Apparatus, method and medium for facilitating full-duplex operation using an advanced searcher

Abstract

Disclosed herein are apparatus, methods, and computer-readable media for facilitating full-duplex operation. The disclosed techniques include using an advanced searcher. An example method for wireless communication at a first wireless device includes receiving a reference signal set from a second wireless device. The example method also includes determining a first set of BPLs based on the reference signal set. The example method also includes determining a second set of BPLs based on a capability for full-duplex operation with at least one BPL in the first set of BPLs. Furthermore, the example method includes performing measurements on the second set of BPLs. The example method also includes communicating using full-duplex operation by transmitting or receiving via a BPL in the first set of BPLs while also performing the other of transmitting or receiving via a BPL in the second set of BPLs.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to U.S. Provisional Application No. 63 / 037,424, filed on June 10, 2020, entitled “METHODS AND APPARATUS TO FACILITATE FULL-DUPLEX OPERATION USING AN ADVANCED SEARCHER,” and U.S. Patent Application No. 17 / 338,511, filed on June 3, 2021, entitled “FACILITATING FULL-DUPLEX OPERATION USING AN ADVANCED SEARCHER,” all of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to communication systems and, more particularly, to wireless communications including full-duplex operation. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution released by the 3rd Generation Partnership Project (3GPP) to meet new requirements related to latency, reliability, security, scalability (e.g., Internet of Things (IoT)), and other requirements. 5G NR includes services related to enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. These improvements may also be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the Invention

[0006] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be presented later.

[0007] In some examples, a wireless communication device may be capable of full-duplex operation. For example, a wireless communication device may be capable of sending and receiving communications simultaneously (or nearly simultaneously). Thus, a wireless communication device capable of full-duplex operation may be capable of sending communications using a first beam and receiving communications using a second beam. Example techniques disclosed herein enable a wireless communication device to use a first beam candidate that is capable of communication (e.g., for receiving or sending communications) to prioritize searching for a second beam candidate that is capable of communication (e.g., for the other of receiving or sending communications) and that is also full-duplex capable (e.g., that is capable of communication while also communicating using the first beam candidate). By prioritizing searching for the second beam candidate using the first beam candidate, the disclosed techniques enable the wireless communication device to reduce latency associated with finding and / or reporting beam candidates by reducing the number of beam candidates on which measurements are performed.

[0008] In one aspect of the present disclosure, a method, computer-readable medium, and apparatus are provided for wireless communication at a first wireless device. The example apparatus receives a set of reference signals from a second wireless device. The example apparatus further determines a first set of beam pair links (BPLs) based on the set of reference signals. The example apparatus further determines a second set of BPLs based on a capability for full-duplex operation with at least one of the BPLs in the first set. Furthermore, the example apparatus performs measurements on the second set of BPLs. Furthermore, the example apparatus communicates using full-duplex operation by transmitting or receiving via a BPL in the first set of BPLs while also transmitting or receiving via a BPL in the second set of BPLs.

[0009] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0016] Figure 4 is a diagram illustrating a first device communicating with a second device.

[0017] Figure 5 A communication system including a first device communicating with a second device is shown in accordance with one or more techniques disclosed herein.

[0018] Figure 6 A communication system including a first device communicating with a second device and a third device is shown in accordance with one or more techniques disclosed herein.

[0019] Figure 7A An example communication system is shown that includes a first device (such as a UE) communicating with a second device (such as a base station) in accordance with one or more techniques disclosed herein.

[0020] Figure 7B An example communication system is shown that includes a first device (such as a mobile terminal node) communicating with a second device (such as a distributed unit node) in accordance with one or more techniques disclosed herein.

[0021] Figure 8 An example communication system including a parent node in communication with a wireless device is shown in accordance with one or more techniques disclosed herein.

[0022] Figure 9A An example communication system including a parent node, an integrated access and backhaul (IAB) device, and child nodes is shown in accordance with one or more techniques disclosed herein.

[0023] Figure 9B Another example communication system including a parent node, an IAB device, and child nodes is shown in accordance with one or more techniques disclosed herein.

[0024] Figure 10is an example communication flow between a first communication device and a second communication device according to the teachings disclosed herein.

[0025] Figure 11 is an example communication flow between a wireless device, a first parent node, and a second parent node in accordance with one or more techniques disclosed herein.

[0026] Figure 12 is an example communication flow between an integrated access and backhaul (IAB) device, a parent node, and a child node in accordance with one or more techniques disclosed herein.

[0027] Figure 13 is a flow chart of a method of wireless communication at a wireless device according to the teachings disclosed herein.

[0028] Figure 14 is a flow chart of a method of wireless communication at a wireless device according to the teachings disclosed herein.

[0029] Figure 15 is a diagram illustrating an example of a hardware implementation for an example apparatus according to the teachings disclosed herein. DETAILED DESCRIPTION

[0030] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. The detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0031] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and design constraints imposed on the overall system.

[0032] For example, any part of an element or an element or any combination of elements can be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout the disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc., whether referring to software, firmware, middleware, microcode, hardware description languages, or other.

[0033] Therefore, in one or more example aspects, the functions described can be implemented in hardware, software, or any combination thereof. If implemented in software, these functions can be stored on a computer-readable medium or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. The storage medium can be any available medium that a computer can access. By way of example and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0034] Although various aspects and implementations are described in this application by way of illustration of certain examples, it will be understood by those skilled in the art that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementation and / or use can be achieved through integrated chip implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchase devices, medical devices, devices supporting artificial intelligence (AI), etc.). Although some examples may or may not be specifically targeted at use cases or applications, the innovations described may have a wide variety of applicability. The scope of implementation can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the innovations. In some actual settings, the devices incorporating the various aspects and features described may also include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals must include multiple components for both analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.) It is expected that the innovations described herein can be practiced in devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0035] Various aspects presented herein enable a wireless communication device to communicate using full-duplex operation by sending and receiving communications simultaneously (or nearly simultaneously). For example, various aspects presented herein enable a wireless communication device capable of full-duplex operation to send a communication using a first beam while also receiving another communication using a second beam. Example techniques disclosed herein enable a wireless communication device to use a first beam candidate that can be used for communication (e.g., for receiving or sending a communication) to prioritize searching for a second beam candidate that can be used for communication (e.g., for the other of receiving or sending a communication) and has full-duplex capability (e.g., can be used for communication while also communicating using the first beam candidate). By prioritizing searching for a second beam candidate using a first beam candidate, the disclosed techniques enable a wireless communication device to reduce latency associated with finding and / or reporting beam candidates by reducing the number of beam candidates on which measurements are performed.

[0036] Figure 11 is a diagram illustrating an example of a wireless communication system and access network 100 including base stations 102 and 180 and a UE 104. The wireless communication system and access network 100 may include one or more UEs 104 communicating with a base station 102 or 180. The wireless communication system and access network 100 may include a UE 104 communicating with other UEs 104. The wireless communication system and access network 100 may include an integrated access and backhaul (IAB) network that includes multiple cells communicating with each other, providing an access network and a backhaul network to a core network such as a core network 190 or an evolved packet core (EPC) 160. The core network 190 may be a 5G core (5GC), for example, a core network supporting new radio (NR) communications or another type of core network. The IAB network may include one or more IAB nodes 103. The IAB node may exchange communications with other IAB nodes 104, base stations 102 or 180, and / or UEs 104.

[0037] In some examples, a wireless communication device (such as UE 104, IAB node 103, and / or base station 102 / 180) can be configured to manage one or more aspects of wireless communication by facilitating an improved search for a second beam candidate that can be full-duplexed with a first beam candidate. Figure 1 In the embodiment of the present invention, the UE 104, the IAB node 103, and / or the base station 102 / 180 may include a full-duplex beam search component 198. In various specific aspects, the full-duplex beam search component 198 may also be configured to receive a set of reference signals from a second wireless device. The exemplary full-duplex beam search component 198 may also determine a first set of beam pair links (BPLs) based on the set of reference signals. The exemplary full-duplex beam search component 198 may also be configured to determine a second set of BPLs based on a capability of full-duplex operation with at least one BPL in the first set of BPLs. The exemplary full-duplex beam search component 198 may also be configured to perform measurements on the second set of BPLs. The exemplary full-duplex beam search component 198 may also be configured to communicate using full-duplex operation by transmitting or receiving via a BPL in the first set of BPLs while also performing the other of transmitting or receiving via a BPL in the second set of BPLs.

[0038] Various aspects presented herein may enable a wireless device to improve communication performance, for example, by reducing the number of beams that may be processed to determine full-duplex communication.

[0039] Although the following description provides examples for 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and / or other wireless technologies in which full-duplex operation may be utilized.

[0040] Figure 1 An example of a wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0041] A base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. Among other functions, the base station 102 can perform one or more of the following: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and transmission of warning message transmissions. Base stations 102 can communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) via a third backhaul link 134 (eg, an X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 can be wired or wireless.

[0042] Base stations 102 can communicate wirelessly with UEs 104. Each base station 102 can provide communication coverage for its own geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include home evolved Node Bs (eNBs) (HeNBs), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between the base station 102 and the UE 104 can include uplink (UL) (also known as reverse link) transmissions from the UE 104 to the base station 102 and / or downlink (DL) (also known as forward link) transmissions from the base station 102 to the UE 104. The communication link 120 can use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be over one or more carriers. The base station 102 / UE 104 can use spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) for each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may be adjacent to each other or not. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

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

[0044] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0045] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can adopt NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) used by Wi-Fi AP 150. Small cell 102' adopting NR in unlicensed spectrum can improve access network coverage and / or increase access network capacity.

[0046] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, the two initial operating bands are identified with the frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. FR2 sometimes presents a similar naming issue, although it is different from the Extremely High Frequency (EHF) band (30 GHz–300 GHz), which is designated as the "millimeter wave" band by the International Telecommunication Union (ITU). FR2 is often (interchangeably) referred to as the "millimeter wave" band in documents and articles.

[0047] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR research has identified the operating band for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz–24.25 GHz). Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, effectively extending the characteristics of FR1 and / or FR 2 to mid-band frequencies. In addition, higher frequency bands are currently being utilized to extend 5G NR operation above 52.6 GHz. For example, the three higher operating bands are identified with the frequency range designations FR4a or FR4-1 (52.6 GHz–71 GHz), FR4 (52.6 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0048] In view of the above aspects, unless otherwise specified, it should be understood that the term "sub-6 GHz" or the like as used herein can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, it should be understood that the term "millimeter wave" or the like as used herein can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or may be within the EHF band.

[0049] Base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), can include and / or be referred to as an eNB, gNodeB (gNB), or other type of base station. Some base stations, such as gNB 180, can operate in the traditional sub-6 GHz spectrum, millimeter wave frequencies, and / or near-millimeter wave frequencies to communicate with UE 104. When gNB 80 operates in millimeter wave or near-millimeter wave frequencies, the gNB can be referred to as a millimeter wave base station. Millimeter wave base station 180 can utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 can each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0050] The base station 180 may transmit beamformed signals in one or more transmit directions 182′ to the UE 104. The UE 104 may receive beamformed signals from the base station 180 in one or more receive directions 182″. The UE 104 may also transmit beamformed signals in one or more transmit directions to the base station 180. The base station 180 may receive beamformed signals in one or more receive directions from the UE 104. The base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each base station 180 / UE 104. The transmit and receive directions of the base station 180 may be the same or different. The transmit and receive directions of the UE 104 may be the same or different.

[0051] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as the entry point for content providers' MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts specific services, and may be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0052] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 191 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transported through the UPF 195. The UPF 1955 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 1970 may include the Internet, the intranet, the IP multimedia subsystem (IMS), packet switched (PS) streaming (PSS) services, and / or other IP services.

[0053] A base station may include and / or be referred to as a gNB, Node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver functionality, basic service set (BSS), extended service set (ESS), transmit receive point (TRP), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a medical device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some UEs 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices, such as in a device constellation arrangement. One or more of these devices may access a network together and / or individually.

[0054] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG28 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A 、 Figure 2CIn the example provided, it is assumed that the 5G NR frame structure is TDD, where subframe 4 is configured as slot format 28 (mostly DL), where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 is configured as slot format 1 (all UL). Although subframes 3 and 4 are shown in slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are both DL and UL, respectively. The other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The UE is configured with the slot format (dynamically through DL control information (DCI) or semi-statically / statically through radio resource control (RRC) signaling) via the received slot format indicator (SFI). Note that the following description also applies to the 5G NR frame structure for TDD.

[0055] Figures 2A to 2D The frame structure is shown, and various aspects of the present disclosure may be applicable to other wireless communication technologies, which may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include a mini-slot, which may include 7, 4, or 2 symbols. Depending on whether the cyclic prefix (CP) is normal or extended, each time slot may include 14 or 12 symbols. For a normal CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbols on the DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) extended OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of slots within a subframe is based on the CP and numerology. The numerology defines the subcarrier spacing (SCS), effectively defining the symbol length / duration, which is equal to 1 / SCS.

