Reference signal transmission by full-duplex user equipment

Abstract

The present disclosure provides systems, methods, and devices, including computer programs encoded on computer storage media, for wireless communications. In one aspect of the disclosure, a method of wireless communication includes receiving, at a user equipment (UE), a resource configuration message from a network entity. The resource configuration message includes a first parameter corresponding to a full duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The method also includes transmitting, from the UE to the network entity, an FD reference signal based on the resource configuration message. Other aspects and features are also claimed and described.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of International Patent Application No. PCT / CN2020 / 079182, filed on March 13, 2020, entitled “Transmission of Reference Signals via Full-Duplex User Equipment”, which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The various aspects of this disclosure generally relate to wireless communication systems, and more specifically, but not limited to, the transmission of reference signals through full-duplex user equipment. Background Technology

[0004] Wireless communication networks are widely deployed to provide various communication services, such as voice, video, packet data, messaging, and broadcasting. These wireless networks can be multiple access networks capable of supporting multiple users by sharing available network resources. Such networks, typically multiple access networks, support communication for multiple users by sharing available network resources. An example of such a network is the Universal Terrestrial Radio Access Network (UTRAN). UTRAN is a radio access network (RAN) defined as part of the Universal Mobile Telecommunications System (UMTS), supporting third-generation (3G) mobile phone technology supported by the 3rd Generation Partnership Project (3GPP). Examples of multiple access network formats include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, and Single Carrier FDMA (SC-FDMA) networks.

[0005] A wireless communication network may include multiple base stations or nodes B that can support communication between multiple user equipments (UEs). UEs can communicate with base stations via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the base station to the UE, while an uplink (or reverse link) refers to the communication link from the UE to the base station.

[0006] A base station can send data and control information to a UE on the downlink or receive data and control information from a UE on the uplink. On the downlink, transmissions from the base station may encounter interference from neighboring base stations or other radio frequency (RF) transmitters. On the uplink, transmissions from the UE may encounter interference from uplink transmissions from other UEs communicating with neighboring base stations or from other RF transmitters. This interference can degrade the performance of both the downlink and uplink.

[0007] With the increasing demand for mobile broadband access, the growing number of user devices (UEs) accessing long-range wireless communication networks, and the deployment of more short-range wireless systems in communities, the likelihood of network interference and congestion is also increasing. Research and development are continuously advancing wireless technologies not only to meet the growing demand for mobile broadband access but also to improve and enhance the user experience of mobile communications.

[0008] In some wireless communication systems, as part of the uplink (UL) beam determination and scheduling process, the UE may transmit reference signals to the base station. For example, the UE may transmit one or more sounding reference signals (SRS) to the base station via one or more UL beams. The base station determines one or more UL beams to schedule for the UE based on the channel gain of one or more SRSs. For example, the base station may select the UL beam with the SRS that has the highest channel gain to improve UL signal quality and throughput.

[0009] Fifth-generation (5G) wireless networks promise to provide ultra-high data rates and support a wide range of application scenarios. To support such high data rates, one proposed technology is full-duplex (FD) communication. In FD communication, radio nodes are configured to simultaneously transmit and receive signals in the same frequency band and time slot. FD communication has been proposed for the UE, enabling it to transmit and receive signals simultaneously, thereby increasing aggregated UL and downlink (DL) throughput at the UE. An important aspect of enabling FD communication at the UE is eliminating (or reducing) self-interference from DL to UL. However, current UL beam scheduling procedures select UL beams based solely on UL channel gain, which can cause strong self-interference with received DL signals, reducing DL throughput and potentially leading to DL transmission failures. Summary of the Invention

[0010] The systems, methods, and apparatuses disclosed herein each have several innovative aspects, and no single innovative aspect is solely responsible for the desirable properties disclosed herein. One innovative aspect of the subject matter described in this disclosure can be implemented in a wireless communication method. The method includes receiving a resource configuration message from a network entity at a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The method further includes transmitting an FD reference signal from the UE to the network entity based on the resource configuration message.

[0011] Another innovative aspect of the subject matter described in this disclosure can be implemented in a device configured for wireless communication. The device includes at least one processor and memory coupled to the at least one processor. The at least one processor is configured to receive a resource configuration message from a network entity at a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The at least one processor is also configured to initiate the transmission of an FD reference signal from the UE to the network entity based on the resource configuration message.

[0012] Another innovative aspect of the subject matter described in this disclosure can be implemented in a device configured for wireless communication. The device includes means for receiving a resource configuration message from a network entity at a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The device also includes means for transmitting an FD reference signal from the UE to the network entity based on the resource configuration message.

[0013] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform operations at a user equipment (UE) including receiving a resource configuration message from a network entity. The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The operations also include initiating the transmission of an FD reference signal from the UE to the network entity based on the resource configuration message.

[0014] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless communication method. The method includes sending a resource configuration message from a network entity to a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The method also includes receiving an FD reference signal from the UE at the network entity based on the resource configuration message.

[0015] Another innovative aspect of the subject matter described in this disclosure can be implemented in a device configured for wireless communication. The device includes at least one processor and memory coupled to the at least one processor. The at least one processor is configured to initiate the transmission of a resource configuration message from a network entity to a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The at least one processor is also configured to receive an FD reference signal from the UE at the network entity based on the resource configuration message.

[0016] Another innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus configured for wireless communication. The apparatus includes means for sending a resource configuration message from a network entity to a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The apparatus also includes means for receiving an FD reference signal from the UE at the network entity based on the resource configuration message.

[0017] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform operations including initiating the transmission of a resource configuration message from a network entity to a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The operations also include receiving an FD reference signal from the UE at the network entity based on the resource configuration message.

[0018] Details of one or more embodiments of the subject matter described in this disclosure are set forth in the accompanying drawings and the following description. Other features, aspects, and advantages will become apparent from the specification, drawings, and claims. Note that the relative dimensions in the following drawings may not be drawn to scale. Attached Figure Description

[0019] Figure 1 It is a block diagram illustrating the details of an exemplary wireless communication system.

[0020] Figure 2 It is a block diagram that conceptually illustrates an exemplary design of a base station and a user equipment (UE).

[0021] Figure 3 This is a block diagram illustrating an exemplary wireless communication system that enables a UE to operate in full-duplex (FD) mode with reduced (or eliminated) self-interference.

[0022] Figure 4 This is a ladder diagram illustrating an exemplary wireless communication system that enables a UE to operate in FD mode with reduced (or eliminated) self-interference.

[0023] Figure 5 This is a flowchart illustrating an exemplary process for UE operation used for communication.

[0024] Figure 6 It is a flowchart illustrating an exemplary process for network entity operations used in communication.

[0025] Figure 7 It is a conceptual diagram that shows the design of the UE.

[0026] Figure 8 It is a conceptual diagram that shows the design of network entities.

[0027] In the various figures, the same reference numerals and symbols denote the same elements. Detailed Implementation

[0028] For the purpose of describing the innovative aspects of this disclosure, the following description and appendices are directed to certain embodiments. However, those skilled in the art will readily recognize that the teachings herein can be applied in a variety of different ways. Some examples in this disclosure are based on wireless and wired local area network (LAN) communications according to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless standard, the IEEE 802.3 Ethernet standard, and the IEEE 1901 power line communication (PLC) standard. However, the described embodiments can be implemented in any device, system, or network capable of transmitting and receiving RF signals according to any wireless communication standard, including any IEEE 802.11 standard. Standards, Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Global System for Mobile Communications (GSM), GSM / General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), Terrestrial Trunking Radio (TETRA), Wideband-CDMA (W-CDMA), Evolved Data Optimized (EV-DO), 1xEV-DO, EV-DO Version A, EV-DO Version B, High-Speed ​​Packet Access (HSPA), High-Speed ​​Downlink Packet Access (HSDPA), High-Speed ​​Uplink Packet Access (HSUPA), Evolved High-Speed ​​Packet Access (HSPA+), Long Term Evolution (LTE), AMPS, or other known signals used for communication within wireless, cellular, or Internet of Things (IoT) networks, such as systems utilizing 3G, 4G, or 5G, or further implementations or technologies thereof.

[0029] This disclosure provides systems, apparatus, methods, and computer-readable media for reducing (or eliminating) self-interference from the uplink (UL) channel to the downlink (DL) channel for a full-duplex (FD) UE, thereby enabling FD communication at the UE. For example, the techniques described herein provide a reference signal transmission scheme for the FD UE, enabling the FD UE to determine a UL reference signal beam that not only enhances the gain of the UL channel but also reduces self-interference to the DL channel. For illustration, the UE can receive a resource configuration message from a network entity (such as a base station), the resource configuration message including a first parameter corresponding to the FD UL and a second parameter corresponding to the FD DL. The UE can transmit an FD reference signal based on the resource configuration message.

[0030] The UE selects the UL beam based on UL gain and on reducing self-interference, rather than simply selecting the UL beam based on UL gain to transmit the FD reference signal to the base station. For example, the UE can select a UL beam that maximizes the signal-to-interference-plus-noise ratio (SINR) of the first received signal while ensuring that the self-interference to the second received signal caused by the transmitted signal is less than a threshold. Additionally or alternatively, the UE can select a UL beam that minimizes the correlation coefficient between the transmit beam and the UL beam used to transmit the FD reference signal while ensuring that the self-interference to the received signal caused by the transmitted signal is less than a threshold. In this way, the UE selects the UL beam for the transmission of the FD reference signal (e.g., a sounding reference signal (SRS)), which improves the UL gain and reduces self-interference to the DL signal at the UE.

[0031] Specific implementations of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some aspects, this disclosure provides processes and techniques for determining a UE reference signal and the UL beam through which the reference signal is transmitted, which reduces self-interference with the DL signal at the UE. This can enable FD communication at the UE and improve DL throughput in FD mode, as well as reduce (or eliminate) DL transmission failures in FD mode.

[0032] This disclosure generally relates to providing or participating in licensed shared access between two or more wireless communication systems (also referred to as wireless communication networks). In various embodiments, the technologies and apparatus described can be used in wireless communication networks such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, Single Carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5th Generation (5G) or New Radio (NR) networks (sometimes referred to as “5G NR” networks / systems / devices), and other communication networks. As described herein, the terms “network” and “system” are used interchangeably.

[0033] CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA) and CDMA2000. UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR). CDMA2000 covers the IS-2000, IS-95, and IS-856 standards.

[0034] TDMA networks can implement radio technologies such as the Global System for Mobile Communications (GSM). 3GPP defines the standard for the GSMEDGE (Enhanced Data Rate for GSM Evolution) Radio Access Network (RAN), also known as GERAN. GERAN is the radio component of GSM / EDGE and the network connecting base stations (e.g., Ater and Abis interfaces) and base station controllers (A interface, etc.). The radio access network represents the component of the GSM network through which telephone calls and packet data are routed to and from the Public Switched Telephone Network (PSTN) and the Internet, and to and from subscriber mobile phones (also known as user terminals or user equipment (UE)). A mobile phone operator's network may include one or more GERANs, which, in the case of UMTS / GSM networks, may be coupled with UTRAN. Furthermore, an operator's network may include one or more LTE networks, or one or more other networks. Different network types can use different Radio Access Technologies (RATs) and Radio Access Networks (RANs).

[0035] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, and flash-OFDM. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Specifically, Long Term Evolution (LTE) is a UMTS version using E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents provided by an organization called the 3rd Generation Partnership Project (3GPP), and cdma2000 is described in documents provided by an organization called the 3rd Generation Partnership Project 2 (3GPP2). These various radio technologies and standards are known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between telecommunications associations aimed at defining globally applicable third-generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the Universal Mobile Telecommunications System (UMTS) mobile phone standard. 3GPP defines specifications for next-generation mobile networks, mobile systems, and mobile devices. This disclosure may refer to LTE, 4G, 5G, or NR technologies in certain aspects; however, the description is not intended to be limited to any particular technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. In fact, one or more aspects of this disclosure relate to shared access to radio spectrum between networks using different radio access technologies or radio air interfaces.

