive resource 502. For example, in the second example 510, the receive resource 514 occupies the first subband in the frequency band, and the transmit resource 512 occupies a second subband different from the first subband. In the second example 510, the transmit resource 512 is in a lower frequency subband relative to the receive resource 514.

[0083] According to one aspect of the present disclosure, a receiving resource or a transmitting resource may occupy more than one sub-band. For example, in the third example 520, the transmitting resource 524 occupies the first sub-band in the frequency band, and the receiving resource 522 occupies the second and third sub-bands in the frequency band, where the first sub-band is between the second and third sub-bands. In the fourth example 530, the receiving resource 534 occupies the first sub-band in the frequency band, and the transmitting resource 532 occupies the second and third sub-bands in the frequency band, where the first sub-band is between the second and third sub-bands.

[0084] According to one aspect of the present disclosure, a transmitting resource (e.g., transmitting resources 504, 512, 524, and / or 532) may be separated from a receiving resource (e.g., receiving resources 502, 514, 522, and / or 534) by a guard band. The guard band may be a frequency resource or a gap in the frequency resource provided between the transmitting resource and the receiving resource. Separating the transmitting frequency resource from the receiving frequency resource using a guard band may help reduce self-interference. A transmitting resource and a receiving resource that are adjacent to each other may be considered to have a guard bandwidth of 0. Since the output signal from a wireless device may extend beyond the transmitting resource, the guard band may reduce the interference experienced by the wireless device. Sub-band FDD may also be referred to as "flexible duplex".

[0085] If full-duplex operation is used for a UE or a device implementing UE functionality, the transmitting resources 504, 512, 524, and / or 532 may correspond to uplink resources, and the receiving resources 502, 514, 522, and / or 534 may correspond to downlink resources. Alternatively, if full-duplex operation is used for a base station or a device implementing base station functionality, the transmitting resources 504, 512, 524, and / or 532 may correspond to downlink resources, and the receiving resources 502, 514, 522, and / or 534 may correspond to uplink resources.

[0086] Figure 5B An example base station is illustrated in which a portion of the antenna panel 575 may be used to transmit communication to UE 1 and a portion of the antenna panel 585 may be used to receive communication from UE 2 in a full-duplex mode.

[0087] SBFD allows for simultaneous transmission / reception of downlink (DL) / uplink (UL) based on sub-bands. A full-duplex base station may perform simultaneous transmission and reception on the same time slot. SBFD may increase the UL duty cycle, thereby reducing latency (e.g., it may be possible to transmit UL signals only in DL time slots, which may achieve latency savings) and improving UL coverage. It may also be possible to receive DL signals only in UL time slots. Additionally, SBFD may enhance system capacity, resource utilization, and / or spectral efficiency. SBFD also enables flexible and dynamic UL / DL resource adaptation in a robust manner according to UL / DL traffic.

[0088] The present disclosure provides methods and apparatus for flexible subbands (e.g., dynamic or semi-static signaling), where the flexible subbands update the SBFD format for time slots or symbols of SBFD-aware UEs. An SBFD-aware UE may refer to a UE that supports receiving information about the SBFD mode of a device (e.g., such as a network node) with which it is communicating. By supporting such information, the UE can be aware, for example, of signaling that can receive indications of when the base station will operate in the SBFD mode, when to schedule UL transmissions outside the UL subband, or when to schedule DL receptions within the UL subband. In some aspects, an SBFD-aware UE configured with a UL subband in an SBFD time slot or symbol does not expect to be scheduled for UL transmissions outside the UL subband and does not expect to be scheduled for DL receptions within the UL subband in the SBFD time slot or symbol. In some aspects, the methods and apparatus may be related to scenarios where an SBFD-aware UE configured with a UL subband in an SBFD time slot or symbol does not expect to be scheduled for UL transmissions outside the UL subband and may be scheduled for DL receptions within the UL subband in the SBFD time slot or symbol. In other aspects, the methods and apparatus may be related to scenarios where an SBFD-aware UE configured with a UL subband in an SBFD time slot or symbol does not expect to be scheduled for DL receptions within the UL subband and may be scheduled for UL transmissions outside the UL subband in the SBFD time slot or symbol. In some aspects, the base station may, for example, indicate to the UE via scheduling DCI that the UE is scheduled for DL reception in the UL subband or for UL transmission outside the UL subband (e.g., in the DL subband). Dynamic scheduling may allow for more flexibility and resource utilization. Aspects presented herein may enable the UE and / or network node to change filters to provide scheduled transmissions or receptions. Aspects presented herein may achieve increased cell coordination to avoid CLI.

[0089] In one configuration, a network node may use RRC signaling or group common DCI signaling (e.g., the slot format indicator (SFI) in DCI format 2_0) to indicate to a UE to receive DL reception (e.g., receive a DL signal) in the UL subband within an SBFD slot or symbol (instead of dynamically indicating to the UE via scheduling DCI that it is scheduled for DL reception in the UL subband within an SBFD slot or symbol). For example, the RRC signaling or SFI may indicate to the UE to discard UL transmission but receive dynamic or periodic DL signals in the UL subband. The SFI may be included in group common DCI (e.g., DCI format 2_0), and this group common DCI indicates that the SBFD format is to be converted to a DL resource set at each symbol level or each slot level (e.g., for each SBFD slot or symbol, the SFI may indicate that it is to be converted to a DL slot or symbol). According to this configuration, the network node and / or the UE may have more time to retune their respective RF filters (if needed), and the network node may have more time to coordinate with adjacent network nodes to reduce CLI.

