User equipment transmit / receive calibration using assistance information in time division duplex

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a transmit / receive (Tx / Rx) imbalance associated with a user equipment (UE) may be calibrated. For example, in some aspects, a UE may transmit a sounding reference signal (SRS) to a secondary node, which may provide the UE with secondary information indicating a received version of the SRS or an effective channel based on an estimate of the SRS transmission, which may then use the secondary information to calculate one or more Tx / Rx imbalance values. Additionally or alternatively, the UE may receive a reference signal from the secondary node and provide feedback to the secondary node, and the secondary information may indicate one or more Tx / Rx imbalance values to the UE. In either case, the UE may then select a pre-decoder for transmission to the secondary node using one or more Tx / Rx imbalance values.

Description

Cross-references to related applications

[0001] This patent application claims priority to U.S. Patent Application No. 18 / 362,792, filed July 31, 2023, entitled “USER EQUIPMENT TRANSMIT / RECEIVE CALIBRATION IN TIME DIVISION DUPLEXING USING ASSISTANCE INFORMATION”, assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0002] All aspects of this disclosure relate to wireless communication in general, and specifically to techniques, apparatus and methods associated with user equipment (UE) transmit / receive (Tx / Rx) calibration using auxiliary information in time division duplex (TDD). Background Technology

[0003] Wireless communication systems are widely deployed to provide a variety of services, including voice, text, messaging, video, data, and / or other services. Services may include unicast, multicast, and / or broadcast services, etc. Typical wireless communication systems employ multiple access radio access technologies (RATs) capable of supporting communication with multiple users by sharing available system resources (e.g., time-domain resources, frequency-domain resources, spatial-domain resources, and / or device transmit power, etc.). Examples of such multiple access RATs include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0004] The aforementioned Multiple Access RATs have been adopted in various telecommunications standards to provide a common protocol enabling different wireless communication devices to communicate at the city, national, regional, or global level. An example telecommunications standard is New Radio (NR). NR (also known as 5G) is part of the continuous evolution of mobile broadband announced by the 3rd Generation Partnership Project (3GPP). NR (and other mobile broadband evolutions beyond NR) can be designed to better support the deployment of Internet of Things (IoT) and degraded-capacity devices, industrial connectivity, millimeter-wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployment, sidelinks and other device-to-device direct communication technologies (e.g., cellular vehicle-to-everything (V2X) communication), massive MIMO, decomposed network architectures and network topology expansion, multi-subscriber implementations, high-precision positioning and / or radio frequency (RF) sensing, and more. As the demand for mobile broadband access continues to grow, further improvements to NR are possible, and other radio access technologies (such as 6G) can be introduced to further advance mobile broadband evolution.

[0005] In Time Division Duplex (TDD) systems, channel reciprocity typically refers to a property of wireless (air) communication channels where uplink and downlink channels experience similar propagation characteristics in both communication directions. For example, because uplink and downlink channels share the same physical medium and propagation environment, the channel conditions observed in the uplink direction (from the UE to the network node) are highly correlated with those observed in the downlink direction (from the network node to the UE). Channel reciprocity plays a crucial role in improving the efficient use of resources in TDD systems because information received in uplink transmissions can be used to perform channel estimation and equalization in the downlink direction (and vice versa), and this information can then be used to optimize transmissions in the downlink direction (and vice versa). For example, channel reciprocity properties can be used to implement reciprocity-based beamforming and / or pre-decoding in TDD-based MIMO systems. For instance, in the downlink direction, a network node can receive a sounding reference signal (SRS) from the UE, which can be used to estimate the uplink channel. Assuming the uplink and downlink channels are reciprocal, a network node can obtain pre-decoding for one or more downlink transmissions (e.g., Physical Downlink Shared Channel (PDSCH) transmission or Channel State Information Reference Signal (CSI-RS) transmission) based on the estimated uplink channel. Similarly, in the uplink direction, the UE can receive CSI-RS from the network node, which can be used to estimate the downlink channel. Assuming the uplink and downlink channels are reciprocal, the UE can obtain pre-decoding for one or more uplink transmissions (e.g., Physical Uplink Shared Channel (PUSCH) transmission or SRS transmission) based on the estimated downlink channel. Furthermore, channel reciprocity can be applied to other TDD communication systems, such as sidelink communication between UEs.