[0036] 5G networks take into account diverse deployments, diverse spectrum, and diverse services and devices, which can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are considered. 5G NR will be able to expand to provide coverage (1) to massive Internet of Things (IoT) with ultra-high densities (such as approximately 1 M nodes / km). 2 (1) Ultra-low complexity (e.g., about 10 bits / second), ultra-low energy (e.g., battery life of more than 10 years), and deep coverage, enabling it to reach challenging locations; (2) Includes mission-critical controls with robust security to protect sensitive personal, financial, or confidential information, ultra-high reliability (e.g., about 99.9999% reliability), ultra-low latency (e.g., about 1 millisecond (ms)), and users with wide mobility or lack of mobility; (3) Features enhanced mobile broadband, including ultra-high capacity (e.g., about 10 Tbps / km). 2 ), ultra-high data rates (such as multi-Gbps rates, 100+Mbps user experience rates), and deep awareness with advanced discovery and optimization.

[0037] 5G NR devices, networks, and systems can be implemented to utilize optimized OFDM-based waveform characteristics. These characteristics can include scalable parameter sets and transmission time intervals (TTIs); a general and flexible framework to efficiently multiplex services and characteristics through dynamic, low-latency Time Division Duplex (TDD) / Frequency Division Duplex (FDD) designs; and advanced wireless technologies such as massive MIMO, robust millimeter-wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of parameter sets and the expansion of subcarrier spacing in 5G NR can effectively address operational challenges across different spectrums and deployments for different services. For example, in various outdoor and macro coverage deployments using FDD / TDD implementations below 3 GHz, subcarrier spacing can occur at 15 kHz, exceeding bandwidths such as 1 MHz, 5 MHz, 10 MHz, and 20 MHz. For other various outdoor and small cell coverage deployments using TDD above 3 GHz, subcarrier spacing of 30 kHz may occur over 80 / 100 MHz bandwidths. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5 GHz band, subcarrier spacing may occur at 60 kHz over a 160 MHz bandwidth. Finally, for various deployments using millimeter-wave components for transmission under 28 GHz TDD, a subcarrier spacing of 120 kHz may occur over a 500 MHz bandwidth.

[0038] 5G NR's scalable parameter set facilitates scalable TTIs for various latency and Quality of Service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmission to begin at symbol boundaries. 5G NR also considers a self-contained integrated subframe design, containing uplink / downlink scheduling information, data, and acknowledgments within the same subframe. Self-contained integrated subframes support communication in unlicensed or contention-based shared spectrum, and adaptive uplink / downlink can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic demands.

[0039] For clarity, certain aspects of the devices and technologies may be described below with reference to exemplary 5G NR implementations or in a 5G-centric manner, and 5G terminology may be used as illustrative examples in the following description sections; however, the description is not intended to be limited to 5G applications.

[0040] Furthermore, it should be understood that in operation, wireless communication networks adapted according to the concepts herein can operate with any combination of licensed or unlicensed spectrum, depending on load and availability. Therefore, it will be apparent to those skilled in the art that the systems, apparatuses, and methods described herein can be applied to other communication systems and applications besides the specific examples provided.

[0041] Figure 1 This is a block diagram illustrating details of an exemplary wireless communication system. The wireless communication system may include a wireless network 100. For example, wireless network 100 may include a 5G wireless network. As those skilled in the art will understand, Figure 1 The components appearing in this may have corresponding counterparts in other network arrangements, including, for example, cellular network arrangements and non-cellular network arrangements, such as device-to-device, peer-to-peer, or self-organizing network arrangements.

[0042] Figure 1The illustrated wireless network 100 includes multiple base stations 105 and other network entities. A base station can be a station communicating with a UE and can be referred to as an evolved Node B (eNB), a next-generation eNB (gNB), an access point, etc. Each base station 105 can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" can refer to this specific geographic coverage area of ​​the base station or a base station subsystem serving the coverage area, depending on the context in which the term is used. In the embodiments of the wireless network 100 herein, base stations 105 can be associated with the same operator or different operators, such as the wireless network 100 including multiple operator wireless networks. Furthermore, in the embodiments of the wireless network 100 herein, base stations 105 can use one or more of the same frequencies as neighboring cells, such as licensed spectrum, unlicensed spectrum, or combinations thereof, to provide wireless communication. In some examples, a single base station 105 or UE 115 can be operated by more than one network operating entity. In some other examples, each base station 105 and UE 115 can be operated by a single network operating entity.

[0043] Base stations can provide communication coverage for macro cells, small cells (such as pico cells or femto cells), or other types of cells. Macro cells typically cover a relatively large geographical area (such as a radius of several kilometers) and allow unrestricted access for UEs with service subscriptions to network providers. Small cells, such as pico cells, typically cover a relatively small geographical area and allow unrestricted access for UEs with service subscriptions to network providers. Small cells, such as femto cells, typically also cover a relatively small geographical area, such as a home, and in addition to unrestricted access, provide restricted access for UEs associated with the femto cell (such as UEs in a Closed Subscriber Group (CSG), UEs for home users, etc.). Base stations used for macro cells can be called macro base stations. Base stations used for small cells can be called small cell base stations, pico base stations, femto base stations, or home base stations. Figure 1 In the examples shown, base stations 105d and 105e are conventional macro base stations, while base stations 105a to 105c are macro base stations that have enabled one of 3D, full-dimensional (FD), or massive MIMO. Base stations 105a to 105c utilize their higher-dimensional MIMO capabilities to increase coverage and capacity through 3D beamforming in both elevation and azimuth beamforming. Base station 105f is a small cell base station, which can be a home node or a portable access point. A base station can support one or more cells, such as two cells, three cells, four cells, etc.

[0044] Wireless Network 100 can support synchronous or asynchronous operation. For synchronous operation, base stations can have similar frame timings, and transmissions from different base stations can be roughly aligned in time. For asynchronous operation, base stations can have different frame timings, and transmissions from different base stations may not be aligned in time. In some scenarios, the network can be enabled or configured to handle dynamic switching between synchronous and asynchronous operations.

[0045] UE 115 is distributed throughout the wireless network 100, and each UE can be fixed or mobile. It should be understood that although mobile devices are generally referred to as User Equipment (UE) in standards and specifications issued by the 3rd Generation Partnership Project (3GPP), such devices may be referred to by those skilled in the art as mobile station (MS), user station, mobile unit, user unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile user station, access terminal (AT), mobile terminal, radio terminal, remote terminal, mobile phone, terminal, user agent, mobile client, client, or some other suitable term. Within this document, a “mobile” device or UE does not necessarily have the ability to move and may be stationary. Some non-limiting examples of mobile devices, such as implementations that may include one or more of UE 115, include mobile phones, cellular phones, smartphones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, laptop computers, personal computers (PCs), notebooks, netbooks, smartbooks, tablet computers, and personal digital assistants (PDAs). Mobile devices can also be “Internet of Things” (IoT) or “Internet of Everything” (IoE) devices, such as automobiles or other transportation vehicles, satellite radios, Global Positioning System (GPS) devices, logistics controllers, drones, multi-rotor aircraft, quadcopters, smart energy or security devices, solar panels or solar cells, municipal lighting, water or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as glasses, wearable cameras, smartwatches, health or fitness trackers, mammalian implantable devices, gesture tracking devices, medical devices, digital audio players (such as MP3 players), cameras, game consoles, etc.; and digital home or smart home devices, such as home audio, video and multimedia devices, appliances, sensors, vending machines, smart lighting, home security systems, smart meters, etc. In one aspect, a UE can be a device that includes a Universal Integrated Circuit Card (UICC). In another aspect, a UE can be a device that does not include a UICC. In some aspects, a UE that does not include a UICC can be referred to as an IoE device. Figure 1The UEs 115a to 115d in the illustrated embodiments are examples of mobile smartphone-type devices accessing the wireless network 100. The UE can be a machine specifically configured for connecting to communications, including machine-type communication (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc. Figure 1 The UEs 115e to 115k shown are examples of various machines configured to access communications on the 5G network 100.

[0046] Mobile devices such as the UE 115 can communicate with any type of base station, whether it is a macro base station, pico base station, femto base station, or relay station. Figure 1 In this context, a communication link (represented by a lightning bolt) represents a wireless transmission between a UE and a serving base station, which is a base station designated to serve the UE on the downlink or uplink, or a desired transmission between base stations and a backhaul transmission between base stations. Backhaul communication between base stations of wireless network 100 can occur using wired or wireless communication links.

[0047] In the operation of the 5G network 100, base stations 105a to 105c use 3D beamforming and cooperative spatial technologies (such as Cooperative Multipoint (CoMP) or Multi-Connection) to serve UEs 115a and 115b. Macro base station 105d performs backhaul communication with base stations 105a to 105c, as well as small cell base station 105f. Macro base station 105d also transmits multicast services subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber Alerts or Grey Alerts.

[0048] The wireless network 100 of this implementation supports mission-critical communication with highly reliable and redundant links for mission-critical devices, such as UE 115e as a drone. Redundant communication links with UE 115e include those from macro base stations 105d and 105e, and small cell base station 105f. Other machine-type devices, such as UE 115f (thermometer), UE 115g (smart meter), and UE 115h (wearable device), can communicate directly with base stations such as small cell base station 105f and macro base station 105e via the wireless network 100, or in a multi-hop configuration, via communication with another user device that relays its information to the network; for example, UE 115f transmits temperature measurement information to a smart meter, UE 115g, and then reports it to the network via small cell base station 105f. The 5G network 100 can provide additional network efficiency through dynamic, low-latency TDD / FDD communication, such as in vehicle-to-vehicle (V2V) mesh networks between UEs 115i to 115k communicating with macro base station 105e.

[0049] Figure 2 This is a block diagram conceptually illustrating an exemplary design of base station 105 and UE 115. Base station 105 and UE 115 can be... Figure 1 One of the base stations and one of the UEs. For restricted association scenarios (as described above), base station 105 can be Figure 1 The base station 105f is a small cell base station, and UE 115 can be UE 115c or 115d operating within the service area of ​​base station 105f. In order to access small cell base station 105f, UE 115 will be included in the list of accessible UEs of small cell base station 105f. Furthermore, base station 105 can be some other type of base station. For example... Figure 2 As shown, base station 105 may be equipped with antennas 234a to 234t, and UE 115 may be equipped with antennas 252a to 252r for wireless communication.

[0050] At base station 105, transmit processor 220 can receive data from data source 212 and control information from controller / processor 240. The control information can be used for Physical Broadcast Channel (PBCH), Physical Control Format Indication Channel (PCFICH), Physical Hybrid-ARQ (Automatic Repeat Request) Indication Channel (PHICH), Physical Downlink Control Channel (PDCCH), Enhanced Physical Downlink Control Channel (EPDCCH), MTC Physical Downlink Control Channel (MPDCCH), etc. Data can be used for PDSCH, etc. Transmit processor 220 can process the data and control information (e.g., encoding and symbol mapping) to obtain data symbols and control symbols respectively. Furthermore, transmit processor 220 can generate reference symbols, such as those for primary synchronization signal (PSS) and secondary synchronization signal (SSS) and cell-specific reference signals. Transmit (TX) Multiple-Input Multiple-Output (MIMO) processor 230 can perform spatial processing on data symbols, control symbols, and / or reference symbols (if applicable) and can provide output symbol streams to modulators (MODs) 232a to 232t. For example, spatial processing performed on data symbols, control symbols, or reference symbols may include precoding. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may additionally or alternatively process the output sample stream to obtain a downlink signal. For example, to process the output sample stream, each modulator 232 may convert the output sample stream to analog, amplify, filter, and up-convert it to obtain a downlink signal. The downlink signals from modulators 232a to 232t may be transmitted via antennas 234a to 234t, respectively.

[0051] At UE 115, antennas 252a to 252r can receive downlink signals from base station 105 and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust the corresponding received signal to obtain input samples. For example, to adjust the corresponding received signal, each demodulator 254 can filter, amplify, down-convert, and digitize the corresponding received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain the received symbols from demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receiver processor 258 can process the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller / processor 280. For example, in order to process the detected symbols, the receiver processor 258 can demodulate, deinterleave, and decode the detected symbols.

