Sub-band configuration in full duplex systems

Abstract

An apparatus and method for utilizing sub-band configuration in a full duplex system are provided. A method of operating a user equipment (UE) includes receiving first information of a first set of parameters of a first frequency domain sub-band associated with an uplink (UL) bandwidth for transmissions on a cell; receiving second information of a second set of parameters for a second frequency domain sub-band associated with a received downlink (DL) bandwidth on the cell; and determining a third frequency domain sub-band on the symbol based on the first frequency domain sub-band, the second frequency domain sub-band and the reference bandwidth. The method also includes receiving or transmitting on a symbol. The frequency domain resources of the third frequency domain subband are not available for reception or transmission on symbols on the cell.

Description

Technical Field

[0001] The present disclosure generally relates to wireless communication systems, and more particularly, to sub-band configurations in full-duplex systems. Background Art

[0002] The 5th generation (5G) mobile communication technology defines wide frequency bands, enabling high transmission rates and new services, and can be implemented not only in the "sub-6 GHz" frequency bands such as 3.5 GHz, but also in the "above-6 GHz" frequency bands (including 28 GHz and 39 GHz) known as millimeter waves. In addition, the 6th generation (6G) mobile communication technology (referred to as the ultra-5G system) has been considered for implementation in the terahertz frequency band (e.g., the 95 GHz to 3 THz frequency band) in order to achieve a transmission rate fifty times faster than that of the 5G mobile communication technology and an ultra-low latency that is one-tenth of that of the 5G mobile communication technology.

[0003] At the beginning of the development of the 5G mobile communication technology, in order to support services and meet the performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine type communication (mMTC), standardization has been ongoing for the following technologies: beamforming and massive multiple-input multiple-output (MIMO) for reducing radio wave path loss in millimeter waves and increasing radio wave transmission distance; support for parameter sets (e.g., operating multiple subcarrier spacings) for efficient utilization of millimeter wave resources and dynamic operation of time slot formats; initial access technologies for supporting multi-beam transmission and broadband; definition and operation of bandwidth parts (BWPs); new channel coding methods such as low-density parity-check (LDPC) codes for large data transmission and polar codes for highly reliable transmission of control information; L2 preprocessing; and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services supported by the 5G mobile communication technology, discussions are underway regarding the improvement and performance enhancement of the initial 5G mobile communication technology, and physical layer standardization already exists for technologies such as vehicle-to-everything (V2X) for assisting driving decisions through autonomous vehicles based on information about the position and status of vehicles transmitted by the vehicles and for improving user convenience, new radio unlicensed (NR-U) for system operation aimed at meeting various regulatory requirements in unlicensed frequency bands, NR UE energy saving, non-terrestrial networks (NTNs) as UE-satellite direct communication for providing coverage in areas where terrestrial network communication is unavailable, and positioning.

[0005] In addition, technologies such as the following are being continuously standardized in terms of air interface architecture / protocols: Industrial Internet of Things (IIoT) for supporting new services through interoperability and integration with other industries; Integrated Access and Backhaul (IAB) for extending the network service area by supporting wireless backhaul links and access links in an integrated manner; Mobility enhancements including Conditional Handover and Dual-Active Protocol Stack (DAPS) handover; and Two-Step Random Access (2-Step RACH for NR) for simplifying the random access process. Technologies such as the following are also being continuously standardized in terms of system architecture / services: 5G baseline architecture for combining Network Function Virtualization (NFV) and Software Defined Network (SDN) technologies (e.g., service-based architecture or service-based interface), and Mobile Edge Computing (MEC) for receiving services based on UE location.

[0006] With the commercialization of 5G mobile communication systems, the exponentially growing connected devices will be connected to the communication network, and thus it is expected that the functions and performance of 5G mobile communication systems and the integrated operation of connected devices will need to be enhanced. For this purpose, new research related to the following technologies is planned: Extended Reality (XR) for effectively supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR), etc.; improving 5G performance and reducing complexity by leveraging Artificial Intelligence (AI) and Machine Learning (ML); AI service support; Metaverse service support; and drone communication.

[0007] In addition, this development of 5G mobile communication systems will not only serve as the basis for developing the following technologies: new waveforms for providing coverage in the terahertz band for 6G mobile communication technology; multi-antenna transmission technologies such as Full-Dimension MIMO (FD-MIMO), array antennas, and large antennas; metamaterial-based lenses and antennas for improving the coverage of terahertz band signals; high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM); and Reconfigurable Intelligent Surface (RIS), but also serve as the basis for developing the following technologies: full-duplex technology for increasing the frequency efficiency of 6G mobile communication technology and improving the system network; AI-based communication technology for achieving system optimization by leveraging satellites and AI from the design phase and internalizing end-to-end AI support functions; and next-generation distributed computing technology for implementing services with a complexity level exceeding the limit of UE operating capabilities by leveraging ultra-high-performance communication and computing resources.

[0008] With all the technical activities worldwide targeting various candidate technologies from industry and academia, the momentum of 5G or New Radio (NR) mobile communications has been increasing recently. The candidate enablers of 5G / NR mobile communications include: massive antenna technology, from traditional cellular bands to high frequencies, to provide beamforming gain and support increased capacity; new waveforms (e.g., new radio access technology (RAT)) for flexibly adapting to various services / applications with different requirements; new multiple access schemes for supporting massive connections, and so on. Summary of the Invention

[0009] Technical Problem

[0010] This disclosure relates to subband configuration in a full-duplex system.

[0011] Technical Solution

[0012] In an embodiment, a method performed by a user equipment (UE) is provided. The method includes: receiving first information of a first set of parameters of a first frequency-domain subband associated with an uplink (UL) bandwidth for transmission on a cell; receiving second information of a second set of parameters of a second frequency-domain subband associated with a downlink (DL) bandwidth for reception on the cell; and determining a third frequency-domain subband on a symbol based on the first frequency-domain subband, the second frequency-domain subband, and a reference bandwidth. At least one of the first frequency-domain subband and the second frequency-domain subband is one of a subband full-duplex (SBFD) DL subband, an SBFD flexible subband, or an SBFD UL subband. The reference bandwidth is one of a carrier bandwidth, a bandwidth part (BWP), or a frequency-domain allocation having an upper limit and a lower limit. The method further includes receiving or transmitting on a symbol. The frequency-domain resources of the third frequency-domain subband are not available for receiving or transmitting on a symbol on the cell.

[0013] In another embodiment, a UE is provided. The UE includes a transceiver configured to: receive first information of a first set of parameters of a first frequency-domain subband associated with an UL bandwidth for transmission on a cell; and receive second information of a second set of parameters of a second frequency-domain subband associated with a DL bandwidth for reception on the cell. The UE further includes a processor configured to determine a third frequency-domain subband on a symbol based on the first frequency-domain subband, the second frequency-domain subband, and a reference bandwidth. At least one of the first frequency-domain subband and the second frequency-domain subband is one of an SBFD DL subband, an SBFD flexible subband, or an SBFD UL subband. The reference bandwidth is one of a carrier bandwidth, a BWP, or a frequency-domain allocation having an upper limit and a lower limit. The transceiver is further configured to receive or transmit on a symbol. The frequency-domain resources of the third frequency-domain subband are not available for receiving or transmitting on a symbol on the cell.

[0014] In yet another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to: transmit first information of a first set of parameters of a first frequency domain subband associated with an UL bandwidth for reception on a cell; and transmit second information of a second set of parameters of a second frequency domain subband associated with a DL bandwidth for transmission on a cell. The BS further includes a processor configured to determine a third frequency domain subband on a symbol based on the first frequency domain subband, the second frequency domain subband, and a reference bandwidth. At least one of the first frequency domain subband and the second frequency domain subband is one of an SBFD DL subband, an SBFD flexible subband, or an SBFD UL subband. The reference bandwidth is one of a carrier bandwidth, a BWP, or a frequency domain allocation having an upper limit and a lower limit. The transceiver is further configured to receive or transmit on a symbol. The frequency domain resources of the third frequency domain subband are not available for reception or transmission on a symbol on the cell.

[0015] Those skilled in the art will readily appreciate other technical features from the following drawings, description, and claims.

[0016] Before proceeding with the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with each other. The terms "transmit," "receive," and "communicate," and their derivatives, cover both direct and indirect communication. The terms "include" and "comprise," and their derivatives, mean including but not limited to. The term "or" is inclusive and means and / or. The phrase "associated with," and its derivatives, means including, being included within, interconnecting with, containing, being contained within, connecting to or being connected with, coupling to or being coupled with, capable of communicating with, cooperating with, interlacing, juxtaposing, being adjacent to, being bound to or being bound with, having, having the properties of, having a relationship to or being related to, and the like. The term "controller" refers to any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and / or firmware. The functions associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0017] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed of computer-readable program code and embodied in a computer-readable medium. The terms "application program" and "program" refer to one or more computer programs, software components, instruction sets, steps, functions, objects, classes, instances, related data, or portions thereof that are adapted to be implemented with suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, optical disk (CD), digital video disk (DVD), or any other type of memory. A "non-transitory" computer-readable medium excludes wired, wireless, optical, or other communication links that transmit transient electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data, as well as media that can store data and then rewrite the data, such as rewritable optical disks or erasable memory devices.

[0018] Definitions of other specific words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that, in many if not most instances, such definitions apply to the prior and future use of such defined words and phrases.

[0019] Advantages of the Invention

[0020] According to embodiments of the present disclosure, UE throughput and spectral efficiency can be improved.

[0021] In addition, according to embodiments of the present disclosure, the implementation complexity of a UE modem for supporting full-duplex operation can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more fully understand the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0023] Figure 1 An example wireless network according to embodiments of the present disclosure is shown;

[0024] Figure 2 An example base station according to embodiments of the present disclosure is shown;

[0025] Figure 3 An example user equipment (UE) according to embodiments of the present disclosure is shown;

[0026] Figure 4A An example wireless transmit path according to embodiments of the present disclosure is shown;

[0027] Figure 4B Shows an example wireless receive path according to an embodiment of the present disclosure;

[0028] Figure 5 Shows a transmitter block diagram for a Physical Downlink Shared Channel (PDSCH) in a time slot according to an embodiment of the present disclosure;

[0029] Figure 6 Shows a receiver block diagram for a PDSCH in a time slot according to an embodiment of the present disclosure;

[0030] Figure 7 Shows a transmitter block diagram for a Physical Uplink Shared Channel (PUSCH) in a time slot according to an embodiment of the present disclosure;

[0031] Figure 8 Shows a receiver block diagram for a PUSCH in a time slot according to an embodiment of the present disclosure;

[0032] Figure 9 Shows an example antenna block or array forming a beam according to an embodiment of the present disclosure;

[0033] Figure 10 Shows an example uplink / downlink (UL-DL) frame configuration in a Time Division Duplex (TDD) communication system configuration according to various embodiments of the present disclosure;

[0034] Figure 11 Shows an example UL-DL frame configuration in a Full Duplex (FD) communication system according to various embodiments of the present disclosure;

[0035] Figure 12 Shows an example for guard band determination based on sub-band full duplex (SBFD) UL and DL sub-bands according to various embodiments of the present disclosure;

[0036] Figure 13 Shows an example user equipment (UE) processing flow chart for guard band determination according to various embodiments of the present disclosure;

[0037] Figure 14 Shows a diagram for SBFD DL sub-band determination based on an SBFD UL sub-band and an SBFD guard band according to various embodiments of the present disclosure;

[0038] Figure 15 Shows a flow chart of a UE process for SBFD DL sub-band determination according to various embodiments of the present disclosure;

[0039] Figure 16 Shows a flow chart for determining an SBFD sub-band configuration based on a reference Bandwidth Part (BWP) according to various embodiments of the present disclosure;

[0040] Figure 17 A diagram showing DL schedulable symbols / slots of RRC associated with a UL subband configuration according to an embodiment of the present disclosure;

[0041] Figure 18 A UE processing flow chart for determining DL schedulable symbols / slots of RRC associated with a UL subband configuration according to an embodiment of the present disclosure;

[0042] Figure 19 A diagram showing an SBFD subband configuration with separate RRC provision for RRC_IDLE and RRC_CONNECTED according to an embodiment of the present disclosure;

[0043] Figure 20 A UE processing flow chart for determining an applicable SBFD subband configuration associated with an RRC state according to further embodiments of the present disclosure. Detailed Description

[0044] The following discussion Figures 1 to 20 and the various embodiments used in this patent document to describe the principles of the present disclosure are for illustrative purposes only and should not be construed in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0045] The following documents and standards are hereby incorporated by reference as if fully set forth herein: 3GPP NR specification, 3GPP TS 38.211 v17.2.0, "NR; Physical channels and modulation (NR: Physical channels and modulation)" (REF1); 3GPP TS 38.212 v17.2.0, "NR; Multiplexing and Channel coding (NR: Multiplexing and Channel coding)" (REF2); 3GPP TS 38.213 v17.2.0, "NR; Physical Layer Procedures for Control (NR: Physical Layer Procedures for Control)" (REF3); 3GPP TS 38.214 v17.2.0, "NR; Physical Layer Procedures for Data (NR: Physical Layer Procedures for Data)" (REF4); 3GPP TS 38.321 v17.1.0, "NR; Medium Access Control (MAC) protocol specification (NR: Medium Access Control (MAC) protocol specification)" (REF5); 3GPP TS 38.331 v17.1.0, "NR; Radio Resource Control (RRC) Protocol Specification (NR: Radio Resource Control (RRC) Protocol Specification)" (REF6); and 3GPP TS 38.306 v17.1.0, "NR; User Equipment (UE) radio access capabilities (NR: User Equipment (UE) radio access capabilities)" (REF7); 3GPP TS 38.101-1 v.16.6.0, "NR; UE radio transmission and reception; Part 1: Range 1 Standalone (NR: UE radio transmission and reception; Part 1: Range 1 Standalone)" (REF8); 3GPP TS 38.101-2 v.16.9.0, "NR; UE radio transmission and reception; Part 2: Range 2 Standalone (NR: UE radio transmission and reception; Part 2: Range 2 Standalone)" (REF9); 3GPP TS 38.101-3 v.16.9.0, "NR; UE radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios (NR: UE radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios)" (REF10); and 3GPP TS 38.133 v16.8.0, "NR; Requirements for support of radio resource management (NR: Requirements for support of radio resource management)" (REF11).

[0046] To meet the increasing demand for wireless data traffic since the deployment of 4G communication systems and to enable various vertical applications, 5G / NR communication systems have been deployed and are currently being deployed. 5G / NR communication systems are considered to be implemented in higher frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. To reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technology are discussed in 5G / NR communication systems.

[0047] In addition, in 5G / NR communication systems, the development of system network improvements is being carried out based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), receiver interference cancellation, etc.

[0048] The discussion of 5G systems and the frequency bands associated with them is for reference because certain embodiments of the present disclosure can be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or the frequency bands associated with them, and embodiments of the present disclosure can be used in combination with any frequency band. For example, aspects of the present disclosure can also be applied to the deployment of 5G communication systems, 6G, or even higher versions that can use the terahertz (THz) band.

[0049] The following Figures 1 to 3 describes various embodiments implemented in a wireless communication system and using orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) communication techniques. Figures 1 to 3The description is not intended to imply physical or architectural limitations on which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communication system.

[0050] Figure 1 Shows an example wireless network according to an embodiment of the present disclosure. Figure 1 The illustrated embodiment of the wireless network is for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0051] As Figure 1 Shown, the wireless network includes gNB 101 (e.g., a base station, BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (e.g., the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0052] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within the coverage area 120 of gNB 102. The first plurality of UEs includes: UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device, such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within the coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101 to 103 may use 5G / NR, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies to communicate with each other and with UEs 111 to 116.

[0053] Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmit-receive point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a Wi-Fi access point (AP), or other wireless-enabled device. The base station may provide wireless access according to one or more wireless communication protocols, such as 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), LTE Advanced (LTE-A), High-Speed Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" may be used interchangeably in this patent document to refer to the network infrastructure components that provide wireless access to remote terminals. Additionally, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station", "subscriber station", "remote terminal", "wireless terminal", "receiving point", or "user device". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to the remote wireless devices that wirelessly access the BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or a device that is generally considered stationary (such as a desktop computer or vending machine).

[0054] The dashed lines illustrate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that the coverage areas associated with the gNB (such as coverage areas 120 and 125) may have other shapes, including irregular shapes, depending on the configuration of the gNB and the variations in the radio environment associated with natural and man-made obstacles.

[0055] As described in more detail below, one or more of UEs 111 to 116 include circuitry, programming, or a combination thereof for identifying and / or exploiting subband configurations in a full-duplex system. In certain embodiments, one or more of BSs 101 to 103 include circuitry, programming, or a combination thereof for identifying and / or exploiting subband configurations in a full-duplex system.

[0056] Although Figure 1 an example of a wireless network is shown, Figure 1Make various changes. For example, the wireless network can include any number of gNBs and any number of UEs in any suitable arrangement. Additionally, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each of gNBs 102 to 103 can communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. Furthermore, gNBs 101, 102, and / or 103 can provide access to other or additional external networks (e.g., an external telephone network or other types of data networks).

[0057] Figure 2 Shows an exemplary gNB 102 according to an embodiment of the present disclosure. Figure 2 The illustrated embodiment of gNB 102 is for illustrative purposes only, and Figure 1 gNBs 101 and 103 can have the same or similar configurations. However, gNBs have various configurations, and Figure 2 the scope of the present disclosure will not be limited to any particular implementation of gNBs.

[0058] As Figure 2 shown, gNB 102 includes a plurality of antennas 205a to 205n, a plurality of transceivers 210a to 210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0059] Transceivers 210a to 210n receive incoming RF signals, such as signals transmitted by UEs in network 100, from antennas 205a to 205n. Transceivers 210a to 210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuitry in transceivers 210a to 210n and / or controller / processor 225, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. Controller / processor 225 can further process the baseband signal.

[0060] Transmit (TX) processing circuitry in transceivers 210a to 210n and / or controller / processor 225 receives analog or digital data (e.g., voice data, network data, email, or interactive video game data) from controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. Transceivers 210a to 210n up-convert the baseband or IF signal to an RF signal transmitted via antennas 205a to 205n.

