Method and apparatus for transmission and reception in full duplex system

Abstract

Methods and apparatus for transmission and reception in a full duplex system. A method of operating a user equipment (UE) includes receiving a first candidate subband full duplex (SBFD) configuration associated with a first transmission configuration indicator (TCI) state configuration on a cell; receiving a second candidate SBFD configuration associated with a second TCI state configuration on the cell; and identifying the TCI state code point. The method further includes (i) selecting a first candidate SBFD configuration when the value of the TCI state code point is associated with a first TCI state configuration, or (ii) selecting a second candidate SBFD configuration when the value of the TCI state code point is associated with a second TCI state configuration, and receiving or transmitting a channel or signal based on the selected SBFD configuration.

Description

TECHNICAL FIELD

[0001] The disclosure relates generally to a wireless communication system, and more particularly, the disclosure relates to transmission and reception in a full duplex system in a wireless communication system. BACKGROUND

[0002] 5G mobile communication technologies define wide frequency bands for use in mobile communication to achieve high transmission rates and new services not possible with 3G and 4G mobile communication technologies. The 5G mobile communication technologies are being implemented not only for mobile phones but also for various types of devices such as Internet of Things (IoT) devices. The 5G mobile communication technologies are considered a means of implementing the Internet of Everything (IoE), which is a combination of the IoT technology and the Internet technology. To meet the increasing demand for mobile data traffic since the 5G era, various technologies for improving the performance of mobile communication systems have been developed. For example, the 5G new radio (NR) technologies have been developed, and there are ongoing efforts to implement technologies for improving the performance of mobile communication systems such as 6th generation (6G) technologies.

[0003] At the time when the development of 5G mobile communication technologies is in progress, services and functions are being discussed that are not available in the 5G mobile communication technologies, such as the 6th generation (6G) technologies, to meet the increasing demand for mobile data traffic and to provide high-speed and high-quality services.

[0004] At present, in view of services to be supported by 5G mobile communication technologies, there are ongoing discussions on improvement and performance enhancement of initial 5G mobile communication technologies, and there are physical layer standardization discussions on technologies such as V2X (Vehicle-to-Everything) for assisting in driving determination of autonomous vehicles based on information about the position and state of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aiming to comply with various regulation-related requirements for system operation in unlicensed bands, NR UE power saving, non-terrestrial networks (NTN) as UE-satellite direct communication for providing coverage in an area where communication with a terrestrial network is unavailable, and positioning.

[0005] Further, in terms of air interface architecture / protocol, standardization is underway for technologies such as Industrial Internet of Things (IIoT) for support of new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access (2-step RACH for NR) for simplifying a random access procedure. In terms of system architecture / service, standardization is also underway for technologies such as a 5G baseline architecture for combination of network functions virtualization (NFV) and software-defined networking (SDN) technologies (e.g., service-based interface 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, connected devices, which have increased exponentially, will be connected to communication networks, and thus enhanced functionality and performance of 5G mobile communication systems and integrated operations of connected devices are expected to be necessary. For this reason, new research related to extended reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), etc., 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, drone communication, etc. is planned.

[0007] Further, such development of 5G mobile communication systems will serve as a basis for not only developing new waveforms for providing coverage in the terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as FDD-MIMO (Full Dimensional MIMO), array antennas, and massive antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RISs (Reconfigurable Intelligent Surfaces), but also developing full-duplex technologies for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technologies for implementing system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for implementing services at a level of complexity exceeding the operational capability limits of UEs by utilizing super-high-performance communication and computing resources.

[0008] With the global technology activities of various candidate technologies from industry and academia, the fifth generation (5G) or new radio (NR) mobile communication is recently gaining momentum. The candidate enabling technologies of 5G / NR mobile communication include massive antenna technology from a traditional cellular band to a high frequency to provide beamforming gain and support increased capacity, a new waveform (e.g., new radio access technology (RAT)) to flexibly accommodate various services / applications with different requirements, a new multiple access scheme to support massive connectivity, etc. SUMMARY

[0009] The disclosure relates to transmission and reception in full duplex systems in a wireless communication system.

[0010] In one embodiment, a method of operating a user equipment (UE) is provided. The method includes receiving a first candidate sub-band full duplex (SBFD) configuration associated with a first transmission configuration indicator (TCI) state configuration on a cell, receiving a second candidate SBFD configuration associated with a second TCI state configuration on the cell, and identifying a TCI state codepoint. The method further includes (i) selecting the first candidate SBFD configuration when a value of the TCI state codepoint is associated with the first TCI state configuration, or (ii) selecting the second candidate SBFD configuration when the value of the TCI state codepoint is associated with the second TCI state configuration, and receiving or transmitting a channel or a signal based on the selected SBFD configuration. Wherein the value of the TCI state codepoint is from a set of values associated with a set of transmit-receive points (TRPs).

[0011] In another embodiment, a UE is provided. The UE includes a transceiver configured to receive a first candidate SBFD configuration associated with a first TCI state configuration on a cell, and receive a second candidate SBFD configuration associated with a second TCI state configuration on the cell. The UE further includes a processor operably coupled to the transceiver. The processor is configured to identify a TCI state codepoint, and (i) select the first candidate SBFD configuration when a value of the TCI state codepoint is associated with the first TCI state configuration, or (ii) select the second candidate SBFD configuration when the value of the TCI state codepoint is associated with the second TCI state configuration. The transceiver is further configured to receive or transmit a channel or a signal based on the selected SBFD configuration. The value of the TCI state codepoint is from a set of values associated with a set of TRPs.

[0012] In yet another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to transmit a first SBFD configuration associated with a first TCI state configuration on a cell, transmit a second candidate SBFD configuration associated with a second TCI state configuration on the cell, and receive or transmit a channel or a signal associated with the SBFD configuration. The SBFD configuration is in accordance with (i) the first candidate SBFD configuration when a value of a TCI state codepoint is associated with the first TCI state configuration, or (ii) the second candidate SBFD configuration when the value of the TCI state codepoint is associated with the second TCI state configuration. The value of the TCI state codepoint is in accordance with a set of values associated with a set of TRPs.

[0013] Other technical features can be readily apparent to one skilled in the art from the following figures, descriptions, and claims.

[0014] Before undertaking the below -detailed description, it can be advantageous to set forth definitions of certain terms 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 one another. The terms “transmit,” “receive,” and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication. The terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation. The term “or” is inclusive, meaning and / or. The phrase “associated with,” as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, be proximate to, be bound to or with, have a property of, have relations with, have agreements with, or the like. The term “controller” means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or a combination of hardware and software and / or firmware. The functionality associated with any particular controller can be centralized or distributed, whether locally or remotely. The phrase “at least one of” followed by a list of two or more items, means that any of the listed items can be employed by itself, or in combination with one or more of the listed items. For example, “at least one of A, B and C” means that A alone, B alone, C alone, A and B together, A and C together, B and C together, or A and B and C together, are all possible.

[0015] Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof. 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 media capable of storing computer readable program code, such as a solid state drive (SSD), a hard disk drive (HDD), a compact disc (CD), a digital video disc (DVD), or any other type of memory. A "non-transitory" computer readable medium excludes wired, wireless, optical, or other communication links. The non-transitory computer readable medium includes media where the data stored thereon can be permanently or semi-permanently stored and not merely transitory signals.

[0016] Definitions for other certain words and phrases are provided throughout this patent document. Those of ordinary skill in the art will understand that in many, if not most instances, such definitions apply to prior as well as future uses of such defined words and phrases. BRIEF DESCRIPTION OF DRAWINGS

[0017] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like parts are marked with like numerals:

[0018] Figure 1 An example of a wireless network is shown in accordance with an embodiment of the present disclosure;

[0019] Figure 2 An example of a base station (gNB) is shown in accordance with an embodiment of the present disclosure;

[0020] Figure 3 An example of a UE is shown in accordance with an embodiment of the present disclosure;

[0021] Figure 4 And Figure 5 An example of a wireless transmit and receive path is shown in accordance with an embodiment of the present disclosure;

[0022] Figure 6 An example of an antenna structure is shown in accordance with an embodiment of the present disclosure;

[0023] Figure 7 An example of a structure of a slot for a time division duplex (TDD) communication system is shown in accordance with an embodiment of the present disclosure;

[0024] Figure 8 An example of a structure of a slot for full duplex (FD) configuration is shown in accordance with embodiments of the present disclosure;

[0025] Figure 9 A flowchart of a UE method of determining a SBFD configuration based on TCI states for mTRP operation in full duplex communication is shown in accordance with embodiments of the present disclosure;

[0026] Figure 10 A flowchart of a UE method of determining a set of TCI states based on a SBFD configuration for mTRP operation in a full duplex communication system is shown in accordance with embodiments of the present disclosure; and

[0027] Figure 11 A flowchart of a UE method of indicating a restricted SBFD configuration for mTRP operation in a full duplex communication system is shown in accordance with embodiments of the present disclosure. DETAILED DESCRIPTION

[0028] The following discussion is presented to enable a Figures 1 to 11 The principles of the present disclosure should not be limited by the embodiments discussed below, which are merely examples of the principles 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.

[0029] The following documents are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v17.5.0, “E-UTRA, Physical channels and modulation”; 3GPP TS 36.212 v17.5.0, “E-UTRA, Multiplexing and channel coding”; 3GPP TS 36.213 v17.6.0, “E-UTRA, Physical layer procedures”; 3GPP TS 38.214 v17.6.0, “NR, Physical layer procedures for data”; 3GPP TS 38.321 v17.5.0, “NR, Medium Access Control (MAC) protocol specification”; and 3GPP TS 38.331 V17.5.0, “NR, Radio Resource Control (RRC) protocol specification”; 3GPP TS 38.133 v17.10.0, “NR; Requirements for support of radio resource management”; 3GPP TS 38.300 v17.5.0, “NR; NR and NG-RAN Overall description; Stage 2”; 3GPP TS 38.306 v17.5.0, “NR; User Equipment (UE) radio access capabilities”; 3GPP TR 38.858 v0.4.1, “Study on evolution of NR duplex operation”; and 3GPP TS 38.822 v17.1.0, “NR; User Equipment (UE) feature list”.

[0030] To meet the increased demand for wireless data services since the deployment of 4G communication systems and to enable various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in high-frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in low-frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. To reduce radio wave propagation loss and increase transmission distance, beamforming, MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive MIMO technologies are discussed in 5G / NR communication systems.

[0031] In addition, in 5G / NR communication systems, development is underway to improve system networks based on advanced small cells, cloud radio access networks (RAN) ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), and receiver interference cancellation.

[0032] The discussion of 5G systems and their associated frequency bands is for informational purposes only, as some embodiments of this disclosure can be implemented in 5G systems. However, this disclosure is not limited to 5G systems or their associated frequency bands, and embodiments of this disclosure can be utilized in combination with any frequency band. For example, aspects of this disclosure can also be applied to 5G communication systems, 6G, or even higher versions that may utilize terahertz (THz) frequency bands.

[0033] The following Figures 1-3 Various embodiments of communication technologies implemented in wireless communication systems and using orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) are described. Figures 1-3 The description does not imply any physical or architectural limitation on the ways in which different embodiments may be implemented. Different embodiments of this disclosure can be implemented in any suitably arranged communication system.

[0034] Figure 1 An example wireless network according to an embodiment of this disclosure is shown. Figure 1 The embodiments of the wireless network shown are for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0035] like Figure 1 As 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 (such as the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0036] The gNBs 102 provides wireless broadband access to the network 130 for a first plurality of user equipment devices (UEs) within a coverage area 120 of the gNB 102. The first plurality of UEs includes a UE 111, which can be located in a small business; a UE 112, which can be located in a large business; a UE 113, which can be a WiFi hotspot; a UE 114, which can be located in a first residence; a UE 115, which can be located in a second residence; and a UE 116, which can be a mobile device, such as a cell phone, a wireless laptop, a wireless PDA, or the like. The gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within a coverage area 125 of the gNB 103. The second plurality of UEs includes the UE 115 and the UE 116. In some embodiments, one or more of the gNBs 101-103 can communicate with each other and with the UEs 111-116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication techniques.

[0037] Depending on the network type, the term "base station" or "BS" can refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmit point (TP), transmit-receive point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macrocell, a femtocell, a WiFi access point (AP), or other wireless-enabled devices. Base stations can provide wireless access in accordance with 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 the sake of convenience, the terms "BS" and "TRP" can be used interchangeably herein to refer to a network infrastructure component that provides wireless access to remote terminals. Further, depending on the network type, the term "user equipment" or "UE" can refer to any component, such as a "mobile station," "subscriber station," "remote terminal," "wireless terminal," "receive point," or "user device." For the sake of convenience, the terms "user equipment" and "UE" are used interchangeably herein to refer to a remote wireless device that wirelessly accesses an access BS, whether the UE is a mobile device (such as a mobile telephone or smartphone) or is normally considered a fixed device (such as a desktop computer or vending machine).

[0038] Dotted lines show the approximate extents of the coverage areas 120 and 125 as approximate circles only for purposes of illustration and explanation. It should be clearly understood that the coverage areas associated with gNBs, such as the coverage areas 120 and 125, can have other shapes that do not appear to be circular, including irregular shapes, depending upon the configuration of the gNBs and variations in the radio environment associated with natural and man-made obstructions.

[0039] As described in more detail below, one or more of the UEs 111-116 include circuitry, programming or a combination thereof, for transmission and reception in a full duplex system. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming or a combination thereof, to support transmission and reception in a full duplex system.

[0040] Although Figure 1 various changes can be made to Figure 1 the wireless network. For example, the wireless network can include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 could communicate directly with any number of UEs and provide those UEs access to the network 130. Similarly, each gNB 102-103 could communicate directly with the network 130 and provide UEs access to the network 130. Further, gNBs 101, 102, and / or 103 could provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0041] Figure 2 An example gNB 102 according to embodiments of the present disclosure is illustrated in FIG. 2. Figure 2 The embodiment of the gNB 102 illustrated in FIG. 2 is for illustration only and Figure 1 The gNBs 101 and 103 of FIG. 1 can have the same or similar configuration. However, gNBs have a wide variety of configurations depending on Figure 2 the scope of the present disclosure is limited to any particular implementation of a gNB.

[0042] As Figure 2 illustrated, gNB 102 includes multiple antennas 205a-205n, multiple transceivers 210a-210n, a controller / processor 225, memory 230, and a backhaul or network interface 235.

[0043] The transceiver 210a-210n receives, from the antenna 205a-205n, the incoming RF signals such as signals transmitted by UEs in the network 100. The transceiver 210a-210n down-converts the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by the controller / processor 225 and / or receive (RX) processing circuitry in the transceiver 210a-210n, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The controller / processor 225 can further process the baseband signals.

[0044] The controller / processor 225 and / or transmit (TX) processing circuitry in the transceiver 210a-210n receives analog or digital data, such as voice data, web data, e-mail, or interactive video game data from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The transceiver 210a-210n up-converts the baseband or IF signals to RF signals by frequency modulating a carrier signal that is at or near a resonant frequency of the antenna 205a-205n. The RF signals are transmitted via the antenna 205a-205n.

[0045] The controller / processor 225 can include one or more processors or other processing devices to manage the overall operation of the gNB 102. For example, the controller / processor 225 can control the reception of

[0046] The controller / processor 225 is also capable of executing programs and other processes resident in the memory 230, such as processes to support transmission and reception in a full-duplex system. The controller / processor 225 can move data into or out of memory 230 as required by the processes executing on the controller / processor 225.

[0047] 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 over a network. Interface 235 can support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), interface 235 can 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, interface 235 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. Interface 235 includes any suitable architecture supporting communication via a wired or wireless connection, such as Ethernet or a transceiver.

[0048] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, and other portions of memory 230 may include flash memory or other ROM.

[0049] although Figure 2 An example of gNB 102 is shown, but it is possible to compare it with other models. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2 Each component shown. Furthermore, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0050] Figure 3 An example UE 116 according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 This disclosure is not intended to limit the scope of any particular implementation of the UE.

[0051] like Figure 3 As 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 350, a display 355, and memory 360. Memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0052] The transceiver 310 receives, from the antenna 305, incoming RF signals transmitted by gNBs of the network 100. The transceiver 310 down-converts the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are processed by the transceiver 310 and / or the RX processing circuitry in the processor 340, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry transmits the processed baseband signals to the speaker 330 (such as for voice data) or to the processor 340 (such as for web browsing data).

[0053] The transceiver 310 and / or TX processing circuitry in the processor 340 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, e-mail, or interactive video game data) from the processor 340. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The transceiver 310 up-converts the baseband or IF signals to RF signals that are transmitted via the antenna 305.

[0054] The processor 340 can include one or more processors or other processing devices and execute instructions stored in memory 360 to control the overall operation of the UE 116. For example, the processor 340 can control the reception of DL channel signals and the transmission of UL channel signals by the transceiver 310, according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0055] The processor 340 is also capable of executing other processes and programs stored in memory 360, such as processes for transmitting and receiving in a full duplex system.

[0056] The processor 340 can move data into or out of memory 360 as required by the processes executed by the processor 340. In some embodiments, the processor 340 is configured to execute the applications 362 based on the OS 361 or in response to signals received from gNBs or an operator. The processor 340 is further coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0057] The processor 340 is also coupled to the input 350 and the display 355, which includes, for example, a touchscreen, a keypad, etc. The operator of the UE 116 can use the input 350 to enter data into the UE 116. The display 355 can be a liquid crystal display, a light emitting diode display, or other display capable of rendering text and / or at least limited graphics, such as from web sites.

[0058] The memory 360 is coupled to the processor 340. A portion of the memory 360 may include random access memory (RAM), and other portions of the memory 360 may include flash memory or other read-only memory (ROM).

[0059] although Figure 3 An example of UE 116 is shown, but it is possible to modify it. Figure 3 Make various changes. For example, Figure 3 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 340 can 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, transceiver 310 can include any number of transceivers and signal processing chains and can be connected to any number of antennas. Furthermore, although... Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0060] Figure 4 and Figure 5 Example wireless transmit and receive paths according to this disclosure are illustrated. In the following description, transmit path 400 may be described as being implemented in a gNB (such as gNB 102), and receive path 500 may be described as being implemented in a UE (such as UE 116). However, it is understood that receive path 500 may be implemented in the gNB, and transmit path 400 may be implemented in the UE. In some embodiments, in a full-duplex system, transmit path 400 is configured to support transmit, and receive path 500 is configured to support receive.

[0061] like Figure 4 The transmission path 400 shown includes a channel coding and modulation block 405, a serial-to-parallel (S to P) block 410, an N-size inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P to S) block 420, a cyclic prefix addition block 425, and an up-converter (UC) 430. For example... Figure 5 The receiver path 500 shown includes a downconverter (DC) 555, a cyclic prefix removal block 560, a serial-to-parallel (S-to-P) block 565, a fast Fourier transform (FFT) block of size N, a parallel-to-serial (P-to-S) block 575, and a channel decoding and demodulation block 580.

[0062] like Figure 4As shown, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as a low-density parity check (LDPC) coding), and modulates the input bits (such as with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols.