[0052] On the uplink, at UE 115, the transmitting processor 264 can receive and process data from data source 262 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 280 (e.g., for the Physical Uplink Control Channel (PUCCH)). Additionally, the transmitting processor 264 can generate reference symbols for reference signals. Symbols from the transmitting processor 264 can be pre-encoded by the TX MIMO processor 266 (if applicable), further processed by demodulators 254a to 254r (e.g., for SC-FDM), and transmitted to base station 105. At base station 105, the uplink signal from UE 115 can be received by antenna 234, processed by modulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiving processor 238 to obtain decoded data and control information transmitted by UE 115. The receiver processor 238 can provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240.

[0053] Controllers / processors 240 and 280 can respectively direct operations at base station 105 and UE 115. The controller / processor 240 or other processors and modules at base station 105 or the controller / processor 280 or other processors and modules at UE 115 can perform or direct the execution of various processes of the techniques described herein, such as performing or directing... Figures 3 to 7The execution shown herein or other processes of the technology described herein. Memory 242 and 282 may store data and program code for base station 105 and UE 115, respectively. Scheduler 244 may schedule the UE for data transmission on the downlink and / or uplink.

[0054] In some cases, UE 115 and base station 105 may operate in a shared radio spectrum band, which may include licensed or unlicensed spectrum, such as contention-based spectrum. In the unlicensed frequency portion of the shared radio spectrum band, UE 115 or base station 105 may conventionally perform a medium sensing process to compete for access to the spectrum. For example, UE 115 or base station 105 may perform a Listen-Before-Speak or Listen-Before-Transmit (LBT) process, such as Open Channel Assessment (CCA), before communication to determine whether a shared channel is available. CCA may include an energy detection process to determine if any other active transmissions are present. For example, the apparatus may infer that a change in the Received Signal Strength Indication (RSSI) of a power meter indicates that the channel is occupied. Specifically, a signal power concentrated in a certain bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. In some implementations, CCA may include detecting a specific sequence indicating channel usage. For example, another apparatus may transmit a specific preamble before transmitting a data sequence. In some cases, the LBT process may include the wireless node adjusting its own backoff window based on the amount of energy detected on the channel or as a collision representative, using ACK / NACK feedback on the packets it transmits.

[0055] In some wireless communication systems, after determining the uplink (UL) beam (e.g., beam direction, beam weight, etc.) and UL scheduling (e.g., resource allocation, transmission format, modulation and coding scheme (MCS), number of layers, etc.), the UE typically transmits one or more Sounding Reference Signals (SRSs) to the base station. The base station determines one or more UL beams for scheduling based on the channel gain of one or more SRSs (e.g., the base station selects the beam of the SRS with the highest channel gain). The base station then indicates the selected beam in the UL scheduling authorization, and the UE needs to transmit UL data channels (such as the Physical Uplink Shared Channel (PUSCH)) via the specified UL beam. In current fifth-generation (5G) wireless communication standards, the base station configures SRS resources for the UE in Radio Resource Control (RRC) signaling, such that each SRS resource has an attribute—a spatial relation information attribute—that contains an index to only one reference signal. If the UE is instructed to transmit an SRS in a particular SRS resource, the UE should use the beam corresponding to the indicated reference signal. For example, if a Synchronization Signal Block (SSB) index or Channel State Information Reference Signal (CSI-RS) index is included, the UE transmits SRS along the beam used to receive the SSB or CSI-RS in the corresponding SSB resource or CSI-RS resource. If an SRS resource is included, the UE transmits SRS along the beam used to transmit SRS in the corresponding SRS resource.

[0056] In the Physical Downlink Shared Channel (PDSCH) configuration message, the base station can indicate multiple Transport Configuration Information (TCI) states. TCI states include one or more Quasi-Cooperative Positioning (QCL) messages. Each QCL message is associated with a cell ID, a Bandwidth Part (BWP) ID, a reference signal identifier (such as an SSB index or CSI-RS resource ID), and a QCL type. Different QCL types imply different degrees of cooperative positioning between the PDSCH and the associated reference signal (e.g., QCL-D type implies receiving the PDSCH and the associated reference signal using the same Spatial Reception (RX) parameters, such as the same RX beam).

[0057] Current 5G wireless communication standards discuss transmission in multiple Transport Receiver Points (TRPs). For example, a base station can connect to multiple geographically distributed TRPs, and these TRPs can individually or jointly transmit signals to or receive signals from one or more UEs. To further illustrate, a base station can transmit signals to UEs from different TRPs on multiple PDSCH links, which can enhance diversity gain, downlink (DL) system capacity, and / or DL ​​cell coverage. UEs communicating with multiple TRPs can be equipped with multiple panels (e.g., antenna panels), such that one panel is used to point at one TRP.

[0058] 5G wireless networks promise to provide ultra-high data rates and support a wide range of application scenarios. Wireless full-duplex (FD) is a technology that improves link capacity by enabling radio network nodes to transmit and receive simultaneously on the same frequency band and in the same time slot (compared to half-duplex communication, where transmission and reception differ in time or frequency). An emerging technology is the UE with FD capability, or FD UE, which is configured to transmit and receive radio signals simultaneously using the same time and frequency resources. If implemented, FD mode at the UE improves the aggregated DL and UL throughput at the UE. One challenge in FD communication at the UE is self-interference from UL to DL. Some self-interference can be eliminated by combining beamforming, analog cancellation, digital cancellation, and antenna cancellation techniques.

[0059] An example of a UE operating in FD mode is a base station equipped with multiple TRPs. Each TRP can transmit or receive signals to / from the UE. For example, a base station can use two TRPs to communicate with an FD UE (e.g., the UE is equipped with multiple panels so it can operate in FD mode). One panel is used to receive signals from one TRP (called a DL TRP), while another panel is used to transmit signals to another TRP (called a UL TRP). Transmit and receive operations are performed in FD (e.g., frequency and time overlap). Due to different product designs and hardware / software implementations, the ability of each UE with FD capability to mitigate self-interference may differ. For example, in some cases, the capability is fixed, while in others, the capability varies with the UE's transmit power, transmit bandwidth, transmit beamforming (e.g., precoding) weights, or other factors.

[0060] Another difficulty in mitigating self-interference is currently preventing FD-enabled UEs from receiving signals. For example, as mentioned above, when scheduling a UL beam for a UE, only the UL gain of the target link is considered. To illustrate, the base station can send an SRS configuration message to the UE, which indicates spatial relationship parameters to guide the UE in transmitting SRS. The UE then transmits SRS with the determined SRS beam based on a reference signal received from the base station and associated with the spatial relationship parameters in the SRS configuration message. Furthermore, the PUSCH signal selected to be transmitted along with the SRS beam only considers enhancing the target link (e.g., increasing the UL gain). When the UE is operating in FD mode, considering only the UL gain when selecting the UL beam causes strong self-interference in the received DL signal from the DL TRP. This self-interference can lead to DL transmission failures and reduce DL throughput in FD mode.

[0061] This disclosure provides systems, apparatus, methods, and computer-readable media for reducing (or eliminating) self-interference from the uplink (UL) channel to the downlink (DL) channel for a full-duplex (FD) UE, thereby enabling FD communication at the UE. For example, the techniques described herein provide a reference signal transmission scheme for the FD UE that enables the FD UE to determine a UL reference signal beam that not only enhances the gain of the UL channel but also reduces self-interference to the DL channel. Determining the UE reference signal and the UL beam through which the reference signal is transmitted reduces self-interference with the DL signal at the UE, thereby enabling FD communication at the UE and improving DL throughput in FD mode, and reducing (or eliminating) DL transmission failures in FD mode.

[0062] Figure 3 This is a block diagram illustrating an exemplary wireless communication system 300 for enabling a UE to operate in FD mode with reduced (or eliminated) self-interference. In some instances, wireless communication system 300 may implement aspects of wireless network 100. Wireless communication system 300 includes UE 115 and network entity 350. As an illustrative, non-limiting example, network entity 350 may include or correspond to base station 105, network, network core, or another network device. Although one UE and one network entity are shown, in some other embodiments, wireless communication system 300 may include more than one UE, more than one network entity, or a combination thereof. As described herein, this disclosure provides a process and technique for a UE to operate in FD mode with reduced (or eliminated) self-interference. Thus, UE 115 can select a UL transmission beam for transmitting FD reference signals, striking a balance between the competing benefit of improved UL signal quality and reduced self-interference with the DL reception beam at UE 115.

[0063] UE 115 may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include processor 302, memory 304, transmitter 316, receiver 318, and beam selector 320. Processor 302 may be configured to execute instructions stored in memory 304 to perform the operations described herein. In some embodiments, processor 302 includes or corresponds to controller / processor 280, and memory 304 includes or corresponds to memory 282.

[0064] Memory 304 may include a signal-to-interference-plus-noise ratio (SINR) 306, self-interference 308 (e.g., self-interference measurement), correlation coefficient 310, or a combination thereof. As further described herein, SINR 306 may be generated based on a first reference signal received via a receive beam (e.g., a first synchronization block (SSB) or a first channel state information reference signal (CSI-RS)). As further described herein, self-interference 308 may be determined by measuring interference caused to the reference signal (e.g., SSB or CSI-RS) received via the receive beam, said interference being caused by a transmitted signal transmitted via a transmit beam. As further described herein, correlation coefficient 310 may be between the transmit beam used for transmitting signals and the transmit beam used for transmitting SRS in the SRS resource.

[0065] Transmitter 316 is configured to transmit data to one or more other devices, and receiver 318 is configured to receive data from one or more other devices. For example, transmitter 316 may transmit data, and receiver 318 may receive data via a network, such as a wired network, a wireless network, or a combination thereof. For example, UE 115 may be configured to transmit or receive data via a direct device-to-device connection, a local area network (LAN), a wide area network (WAN), a modem-to-modem connection, the Internet, an intranet, an extranet, a cable transmission system, a cellular communication network, any combination of the above, or any other communication network now known or developed hereafter that allows communication between two or more electronic devices. In some embodiments, transmitter 316 and receiver 318 may be replaced by a transceiver. Additionally or alternatively, transmitter 316, receiver 318, or both may include and correspond to references. Figure 2 One or more components of the UE 115 described.

[0066] Beam selector 320 is configured to select a UL transmit beam for transmitting a reference signal to network entity 350. For example, as further described herein, beam selector 320 may be configured to select a UL transmit beam based on a resource configuration message (by determining or selecting from a plurality of pre-configured UL transmit beams).

[0067] UE 115 may include multiple panels (e.g., antenna panels) for supporting FD communication. For example, UE 115 may include a first panel (e.g., a UL panel) configured to transmit one or more signals to network entity 350 and a second panel (e.g., a DL panel) configured to receive one or more signals from network entity 350. The panels may be configured such that corresponding signals use at least some of the same time and frequency resources. For example, at least a portion of the signal transmitted by the first panel may overlap in time with at least a portion of the signal transmitted by the second panel, at least a portion of the signal transmitted by the first panel may overlap in frequency with at least a portion of the signal received by the second panel, or both. In this way, FD communication can be supported at UE 115.

[0068] Network entity 350 may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include processor 352, memory 354, transmitter 356, receiver 358, beam selector 360, and receive (RX) performance determiner 362. Processor 352 may be configured to execute instructions stored in memory 354 to perform the operations described herein. In some embodiments, processor 352 includes or corresponds to controller / processor 240, and memory 354 includes or corresponds to memory 242.

[0069] Transmitter 356 is configured to transmit data to one or more other devices, and receiver 358 is configured to receive data from one or more other devices. For example, transmitter 356 may transmit data, and receiver 358 may receive data via a network, such as a wired network, a wireless network, or a combination thereof. For example, network entity 350 may be configured to transmit or receive data via a direct device-to-device connection, LAN, WAN, modem-to-modem connection, the Internet, an intranet, an extranet, a cable transmission system, a cellular communication network, any combination of the foregoing, or any other communication network now known or developed hereafter that allows communication between two or more electronic devices. In some embodiments, transmitter 356 and receiver 358 may be replaced by transceivers. Additionally or alternatively, transmitter 356, receiver 358, or both may include and correspond to references. Figure 2 One or more components of the described base station 105.