[0061] The controller / processor 225 may include one or more processors or other processing devices that control all operations of the gNB 102. For example, the controller / processor 225 may control the RF transceivers 210a to 210n to receive UL channel signals and transmit DL channel signals according to well-known principles. The controller / processor 225 may also support additional functions, such as more advanced wireless communication functions. For example, the controller / processor 225 may support beamforming or directional routing operations, where the outgoing / incoming signals from / to the multiple antennas 205a to 205n are weighted differently to effectively direct the outgoing signals in the desired direction. The controller / processor 225 may support any of various other functions in the gNB 102.

[0062] The controller / processor 225 is also capable of executing programs and other processes residing in the memory 230, such as processes for identifying and / or exploiting subband configurations in a full-duplex system, as described in more detail below. The controller / processor 225 may move data into or out of the memory 230 as needed for executing processes.

[0063] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 may support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (e.g., a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate with a larger network (e.g., the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure that supports communication via a wired or wireless connection (e.g., Ethernet or a transceiver).

[0064] The memory 230 is coupled to the controller / processor 225. A portion of the memory 230 may include RAM, and another portion of the memory 230 may include flash memory or other ROM.

[0065] Although Figure 2 an example of the gNB 102 is shown, various changes may be made Figure 2 to it. For example, the gNB 102 may include Figure 2 any number of each component shown. Additionally, Figure 2 the various components in it may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0066] Figure 3 Shows an example UE 116 according to an embodiment of the present disclosure. Figure 3 The illustrated embodiment of UE 116 is for illustration only, and Figure 1 UEs 111 to 115 may have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 the scope of the present disclosure will not be limited to any particular implementation of the UE.

[0067] As Figure 3 shown, UE 116 includes an antenna 305, a transceiver 310, and a microphone 320. UE 116 also includes a speaker 330, a processor 340, an input / output (I / O) interface (IF) 345, an input terminal 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0068] The transceiver 310 receives incoming RF signals transmitted by the gNB of the network 100 from the antenna 305. The transceiver 310 down-converts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is processed by RX processing circuitry in the transceiver 310 and / or the processor 340, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. The RX processing circuitry sends the processed baseband signal to the speaker 330 (e.g., for voice data) or is processed by the processor 340 (e.g., for web browsing data).

[0069] TX processing circuitry in the transceiver 310 and / or the processor 340 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (e.g., web data, email, or interactive video game data) from the processor 340. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal transmitted via the antenna 305.

[0070] The processor 340 may include one or more processors or other processing devices, and executes the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the transceiver 310 to receive DL channel signals and transmit UL channel signals according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0071] The processor 340 is also capable of executing other processes and programs resident in the memory 360. For example, the processor 340 may execute processes for identifying and / or utilizing sub-band configurations in a full-duplex system as described in embodiments of the present disclosure. The processor 340 may move data into or out of the memory 360 as needed for executing processes. In some embodiments, the processor 340 is configured to execute the application program 362 based on the OS 361 or in response to signals received from the gNB or the operator. The processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices (such as laptops and handheld computers). The I / O interface 345 is a communication path between these accessories and the processor 340.

[0072] The processor 340 is also coupled to an input terminal 350 (which includes, for example, a touch screen, a keypad, etc.) and a display 355. The operator of the UE 116 may use the input terminal 350 to input data into the UE 116. The display 355 may be a liquid crystal display, a light-emitting diode display, or other display capable of presenting, for example, text and / or at least limited graphics from a website.

[0073] The memory 360 is coupled to the processor 340. A portion of the memory 360 may include random access memory (RAM), and another portion of the memory 360 may include flash memory or other read-only memory (ROM).

[0074] Although Figure 3 an example of the UE 116 is shown, various changes may be made to Figure 3 it. For example, Figure 3 the various components in Figure 3 may be combined, further subdivided, or omitted, and additional components may be added according to specific needs. As a specific example, the processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In another example, the transceiver 310 may include any number of transceivers and signal processing chains and may be connected to any number of antennas. Additionally, although

[0075] Figures 4A to 4B an example wireless transmit and receive path according to the present disclosure is shown. In the following description, Figure 4A the transmit path 400 in Figure 4BThe receiving path 450 can be described as implemented in a UE (e.g., UE 116). However, it can be understood that the receiving path 450 can be implemented in the BS, and the transmitting path 400 can be implemented in the UE. In some embodiments, the receiving path 450 is configured to identify and / or utilize sub-band configurations in a full-duplex system, as described in the embodiments of the present disclosure.

[0076] As Figure 4A shown, the transmitting path 400 includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, an inverse fast Fourier transform (IFFT) block 415 of size N, a parallel-to-serial (P-to-S) block 420, a cyclic prefix addition block 425, and an up-conversion converter (UC) 430. As Figure 4B shown, the receiving path 450 includes a down-conversion converter (DC) 455, a cyclic prefix removal block 460, a serial-to-parallel (S-to-P) block 465, a fast Fourier transform (FFT) block 470 of size N, a parallel-to-serial (P-to-S) block 475, and a channel decoding and demodulation block 480.

[0077] As Figure 4A shown, the channel coding and modulation block 405 receives a set of information bits, applies coding (e.g., low-density parity-check (LDPC) coding) and modulates the input bits (e.g., with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel block 410 converts (e.g., demultiplexes) the serially modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in gNB 102 and UE 116. The IFFT block 415 of size N performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from the IFFT block 415 of size N to generate a serial time-domain signal. The cyclic prefix addition block 425 inserts a cyclic prefix into the time-domain signal. The up-conversion converter 430 modulates (e.g., up-converts) the output of the cyclic prefix addition block 425 to an RF frequency for transmission via the wireless channel. The signal can also be filtered at baseband before conversion to the RF frequency.

[0078] The RF signal transmitted from gNB 102 reaches the UE (e.g., 116) after passing through the wireless channel, and operations opposite to those at gNB 102 are performed at the UE (e.g., 116).

[0079] As Figure 4BAs shown, down-converter 455 down-converts the received signal to baseband frequency, and cyclic prefix removal block 460 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 465 converts the time-domain baseband signal to a parallel time-domain signal. FFT block 470 of size N performs the FFT algorithm to generate N parallel frequency-domain signals. Parallel-to-serial block 475 converts the parallel frequency-domain signals to a sequence of modulated data symbols. Channel decoding and demodulation block 480 demodulates and decodes the modulated symbols to recover the original input data stream.

[0080] Each of gNBs 101 to 103 may implement a transmit path 400 similar to that shown for transmitting to UEs 111 to 116 in the downlink, and may implement a receive path 500 similar to that shown for receiving from UEs 111 to 116 in the uplink. Figure 4A As shown, and may implement a receive path 500 similar to that shown for receiving from UEs 111 to 116 in the uplink. Figure 4B Similarly, each of UEs 111 to 116 may implement a transmit path 400 for transmitting to gNBs 101 to 103 in the uplink, and may implement a receive path 500 for receiving from gNBs 101 to 103 in the downlink.

[0081] Each of the components in and may be implemented using hardware or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGS. 4 and Figure 4A and Figure 4B may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 470 and IFFT block 515 may be implemented as configurable software algorithms, where the value of size N may be modified according to the implementation. Figure 4B may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 470 and IFFT block 515 may be implemented as configurable software algorithms, where the value of size N may be modified according to the implementation.

[0082] Furthermore, although described as using FFT and IFFT, this is by way of illustration only and should not be construed as limiting the scope of the present disclosure. Other types of transforms may be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It can be appreciated that the value of variable N may be any integer for DFT and IDFT functions (such as 1, 2, 3, 4, etc.), while the value of variable N for FFT and IFFT functions may be any integer that is a power of two (such as 1, 2, 4, 8, 16, etc.). FIGS. 4 and Figure 5 may generally also be implemented using TDD UL-DL operation.

[0083] Although Figures 4A to 4B shows an example of a wireless transmit and receive path, various changes may be made to Figures 4A to 4B . For example, Figures 4A to 4BThe various components in Figures 4A to 4B are intended to show examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0084] A communication system can include a downlink (DL) and an uplink (UL). The downlink refers to the transmission from a base station (such as BS102) or one or more transmission points to a UE (such as UE 116), and the uplink refers to the transmission from a UE (such as UE 116) to a base station (such as BS102) or one or more reception points.

[0085] The time unit for DL signaling or UL signaling on a cell is called a time slot and can include one or more symbols. Symbols can also be used as additional time units. The frequency (or bandwidth (BW)) unit is called a resource block (RB). One RB includes multiple subcarriers (SCs). For example, a time slot can have a duration of 1 millisecond or 0.5 millisecond, include 14 symbols, and an RB can include 12 SCs with an SC spacing of 15 kHz or 30 kHz, etc.

[0086] DL signals include data signals that carry information content, control signals that carry DL control information (DCI), and reference signals (RS) that are also called pilot signals. The gNB transmits data information or DCI through the corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). The PDSCH or PDCCH can be transmitted through a variable number of time slot symbols including one time slot symbol. For simplicity, the DCI format that schedules the PDSCH reception of a UE is called the DL DCI format, while the DCI format that schedules the transmission of the physical uplink shared channel (PUSCH) from a UE is called the UL DCI format.

[0087] The gNB (such as BS102) transmits one or more of various types of RS, including channel state information RS (CSI-RS) and demodulation RS (DM-RS). The CSI-RS is mainly intended for the UE to perform measurements and provide channel state information (CSI) to the gNB. For channel measurements, non-zero power CSI-RS (NZP CSI-RS) resources are used. For interference measurement reporting (IMR), CSI interference measurement (CSI-IM) resources associated with zero-power CSI-RS (ZP CSI-RS) configurations are used. The CSI process consists of NZP CSI-RS and CSI-IM resources.

[0088] A UE (e.g., UE 116) can determine CSI-RS transmission parameters through DL control signaling or higher layer signaling (e.g., radio resource control (RRC) signaling from a gNB (such as BS102)). Transmission instances of CSI-RS can be indicated by DL control signaling or configured by higher layer signaling. DM-RS is only transmitted within the BW of the corresponding PDCCH or PDSCH, and the UE can use DM-RS to demodulate data or control information.

[0089] In some embodiments, the UL signal further includes a data signal for transmitting information content, a control signal for transmitting UL control information (UCI), a DM-RS associated with data or UCI demodulation, a sounding RS (SRS) enabling the gNB to perform UL channel measurements, and a RA preamble enabling the UE to perform RA (see also the NR specification). The UE transmits data information or UCI through the corresponding PUSCH or physical UL control channel (PUCCH). The PUSCH or PUCCH can be transmitted through a variable number of slot symbols including one slot symbol. The gNB can configure the UE to transmit signals on the active UL bandwidth part (BWP) of the cell UL BW in the cell.

[0090] UCI includes HARQ acknowledgment (ACK) information indicating correct or incorrect detection of a data transport block (TB) in the PDSCH, a scheduling request (SR) indicating whether the UE has data in the buffer, and a CSI report enabling the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE. The HARQ-ACK information can be configured to have a finer granularity than each TB, and can be per data code block (CB) or per data CB group, where a TB includes multiple data CBs.

[0091] The CSI report from the UE can include a channel quality indicator (CQI) that notifies the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect a data TB with a predetermined block error rate (BLER) (such as 10% BLER (see the NR specification)), a precoding matrix indicator (PMI) that notifies the gNB of how to combine signals from multiple transmitter antennas according to MIMO transmission principles, and a rank indicator (RI) indicating the transmission rank of the PDSCH.

[0092] UL RS includes DM-RS and SRS. DM-RS is only transmitted within the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DM-RS to demodulate the information in the corresponding PUSCH or PUCCH. SRS is transmitted by the UE to provide UL CSI to the gNB, and for a TDD system, SRS transmission can also provide PMI for DL transmission. Additionally, in order to establish synchronization or an initial high-layer connection with the gNB, the UE can transmit a physical random access channel (PRACH, as shown in the NR specification).

[0093] Antenna ports are defined such that the channel for transmitting another symbol on the same antenna port can be inferred from the channel for transmitting the previous symbol on the antenna port.

[0094] For the DM-RS associated with the PDSCH, the channel for transmitting the PDSCH symbol on the same antenna port can be inferred from the channel for transmitting the DM-RS symbol on the same antenna port only if the two symbols are within the same resource as the scheduled PDSCH, in the same time slot, and in the same precoding resource block group (PRG).

[0095] For the DM-RS associated with the PDCCH, the channel for transmitting the PDCCH symbol on the same antenna port can be inferred from the channel for transmitting the DM-RS symbol on the same antenna port only if the two symbols are within the resource where the UE can assume the same precoding.

[0096] For the DM-RS associated with the physical broadcast channel (PBCH), the channel for transmitting the PBCH symbol on the same antenna port can be inferred from the channel for transmitting the DM-RS symbol on the same antenna port only if the two symbols are within the SS / PBCH block transmitted in the same time slot and have the same block index.

[0097] If the large-scale properties of the channel for transmitting the symbol on one antenna port can be inferred from the channel for transmitting the symbol on another antenna port, then the two antenna ports are considered to be quasi-co-located. The large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0098] The UE (e.g., UE 116) can assume that the synchronization signal (SS) / PBCH block (also denoted as SSB) transmitted at the same center frequency position with the same block index is quasi-co-located in terms of Doppler spread, Doppler shift, average gain, average delay, delay spread, and spatial Rx parameters (when applicable). For any other synchronization signal SS / PBCH block transmission, the UE may not assume quasi-co-location.

[0099] In the absence of CSI-RS configuration and unless otherwise configured, the UE may assume that the PDSCH DM-RS and SSB are quasi-co-located in terms of Doppler shift, Doppler spread, mean delay, delay spread, and spatial Rx parameters (when applicable). The UE may assume that the PDSCH DM-RS within the same code division multiplexing (CDM) group are quasi-co-located in terms of Doppler shift, Doppler spread, mean delay, delay spread, and spatial Rx. The UE may also assume that the DM-RS ports associated with the PDSCH are QCL of type A, type D (when applicable), and mean gain QCL. The UE may further assume that the DM-RS does not conflict with the SS / PBCH block.

[0100] The UE may be configured within the higher layer parameter PDSCH-Config with a list of up to M transmission configuration indication (TCI) state configurations to decode the PDSCH based on the detected PDCCH with DCI intended for the UE and a given serving cell, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI-State contains parameters for configuring the quasi-co-location (QCL) relationship between one or two downlink reference signals and the DM-RS ports of the PDSCH, the DM-RS ports of the PDCCH, or the CSI-RS ports of the CSI-RS resource.

[0101] The quasi-co-location relationship is configured by the higher layer parameters qcl-Type1 for the first DL RS and qcl-Type2 (if configured) for the second DL RS. For the case of two DL RSs, the QCL types may not be the same, regardless of referring to the same or different DL RSs. The quasi-co-location type corresponding to each DL RS is given by the higher layer parameter qcl-Type in the QCL-Info and can take one of the following values:

[0102] - "QCL-TypeA": {Doppler shift, Doppler spread, mean delay, delay spread}

[0103] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0104] - "QCL-TypeC": {Doppler shift, mean delay}

[0105] - "QCL-TypeD": {Spatial Rx parameters}

[0106] The UE receives a MAC-CE activation command to map up to [N] (e.g., N = 8) TCI states to the code points of the DCI field "transmission configuration indication". When transmitting the HARQ-ACK of the PDSCH corresponding to the activation command in slot n, after the MAC-CE application time, for example, starting from the first slot after slot the mapping of the indication between the TCI state and the code point of the DCI field "transmission configuration indication" can be applied, where is the number of slots per subframe for the subcarrier spacing (SCS) configuration μ.

[0107] Figure 5 FIG. 500 shows a transmitter block diagram for the PDSCH in a slot according to an embodiment of the present disclosure. Figure 5 The embodiment of the transmitter block diagram 500 shown is for illustration only. Figure 5 One or more of the components shown may be implemented in a dedicated circuit configured to perform the functions, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions. Figure 5 The scope of the present disclosure will not be limited to any particular implementation of the transmitter block diagram 500.

[0108] As Figure 5 shown, the information bits 510 are encoded by an encoder 520 (e.g., a turbo encoder) and modulated by a modulator 530, for example, using quadrature phase shift keying (QPSK) modulation. A serial-to-parallel (S / P) converter 540 generates M modulated symbols, which are then provided to a mapper 550 to be mapped to the REs selected by the transmit BW selection unit 555 for the assigned PDSCH transmit BW. The unit 560 applies an inverse fast Fourier transform (IFFT), and then a parallel-to-serial (P / S) converter 570 serializes the output to create a time-domain signal, which is filtered by a filter 580, and the signal is transmitted 590. Additional functions such as data scrambling, cyclic prefix insertion, time windowing, interleaving, and other functions are well known in the art and are not shown for simplicity.

[0109] Figure 6 FIG. 600 shows a receiver block diagram for the PDSCH in a slot according to an embodiment of the present disclosure. Figure 6 The embodiment of the diagram 600 shown is for illustration only. Figure 6 One or more of the components shown may be implemented in a dedicated circuit configured to perform the functions, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions. Figure 6 The scope of the present disclosure will not be limited to any particular implementation of the diagram 600.

[0110] As Figure 6 shown, filter 620 filters the received signal 610, BW selector 635 selects REs 630 for the assigned receive BW, unit 640 applies a Fast Fourier Transform (FFT), and parallel-to-serial converter 650 serializes the output. Subsequently, demodulator 660 coherently demodulates the data symbols by applying a channel estimate obtained from the DMRS or CRS (not shown), and decoder 670 (e.g., a turbo decoder) decodes the demodulated data to provide an estimate of the information data bits 680. For simplicity, additional functions such as time windowing, cyclic prefix removal, descrambling, channel estimation, and deinterleaving are not shown.

[0111] Figure 7 FIG. 700 shows a transmitter block diagram for a PUSCH in a time slot according to an embodiment of the present disclosure. Figure 7 The embodiment of the block diagram 700 shown is for illustrative purposes only. Figure 5 One or more of the components shown may be implemented in a dedicated circuit configured to perform the functions, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions. Figure 7 The scope of the present disclosure is not limited to any particular implementation of the block diagram 700.

[0112] As Figure 7 shown, information data bits 710 are encoded by encoder 720 (e.g., a turbo encoder) and modulated by modulator 730. Discrete Fourier Transform (DFT) unit 740 applies a DFT to the modulated data bits, transmit BW selection unit 855 selects REs 750 corresponding to the assigned PUSCH transmit BW, unit 760 applies an IFFT, and after cyclic prefix insertion (not shown), filtering is applied by filter 770 and the signal is transmitted 780.