[0056]

[0057] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Therefore, for normal CP and parameter set μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing can be equal to 2 μ*15kHz, where μ is a parameter from 0 to 4. Therefore, the subcarrier spacing is 15kHz for parameter set μ=0 and 240kHz for parameter set μ=4. Symbol length / duration is inversely proportional to the subcarrier spacing. Figure 2A-2D An example of a normal CP with 14 symbols per slot and a parameter set μ=2 with 4 slots per subframe is provided. The slot duration is 0.25ms, the subcarrier spacing is 60kHz, and the symbol duration is approximately 16.67μs. Within a frame set, there can be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0058] The resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also called a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0059] like Figure 2A As shown, some REs carry reference (pilot) signals (RS) for the UE. RSs may include demodulation RSs (DM-RSs) (indicated as R for one specific configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs) for channel estimation at the UE. RSs may also include beamforming RSs (BRSs), beam refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

[0060] Figure 2BExamples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE groups (REGs), each REG comprising 12 consecutive REs in an OFDM symbol of an RB. The PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring opportunity on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of the frame. The UE 104 uses the PSS to determine subframe / symbol timing and physical layer identification. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of the frame. The UE uses the SSS to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also known as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as the system information block (SIB)), and paging messages.

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

[0062] Figure 2DAn example of various UL channels within a subframe of a frame is shown. The PUCCH may be positioned as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) information (ACK / negative ACK (NACK)) feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0063] Figure 3 is a block diagram of a first wireless device 310 communicating with a second wireless device 350 in an access network. In some examples, the first wireless device 310 may be a base station communicating with a UE (e.g., the second wireless device 350). In other examples, the first wireless device 310 or the second wireless device 350 may be an IAB node. For example, the first wireless device 310 may be an IAB node, and the second wireless device 350 may be a child node or a UE. In other examples, the first wireless device 310 may be a base station, and the second wireless device 350 may be an IAB node. In the DL, IP packets from the EPC 160 may be provided to the controller / processor 375. The controller / processor 370 implements Layer 3 and Layer 2 functionality. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Medium Access Control (MAC) layer. The controller / processor 375 provides broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs into transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0064] The transmit (TX) processor (e.g., TX processor 316) and receive (RX) processor (e.g., RX processor 370) implement layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, can include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be separated into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes and for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the second wireless device 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318 may modulate an RF carrier with a corresponding spatial stream for transmission.

[0065] At the second wireless device 350, each receiver 354RX receives a signal via its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to the RX processor 356. The TX processor 368 and the RX processor 366 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the second wireless device 350. If multiple spatial streams are destined for the second wireless device 350, the RX processor 366 can combine them into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation point transmitted by the first wireless device 310. These soft decisions can be based on the channel estimate calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the first wireless device 310. The data and control signals are then provided to the controller / processor 359, which performs layer 3 and layer 2 functions.

[0066] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 369 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0067] Similar to the functions described in conjunction with the DL transmission of the first wireless device 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data SDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing MAC SDUs to TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

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

[0069] UL transmissions are processed at the first wireless device 310 in a manner similar to that described in conjunction with the receiver functionality at the second wireless device 350. Each receiver 318RX receives a signal through its corresponding antenna 320. Each receiver 328RX recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0070] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the second wireless device 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0071] At least one of the TX processor 368, the RX processor 356 and the controller / processor 359 and / or the TX processor 316, the RX processor 370 and the controller / controller 375 may be configured to perform operations related to Figure 1 Various aspects related to the full-duplex beam searching component 198.

[0072] Figure 4 4 is a diagram 400 showing a first device 402 in communication with a second device 404. Figure 4 , the first device 404 can transmit beamformed signals (generally referred to herein as "M beams") in one or more directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d to the second device 414. The second device 404 can receive beamformed signals (generally referred to herein as "N beams") from the first device 402 in one or more receive directions 408a, 408b, 409a, 409b. The second device 404 can also transmit beamformed signals in one or more of the directions 408a, 408b, 409a, 409b to the first device 402. The first device 402 can receive beamformed signals from the second device 404 in one or more receive directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d. The first device 402 and the second device 404 can perform beam training to determine the optimal receiving and transmitting directions for each of the first device 402 and the second device 414. The transmitting and receiving directions of the first device 404 can be the same or different. The transmitting and receiving directions of the second device 404 can be the same or different.

[0073] As used herein, a beam pair link (BPL) refers to a pair of transmit beams and receive beams. For example, a first BPL may include a pair of transmit direction 406c and receive direction 408b, and a second BPL may include a pair of transmit direction 409a and receive direction 407c.

[0074] exist Figure 4In the illustrated example, first device 402 includes a first set of antennas 410a and a second set of antennas 410b, and second device 404 includes a first set of antennas 412a and a second set of antennas 412b. In the illustrated example, each set of antennas 410a, 410b, 412a, 412b is associated with a subset of the receive and transmit directions associated with first device 402 / second device 404, respectively. For example, first device 402's first set of antennas 410a is associated with receive and transmit directions 406a, 406b, 406c, 406d, and first device 404's second set of antennas 410b is associated with receive and transmit directions 407a, 407b, 407c, 407d. Furthermore, second device 404's first set of antennas 412a is associated with receive and transmit directions 408a, 408b, and second device 404's second set of antennas 412b is associated with receive and transmit directions 409a, 409b. In some examples, an antenna set may correspond to an antenna panel or an antenna array. In some examples, an antenna set may correspond to a transmit receive point (TRP).

[0075] Although shown as separate antenna sets, in other examples, the antenna sets 410a, 410b of the first device 402 and / or the antenna sets 412a, 412b of the second device 404 can be part of the same antenna set. For example, the first set of antennas 412a and the second set of antennas 412b of the second device 404 can be implemented by the same antenna panel or the same antenna array.

[0076] exist Figure 4 In the example shown, the first device 402 can be implemented by a base station (such as base station 102 / 180, first wireless device 310 and / or second wireless device 350) or a distributed unit (DU) node of an integrated access and backhaul (IAB) device. Various aspects of the second device 404 can be implemented by a UE (such as UE 104, first wireless device 310 and / or second wireless device 350) or a mobile terminal (MT) node of an IAB device.

[0077] In some examples, one or both of devices 402, 404 may be capable of full-duplex operation. For example, the second device 404 may be capable of using one or more receive directions 408a, 408b, 409a, 409b (or beams) to receive downlink messages while also being able to use one or more transmit directions 408a, 408b, 409a, 409b (or beams) to send uplink messages. When full-duplex operation is implemented, it is beneficial for the device to minimize self-interference. Self-interference may occur when a transmit signal leaks into a receiver port of a device. In some examples, for example, when a transmit signal is reflected (e.g., by an object) back to a receiver port of a device (sometimes referred to as a "clutter echo"), the device may experience self-interference.

[0078] Some example techniques for reducing self-interference include implementing spatial isolation. For example, receive and transmit beams can be selected to reduce signal leakage and / or the occurrence of clutter echoes. For example, a receive beam can be selected from a first set of antennas 412a of the second device 404, and a transmit beam can be selected from a second set of antennas 412b. In some examples, the device can employ self-isolation cancellation techniques in the analog and / or digital domains.

[0079] In some examples, although a device may be configured to perform full-duplex operation, in some circumstances the device may not be able to perform full-duplex communication. For example, the device may determine that due to self-interference, the device cannot simultaneously transmit and receive communications. In some examples, to determine whether full-duplex communication is possible, the device may perform self-interference measurements. For example, while transmitting signals using a first set of antennas, the device may measure received signals on a second set of antennas. In some such examples, the received signals may be due to leaked transmitted signals and / or clutter echoes.

[0080] In some examples, a wireless device may autonomously (e.g., without receiving instructions from another device) perform self-interference measurements. For example, when a base station (or DU node) transmits a downlink signal (or downlink set) (e.g., SSB, CSI-RS, PT-RS, etc.) using one or more transmit beams or directions, the base station may perform measurements on any signals received in one or more receive beams or directions. For example, the first device 402 may transmit a set of downlink reference signals using one or more transmit directions 406a, 406b, 406c, 406d (or beams) of the first set of antennas 410a, and / or measure the reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-noise ratio (SNR), and / or signal-to-interference-plus-noise ratio (SINR) of signals received using one or more receive directions 407a, 407b, 407c, 407d (or beams) of the second set of antennas 410b.

[0081] In some examples, when a UE (or MT node) is scheduled to transmit an uplink signal (e.g., an SRS), the UE may perform measurements of any signal received in one or more receive beams or directions. For example, the second device 404 may transmit a set of uplink signals (e.g., an SRS, etc.) using one or more transmit directions 408a, 408b (or beams) of a first set of antennas 412a, and measure the quality (e.g., RSRP, RSRQ, SNR, and / or SINR) of the signals received using one or more receive directions 409a, 409b (or multiple beams) of a second set of antennas 412b.

[0082] In some examples, the network can facilitate the performance of self-interference measurements. For example, a first device 402 (e.g., a base station or DU node) can provide configuration and / or resources to a second device 404 (e.g., a UE or MT node) to perform self-interference measurements. In some examples, the first device 402 can configure the second device 404 to provide a report of the self-interference measurements performed. In some examples, the first device 402 can determine full-duplex capabilities, conditions for performing full-duplex communication, and / or performance of the second device 404 based on the received report.

[0083] Figure 5 9 through 9 illustrate example communication systems for implementing full-duplex communications using at least one full-duplex capable device.

[0084] Figure 5 A communication system 500 is shown including a first device 502 in communication with a second device 504. Various aspects of the second device 504 may be implemented by Figure 4 For example, the second device 504 may be implemented by a base station or a DU node of an IAB device. Figure 5 In the example shown, the second device 504 includes a first TRP (TRP1) 504a and a second TRP (TRP2) 505b. For example, the first TRP 504a can be implemented by the first set of antennas 410a of the first device 402, and the second TRP 504b can be implemented by the first set of antennas 410a of the first device 402. Figure 4 The second set of antennas 410b of the second device 404 are implemented. Various aspects of the first device 502 can be implemented by Figure 4 The first device 502 may be implemented by the second device 404. For example, the first device 502 may be implemented by a UE or an MT node.

[0085] exist Figure 5In the example shown, at least the first device 502 is capable of full-duplex communication. For example, the first device 502 can receive a downlink signal 510 from a first TRP 504a while also transmitting an uplink signal 512 to a second TRP 504. The exemplary second device 504 can be capable of half-duplex communication (e.g., capable of transmitting or receiving, but not simultaneously) or full-duplex communication.

[0086] Figure 6 A communication system 600 is shown including a first device 602 in communication with a second device 604a and a third device 604b. Various aspects of the first device 602 may be provided by Figure 4 For example, the first device 604 may be implemented by a base station or a DU node of an IAB device. Various aspects of the second device 604a and the third device 604b may be implemented by Figure 4 The second device 404 is implemented by the second device 404. For example, the second device 604b can be implemented by a UE or an MT node.

[0087] exist Figure 6 In the example shown, at least the first device 602 is capable of full-duplex communication. For example, the first device 602 can transmit a downlink signal 610 to the second device 604a while also receiving an uplink signal 612 from the third device 604b. The second device 604a and the third device 604b can be capable of half-duplex communication or full-duplex communication.

[0088] Figure 7A and Figure 7B Communication systems 700 and 750 are shown, respectively, including first devices 702a and 702b communicating with second devices 704a and 704b. Various aspects of the second devices 704a and 704b can be implemented by Figure 4 For example, the second devices 704a and 704b may be implemented by a base station or a DU node of an IAB device. Figure 4 For example, the first devices 702a and 702b may be implemented by MT nodes of UE or IAB devices. Figure 7A In the example shown, the first device 702a is implemented by a UE and the second device 704a is implemented by a base station. Figure 7B In the illustrated example, the first device 702b is implemented by an MT node (eg, the IAB device 752), and the second device 704b is implemented by a DU node (eg, the IAB device 704).

[0089] exist Figure 7A and Figure 7BIn the example shown, the first device 702a, 702b and the second device 704a, 704b are each capable of full-duplex communication. Figure 7A A second device 704a (eg, a base station) may transmit downlink signals 710 using a first set of transmit beams or directions while also receiving uplink signals 702 using a second set of receive beams or directions. Figure 7A A first device 702a (eg, UE) may receive downlink signals 710 using a first set of receive beams or directions while also transmitting uplink signals 702 using a second set of transmit beams or directions.

[0090] exist Figure 7B In the example shown, a second device 704b (e.g., a DU node) can transmit downlink signals 720 using a first set of transmit beams or directions while also using a second set of receive beams or directions to receive uplink signals 722. A first device 702b (e.g., an MT node) can receive downlink signals 720 using a first set of receive beams or directions while also using a second set of transmit beams or directions to receive uplink signals 722.

[0091] Figure 8 A communication system 800 is shown including parent nodes 802a, 802b in communication with a wireless device 804. Various aspects of the parent nodes 802b, 802a may be implemented by Figure 4 For example, one or both of the parent nodes 802 and 802b may be implemented by a base station and / or a DU node of an IAB device. Figure 4 The wireless device 808 may be implemented by the second device 404. For example, the wireless device 808 may be implemented by a UE or an MT node.

[0092] exist Figure 8 In the example shown, wireless device 804 is dual-connected to parent nodes 802a and 802b. In some examples, the connection between wireless device 804 and first parent node 802a and the connection between wireless device 802 and second parent node 802b can be in the same frequency band.

[0093] exist Figure 8 In the example shown, at least wireless device 804 is capable of full-duplex communication. For example, wireless device 804 can receive a downlink signal 810 from a first parent node 802a while also transmitting an uplink signal 802 to a second parent node 802b. It will be appreciated that one or both of parent nodes 802a, 802b can be capable of half-duplex communication or full-duplex communication.

[0094] Figure 9A and Figure 9B900 and 950 are shown, respectively, including a parent node 902, an IAB device 904, and child nodes 906a and 906b. Figure 4 The parent node 904 may be implemented by a base station and / or a DU node of an IAB device. Figure 4 The second device 404 is implemented. For example, one or both of the sub-nodes 908a and 908b may be implemented by a UE or an MT node.