[0070] Beam selector 360 is configured to select a UL transmit beam, a DL receive beam, or both, for scheduling of UE 115. For example, as further described herein, beam selector 360 may be configured to select the UL transmit beam based on a reference signal received from UE 115. Additionally, as further described herein, beam selector 360 may be configured to select the DL receive beam based on parameters of a resource configuration message. RX performance determiner 362 is configured to determine RX performance at network entity 350. For example, as further described herein, RX performance determiner 362 may be configured to determine RX performance based on the UL transmit beam used to transmit the reference signal from UE 115 to network entity 350.

[0071] Network entity 350 can be coupled to one or more Transmit-Receive Points (TRPs). One or more TRPs are configured to transmit or receive signals to or from one or more other devices, individually or jointly. If multiple TRPs are used to send data to a single device (e.g., UE 115), data can be transmitted via multiple Physical Downlink Shared Channels (PDSCHs), which improves diversity gain, DL system capacity, and / or DL ​​cell coverage. Figure 3 In this example, network entity 350 is coupled to a first TRP 364 and a second TRP 366. TRPs 364 to 366 can be configured to transmit or receive signals. For example, the first TRP 364 can be a UL TRP configured to receive signals from one or more other devices (such as UE 115) and provide the received signals to network entity 350. Additionally, the second TRP 366 can be a DL TRP configured to receive signals from network entity 350 and transmit signals to one or more other devices, such as UE 115.

[0072] In some implementations, the wireless communication system 300 includes a 5G network. For example, UE 115 may include a 5G UE, such as a UE configured to operate according to a 5G network. Network entity 350 may include a 5G base station, such as a base station configured to operate according to a 5G network.

[0073] During the operation of the wireless communication system 300, network entity 350 generates a resource configuration message 370. In some embodiments, the resource configuration message 370 includes or corresponds to an SRS resource configuration message. The resource configuration message 370 includes (or indicates) a first parameter 372 and a second parameter 374. The first parameter 372 corresponds to FD UL, and the second parameter 374 corresponds to FD DL. The resource configuration message 370 for selecting a reference signal for the corresponding reference signal resource by UE115 should increase (or maximize) the gain of the UL channel based on the first parameter 372 for the UL TRP (e.g., the first TRP 364), while reducing (or minimizing) self-interference to the DL channel based on the second parameter 374 for the DL TRP (e.g., the second TRP 366).

[0074] In some implementations, the first parameter 372 includes a spatial relation parameter, and the second parameter 374 includes a Transmission Configuration Information (TCI) parameter, or both. The spatial relation parameter may correspond to an FD UL, while the TCI parameter may correspond to an FD DL. In some implementations, the spatial relation parameter (e.g., the first parameter 372) includes or indicates an identifier for a first Synchronization Signal Block (SSB) resource, an identifier for a first Channel State Information Reference Signal (CSI-RS) resource, or an identifier for an SRS resource. Alternatively or concurrently, the TCI parameter (e.g., the second parameter 374) may include or indicate an identifier for a second SSB resource or a second CSI-RS resource. As further described herein, UE 115 may use the spatial relation parameter and the TCI parameter to determine the reference signal to be transmitted to network entity 350.

[0075] In some implementations, resource configuration message 370 also includes a threshold 376. Threshold 376 may be a self-interference strength threshold. In some implementations, the self-interference strength threshold (e.g., threshold 376) includes an absolute power value. For example, threshold 376 may include an absolute power value, such as -160 dBm as a non-limiting example, indicating that the self-interference power from UL to DL should not exceed -160 dBm per physical resource block (PRB). In some other implementations, the self-interference strength threshold (e.g., threshold 376) includes a relative power value. For example, threshold 376 may include a relative power value, such as 3 dB as a non-limiting example, indicating that the self-interference power from UL to DL should not exceed the non-FD mode interference power plus 3 dB. In the examples described, non-FD mode refers to an operation in which only DL data transmission is performed without concurrent UL data transmission by the same UE.

[0076] After generating resource configuration message 370, network entity 350 sends resource configuration message 370 to UE 115, and UE 115 receives resource configuration message 370 from network entity 350. In some embodiments, resource configuration message 370 is included in a Radio Resource Control (RRC) signaling message. In some other embodiments, resource configuration message 370 is included in a Media Access Control (MAC) control element (MAC CE). In some other embodiments, resource configuration message 370 is included in downlink control information (DCI). In some other embodiments, resource configuration message 370 is included in a combination of RRC signaling message, MAC CE, and / or DCI.

[0077] UE 115 generates an FD reference signal 378 based on resource configuration message 370. In some embodiments, the FD reference signal 378 includes or corresponds to an SRS. In addition to generating the FD reference signal 378, UE 115 determines (e.g., selects) a transport beam based on resource configuration message 370. The transport beam is used to transmit the FD reference signal 378 from UE 115 to network entity 350. In some embodiments, determining the transport beam includes determining one or more parameters of the transport beam. In some other embodiments, determining the transport beam includes selecting a transport beam from a plurality of pre-configured transport beams. For example, a plurality of pre-configured transport beams may be programmed at UE 115, and UE 115 may select one of the pre-configured transport beams based on resource configuration message 370.

[0078] In some implementations, a first parameter 372 (e.g., a spatial relation parameter) indicates a first SSB resource or a first CSI-RS resource, and a second parameter 374 (e.g., a TCI parameter) indicates a second SSB resource or a second CSI-RS resource. Resources may correspond to signals transmitted from network entity 350 to UE 115. For example, network entity 350 may transmit a reference signal 380 to UE 115. Reference signal 380 may include a first SSB in the first SSB resource or a first CSI-RS in the first CSI-RS resource. Alternatively, reference signal 380 may include a second SSB in the second SSB resource or a second CSI-RS in the second CSI-RS resource. In some such implementations, as part of the process of determining a transmission beam (e.g., the UL beam through which FD reference signal 378 is transmitted), UE 115 (e.g., beam selector 320) may determine a second receive beam to receive a second SSB transmitted by network entity 350 in the second SSB resource or a second CSI-RS transmitted by network entity 350 in the second CSI-RS resource. For example, beam selector 320 may determine a second receive beam to receive a second reference signal (e.g., a second SSB or a second CSI-RS) in reference signal 380. The second receive beam may be the “most suitable” receive beam for receiving the second SSB or the second CSI-RS (e.g., the receive beam that best increases DL gain or another parameter of the second SSB or the second CSI-RS). In some such implementations, UE 115 (e.g., beam selector 320) selects a first receive beam for receiving either a first SSB transmitted by network entity 350 in the first SSB resource or a first CSI-RS transmitted by network entity 350 in the first CSI-RS resource. The first receive beam may have the same beam weight, the same beam direction, or both as the transmit beam (e.g., the UL beam for transmitting FD reference signal 378). For example, beam selector 320 may determine a first receiving beam having the same beam weight, the same beam direction, or both, as the transmission beam selected by beam selector 320, to receive a first reference signal (e.g., a first SSB or a first CSI-RS) in reference signal 380. In some such embodiments, the transmission beam is selected such that the signal-to-interference-plus-noise ratio (SINR) 306 generated by the first SSB or first CSI-RS received via the first receiving beam is maximized. The transmission beam may be further selected such that the self-interference 308 caused by the transmission signal transmitted via the transmission beam to the second SSB or second CSI-RS received via the second receiving beam is less than a threshold.For example, beam selector 320 can select a transmit beam such that the generated SINR 306 of the first SSB or first CSI-RS increases (or is maximized), while ensuring that the self-interference 308-RS caused by the transmit beam to the second SSB or second CSI is less than a threshold 376. Selecting the transmit beam may include determining the SINR 306 of one or more potential transmit beams, determining the self-interference 308 of one or more potential transmit beams, or both. For example, selecting the transmit beam may include an iterative process, generating and solving one or more equations, another process, or a combination thereof.

[0079] In some other implementations, the first parameter 372 (e.g., a spatial relation parameter) includes or indicates an SRS resource, and the second parameter 374 (e.g., a TCI parameter) includes or indicates an SSB resource or a CSI-RS resource. Resources may correspond to signals transmitted by network entity 350 to UE 115. For example, network entity 350 may transmit a reference signal 380 to UE 115. Reference signal 380 may include an SRS resource. Alternatively, reference signal 380 may include an SSB in an SSB resource or a CSI-RS in a CSI-RS resource. In some such implementations, as part of the process of determining a transmission beam (e.g., the UL beam through which the FD reference signal 378 is transmitted), UE 115 (e.g., beam selector 320) may determine a receive beam to receive either an SSB transmitted by network entity 350 in an SSB resource or a CSI-RS transmitted by network entity 350 in a CSI-RS resource. For example, beam selector 320 can select a receive signal to receive a second reference signal (e.g., SSB or CSI-RS) in reference signal 380. The receive beam can be the "most suitable" receive beam for receiving SSB or CSI-RS (e.g., the receive beam that maximizes DL gain or another parameter of SSB or CSI-RS). In some such implementations, the transmit beam is selected such that the correlation coefficient 310 between the transmit beam and another transmit beam used by UE 115 to transmit SRS in SRS resources is minimized. Furthermore, the transmit beam is further selected such that the self-interference 308 caused by the transmit signal transmitted via the transmit beam to the SSB or CSI-RS received via the receive beam is less than a threshold. For example, beam selector 320 can select a transmit beam (for transmitting FD reference signal 378) to reduce (or minimize) the correlation coefficient 310 between the transmit beam and another transmit beam used to transmit SRS, while ensuring that the self-interference 308 caused by the transmit beam to the SSB or CSI-RS is less than a threshold 376. Selecting a transmission beam may include determining the self-interference 308 of one or more potential transmission beams, determining the correlation coefficients 310 of one or more potential transmission beams, or both. For example, selecting a transmission beam may include an iterative process, generating and solving one or more equations, another process, or a combination thereof.

[0080] After selecting a transmission beam, UE 115 transmits the FD reference signal 378 to network entity 350 via the selected transmission beam. In some embodiments, the FD reference signal 378 is received via a TRP that is different from the one used to transmit the resource configuration message 370 and coupled to network entity 350. For example, the FD reference signal 378 may be transmitted from UE 115 to a first TRP 364 (and received by the first TRP 364 for provision to network entity 350), and the resource configuration message 370 may be transmitted by (and received from) a second TRP 366. In some such embodiments, the first TRP 364 is a UL TRP and the second TRP 366 is a DL TRP. In other embodiments, the first TRP 364 may be a DL TRP and the second TRP 366 may be a UL TRP.

[0081] In some implementations, the FD reference signal 378 is transmitted once in response to receiving the resource configuration message 370. For example, UE 115 may receive the resource configuration message 370 and, during processing, determine to transmit the FD reference signal 378 once to network entity 350 (e.g., to a TRP coupled to network entity 350). In some other implementations, UE 115 is configured to transmit the FD reference signal 378 multiple times to network entity 350. For example, UE 115 may transmit the FD reference signal 378 periodically. The resource configuration message 370 may indicate parameters associated with the timing between transmissions of the FD reference signal 378. For example, the resource configuration message 370 may indicate the periodicity (e.g., period length) between consecutive transmissions of the FD reference signal 378. In some such implementations, UE 115 does not begin transmitting the FD reference signal 378 until an activation message is received. For example, UE 115 may receive the activation message from network entity 350, and UE 115 may activate the transmission of the FD reference signal 378 in response to receiving the activation message. Alternatively, if a deactivation message is received, UE 115 may stop transmitting FD reference signal 378. For example, UE 115 may receive a deactivation message from network entity 350, and UE 115 may deactivate the transmission of FD reference signal 378 in response to receiving the deactivation message.

[0082] In response to receiving the FD reference signal 378, network entity 350 may determine one or more UL beams to schedule UE 115 for UL communication, determine one or more DL beams to schedule UE 115 for DL ​​communication, or both. Scheduling both UL and DL beams enables UE 115 to communicate in FD mode.