[0090] In another configuration, a network node may dynamically indicate to a UE, via scheduling DCI (e.g., UE-specific DCI) or DCI that does not schedule any data transmission, that it is scheduled for DL reception in the UL subband within an SBFD slot or symbol. According to this configuration, the scheduling DCI may include one or more bits (e.g., one bit, two bits, etc.), and these one or more bits indicate the conversion of at least one subband of the SBFD format for the symbol or slot indicated for SBFD operation. For example, a bit value of "1" may indicate that the SBFD is to be converted to DL (e.g., the UL subband is to be converted to a DL subband, and thus the SBFD symbol is to be converted to a conventional DL symbol), and a bit value of "0" may indicate no conversion. In some aspects, the indication may include a single bit carried in the DCI. Note that the above values are merely examples, and other values may be utilized.

[0091] The functionality to receive a DL signal within the UL subband according to the above configuration may be a UE capability, where an SBFD-aware UE can be scheduled (or indicated) for DL reception in the UL subband within an SBFD slot or symbol. In some aspects, the UE may indicate support for this capability to the network, e.g., in RRC signaling to the network. Based on the UE's support for this capability, the network may provide this indication, e.g., in RRC signaling, SFI, scheduling DCI, or DCI that does not schedule any data transmission.

[0092] For periodic DL signaling (e.g., downlink communication based on semi-persistent scheduling (SPS)), the network node may indicate to the UE, at certain SPS occasions (e.g., via a bitmap), or in SBFD time slots or symbols, or at all SPS occasions, to discard UL transmissions in the UL subband but receive DL signals in the UL subband. For example, the bitmap may include a plurality of bits, each bit corresponding to a specific SPS occasion, SBFD time slot, and / or SBFD symbol. Each bit may be set to one of a plurality of different values, each value indicating whether the UE is to discard UL transmissions in the UL subband and instead receive DL signals in the UL subband. For example, a value of "1" for a particular bit may indicate that the UE is to discard UL transmissions in the corresponding SPS occasion, SBFD time slot, and / or SBFD symbol in the UL subband and instead receive DL signals in the corresponding SPS occasion, SBFD time slot, and / or SBFD symbol in the UL subband. A value of "0" for a particular bit may indicate that the UE does not discard UL transmissions in the corresponding SPS occasion, SBFD time slot, and / or SBFD symbol in the UL subband. Note that the above values are merely examples, and other values may be utilized.

[0093] Figure 6A An example of the SBFD format of the UL subband updated for DL reception is shown. Specifically, Figure 6A A first example 600 depicting a time slot before the SBFD format is updated and a second example 610 depicting a time slot after the SBFD format is updated are illustrated. In the first example 600, the transmission resource 602 occupies the first subband (e.g., UL subband) in the frequency band allocated for the time slot, and the reception resource 604 occupies a second subband (e.g., DL subband) different from the first subband allocated for the time slot. The terms "first" and "second" are only used to distinguish different subbands and do not imply a particular order of the subbands. In the first example 600, the reception resource 604 is in a higher frequency subband relative to the transmission resource 602. As shown in the second example 610, after the SBFD format of the UL subband is updated for DL reception (e.g., as described above, in response to receiving signaling to update the SBFD format from the network node), the reception resource (shown as reception resource 612) occupies the portion of the time slot that previously occupied the transmission resource 602.

[0094] Figure 6B Another example of the SBFD format of the UL subband updated for DL reception is shown. Specifically, Figure 6BIllustrates a first example 620 depicting a time slot before the SBFD format is updated and a second example 630 depicting a time slot after the SBFD format is updated. In the first example 620, the transmit resource 624 occupies the first sub-band in the frequency band, and the receive resource 622 occupies the second and third sub-bands in the frequency band, where the first sub-band is between the second and third sub-bands. As shown in the second example 630, after updating the SBFD format of the UL sub-band for DL reception (e.g., as described above, in response to receiving signaling to update the SBFD format from a network node), the receive resource (shown as receive resource 632) occupies the portion of the time slot that previously occupied the transmit resource 624.

[0095] In another configuration, the network node can use RRC signaling or SFI to indicate to the UE to transmit a UL signal outside the UL sub-band in an SBFD time slot or symbol (instead of dynamically indicating to the UE via scheduling DCI a UL transmission outside the UL sub-band in an SBFD time slot or symbol). For example, the RRC signaling or SFI can indicate to the UE to discard DL reception in the DL sub-band, but transmit a dynamic or periodic UL signal in the DL sub-band in an SBFD time slot or symbol. The SFI can be included in group common DCI (e.g., DCI format 2_0), which indicates that the SBFD is to be converted to UL at the per-symbol level or per-time-slot level (e.g., for each SBFD time slot or symbol, the SFI can indicate that it will be converted to a UL time slot or symbol). According to this configuration, the network node and / or the UE can have more time to retune their respective RF filters (if needed), and the network node can have more time to coordinate with neighboring network nodes to reduce CLI.

[0096] In yet another configuration, the network node can dynamically indicate to the UE a UL transmission outside the UL sub-band in an SBFD time slot or symbol via scheduling DCI (e.g., UE-specific DCI) or DCI that does not schedule any data transmission. According to this configuration, the scheduling DCI can include one or more bits (e.g., one bit, two bits, etc.), which indicate the conversion of at least one sub-band of the SBFD format for the symbol or time slot indicated for SBFD operation. For example, a bit value of "1" can indicate that the SBFD is to be converted to UL (e.g., the DL sub-band is to be converted to a UL sub-band, and thus the SBFD symbol is to be converted to a traditional UL symbol), and a bit value of "0" can indicate no conversion. Note that the above values are merely examples, and other values can be used.

[0097] The functionality to schedule UL transmissions outside the UL sub-band according to the above configuration can be a UE capability, where the SBFD-aware UE can be scheduled (or indicated) to have UL transmissions outside the UL sub-band in SBFD time slots or symbols. In some aspects, the UE can indicate support for this capability to the network, e.g., in RRC signaling to the network. Based on the UE's support for this capability, the network can provide this indication, e.g., in RRC signaling, SFI, scheduling DCI, or DCI that does not schedule any data transmission.