[0095] exist Figure 9A and Figure 9B In the example shown, the IAB device 904 includes an MT node 904a and a DU node 904b. The MT node 904a can send a communication 910 (e.g., Figure 9A ), or may receive communication 920 from parent node 904 (as in Figure 9B DU node 904b may receive communications 912 (as shown in FIG. Figure 9A ), or the communication 922 may be sent to one or both of the child nodes 904a, 904b (as shown). Figure 9B shown).

[0096] In some examples, the MT node 904a may be associated with a first set of antennas, such as Figure 4 The second device 404 may have an exemplary first set of antennas 412a, and the DU node 904b may be associated with a second set of antennas, such as Figure 4 An exemplary second set of antennas 410b of the first device 402.

[0097] exist Figure 9A and Figure 9B In the example shown, the IAB device 904 is capable of full-duplex communication. Figure 9A In the example shown, the DU node 904b of the IAB device 904 may send communications 910 to the parent node 902 while the MT node 904a of the IAB device 914 also receives communications 912 from one or both of the child nodes 906a, 906b. Figure 9B In the example shown, the DU node 904b of the IAB device 904 can receive communication 920 from the parent node 902, while the MT node 904a of the IAB device 904 can also send communication 922 to one or both of the child nodes 906a, 906b. The parent node 902, the first child node 906a, and / or the second child node 906 can perform half-duplex communication or full-duplex communication.

[0098] As described above, to operate in full-duplex mode, the device uses one or more transmit beams or directions for transmitting signals and also uses one or more receive beams or directions for receiving signals. For example, the device may identify two or more beams that can be used for communication and that can also be used for full-duplex communication at the device and / or other devices. In some examples, the device may determine the two or more beams that can be used for communication by comparing the signal qualities of the multiple beams (e.g., measured RSRP, measured RSRQ, measured SNR, and / or measured SINR) to a quality threshold and selecting those beams with measured signal qualities that meet the quality threshold. In some examples, the device may then determine which of the two or more beams determined to be capable of communication are also capable of full-duplex communication. In some examples, the device may determine that a beam is capable of full-duplex communication based on self-interference measurements and / or cross-link interference measurements. Cross-link interference may refer to a situation where two devices are relatively close and / or overlapping in a beam, such as relative to a beam. Figure 8 The parent nodes 802a and 802b are as follows.

[0099] To facilitate full-duplex communication, example techniques disclosed herein enable a wireless device to reduce the number of beams that may be processed to determine full-duplex communication. For example, the disclosed techniques enable identifying a first beam candidate and then prioritizing searching a subset of beam candidates that are capable of full-duplex communication relative to the first beam candidate (e.g., a second beam candidate in the subset of beam candidates that can be used for communication while also using the first beam candidate). It will be appreciated that the first beam candidate may refer to one or more beam candidates.

[0100] For example, the wireless device may identify a first BPL that includes a receive beam or direction of the wireless device and a transmit beam or direction of the transmitting wireless device. Figure 4In the illustrated example, second device 404 may identify a first BPL that includes transmit direction 406c (or beam) of first device 402 and receive direction 408b (or beam) of second device 414. Second device 404 may then prioritize searching for a subset of BPLs that are capable of full-duplex communication with the first BPL. For example, receive directions 408a, 408b (or beams) associated with antennas 412a of the first set may not be usable for full-duplex communication with transmit directions 409a, 409b (or beams) associated with antennas 412b of the second set. In some such examples, upon determining that the first BPL includes receive beam or direction 408b, second device 404 may prioritize searching for transmit beams or directions 409a, 409b of antennas 412b of the second set that are usable for communication and that are also capable of full-duplex communication. In this manner, the disclosed techniques enable wireless devices, such as second device 404, to reduce the number of beams or directions that are searched to identify a second BPL after identifying the first BPL.

[0101] Although the above description provides an example in which the second device 404 uses a receive beam or direction associated with the first BPL to preferentially search for the second BPL, in other examples, the second device 414 may additionally or alternatively use a transmit beam or direction associated with the first BPL to preferentially search for the second BPL. For example, the first device 402 may allocate different transmit directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d (or beams) for transmitting different reference signals. In some such examples, the second device 404 can use the transmit beam or direction of the first BPL (e.g., the transmit direction 406c used by the first device 402 to transmit a downlink reference signal) to determine a subset of the receive directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d (or beams) of the first device 402 and / or a subset of the transmit directions 408a, 408b, 409a, 409b (or beams) of the second device 404 for full-duplex communication with the first BPL.

[0102] Furthermore, although the above description provides an example in which the second device 404 performs identification of the first BPL and the second BPL for full-duplex communication, in other examples, the first device 402 may additionally or alternatively perform identification of the first BPL and the second BPL for full-duplex communication.

[0103] Figure 10 An example wireless communication flow 1000 is shown between a first wireless device 1002 and a second wireless device 1004 as presented herein. Figure 10In the illustrated example of FIG, the wireless communication flow 1000 may be performed by a UE having full duplex capability or a MT node having full duplex capability (e.g., a UE having full duplex capability) in communication with a base station or DU node including two antenna sets. Figure 5 ), in an exemplary communication system 500 of FIG. 5 , a full-duplex capable UE or a full-duplex capable MT node (e.g., Figure 7A and Figure 7B The exemplary communication systems 700, 750) facilitate full-duplex communication.

[0104] One or more aspects of the second wireless device 1004 may be provided by Figure 1 Base station 102 / 180, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4 The first device 402, Figure 5 The second device 504 and / or Figure 7A and Figure 7B One or more aspects of the first wireless device 1002 may be implemented by the second device 704a, 704b. Figure 1 UE 104, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4 The second device 404, Figure 5 The first device 502 and / or Figure 7A and Figure 7B The first device 702a, 702b is implemented.

[0105] although Figure 10 The wireless communication flow 1000 includes a first wireless device 1002 communicating with a second wireless device 1004, but in additional or alternative examples, the first wireless device 100 can communicate with any suitable number of base stations, DU nodes, UEs, and / or MT nodes, and / or the second wireless device 1004 can communicate with any suitable number of base stations, DU nodes, UEs, and / or MT nodes. Thus, although certain transmissions between the first wireless device 1002 and the second wireless device 1004 are described as uplink transmissions and downlink transmissions, in other examples, any transmission can additionally or alternatively be a sidelink transmission.

[0106] exist Figure 10In the illustrated example, the second wireless device 1004 transmits a reference signal 1010 that is received by the first wireless device 1002. The reference signal 1010 may include a reference signal set. For example, the reference signal 1010 may include any suitable combination of one or more SSBs, one or more CSI-RSs, and / or one or more PT-RSs (e.g., for a downlink reference signal set) or one or more SRSs (e.g., for an uplink reference signal set). In some examples, the second wireless device 1004 may transmit the reference signal 1010 using different transmit beams or directions.

[0107] At 1020, the first wireless device 1002 measures the reference signal 1010 on the receiver side beam. For example, the first wireless device 1002 may Figure 4 The quality measurement of the reference signal 1010 is performed on one or more receive directions 408a, 408b, 409a, 409b (or beams). In some examples, the quality measurement may include measuring RSRP, RSRQ, SNR, and / or SINR of the reference signal 1010 on one or more receive directions 408a, 408b, 409a, 409b (or beams).

[0108] At 1030, the first wireless device 1002 selects a first BPL based on the measurement results (e.g., at 1020). For example, the first wireless device 1002 may select a pair of beams or directions having a quality measurement (e.g., measured RSRP, measured RSRQ, measured SNR, and / or measured SINR) that meets a quality threshold, including a transmit beam or direction of the second wireless device 1004 (e.g., one of the directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d (or beams)) and a receive beam or direction of the first wireless device 1002 (e.g., one of the directions 408a, 408b, 409a, 409b (or beams)). The first BPL may include a set of one or more BPLs.

[0109] In some examples, the first wireless device 1002 can send a report 1040 that is received by the second wireless device 1004. The report 1040 can include the first BPL (e.g., selected at 1030). In some examples, the report 1040 can include information about candidate BPLs that can communicate in full duplex with the first BPL. In such examples, the candidate BPLs may not have been evaluated (e.g., at 1062) and therefore may not be available for communication. In some examples, the report 1040 can include information about ineligible BPLs that cannot be used for full duplex communication with the first BPL.

[0110] In some examples, the second wireless device 1004 can send relationship information 1050 that is received by the first wireless device 1002. The relationship information 1050 can include information that enables the first wireless device 1002 to determine a subset of BPLs to evaluate (e.g., at 1060 and 1062) rather than evaluating the full set of candidate BPLs available to the first wireless device 1002.

[0111] In some examples, the relationship information 1050 may include information about beams or directions with full-duplex capabilities (e.g., beams or directions that facilitate full-duplex communication). For example, the relationship information 1050 may include information about which reference signal is assigned to which antenna set (e.g., assigned to different TRPs, different antenna arrays, different antenna panels, etc.).

[0112] In some examples, the relationship information 1050 may include information about which reference signals are full-duplex capable. For example, the relationship information 1050 may indicate that the first set of reference signals is capable of full-duplexing with the second set of reference signals. In such an example, if the first wireless device 1002 selects a first BPL based on the first set of reference signals (e.g., at 1030), the first wireless device 100 may select a subset of BPLs to evaluate based on the second set of reference signals (e.g., at 1060 and 1062).

[0113] In some examples, relationship information 1050 may include general information regarding full-duplex capable beams or directions. For example, relationship information 1050 may include a first set of transmit beams and directions that are capable of full-duplexing with a second set of transmit beams or directions. In some examples, relationship information 1050 may be based on report 1040. For example, relationship information 1040 may identify a subset of BPLs that are capable of full-duplexing with a first BPL included in report 1040.

[0114] At 1060, the first wireless device 1002 determines a set of BPLs based on the first BPL. For example, the first wireless device 1002 may use the transmitter-side beam or direction and / or the receiver-side beam or direction of the first BPL to determine a set of BPLs having transmitter-side beams or directions and / or receiver-side beams or directions capable of full-duplexing with the first BPL. The set of BPLs may include one or more BPLs.

[0115] In some examples, the first wireless device 1002 can use the receiver-side beams or directions of the first BPL (e.g., the receive beams or directions of the first wireless device 1002) to determine a set of BPLs. For example, the first wireless device 1002 can determine a set of transmit directions 408a, 408b, 409a, 409b (or beams) that can be full-duplexed with the receive beams or directions of the first BPL. For example, the first wireless device 1002 can determine that the receive beams or directions are associated with the first set of antennas 412a of the first wireless device 1002, and determine a subset of transmit beams or directions associated with the second set of antennas 412b.

[0116] In some examples, the first wireless device 1002 can use the transmitter-side beam or direction of the first BPL (e.g., the transmit beam or direction of the second wireless device 1004) to determine a set of BPLs. For example, the first wireless device 1002 can use the transmit beam or direction of the second wireless device 1004 of the first BPL to determine a set of receive directions 408a, 408b, 409a, 409b (or beams) that can be full-duplexed with the transmit beam or direction of the first BPL, and / or can determine a set of transmit directions 408a, 408b, 409a, 409b (or beams) that can be full-duplexed with the receive beam or direction of the first BPL.

[0117] In some examples, the first wireless device 1002 can determine a set of BPLs using the relationship information 1050. For example, the first wireless device 1002 can determine a set of BPLs using the relationship information 1050 by identifying a set of beams or directions that satisfy the relationship information 1050 based on the first BPL.

[0118] In some examples, the relationship information 1050 may include information about a set of BPLs that can communicate in full duplex with the first BPL. For example, the second wireless device 1004 may send the relationship information 1050 based on the report 1040 including the first BPL. The first wireless device 1002 may use the relationship information 1050 to determine a subset of BPLs accordingly.

[0119] Although Figure 10 The example shows that the second wireless device 1004 sends the relationship information 1050 after receiving the report 1040. In other examples, the second wireless device 1004 can send the relationship information 1050 before receiving the report 1040. For example, the second wireless device 1004 can provide the relationship information 1050 (e.g., general relationship information) to the first wireless device 1002 when establishing a connection with the first wireless device 1002 and / or can use the relationship information 1050 to reconfigure the first wireless device 1002 after the connection is established.

[0120] At 1062, the first wireless device 1002 performs measurements on the set of BPLs. For example, the first wireless device 1002 may perform RSRP measurements, RSRQ measurements, SNR measurements, and / or SINR measurements on the set of BPLs (eg, the set of BPLs determined at 1060).

[0121] At 1070, the first wireless device 1002 selects a second BPL based on the evaluation (e.g., at 1062). For example, the first wireless device 1002 may select a pair of beams or directions, including a receive beam or direction of the second wireless device 1004 (e.g., one of the directions 406a, 406b, 406c, 406d, 407a, 407b, 407c, 407d (or beams)) having a quality measurement that meets a quality threshold (e.g., measured RSRP, measured RSRQ, measured SNR, and / or measured SINR) and a transmit beam or direction of the first wireless device 1002 (e.g., one of the directions 408a, 408b, 409a, 409b (or beams)). The second BPL may include a set of one or more BPLs.

[0122] In some examples, the first wireless device 1002 can send a report 1080 that is received by the second wireless device 1004. The report 1080 can include the first BPL (e.g., selected at 1030) and / or the second BPL (e.g., selected at 1070). In some examples, the report 1080 can include additional or alternative candidate BPLs that can be used for full-duplex communication. In some examples, the report 1080 can include additional or alternative ineligible BPLs that are not full-duplex capable as the first BPL.