[0063] The serial-to-parallel block 410 converts (such as de-multiplexes) the serial modulated symbols to parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in the gNB 102 and the UE 116. The size N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate time-domain output signals. The parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from the size N IFFT block 415 to generate a serial time-domain signal. The add cyclic prefix block 425 inserts a cyclic prefix to the time-domain signal. The up-converter 430 modulates (such as up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before conversion to the RF frequency.

[0064] The transmitted RF signal from the gNB 102 arrives at the UE 116 after passing through the wireless channel and reverse operations to those performed at the gNB 102 are performed at the UE 116.

[0065] As Figure 5 shown, the down-converter 555 down-converts the received signal to baseband frequency and the remove cyclic prefix block 560 removes the cyclic prefix to generate a serial time-domain baseband signal. The serial-to-parallel block 565 converts the time-domain baseband signal to parallel time-domain signals. The size N FFT block 570 performs the FFT algorithm to generate N parallel frequency-domain signals. The parallel-to-serial block 575 converts the parallel frequency-domain signals to a sequence of modulated data symbols. The channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0066] Each of the gNBs 101-103 can implement a transmit path 400 similar to that shown in Figure 4 FIG. 4 for transmission in the downlink to UEs 111-116 and can implement a receive path 500 similar to that shown in Figure 5 FIG. 5 for reception in the uplink from UEs 111-116. Similarly, each of UEs 111-116 can implement a transmit path 400 for transmission in the uplink to gNBs 101-103 and can implement a receive path 500 for reception in the downlink from gNBs 101-103.

[0067] Figure 4 and Figure 5Each component in the system can be implemented using only hardware or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5 At least some components can be implemented in software, while others can be implemented using configurable hardware or a combination of software and configurable hardware. For example, FFT block 570 and IFFT block 415 can be implemented as configurable software algorithms, where the value of size N can be modified depending on the implementation method.

[0068] Furthermore, although described as using FFT and IFFT, this is merely illustrative and should not be construed as limiting the scope of this disclosure. Other types of transforms, such as the Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions, can be used. It will be understood that for the DFT and IDFT functions, the value of the variable N can be any integer (such as 1, 2, 3, 4, etc.), while for the FFT and IFFT functions, the value of the variable N can be any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0069] although Figure 4 and Figure 5 An example of a wireless transmit and receive path is shown, but it is possible to modify it further. Figure 4 and Figure 5 Make various changes. For example, you can combine, further subdivide, or omit. Figure 4 and Figure 5 It includes various components and allows for the addition of additional components as needed. Furthermore, Figure 1 and Figure 1 This is intended to illustrate examples of the types of send 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.

[0070] A communication system may include a downlink (DL) and an uplink (UL), where DL refers to the connection from the base station (e.g., such as...). Figure 1 (as shown in 101-103) or one or more transmission points to the UE (e.g., as shown in 101-103) Figure 1 The transmission shown in 111-116) refers to the transmission from the UE (e.g., as shown in 111-116). Figure 6 (as shown in 111-116) to the base station (e.g., as shown in 111-116) Figure 6 (as shown in 101-103) or transmission to one or more receiving points.

[0071] A time unit of DL signaling or UL signaling on a cell is referred to as a slot, and can include one or more symbols. A symbol can also be used as an additional time unit. A frequency or bandwidth (BW) unit is referred to as a resource block (RB). One RB includes a plurality of subcarriers (SCs). For example, a slot can have a duration of 1 millisecond or 0.5 milliseconds, include 14 symbols, and an RB can include 12 SCs with an inter-SC spacing of 15 kHz or 30 kHz, and so on.

[0072] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also known as pilot signals. A gNB transmits data information or DCI through a corresponding physical DL shared channel (PDSCH) or a physical DL control channel (PDCCH). A PDSCH or a PDCCH can be transmitted over a variable number of slot symbols including one slot symbol. For brevity, a DCI format scheduling a PDSCH reception by a UE is referred to as a DL DCI format, and a DCI format scheduling a physical uplink shared channel (PUSCH) transmission from a UE is referred to as a UL DCI format.

[0073] A DCI format scheduling a PDSCH reception or a PUSCH transmission for a single UE, such as a DCI format with CRC scrambled by C-RNTI / CS-RNTI / MCS-C-RNTI as described in 3GPP standard specifications, is referred to as a unicast DCI format. A DCI format scheduling a PDSCH reception for a multicast communication, such as a DCI format with CRC scrambled by G-RNTI / G-CS-RNTI as described in 3GPP standard specifications, is referred to as a multicast DCI format. A DCI format providing various control information to at least a subset of UEs in a serving cell, such as DCI format 2_0 in 3GPP standard specifications, is referred to as a group-common (GC) DCI format.

[0074] A gNB transmits one or more types of RS including channel state information RS (CSI-RS) and demodulation RS (DM-RS) among multiple types of RS. A CSI-RS is mainly used for a UE to perform measurements and provide channel state information (CSI) to a gNB. For channel measurements, a non-zero-power CSI-RS (NZP CSI-RS) resource is used. For interference measurement reporting (IMR), a CSI interference measurement (CSI-IM) resource associated with a zero-power CSI-RS (ZP CSI-RS) configuration is used. A CSI process includes a NZP CSI-RS and a CSI-IM resource.

[0075] The UE can determine the CSI-RS transmission parameters through DL control signaling or higher layer signaling, such as radio resource control (RRC) signaling from a gNB, such as the BS 102. The transmission instances of the CSI-RS can be indicated by the DL control signaling or configured by the higher layer signaling. The DM-RS is transmitted only in the BW of the corresponding PDCCH or PDSCH, and the UE can use the DM-RS to demodulate the data or control information.

[0076] In some implementations, the UL signals also include data signals conveying information content, control signals conveying UL control information (UCI), DM-RS associated with data or UCI demodulation, sounding RS (SRS) enabling the gNB to perform UL channel measurement, and RA preamble enabling the UE to perform RA (see also 3GPP standard specification NR specification). The UE transmits the data information or UCI through a corresponding PUSCH or physical UL control channel (PUCCH). The PUSCH or PUCCH can be transmitted over a variable number of slot symbols including one slot symbol. The gNB can configure the UE to transmit signals on the cell within an active UL bandwidth part (BWP) of the cell UL BW.

[0077] The UCI includes HARQ acknowledgement (ACK) information indicating correct or incorrect detection of data transport blocks (TBs) in the PDSCH, scheduling request (SR) indicating whether the UE has data in the buffer, and CSI report enabling the gNB to select appropriate parameters for PDSCH or PDCCH transmissions to the UE. The HARQ-ACK information can be configured to have a smaller granularity than per TB and can be per data code block (CB) or per group of data CBs, where a data TB includes multiple data CBs.

[0078] The CSI report from the UE can include a channel quality indicator (CQI) informing the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect data TBs at a predetermined block error rate (BLER), such as 10% BLER (see NR specification), a precoding matrix indicator (PMI) informing the gNB 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.

[0079] The UL RS includes DM-RS and SRS. The DM-RS is transmitted only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use the DM-RS to demodulate the information in the corresponding PUSCH or PUCCH. The SRS is transmitted by the UE to provide the gNB with the UL CSI, and for TDD systems, the SRS transmission can also provide the PMI for the DL transmission. In addition, for establishing synchronization or initial higher layer connection with the gNB, the UE can transmit a physical random access channel (PRACH as shown in the 3GPP NR standard specification).

[0080] An antenna port is defined such that the channel over which a symbol on the antenna port is transmitted can be inferred from the channel over which another symbol on the same antenna port is transmitted.

[0081] For DM-RS associated with PDSCH, the channel over which a PDSCH symbol on one antenna port is transmitted can be inferred from the channel over which a DM-RS symbol on the same antenna port is transmitted only when the PDSCH symbol and the DM-RS symbol on the same antenna port are within the same resources of the scheduled PDSCH, in the same slot, and in the same precoding resource block group (PRG).

[0082] For DM-RS associated with PDCCH, the channel over which a PDCCH symbol on one antenna port is transmitted can be inferred from the channel over which a DM-RS symbol on the same antenna port is transmitted only when the PDCCH symbol and the DM-RS symbol on the same antenna port are within the resources for which the UE can assume the same precoding is used.

[0083] For DM-RS associated with physical broadcast channel (PBCH), the channel over which a PBCH symbol on one antenna port is transmitted can be inferred from the channel over which a DM-RS symbol on the same antenna port is transmitted only when the PBCH symbol and the DM-RS symbol on the same antenna port are within the same slot and within a SS / PBCH block transmitted with the same block index.

[0084] Two antenna ports are said to be quasi co-located if the large scale properties of the channel over which a symbol on one antenna port is transmitted can be inferred from the channel over which a symbol on the other antenna port is transmitted. The large scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0085] A UE can assume that synchronization signal (SS) / PBCH blocks (also denoted as SSBs) transmitted with the same block index on the same center frequency location are quasi co-located with respect to Doppler spread, Doppler shift, average gain, average delay, delay spread, and (when applicable) spatial Rx parameters. For any other synchronization signal SS / PBCH block transmission, the UE can not assume quasi co-location.

[0086] Without a CSI-RS configuration, and unless otherwise configured, a UE can assume that PDSCH DM-RS and SSB are quasi co-located with respect to Doppler shift, Doppler spread, average delay, delay spread, and (when applicable) spatial Rx parameters. A UE can assume that PDSCH DM-RS within the same code division multiplexing (CDM) group are quasi co-located with respect to Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx. A UE can also assume that the DM-RS ports associated with a PDSCH are QCLed with QCL Type A, Type D (when applicable), and average gain. A UE can further assume that no DM-RS collides with SS / PBCH blocks.

[0087] A beam can be determined by a transmission configuration indication (TCI) state that establishes a quasi co-location (QCL) relationship or spatial relationship between a source reference signal (e.g., a synchronization signal block (SS / PBCH block or SSB) or a CSI-RS) and a target reference signal, or spatial relationship information that establishes an association with a source reference signal (such as an SSB, a CSI-RS, or an SRS). In either case, the ID of the source reference signal can identify the beam.

[0088] A TCI state and / or spatial relationship reference RS can determine a spatial Rx filter for reception of a downlink channel or signal at a UE, or a spatial Tx filter for transmission of an uplink channel or signal from a UE. A TCI state and / or spatial relationship reference RS can determine a spatial Tx filter for transmission of a downlink channel or signal from a gNB, or a spatial Rx filter for reception of an uplink channel or signal at a gNB.

[0089] A UE can be indicated a spatial setting for PDCCH reception based on configuration by higher layers of a value of a TCI state for a control resource set (CORESET) where the UE receives PDCCH. A UE can be indicated a spatial setting for PDSCH reception based on configuration by higher layers or based on an indication of a value of a TCI state by a DCI format scheduling PDSCH reception. A gNB can configure a UE to receive signals on a cell within a DL bandwidth part (BWP) of a cell DL BW.

[0090] A UE can be configured with a list of up to M TCI state configurations within the higher layer parameter PDSCH-Config to decode PDSCH according to a PDCCH with detection of DCI for the UE and a given serving cell, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI-State contains parameters for configuring a QCL relationship between one or two downlink reference signals and the DM-RS ports of PDSCH, the DM-RS ports of PDCCH, or the CSI-RS ports of a CSI-RS resource.

[0091] The QCL relationship can be configured by the higher layer parameter qcl-Type1 for the first DL RS and by qcl-Type2 for the second DL RS, if configured. For the case of two DL RSs, the QCL types can not be the same, whether the reference is to the same DL RS or different DL RSs. The quasi-co-location type corresponding to each DL RS can be given by the higher layer parameter qcl-Type in QCL-Info and can take one of the following values: QCL-TypeA: {Doppler shift, Doppler spread, average delay, delay spread}; QCL-TypeB: {Doppler shift, Doppler spread}; QCL-TypeC: {Doppler shift, average delay}; and QCL-TypeD: {spatial Rx parameter}.

[0092] A reference RS can correspond to a set of characteristics of a DL beam or a UL Tx beam, such as direction, precoding / beamforming, number of ports, etc.

[0093] A set of TCI states with N elements can be provided to a UE through higher layer RRC signaling. In one example, DL and joint TCI states are configured by the higher layer parameter DLorJoint-TCIState, where the number of DL and joint TCI states is N DJ . UL TCI states are configured by the higher layer parameter UL-TCIState, where the number of UL TCI states is N U . N = N DJ -N UA DL or Joint-TCIState can include a DL or Joint-TCIState of a serving cell. A source RS of a TCIState can be associated with a serving cell, e.g., a PCI of the serving cell. In addition, a DL or Joint-TCIState can be associated with a cell having a PCI different from a PCI of the serving cell, e.g., a source RS of a TCIState is associated with a cell having a PCI different from a PCI of the serving cell. A UL-TCIState can include a UL TCIState belonging to a serving cell, e.g., a source RS of a TCIState is associated with a serving cell (a PCI of the serving cell); in addition, a UL-TCIState can be associated with a cell having a PCI different from a PCI of the serving cell, e.g., a source RS of a TCIState is associated with a cell having a PCI different from a PCI of the serving cell.

[0094] MAC CE signaling can include a subset of M (M ≤ N) TCI States or TCI State codepoints in a set of N TCI States, where the codepoints are signaled in a “Transmission Configuration Indication” field of a DCI used to indicate a TCI State. A codepoint can include one TCI State, e.g., a DL TCI State or a UL TCI State or a Joint (DL and UL) TCI State. Alternatively, a codepoint can include two TCI States, e.g., a DL TCI State and a UL TCI State. L1 control signaling (i.e., downlink control information (DCI)) can update a TCI State of a UE, where the DCI includes a “Transmission Configuration Indication” (beam indication) field, e.g., using M bits, such that M ≤ 2 m A TCI State can correspond to a codepoint signaled by a MAC CE. A DCI used to indicate a TCI State can be a DCI format 1_1 or a DCI format 1_2 or a DCI format 1_3 with or without a DL assignment for PDSCH reception.

[0095] A TCI State can be associated with a SSB or a CSI-RS of a serving cell or a SSB or a CSI-RS associated with a PCI different from a PCI of the serving cell through a QCL relationship. A QCL relationship with a SSB can be a direct QCL relationship, where a (e.g., for a QCL Type-D relationship or a spatial relationship) source RS is a SSB. A QCL relationship with a SSB can be an indirect QCL relationship, where a (e.g., for a QCL Type-D relationship or a spatial relationship) source RS can be a CSI-RS and the CSI-RS has a SSB as its source (e.g., for a QCL Type-D relationship or a spatial relationship). An indirect QCL relationship with a SSB can involve a chain of more than one CSI-RS QCL or spatial relationship.

[0096] Rel. 14 LTE and Rel. 15 NR support up to 32 CSI-RS antenna ports, which enables eNBs to be equipped with a large number of antenna elements, such as 64 or 128. In this case, multiple antenna elements are mapped onto one CSI-RS port. For mmWave bands, 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 digitally precoded ports) tends to be limited due to hardware constraints, such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies, as Figure 6 illustrated.

[0097] Figure 7 An example antenna structure 600 is shown in accordance with embodiments of the present disclosure. Figure 7 The embodiment of the antenna structure 600 shown is for illustration only.

[0098] In this case, one CSI-RS port is mapped onto a large number of antenna elements that can be controlled by one set of analog phase shifters 601. One CSI-RS port can then correspond to one subarray that produces a narrow analog beam through analog beamforming 605. The analog beam can be configured to sweep across a wider angular range 620 by varying the phase shifter set 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, NCSI-PORT. A digital beamforming unit 610 performs a linear combination across the NCSI-PORT analog beams to further increase the precoding gain. While the analog beams are wideband (hence not frequency-selective), the digital precoding can also vary across frequency subbands or resource blocks. Receiver operations can be similarly envisioned.

[0099] Due to the aforementioned system utilizing 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 - performed from time to time), the term “multi-beam operation” is used to refer to the overall system aspects. This includes, for illustration purposes, indicating the assigned DL or UL TX beam (also referred to as “beam indication”), measuring at least one reference signal for computing and performing a beam report (also referred to as “beam measurement” and “beam report”, respectively), and receiving a DL or UL transmission via selection of a corresponding RX beam.

[0100] The aforementioned system is also applicable to high frequency bands, such as > 52.6 GHz. In this case, the system can employ analog beams only. Due to the O2 absorption loss around 60 GHz frequencies (additional loss at 100 meter distance is about 10 dB), a larger number and sharper analog beams (hence a larger number of radiators in the array) can be needed to compensate for the additional path loss.

[0101] For cellular system operation in the sub-1 GHz frequency range (e.g., less than 1 GHz), it is challenging to support a large number of CSI-RS antenna ports (e.g., 32) at a single location or remote radio head (RRH) or TRP, because a larger antenna form factor size is required at these frequencies compared to systems operating at high frequencies such as 2 GHz or 4 GHz. At such low frequencies, the maximum number of CSI-RS antenna ports that can be co-located at a single site (or TRP / RRH) can be limited, e.g., to 8. This limits the spectral efficiency of such systems. In particular, the MU-MIMO spatial multiplexing gain offered by a large number of CSI-RS antenna ports such as 32 cannot be realized.

[0102] One way to operate a sub-1 GHz system with a large number of CSI-RS antenna ports is to distribute the antenna ports across multiple locations (or TRP / RRH). The multiple sites or TRP / RRH can still be connected to a single (common) base unit, so signals transmitted / received via the multiple distributed TRP / RRH can still be processed at a centralized location. This is referred to as distributed MIMO or multi-TRP coherent joint transmission (C-JT).

[0103] In this disclosure, the frequency resolution (reporting granularity) and span (reporting bandwidth) of the CSI or calibration coefficient report can be defined in terms of frequency “subbands” and “CSI reporting bands” (CRBs), respectively.

[0104] A subband for CSI or calibration coefficient reporting is defined as a set of contiguous PRBs representing the smallest frequency unit for CSI or calibration coefficient reporting. The number of PRBs in a subband can be fixed for a given DL system bandwidth value, or can be 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 subband can be included in the CSI or calibration coefficient reporting settings. The term “CSI reporting band” is defined as a set / collection of contiguous or non-contiguous subbands in which the CSI or calibration coefficient reporting is performed.

[0105] For example, a CSI or calibration coefficient reporting band can include all subbands within the DL system bandwidth. This can also be referred to as “full band”. Alternatively, a CSI or calibration coefficient reporting band can include only a set of subbands within the DL system bandwidth. This can also be referred to as “partial band”. The term “CSI reporting band” is used as an example of a terminology to represent the functionality. Other terminologies such as “set of CSI reporting subbands” or “CSI or calibration coefficient reporting bandwidth” can also be used.

[0106] For UE configuration, a UE can be configured with at least one CSI or calibration coefficient reporting band. The configuration can be semi-static (via higher layer signaling or RRC) or dynamic (via MAC CE or L1 DL control signaling). When configured with multiple (N) CSI or calibration coefficient reporting bands (e.g., via RRC signaling), a UE can report CSI associated with n ≤ N CSI reporting bands. For example, a large system bandwidth of > 6 GHz can require multiple CSI or calibration coefficient reporting bands. The value of n can be semi-statically (via higher layer signaling or RRC) or dynamically (via MAC CE or L1 DL control signaling) configured. Alternatively, a UE can report a recommended value of n via an UL channel.