[0083] In some implementations, network entity 350 (e.g., beam selector 360) selects the UL transmission beam for the UE for FD UL transmission based on FD reference signal 378. Network entity 350 (e.g., beam selector 360) may further select the DL receive beam for FD DL transmission based on a second parameter 374. For example, beam selector 360 may select the transmission beam associated with the transmission of FD reference signal 378 as the UL transmission beam for FD UL transmission, and beam selector 360 may select the DL receive beam corresponding to the configuration of SSB or CSI-RS indicated by the second parameter 374 as the DL receive beam for FD DL transmission. In some implementations, beam selector 360 selects the UL transmission beam at least in part based on UL receive performance. For example, RX performance determiner 362 may determine UL receive performance based on a specific UL beam through which it receives FD reference signal 378. UL reception performance can be based on UL gain, signal-to-noise ratio (SNR), SINR, signal strength, UL throughput, other factors, or a combination thereof. Network entity 350 (e.g., beam selector 360) compares the UL reception performance determined by RX performance determiner 362 with a threshold. If the UL reception performance meets (e.g., is greater than or equal to) the threshold, beam selector 360 selects a specific UL beam (e.g., the UL beam corresponding to FD reference signal 378) as the scheduled UL transmission beam. As further described herein, if the UL reception performance fails to meet the threshold, beam selector 360 can select a different UL beam for scheduling or can select only the DL beam for scheduling.

[0084] After selecting the UL transmit beam for FD UL transmission and the DL receive beam for FD DL transmission, the network entity generates UL scheduling authorization 382 and DL scheduling authorization 386. UL scheduling authorization 382 indicates UL beam 384 (e.g., the selected UL transmit beam). DL scheduling authorization 386 indicates DL beam 388 (e.g., the selected DL receive beam). As described above, UL beam 384 is the transmit beam based on resource configuration message 370, and DL beam 388 is the receive beam based on resource configuration message 370, or both.

[0085] Network entity 350 sends UL scheduling grant 382 and DL scheduling grant 386 to UE 115. UE 115 receives and processes UL scheduling grant 382 and DL scheduling grant 386 to determine when and via which beams to schedule UE 115 to transmit UL signals and receive DL signals. After receiving UL scheduling grant 382 and DL scheduling grant 386, UE 115 transmits a first signal 390 (e.g., a UL signal) to network entity 350 and UE 115 receives a second signal 392 (e.g., a DL signal) from network entity 350. For example, UE 115 may transmit the first signal 390 to a first TRP 364 coupled to network entity 350, and UE 115 may receive the second signal 392 from a second TRP 366 coupled to network entity 350. The transmission of the first signal 390 and the reception of the second signal 392 use at least some of the same time and frequency resources. For example, the transmission of the first signal 390 and the reception of the second signal 392 may (e.g., at least partially simultaneously) overlap in time, frequency, or both. In this way, network entities with multiple TRPs can enable FD communication at UE 115.

[0086] If the UL reception performance corresponding to the UL beam used to transmit the FD reference signal 378 fails to meet a threshold, non-FD communication can be enabled at UE 115. In some implementations, network entity 350 (e.g., beam selector 360) can determine that the UL reception performance fails to meet the threshold based on a specific UL beam through which it receives the FD reference signal 378, and in response to this determination, network entity 350 can schedule a DL reception beam for UE 115 based on a second parameter 374. For example, beam selector 360 can select a DL reception beam based on an SSB or CSI-RS indicated by the second parameter 374. Furthermore, in response to determining that the UL reception performance fails to meet the threshold, network entity 350 can prevent the scheduling of a UL transmission beam for UE 115. For example, network entity 350 can only transmit DL scheduling grant 386 (and prevent the transmission of UL scheduling grant 382), and in response, UE 115 can only receive a second signal 392 from network entity 350 during a specific time period and via a specific frequency. In some other implementations, network entity 350 (e.g., beam selector 360) may determine that UL reception performance fails to meet a threshold based on a specific UL beam via which it receives FD reference signal 378, and in response to this determination, network entity 350 may schedule UL transmission beams for UE 115 based on UL beams with non-FD reference signals. Non-FD reference signals may refer to SRS that does not consider reducing self-interference at UE 115. Furthermore, in response to determining that UL reception performance fails to meet the threshold, network entity 350 may prevent scheduling DL reception beams for UE 115. For example, network entity 350 may only send UL scheduling grant 382 (and prevent sending DL scheduling grant 386), and in response, UE 115 may only send a first signal 390 to network entity 350 during a specific time period and via a specific frequency. In this way, if the UL beam selected based on reducing self-interference at UE 115 fails to meet the UL performance threshold, only non-FD communication can be enabled at UE 115.

[0087] therefore, Figure 3A technique for enabling FD communication at UE 115 is described. For illustration, network entity 350 sends a resource configuration message 370 to UE 115, and based on the resource configuration message 370, UE 115 determines an FD reference signal 378 (and the corresponding UL transmission beam). The selection of the FD reference signal 378 and the corresponding UL transmission beam improves (e.g., maximizes) not only the UL gain for network entity 350 but also reduces (e.g., minimizes) self-interference with DL at UE 115. Reducing (or minimizing or eliminating) self-interference reduces (or eliminates) DL transmission failures and improves DL throughput in FD mode. Therefore, compared to wireless communication systems that do not consider self-interference when selecting the reference signal and the corresponding UL transmission beam, the aggregated UL and DL throughput in FD mode at UE 115 is improved.

[0088] Figure 4 This is a ladder diagram illustrating an exemplary wireless communication system that enables a UE to operate in FD mode with reduced (or eliminated) self-interference. Figure 4 This includes UE 115, first TRP 364 (e.g., UL TRP), second TRP 366 (e.g., DL TRP), and network entity 350. In some instances, Figure 4 The wireless communication system can implement various aspects of wireless communication systems 100 or 300. It is also envisioned that... Figure 4 Alternative instances may include steps performed in a different order than described, or not at all. In some cases, steps may include additional features not mentioned below, or additional steps may be added.

[0089] refer to Figure 4 At position 410, network entity 350 sends a resource configuration message to UE 115. (See reference...) Figure 3 The resource configuration message, as explained, may include a first parameter corresponding to the FD UL and a second parameter corresponding to the FD DL. In some implementations, the first parameter includes a spatial relation parameter and the second parameter includes a TCI parameter.

[0090] At 412, UE 115 determines the FD reference signal and the corresponding UL beam that will transmit the FD reference signal via it based on the resource configuration message. (See reference...) Figure 3As explained, UE 115 can determine the FD reference signal and the corresponding UL beam such that the UL gain at network entity 350 is improved (e.g., maximized) while ensuring that self-interference to the DL beam caused by the UL beam is reduced (e.g., minimized). For example, the FD reference signal and UL beam can be selected such that SINR 306 increases (e.g., maximized) while self-interference 308 decreases (e.g., minimized). As another example, the FD reference signal and UL beam can be selected such that correlation coefficient 310 decreases (e.g., minimized) while self-interference 308 decreases (e.g., minimized). The selection can be based on the interaction of the UL beam with the SSB or CSI-RS sent by network entity 350 (and indicated by the resource configuration message).

[0091] At 414, UE 115 transmits the FD reference signal to the first TRP364 via the selected UL beam. The first TRP364 can provide the FD reference signal (and beam information) to network entity 350.

[0092] At 416, network entity 350 determines the UL beam and DL beam for FD. For example, if the UL performance of the UL beam meets a threshold, network entity 350 can select the UL beam used to transmit the FD reference signal as the selected UL beam. Furthermore, network entity 350 can select the DL beam based on the beam associated with the SSB or CSI-RS indicated by the second parameter of the resource configuration message.

[0093] At 418, network entity 350 generates a UL scheduling grant and a DL scheduling grant and sends them to UE 115. The UL scheduling grant indicates the UL beam for UL communications to be scheduled, while the DL scheduling grant indicates the DL beam for DL ​​communications to be scheduled.

[0094] In response to receiving UL scheduling authorization and DL scheduling authorization, FD mode is enabled at UE 115. For example, at 420, UE 115 performs UL data transmission with the first TRP 364 (e.g., sends UL signals to it). Additionally, at 422, UE 115 performs DL data transmission with the second TRP 366 (e.g., receives DL signals from it). UL data transmission and DL data transmission can use at least some of the same time and frequency resources. For example, UL data transmission can overlap with DL data transmission in the time domain, frequency domain, or both (e.g., at least partially simultaneously with it). In this way, UE 115 is able to perform FD communication. Furthermore, FD communication is improved compared to other wireless communication systems because the FD reference signal and the corresponding UL beam are selected to account for and reduce (e.g., minimize) self-interference with the DL signal at UE 115.

[0095] Figure 5 This is a flowchart illustrating an exemplary procedure for communication performed by a UE. For example, according to some aspects of this disclosure, exemplary blocks of the procedure can cause the UE to send an FD reference signal to a network entity. Figure 7 As shown, an exemplary block will also be described for UE 115. Figure 7 This is a conceptual block diagram illustrating the design of the UE. According to one aspect of this disclosure, Figure 7 The UE can be configured to send FD reference signals to network entities. UE 115 includes features such as those for... Figure 2 or Figure 3 The UE 115 illustrates the structure, hardware, and components. For example, UE 115 includes a controller / processor 280 that operates to execute logical or computer instructions stored in memory 282, and components that control UE 115 to provide its features and functions. Under the control of the controller / processor 280, UE 115 transmits and receives signals via radio devices 701a to 701r and antennas 252a to 252r. Radio devices 701a to 701r include various components and hardware, such as... Figure 2 As shown for UE 115, it includes modulators / demodulators 254a to 254r, MIMO detector 256, receiver processor 258, transmitter processor 264, and TX MIMO processor 266.

[0096] As shown in the figure, memory 282 may include signal receiving (RX) logic 702, signal transmitting (TX) logic 703, and beamformer 704. In some aspects, signal RX logic 702, signal TX logic 703, beamformer 704, or combinations thereof may include or correspond to processor 302. UE 115 may receive signals from or transmit signals to one or more network entities, such as base station 105, network entities, core network, core network devices, or similar entities. Figure 8 The network entities shown.

[0097] refer to Figure 5 A flowchart illustrating an exemplary process 500 for UE operation for communication is shown. In some embodiments, process 500 may be performed by UE 115. In some other embodiments, process 500 may be performed by a device configured for wireless communication. For example, the device may include at least one processor and memory coupled to the processor. The processor may be configured to perform the operation of process 500. In some other embodiments, process 500 may be performed or carried out using a non-transitory computer-readable medium on which program code is recorded. The program code may be computer-executable program code for causing a computer to perform the operation of process 500.

[0098] As shown in block 502, the User Equipment (UE) receives a resource configuration message from a network entity. The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). As an example of block 502, UE 115 can use radios 701a to 701r and antennas 252a to 252r to receive the resource configuration message. To further illustrate, UE 115 can execute signal RX logic 702 stored in memory 282 under the control of controller / processor 280. The execution environment of signal RX logic 702 provides the functionality to receive the resource configuration message from the network entity. The resource configuration message includes a first parameter corresponding to FD UL and a second parameter corresponding to FD DL.

[0099] At block 504, the UE transmits an FD reference signal to a network entity based on a resource configuration message. As an example of block 504, the UE 115 can use radio devices 701a to 701r and antennas 252a to 252r to transmit the FD reference signal. To further illustrate, the UE 115 can execute signal TX logic 703 stored in memory 282 under the control of the controller / processor 280. The execution environment of signal TX logic 703 provides the functionality to transmit the FD reference signal to a network entity based on a resource configuration message. In some implementations, the UE 115 determines the UL transmission beam via which the FD reference signal is transmitted based on the resource configuration message. For example, the UE 115 can execute a beam determiner 704 stored in memory 282 under the control of the controller / processor 280. The execution environment of beam determiner 704 provides the functionality to determine the UL transmission beam via which the FD reference signal is transmitted based on the resource configuration message.

[0100] In some embodiments, process 500 may include a resource configuration message including a sounding reference signal (SRS) resource configuration message and an FD reference signal including an SRS. Alternatively or additionally, the first parameter includes a spatial relation parameter, the second parameter includes a transport configuration information (TCI) parameter, or a combination thereof. In some such embodiments, the spatial relation parameter includes an identifier of a first synchronization block (SSB) resource, an identifier of a first channel state information reference signal (CSI-RS) resource, or an identifier of a sounding reference signal (SRS) resource. In some such embodiments, the TCI parameter includes an identifier of a second SSB resource or an identifier of a second CSI-RS resource.