[0123] exist Figure 10 In the illustrated example, the first wireless device 1002 performs full-duplex communication with the second wireless device 1004. For example, the first wireless device 1002 can receive a first message 1090 from the second wireless device 1004 using a first BPL. The first wireless device 1002 can also send a second message 1092 using a second BPL, which is received by the second wireless device 1004.

[0124] The reception of the first message 1090 and the transmission of the second message 1092 may be performed simultaneously (or nearly simultaneously) such that the first wireless device 1002 is employing full-duplex communications.

[0125] Figure 11 An example wireless communication flow 1100 is shown between nodes 1104a, 1104b and a wireless device 1102 as presented herein. In some examples, the wireless communication flow 1100 may facilitate full-duplex communication (e.g., a UE or MT node with full-duplex capability) by having dual connectivity with a first node 1104a and a second node 1104b. Figure 8 One or more aspects of nodes 1104a, 1104b may be implemented by Figure 1 Base station 102 / 180, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4 The first device 402 and / or Figure 8 One or more aspects of the wireless device 1102 may be implemented by the parent nodes 802a, 802b. Figure 1 UE 104, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4 The second device 404 and / or Figure 8 The wireless device 804 is implemented.

[0126] exist Figure 11 In the illustrated example, the first node 1104a transmits a reference signal 1110 for reception by the wireless device 1102. The reference signal 1110 may include a reference signal set. For example, the reference signal 1110 may include any suitable combination of one or more SSBs, one or more CSI-RSs, and / or one or more PT-RSs (e.g., for a downlink reference signal set) or one or more SRSs (e.g., for an uplink reference signal set). In some examples, the first node 1104a may transmit the reference signal 1110 using different transmit beams or directions.

[0127] At 1120, the wireless device 1102 performs measurements on the reference signal 1110 on the receiver side beam. For example, the wireless device 1102 may Figure 4 The quality measurement of the reference signal 1110 is performed on one or more receive directions 408a, 408b, 409a, 409b (or beams). In some examples, the quality measurement may include measuring RSRP, RSRQ, SNR, and / or SINR of the reference signal 1110 on one or more receive directions 408a, 408b, 409a, 409b (or beams).

[0128] At 1130, the wireless device 1102 selects a first BPL based on the measurement results (e.g., at 1120). For example, the wireless device 1102 can use quality measurements (e.g., measured RSRP, measured RSRQ, measured SNR, and / or measured SINR) that meet a quality threshold to select a pair of beams or directions, including a transmit beam or direction of the first node 1104a and a receive beam or direction of the wireless device 1102. The first BPL can include a set of one or more BPLs.

[0129] In some examples, the wireless device 1102 may send a report 1140a received by the first node 1104a and / or may send a report 1100b received by the second node 1104b. The reports 1140a, 1140b may include a first BPL (e.g., selected at 1130). In some examples, the reports 1140a, 1140b may include information about candidate BPLs associated with the second node 1104b that are capable of full-duplexing with the first BPL associated with the first node 1104a. In such examples, the candidate BPLs may not have been evaluated (e.g., at 1162) and therefore may not be available for communication. In some examples, the reports 1140a, 1140b may include information about candidate BPLs associated with the second node 1104b that have cross-link interference with the first BPL that is less than an interference threshold. In some examples, the reports 1140a, 1140b may include information regarding a non-conforming BPL associated with the second node 1104b (eg, a BPL that cannot be used for full-duplex communication with a first BPL associated with the first node 1104a).

[0130] In some examples, the first node 1104a may send relationship information 1150a, which is received by the wireless device 1102, and / or the second node 1104b may send relationship information 1150b, which is received by the wireless device 1102. The relationship information 1150a, 1150b may include information that enables the wireless device 1102 to determine a set of BPLs associated with the second node 1104b for evaluation (e.g., at 1160 and 1162), rather than evaluating the full set of candidate BPLs available to the wireless device 1102.

[0131] In some examples, the relationship information 1150a, 1150b may include information about beams or directions with full duplex capability. For example, the relationship information 1150a, 1150b may identify a set of transmit beams or directions of wireless device 1101 that are full duplex capable with a set of receive beams or directions of wireless device 1102. In some examples, the relationship information 1150a, 1150b may include information about which reference signal is assigned to which antenna set (e.g., assigned to different TRPs, different antenna arrays, different antenna panels, etc.).

[0132] In some examples, the relationship information 1150a, 1150b may include information about which reference signals are full-duplex capable. For example, the relationship information 1150a, 1150b may indicate that the first set of reference signals is capable of full-duplexing with the second set of reference signals. In such an example, if the wireless device 1102 selects a first BPL based on the first set of reference signals (e.g., at 1130), the wireless device 1104 may select a set of BPLs to evaluate based on the second set of reference signals (e.g., at 1160 and 1162).

[0133] In some examples, the relationship information 1150a, 1150b may include general information about full-duplex capable beams or directions. For example, the relationship information 1150a, 1150b may include a first set of transmit beams and directions that are capable of full-duplexing with a second set of transmit beams or directions. In some examples, the relationship information 1150a, 1150b may be based on reports 1140a, 1140b. For example, the relationship information 1150a, 1150b may identify a set of BPLs that are capable of full-duplexing with the first BPL. In some examples, the relationship information 1150a, 1150b may identify one or more ineligible BPLs that are unable to full-duplex with the first BPL. In some examples, a candidate BPL may be disqualified when the cross-link interference associated with the candidate BPL and the first BPL does not meet an interference threshold (e.g., the cross-link interference is greater than the interference threshold).

[0134] At 1160, the wireless device 1102 determines a subset of BPLs associated with the second node 1104b based on the first BPL. For example, the wireless device 1102 can use the transmit beam or direction and / or receive beam or direction of the first BPL associated with the first node 1104a to determine a set of BPLs associated with the second node 1104b that have transmitter-side beams or directions and / or receiver-side beams or directions capable of full-duplexing with the first BPL. In some examples, the wireless device 1102 can use the receiver-side beam or direction of the first BPL (e.g., the receive beam or direction of the wireless device 1002) to determine the set of BPLs. For example, the wireless device 1102 can determine a set of transmit directions 408a, 408b, 409a, 409b (or multiple beams) associated with the second node 1104b that can perform full-duplexing with the receive beam or direction of the first BPL. For example, the wireless device 1102 may determine that the receive beams or directions of the first BPL are associated with the first set of antennas 412a of the wireless device 1102 and determine a set of transmit beams or directions associated with the second set of antennas 412b.

[0135] In some examples, the wireless device 1102 can use the transmitter-side beam or direction of the first BPL (e.g., the transmit beam or direction of the first node 1104a) to determine a set of BPLs associated with the second node 1104b. For example, the wireless device 1102 can use the transmit beam or direction of the first BPL associated with the first node 1104a to determine a set of receive directions 408a, 408b, 409a, 409b (or beams) associated with the second node 1104b that can be full-duplexed with the transmit beam or direction in the first BPL, and / or can determine a set of transmit directions 408a, 408b, 409a, 409b (or beams) associated with the second node 1104b that can be full-duplexed with the receive beam or direction of the first BPL associated with the first node 1104a.

[0136] In some examples, the wireless device 1102 can use the relationship information 1150a, 1150b to determine a set of BPLs. For example, the relationship information 1150a, 1150b can include information about a set of transmit beams or directions that can be full-duplexed with a set of receive beams or directions. The wireless device 1102 can use the relationship information 1150a, 1150b to determine a set of BPLs associated with the second node 1104b by identifying a set of beams or directions that satisfy the relationship information 1150, 1150a based on the first BPL.

[0137] In some examples, the relationship information 1150a, 1150b may include information about a set of BPLs associated with the second node 1104b that can perform full-duplex communication with the first BPL. For example, the nodes 1104a, 1104b may send the relationship information 1150a, 1150b based on the reports 1140a, 1140b, including the first BPL associated with the first node 1104b. The wireless device 1102 may use the relationship information 1150a, 1150b to determine the set of BPLs associated with the second node 1104b accordingly.

[0138] although Figure 11The example of FIG104 shows that the nodes 1104a and 1104b send the relationship information 1150a and 1150b after receiving the reports 1140a and 1140b, but in other examples, the first node 1104a can send the relationship information 1150a before receiving the report 1140a, and / or the second node 1104b can send the relationship information 1150b before receiving the report 1140b. For example, the first node 1104a can configure and / or reconfigure the wireless device 1102 using the relationship information 1150a (e.g., general relationship information) during / after establishing a connection with the wireless device 1102, and / or the second node 1104b can configure and / or reconfigure the wireless device 1102 using the relationship information 1150b during / after establishing a connection with the wireless device 1102.

[0139] At 1162, the wireless device 1102 performs measurements on the BPL set associated with the second node 1104b. For example, the wireless device 1102 may perform RSRP measurements, RSRQ measurements, SNR measurements, and / or SINR measurements on the BPLs of the BPL set (e.g., determined at 1160).

[0140] At 1170, the wireless device 1102 selects a second BPL based on the evaluation (e.g., at 1162). For example, the wireless device 1102 may use a quality measurement (e.g., measured RSRP, measured RSRQ, measured SNR, and / or measured SINR) that satisfies a quality threshold to select a pair of beams or directions, including a receive beam or direction of the second node 1104b and a transmit beam or direction of the wireless device 1102 (e.g., one of the directions 408a, 408b, 409a, 409b (or beams)). The second BPL may include a set of one or more BPLs.

[0141] In some examples, the wireless device 1102 may send a report 1180a for reception by the first node 1104a and / or may send a report 1180b for reception by the second node 1104b. The reports 1180a, 1180b may include the first BPL (e.g., selected at 1130) and / or the second BPL (e.g., selected at 1170). In some examples, the reports 1180a, 1180b may include additional or alternative candidate BPLs that may be used for full-duplex communication. In some examples, the reports 1180a, 1180b may include additional or alternative ineligible BPLs that cannot communicate in full-duplex with the first BPL.

[0142] exist Figure 11In the example shown, the wireless device 1102 performs full-duplex communication with nodes 1104a and 1104b. For example, the wireless device 1102 can receive a first message 1190 from the first node 1104a using a first BPL. The wireless device 1102 can also send a second message 1192 using a second BPL that is received by the second node 1104b.

[0143] It will be appreciated that the reception of the first message 1190 and the transmission of the second message 1192 may be performed simultaneously (or nearly simultaneously) such that the wireless device 1102 utilizes full-duplex communication.

[0144] In some examples, the wireless communication flow 1100 may facilitate full-duplex communication (e.g., Figure 6 Example communication system 600).

[0145] In some examples, Figure 11 One or more aspects of the wireless communication flow 1100 may facilitate full-duplex communication (e.g., Figure 6 For example, various aspects of the wireless device 1102 may be provided by the base station 102 / 180, the first wireless device 310 or the second wireless device 350, the first device 402, and / or Figure 6 Various aspects of the nodes 1104a, 1104b may be implemented by the UE 104, the first wireless device 310 or the second wireless device 350, the second device 404 and / or Figure 6 devices 604a, 604b.

[0146] In some such examples, a wireless device 1102 (e.g., a base station or DU node including an IAB device) Figure 6 The first device 602 may select a first BPL associated with, for example, the first node 1104a. Various aspects of selecting the first BPL associated with the first node 1104a may be similar to measuring an uplink reference signal (e.g., at 1120) and selecting the first BPL (e.g., at 1130). It will be appreciated that the uplink reference signal may include one or more uplink reference signal sets, such as an SRS.

[0147] The wireless device 1102 may then select a second BPL associated with, for example, the second node 1104 b based on the first BPL. Aspects of selecting the second BPL associated with the second node 1104 b may be similar to determining a set of BPLs based on the first BPL (e.g., at 1160), performing measurements on the set of BPLs (e.g., at 1162), and selecting the second BPL (e.g., at 1170).

[0148] In some examples, wireless device 1102 may provide a report to first node 1104a and / or second node 1104b. The report may include a first BPL associated with first node 1104a and / or a second BPL associated with second node 1104b, as described above in connection with reports 1140a and 1140b. In some examples, the report may include additional or alternative candidate BPLs that may be used for full-duplex communication. In some examples, the report may include additional or alternative ineligible BPLs that are not full-duplex capable as the first BPL.

[0149] Figure 12 An example wireless communication flow 1200 is shown between a parent node 1202, an IAB device 1204, and child nodes 1206a, 1206b as presented herein. Figure 12 In the illustrated example, wireless communication flow 1200 may facilitate full-duplex communication by a full-duplex capable IAB device communicating with a parent node and one or more child nodes (e.g., the example communication system 900 of FIG. 9 ). Figure 12 As shown, the IAB device 1204 includes a DU node 1204a in communication with a first child node 1206a and / or a second child node 1206b. The example IAB device 1204 also includes an MT node 1204b in communication with the parent node 1202. In some examples, the DU node 1204a can be associated with a first set of beams or directions (e.g., beams associated with a first set of antennas), and the MT node 1204b can be associated with a second set of beams or directions (e.g., beams associated with a second set of antennas).

[0150] One or more aspects of the parent node 1202 may be represented by Figure 1 Base station 102 / 180, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4 9. One or more aspects of the IAB device 1204 may be implemented by the IAB device 904 of FIG. 9. One or more aspects of the child nodes 1206a, 1206b may be implemented by Figure 1 UE 104, Figure 3 the first wireless device 310 or the second wireless device 350, Figure 4The second device 404 and / or Figure 9A and Figure 9B Implementation is by child nodes 906a and 906b.

[0151] In some examples, the DU node 1204a of the IAB device 1204 may select a first BPL, and the MT node 1204b may preferentially search for a second BPL for full-duplex operation based on the first BPL.

