Phase control and / or phase calibration for network controlled repeaters

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a network node may receive a network controlled relay (NCR) capability report from a NCR, the NCR capability report indicating support for NCR forwarding beamforming and a number of NCR radio frequency (RF) chains. The network node may facilitate, based at least in part on the NCR capability report, one or more of phase control for the number of NCR RF chains supporting multiple input multiple output (MIMO) operations, or phase calibration for the NCR. Numerous other aspects are described.

Description

Technical Field

[0001] Various aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for phase control and / or phase calibration for a network controlled repeater (NCR). Background Art

[0002] 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).

[0003] 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. The UE may communicate with the network nodes 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 sidelink (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, etc.).

[0004] 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. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR 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 LTE, NR and other radio access technologies remain useful. Summary of the invention

[0005] In some specific embodiments, an apparatus for wireless communication at a network node includes a memory and one or more processors, the one or more processors being coupled to the memory and configured to: receive an NCR capability report from a network controlled repeater (NCR), the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR radio frequency (RF) chains; and facilitate one or more of the following based at least in part on the NCR capability report: phase control of the number of NCR RF chains to support multiple-input multiple-output (MIMO) operations, or phase calibration of the NCR.

[0006] In some specific embodiments, an apparatus for wireless communication at an NCR includes a memory and one or more processors, the one or more processors being coupled to the memory and configured to: send an NCR capability report to a network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains that support MIMO operations, or phase calibration for the NCR.

[0007] In some specific implementations, a method of wireless communication performed by a network node includes: receiving an NCR capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operations, or phase calibration for the NCR.

[0008] In some specific implementations, a method of wireless communication performed by an NCR includes: sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains that support MIMO operations, or phase calibration for the NCR.

[0009] 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: receive an NCR capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains that support MIMO operations, or phase calibration for the NCR.

[0010] 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 an NCR, cause the NCR to: send an NCR capability report to a network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains that support MIMO operations, or phase calibration for the NCR.

[0011] In some specific embodiments, an apparatus for wireless communication includes: a component for receiving an NCR capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains; and a component for facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains that support MIMO operations, or phase calibration for the NCR.

[0012] In some specific embodiments, a device for wireless communication includes: a component for sending a device capability report to a network node, the device capability report indicating support for device forwarding beamforming and a certain number of device RF chains; and a component for facilitating one or more of the following based at least in part on the device capability report: phase control for the number of device RF chains that support MIMO operations, or phase calibration for the device.

[0013] Aspects collectively include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to the drawings and description and as illustrated in the drawings and description.

[0014] The features and technical advantages of examples according to the present disclosure have been outlined quite broadly 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 achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. 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.

[0015] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers) for analog and digital purposes. The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are illustrated in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the specification may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0017] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0018] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0019] Figure 3 is a diagram illustrating an example decomposed base station architecture according to the present disclosure.

[0020] Figure 4 is a diagram illustrating an example of a network controlled repeater (NCR) according to the present disclosure.

[0021] Figure 5 is a diagram illustrating an example of a multi-chain NCR according to the present disclosure.

[0022] Figures 6 to 13 is a diagram illustrating an example associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0023] Figure 14 to Figure 15 is a diagram illustrating an example process associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0024] Figure 16 to Figure 17 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0025] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. It should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods implemented using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0026] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques 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 hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] Although various aspects may be described herein using terms generally associated with 5G or new radio (NR) radio access technologies (RATs), various aspects of the present disclosure may be applicable to other RATs, such as 3G RATs, 4G RATs, and / or post-5G RATs (e.g., 6G).

[0028] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long Term Evolution (LTE)) network, as well as other examples. 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), and / or other entities. The network node 110 is a network node that communicates with the UE 120. As shown in the figure, 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 radio access network (RAN) node (e.g., within a single device or unit). As 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)).

[0029] In some examples, the network node 110 is or includes a network node that communicates with the UE 120 via a radio access link, such as an RU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with a core network via a backhaul link, such as a CU. 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. The network node 110 may include, for example, 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.

[0030] 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 the coverage area of ​​the network node 110 and / or the 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, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) 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 home) 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 1In 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).

[0031] In some aspects, the term "base station" or "network node" may refer to a converged 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 a plurality of 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.

[0032] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and transmit 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 in , 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 communication 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, a relay, etc.

[0033] 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, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts 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).

[0034] 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.

[0035] 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 and / 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 computer, 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 and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node and / or any other suitable device configured to communicate via a wireless or wired medium.

[0036] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that 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 and / 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 and / 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, and / or electrically coupled.

[0037] 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 be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. 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.

[0038] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more side link channels. 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), and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0039] The devices of the wireless network 100 may communicate using an electromagnetic spectrum that may be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, the 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). It should be understood that, although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as a "below 6 GHz" band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as a "millimeter wave" band in documents and articles, although different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU).

[0040] Frequencies between FRI 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 FRI characteristics and / or FR2 characteristics, so the characteristics of FRI and / 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.

[0041] With the above examples in mind, unless otherwise specifically stated, it should be understood that if the term "sub-6 GHz" or the like is used herein, the term may broadly refer to frequencies that may be lower than 6 GHz, may be within FR1, or may include mid-band frequencies. Additionally, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0042] 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 receive an NCR capability report from a network controlled repeater (NCR) indicating support for NCR forwarding beamforming and a number of NCR radio frequency (RF) chains; and facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting multiple input multiple output (MIMO) operations, or phase calibration for the NCR. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0043] In some aspects, an NCR (e.g., NCR 122) may include a communication manager 140. As described in greater detail elsewhere herein, the communication manager 140 may send an NCR capability report to a network node indicating support for NCR forward beamforming and a number of NCR RF chains; and facilitate one or more of: phase control for the number of NCR RF chains supporting MIMO operations, or phase calibration for the NCR based at least in part on the NCR capability report. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0044] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 The examples described are different.

[0045] Figure 2 2 is a diagram illustrating an example 200 of a network node 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. 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 232. 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.

[0046] 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 select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for 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, and / 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) MIMO processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, overhead symbols, and / 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, and / 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 set of corresponding antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0047] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 and / 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, and / 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. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The 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, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0048] 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.

[0049] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or antennas coupled to one or more transmit and / or receive components (such as antennas). Figure 2 One or more antenna elements of one or more components).

[0050] 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, and / 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, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, reference Figures 6 to 17 ) or any aspects of any of the methods described herein.

[0051] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component (shown as DEMOD) of the modem 232), detected by the MIMO detector 236 (where applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and 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 communication and / 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, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform the operations described herein (e.g., reference 2 Figures 6 to 17 ) or any aspects of any of the methods described herein.

[0052] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of may perform one or more techniques associated with phase control and / or phase calibration for NCR, as described in more detail elsewhere herein. In some aspects, the NCR described herein includes Figure 2 In some aspects, the NCR described herein includes Figure 2 1. 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 Fig.14 The process of 1400 Fig.15 1500 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 by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or executed after compilation, conversion, and / or interpretation), may cause the one or more processors, UE 120, and / or network node 110 to perform or direct, for example, Fig.14 The process of 1400 Fig.15 The process 1500 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0053] In some aspects, a network node (e.g., network node 110) includes: a component for receiving an NCR capability report from an NCR, the NCR capability report indicating support for NCR forward beamforming and a certain number of NCR RF chains; and / or a component for facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operations, or phase calibration for the NCR. The components for the network node to perform the 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.

[0054] In some aspects, the NCR (e.g., NCR 122) includes: a component for sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forward beamforming and a certain number of NCR RF chains; and / or a component for facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operations, or phase calibration for the NCR. In some aspects, the components for the NCR to perform the operations described herein may include, for example, one or more of the transmit processor 220, the TX MIMO processor 230, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246. In some aspects, means for the NCR to perform operations described herein may include, for example, one or more of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0055] Although Figure 2 The blocks in the 200 and 210 are illustrated as distinct components, but the functionality described above with respect to these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described with respect to 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.

[0056] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 The examples described are different.

[0057] 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 base station, 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 referred to as an independent base station or a monolithic base station) or a decomposed base station. "Network entity" or "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).

[0058] 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.

[0059] 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.

[0060] Figure 3 3 is a diagram illustrating an example decomposed base station architecture 300 according to the present disclosure. 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 RF access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0061] 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, the wireless interface being configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium, or both.

[0062] 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.

[0063] 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 medium access control (MAC) layer, and one or more high physical (PHY) layers, at least in part, according to a functional split (such as a functional split defined by 3GPP). In some aspects, the 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.

[0064] 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 splitting (e.g., functional splitting 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 control plane communications and user plane communications with 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.

[0065] 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.

[0066] 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 the O-eNB with the near-RT RIC 325.

[0067] 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).

[0068] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 The examples described are different.

[0069] RF repeaters can provide a cost-effective solution for extending network coverage. However, RF repeaters may have various limitations. For example, RF repeaters may simply perform amplification and forwarding operations without being able to consider various factors that can improve performance. NCRs may be an enhancement that is superior to conventional RF repeaters. NCRs may have the ability to receive and process side control information from network nodes. Side control information may allow NCRs to perform amplification and forwarding operations in a more efficient manner. For example, side control information may achieve various benefits, such as mitigating unnecessary noise amplification, transmitting and receiving with better spatial directivity, and / or simplified network integration.

[0070] NCR (such as NR NCR) can be an in-band RF repeater for extending network coverage on FR1 and FR2 bands based at least in part on the NCR model. NCR can be a single-hop fixed NCR. NCR can be transparent to UE. NCR can maintain network node-repeater link and repeater-UE link at the same time. NCR can support various side control information for controlling NCR forwarding (NCR-Fwd) of NCR. Such side control information may include information about beamforming, uplink-downlink (UL-DL) time division duplex (TDD) and / or on-off information.

[0071] Figure 4 is a diagram illustrating an example 400 of an NCR according to the present disclosure.

[0072] like Figure 4As shown, the NCR may include an NCR mobile terminal (NCR-MT) and an NCR-Fwd. The NCR-MT may be a functional entity configured to communicate with a network node via a control link between the NCR-MT and a network node (e.g., a gNB). The control link may be based at least in part on the NR Uu interface. The NCR-MT may communicate with the network node to implement information exchange (e.g., side control information). The control of the NCR-Fwd may be based at least in part on the side control information. The NCR-Fwd may be a functional entity configured to perform amplification and forwarding of uplink / downlink RF signals between the network node and the UE via a backhaul link and an access link. The NCR-Fwd may communicate with the network node via a backhaul link between the NCR-Fwd and the network node. The NCR-Fwd may communicate with the UE via an access link between the NCR-Fwd and the UE. The behavior of the NCR-Fwd may be controlled according to receiver-side control information from the network node. At least one of the carriers of the NCR-MT may be within a group of carriers forwarded by the NCR-Fwd in the same frequency range. NCR-MT and NCR-Fwd can operate in the same carrier.