[0113] Figure 8 FIG. 800 shows a receiver block diagram for a PUSCH in a subframe according to an embodiment of the present disclosure. Figure 8 The embodiment of the block diagram 800 shown is for illustrative purposes only. Figure 8 One or more of the components shown may be implemented in a dedicated circuit configured to perform the functions, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions. Figure 8 The scope of the present disclosure is not limited to any particular implementation of the block diagram 800.

[0114] As Figure 8As shown, filter 820 filters the received signal 810. Subsequently, after removing the cyclic prefix (not shown), unit 830 applies FFT, and the RE 840 corresponding to the assigned PUSCH reception BW is selected by the reception BW selector 845. Unit 850 applies inverse DFT (IDFT), and demodulator 860 coherently demodulates the data symbols by applying the channel estimation obtained from the DMRS (not shown). Decoder 870 (e.g., turbo decoder) decodes the demodulated data to provide an estimate of the information data bits 880.

[0115] Figure 9 An example antenna block or array 900 according to an embodiment of the present disclosure is shown. Figure 9 The embodiment of the antenna block or array 900 shown is for illustrative purposes only. Figure 9 The scope of the present disclosure will not be limited to any particular implementation of the antenna block or array 900.

[0116] The Rel-15 NR specification supports up to 32 CSI-RS antenna ports, which enables the gNB to be equipped with a large number of antenna elements (e.g., 64 or 128). In this case, multiple antenna elements are mapped to one CSI-RS port. For FR2 (e.g., millimeter wave band), although the number of antenna elements can be larger for a given form factor, the number of CSI-RS ports (which can correspond to the number of digital precoding ports) tends to be limited due to hardware limitations (e.g., the feasibility of installing a large number of ADC / DACs at millimeter wave frequencies), as Figure 9 shown. In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 901. One CSI-RS port can then correspond to a subarray that generates a narrow analog beam through analog beamforming 905. This analog beam can be configured to sweep a wide angular range 920 by changing the phase shifter group across symbols or subframes. The number of subarrays (equal to the number of RF chains) is the same as the number of CSI-RS ports N CSI-PORT identical. Digital beamforming unit 910 performs a linear combination across N CSI-PORT analog beams to further increase the precoding gain. Although the analog beam is broadband (and thus not frequency selective), digital precoding can be changed across frequency subbands or resource blocks. Receiver operation can be conceived similarly.

[0117] Since the above system utilizes multiple analog beams for transmission and reception (where one or a small number of analog beams are selected from a large number of analog beams, e.g., after a training duration that is performed from time to time), the term "multi-beam operation" is used to refer to the overall system aspect. For illustrative purposes, this includes indicating the assigned DL or UL transmission (TX) beam (also referred to as "beam indication"), measuring at least one reference signal for calculating and performing beam reporting (also referred to as "beam measurement" and "beam reporting" respectively), and receiving DL or UL transmission via selection of the corresponding receive (RX) beam.

[0118] The above system is also applicable to higher frequency bands, such as FR2-2, e.g., >52.6 GHz. In this case, the system can employ only analog beams. Due to the O 2 absorption loss (an additional loss of approximately 10 dB at a distance of 100 m), a larger number and sharper analog beams (and thus a larger number of radiators in the array) will be required to compensate for the additional path loss.

[0119] In the present disclosure, the frequency resolution (reporting granularity) and span (reporting bandwidth) of CSI or calibration coefficient reporting can be defined according to frequency "sub-bands" and "CSI reporting bands" (CRBs) respectively.

[0120] The sub-band of CSI or calibration coefficient reporting is defined as a set of consecutive PRBs representing the smallest frequency unit of CSI or calibration coefficient reporting. For a given DL system bandwidth value, the number of PRBs in a sub-band can be fixed, semi-statically configured via higher layer / RRC signaling, or dynamically configured via L1 DL control signaling or MAC control element (MAC CE). The number of PRBs in a sub-band can be included in the CSI or calibration coefficient reporting setting. The term "CSI reporting band" is defined as the set / collection of consecutive or non-consecutive sub-bands in which CSI or calibration coefficient reporting is performed. For example, the CSI or calibration coefficient reporting band can include all sub-bands within the DL system bandwidth. This can also be referred to as the "full band". Alternatively, the CSI or calibration coefficient reporting band can include only a set of sub-bands within the DL system bandwidth. This can also be referred to as the "partial band". The term "CSI reporting band" is used only as an example to represent a function. Other terms can also be used, such as "CSI reporting sub-band set" or "CSI or calibration coefficient reporting bandwidth".

[0121] For UE configuration, at least one CSI or calibration coefficient reporting band can be configured for the UE. Such configuration can be semi-static (via higher layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When multiple (N) CSI or calibration coefficient reporting bands are configured (e.g., via RRC signaling), the UE can report CSI associated with n ≤ N CSI reporting bands. For example, for > 6 GHz, a larger system bandwidth may require multiple CSI or calibration coefficient reporting bands. The value of n can be configured semi-statically (via higher layer signaling or RRC) or dynamically (via MAC CE or L1 DL control signaling). Alternatively, the UE can report the recommended value of n via the UL channel.

[0122] Therefore, CSI parameter frequency granularity can be defined according to the CSI reporting band as follows. When one CSI parameter is used for all Mn sub-bands within a CSI reporting band, the CSI parameter is configured with a "single" report for the CSI reporting band that includes the Mn sub-bands. When one CSI parameter is reported for each of the Mn sub-bands within a CSI reporting band, the CSI parameter is configured with a "sub-band" for the CSI reporting band that includes the Mn sub-bands.

[0123] Figure 10 An example uplink-downlink (UL-DL) configuration 1000 of a frame composed of time slots in a time division duplex (TDD) communication system according to an embodiment of the present disclosure is shown. Figure 10 The embodiment of the UL-DL configuration 1000 of the frame in the shown TDD communication system is for illustration only. Figure 10 The scope of the present disclosure will not be limited to any specific implementation of the UL-DL configuration 1000 of the frame in the TDD communication system. As will be described in further detail below, Figure 10 the UL-DL configuration illustrated in can be used to facilitate communication between any of the gNBs (e.g., 101, 102, 103, etc.) and the UE (e.g., 111, 112, 113, etc.).

[0124] 5G NR radios support time division duplex (TDD) operation and frequency division duplex (FDD) operation. The use of FDD or TDD depends on the NR band and the allocation in each country. TDD is required in most bands above 2.5 GHz. Figure 10 An example structure of a time slot or single carrier TDD UL-DL frame configuration for a TDD communication system according to an embodiment of the present disclosure is shown.

[0125] In Figure 10In this context, D represents a DL time slot, U represents a UL time slot, and S represents a special or switching time slot having a DL portion, a flexible portion G that can also be used as a guard period for DL-to-UL switching, and optionally a UL portion.

[0126] TDD has several advantages over FDD. For example, using the same frequency band for DL and UL transmissions results in a simpler UE implementation for TDD as no duplexer is required. Another advantage is that, considering the asymmetry in the ratio of traffic in the two directions, time resources can be flexibly assigned to UL and DL. DL is typically assigned most of the time resources in TDD to handle DL-heavy mobile traffic. Another advantage is that CSI can be obtained more easily through channel reciprocity. This reduces the overhead associated with CSI reporting, especially when there are a large number of antennas.

[0127] Although TDD has advantages over FDD, there are also disadvantages. The present disclosure recognizes that due to the smaller portion of time resources available for UL transmissions, the coverage of TDD is smaller, while for FDD, all time resources can be used. The present disclosure also recognizes that TDD can be affected by latency. In TDD, the timing gap between the reception of DL and the transmission from UL containing hybrid automatic repeat request acknowledgment (HARQ-ACK) information associated with the reception of the UE is typically larger than in FDD, for example, by several milliseconds. Therefore, the HARQ round-trip time in TDD is usually longer than in FDD, especially when the DL traffic load is high. When the physical uplink control channel (PUCCH) providing HARQ-ACK information needs to be retransmitted to improve coverage, this results in an increase in UL user plane latency in TDD and may lead to a loss of data throughput or even HARQ stall (the alternative in this case is for the network to discard the HARQ-ACK message at least for some transport blocks in DL).

[0128] To address some of the disadvantages of TDD operation, dynamic adaptation of the link direction can be utilized. Except for some symbols in some time slots that support scheduled transmissions (e.g., for SSB), the symbols of a time slot can have a flexible direction (e.g., DL or UL) that the UE can determine based on the scheduling information for transmission or reception. The physical downlink control channel (PDCCH) can also be used to provide a DCI format that can indicate the link direction of some flexible symbols in one or more time slots, such as DCI format 2.0 described in REF3. However, in actual deployment, it is difficult for the gNB scheduler to adapt the transmission direction of symbols without coordinating with other gNB schedulers in the network. This is because of cross-link interference (CLI), where, for example, the DL reception of a UE in a cell may experience significant interference from UL transmissions of other UEs in the same or adjacent cells.

[0129] Full-duplex (FD) communication offers the possibility of improving spectral efficiency, increasing capacity, and reducing latency in wireless networks. When using FD communication, the gNB (e.g., 102, 103, etc.) or the UE (e.g., 111, 1112, 113, etc.) simultaneously receives and transmits UL and DL signals on fully or partially overlapping or adjacent frequency resources, thereby improving spectral efficiency and reducing latency in the user and / or control plane.

[0130] There are several options for operating an FD wireless communication system. For example, a single carrier can be used such that transmission and reception are scheduled on the same time-domain resources (e.g., symbols or time slots). Transmission and reception on the same symbol or time slot can be separated in frequency, e.g., by placing them in non-overlapping subbands. In a time-domain resource that also includes a DL frequency subband, the UL frequency subband can be located at the center of the carrier, or at the edge of the carrier, or at a selected frequency-domain position of the carrier. The allocation of the DL subband and the UL subband can also be partially or even fully overlapping. The gNB can use separate physical antennas, antenna ports, antenna panels, and transmitter-receiver units (TRXs) to simultaneously transmit and receive in a time-domain resource. Transmission and reception in FD can also be performed using separate physical antennas, ports, panels, or TRXs. The antennas, ports, panels, or TRXs can also be partially reused, or when FD communication is enabled, only the corresponding subsets can be activated for transmission and reception.

[0131] When the UE receives a signal / channel from the gNB in a full-duplex time slot, the reception can be scheduled in the DL subband of the full-duplex time slot. When full-duplex operation at the gNB uses a DL time slot for scheduling transmissions from the UE using full-duplex transmission and reception at the gNB, there can be one or more (e.g., two) DL subbands in the full-duplex time slot. When the UE is scheduled to transmit in a full-duplex time slot, the transmission can be scheduled in the UL subband of the full-duplex time slot. When full-duplex operation at the gNB uses a UL time slot for the purpose of scheduling transmissions to the UE using full-duplex transmission and reception at the gNB, there can be one or more (e.g., two) UL subbands in the full-duplex time slot. Full-duplex operation using the UL subband or the DL subband can be referred to as subband full-duplex (SBFD).

[0132] For example, when full-duplex operation at the gNB uses DL or F time slots or symbols for scheduling transmissions from the UE using full-duplex transmission and reception at the gNB, there can be a DL sub-band on a full-duplex time slot or symbol and a UL sub-band on the full-duplex time slot or symbol in an NR carrier. The frequency-domain configurations of the DL and UL sub-bands can then be referred to as "DU" or "UD" respectively, depending on whether the UL sub-band is configured / indicated in the upper part or the lower part of the NR carrier. In another example, when full-duplex operation at the gNB uses DL or F time slots or symbols for scheduling transmissions from the UE using full-duplex transmission and reception at the gNB, there can be two DL sub-bands and a UL sub-band on the full-duplex time slot or symbol. When the UL sub-band is configured / indicated in a part of the NR carrier and the DL sub-band is configured / indicated at the edge of the NR carrier, the frequency-domain configuration of the DL and UL sub-bands can be referred to as "DUD".

[0133] Hereinafter, for the sake of brevity, full-duplex time slots / symbols and SBFD time slots / symbols can be collectively referred to as SBFD time slots / symbols, and non-full-duplex time slots / symbols and normal DL or UL time slots / symbols can be referred to as non-SBFD time slots / symbols.

[0134] Instead of using a single carrier, different component carriers (CCs) can also be used for the reception and transmission of the UE. For example, the reception of the UE can be performed on the first CC, and the transmission of the UE can be performed on the second CC having a small (including zero) frequency separation from the first CC. For example, when using carrier-aggregation-based full-duplex operation, the SBFD sub-band can correspond to a component carrier or a part of a component carrier, or parts of multiple component carriers can be used to allocate the SBFD sub-band.

[0135] In one example, the gNB can support full-duplex operation, for example, support simultaneous DL transmission to the UE in the SBFD DL sub-band on the SBFD time slot or symbol and UL reception from the UE in the SBFD UL sub-band. In one example, multiple TRPs can be used on the gNB side to support full-duplex operation. For example, simultaneously on the SBFD time slot or symbol, TRP A can be used for DL transmission to the UE and TRP B can be used for UL reception from the UE.

[0136] Full-duplex operation can be supported by a half-duplex UE or a full-duplex UE. A UE operating in the half-duplex mode can perform transmission or reception, but cannot perform transmission and reception simultaneously on the same symbol. A UE operating in the full-duplex mode can perform transmission and reception simultaneously on the same symbol. For example, the UE can operate in the full-duplex mode on a single NR carrier or based on the use of intra-band or inter-band carrier aggregation.

[0137] For example, when the UE is capable of full-duplex operation, the UE may support SBFD operation based on overlapping or non-overlapping subbands or using one or more UE antenna panels. In one example, an FR2-1 UE may support simultaneous transmission to and reception from the gNB on the same time-domain resources (e.g., symbols or time slots). The UE capable of full-duplex operation may then be configured, scheduled, assigned, or instructed to perform DL reception from the gNB in the SBFD DL subband on the same SBFD symbol (wherein the UE is configured, scheduled, assigned, or instructed to perform UL transmission to the gNB on the SBFD UL subband in the same symbol). In one example, the DL reception of the UE may use a first UE antenna panel, while the UL transmission from the UE may use a second UE antenna panel on the same SBFD symbol / time slot. For example, UE-side self-interference cancellation capabilities may be supported in the UE by a technique or combination of techniques as described in the case of the gNB, e.g., based on spatial isolation provided by the UE antenna or UE antenna panels, or based on analog and / or digital equalization or filtering. In one example, the DL reception of the UE in a first frequency channel, band, or frequency range may use the TRX of the UE antenna or UE antenna panel, while the UL transmission from the UE in a second frequency channel, bandwidth, or frequency range may use the TRX on the same SBFD symbol / time slot. For example, when the UE is capable of full-duplex operation based on the use of carrier aggregation, simultaneous DL reception from the gNB and UL transmission to the gNB on the same symbol may occur on different component carriers.

[0138] Hereinafter, for simplicity, a UE that operates in the half-duplex mode but supports many enhancements for full-duplex operation on the gNB side may be referred to as an SBFD-aware UE. For example, when operating on a serving cell that supports SBFD on the gNB side, the SBFD-aware UE may support time-domain or frequency-domain resource allocation enhancements to improve UL coverage or throughput or spectral efficiency.

[0139] Hereinafter, for simplicity, a UE that operates in the full-duplex mode may be referred to as a UE with SBFD capabilities, or as a UE with full-duplex capabilities, or as a full-duplex UE. The full-duplex UE may support many enhancements for full-duplex operation on the gNB side. For example, when operating on a serving cell, the UE with SBFD capabilities may support time-domain or frequency-domain resource allocation enhancements to improve UL coverage or throughput or spectral efficiency.

[0140] In one example, the gNB may operate in full-duplex (or SBFD) mode, and the UE operates in half-duplex mode. In one example, the gNB may operate in full-duplex (or SBFD) mode, and the UE operates in full-duplex (or SBFD) mode. In one example, the support for full-duplex (or SBFD) operation on the gNB side is based on multiple TRPs, where the TRP may operate in half-duplex mode, and the UE operates in full-duplex mode.

[0141] In one example, the TDD serving cell supports a mix of full-duplex and half-duplex UEs. For example, UE1 supports full-duplex operation and UE2 supports half-duplex operation. When configured, scheduled, assigned, or indicated by the gNB, UE1 can transmit and receive simultaneously in a time slot or symbol. UE2 can transmit or receive in a time slot or symbol, and the DL reception of UE2 and the UL transmission from UE2 cannot occur simultaneously on the same time slot or symbol.

[0142] FD transmit / receive is not limited to gNBs, TRPs, or UEs, but can also be used for other types of wireless nodes such as relays or repeater nodes.

[0143] As recognized in this disclosure, full-duplex operation is needed to overcome several challenges in order to work in a practical deployment. When using overlapping frequency resources, the received signal is subject to co-channel CLI and self-interference (SI). CLI and self-interference cancellation (SIC) methods include passive methods that rely on isolation between the transmit and receive antennas, active methods that utilize RF or digital signal processing, and hybrid methods that use a combination of passive and active methods. Filtering and interference cancellation can be implemented in RF, baseband (BB), or both RF and BB. While mitigating co-channel CLI may require greater complexity at the receiver, this is feasible within current technology limitations. Another aspect of FD operation is the mitigation of adjacent-channel CLI, as in several cellular band allocations, different operators have adjacent spectra.

[0144] Throughout this disclosure, the term "full-duplex" (FD) is used as a shorthand form for full-duplex operation in a wireless system. The terms "cross-divide duplex" (XDD), "full-duplex" (FD), and "sub-band full-duplex" may be used interchangeably in this disclosure.

[0145] Full-duplex operation in NR can improve the spectral efficiency, link robustness, capacity, and latency of UL transmissions. In an NR TDD system, transmissions from a UE may be limited by fewer available transmission opportunities than the UE's reception. For example, for NR TDD with SCS = 30 kHz, DDDU (2 milliseconds), DDDSU (2.5 milliseconds), or DDDDDDDSUU (5 milliseconds), the UL-DL configuration allows a DL:UL ratio from 3:1 to 4:1. Any transmission from the UE can only occur in a limited number of UL time slots, e.g., every 2, 2.5, or 5 milliseconds respectively.

[0146] Figure 11 FIG. 1100 shows an example UL-DL frame configuration in a full-duplex communication system according to various embodiments of the present disclosure. Figure 11 The embodiments of the example UL-DL frame configuration 1100 shown in the full-duplex communication system are for illustrative purposes only. Figure 11 The scope of the present disclosure will not be limited to any particular implementation of the example UL-DL frame configuration 1100 in the full-duplex communication system.