[0098] For periodic UL signaling (e.g., configured grant (CG)), the network node can indicate to the UE in certain CG opportunities (e.g., via a bitmap), or in SBFD time slots or symbols, or in all CG opportunities, to discard DL reception in the DL sub-band but transmit dynamic or periodic UL signals in the DL sub-band. For example, the bitmap can include multiple bits, each bit corresponding to a specific CG opportunity, SBFD time slot, and / or SBFD symbol. Each bit can be set to one of a plurality of different values, each value indicating whether the UE is to discard DL reception in the DL sub-band and, instead, transmit a UL signal in the DL sub-band. For example, a value of "1" for a particular bit can indicate that the UE is to discard DL reception in the corresponding CG opportunity, SBFD time slot, and / or SBFD symbol in the DL sub-band and, instead, transmit a UL signal in the corresponding CG opportunity, SBFD time slot, and / or SBFD symbol in the DL sub-band. A value of "0" for a particular bit can indicate that the UE does not discard DL reception in the corresponding CG opportunity, SBFD time slot, and / or SBFD symbol in the DL sub-band. Note that the above values are merely examples, and other values can be utilized.

[0099] Figure 7A An example of the SBFD format of the DL sub-band updated for the time slot allocation for UL transmission is shown. Specifically, Figure 7A A first example 700 depicting a time slot before the SBFD format is updated and a second example 710 depicting a time slot after the SBFD format is updated are illustrated. In the first example 700, the transmission resource 702 occupies a first sub-band (e.g., UL sub-band) in the frequency band allocated for the time slot, and the reception resource 704 occupies a second sub-band (e.g., DL sub-band) different from the first sub-band allocated for the time slot. In the first example 700, the reception resource 704 is in a higher frequency sub-band relative to the transmission resource 702. As shown in the second example 710, after updating the SBFD format of the DL sub-band for UL transmission (e.g., as described above, in response to receiving signaling to update the SBFD format from a network node), the transmission resource (shown as transmission resource 712) occupies the portion of the time slot that previously occupied the reception resource 704.

[0100] Figure 7BAnother example of the SBFD format of a DL subband updated for UL transmission is shown. Specifically, Figure 7B A first example 720 depicting a time slot before the SBFD format is updated and a second example 730 depicting a time slot after the SBFD format is updated are illustrated. In the first example 720, a receive resource 724 occupies a first subband in a frequency band, and a transmit resource 722 occupies a second subband and a third subband in the frequency band, where the first subband is between the second subband and the third subband. As shown in the second example 730, after updating the SBFD format of the DL subband for UL transmission (e.g., as described above, in response to receiving signaling to update the SBFD format from a network node), the transmit resource (shown as transmit resource 732) occupies a portion of the time slot that previously occupied the receive resource 724.

[0101] Figure 8 FIG. 800 is a call flow diagram illustrating a method of wireless communication according to various aspects of the present disclosure. Although aspects are described with respect to a network node 804, these aspects may be performed by network nodes in an aggregation and / or by one or more components of network node 804 (e.g., such as CU 110, DU 130, and / or RU 140). Network entity 804 may be configured to operate in SBFD mode, and the UE may be configured to operate in a half-duplex mode. Alternatively, both network node 804 and the UE may be configured to operate in SBFD mode. As Figure 8 shown, at 806, UE 802 may receive an indication of support for the ability to receive DL within the UL subband of the SBFD format, or transmit UL outside the UL subband of the SBFD format, or one or more of them.

[0102] At 808, UE 802 may receive information indicating a set of time slots or a set of symbols for SBFD operation.

[0103] At 810, UE 802 may receive an SBFD format configuration including at least a first subband (e.g., UL subband) for UL communication and a second subband (e.g., DL subband) for DL communication. The information received at step 808 and the SBFD format configuration received at step 810 may be included in the same signal. Alternatively, the information received at step 808 is included in a first signal, and the configuration received at step 810 is included in a second signal different from the first signal.

[0104] At 812, UE 802 may receive an indication to update the SBFD format for at least a subset of the set of time slots or the set of symbols. The indication may adjust the SBFD format for the indicated symbols or time slots for SBFD operation to change to DL reception in the first subband or UL transmission in the second subband.

[0105] In one configuration, the indication is included in the SFI. For each SBFD time slot or symbol, the SFI may indicate whether it is to be converted to a DL time slot or symbol or a UL time slot or symbol. In another configuration, the indication is included in the RRC signaling. In a further configuration, the indication is included in the scheduling DCI. For example, the scheduling DCI may include one or more bits (e.g., one bit, two bits, etc.), and the one or more bits indicate the conversion of at least one subband of the SBFD format for the symbol or time slot indicated for SBFD operation. In yet another configuration, the indication is included in the DCI that does not schedule data transmission for the UE 802.

[0106] In one configuration, when updating the SBFD format for DL reception, the indication may update the SBFD format of a subset of the set of time slots or symbols corresponding to the periodic signal occasion or SPS occasion in which DL communication in the first subband is to be received. When updating the SBFD format for UL transmission, the indication may update the SBFD format of a subset of the set of time slots or symbols corresponding to the periodic signal occasion or CG occasion in which UL communication in the second subband is to be transmitted.

[0107] At step 814, based on the indication, the UE 802 may discard UL transmission in the first subband during at least a subset of the set of time slots or symbols, or discard DL reception in the second subband during at least a subset of the set of time slots or symbols. For example, if the indication indicates that the SBFD format during a particular time slot or symbol is to be updated for DL reception, the UE 802 may discard UL transmission in the first subband during that particular time slot or symbol. In another example, if the indication indicates that the SBFD format during a particular time slot or symbol is to be updated for UL transmission, the UE 802 may discard DL reception in the second subband during that particular time slot or symbol.