[0006] However, in practice, each node communicating via a wireless channel in a TDD system (e.g., a network node and a UE, or a first UE and a second UE) introduces transmit / receive (Tx / Rx) mismatches (such as amplitude and phase perturbations) into the signals transmitted and received via the wireless channel. Therefore, despite the fact that the propagation channel is reciprocal, the components included in the transceiver RF chain (e.g., power amplifiers, low-noise amplifiers, and / or RF mixers and filters, etc.) are typically not identical in the Tx and Rx branches. The differences between components in the Tx and Rx branches cause differences between the Tx and Rx responses, or Tx / Rx mismatch, whereby the effective downlink and uplink channels between any two given antennas may not be reciprocal. Therefore, in some cases, it may be necessary to perform Tx / Rx calibration in a TDD system. For example, Tx / Rx calibration may include techniques for measuring the effective imbalance between the Tx and Rx antennas and compensating for the effective imbalance when selecting or configuring the pre-decoder. In other words, Tx / Rx calibration techniques can be used to make effective downlink and uplink channels (or transmit and receive channels) reciprocal in a TDD system. This allows transmitters (e.g., network nodes for downlink, or UEs for uplink or sidelink) to acquire channels based on received reference signals and to derive pre-decoding based on the acquired channels. For example, in some cases, network nodes can perform self-calibration using additional hardware (such as additional antennas used by the network node to calibrate antenna arrays). Additionally or alternatively, network nodes can perform over-the-air calibration, where one or more auxiliary nodes (e.g., other network nodes or UEs) provide auxiliary information that the network node can use to acquire one or more Tx / Rx imbalance values. However, self-calibration is difficult or impractical for UEs due to the need for additional hardware. Furthermore, wireless networks currently lack support for over-the-air techniques for performing Tx / Rx calibration at the UE. Summary of the Invention

[0007] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include a processing system comprising one or more processors and one or more memories coupled to the processors. The processing system may be configured to cause the UE to receive auxiliary information from a secondary node related to transmit / receive (Tx / Rx) mismatch associated with the UE. The processing system may be configured to cause the UE to obtain one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the secondary node. The processing system may be configured to cause the UE to estimate an effective uplink channel based on a downlink channel estimated according to a downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. The processing system may be configured to cause the UE to transmit uplink communication using a pre-decoder associated with the estimated effective uplink channel.

[0008] Some aspects described herein relate to a method for wireless communication by a UE. The method may include receiving auxiliary information from a secondary node related to a Tx / Rx mismatch associated with the UE. The method may include obtaining one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the secondary node. The method may include estimating an effective uplink channel based on a downlink channel estimation associated with a downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. The method may include transmitting uplink communication using a pre-decoder associated with the estimated effective uplink channel.

[0009] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication executed by one or more processors of a UE. When executed by one or more processors of the one or more instructions, the set of instructions enables the one or more instructions to receive auxiliary information related to a Tx / Rx mismatch associated with the UE from an auxiliary node. When executed by one or more processors of the one or more instructions, the set of instructions enables the one or more instructions to obtain one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the auxiliary node. When executed by one or more processors of the one or more instructions, the set of instructions enables the one or more instructions to estimate an effective uplink channel based on a downlink channel estimation associated with a downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. When executed by one or more processors of the one or more instructions, this instruction set enables the one or more instructions to use a pre-decoder associated with the estimated effective uplink channel to transmit uplink communication.

