Classifying links established between user equipment and network node via reconfigurable smart surface

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may send an indication of a classification of a link established between the UE and a network node. The classification may indicate whether the link is associated with reciprocity. The reciprocity may include beam correspondence and channel reciprocity. The classification of the link may be a binary classification. The classification of the link may be based at least in part on a metric associated with the link. Depending on one or more link characteristics associated with the link, the link may be associated with the reciprocity. Numerous other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 822,247, filed on August 25, 2022, entitled "CLASSIFYING LINKSESTABLISHED BETWEEN A USER EQUIPMENT AND A NETWORK NODE VIA A RECONFIGURABLEINTELLIGENT SURFACE," which is hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for classifying a link established between a user equipment (UE) and a network node via a reconfigurable smart surface (RIS). Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more network nodes that support communications for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. A "downlink" (or "DL") refers to a communication link from a network node to a UE, and an "uplink" (or "UL") refers to a communication link from a UE to a network node. Some wireless networks may support device-to-device communications, such as via a local link (e.g., a side link (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, etc.).

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region, and / or global level. 5G (which may be referred to as New Radio (NR)) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. 5G is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink, using CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to increase, further improvements in 4G, 5G, and other radio access technologies remain useful. Summary of the invention

[0007] A reconfigurable smart surface (RIS) can receive a signal from a user equipment (UE) and reflect the signal to a network node. The RIS can receive the signal and reflect the signal in a first direction. Alternatively, the RIS can receive a signal from a network node and reflect the signal to the UE. The RIS can receive the signal and reflect the signal in a second direction. In some cases, a channel associated with the first direction may not correspond to a channel associated with the second direction. In other words, the channel may be non-reciprocal. The non-reciprocity of the RIS may affect beam correspondence and reciprocity-based channel detection. In addition, the UE can perform various tasks based at least in part on the assumption of reciprocity, and when the channels in different directions are actually non-reciprocal, the performance of the UE may be negatively affected.

[0008] In various aspects of the techniques and apparatus described herein, a UE may determine a classification of a link established between the UE and a network node via a RIS. The UE may determine the classification of the link based at least in part on a two-way sounding procedure. The classification may indicate whether the link is associated with reciprocity. Reciprocity may include beam correspondence and channel reciprocity via the RIS. The UE may send an indication of the classification of the link to the network node or to another UE. The UE may perform an action based at least in part on the classification of the link. For example, depending on whether the link is associated with reciprocity, the UE may use a reference signal associated with the link.

[0009] In some specific implementations, an apparatus for wireless communication at a UE includes a memory and one or more processors coupled to the memory, the one or more processors configured to: send an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and perform an action based at least in part on the classification of the link.

[0010] In some specific implementations, an apparatus for wireless communication at a network node includes a memory and one or more processors coupled to the memory, the one or more processors configured to send an indication of a classification of a link established between the network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

[0011] In some specific implementations, a method of wireless communication performed by an apparatus of a UE includes: sending an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and performing an action based at least in part on the classification of the link.

[0012] In some specific implementations, a method of wireless communication performed by an apparatus of a network node includes sending an indication of a classification of a link established between the network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

[0013] In some specific implementations, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: send an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and perform an action based at least in part on the classification of the link.

[0014] In some specific implementations, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a network node, cause the network node to: send an indication of a classification of a link established between the network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

[0015] In some specific embodiments, an apparatus for wireless communication includes: a component for sending an indication of a classification of a link established between the apparatus and a network node, wherein the classification indicates whether the link is associated with reciprocity and wherein the reciprocity includes beam correspondence and channel reciprocity; and a component for performing an action based at least in part on the classification of the link.

[0016] In some specific implementations, an apparatus for wireless communication includes a component for sending an indication of a classification of a link established between the apparatus and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

[0017] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, network entities, network nodes and / or processing systems as fully described with reference to the accompanying drawings and the specification and as illustrated by the accompanying drawings and the specification.

[0018] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and methods of operation) and the associated advantages will be better understood according to the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a diagram illustrating an example of a wireless network.

[0020] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network.

[0021] Figure 3 is a diagram illustrating an example decomposed base station architecture.

[0022] Figure 4 is a diagram illustrating an example of a reconfigurable smart surface (RIS).

[0023] Figure 5 is a diagram illustrating an example of signals directed to and from the RIS.

[0024] Figure 6is a diagram illustrating an example associated with classifying a link established between a UE and a network node via a RIS.

[0025] Figures 7 and 8 is a flow chart of an example method of wireless communication.

[0026] Fig. 9 is an illustration of an example apparatus for wireless communications.

[0027] Fig.10 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

[0028] Fig.11 is an illustration of an example apparatus for wireless communications.

[0029] Fig.12 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system. DETAILED DESCRIPTION

[0030] The specific embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to represent configurations in which the concepts described herein may be practiced. For the purpose of providing a thorough understanding of the various concepts, the specific embodiments include specific details. However, it is apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, in order to avoid obscuring such concepts, well-known structures and components are shown in block diagram form.

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

[0032] By way of example, a "processing system" that can include one or more processors implements an element, or any part of an element, or any combination of elements. Examples of processors include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic components, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system can execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is referred to by software, firmware, middleware, microcode, hardware description language, or other names.

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

[0034] Although various aspects may be described herein using terms generally associated with 5G or new radio (NR) radio access technology (RAT), various aspects of the present disclosure may be applicable to other RATs, such as 3G RAT, 4G RAT and / or RATs beyond 5G (e.g., 6G).

[0035] Figure 11 is a diagram illustrating an example of a wireless network 100. The wireless network 100 may be a 5G (e.g., NR) network or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network or elements of a 4G (e.g., Long Term Evolution (LTE)) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), or other entities. The network node 110 is an example of a network node that communicates with the UE 120. As shown, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). For another example, the network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed between two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0036] In some examples, the network node 110 is or includes a network node (such as an RU) that communicates with the UE 120 via a radio access link. In some examples, the network node 110 is or includes a network node (such as a DU) that communicates with other network nodes 110 via a fronthaul link or a midhaul link. In some examples, the network node 110 is or includes a network node (such as a CU) that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link. In some examples, the network node 110 (such as an aggregated network node 110 or a decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. For example, the network node 110 may include an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected to each other or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul, midhaul, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0037] In some examples, the network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to a coverage area of ​​the network node 110 or a network node subsystem serving the coverage area, depending on the context in which the term is used. The network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by a UE 120 associated with the femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or a home network node. Figure 1 In the example shown in , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (e.g., a mobile network node).

[0038] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a "base station" or "network node" may refer to a CU, a DU, a RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with the network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of a plurality of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeatedly perform at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions, but not another base station function. In this way, a single device may include more than one base station.

[0039] The wireless network 100 may include one or more relay stations. A relay station is a network node that receives transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and transmits transmissions of data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown, a network node 110d (e.g., a relay network node) may communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communications between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, or a relay, etc.