[0073] As indicated above, Figure 4 are provided as examples. Other examples can be found in the Figure 4 The examples described are different.

[0074] Figure 5 is a diagram illustrating an example 500 of a multi-chain NCR according to the present disclosure.

[0075] like Figure 5 As shown, the multi-chain NCR may be located between the network node and the UE. The multi-chain NCR may have multiple RF chains. The multi-chain NCR may perform amplification and forwarding of uplink / downlink RF signals between the network node and the UE. In this example, the multi-chain NCR may include a first RF chain and a second RF chain. The first RF chain may support amplification and forwarding of uplink and downlink RF signals. The second RF chain may support amplification and forwarding of uplink and downlink RF signals. For example, in the first RF chain, the uplink signal may be transmitted by , and the downlink signal can be represented by , where A and B indicate the amplification gain of the first RF chain, indicates the uplink phase of the first RF chain, and Indicates the downlink phase of the first RF chain. In the second RF chain, the uplink signal can be , and the downlink signal can be represented by , where A and B indicate the amplification gain of the second RF chain, indicates the uplink phase of the second RF chain, and Indicates the downlink phase of the second RF chain. Multiple RF chains may be associated with phase differences between the RF chains with respect to downlink and uplink. Different uplink / downlink amplifiers of different RF chains may introduce different phase shifts. In addition, different phases of different RF chains may be associated with certain time-varying properties.

[0076] A signal (y) associated with a network node can be expressed by y=(H r Φ UL (t)G) T x UL +n definition, where H r Indicates the channel between the multi-chain NCR and the UE, Φ UL indicates the uplink phase, G indicates the channel between the multi-chain NCR and the network node, x UL indicates an uplink signal, and n indicates noise. The signal (y) associated with the UE can be expressed by y=H r Φ DL (t)Gx DL +n definition, where H r Indicates the channel between the multi-chain NCR and the UE, Φ DL indicates the downlink phase, G indicates the channel between the multi-chain NCR and the network node, x DL indicates an uplink signal, and n indicates noise.

[0077] As indicated above, Figure 5 are provided as examples. Other examples can be found in the Figure 5 The examples described are different.

[0078] Phase coherence may be required in multi-chain NCR for FRI. Various phase coherence requirements may be required for frequency division duplex (FDD) or TDD MIMO operation. For MIMO precoding adaptation, the first phase coherence requirement may be Φ UL (t 1 )≈αΦ UL (t 2 ), where Φ UL Indicates the uplink phase, t 1 indicates the time when a sounding reference signal (SRS) is transmitted from the UE, α indicates a scalar complex value, and t 2 Indicates the time when the Physical Uplink Shared Channel (PUSCH) is sent from the UE. In other words, t 1 SRS transmission at t 2 There should be phase consistency between PUSCH transmissions at . For MIMO precoding adaptation, the second phase coherence requirement can be Φ DL (t 1 )≈βΦ DL (t2 ), where Φ DL Indicates the downlink phase, t 1 indicates the time when a channel state information reference signal (CSI-RS) is sent from a network node, β indicates a scalar complex value, and t 2 Indicates the time when the Physical Downlink Shared Channel (PDSCH) is sent from the network node. In other words, t 1 The CSI-RS transmission at t 2 There should be phase consistency between PDSCH transmissions at . For uplink / downlink reciprocity, the third phase coherence requirement can be Φ UL (t 1 )≈γΦ DL (t 2 ), where t 1 indicates the time when the SRS is received in the network node, γ indicates a scalar complex value, and t 2 Indicates the time when the PDSCH is sent from the network node.

[0079] The phase associated with each NCR chain may be different. For example, a first downlink phase associated with a first RF chain of a multi-chain NCR may be different from a second downlink phase associated with a second RF chain of a multi-chain NCR. A first uplink phase associated with a first RF chain of a multi-chain NCR may be different from a second uplink phase associated with a second RF chain of a multi-chain NCR. When the phase difference does not meet the phase coherence requirements of FDD / TDD MIMO operation, FDD / TDD MIMO operation may not be supported. In addition, when a phase jump occurs, the resulting phase difference may not meet the phase coherence requirements of FDD / TDD MIMO operation.

[0080] In various aspects of the techniques and devices described herein, a network node may receive an NCR capability report from an NCR indicating support for NCR forwarding beamforming and a certain number of NCR RF chains. The network node, NCR, and / or UE may facilitate phase control for the number of NCR RF chains supporting MIMO operations and / or phase calibration for the NCR based at least in part on the NCR capability report. In some aspects, in order to address phase differences that do not meet the phase coherence requirements of FDD / TDD MIMO operations, a mechanism may be defined to control the phase of each NCR RF chain so that the NCR may be able to support FDD / TDD MIMO operations. In addition, in order to address phase jumps that cause phase differences to not meet the phase coherence requirements of FDD / TDD MIMO operations, a mechanism may be defined to support phase calibration, which may be applied after the phase jump occurs. By controlling the phase and / or calibrating the phase, the performance of the network node, NCR, and / or UE may be improved.

[0081] Figure 6 6 is a diagram illustrating an example 600 associated with phase control and / or phase calibration for NCR according to the present disclosure. Figure 6 As shown, example 600 includes communications between a network node (e.g., network node 110), an NCR (e.g., NCR 122), and a UE (e.g., UE 120). In some aspects, the network node, NCR, and UE may be included in a wireless network (such as wireless network 100).

[0082] As shown by reference numeral 602, the network node may receive an NCR capability report from the NCR. The NCR capability report may indicate support for NCR forward beamforming, a certain number of NCR RF chains, whether uplink-downlink reciprocity is supported, a codebook size, and / or a phase shifting alphabet. In some aspects, the network node may send a network node configuration to the NCR. The network node configuration may indicate a semi-static per-chain on-off indication for CSI-RS or SRS transmission, a semi-static codepoint indication for codebook-based phase control, a dynamic codepoint indication for codebook-based phase control, and / or a dynamic per-panel phase value for chain-wise phase control.

[0083] As shown in reference numeral 604, the network node, NCR and / or UE may facilitate phase control for the number of NCR RF chains supporting MIMO operation and / or phase calibration for the NCR based at least in part on the NCR capability report. Phase control for the number of NCR RF chains and / or phase calibration for the NCR may be based at least in part on the network node configuration. Phase control may involve controlling the phase associated with each RF chain of the NCR so that there is phase coherence or phase consistency between different RF chains of the NCR. Phase coherence may be required because FDD / TDD MIMO operation may require phase coherence requirements. Phase calibration may involve calibrating the phase associated with one or more RF chains of the NCR so that signals associated with one or more RF chains of the NCR may be associated with the same phase (or a phase within a defined threshold of each other). Phase calibration may be required to meet phase coherence requirements. When a phase jump occurs (e.g., the phase changes sharply in a relatively short period of time), this may be due to a change in RF state, such as downlink-uplink switching, on-off operation, or forwarding gain control, and the phase may need to be calibrated. Phase calibration may be based at least in part on signal measurements, such as phase calibration reference signal measurements.

[0084] In some aspects, to facilitate phase control, the network node may receive an indication of a codebook size for a controllable phase from the NCR. The network node may perform a synchronization signal block (SSB) scan based at least in part on the indication of the codebook size for the controllable phase. An optimal controllable phase value related to a plurality of controllable phase values ​​may be based at least in part on the SSB scan. The network node may send a CSI-RS to the UE and via the NCR by setting the optimal controllable phase value based at least in part on the NCR. The NCR may relay the CSI-RS from the network node to the UE. The network node may receive a composite channel measurement, a rank indicator (RI), a precoding matrix indicator (PMI), and / or a CQI from the UE and based at least in part on the CSI-RS. The NCR may relay the composite channel measurement, RI, PMI, and / or CQI from the UE to the network node.

[0085] In some aspects, to facilitate phase control, the network node may perform initial access with the UE based at least in part on codebook-based SSB scanning. The network node may send multiple time-division multiplexed CSI-RS resources to the UE and via the NCR according to the NCR RF chain on-off configuration. The NCR may relay multiple time-division multiplexed CSI-RS resources from the network node to the UE. Each CSI-RS resource may be sent when one NCR RF chain in the number of NCR RF chains is on and the other NCR RF chains in the number of NCR RF chains are disconnected. The network node may receive an indication of the best controllable phase value, RI, PMI and / or CQI from the UE and at least in part based on multiple time-division multiplexed CSI-RS resources sent according to the NCR RF chain on-off configuration. The NCR may relay the best controllable phase value, RI, PMI and / or CQI from the UE to the network node. RI, PMI and / or CQI may be based at least in part on composite channel measurement. The composite channel measurement may be based at least in part on the UE channel estimate during the NCR RF chain on-off time.

[0086] In some aspects, to facilitate phase control, the network node may receive multiple time-division multiplexed SRS resources from the UE and via the NCR according to the NCR RF chain on-off configuration. The NCR may relay multiple time-division multiplexed SRS resources from the UE to the network node. Each SRS resource may be received when one NCR RF chain in the number of NCR RF chains is on and other NCR RF chains in the number of NCR RF chains are disconnected. The network node may determine the optimal controllable phase value and the precoding matrix based at least in part on the multiple time-division multiplexed SRS resources received according to the NCR RF chain on-off configuration. The precoding matrix may be based at least in part on a composite channel measurement. The composite channel measurement may be based at least in part on the network node channel estimation during the NCR RF chain on-off time.

[0087] In some aspects, to facilitate phase calibration, the network node may receive an indication of a minimum duration for phase calibration from the NCR. The network node may send a configuration of one or more gap periods for phase calibration to the NCR. One or more gap periods may be associated with a downlink-uplink switch, an on-off transition, or a gain control. During one or more gap periods for phase calibration, the NCR may not forward one or more signals. The network node may trigger the phase calibration duration based at least in part on phase coherence tracking or a request for a gap period for phase calibration received from the NCR. The requested gap period may indicate a gap period index. Phase calibration at the NCR may be based at least in part on an internal calibration signal at the NCR.

[0088] In some aspects, to facilitate phase calibration, the network node may receive an indication of a minimum duration for phase calibration from the NCR. The network node may send a configuration associated with a phase calibration reference signal to the NCR. The configuration may indicate the timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal. The network node may send a configuration for one or more gap periods for phase calibration to the NCR. During one or more gap periods for phase calibration, the NCR may not forward one or more signals. The network node may trigger a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR. The network node may send a phase calibration reference signal to the NCR based at least in part on a trigger. Phase calibration at the NCR may be based at least in part on measurement of the phase calibration reference signal.