[0108] At 816, the UE 802 and the network node 804 may communicate using the adjusted SBFD format. For example, if the SBFD format for the first subband during a particular time slot or symbol has been updated for DL reception, the UE may receive DL transmissions in the first subband and / or the second subband. In another example, if the SBFD format for the second subband during a particular time slot or symbol has been updated for UL transmission, the UE may transmit UL signals in the first subband and / or the second subband.

[0109] Figure 9 is a flowchart 900 illustrating a method of wireless communication at a UE according to various aspects of the present disclosure. The method may be performed by the UE. The UE may be Figure 11UE 104, 350, 802, or apparatus 1104 in the hardware specific implementation. This method enables flexible utilization of transmission and reception resources in wireless communication. In addition, this method gives the UE more time to retune (or change) the RF filter and gives the network node time to coordinate with adjacent network nodes to reduce CLI. Therefore, this method improves the efficiency of wireless communication and minimizes the CLI with adjacent network nodes.

[0110] As Figure 9 shown, at 902, the UE may receive an indication indicating a set of time slots or a set of symbols for SBFD operation. For example, referring to Figure 8 , at 808, UE 802 may receive an indication indicating a set of time slots or a set of symbols for SBFD operation from network node 804. In some aspects, 902 may be performed by component 198.

[0111] At 904, the UE may receive a configuration of the SBFD format including at least a first subband for UL communication and a second subband for DL communication. For example, referring to Figure 8 , at 810, UE 802 may receive a configuration of the SBFD format including at least a first subband for UL communication and a second subband for DL communication from a network node (e.g., network node 804). In some aspects, 904 may be performed by component 198.

[0112] At 906, the UE may receive an indication indicating that the UE updates the SBFD format for at least a subset of the set of time slots or the set of symbols. For example, referring to Figure 8 , at 812, UE 802 may receive an indication from network node 804 indicating that UE 802 updates the SBFD format for at least a subset of the set of time slots or the set of symbols. In some aspects, 906 may be performed by component 198.

[0113] In some aspects, the UE may communicate with the network node using the adjusted SBFD format based on the indication. For example, referring to Figure 8 , at 816, UE 802 may communicate with network node 804 using the adjusted SBFD format.

[0114] In some aspects, the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for SBFD operation to change to at least one of DL reception in the first subband or UL transmission in the second subband. For example, referring to Figure 8When the UE 802 receives the indication at 812, the indication may adjust the SBFD format for one or more symbols or one or more time slots indicated for SBFD operation to change to at least one of DL reception in the first subband or UL transmission in the second subband.

[0115] In some aspects, the indication is included in the SFI. For example, refer to Figure 8 When the UE 802 receives the indication at 812, the indication may be included in the SFI. In some aspects, the SFI is included in the group common DCI. For example, refer to Figure 8 When the UE 802 receives the indication at 812, the SFI including the indication may be included in the group common DCI.

[0116] In some aspects, the indication is included in the RRC signaling. For example, refer to Figure 8 When the UE 802 receives the indication at 812, the indication may be included in the RRC signaling.

[0117] In some aspects, the indication includes one or more bits of the scheduling DCI, and the one or more bits indicate the conversion of at least one subband of the SBFD format for one or more symbols or one or more time slots indicated for SBFD operation. For example, refer to Figure 8 When the UE 802 receives the indication at 812, the indication may include one or more bits of the scheduling DCI, and the one or more bits indicate the conversion of at least one subband of the SBFD format for one or more symbols or one or more time slots indicated for SBFD operation.

[0118] In some aspects, the indication is included in the DCI that does not schedule data transmission for the UE. For example, refer to Figure 8 When the UE 802 receives the indication at 812, the indication may be included in the DCI that does not schedule data transmission for the UE 802.

[0119] In some aspects, the indication updates the SBFD format for a subset of the time slot set or symbol set corresponding to one or more of the following: the SPS occasion for DL communication in the first subband, the CG occasion for UL communication in the second subband, or the periodic signaling occasion for DL communication in the first subband or UL communication in the second subband. For example, refer to Figure 8When the UE 802 receives the indication at 812, the indication updates the SBFD format for a subset of a set of time slots or a set of symbols corresponding to one or more of the following: SPS timing for DL communication in a first subband, CG timing for UL communication in a second subband, or periodic signaling timing for DL communication in the first subband or UL communication in the second subband.

[0120] In some aspects, the indication updates the SBFD format for DL reception in a first subband. In response to receiving such an indication, the UE discards UL transmissions in the first subband during at least a subset of the set of time slots or the set of symbols, and receives DL transmissions in the first subband and the second subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols. For example, referring to Figure 8 When the UE receives the indication at 812, the indication updates the SBFD format for DL reception in the first subband, and the UE 802 discards UL transmissions in the first subband during at least a subset of the set of time slots or the set of symbols, and receives DL transmissions in the first subband and the second subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0121] In some aspects, the indication updates the SBFD format for UL transmission in a second subband. In response to receiving such an indication, the UE discards DL reception in the second subband during at least a subset of the set of time slots or the set of symbols, and transmits UL signals in the second subband and the first subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols. For example, referring to Figure 8 When the UE receives the indication at 812, the indication updates the SBFD format for UL transmission in the second subband, and the UE 802 discards DL reception in the second subband during at least a subset of the set of time slots or the set of symbols, and transmits UL signals in the second subband and the first subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0122] In some aspects, prior to receiving the indication, the UE may indicate support for the ability to receive DL within a UL subband of the SBFD format, or transmit UL outside the UL subband of the SBFD format, or both. For example, referring to Figure 8 Prior to receiving the indication at 812, at 806, the UE 802 may output an indication to the network node 804 indicating support for the ability to receive DL within a UL subband of the SBFD format, or transmit UL outside the UL subband of the SBFD format, or both.

[0123] In some aspects, the indication is received via at least one transceiver. For example, referring to Figure 8, this indication is received via at least one transceiver of the UE 802 (e.g., transceiver 1122).