[0040] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, or relay network nodes. These different types of network nodes 110 may have different transmit power levels, different coverage areas, or different effects on interference in the wireless network 100. For example, a macro network node may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0041] The network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for the network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless backhaul communication link or a wired backhaul communication link. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0042] UE 120 can be distributed throughout the wireless network 100, and each UE 120 can be stationary or mobile. UE 120 can include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, or a satellite radio), a vehicle-mounted component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node, or any other suitable device configured to communicate via a wireless or wired medium.

[0043] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, or location tags, which may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices, or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. UE 120 may be included inside a housing that houses components of UE 120, such as a processor component or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, or electrically coupled.

[0044] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as a radio technology or air interface. Frequency may also be referred to as a carrier or frequency channel. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0045] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by network node 110.

[0046] Devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, or channels by frequency or wavelength. For example, devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “below 6 GHz” band in various documents and articles. Similar naming issues sometimes occur with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0047] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz–24.25GHz). The bands falling within FR3 can inherit FR1 characteristics or FR2 characteristics, and thus the features of FR1 or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz–71GHz), FR4 (52.6GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands falls within the EHF band.

[0048] With these examples in mind, unless otherwise specifically stated, if the term "sub-6 GHz" is used herein, it may broadly refer to frequencies that may be less than 6 GHz, frequencies that may be within FR1, or frequencies that may include mid-band frequencies. Additionally, unless otherwise specifically stated, if the term "millimeter wave" is used herein, it may broadly refer to frequencies that may include mid-band frequencies, frequencies that may be within FR2, FR4, FR4-a, FR4-1, or FR5, or frequencies that may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, or FR5) may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0049] In some aspects, a UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may send an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and perform an action based at least in part on the classification of the link. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0050] In some aspects, a network node (e.g., network node 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may send to the UE an indication of a classification of a link established between the network node and the UE via a reconfigurable intelligent surface (RIS), wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0051] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0052] Figure 2 2 is a diagram illustrating an example 200 in which a network node 110 communicates with a UE 120 in a wireless network 100. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include a radio frequency component that facilitates direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0053] At the network node 110, the transmit processor 220 may receive data intended for the UE 120 (or a set of UEs 120) from the data source 212. The transmit processor 220 may use one or more channel quality indicators (CQIs) received from the UE 120 to select one or more modulation and coding schemes (MCSs) for the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 using the MCS selected for the UE 120 and may provide data symbols to the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, overhead symbols, or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may also process (e.g., convert to analog, amplify, filter, or up-convert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a to 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0054] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 or other network nodes 110, and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. A receive (RX) processor 258 may process (e.g., demodulate and decode) detected symbols, may provide decoded data for UE 120 to a data sink 260, and may provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other things. In some examples, one or more components of UE 120 may be included in a housing.

[0055] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0056] One or more antennas (e.g., antennas 234a to 234t or antennas 252a to 252r) may include or may be included in one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc. An antenna panel, antenna group, set of antenna elements, or antenna array may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or coupled to one or more transmit or receive components (such as Figure 2 One or more antenna elements of one or more components).

[0057] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the processes described herein.

[0058] At the network node 110, uplink signals from the UE 120 or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component of the modem 232, shown as DEMOD), detected by the MIMO detector 236 where applicable, and further processed by the receive processor 238 to obtain decoded data and control information transmitted via the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the processes described herein.

[0059] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the UE 120 may perform one or more techniques associated with classifying a link established between a UE and a network node via the RIS, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 7 The process of 700 Figure 8 800 and / or operations of other processes as described herein. Memory 242 and memory 282 may store data and program codes for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, and / or interpretation) by one or more processors of network node 110 and / or UE 120, may cause the one or more processors, UE 120, and / or network node 110 to perform or direct, for example, Figure 7 The process of 700 Figure 8 The process 800 and / or operations of other processes described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0060] In some aspects, a UE (e.g., UE 120) includes means for sending an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and / or means for performing an action based at least in part on the classification of the link. In some aspects, means for an apparatus to perform operations described herein may include, for example, one or more of the communications manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0061] In some aspects, a network node (e.g., network node 110) includes means for sending an indication of a classification of a link established between the network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS. In some aspects, means for an apparatus to perform operations described herein may include, for example, one or more of the following: a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0062] Although Figure 2 The blocks in the 2000 and 2010 are illustrated as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0063] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0064] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or components in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station or network equipment can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP or a cell, etc.) or one or more units (or one or more components) that perform base station functionality can be implemented as an aggregated base station (also called an independent base station or a monolithic base station) or a decomposed base station. A "network entity" or a "network node" may refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0065] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) may be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and the like.

[0066] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A decomposed base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design. Individual units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0067] Figure 3 3 is a diagram illustrating an example decomposed base station architecture 300. The decomposed base station architecture 300 may include a CU 310, which may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more decomposed control units (such as a near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a service management and orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via an F1 interface. Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links. Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0068] Each of the units (including CU 310, DU 330, RU 340) and the near-RT RIC 325, non-RT RIC 315, and SMO framework 305 may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to one or more communication interfaces of the corresponding unit may be configured to communicate with one or more of the other units via a transmission medium. In some examples, each of the units may include a wired interface and a wireless interface, the wired interface being configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium, and the wireless interface being configured to receive signals or transmit signals to one or more of the other units via a wireless transmission medium, or both.

[0069] In some aspects, the CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, or service data adaptation protocol (SDAP) functions, etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by the CU 310. The CU 310 may be configured to handle user plane functionality (e.g., central unit-user plane (CU-UP) functionality), control plane functionality (e.g., central unit-control plane (CU-CP) functionality), or a combination thereof. In some specific implementations, the CU 310 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, the CU 310 may be implemented to communicate with the DU 330 for network control and signaling.

[0070] Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 340. In some aspects, the DU 330 may host one or more of a radio link control (RLC) layer, a MAC layer, and one or more high physical (PHY) layers, at least in part, according to a functional partitioning (such as that defined by 3GPP). In some aspects, one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming or physical random access channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0071] Each RU 340 may implement lower layer functionality. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that hosts RF processing functions, or low PHY layer functions (such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc.) based on functional splits (e.g., functional splits defined by 3GPP). In this architecture, each RU 340 may be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, real-time and non-real-time aspects of communicating with the control and user planes of the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture such as a vRAN architecture.

[0072] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of the one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 can also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0073] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and O-eNBs with the near-RT RIC 325.

[0074] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0075] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 The examples described are different.

[0076] Figure 4 is a diagram of an example 400 illustrating RIS. At 402, a first network node (gNB1) may send a first downlink transmission to a first UE (UE1). A second network node (gNB2) may send a second downlink transmission to a second UE (UE2). The first UE and the second UE may be separated by an obstruction. Therefore, the downlink transmission from the first network node may not be received by the second UE, and the downlink transmission from the second network node may not be received by the first UE. At 404, RIS may be employed near an obstruction. The first network node may send a first downlink transmission to the first UE and send a second downlink transmission to the RIS. The RIS may include multiple elements that reflect the second downlink transmission in a direction toward the second UE. Therefore, even if there is an obstruction between the first network node and the second UE, the first network node can effectively perform a downlink transmission to the second UE via the RIS. As indicated above, Figure 4 are provided as examples. Other examples can be found in the Figure 4 The examples described are different.