[0010] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for receiving auxiliary information from an auxiliary node related to a Tx / Rx mismatch associated with the apparatus. The apparatus may include components for obtaining one or more Tx / Rx imbalance values ​​associated with the apparatus based on the auxiliary information received from the auxiliary node. The apparatus may include components for estimating an effective uplink channel based on a downlink channel estimation associated with a downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the apparatus. The apparatus may include components for transmitting uplink communication using a pre-decoder associated with the estimated effective uplink channel.

[0011] Various aspects of this disclosure can generally be realized by or as the following: methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network nodes, network entities, wireless communication devices and / or processing systems as fully described and illustrated with reference to the specification and drawings.

[0012] The preceding paragraphs of this section have broadly summarized some aspects of this disclosure. These and additional aspects, along with their associated advantages, will be described below. The disclosed aspects can serve as the basis for modifying or designing other aspects for achieving the same or similar purposes of this disclosure. Such equivalent aspects do not depart from the scope of the appended claims. The characteristics of the aspects disclosed herein (both their organization and manner of operation) and their associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Attached Figure Description

[0013] The accompanying drawings illustrate some aspects of this disclosure but do not limit its scope, as other aspects can be achieved by this description. Each drawing in the drawings is provided for illustrative and descriptive purposes and is not intended to define limitations on the claims. Identical or similar reference numerals in different drawings may identify identical or similar elements.

[0014] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0015] Figure 2 This is a diagram illustrating communication between an example network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0016] Figures 3A to 3B This is a diagram illustrating an example of UE transmit / receive (Tx / Rx) calibration using auxiliary information in time division duplex (TDD) according to this disclosure.

[0017] Figure 4 This is a diagram illustrating an example of UE Tx / Rx calibration using auxiliary information in TDD, according to this disclosure.

[0018] Figure 5 This is a flowchart illustrating an example procedure performed by a UE according to this disclosure.

[0019] Figure 6 This is a diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0020] Various aspects of this disclosure are described below with reference to the accompanying drawings. However, aspects of this disclosure may be embodied in many different forms and should not be construed as limited to any particular aspect illustrated or described with reference to the drawings or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, apparatuses or methods may be implemented using the various combinations or quantities of aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover apparatuses having structures and / or functions other than, or different from, those structures and / or functions that can practice the various aspects of this disclosure set forth herein. Any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0021] Various methods, operations, apparatuses, and techniques will now be presented with reference to them. These methods, operations, apparatuses, and techniques will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively, “elements”). These elements may be implemented using hardware, software, or a combination of hardware and software. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0022] The various aspects generally relate to over-the-air techniques for performing Tx / Rx calibration at the UE using auxiliary information provided by an auxiliary node (e.g., a network node communicating with the UE via an access link or a neighboring UE communicating with the UE via a side link). Some aspects more specifically relate to techniques that enable the UE to obtain one or more Tx / Rx imbalance values. For example, in some aspects, the over-the-air techniques described herein enable the UE to obtain a Tx / Rx imbalance matrix containing one or more Tx / Rx imbalance values. Additionally or alternatively, the dimension of the Tx / Rx imbalance matrix (or the number of values ​​included in the Tx / Rx imbalance matrix) may correspond to the number of antennas at the UE, and each Tx / Rx imbalance value may be a complex value including a gain imbalance component and a phase imbalance component. For example, in a first method, the UE may transmit a reference signal to the auxiliary node, and the auxiliary node may then transmit auxiliary information to the UE indicating a received version of the reference signal or an effective channel estimated based on the received version of the reference signal. The auxiliary node may also transmit a reference signal to the UE, and the UE may then calculate or otherwise obtain a Tx / Rx imbalance value based on auxiliary information provided by the auxiliary node and an estimated effective channel based on the reference signal transmitted by the auxiliary node. Additionally or alternatively, in a second method, the auxiliary node may transmit a reference signal to the UE, and the UE may provide feedback to the auxiliary node indicating a received version of the reference signal or an estimated effective channel based on the received version of the reference signal. The UE may also transmit a reference signal to the auxiliary node, and the auxiliary node may then calculate or otherwise obtain a Tx / Rx imbalance value based on the feedback provided by the UE and an estimated effective channel based on the reference signal transmitted by the UE. The auxiliary node may then indicate the Tx / Rx imbalance value to the UE. In either case, the UE may then perform reciprocity-based MIMO operation, thereby selecting a pre-decoder for transmitting signals based on the Tx / Rx imbalance value and the estimated effective channel based on the reference signal transmitted by the auxiliary node. Some aspects described herein also relate to capability signaling and / or dynamic signaling for enabling and / or configuring Tx / Rx calibration, and to techniques that allow joint Tx / Rx calibration at the UE and auxiliary nodes.