[0089] In some aspects, in order to facilitate phase calibration, the network node may receive an indication of the minimum duration for phase calibration from the NCR. The network node may send a configuration associated with a phase calibration reference signal to the NCR. The configuration may indicate the timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal. The network node may send a configuration for one or more gap periods for phase calibration to the NCR. During one or more gap periods for phase calibration, the NCR may not forward one or more signals. The network node may trigger a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR. The phase calibration reference signal may be triggered to be received from the UE. Phase calibration at the NCR may be based at least in part on measurements of the phase calibration reference signal received from the UE.

[0090] In some aspects, to facilitate phase calibration, the network node may receive an indication of the number of NCR RF chains and the minimum duration for phase calibration from the NCR. The network node may send a configuration associated with a phase calibration reference signal to the NCR. The configuration may indicate the timing for the phase calibration reference signal, the number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal. The network node may send a configuration for one or more gap periods for phase calibration to the NCR. During one or more gap periods for phase calibration, the NCR may not forward one or more signals. The network node may trigger a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal received from the NCR for phase calibration. The network node may send a phase calibration reference signal to the UE and via the NCR according to the NCR RF chain on-off configuration. The NCR may relay the phase calibration reference signal from the network node to the UE. Each repetition of the phase calibration reference signal may be sent when one NCR RF chain in the number of NCR RF chains is turned on and other NCR RF chains in the number of NCR RF chains are turned off. The network node may receive a report indicating a phase change measurement associated with the phase calibration reference signal from the UE. The NCR may relay the report indicating the phase change measurement from the UE to the network node. The report may indicate phase change measurements for different repetitions of the phase calibration reference signal. The network node may send an indication of a phase value to be calibrated at the NCR to the NCR and based at least in part on the report. Phase calibration may be implemented at the NCR based at least in part on the indication received from the NCR.

[0091] As indicated above, Figure 6 are provided as examples. Other examples can be found in the Figure 6 The examples described are different.

[0092] In some aspects, a phase control process for phase coherent NCR may be defined. The phase control process may include a first process, a second process, and a third process.

[0093] In some aspects, the first process may be associated with an FDD downlink, phase coherent, and UE transparent method. In the first process, phase coherence may be maintained. For example, the uncontrollable phase value (φ 1 , ..., φ M ) can be constant. The uncontrollable phase can be determined by denoted by, where M indicates the number of RF chains in the NCR. Each RF chain may be equipped with a phase shifter to control the phase shift value (θ) per panel. 1 , ..., θ M Each RF chain can provide the same forwarding gain A. NCR can have a codebook {Θ 1, ..., Θ L} to control the controllable phase value. In other words, {Θ 1 , ..., Θ L} may refer to a codebook used for NCR phase control.

[0094] In some aspects, in a first process that may be based at least in part on codebook-based phase control, the NCR may report to the network node a capability (L) of a codebook size for a controllable phase (or controllable phase portion). The controllable phase may be determined by The network node may perform an SSB scan, which may be based at least in part on the capability of the codebook size reported by the NCR. The network node may determine the optimal controllable phase value based at least in part on the SSB scan. Further phase refinement can be performed using CSI-RS based measurement reports. The network node can set the NCR-Fwd in the NCR The UE may measure a composite channel which may be based at least in part on the CSI-RS. The UE may then report RI, PMI and / or CQI.

[0095] Figure 7 is a diagram illustrating an example 700 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0096] like Figure 7 As shown, the NCR may be located between the network node and the UE. The NCR may include an NCR-Fwd that may have multiple RF chains. The NCR may include a phase shift controller for each RF chain. Each gain may provide the same forwarding gain A. The NCR may have a codebook {Θ 1 ,...,Θ L} to control the controllable phase value. The received downlink signal at the UE can be given by y=H r (AΦ)Θ i Gx+n represents, where Φ indicates the uncontrollable phase, Θ i indicates a controllable phase, and x indicates a transmitted signal.

[0097] As indicated above, Figure 7 are provided as examples. Other examples can be found in the Figure 7 The examples described are different.

[0098] In some aspects, the second process may be associated with a FDD downlink, phase coherent, and UE-assisted method. In the second process, phase coherence may be maintained. For example, the uncontrollable phase value (φ 1 , ..., φ M ) can be constant. The uncontrollable phase can be determined by denoted by, where M indicates the number of RF chains in the NCR. Each RF chain may be equipped with a phase shifter to control the phase shift value (θ) per panel. 1 ,...,θ M ). Each RF chain can provide the same forwarding gain A.

[0099] In some aspects, in the second process, initial access may be based at least in part on a codebook-based SSB scan. For example, as part of the initial access, the NCR may report to the network node the capabilities of the codebook size for the controllable phase (or controllable phase portion). As part of the initial access, the network node may perform an SSB scan, which may be based at least in part on the capabilities of the codebook size reported by the NCR. The network node may send M time-division multiplexed CSI-RS resources to the UE and via the NCR, where the NCR may apply an NCR RF chain on-off scheme or an orthogonal cover code (OCC) watermark.

[0100] For example, when M is four, the network node may send the first CSI-RS resource when the first RF chain of the NCR is turned on and the second RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The network node may send a second CSI-RS resource when the second RF chain of the NCR is turned on and the first RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a third CSI-RS resource when the third RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a fourth CSI-RS resource when the fourth RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the third RF chain of the NCR are turned off. The UE may measure the estimated channel represented by Represents the estimated channel. Further, And H r =[h r,1 ... h r，M ]. Furthermore, h r，1 、h r，2 、h r，3 and h r，4 Can refer to H r The columns of the matrix, and g (1) , g (2) , g (3) and g (4) θ may refer to a row of the G matrix. The UE may calculate and / or report the best controllable phase value (θ ) taking into account the composite channel. 1 , ..., θ M) and RI, PMI and / or CQI. The UE can To calculate the composite channel. The downlink channel can be obtained by H r (AΦ)ΘG represents. In other words, based at least in part on the composite channel, the UE may calculate the best controllable phase value. The UE may report the best controllable phase value to the network node.

[0101] In some aspects, a network node may derive (θ 1 , ..., θ M ), which is based at least in part on MN t Port Coherent Joint Transmission (CJT) feedback, and after sending a MN with CJT configuration t The port CSI-RS resources occur later. To make it transparent to the UE, the MN t Port CJT pre-decoding matrix can have , where W indicates each TRP predecoder.

[0102] In some aspects, the UE may determine G c =[vec(h r,1 g (1) ), ..., vec(h r，M g (M) )], which may be based at least in part on different estimated channel on or off associated with different NCR RF chains. For example, the UE may determine G c =[vec(h r，1 g (1) ), ..., vec(h r，M g (M) )], which is based at least in part on and UE can calculate the direct channel h d =vec(H d ), which may be based at least in part on certain measurements. The UE may calculate This may be based at least in part on determining G c =[vec(h r，1 g (1) ), ..., vec(h r，M g (M) )] and h d =vec(Ⅱ d ). UE can To calculate the optimal controllable phase value This can maximize spectrum efficiency. To calculate and update the optimal phase shift This may be based at least in part on Input.

[0103] For example, when M is four, the network node may send the first CSI-RS resource when the first RF chain of the NCR is turned on and the second RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The network node may send a second CSI-RS resource when the second RF chain of the NCR is turned on and the first RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a third CSI-RS resource when the third RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a fourth CSI-RS resource when the fourth RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the third RF chain of the NCR are turned off. The UE may measure the estimated channel represented by Represents the estimated channel. Further, And IIr=[h r,1 ...h r，M ]. Furthermore, h r，1 、h r，2 、h r，3 and h r，4 Can refer to H r The columns of the matrix, and g (1) , g (2) , g (3) and g (4) θ may refer to a row of the G matrix. The UE may calculate and / or report the best controllable phase value (θ ) taking into account the composite channel. 1 , ..., θ M ) and RI, PMI and / or CQI. The UE can To calculate the composite channel. The downlink channel can be obtained by H r (AΦ)ΘG represents. In other words, based at least in part on the composite channel, the UE may calculate the best controllable phase value. The UE may report the best controllable phase value to the network node.

[0104] Figure 8 is a diagram illustrating an example 800 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0105] like Figure 8As shown, M time-division multiplexed CSI-RS resources may be sent according to the NCR RF chain on-off scheme. When M is four, the network node may send the first CSI-RS resource when the first RF chain of the NCR is on and the second RF chain, the third RF chain, and the fourth RF chain of the NCR are off. The UE may measure The network node may send a second CSI-RS resource when the second RF chain of the NCR is turned on and the first RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a third CSI-RS resource when the third RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the fourth RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The network node may send a fourth CSI-RS resource when the fourth RF chain of the NCR is turned on and the first RF chain, the second RF chain, and the third RF chain of the NCR are turned off. The UE may measure the estimated channel represented by The UE may calculate and / or report the best controllable phase value (θ ) taking into account the composite channel. 1 ,...,θ M ) and RI, PMI and / or CQI. In other words, based at least in part on the composite channel, the UE may calculate an optimal controllable phase value. The UE may report the optimal controllable phase value to the network node.

[0106] As indicated above, Figure 8 are provided as examples. Other examples can be found in the Figure 8 The examples described are different.

[0107] In some aspects, a third process may be associated with the uplink and phase coherence methods. In the third process, phase coherence may be maintained. For example, the uncontrollable phase value (φ 1 , ..., φ M ) can be constant. Each RF chain can be equipped with a phase shifter to control the phase shift value (θ) per panel 1 , ..., θ M ). Each RF chain can provide the same forwarding gain A.

[0108] In some aspects, in a third process, the UE may send M time-division multiplexed SRS resources to the network node and via the NCR, where the NCR may apply an NCR RF link on-off scheme or an OCC watermark.

[0109] For example, when M is four, the UE may send the first SRS resource when the first RF chain of the NCR is turned on and the second RF chain, the third RF chain, and the fourth RF chain of the NCR are turned off. The UE may send a second SRS resource when the second RF chain of the NCR is connected and the first RF chain, the third RF chain and the fourth RF chain of the NCR are disconnected. The network node may measure the estimated channel represented by The UE may send a third SRS resource when the third RF chain of the NCR is connected and the first RF chain, the second RF chain and the fourth RF chain of the NCR are disconnected. The network node may measure the estimated channel represented by The UE may send a fourth SRS resource when the fourth RF chain of the NCR is connected and the first RF chain, the second RF chain and the third RF chain of the NCR are disconnected. The network node may measure the estimated channel represented by The network node can determine the optimal controllable phase value (θ) taking into account the composite channel. 1 , ..., θ M ) and the downlink precoding matrix. The network node can to calculate the composite channel. In other words, based at least in part on the composite channel, the network node may calculate the optimal controllable phase value. The UE may report the optimal controllable phase value to the network node. When uplink / downlink reciprocity is maintained, the network node may use the estimated subchannel to determine the controllable phase value and the downlink precoding matrix.