[0124] In some aspects, the UE operates in a half-duplex mode and the network node operates in the SBFD mode. For example, referring to Figure 8 , the UE 802 operates in a half-duplex mode and the network node 804 operates in the SBFD mode.

[0125] Figure 10 FIG. 1000 is a flowchart illustrating a method for wireless communication at a network node according to various aspects of the present disclosure. The method can be executed by a network node. The network node can be Figure 1 a base station or a component of a base station in an access network, or a core network component (e.g., base stations 102, 310; network node 804; or Figure 12 the network entity 1202 in a hardware implementation of ). This method enables flexible utilization of transmission and reception resources in wireless communication. In addition, this method gives the UE more time to retune (or change) the RF filter and gives the network node time to coordinate with adjacent network nodes to reduce CLI. Therefore, this method improves the efficiency of wireless communication and minimizes the CLI with adjacent network nodes.

[0126] As Figure 10 shown, at 1002, the network node can output information indicating a set of time slots or a set of symbols for SBFD operation. For example, referring to Figure 8 , at 808, the network node 804 can output an indication indicating a set of time slots or a set of symbols for SBFD operation to the UE 802. In some aspects, 1002 can be executed by component 199.

[0127] At 1004, the network node can output a configuration of the SBFD format including at least a first sub-band for UL communication and a second sub-band for DL communication. For example, referring to Figure 8 , at 810, the network node 804 can output a configuration of the SBFD format including at least a first sub-band for UL communication and a second sub-band for DL communication. In some aspects, 1004 can be executed by component 199.

[0128] At 1006, the network node can output an indication to update the SBFD format for at least a subset of the set of time slots or the set of symbols. For example, referring to Figure 8 , at 812, the network node 804 can output an indication to the UE 802 to update the SBFD format for at least a subset of the set of time slots or the set of symbols from the network node 804. In some aspects, 906 can be executed by component 199.

[0129] In some aspects, the network node may communicate with at least one UE using an adjusted SBFD format based on the indication. For example, referring to Figure 8 , at 816, the network node 804 may communicate with the UE 802 using an adjusted SBFD format.

[0130] In some aspects, the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for SBFD operations to change to at least one of DL reception in a first subband or UL transmission in a second subband. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication may adjust the SBFD format for one or more symbols or one or more time slots indicated for SBFD operations to change to at least one of DL reception in a first subband or UL transmission in a second subband.

[0131] In some aspects, the indication is included in the SFI. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication may be included in the SFI. In some aspects, the SFI is included in the group common DCI. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the SFI including the indication may be included in the group common DCI.

[0132] In some aspects, the indication is included in the RRC signaling or scheduling DCI for the UE. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication may be included in the RRC signaling or scheduling DCI for the UE 802.

[0133] In some aspects, the indication includes one or more bits of the scheduling DCI, and the one or more bits indicate the conversion of at least one subband of the SBFD format for one or more symbols or one or more time slots indicated for SBFD operations. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication may include one or more bits of the scheduling DCI, and the one or more bits indicate the conversion of at least one subband of the SBFD format for one or more symbols or one or more time slots indicated for SBFD operations.

[0134] In some aspects, the indication is included in the DCI that does not schedule data transmission for the UE. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication may be included in the DCI that does not schedule data transmission for the UE 802.

[0135] In some aspects, the indication updates the SBFD format for a subset of a set of time slots or a set of symbols corresponding to one or more of the following: SPS timing for DL communication in a first sub - band, CG timing for UL communication in a second sub - band, or periodic signaling timing for DL communication in a first sub - band or UL communication in a second sub - band. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication updates the SBFD format for a subset of a set of time slots or a set of symbols corresponding to one or more of the following: SPS timing for DL communication in a first sub - band, CG timing for UL communication in a second sub - band, or periodic signaling timing for DL communication in a first sub - band or UL communication in a second sub - band.

[0136] In some aspects, the indication updates the SBFD format for the UE to include DL transmission in a first sub - band. In response to receiving such an indication, the network node discards UL reception in the first sub - band during at least a subset of the set of time slots or the set of symbols, and outputs DL transmissions in the first and second sub - bands in one or more time slots or symbols in the subset of the set of time slots or the set of symbols. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication updates the SBFD format for the UE 802 to include DL transmission in a first sub - band, and the network node 804 discards UL reception in the first sub - band during at least a subset of the set of time slots or the set of symbols, and outputs DL transmissions in the first and second sub - bands in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0137] In some aspects, the indication updates the SBFD format for UL transmission in a second sub - band. In response to receiving such an indication, the network node discards DL transmission in the second sub - band during at least a subset of the set of time slots or the set of symbols, and receives UL signals in the second and first sub - bands in one or more time slots or symbols in the subset of the set of time slots or the set of symbols. For example, referring to Figure 8 , when the network node 804 outputs the indication at 812, the indication updates the SBFD format for UL transmission in a second sub - band, and the network node discards DL transmission in the second sub - band during at least a subset of the set of time slots or the set of symbols, and receives UL signals in the second and first sub - bands in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0138] In some aspects, before outputting the indication, the network node may receive a UE indication of support for one or more of DL reception within the UL sub - band of the SBFD format, or UL transmission outside the UL sub - band of the SBFD format. For example, referring toFigure 8 Before outputting the indication at 812, at 806, network node 804 may receive from UE 802 a UE indication supporting the ability to indicate reception of DL within a UL sub-band in SBFD format, or transmission of UL outside a UL sub-band in SBFD format, or one or more of them.

[0139] In some aspects, the indication is sent via at least one transceiver. For example, referring to Figure 8 the indication is sent via at least one transceiver (e.g., transceiver 1246) of network node 804.

[0140] In some aspects, SBFD operations are performed to communicate with one or more UEs in a half-duplex mode. For example, referring to Figure 8 network node 804 performs SBFD operations to communicate with UE 802 in a half-duplex mode. Network node 804 may operate in SBFD mode.