[0077] Figure 5 is a diagram illustrating an example of signals directed to and from the RIS.

[0078] At 502, a first signal may be directed to a RIS. The first signal may be associated with a first angle (θ1), which may correspond to an angle of incidence. The RIS may direct a second signal, which may be associated with the first signal (e.g., the first signal may be reflected from the RIS as a second signal). The second signal may be associated with a second angle (θ2), which may correspond to an angle of reflection. The first signal and the second signal may be associated with a first direction (or a first reflection path).

[0079] At 504, a third signal may be directed to the RIS. The third signal may be associated with a second angle (θ2), which may correspond to an angle of incidence. The RIS may direct a fourth signal, which may be associated with the third signal (e.g., the third signal may be reflected from the RIS as a fourth signal). The fourth signal may be associated with a third angle (θ3), which may correspond to an angle of reflection. The third and fourth signals may be associated with a second direction (or a second reflection path). Even though both the second and third signals may be associated with the same angle (e.g., the second angle (θ2)), the angles associated with the corresponding signals may not be the same (e.g., the first angle is different from the third angle). Channel reciprocity and beam correspondence may not hold for a reflection path through the RIS. Channel reciprocity may approximately hold for some ranges of angles of incidence, but may be limited.

[0080] As indicated above, Figure 5 are provided as examples. Other examples can be found in the Figure 5 The examples described are different.

[0081] UE capabilities for beam correspondence may be associated with additional signaling. For strong beam correspondence, the beam correspondence (beamCorrespondenceWithoutUL-BeamSweeping) value may be set to 1 without uplink beam scanning. For weak beam correspondence, the beamCorrespondenceWithoutUL-BeamSweeping value may be set to 0. In other words, a UE that meets the beam correspondence requirement without uplink scanning may set the corresponding bit to 1. A UE that meets the beam correspondence requirement with uplink beam scanning may set the bit to 0. UE capabilities for beam correspondence may be based at least in part on channel reciprocity. In addition, channel reciprocity-based detection may be employed. For example, a sounding reference signal (SRS) may be used to detect a downlink channel (e.g., an SRS for antenna switching). A synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) may be used to detect an uplink channel (e.g., a non-codebook-based uplink channel).

[0082] An assumption of channel reciprocity may be maintained between a channel associated with a first direction and a channel associated with a second direction. The assumption of channel reciprocity may be applicable to a RIS, which may be capable of reflecting a received signal. However, depending on the angle of incidence associated with the received signal, non-channel reciprocity may exist such that channel reciprocity and beam correspondence may not hold for a reflection path through the RIS. Due to the non-channel reciprocity of the RIS, a channel associated with a first direction may have different characteristics than a channel associated with a second direction. The non-channel reciprocity of the RIS may affect beam correspondence and reciprocity-based channel detection.

[0083] In various aspects of the techniques and apparatus described herein, a UE may determine a classification of a link established between the UE and a network node via a RIS. The UE may determine the classification of the link based at least in part on a two-way sounding procedure. The classification may indicate whether the link is associated with reciprocity. Reciprocity may include beam correspondence and channel reciprocity via a RIS. The UE may send an indication of the classification of the link to a network node or to another UE. The UE may perform an action based at least in part on the classification of the link. For example, depending on whether the link is associated with reciprocity, the UE may use a reference signal associated with the link. The UE may use a reference signal associated with a link having reciprocity, while the UE may not use a reference signal associated with a link not having reciprocity. In other words, due to the non-channel reciprocity of the RIS, the UE and the network may utilize special treatments for beam correspondence and reciprocity-based channel sounding, thereby improving the performance of the UE and the network.

[0084] In some aspects, beams used for a direct path (e.g., a network node to UE path) and beams used for a reflection path (e.g., a network node to RIS to UE) path can be distinguished and handled separately (e.g., classified separately) because beams associated with the direct path are more likely to be associated with reciprocity, while beams associated with the reflection path are more likely not to be associated with reciprocity.

[0085] Figure 6 6 is a diagram illustrating an example 600 associated with classifying a link established between a UE and a network node via a RIS. Figure 6 As shown, example 600 includes communications between a UE (e.g., UE 120) and a network node (e.g., network node 110). In some aspects, the UE and the network node may be included in a wireless network (such as wireless network 100).

[0086] At 602, the UE may determine a classification of a link established between the UE and a network node via a RIS. The classification may indicate whether the link is associated with reciprocity. Reciprocity may include beam correspondence and channel reciprocity via a RIS. In some aspects, the classification of the link may be a binary classification, wherein a first classification may be associated with a link that is being associated with reciprocity, and a second classification may be associated with a link that is not associated with reciprocity. In some aspects, the classification of the link may be based at least in part on a metric associated with the link. The link may be associated with reciprocity based at least in part on the metric satisfying a threshold. The link may not be associated with reciprocity based at least in part on the metric not satisfying a threshold. The threshold may be based at least in part on a network node implementation, network node capabilities, UE implementation, and / or UE capabilities.

[0087] In some aspects, a link may be associated with reciprocity depending on one or more link characteristics associated with the link. The one or more link characteristics may be associated with a path between the UE and the network node. The path may be a direct path between the UE and the network node and / or a reflected path between the UE and the network via the RIS. Reciprocity may be a function based at least in part on a weight of each path of the link associated with a combination of the direct path and the reflected path. The one or more link characteristics may be associated with an angle of incidence of a signal directed to the RIS and / or an angle of reflection of a signal reflected from the RIS.

[0088] In some aspects, the UE may determine the classification of the link based at least in part on a two-way sounding procedure. The UE may determine the classification of the link based at least in part on a comparison between reported channel state information (CSI) associated with a downlink CSI-RS and measured CSI associated with an uplink SRS. In other words, the UE may compare the reported CSI with the measured CSI, and based at least in part on the comparison result, the UE may determine the classification of the link. Alternatively or additionally, the network node may determine the classification of the link based at least in part on a two-way sounding procedure (e.g., by comparing the reported CSI with the measured CSI). In some aspects, during the initial deployment of the network node and the RIS, the classification of the link may be defined by the operator, where reciprocity may be associated with the SSB beam.

[0089] In some aspects, based at least in part on link classification, the UE and / or network node may classify each link (e.g., beam pairing link) established between the network node and the UE based at least in part on a reciprocity associated with the link. The link may be a communication link. Reciprocity may be associated with beam correspondence and channel reciprocity. Link classification may be a binary classification (e.g., a link with reciprocity versus a link without reciprocity). Alternatively, the UE and / or network node may determine a metric (e.g., a soft metric) for the reciprocity of each link. The UE and / or network node may compare the metric with a threshold. For example, when the metric satisfies a threshold (e.g., the metric is above a threshold), a given link may be classified as reciprocal. When the metric does not satisfy the threshold (e.g., the metric is below a threshold), a given link may be classified as not reciprocal. The threshold may be based at least in part on a network node and / or UE specific implementation or capability.