[0023] Specific aspects of the subject matter described herein can be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques can be used to calibrate Tx / Rx mismatches that cause differences between the Tx and Rx responses at the UE, which would otherwise prevent the UE from performing reciprocity-based transmission. For example, the techniques described herein can be used to measure and compensate for the effective imbalance between the Tx and Rx antennas at the UE, enabling the UE to perform reciprocity-based MIMO transmission. For example, as described herein, reciprocity-based MIMO transmission can provide various potential advantages, including the ability to perform channel estimation and equalization for transmission using information associated with the received reference signal, which eliminates or reduces the need for explicit measurements of the transmission channel and / or reduces the overhead of acquiring channel state information, thereby resulting in improved spectral efficiency and overall performance in TDD systems.

[0024] Multiple access radio access technology (RAT) has been adopted in various telecommunications standards to provide a common protocol that enables different wireless communication devices to communicate at the city, national, regional, or global level. For example, New Radio (NR) (also known as 5G) is part of an ongoing evolution of mobile broadband, driven by the 3rd Generation Partnership Project (3GPP) to better support the deployment of Internet of Things (IoT) and Reduced Capability (RedCap) devices, industrial connectivity, millimeter wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployment, sidelinks and other device-to-device direct communication technologies, massive MIMO, decomposed network architectures and network topology expansion, multi-subscriber implementations, high-precision positioning and / or radio frequency (RF) sensing, and more. As the demand for mobile broadband access continues to grow, further improvements to NR can be made, and other RATs such as 6G can be introduced to further advance the evolution of mobile broadband (e.g., to support full-duplex or other advanced duplex schemes, artificial intelligence or machine learning, cooperative communication, large-scale and environmental IoT, enhanced modulation and decoding, new frequency bands, overlapping spectrum use and extended reality (XR), etc.).

[0025] Figure 1This is an illustration of an example of a wireless communication network 100 according to the present disclosure. The wireless communication network 100 may be a 5G (or NR) network or a 6G network, etc., or may include elements of such networks. The wireless communication network 100 may include a plurality of network nodes 110 (also referred to as network entities), shown as network node (NN) 110a, network node 110b, network node 110c, and network node 110d. Network nodes 110 may support communication with a plurality of UEs 120 (shown as UE120a, UE 120b, UE 120c, UE 120d, and UE 120e).

[0026] Network node 110 may include one or more devices or systems that enable communication between UE 120 and one or more components of wireless communication network 100. Network node 110 may be, may include, or may be referred to as an NR network node, 5G network node, 6G network node, node B, eNB (e.g., in 4G), gNB (e.g., in 5G), access point (AP), transmit / receive point (TRP), network mobility element, core network node, network element, network equipment, and / or one or more devices of another type included in radio access network (RAN).

[0027] Network node 110 may be implemented as a single physical node (e.g., a single physical structure) or as two or more physical nodes (e.g., two or more different physical structures). For example, network node 110 may be a device or system implementing a portion of a radio protocol stack, a device or system implementing a complete protocol stack (such as a complete gNB protocol stack), or a collection of devices or systems collectively implementing a complete protocol stack. For example, and as shown, network node 110 may be an aggregated network node, meaning that network node 110 can implement a full radio protocol stack physically and logically integrated within a single node (e.g., a single physical structure) in the wireless communication network 100. For example, aggregated network node 110 may consist of a single standalone base station or a single TRP that uses the full radio protocol stack to implement or facilitate communication between UE 120 and the core network of wireless communication network 100.