[0141] Figure 11FIG. 1100 is a diagram illustrating an example of a hardware implementation for apparatus 1104. Apparatus 1104 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, apparatus 1104 may include a cellular baseband processor 1124 (also referred to as a modem) coupled to one or more transceivers 1122 (e.g., cellular RF transceivers). The cellular baseband processor 1124 may include on-chip memory 1124'. In some aspects, apparatus 1104 may further include one or more subscriber identity module (SIM) cards 1120 and an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110. The application processor 1106 may include on-chip memory 1106'. In some aspects, apparatus 1104 may further include a Bluetooth module 1112, a WLAN module 1114, a satellite positioning system (SPS) module 1116 (e.g., GNSS module), one or more sensor modules 1118 (e.g., an atmospheric pressure sensor / altimeter; motion sensors such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio assisted detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), additional memory modules 1126, a power source 1130, and / or a camera 1132. The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include on-chip transceivers (TRX) (or in some cases, only receivers (RX)). The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include their own dedicated antennas and / or communicate using antenna 1180. The cellular baseband processor 1124 communicates with UE 104 and / or with an RU associated with network entity 1102 via transceiver 1122 through one or more antennas 1180. The cellular baseband processor 1124 and the application processor 1106 may each separately include computer-readable media / memory 1124', 1106'. The additional memory module 1126 may also be considered computer-readable media / memory. Each computer-readable media / memory 1124', 1106', 1126 may be non-transitory. The cellular baseband processor 1124 and the application processor 1106 are each responsible for general processing, including executing software stored on the computer-readable media / memory. The software, when executed by the cellular baseband processor 1124 / application processor 1106, causes the cellular baseband processor 1124 / application processor 1106 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by the cellular baseband processor 1124 / application processor 1106 when executing the software.The cellular baseband processor 1124 / application processor 1106 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 1104 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1124 and / or the application processor 1106, and in another configuration, the device 1104 may be the entire UE (e.g., see. Figure 3 of 350) and include additional modules of the device 1104.

[0142] As discussed above, the component 198 is configured to receive information indicating a set of time slots or a set of symbols for sub-band full duplex (SBFD) operation. The component 198 is further configured to receive an SBFD format configuration including at least a first sub-band for uplink communication and a second sub-band for downlink communication. The component 198 is further configured to receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols. The component 198 may also be configured to perform any aspect of the aspects described in conjunction with Figure 9 the flowchart in Figure 8 and / or any aspect of the aspects performed by the UE 802 in Figure 9 the flowchart in Figure 8Components of various aspects performed by UE 802 in []. The components may be components 198 of apparatus 1104 configured to perform the functions described by the components. As described above, apparatus 1104 may include TX processor 368, RX processor 356, and controller / processor 359. Thus, in one configuration, the components may be TX processor 368, RX processor 356, and / or controller / processor 359 configured to perform the functions described by the components.

[0143] Figure 12 FIG. 1200 is a diagram illustrating an example of a hardware implementation for network entity 1202. Network entity 1202 may be a BS, a component of a BS, or may implement BS functionality. Network entity 1202 may include at least one of CU 1210, DU 1230, or RU 1240. For example, depending on the layer functionality handled by component 199, network entity 1202 may include CU 1210; both CU 1210 and DU 1230; each of CU 1210, DU 1230, and RU 1240; DU 1230; both DU 1230 and RU 1240; or RU 1240. CU 1210 may include CU processor 1212. CU processor 1212 may include on-chip memory 1212'. In some aspects, CU 1210 may also include additional memory modules 1214 and communication interface 1218. CU 1210 communicates with DU 1230 via an intermediate link (such as the F1 interface). DU 1230 may include DU processor 1232. DU processor 1232 may include on-chip memory 1232'. In some aspects, DU 1230 may also include additional memory modules 1234 and communication interface 1238. DU 1230 communicates with RU 1240 via a fronthaul link. RU 1240 may include RU processor 1242. RU processor 1242 may include on-chip memory 1242'. In some aspects, RU 1240 may also include additional memory modules 1244, one or more transceivers 1246, antenna 1280, and communication interface 1248. RU 1240 communicates with UE 104. On-chip memories 1212', 1232', 1242' and additional memory modules 1214, 1234, 1244 may each be considered computer-readable media / memory. Each computer-readable media / memory may be non-transitory. Each of processors 1212, 1232, 1242 is responsible for general processing, including executing software stored on the computer-readable media / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by the processor when executing the software.

[0144] As discussed above, component 199 is configured to output information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation. Component 199 is also configured to output an SBFD format configuration including at least a first sub-band for uplink communication and a second sub-band for downlink communication. Component 199 is also configured to output an indication updating the SBFD format for at least a subset of the set of time slots or the set of symbols. Component 199 may also be configured to perform any aspect of the aspects described in conjunction with the flowchart in Figure 10 and / or any aspect of the aspects performed by the network node 804 in Figure 8 . Component 199 may be within one or more processors of one or more of CU 1210, DU 1230, and RU 1240. Component 199 may be one or more hardware components specifically configured to perform the stated processes / algorithms, implemented by one or more processors configured to perform the stated processes / algorithms, stored in a computer-readable medium for implementation by one or more processors, or some combination of the above. Network entity 1202 may include a variety of components configured for various functions. In one configuration, network entity 1202 includes means for outputting information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation. Network entity 1202 may also include means for outputting an SBFD format configuration including at least a first sub-band for uplink communication and a second sub-band for downlink communication. Network entity 1202 may also include means for outputting an indication updating the SBFD format for at least a subset of the set of time slots or the set of symbols. Network entity 1202 may also include means for performing any aspect of the aspects described in conjunction with the flowchart in Figure 10 and / or any aspect of the aspects performed by the network node 804 in Figure 8 . The means may be component 199 of network entity 1202 configured to perform the functions recited by the means. As described above, network entity 1202 may include TX processor 316, RX processor 370, and controller / processor 375. Thus, in one configuration, the means may be TX processor 316, RX processor 370, and / or controller / processor 375 configured to perform the functions recited by the means.