[0107] Therefore, the CSI parameter frequency granularity can be defined per CSI reporting band as follows. When one CSI parameter is used for all Mn subbands within a CSI reporting band, the CSI parameter is configured with “single” reporting for a CSI reporting band with Mn subbands. When one CSI parameter is reported for each of the Mn subbands within a CSI reporting band, the CSI parameter is configured with “subband” for a CSI reporting band with Mn subbands.

[0108] In some embodiments, 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 allocation by country. TDD is required in most bands above 2.5 GHz.

[0109] Figure 7 An example of a structure 700 of a slot for a TDD communication system is shown in accordance with an embodiment of the present disclosure. Figure 8 The embodiment of the structure 700 of a slot for a TDD communication system shown is for illustration only.

[0110] The DDDSU UL-DL configuration is shown in Figure 8 Here, D denotes a DL slot, U denotes a UL slot, and S denotes a special or switching slot with a DL part, a flexible part that can also be used as a guard period G for DL to UL switching, and optionally a UL part.

[0111] TDD has many advantages compared to FDD. For example, in the TDD case, using the same frequency band for DL and UL transmissions leads to simpler UE implementation since no duplexer is needed. Another advantage is that time resources can be flexibly assigned to UL and DL taking into account the asymmetric ratio of traffic in both directions. DL is typically assigned most of the time resources in TDD to handle DL-heavy mobile traffic. Another advantage is that CSI can be more easily acquired via channel reciprocity. This reduces the overhead associated with CSI reporting, especially when there are a large number of antennas.

[0112] Despite the advantages of TDD over FDD, there are also disadvantages. The first disadvantage is that TDD has smaller coverage since a smaller fraction of time resources are available for transmissions from UEs, while in the FDD case, all time resources can be used. Another disadvantage is latency. In TDD, the timing gap between reception by a UE and transmission by the UE (including HARQ-ACK information associated with reception by the UE) is typically larger than in FDD, e.g., by several milliseconds. Thus, the HARQ round trip time in TDD is typically longer than in the FDD case, especially when the DL traffic load is high. This leads to increased UL user plane latency in TDD and can result in data throughput loss or even HARQ stalling when the PUCCH providing HARQ-ACK information needs to be repeatedly transmitted in order to improve coverage (an alternative in this case is for the network to drop HARQ-ACK information at least for some transport blocks in DL).

[0113] To address some of the disadvantages of TDD operation, adaptive link direction based on physical layer signaling using DCI format is supported, where, in addition to some symbols in some slots that support predetermined transmissions such as SSB, the symbols of a slot can have flexible direction (UL or DL) that the UE can determine according to the scheduling information for transmission or reception. PDCCH can also be used to provide DCI format, such as DCI format 2_0 described in 3GPP standard specification, which can indicate the link direction of some flexible symbols in one or more slots. However, in a practical deployment, it is difficult for a gNB scheduler to adapt the transmission direction of symbols without coordination with other gNB schedulers in the network. This is due to CLI, where, for example, DL reception by a UE in a cell can experience large interference from UL transmissions by other UEs in the same or neighboring cells.

[0114] Full-duplex (FD) communication offers potential for increased spectral efficiency, improved capacity, and reduced latency in wireless networks. When using FD communication, UL and DL signals are simultaneously received and transmitted on fully or partially overlapping or adjacent frequency resources, improving spectral efficiency and reducing latency in the user and / or control plane.

[0115] 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 resource, such as a symbol or a time slot. Transmission and reception on the same symbol or time slot can be separated in frequency, for example, by being placed 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 location of the carrier. The allocation of DL and UL subbands can also be partially or even fully overlapping.

[0116] A gNB can use the same physical antenna, antenna port, antenna panel, and transmitter-receiver unit (TRX) for simultaneous transmission and reception in a time-domain resource. Transmission and reception in FD can also occur using separate physical antennas, ports, panels, or TRXs. When FD communication is enabled, antennas, ports, panels, or TRXs can also be partially reused, or only a respective subset can be active for transmission and reception.

[0117] When a UE receives a signal / channel from a gNB in a full-duplex slot, the reception can be scheduled in a DL subband of the full-duplex slot. There can be one or more, such as two, DL subbands in a full-duplex slot when full-duplex operation at the gNB uses the DL slot for scheduling transmissions of UEs using full-duplex transmission and reception at the gNB. When a UE is scheduled to transmit in a full-duplex slot, the transmission can be scheduled in a UL subband of the full-duplex slot. There can be one or more, such as two, UL subbands in a full-duplex slot when full-duplex operation at the gNB uses the UL slot for scheduling transmissions to UEs using full-duplex transmission and reception at the gNB. Full-duplex operation using a UL or DL subband can be referred to as subband full-duplex (SBFD).

[0118] For example, when full duplex operation at the gNB uses a DL or F time slot or symbol for scheduling transmissions from UEs using full duplex transmission and reception at the gNB, there can be one DL subband and one UL subband on a full duplex time slot or symbol in the NR carrier. The frequency domain configuration of the DL and UL subbands can then be referred to as “DU” or “UD”, respectively, depending on whether the UL subband is configured / indicated in the upper or lower part of the NR carrier. In another example, when full duplex operation at the gNB uses a DL or F time slot or symbol for scheduling transmissions from UEs using full duplex transmission and reception at the gNB, there can be two DL subbands and one UL subband on a full duplex time slot or symbol. The frequency domain configuration of the DL and UL subbands can then be referred to as “DUD” when, respectively, the UL subband is configured / indicated in the part of the NR carrier and the DL subbands are configured / indicated at the edges of the NR carrier.

[0119] Hereinafter, for brevity, full duplex time slots / symbols and SBFD time slots / symbols can be jointly 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.

[0120] Instead of using a single carrier, different component carriers (CCs) can also be used for reception and transmission of the UE. For example, reception of the UE can occur on a first CC and transmission of the UE occurs on a second CC having a small (including zero) frequency separation from the first CC. For example, when using full duplex operation based on carrier aggregation, SBFD subbands can correspond to a component carrier or a portion of a component carrier, or SBFD subbands can be allocated using portions of multiple component carriers.

[0121] In one example, a gNB can support full duplex operation, e.g., support simultaneous DL transmission to a UE in a SBFD DL subband and UL reception from the UE in a SBFD UL subband on a SBFD time slot or symbol. In one example, the gNB side can support full duplex operation using multiple TRPs, e.g., on a SBFD time slot or symbol, TRP A can be used for simultaneous DL transmission to the UE and TRP B can be used for UL reception from the UE.

[0122] A half duplex UE or a full duplex UE can support full duplex operation. A UE operating in half duplex mode can transmit or receive, but not both simultaneously on the same symbol. A UE operating in full duplex mode can transmit and receive simultaneously on the same symbol. For example, a UE can operate in full duplex mode on a single NR carrier or based on the use of intra- or inter-band carrier aggregation.

[0123] For example, when a UE is capable of full duplex operation, the UE can support SBFD operation based on overlapping or non-overlapping subbands or using one or more UE antenna panels. In one example, a FR2-1 UE can support simultaneous transmission to and reception from a gNB on the same time domain resources (e.g., symbols or slots). A UE capable of full duplex operation can then be configured, scheduled, assigned, or instructed to have DL reception from the gNB in a SBFD DL subband on the same SBFD symbol on which the UE is configured, scheduled, assigned, or instructed to have UL transmission to the gNB on a SBFD UL subband. In one example, the UE’s DL reception can use a first UE antenna panel, while the UL transmission from the UE can use a second UE antenna panel on the same SBFD symbol / slot. For example, UE-side self-interference cancellation capability can be supported in the UE through one or a combination of techniques as described in the gNB case, e.g., based on spatial isolation provided by the UE antenna or UE antenna panel, or based on analog and / or digital equalization, or filtering. In one example, the UE’s DL reception in a first frequency channel, band, or frequency range can use a TRX of the UE antenna or UE antenna panel, while the UE’s UL transmission in a second frequency channel, band, or frequency range can use the TRX on the same SBFD symbol / slot. For example, when a UE is capable of full duplex operation based on the use of carrier aggregation, simultaneous DL reception from and UL transmission to the gNB on the same symbol can occur on different component carriers.

[0124] Hereinafter, for brevity, a UE operating in half duplex mode but supporting various enhancements for gNB-side full duplex operation can be referred to as a SBFD-aware UE. For example, when operating on a serving cell with gNB-side SBFD support, a SBFD-aware UE can support time or frequency domain resource allocation enhancements to improve UL coverage or throughput or spectral efficiency.

[0125] Hereinafter, for brevity, a UE operating in full duplex mode can be referred to as a SBFD-capable UE, or as a full duplex-capable UE, or as a full duplex UE. A full duplex UE can support various enhancements for gNB-side full duplex operation. For example, when operating on a serving cell, a SBFD-capable UE can support time or frequency domain resource allocation enhancements to improve UL coverage or throughput or spectral efficiency.

[0126] In one example, the gNB can operate in full duplex (or SBFD) mode and the UE operates in half duplex mode. In one example, the gNB can operate in full duplex (or SBFD) mode and the UE operates in full duplex (or SBFD) mode. In one example, the gNB side of full duplex (or SBFD) operation supports based on multiple TRPs, where the TRPs can operate in half duplex mode and the UE operates in full duplex mode.

[0127] In one example, a 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. UE1 can transmit and receive simultaneously in a time slot or symbol when configured, scheduled, assigned, or instructed by the gNB. UE2 can transmit or receive in a time slot or symbol, while simultaneous UE2 DL reception and UE2 UL transmission cannot occur on the same time slot or symbol.

[0128] FD transmission / reception is not limited to gNB, TRP, or UE, but can also be used for other types of wireless nodes, such as relay or repeater nodes.

[0129] Embodiments of the present invention recognize that full duplex operation requires overcoming several challenges in order to work in practical deployments. When using overlapping frequency resources, the received signal is subject to co-channel CLI and self-interference. CLI and self-interference cancellation methods include passive methods relying on isolation between transmit and receive antennas, active methods utilizing RF or digital signal processing, and hybrid methods using a combination of active and passive methods. Filtering and interference cancellation can be implemented in RF, baseband (BB), or both RF and BB. While mitigating co-channel CLI can require significant complexity at the receiver, it is feasible within current technology limitations. Another aspect of FD operation is mitigating adjacent channel CLI, as in several cellular band allocations, different operators have adjacent spectrum.

[0130] Throughout this disclosure, the term FD is used as an abbreviated form of full duplex operation in wireless systems. The terms “cross-division-duplex” (XDD), “full duplex,” and “sub-band full duplex” can be used interchangeably in this disclosure.

[0131] FD operation in NR can improve spectral efficiency, link robustness, capacity, and latency of UL transmissions. In NR TDD systems, the UE’s transmissions are limited by fewer available transmission opportunities than the UE’s receptions. For example, for NR TDD with SCS = 30 kHz, DDDU (2 ms), DDDSU (2.5 ms), or DDDDDDDSUU (5 ms), the UL-DL configurations allow DL:UL ratios from 3:1 to 4:1. Any transmissions by the UE can only occur in a limited number of UL slots, e.g., every 2, 2.5, or 5 ms, respectively.

[0132] Figure 9 An example of an FDD configuration 800 is shown in accordance with embodiments of the disclosure. Figure 1 The embodiments of the FDD configuration 800 shown in FIG. 8 are for illustration only.

[0133] For a single carrier TDD configuration that enables FD, a slot denoted as X is an FD slot. Both DL and UL transmissions can be scheduled in the FD slot for at least one or more symbols. The term FD slot is used to refer to a slot in which a UE can simultaneously receive and transmit in at least one or more symbols of the slot if the base station schedules or assigns the radio resources. A half-duplex UE cannot simultaneously transmit and receive in the FD slot or on the symbols of the FD slot. When a half-duplex UE is configured for transmission in a symbol of the FD slot, another UE can be configured for reception in the symbol of the FD slot. An FD UE can simultaneously transmit and receive in a symbol of the FD slot, possibly with other UEs having resources for reception or transmission in the symbol of the FD slot. The transmissions of the UEs in a first FD slot can use the same or different frequency domain resources as in a second FD slot, where the resources can differ in terms of bandwidth, first RB, or location of the center carrier.

[0134] When a UE receives signals / channels from a gNB in a full-duplex slot, the reception can be scheduled in a DL subband of the full-duplex slot. There can be one or more (such as two) DL subbands in a full-duplex slot when full-duplex operation at the gNB 102 uses the DL slot for scheduling transmissions of the UE 116 using full-duplex transmission and reception at the gNB 102. When a UE is scheduled to transmit in a full-duplex slot, the transmission can be scheduled in a UL subband of the full-duplex slot. There can be one or more (such as two) UL subbands in a full-duplex slot when full-duplex operation at the gNB 102 uses the UL slot for scheduling transmissions to the UE for the purpose of using full-duplex transmission and reception at the gNB 102. Full-duplex operation using a UL subband or a DL subband can be referred to as subband full-duplex (SBFD).

[0135] For a carrier aggregation TDD configuration with FD enabled, the UE receives in a time slot on CC#1 and transmits in at least one or more symbols of the time slot on CC#2. FD time slots that involve both gNB or UE transmission / reception occurring on the same time domain resources (such as time slots or symbols) are marked with an X, except for the D time slot (used only for gNB transmission / UE reception), the U time slot (used only for gNB reception / UE transmission), and the S time slot (used for both gNB / UE transmission and reception and also supports DL-UL handover). For an example of TDD with SCS=30kHz, single carrier, and UL-DL allocation DXXSU (2.5 ms), the second and third time slots allow FD operation.

[0136] UE transmissions can also occur in the last time slot (U) where the full UL transmission bandwidth is available. FD time slot or symbol assignment over a time period / multiple time slots can be indicated by the DCI format in the PDCCH reception, and then can vary by unit for each time period, or can be indicated by higher-layer signaling, such as via MAC CE or RRC.

[0137] Rel-15 NR focuses on single-TRP-based transmission / reception with ideal backhaul from the UE's perspective.

[0138] Using Rel-16 NR, in multi-transmit / receive point (multi-TRP or mTRP) operation, the serving cell can schedule the UE from two TRPs, thereby providing better coverage, reliability, and / or data rate for PDSCH, PDCCH, PUSCH, and PUCCH. Two different operating modes exist for scheduling multi-TRP PDSCH transmissions: single DCI (or sDCI) and multi-DCI (or mDCI). For both modes, control of UL and DL operations can be performed by the physical layer and MAC within the configuration provided by the RRC. In single-DCI mode, the UE is scheduled by the same DCI for receiving from or transmitting to two TRPs. In multi-DCI mode, the UE is scheduled by a separate DCI from each TRP. For example, to improve DL data rate, both single-DCI and multi-DCI-based noncoherent joint transmission (NCJT) can be supported.

[0139] Referring to procedures according to Rel-16 NR, for multi-DCI based NCJT transmission, up to 4 transmission layers per PDSCH, a UE can expect to receive two PDCCHs scheduling two PDSCHs that are fully / partially / non-overlapped in time and frequency domain respectively, with same / different PDSCH scrambling IDs. When a UE is scheduled with fully or partially overlapped PDSCHs, the UE is not expected to assume DM-RS ports in the CDM group indicated by two TCI states. From the UE perspective, some configurations related to both received PDSCHs (e.g., active BWP, etc.) are expected to be the same. The UE can be expected to rate match around the configured CRS pattern associated with the value of CORESETPoolIndex (i.e., per-TRP based) and applied to the corresponding PDSCH.

[0140] For PDCCH monitoring, two TRPs are implicitly associated with two CORESET groups respectively (i.e., up to 3 CORESETs per TRP), each of which can be identified by the value of CORESETPoolIndex. For both TRPs, the maximum number of non-overlapped CCE / BD for scheduling a cell can be doubled, but the maximum number of non-overlapped CCE / BD per TRP remains the same as in Rel. 15 NR.

[0141] Considering different backhaul conditions between two TRPs, the scheduling timeline can be relaxed to support out-of-order PDCCH-to-PDSCH, PDSCH-to-HARQ-ACK, and PDCCH-to-PUSCH according to UE capability. Both intra-slot separate HARQ-ACK (per-TRP based) and joint HARQ-ACK feedback (across two TRPs) can be supported and as specified by 3GPP standard specification for Type 1 and Type 2 HARQ-ACK codebooks in order to facilitate different backhaul conditions. The maximum number of active TCI states in a serving cell can be doubled by independent activation from two TRPs, but the maximum number of active TCI states per TRP remains the same as in Rel. 15 NR.

[0142] For example, the following transmission schemes are supported by single-DCI and configured by higher layer signaling.

[0143] In one example of “FDMSchemeA”, when two TCI states (i.e., two TRPs) are indicated in DCI and the UE is set to “FDMSchemeA”, the UE receives a single PDSCH transmission occasion of a TB, where each TCI state is associated with a non-overlapped frequency domain resource allocation in a comb-like PRG allocation (or half / half for wideband).

[0144] In another example of “FDMSchemeB”, when two TCI states (i.e., two TRPs) are indicated in DCI and the UE is set to “FDMSchemeB”, the UE receives two PDSCH transmission occasions of the same TB, where each TCI state is associated with a non-overlapping frequency domain resource allocation in a comb-like PRG allocation (or one-half / one-half for wideband).

[0145] In yet another example of “TDMSchemeA” (intra-slot), when two TCI states are indicated in DCI and the UE is set to “TDMSchemeA”, the UE receives two PDSCH transmission occasions of the same TB, where each TCI state is associated with one PDSCH transmission occasion that has non-overlapping time domain resource allocation with respect to the other PDSCH transmission occasion. Two PDSCH transmission occasions with mapping type B, corresponding to two TRPs respectively, are received within a given slot with symbol level gap configured by StartingSymbolOffsetK.

[0146] In yet another example of “repetitionNumber-r16” (inter-slot), when the UE is configured by the higher layer parameter repetitionNumber-r16 in PDSCH-TimeDomainResourceAllocation-r16, the UE can expect to be indicated with one or two TCI states in the codepoint of the TCI field. When two TCI states are indicated in DCI, the UE can expect to receive multiple slot-level PDSCH transmission occasions of the same TB, where two TCI states are associated with repetitionNumber-r16 consecutive slots (up to 16). Each PDSCH transmission occasion is expected to have the same SLIV. For a given TCI state mapping pattern, the UE can be configured with cyclicMappingsequentialMapping(or sequentialMapping).

[0147] For the above transmission schemes targeting on reliability improvement, each PDSCH transmission occasion is limited to up to two transmission layers, and the indicated DMRS ports are expected to be within one CDM group. The redundancy version of the PDSCH transmission occasion associated with the second TCI state is shifted by sequenceOffsetforRV-r16 (if applicable) with respect to the value of rv s .

[0148] In addition, in the case of single-DCI and multi-DCI based multi-TRP / panel transmission, the default beam assumption for FR2 is specified for receiving PDSCH, CSI-RS and PDCCH / PDSCH overlap.

[0149] Referring to procedures according to Rel-16 NR, for single-DCI based NCJT transmission, up to 8 transmission layers, each TCI codepoint can correspond to one or two TCI states activated by MAC-CE (also corresponding to 2-port PTRS if applicable). When the DCI indicates 2 TCI states, the first TCI state corresponds to the CDM group of the first antenna port indicated by the AntennaPortIndex table, e.g., the first TRP, and the second TCI state corresponds to the other CDM group, e.g., the second TRP. Additional new DMRS entries {0, 2, 3} with two CDM groups without data are supported to improve the flexibility of NCJT based scheduling.