[0101] In some implementations, the resource configuration message also indicates a self-interference strength threshold. In some such implementations, the self-interference strength threshold includes an absolute power value or a relative power value. Alternatively or additionally, the resource configuration message is included in a Radio Resource Control (RRC) signaling message, a Media Access Control (MAC) CE, a Downlink Control Information (DCI), or a combination thereof.

[0102] In some implementations, process 500 further includes determining a transmission beam at the UE based on a resource configuration message. The FD reference signal is transmitted via the transmission beam. In some such implementations, determining the transmission beam includes selecting a transmission beam from a plurality of pre-configured transmission beams. In some such implementations, a first parameter indicates a first synchronization signal block (SSB) resource or a first channel state information reference signal (CSI-RS) resource, and a second parameter indicates a second SSB resource or a second CSI resource. In some such implementations, process 500 further includes determining a second receive beam at the UE to receive a second SSB transmitted by a network entity in the second SSB resource or a second CSI-RS transmitted by a network entity in the second CSI-RS resource. In some such implementations, process 500 further includes receiving a first SSB transmitted by a network entity in the first SSB resource or a first CSI-RS transmitted by a network entity in the first CSI-RS resource via a first receive beam. The first receive beam has the same beam weight, the same beam direction, or both as the transmission beam. In some implementations, the transmit beam is selected such that the signal-to-interference-plus-noise ratio (SINR) of the generated first SSB or first CSI-RS received via the first receive beam is maximized. Alternatively, the first parameter indicates a sounding reference signal (SRS) resource, and the second parameter indicates a synchronization signal block (SSB) resource or a channel state information reference signal (CSI-RS) resource. In some implementations, process 500 further includes determining a receive beam at the UE to receive an SSB transmitted by a network entity in an SSB resource or a CSI-RS transmitted by a network entity in a CSI-RS resource. In some implementations, the transmit beam is selected such that the correlation coefficient between the UE's transmit beam and the transmit beam used by the UE to transmit SRS in the SRS resource is minimized. In some implementations, the transmit beam is further selected such that self-interference caused by the transmit signal transmitted via the transmit beam to the SSB or CSI-RS received via the receive beam is less than a threshold.

[0103] In some implementations, the resource configuration message is received via a first transmit-receive point (TRP) coupled to the network entity, and the FD reference signal is transmitted to a second TRP coupled to the network entity. In some such implementations, the first TRP includes a DL TRP, and the second TRP includes a UL TRP.

[0104] In some implementations, the FD reference signal is transmitted once in response to receiving a resource configuration message. Alternatively, the FD reference signal is transmitted multiple times, and the resource configuration message indicates parameters associated with the timing of the FD reference signal transmissions. In some such implementations, process 500 further includes receiving an activation message from a network entity at the UE and activating the transmission of the FD reference signal in response to receiving the activation message. Additionally or alternatively, process 500 further includes receiving a deactivation message from a network entity at the UE and deactivating the transmission of the FD reference signal in response to receiving the deactivation message.

[0105] In some implementations, process 500 further includes receiving, at the UE, a UL scheduling grant indicating the selected UL transport beam from the network entity, and a DL scheduling grant at the UE indicating the selected DL receive beam from the network entity. In some such implementations, the selected UL transport beam includes a transport beam based on a resource configuration message, the selected DL receive beam includes a receive beam based on a resource configuration message, or a combination thereof. In some such implementations, process 500 further includes transmitting a first signal from the UE to the network entity via the selected UL transport beam and receiving a second signal at the UE via the selected DL receive beam from the network entity. The transmission of the first signal and the reception of the second signal use at least some of the same time and frequency resources.

[0106] Therefore, procedure 500 enables the UE to transmit the FD reference signal to the network entity via the UL transmission beam, which reduces (e.g., minimizes) self-interference between concurrent UL transmission and DL reception. Providing the FD reference signal to the network entity allows the network entity to schedule the UE for both UL and DL using a beam without significant self-interference. Thus, procedure 500 enables the UE to operate in FD mode without (or with less) degrading one of the signals due to self-interference.

[0107] It should be noted that, for reference Figure 5 One or more blocks (or operations) described can be combined with one or more blocks (or operations) of another graph. For example, Figure 5 One or more blocks (or operations) of one graph can be combined with one or more blocks (or operations) of another graph. As another example, Figure 5 One or more blocks can be with Figures 2 to 4A combination of one or more blocks (or operations) of another. Alternatively, the above references... Figures 1 to 7 One or more operations described can be compared with the reference Figure 8 A combination of one or more operations described.

[0108] Figure 6 This is a flowchart illustrating an exemplary process for communication performed by a network entity. For example, according to some aspects of this disclosure, exemplary blocks of the process can enable the network entity to receive an FD reference signal from the UE. Further details will also be provided regarding... Figure 8 The network entity 350 shown is an exemplary block. Figure 8 This is a conceptual block diagram illustrating the design of network entity 350. As an illustrative and non-limiting example, network entity 350 may include base station 105, a network, or a core network. Network entity 350 includes, for example, [details about the design]. Figure 1 and Figure 2 Base station 105 Figure 3 and Figure 4 The network entity 350 or combinations thereof illustrates the structure, hardware, and components. For example, network entity 350 may include a controller / processor 240 that operates to execute logical or computer instructions stored in memory 242, and components 350 that control the network entity 350 to provide the characteristics and functions of the network entity. Network entity 350 transmits and receives signals via radio devices 801a to 801t and antennas 234a to 234t under the control of controller / processor 240. Radio devices 801a to 801t include various components and hardware for network entity 350 (such as base station 105), such as... Figure 2 As shown, it includes modulators / demodulators 232a to 232t, a transmit processor 220, a TX MIMO processor 230, a MIMO detector 236, and a receive processor 238.

[0109] As shown in the figure, memory 242 may include signal TX logic 802, signal RX logic 803, and beamformer 804. In some aspects, signal TX logic 802, signal RX logic 803, beamformer 804, or combinations thereof may include or correspond to processor 352. Network entity 350 can be derived from, for example... Figure 7 One or more UEs may receive signals or send signals to one or more UEs.

[0110] refer to Figure 6A flowchart illustrating an exemplary process 600 for communication operations of a network entity is shown. In some embodiments, process 600 may be performed by network entity 350. In some other embodiments, process 600 may be performed by a device configured for wireless communication. For example, the device may include at least one processor and memory coupled to the processor. The processor may be configured to perform the operations of process 600. In some other embodiments, process 600 may be performed or carried out using a non-transitory computer-readable medium on which program code is recorded. The program code may be computer-executable program code for causing a computer to perform the operations of process 600.

[0111] As shown in block 602, the network entity sends a resource configuration message to the UE. The resource configuration message includes a first parameter corresponding to the full-duplex (FD) uplink (UL) and a second parameter corresponding to the FD downlink (DL). As an example of block 602, network entity 350 can use radio devices 801a to 801t and antennas 234a to 234t to send the resource configuration message. To further illustrate, network entity 350 can execute signal TX logic 802 stored in memory 242 under the control of controller / processor 240. The execution environment of signal TX logic 802 provides the function of sending a resource configuration message to the UE. The resource configuration message includes a first parameter corresponding to the FD UL and a second parameter corresponding to the FD DL.

[0112] At block 604, the network entity receives an FD reference signal from the UE based on a resource configuration message. As an example of block 604, network entity 350 may use radio devices 801a to 801t and antennas 234a to 234t to receive the FD reference signal. To further illustrate, network entity 350 may execute signal RX logic 803 stored in memory 242 under the control of controller / processor 240. The execution environment of signal RX logic 803 provides the functionality to receive the FD reference signal from the UE based on the resource configuration message. In some implementations, network entity 350 determines the UL transmit beam, DL receive beam, or both for scheduling the UE based on the FD reference signal. For example, network entity 350 may execute a beam determiner 804 stored in memory 242 under the control of controller / processor 240. The execution environment of beam determiner 804 provides the functionality to determine the UL transmit beam, DL receive beam, or both for scheduling the UE based on the FD reference signal.

[0113] In some embodiments, process 600 may include a resource configuration message including a sounding reference signal (SRS) resource configuration message and an FD reference signal including an SRS. Alternatively or additionally, the first parameter includes a spatial relation parameter, the second parameter includes a transport configuration information (TCI) parameter, or a combination thereof. In some such embodiments, the spatial relation parameter includes an identifier for a synchronization signal block (SSB) resource, an identifier for a channel state information reference signal (CSI-RS) resource, or an identifier for a sounding reference signal (SRS) resource. In some such embodiments, the TCI parameter includes an identifier for a second SSB resource or an identifier for a second CSI-RS resource.

[0114] In some implementations, the resource configuration message also includes a self-interference strength threshold. In some such implementations, the self-interference strength threshold includes an absolute power value. Alternatively, the self-interference strength threshold includes a relative power value. Additionally or alternatively, the resource configuration message is included in a Radio Resource Control (RRC) signaling message, a Media Access Control Element (MACCE), a Downlink Control Information (DCI), or a combination thereof.

[0115] In some embodiments, process 600 further includes selecting a UL transmit beam for the UE for FD UL transmission at the network entity and based on an FD reference signal, and selecting a DL receive beam for the network entity for FD DL transmission at the network entity and based on a second parameter. In some such embodiments, process 600 further includes determining UL receive performance at the network entity based on a specific UL beam through which the FD reference signal is received, comparing the UL receive performance to a threshold, and selecting a specific UL beam as the UL transmit beam based on the UL receive performance that meets the threshold. In some such embodiments, process 600 further includes sending a UL scheduling grant from the network entity to the UE indicating the selected UL transmit beam, and sending a DL scheduling grant from the network entity to the UE indicating the selected DL receive beam. In some such embodiments, process 600 further includes receiving a first signal from the UE via the selected UL transmit beam at a first transmit-receive point (TRP) coupled to the network entity, and transmitting a second signal to the UE from a second TRP coupled to the network entity via the selected DL receive beam. The reception of the first signal and the transmission of the second signal use at least some of the same time and frequency resources. In some such implementations, the first TRP includes a UL TRP, and the second TRP includes a DL TRP.

[0116] In some embodiments, process 600 further includes determining that the UL reception performance fails to meet a threshold based on a specific UL beam through which the FD reference signal is received, and scheduling a DL receive beam for the UE based on a second parameter. In some such embodiments, process 600 further includes avoiding scheduling a UL transmission beam for the UE in response to determining that the UL reception performance fails to meet the threshold. Alternatively, process 600 further includes determining that the UL reception performance of a specific UL beam through which the FD reference signal is received fails to meet the threshold, and scheduling a UL transmission beam for the UE based on a UL beam that is not an FD reference signal. In some such embodiments, process 600 further includes avoiding scheduling a DL receive beam for the UE.

[0117] Therefore, process 600 enables the network entity to receive the FD reference signal from the UE via a UL transmission beam that reduces (e.g., minimizes) self-interference between concurrent UL transmission and DL reception at the UE. Based on the FD reference signal, the network entity schedules the UE for UL and DL using a beam with no significant self-interference. Thus, process 600 enables the network entity to assist the UE in operating in FD mode with little or no degradation of one of the signals due to self-interference.

[0118] It should be noted that, for reference Figure 6 One or more blocks (or operations) described can be combined with one or more blocks (or operations) of another graph. For example, Figure 6 One or more blocks can be with Figures 2 to 4 A combination of one or more blocks (or operations) of another. Alternatively, the above references... Figures 1 to 4 and Figure 8 One or more operations described can be compared with the reference Figure 7 A combination of one or more operations described.

[0119] In some aspects, techniques for implementing a reference signal scheme at a user equipment (UE) while reducing self-interference can include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes or apparatuses described elsewhere herein. Some aspects can include an apparatus, such as a user equipment (UE), configured to receive a resource configuration message from a network entity. The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The apparatus is also configured to transmit an FD reference signal to the network entity based on the resource configuration message. In some embodiments, the apparatus includes a radio means, such as that provided by the user equipment (UE). In some embodiments, the apparatus can include at least one processor and memory coupled to the processor. The processor can be configured to perform the operations described herein with respect to a radio means. In some other embodiments, the apparatus can include a non-transitory computer-readable medium on which program code is recorded, and the program code can be executed by a computer to cause the computer to perform the operations described herein with reference to a radio means. In some embodiments, the apparatus can include one or more means configured to perform the operations described herein.