[0152] At 1210, the IAB device 1204 selects a first BPL. For example, the DU node 1204a may select a first BPL associated with one or both of the child nodes 1206a, 1206b. Figure 12 The various aspects of selecting the first BPL at 1210 may be similar to Figure 10 (e.g., at 1020) and / or Figure 11 measurement of a reference signal (e.g., at 1120), and Figure 10 (e.g., at 1030) or Figure 11 A first BPL is selected (eg, at 1130).

[0153] In the illustrated example, the IAB device 1204 may send a report 1212 that is received by the parent node 1202. The report 1212 may include the first BPL (e.g., selected at 1210). In some examples, the report 1212 may include information about candidate BPLs associated with the parent node 1202 that are capable of full-duplex communication with the first BPL associated with the child nodes 1206a, 1206b. In such examples, the candidate BPLs associated with the parent node 1202 may not have been evaluated (e.g., at 1214) and therefore may not be available for communication (e.g., with the parent node 1202). In some examples, the report 1212 may include information about ineligible BPLs associated with the parent node 1202 (e.g., BPLs that cannot be used for full-duplex communication with the first BPL associated with the child nodes 1206a, 1206b).

[0154] At 1214, the IAB device 1204 evaluates the set of BPLs based on the first BPL. For example, the MT node 1204b may be configured to determine the set of BPLs associated with the parent node 1202 based on the first BPLs associated with the child nodes 1206a, 1206b. The MT node 1204b may also be configured to perform measurements on the set of BPLs. Figure 12 Various aspects of the set of evaluation BPLs (e.g., at 1214) may be similar to Figure 10 (e.g., at 1060) and / or Figure 11 determining a set of BPLs (e.g., at 1160), and Figure 10(e.g., at 1062) and / or Figure 11 Measurements are performed (eg, at 1162).

[0155] For example, the MT node 1204b may be configured to receive a signal based on the receive beam or direction of the first BPL (eg, when the DU node 1204a receives a message from the child nodes 1206a, 1206b, as shown in FIG. Figure 9A ) or based on the transmission beam or direction of the first BPL (e.g., when the DU node 1204a sends a message to the child nodes 1208a, 1208b, as shown in FIG. Figure 9B As shown), the set of BPLs associated with the parent node 1202 that can perform full-duplexing with the first BPLs associated with the child nodes 1206a, 1206b is preferentially evaluated.

[0156] In some examples, the MT node 1204b can prioritize the set of BPLs associated with the parent node 1202 that can perform full-duplex communication with the first BPLs associated with the child nodes 1206a and 1206b based on the relationship information associated with the reference signal associated with the parent node 1202. For example, the parent node 1202 can use the relationship information to configure and / or reconfigure the IAB device 1214 during / after establishing a connection with the IAB device 1204. In some examples, the parent node 1202 can provide the relationship information based on the report 1212. Various aspects of the relationship information can be similar to Figure 10 Relationship information 1050 and / or Figure 11 relationship information 1150a, 1150b.

[0157] At 1216, the IAB device 1204 selects a BPL. For example, the MT node 1204b may select a second BPL associated with the parent node 1202. Figure 12 The various aspects of selecting the second BPL at 1216 may be similar to Figure 10 (e.g., at 1070) and / or Figure 11 Selection of a second BPL (eg, at 1170).

[0158] exist Figure 12 In the example shown, the IAB device 1204 performs full-duplex communication with the parent node 1202 and the child nodes 1206a and 1206b. For example, the DU node 1204a can use a first BPL to send a first message 1218 to the first child node 1206a and / or the second child node 1206b. The MT node 1204b can also use a second BPL to receive a second message 1220 from the parent node 1202.

[0159] It will be appreciated that the sending of the first message 1218 and the receiving of the second message 1220 may be performed simultaneously (or nearly simultaneously) such that the IAB device 1204 is utilizing full-duplex communication.

[0160] It will be appreciated that, in some examples, the IAB device 1204 may send an additional or alternative report to be received by the parent node 1202 and / or the child nodes 1206a, 1206b after selecting the second BPL (e.g., at 1216). The report may include the first BPL (e.g., selected at 1210) and / or the second BPL (e.g., selected at 1216). In some examples, the report may include additional or alternative candidate BPLs that can be used for full-duplex communication. In some examples, the report may include additional or alternative ineligible BPLs that cannot communicate in full-duplex with the first BPL.

[0161] In some examples, the MT node 1204b of the IAB device 1204 may select a first BPL, and the DU node 1204a may preferentially search for a second BPL for full-duplex operation based on the first BPL.

[0162] At 1250, the IAB device 1204 selects a first BPL. For example, the MT node 1204b may select a first BPL associated with the parent node 1202. Figure 12 The various aspects of the 1250 selection of the first BPL can be similar to Figure 10 (e.g., at 1020) and / or Figure 11 measurement of a reference signal (e.g., at 1120), and Figure 10 (e.g., at 1030) and / or Figure 11 Selection of a first BPL (eg, at 1130).

[0163] In the illustrated example, the IAB device 1204 may send reports that are received by the parent node 1202 and / or the child nodes 1206a, 1206b. For example, the MT node 1204b may send a parent report 1252 that is received by the parent node 1202. The DU node 1204a may send a child report 1254 that is received by the child nodes 1206a, 1206b. The reports 1252, 1254 may include a first BPL (e.g., selected at 1250). In some examples, the reports 1252, 1254 may include information about candidate BPLs associated with the child nodes 1206a, 1206b that are capable of full-duplex communication with the first BPL associated with the parent node 1202. In such an example, the candidate BPLs associated with the child nodes 1206a, 1206b may not have been evaluated (e.g., at 1256) and, therefore, may not be available for communication (e.g., with the child nodes 1206a, 1206b). In some examples, the reports 1252 , 1254 may include information regarding ineligible BPLs associated with the child nodes 1206 a , 1206 b (eg, BPLs that cannot be used for full-duplex communication with a first BPL associated with the parent node 1202 ).

[0164] At 1256, the IAB device 1204 evaluates a set of BPLs based on the first BPL. For example, the DU node 1204a may be configured to determine a set of BPLs associated with the child nodes 1206a, 1206b based on the first BPL associated with the parent node 1202. The DU node 1204a may also be configured to perform measurements on the set of BPLs. Figure 12 Various aspects of the BPL set (eg, at 1256) may be similar to determining Figure 10 (e.g., at 1060) and / or Figure 11 A subset of the BPL of the BPL (e.g., at 1160), and execution Figure 10 (e.g., at 1062) and / or Figure 11 (e.g., at 1162).

[0165] For example, the DU node 1204a may be based on the receive beam or direction of the first BPL (eg, when the MT node 1204b receives a message from the parent node 1202, such as Figure 9B ) or based on the transmission beam or direction of the first BPL (for example, when the MT node 1204b sends a message to the parent node 1204, as shown in FIG. Figure 9A As shown), the set of BPLs associated with the child nodes 1206a and 1206b that can perform full-duplex communication with the first BPL associated with the parent node 1201 is preferentially evaluated.

[0166] In some examples, the DU node 1204a can prioritize evaluating a set of BPLs associated with the child nodes 1206a and 1206b, and based on the relationship information associated with the reference signal associated with the parent node 1202, can be fully duplexed with the first BPL associated with the parent node 120. For example, the parent node 1202 can use the relationship information to configure and / or reconfigure the IAB device 1104 during / after establishing a connection with the IAB device 1204. In some examples, the parent node 1204 can provide the relationship information based on the parent report 1252. Various aspects of the relationship information can be similar to Figure 10 Relationship information 1050 and / or Figure 11 relationship information 1150a, 1150b.

[0167] At 1258, the IAB node 1204 selects a BPL. For example, the DU node 1204a may select a second BPL associated with the child nodes 1206a, 1206b. Figure 12 The various aspects of selecting the second BPL at 1258 may be similar to Figure 10 (e.g., at 1070) and / or Figure 11 Selection of a second BPL (eg, at 1170).

[0168] exist Figure 12 In the example shown, the IAB device 1204 performs full-duplex communication with the parent node 1202 and the child nodes 1206a and 1206b. For example, the DU node 1204a can use the second BPL to send a first message 1260 to the first child node 1206a and / or the second child node 1206b. The MT node 1204b can also use the first BPL to receive a second message 1262 from the parent node 1202.

[0169] It will be appreciated that the sending of the first message 1260 and the receiving of the second message 1262 may be performed simultaneously (or nearly simultaneously) such that the IAB device 1204 is utilizing full-duplex communication.

[0170] It will be appreciated that, in some examples, the IAB device 1204 may send a report received by the parent node 1202 and / or the child nodes 1206a, 1206b after selecting the second BPL (e.g., at 1258). The report may include the first BPL (e.g., selected at 1250) and / or the second BPL (e.g., selected at 1258). In some examples, the report may include additional or alternative candidate BPLs that can be used for full-duplex communication. In some examples, the report may include additional or alternative ineligible BPLs that cannot communicate in full-duplex with the first BPL.

[0171] Figure 131300 is a flow chart of a wireless communication method. The method may be performed by a first wireless device (e.g., Figure 15 The first wireless device may include a UE or a mobile terminal node, and the second wireless device may include a first TRP and a second TRP, a base station or a distributed unit node (as described above in conjunction with Figure 5 The method may facilitate improved cell coverage and / or increased throughput by enabling full-duplex communication at the wireless device.

[0172] The first wireless device and the second wireless device may each be capable of full-duplex operation. In some examples, the first wireless device may include a base station or a distributed unit node, the second wireless device may include a UE or a mobile terminal node, and the third wireless device may include a UE or a mobile terminal node (as described above in conjunction with Figure 6 The first wireless device may be capable of full-duplex operation. The first set of BPLs may be associated with the second wireless device, and the second set of BPLs may be associated with a third wireless device different from the second wireless device. In some examples, the first wireless device may include a UE or a mobile terminal node, and the second wireless device may include a base station or a distributed unit node (as described above in conjunction with Figure 7A and 7B The first wireless device and the second wireless device may each be capable of full-duplex operation. In some examples, the first wireless device may include a UE or a mobile terminal node, the second wireless device may include a first base station or a first distributed unit node, and the third wireless device may include a second base station or a third distributed unit node (as described above in conjunction with Figure 8 The first wireless device may be capable of full-duplex operation. The first set of BPLs may be associated with the second wireless device, and the second set of BPLs may be associated with a third wireless device different from the second wireless device. In some examples, the first wireless device may include an IAB device that includes a mobile terminal node associated with the first set of beams and a distributed unit node associated with the second set of beams (as described above in conjunction with Figure 9A and Figure 9B described above).

[0173] At 1302, a first wireless device receives a reference signal set from a second wireless device, as described above in conjunction with Figure 10 1010 and / or Figure 11 At 1302, the reference signal may be received by Figure 15 The reference signal component 1542 of the apparatus 1502 is executed. The reference signal set may include any suitable combination of one or more CSI-RS, SSB, PT-RS, or SRS.

[0174] At 1304, the first wireless device determines a first beam pair link (BPL) set based on the reference signal set, as described above in conjunction with Figure 10 1030, Figure 11 1130, Figure 12 1210 and / or Figure 12 At 1304, the determination of the BPL of the first set may be performed by Figure 15 The determining component 1544 of the device 1502 is executed.

[0175] As part of determining the first set of BPLs, the first wireless device may evaluate multiple receiver-side and / or transmitter-side beams based on a set of reference signals, and may select one or more BPLs based on receiver-side and / or transmitter-side beams that meet a quality threshold based on the evaluation.

[0176] At 1306, the first wireless device determines a second set of BPLs based on a capability of full-duplex operation with at least one BPL in the first set of BPLs, as described above in conjunction with Figure 10 1060, Figure 11 1160, Figure 12 1214 and / or Figure 12 At 1306, the determination of the BPL of the second set may be performed by Figure 15 The determining component 1544 of the device 1502 is executed.

[0177] At 1308, the first wireless device performs measurements on the second set of BPLs, as described above in conjunction with Figure 10 1062, Figure 11 1162, Figure 12 1214 and / or Figure 12 At 1308, the measurement may be performed by Figure 15 The measurement component 1546 of the device 1502 is executed.

[0178] As part of determining a second set of BPLs (e.g., at 1306) and performing measurements on the second set of BPLs (e.g., at 1308), in some examples, the first wireless device selects a first subset of multiple receiver-side beams based on at least one BPL in the first set of BPLs, wherein each receiver-side beam of the first subset of receiver-side beams is capable of full-duplex operation with a receiver-side beam of at least one BPL in the first set of BPLs, evaluates the first subset of receiver-side beams based on a reference signal set, and selects, based on the first subset of receiver-side beams, one or more BPLs that satisfy a quality threshold based on the evaluation.

[0179] In some examples, the second subset of the plurality of receiver-side beams may include a receiver-side beam of at least one of the first set of BPLs. In some examples, the first subset of receiver-side beams may be associated with a first antenna array of a first wireless device, and the second subset of receiver-side beams may be associated with a second antenna array of a second wireless device, wherein the first antenna array is different from the second antenna array.

[0180] At 1310, the first wireless device communicates using full-duplex operation by transmitting or receiving via a BPL in a first set of BPLs while also performing the other of transmitting or receiving via a BPL in a second set of BPLs, as described above in conjunction with Figure 10 News 1090, 1092, Figure 11 Messages 1190, 1192 and / or Figure 12 At 1310, communication using full-duplex operation may be performed by Figure 15 In some examples, the full-duplex communication component 1554 of the device 1502 is executed. Figure 15 The receiving component 1530 of the device 1502 can facilitate receiving the message while Figure 15 The sending component 1534 of the system 1502 can facilitate sending the message.