[0028] Alternatively, and also as shown in the figure, network node 110 can be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 can use protocol stacks that are physically distributed and / or logically distributed across two or more nodes in the same or different geographical locations. In some deployments, decomposed network node 110 can be used in integrated access and backhaul (IAB) networks, in open radio access networks (O-RAN) (such as network configurations initiated by the O-RAN Alliance), or in virtualized radio access networks (vRAN) (also referred to as cloud radio access networks (C-RAN)) to facilitate scaling of the communication system by decomposing base station functionality into multiple separately deployable units.

[0029] Network nodes 110 of the wireless communication network 100 may include one or more central units (CUs), one or more distributed units (DUs), and / or one or more radio units (RUs). CUs may host one or more higher-layer control functions, such as Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, and / or Service Data Adaptation Protocol (SDAP) functions, etc. DUs may host one or more of the Radio Link Control (RLC) layer, Media Access Control (MAC) layer, and / or one or more high physical (PHY) layers, at least in part, according to functional splits (such as those defined by the 3rd Generation Partnership Project (3GPP)). In some examples, DUs may also host one or more low-PHY layer functions, such as Fast Fourier Transform (FFT), Inverse FFT (iFFT), beamforming, Physical Random Access Channel (PRACH) extraction and filtering, and / or scheduling of resources for one or more UEs 120, etc. RUs can host RF processing functions or low-PHY layer functions, such as FFT, iFFT, beamforming, or PRACH extraction and filtering, based on functional splitting (such as lower-layer functional splitting). In such an architecture, each RU can be operated to handle over-the-air (OTA) communications with one or more UEs 120.

[0030] In some aspects, network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. Additionally or alternatively, network node 110 may include one or more near real-time (near RT) RAN Intelligent Controllers (RICs) and / or one or more non-real-time (non-RT) RICs. In some examples, CUs, DUs, and / or RUs may be implemented as virtual units, such as Virtual Central Units (VCUs), Virtual Distributed Units (VDUs), or Virtual Radio Units (VRUs), etc. Virtual units may be implemented as virtual network functions, such as those associated with cloud deployments.

[0031] In some examples, network node 110 may be, may include, or operate as a RU, TRP, or base station communicating with one or more UEs 120 via a radio access link (which may be referred to as a "Uu" link). The radio access link may include a downlink and an uplink. A "downlink" (or "DL") refers to the communication direction from network node 110 to UE 120, and an "uplink" (or "UL") refers to the communication direction from UE 120 to network node 110. Downlink channels may include one or more control channels and one or more data channels. Downlink control channels may be used to transmit downlink control information (e.g., scheduling information, reference signals, and / or configuration information) from network node 110 to UE 120. Downlink data channels may be used to transmit downlink data (e.g., user data associated with UE 120) from network node 110 to UE 120. Downlink control channels may include one or more physical downlink control channels (PDCCH), and downlink data channels may include one or more physical downlink shared channels (PDSCH). The uplink channel may similarly include one or more control channels and one or more data channels. The uplink control channel can be used to transmit uplink control information (e.g., corresponding reference signals and / or feedback to one or more downlinks) from UE 120 to network node 110. The uplink data channel can be used to transmit uplink data (e.g., user data associated with UE 120) from UE 120 to network node 110. The uplink control channel may include one or more physical uplink control channels (PUCCH), and the uplink data channel may include one or more physical uplink shared channels (PUSCH). The downlink and uplink may each include a set of resources on which network node 110 and UE 120 can communicate.