[0120] In the first aspect, the resource configuration message includes a probe reference signal (SRS) resource configuration message, and the FD reference signal includes the SRS.

[0121] In the second aspect, either alone or in combination with the first aspect, the first parameter includes spatial relational parameters, the second parameter includes transmission configuration information (TCI) parameters, or a combination thereof.

[0122] In the third aspect, either alone or in combination with the second aspect, the spatial relationship parameters include the identifier of the first synchronization signal block (SSB) resource, the identifier of the first channel state information reference signal (CSI-RS) resource, or the identifier of the sounding reference signal (SRS) resource.

[0123] In the fourth aspect, either alone or in combination with the third aspect, the TCI parameter includes the identifier of the second SSB resource or the identifier of the second CSI-RS resource.

[0124] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the resource configuration message also indicates a self-interference strength threshold.

[0125] In the sixth aspect, alone or in combination with the fifth aspect, the self-interference intensity threshold includes an absolute power value or a relative power value.

[0126] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the resource configuration message is included in a radio resource control (RRC) signaling message, a media access control element (MAC CE), a downlink control information (DCI), or a combination thereof.

[0127] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, the device determines the transmission beam based on a resource configuration message. The FD reference signal is transmitted via the transmission beam.

[0128] In the ninth aspect, alone or in combination with the eighth aspect, determining the transmission beam includes selecting a transmission beam from a plurality of pre-configured transmission beams.

[0129] In the tenth aspect, alone or in combination with one or more of the eighth to ninth aspects, the first parameter indicates a first synchronization signal block (SSB) resource or a first channel state information reference signal (CSI-RS) resource, and the second parameter indicates a second SSB resource or a second CSI resource.

[0130] In the eleventh aspect, alone or in conjunction with the tenth aspect, the device determines a second receiving beam to receive a second SSB transmitted by a network entity in a second SSB resource or a second CSI-RS transmitted by a network entity in a second CSI-RS resource.

[0131] In the twelfth aspect, alone or in conjunction with the eleventh aspect, the device receives, via a first receiving beam, a first SSB transmitted by a network entity in a first SSB resource or a first CSI-RS transmitted by a network entity in a first CSI-RS resource. The first receiving beam has the same beam weight, the same beam direction, or both as the transmitting beam.

[0132] In the thirteenth aspect, alone or in conjunction with the twelfth aspect, the transmission beam is selected such that the signal-to-interference-plus-noise ratio (SINR) generated by the first SSB or the first CSI-RS received via the first receiving beam is maximized.

[0133] In the fourteenth aspect, alone or in conjunction with the thirteenth aspect, the transmission beam is further selected such that the self-interference caused by the transmission signal transmitted via the transmission beam to the second SSB or the second CSI-RS received via the second receiving beam is less than a threshold.

[0134] In the fifteenth aspect, alone or in combination with one or more of the eighth to ninth aspects, the first parameter indicates a probe reference signal (SRS) resource, and the second parameter indicates a synchronization signal block (SSB) resource or a channel state information reference signal (CSI-RS) resource.

[0135] In the sixteenth aspect, alone or in conjunction with the fifteenth aspect, the device determines a receiving beam to receive an SSB transmitted by a network entity in an SSB resource or a CSI-RS transmitted by a network entity in a CSI-RS resource.

[0136] In the seventeenth aspect, alone or in conjunction with the sixteenth aspect, the transmission beam is selected such that the correlation coefficient between the transmission beam of the UE and the transmission beam used by the UE to transmit SRS in the SRS resources is minimized.

[0137] In the eighteenth aspect, alone or in conjunction with the seventeenth aspect, the transmission beam is further selected such that the self-interference to the SSB or CSI-RS received via the receiving beam caused by the transmission signal transmitted via the transmission beam is less than a threshold.

[0138] In the nineteenth aspect, alone or in combination with one or more of aspects eight through eighteen, the resource configuration message is received via a first transmit-receive point (TRP) coupled to the network entity, and the FD reference signal is sent to a second TRP coupled to the network entity.

[0139] In the twentieth aspect, alone or in conjunction with the nineteenth aspect, the first TRP includes the DL TRP, and the second TRP includes the ULTRP.

[0140] In aspect twenty-one, either alone or in combination with one or more of aspects one through twenty, the FD reference signal is sent once in response to receiving a resource configuration message.

[0141] In the twenty-second aspect, either alone or in combination with one or more of the first to twentieth aspects, the FD reference signal is transmitted multiple times, and the resource configuration message indicates the timing-related parameters between the transmission of the FD reference signal.

[0142] In the twenty-third aspect, alone or in conjunction with the twenty-second aspect, the device receives an activation message from a network entity and activates the transmission of the FD reference signal in response to receiving the activation message.

[0143] In the twenty-fourth aspect, alone or in combination with one or more of the twenty-second and twenty-third aspects, the device receives a deactivation message from a network entity and deactivates the transmission of the FD reference signal in response to receiving the deactivation message.

[0144] In the twenty-fifth aspect, alone or in combination with one or more of the first to twenty-fourth aspects, the device receives from the network entity a UL scheduling authorization indicating the selected UL transmission beam and a DL scheduling authorization indicating the selected DL reception beam.

[0145] In aspect twenty-six, alone or in conjunction with aspect twenty-five, the selected UL transmission beam includes a transmission beam based on a resource configuration message, the selected DL reception beam includes a reception beam based on a resource configuration message, or a combination thereof.

[0146] In the twenty-seventh aspect, alone or in combination with one or more of the twenty-fifth to twenty-sixth aspects, the device transmits a first signal to the network entity via a selected UL transmission beam.

[0147] In the twenty-eighth aspect, individually or in combination with one or more of the first to twenty-seventh aspects, the device receives a second signal from a network entity via a selected DL receiving beam. The transmission of the first signal and the reception of the second signal use at least some of the same time and frequency resources.

[0148] In some aspects, a device configured for wireless communication, such as a network entity, is configured to send a resource configuration message to a user equipment (UE). The resource configuration message includes a first parameter corresponding to a full-duplex (FD) uplink (UL) and a second parameter corresponding to an FD downlink (DL). The device is also configured to receive an FD reference signal from the UE based on the resource configuration message. In some embodiments, the device includes a wireless means, such as a network entity. In some embodiments, the device may include at least one processor and memory coupled to the processor. The processor may be configured to perform the operations described herein with respect to a wireless means. In some other embodiments, the device may include a non-transitory computer-readable medium on which program code is recorded, and the program code may be executed by a computer to cause the computer to perform the operations described herein with reference to a wireless means. In some embodiments, the device may include one or more means configured to perform the operations described herein.

[0149] In the twenty-ninth aspect, the resource configuration message includes a probe reference signal (SRS) resource configuration message, and the FD reference signal includes the SRS.

[0150] In the thirtieth aspect, alone or in combination with the twenty-ninth aspect, the first parameter includes a spatial relation parameter, the second parameter includes a transport configuration information (TCI) parameter, or a combination thereof.

[0151] In the thirty-first aspect, alone or in conjunction with the thirtieth aspect, the spatial relational parameters include identifiers of synchronization signal block (SSB) resources, identifiers of channel state information reference signal (CSI-RS) resources, or identifiers of sounding reference signal (SRS) resources.

[0152] In aspect thirty-two, alone or in conjunction with aspect thirty-one, the TCI parameter includes an identifier of the second SSB resource or an identifier of the second CSI-RS resource.

[0153] In aspect thirty-three, alone or in combination with one or more of aspects twenty-nine to thirty-two, the resource allocation message also includes a self-interference strength threshold.

[0154] In aspect thirty-four, alone or in combination with aspect thirty-three, the self-interference intensity threshold includes the absolute power value.

[0155] In aspect thirty-five, alone or in combination with aspect thirty-three, the self-interference intensity threshold includes the relative power value.

[0156] In aspect thirty-six, alone or in combination with one or more of aspects twenty-nine to thirty-five, resource configuration messages are included in radio resource control (RRC) signaling messages, media access control control elements (MAC CE), downlink control information (DCI), or combinations thereof.

[0157] In the thirty-seventh aspect, alone or in combination with one or more of aspects twenty-nine to thirty-six, the device selects the UL transmission beam of the UE for FD UL transmission based on the FD reference signal and selects the DL reception beam of the network entity for FD DL transmission based on the second parameter.

[0158] In the thirty-eighth aspect, alone or in conjunction with the thirty-seventh aspect, the device determines UL reception performance based on a specific UL beam through which it receives the FD reference signal, compares the UL reception performance with a threshold, and selects a specific UL beam as the UL transmission beam based on the UL reception performance that meets the threshold.

[0159] In the thirty-ninth aspect, alone or in conjunction with the thirty-eighth aspect, the device sends to the UE a UL scheduling authorization indicating the selected UL transmission beam and a DL scheduling authorization indicating the selected DL reception beam.

[0160] In the fortieth aspect, alone or in conjunction with the thirty-ninth aspect, the device receives a first signal from the UE via a selected UL transmission beam at a first transmit-receive point (TRP) and transmits a second signal to the UE from a second TRP via a selected DL receive beam. The reception of the first signal and the transmission of the second signal use at least some of the same time and frequency resources.

[0161] In the forty-first aspect, alone or in combination with the forty-first aspect, the first TRP includes the UL TRP, and the second TRP includes the DL TRP.

[0162] In aspect 42, alone or in combination with one or more of aspects 29 to 36, the device determines that the UL reception performance fails to meet a threshold based on a specific UL beam through which the FD reference signal is received and schedules a DL reception beam for the UE based on a second parameter.

[0163] In aspect 43, alone or in combination with aspect 42, the device, in response to determining that the UL reception performance fails to meet a threshold, avoids scheduling a UL transmission beam for the UE.

[0164] In aspect 44, alone or in combination with one or more of aspects 29 to 36, the device determines that the UL reception performance of a specific UL beam through which an FD reference signal is received fails to meet a threshold, and schedules a UL transmission beam for the UE based on a UL beam that is not an FD reference signal.

[0165] In aspect forty-five, alone or in combination with aspect forty-four, the device avoids scheduling DL receive beams for the UE.

[0166] Those skilled in the art will understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the foregoing description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0167] This article is about Figures 1 to 8 The components, functional blocks, and modules described include processors, electronic devices, hardware devices, electronic components, logic circuits, memory, software code, firmware code, and any combination thereof. Furthermore, the features discussed herein can be implemented via dedicated processor circuitry, via executable instructions, or a combination thereof.

[0168] The components, functional blocks, and modules described in this article (such as...) Figures 1 to 4 , Figure 7 and Figure 8 The components (such as processors, electronic devices, hardware devices, electronic components, logic circuits, memory, software code, firmware code, etc., or any combination thereof) discussed herein may include processors, electronic devices, hardware devices, electronic components, logic circuits, memory, software code, firmware code, etc., or any combination thereof. Furthermore, the components, functional blocks, and modules (such as...) discussed herein are not related to the components, functional blocks, and modules described herein. Figures 1 to 4 , Figure 7 and Figure 8 The features related to the components can be implemented via dedicated processor circuitry, via executable instructions, or a combination thereof.

[0169] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with this disclosure can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and design constraints for the implementation of the entire system. For each specific application, those skilled in the art may implement the described functionality in different ways, but such implementation decisions should not be construed as departing from the scope of this disclosure. Those skilled in the art will also readily recognize that the order or combination of components, methods, or interactions described herein are merely examples, and that components, methods, or interactions of various aspects of this disclosure can be combined or performed in ways other than those described and illustrated herein.

[0170] The various illustrative logics, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been generally described in terms of functionality and illustrated in the various illustrative components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented as hardware or software depends on the specific application and design constraints implemented for the entire system.

[0171] Hardware and data processing apparatuses for implementing the various illustrative logics, logic blocks, modules, and circuits described in conjunction with the aspects disclosed herein may be implemented or executed using general-purpose single-chip or multi-chip processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or any conventional processor, controller, microprocessor, or state machine. In some embodiments, the processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration. In some embodiments, specific processes and methods may be performed by circuits with specific functions.