[0147] Figure 11 FIGS. show two example full-duplex configurations using single-carrier and carrier-aggregation UL-DL frame configurations according to embodiments of the present disclosure.

[0148] For a full-duplex-enabled single-carrier TDD configuration, the time slot denoted as X is a full-duplex or XDD time slot. DL and UL transmissions can both be scheduled in the FD or XDD time slot for at least one or more symbols. The terms FD or XDD time slot are used to refer to the following time slots: where if the base station schedules or assigns radio resources, the UE can simultaneously receive and transmit in at least one or more symbols of the time slot. A half-duplex UE cannot simultaneously transmit and receive in the FD or XDD time slot or on the symbols of the FD time slot. When a half-duplex UE is configured to transmit in the symbols of the FD or XDD time slot, another UE can be configured to receive in the symbols of the FD or XDD time slot. A full-duplex UE can simultaneously transmit and receive in the symbols of the FD or XDD time slot, which may be the case when there are other UEs scheduling or assigning resources for DL or UL in the symbols of the FD or XDD time slot. The transmission of the UE in the first FD or XDD time slot can use the same or different frequency-domain resources as in the second FD or XDD time slot, where these resources can be different in terms of bandwidth, position of the first RB, or center carrier.

[0149] For a carrier aggregation TDD configuration enabling full duplex, the UE receives in a time slot on CC#1 and transmits in at least one or more symbols of that time slot on CC#2. Except for D slots that are only for gNB / UE transmit / receive, U slots that are only for gNB / UE receive / transmit, and S slots that are also used to support DL-UL switching, FD or XDD time slots with gNB or UE transmit / receive on the same time domain resource (e.g., time slot or symbol) are marked by X. For an example of TDD with SCS = 30 kHz, single carrier, and UL-DL allocation DXXSU (2.5 msec), the second and third time slots allow FD operation. UL transmission can also occur in the last time slot (U) where the entire UL transmission bandwidth is available. The FD or XDD time slot or symbol assignment over a period of time and / or a certain number of time slots can be indicated by DCI format in PDCCH reception and then can vary per time period unit, or can be indicated by higher layer signaling, e.g., via MAC CE or RRC.

[0150] Various embodiments of the present disclosure recognize several issues when considering UL transmission and / or DL reception in a wireless communication system with full duplex capabilities. For example, the present disclosure recognizes that in an NR TDD network supporting full duplex or SBFD operation, the DL and / or UL channel or signal configuration, as well as the indication of the DL and / or UL transmission direction by the gNB and the determination of the DL and / or UL transmission direction by the UE, become more challenging due to the need for cross-link interference (CLI) management and self-interference cancellation (SIC) at the gNB during system operation.

[0151] The present disclosure further recognizes that, for example, in an NR TDD network supporting full duplex or XDD operation, the gNB may require a guard band between the SBFD DL subband and the SBFD UL subband to avoid unwanted inter-subband CLI and DL-UL self-interference levels in the gNB-side SIC implementation. For example, the gNB using time domain digital SIC may result in a different number of guard RBs compared to when the gNB uses frequency domain analog or digital SIC.

[0152] The present disclosure also recognizes that, for example, when the guard band is fixed or of the same size, e.g., the number of RBs in the guard band is fixed by a function of the system operation specification according to the RF band combination associated with a given SBFD DL and / or UL sub-band configuration, the final cell and UE throughput in SBFD deployment may be reduced. This is because the radio resources corresponding to the guard band may be reserved and cannot be scheduled by the gNB. Additionally, even if adjacent cells on the NR channel do not schedule the SBFD UL sub-band in the SBFD time slot or symbol, the guard band will still exist. Therefore, there will be unschedulable RBs that reduce the cell and / or UE throughput even if the guard band is not required due to CLI management in the SBFD time slot / symbol.

[0153] The present disclosure recognizes that the gNB can implicitly create a guard band through its DL and / or UL scheduling decisions. The gNB can schedule or configure DL or UL signals / channels and create a guard band without allocating the expected number of RBs between the SBFD UL sub-band and the SBFD DL sub-band. The UE follows the gNB DL / UL scheduling decisions, e.g., indicated by DCI format or higher layer information. Therefore, the UE is not aware of the existence of the guard band. When the gNB does not provide the UE with an explicit guard band configuration, the gNB implementation can benefit from increased scheduling flexibility. For example, in serving cells with a small guard band size or no guard band, when operating with a large spatial isolation between co-scheduled UEs, the gNB can schedule UL and / or DL signals / channels to / from the UE in the SBFD time slot or symbol. When there may be only a small spatial isolation between co-scheduled UEs in the SBFD time slot or symbol, the gNB can use a large guard band size. The gNB can use different numbers of RBs (including no RBs at all) in different full-duplex time domain resources (i.e., time slots or symbols). However, UEs operating in TDD serving cells that provide SBFD enhancements to improve full-duplex operation on the gNB side and are not aware of the existence or size of the guard band cannot implement advanced Rx-side or Tx-side processing (e.g., baseband (BB) filtering) to improve and control or adjust reception and transmission in terms of EVM, ACLR, SEM, or in-band emissions within the allocated bandwidth. Therefore, compared to SBFD-aware UEs that know the existence and size of the guard band and implement Rx-side or Tx-side filtering, the DL and / or UL link budget achievable by the UE may be reduced. The reason is that advanced Rx-side filtering can increase the level of in-band interference suppression between SBFD sub-bands during DL reception, and Tx-side filtering can reduce the in-band blocking between SBFD sub-bands of co-scheduled UEs in the SBFD time slot / symbol.

[0154] The present disclosure also recognizes that when the UE knows the number and frequency-domain positions of the RBs or SCs used as the guard bands between the SBFD UL and DL subbands, then the UE implementation can benefit from additional UE Rx and Tx side BB filtering of the allocated BW for the DL or UL signals or channels in the SBFD DL and UL subbands, respectively. For example, in an SBFD time slot or symbol with a configured or indicated SBFD UL subband, the UE operating bandwidth can be reduced to the size of the SBFD UL subband instead of the UE active UL BWP in a normal UL time slot / symbol. As a result, several UE modem functional blocks (e.g., D / A converters and BBs) may use lower voltages and / or lower clock rates due to fewer data samples to process. This benefits the UE Tx PA mechanism and reduces UE power consumption. When adjusting the BB filtering of the Tx-side waveform in the allocated BW of PUSCH, PUCCH, SRS, or random access preamble transmissions, the UE implementation can also utilize the UE's knowledge of the presence or size or frequency-domain position of the guard band. This is because the guard band RBs can be considered as redundant bandwidth and then the UL spectral products can be absorbed through frequency-domain waveform shaping in the filtering solution. However, in terms of the resulting signaling overhead, explicitly configuring or indicating multiple guard band RBs or SCs to the UE may be prohibitive. For example, flexibility during SBFD system operation may be required to configure or indicate the guard bands at symbol-level granularity on SBFD symbols and dynamically adjust during full-duplex system operation.

[0155] The present disclosure further recognizes that it is generally necessary to consider the guard bands in combination with the SBFD DL and / or UL subbands in the NR carrier BW. In one approach, when the frequency-domain occupancy of the SBFD UL subband is explicitly configured for the UE, the UE can use the knowledge of the DL and / or UL NR carrier BW parameters and the configured or indicated SBFD UL subband size and frequency-domain occupancy to determine the remaining RBs of the NR carrier BW in the SBFD time slot or symbol as the DL subband. The disadvantage of this approach is that the UE cannot know whether the gNB uses the guard band when scheduling or assigning UL transmissions and / or DL receptions. One reason is that the UE cannot implement advanced Tx or Rx side filtering solutions for UL transmissions or DL receptions on the SBFD UL or DL subbands. Another disadvantage is that the UE may assume that all the remaining RBs in the NR carrier bandwidth relative to the active DL BWP belong to the SBFD DL subband after removing the RBs configured or indicated as the SBFD UL subband on the SBFD symbol or time slot. This is undesirable because the gNB may need to control and adjust the assignment of the UE's SBFD DL subband relative to the UE BWP and / or relative to the frequency position of the NR carrier BW, e.g., the number of RBs or the starting RB, individually or independently.

[0156] Thus, as described in various embodiments of the present disclosure, during SBFD operation, it is necessary to control or adjust the number of guard bands RBs or SCs and the frequency-domain occupancy of the guard bands. Additionally, as also described in the present disclosure, during SBFD operation, it is necessary to control or adjust the SBFD DL sub-band allocation on symbols / slots. As described in the embodiments of the present disclosure, when configuring or indicating SBFD sub-bands of different sub-band types (such as UL sub-bands, DL sub-bands, or guard bands) to a UE, efficient signaling support is additionally required to reduce the DL signaling overhead in a TDD cell supporting full-duplex operation.

[0157] In another example, when using SBFD sub-bands to schedule or assign transmissions and receptions, it is desirable that introducing SBFD operation in a TDD cell does not result in a hard UL-DL resource split in the TDD cell. A hard UL-DL resource split occurs when the DL reception of a UE can only occur within an SBFD DL sub-band, or when the UL transmission from the UE can only occur within an SBFD-UL sub-band. The DL peak and cell aggregate throughput, as well as the DL spectral efficiency (SE), are reduced because the UL radio resources are not schedulable or assignable for the DL reception of the UE. It can be expected that the frequency-domain occupancy of the gNB configuration of the SBFD UL sub-band in the gNB channel BW is first selected according to deployment requirements. For example, the SBFD UL sub-band configuration can depend on the operator frequency band segment in the NR band. The frequency-domain position and size of the SBFD UL sub-band can depend on the gNB-side SBFD SIC implementation and capabilities. For example, for wide-area (WA) or mid-range (MR) base station class implementations, it can be expected that the gNB-side SIC implementation and capabilities can limit the possibility of scheduling or assigning UL transmissions from the UE outside the configured SBFD UL sub-band due to the need for analog and / or digital filtering. However, the gNB scheduler can be able to use the SBFD UL sub-band for DL transmissions from the gNB to schedule or assign the DL reception of the UE because SIC is not required when a symbol or slot is used for only DL reception of the UE.

[0158] Therefore, to avoid reducing the cell or UE throughput and spectral efficiency in a TDD serving cell supporting SBFD operation due to semi-static UL-DL resource splitting, it is desirable that SBFD time slots or symbols can be used to schedule or assign the DL reception of the UE. The UE-side advanced Tx-side and / or Rx-side filtering can depend on several factors, such as the frequency-domain position and size of the SBFD sub-band on a symbol or slot, or the UE DL BWP and UL BWP. The reconfiguration and switching time of the filter must be taken into account. The ability of the gNB scheduler to schedule or assign the SBFD UL sub-band for the DL reception of the UE can depend on the inter-cell sub-band CLI level.

[0159] Thus, as described in embodiments of the present disclosure, it is necessary to control or adjust the DL and / or UL transmission directions of the SBFD subbands in a TDD cell that supports full-duplex operation, while allowing for a reduction in UE modem implementation complexity.

[0160] The present disclosure solves the above problems and provides additional aspects for supporting UE transmission and reception in a cell that supports SBFD operation, and provides the solutions as described below. The present disclosure contemplates methods and solutions for a UE to determine an SBFD guard band based on an SBFD UL subband and an SBFD DL subband, methods and solutions for a UE to determine an SBFD DL subband based on an SBFD guard band and an SBFD UL subband, and methods and solutions for a UE to determine an SBFD subband based on a reference symbol / timeslot and / or a reference UE BWP.

[0161] Embodiments of the present disclosure are summarized below and are further elaborated in detail hereinafter. Combinations of embodiments are also applicable but are not described in detail for the sake of brevity. In an embodiment, for the same / separate symbol case, an SBFD guard band can be determined based on an SBFD DL and UL subband. In an embodiment, for the same / separate symbol case, an SBFD DL subband can be determined based on an SBFD UL subband and a guard band. In more embodiments, a frequency domain limit value can be used to determine the start and / or end of an SBFD subband relative to an NR carrier BW. In some embodiments, a frequency domain adjustment value of the minimum / maximum / default size of an SBFD subband can be used. In other embodiments, a UE or gNB can use a reference BWP to determine an SBFD subband on a symbol. In an embodiment, the present disclosure provides a hard / soft configuration for an SBFD UL subband. In still more embodiments, the present disclosure provides an SBFD subband configuration in RRC_IDLE / INACTIVE as a subset of the SBFD subband configuration in RRC_CONNECTED.

[0162] In one embodiment, information on the SBFD DL sub-band configuration in an SBFD time slot or symbol is provided to a UE (e.g., 111, 112, 113, etc.). For example, a gNB (e.g., 101, 102, 103, etc.) may use high-layer signaling to indicate or assign the SBFD DL sub-band configuration of one or two SBFD DL sub-bands on a symbol or time slot to the UE. Information on the SBFD UL sub-band configuration in the SBFD time slot or symbol is provided to the UE. For example, a gNB may use high-layer signaling to indicate or assign the SBFD UL sub-band configuration to the UE. The UE determines the frequency-domain position and size of the SBFD guard band in the SBFD time slot or symbol based on the information provided to the UE for the NR carrier BW and / or based on the UE bandwidth part (BWP) configuration as the RBs that are not explicitly configured, indicated, or assigned as SBFD DL and / or UL sub-bands in the SBFD time slot or symbol.

[0163] For example, information on the SBFD UL sub-band configuration in one or more SBFD symbols is provided to the UE through high-layer signaling. For example, the frequency-domain position and size or frequency-domain occupancy of the SBFD UL sub-band can be provided to the UE by indicating or assigning the starting RB and the allocated bandwidth or based on the resource indicator value (RIV) or the number of RBs or a bitmap. Information on the SBFD UL sub-band configuration for the common resource block (CRB) grid can be provided to the UE. Information on the SBFD UL sub-band configuration for the UE BWP configuration can be provided to the UE, e.g., excluding the resource blocks (RBs) in the NR carrier BW that are not within the configured or active UE BWP. The SBFD UL sub-band configuration can be provided based on a reference RB and / or based on a reference SCS. Information on the SBFD DL sub-band configuration in the SBFD time slot or symbol is provided to the UE through high-layer signaling. For example, the frequency-domain position and size or frequency-domain occupancy of the SBFD DL sub-band can be provided to the UE by separately indicating or assigning the starting RB and the allocated bandwidth or the RIV value or the number of RBs or a bitmap from the configuration of the SBFD UL sub-band provided to the UE. Information on the SBFD DL sub-band configuration for the CRB grid or for the UE BWP configuration can be provided to the UE. The SBFD DL sub-band configuration can be provided based on the indicated reference RB and / or based on a reference SCS. There may be multiple SBFD DL sub-band configurations in an SBFD symbol or time slot. If multiple SBFD DL sub-band configurations are provided for an SBFD symbol or time slot, the SBFD DL sub-bands can be discontinuous. For example, two SBFD DL sub-band configurations can be provided to the UE through high-layer signaling for one SBFD symbol. The same SBFD DL sub-band configuration or the same SBFD-UL sub-band configuration can be provided for multiple symbols or time slots, or different symbols or time slots can be separately indicated or assigned separate SBFD DL sub-bands and / or SBFD-UL sub-band configurations.

[0164] The UE determines the SBFD guard band by assuming the following using the provided SBFD UL sub-band and DL sub-band configurations: The RBs that are not part of the SBFD UL sub-band configuration provided on the reference bandwidth by higher layer signaling and are not part of the SBFD DL sub-band configuration are SBFD guard band RBs or SCs. For example, the reference bandwidth can correspond to the NR DL or UL carrier bandwidth, or the reference bandwidth can correspond to the configured or active UE DL BWP or UE UL BWP on a TDD cell. When the UE is scheduled or assigned to perform DL reception or UL transmission in the SBFD guard band, the UE can assume that DL reception from the gNB or UL transmission to the gNB cannot occur in the RBs corresponding to the SBFD guard band.

[0165] Figure 12 An example of guard band determination 1200 based on SBFD UL and DL sub-bands in a full-duplex communication system according to an embodiment of the present disclosure is shown. Figure 12 The embodiment of guard band determination 1200 in the full-duplex communication system shown is for illustration only and can be implemented, for example, by a wireless network 100 having one or more gNBs (e.g., 101, 102, 103, etc.) and one or more UEs (e.g., 111, 112, 113, etc.). Figure 12 It is not intended to limit the scope of the present disclosure to any particular implementation of guard band determination 1200 in a full-duplex communication system.

[0166] Figure 12 An example SBFD configuration in a full-duplex communication system is shown. Full-duplex operation is configured for NR band n78 using SCS = 30 kHz. Here, the NR DL carrier BW is N = 273 RBs, numbered from 0 to 272. A UE DL BWP of size K = 200 RBs is configured for the UE, which corresponds to RBs 0 to 199 of the NR DL carrier BW. The SBFD UL sub-band configuration on RBs M START = 100 to M END = 150 is indicated to the UE by higher layer signaling. Two SBFD DL sub-bands are indicated to the UE by higher layer signaling. With respect to the NR DL carrier BW (e.g., the CRB grid), SBFD DL sub-band #2 is located on RBs L 2_START = 10 to L 2_END = 95, and SBFD DL sub-band #1 is located on RBs L 1_START = 155 to L 1_END = 272. Based on the NR DL carrier BW and the SBFD sub-band configuration, the UE determines that the SBFD guard band includes from L 2_END +1 = 96 to MSTART -1 = RB of 99 and from M END +1 = 151 to L 1_START -1 = RB of 154. The UE may assume that no DL reception or UL transmission of the RBs using the SBFD protected bands has occurred. Using the configured or active UE DL BWP of size K = 200 RBs, the UE determines that the SBFD protected bands are composed of the DL BWP. The UE determines that DL reception using SBFD DL sub - band #2 can occur in SBFD DL sub - band #2 because it is fully included in the UE's active DL BWP. The UE determines that DL reception using SBFD DL sub - band #1 can occur in RBs 155 to 199 of SBFD DL sub - band #1 because RBs 200 to 272 are not included in the UE's active DL BWP.

[0167] Reference Figure 13 , shows an example UE processing flow chart for protected band determination based on SBFD DL and UL sub - band configurations. The UE processing flow chart 1300 can be implemented by, for example, the UE 111, 112, or 113, etc. in a wireless network system (e.g., 100) to facilitate protected band determination.