[0150] For example, a UE can be provided with a higher layer parameter simultaneousTCI-UpdateListl or simultaneousTCI-UpdateList2 based on RRC signaling IE such as CellGroupConfig and / or based on RRC message such as RRCReconfiguration. Then, the higher layer parameter simultaneousTCI-UpdateListl or simultaneousTCI-UpdateList2 can provide the UE with a list of serving cells for which the TCI relationship can be simultaneously updated with MAC CE. For example, simultaneousTCI-UpdateListl and simultaneousTCI-UpdateList2 can not contain the same serving cells. For example, a UE can not expect the network to configure a serving cell configured with BWPs having two different values of CORESETPoolIndex in these lists.

[0151] For example, the network can activate and deactivate the configured TCI states of the PDSCH of a serving cell or a set of serving cells configured in simultaneousTCI-UpdateListl or simultaneousTCI-UpdateList2 by sending a TCI state activation / deactivation MAC CE for UE-specific PDSCH. The network can activate and deactivate the configured TCI states of the codepoints of the DCI transmission configuration indication field of the PDSCH of a serving cell by sending an enhanced TCI state activation / deactivation MAC CE for UE-specific PDSCH. The configured TCI states of the PDSCH can be initially deactivated at configuration time and after switching. For example, the network can indicate the TCI states of the PDCCH reception of the CORESET of a serving cell or a set of serving cells configured in simultaneousTCI-UpdateListl or simultaneousTCI-UpdateList2 by sending a TCI state indication MAC CE for UE-specific PDCCH.

[0152] For example, the UE can receive an activation command based on a MAC CE that maps at least one codepoint of the DCI field "transmission configuration indication" to two TCI states, e.g., one TCI state for TRP A and one TCI state for TRP B, respectively. For example, when one or two TCI states are indicated in the codepoint of the DCI TCI field, the UE determines the antenna port mapping for the PDSCH reception as specified in the 3GPP standard specification. For example, when the UE is provided by simultaneousTCI-UpdateListl or simultaneousTCI-UpdateList2 up to two lists of cells for simultaneous TCI state activation, the UE can apply the antenna port QCL provided by the parameter TCI-State with the same activated tci-StateID value to all configured DL BWPs with indexed CORESETs in all configured cells in the list determined by the serving cell index provided by the MAC CE command.

[0153] For example, when the UE is configured by the higher layer parameter repetitionScheme set to one of “fdmSchemeA”, “fdmSchemeB”, “tdmSchemeA”, or when the UE is configured by the higher layer parameter repetitionNumber in the parameter PDSCH-TimeDomainResourceAllocation, if the UE is indicated with two TCI states in the codepoint of the DCI field “Transmission Configuration Indication” and with DM-RS ports within one CDM group in the DCI field “Antenna Ports”, the UE further determines the PDSCH reception as specified in the 3GPP standard specification.

[0154] With Rel-17 NR, there are two different modes of operation for multi-TRP PDCCH: PDCCH repetition and SFN-based PDCCH transmission. In both modes, the UE can receive two PDCCH transmissions, one per TRP, carrying the same DCI. In the PDCCH repetition mode, the UE can receive two PDCCH transmissions carrying the same DCI from two linked search space sets each associated with a different CORESET. In the SFN-based PDCCH transmission mode, the UE can receive two PDCCH transmissions carrying the same DCI from a single search space set / CORESET using different TCI states.

[0155] For multi-TRP PUSCH repetition, the UE performs the PUSCH transmission of the same content with corresponding beam directions associated with different spatial relations towards two TRPs according to the indication in a single DCI or by the indication in a configured grant provided by RRC semi-statically. For multi-TRP PUCCH repetition, the UE performs the PUCCH transmission of the same content with corresponding beam directions associated with different spatial relations towards two TRPs. For inter-cell multi-TRP operation, for multi-DCI PDSCH transmission, one or more TCI states can be associated with SSBs with PCIs different from the serving cell PCI. An activated TCI state can be associated with at most one PCI different from the serving cell PCI at a time.

[0156] PDCCH repetition is defined by explicit linking between two search space sets with reference to procedures according to Rel-17 NR. The two linked search space sets can be associated with corresponding CORESETs with different TCI states, enabling beam diversity for PDCCH transmission. In Rel-17 NR, only intra-slot PDCCH repetition is supported, and PDCCH repetition is also only supported for USS or Type3 CSS (Type 3 CSS). Furthermore, the linking is specified at the PDCCH candidate level by restricting the configuration of the two linked search space sets, resulting in a one-to-one mapping between monitoring occasions and PDCCH candidates of the two linked search space sets. The two linked PDCCH candidates have the same aggregation level, the same number of coded bits, and the same DCI payload. To avoid ambiguity at the UE, a reference PDCCH candidate is defined for various procedures, such as timeline, PUCCH resource determination, PDSCH reception with mapping type B or mapping type A, determination of QCL assumption for PDSCH when TCI field is not present in DCI, etc.

[0157] The UE can report whether the UE needs to perform two or three decoding operations for the DCI format provided by the two linked PDCCH candidates. In the case of three decoding operations, the overbooking for PDCCH reception / DCI decoding is enhanced accordingly. Furthermore, determination of two QCL-TypeD is specified for FR2 to support time-overlapping PDCCH repetition. By linking two search space sets in both the scheduling cell and the scheduled cell, PDCCH repetition is also supported for cross-carrier scheduling.

[0158] To support multi-TRP PUCCH repetition, up to two sets of power control parameters in FR1, or up to two PUCCH-SpatialRelationlnfo in FR2, can be activated per PUCCH resource or per PUCCH resource group via MAC-CE. In addition, for all PUCCH formats, multi-TRP PUCCH repetition can be configured by intra-slot PUCCH repetition and inter-slot PUCCH repetition. Based on the set of power control parameters or the number of activated PUCCH-SpatialRelationlnfo for the scheduled PUCCH resource, DCI-based dynamic switching between single-TRP PUCCH repetition and multi-TRP PUCCH repetition can be supported. Separate power control for multi-TRP PUCCH repetition is supported by two activated PUCCH-SpatialRelationlnfo or two activated sets of power control parameters. Furthermore, up to two TPC fields in DCI can be supported for PUCCH transmission, and each TPC field is applied to each corresponding index of closed-loop power control state.

[0159] To support multi-TRP PUSCH repetition, up to two SRS resource sets with usage set to “codebook” or “non-codebook” can be supported. If a UE is provided two SRS resource sets with usage set to “codebook” or “non-codebook”, for PUSCH transmission scheduled by DCI, the second SRI field, the second TPMI field (if CB-based PUSCH is supported), and the second PTRS-DMRS association field are indicated by DCI format 0_1 or 0_2 for the PUSCH transmission occasion towards the TRP related to the second SRS resource set with usage set to “codebook” or “non-codebook”. In addition, the DCI field with 2 bits defined as “SRS resource set indicator” supports switching between single-TRP PUSCH repetition (corresponding to codepoints “00” and “01”) and multi-TRP PUSCH repetition (corresponding to codepoints “10” and “11”).

[0160] Separate power control for multi-TRP PUSCH repetition is supported by linking two SRI fields with two sets of power control parameters via higher layers. Up to two TPC fields for PUSCH transmission can be supported, and each TPC field is applied to a corresponding index of closed-loop power control state. Multi-TRP PUSCH repetition is also supported for configured grant Type 1 and 2.

[0161] In Rel-17 NR, multi-TRP PDSCH reception is extended to inter-cell operation. A UE can be configured with SSBs associated with a PCI that is different from the serving cell PCI and is referred to as an additional PCI. Up to 7 different additional PCIs can be configured to a UE and for inter-cell multi-TRP operation, only one is activated at a given time. An additional PCI can be associated with one or more TCI states and a gNB can schedule PDSCH from either TRP by indicating a TCI state via a field in the DCI.

[0162] To support HST-SFN operation, Rel-17 NR provides two methods for frequency offset compensation: (a) UE-based and (b) TRP-based. For UE-based compensation (Scheme A), a UE receives additional reference signals, e.g., TRS, from the TRPs in a non-SFN manner to facilitate more accurate frequency offset compensation. The corresponding non-SFN TRS configuration is provided to the UE using DCI and MAC signaling by using two TCI states containing references to the TRS of both TRPs. TRP-based compensation (Scheme B) relies on network-side frequency offset pre-compensation, where each TRP estimates the downlink frequency by using UL signals (e.g., SRS) and compensates the DL frequency per TRP before transmission. For TRP-based pre-compensation, the UE also receives two TRSs transmitted by the TRPs in a non-SFN manner using two TCI states. However, since the network pre-compensates the PDCCH and PDSCH by the difference in the observed frequency offset between the two TRPs, the frequency offset tracking at the UE is performed using only one TRS transmitted by the reference TRP.

[0163] In this disclosure, various embodiments of the disclosure can also be implemented in any type of UE, including, for example, a UE having the same, similar, or more capabilities as compared to a legacy 5G NR UE. Although various embodiments of the disclosure discuss a 3GPP 5G NR communication system, these embodiments can generally apply to UEs operating in other RATs and / or standards, such as a next release / generation of 3GPP, IEEE Wi-Fi, etc.

[0164] The term “activation” describes an operation in which the UE receives and decodes a signal from the network (or gNB) representing a starting point in time. The starting point can be a current or future slot / subframe or symbol, and the exact location is indicated implicitly or explicitly, or otherwise specified in system operation or configured by higher layers. Upon successful decoding of the signal, the UE responds according to the indication provided by the signal. The term “deactivation” describes an operation in which the UE receives and decodes a signal from the network (or gNB) representing a stopping point in time. The stopping point can be a current or future slot / subframe or symbol, and the exact location is indicated implicitly or explicitly, or otherwise specified in system operation or configured by higher layers. Upon successful decoding of the signal, the UE responds according to the indication provided by the signal.

[0165] In the present disclosure, unless explicitly stated otherwise, providing a parameter value by higher layers includes providing the parameter value through a system information block (SIB) (such as SIB1), or through common RRC signaling, or through UE-specific RRC signaling.

[0166] In the present disclosure, the suffix “-rxx” is used to denote a parameter that is not currently present in the specification and can be introduced to support the disclosed functionality, where “xx” denotes the number of the 3GPP release in which the parameter is introduced, e.g., xx=19 for Rel-19, or xx=20 for Rel-20, etc.

[0167] In the present disclosure, for the sake of brevity of description, the TDD UL-DL frame configuration provided by higher layers refers to tdd-UL-DL-ConfigurationCommon (tdd-UL-DL-configurationCommon) as an example of RRC common configuration and / or tdd-UL-DL-ConfigurationDedicated (tdd-UL-DL-configurationDedicated) as an example of UE specific configuration. The UE determines the common TDD UL-DL frame configuration of the serving cell by receiving SIB (such as SIB1) when accessing a cell from RRC_IDLE (RRC idle); or in RRC_CONNECTED, when the UE is configured with an SCell or an additional SCG by RRC signaling through IE ServingCellConfigCommon (servingCellConfigCommon). The UE determines the dedicated TDD UL-DL frame configuration using IE ServingCellConfig (servingCellConfig) when the UE is configured with a serving cell (e.g. addition or modification), where the serving cell can be a SpCell or an SCell of MCG or SCG. The TDD UL-DL frame configuration specifies time slots or symbols as one of type “D”, “U” or “F” using at least one time domain pattern with configurable periodicity.

[0168] In the present disclosure, for the sake of brevity of description, SFI refers to slot format indicator as an example, which is indicated using IE provided by higher layers such as slotFormatCombination (slotFormatCombination) or slotFormatCombinationsPerCell (slotFormatCombinationsPerCell), and is indicated to the UE by group common DCI format such as DCI F2_0, where slotFormat (slotFormat) is defined in 3GPP standard specification.

[0169] Terms such as TCI, TCI state, SpatialRelationInfo (spatialRelationInfo), target RS, reference RS and other terms are used for illustration purposes and are therefore not normative. Other terms referring to the same function can also be used. “Reference RS” corresponds to a set of characteristics of a DL RX beam or UL TX beam, such as direction, precoding / beamforming, number of ports, etc. The beam can also be referred to as spatial filter or spatial setting, and can be associated with a TCI state for QCL properties.

[0170] In FD systems where transmissions to and / or receptions from a UE are based on multiple TRPs, several problems need to be overcome when considering the UE procedures for receiving control information, the UE procedures for monitoring PDCCH, and the UE procedures for determining slot formats in relation to the limitations and shortcomings of the prior art.

[0171] The first problem relates to different received SINR conditions between non-SBFD slots / symbols and SBFD slots / symbols or between different SBFD subbands, respectively.

[0172] It needs to be considered that for gNB or TRP transmissions in full duplex systems, a different number of transmitter / receiver antennas, different effective transmitter antenna aperture areas, and / or different transmitter antenna directivities can be used for gNB or TRP transmissions in DL slots or symbols (i.e. non-SBFD slots or symbols) compared to gNB or TRP transmissions in SBFD slots or symbols. Similar considerations can apply for gNB or TRP receptions in normal UL slots or symbols compared to gNB or TRP receptions in UL subbands of SBFD slots. EPRE settings for gNB or TRP transmissions in SBFD slots or symbols with full duplex operation can be limited compared to EPRE settings for gNB or TRP transmissions in normal DL slots to prevent gNB-side or TRP-side receiver AGC blocking and to enable efficient implementation of successive interference cancellation (SIC) during gNB or TRP receptions in UL subbands of SBFD slots or symbols.

[0173] Therefore, for signals / channels transmitted by a gNB or TRP on non-SBFD slots / symbols, the gNB or TRP transmission power budget and accordingly the received signal strength available to a UE receiver can be different compared to the gNB or TRP transmission of the same signals / channels on SBFD slots / symbols. Similar observations hold when full duplex transmission and reception by a gNB based on multiple antenna panels or across TRPs is implemented. QCL and transmission timing can vary between different panels or TRPs. Transmission or reception by a gNB can be subject to different link gains depending on the antenna panel used for the transmission or reception instance. Transmission to or reception from the same UE using different TRPs can be subject to different link gains depending on the TRP used for the transmission or reception instance.

[0174] Similar observations apply to transmission or reception using different SBFD subbands, where different link conditions can arise for the same UE across TRPs or scheduled from a gNB. For example, the gNB or TRP DL Tx power budget available in a SBFD subband can be more limited compared to another SBFD subband of the gNB or TRP. For example, the transmit / receive configuration or SBFD antenna configuration or EPRE limitations due to the frequency domain placement of the SBFD subband in the NR carrier bandwidth for ensuring sufficient adjacent channel protection can be different for different TRPs.

[0175] Further, the interference level experienced by the UE receiver can be different between reception in normal DL slots or symbols and reception in SBFD slots or symbols. During reception in normal DL slots, the UE receiver can be interfered by co-channel transmissions from neighbor gNBs or TRPs. During reception in SBFD slots or symbols, the UE receiver can be subject to UE-to-UE inter-subband and / or UE-to-UE adjacent channel cross-link interference (CLI) originating from UL-to-DL transmissions in the SBFD slots or symbols. Thus, for receiving signals / channels on non-SBFD slots / symbols, the interference power level experienced by the UE receiver and its variations can be different compared to receiving signals / channels on SBFD slots / symbols.

[0176] Similar observations apply to transmission or reception using different SBFD subbands, where different interference levels can arise for the same UE across TRPs or scheduled from a gNB. For example, adjacent channel interference can affect more a first SBFD DL subband in the upper part of the NR channel bandwidth compared to a second SBFD DL subband in the lower part of the NR channel bandwidth. In another example, UE-to-UE inter-subband co-channel interference can be asymmetric with respect to the UE actual transmission bandwidth of the aggressor UE, i.e., depending on the active UL BWP, PUSCH transmission bandwidth allocation and UE Tx filtering. In the presence of intra- or inter-cell TRP operation, greater variations can be expected due to the non-co-location of the TRPs.

[0177] Therefore, in full-duplex systems, it is beneficial for the gNB to control or adjust the UE reception of DL control channels or signals (e.g., PDCCH) separately for different non-SBFD and SBFD slot or symbol types and for different SBFD subband types with respect to transmission and / or reception based on multiple TRPs. It is desirable to provide procedures that support separate control and adjustment of the UE PDCCH reception with respect to TRP A, TRP B, or both TRP A and TRP B for non-SBFD slots / symbols and SBFD slots / symbols or for different SBFD subbands on SBFD slots / symbols.

[0178] The second issue relates to interoperability constraints for supporting SBFD operation in FD systems where transmissions to and / or receptions from a UE are based on multiple TRPs.

[0179] It is to be considered that SBFD operation can not be deployed or supported by all gNBs or TRPs in an operator's TDD network. It can be expected that availability and actual use of SBFD features during system operation in a deployment and SBFD configuration in a cell can depend on many factors such as benefits, operational constraints and KPIs. Some gNBs or TRPs in a deployment grid can support SBFD, but other gNBs or TRPs can not support SBFD. For example, gNBs in one network segment from a first network vendor can support SBFD, but gNBs in another network segment from a second network vendor can not support SBFD.

[0180] In another example, gNBs or TRPs on a low frequency layer of an operator's TDD network can not support SBFD operation, while gNBs or TRPs on a high frequency layer of the same operator can support SBFD operation. Some but not all gNBs or TRPs in a network segment from the same vendor can implement and support SBFD operation, but it can not be assumed that these gNBs or TRPs use the same SBFD configuration in time and / or frequency domain. For example, gNBs or TRPs deployed by an operator for urban macro layer coverage can support SBFD operation using "DUD", but gNBs or TRPs deployed by the same operator for indoor coverage or industrial services can use a different SBFD configuration, e.g. "DU", or not at all.

[0181] Due to different available NR carrier bandwidths on NR channels, different sizes and locations of frequency domain allocation of SBFD UL subbands can be configured for different gNBs or TRPs. gNBs on different frequency layers, i.e. on different NR bands, of the same operator can operate out of sync with respect to SFN. While TDD operation in the same NR channel and in the same NR band requires gNB phase synchronization and alignment of gNB transmission timing, gNB timing alignment for dual connectivity including EN-DC or NR-NR DC can not always be achievable due to practical site and deployment limitations. Deploying TRPs by an operator for intra- or inter-cell operation can not always allow both DL transmission to and UL reception from a UE, e.g. a TRP can be used for DL transmission only to or for UL reception only from a UE. SBFD features can be available or not available on a TRP due to antenna size, antenna integration and civil engineering constraints. Some TRPs can need to be configured and use a separate SBFD configuration compared to another TRP on the same cell.

[0182] For example, when SBFD feature is available in a cell or across first and second TRPs, due to high resource utilization or high CLI level observed with respect to SBFD operation on the second TRP, SBFD operation can be used on the first TRP and not on the second TRP until network conditions or network KPIs change.

[0183] Therefore, for UE operation across TRP A with SBFD support and TRP B without SBFD support on a frequency layer, or across TRP A and TRP B both with SBFD support, it is beneficial to support different SBFD configurations for the UE to facilitate deployment and interoperability. Solutions and procedures are needed to be provided to control or adjust UE reception of DL control channels or signals (e.g., PDCCH) for a UE in a full duplex system with respect to SBFD configuration configured and / or indicated for TRP A and / or TRP B, separately.