[0090] In some aspects, the link classification of reciprocity may depend on the link characteristics associated with the link. The link classification of reciprocity may depend on whether the link is associated with a direct path (e.g., a network node to UE path) or a reflection path (e.g., a base station to RIS to UE path). When the link is a mixture of direct and reflection paths, the reciprocity associated with the link may be a function of the weights of each direct and reflection path. In some aspects, the link classification of reciprocity may depend on the angle of incidence and the angle of reflection to and from the RIS, respectively. Better reciprocity may be expected for paths with smaller angles of incidence / reflection (e.g., angles of incidence / reflection less than a threshold).

[0091] In some aspects, the UE and / or the network node may classify (or identify) the reciprocity associated with the link established between the network node and the UE. The UE and / or the network node may estimate the degree of reciprocity of each link via a two-way sounding procedure. For example, the network node may compare the CSI reported from the UE (e.g., CSI measured at least in part based on a downlink CSI-RS) with the CSI measured by the network node (e.g., CSI measured at least in part based on an uplink SRS). Alternatively, during the initial deployment of the network node and RIS, the operator may classify (or identify or characterize) the reciprocity of each beam (e.g., an SSB beam). In addition, the reciprocity information of each link may be shared between the UE and the network node via downlink and uplink signaling.

[0092] At 604, the UE may send an indication of a classification of a link established between the UE and the network node via the RIS to the network node or to another UE. The UE may send the indication to the network node via the RIS. In some aspects, the UE may send a CSI report to the network node indicating reciprocity of a link associated with a reported CSI-RS source indicator (CRI) or SSB source indicator (SSBRI).

[0093] In some aspects, the UE may send a UE beam correspondence capability to the network node indicating that the UE meets the beam correspondence requirement without uplink beam scanning. The UE beam correspondence capability may be observed based at least in part on the link being associated with reciprocity. The UE beam correspondence capability may not be observed based at least in part on the link not being associated with reciprocity. In other words, when the link is not associated with reciprocity, the UE beam correspondence capability may be ignored.

[0094] At 606, the UE may perform an action based at least in part on the classification of the link. In some aspects, the UE may receive an SSB or CSI-RS from a network node and via a link that is not associated with reciprocity. When performing the action, the UE may prevent the SSB or CSI-RS from being used as spatial relationship information or as an associated CSI-RS. The UE may not use or may prohibit the use of SSB or CSI-RS as spatial relationship information or as an associated CSI-RS. Alternatively, when performing the action, the UE may prevent the SSB or CSI-RS from being used as a path loss reference signal for uplink transmission. The UE may not use or may prohibit the use of SSB or CSI-RS as a path loss reference signal for uplink transmission. In some aspects, the UE may receive a positioning reference signal (PRS) or an SRS for positioning from a network node and via a link that is not associated with reciprocity. When performing the action, the UE may prevent the PRS or the SRS for positioning from being used for positioning, wherein the positioning may include positioning based on round-trip time (RTT). The UE may not use or may disable the use of PRS or SRS for positioning. In some aspects, the UE may receive a reference signal (e.g., SRS) via a link not associated with reciprocity. When performing the action, the UE may prevent the reference signal from being used for bidirectional cross-link interference (CLI) measurements. The UE may not use or may disable the use of a reference signal for bidirectional CLI measurements. Bidirectional CLI measurements may be performed between a UE and another UE.

[0095] In some aspects, the UE may select a sensing beam based at least in part on whether the transmit beam is associated with reciprocity. The sensing beam may correspond to the transmit beam based at least in part on the transmit beam being associated with reciprocity. Based at least in part on the transmit beam not being associated with reciprocity, the sensing beam may be a wide beam (e.g., a beam having a spatially wide width) compared to the transmit beam.

[0096] In some aspects, the UE and / or the network node may perform per-beam reciprocity handling. In some aspects, for CSI, the UE may report the reciprocity associated with each CRI or SSBRI via a CSI report. The reported reciprocity may indicate a binary classification (e.g., a given reported CRI / SSBRI is reciprocal or non-reciprocal), or the reported reciprocity may indicate a measure of reciprocity. In some aspects, for the beam correspondence assumption, beam correspondence may not be assumed for some links regardless of the beam correspondence capability of the UE. For example, even when the UE reports beamCorrespondenceWithoutUL-BeamSweeping=1, the capability may only hold for links with a relatively high reciprocity metric. In addition, for links with a relatively low reciprocity metric, the UE may assume that beamCorrespondenceWithoutUL-BeamSweeping is 0.

[0097] In some aspects, for SRS configuration, SSB / CSI-RS associated with relatively low reciprocity beams / links may be prevented from being used as spatial relation information (e.g., SRS for antenna switching) or as associated CSI-RS (e.g., non-codebook based uplink). In some aspects, for uplink power control, SSB / CSI-RS associated with relatively low reciprocity beams / links may be prevented from being used as path loss reference signals for uplink transmissions (such as physical uplink control channel (PUCCH) transmissions, physical uplink shared channel (PUSCH) transmissions, or SRS transmissions).

[0098] In some aspects, PRS and SRS (used for positioning) associated with relatively low reciprocity beams / links may be prevented from being used for positioning, including RTT-based positioning. In some aspects, for CLI measurements (e.g., for full-duplex operation), reference signals (e.g., SRS) associated with relatively low reciprocity beams / links may be prevented from being used for bidirectional CLI measurements. The interference from the second UE to the first UE may be different from the interference from the first UE to the second UE. Therefore, a separate unidirectional CLI measurement may be used for each UE. In some aspects, for unlicensed band operation, the UE may report beamCorrespondenceWithoutUL-BeamSweeping=1. Sensing beam selection may depend on whether the transmit beam maintains reciprocity. For a transmit beam with a relatively high reciprocity beam / link (e.g., corresponding to a direct path), the sensing beam may be the same as the transmit beam. For a transmit beam with a relatively low reciprocity beam / link (eg, corresponding to a reflected path from a RIS), a beam wider than the transmit beam (eg, a pseudo-omni beam) may be used for sensing.

[0099] As indicated above, Figure 6 are provided as examples. Other examples can be found in the Figure 6 The examples described are different.

[0100] Figure 7 7 is a flow chart of an example method 700 of wireless communication. The method 700 may be performed by, for example, a UE (eg, UE 120).

[0101] At 710, the UE may send an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity. Fig. 9 The communication manager 140 and / or the sending component 904 depicted in the figure may send an indication of a classification of a link established between the UE and the network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity, as described above in conjunction with, for example Figure 6 and as described at 604 .