[0168] In an embodiment, an SBFD DL subband configuration (1310) for an SBFD symbol or time slot is provided to a UE. For example, one or two SBFD DL subband configurations may be provided to the UE, e.g., for an SBFD configuration of type "DU" or "UD" respectively or for an SBFD configuration of type "DUD". An SBFD UL subband configuration for an SBFD symbol or time slot is provided to the UE, (1320). For example, the SBFD DL and UL subband configurations, 1310 and 1320, may be indicated by referring to the PRB numbers of the CRB grid or by using equivalent reference RB numbers. Based on the SBFD DL and UL subband configurations, the UE determines the frequency domain occupancy (e.g., a set of RBs) of the SBFD guard band with respect to the reference RB numbers (1330). For example, the UE may determine the frequency domain occupancy of one or two SBFD guard bands, e.g., the positions and groups of the RBs. With respect to the configured or active UE BWP, the UE may determine that only a part of the SBFD DL subband or SBFD UL subband or SBFD guard band is applicable for DL reception and / or UL transmission. For example, the UE may determine that the SBFD guard band is partially or completely outside the configured or active UE BWP and that some or all of the RBs of the SBFD guard band are not applicable to its transmission and / or reception settings. Based on the frequency domain occupancy of the SBFD subband and / or guard band, the UE adjusts its modem settings for transmission and / or reception (1340). For example, the UE may load Rx and / or Tx filter parameters into memory and / or apply them for further reception and / or transmission based on the SBFD subband. For example, even if scheduled or assigned by DCI or higher layer signaling, the UE may configure many RBs or a set of RBs as not allowed for DL reception and / or not allowed for UL transmission. The UE applies the adjusted modem settings and, if scheduled or assigned for DL reception and / or UL transmission, uses the adjusted modem settings for reception and / or transmission (1350).

[0169] In an embodiment of the present disclosure, one motivation is to reduce the signaling overhead for SBFD configuration and subband assignment. When the frequency domain occupancy of the SBFD DL subband and SBFD UL subband is provided to the UE for an SBFD symbol / time slot, then the frequency domain occupancy of the SBFD guard band can be determined by the UE. The frequency domain occupancy (e.g., size and / or position) of the SBFD DL and UL subbands may be separately controlled by the gNB within the NR carrier BW. The UE is notified of the presence and frequency domain occupancy of the SBFD guard band. The UE may benefit from using advanced Tx-side or Rx-side filtering during transmission and reception using the SBFD subbands in a TDD cell that supports full-duplex operation, which can increase the radio range and link robustness.

[0170] In an embodiment, when the UE determines the frequency-domain occupancy of the SBFD guard band based on the SBFD DL sub-band configuration and based on the SBFD UL sub-band configuration, the SBFD DL and UL sub-band configurations can be provided for the same set or separate sets of symbols / slots, respectively.

[0171] For example, both the SBFD DL sub-band configuration and the SBFD UL sub-band configuration can be provided for the same set of symbols / slots. The UE determines the SBFD guard band for the same set of symbols / slots provided by the SBFD sub-band configuration. When the same frequency-domain occupancy is applied to the SBFD DL sub-band and the SBFD UL sub-band on the symbols in a set of symbols / slots, the UE then determines the same frequency-domain occupancy for the SBFD guard band on that symbol.

[0172] For example, the SBFD DL sub-band configuration and the SBFD UL sub-band configuration can be provided for different sets of symbols / slots, where the different sets can partially overlap or not overlap. The SBFD DL sub-band configuration is provided to the UE for a first set of symbols / slots. The SBFD UL sub-band configuration is provided to the UE for a second set of symbols / slots. The UE determines the SBFD guard band for a third set of symbols / slots. When the symbols from the third set of symbols / slots are included in the first set of symbols / slots and the second set of symbols / slots, the UE determines the frequency-domain occupancy of the SBFD guard band for the symbols from the third set based on the SBFD DL sub-band configuration and based on the SBFD UL sub-band configuration.

[0173] For example, an SBFD DL sub-band configuration and an SBFD UL sub-band configuration can be provided for the same group or different groups of symbols / slots, where different groups can partially overlap or not overlap. The UE determines the SBFD guard band on the symbols based on one or more reference symbols or slots using the SBFD DL sub-band configuration and / or the SBFD UL sub-band configuration. The SBFD DL sub-band configuration is provided to the UE for a first group of symbols / slots. The SBFD UL sub-band configuration is provided to the UE for a second group of symbols / slots. The UE determines the SBFD guard band for a third group of symbols / slots. The UE determines the frequency domain occupancy of the SBFD guard band for the symbols from the third group of symbols / slots with reference to the symbols or slots in the first group of symbols / slots provided for the SBFD DL sub-band configuration based on a first reference symbol or slot and / or with reference to the symbols / slots or slots in the second group of symbols / slots provided for the SBFD UL sub-band configuration based on a second reference symbol. The first reference symbol / slot and the second reference symbol / slot can be the same or different. The first reference symbol / slot and / or the second reference symbol / slot can be configured and / or indicated to the UE based on DCI signaling, MAC-CE signaling, or via RRC signaling, or correspond to a fixed value or be tabulated and provided by the system operation specification. Only one of the first reference symbol / slot or the second reference symbol / slot can be configured and / or indicated to the UE, while the other reference symbol / slot can be a fixed value or a tabular value. Only one reference symbol / slot can be provided to the UE to determine the frequency domain occupancy of the SBFD guard band for the symbols from the third group of symbols / slots. For example, the UE can determine the SBFD guard band for the symbols from the third group of symbols / slots based on the SBFD UL sub-band configuration on the same symbols in the second group of symbols / slots but using the SBFD DL sub-band configuration on the reference symbol / slot from the first group of slots / symbols. The same principle can be applied when the reference symbol / slot from the second group of slots / symbols is used for the SBFD UL sub-band and the SBFD guard band on the symbols is determined by the UE based on the SBFD DL sub-band configuration of the same symbol.

[0174] For example, a relative symbol or slot offset value of the reference symbol / slot with respect to the SBFD DL sub-band configuration or with respect to the SBFD UL sub-band configuration can be indicated. The UE can determine the frequency occupancy of the SBFD guard band in symbol or slot k based on the SBFD DL and / or UL sub-band configuration provided for an earlier symbol or slot k - k ref (where k ref > 0), with the additional condition that k ref is equal to or greater than a minimum value (such as k ref,min = 4) to provide a minimum application or processing delay to the UE.

[0175] For illustrative purposes, an example SBFD configuration in a full-duplex communication system is considered. Full-duplex operation is configured for NR band n78 using SCS = 30 kHz. Here, the NR DL carrier BW is N = 273 RBs, numbered from 0 to 272. A UE DL BWP of size K = 200 RBs is configured for the UE, which corresponds to RBs 0 to 199 of the NR DL carrier BW. The RB M START = 100 to M END = 150 for the SBFD UL subband allocation on the SBFD symbols is indicated to the UE by higher layer signaling. Two SBFD DL subbands are indicated to the UE by higher layer signaling. With respect to the NR DL carrier BW (e.g., the CRB grid), SBFD DL subband #2 is located at RB L 2_START = 10 to L 2_END = 95, and SBFD DL subband #1 is located at RB L 1_START = 155 to L 1_END = 272. The indicated SBFD DL subband configuration and SBFD UL subband configuration are the same on all symbols in the time slots of the second and third time slots of the DXXSU UL-DL frame configuration, where "X" represents the time slots supporting full-duplex operation in a TDD cell. In some embodiments, without limiting the scope of the principles of this example, it can be assumed that the first time slot operates in DL-only mode, the last time slot operates in UL-only mode, and the fourth time slot "S" operates in DL-only mode for the first plurality of symbols for the DL portion and / or in UL-only mode for the second plurality of symbols for the UL portion. A reference symbol / slot regarding the SBFD DL subband configuration is provided to the UE to determine the SBFD guard band on the time slot / symbol. For example, the last symbol of the last full-duplex time slot in the previous UL-DL frame period n configured with the SBFD DL subband is the reference symbol / slot for SBFD guard band determination in the subsequent UL-DL frame period. Based on the NR DL carrier BW and the SBFD UL subband configuration on the symbol, the UE determines that the SBFD guard band on the same symbol in UL-DL frame period n + 1 includes RBs from L 2_END + 1 = 96 to M START - 1 = 99 and from M END + 1 = 151 to L 1_START - 1 = 154. Using the configured or active DL BWP of size K = 200 RBs, the UE determines that the SBFD guard band is within the DL BWP. The reconfiguration of the SBFD DL subband configuration is provided to the UE by higher layer in the PDSCH received in UL-DL frame period n or earlier. The modified SBFD DL subband configuration reduces the size of SBFD DL subband #1 to from L 1_START= 158 to L 1_END The frequency domain occupancy indicated on the RB of = 222. Considering the sufficient activation delay of the new SBFD subband configuration, the new SBFD DL subband configuration #1 is applied starting from the first applicable time slot in the UL-DL frame period n+2. Based on the NR DL carrier BW and the SBFD UL subband configuration on the symbols, the UE determines that the SBFD guard band in the UL-DL frame period n+2 includes from L 2_END +1 = 96 to M START -1 = 99 of the RBs and from M END +1 = 151 to L 1_START -1 = 154 of the RBs, and then based on the reference symbols / time slots from the UL-DL frame period n+2, determines that the SBFD guard band in the UL-DL frame period n+3 includes from L 2_END +1 = 96 to M START -1 = 99 of the RBs and from M END +1 = 151 to L 1_START -1 = 157 of the RBs.

[0176] In various embodiments, a similar principle can be applied in the following cases: (a) referring to the symbols / time slots used for the SBFD UL subband configuration to provide, indicate, or define the reference symbols / time slots for determining the SBFD guard band on the time slots / symbols; (b) when a first reference symbol / time slot is provided, indicated, or defined with respect to the SBFD DL subband configuration and a second reference symbol / time slot is provided, indicated, or defined with respect to the SBFD UL subband configuration, where the first reference symbol / time slot and / or the second reference symbol / time slot can be the same or can be different.

[0177] The benefit of using the provided, indicated, or defined absolute or relative reference symbols / time slots to determine the SBFD guard band of another symbol or time slot is that the UE modem design can take into account sufficient application and processing delays, for example, the delays when loading or changing filter coefficients or when applying updated BB or RF modem configurations. Another benefit is that the UE determining the SBFD guard band on the symbols does not require providing both the SBFD DL and UL subbands on the same symbol. The SBFD UL subband configuration can be provided for a set of symbols / time slots different from the SBFD DL subband configuration, which increases the flexibility of the gNB side in allocating DL reception and / or UL transmission to UEs using full-duplex time slots.

[0178] In a further embodiment of the present disclosure, information on the SBFD guard band configuration in the SBFD time slot or symbol is provided to the UE. For example, the gNB may use higher layer signaling to indicate or assign the SBFD guard band configuration of one or two SBFD guard bands on the symbol or time slot to the UE. Information on the SBFD UL sub-band configuration in the SBFD time slot or symbol is provided to the UE. For example, the gNB may use higher layer signaling to indicate or assign the SBFD UL sub-band configuration to the UE. The UE determines the frequency domain position and size of the SBFD DL sub-band in the SBFD time slot or symbol based on the information provided to the UE for the NR carrier BW and / or based on the UE bandwidth part (BWP) configuration as the RBs that are not explicitly configured, indicated, or assigned as SBFD guard bands and / or UL sub-bands in the SBFD time slot or symbol.

[0179] For example, information on the SBFD UL sub-band configuration in one or more SBFD symbols or time slots is provided to the UE through higher layer signaling. For example, the frequency domain position and size or frequency domain occupancy of the SBFD UL sub-band may be provided to the UE by indicating or assigning the starting RB and the allocated bandwidth or based on the RIV value or the number of RBs or the bitmap. Information on the SBFD UL sub-band configuration with respect to the CRB grid may be provided to the UE. Information on the SBFD UL sub-band configuration with respect to the UE BWP configuration may be provided to the UE, for example, excluding the RBs in the NR carrier BW that are not within the configured or active UE BWP. The SBFD UL sub-band configuration may be provided based on a reference RB and / or based on a reference SCS. Information on the SBFD guard band configuration in the SBFD symbol or time slot is provided to the UE through higher layer signaling. For example, the frequency domain position and size or frequency domain occupancy of the SBFD guard band may be provided to the UE by indicating or assigning the starting RB and the allocated bandwidth or the RIV value or the number of RBs or the bitmap separately from the configuration of the SBFD UL sub-band provided to the UE. Information on the SBFD guard band configuration with respect to the CRB grid or with respect to the UE BWP configuration may be provided to the UE. The SBFD guard band configuration may be provided based on the indicated reference RB and / or based on a reference SCS. There may be multiple SBFD guard band configurations in the SBFD symbol or time slot. If multiple SBFD guard band configurations are provided for the SBFD symbol or time slot, the SBFD guard bands may be discontinuous. For example, two SBFD guard band configurations may be provided to the UE through higher layer signaling for one SBFD symbol. The same SBFD guard band configuration or the same SBFD-UL sub-band configuration may be provided for multiple symbols or time slots, or different symbols or time slots may be separately indicated or assigned separate SBFD guard bands and / or SBFD-UL sub-band configurations.

[0180] The UE determines the SBFD DL subbands by assuming the following using the provided SBFD UL subband and guard band configurations: The RBs that are not part of the SBFD UL subband configuration provided on the reference bandwidth by higher layer signaling and that are not part of the SBFD guard band configuration are SBFD DL subband RBs. For example, the reference bandwidth can correspond to the NR DL or UL carrier bandwidth, or the reference bandwidth can correspond to the configured or active DL BWP or UL BWP for the UE on a TDD cell. The UE can assume that DL reception from the gNB or UL transmission to the gNB cannot occur in the RBs or SCs corresponding to the SBFD guard bands.

[0181] Figure 14 An example of SBFD DL subband determination 1400 based on SBFD UL subbands and SBFD guard bands in a full-duplex communication system according to an embodiment of the present disclosure is shown. Figure 14 The embodiment of SBFD DL subband determination 1400 in the shown full-duplex communication system is for illustration only. Figure 14 The scope of the present disclosure will not be limited to any particular implementation of SBFD DL subband determination 1400 in a full-duplex communication system. In various embodiments, the SBFD DL subband determination can be implemented by the radio network system 100.

[0182] Figure 14 An example SBFD configuration in a full-duplex communication system is shown. Full-duplex operation is configured for NR band n78 with SCS = 30 kHz. Here, the NR DL carrier BW is N = 273 RBs, numbered from 0 to 272. A UE DL and UL BWP of size K = 200 RBs is configured for the UE, which corresponds to RBs 0 to 199 of the NR DL carrier BW. The SBFD UL subband configuration on RBs M START = 100 to M END = 150 is indicated to the UE by higher layer signaling. Two SBFD guard bands are indicated to the UE by higher layer signaling. With respect to the NR DL carrier BW (e.g., the CRB grid), SBFD guard band #2 is located on RBs L 2_START = 96 to L 2_END = 99, and SBFD guard band #1 is located on RBs L 1_START = 151 to L 1_END = 154. Based on the NR DL carrier BW and the SBFD UL subband configuration and based on the SBFD guard band configuration, the UE determines that the SBFD DL subbands include the RBs from N START = 0 to L 2_START - 1 = 95 and from L 1_END + 1 = 155 to NEND RB of 272. The UE may assume that no DL reception or UL transmission using the SBFD protection band has occurred. Using the configured or active UE DL BWP of size K = 200 RBs, the UE determines whether the SBFD DL subband is fully, partially, or not at all included in the reception bandwidth. In this example, the UE determines that DL reception can occur in SBFD DL subband #2 because SBFD DL subband #2 is fully included in the UE's active DL BWP. The UE determines that DL reception using SBFD DL subband #1 can occur in RBs 155 to 199 of SBFD DL subband #1 but not in RBs 200 to 272 because RBs 200 to 272 are not included in the UE's active DL BWP.

[0183] Figure 15 An example UE processing flow chart 1500 for SBFD DL subband determination based on SBFD UL subband configuration and SBFD protection band configuration is shown. Figure 15 The UE processing flow chart 1500 can be implemented in combination by any UE (such as UE 111, 112, or 113, etc.) of the wireless network system 100 and gNB 101, 102, or 103, etc.

[0184] Provide the UE with an SBFD guard band configuration for an SBFD symbol or time slot (1510). For example, one or two SBFD guard band configurations may be provided to the UE, for example, for an SBFD configuration of type "DU" or "UD" or for an SBFD configuration of type "DUD". The UE determines the NR carrier BW (1520). For example, the UE may determine the NR DL carrier BW based on SIB1. Provide the UE with an SBFD UL sub-band configuration for an SBFD symbol or time slot (1530). For example, the SBFD UL sub-band and guard band configurations (1510 and 1530) may be signaled with reference to the PRB number of the CRB grid or using an equivalent reference RB number. With respect to the reference RB number, the UE determines the frequency domain occupancy (e.g., a set of RBs) of the SBFD DL band based on the SBFD UL sub-band configuration and based on the SBFD guard band configuration (1540). For example, the UE may determine the frequency occupancy of one or two SBFD DL bands, e.g., the position and set of RBs. With respect to the configured or active UE BWP, the UE may determine that only a portion of the SBFD DL sub-band or SBFD UL sub-band is applicable for DL reception and / or UL transmission. For example, the UE may determine that a partial or entire SBFD DL sub-band is partially or completely outside the configured or active DL BWP, and some or all of the RBs of the SBFD DL sub-band are not applicable to its reception settings. Based on the frequency domain occupancy of the SBFD sub-band and / or guard band, the UE adjusts its modem settings for transmission and / or reception (1550). For example, the UE may load Rx and / or Tx filter parameters into memory and / or apply them to further reception and / or transmission on the SBFD sub-band. For example, even if scheduled or assigned or indicated by DCI or by higher layer signaling, the UE may configure many RBs or a set of RBs as not allowed for DL reception and / or not allowed for UL transmission. The UE applies the adjusted modem settings and, if scheduled or assigned or indicated for DL reception and / or UL transmission, the UE uses the adjusted modem settings for reception and / or transmission (1560).