[0110] Fig. 9 is a diagram illustrating an example 900 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0111] like Fig. 9 As shown, the NCR may be located between the network node and the UE. The NCR may include an NCR-Fwd that may have multiple RF chains. The NCR may include a phase shift controller for each RF chain. Each gain may provide the same forwarding gain A. The received uplink signal at the network node may be represented by y=(H r (AΦ)Θ i G) T x+n represents, where Φ indicates the uncontrollable phase, Θ i indicates a controllable phase, and x indicates a transmitted signal.

[0112] As indicated above, Fig. 9 are provided as examples. Other examples can be found in the Fig. 9 The examples described are different.

[0113] In some aspects, the NCR may be configured for NCR capability reporting. The NCR may report its capabilities to the network node and / or UE. The NCR capability report may indicate whether the NCR supports NCR-Fwd beamforming. When the NCR capability report on the number of beams supported for forwarding is equal to one, NCR-Fwd beamforming may not be supported. The NCR capability report may indicate whether the NCR supports uplink / downlink reciprocity. The NCR capability report may indicate the number of RF chains. The NCR capability report may indicate the codebook size (in the case of codebook-based phase control). The NCR capability report may indicate a phase shift alphabet, such as quadrature phase shift keying (QPSK), 8-phase shift keying (8PSK) or 16-phase shift keying (16PSK) (in the case of RF chain-by-chain phase control).

[0114] In some aspects, the network node may send a network node configuration or indication to the NCR and / or to the UE via the NCR. The network node may send a semi-static per-chain on-off indication (or OCC indication) for CSI-RS / SRS transmission. The semi-static per-chain on-off indication may indicate to the NCR which RF chain should be turned on and which RF chain should be turned off relative to certain CSI-RS / SRS transmissions. The network node may send a semi-static code point indication (in the case of codebook-based phase control), which may be the same as beam-based operation. The network node may send a dynamic code point indication (in the case of codebook-based phase control), which may be the same as beam-based operation. The network node may send a dynamic per-panel phase value (in the case of chain-by-chain phase control).

[0115] In some aspects, the UE may perform reporting. The UE may send a report to the network node. The UE may report the best controllable phase value (θ 1 ,...,θ M ). The UE may report RI, PMI and / or CQI while taking into account the composite channel.

[0116] In some aspects, NCR capability reporting, network node configuration / indication, and / or UE reporting may be applied to FR2 multi-panel NCRs for which inter-panel phase calibration is not performed.

[0117] In some aspects, a phase calibration scheme for a time-varying NCR phase can be defined.The NCR can perform phase calibration based at least in part on the first scheme, the second scheme, the third scheme, or the fourth scheme.

[0118] In some aspects, phase jumps may occur. Uncontrollable phase value (φ 1 (t), ..., φ M(t)) may vary with the phase jump due to the occurrence of an event. The phase jump may be caused by a change in RF state (such as downlink-uplink switching, on-off operation, or forwarding gain control). The NCR may be equipped with a phase calibrator, which may take a while to adjust the phase value back to a given state. The NCR may be a multi-chain NCR, and each RF chain can provide the same forwarding gain A.

[0119] Fig.10 is a diagram illustrating an example 1000 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0120] like Fig.10 As shown, the NCR may be located between the network node and the UE. The NCR may include an NCR-Fwd that may have multiple RF chains. The signal associated with the first RF chain of the NCR may be represented by Aexp(jφ1(t)). The signal associated with the Mth RF chain of the NCR may be represented by Aexp(jφ M (t)) indicates the uncontrollable phase value (φ 1 (t), ..., φ M (t)) may vary with the phase jump due to the occurrence of events. Each RF chain can provide the same forwarding gain A. The received signal associated with the network node or UE can be represented by y=H r Φ(t)Gx+n represents, where And φ m (t) = U (-θ, θ) + tΔ θ +U(-θ, θ)·δ(t), which may be equal to 1 when the event occurs.

[0121] As indicated above, Fig.10 are provided as examples. Other examples can be found in the Fig.10 The examples described are different.

[0122] In some aspects, for NCR phase calibration, in a first solution, the NCR may utilize its own transmit signals and measurements. The NCR may request a network node to guarantee a specific phase calibration gap. The NCR may transmit its own internal transmit signal and perform phase calibration. It may not be desirable for the NCR to receive (or transmit) any signal within the relevant gap. A second solution may involve network node assistance and NCR measurement and phase calibration. The network node may send a known signal for calibration and an indication of the calibration gap. The network node may send a known signal based at least in part on the NCR request. The NCR may measure phase changes and perform phase calibration based at least in part on the known signal. A third solution may involve UE assistance and NCR measurement and phase calibration. The network node may trigger the UE to send an uplink known signal. The network node may trigger the UE to send an uplink known signal based at least in part on the NCR request. The NCR may measure phase changes and perform phase calibration based at least in part on the uplink known signal. A fourth solution may involve network node and UE measurements and NCR calibration. Phase calibration reference signals may be sent periodically (or aperiodically) in uplink and downlink. The UE and the network node may measure the phase change and perform reporting of the phase change. For the downlink, the network node may send a phase calibration reference signal. For the uplink, the UE may send a phase calibration reference signal. The phase calibration reference signal may be sent in multiple time division multiplexing resources, where the number of resources may depend on the number of RF chains in the NCR.

[0123] In some aspects, the first scheme may involve NCR internal calibration. The NCR may report the minimum duration for phase calibration to the network node. The network node may configure different gap periods (in terms of symbols or time slots) for the NCR. Different gap periods may be different state change situations. For example, the first gap may be used after downlink-uplink switching, the second gap may be used after on-off conversion, and the third gap may be used after forwarding gain control. The network node may dynamically trigger the phase calibration duration when needed. Phase coherence tracking may be performed by the network node, which may involve comparing the CSI-RS report with the SRS measurement. When an event occurs or is triggered, the NCR may perform phase calibration. It may not be desirable for the NCR to forward any signal within the configured / triggered gap period. The NCR may send an internal calibration signal before the component causes a phase jump, and the NCR may receive a signal after the component, which may allow the NCR to measure the phase difference and perform phase calibration. The NCR may request a gap period for phase calibration (especially for forwarding gain control) with a gap period index from the network node. In response, the network node may confirm or trigger the gap period. After confirmation by the network node, the NCR may operate the phase calibration during the relevant gap period without forwarding any signal.

[0124] Fig.11is a diagram illustrating an example 1100 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0125] like Fig.11 As shown, the NCR may send an internal calibration signal. The NCR may measure a phase associated with the internal calibration signal, which may occur before the internal calibration signal is affected by a component (e.g., an amplifier) ​​in the NCR that causes a phase jump. The NCR may measure a phase associated with the internal calibration signal after the internal calibration signal is affected by a component in the NCR. Thus, the NCR may determine a phase difference, and the NCR may be able to perform phase calibration based at least in part on the phase difference.

[0126] As indicated above, Fig.11 are provided as examples. Other examples can be found in the Fig.11 The examples described are different.

[0127] In some aspects, the second scheme may involve network node assistance and NCR measurement and phase calibration. The NCR may report the minimum duration for phase calibration to the network node. The network node may configure timing (e.g., period and offset) and additional resource and sequence information for the phase calibration reference signal. The network node may configure the gap period for phase calibration. In some cases, multiple phase calibration reference signals may be configured, and different gap periods for different phase calibration reference signals may be configured. The network node may dynamically trigger the phase calibration reference signal and the associated phase calibration duration when needed. Phase coherence tracking may be performed by the network node, which may involve comparing the CSI-RS report with the SRS measurement. When the phase calibration reference signal is sent by the network node, the NCR may perform phase calibration using the phase calibration reference signal measurement. It may not be desirable for the NCR to forward any signal within the configured / triggered gap period. The phase calibration reference signal may be sent by the network node for network node-assisted phase calibration. The NCR may request a phase calibration reference signal for phase calibration (especially for forwarding gain control) from the network node. In response, the network node may confirm the phase calibration reference signal transmission and the associated gap period. After the network node acknowledges, the network node may send a phase calibration reference signal, and the NCR may operate the phase calibration without sending or receiving any signal during the relevant gap period.

[0128] In some aspects, the third scheme may involve UE-assisted and NCR measurements and phase calibration. The NCR may report the minimum duration for phase calibration to the network node. The network node may configure timing (e.g., period and offset) and additional resource and sequence information for the phase calibration reference signal. The network node may configure the gap period for phase calibration. In some cases, multiple phase calibration reference signals may be configured, and different gap periods for different phase calibration reference signals may be configured. The network node may dynamically trigger the phase calibration reference signal and the associated phase calibration duration when needed. Phase coherence tracking may be performed by the network node, which may involve comparing the CSI-RS report with the SRS measurement. When the phase calibration reference signal is sent by the UE, the NCR may perform phase calibration using the phase calibration reference signal measurement. It may not be desirable for the NCR to forward any signal within the configured / triggered gap period. The phase calibration reference signal may be sent by the UE for UE-assisted phase calibration. The NCR may request a phase calibration reference signal for phase calibration (especially for forwarding gain control) from the network node. In response, the network node may confirm the phase calibration reference signal transmission and the associated gap period. After confirmation by the network node, the UE may send a phase calibration reference signal and the NCR may operate the phase calibration without sending or receiving any signal during the relevant gap period.

[0129] Fig.12 is a diagram illustrating an example 1200 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0130] like Fig.12 As shown, the NCR may receive a phase calibration reference signal from a network node or a UE. The NCR may receive the phase calibration reference signal via multiple RF chains of the NCR. The NCR may perform measurements of the phase calibration signals received via multiple RF chains of the NCR. Based at least in part on the measurements, the NCR may perform phase calibration. The NCR may not forward any signal within the configured / triggered gap period.

[0131] As indicated above, Fig.12 are provided as examples. Other examples can be found in the Fig.12 The examples described are different.

[0132] In some aspects, the NCR may report a certain number of NCR RF chains and a minimum duration for phase calibration to the network node. The network node may configure timing (e.g., period and offset), number of repetitions (corresponding to a certain number of NCR RF chains), and additional resources and sequence information for the phase calibration reference signal. The network node may configure the gap period for phase calibration. In some cases, multiple phase calibration reference signals may be configured, and different gap periods for different phase calibration reference signals may be configured. The network node may dynamically trigger the phase calibration reference signal and the associated phase calibration duration when needed. Phase coherence tracking may be performed by the network node, which may involve comparing the CSI-RS report with the SRS measurement. A phase calibration reference signal may be sent. For the downlink, the network node may send a phase calibration reference signal. For the uplink, the UE may send a phase calibration reference signal. When sending the phase calibration reference signal, the NCR may perform a chain on-off operation for phase calibration reference signal measurement on the network node or UE side.