[0184] In this disclosure, the following embodiments are provided. In one embodiment, TCI states and SBFD configurations of a TRP are linked. In one embodiment, a UE determines SBFD configuration based on configured / indicated TCI states. In one embodiment, a set of TCI states is determined by a UE based on provided / indicated SBFD configuration. In one embodiment, SBFD configuration is restricted when a UE is configured for mTRP operation.

[0185] In some embodiments, a UE can be provided with SBFD configuration based on parameter sbfd-config to determine reception and / or transmission on a serving cell supporting full duplex operation. For example, a UE can be provided with a set of RBs or a set of symbols of SBFD UL or DL subbands in a symbol or a slot based on sbfd-config. For example, a UE can be provided with a set of symbols or slots for SBFD subbands based on sbfd-config. SBFD configuration can be provided by higher layer (e.g., RRC) or can be indicated based on DCI and / or MAC-CE signaling. A combination of SBFD configuration based on higher layer parameter (such as sbfd-config) and indication by DCI and / or MAC-CE signaling can also be used. A UE can use higher layer parameter provided for SBFD configuration and based on reception or transmission conditions (such as slot type “D”, “U” or “F”) to determine SBFD configuration for a symbol or a set of symbols or a set of slots.

[0186] In one example, the SBFD configuration and / or parameters associated with the SBFD configuration are the same for all TRPs. In one example, following the aforementioned configuration examples, the SBFD configuration and / or parameters associated with the SBFD configuration can be TRP specific.

[0187] For example, the SBFD configuration can provide a set of time domain resources, e.g., symbols / slots, in which reception or transmission by the UE is allowed, possible, or not allowed. The SBFD configuration can provide a range or set of frequency domain resources, e.g., serving cell, BWP, set of start and / or end or RBs, in which reception or transmission by the UE is allowed, possible, or not allowed. The SBFD configuration can provide one or more guard intervals or guard RBs, e.g., guard SCs or RBs, guard symbols, for time domain and / or frequency domain radio resources during reception or transmission by the UE. The SBFD configuration can be provided based on one or more resource types, such as “non-SBFD symbol” or “SBFD symbol” or “Simultaneous Tx-Rx”, “Rx-only”, “Tx-only”, or “D”, “U”, “F”, “N / A”.

[0188] The SBFD configuration can be associated with one or more (e.g., for “dynamic grant”, for “configured grant”, for “any”) scheduling behaviors. The SBFD configuration and / or parameters associated with the SBFD configuration can include an indication or value for determining a Tx power setting for reception by the UE, such as a reference power for a specified channel / or signal type transmitted by the serving gNB, an energy per resource element (EPRE), or a power offset, or for determining a power and / or spatial setting for transmission by the UE.

[0189] For example, the UE can be provided with an SBFD configuration to determine support for reception and / or transmission on a serving cell in full duplex operation. For example, the UE can be provided with a set of RBs or a set of symbols (frequency domain resources) of SBFD UL or DL subbands in a symbol or in a slot. For example, the UE can be provided with a set of symbols or slots (time domain resources) for SBFD subbands. In one example, the SBFD configuration applies to all TRPs in the cell.

[0190] In one example, the SBFD configuration is provided separately for each TRP in the cell. In one example, a common SBFD configuration is provided for the cell and an additional delta configuration is provided separately for each TRP in the cell, where the delta configuration can include additional frequency domain / time domain resources to be added to the common configuration and / or excluded frequency domain / time domain resources to be excluded from the common configuration.

[0191] In one example, a SBFD configuration is provided separately for each TRP in a cell. In one example, a common SBFD configuration is provided for a first TRP of a cell and an additional delta configuration is provided for each other TRP in the cell, where the delta configuration can include additional frequency / time domain resources to be added to the common configuration and / or excluded frequency / time domain resources to be excluded from the common configuration.

[0192] For example, a SBFD configuration based on sbfd-config and / or parameters associated with the SBFD configuration can be provided by higher layers (e.g., RRC) or can be indicated based on DCI and / or MAC-CE signaling. A combination of SBFD configuration based on higher layer parameters and / or parameterization and indication by DCI and / or MAC-CE signaling can be used. The UE can use the higher layer parameters provided for the SBFD configuration and determine the SBFD configuration for a symbol or a set of symbols or a set of slots based on a reception or transmission condition, such as for a slot or symbol type “D”, “U”, or “F” or a slot or symbol type “SBFD” or “non-SBFD” or for a SBFD subband type such as “SBFD DL subband”, “SBFD UL subband”, or “SBFD flexible subband”.

[0193] For example, a SBFD configuration can provide a set of time domain resources, e.g., symbols / slots, where reception or transmission by the UE is allowed, possible, or not allowed. In one example, as described above, the time domain resources are the same (e.g., common) for all TRPs. In another example, as described above, the time domain resources can be different for each TRP. A SBFD configuration can provide a range or set of frequency domain resources, e.g., serving cell, BWP, set of start and / or end or RBs, where reception or transmission by the UE is allowed, possible, or not allowed. In one example, as described above, the frequency domain resources are the same (e.g., common) for all TRPs.

[0194] In another example, as described above, the frequency domain resources can be different for each TRP. A SBFD configuration can provide one or more guard intervals or guard RBs, e.g., guard SCs or RBs, guard symbols, for time and / or frequency domain radio resources during reception or transmission by the UE, where, as described above, the provided SBFD configuration can be the same or different for each TRP. A SBFD configuration can be provided based on one or more resource types such as “non-SBFD symbol” or “SBFD symbol” or “simultaneous Tx-Rx”, “Rx-only”, “Tx-only”, or “D”, “U”, “F”, “N / A”. In one example, a SBFD configuration is performed at a slot level.

[0195] In one example, SBFD configuration is performed at symbol level. In one example, SBFD configuration is performed at slot level and symbol level. In one example, SBFD configuration can be associated with one or more (e.g., for “dynamic grant”, for “configured grant”, for “any”) scheduling behavior. SBFD configuration and / or parameters associated with SBFD configuration can include indication or values to determine Tx power setting of reception by the UE, such as reference power, EPRE or power offset for specified channel / or signal type transmitted by the serving gNB; to determine power and / or spatial setting for transmission by the UE.

[0196] For example, SBFD configuration and / or parameters associated with SBFD configuration can be provided to the UE through common RRC signaling using SIB, or through UE specific RRC signaling such as ServingCellConfig. For example, SBFD configuration and / or parameters associated with SBFD configuration can be provided to the UE using RRC configured TDRA table, or PDCCH, PDSCH, PUCCH or PUSCH configuration, and / or DCI based signaling can be indicated to the UE to configure or allow the UE to determine SBFD configuration on symbol or slot.

[0197] For example, information of SBFD subband configuration such as SBFD UL subband in one or more SBFD symbols can be provided to the UE through higher layer signaling. For example, frequency domain location and size or frequency domain occupancy of SBFD subband can be provided to the UE by indicating or assigning starting RB and allocated bandwidth, or based on resource indicator value (RIV), or number of RBs, or bitmap. SBFD subband configuration can be provided to the UE with respect to common resource block (CRB) grid. SBFD subband configuration can be provided to the UE with respect to UE BWP configuration, e.g., excluding RBs in NR carrier BW that are not within configured or active UE BWP.

[0198] SBFD subband configuration can be provided based on reference RB and / or based on reference SCS. Information of SBFD subband configuration such as SBFD DL subband in SBFD slot or symbol can be provided to the UE through higher layer signaling. For example, frequency domain location and size or frequency domain occupancy of SBFD DL subband can be provided to the UE by indicating or assigning starting RB and allocated bandwidth, or RIV value, or number of RBs or bitmap, which is independent of the configuration provided to the UE for SBFD UL subband. SBFD DL subband configuration can be provided to the UE with respect to CRB grid or with respect to UE BWP configuration.

[0199] The SBFD DL subband configuration can be provided based on the indicated reference RB and / or based on the reference SCS. There can be multiple SBFD DL subband configurations in a SBFD symbol or slot. If multiple SBFD DL subband configurations are provided for a SBFD symbol or slot, the SBFD DL subbands can be non-contiguous. For example, two SBFD DL subband configurations for a SBFD symbol can be provided to a UE by higher layers. The same SBFD DL subband configuration or the same SBFD UL subband configuration can be provided for multiple symbols or slots, or different symbols or slots can be separately indicated or assigned individual SBFD DL subband and / or SBFD UL subband configurations.

[0200] For example, the SBFD configuration for sbfd-config and / or parameters associated with the SBFD configuration can be provided to a UE using tdd-UL-DL-ConfigurationCommon as an example of RRC common configuration and / or tdd-UL-DL-ConfigurationDedicated as an example of UE specific configuration. The UE can determine the SBFD configuration based on the common TDD UL-DL frame configuration of the serving cell by receiving a SIB (e.g., SIB1) when accessing the cell from RRC_IDLE / INACTIVE (non-active); or in RRC_CONNECTED, when the UE is configured with an SCell or an additional SCG by IE ServingCellConfigCommon based on the common TDD UL-DL frame configuration of the serving cell through RRC signaling. The UE can determine the SBFD configuration based on the dedicated TDD UL-DL frame configuration using IE ServingCellConfig when the UE is configured with a serving cell (e.g., addition or modification), where the serving cell can be a SpCell or an SCell of a MCG or a SCG. The TDD UL-DL frame configuration can specify time slots or symbols as one of “D”, “U”, or “F” using at least one time domain pattern with a configurable periodicity.

[0201] In some embodiments, TCI states can be used for beam indication. A TCI state can refer to a DL TCI state for a DL channel (e.g., PDCCH or PDSCH), a UL TCI state for a UL channel (e.g., PUSCH or PUCCH), a joint TCI state for a DL and UL channel, or separate TCI states for a UL and DL channel or signal. A TCI state can be common across multiple component carriers, or can be separate TCI states for component carriers in a set of component carriers. A TCI state can be gNB or UE panel specific or common across panels. In some examples, a UL TCI state can be replaced by a SRS resource indicator (SRI).

[0202] In some embodiments, a cell can include or comprise more than one TRP. For example, mTRP operation can be referred to as intra-cell mTRP operation. In one example, a TRP can be identified by a CORESETPoolIndex associated with a CORESET for PDCCH reception. In one example, a TRP can be identified by a set (e.g., one or more) of SS / PBCH blocks (SSBs). For example, a first group or set of SSBs belongs to or determines or identifies a first TRP, a second group or set of SSBs belongs to or determines or identifies a second TRP, and so on. In one example, a TRP can be identified by a set (e.g., one or more) of CSI-RS resources or CSI-RS resource sets. For example, a first group or set of CSI-RS resources or CSI-RS resource sets belongs to or determines or identifies a first TRP, a second group or set of CSI-RS resources or CSI-RS resource sets belongs to or determines or identifies a second TRP, and so on.

[0203] In one example, a TRP can be identified by a set (e.g., one or more) of antenna ports. For example, a first group or set of antenna ports belongs to or determines or identifies a first TRP, a second group or set of antenna ports belongs to or determines or identifies a second TRP, and so on. In one example, a TRP is identified or determined following one or more of the previous examples.

[0204] In one example, a TRP can be identified by a set (e.g., one or more) of SRS resources or SRS resource sets. For example, a first group or set of SRS resources or SRS resource sets belongs to or determines or identifies a first TRP, a second group or set of SRS resources or SRS resource sets belongs to or determines or identifies a second TRP, and so on. In one example, a TRP can be identified by a set (e.g., one or more) of TCI states (UL TCI states or DL TCI states or joint TCI states or TCI state codepoints). For example, a first group or set of TCI states belongs to or determines or identifies a first TRP, a second group or set of TCI states belongs to or determines or identifies a second TRP, and so on.

[0205] In this disclosure, for simplicity of description, in certain examples, mTRP operation of TRP A and TRP B associated with configuration and / or indication of CORESETPoolIndex of a first value and / or a second value respectively, or mTRP operation of TRP A and TRP B associated with configuration and / or indication of two simultaneous TCI states to a UE can be used. For example, a UE can receive PDCCH from TRP A using a CORESET with CORESETPoolIndex equal to a first value (e.g., zero) and from TRP B using a CORESET with CORESETPoolIndex equal to a second value (e.g., one). For example, two TCI states can be indicated to a UE in the codepoint of a DCI field “transmission configuration indication”, where a first TCI state corresponds to reception from TRP A and a second TCI state corresponds to reception from TRP B. While these can be used as examples, simultaneous update of association and / or spatial relation of SSB or CSI-RS resources to TRP A and TRP B respectively can be considered as equivalent. Terms such as “two TCI states” and other terms are used for illustration purposes and thus are not normative. Other terms referring to the same functionality can also be used.

[0206] In some embodiments, the transmission and / or reception associated with more than one TRP can involve more than one cell, where a cell is associated with a cell identifier such as a physical cell ID (PCI). For example, mTRP operation can be referred to as inter-cell mTRP operation. For example, a TRP can be identified by a CORESETPOOLIndex, by a group or set (e.g., one or more) of SSBs, by a group or set (e.g., one or more) of CSI-RS resources or resource sets, by a group or set (e.g., one or more) of SRS resources or resource sets, or by a group or set (e.g., one or more) of TCI states, such as exemplified for intra-cell mTRP. For example, a UE can be configured with SSBs associated with a PCI (referred to as an additional PCI) that is different from a PCI of a serving cell. For example, the additional PCI can be associated with one or more TCI states, and a gNB can schedule a DL or UL channel or signal from either TRP by indicating the corresponding TCI state via a TCI field in DCI.

[0207] In some embodiments, a different number of TRX, a different effective transmitter antenna aperture area, and / or a different transmitter antenna directivity setting can be used for transmission from TRP A to the UE in a slot or symbol compared to TRP B transmission, and / or a different number of TRX, a different effective receiver antenna aperture area, and / or a different receiver antenna directivity setting can be used for reception by TRP A of transmission from the UE in a slot or symbol compared to TRP B reception. For example, TRP A and TRP B transmitting to and receiving from the UE, respectively, can correspond to use of a first antenna panel and a second antenna panel on a deployment site, e.g., for gNB-side SBFD operation supported based on SBFD antenna configuration such as 3GPP standard specification SBFD configuration option 2.

[0208] For the sake of brevity of the description and for the purpose of illustration, the following example mTRP cases regarding SBFD configuration provided (e.g., configured and / or indicated) to a UE can be considered in this disclosure. The same or different SBFD configurations provided to the UE for transmission to and reception from TRP A and TRP B, respectively, can be applied over a symbol, a slot, or a duration.

[0209] In one example, TRP A and TRP B support SBFD feature and are provided with the same SBFD configuration.

[0210] In another example, TRP A and TRP B support SBFD feature and are provided with different SBFD configurations.

[0211] In one example, TRP A and TRP B are provided with the same frequency-domain SBFD configuration and are provided with different SBFD time-domain configurations.

[0212] In one example, TRP A and TRP B are provided with different frequency-domain SBFD configurations and are provided with the same SBFD time-domain configuration.

[0213] In one example, TRP A and TRP B are provided with different frequency-domain SBFD configurations and are provided with different SBFD time-domain configurations.

[0214] In one example, TRP A supports the SBFD feature while TRP B does not support the SBFD feature, e.g., corresponding to mTRP-SBFD, where no SBFD configuration is provided for TRP B.

[0215] For example, when the same time-domain and frequency-domain SBFD configurations for TRP A and TRP B are provided to the UE through higher layers for a duration (e.g., in embodiments and / or examples described in the present disclosure), including cases where the duration is not explicitly limited, such as until the UE receives another higher layer parameter that reconfigures part or all of the SBFD configurations of TRP A and / or TRP B, or such as until the higher layer configuration is released, the UE can be provided with different time-domain and / or frequency-domain SBFD configurations for TRP A and TRP B at a later time, respectively (e.g., in embodiments and / or examples described in the present disclosure).

[0216] For example, when the same time-domain and frequency-domain SBFD configurations for TRP A and TRP B are provided to the UE through higher layers (e.g., in embodiments and / or examples described in the present disclosure), and DCI-based or MAC-CE signaling to the UE indicates another usage of the SBFD configuration provided by the higher layers to indicate the transmission / reception direction on a symbol / slot or for a SBFD subband, different time-domain and frequency-domain SBFD configurations on a symbol or slot for TRP A and TRP B can be applied, respectively, e.g., in embodiments and / or examples described in the present disclosure.

[0217] For example, when different time-domain and / or frequency-domain SBFD configurations for TRP A and TRP B are provided to the UE by higher layers (e.g., in embodiments and / or examples described in the present disclosure), but the DCI-based or MAC-CE signaling to the UE indicates another use of the SBFD configuration provided by higher layers in terms of symbols / slots or for SBFD subbands for transmission / reception direction, the same time-domain and / or frequency-domain SBFD configuration on symbols or slots for TRP A and TRP B can be applied, respectively, e.g., in embodiments and / or examples described in the present disclosure.

[0218] For example, when the same or different time-domain and / or frequency-domain SBFD configurations for TRP A and TRP B are provided to the UE by higher layers (e.g., in embodiments and / or examples described in the present disclosure), but the DCI-based or MAC-CE signaling to the UE indicates another use of the SBFD configuration provided by higher layers in terms of symbols / slots or for SBFD subbands for transmission / reception direction, no SBFD configuration can be available, e.g., in embodiments and / or examples described in the present disclosure.

[0219] In one embodiment, a first SBFD configuration for TRP A and a second SBFD configuration for TRP B are provided to the UE, respectively. A first set of TCI states for TRP A and a second set of TCI states for TRP B are provided to the UE, respectively. The first SBFD configuration and the first set of TCI states (for TRP A) are associated with each other. The second SBFD configuration and the second set of TCI states for TRP B are associated with each other.

[0220] In one example, when the UE receives a DL signal or channel (such as SSB, CSI-RS, PTRS, PDCCH, or PDSCH) from TRP A on a symbol based on a TCI state in the first set of TCI states, the UE can assume reception from TRP A on the symbol according to the associated first SBFD configuration. When the UE receives a DL signal or channel (such as SSB, CSI-RS, PTRS, PDCCH, or PDSCH) from TRP B on a symbol based on a TCI state in the second set of TCI states, the UE can assume reception from TRP B on the symbol according to the associated second SBFD configuration. For example, the UE receives a DCI with a “transmission configuration indication” field, determines a TCI state based on a codepoint of the DCI with a TCI field, where the codepoint can be associated with one or two TCI states, and the UE further determines the associated SBFD configuration based on the TCI state.

[0221] In another example, when the UE receives a DL signal or channel (such as SSB, CSI-RS, PTRS, PDCCH, or PDSCH) from TRP A on a symbol based on a first SBFD configuration, the UE can assume reception from TRP A on the symbol according to TCI states in a first set of associated TCI states. When the UE receives a DL signal or channel (such as SSB, CSI-RS, PTRS, PDCCH, or PDSCH) from TRP A on a symbol based on a second SBFD configuration, the UE can assume reception from TRP A on the symbol according to TCI states in a second set of associated TCI states. For example, the UE is provided or indicated a SBFD configuration for a symbol or slot. The UE receives a DCI with a “transmission configuration indication” field. The UE determines a set of TCI states associated with the SBFD configuration.