[0185] In an embodiment of the present disclosure, one benefit is reduced signaling overhead for SBFD configuration and sub-band assignment. When the frequency-domain occupancy of the SBFD UL sub-band and the SBFD protection band is provided to the UE for SBFD symbols / slots, the UE can determine the frequency-domain occupancy of the SBFD DL sub-band. The frequency-domain occupancy of the SBFD UL sub-band and the SBFD protection band (e.g., size and / or location) can be separately controlled by the gNB within the NR carrier BW. The UE is notified of the presence and frequency-domain occupancy of the SBFD protection band. The UE can benefit from using advanced Tx-side or Rx-side filtering during transmission and reception using the SBFD sub-band in a TDD cell that supports full-duplex operation, which can increase the radio range and link robustness.

[0186] In some embodiments, when the UE determines the frequency-domain occupancy of the SBFD DL sub-band based on the SBFD protection band configuration and based on the SBFD UL sub-band configuration, the SBFD protection band and the SBFD UL sub-band configuration can be provided for the same set or separate sets of symbols / slots, respectively.

[0187] For example, the SBFD protection band configuration and the SBFD UL sub-band configuration can be provided for the same set of symbols / slots. The UE determines the SBFD DL sub-band configuration for the same set of symbols / slots provided by the SBFD protection band and the UL sub-band configuration. When the same frequency-domain occupancy is applied to the SBFD protection band and the SBFD UL sub-band on the symbols within a set of symbols / slots, the UE then determines the same frequency-domain occupancy for the SBFD DL sub-band on that symbol.

[0188] For example, the SBFD protection band configuration and the SBFD UL sub-band configuration can be provided for different sets of symbols / slots, where the different sets can partially overlap or not overlap. The SBFD protection band configuration is provided to the UE for a first set of symbols / slots. The SBFD UL sub-band configuration is provided to the UE for a second set of symbols / slots. The UE determines the SBFD DL sub-band for a third set of symbols / slots. When the symbols from the third set of symbols / slots are included in the first set of symbols / slots and the second set of symbols / slots, the UE determines the frequency-domain occupancy of the SBFD DL sub-band for that symbol from the third set based on the SBFD protection band configuration and based on the SBFD UL sub-band configuration.

[0189] For example, SBFD guard band configurations and SBFD UL sub-band configurations can be provided for the same set or different sets of symbols / slots, where different sets can partially overlap or not overlap. The UE determines the SBFD DL sub-band on the symbol using the SBFD guard band configuration and / or the SBFD UL sub-band configuration based on one or more reference symbols or slots. The SBFD guard band configuration is provided to the UE for a first set of symbols / slots. The SBFD UL sub-band configuration is provided to the UE for a second set of symbols / slots. The UE determines the SBFD DL sub-band for a third set of symbols / slots. The UE determines the frequency occupancy of the SBFD DL sub-band of the symbols from the third set of symbols / slots with reference to the symbols or slots in the first set of symbols / slots provided for the SBFD guard band configuration based on the first reference symbol or slot and / or the symbols / slots in the second set of symbols / slots provided for the SBFD UL sub-band configuration based on the second reference symbol or slot. The first reference symbol / slot and the second reference symbol / slot can be the same or different. The first reference symbol / slot and / or the second reference symbol / slot can be configured and / or indicated to the UE based on DCI signaling, MAC-CE signaling, or RRC signaling, or correspond to a fixed value or be tabulated and provided by the system operation specification. Only one of the first reference symbol / slot or the second reference symbol / slot can be configured and / or indicated to the UE, while the other reference symbol / slot can be a fixed value or a tabular value. Only one reference symbol / slot can be provided to the UE to determine the frequency occupancy of the SBFD DL sub-band of the symbols from the third set of symbols / slots. For example, the UE can determine the SBFD DL sub-band of the symbols from the third set of symbols / slots based on the SBFD UL sub-band configuration on the same symbols in the second set of symbols / slots and using the SBFD guard band configuration on the reference symbols / slots from the first set of slots / symbols. The same principle can be applied when the reference symbols / slots from the second set of slots / symbols are used for the SBFD UL sub-band and the SBFD DL sub-band on the symbol is determined by the UE based on the SBFD guard band configuration of the same symbol.

[0190] For example, the relative symbol or slot offset value of the reference symbol / slot with respect to the SBFD guard band configuration or the SBFD UL sub-band configuration can be configured. The UE can determine the frequency occupancy of the SBFD DL sub-band in symbol or slot k based on the SBFD guard band and / or the SBFD UL sub-band configuration provided for the earlier symbol or slot k-k ref (where k ref >0), with the additional condition that k ref is greater than or equal to a minimum value (such as k ref,min =4) to provide a minimum application or processing delay to the UE.

[0191] For illustrative purposes, an example SBFD configuration in a full-duplex communication system is considered. Full-duplex operation is configured for NR band n78 using SCS = 30 kHz. Here, the NR DL carrier BW is N = 273 RBs, numbered from 0 to 272. A UE DL BWP of size K = 200 RBs is configured for the UE, which corresponds to RBs 0 to 199 of the NR DL carrier BW. The RB M START = 100 to M END = 150 on the SBFD UL subband allocation is indicated to the UE by higher layer signaling. Two SBFD guard bands are indicated to the UE by higher layer signaling. With respect to the NR DL carrier BW (e.g., the CRB grid), SBFD guard band #2 is located at RB L 2_START = 96 to L 2_END = 99, and SBFD guard band #1 is located at RB L 1_START = 151 to L 1_END = 154. The indicated SBFD guard band configuration and SBFD UL subband configuration are the same on all symbols in the second and third time slots of the DXXSU UL-DL frame configuration, where "X" represents the time slots in the TDD cell that support full-duplex operation. It should be noted that without loss of generality, in this example, it is assumed that the first time slot operates in DL-only mode, the last time slot operates in UL-only mode, and the fourth time slot "S" operates in DL-only mode for the DL part and / or in UL-only mode for the UL part. The UE is provided with reference symbols / time slots for the SBFD DL subband configuration to determine the SBFD guard bands on the time slots / symbols. For example, the last symbol of the last full-duplex time slot in the previous UL-DL frame period n configured with SBFD guard bands is the reference symbol / time slot for the SBFD DL subband determination in the subsequent UL-DL frame period. Based on the NR DL carrier BW and the SBFD UL subband configuration on the symbols, the UE determines that the SBFD DL subband on the same symbol in UL-DL frame period n+1 includes RBs from N START = 0 to L 2_START -1 = 95 and from L 1_END +1 = 155 to N END = 272. Using the configured or active UE DL BWP of size K = 200 RBs, the UE determines that SBFD DL subband #2 is fully composed of the DL BWP and SBFD DL subband #1 is partially composed of the DL BWP. The reconfiguration of the SBFD guard band configuration is provided to the UE by higher layer in the PDSCH received in UL-DL frame period n or earlier. The modified SBFD guard band configuration increases the size of SBFD guard band #1 to from L1_START = 151 to L 1_END = 157 of the frequency domain occupancy indicated on RB. Considering the sufficient activation delay of the new SBFD protection band configuration, the new SBFD protection band configuration #1 is applied starting from the first applicable time slot in UL-DL frame period n+2. Based on the NR DL carrier BW and the SBFD UL sub-band configuration on symbols, the UE determines that the SBFD DL sub-band in UL-DL frame period n+2 includes from N START = 0 to L 2_START -1 = 95 of the RBs and from L 1_END +1 = 155 to N END = 272 of the RBs, but then determines that the SBFD protection band in UL-DL frame period n+3 includes from N START = 0 to L 2_START -1 = 95 of the RBs and from L 1_END +1 = 158 to N END = 272 of the RBs.

[0192] In more embodiments, a similar principle can be applied in the following cases: (a) referring to the symbols / time slots used for the SBFD UL sub-band configuration to provide, indicate, or define the reference symbols / time slots for determining the SBFD DL sub-band on time slots / symbols; or (b) when a first reference symbol / time slot is provided, indicated, or defined regarding the SBFD protection band configuration and a second reference symbol / time slot is provided, indicated, or defined regarding the SBFD UL sub-band configuration, where the first reference symbol / time slot and / or the second reference symbol / time slot can be the same or can be different.

[0193] The benefit of using the provided, indicated, or defined absolute or relative reference symbols / time slots to determine the SBFD DL sub-band of another symbol or time slot is that the UE modem design can take into account sufficient application and processing delays, for example, the delays when loading or changing filter coefficients or when applying updated BB or RF modem configurations. Another benefit is that the UE does not need to provide both the SBFD protection band and the SBFD UL sub-band on the same symbol to determine the SBFD DL sub-band on the symbol. The SBFD UL sub-band configuration can be provided for a set of symbols / time slots different from the SBFD DL sub-band configuration, which increases the flexibility on the gNB side for allocating DL reception and / or UL transmission to UEs using full-duplex time slots.

[0194] For example, when supporting symbol-level allocation granularity for SBFD DL sub-bands, SBFD UL sub-bands, or SBFD guard band configurations, the higher-layer signaling can support large signaling payloads when the UE operates in RRC_CONNECTED mode using UE-specific RRC signaling. The SBFD UL and SBFD DL sub-band configurations for the UE to determine the SBFD guard band configuration, or the SBFD guard band and SBFD UL sub-band configurations for the UE to determine the SBFD DL sub-band configuration, can be provided for each symbol or each symbol group. When determining the frequency-domain position or RB group of the SBFD guard band or SBFD DL sub-band on a symbol or symbol group, a reference symbol or reference symbol group configuration can be provided, indicated, configured, or assumed by the UE. For example, the UE can determine a time slot, a frame, or a suitably selected reference period #k 2 based on the SBFD UL sub-band configuration and / or SBFD DL sub-band configuration and / or SBFD guard band configuration provided for the symbol or symbol group #m in a reference period #k 1 and determine the frequency-domain position or RB group of the SBFD guard band or SBFD DL sub-band on the symbol or symbol group #n in a reference period #k

[0195] In another embodiment, a frequency-domain limit value is provided to the UE, which determines the start or end of the frequency occupancy of the SBFD DL sub-band or SBFD UL sub-band or SBFD guard band relative to a reference RB. The frequency-domain limit value can be provided to the UE explicitly, i.e., configured, indicated, assigned, or tabulated by the system operation specification of the UE. The frequency-domain limit value can be provided implicitly, i.e., determined by the UE based on another parameter such as the frequency occupancy of the UE BWP.

[0196] For example, a CRB grid can be selected for a reference RB number. The frequency-domain limit value determines the starting RB of the SBFD DL or SBFD UL sub-band or SBFD guard band configuration as the number of RBs that is a relative offset value relative to the reference RB value (e.g., CRB #0). The frequency-domain limit value determines the ending RB of the SBFD DL or SBFD UL sub-band or SBFD guard band configuration as the number of RBs that is a relative offset value relative to the reference RB value (e.g., the highest RB in the NR carrier BW).

[0197] For example, the configured or active UE BWP can be selected for a reference RB number. The frequency-domain limit value determines the starting RB of the SBFD DL or SBFD UL subband or SBFD guard band configuration as the number of RBs that is a relative offset value with respect to a reference RB value (e.g., the lowest RB of the UE BWP). The frequency-domain limit value determines the ending RB of the SBFD DL or SBFD UL subband or SBFD guard band configuration as the number of RBs that is a relative offset value with respect to the reference RB (e.g., the highest RB of the UE BWP).

[0198] For example, the relative start and / or relative end offset values (including the value 0 or a value greater than 0) of the offset value of the SBFD DL subband, SBFD UL subband, or SBFD guard band configuration with respect to a reference RB (e.g., CRB #0, or the lowest RB of the UE BWP, or the highest RB in the NR carrier BW, or the highest RB of the UE BWP) can be provided to, indicated to, configured for, defined for, or signaled to the UE as the frequency-domain limit value. The frequency-domain limit value can be provided to the UE by higher-layer signaling, or can be defined in the system specification, or can otherwise be known to the UE.

[0199] For example, consider Figure 14 the SBFD configuration in the full-duplex communication system shown. The full-duplex operation is configured for NR band n78 using SCS = 30 kHz. Here, the NR DL carrier BW is N = 273 RBs, numbered from 0 to 272. A UE DL and UL BWP of size K = 200 RBs is configured for the UE, which corresponds to RBs 0 to 199 of the NR DL carrier BW. The UE is signaled by higher-layer signaling the SBFD UL subband configuration on RBs M START = 100 to M END = 150. The UE is signaled by higher-layer signaling two SBFD guard bands. With respect to the NR DL carrier BW (e.g., the CRB grid), SBFD guard band #2 is located on RBs L 2_START = 96 to L 2_END = 99, and SBFD guard band #1 is located on RBs L 1_START = 151 to L 1_END = 154.

[0200] For example, the UE is provided with a frequency-domain limit value X LOW = 15 RBs. Based on the SBFD UL subband configuration and based on the SBFD guard band configuration, the UE determines that the possible SBFD DL subbands include from N START = 0 to L 2_START-1 = 95 RBs and possible SBFD DL subbands include from L 1_END +1 = 155 to N END = 272 RBs. Based on the frequency domain limit value X LOW , the UE determines that the actual SBFD DL subband #2 starts from RBN START = 15, for example, N START = X LOW , and ends at RB L 2_START -1 = 95. In this example, the UE determines that DL reception can occur in SBFD DL subband #2 because SBFD DL subband #2 is fully included in the UE's active DL BWP. The UE determines that DL reception using SBFD DL subband #1 can occur in RBs 155 to 199 of SBFD DL subband #1 because RBs 200 to 272 are not included in the UE's active DL BWP.

[0201] For example, the frequency domain limit value X HIGH = 190 RBs is provided to the UE. Based on the frequency domain limit value X HIGH , the UE determines that the actual SBFDDL subband #1 ends at RB N START = 190, for example, N END = X HIGH , and starts at RB L 1_END +1 = 155. In this example, the UE determines that DL reception can occur in SBFD DL subband #1 because SBFD DL subband #1 is fully within the UE's active DLBWP. The UE determines that DL reception using SBFD DL subband #1 can occur in RBs 155 to 189 of SBFD DL subband #1 because RBs 200 to 272 are not included in the UE's active DL BWP, and the actual last RB of SBFD DL subband #1 indicated by X HIGH is lower than the highest RB of the UE DL BWP.

[0202] When the frequency domain limit value for determining the start or end of the frequency domain occupancy of an SBFD DL subband or an SBFD UL subband or an SBFD guard band is provided as a relative offset value with respect to the lowest or highest RB of the UE BWP respectively, a similar principle as shown can be applied.

[0203] The lower frequency domain limit value X LOW and / or the higher frequency domain limit value X HIGHThe motivation is that for implicitly determined SBFD sub - band types, SBFD sub - band determination by the UE can avoid the need for the gNB to assign all RBs from the lowest RB up to the highest RB of the NR carrier BW or UL / DL BWP pair. For example, when an "DUD" type of SBFD configuration is required on a TDD cell supporting full - duplex operation, multiple RBs at the edges of the NR carrier can be used as guard RBs, which are independent of SBFD guard bands #1 and / or #2 that separate the SBFDDL and UL sub - bands respectively. One benefit is increased adjacent channel protection when in - band contiguous carrier aggregation is deployed. For example, when a "DU" or "UD" type of SBFD configuration is required on a TDD cell supporting full - duplex operation, multiple separate guard RBs can be configured at the edges of the UE BWP. For example, it is not necessary to determine all RBs that make up the UE BWP as SBFD UL sub - bands, SBFD DL sub - bands, or SBFD guard bands that separate the SBFD DL and UL sub - bands. One benefit is increased UE - to - UE CLI protection.

[0204] In one embodiment, a frequency - domain adjustment value is provided to the UE, which determines the minimum or maximum or default size of the frequency - domain occupancy of the SBFD DL sub - band or SBFD UL sub - band or SBFD guard band.

[0205] For example, the minimum or maximum or default size of the SBFD DL sub - band, SBFD UL sub - band, or SBFD guard band configuration can be provided, indicated, configured, defined, or signaled as the frequency - domain adjustment value. The frequency - domain adjustment value can be provided to the UE as information via higher - layer signaling, or defined in the system specification, or can be indicated or assigned to the UE based on DCI or MAC - CE signaling.

[0206] For example, consider Figure 12SBFD configuration in the full-duplex communication system shown. For example, when the UE determines the frequency-domain occupancy of the SBFD guard band based on the frequency-domain positions of the SBFD UL sub-band and the SBFD DL sub-band, the frequency-domain adjustment value can represent the minimum or maximum or default number of RBs (or SCs) determined by the UE for the number of RBs (or SCs) of the SBFD guard band. For example, the configurable frequency-domain adjustment value Z = 3 RBs provided to the UE can be associated with the minimum SBFD guard band size. For example, when the SBFD UL sub-band configuration on RBs 100 to 150 on the SBFD symbol and two SBFD DL sub-band configurations on RBs 10 to 98 for SBFD DL sub-band #2 and on RBs 155 to 272 for SBFD DL sub-band #1 are provided to the UE, the UE determines that the resulting SBFD guard band #2 on RB 99 is less than the frequency-domain adjustment value Z = 3 RBs, and the UE applies the minimum SBFD guard band size Z = 3 RBs and assumes that RBs 97 to 99 are the actual SBFD guard band #2. The UE determines that the SBFD guard band #1 obtained on RBs 151 to 154 is greater than the frequency-domain adjustment value Z = 3 RBs, and the UE applies the determined SBFD guard band size as the actual SBFD guard band and assumes that RBs 151 to 154 are used for the actual SBFD guard band #1. A similar method can be applied to the case where the SBFD guard band configuration is provided to the UE to determine the SBFD DL sub-band based on the SBFD UL sub-band.

[0207] In various embodiments, when a frequency-domain adjustment value that determines the minimum or maximum or default size of the frequency-domain occupancy of the SBFD DL sub-band or the SBFD UL sub-band is provided regarding the size of the UE BWP, a similar principle as shown in the example can be applied.

[0208] In one embodiment, information on a reference BWP is provided to a UE to determine the frequency-domain occupancy of an SBFD DL sub-band or an SBFD UL sub-band or an SBFD guard band in a receive or transmit bandwidth. The reference BWP may be provided to the UE, i.e., the reference BWP of the UE is configured or indicated or assigned to the UE or tabulated by the system operation specification of the UE. The reference BWP may be determined by the UE, i.e., the UE determines the active UE BWP of the serving cell as the reference BWP. The reference BWP of the UE may be selected by the UE from the DL BWP and the UL BWP on a symbol based on conditions such as a transmit direction. The reference BWP may correspond to an actual BWP, i.e., one of a set of configured DL BWPs in the DL bandwidth for UE reception or one of a set of configured UL BWPs in the UL bandwidth for UE transmission, or the reference BWP may correspond to a hypothetical or virtual BWP configuration, where parameters are provided to the UE or determined by the UE. For a secondary cell or a secondary cell group, the reference BWP for the UE to determine the frequency occupancy of an SBFD DL sub-band, an SBFD UL sub-band or an SBFD guard band on the serving cell may be provided to the UE or determined by the UE, e.g., when a TDD serving cell supporting SBFD operation is configured as an SCell.