[0133] For example, when the NCR has four RF chains, during the first repetition of the phase calibration reference signal, the first RF chain of the NCR may be turned on, and the second, third, and fourth RF chains of the NCR may be turned off. During the second repetition of the phase calibration reference signal, the second RF chain of the NCR may be turned on, and the first, third, and fourth RF chains of the NCR may be turned off. During the third repetition of the phase calibration reference signal, the third RF chain of the NCR may be turned on, and the first, second, and fourth RF chains of the NCR may be turned off. During the fourth repetition of the phase calibration reference signal, the fourth RF chain of the NCR may be turned on, and the first, second, and third RF chains of the NCR may be turned off.

[0134] In some aspects, the UE or network node may measure a phase change, which may be based at least in part on a link pass operation for phase calibration reference signal measurement. The UE may report the NCR phase change value to the network node. The network node may indicate the phase value to be calibrated to the NCR. During phase calibration, it may not be desirable for the NCR to forward any signal within a configured gap period. The NCR may request a phase calibration reference signal for phase calibration (particularly for forwarding gain control) from the network node. In response, the network node may confirm the phase calibration reference signal transmission and the configured gap period.

[0135] Fig.13 is a diagram illustrating an example 1300 associated with phase control and / or phase calibration for NCR according to the present disclosure.

[0136] like Fig.13As shown, the NCR may receive a phase calibration reference signal from a network node or a UE. The NCR may receive the phase calibration reference signal via multiple RF chains of the NCR. The NCR may perform an RF chain on-off operation for phase calibration reference signal measurement on the network node or UE side. At a first time, the first RF chain of the NCR may be turned on and the second RF chain of the NCR may be turned off. The first RF chain may forward the phase calibration reference signal to the network node or the UE. At a second time, the first RF chain of the NCR may be turned off and the second RF chain of the NCR may be turned on. The second RF chain may forward the phase calibration reference signal to the network node or the UE. Phase changes associated with different phase calibration reference signals received at the network node or the UE may be measured.

[0137] As indicated above, Fig.13 are provided as examples. Other examples can be found in the Fig.13 The examples described are different.

[0138] Fig.14 is a diagram illustrating an example process 1400 performed, for example, by a network node in accordance with the present disclosure. The example process 1400 is an example of a network node (eg, network node 110) performing operations associated with phase control and / or phase calibration for NCRs.

[0139] like Fig.14 As shown, in some aspects, process 1400 may include receiving an NCR capability report from an NCR indicating support for NCR forward beamforming and a certain number of NCR RF chains (block 1410). For example, a network node (e.g., using Fig.16 The communication manager 150 and / or receiving component 1602 depicted in FIG. 1 may receive an NCR capability report from the NCR indicating support for NCR forward beamforming and a certain number of NCR RF chains, as described above.

[0140] like Fig.14 As further shown, in some aspects, process 1400 may include facilitating one or more of: phase control for the number of NCR RF chains supporting MIMO operation, or phase calibration for the NCR based at least in part on the NCR capability report (block 1420). Fig.16 The communication manager 150 and / or facilitation component 1608 depicted in FIG. 1 may facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operation, or phase calibration for the NCR, as described above.

[0141] Process 1400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0142] In a first aspect, process 1400 includes: receiving an indication of a codebook size for a controllable phase from an NCR; performing an SSB scan based at least in part on the indication of the codebook size for the controllable phase, wherein an optimal controllable phase value related to multiple controllable phase values ​​is based at least in part on the SSB scan; setting the optimal controllable phase value based at least in part on the NCR to send a CSI-RS to a UE and via the NCR; and receiving one or more of the following from the UE and based at least in part on the CSI-RS: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator.

[0143] In a second aspect, alone or in combination with the first aspect, process 1400 includes: performing initial access with the UE based at least in part on codebook-based SSB scanning; sending multiple time-division multiplexed CSI-RS resources to the UE and via the NCR according to the NCR RF chain on-off configuration, wherein each CSI-RS resource is sent when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off; and receiving an indication of one or more of the following from the UE and at least in part based on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF chain on-off configuration: an optimal controllable phase value, RI, PMI or CQI, wherein one or more of the RI, PMI or CQI is based at least in part on a composite channel measurement, and the composite channel measurement is based at least in part on the UE channel estimation during the NCR RF chain on-off time.

[0144] In a third aspect, alone or in combination with one or more of the first and second aspects, process 1400 includes: receiving multiple time-division multiplexed SRS resources from the UE and via the NCR according to the NCR RF chain on-off configuration, wherein each SRS resource is received when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off; and determining an optimal controllable phase value and a precoding matrix based at least in part on the multiple time-division multiplexed SRS resources received according to the NCR RF chain on-off configuration, wherein the precoding matrix is ​​at least in part based on a composite channel measurement, and the composite channel measurement is at least in part based on a network node channel estimate during the NCR RF chain on-off time.

[0145] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the NCR capability report indicates whether uplink-downlink reciprocity, codebook size, and phase shift alphabet are supported.

[0146] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 1400 includes: sending a network node configuration to the NCR, the network node configuration indicating one or more of the following: a semi-static per-chain on-off indication for CSI-RS or SRS transmission, a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCR RF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

[0147] In a sixth aspect, either alone or in combination with one or more of aspects 1 to 5, process 1400 comprises: receiving an indication of a minimum duration for phase calibration from an NCR; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more gap periods are associated with downlink-uplink switching, on-off transitions, or gain control, and one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; and triggering a phase calibration duration based at least in part on phase coherence tracking or a request for a gap period for phase calibration received from the NCR, wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

[0148] In a seventh aspect, either alone or in combination with one or more of aspects 1 to 6, process 1400 comprises: receiving an indication of a minimum duration for phase calibration from an NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration for one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR; and sending a phase calibration reference signal to the NCR based at least in part on the trigger, wherein the phase calibration at the NCR is based at least in part on measurement of the phase calibration reference signal.

[0149] In an eighth aspect, either alone or in combination with one or more of aspects 1 to 7, process 1400 comprises: receiving an indication of a minimum duration for phase calibration from an NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration for one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; and triggering a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR, wherein the phase calibration reference signal is triggered to be received from a UE, wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal received from the UE.

[0150] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, process 1400 includes: receiving an indication of the number of NCR RF chains and a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration for one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering a phase calibration reference signal and a phase calibration duration based at least in part on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR; sending a phase calibration reference signal to the UE and via the NCR according to the NCR RF chain on / off configuration, wherein each repetition of the phase calibration reference signal is when one NCR RF chain in the number of NCR RF chains is on and the other NCRs in the number of NCR RF chains are on. sent when the RF chain is disconnected; receiving a report from the UE indicating a phase change measurement associated with a phase calibration reference signal, wherein the report indicates phase change measurements for different repetitions of the phase calibration reference signal; and sending an indication of a phase value to be calibrated at the NCR to the NCR and at least partially based on the report, wherein the phase calibration is implemented at the NCR at least partially based on the indication received from the NCR.

[0151] although Fig.14 Example blocks of process 1400 are shown, but in some aspects, process 1400 may include Fig.14In some embodiments, the process 1400 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 1400. Additionally or alternatively, two or more blocks of the blocks of the process 1400 may be performed in parallel.

[0152] Fig.15 is a diagram illustrating an example process 1500 performed, for example, by an NCR in accordance with the present disclosure. The example process 1500 is an example of an NCR (eg, NCR 122) performing operations associated with phase control and / or phase calibration for the NCR.

[0153] like Fig.15 As shown, in some aspects, process 1500 may include sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forward beamforming and a certain number of NCR RF chains (block 1510). For example, an NCR (e.g., using Fig.17 The communication manager 140 and / or the sending component 1704 depicted in FIG. 140 may send an NCR capability report to the network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains, as described above.

[0154] like Fig.15 As further shown, in some aspects, process 1500 may include facilitating one or more of: phase control for the number of NCR RF chains supporting MIMO operation, or phase calibration for the NCR based at least in part on the NCR capability report (block 1520). For example, the NCR (e.g., using Fig.17 The communication manager 140 and / or facilitation component 1708 depicted in FIG. 1 may facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operation, or phase calibration for the NCR, as described above.

[0155] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0156] In a first aspect, process 1500 includes: sending an indication of a codebook size for a controllable phase to a network node, wherein an SSB scan is performed at least in part based on the indication of the codebook size for the controllable phase, and an optimal controllable phase value related to multiple controllable phase values ​​is based at least in part on the SSB scan; relaying a CSI-RS from the network node to a UE based at least in part on setting the optimal controllable phase value; and relaying one or more of a composite channel measurement, RI, PMI, or CQI from the UE to the network node.

[0157] In a second aspect, alone or in combination with the first aspect, process 1500 includes: relaying multiple time-division multiplexed CSI-RS resources from a network node to a UE according to an NCR RF chain on-off configuration, wherein each CSI-RS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off; and relaying an indication of one or more of the following from the UE to the network node based at least in part on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF chain on-off configuration: an optimal controllable phase value, RI, PMI or CQI, wherein one or more of the RI, PMI or CQI is based at least in part on a composite channel measurement, and the composite channel measurement is based at least in part on a UE channel estimate during the NCR RF chain on-off time.

[0158] In a third aspect, alone or in combination with one or more of the first and second aspects, process 1500 includes: relaying multiple time-division multiplexed SRS resources from a UE to a network node based on an NCR RF chain on-off configuration, wherein each SRS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCRRF chains among the number of NCR RF chains are off, wherein an optimal controllable phase value and a precoding matrix are at least partially based on the multiple time-division multiplexed SRS resources, wherein the precoding matrix is ​​at least partially based on a composite channel measurement, and the composite channel measurement is at least partially based on a network node channel estimate during the NCR RF chain on-off time.

[0159] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the NCR capability report indicates whether uplink-downlink reciprocity, codebook size, and phase shift alphabet are supported.

[0160] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 1500 includes: receiving a network node configuration from a network node, the network node configuration indicating one or more of the following: a semi-static per-chain on-off indication for CSI-RS or SRS transmission, a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCR RF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

[0161] In a sixth aspect, either alone or in combination with one or more of aspects 1 to 5, process 1500 comprises: sending an indication of a minimum duration for phase calibration to a network node; and receiving a configuration of one or more gap periods for phase calibration from the network node, wherein the one or more gap periods are associated with downlink-uplink switching, on-off transitions, or gain control, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration duration is triggered at least in part based on phase coherence tracking or a request from the NCR for a gap period for phase calibration, and wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

[0162] In a seventh aspect, either alone or in combination with one or more of aspects 1 to 6, process 1500 comprises: sending an indication of a minimum duration for phase calibration to a network node; and receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; receiving a configuration for one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request for a phase calibration reference signal for phase calibration from the NCR; and receiving a phase calibration reference signal from the network node based at least in part on the phase calibration reference signal and the phase calibration duration being triggered, wherein the phase calibration at the NCR is based at least in part on measurement of the phase calibration reference signal.