[0172] In one or more aspects, the described functionality can be implemented in hardware, digital electronic circuits, computer software, firmware, including the structures and their structural equivalents disclosed in this specification, or in any combination thereof. Embodiments of the subject matter described in this specification can also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a computer storage medium for execution by a data processing device or for controlling the operation of a data processing device.

[0173] If implemented in software, functionality can be stored or transmitted on or thereon as one or more instructions or code on a computer-readable medium. The processes of the methods or algorithms disclosed herein can be implemented in processor-executable software modules that can reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any medium capable of facilitating the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, any connection is properly referred to as a computer-readable medium. As used herein, disks and optical discs include compact optical discs (CDs), laser discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs, where disks typically magnetically copy data, while optical discs optically copy data using lasers. The combinations described above should also be included within the scope of computer-readable media. Furthermore, the operation of a method or algorithm may reside as one or any combination of codes and instructions on a machine-readable and computer-readable medium, and may be incorporated into a computer program product.

[0174] Those skilled in the art will readily recognize various modifications to the embodiments described in this disclosure, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, the claims are not intended to be limited to the embodiments shown herein, but are given the broadest scope consistent with this disclosure, the principles disclosed herein, and the novel features.

[0175] Furthermore, those skilled in the art will readily understand that the terms “upper” and “lower” are sometimes used to facilitate the description of a drawing and to indicate a relative position corresponding to the orientation of the drawing on a correctly oriented page, and may not reflect the proper orientation of any implemented device.

[0176] In the context of individual implementations, certain features described herein may also be implemented in combination in a single implementation. Conversely, different features described in the context of a single implementation may also be implemented separately or in any suitable sub-combination in multiple implementations. Furthermore, although features may be described as functioning in certain combinations and even initially stated so, in some cases one or more features from the claimed combination may be removed from the combination, and the claimed combination may involve sub-combinations or variations thereof.

[0177] Similarly, although operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the specific order shown or sequentially, or to perform all shown operations to achieve the desired result. Furthermore, the drawings may schematically depict another exemplary process in the form of a flowchart. However, other operations not depicted may be incorporated into the schematically illustrated exemplary process. For example, one or more additional operations may be performed before, after, simultaneously with, or between any described operations. In some cases, multitasking and parallel processing may be advantageous. Moreover, the individuality of the various system components in the implementations described above should not be construed as requiring such individuality in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Furthermore, other embodiments are within the scope of the following claims. In some cases, the actions stated in the claims may be performed in a different order and still achieve the desired result.

[0178] As used herein (including in the claims), the term “or” when used in a list of two or more terms means that any one of the listed terms may be used alone, or any combination of two or more of the listed terms may be used. For example, if a composition is described as containing component A, B, or C, the composition may contain A alone; conversely, the composition may contain only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Moreover, as used herein (including in the claims), “or” used in a list of terms modified by “at least one” indicates a disjunctive list, such that, for example, a list of “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) or any combination thereof.

[0179] The prior description of this disclosure has been provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will readily be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication by a user equipment (UE), the method comprising: Receive a resource configuration message from a network entity, the resource configuration message including a sounding reference signal (SRS) resource configuration message, the SRS resource configuration message including a first parameter corresponding to the full-duplex FD uplink UL and a second parameter corresponding to the FD downlink DL; as well as Based on the resource configuration message, the UE sends an FD reference signal to the network entity, wherein the FD reference signal includes an SRS.

2. The method of claim 1, wherein the first parameter includes a spatial relationship parameter, and the second parameter includes a transmission configuration information (TCI) parameter.

3. The method of claim 2, wherein: The spatial relationship parameters include the identifier of the first synchronization signal block (SSB) resource, the identifier of the first channel state information reference signal (CSI-RS) resource, or the identifier of the sounding reference signal (SRS) resource. as well as The TCI parameters include the identifier of the second SSB resource or the identifier of the second CSI-RS resource.

4. The method of claim 1, wherein: The resource configuration message also indicates a self-interference strength threshold; and The self-interference intensity threshold includes an absolute power value or a relative power value.

5. The method of claim 1, further comprising: The transmission beam is determined based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as Determining the transmission beam includes selecting the transmission beam from a plurality of pre-configured transmission beams.

6. The method of claim 1, further comprising: The transmission beam is determined based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as The first parameter indicates a first synchronization signal block (SSB) resource or a first channel state information reference signal (CSI-RS) resource, and the second parameter indicates a second SSB resource or a second CSI-RS resource.

7. The method of claim 6, further comprising: Determine a second receiving beam to receive a second SSB transmitted by the network entity in the second SSB resource or a second CSI-RS transmitted by the network entity in the second CSI-RS resource; as well as The first receiving beam receives a first SSB transmitted by the network entity in the first SSB resource or a first CSI-RS transmitted by the network entity in the first CSI-RS resource via a first receiving beam, wherein the first receiving beam has the same beam weight, the same beam direction, or both as the transmitting beam.

8. The method of claim 7, wherein: The transmission beam is selected such that the signal-to-interference-plus-noise ratio (SINR) generated by the first SSB or the first CSI-RS received via the first receiving beam is maximized. as well as The transmission beam is further selected such that the self-interference caused by the transmission signal transmitted via the transmission beam to the second SSB or the second CSI-RS received via the second receiving beam is less than a threshold.

9. The method of claim 1, further comprising: The transmission beam is determined based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as The first parameter indicates a probe reference signal (SRS) resource, and the second parameter indicates a synchronization signal block (SSB) resource or a channel state information reference signal (CSI-RS) resource.

10. The method of claim 9, further comprising: Determine the receiving beam to receive an SSB transmitted by the network entity in the SSB resource or a CSI-RS transmitted by the network entity in the CSI-RS resource; The transmission beam is selected such that the correlation coefficient between the transmission beam of the UE and the transmission beam used by the UE to transmit SRS in the SRS resource is minimized. as well as The transmission beam is further selected such that the self-interference caused by the transmission signal transmitted via the transmission beam to the SSB or the CSI-RS received via the receiving beam is less than a threshold.

11. The method of claim 1, further comprising: The transmission beam is determined based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as The resource configuration message is received via a first transmit-receive point (TRP) coupled to the network entity, and the FD reference signal is sent to a second TRP coupled to the network entity.

12. A device configured for wireless communication, comprising: At least one processor; and Memory, the memory being coupled to the at least one processor, The at least one processor is configured to: At the user equipment (UE), a resource configuration message is received from a network entity. The resource configuration message includes a sounding reference signal (SRS) resource configuration message, which includes a first parameter corresponding to the full-duplex FD uplink UL and a second parameter corresponding to the FD downlink DL. as well as Based on the resource configuration message, the FD reference signal is transmitted from the UE to the network entity, wherein the FD reference signal includes SRS.

13. The device of claim 12, wherein the first parameter includes a spatial relationship parameter, and the second parameter includes a transmission configuration information (TCI) parameter.

14. The device as claimed in claim 13, wherein: The spatial relationship parameters include the identifier of the first synchronization signal block (SSB) resource, the identifier of the first channel state information reference signal (CSI-RS) resource, or the identifier of the sounding reference signal (SRS) resource; and The TCI parameters include the identifier of the second SSB resource or the identifier of the second CSI-RS resource.

15. The apparatus of claim 12, wherein: The resource configuration message also indicates a self-interference strength threshold; and The self-interference intensity threshold includes an absolute power value or a relative power value.

16. The apparatus of claim 12, wherein: The at least one processor is further configured to determine a transmission beam at the UE based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as Determining the transmission beam includes selecting the transmission beam from a plurality of pre-configured transmission beams.

17. The device of claim 12, wherein: The at least one processor is further configured to determine a transmission beam at the UE based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as The first parameter indicates a first synchronization signal block (SSB) resource or a first channel state information reference signal (CSI-RS) resource, and the second parameter indicates a second SSB resource or a second CSI-RS resource.

18. The device of claim 17, wherein the at least one processor is further configured to: At the UE, a second receive beam is determined to receive a second SSB transmitted by the network entity in the second SSB resource or a second CSI-RS transmitted by the network entity in the second CSI-RS resource; and The first receiving beam receives a first SSB transmitted by the network entity in the first SSB resource or a first CSI-RS transmitted by the network entity in the first CSI-RS resource via a first receiving beam, wherein the first receiving beam has the same beam weight, the same beam direction, or both as the transmitting beam.

19. The apparatus of claim 18, wherein: The transmission beam is selected such that the signal-to-interference-plus-noise ratio (SINR) generated by the first SSB or the first CSI-RS received via the first receiving beam is maximized. as well as The transmission beam is further selected such that the self-interference caused by the transmission signal transmitted via the transmission beam to the second SSB or the second CSI-RS received via the second receiving beam is less than a threshold.

20. The apparatus of claim 12, wherein: The at least one processor is further configured to determine a transmission beam at the UE based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; and The first parameter indicates a probe reference signal (SRS) resource, and the second parameter indicates a synchronization signal block (SSB) resource or a channel state information reference signal (CSI-RS) resource.

21. The apparatus of claim 20, wherein: The at least one processor is further configured to determine a receive beam at the UE to receive an SSB transmitted by the network entity in an SSB resource or a CSI-RS transmitted by the network entity in a CSI-RS resource; The transmission beam is selected such that the correlation coefficient between the transmission beam of the UE and the transmission beam used by the UE to transmit SRS in the SRS resource is minimized. as well as The transmission beam is further selected such that the self-interference caused by the transmission signal transmitted via the transmission beam to the SSB or the CSI-RS received via the receiving beam is less than a threshold.

22. The device of claim 12, wherein: The at least one processor is further configured to determine a transmission beam at the UE based on the resource configuration message, wherein the FD reference signal is transmitted via the transmission beam; as well as The resource configuration message is received via a first transmit-receive point (TRP) coupled to the network entity, and the FD reference signal is sent to a second TRP coupled to the network entity.

23. A wireless communication method, the method comprising: A resource configuration message is sent from a network entity to a user equipment (UE). The resource configuration message includes a sounding reference signal (SRS) resource configuration message, which includes a first parameter corresponding to the full-duplex FD uplink (UL) and a second parameter corresponding to the FD downlink (DL). as well as Based on the resource configuration message, the network entity receives an FD reference signal from the UE, wherein the FD reference signal includes an SRS.

24. The method of claim 23, wherein the first parameter includes a spatial relationship parameter, and the second parameter includes a transmission configuration information (TCI) parameter.

25. The method of claim 24, wherein: The spatial relationship parameters include the identifier of the Synchronization Signal Block (SSB) resource, the identifier of the Channel State Information Reference Signal (CSI-RS) resource, or the identifier of the Probe Reference Signal (SRS) resource. as well as The TCI parameters include the identifier of the second SSB resource or the identifier of the second CSI-RS resource.

26. The method of claim 23, wherein the resource configuration message further includes a self-interference strength threshold.

27. The method of claim 26, wherein the self-interference intensity threshold includes an absolute power value or a relative power value.

28. A device configured for wireless communication, comprising: At least one processor; and Memory, the memory being coupled to the at least one processor, The at least one processor is configured to: Initiate the transmission of a resource configuration message from a network entity to a user equipment (UE), the resource configuration message including a sounding reference signal (SRS) resource configuration message, the SRS resource configuration message including a first parameter corresponding to the full-duplex FD uplink UL and a second parameter corresponding to the FD downlink DL; as well as Based on the resource configuration message, the network entity receives an FD reference signal from the UE, wherein the FD reference signal includes an SRS.

29. The device of claim 28, wherein the first parameter includes a spatial relationship parameter, and the second parameter includes a transmission configuration information (TCI) parameter.

30. The device of claim 29, wherein: The spatial relationship parameters include the identifier of the Synchronization Signal Block (SSB) resource, the identifier of the Channel State Information Reference Signal (CSI-RS) resource, or the identifier of the Probe Reference Signal (SRS) resource. as well as The TCI parameters include the identifier of the second SSB resource or the identifier of the second CSI-RS resource.

31. The device as claimed in claim 28, wherein: The resource configuration message also includes a self-interference strength threshold; and The self-interference intensity threshold includes an absolute power value or a relative power value.

32. A computer-readable storage medium having instructions stored thereon, which, when executed, cause one or more processors to perform the method according to any one of claims 1-11 and 23-27.

33. A computer program product comprising computer-readable instructions, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-11 and 23-27.

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