[0102] In some aspects, the classification of the link is a binary classification, wherein a first classification is associated with a link being associated with reciprocity and a second classification is associated with a link not being associated with reciprocity. In some aspects, the classification of the link is based at least in part on a metric associated with the link, wherein the link is associated with the reciprocity based at least in part on the metric satisfying a threshold, and the link is not associated with the reciprocity based at least in part on the metric not satisfying the threshold, and wherein the threshold is based at least in part on one or more of a network node specific implementation, a network node capability, a UE specific implementation, or a UE capability.

[0103] In some aspects, the link is associated with reciprocity depending on one or more link characteristics associated with the link. In some aspects, the one or more link characteristics are associated with a path between the UE and the network node, wherein the path is one or more of a direct path between the UE and the network node or a reflected path between the UE and the network via a RIS, and the reciprocity is a function based at least in part on a weight for each path associated with the link and a combination of the direct path and the reflected path, or the one or more link characteristics are associated with one or more of an angle of incidence of a signal directed toward the RIS or an angle of reflection of a signal reflected from the RIS.

[0104] In some aspects, the classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined based at least in part on a comparison between reported CSI associated with a downlink CSI-RS and measured CSI associated with an uplink SRS. In some aspects, the classification of the link is defined by an operator during initial deployment of the network node and the RIS, and reciprocity is associated with the SSB beam.

[0105] At 720, the UE may perform an action based at least in part on the classification of the link. For example, the UE (e.g., using Fig. 9 The communication manager 140 and / or action component 908 depicted in FIG. 1 may perform actions based at least in part on the classification of the link, as described above in conjunction with, for example, Figure 6 And as described at 606.

[0106] In some aspects, the method 700 includes sending a CSI report to a network node indicating reciprocity of a link associated with a reported CRI or SSBRI. In some aspects, the method 700 includes sending a UE beam correspondence capability to the network node indicating that the UE meets the beam correspondence requirement without uplink beam scanning, wherein the UE beam correspondence capability is observed at least in part based on the link being associated with reciprocity, or the UE beam correspondence capability is not observed at least in part based on the link not being associated with reciprocity. In some aspects, the method 700 includes receiving an SSB or CSI-RS from the network node and via a link not associated with reciprocity, and performing an action includes preventing the SSB or CSI-RS from being used as spatial relationship information or as an associated CSI-RS, or preventing the SSB or CSI-RS from being used as a path loss reference signal for uplink transmissions.

[0107] In some aspects, method 700 includes receiving a PRS or SRS for positioning from a network node and via a link not associated with reciprocity, and performing an action includes preventing the PRS or SRS for positioning from being used for positioning, and positioning includes RTT-based positioning. In some aspects, method 700 includes receiving a reference signal via a link not associated with reciprocity, wherein the reference signal is an SRS, and performing an action includes preventing the reference signal from being used for bidirectional CLI measurements. In some aspects, method 700 includes selecting a sensing beam based at least in part on whether the transmit beam is associated with reciprocity, wherein based at least in part on the transmit beam being associated with reciprocity, the sensing beam corresponds to the transmit beam, or based at least in part on the transmit beam not being associated with reciprocity, the sensing beam is a wide beam compared to the transmit beam.

[0108] although Figure 7 An example block diagram of method 700 is shown, but in some aspects, method 700 may include Figure 7 The blocks depicted in the method 700 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the method 700. Additionally or alternatively, two or more blocks in the blocks of the method 700 may be executed in parallel.

[0109] Figure 8 is a flow chart of an example method 800 of wireless communication. The method 800 may be performed, for example, by a network node (eg, network node 110).

[0110] At 810, the network node may send an indication of a classification of a link established between the network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS. Fig.11The transmitting component 1104 depicted in the figure can send an indication of a classification of a link established between the network node and the UE via RIS to the UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via RIS, as described above in conjunction with, for example Figure 6 and as described at 604. In some aspects, classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined at least in part on a comparison between reported CSI associated with a downlink CSI-RS and measured CSI associated with an uplink SRS.

[0111] although Figure 8 An example block diagram of method 800 is shown, but in some aspects, method 800 may include Figure 8 The blocks depicted in the method 800 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the method 800. Additionally or alternatively, two or more of the blocks in the method 800 may be executed in parallel.

[0112] Fig. 9 900 is a diagram of an example apparatus 900 for wireless communication. The apparatus 900 may be a UE, or the UE may include the apparatus 900. In some aspects, the apparatus 900 includes a receiving component 902 and a sending component 904, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using the receiving component 902 and the sending component 904. As further shown, the apparatus 900 may include a communication manager 140. The communication manager 140 may include one or more of an action component 908 or a selection component 910, etc.

[0113] In some aspects, the apparatus 900 may be configured to perform Figure 6 Additionally or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as Figure 7 In some aspects, the apparatus 900 and / or Fig. 9 One or more of the components shown in the figure may include a combination of Figure 2 Additionally or alternatively, Fig. 9 One or more of the components shown may be combined with Figure 2Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0114] The receiving component 902 may receive communications from the device 906, such as reference signals, control information, data communications, or combinations thereof. The receiving component 902 may provide the received communications to one or more other components of the device 900. In some aspects, the receiving component 902 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 900. In some aspects, the receiving component 902 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a described UE.

[0115] The transmitting component 904 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 906. In some aspects, one or more other components of the device 900 may generate communications and may provide the generated communications to the transmitting component 904 for transmission to the device 906. In some aspects, the transmitting component 904 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 906. In some aspects, the transmitting component 904 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, the transmit component 904 can be co-located with the receive component 902 in a transceiver.

[0116] The sending component 904 can send an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity. The action component 908 can perform an action based at least in part on the classification of the link.

[0117] The transmitting component 904 can transmit a CSI report indicating reciprocity of a link associated with the reported CRI or SSBRI to the network node. The transmitting component 904 transmits to the network node a UE beam correspondence capability indicating that the UE satisfies the beam correspondence requirement without uplink beam scanning, wherein the UE beam correspondence capability is observed based at least in part on the link being associated with reciprocity, or the UE beam correspondence capability is not observed based at least in part on the link not being associated with reciprocity.

[0118] The receiving component 902 may receive an SSB or CSI-RS from a network node and via a link not associated with reciprocity. The action component 908 may prevent the SSB or CSI-RS from being used as spatial relationship information or as an associated CSI-RS, or prevent the SSB or CSI-RS from being used as a path loss reference signal for uplink transmission. The receiving component 902 may receive a PRS or SRS for positioning via a link not associated with reciprocity. The action component 908 may prevent the PRS or SRS for positioning from being used for positioning. The receiving component 902 may receive a reference signal from a network node and via a link not associated with reciprocity. The action component 908 may prevent the reference signal from being used for bidirectional CLI measurements.

[0119] The selection component 910 can select the sensing beam based at least in part on whether the transmit beam is associated with reciprocity, wherein the sensing beam corresponds to the transmit beam based at least in part on that the transmit beam is associated with reciprocity, or the sensing beam is a wide beam compared to the transmit beam based at least in part on that the transmit beam is not associated with reciprocity.