[0163] In an eighth aspect, either alone or in combination with one or more of aspects 1 to 7, process 1500 comprises: sending an indication of a minimum duration for phase calibration to a network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; and receiving a configuration for one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request from the NCR for a phase calibration reference signal for phase calibration, wherein the phase calibration reference signal is triggered to be received from a UE, wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal received from the UE.

[0164] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, process 1500 includes: sending an indication of the number of NCR RF chains and a minimum duration for phase calibration to a network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; receiving a configuration for one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request for a phase calibration reference signal for phase calibration received from the NCR; relaying the phase calibration reference signal from the network node to the UE according to the NCR RF chain on / off configuration, wherein each repetition of the phase calibration reference signal is when one NCR RF chain in the number of NCR RF chains is on and the other NCRs in the number of NCR RF chains are on. The invention relates to a method for transmitting a phase change measurement associated with a phase calibration reference signal from a UE to a network node in the event of an RF chain disconnection; relaying a report indicating a phase change measurement associated with a phase calibration reference signal from the UE to a network node, wherein the report indicates phase change measurements for different repetitions of the phase calibration reference signal; and receiving an indication of a phase value to be calibrated at an NCR from the network node and based at least in part on the report, wherein the phase calibration is implemented at the NCR based at least in part on the indication received from the NCR.

[0165] although Fig.15 Example blocks of process 1500 are shown, but in some aspects, process 1500 may include Fig.15 The blocks in the process 1500 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 1500. Additionally or alternatively, two or more blocks in the blocks of the process 1500 may be performed in parallel.

[0166] Fig.16 1 is a diagram of an example apparatus 1600 for wireless communication according to the present disclosure. Apparatus 1600 may be a network node, or a network node may include apparatus 1600. In some aspects, apparatus 1600 includes a receiving component 1602 and a sending component 1604 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1600 may communicate with another apparatus 1606 (such as a UE, a base station, or another wireless communication device) using receiving component 1602 and sending component 1604. As further shown, apparatus 1600 may include a communication manager 150. Communication manager 150 may include facilitation component 1608, etc.

[0167] In some aspects, the apparatus 1600 may be configured to perform the Figures 6 to 13 Additionally or alternatively, the apparatus 1600 may be configured to perform one or more processes described herein, such as Fig.14 The process 1400. In some aspects, Fig.16 The device 1600 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Fig.16 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the set of components 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 code 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.

[0168] The receiving component 1602 may receive communications from the device 1606, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1602 may provide the received communications to one or more other components of the device 1600. In some aspects, the receiving component 1602 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 1600. In some aspects, the receiving component 1602 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.

[0169] Transmit component 1604 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1606. In some aspects, one or more other components of device 1600 may generate communications and may provide the generated communications to transmit component 1604 for transmission to device 1606. In some aspects, transmit component 1604 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 device 1606. In some aspects, transmit component 1604 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 1604 can be co-located with the receive component 1602 in a transceiver.

[0170] Receiving component 1602 can receive an NCR capability report from the NCR indicating support for NCR forward beamforming and a certain number of NCR RF chains. Facilitating component 1608 can facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operations, or phase calibration for the NCR.

[0171] Fig.16 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.16 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.16 Two or more components shown may be implemented in a single component, or Fig.16 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.16 The component set (one or more components) shown may be described as being executable by Fig.16 Another component shown may be a collection of components that perform one or more functions.

[0172] Fig.17 1 is a diagram of an example apparatus 1700 for wireless communication according to the present disclosure. Apparatus 1700 may be an NCR, or an NCR may include apparatus 1700. In some aspects, apparatus 1700 includes a receiving component 1702 and a transmitting component 1704 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1700 may communicate with another apparatus 1706 (such as a UE, a base station, or another wireless communication device) using receiving component 1702 and transmitting component 1704. As further shown, apparatus 1700 may include a communication manager 140. Communication manager 140 may include facilitation component 1708, among other things.

[0173] In some aspects, the apparatus 1700 may be configured to perform the Figures 6 to 13 Additionally or alternatively, the apparatus 1700 may be configured to perform one or more processes described herein, such as Fig.15 The process 1500. In some aspects, Fig.17 The device 1700 and / or one or more components shown may include a combination of Figure 2 Additionally or alternatively, Fig.17 One or more of the components shown may be combined with Figure 2Additionally or alternatively, one or more components in the set of components 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 code 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.

[0174] The receiving component 1702 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1706. The receiving component 1702 may provide the received communications to one or more other components of the device 1700. In some aspects, the receiving component 1702 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 1700. In some aspects, the receiving component 1702 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described NCRs.

[0175] The transmitting component 1704 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1706. In some aspects, one or more other components of the device 1700 may generate communications and may provide the generated communications to the transmitting component 1704 for transmission to the device 1706. In some aspects, the transmitting component 1704 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 1706. In some aspects, the transmitting component 1704 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 NCR. In some aspects, the transmit component 1704 can be co-located with the receive component 1702 in a transceiver.

[0176] The transmitting component 1704 can transmit an NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR RF chains to the network node. The facilitating component 1708 can facilitate one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting MIMO operation, or phase calibration for the NCR.

[0177] Fig.17 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.17Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.17 Two or more components shown may be implemented in a single component, or Fig.17 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.17 The component set (one or more components) shown may be described as being executable by Fig.17 Another component shown may be a collection of components that perform one or more functions.

[0178] The following provides an overview of some aspects of the disclosure:

[0179] Aspect 1: A method of wireless communication performed by a network node, the method comprising: receiving a network controlled repeater (NCR) capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR radio frequency (RF) chains; and facilitating one or more of the following based at least in part on the NCR capability report: phase control of the number of NCR RF chains supporting multiple-input multiple-output (MIMO) operations, or phase calibration of the NCR.

[0180] Aspect 2: A method according to Aspect 1, wherein facilitating the phase control further comprises: receiving an indication of a codebook size for a controllable phase from the NCR; performing a synchronization signal block (SSB) scan based at least in part on the indication of the codebook size for the controllable phase, wherein an optimal controllable phase value related to a plurality of controllable phase values ​​is based at least in part on the SSB scan; sending a channel state information reference signal (CSI-RS) to a user equipment (UE) and via the NCR by setting the optimal controllable phase value based at least in part on the NCR; and receiving one or more of the following from the UE and based at least in part on the CSI-RS: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator.

[0181] Aspect 3: A method according to any one of Aspects 1 to 2, wherein facilitating the phase control further comprises: performing initial access with a user equipment (UE) at least in part based on a codebook-based synchronization signal block (SSB) scan; sending a plurality of time-division multiplexed channel state information reference signal (CSI-RS) resources to the UE and via the NCR according to an NCRRF chain on-off configuration, wherein each CSI-RS resource is sent when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; and receiving an indication of one or more of the following from the UE and at least in part based on the plurality of time-division multiplexed CSI-RS resources sent according to the NCR RF chain on-off configuration: an optimal controllable phase value, a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI), wherein one or more of the RI, the PMI, or the CQI is based at least in part on a composite channel measurement, and wherein the composite channel measurement is based at least in part on the NCR UE channel estimation during RF chain on-off time.

[0182] Aspect 4: A method according to any one of Aspects 1 to 3, wherein facilitating the phase control further includes: receiving multiple time-division multiplexed sounding reference signal (SRS) resources from a user equipment (UE) and via the NCR according to an NCR RF chain on-off configuration, wherein each SRS resource is received when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; and determining an optimal controllable phase value and a precoding matrix based at least in part on the multiple time-division multiplexed SRS resources received according to the NCR RF chain on-off configuration, wherein the precoding matrix is ​​at least in part based on a composite channel measurement, and wherein the composite channel measurement is at least in part based on a network node channel estimate during the NCR RF chain on-off time.

[0183] Aspect 5: The method according to any one of aspects 1 to 4, wherein the NCR capability report indicates whether uplink-downlink reciprocity, codebook size and phase shift alphabet are supported.

[0184] Aspect 6: According to the method described in any one of Aspects 1 to 5, the method further includes: sending a network node configuration to the NCR, the network node configuration indicating one or more of the following: a semi-static per-chain on-off indication for sending a channel state information reference signal (CSI-RS) or a sounding reference signal (SRS), a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCR RF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

[0185] Aspect 7: A method according to any one of Aspects 1 to 6, wherein facilitating the phase calibration further includes: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein the one or more gap periods are associated with downlink-uplink switching, on-off switching, or gain control, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; and triggering the phase calibration duration based at least in part on phase coherence tracking or a request for a gap period for phase calibration received from the NCR, wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

[0186] Aspect 8: A method according to any one of Aspects 1 to 7, wherein facilitating the phase calibration further includes: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration for one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and the phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal for phase calibration received from the NCR; and sending the phase calibration reference signal to the NCR based at least in part on the trigger, wherein the phase calibration at the NCR is based at least in part on measurement of the phase calibration reference signal.

[0187] Aspect 9: A method according to any one of Aspects 1 to 8, wherein facilitating the phase calibration further includes: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration for one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; and triggering the phase calibration reference signal and the phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal for phase calibration received from the NCR, wherein the phase calibration reference signal is triggered to be received from a user equipment (UE), and wherein the phase calibration at the NCR is based at least in part on measurements of the phase calibration reference signal received from the UE.

[0188] Aspect 10: A method according to any one of Aspects 1 to 9, wherein facilitating the phase calibration further comprises: receiving an indication of the number of NCR RF chains and a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates a timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and the phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal for phase calibration received from the NCR; sending the phase calibration reference signal to a user equipment (UE) and via the NCR according to an NCR RF chain on / off configuration, wherein each repetition of the phase calibration reference signal is when one of the number of NCR RF chains is on and the number of NCRs is on. The method comprises the steps of: sending a phase change measurement associated with the phase calibration reference signal to the UE when other NCRs in the RF chain are disconnected; receiving a report indicating a phase change measurement associated with the phase calibration reference signal from the UE, wherein the report indicates the phase change measurement for different repetitions of the phase calibration reference signal; and sending an indication of a phase value to be calibrated at the NCR to the NCR and at least partially based on the report, wherein the phase calibration is implemented at the NCR at least partially based on the indication received from the NCR.

[0189] Aspect 11: A method for wireless communication performed by a network controlled repeater (NCR), the method comprising: sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR radio frequency (RF) chains; and facilitating one or more of the following based at least in part on the NCR capability report: phase control for the number of NCR RF chains supporting multiple-input multiple-output (MIMO) operations, or phase calibration for the NCR.