[0222] For example, when the UE is provided or indicated a first SBFD configuration for a symbol or slot, the UE selects a first set of TCI states for reception on the symbol or slot. For example, when the UE is provided or indicated a second SBFD configuration for a symbol or slot, the UE selects a second set of TCI states for reception on the symbol or slot. A codepoint of a DCI with a TCI field can be associated with one or two TCI states. The UE determines a TCI state from the selected set of TCI states based on the first SBFD configuration or the second SBFD configuration.

[0223] In one embodiment, the UE determines a SBFD configuration for a TRP for reception from and transmission to the TRP based on a configured and / or indicated TCI state of the TRP, where the TCI state is associated with the SBFD configuration.

[0224] In one example, the UE is provided a set of N = 16 configured TCI states configured through RRC signaling (such as IE PDSCH-Config). Within the set of N configured TCI states, a first subset of N1 = 4 TCI states is associated with SSB indexes 0, 1, 2, and 3 for reception from TRP A, and a second subset of N2 = 4 TCI states is associated with SSB indexes 4, 5, 6, and 7 for reception from TRP B. A serving cell index and a QCL type can be configured. The UE is provided a first SBFD configuration of type “DUD” through RRC signaling (such as RRCReconfiguration) with a SBFD UL subband configuration on 51 center RBs in a NR carrier BW of SBFD symbols, and a second SBFD configuration of type “none”, e.g., no SBFD configuration is provided or indicated.

[0225] The first and second SBFD configurations are associated with a first subset of N1 TCI states and a second subset of N2 TCI states, respectively, through RRC signaling. For example, as part of the associated resource configuration, a UE can be indicated a list of TCI states in the first subset of N1 TCI states (or TCI state IDs) and the second subset of N2 TCI states (or TCI state IDs), respectively, for the first and second SBFD configurations. The network can activate and deactivate configured TCI states in a set of N TCI states through sending a UE-specific PDSCH (or PDCCH) TCI state activation / deactivation MAC CE, a codepoint of a DCI “Transmission Configuration Indication” field for PDSCH (or PDCCH) of a serving cell. The UE can receive an activation command based on the MAC CE that maps a codepoint of the DCI field “Transmission Configuration Indication” to one or two TCI states. For example, when a codepoint of the DCI TCI field is associated with two TCI states, respectively, one TCI state can be associated with TRP A and one TCI state can be associated with TRP B.

[0226] When a UE receives a DCI format with a TCI field that maps a codepoint to one TCI state, and the UE determines that the DCI indicates a change from a current TCI state for PDSCH reception to a new TCI state, the UE further determines an SBFD configuration associated with the new TCI state. For example, if the new TCI state is indicated in the first subset of N1 TCI states, the UE selects the first SBFD configuration of type “DUD”. For example, if the new TCI state is indicated in the second subset of N2 TCI states, the UE selects the second SBFD configuration of type “None”. The UE then assumes PDSCH reception based on the first or second SBFD configuration. For example, if the indicated new TCI state is from the first subset of N1 TCI states, the UE can not consider the PDSCH resource allocation valid if the PDSCH frequency domain allocation includes RBs in the SBFD UL subband of the first SBFD configuration, or the UE can configure its reception filtering settings based on the first SBFD configuration based on the known frequency domain location of the SBFD DL subband.

[0227] For example, if the indicated new TCI state is from a second subset of N2 TCI states, the UE can consider any PDSCH resource allocation valid, or the UE can configure its reception filtering settings based on the second SBFD configuration based on the active UE DL BWP. Suitable activation delay and / or validity duration for the SBFD configuration associated with the TCI state can be used. The activation delay and / or validity duration of the SBFD configuration can be the same or can be different with respect to the beam activation delay and / or minimum processing requirements compared to the associated TCI state.

[0228] When the UE receives a DCI format with a TCI field mapping codepoints to two TCI states, e.g., for simultaneous updating of TCI states for TRP A and TRP B, and the UE determines that the DCI indicates a change from the current TCI state for PDSCH reception to at least one new TCI state, the UE further determines the SBFD configuration associated with the new TCI state. The UE can then determine that the same or different SBFD configurations associated with the two TCI states for TRP A and TRP B, respectively, result from the indication of at least one updated TCI state in the DCI. When different SBFD configurations are associated with the two TCI states for TRP A and TRP B, respectively, suitable rules, such as based on a reference configuration, priority, ranking, list or order, subset or superset, based on more than one SBFD configuration and / or SBFD subband type, can be used to further determine the UE processing assumption.

[0229] For example, if a simultaneous TCI state update is indicated to the UE by a codepoint in the DCI TCI field, resulting in a TCI state in a first subset of N1 TCI states for TRP A and a TCI state in a second subset of N2 TCI states for TRP B, respectively, associated with a first SBFD configuration and a second SBFD configuration, respectively, when the first SBFD configuration of type “DUD” is configured as a reference configuration or is configured with a higher priority than the second SBFD configuration of type “none”, the UE can determine that DL reception in the SBFD UL subband of the first SBFD configuration associated with TRP A can also not occur for PDSCH reception from TRP B subsequently.

[0230] The motivation to enable different SBFD configurations associated with different TCI states is to support SBFD for UE operation across TRP A with SBFD support and TRP B without SBFD support, or across TRP A and TRP B with SBFD support but benefit from separate SBFD configurations for ease of deployment and interoperability. Another motivation is to increase scheduling flexibility for gNB for SBFD operation in RRC CONNECTED mode, where cell-common configuration of SBFD resources is not needed, i.e., reusing existing TCI state signaling / indication allows gNB to perform scheduling to / from UE as needed without signaling restriction.

[0231] In one example, SBFD configuration associated with one or more of N TCI states is configured by RRC. Existing MAC CE signaling can include a subset of M (M ≤ N) TCI states or TCI state codepoints in a set of N TCI states, where codepoint is signaled in the “Transmission Configuration Indication” field of DCI used to indicate TCI state, where codepoint can map to one or two TCI states. A new extended TCI field of length L’ > 3 bits can be used. Alternatively, existing first TCI field of length L = 3 bits is reused, and a new second TCI field of length L’ > 0 bits can be used. The motivation is to reduce UE modem design increment and reduce specification impact when existing DCI TCI field for indicating TCI state and / or MAC-CE based signaling for (de)activating TCI state can be reused, while allowing UE to determine SBFD configuration of TRP based on existing L1 signaling. Association of SBFD configuration with TCI state happens in higher protocol layer.

[0232] In one example, one or more SBFD configurations and N TCI states are configured by RRC. A new MAC CE signaling can include a subset of M (M ≤ N) TCI states or TCI state codepoints in the set of N TCI states and SBFD configurations associated with the subset of M TCI states or TCI state codepoints, where the codepoint is signaled in the “Transmission Configuration Indication” field of the DCI used to indicate the TCI state, where the codepoint can map to one or two TCI states. The existing TCI field of length L = 3 bits can be reused, or a new extended TCI field of length L’ > 3 bits can be used. Alternatively, the existing first TCI field of length L = 3 bits is reused, and a new second TCI field of length L’ > 0 bits can be used. The motivation is to increase the signaling flexibility in RRC_CONNECTED mode to signal one or more TCI states according to one of a set of multiple candidate SBFD configurations, with respect to one TRP or with respect to joint SBFD configuration of TRP A and TRP B.

[0233] In one example, the higher layer provides the UE with the same SBFD configuration for the configured and / or activated and / or indicated TCI states of TRP A or TRP B, respectively. The UE expects the configured or indicated TCI states for PDCCH or PDSCH reception from TRP A to be provided with the same SBFD configuration. The UE expects the configured or indicated TCI states for PDCCH or PDSCH reception from TRP B to be provided with the same SBFD configuration. Then, the SBFD configuration associated with the TCI states of TRP A and the SBFD configuration associated with the TCI states of TRP B can be the same or different. The motivation is to simplify the UE implementation without restricting the possibility to use and operate separate SBFD configurations across the two TRPs.

[0234] In one example, a first SBFD configuration associated with one or more of the N TCI states configured by RRC is associated with PDCCH reception from a TRP, and a second SBFD configuration associated with one or more of the N TCI states configured by RRC is associated with PDSCH reception from a TRP. Then, the SBFD configuration associated with the TCI states for PDCCH reception from a TRP and the SBFD configuration associated with the TCI states for PDSCH reception from a TRP can be the same or different.

[0235] In some examples, the TCI states received from the PDCCH of TRP A and TRP B, respectively, can be associated with a first and second SBFD configuration, respectively, and a third and fourth SBFD configuration can be associated with the PDSCH reception of the UE from TRP A and TRP B, respectively. For example, the first or second SBFD configuration associated with the PDCCH reception from TRP A and TRP B, respectively, can be the same. The motivation is to improve the flexibility of beamforming to ensure the coverage of the PDCCH reception of the UE based on the cell common beam.

[0236] In one example, the SBFD configuration associated with one or more of the N TCI states is configured by RRC. The existing MAC CE signaling can include a subset of M (M < N) TCI states or TCI state codepoints in a set of N TCI states, where the codepoint is signaled in the “transmission configuration indication” field of the DCI used to indicate the TCI state, where the codepoint can map to one or two TCI states. The existing TCI field of length L = 3 bits is reused. The UE is provided with a first SBFD configuration including the frequency domain allocation of one or more SBFD subbands over the SBFD symbol / slot and the time domain allocation for the SBFD symbol, where for simplicity and illustration purposes, it is assumed that the same SBFD frequency domain allocation is applied to the SBFD symbol / slot. The first SBFD configuration further includes a list of TCI states, e.g., using tci-StateID, to associate one or more TCI states with the SBFD configuration.

[0237] For example, the first SBFD configuration can include tci-StateID 1, 2, 3, and 4 associated with the reception from TRP A. The UE is provided with a second SBFD configuration including the same or different frequency and / or time domain allocation. For example, the second SBFD configuration can include tci-StateID 5, 6, 7, and 8 associated with the reception from TRP B.

[0238] In one example, SBFD configurations associated with one or more of N TCI states are configured by RRC. Existing MAC CE signaling can include a subset of M (M ≤ N) TCI states or TCI state codepoints in a set of N TCI states, where the codepoints are signaled in the “transmission configuration indication” field of DCI used to indicate TCI states, where a codepoint can map to one or two TCI states. The existing TCI field of length L = 3 bits is reused. L = 4 SBFD configurations indexed by sbfdConfigurationID 1, 2, 3, and 4 are provided to the UE, where the frequency domain and / or time domain allocations of the L SBFD configurations can be the same or different. A set of TCI states are provided to the UE, where the TCI states can be indexed by tci-StateID. The TCI state configurations are associated with SBFD configuration indices. For example, the TCI state with tci-StateID 1 is linked with the SBFD configuration of sbfdConfigurationID 2, the TCI state with tci-StateID 2 is linked with the SBFD configuration of sbfdConfigurationID 3, the TCI state with tci-StateID 3 is linked with the SBFD configuration of sbfdConfigurationID 1, and so on.

[0239] In one example, one or more SBFD configurations and N TCI states are configured by RRC. New MAC CE signaling can include a subset of M (M ≤ N) TCI states or TCI state codepoints in a set of N TCI states and SBFD configurations associated with the M TCI states or subset of TCI state codepoints, where the codepoints are signaled in the “transmission configuration indication” field of DCI used to indicate TCI states, where a codepoint can map to one or two TCI states. The existing TCI field of length L = 3 bits can be reused. For example, a first subset of M1 = 4 TCI states with tci-StateID 1, 2, 3, and 4 are associated with reception from TRP A, and a second subset of M2 = 4 TCI states with tci-StateID 5, 6, 7, and 8 are associated with reception from TRP B. L = 4 SBFD configurations indexed by sbfdConfigurationID 1, 2, 3, and 4 are provided to the UE, where the frequency domain and / or time domain allocations of the L SBFD configurations can be the same or different.

[0240] In a TCI state indication MAC CE for new UE-specific PDCCH, a TCI state ID field can indicate TCI states for TCI states identified by tci-StateID in higher layer signaling, applicable to CORESET identified by CORESET ID field. For example, TCI states in M1 TCI states and / or M2 TCI states can be indicated. Another MAC CE field can provide a SBFD configuration index field with SBFD configuration index provided by higher layer. For example, TCI state index in TCI state ID field can correspond to SBFD configuration index in order of field being mapped. The motivation is that when fewer TCI states are supported (such as for PDCCH reception), the association of PDCCH TCI state and associated SBFD configuration can be updated with reduced overhead. In another example, instead of new MAC CE with new SBFD configuration index field, a new extended TCI field with length L' > 3 bits can be used, or existing first TCI field with length L = 3 bits is reused, and a new second TCI field with length L' > 0 bits can be used to provide UE associated SBFD configuration indication for TCI state.

[0241] In one example, SBFD configuration associated with a TCI state configured or indicated for UE reception from a starting symbol and / or within the number of symbols using the TCI state is applied by the UE from the same starting symbol and / or within the number of symbols. For example, UE can receive TCI state activation command for PDCCH by MAC CE, mapping up to 8 TCI states and / or TCI state pairs to codepoints of DCI field "Transmission Configuration Indication" for one CC / DL BWP or set of CC / DL BWPs (and if applicable, one CC / UL BWP or set of CC / UL BWPs). When a set of TCI state IDs are activated for a set of CC / DL BWPs (and if applicable, a set of CC / UL BWPs), where the list of applicable CCs is determined by CCs indicated in the activation command, the same set of TCI state IDs are applied to all DL and / or UL BWPs in the indicated CCs.

[0242] If the activation command maps the TCI state and / or UL-TCI state to only one TCI codepoint, the UE applies the indicated TCI state and / or UL-TCI state to one CC / DL BWP or a set of CC / DL BWPs and, if applicable, to one CC / UL BWP or a set of CC / UL BWPs upon application of the indicated mapping of the one single TCI codepoint as described in the 3GPP standard specification. When the UE determines the SBFD configuration associated with the activated TCI state ID, if the UE is provided the higher layer parameter tci-PresentInDCI set to “enabled” for the CORESET scheduling PDSCH, the UE assumes that the TCI field is present in the DCI format 1_1 of the PDCCH transmitted on the CORESET. If the UE is provided the higher layer parameter tci-PresentDCI-1-2 for the CORESET of the PDCCH scheduling PDSCH, the UE assumes that the TCI field with the size indicated by tci-PresentDCI-1-2 is present in the DCI format 1_2 of the PDCCH. If the UE is provided tci-PresentInDCI set to “enabled” for the CORESET of the PDCCH with scheduling multicast PDSCH, the UE assumes that the TCI field is present in the DCI format 4_2 of the PDCCH. If the PDSCH is scheduled by a DCI format without TCI field and the time offset between the reception of the DL DCI and the corresponding PDSCH of the serving cell is equal to or larger than the threshold timeDurationForQCL (if applicable, where the threshold is based on the reported UE capability in the 3GPP standard specification), for determining the PDSCH antenna port quasi co-location, the UE assumes that the TCI state or QCL assumption of the PDSCH is the same as the TCI state or QCL assumption applied to the CORESET of the PDCCH transmission within the active BWP of the serving cell. The UE then applies the associated SBFD configuration corresponding to the TCI state or QCL assumption of the PDSCH according to the same processing criteria.

[0243] The motivation is to simplify UE implementation when the update of the associated SBFD configuration can follow the same processing timeline and / or activation delay and / or criteria of the update of the TCI state applied for DL signal or channel reception.

[0244] In one example, the SBFD configuration associated with the TCI state, which is the configuration or indication of the UE's reception using the TCI state from the start symbol and / or within a number of symbols, is applied by the UE based on the SBFD configuration to the individual start symbols and / or the set of individual symbols to which it applies. For example, the UE can receive a TCI state activation command for the PDCCH via the MAC CE to map up to 8 TCI states and / or TCI state pairs to code points in the DCI field "Transmission Configuration Indication," which is used for a CC / DL BWP or a set of CC / DL BWPs, and, if applicable, a set of CC / UL BWPs or CC / ULBWPs.

[0245] When a set of TCI state IDs is activated for a set of CC / DL BWPs (and, if applicable, for a set of CC / UL BWPs) (where the list of applicable CCs is determined by the CCs indicated in the activation command), the UE can apply the associated SBFD configuration corresponding to the TCI state indicated by the DCI field "Transmission Configuration Indication" on the next symbol after the last symbol of the received PDCCH, for example, independently of the TCI state or QCL assumption determined by the UE using the indicated PDSCH TCI state. The motivation is to reduce reconfiguration delay and to select an updated SBFD configuration for TRP A or TRP B relative to the TDD UL-DL frame configuration in time slots p1 and / or p2, for example, to update and control the start symbol of the associated SBFD configuration independently of the TCI state.

[0246] In one example, when the UE determines that different SBFD configurations on a symbol / slot are used for transmission to TRP A and TRPB and / or reception from TRP B, respectively, the UE further determines the transmission direction on the symbol / slot based on a default or provided reference, priority, ordering, or a list of more than one SBFD configuration. In an alternative example, the UE also determines the applicable SBFD configuration as a subset or superset based on more than one SBFD configuration. For example, the UE can support transmission to and / or reception from multiple TRPs based on the same or different SBFD configurations provided by higher layers for TRP A and TRP B, respectively.

[0247] For example, the same SBFD configuration provided by a higher layer can be applied to transmissions to and / or receptions from TRP A and / or TRP B, and the transmission direction of SBFD subbands on SBFD symbols or SBFD symbol / slot can be changed based on indications received via DCI signaling or in MAC-CE. For example, different SBFD configurations can be provided by a higher layer for transmissions to and / or receptions from TRP A and / or TRP B, respectively. Without loss of generality, additional limitations can be applied to the SBFD configurations provided and / or indicated on symbols or slots for TRP A or TRP B, such as a frequency domain limitation producing one SBFD DL subband per TRP or an SBFD “DU” type limitation on SBFD symbols for mTRP operation.

[0248] On SBFD symbols / slots where the provided or indicated SBFD configuration for TRP A and the provided or indicated SBFD configuration for TRP B result in different transmission directions, the UE determines the transmission direction on the SFBD symbol based on the reference or default TRP.

[0249] Figure 9 A flowchart of a UE method 900 for determining SBFD configuration based on TCI state for mTRP operation in full-duplex communication, according to an embodiment of the present disclosure, is shown. The UE method 900 can be performed by a UE (e.g., such as...) Figure 9 Execute as shown in 111-116). Figure 9 The embodiment of UE method 900 shown is for illustrative purposes only. Figure 10 One or more of the components shown may be implemented in a dedicated circuit configured to perform the function, or one or more of the components may be implemented by one or more processors that execute instructions to perform the function.

[0250] like Figure 1 As shown, in step 910, the UE is provided with a first set of TCI states. In step 920, the UE is provided with a first SBFD configuration. In step 930, the UE is provided with an SBFD configuration associated with the TCI states of TRP A and / or TRP B. In step 940, the UE receives a DCI with the included TCI fields and determines its value. In step 950, the UE determines whether the field value of the TCI field is associated with the SBFD configuration. In step 960, the UE selects an SBFD configuration. In step 970, based on the selected SBFD configuration, the UE adjusts the modem settings for receiving and / or transmitting from the TRP, starting from the reference symbol.