[0032] In various examples, in addition to half-duplex operation, some of the network nodes 110 and UE 120 of the wireless communication network 100 can also be configured for full-duplex operation. In half-duplex mode, network node 110 or UE 120 may perform only one of transmission or reception during a specific time resource period (such as a specific time slot, symbol, or other time period). Half-duplex operation may involve time division duplex (TDD), where the DL transmission of network node 110 and the UL transmission of UE 120 do not occur in the same time resource (i.e., the transmissions do not overlap in time). In contrast, network node 110 or UE 120 operating in full-duplex mode can transmit and receive communications concurrently (e.g., in the same time resource). By operating in full-duplex mode, network node 110 and / or UE 120 can generally increase the capacity of the network and radio access links. In some examples, full-duplex operation may involve frequency division duplex (FDD), where network node 110 performs DL transmission in a first frequency band or on a first component carrier, and UE 120 performs transmission in a second frequency band or on a second component carrier, which is different from the first frequency band or the first component carrier, respectively. In some examples, full-duplex operation may be enabled for UE 120 but not for network node 110. For example, UE 120 may simultaneously transmit UL to the first network node 110 and receive DL transmission from the second network node 110 in the same time resource. In some other examples, full-duplex operation may be enabled for network node 110 but not for UE 120. For example, network node 110 may simultaneously transmit DL to the first UE 120 and receive UL transmission from the second UE 120 in the same time resource. In some other examples, full-duplex operation may be enabled for both network node 110 and UE 120.

[0033] In some examples, UE 120 and network node 110 can perform MIMO communication. "MIMO" generally refers to the simultaneous transmission or reception of multiple signals (such as multiple layers or multiple data streams) within the same time and frequency resources. MIMO technology typically utilizes multipath propagation. MIMO can be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO can support simultaneous transmission to multiple receivers, which is called multi-user MIMO (MU-MIMO). Some radio access technologies (RATs) can employ advanced MIMO techniques such as mTRP operation (including redundant transmission or reception on multiple TRPs), reciprocity in the time or frequency domain, single-frequency network (SFN) transmission, or noncoherent joint transmission (NC-JT). Furthermore, in wireless local area networks (WLANs), one or more access points (APs) and one or more stations (STAs) with multiple antennas can support spatial multiplexing, which can be used to improve spectral efficiency and the resulting throughput. To achieve spatial multiplexing, the transmitting device divides the data stream into a certain number of separate independent spatial streams, which are then separately encoded and transmitted in parallel via multiple transmitting antennas.

[0034] As described above, in some aspects, the wireless communication network 100 may be an IAB network, may include an IAB network, or may be included in an IAB network. In an IAB network, at least one network node 110 is an anchor network node communicating with a core network. The anchor network node 110 may also be referred to as an IAB donor (or "IAB-donor"). The IAB donor 110 is connected to the core network via a wired backhaul link. For example, the Ng interface of the IAB donor 110 may terminate at the core network. Additionally or alternatively, the IAB donor 110 may be connected to one or more devices in the core network that provide core access and mobility management functions (AMF). The IAB network typically also includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply IAB nodes (or "IAB-nodes"). Each IAB node 110 can communicate directly with the IAB donor 110 to access the core network via a wireless backhaul link, or indirectly with the IAB donor 110 via one or more other IAB nodes 110 and an associated wireless backhaul link forming a backhaul path to the core network. Some IAB donors 110 or other IAB nodes 110 can also communicate directly with one or more UEs 120 via a wireless access link carrying access traffic. In some examples, network resources used for wireless communication (such as time resources, frequency resources, and / or spatial resources) can be shared between the access link and the backhaul link.

[0035] IAB donor 110 may include a CU that performs Access Node Controller (ANC) functions and / or AMF functions. The CU may configure the DU of IAB donor 110 and / or configure one or more IAB nodes 110 connected to the core network via IAB donor 110 (e.g., Mobile Terminal (MT) functions and / or DU functions of each of the IAB nodes). Therefore, the CU of IAB donor 110 may control and / or configure the entire IAB network (or a portion thereof) connected to the core network via IAB donor 110, such as by using control messages and / or configuration messages (e.g., RRC configuration messages or F1 Application Protocol (F1AP) messages).