[0190] Aspect 12: A method according to aspect 11, wherein facilitating the phase control further includes: sending an indication of a codebook size for a controllable phase to the network node, wherein a synchronization signal block (SSB) scan is at least partially based on the indication of the codebook size for the controllable phase, and wherein an optimal controllable phase value related to multiple controllable phase values ​​is at least partially based on the SSB scan; relaying a channel state information reference signal (CSI-RS) from the network node to a user equipment (UE) based at least in part on setting the optimal controllable phase value; and relaying one or more of the following from the UE to the network node: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator.

[0191] Aspect 13: A method according to any one of Aspects 11 to 12, wherein facilitating the phase control further includes: relaying multiple time-division multiplexed channel state information reference signal (CSI-RS) resources from the network node to a user equipment (UE) according to an NCR RF chain on-off configuration, wherein each CSI-RS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off; and relaying an indication of one or more of the following from the UE to the network node at least in part based on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF chain on-off configuration: an optimal controllable phase value, a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI), wherein one or more of the RI, the PMI, or the CQI is at least in part based on a composite channel measurement, and wherein the composite channel measurement is at least in part based on UE channel estimation during the NCR RF chain on-off time.

[0192] Aspect 14: A method according to any one of Aspects 11 to 13, wherein facilitating the phase control further includes: relaying multiple time-division multiplexed sounding reference signal (SRS) resources from a user equipment (UE) to the network node according to an NCR RF chain on-off configuration, wherein each SRS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off, wherein an optimal controllable phase value and a precoding matrix are at least partially based on the multiple time-division multiplexed SRS resources, wherein the precoding matrix is ​​at least partially based on a composite channel measurement, and wherein the composite channel measurement is at least partially based on a network node channel estimate during the NCR RF chain on-off time.

[0193] Aspect 15: The method according to any one of aspects 11 to 14, wherein the NCR capability report indicates whether uplink-downlink reciprocity, codebook size and phase shift alphabet are supported.

[0194] Aspect 16: According to the method described in any one of Aspects 11 to 15, the method further includes: receiving a network node configuration from the network node, the network node configuration indicating one or more of the following: a semi-static per-chain on-off indication for sending a channel state information reference signal (CSI-RS) or a sounding reference signal (SRS), a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCR RF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

[0195] Aspect 17: A method according to any one of Aspects 11 to 16, wherein facilitating the phase calibration further includes: sending an indication of a minimum duration for phase calibration to the network node; and receiving a configuration of one or more gap periods for phase calibration from the network node, wherein the one or more gap periods are associated with downlink-uplink switching, on-off switching, or gain control, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration duration is triggered at least in part based on phase coherence tracking or a request for a gap period for phase calibration from the NCR, and wherein the phase calibration at the NCR is at least in part based on an internal calibration signal at the NCR.

[0196] Aspect 18: A method according to any one of Aspects 11 to 17, wherein facilitating the phase calibration further includes: sending an indication of a minimum duration for phase calibration to the network node; and receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; receiving a configuration for one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request for the phase calibration reference signal from the NCR for phase calibration; and receiving the phase calibration reference signal from the network node at least in part based on the phase calibration reference signal and the phase calibration duration being triggered, wherein the phase calibration at the NCR is at least in part based on measurement of the phase calibration reference signal.

[0197] Aspect 19: A method according to any one of Aspects 11 to 18, wherein facilitating the phase calibration further includes: sending an indication of a minimum duration for phase calibration to the network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; and receiving a configuration for one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request from the NCR for the phase calibration reference signal for phase calibration, wherein the phase calibration reference signal is triggered to be received from a user equipment (UE), and wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal received from the UE.

[0198] Aspect 20: A method according to any one of Aspects 11 to 19, wherein facilitating the phase calibration further comprises: sending an indication of the number of NCR RF chains and a minimum duration for phase calibration to the network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates a timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; receiving a configuration of one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request from the NCR for the phase calibration reference signal for phase calibration; relaying the phase calibration reference signal from the network node to a user equipment (UE) according to an NCR RF chain on / off configuration, wherein each repetition of the phase calibration reference signal is when one NCR RF chain in the number of NCR RF chains is on and the other NCRs in the number of NCR RF chains are on. The invention relates to a method for transmitting a phase change measurement associated with the phase calibration reference signal from the UE to the network node in the event of an RF chain disconnection; relaying a report indicating a phase change measurement associated with the phase calibration reference signal from the UE to the network node, wherein the report indicates the phase change measurement for different repetitions of the phase calibration reference signal; and receiving an indication of a phase value to be calibrated at the NCR from the network node and at least partially based on the report, wherein the phase calibration is implemented at the NCR at least partially based on the indication received from the NCR.

[0199] 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 a method according to one or more of Aspects 1 to 10.

[0200] Aspect 22: A device for wireless communication, the device comprising a memory and one or more processors, the one or more processors being coupled to the memory, the one or more processors being configured to execute the method according to one or more of aspects 1 to 10.

[0201] 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 1 to 10.

[0202] 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 1 to 10.

[0203] Aspect 25: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions, which, when executed by one or more processors of a device, causes the device to perform a method according to one or more of aspects 1 to 10.

[0204] Aspect 26: 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 a method according to one or more of Aspects 11 to 20.

[0205] Aspect 27: A device for wireless communication, the device comprising a memory and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 11 to 20.

[0206] Aspect 28: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 11 to 20.

[0207] Aspect 29: 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 11 to 20.

[0208] Aspect 30: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions, which, when executed by one or more processors of a device, causes the device to perform a method according to one or more of aspects 11 to 20.

[0209] 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 above disclosure or may be acquired from practice of the various aspects.

[0210] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of 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, execution threads, processes and / or functions, etc. As used herein, "processor" is implemented by hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented by different forms of hardware and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Therefore, the operation and behavior of the systems and / or methods are not described herein with reference to specific software codes, because it will be understood by those skilled in the art that software and hardware can be designed to implement the systems and / or methods based at least in part on the description herein.

[0211] 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.

[0212] Although the specific combination of features is stated 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 stated 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 sorting of a, b and c).

[0213] Any element, action or instruction used herein should not be interpreted as key 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 "said 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. In addition, as used herein, the terms "have", "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "an element with" A may 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 expressly stated otherwise (eg, if used in conjunction with "either" or "only one of").

Claims

1. A device for wireless communication at a network node, the device include: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receiving a network controlled repeater (NCR) capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a number of NCR radio frequency (RF) chains; and Based at least in part on the NCR capability report, one or more of: phase control for the number of NCR RF chains supporting multiple-input multiple-output (MIMO) operations, or phase calibration for the NCR is facilitated.

2. The apparatus of claim 1 , wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving an indication of a codebook size for a steerable phase from the NCR; performing a synchronization signal block (SSB) scan based at least in part on the indication of the codebook size for the controllable phase, wherein an optimal controllable phase value relative to a plurality of controllable phase values ​​is based at least in part on the SSB scan; sending a channel state information reference signal (CSI-RS) to a user equipment (UE) and via the NCR by setting the optimal controllable phase value based at least in part on the NCR; and One or more of: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator is received from the UE and based at least in part on the CSI-RS.

3. The apparatus of claim 1 , wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: performing initial access with a user equipment (UE) based at least in part on codebook-based synchronization signal block (SSB) scanning; Sending a plurality of time-division multiplexed channel state information reference signal (CSI-RS) resources to the UE and via the NCR according to the NCR RF chain on-off configuration, wherein each CSI-RS resource is sent when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; and An indication of one or more of: an optimal controllable phase value, a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI) is received from the UE and based at least in part on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF link on-off configuration, wherein one or more of the RI, the PMI, or the CQI is based at least in part on a composite channel measurement, and wherein the composite channel measurement is based at least in part on a UE channel estimate during the NCR RF link on-off time.

4. The apparatus of claim 1 , wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving a plurality of time-division multiplexed sounding reference signal (SRS) resources from a user equipment (UE) and via the NCR according to an NCR RF chain on-off configuration, wherein each SRS resource is received when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; and Determining an optimal controllable phase value and a precoding matrix based at least in part on the plurality of time-division multiplexed SRS resources received according to the NCR RF link on-off configuration, wherein the precoding matrix is ​​based at least in part on a composite channel measurement, and wherein the composite channel measurement is based at least in part on a network node channel estimate during the NCR RF link on-off time.

5. The apparatus of claim 1, wherein the NCR capability report indicates whether uplink-downlink reciprocity, codebook size, and phase shift alphabet are supported.

6. The apparatus of claim 1 , wherein the instructions stored in the memory and executable by the processor further cause the apparatus to: A network node configuration is sent to the NCR, wherein the network node configuration indicates one or more of the following: a semi-static per-chain on-off indication for channel state information reference signal (CSI-RS) or sounding reference signal (SRS) transmission, a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCRRF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

7. The apparatus of claim 1 , wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein the one or more gap periods are associated with downlink-uplink switching, on-off switching, or gain control, and wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; as well as A phase calibration duration is triggered based at least in part on phase coherence tracking or a request received from the NCR for a gap period for phase calibration, wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

8. The apparatus of claim 1 , wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal received from the NCR for phase calibration; as well as The phase calibration reference signal is sent to the NCR based at least in part on the trigger, wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal.

9. The apparatus of claim 1 , wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; as well as The phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request for the phase calibration reference signal for phase calibration received from the NCR, wherein the phase calibration reference signal is triggered to be received from a user equipment (UE), and wherein the phase calibration at the NCR is at least in part based on a measurement of the phase calibration reference signal received from the UE.

10. The apparatus of claim 1, wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: receiving from the NCR an indication of the number of NCR RF chains and a minimum duration for phase calibration; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal received from the NCR for phase calibration; transmitting the phase calibration reference signal to a user equipment (UE) and via the NCR according to an NCR RF chain on-off configuration, wherein each repetition of the phase calibration reference signal is transmitted when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; receiving, from the UE, a report indicating a phase variation measurement associated with the phase calibration reference signal, wherein the report indicates the phase variation measurement for different repetitions of the phase calibration reference signal; as well as An indication of a phase value to be calibrated at the NCR is sent to the NCR and based at least in part on the report, wherein the phase calibration is implemented at the NCR based at least in part on the indication received from the NCR.

11. An apparatus for wireless communication at a network controlled repeater (NCR), the apparatus include: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forward beamforming and a certain number of NCR radio frequency (RF) chains; and Based at least in part on the NCR capability report, one or more of: phase control for the number of NCR RF chains supporting multiple-input multiple-output (MIMO) operations, or phase calibration for the NCR is facilitated.