[0181] Figure 14 1400 is a flow chart of a wireless communication method. The method may be performed by a first wireless device (e.g., Figure 15 The first wireless device may include a UE or a mobile terminal node, and the second wireless device may include a first TRP and a second TRP, a base station or a distributed unit node (as described above in conjunction with Figure 5 The method may facilitate improved cell coverage and / or increased throughput by enabling full-duplex communication at a wireless device.

[0182] The first wireless device and the second wireless device may each be capable of full-duplex operation. In some examples, the first wireless device may include a base station or a distributed unit node, the second wireless device may include a UE or a mobile terminal node, and the third wireless device may include a UE or a mobile terminal node (as described above in conjunction with Figure 6 The first wireless device may be capable of full-duplex operation. The first set of BPLs may be associated with the second wireless device, and the second set of BPLs may be associated with a third wireless device different from the second wireless device. In some examples, the first wireless device may include a UE or a mobile terminal node, and the second wireless device may include a base station or a distributed unit node (as described above in conjunction with Figure 7A and Figure 7BThe first wireless device and the second wireless device may each be capable of full-duplex operation. In some examples, the first wireless device may include a UE or a mobile terminal node, the second wireless device may include a first base station or a first distributed unit node, and the third wireless device may be a second base station or a third distributed unit node (as described above in conjunction with Figure 8 The first wireless device may be capable of full-duplex operation. The first set of BPLs may be associated with the second wireless device, and the second set of BPLs may be associated with a third wireless device different from the second wireless device. In some examples, the first wireless device may include an IAB device that includes a mobile terminal node associated with the first set of beams and a distributed unit node associated with the second set of beams (as described above in conjunction with Figure 9A and Figure 9B described above).

[0183] At 1404, the first wireless device receives a reference signal set from the second wireless device, as described above in conjunction with Figure 10 1010 and / or Figure 11 At 1404, the reference signal may be received by Figure 15 The reference signal component 1542 of the apparatus 1502 is executed. The reference signal set may include any suitable combination of one or more CSI-RS, SSB, PT-RS, or SRS.

[0184] At 1406, the first wireless device determines a first beam pair link (BPL) set based on the reference signal set, as described above in conjunction with Figure 10 1030, Figure 11 1130, Figure 12 1210 and / or Figure 12 At 1406, the determination of the BPL of the first set may be performed by Figure 15 The determining component 1544 of the device 1502 is executed.

[0185] As part of determining the first set of BPLs, the first wireless device may evaluate a plurality of receiver-side and / or transmitter-side beams based on a set of reference signals, as shown at 1408 (e.g., as described above in conjunction with Figure 10 1020 and / or Figure 12 1120), and selecting one or more BPLs based on the receiver side and / or transmitter side beams that meet a quality threshold based on an evaluation, as shown in 1410 (e.g., as described above in conjunction with Figure 10 1030, Figure 11 1130, Figure 12 1210 and / or Figure 12 At 1408, the beam evaluation may be performed by Figure 15 The evaluation component 1550 of the device 1502 is executed. At 1410, the selection of one or more BPLs can be performed by Figure 15 The selection component 1552 of the device 1502 is executed.

[0186] At 1412, the first wireless device determines a second set of BPLs based on a capability of full-duplex operation with at least one BPL in the first set of BPLs, as described above in conjunction with Figure 10 1060, Figure 11 1160, Figure 12 1214 and / or Figure 12 At 1412, the second set of BPLs may be determined by Figure 15 The determining component 1544 of the device 1502 is executed.

[0187] At 1414, the first wireless device performs measurements on the second set of BPLs, as described above in conjunction with Figure 10 1062, Figure 11 1162, Figure 12 1214 and / or Figure 12 At 1414, the measurement may be performed by Figure 15 The measurement component 1546 of the device 1502 is executed.

[0188] As part of determining a second set of BPLs (e.g., at 1412) and performing measurements on the second set of BPLs (e.g., 1414), in some examples, the first wireless device selects a first subset of multiple receiver-side beams based on at least one BPL in the first set of BPLs, wherein each receiver-side beam of the first subset of receiver-side beams is capable of full-duplex operation with a receiver-side beam of at least one BPL in the first set of BPLs (e.g., at 1416), evaluates the first subset of receiver-side beams based on a reference signal set (e.g., at 1418), and selects, based on the first subset of receiver-side beams, one or more BPLs that satisfy a quality threshold based on the evaluation (e.g., at 1420).

[0189] In some examples, the second subset of the plurality of receiver-side beams can include receiver-side beams of at least one of the first set of BPLs. In some examples, the first subset of receiver-side beams can be associated with a first antenna array of the first wireless device, and the second subset of receiver-side beams can be associated with a second antenna array of the first wireless device, wherein the first antenna array is different from the second antenna array.

[0190] As shown in 1402, the first wireless device may receive information regarding a relationship between at least one BPL in the first set of BPLs and beams of the second subset of receiver-side beams, as described above in conjunction with Figure 10 Relationship information 1050 and / or Figure 11 At 1402, the information can be received by Figure 15 The relation component 1540 of the apparatus 1502 is executed. The first wireless device can select a first subset of receiver-side beams based on the received information (e.g., at 1416).

[0191] In some examples, as part of determining a second set of BPLs (e.g., at 1412) and performing measurements on the second set of BPLs (e.g., at 1414), the first wireless device selects a first subset of multiple transmitter-side beams based on at least one BPL in the first set of BPLs, wherein each transmitter-side beam of the first subset of transmitter-side beams is capable of full-duplex operation with a transmitter-side beam of at least one BPL in the first set of BPLs (e.g., at 1416), evaluates the first subset of transmit-side beams based on a reference signal set (e.g., at 1418), and selects, based on the first subset of transmitter-side beams, one or more BPLs that satisfy a quality threshold based on the evaluation (e.g., at 1420).

[0192] In some examples, the set of reference signals is associated with at least two transmitter-side beams. In some examples, the second subset of the plurality of transmitter-side beams may include a transmitter-side beam of at least one of the first set of BPLs. In some examples, the first subset of transmitter-side beams may be associated with a first antenna array or a first transmission path planning (TRP) of a second wireless device, and the second subset of transmitter-side beams may be associated with a second antenna array or a second transmission path planning (TRP) of the second wireless device, where the first antenna array or the first TRP is different from the second antenna array or the second TRP.

[0193] In some such examples, the first wireless device may receive information regarding a relationship between beams of a first subset of transmitter-side beams and beams of a second subset of transmitter-side beams (e.g., at 1402). Alternatively, the first wireless device may receive information regarding a relationship between at least one BPL of the first set of BPLs and beams of the second subset of transmitter-side beams. The first wireless device may select the first subset of transmitter-side beams based on the received information (e.g., at 1416).

[0194] At 1416, selection of a first subset of receiver-side / transmitter-side beams based on at least one BPL in the first set of BPLs may be performed by Figure 15 The selection component 1552 of the device 1502 is executed.

[0195] At 1418, an evaluation of a first subset of receiver-side / transmitter-side beams based on a set of reference signals may be performed by Figure 15 The evaluation component 1550 of the device 1502 is executed.

[0196] At 1420, selection of one or more BPLs based on an evaluation of satisfying a quality threshold based on a first subset of receiver-side / transmitter-side beams may be performed by Figure 15 The selection component 1552 of the device 1502 is executed.

[0197] As shown in 1422, the first wireless device may report at least one of the first set of BPLs and the second set of BPLs to the second wireless device or the control node, as described above in conjunction with Figure 10 Reports 1040, 1080, Figure 11 Reports 1140a, 1140b, 1180a, 1180b and / or Figure 12 The report 1212, 1252, 1254 is described. At 1420, the report can be Figure 15 The reporting component 1548 of the device 1502 is executed.

[0198] In some examples, the first wireless device may include a UE or mobile terminal node, the second wireless device may include a first base station or a distributed unit node, and the third wireless device may include a second base station or a distributed unit node. The first wireless device may be capable of full-duplex operation. At 1402, the first wireless device may receive relationship information between beams of a first subset of transmitter-side beams of the second wireless device and beams of a second subset of transmitter-side beams of the third wireless device. A first set of BPLs may be associated with a subset of the first subset of transmitter-side beams, and a second set of BPLs may be associated with a subset of the second subset of transmitter-side beams. At 1412, the first wireless device may determine a second set of BPLs based on the received information. In some examples, the beams of the first subset of transmitter-side beams and the beams of the second subset of transmitter-side beams may be associated with cross-link interference that satisfies an interference threshold. The first wireless device may report a third set of BPLs to the third wireless device based on the first set of BPLs (e.g., at 1422). In some examples, the third set of BPLs may include at least one of a BPL that cannot perform full-duplex operation with at least one BPL in the first set of BPLs or a BPL that cannot meet a quality threshold. In some examples, the third set of BPLs may include a BPL that can perform full-duplex operation with at least one BPL in the first set of BPLs and meet a quality threshold.

[0199] In some examples, a first wireless device includes an IAB device including a mobile terminal node associated with a first set of receiver-side beams and a distributed unit node associated with a second set of receiver-side beams, wherein the mobile terminal node can communicate with a parent node, the distributed unit node can communicate with at least one child node, and wherein the IAB device is capable of full-duplex operation with the parent node and the child node.

[0200] In some examples, the first set of BPLs may be associated with a parent node, and the second set of BPLs may be associated with a child node. The second set of BPLs may be selected based on a subset of the second set of receiver-side beams (e.g., at 1412), and each receiver-side beam of the subset may be capable of full-duplex operation with a receiver-side beam of the first set of BPLs. In some examples, the second set of BPLs may be associated with cross-link interference of the first set of BPLs that satisfies an interference threshold. In some examples, the first wireless device may report a third set of BPLs to the second wireless device or the control node based on the first set of BPLs (e.g., at 1422). In some examples, the third set of BPLs may include BPLs that cannot operate in full-duplex with at least one of the first set of BPLs. In some examples, the third set of BPLs may include BPLs that can operate in full-duplex with at least one of the first set of BPLs and that meet a quality threshold.

[0201] In some examples, the first set of BPLs may be associated with a child node, and the second set of BPLs may be associated with a parent node. In some examples, the second set of BPLs may be selected from a subset of the second set of receiver-side beams (e.g., at 1412), and each receiver-side beam of the subset may be capable of full-duplex operation with a receiver-side beam of the first set of BPLs. In some examples, the second set of BPLs may be associated with cross-link interference of the first set of BPLs that meets an interference threshold. The first wireless device may report a third set of BPLs to the second wireless device or the control node based on the first set of BPLs (e.g., at 1422). The third set of BPLs may include BPLs that cannot be full-duplexed with at least one BPL in the first set of BPLs. The third set of BPLs may include BPLs that can be full-duplexed with at least one BPL in the first set of BPLs and that meet a quality threshold.

[0202] At 1424, the first wireless device communicates using full-duplex operation by transmitting or receiving via a BPL in the first set of BPLs while also transmitting or receiving via another one of the BPLs in the second set of BPLs, as described above in conjunction with Figure 10 News 1090, 1092, Figure 11Messages 1190, 1192 and / or Figure 12 At 1424, communication using full-duplex operation may be performed by Figure 15 In some examples, the full-duplex communication component 1554 of the device 1502 is executed. Figure 15 The receiving component 1530 of the device 1502 can facilitate receiving the message while Figure 15 The sending component 1534 of the system 1502 can facilitate sending the message.

[0203] Figure 15 15 is a diagram illustrating an example of a hardware implementation of an apparatus 1502. Apparatus 1502 may be a UE, a base station, an IAB node, or another first wireless device. Apparatus 1502 includes a baseband unit 1504. Baseband unit 1504 may communicate with UE 104, IAB node 103, or base station 102 / 180 via a cellular RF transceiver. Baseband unit 1504 may include computer-readable media / memory. Baseband unit 1504 is responsible for general processing, including executing software stored on computer-readable media / memory. When executed by baseband unit 1504, the software enables baseband unit 1504 to perform the various functions described above. The computer-readable media / memory may also be used to store data manipulated by baseband unit 1504 when executing the software. Baseband unit 1504 also includes a receiving component 1530, a communication manager 1532, and a transmitting component 1534. Communication manager 1532 includes one or more of the components shown. The components within the communication manager 1532 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1504. The baseband unit 1504 may be a component of a UE, an IAB node, etc., and may include at least one of the memory 376 / 360 and / or the TX processor 316 or 368, the RX processor 356 or 370, and the controller / processor 359 or 375.

[0204] The communication manager 1532 includes a relationship component 1540 that is configured to receive information about relationships between beams or BPLs, such as in conjunction with Figure 14 As described in 1402.

[0205] The communication manager 1532 also includes a reference signal component 1542 configured to receive a reference signal set from a second wireless device, for example, as described in conjunction with Figure 13 1302 and / or Figure 14 As described in 1404.

[0206] The communication manager 1532 also includes a determining component 1544 configured to determine a first set of BPLs based on the reference signal set, for example, as combined with Figure 131304 and / or Figure 14 The exemplary determining component 1544 may also be configured to determine the second set of BPLs based on the capability of full-duplex operation with at least one BPL in the first set of BPLs, for example, as combined with Figure 13 1306 and / or Figure 14 As stated in 1412.

[0207] The communication manager 1532 also includes a measurement component 1546 that is configured to perform measurements on the second set of BPLs, for example, as combined with Figure 13 1308 and / or Figure 14 As stated in 1414.