[0120] Fig. 9 The number and arrangement of components shown are provided as examples. Fig. 9 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig. 9 Two or more components shown may be implemented in a single component, or Fig. 9 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig. 9 The illustrated set of component(s) may be described as being executable by Fig. 9 Another collection of components shown performs one or more functions.

[0121] Fig.10 is a diagram illustrating an example 1000 of a hardware implementation for an apparatus 1005 employing a processing system 1010. The apparatus 1005 may be a UE.

[0122] The processing system 1010 may be implemented using a bus architecture, generally represented by bus 1015. Bus 1015 may include any number of interconnecting buses and bridges, depending on the specific application of the processing system 1010 and the overall design constraints. Bus 1015 links together various circuits including one or more processors and / or hardware components (represented by processor 1020, illustrated components, and computer readable media / memory 1025). Bus 1015 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and / or power management circuits.

[0123] The processing system 1010 may be coupled to a transceiver 1030. The transceiver 1030 is coupled to one or more antennas 1035. The transceiver 1030 provides components for communicating with various other devices through a transmission medium. The transceiver 1030 receives signals from one or more antennas 1035, extracts information from the received signals, and provides the extracted information to the processing system 1010 (specifically, the receiving component 902). In addition, the transceiver 1030 receives information from the processing system 1010 (specifically, the transmitting component 904) and generates a signal to be applied to the one or more antennas 1035 based at least in part on the received information.

[0124] The processing system 1010 includes a processor 1020 coupled to a computer readable medium / memory 1025. The processor 1020 is responsible for general processing, including executing software stored on the computer readable medium / memory 1025. The software, when executed by the processor 1020, causes the processing system 1010 to perform various functions described herein for any particular device. The computer readable medium / memory 1025 may also be used to store data manipulated by the processor 1020 when executing the software. The processing system also includes at least one of the illustrated components. A component may be: a software module running in the processor 1020, resident / stored in the computer readable medium / memory 1025, one or more hardware modules coupled to the processor 1020, or some combination thereof.

[0125] In some aspects, the processing system 1010 may be a component of the UE 120 and may include the memory 282, and / or at least one of the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280. In some aspects, the apparatus 1005 for wireless communication includes: means for sending an indication of a classification of a link established between the UE and the network node via a RIS to a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS; and means for performing an action based at least in part on the classification of the link. The aforementioned means may be one or more of the aforementioned components of the processing system 1010 of the apparatus 900 and / or the apparatus 1005 configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 1010 may include the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280. In one configuration, the aforementioned components may be the TX MIMO processor 266, the RX processor 258, and / or the controller / processor 280 configured to perform the functions and / or operations stated herein.

[0126] Fig.10 are provided as examples. Other examples can be combined with Fig.10 The examples described are different.

[0127] Fig.11 1 is a diagram of an example apparatus 1100 for wireless communication. Apparatus 1100 may be a network node, or a network node may include apparatus 1100. In some aspects, apparatus 1100 includes a receiving component 1102 and a transmitting component 1104, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using receiving component 1102 and transmitting component 1104.

[0128] In some aspects, the apparatus 1100 may be configured to perform Figure 6 Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as Figure 8 The process 800. In some aspects, Fig.11 The device 1100 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Fig.11 One or more of the components shown may be combined with Figure 2Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0129] The receiving component 1102 may receive communications from the device 1106, such as reference signals, control information, data communications, or combinations thereof. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some aspects, the receiving component 1102 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 1100. In some aspects, the receiving component 1102 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof, of the described network nodes.

[0130] The transmitting component 1104 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1106. In some aspects, one or more other components of the device 1100 may generate communications and may provide the generated communications to the transmitting component 1104 for transmission to the device 1106. In some aspects, the transmitting component 1104 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 1106. In some aspects, the transmitting component 1104 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described network nodes. In some aspects, the transmit component 1104 can be co-located with the receive component 1102 in a transceiver.

[0131] Transmitting component 1104 may transmit to the UE an indication of a classification of a link established between the network node and the UE via a RIS, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity comprises beam correspondence and channel reciprocity via the RIS.

[0132] Fig.11 The number and arrangement of components shown are provided as examples. Fig.11 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.11 Two or more components shown may be implemented in a single component, or Fig.11 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.11 The illustrated set of component(s) may be described as being executable by Fig.11 Another collection of components shown performs one or more functions.

[0133] Fig.12 is a diagram illustrating an example 1200 of a hardware implementation for an apparatus 1205 employing a processing system 1210. The apparatus 1205 may be a network node.

[0134] The processing system 1210 may be implemented using a bus architecture, generally represented by bus 1215. Bus 1215 may include any number of interconnecting buses and bridges, depending on the specific application of the processing system 1210 and the overall design constraints. Bus 1215 links together various circuits including one or more processors and / or hardware components (represented by processor 1220, illustrated components, and computer readable media / memory 1225). Bus 1215 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and / or power management circuits.

[0135] The processing system 1210 may be coupled to a transceiver 1230. The transceiver 1230 is coupled to one or more antennas 1235. The transceiver 1230 provides components for communicating with various other devices through a transmission medium. The transceiver 1230 receives signals from one or more antennas 1235, extracts information from the received signals, and provides the extracted information to the processing system 1210 (specifically the receiving component 1102). In addition, the transceiver 1230 receives information from the processing system 1210 (specifically the transmitting component 1104) and generates a signal to be applied to one or more antennas 1235 based at least in part on the received information.

[0136] The processing system 1210 includes a processor 1220 coupled to a computer readable medium / memory 1225. The processor 1220 is responsible for general processing, including executing software stored on the computer readable medium / memory 1225. The software, when executed by the processor 1220, causes the processing system 1210 to perform the various functions described herein for any particular device. The computer readable medium / memory 1225 may also be used to store data manipulated by the processor 1220 when executing the software. The processing system also includes at least one of the illustrated components. A component may be: a software module running in the processor 1220, resident / stored in the computer readable medium / memory 1225, one or more hardware modules coupled to the processor 1220, or some combination thereof.

[0137] In some aspects, the processing system 1210 may be a component of the base station 110 and may include the memory 242, and / or at least one of the TX MIMO processor 230, the RX processor 238, and / or the controller / processor 240. In some aspects, the apparatus 1205 for wireless communication includes means for sending an indication of a classification of a link established between a network node and the UE via a RIS to a UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS. The aforementioned means may be one or more of the aforementioned components of the processing system 1210 of the apparatus 1100 and / or the apparatus 1205 configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system 1210 may include the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240. In one configuration, the aforementioned components may be the TX MIMO processor 230, the receive processor 238, and / or the controller / processor 240 configured to perform the functions and / or operations stated herein.

[0138] Fig.12 are provided as examples. Other examples can be combined with Fig.12 The examples described are different.

[0139] The following provides an overview of some aspects of the disclosure:

[0140] Aspect 1: A method of wireless communication performed by a device of a user equipment (UE), the method comprising: sending an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and performing an action based at least in part on the classification of the link.