[0209] The motivation for using a reference BWP is to enable the gNB to use the SBFD subbands for SBFD configuration and flexible DL / UL scheduling in a TDD cell that supports SBFD operation, which can increase cell aggregation and UE peak throughput as well as spectral efficiency. The benefit of providing a reference BWP is that the gNB can adjust the UL transmission using the SBFD mode on only UL scheduling or flexible symbols to control and set separate UL transmission bandwidth settings for the flexible symbols and uplink symbols of the UE respectively. It is possible to avoid the (single) active UL BWP from determining the allowed UL transmission bandwidth for any UL transmission for the UE in flexible symbols and in UL only. The benefit is that the SBFD operation on symbol type "D" can be configured separately compared to the SBFD operation on symbol type "F". Then, the SBFD operation on symbol type "F" can be configured separately for the UE with respect to the reference DL BWP or reference UL BWP of the UE, such that when switching to only DL or only UL or SBFD transmit and / or receive modes on symbols of type "F" is supported, the SBFD DL subband, SBFD UL subband, and / or SBFD guard band need to be configured, indicated, or assigned on the symbol type according to the possible different requirements of the gNB SIC implementation. For example, the separate sizes of the SBFD guard band configuration can be indicated to the UE or determined by the UE on symbol type "F", where compared to symbols of type "D" where a legacy UE may only be scheduled for DL transmission, the legacy UE can also be scheduled for UL transmission in the SBFD UL subband. The benefit when using a reference BWP is that the implementation complexity of the UE modem is reduced. It can be expected that the frequency domain occupancy of the SBFD DL subband, SBFD UL subband, or SBFD guard band configuration on the symbol is generally an attribute of the NR carrier BW and the available operator frequency band segment in a TDD deployment. For example, the frequency domain location and size of the SBFD UL subband in the NR carrier BW are then selected by the operator according to the coexistence requirements of the NR deployment and according to the full-duplex implementation on the gNB side. The DL BWP and UL BWP for the UE determine the UE receive and UE transmit bandwidths in the NR DL carrier bandwidth and NR UL carrier bandwidth respectively. When a reference BWP is specified, the benefit for UE implementations that support multiple BWPs (e.g., Rel-15 NR Feature Group (FG) FG 6-2 or 6-4) is that it is possible to avoid the need to calculate and store the SBFD subband configuration indicated or determined on the symbol multiple times (e.g., calculate and store multiple times for each BWP) and have to load it into the memory when the active BWP of the UE is switched. The SBFD DL subband, SBFD DL subband, or SBFD guard band on the symbol can be indicated to the UE or determined by the UE separately from the active UE DL and UL BWPs that determine the DL receive and UL transmit bandwidths on the symbol respectively.

[0210] For example, the CRB grid can be used to reference the RB number, regarding which the UE determines the frequency-domain occupancy of the SBFD DL sub-band, SBFD UL sub-band, or SBFD guard band based on the reference BWP.

[0211] For example, the reference BWP can correspond to the actual or configured UE BWP. The UE can be configured with multiple DL BWPs on the serving cell, e.g., up to 4, where a single DL BWP is active at a given time. It is expected that the UE does not receive PDSCH, PDCCH, or CSI-RS (except for RRM) outside the active BWP. The UE can be configured with multiple UL BWPs on the serving cell, e.g., up to 4, where a single UL BWP is active at a given time. The UE does not transmit PUSCH or PUCCH outside the active BWP. For operation using unpaired spectrum, it is expected that the UE may not receive a configuration where the center frequency of the DL BWP is different from the center frequency of the UL BWP, where the BWP-Id of the DL BWP is the same as the BWP-Id of the UL BWP. Even if the same BWP-Id is configured for the BWP pair, the first bandwidth of the UE DL BWP can be the same as or different from the second bandwidth of the UE UL BWP. The first bandwidth of the UE DL BWP (or UL BWP) can be the same as or different from the second bandwidth of another UE DL BWP (or UL BWP) configured for the UE in a TDD serving cell. When the UE supports multiple configured DL BWPs (e.g., 2 or 4), one of the configured DL BWPs from a set can be determined by the UE or indicated to the UE as the reference DL BWP. When the UE supports multiple configured UL BWPs (e.g., 2 or 4), one of the configured UL BWPs from a set can be determined by the UE or indicated to the UE as the reference UL BWP.

[0212] For example, when multiple DL BWPs are configured for a UE, one of the configured DL BWPs can indicate to the UE or be determined by the UE as a reference DL BWP so that the UE can determine the frequency-domain occupancy of the SBFD DL subband, SBFD UL subband, or SBFD guard band on a symbol. The UE uses the provided or determined parameters of the reference DL BWP associated with the reference BWP to determine the frequency-domain occupancy rate of the SBFD DL subband, SBFD UL subband, or SBFD guard band on a symbol, for example, based on the NR DL carrier BW. When the reference DL BWP is the active DL BWP, the DL reception BW of the UE is determined by the DL BWP on the serving cell. For example, the RBs of the SBFD DL subband outside the active DL BWP may not be available for the UE's DL reception. When the reference DL BWP is not the active DL BWP, the UE determines the frequency-domain occupancy of the SBFD DL subband, SBFD UL subband, or SBFD guard band based on the reference DL BWP, and the UE determines the DL reception BW based on the active DL BWP on the serving cell. For example, the RBs of the SBFD DL subband determined based on the reference DL BWP but outside the active DL BWP may not be available for the UE's DL reception.

[0213] For example, when multiple UL BWPs are configured for a UE, one of the configured UL BWPs can indicate to the UE or be determined by the UE as a reference UL BWP so that the UE can determine the frequency-domain occupancy of the SBFD DL subband, SBFD UL subband, or SBFD guard band on a symbol. The UE uses the provided or determined parameters of the reference UL BWP associated with the reference BWP to determine the frequency-domain occupancy rate of the SBFD DL subband, SBFD UL subband, or SBFD guard band on a symbol, for example, based on the NR UL carrier BW. When the reference UL BWP is the active UL BWP, the UL transmission BW of the UE is determined by the UL BWP on the serving cell. For example, the RBs of the SBFD UL subband outside the active UL BWP may not be available for the UE's UL transmission. When the reference UL BWP is not the active UL BWP, the UE determines the frequency-domain occupancy of the SBFD DL subband, SBFD UL subband, or SBFD guard band based on the reference UL BWP, and the UE determines the UL transmission BW based on the active UL BWP on the serving cell. For example, the RBs of the SBFD UL subband determined based on the reference UL BWP but outside the active UL BWP may not be available for the UE's UL transmission.

[0214] For example, a reference BWP for a UE to determine the frequency-domain occupancy of an SBFD DL sub-band, an SBFD UL sub-band, or an SBFD guard band on a symbol can be indicated as a default DL BWP or a default UL BWP, e.g., a DL BWP or a UL BWP that will be used by the UE when a BWP inactivity timer expires.

[0215] For example, a reference BWP configuration for the DL or UL direction can correspond to a hypothesized or virtual BWP. Parameters such as SCS, CP, frequency-domain occupancy (e.g., start RB and number of consecutive RBs), and / or a virtual BWP ID of the hypothesized or virtual BWP can be provided to the UE or determined by the UE. The UE uses the provided or determined parameters of the hypothesized or virtual BWP associated with the reference BWP to separately determine the frequency-domain occupancy of an SBFD DL sub-band, an SBFD UL sub-band, or an SBFD guard band on the symbol based on the active UE DL BWP or active UE UL BWP on the symbol, e.g., where the active UE BWP is from a set of configured BWPs.

[0216] For example, separate reference BWPs (e.g., using separate parameter BWP-Id) can be provided to the UE as a first DL reference BWP and a second UL reference BWP respectively, or the same BWP pair (e.g., using the same parameter BWP-Id) can be provided to the UE as a reference BWP or a reference BWP pair for DL and UL.

[0217] Based on conditions such as the transmission direction of a symbol, information for determining a first frequency-domain occupancy or configuration of an SBFD DL sub-band, an SBFD DL sub-band, and / or an SBFD guard band on the symbol based on a first reference BWP can be provided to the UE (e.g., 111, 112, 113, etc.), and information for determining a second frequency-domain occupancy or configuration of an SBFD DL sub-band, an SBFD DL sub-band, and / or an SBFD guard band on the symbol based on a second reference BWP can be provided to the UE.

[0218] For example, for the case where the transmission direction of a symbol of type "F" is indicated or assigned for only DL reception of the UE, or for the case of DL reception by the UE / UL transmission from the UE where an SBFD type is indicated or determined for the symbol, the UE can determine a first frequency-domain occupancy or configuration of an SBFD DL sub-band, an SBFD DL sub-band, and / or an SBFD guard band on the symbol based on the reference DL BWP. For the case where the transmission direction of a symbol of type "F" is indicated or assigned for only UL transmission from the UE, the UE determines a second frequency-domain occupancy or configuration of an SBFD DL sub-band, an SBFD UL sub-band, and / or an SBFD guard band on the symbol based on the reference UL BWP.

[0219] For example, the reference BWP for a UE to determine the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band on a downlink symbol (i.e., a symbol of type "D") can be the UE DL BWP. When the symbol is determined by the UE or indicated to the UE for DL reception only and / or SBFD operation, the reference BWP for determining the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band on a flexible symbol (i.e., a symbol of type "F") can be the UE DL BWP, or when the symbol is determined by the UE or indicated to the UE for UL transmission only, the reference BWP can be the UE UL BWP. The reference BWP for determining the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band on an uplink symbol (i.e., a symbol of type "U") can be the UE UL BWP, for example when SBFD operation using an SBFD DL subband is supported on a symbol of type "U".

[0220] In a further example, when the symbol is determined by the UE or indicated to the UE for UL transmission only and / or SBFD operation, the reference BWP for the UE to determine the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band on a flexible symbol (i.e., a symbol of type "F") can be a virtual UL BWP, where UL transmission can be at least scheduled or assigned within the SBFD UL subband on the symbol. When determining that the flexible symbol is determined by the UE or indicated to the UE as an uplink symbol or for UL transmission in an SBFD UL subband based on a virtual reference BWP, the UE determines the allowed or possible UL transmission BW on the flexible symbol. The UE determines the allowed or possible UL transmission bandwidth of the uplink symbol based on the active UE UL BWP.

[0221] In another example, for a secondary cell (i.e., an SCell configured for a UE in carrier aggregation or dual connectivity), the reference BWP for the UE to determine the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band can be provided to the UE or determined by the UE. The UE determines the frequency-domain occupancy of an SBFD DL subband, an SBFD UL subband, or an SBFD guard band based on the reference BWP provided or determined for the SCell.

[0222] Figure 16 An example UE processing flow chart 1600 for determining an SBFD subband configuration based on a reference BWP is shown. The UE processing flow chart 1600 can be implemented in part by any UE (e.g., 111, 112, or 113, etc.) of the radio network 100 in combination with a gNB (e.g., 101, 102, or 103, etc.).

[0223] Provide a TDD UL-DL frame configuration (1610) containing one or more flexible symbols in a corresponding time slot to the UE. For example, when the UE is in the RRC_CONNECTED mode, the TDD UL-DL frame configuration can be indicated to the UE in SIB1 or IE ServingCellConfigCommon. Provide DL BWP and UL BWP configurations (1620) to the UE. For example, the UE can be configured with one or more DL BWPs and one or more UL BWPs. Provide an SBFD sub-band configuration (1630) to the UE. For example, the UE can be configured with SBFD DL sub-bands, SBFD UL sub-bands, or SBFD guard bands on one or more symbols, where the symbols can be of different types, such as "D" or "F". For example, for the "D" and "F" symbol types, the UE can be configured with an SBFD configuration of type "DUD", that is, two SBFD DL sub-bands and one SBFD UL sub-band. For example, the same or different SBFD configurations of symbol type "D" and symbol type "F" can be provided to the UE. Provide a reference BWP for SBFD symbols (1640) to the UE. For example, the reference BWP can indicate the frequency-domain occupancy or the starting RB and the consecutive number of RBs. For example, the reference BWP can be a configured DL BWP or a configured UL BWP, or can be a virtual reference BWP. The UE determines the transmission direction of the flexible symbol (1650). For example, the transmission direction of the flexible symbol can be indicated to the UE through DCI of DL assignment or UL grant or based on the received group common DCI (such as SFI). The UE determines the RB group for transmission and / or reception based on the SBFD sub-band configuration (for example, for transmission in the SBFD UL sub-band or for reception in the SBFD DL sub-band) and based on the BWP. For example, when the flexible symbol is indicated for DL reception, the UE determines the RB group based on the DL BWP (1660), when the flexible symbol is indicated for both transmission and reception (such as in SBFD operation), the UE determines the RB group based on the reference BWP (1670), and when the flexible symbol is indicated for UL transmission, the UE determines the RB group based on the UL BWP (1680). Then, the UE receives the DL signal or channel or transmits the UL signal or channel on the symbols in the RBs determined for reception or transmission (1690).

[0224] In another embodiment, a first SBFD UL subband configuration and a second SBFD UL subband configuration are provided to the UE via higher layer signaling. The first SBFD UL subband configuration and the second SBFD UL subband configuration may indicate different time domain resource sets for SBFD operations to the UE. The first SBFD UL subband configuration and the second SBFD UL subband configuration may indicate different frequency domain resources configured for SBFD operations on symbols or time slots.

[0225] In other embodiments, a first SBFD UL subband configuration for a plurality of SBFD symbols or time slots is provided to the UE via higher layer signaling. The frequency position of the SBFD UL subband may be provided by providing a starting RB and an allocated bandwidth, an RIV / SLIV value, a number of RBs, or a bitmap. The SBFD UL subband configuration with respect to the CRB grid may be indicated to the UE. Alternatively, the SBFD UL subband allocation with respect to a configurable BWP may be indicated to the UE. Alternatively, the SBFD UL subband allocation may be indicated using a configurable reference RB and may be represented with respect to a reference SCS. The time domain position of the first SBFD UL subband may be provided by providing a list of symbols or time slots, using the start or end of a time slot or a run length, or a bitmap associating bits with one or more symbols or time slots. The time domain position of the second SBFD UL subband is provided to the UE by a list of symbols or time slots, using the start or end of a time slot or a run length, or a bitmap associating bits with one or more symbols or time slots. For example, the indicated time domain position of the second SBFD UL subband may be the same, or may only include a subset of the entries provided by the first SBFD UL subband configuration. For example, the frequency positions of the first SBFS UL subband configuration and the second SBFS UL subband configuration on an SBFD symbol or in an SBFD time slot may be the same and not separately indicated by the higher layer, or they may be different for some or all of the time domain resources. The UE determines that UL transmission is schedulable or configurable in the SBFD symbol / slot indicated by the first SBFD UL subband configuration. The UE determines that DL transmission using the configured or indicated SBFD UL subband is schedulable or configurable in the SBFD symbol / slot of the second SBFD UL subband configuration.

[0226] Reference Figure 17 and Figure 18 , an indication of the DL schedulable symbol / slot of the RRC associated with the UL subband configuration can be determined. Figure 17 shows one of several possible configurations 1700 that may be implemented by a UE (e.g., 111, 112, 113, etc.), and Figure 18 shows a UE processing flow diagram of a method 1800 for determining the DL schedulable symbol / slot associated with the UL subband configuration.

[0227] Method 1800 begins with the UE receiving UL SB configuration #2 for SBFD symbols (1810). The UE then receives UL SB configuration #1 for SBFD symbols (1820). Then, when the SBFD UL SB is enabled by configuration #1 and indicated by #2 on the symbol, the UE determines that DL scheduling is enabled (1830). The UE then adjusts the modem settings, for example, by calculating, loading, and / or applying filter settings (1840). The UE then receives a DL signal or channel or transmits a UL signal or channel on the SBFD symbol (1850).

[0228] In one example, for illustrative purposes, using band n78 and SCS = 30 kHz, the NR carrier BW for UL transmission and DL reception is 273 RBs, numbered from 0 to 272. The DL BWP and UL BWP of the UE are 200 RBs and correspond to RBs 0 to 199 of the NR carrier BW. The first SBFD UL subband allocation and the second SBFD UL subband allocation on RBs 100 to 150 on the SBFD symbol are provided to the UE by higher layer signaling. The first SBFD UL subband allocation indicates all symbols in SBFD time slots #2 and #3. The second SBFD UL subband allocation indicates all symbols in SBFD time slot #3. The UE determines that only UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 in the UL subband in SBFD time slot #2. The UE determines that DL or UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 in the UL subband in SBFD time slot #3.

[0229] In another example, for illustrative purposes, using band n78 and SCS = 30 kHz, the NR carrier BW for UL transmission and DL reception is 273 RBs, numbered from 0 to 272. The UE's DL BWP and UL BWP are 200 RBs and correspond to RBs 0 to 199 of the NR carrier BW. The first SBFD UL sub-band allocation and the second SBFD UL sub-band allocation on RBs 100 to 150 of the SBFD symbols are provided to the UE by higher layer signaling. The first SBFD UL sub-band allocation indicates symbols #2 - 13 in SBFD time slots #2 and #3, and the second SBFD UL sub-band allocation indicates symbols #0 - 1 in SBFD time slots #3 and #2, where the symbol numbering in a time slot starts with #0. The UE determines that only UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 of the UL sub-band in symbols #2 - 13 of SBFD time slots #2 and #3. The UE determines that DL or UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 of the UL sub-band in symbols #0 - 1 of SBFD time slots #2 and #3. For example, symbols #0 and #1 can then be used by the gNB for PDCCH transmission during SBFD operation.