[0208] The communication manager 1532 also includes a reporting component 1548 configured to report the first set of BPLs and the second set of BPLs to the second wireless device, for example, as described in conjunction with Figure 14 1422 as described.

[0209] The communication manager 1532 also includes an evaluation component 1550 configured to evaluate a plurality of receiver-side / transmitter-side beams based on the downlink reference signal, e.g., as combined with Figure 14 For example, the exemplary evaluation component 1550 may also be configured to evaluate a first subset of receiver-side / transmitter-side beams based on a set of reference signals, such as in conjunction with Figure 14 As stated in 1418.

[0210] The communication manager 1532 also includes a selection component 1552 configured to select one or more BPLs based on a receiver side / transmitter side beam that satisfies a quality threshold based on an evaluation, e.g., as combined with Figure 14 For example, the exemplary selection component 1552 may also be configured to select a first subset of receiver-side / transmitter-side beams based on at least one BPL in the first set of BPLs, as described in conjunction with Figure 14 The exemplary selection component 1552 may also be configured to select one or more BPLs based on an evaluation of satisfying a quality threshold based on a first subset of receiver-side / transmitter-side beams, for example, as described in conjunction with Figure 14 As stated in 1420.

[0211] The communication manager 1532 also includes a full-duplex communication component 1554 that is configured to communicate using full-duplex operation, for example, as described in conjunction with Figure 13 1310 and / or Figure 14 1424 as described.

[0212] The apparatus may include executing Figure 13and / or additional components for each block of the algorithm in the flowchart of 14. Thus, Figure 13 and Figure 14 Each block in the flowchart of can be performed by a component, and the apparatus may include one or more of these components. The component can be one or more hardware components that are specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for processor implementation, or some combination thereof.

[0213] As shown, apparatus 1502 may include various components configured for various functions. In one configuration, apparatus 1502, and in particular baseband unit 1504, includes means for receiving a set of reference signals from a second wireless device. Example apparatus 1502 also includes means for determining a first set of BPLs based on the set of reference signals. Example apparatus 1502 also includes means for determining a second set of BPLs based on a capability for full-duplex operation with at least one BPL from the first set of BPLs. Example apparatus 1502 also includes means for performing measurements of the second set of BPLs. Example apparatus 1502 also includes means for communicating using full-duplex operation by transmitting or receiving via a BPL from the first set of BPLs while also transmitting or receiving via a BPL from the second set of BPLs.

[0214] In another configuration, the example apparatus 1502 further includes means for evaluating a plurality of beams based on the set of reference signals. The example apparatus 1502 further includes means for selecting one or more BPLs based on the beams satisfying a quality threshold based on the evaluation.

[0215] In another configuration, the example apparatus 1502 further includes means for selecting a first subset of the plurality of receiver-side beams based on at least one BPL in the first set of BPLs, wherein each receiver-side beam of the first subset of receiver-side beams is capable of full-duplex operation with a receiver-side beam of at least one BPL in the first set of BPLs. The example apparatus 1502 further includes means for evaluating the first subset of receiver-side beams based on a set of reference signals. The example apparatus 1502 further includes means for selecting, based on the first subset of receiver-side beams, one or more BPLs that meet a quality threshold based on the evaluation.

[0216] In another configuration, the example apparatus 1502 further includes means for receiving information regarding a relationship between at least one BPL of the first set of BPLs and beams of the second set of receiver-side beams, and wherein selecting the first set of receiver-side beams is based on the received information.

[0217] In another configuration, the example apparatus 1502 further includes means for selecting a first subset of the plurality of transmitter-side beams based on at least one BPL in the first set of BPLs, wherein each transmitter-side beam of the first subset of transmitter-side beams is capable of full-duplex operation with a transmitter-side beam of at least one BPL in the first set of BPLs. The example apparatus 1502 further includes means for evaluating the first subset of transmitter-side beams based on a set of reference signals. The example apparatus 1502 further includes means for selecting, based on the first subset of transmitter-side beams, one or more BPLs that satisfy a quality threshold based on the evaluation.

[0218] In another configuration, the example apparatus 1502 further includes means for receiving information regarding a relationship between beams of the first subset of transmitter-side beams and beams of the second subset of transmitter-side beams, and wherein selecting the first subset of transmitter-side beams is based on the received information.

[0219] In another configuration, the example apparatus 1502 further includes means for receiving information regarding a relationship between at least one BPL of the first set of BPLs and beams of the second subset of transmitter-side beams, wherein selecting the first subset of transmitter-side beams is based on the received information.

[0220] In another configuration, the example apparatus 1502 further includes means for reporting at least one of the first set of BPLs and the second set of BPLs to a second wireless device or a control node.

[0221] In another configuration, the example apparatus 1502 further includes a component for receiving relationship information between beams of a first subset of transmitter side beams of a second wireless device and beams of a second subset of transmitter side beams of a third wireless device, wherein the BPL of the first set is associated with a subset of the first subset of transmitter side beams, and the BPL of the second set is associated with a subset of the second subset of transmitter side beams, and wherein determining the BPL of the second set is based on the received information.

[0222] A means may be one or more components of the apparatus 1502 configured to perform the functions recited by the means. As described above, the apparatus 1502 may include the TX processor 316 / 368, the RX processor 356 / 370, and the controller / processor 359 / 375. Thus, in one configuration, the means may be the TX processor 316 / 368, the RX processor 356 / 375, and the controller / processor 359 / 377 configured to perform the functions recited by the means.

[0223] The baseband unit 1504 may be a component of a UE, an IAB node, etc., and may include a memory 376 / 360 and / or at least one of the TX processor 316 or 368 , the RX processor 356 or 370 , and the controller / processor 359 or 375 .

[0224] To facilitate full-duplex communication, example techniques disclosed herein enable a wireless device to reduce the number of beams that may be processed to determine full-duplex communication. For example, the disclosed techniques enable identifying a first beam candidate and then prioritizing searching a subset of beam candidates that are capable of full-duplex communication relative to the first beam candidate (e.g., a second beam candidate in the subset of beam candidates that may be used for communication while also using the first beam candidate).

[0225] It should be understood that the specific order or hierarchy of blocks in the disclosed processes / flowcharts is illustrative of example methods. Based on design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. In addition, some blocks may be combined or omitted. The accompanying methods call for elements of the various blocks to be presented in a sample order and are not meant to be limited to the specific order or hierarchy presented.

[0226] The preceding description is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Accordingly, the claims are not intended to be limited to the various aspects shown herein, but should be given the full scope consistent with the language of the claims, wherein, unless otherwise specified, references to elements in the singular do not mean "one and only one," but rather "one or more." Terms such as "if," "when," and "at" should be interpreted as meaning "under certain conditions," rather than implying a direct temporal relationship or reaction. That is, these phrases, such as "when," do not mean to act immediately in response to an action or during the occurrence of an action, but simply imply that if the condition is met, the action will occur, but without requiring a specific or immediate time limit for the action to occur. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as superior to other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one member or multiple members of A, B, C. All structural and functional equivalents to the elements throughout the various aspects described in this disclosure that are known or later become known to one of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether the disclosure is explicitly recited in the claims. Words such as “module,” “mechanism,” “element,” “device,” etc. are not intended to be a substitute for “means.” Thus, no claim element can be construed as means+function unless the element is expressly recited using the phrase “means for.”

[0227] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0228] Aspect 1 is an apparatus for wireless communication at a first wireless device, comprising: at least one processor coupled to a memory and configured to receive a set of reference signals from a second wireless device; determine a first set of BPLs based on the set of reference signals; determine a second set of BPLs based on a capability of full-duplex operation with at least one BPL in the first set of BPLs; perform measurements on the second set of BPLs; and communicate using full-duplex operation by transmitting or receiving via a BPL in the first set of BPLs while also performing the other of transmitting or receiving via a BPL in the second set of BPLs.

[0229] Aspect 2 is the apparatus described in Aspect 1, further comprising: the reference signal set includes at least one of CSI-RS, SSB, PT-RS or SRS.

[0230] Aspect 3 is the apparatus described in any one of Aspects 1 and 2, further comprising: in order to determine the BPL of the first set, the at least one processor and memory are configured to: evaluate multiple beams based on the reference signal set; and select one or more BPLs based on the beams, wherein the beams meet the quality threshold based on the evaluation.

[0231] Aspect 4 is the apparatus described in any one of Aspects 1 to 3, further comprising: in order to determine the BPL of the second set, the at least one processor and the memory are configured to: select a first subset of multiple receiver side beams based on at least one BPL in the BPL of the first set, wherein each receiver side beam of the first subset of receiver side beams is capable of full-duplex operation with the receiver side beam of at least one BPL in the BPL of the first set; evaluate the first subset of receiver side beams based on the reference signal set; and select one or more BPLs that meet a quality threshold based on the evaluation based on the first subset of receiver side beams.

[0232] Aspect 5 is the apparatus of any one of aspects 1 to 4, further comprising: the second subset of the plurality of receiver-side beams comprises a receiver-side beam of at least one BPL in the first set of BPLs.

[0233] Aspect 6 is an apparatus as described in any one of Aspects 1 to 5, further comprising: a first subset of receiver side beams is associated with a first antenna array of a first wireless device, and a second subset of receiver side beams is associated with a second antenna array of a first wireless device, wherein the first antenna array is different from the second antenna array.

[0234] Aspect 7 is the apparatus of any one of Aspects 1 to 6, further comprising: the at least one processor and the memory being configured to: receive information about the relationship between at least one BPL in the first set of BPLs and the beams of the second subset of receiver side beams, wherein the first subset of receiver side beams is selected based on the received information.

[0235] Aspect 8 is the apparatus described in any one of Aspects 1 to 7, further including: in order to determine the BPL of the second set, the at least one processor and the memory are configured to: select a first subset of multiple transmitter side beams based on at least one BPL in the BPL of the first set, wherein each transmitter side beam of the first subset of transmitter side beams is capable of full-duplex operation with the transmitter side beam of at least one BPL in the BPL of the first set; evaluate the first subset of transmitter side beams based on the reference signal set; and select one or more BPLs that meet a quality threshold based on the evaluation based on the first subset of transmitter side beams.

[0236] Aspect 9 is the apparatus described in any one of aspects 1 to 8, further comprising: the reference signal set is associated with at least two transmitter-side beams.

[0237] Aspect 10 is the apparatus of any one of aspects 1 to 9, further comprising: the second subset of the plurality of transmitter-side beams comprises a transmitter-side beam of at least one BPL in the first set of BPLs.

[0238] Aspect 11 is an apparatus according to any one of Aspects 1 to 10, further comprising: a first subset of transmitter side beams is associated with a first antenna array or a first TRP of a second wireless device, and a second subset of transmitter side beams is associated with a second antenna array or a second TRP of a second wireless device, the first antenna array or the first TRP being different from the second antenna array or the second TRP.

[0239] Aspect 12 is the apparatus described in any one of Aspects 1 to 11, further comprising: the at least one processor and memory are configured to: receive information about the relationship between the beams of a first subset of transmitter side beams and the beams of a second subset of transmitter side beams, wherein the first subset of transmitter side beams is selected based on the received information.

[0240] Aspect 13 is the apparatus of any one of Aspects 1 to 12, further comprising: the at least one processor and the memory being configured to: receive information about the relationship between at least one BPL in the first set of BPLs and the beams of the second subset of transmitter side beams, wherein the first subset of transmitter side beams is selected based on the received information.

[0241] Aspect 14 is the apparatus of any one of aspects 1 to 13, further comprising: the at least one processor and memory being configured to: report at least one of the first set of BPLs and the second set of BPLs to a second wireless device or a control node.

[0242] Aspect 15 is the apparatus described in any one of Aspects 1 to 14, further comprising: the first wireless device comprises a UE or a mobile terminal node, and the second wireless device comprises a first TRP and a second TRP.

[0243] Aspect 16 is the apparatus of any one of aspects 1 to 15, further comprising: the first wireless device and the second wireless device are both capable of full-duplex operation.

[0244] Aspect 17 is the apparatus described in any one of aspects 1 to 14, further comprising: the first wireless device comprises a UE or a mobile terminal node, and the second wireless device comprises a base station or a distributed unit node.

[0245] Aspect 18 is the apparatus of any one of aspects 1 to 17, further comprising: the first wireless device and the second wireless device are both capable of full-duplex operation.

[0246] Aspect 19 is the apparatus of any one of aspects 1 to 18, further comprising: the first set of BPLs is associated with a second wireless device, and the second set of BPLs is associated with a third wireless device different from the second wireless device.

[0247] Aspect 20 is the apparatus described in any one of aspects 1 to 19, further comprising: the first wireless device comprises a UE or a mobile terminal node, the second wireless device comprises a first distributed unit node, and the third wireless device comprises a second distributed unit node.

[0248] Aspect 21 is the apparatus of any one of aspects 1 to 20, further comprising: the first wireless device is capable of full-duplex operation.

[0249] Aspect 22 is the apparatus described in any one of Aspects 1 to 19, further comprising: the first wireless device comprises a base station or a distributed unit node, the second wireless device comprises a first UE or a mobile terminal node, and the third wireless device comprises a second UE or a wireless terminal node.

[0250] Aspect 23 is the apparatus of any one of aspects 1 to 22, further comprising: the first wireless device is capable of full-duplex operation.

[0251] Aspect 24 is the apparatus described in any one of Aspects 1 to 23, further comprising: the at least one processor and memory being configured to: receive relationship information between beams of a first subset of transmitter side beams of a second wireless device and beams of a second subset of transmitter side beams of a third wireless device, wherein the BPL of the first set is associated with a subset of the first subset of transmitter side beams, and the BPL of the second set is associated with a subset of the second subset of transmitter side beams, and wherein the BPL of the second set is determined based on the received information.