[0145] The present disclosure provides methods and apparatuses for flexible sub-band signaling (e.g., dynamic or semi-static signaling), which updates the SBFD format for time slots or symbols to improve the efficiency of wireless communication. In some aspects, a UE may receive information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation. The UE may also receive a configuration of an SBFD format that includes at least a first sub-band for uplink communication and a second sub-band for downlink communication. The UE may further receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols. The method enables flexible utilization of transmission and reception resources in wireless communication. In addition, the method gives the UE more time to retune (or change) the RF filter and gives the network node time to coordinate with adjacent network nodes to reduce CLI. Therefore, the method improves the efficiency of wireless communication and minimizes the CLI with adjacent network nodes.

[0146] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely illustrative of example methods. It should be understood that, based on design preferences, the specific order or hierarchy of the blocks in the process / flowchart may be rearranged. Further, some blocks may be combined or omitted. The appended method claims present the elements of the various blocks in a sample order, but are not limited to the specific order or hierarchy given.

[0147] 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 readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not limited to the aspects described herein, but are to be accorded the full scope consistent with the language of the claims, where a reference to an element in the singular is not intended to mean "one and only one" but rather "one or more" unless specifically stated otherwise. Terms such as "if," "when," and "while" do not denote a direct temporal relationship or reaction. That is, these phrases, such as "when...," do not mean an immediate action in response to or during the occurrence of an action, but simply imply that if the condition is met, then the action will occur, without requiring a specific or immediate time limit for the occurrence of the action. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or having an advantage over other aspects. Unless specifically stated otherwise, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "any combination of A, B, C, or any of them," including any combination of A, B, and / or C, may include multiple A's, multiple B's, or multiple C's. 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 "any combination of A, B, C, or any of them" can 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 construed as a collection 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 a first device receives data from or sends data to a second device, the data may be received / sent directly between the first and second devices, or indirectly between the first and second devices through a collection of devices. All structural and functional equivalents of the elements of the aspects described throughout this disclosure that are known or later will be known to those of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public, whether or not such disclosure is explicitly recited in the claims. The words "module," "mechanism," "element," "device," etc. shall not be used as a substitute for the word "component." Thus, no claim element shall be construed as a means-plus-function unless the element is expressly recited using the phrase "means for...".

[0148] As used herein, the phrase "based on" should not be construed to refer 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 construed as "at least based on A", unless stated otherwise specifically.

[0149] The following aspects are merely illustrative and can be combined with other aspects or teachings described herein without limitation.

[0150] Aspect 1 is a method for wireless communication at a UE, the method comprising: receiving information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation; receiving a configuration of an SBFD format comprising at least a first sub-band for uplink communication and a second sub-band for downlink communication; and receiving an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols.

[0151] Aspect 2 is the method according to aspect 1, the method further comprising: communicating with a network node using an adjusted SBFD format based on the indication.

[0152] Aspect 3 is the method according to any one of aspects 1 to 2, wherein the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for the SBFD operation to change to at least one of the following: downlink reception in the first sub-band, or uplink transmission in the second sub-band.

[0153] Aspect 4 is the method according to aspect 3, wherein the indication is included in a time slot format indicator (SFI).

[0154] Aspect 5 is the method according to aspect 4, wherein the SFI is included in group common downlink control information (DCI).

[0155] Aspect 6 is the method according to aspect 3, wherein the indication is included in radio resource control (RRC) signaling or scheduling downlink control information (DCI) for the UE.

[0156] Aspect 7 is the method according to aspect 6, wherein the indication comprises one or more bits of the scheduling DCI, the one or more bits indicating a conversion of the SBFD format for at least one sub-band for one or more symbols or one or more time slots indicated for the SBFD operation.

[0157] Aspect 8 is the method according to aspect 3, wherein the indication is included in downlink control information (DCI) that does not schedule data transmission for the UE.

[0158] Aspect 9 is the method according to any one of aspects 1 to 8, the method further comprising: before receiving the indication, indicating support for the ability of one or more of the following: downlink reception within an uplink subband in the SBFD format, or uplink transmission outside the uplink subband in the SBFD format.

[0159] Aspect 10 is the method according to any one of aspects 1 to 9, wherein the indication updates the SBFD format for the subset of the set of time slots or the set of symbols corresponding to one or more of the following: semi-persistent scheduling (SPS) occasion for downlink communication in the first subband, configured grant (CG) occasion for uplink communication in the second subband, or periodic signaling occasion for the downlink communication in the first subband or the uplink communication in the second subband.

[0160] Aspect 11 is the method according to any one of aspects 1 to 10, wherein the indication updates the SBFD format for downlink reception in the first subband, the method further comprising: discarding uplink transmission in the first subband during at least the subset of the set of time slots or the set of symbols; and receiving downlink transmission in the first subband and the second subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0161] Aspect 12 is the method according to any one of aspects 1 to 10, wherein the indication updates the SBFD format for uplink transmission in the second subband, the method further comprising: discarding downlink reception in the second subband during at least the subset of the set of time slots or the set of symbols; and transmitting uplink signals in the second subband and the first subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

[0162] Aspect 13 is the method according to any one of aspects 1 to 12, wherein the SBFD operation is for a network node.

[0163] Aspect 14 is a method for wireless communication at a network node. The method includes: outputting information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation; outputting a configuration in SBFD format including at least a first sub-band for uplink communication and a second sub-band for downlink communication; and outputting an indication for updating the SBFD format for at least a subset of the set of time slots or the set of symbols.

[0164] Aspect 15 is the method according to aspect 14, the method further includes: communicating with at least one UE using an adjusted SBFD format based on the indication.