[0230] In other embodiments, the first SBFD UL subband configuration of multiple SBFD symbols or time slots is provided to the UE via higher layer signaling. The frequency position of the SBFD UL subband can be provided by providing the starting RB and the allocated bandwidth, RIV / SLIV value, number of RBs, or a bitmap. The SBFD UL subband configuration with respect to the CRB grid can be indicated to the UE. Alternatively, the SBFD UL subband allocation with respect to the configurable BWP can be indicated to the UE. Alternatively, the SBFD UL subband allocation can be indicated to the UE using the configurable reference RB and can be represented with respect to the reference SCS. The time domain position of the first SBFD UL subband can be indicated by providing a list of symbols or time slots, using the start or end of a time slot or the run length, or a bitmap associating bits with one or more symbols or time slots. The frequency position or the time domain position of the second SBFD UL subband configuration is provided to the UE in a similar manner. For example, the indicated frequency domain and time domain positions of the second SBFD UL subband can be the same, or can include only a subset of the corresponding entries provided by the first SBFD UL subband configuration. For example, the frequency positions of the first SBFS UL subband configuration and the second SBFS UL subband configuration on the SBFD symbol or in the SBFD time slot can be the same and not separately indicated by the higher layer, or can be different for some or all of the time domain resources. The UE determines that UL transmission is schedulable or configurable in the SBFD UL subband allocation on the symbols indicated by the first SBFD UL subband configuration. The UE determines that DL reception using the configured or indicated SBFD UL subband is schedulable or configurable on the SBFD symbols / time slots using the second SBFD UL subband configuration.

[0231] In one example, for illustrative purposes, using band n78 and SCS = 30 kHz, the NR carrier BW for UL transmission and DL reception is 273 RBs, numbered from 0 to 272. The UE's DL BWP and UL BWP are 200 RBs and correspond to RBs 0 to 199 of the NR carrier BW. The first SBFD UL sub-band allocation indicating RBs 100 to 150 and the second SBFD UL sub-band allocation indicating RBs 130 to 150 on the same SBFD symbol are provided to the UE by higher layer signaling. For simplicity and illustrative purposes, it is assumed that both SBFD UL sub-band allocations indicate the same set of symbols, such as all symbols in SBFD time slots #2 and #3. The UE determines that only UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 129 in SBFD time slots #2 and #3 of the first SBFD UL sub-band configuration. RBs #130 to 150 are also indicated as part of the second SBFD UL sub-band configuration. The UE determines that DL reception or UL transmission can be scheduled or configured by the gNB on the indicated RBs 130 to 150 in SBFD time slots #2 and #3 that are indicated as DL scheduling grants or permissions.

[0232] In another example, for illustrative purposes, using band n78 and SCS = 30 kHz, the NR carrier BW for UL transmission and DL reception is 273 RBs, numbered from 0 to 272. The DL BWP and UL BWP are 200 RBs and correspond to RBs 0 to 199 of the NR carrier BW. The first SBFD UL sub-band allocation indicating RBs 100 to 150 is provided to the UE by higher layer signaling. For simplicity and illustrative purposes, it is assumed that the first SBFD UL sub-band allocation indicates all symbols in SBFD time slots #2 and #3. A second SBFD configuration associated with the transmission type "DUD" for the symbols in SBFD time slot #2 and the transmission types {"DUD", "DDD"} for the symbols in time slot #3 is provided to the UE. The UE determines that only UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 in SBFD time slot #2 of the first SBFD UL sub-band configuration. The UE determines that DL or UL transmission can be scheduled or configured by the gNB on the indicated RBs 100 to 150 indicated by the first SBFD UL sub-band configuration in SBFD time slot #3.

[0233] Another distinct advantage of the embodiments disclosed herein is that the DL and UL scheduling behavior for portions of the SBFD UL subbands can be configured by the gNB during SBFD operation. The flexibility in using the SBFD UL subbands for DL and UL scheduling on SBFD symbols or time slots can be restricted to a desired subset of time domain resources or frequency domain resources in the SBFD UL subband configuration. This enables a reduction in the complexity of the UE modem when implementing Tx or Rx side filtering on the SBFD UL or UL subbands.

[0234] When a symbol-level granularity configuration for SBFD configuration using higher layer signaling is desired, e.g., when the UE is in the RRC_CONNECTED mode, an SBFD UL subband configuration can be provided for each symbol or symbol group for the UE to determine the allowed or disallowed transmission behavior. When determining the position or size of the UL subband on the second symbol, the UE can assume a first reference symbol configuration. For example, the UE can use the SBFD UL subband configuration provided for symbol #m to determine the frequency position and size of the transmission behavior on symbol #n in a time slot, frame, or reference period.

[0235] In another embodiment, a first SBFD subband configuration and a second SBFD subband configuration associated with different RRC states are provided to the UE. The first SBFD subband configuration can be associated with the SBFD operation of a UE in the RRC_IDLE / INACTIVE mode, and the second SBFD subband configuration can be associated with the SBFD operation of a UE in the RRC_CONNECTED mode. The first SBFD subband configuration and the second SBFD subband configuration can indicate to the UE different sets of time domain resources configured for SBFD operation. The first SBFD subband configuration and the second SBFD subband configuration can indicate to the UE different frequency domain resources configured for SBFD operation on symbols or time slots. One of the first SBFD subband configuration and the second SBFD subband configuration can indicate to the UE only some SBFD subband types, e.g., SBFD UL subbands, SBFD DL subbands, or SBFD guard bands. The first SBFD subband configuration can refer to the second SBFD subband configuration to indicate the SBFD time domain or frequency domain position with a reduced allocation granularity in the time domain or frequency domain.

[0236] In some embodiments, a first SBFD sub-band configuration indicating only the SBFD UL sub-band for a plurality of SBFD symbols or time slots is provided to a UE in RRC_IDLE / INACTIVE mode via higher layer signaling (e.g., SIB1). The frequency position of the SBFD UL sub-band can be provided by providing the starting RB and the allocated bandwidth, RIV / SLIV value, number of RBs, or a bitmap. The SBFD UL sub-band configuration with respect to the CRB grid can be indicated to the UE. Alternatively, the SBFD UL sub-band allocation with respect to a configurable BWP (e.g., the initial UL BWP) can be indicated to the UE. Alternatively, the SBFD UL sub-band allocation can be indicated using a configurable reference RB and can be represented with respect to the reference SCS. The time domain position of the first SBFD UL sub-band can be provided by providing a list of symbols or time slots, using the start or end of a time slot or the run length, or a bitmap associating bits with one or more symbols or time slots. A second SBFD sub-band configuration is provided to a UE in RRC_CONNECTED mode, which indicates the SBFD UL and DL sub-bands or alternatively uses a signaling message (e.g., RRC_SETUP or RRC_RECONFIGURATION) to indicate the SBFD uplink sub-band and the guard band. The frequency domain or time domain allocation of the second SBFD UL sub-band configuration can be indicated in a manner such as described in the case of the first SBFD sub-band configuration.

[0237] The indicated SBFD sub-band types of the first SBFD sub-band configuration and the second SBFD sub-band configuration can be the same or different. For example, the first SBFD sub-band configuration associated with SBFD operation in RRC_IDLE / INACTIVE mode can indicate only the SBFD UL SB. The second SBFD sub-band configuration associated with SBFD operation in RRC_CONNECTED mode can indicate the SBFD UL and DL sub-bands.

[0238] For the first SBFD sub - band configuration and the second SBFD sub - band configuration, the time - domain SBFD symbol / slot or frequency - domain allocation granularity can be the same or different. For example, the first SBFD sub - band configuration associated with SBFD operation in RRC_IDLE / INACTIVE mode can indicate the possible SBFD UL sub - band size as an integer multiple of N RBs, where, for illustrative purposes, N = 4 or 8. The second SBFD sub - band configuration associated with SBFD operation in RRC_CONNECTED mode can indicate the possible SBFD UL sub - band size with M RB resolution, where, for illustrative purposes, M = 1. For example, the first SBFD sub - band configuration associated with SBFD operation in RRC_IDLE / INACTIVE mode can indicate the possible SBFD time - domain allocation as an integer multiple of N symbols, where, for illustrative purposes, N = 7 or 14. The second SBFD sub - band configuration associated with SBFD operation in RRC_CONNECTED mode can indicate the possible SBFD time - domain allocation with M symbol resolution, where, for illustrative purposes, M = 1.

[0239] The first SBFD sub - band configuration and the second SBFD sub - band configuration can indicate SBFD operations on disjoint sets of SBFD symbols / slots or RBs, can share some SBFD symbols or slots or RBs, or the time - domain and frequency - domain resources indicated for SBFD operation in one SBFD sub - band configuration can be included as a subset in other SBFD sub - band configurations.

[0240] Reference Figure 19 and Figure 20 , for example, the frequency positions of the first SBFD sub - band configuration and the second SBFD sub - band configuration on the SBFD symbol or in the SBFD slot can be the same or different. For example, as Figure 19 shown, the indicated time - domain position of the first SBFD sub - band configuration can be the same as that of the second SBFD sub - band configuration, or can only include a subset of the entries provided by the second SBFD sub - band configuration. Figure 20 FIG. 2000 shows a UE processing flow chart of a method for determining an applicable SBFD sub - band configuration associated with an RRC state (such as but not limited to RRC_IDLE / INACTIVE or RRC_CONNECTED).

[0241] Method 2000 starts with the UE receiving SBFD configuration #1 (2010) in the SIB1 msg for RRC_IDLE. Then, the UE applies SBFD configuration #1 and establishes an RRC connection (2020). Then, the UE receives SFBD configuration #2 (2030) in the RRC_RECONFIGURATION msg for RRC_CONNECTED. The UE then stops using SBFD configuration #1 and applies SBFD configuration #2, 2040. When in RRC_CONNECTED, the UE expects to perform DL reception and UL transmission on the SBFD symbols configured according to #2 (2050). The UE then receives a DL signal or channel or transmits a UL signal or channel on the SBFD symbols (2060).

[0242] In one example, for illustrative purposes, using band n78 and SCS = 30 kHz, the NR carrier BW for UL transmission and DL reception is 273 RBs, numbered from 0 to 272. CORESET#0 that determines the initial DL BWP when the UE is in RRC_IDLE / INACTIVE is configured with 48 RBs on RBs #120 to 167. The DL BWP and UL BWP of the UE when in RRC_CONNECTED are 200 RBs, provided to the UE using the RRC_RECONFIGURATION message, and correspond to RBs 0 to 199 of the NR carrier BW. The first SBFD subband configuration in SIB1 is provided to the UE, which indicates the SBFD UL subband allocation on RBs 120 to 167 for all symbols in slot #3. The second SBFD UL subband allocation when in RRC_CONNECTED indicates to the UE all symbols in SBFD slots #2 and 3 and RBs 100 to 150 for SBFD operation. During initial access, the UE determines that UL transmission can be scheduled or configured by the gNB on the indicated RBs 120 to 167 of the UL subband indicated in SIB1 in SBFD slot #3. After successful RRC connection establishment of the UE, for example, after transitioning to the RRC_CONNECTED mode, the UE determines that UL transmission using the SBFD UL subband can be scheduled or configured by the gNB on the indicated RBs 100 to 150 of the UL subband valid for the RRC_CONNECTED mode in SBFD slots #2 and #3.

[0243] In various embodiments of the present disclosure, when separate SBFD subband configurations are provided for UEs in RRC_IDLE / INACTIVE and RRC_CONNECTED modes respectively, the advantage is that SBFD operations can be controlled independently. A limited number of SBFD symbols / slots or a limited set of controlled SBFD UL RBs can be used for SBFD UL transmissions to UEs in RRC_IDLE / INACTIVE mode, while a complete set of SBFD symbols / slots and the SBFD UL bandwidth in the SBFD symbols can be used for UEs in RRC_CONNECTED mode. When only a subset of the SBFD subband configuration (e.g., only UL subbands) is indicated to UEs in RRC_IDLE / INACTIVE mode or a smaller allocation granularity is used in the time domain or frequency domain, the SIB1 payload can be reduced. This is beneficial for maintaining DL cell coverage through SBFD operations, as SIB1 can be a coverage-limiting channel, e.g., for UEs with reduced capabilities (such as a reduced number of receiver antennas). For UEs in RRC_CONNECTED mode, full flexibility can be achieved, e.g., SBFD configurations at the symbol level and per-RB granularity.

[0244] Any of the above-described variant embodiments can be used independently or in combination with at least one other variant embodiment.

[0245] The above flowcharts illustrate example methods that can be implemented in accordance with the principles of the present disclosure, and various changes can be made to the methods illustrated in the flowcharts herein. For example, although shown as a series of steps, the individual steps in each figure can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, steps can be omitted or replaced by other steps.

[0246] Although the figures illustrate different examples of user equipment, various changes can be made to the figures. For example, the user equipment can include any number of each component arranged in any suitable manner. Generally, the figures do not limit the scope of the present disclosure to any particular configuration. Additionally, although the figures illustrate an operating environment in which various user equipment features disclosed in this patent document can be used, these features can be used in any other suitable system.

[0247] Although the present disclosure has been described with exemplary embodiments, various changes and modifications can be conceived by those skilled in the art. The present disclosure is intended to embrace such changes and modifications that fall within the scope of the appended claims. No description in this application should be construed as implying that any particular element, step, or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving first information of a first set of parameters of a first frequency-domain subband associated with an uplink (UL) bandwidth for transmission on a cell; receiving second information of a second set of parameters of a second frequency-domain subband associated with a downlink (DL) bandwidth for reception on the cell; determining a third frequency-domain subband on a symbol based on the first frequency-domain subband, the second frequency-domain subband, and a reference bandwidth, wherein: at least one of the first frequency-domain subband and the second frequency-domain subband is one of a subband full duplex (SBFD) DL subband, an SBFD flexible subband, or an SBFD UL subband, and the reference bandwidth is one of a carrier bandwidth, a bandwidth part (BWP), or a frequency-domain allocation having an upper limit and a lower limit; and performing reception or transmission on the symbol, wherein frequency-domain resources of the third frequency-domain subband are not available for reception or transmission on the symbol on the cell.

2. The method according to claim 1, wherein determining the third frequency-domain subband on the symbol further comprises determining the third frequency-domain subband based on the first frequency-domain subband or the second frequency-domain subband of another symbol.

3. The method according to claim 1, wherein: determining the third frequency-domain subband on the symbol further comprises determining the third frequency-domain subband based on a frequency-domain limit (FDL) value, the FDL value being associated with a minimum or maximum frequency-domain allocation value of the reference bandwidth, and performing reception or transmission on the symbol further comprises performing reception or transmission on the symbol based on the minimum or maximum frequency-domain allocation value.

4. The method according to claim 1, wherein: determining the third frequency-domain subband on the symbol further comprises determining the third frequency-domain subband based on a frequency-domain allocation size (FDAS) value, the FDAS value being associated with a minimum or maximum FDAS value of a frequency-domain subband, the method further comprising determining a size of the third frequency-domain subband based on the minimum or maximum FDAS value.

5. The method according to claim 1, wherein determining the third frequency-domain subband on the symbol further comprises determining the third frequency-domain subband based on a reference bandwidth of another symbol.

6. The method according to claim 1, wherein: the reference bandwidth corresponds to one of a plurality of configured DL or UL BWPs or is provided as a virtual BWP.

7. A user equipment (UE), comprising: a transceiver configured to: receive first information of a first set of parameters of a first frequency-domain subband associated with an uplink (UL) bandwidth for transmission on a cell; and receive second information of a second set of parameters of a second frequency-domain subband associated with a downlink (DL) bandwidth for reception on the cell; and a processor configured to determine a third frequency-domain subband on a symbol based on the first frequency-domain subband, the second frequency-domain subband, and a reference bandwidth wherein at least one of the first frequency domain subband and the second frequency domain subband is one of a subband full duplex SBFD DL subband, an SBFD flexible subband, or an SBFD UL subband, wherein the reference bandwidth is one of a carrier bandwidth, a bandwidth part BWP, or a frequency domain allocation having an upper limit and a lower limit. wherein the transceiver is further configured to receive or transmit on the symbol, and wherein the frequency domain resources of the third frequency domain subband are not available for reception or transmission on the symbol on the cell.

8. The UE according to claim 7, wherein: the processor is further configured to determine the third frequency domain subband based on a frequency domain limit FDL value, the FDL value is associated with a minimum or maximum frequency domain allocation value of the reference bandwidth, and wherein the transceiver is further configured to receive or transmit on the symbol based on the minimum or maximum frequency domain allocation value.

9. The UE according to claim 7, wherein: the processor is further configured to determine the third frequency domain subband based on a frequency domain allocation size FDAS value, the FDAS value is associated with a minimum or maximum FDAS value of a frequency domain subband, the processor is further configured to determine the size of the third frequency domain subband based on the minimum or maximum FDAS value.

10. The UE according to claim 7, wherein: the reference bandwidth corresponds to one of a plurality of configured DL or UL BWPs or is provided as a virtual BWP.

11. A base station BS, comprising: a transceiver configured to: transmit first information of a first set of parameters of a first frequency domain subband associated with an uplink UL bandwidth for reception on a cell; and transmit second information of a second set of parameters of a second frequency domain subband associated with a downlink DL bandwidth for transmission on the cell; and a processor configured to determine a third frequency domain subband on a symbol based on the first frequency domain subband, the second frequency domain subband, and a reference bandwidth, wherein at least one of the first frequency domain subband and the second frequency domain subband is one of a subband full duplex SBFD DL subband, an SBFD flexible subband, or an SBFD UL subband, wherein the reference bandwidth is one of a carrier bandwidth, a bandwidth part BWP, or a frequency domain allocation having an upper limit and a lower limit, wherein the transceiver is further configured to receive or transmit on the symbol, and wherein the frequency domain resources of the third frequency domain subband are not available for reception or transmission on the symbol on the cell.

12. The BS according to claim 11, wherein, the processor is further configured to determine the third frequency domain subband based on the first frequency domain subband or the second frequency domain subband of another symbol.

13. The BS according to claim 11, wherein: the processor is further configured to determine the third frequency domain subband based on a frequency domain limit FDL value, the FDL value is associated with a minimum or maximum frequency domain allocation value of the reference bandwidth, and wherein the transceiver is further configured to receive or transmit on the symbol based on the minimum or maximum frequency domain allocation value.

14. The BS according to claim 11, wherein: The processor is further configured to determine the third frequency-domain sub-band based on the frequency-domain allocation size (FDAS) value, wherein the FDAS value is associated with the minimum or maximum FDAS value of the frequency-domain sub-band, and the processor is further configured to determine the size of the third frequency-domain sub-band based on the minimum or maximum FDAS value.

15. The BS according to claim 11, wherein: the processor is further configured to: determine the third frequency-domain sub-band based on one of a reference bandwidth corresponding to one of a plurality of configured DL or UL BWPs or a reference bandwidth of another symbol.

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