[0252] Aspect 25 is the apparatus of any one of Aspects 1 to 24, further comprising: beams of the first subset of transmitter-side beams and beams of the second subset of transmitter-side beams are associated with cross-link interference that satisfies an interference threshold.

[0253] Aspect 26 is the apparatus of any one of aspects 1 to 25, further comprising: the first wireless device reporting a third set of BPLs to a third wireless device based on the first set of BPLs.

[0254] Aspect 27 is the apparatus of any one of aspects 1 to 26, further comprising: the third set of BPLs includes at least one of the following: a BPL that cannot perform full-duplex operation with at least one BPL in the first set of BPLs, or a BPL that cannot meet a quality threshold.

[0255] Aspect 28 is the apparatus of any one of aspects 1 to 27, further comprising: the third set of BPLs includes a BPL capable of full-duplex operation with at least one BPL in the first set of BPLs and satisfying a quality threshold.

[0256] Aspect 29 is the apparatus described in any one of Aspects 1 to 14, further comprising: the first wireless device includes an IAB device, including a mobile terminal node associated with a first set of receiver side beams and a distributed unit node associated with a second set of receiver side beams.

[0257] Aspect 30 is the apparatus of any one of aspects 1 to 29, further comprising: the mobile terminal node communicates with a parent node, the distributed unit node communicates with at least one child node, and wherein the IAB device is capable of full-duplex operation with the parent node and the child node.

[0258] Aspect 31 is the apparatus of any one of aspects 1 to 30, further comprising: the first set of BPLs is associated with a parent node, and wherein the second set of BPLs is associated with a child node.

[0259] Aspect 32 is an apparatus as described in any one of Aspects 1 to 31, further comprising: selecting a second set of BPLs based on a subset of the receiver side beams of the second set, and wherein each receiver side beam of the subset is capable of full-duplex operation with the receiver side beam of the first set of BPLs.

[0260] Aspect 33 is the apparatus of any one of aspects 1 to 31, further comprising: the second set of BPLs being associated with cross-link interference of the first set of BPLs satisfying an interference threshold.

[0261] Aspect 34 is the apparatus of any one of aspects 1 to 33, further comprising: the first wireless device reporting a third set of BPLs to the second wireless device or the control node based on the first set of BPLs.

[0262] Aspect 35 is the apparatus of any one of aspects 1 to 34, further comprising: the third set of BPLs includes a BPL that is incapable of full-duplex operation with at least one BPL in the first set of BPLs.

[0263] Aspect 36 is the apparatus of any one of aspects 1 to 35, further comprising: the third set of BPLs includes BPLs that can perform full-duplex operation with at least one BPL in the first set of BPLs and meet a quality threshold.

[0264] Aspect 37 is the apparatus of any one of aspects 1 to 36, further comprising: the first set of BPLs is associated with a child node, and wherein the second set of BPLs is associated with a parent node.

[0265] Aspect 38 is the apparatus of any one of Aspects 1 to 37, further comprising: selecting a second set of BPLs from a subset of the second set of receiver side beams, and wherein each receiver side beam of the subset is capable of full-duplex operation with the receiver side beam of the first set of BPLs.

[0266] Aspect 39 is the apparatus of any one of aspects 1 to 38, further comprising: the second set of BPLs being associated with cross-link interference of the first set of BPLs satisfying an interference threshold.

[0267] Aspect 40 is the apparatus of any one of aspects 1 to 39, further comprising: the first wireless device reporting a third set of BPLs to the second wireless device or the control node based on the first set of BPLs.

[0268] Aspect 41 is the apparatus of any one of aspects 1 to 40, further comprising: the third set of BPLs includes a BPL that is incapable of full-duplex operation with at least one BPL in the first set of BPLs.

[0269] Aspect 42 is the apparatus of any one of aspects 1 to 41, further comprising: the third set of BPLs includes BPLs capable of full-duplex operation with at least one BPL in the first set of BPLs and satisfying a quality threshold.

[0270] Aspect 43 is the apparatus of any one of aspects 1 to 42, further comprising: a transceiver coupled to the at least one processor.

[0271] Aspect 44 is a wireless communication method for implementing any one of aspects 1 to 43.

[0272] Aspect 45 is an apparatus for wireless communication, comprising means for implementing any one of aspects 1 to 43.

[0273] Aspect 46 is a non-transitory computer-readable storage medium storing computer-executable code, wherein when the code is executed, the code causes a processor to implement any one of aspects 1 to 43.

Claims

1. An apparatus for wireless communication at a first wireless device, comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving a set of reference signals from a second wireless device; determining a first set of beam pair links (BPLs) based on the reference signal set, wherein each BPL in the first set of BPLs includes a first transmit beam and a first receive beam; determining to evaluate the second set of BPLs based on a capability of the second set of BPLs to operate in full duplex with at least one BPL in the first set of BPLs, wherein each BPL in the second set of BPLs includes a second transmit beam and a second receive beam; performing measurement on the BPL of the second set; as well as Communication is performed using full-duplex operation by transmitting or receiving via a first BPL of the first set of BPLs while also performing the other of transmitting or receiving via a second BPL of the second set of BPLs.

2. The device according to claim 1, wherein To determine the BPL of the first set, the at least one processor is configured to: evaluating a plurality of beams based on the set of reference signals; as well as One or more BPLs are selected based on one or more beams that satisfy a quality threshold based on an evaluation of the plurality of beams.

3. The device according to claim 1, wherein To determine the BPL of the second set, the at least one processor is configured to: selecting a first subset of receiver side beams from a plurality of receiver side beams based on the at least one BPL in the first set of BPLs, wherein each receiver side beam in the first subset of receiver side beams is capable of full-duplex operation with the receiver side beam of the at least one BPL in the first set of BPLs; evaluating said first subset of receiver-side beams based on said set of reference signals; and One or more BPLs are selected based on the first subset of receiver-side beams, the first subset of receiver-side beams satisfying a quality threshold based on an evaluation.

4. The device according to claim 3, wherein The second subset of receiver-side beams includes the receiver-side beams of the at least one BPL of the first set of BPLs.

5. The device according to claim 4, wherein The first subset of receiver-side beams is associated with a first antenna array of the first wireless device, and the second subset of receiver-side beams is associated with a second antenna array of the first wireless device, wherein the first antenna array is different from the second antenna array.

6. The device according to claim 4, wherein The at least one processor is configured to: receiving information about a relationship between said at least one BPL of said first set of BPLs and beams of said second subset of receiver-side beams, wherein the first subset of receiver side beams is selected based on the received information, wherein each receiver side beam in the first subset of receiver side beams is capable of full-duplex operation with a beam in the second subset of receiver side beams.

7. The device according to claim 1, wherein To determine the BPL of the second set, the at least one processor is configured to: selecting a first subset of transmitter side beams from a plurality of transmitter side beams based on the at least one BPL in the first set of BPLs, wherein each transmitter side beam in the first subset of transmitter side beams is capable of full-duplex operation with the transmitter side beam of the at least one BPL in the first set of BPLs; evaluating said first subset of transmitter-side beams based on said set of reference signals; and One or more BPLs are selected based on the first subset of transmitter side beams satisfying a quality threshold based on an evaluation.

8. The device according to claim 7, wherein The set of reference signals is associated with at least two transmitter-side beams.

9. The device according to claim 7, wherein The second subset of transmitter side beams includes the transmitter side beams of the at least one BPL of the first set of BPLs.

10. The device according to claim 9, wherein The first subset of transmitter side beams is associated with a first antenna array or a first TRP of the second wireless device, and the second subset of transmitter side beams is associated with a second antenna array or a second TRP of the second wireless device, the first antenna array or the first TRP being different from the second antenna array or the second TRP.

11. The device according to claim 9, wherein The at least one processor is configured to: receiving information about a relationship between beams of the first subset of transmitter side beams and beams of the second subset of transmitter side beams, wherein the received information includes information about beams having full duplex capability, Therein, the first subset of transmitter-side beams is selected based on the received information.

12. The device according to claim 9, wherein The at least one processor is configured to: receiving information about a relationship between said at least one BPL of said first set of BPLs and beams of said second subset of transmitter-side beams, wherein the first subset of transmitter side beams is selected based on the received information, wherein each transmitter side beam in the first subset of transmitter side beams is capable of full-duplex operation with a beam in the second subset of transmitter side beams.

13. The device according to claim 1, wherein The at least one processor is configured to: At least one of the first set of BPLs and the second set of BPLs is reported to the second wireless device or a control node.

14. The device according to claim 1, wherein The first wireless device includes a user equipment UE or a mobile terminal node, and the second wireless device includes a first transmission-reception point TRP and a second TRP.

15. The device according to claim 1, wherein The first wireless device includes a user equipment UE or a mobile terminal node, and the second wireless device includes a base station or a distributed unit node.

16. The device according to claim 1, wherein The first set of BPLs is associated with the second wireless device, and the second set of BPLs is associated with a third wireless device different from the second wireless device.

17. The device according to claim 16, wherein The first wireless device includes a user equipment UE or a mobile terminal node, the second wireless device includes a first distributed unit node, and the third wireless device includes a second distributed unit node.

18. The device according to claim 16, wherein The first wireless device includes a base station or a distributed unit node, the second wireless device includes a first user equipment UE or a first mobile terminal node, and the third wireless device includes a second UE or a second mobile terminal node.

19. The device according to claim 16, wherein The at least one processor is configured to: receiving relationship information between the beams of the first subset of transmitter-side beams of the second wireless device and the beams of the second subset of transmitter-side beams of the third wireless device, wherein the first set of BPLs is associated with a subset of the first subset of transmitter side beams, and the second set of BPLs is associated with a subset of the second subset of transmitter side beams, and The BPL of the second set is determined based on the received relationship information.

20. The apparatus according to claim 16, wherein The first wireless device reports a third set of BPLs to the third wireless device based on the first set of BPLs, wherein the third set of BPLs includes BPLs that cannot perform full-duplex operation with the at least one BPL in the first set of BPLs, or BPLs that can perform full-duplex operation with the at least one BPL in the first set of BPLs and meet a quality threshold.

21. The device according to claim 1, wherein The first wireless device comprises an integrated access and backhaul (IAB) device including a mobile terminal node associated with a first set of receiver-side beams and a distributed unit node associated with a second set of receiver-side beams.

22. The device according to claim 21, wherein The mobile terminal node communicates with a parent node, the distributed unit node communicates with at least one child node, and wherein the IAB device is capable of full-duplex operation with the parent node and the at least one child node.

23. The device according to claim 22, wherein The first wireless device reports a third set of BPLs to the second wireless device or the control node based on the BPLs in the first set, wherein the third set of BPLs includes BPLs that cannot perform full-duplex operation with the at least one BPL in the first set of BPLs, or BPLs that can perform full-duplex operation with the at least one BPL in the first set of BPLs and meet a quality threshold.

24. The device according to claim 23, wherein The second set of BPLs is selected from a subset of the second set of receiver-side beams, and wherein each receiver-side beam in the subset is capable of full-duplex operation with a receiver-side beam in the first set of BPLs.

25. The apparatus according to claim 23, wherein The first set of BPLs is associated with the at least one child node, and wherein the second set of BPLs is associated with the parent node.

26. The device according to claim 25, wherein The second set of BPLs is associated with cross-link interference to the first set of BPLs that satisfies an interference threshold.

27. The device according to claim 26, wherein The first wireless device reports the third set of BPLs to the second wireless device or the control node based on the first set of BPLs.

28. The apparatus of claim 1 , further comprising a transceiver coupled to at least one processor, the transceiver configured to receive the set of reference signals from the second wireless device and communicate using full-duplex operation by transmitting or receiving via the first of the first set of BPLs while also performing the other of transmitting or receiving via the second of the second set of BPLs.

29. A wireless communication method at a first wireless device, comprising: receiving a set of reference signals from a second wireless device; determining a first set of beam pair links (BPLs) based on the reference signal set, wherein each BPL in the first set of BPLs includes a first transmit beam and a first receive beam; determining to evaluate the second set of BPLs based on a capability of the second set of BPLs to operate in full duplex with at least one BPL in the first set of BPLs, wherein each BPL in the second set of BPLs includes a second transmit beam and a second receive beam; performing measurement on the BPL of the second set; as well as Communication is performed using full-duplex operation by transmitting or receiving via a first BPL of the first set of BPLs while also performing the other of transmitting or receiving via a second BPL of the second set of BPLs.

30. The method according to claim 29, wherein Determining the BPL of the first set includes: evaluating a plurality of beams based on the set of reference signals; and One or more BPLs are selected based on one or more beams that satisfy a quality threshold based on an evaluation of the plurality of beams.

31. A non-transitory computer-readable medium having stored therein instructions that, when executed by at least one processor of a first wireless device, cause the first wireless device to: receiving a set of reference signals from a second wireless device; determining a first set of beam pair links (BPLs) based on the reference signal set, wherein each BPL in the first set of BPLs includes a first transmit beam and a first receive beam; determining to evaluate the second set of BPLs based on a capability of the second set of BPLs to operate in full duplex with at least one BPL in the first set of BPLs, wherein each BPL in the second set of BPLs includes a second transmit beam and a second receive beam; performing measurement on the BPL of the second set; and Communication is performed using full-duplex operation by transmitting or receiving via a first BPL of the first set of BPLs while also performing the other of transmitting or receiving via a second BPL of the second set of BPLs.

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