[0165] Aspect 16 is the method according to any one of aspects 14 to 15, wherein the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for the SBFD operation to change to at least one of the following: downlink reception in the first sub-band, or uplink transmission in the second sub-band.

[0166] Aspect 17 is the method according to aspect 16, wherein the indication is included in a slot format indicator (SFI).

[0167] Aspect 18 is the method according to aspect 17, wherein the SFI is included in group common downlink control information (DCI).

[0168] Aspect 19 is the method according to aspect 16, wherein the indication is included in radio resource control (RRC) signaling for the UE or scheduling downlink control information (DCI).

[0169] Aspect 20 is a device for wireless communication at a UE. The device includes: a memory; and at least one processor, the at least one processor being coupled to the memory and configured to implement any one of aspects 1 to 13.

[0170] In aspect 21, the device according to aspect 20 further includes: at least one transceiver coupled to the at least one processor, wherein the at least one processor is configured to receive the indication via the at least one transceiver.

[0171] Aspect 22 is a device for wireless communication at a network node. The device includes: a memory; and at least one processor, the at least one processor being coupled to the memory and configured to implement any one of aspects 14 to 19.

[0172] In aspect 23, the apparatus according to aspect 22 further comprises: at least one transceiver coupled to the at least one processor, wherein the at least one processor is configured to output the indication via the at least one transceiver.

[0173] Aspect 24 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 13.

[0174] Aspect 25 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 14 to 19.

[0175] Aspect 26 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer-executable code which, when executed by at least one processor, causes the at least one processor to implement any one of aspects 1 to 13.

[0176] Aspect 27 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer-executable code which, when executed by at least one processor, causes the at least one processor to implement any one of aspects 14 to 19.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: a memory; and at least one processor coupled to the memory and configured to: receive information indicating a set of time slots or a set of symbols for sub-band full duplex (SBFD) operation; receive a configuration of an SBFD format comprising at least a first sub-band for uplink communication and a second sub-band for downlink communication; and receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols.

2. The apparatus according to claim 1, wherein the at least one processor is further configured to: communicate with a network node using an adjusted SBFD format based on the indication.

3. The apparatus according to claim 1, wherein the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for the SBFD operation to change to at least one of the following: downlink reception in the first sub-band, or uplink transmission in the second sub-band.

4. The apparatus according to claim 1, wherein the indication is included in a slot format indicator (SFI).

5. The apparatus according to claim 4, wherein the SFI is included in group common downlink control information (DCI).

6. The apparatus according to claim 1, wherein the indication is included in radio resource control (RRC) signaling or scheduling downlink control information (DCI) for the UE.

7. The apparatus according to claim 6, wherein the indication comprises one or more bits of the scheduling DCI, the one or more bits indicating a conversion of at least one sub-band of the SBFD format for one or more symbols or one or more time slots indicated for the SBFD operation.

8. The apparatus according to claim 1, wherein the indication is included in downlink control information (DCI) that does not schedule data transmission for the UE.

9. The apparatus according to claim 1, wherein the at least one processor is further configured to: indicate support for one or more of the following capabilities before receiving the indication: downlink reception within an uplink sub-band of the SBFD format, or uplink transmission outside the uplink sub-band of the SBFD format.

10. The apparatus according to claim 1, wherein the indication updates the SBFD format for the subset of the set of time slots or the set of symbols corresponding to one or more of the following: a semi-persistent scheduling (SPS) occasion for downlink communication in the first sub-band, a configured grant (CG) occasion for uplink communication in the second sub-band, or a periodic signaling occasion for the downlink communication in the first sub-band or the uplink communication in the second sub-band.

11. The apparatus according to claim 1, wherein the indication updates the SBFD format for downlink reception in the first subband, and the at least one processor is further configured to: discard uplink transmissions in the first subband during at least the subset of the set of time slots or the set of symbols; and receive downlink transmissions in the first subband and the second subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

12. The apparatus according to claim 1, wherein the indication updates the SBFD format for uplink transmission in the second subband, and the at least one processor is further configured to: discard downlink reception in the second subband during at least the subset of the set of time slots or the set of symbols; and transmit uplink signals in the second subband and the first subband in one or more time slots or symbols in the subset of the set of time slots or the set of symbols.

13. The apparatus according to claim 1, wherein the SBFD operation is for a network node, and the apparatus further comprises: at least one transceiver coupled to the at least one processor, wherein the at least one processor is configured to receive the indication via the at least one transceiver and operate in a half-duplex mode.

14. An apparatus for wireless communication at a network node, the apparatus comprises: a memory; and at least one processor coupled to the memory and configured to: output information indicating a set of time slots or a set of symbols for subband full-duplex (SBFD) operation; output a configuration of the SBFD format including at least a first subband for uplink communication and a second subband for downlink communication; and output an indication updating the SBFD format for at least a subset of the set of time slots or the set of symbols.

15. The apparatus according to claim 14, wherein the at least one processor is further configured to: communicate with at least one UE using an adjusted SBFD format based on the indication.

16. The apparatus according to claim 14, wherein the indication adjusts the SBFD format for one or more symbols or one or more time slots indicated for the SBFD operation to change to at least one of the following: downlink reception in the first subband, or uplink transmission in the second subband.

17. The apparatus according to claim 14, wherein the indication is included in a slot format indicator (SFI).

18. The apparatus according to claim 17, wherein the SFI is included in group common downlink control information (DCI).

19. The apparatus according to claim 14, wherein the indication is included in radio resource control (RRC) signaling or scheduling downlink control information (DCI) for a UE.

20. A method for wireless communication at a user equipment (UE), the method comprises: Receive information indicating a set of time slots or a set of symbols for sub-band full-duplex (SBFD) operation; Receive a configuration in an SBFD format including at least a first sub-band for uplink communication and a second sub-band for downlink communication; And Receive an indication instructing the UE to update the SBFD format for at least a subset of the set of time slots or the set of symbols.

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