[0251] In one embodiment, the UE selects a set of TCI states and determines from the selected set of TCI states whether to receive from or transmit to the TRP based on the provided and / or indicated SBFD configuration, wherein the set of TCI states is associated with the SBFD configuration. In another embodiment, the UE selects receive or transmit parameters from a set of receive or transmit parameters based on the provided and / or indicated SBFD configuration, wherein the receive parameters may correspond to parameters received by PDCCH, PDSCH, or CSI-RS, and the transmit parameters may correspond to parameters transmitted by PUSCH, PUCCH, or SRS.

[0252] In one example, the UE is provided with two sets of TCI states, S1 and S2, where S1 indicates N1=16 configured TCI states and S2 indicates N2=8 configured TCI states. For example, RRC signaling (such as IE PDSCH-Config) can be used to configure the two sets of TCI states, S1 and S2. For instance, the first set S1, with N1=16 TCI states, links the TCI states to one of SSB indices 0, 1, 2, and 3 for reception from TRP A, and the second set S2, with N2=8 TCI states, links the TCI states to one of SSB indices 4, 5, 6, and 7 for reception from TRP B. Serving cell indexes and QCL types can be configured for the TCI states in the sets of TCI states. The UE is provided with a first SBFD configuration of type "DUD" via RRC signaling (such as RRCReconfiguration), in which the SBFD UL subband is configured on 51 center RBs in the NR carrier BW of the SBFD symbol, and a second SBFD configuration of type "None" is provided, for example, no SBFD configuration is provided or no SBFD configuration is indicated.

[0253] The first SBFD configuration and the second SBFD configuration are linked to the first set S1 and the second set S2 of TCI states, respectively, via RRC signaling. For example, the UE can be indicated to the associated set of TCI states for the first SBFD configuration or the second SBFD configuration as part of the associated resource configuration. For example, as a resource configuration, the first SBFD configuration is associated with the first set S1 of TCI states (of TRP A), and as a resource configuration, the second SBFD configuration is associated with the second set S2 of TCI states (of TRP B). The network can activate / deactivate the TCI states in the set of configurations or the TCI states in the set of TCI states by sending the TCI states of the UE-specific PDSCH (or PDCCH), the code point of the DCI "Transmission Configuration Indication" field of the PDSCH (or PDCCH) of the serving cell, or by sending the TCI states of the UE-specific PDSCH (or PDCCH) to activate or deactivate the TCI states in the set of configurations.

[0254] The UE can receive an activation command based on the MAC CE, which maps the code points of the DCI field "Transmission Configuration Indicator" to one or two TCI states. For example, when the code points of the DCI TCI field are associated with two TCI states, one TCI state can be associated with TRP A and one TCI state can be associated with TRP B, respectively. In another example, the code points of the DCI TCI field for one or two associated TCI states can correspond to TCI states in a first set S1 of TCI states or a second set S2 of TCI states, or a combination of TCI states in the first set S1 and the second set S2 of TCI states, wherein the UE's selection of the set of TCI states and / or determination of the TCI states in the selected set of TCI states is based on the provided and / or indicated SBFD configuration.

[0255] When providing or indicating SBFD configuration for a symbol or time slot to the UE, the SBFD configuration can be provided to the UE using higher-layer signaling, MAC-CE, or DCI-based signaling. For example, DCI-based signaling can correspond to unicast DCI, multicast, or public DCI formats. SBFD configuration provided or indicated for a symbol or time slot can be received in a different symbol or time slot (e.g., an earlier symbol or time slot) than to which the SBFD configuration is applied. The UE receives a DCI format with a TCI field, which maps code points to one or two TCI states. The UE determines, relative to the TCI field, whether a first or second SBFD configuration is applied to the symbol or time slot.

[0256] The UE further determines the set of associated TCI states based on the provided or indicated SBFD configuration for a symbol or time slot. For example, if a first SBFD configuration of type "DUD" is indicated to the UE, the UE selects a first subset of N1 associated TCI states linked to the first SBFD configuration. For example, if a second SBFD configuration of type "None" is indicated to the UE, the UE selects a second subset of N2 associated TCI states linked to the second SBFD configuration. The UE further determines the TCI state from the selected set of TCI states based on the code points in the TCI field of the DCI.

[0257] For example, if the indicated TCI state comes from a first subset of N1 TCI states linked to a first SBFD configuration of type "DUD", then the UE may not consider the PDSCH or PDCCH resource allocation valid if the PDSCH or PDCCH frequency domain allocation includes an RB in the SBFD UL subband of the first SBFD configuration. The UE may configure its receive filtering settings based on the known frequency domain location of the SBFD DL subband in the first SBFD configuration for receiving DCIs with a TCI field. For example, if the indicated TCI state comes from a second subset of N2 TCI states, then the UE may consider any PDSCH or PDCCH resource allocation valid.

[0258] The UE can configure its receive filtering settings based on the active UE DL BWP using a second SBFD configuration to receive DCIs with a TCI field. An appropriate activation delay, validity duration, or reference symbol can be used in the SBFD configuration associated with an indication of the TCI state or set of TCI states of the DCI with a TCI field on the symbol. The activation delay, validity duration, or reference symbol of the SBFD configuration associated with the set of TCI states can be the same or different relative to the beam activation delay and / or minimum processing requirements.

[0259] For example, when a UE receives a DCI format with a TCI field that maps code points to one or two TCI states (e.g., for simultaneously updating TRP A and TRP B), the UE can determine the TCI state from a first associated set and / or a second associated set of TCI states based on a first SBFD configuration and / or a second SBFD configuration. For example, the UE can determine that a set of supersets, subsets, unions, or restricted TCI states based on the first set and / or the second set of TCI states is indicated by the code points in the TCI field of the DCI. For example, when the first set and the second set of TCI states are linked to different SBFD configurations for TRP A and TRP B, respectively, appropriate rules (such as based on reference configuration, priority, sorting, lists, or based on the order of more than one SBFD configuration and / or SBFD subband types) can be used to further determine UE processing assumptions for receiving the TCI field in the DCI. For example, when the first SBFD configuration of type "DUD" is configured as the reference configuration or is configured with a higher priority than the second SBFD configuration of type "None", the UE selects the first set of TCI states to interpret the TCI fields in the DCI on the symbol or slot, and determines the TCI state based on the first set.

[0260] The motivation for a UE to determine the set of associated TCI states based on SBFD configuration is to support SBFD for UE operation across a TRP A with SBFD support and a TRP B without SBFD support, or across TRP A and TRP B with SBFD support but benefiting from separate SBFD configurations for ease of deployment and interoperability. Another motivation is to increase the gNB's scheduling flexibility for SBFD operation when higher-layer or DCI-based signaling used to provide or indicate the SBFD configuration to the UE is available. The UE can determine the set of associated TCI states received from TRP A or TRP B based on the provided or indicated SBFD symbol or slot configuration.

[0261] In one example, a set of N TCI states is associated with an SBFD configuration configured by RRC. Multiple sets of TCI states can be provided to the UE, such as set S1 and set S2. Existing MAC CE signaling can include M (M ≤ N) TCI states or subsets of TCI state code points from the set of N TCI states, where the code points are signaled in the "Transmission Configuration Indication" field of the DCI used to indicate the TCI state, and the code points can be mapped to one or two TCI states. A new extended TCI field of length L' > 3 bits can be used. Alternatively, the existing first TCI field of length L = 3 bits can be reused, and a new second TCI field of length L' > 0 bits can be used. The motivation is to reduce UE modem design increments and specification impacts when existing DCITCI fields for indicating TCI states and / or MAC-CE-based signaling for (de)activating TCI states can be reused, while allowing the UE to determine the set of TCI states associated with the SBFD configuration of the TRP based on existing L1 signaling. The association between the SBFD configuration and the set of TCI states occurs at a higher protocol layer.

[0262] In one example, one or more sets of TCI states (e.g., sets S1 and S2) are associated with an SBFD configuration. For simplicity, assume that sets S1 and S2 of TCI states are configured with N1 and N2 TCI states, respectively, by RRC. The new MACCE signaling may include an indication for one or more sets of TCI states, or an indication for a subset of M (M≤(N1-N2)) TCI states based on one or a combination of the sets of TCI states. The UE then uses the provided or indicated SBFD configuration to determine the M TCI states or a subset of TCI state code points, where the TCI states are obtained based on a set S1 or a set S2 or both, where the code points are signaled in the "Transmission Configuration Indication" field of the DCI, and the code points in the TCI field can be mapped to one or two TCI states. Existing TCI fields of length L=3 bits can be reused, or new extended TCI fields of length L'>3 bits can be used. Alternatively, the existing first TCI field of length L = 3 bits is reused, and a new second TCI field of length L' > 0 bits can be used. The motivation is to increase signaling flexibility in RRC_CONNECTED mode to activate or deactivate based on a set of candidate TCI states associated with one of the multiple candidate SBFD configurations.

[0263] In one example, the UE determines a set of TCI states for PDCCH reception based on a first SBFD configuration and a set of TCI states for PDSCH reception based on a second SBFD configuration. Then, the set of TCI states for PDCCH reception from the TRP associated with the SBFD configuration and the set of TCI states for PDSCH reception from the TRP associated with the SBFD configuration can be the same or different.

[0264] In one example, the associated SBFD configuration of the set of TCI states provided for the UE's reception is applied by the UE from the SBFD configuration for the same symbols that are provided and / or indicated and / or within the number of symbols that are provided and / or indicated in the SBFD configuration.

[0265] In one example, when the UE determines that different SBFD configurations on a symbol / slot are used for transmission to TRP A and TRPB and / or reception from TRP B, respectively, the UE further determines the transmission direction on the symbol / slot based on a default or provided reference, priority, ordering, or a list of more than one SBFD configuration to select the set of associated TCI states. In an alternative example, the UE also determines the applicable SBFD configurations as a subset or superset based on more than one SBFD configuration to select the set of associated TCI states.

[0266] Figure 10A flowchart is shown of a UE method 1000 for determining a set of TCI states based on SBFD configuration for mTRP operation in a full-duplex communication system according to an embodiment of the present disclosure. The UE method 1000 can be performed by a UE (e.g., such as...) Figure 10 Execute as shown in 111-116). Figure 10 The embodiment of UE method 1000 shown is for illustrative purposes only. Figure 11 One or more of the components shown may be implemented in a dedicated circuit configured to perform the function, or one or more of the components may be implemented by one or more processors that execute instructions to perform the function.

[0267] like Figure 1 As shown, in step 1010, the UE is provided with a first set of TCI states. In step 1020, the UE is provided with a first SBFD configuration. In step 1030, the UE is provided with the association of the set of TCI states with the SBFD configurations of TRP A and / or TRP B. In step 1040, the UE is provided with or indicated the SBFD configuration of the serving cell for a given duration. In step 1050, the UE determines whether the SBFD configuration is associated with the first set or the second set of TCI states of TRP A and / or TRP B. In step 1060, the UE selects the set of TCI states associated with the provided or indicated SBFD configuration. In step 1070, the UE adjusts the modem settings for receiving and / or transmitting. In step 1080, the UE receives a DCI with the included TCI fields and interprets the field values ​​of the TCI fields based on the selected set of TCI states.

[0268] In one example, the UE provides the gNB with an indication of UE capabilities: the UE supports sending to and / or receiving from multiple TRPs based solely on the configured and / or indicated SBFD configuration, based on the restricted SBFD or restricted TCI state configuration.

[0269] For example, compared to the SBFD or TCI state configuration supported by the UE for single TRP operation, the restricted SBFD or TCI state configuration supported by the UE for transmission to TRP A and TRP B and reception from TRP A and TRP B may correspond to one or a combination of the following restrictions.

[0270] In one example, SBFD frequency domain limitations on symbols / slots include, for example, the SBFD configuration type of a symbol / slot (e.g., from the set {"DU", "UD", "DUD"}), the maximum number of configurable SBFD subbands on a symbol / slot, and the maximum or minimum value of the allocated bandwidth size supported by the SBFD subbands on a symbol / slot.

[0271] In another example, SBFD time-domain limitations, such as the maximum configurable number of non-SBFD and / or SBFD symbols relative to TRP A, TRP B, or TRP and TRPB during the duration, respectively.

[0272] In yet another example, SBFD subband type restrictions, for example, based on one or a combination of types such as {"SBFD DL subband", "SBFD UL subband", "SBFD flexible subband"}, support or non-support SBFD subband types.

[0273] In yet another example, general types of SBFD limitations, such as supporting a single identical SBFD configuration in the frequency and / or time domains for TRP A and TRP B, or the maximum number of different supported SBFD configurations relative to the configurations and / or indications of TRP A and TRP B, where the identical or different SBFD configurations relative to TRP A and TRP B may correspond to the frequency and / or time domain allocation of the SBFD configuration, or SBFD operations supporting intra-cell and / or inter-cell mTRPs.

[0274] In another example, SBFD signaling restrictions include indications based on L1 or MAC-CE that only support SBFD configurations for RRC configurations for TRP A and TRP B, but not for SBFD configurations for symbols / slots.

[0275] In yet another example, SBFD processing limitations, such as a reduction in the number of default or simultaneously active or maximum configurable TCI states that the UE can use to receive DL signals or channels such as PDCCH, PDSCH, or CSI-RS, or a reduction in the number of spatial filters used for the transmission of UL channels or signals compared to a single TRP case.

[0276] In one example, when SBFD configuration is provided via higher-layer signaling and / or DCI or MAC-CE, the UE does not support sending to and / or receiving from multiple TRPs. The UE can support SBFD operation when it is not configured for mTRP operation and is configured for single TRP operation.

[0277] For example, the UE can provide the gNB with a UE capability indication: when provided with SBFD configuration, the UE does not support sending to and / or receiving from multiple TRPs.

[0278] For example, when the UE is provided with the parameter sbfd-config, the UE expects not to be provided with coresetPoolIndex, or if coresetPoolIndex is provided for some CORESETs, the UE expects to be provided with a coresetPoolIndex value that is the same for all CORESETs (e.g., equal to 0). For example, when the UE is provided with the parameter sbfd-config, the UE does not expect to be provided with simultaneousTCI-UpdateList1 or simultaneousTCI-UpdateList2 for up to two cell lists that are active in the TCI state simultaneously.

[0279] In one example, the UE supports transmitting to and / or receiving from multiple TRPs based on SBFD subband type restrictions. For example, the SBFD subband type restriction may correspond to an SBFD configuration of type "DU" or "UD" on a symbol or time slot. For instance, when provided with an SBFD configuration for transmitting / receiving from / to the gNB, the UE may support an SBFD configuration of type "DUD," but when the UE is configured to transmit to and / or receive from multiple TRPs, only SBFD configurations of type "DU" or "UD" are supported.

[0280] For example, the UE can provide the gNB with a UE capability indication that the UE supports sending to and / or receiving from multiple TRPs based on SBFD subband type restrictions. For example, a UE capability indication associated with support for SBFD subband type restrictions for TRP A and TRP B, respectively, can correspond to an SBFD configuration of type “DU” or “UD” on a symbol or slot.

[0281] For example, if the UE is provided with the parameter coresetPoolIndex, where the value is 0 for the first CORESET and 1 for the second CORESET, then for reception from a cell based on either the first or second CORESET, the UE does not expect to be provided with the same parameter sbfd-config, which indicates more than one SBFD DL or UL subband on the symbol / time slot. Similarly, when the UE is provided with simultaneousTCI-UpdateList1 or simultaneousTCI-UpdateList2 for up to two cell lists simultaneously active in TCI state, the UE does not expect to be provided with the same parameter sbfd-config, which indicates more than one SBFD DL or UL subband on the symbol / time slot for up to two cell lists or for reception from up to two cell lists.

[0282] In one example, the UE supports sending to and / or receiving from multiple TRPs based on a general type of SBFD restriction, where the UE expects the same SBFD configuration for TRP A and TRP B respectively.

[0283] For example, the UE can provide a UE capability indication to the gNB: the UE supports sending to and / or receiving from multiple TRPs based on the same SBFD configuration provided for TRPs (e.g., for TRP A and TRP B respectively). For example, a UE capability indication associated with support for the same SBFD configuration for TRP A and TRP B respectively can further correspond to the same frequency domain SBFD configuration on the symbol / slot or the same time domain SBFD configuration for the duration or the same frequency domain and time domain SBFD configuration.

[0284] For example, if the UE is provided with the parameter `coresetPoolIndex`, where the value is 0 for the first CORESET and 1 for the second CORESET, then the UE does not expect to be provided with different parameters `sbfd-config` for reception from cells based on the first CORESET or the second CORESET. For example, the UE can assume the same parameter `sbfd-config`. Similarly, when the UE is provided with `simultaneousTCI-UpdateList1` or `simultaneousTCI-UpdateList2` for up to two cell lists with simultaneous TCI state activation, the UE does not expect to be provided with different parameters `sbfd-config` for the up to two cell lists or for reception from the up to two cell lists. For example, the UE can assume the same parameter `sbfd-config`.

[0285] In one example, the UE supports a general type of SBFD limit based on a maximum number of configuration / indication SBFD configurations, transmitting to and / or receiving from multiple TRPs based on different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively). For example, the UE may support different SBFD configurations for TRP A and TRP B respectively, or it may support the same frequency-domain SBFD configuration on symbols or time slots for TRP A and TRP B but different time-domain SBFD configurations, or it may support different frequency-domain SBFD configurations on symbols or time slots for TRP A and TRP B respectively but the same time-domain SBFD configuration for TRP A and TRP B, or it may support different frequency-domain and time-domain SBFD configurations for TRP A and TRP B respectively. The UE may only support different SBFD configurations for a maximum number of LmTRPs.

[0286] For example, the UE can provide the gNB with a UE capability indication that the UE supports different SBFD configurations for a maximum number of LmTRPs, transmitting to and / or receiving from multiple TRPs based on different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively). For example, a UE capability indication associated with supporting different SBFD configurations for TRP A and TRP B respectively could correspond to supporting the same frequency domain SBFD configuration on symbols or timeslots for TRP A and TRP B but different time domain SBFD configurations, or it could correspond to supporting different frequency domain SBFD configurations on symbols or timeslots for TRP A and TRP B respectively but the same time domain SBFD configuration for TRP A and TRP B, or it could correspond to supporting both different frequency domain and time domain SBFD configurations for TRP A and TRP B respectively.

[0287] For example, if the UE is provided with the parameter `coresetPoolIndex`, where the value is 0 for the first CORESET and 1 for the second CORESET, then for reception from a cell based on either the first or second CORESET, the UE does not expect to be provided with the parameter `sbfd-config`, which indicates a different frequency domain allocation of the SBFD DL or UL subband on the symbol / time slot relative to the value of `coresetPoolIndex` (which is 0 or 1). Similarly, when the UE is provided with `simultaneousTCI-UpdateList1` or `simultaneousTCI-UpdateList2` for up to two cell lists simultaneously active in TCI state, the UE does not expect to be provided with the parameter `sbfd-config`, which indicates a different frequency domain allocation of the SBFD DL or UL subband on the symbol / time slot relative to or for reception from up to two cell lists.