[0141] Aspect 2: The method according to aspect 1, wherein the classification of the link is a binary classification, wherein a first classification is associated with the link being associated with the reciprocity, and a second classification is associated with the link not being associated with the reciprocity.

[0142] Aspect 3: A method according to any one of Aspects 1 to 2, wherein the classification of the link is based at least in part on a metric associated with the link, wherein the link is associated with the reciprocity based at least in part on the metric satisfying a threshold, and the link is not associated with the reciprocity based at least in part on the metric not satisfying the threshold, and wherein the threshold is based at least in part on one or more of a network node specific implementation, a network node capability, a UE specific implementation, or a UE capability.

[0143] Aspect 4: The method according to any one of aspects 1 to 3, wherein the link is associated with the reciprocity depending on one or more link characteristics associated with the link.

[0144] Aspect 5: A method according to Aspect 4, wherein: the one or more link characteristics are associated with a path between the UE and the network node, wherein the path is one or more of a direct path between the UE and the network node or a reflection path between the UE and the network node via a reconfigurable smart surface (RIS), and wherein the reciprocity is a function based at least in part on a weight of each path associated with the link and a combination of a direct path and a reflection path; or the one or more link characteristics are associated with one or more of an angle of incidence of a signal directed to the RIS or an angle of reflection of a signal reflected from the RIS.

[0145] Aspect 6: A method according to any one of Aspects 1 to 5, wherein the classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

[0146] Aspect 7: A method according to any one of Aspects 1 to 6, wherein the classification of the link is defined by an operator during initial deployment of network nodes and a reconfigurable smart surface (RIS), and wherein the reciprocity is associated with a synchronization signal block beam.

[0147] Aspect 8: According to the method described in any one of Aspects 1 to 7, the method further includes: sending a channel state information report to a network node, wherein the channel state information report indicates the reciprocity of the link associated with the reported channel state information reference signal resource indicator or synchronization signal block resource indicator.

[0148] Aspect 9: According to the method described in any one of Aspects 1 to 8, the method further includes: sending a UE beam correspondence capability to a network node indicating that the UE meets the beam correspondence requirement without uplink beam scanning, wherein the UE beam correspondence capability is observed at least in part based on the link being associated with the reciprocity, or the UE beam correspondence capability is not observed at least in part based on the link not being associated with the reciprocity.

[0149] Aspect 10: According to any one of aspects 1 to 9, the method further includes: receiving a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) from a network node and via the link not associated with the reciprocity; and wherein performing the action includes: preventing the SSB or the CSI-RS from being used as spatial relationship information or as an associated CSI-RS; or preventing the SSB or the CSI-RS from being used as a path loss reference signal for uplink transmission. Wherein performing the action includes: preventing the SSB or the CSI-RS from being used as spatial relationship information or as an associated CSI-RS; or preventing the SSB or the CSI-RS from being used as a path loss reference signal for uplink transmission.

[0150] Aspect 11: According to any one of Aspects 1 to 10, the method further includes: receiving a positioning reference signal (PRS) or a sounding reference signal (SRS) for positioning from a network node and via the link that is not associated with the reciprocity; and wherein performing the action includes preventing the PRS or the SRS for positioning from being used for positioning, and wherein the positioning includes positioning based on round-trip time.

[0151] Aspect 12: According to any one of Aspects 1 to 11, the method further includes: receiving a reference signal via the link that is not associated with the reciprocity, wherein the reference signal is a sounding reference signal; and wherein performing the action includes preventing the reference signal from being used for bidirectional cross-link interference measurement.

[0152] Aspect 13: According to the method described in any one of Aspects 1 to 12, the method further includes: selecting a sensing beam based at least in part on whether the transmit beam is associated with the reciprocity, wherein at least in part based on the transmit beam being associated with the reciprocity, the sensing beam corresponds to the transmit beam, or at least in part based on the transmit beam not being associated with the reciprocity, the sensing beam is a wide beam compared to the transmit beam.

[0153] Aspect 14: A method of wireless communication performed by an apparatus of a network node, the method comprising: sending an indication of a classification of a link established between the network node and the UE via a reconfigurable smart surface (RIS) to a user equipment (UE), wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

[0154] Aspect 15: A method according to Aspect 14, wherein the classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

[0155] Aspect 16: An apparatus for performing wireless communications at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 1 to 13.

[0156] Aspect 17: A device for wireless communication, the device comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 1 to 13.

[0157] Aspect 18: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 13.

[0158] Aspect 19: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 13.

[0159] Aspect 20: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 13.

[0160] Aspect 21: An apparatus for performing wireless communications at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 14 to 15.

[0161] Aspect 22: A device for wireless communication, the device comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 14 to 15.

[0162] Aspect 23: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 14 to 15.

[0163] Aspect 24: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 14 to 15.

[0164] Aspect 25: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 14 to 15.

[0165] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be acquired from practice of the various aspects.

[0166] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, etc. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be apparent that the systems and / or methods described herein can be implemented by a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, there is no reference to a specific software code herein to describe the operation and behavior of the system and / or method, because those skilled in the art will understand that software and hardware can be designed to implement the system and / or method based at least in part on the description herein.

[0167] As used herein, "satisfying a threshold" may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0168] Although the specific combination of features is set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner that is not specifically described in the claims and / or is not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). As an example, "at least one of a, b or c" is intended to cover a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (for example, a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other ordering of a, b and c).

[0169] Any element, action or instruction used herein should not be interpreted as critical or necessary unless clearly stated. In addition, as used herein, the article "one" is intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more items connected to the article "said", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items, and can be used interchangeably with "one or more". If you only want to refer to an item, the phrase "only one" or similar terms will be used. Moreover, as used herein, the term "having" etc. is intended to be an open term, which does not limit the elements they modify (for example, "having" A elements can also have B). In addition, the phrase "based on" is intended to mean "based at least in part on", unless explicitly stated otherwise. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended and used interchangeably with "and / or" unless explicitly stated otherwise (e.g., if used in conjunction with "either" or "only one of").

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and one or more processors coupled to the memory, the one or more processors configured to: sending an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and An action is performed based at least in part on the classification of the link.

2. The apparatus of claim 1, wherein the classification of the link is a binary classification, wherein a first classification is associated with the link being associated with the reciprocity, and a second classification is associated with the link not being associated with the reciprocity.

3. An apparatus according to claim 1, wherein the classification of the link is based at least in part on a metric associated with the link, wherein the link is associated with the reciprocity based at least in part on the metric satisfying a threshold, and the link is not associated with the reciprocity based at least in part on the metric not satisfying the threshold, and wherein the threshold is based at least in part on one or more of a network node specific implementation, a network node capability, a UE specific implementation, or a UE capability.

4. The apparatus of claim 1, wherein the link is associated with the reciprocity depending on one or more link characteristics associated with the link.