12. The apparatus of claim 11, wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: sending an indication of a codebook size for a controllable phase to the network node, wherein a synchronization signal block (SSB) scan is based at least in part on the indication of the codebook size for the controllable phase, and wherein a best controllable phase value relative to a plurality of controllable phase values ​​is based at least in part on the SSB scan; relaying a channel state information reference signal (CSI-RS) from the network node to a user equipment (UE) based at least in part on setting the optimal controllable phase value; and One or more of the following is relayed from the UE to the network node: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator.

13. The apparatus of claim 11, wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: relaying a plurality of time-division multiplexed channel state information reference signal (CSI-RS) resources from the network node to a user equipment (UE) according to an NCR RF chain on-off configuration, wherein each CSI-RS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off; and At least in part based on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF link on-off configuration, an indication of one or more of the following is relayed from the UE to the network node: an optimal controllable phase value, a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI), wherein one or more of the RI, the PMI, or the CQI is at least in part based on a composite channel measurement, and wherein the composite channel measurement is at least in part based on UE channel estimation during the NCR RF link on-off time.

14. The apparatus of claim 11, wherein to facilitate the phase control, the instructions stored in the memory and executable by the processor further cause the apparatus to: A plurality of time-division multiplexed sounding reference signal (SRS) resources are relayed from a user equipment (UE) to the network node according to an NCR RF chain on-off configuration, wherein each SRS resource is communicated when one NCR RF chain among the number of NCR RF chains is on and other NCR RF chains among the number of NCR RF chains are off, wherein an optimal controllable phase value and a precoding matrix are at least partially based on the plurality of time-division multiplexed SRS resources, wherein the precoding matrix is ​​at least partially based on a composite channel measurement, and wherein the composite channel measurement is at least partially based on a network node channel estimate during the NCR RF chain on-off time.

15. The apparatus of claim 11, wherein the NCR capability report indicates whether uplink-downlink reciprocity, codebook size, and phase shift alphabet are supported.

16. The apparatus of claim 11, wherein the instructions stored in the memory and executable by the processor further cause the apparatus to: A network node configuration is received from the network node, the network node configuration indicating one or more of the following: a semi-static per-chain on-off indication for channel state information reference signal (CSI-RS) or sounding reference signal (SRS) transmission, a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NCR RF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

17. The apparatus of claim 11, wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: sending an indication of a minimum duration for phase calibration to the network node; and Receiving a configuration of one or more gap periods for phase calibration from the network node, wherein the one or more gap periods are associated with downlink-uplink switching, on-off switching, or gain control, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein a phase calibration duration is triggered at least in part based on phase coherence tracking or a request for a gap period for phase calibration from the NCR, and wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

18. The apparatus of claim 11, wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: sending an indication of a minimum duration for phase calibration to the network node; and receiving, from the network node, a configuration associated with a phase calibration reference signal, wherein the configuration indicates timing for the phase calibration reference signal and additional resource and sequence information associated with the phase calibration reference signal; receiving, from the network node, a configuration of one or more gap periods for phase calibration, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and phase calibration duration are triggered based at least in part on phase coherence tracking or a request from the NCR for the phase calibration reference signal for phase calibration; as well as The phase calibration reference signal is received from the network node based at least in part on being triggered based on the phase calibration reference signal and the phase calibration duration, wherein the phase calibration at the NCR is based at least in part on measurement of the phase calibration reference signal.

19. The apparatus of claim 11, wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: sending an indication of a minimum duration for phase calibration to the network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal and additional resource and sequence information associated with the phase calibration reference signal; and Receiving a configuration of one or more gap periods for phase calibration from the network node, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and phase calibration duration are triggered at least in part based on phase coherence tracking or a request from the NCR for the phase calibration reference signal for phase calibration, wherein the phase calibration reference signal is triggered to be received from a user equipment (UE), and wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal received from the UE.

20. The apparatus of claim 11, wherein to facilitate the phase calibration, the instructions stored in the memory and executable by the processor further cause the apparatus to: sending an indication of the number of NCR RF chains and a minimum duration for phase calibration to the network node; receiving a configuration associated with a phase calibration reference signal from the network node, wherein the configuration indicates timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; receiving, from the network node, a configuration of one or more gap periods for phase calibration, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration, wherein the phase calibration reference signal and phase calibration duration are triggered based at least in part on phase coherence tracking or a request from the NCR for the phase calibration reference signal for phase calibration; relaying the phase calibration reference signal from the network node to a user equipment (UE) according to an NCR RF chain on-off configuration, wherein each repetition of the phase calibration reference signal is communicated with one NCR RF chain among the number of NCR RF chains on and the other NCR RF chains among the number of NCR RF chains off; relaying a report indicating a phase change measurement associated with the phase calibration reference signal from the UE to the network node, wherein the report indicates the phase change measurement for different repetitions of the phase calibration reference signal; as well as An indication of a phase value to be calibrated at the NCR is received from the network node and based at least in part on the report, wherein the phase calibration is implemented at the NCR based at least in part on the indication received from the NCR.

21. A method of wireless communication performed by a network node, the method include: receiving a network controlled repeater (NCR) capability report from an NCR, the NCR capability report indicating support for NCR forwarding beamforming and a number of NCR radio frequency (RF) chains; and Based at least in part on the NCR capability report, one or more of: phase control for the number of NCR RF chains supporting multiple-input multiple-output (MIMO) operations, or phase calibration for the NCR is facilitated.

22. The method of claim 21, wherein facilitating said phase control further comprises: include: receiving an indication of a codebook size for a steerable phase from the NCR; performing a synchronization signal block (SSB) scan based at least in part on the indication of the codebook size for the controllable phase, wherein an optimal controllable phase value relative to a plurality of controllable phase values ​​is based at least in part on the SSB scan; sending a channel state information reference signal (CSI-RS) to a user equipment (UE) and via the NCR by setting the optimal controllable phase value based at least in part on the NCR; and One or more of: a composite channel measurement, a rank indicator, a precoding matrix indicator, or a channel quality indicator is received from the UE and based at least in part on the CSI-RS.

23. The method of claim 21, wherein facilitating the phase control further comprises: include: performing initial access with a user equipment (UE) based at least in part on codebook-based synchronization signal block (SSB) scanning; Sending a plurality of time-division multiplexed channel state information reference signal (CSI-RS) resources to the UE and via the NCR according to the NCR RF chain on-off configuration, wherein each CSI-RS resource is sent when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; as well as An indication of one or more of: an optimal controllable phase value, a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI) is received from the UE and based at least in part on the multiple time-division multiplexed CSI-RS resources sent according to the NCR RF link on-off configuration, wherein one or more of the RI, the PMI, or the CQI is based at least in part on a composite channel measurement, and wherein the composite channel measurement is based at least in part on a UE channel estimate during the NCR RF link on-off time.

24. The method of claim 21, wherein facilitating the phase control further comprises: include: receiving a plurality of time-division multiplexed sounding reference signal (SRS) resources from a user equipment (UE) and via the NCR according to an NCR RF chain on-off configuration, wherein each SRS resource is received when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; as well as Determining an optimal controllable phase value and a precoding matrix based at least in part on the plurality of time-division multiplexed SRS resources received according to the NCR RF link on-off configuration, wherein the precoding matrix is ​​based at least in part on a composite channel measurement, and wherein the composite channel measurement is based at least in part on a network node channel estimate during the NCR RF link on-off time.

25. The method according to claim 21, further comprising: include: A network node configuration is sent to the NCR, wherein the network node configuration indicates one or more of the following: a semi-static per-chain on-off indication for channel state information reference signal (CSI-RS) or sounding reference signal (SRS) transmission, a semi-static code point indication for codebook-based phase control, a dynamic code point indication for codebook-based phase control, or a dynamic per-panel phase value for chain-by-chain phase control, wherein one or more of the phase control for the number of NcRRF chains or the phase calibration for the NCR is at least partially based on the network node configuration.

26. The method of claim 21, wherein facilitating the phase calibration further comprises: include: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein the one or more gap periods are associated with downlink-uplink switching, on-off switching, or gain control, and wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; as well as A phase calibration duration is triggered based at least in part on phase coherence tracking or a request received from the NCR for a gap period for phase calibration, wherein the phase calibration at the NCR is based at least in part on an internal calibration signal at the NCR.

27. The method of claim 21, wherein facilitating the phase calibration further comprises: include: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal received from the NCR for phase calibration; as well as The phase calibration reference signal is sent to the NCR based at least in part on the trigger, wherein the phase calibration at the NCR is based at least in part on a measurement of the phase calibration reference signal.

28. The method of claim 21, wherein facilitating the phase calibration further comprises: include: receiving an indication of a minimum duration for phase calibration from the NCR; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; as well as The phase calibration reference signal and the phase calibration duration are triggered at least in part based on phase coherence tracking or a request for the phase calibration reference signal for phase calibration received from the NCR, wherein the phase calibration reference signal is triggered to be received from a user equipment (UE), and wherein the phase calibration at the NCR is at least in part based on a measurement of the phase calibration reference signal received from the UE.

29. The method of claim 21, wherein facilitating the phase calibration further comprises: include: receiving from the NCR an indication of the number of NCR RF chains and a minimum duration for phase calibration; sending a configuration associated with a phase calibration reference signal to the NCR, wherein the configuration indicates timing for the phase calibration reference signal, a number of repetitions corresponding to the number of NCR RF chains, and additional resources and sequence information associated with the phase calibration reference signal; sending a configuration of one or more gap periods for phase calibration to the NCR, wherein one or more signals are not forwarded by the NCR during the one or more gap periods for phase calibration; triggering the phase calibration reference signal and phase calibration duration based at least in part on phase coherence tracking or a request for the phase calibration reference signal received from the NCR for phase calibration; transmitting the phase calibration reference signal to a user equipment (UE) and via the NCR according to an NCR RF chain on-off configuration, wherein each repetition of the phase calibration reference signal is transmitted when one NCR RF chain among the number of NCR RF chains is on and the other NCR RF chains among the number of NCR RF chains are off; receiving, from the UE, a report indicating a phase variation measurement associated with the phase calibration reference signal, wherein the report indicates the phase variation measurement for different repetitions of the phase calibration reference signal; as well as An indication of a phase value to be calibrated at the NCR is sent to the NCR and based at least in part on the report, wherein the phase calibration is implemented at the NCR based at least in part on the indication received from the NCR.

30. A method of wireless communication performed by a network controlled repeater (NCR), the method include: Sending an NCR capability report to a network node, the NCR capability report indicating support for NCR forwarding beamforming and a certain number of NCR radio frequency (RF) chains; and facilitating one or more of the following based at least in part on the NCR capability report: phase control of the number of NCR RF chains to support multiple-input multiple-output (MIMO) operations, or phase calibration for the NCR.

Images