[0288] For example, if the UE is provided with the parameter `coresetPoolIndex`, where the value is 0 for the first CORESET and 1 for the second CORESET, then for reception from a cell based on either the first or second CORESET, the UE does not expect to be provided with the parameter `sbfd-config`, which indicates a different time-domain allocation of the SBFD DL or UL subband on the symbol / slot relative to the value of `coresetPoolIndex` (which is 0 or 1). Similarly, when the UE is provided with `simultaneousTCI-UpdateList1` or `simultaneousTCI-UpdateList2` for up to two cell lists simultaneously active in TCI state, the UE does not expect to be provided with the parameter `sbfd-config`, which indicates a different time-domain allocation of the SBFD DL or UL subband on the symbol / slot relative to or for reception from up to two cell lists.

[0289] In one example, the UE supports sending to and / or receiving from multiple TRPs based on the same or different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively), even with SBFD processing limitations. For example, the UE may support SBFD configurations for TRP A and TRP B respectively, but reception from TRP A and TRP B occurs in separate SBFD subbands. For example, when SBFD configurations for sending to and / or receiving from multiple TRPs are provided, the UE may support an SBFD configuration of type "DUD", but the CORESET with a first value (e.g., 0) coresetPoolIndex is allocated in the first SBFD DL subband, while the CORESET with a second value (e.g., 1) coresetPoolIndex is allocated in the second SBFD DL subband or the SBFD UL subband of the SBFD type "DUD" configuration.

[0290] For example, the UE can provide the gNB with a UE capability indication that the UE supports transmitting to and / or receiving from multiple TRPs based on the SBFD configuration provided for each TRP (e.g., for TRP A and TRP B respectively), even with SBFD processing restrictions. For example, a UE capability indication associated with supporting SBFD configurations for TRP A and TRP B respectively could correspond to SBFD subbands of the number of LSBs allowed for receiving from TRP A and TRP B respectively. For example, when an SBFD configuration for transmitting / receiving from / to the gNB is provided, the UE can support an SBFD configuration of type "DUD," but when the UE is configured to transmit to and / or receive from multiple TRPs (for which the SBFD configuration is provided to the UE), reception from TRP A and TRP B is restricted to separate SBFD subbands on symbols / slots, such as SBFD DL subband 1 and SBFD DL subband 2.

[0291] For example, if the UE is provided with the parameter `coresetPoolIndex`, where the value is 0 for the first CORESET and 1 for the second CORESET, then the UE does not expect to be provided with the parameter `sbfd-config` for reception from a cell based on either the first or second CORESET, where the frequency domains of the first and second CORESETs are allocated in the same SBFD DL subband on the symbol / time slot. For example, when the UE is provided with `simultaneousTCI-UpdateList1` or `simultaneousTCI-UpdateList2` for up to two cell lists simultaneously active in TCI state, the UE does not expect to be provided with the parameter `sbfd-config` for cells in the first and second cell lists, respectively, associated with DL reception from cells in the first serving cell list and cells in the second serving cell list in the same SBFD DL subband on the symbol / time slot.

[0292] In one example, the UE supports transmitting to and / or receiving from multiple TRPs based on the same or different provided SBFD configurations for TRPs (e.g., for TRP A and TRP B respectively), where the SBFD processing limit corresponds to the number of supported SBFD subbands on symbols / slots during the duration. In one example, the number of supported SBFD subbands may be associated with the number of different SBFD subband types (e.g., SBFD DL subband, SBFD UL subband, SBFD flexible subband) provided to the UE on symbols or slots. In one example, the number of SBFD subbands may be associated with the number of symbols or slots for which the UE supports SBFD subbands of SBFD subband types for TRP A, TRP B, or both TRP A and TRP B for transmission and / or reception during the duration.

[0293] The duration can be appropriately selected, for example, per slot, per subframe, or a reference duration. In one example, the total number N of supported SBFD subbands within the duration can be associated with a first number N1 of SBFD subbands of the SBFD subband type on a symbol or slot and a second number N2 of SBFD symbols within the duration. For example, the UE can indicate the capability: the UE can support N = 40, for example, using N1 = 2 SBFD DL subbands with “DUD” on a symbol for N2 = 20 SBFD symbols with the same configuration, or using N1 = 2 SBFD DL subbands with “DUD” on a symbol for N2 = 10 symbols and using N1 = 1 SBFD DL subband with “DU” on N3 = 20 symbols.

[0294] For example, the UE can provide the gNB with a UE capability indication: the number of SBFD subbands supported by the UE, based on the same or different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively), for transmitting to and / or receiving from multiple TRPs. In one example, the number of SBFD subbands supported by the UE capability can be associated with the number of different SBFD subband types (e.g., SBFD DL subband, SBFD UL subband, SBFD flexible subband) provided to the UE on symbols or time slots. In another example, the number of SBFD subbands in the UE capability can be associated with the number of symbols or time slots for transmitting and / or receiving SBFD subbands of SBFD subband types for TRP A, TRP B, or both TRP A and TRP B during a given duration.

[0295] For example, if the UE is provided with the parameter `coresetPoolIndex`, where the value is 0 for the first CORESET and 1 for the second CORESET, the UE does not expect to be provided with the parameter `sbfd-config` for reception in cells based on the first CORESET or the second CORESET respectively, resulting in more than N potential SBFD DL subband receptions or potential SBFD UL subband transmissions over a duration, where the number N is determined by the UE's processing capabilities. For example, when the UE is provided with `simultaneousTCI-UpdateList1` or `simultaneousTCI-UpdateList2` for up to two cell lists with simultaneous TCI state activation, the UE does not expect to be provided with the parameter `sbfd-config` for cells in the first cell list and cells in the second cell list respectively, resulting in more than N potential SBFD DL subband receptions or potential SBFD UL subband transmissions for the up to two cell lists or for reception from the up to two cell lists over a duration, where the number N is determined by the UE's processing capabilities.

[0296] In one example, the UE supports SBFD based on a general type of restriction, sending to and / or receiving from multiple TRPs based on the same or different provided SBFD configurations, where the restriction is that the UE supports SBFD only for intra-cell TRP cases, for example, when the UE is not configured with an SSB associated with a PCI or additional PCI different from the serving cell PCI.

[0297] For example, the UE can provide the gNB with a UE capability indication: the UE supports sending to and / or receiving from multiple TRPs based on the same or different provided SBFD configurations, only for intra-cell TRP situations, for example, when the UE is not configured with an SSB associated with a PCI or additional PCI different from the serving cell PCI.

[0298] For example, if the UE is provided with the parameter additionalPCI, the UE does not expect to be provided with the parameter sbfd-config.

[0299] In one example, the UE supports sending to and / or receiving from multiple TRPs in inter-cell TRP operations with general-type SBFD restrictions when the UE is provided with additional PCI, wherein the SBFD restrictions are associated with the use of the same provided SBFD configuration for the TRPs (e.g., for TRP A and TRP B respectively).

[0300] For example, the UE can provide the gNB with a UE capability indication: the UE supports sending to and / or receiving from multiple TRPs for inter-cell TRP operations based on the same provided SBFD configuration for TRPs (e.g., for TRP A and TRP B respectively) when the UE is provided with additional PCI.

[0301] For example, if the UE is provided with the parameter additionalPCI and the parameter coresetPoolIndex, which has a value of 0 for the first CORESET and a value of 1 for the second CORESET, then the UE does not expect to be provided with different parameters sbfd-config for reception from cells based on the first CORESET or the second CORESET. For example, the UE can assume the same value for the parameter sbfd-config. Similarly, if the UE is provided with the parameter additionalPCI and the UE is provided with simultaneousTCI-UpdateList1 or simultaneousTCI-UpdateList2 for up to two cell lists with simultaneous TCI state activation, then the UE does not expect to be provided with different parameters sbfd-config for the up to two cell lists or for reception from the up to two cell lists. For example, the UE can assume the same parameter sbfd-config.

[0302] In another example, the UE supports inter-cell TRP operations (e.g., when the UE is provided with additional PCI) by sending to and / or receiving from multiple TRPs based on different provided SBFD configurations for TRPs (e.g., for TRP A and TRP B respectively).

[0303] For example, the UE can provide the gNB with an indication of UE capabilities: the UE supports inter-cell TRP operations (e.g., when the UE is provided with additional PCI), and can send to and / or receive from multiple TRPs based on different provided SBFD configurations for TRPs (e.g., for TRP A and TRP B respectively).

[0304] In one example, the UE supports sending to and / or receiving from multiple TRPs based on SBFD signaling restrictions, based on the same or different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively), where the SBFD signaling restrictions correspond to SBFD configuration performed only by higher layers. For example, when the SBFD configuration is configured by a higher layer, the UE supports sending to and / or receiving from TRP A and / or TRP-B, but the UE does not support changing the transmission direction based on an indication received via DCI or MAC-CE of the transmission direction of the SBFD subband configured on the symbol or time slot that will change or assign the SBFD configuration.

[0305] For example, the UE can provide the gNB with a UE capability indication that the UE supports sending to and / or receiving from multiple TRPs solely through higher layers, based on the same or different SBFD configurations provided for TRPs (e.g., for TRP A and TRP B respectively). For example, using this UE capability, the UE indicates that it supports sending to and / or receiving from TRP A and / or TRP B when the SBFD configuration is provided using higher-layer signaling (such as RRC signaling), but the UE will not adjust the SBFD configuration based on an indication received by the UE in the DCI or MAC-CE that would change or assign the configuration of the SBFD subband on a different transmission direction.

[0306] For example, if the UE is provided with the parameter coresetPoolIndex, where the value is 0 for the first CORESET and 1 for the second CORESET, or when the UE is provided with simultaneousTCI-UpdateList1 or simultaneousTCI-UpdateList2 for up to two cell lists simultaneously active in TCI state, the UE considers the symbols in the slots indicated by sbfd-config as SBFD DL subbands to be available for reception, and considers the symbols in the slots indicated by sbfd-config as SBFD UL subbands to be available for transmission. For the parameter sbfd-config provided for the set of symbols or the set of RBs on the symbols in the slots of the SBFD DL subbands, the UE does not expect to detect the DCI format indicating UL transmission. For the parameter sbfd-config provided for the set of symbols or the set of RBs on the symbols in the slots of the SBFD UL subbands, the UE does not expect to detect the DCI format indicating DL reception.

[0307] The motivation for a UE to support transmission to and / or reception from multiple TRPs based on a restricted SBFD configuration is to reduce UE modem complexity, achieve faster UE processing timelines, and improve radio range. For example, when the same restricted frequency domain configuration for the SBFD DL subband or SBFD UL subband is provided for the UE to transmit to and receive from TRP A and TRP B respectively, the UE can select the same UE Tx and / or Rx filter settings for receiving in the SBFD DL subband and transmitting from the UE in the SBFD UL subband. This increases inter-subband interference suppression and improves radio range. For instance, when the UE does not need to support multi-TRP operation in inter-cell TRP scenarios, fewer SSB-based measurements associated with the additionalPCI parameter need to be performed by the UE, and the number of UE processes handling received SSBs is reduced when SBFD configurations (e.g., the SBFD UL subband) exist on the SSB symbols of both cells.

[0308] For example, the UE can provide capability information to the gNB or indicate whether the UE supports sending to and / or receiving from multiple TRPs based on UE radio access capability parameters and / or on mandatory or optional feature groups, based on restricted SBFD configuration. For example, the UE can include capability information as an IE in the RRC UECapabilityInformation message. The gNB can solicit or request reports from the UE related to its support for SBFD configurations for multi-TRP operation in the RRC UECapabilityEnquiry message. Support for SBFD configurations associated with multi-TRP operation and / or restrictions associated with UE capabilities can be further differentiated and individually indicated regarding UE support for frequency ranges (FRs) or bands or band combinations, or provided in combination, or may be interdependent with other features such as MIMO support on or for band combinations.

[0309] For example, one or more feature groups (FGs) associated with UE support and / or limitations for transmitting to and / or receiving from multiple TRPs using one or more provided SBFD configurations can be provided by 3GPP standard specifications. For example, a first FG might indicate that the UE supports transmitting to and / or receiving from multiple TRPs based on the same provided SBFD configuration for each TRP (e.g., for TRP A and TRP B, respectively). For example, a second FG might indicate that if the same frequency domain configuration for the SBFD DL subband or SBFD UL subband is provided by SBFD configurations for TRP A and TRP B, respectively, the UE supports transmitting to and / or receiving from multiple TRPs based on different provided SBFD configurations for each TRP (e.g., for TRP A and TRP B, respectively). FGs can be included in a default feature set or feature set group, or as part of a default feature set or feature set group, which the UE indicates to the network during connection establishment or when solicited by the network.

[0310] Figure 11 A flowchart illustrating a UE method 1100 for a restricted SBFD configuration for mTRP operation indication in a full-duplex communication system according to an embodiment of the present disclosure is shown. UE method 1100 can be performed by a UE (e.g., such as...) Figure 11 Execute as shown in 111-116). Figure 11 The embodiment of UE method 1100 shown is for illustrative purposes only. ​ One or more of the components shown may be implemented in a dedicated circuit configured to perform the function, or one or more of the components may be implemented by one or more processors that execute instructions to perform the function.

[0311] like ​ As shown, in step 1110, the UE receives an RRC UECapabilityEnquiry message for the NR band. In step 1120, the UE selects the indicated SBFD processing capability for the NR band. In step 1130, the UE selects the indicated mTRP processing capability for the NR band. In step 1140, the UE selects the indicated simultaneous restricted SBFD and mTRP processing capability for the NR band. In step 1150, the UE sends an RRC UECapabilityinformation message for the NR band, including the indicated simultaneous restricted SBFD and mTRP processing capabilities.

[0312] The flowcharts above illustrate example methods that can be implemented according to the principles of this disclosure, and various modifications can be made to the methods shown in the flowcharts herein. For example, although shown as a series of steps, the individual steps in each diagram can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, steps can be omitted or replaced with other steps.

[0313] Although this disclosure has been described using exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. This disclosure is intended to cover such changes and modifications that fall within the scope of the appended claims. Nothing described 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 for operating a user equipment (UE), the method comprising: Receive the first candidate subband full-duplex (SBFD) configuration associated with the first transmission configuration indicator (TCI) status configuration on the cell; Receive the second candidate SBFD configuration associated with the second TCI state configuration on the cell; Identify TCI status code points; (i) When the value of the TCI status code point is associated with the first TCI status configuration, the first candidate SBFD configuration is selected, or (ii) when the value of the TCI status code point is associated with the second TCI status configuration, the second candidate SBFD configuration is selected; Receive or transmit channels or signals based on the selected SBFD configuration. The value of the TCI status code point is based on the set of values ​​associated with the set of Transmitter-Receiver Points (TRPs).

2. The method of claim 1 further includes receiving downlink control information (DCI) format including TCI status code points or media access control (MAC) layer control elements (CE).

3. The method according to claim 1, wherein: The first TCI status code point in the first TCI status configuration or the second TCI status code point in the second TCI status configuration includes: Downlink (DL) TCI status, Uplink (UL) TCI status, Combined TCI status, or The pairing of DL TCI state and UL TCI state; and TCI states include source reference signals for quasi-co-location or source reference signals for spatial information.

4. The method according to claim 1, further comprising: Receive Physical Downlink Shared Channel (PDSCH) configuration; The downlink (DL) receive parameters in the slot or symbol for the PDSCH receive instance are determined based on the selected SBFD configuration; and Receive PDSCH based on DL receive parameters.

5. The method according to claim 1, further comprising: Receive Physical Uplink Shared Channel (PUSCH) configuration; The uplink (UL) transmission parameters in the slot or symbol used for the PUSCH transmission instance are determined based on the selected SBFD configuration; and PUSCH is sent based on UL transmission parameters.

6. The method according to claim 1, wherein: The first or second candidate SBFD configuration includes frequency domain restrictions on the transmissions associated with the set of TRPs, and When the frequency domain allocation of the Physical Uplink Shared Channel (PUSCH) is within the frequency domain constraints, PUSCH transmission is permitted on the TRPs in the set of TRPs.

7. The method according to claim 1, wherein: The first or second candidate SBFD configuration includes receive frequency domain constraints associated with the set of TRPs, and When the frequency domain allocation of the Physical Downlink Shared Channel (PDSCH) is within the frequency domain limits, PDSCH reception is permitted on TRPs within the set of TRPs.

8. A user equipment (UE), comprising: The transceiver is configured as follows: Receive the first candidate subband full-duplex (SBFD) configuration associated with the first Transport Configuration Indicator (TCI) state configuration on the cell; and Receive the second candidate SBFD configuration associated with the second TCI state configuration on the cell; and A processor, operatively coupled to the transceiver, is configured to: Identify TCI status code points; and (i) When the value of the TCI status code point is associated with a first TCI status configuration, the first candidate SBFD configuration is selected; or (ii) when the value of the TCI status code point is associated with a second TCI status configuration, the second candidate SBFD configuration is selected. The transceiver is also configured to receive or transmit channels or signals based on the selected SBFD configuration, and The value of the TCI status code point is based on the set of values ​​associated with the set of Transmitter-Receiver Points (TRPs).

9. The UE according to claim 8, wherein, The transceiver is also configured to receive downlink control information (DCI) format including TCI status code points or media access control (MAC) layer control elements (CE).

10. The UE according to claim 8, wherein: The first TCI status code point in the first TCI status configuration or the second TCI status code point in the second TCI status configuration includes: Downlink (DL) TCI status, Uplink (UL) TCI status, Combined TCI status, or The pairing of DL TCI state and UL TCI state; and TCI states include source reference signals for quasi-co-location or source reference signals for spatial information.

11. The UE according to claim 8, wherein: The transceiver is also configured to receive Physical Downlink Shared Channel (PDSCH) configurations; The processor is also configured to determine downlink (DL) receive parameters in a slot or symbol for a PDSCH receive instance based on the selected SBFD configuration; and The transceiver is also configured to receive PDSCH based on DL receive parameters.

12. The UE according to claim 8, wherein: The transceiver is also configured to receive the Physical Uplink Shared Channel (PUSCH) configuration; The processor is also configured to determine uplink (UL) transmission parameters in a slot or symbol for a PUSCH transport instance based on the selected SBFD configuration; and The transceiver is also configured to send PUSCH based on UL transmission parameters.

13. The UE according to claim 8, wherein: The first or second candidate SBFD configuration includes frequency domain restrictions on the transmissions associated with the set of TRPs, and When the frequency domain allocation of the Physical Uplink Shared Channel (PUSCH) is within the frequency domain constraints, PUSCH transmission is permitted on the TRPs in the set of TRPs.

14. The UE according to claim 8, wherein: The first or second candidate SBFD configuration includes receive frequency domain constraints associated with the set of TRPs, and When the frequency domain allocation of the Physical Downlink Shared Channel (PDSCH) is within the frequency domain limits, PDSCH reception is permitted on TRPs within the set of TRPs.

15. A base station (BS), comprising: processor; and A transceiver, operatively coupled to the processor, is configured to: Transmit the first candidate subband full-duplex (SBFD) configuration associated with the first Transport Configuration Indicator (TCI) state configuration on the cell; and Send the second candidate SBFD configuration associated with the second TCI state configuration on the cell; and Receive or transmit channels or signals associated with the SBFD configuration, and Wherein, (i) when the value of the TCI status code point is associated with a first TCI status configuration, the SBFD configuration is based on a first candidate SBFD configuration, or (ii) when the value of the TCI status code point is associated with a second TCI status configuration, the SBFD configuration is based on a second candidate SBFD configuration, and The value of the TCI status code point is based on the set of values ​​associated with the set of Transmitter-Receiver Points (TRPs).

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