5. The device according to claim 4, wherein: The one or more link characteristics are associated with a path between the UE and a network node, wherein the path is one or more of a direct path between the UE and the network node or a reflected path between the UE and the network node via a reconfigurable smart surface (RIS), and wherein the reciprocity is a function based at least in part on a weight for each path associated with the link and a combination of a direct path and a reflected path; or The one or more link characteristics are associated with one or more of an angle of incidence of a signal directed toward the RIS or an angle of reflection of a signal reflected from the RIS.

6. An apparatus according to claim 1, wherein the classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

7. The apparatus of claim 1, wherein the classification of the link is defined by an operator during initial deployment of network nodes and a reconfigurable smart surface (RIS), and wherein the reciprocity is associated with a synchronization signal block beam.

8. The apparatus of claim 1, wherein the one or more processors are further configured to: A channel state information report is sent to a network node, the channel state information report indicating the reciprocity of the link associated with a reported channel state information reference signal resource indicator or synchronization signal block resource indicator.

9. The apparatus of claim 1 , wherein the one or more processors are further configured to: Sending a UE beam correspondence capability to a network node indicating that the UE satisfies the beam correspondence requirement without uplink beam scanning, wherein the UE beam correspondence capability is observed at least in part based on the link being associated with the reciprocity, or the UE beam correspondence capability is not observed at least in part based on the link not being associated with the reciprocity.

10. The apparatus of claim 1, wherein the one or more processors are further configured to: receiving a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) from a network node and via the link not associated with the reciprocity; and Wherein, in order to perform the actions, the one or more processors are configured to: preventing the SSB or the CSI-RS from being used as spatial relation information or as an associated CSI-RS; or The SSB or the CSI-RS is prevented from being used as a path loss reference signal for uplink transmission.

11. The apparatus of claim 1 , wherein the one or more processors are further configured to: receiving a positioning reference signal (PRS) or a sounding reference signal (SRS) for positioning from a network node and via the link not associated with the reciprocity; and Wherein to perform the actions, the one or more processors are configured to prevent the PRS or the SRS used for positioning from being used for positioning, and wherein the positioning comprises round trip time based positioning.

12. The apparatus of claim 1, wherein the one or more processors are further configured to: receiving a reference signal via the link not associated with the reciprocity, wherein the reference signal is a sounding reference signal; and Wherein to perform the actions, the one or more processors are configured to prevent the reference signal from being used for bidirectional cross-link interference measurement.

13. The apparatus of claim 1 , wherein the one or more processors are further configured to: A sensing beam is selected based at least in part on whether a transmit beam is associated with the reciprocity, wherein the sensing beam corresponds to the transmit beam based at least in part on that the transmit beam is associated with the reciprocity, or the sensing beam is a wide beam compared to the transmit beam based at least in part on that the transmit beam is not associated with the reciprocity.

14. An apparatus for wireless communication at a network node, the apparatus comprising: Memory; and one or more processors coupled to the memory, the one or more processors configured to: Sending a request to a user equipment (UE) via a reconfigurable smart surface (RIS) an indication of a classification of a link established between the network node and the UE, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

15. An apparatus according to claim 14, wherein the classification of the link is based at least in part on a bidirectional sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

16. A method of wireless communication performed by a device of a user equipment (UE), the method comprising: sending an indication of a classification of a link established between the UE and a network node, wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity; and An action is performed based at least in part on the classification of the link.

17. The method of claim 16, wherein the classification of the link is a binary classification, wherein a first classification is associated with the link being associated with the reciprocity and a second classification is associated with the link not being associated with the reciprocity.

18. A method according to claim 16, wherein the classification of the link is based at least in part on a metric associated with the link, wherein the link is associated with the reciprocity based at least in part on the metric satisfying a threshold, and the link is not associated with the reciprocity based at least in part on the metric not satisfying the threshold, and wherein the threshold is based at least in part on one or more of a network node specific implementation, a network node capability, a UE specific implementation, or a UE capability.

19. The method of claim 16, wherein the link is associated with the reciprocity depending on one or more link characteristics associated with the link.

20. The method of claim 19, wherein: The one or more link characteristics are associated with a path between the UE and a network node, wherein the path is one or more of a direct path between the UE and the network node or a reflected path between the UE and the network node via a reconfigurable smart surface (RIS), and wherein the reciprocity is a function based at least in part on a weight for each path associated with the link and a combination of a direct path and a reflected path; or The one or more link characteristics are associated with one or more of an angle of incidence of a signal directed toward the RIS or an angle of reflection of a signal reflected from the RIS.

21. A method according to claim 16, wherein the classification of the link is based at least in part on a two-way sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

22. The method of claim 16, wherein the classification of the link is defined by an operator during initial deployment of network nodes and a reconfigurable intelligent surface (RIS), and wherein the reciprocity is associated with a synchronization signal block beam.

23. The method according to claim 16, further comprising: A channel state information report is sent to a network node, the channel state information report indicating the reciprocity of the link associated with a reported channel state information reference signal resource indicator or synchronization signal block resource indicator.

24. The method according to claim 16, further comprising: Sending a UE beam correspondence capability to a network node indicating that the UE satisfies the beam correspondence requirement without uplink beam scanning, wherein the UE beam correspondence capability is observed at least in part based on the link being associated with the reciprocity, or the UE beam correspondence capability is not observed at least in part based on the link not being associated with the reciprocity.

25. The method according to claim 16, further comprising: receiving a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) from a network node and via the link not associated with the reciprocity; and The execution of the actions includes: Preventing the SSB or the CSI-RS from being used as spatial relation information or as an associated CSI-RS; or The SSB or the CSI-RS is prevented from being used as a path loss reference signal for uplink transmission.

26. The method according to claim 16, further comprising: receiving a positioning reference signal (PRS) or a sounding reference signal (SRS) for positioning from a network node and via the link not associated with the reciprocity; and Wherein performing the action comprises preventing the PRS or the SRS used for positioning from being used for positioning, and wherein the positioning comprises round trip time based positioning.

27. The method according to claim 16, further comprising: receiving a reference signal via the link not associated with the reciprocity, wherein the reference signal is a sounding reference signal; and Wherein performing the actions includes preventing the reference signal from being used for bidirectional cross-link interference measurements.

28. The method of claim 16, further comprising: A sensing beam is selected based at least in part on whether a transmit beam is associated with the reciprocity, wherein the sensing beam corresponds to the transmit beam based at least in part on that the transmit beam is associated with the reciprocity, or the sensing beam is a wide beam compared to the transmit beam based at least in part on that the transmit beam is not associated with the reciprocity.

29. A method of wireless communication performed by an apparatus of a network node, the method comprising: An indication of a classification of a link established between the network node and the UE via a reconfigurable intelligent surface (RIS) is sent to a user equipment (UE), wherein the classification indicates whether the link is associated with reciprocity, and wherein the reciprocity includes beam correspondence and channel reciprocity via the RIS.

30. A method according to claim 29, wherein the classification of the link is based at least in part on a two-way sounding procedure, wherein the classification of the link is determined at least in part based on a comparison between reported channel state information (CSI) associated with a downlink channel state information reference signal and measured CSI associated with an uplink sounding reference signal.

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