[0036] Unlike IAB donor 110, IAB node 110 may also control and / or schedule communications for second IAB node 110 (e.g., when an IAB node provides DU functionality for the MT function of the second IAB node). In such a deployment, first IAB node 110 may be referred to as the parent IAB node of second IAB node 110, and second IAB node 110 may be referred to as a child IAB node of first IAB node 110. Similarly, child IAB nodes of second IAB node 110 may be referred to as grandchild IAB nodes of first IAB node 110. The DU functionality of the parent IAB node can control and / or schedule communications for the child IAB nodes of that parent IAB node. In some examples, the DU functionality may provide limited control over the communications of grandchild nodes, such as through indications of soft resources or restricted beams at child nodes associated with the grandchild node. In some examples, IAB node 110 implementing DU functionality may be referred to as a scheduling node or scheduling component, and IAB node 110 implementing MT functionality may be referred to as a scheduled node or scheduled component.

[0037] In some examples, any network node 110 relaying communication may be referred to as a relay network node, a relay station, or simply a repeater. A repeater may receive communications from an upstream station (e.g., another network node 110 or UE 120) and transmit communications to a downstream station (e.g., UE 120 or another network node 110). In this case, the wireless communication network 100 may include or be referred to as a "multi-hop network." Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. Additionally or alternatively, UE 120 can be a relay station capable of relaying transmissions to or from other UE 120s, or can operate as such a relay station. UE 120 relaying communication can be referred to as a UE repeater or relay UE, etc.

[0038] In some examples, relay network node 110 may include an electromagnetic radiation reflection component that can be used to relay (e.g., reflect) signals from a first other network node 110 to a second other network node 110 or UE 120. Such relay network node 110 may include, for example, a radio frequency reflection array configured to perform radio frequency reflection functionality. The electromagnetic radiation reflection array may be, for example, a reconfigurable smart surface (RIS) (which may also be referred to as a smart reflective surface (IRS)).

[0039] UE 120 may be physically distributed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. UE 120 may be, may include, an access terminal, another terminal, a mobile station, or a subscriber unit, or may be included in an access terminal, another terminal, a mobile station, or a subscriber unit. UE 120 may be, or may include, a cellular phone (e.g., a smartphone), 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 smartwatch, smart clothing, smart glasses, a smart wristband and / or smart jewelry (such as a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device and / or a satellite radio), an extended reality (XR) device, a vehicle component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device), a UE function of a network node, and / or any other suitable device or function that can communicate via a wireless medium, or may be coupled to them.

[0040] UE 120 may include or be included within a housing that houses components associated with UE 120, such as one or more processor components and / or one or more memory components. One or more processor components may be coupled to one or more memory components and / or other components. For example, processor components (e.g., one or more processors) and memory components (e.g., one or more memories) may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled to each other. In some examples, UE 120 includes one or more chips, system-on-a-chip (SoC), chipsets, packages, or devices that individually or collectively constitute or form a processing system. The processing system includes processor (or “processing”) circuitry in the form of one or more processors, microprocessors, processing units (such as central processing units (CPUs), graphics processing units (GPUs), or digital signal processors (DSPs)), processing blocks, application-specific integrated circuits (ASICs), programmable logic devices (PLDs) (such as field-programmable gate arrays (FPGAs)), or other discrete gate or transistor logic components or circuits (all of which are generally referred to herein individually as “processors” or collectively as “processors” or “processor circuitry”). One or more of these processors may be individually or collectively configured to perform the various functions or operations described herein. The processing system may also include memory circuitry in the form of one or more memory devices, memory blocks, memory elements, or other discrete gate or transistor logic components or circuits, each of which may include tangible storage media such as random access memory (RAM) or read-only memory (ROM) or combinations thereof (all of which are generally referred to herein individually as "memory," or collectively as "memory" or "memory circuitry"). One or more of these memories may be coupled to one or more of the processors and may individually or collectively store processor-executable code that, when executed by one or more of the processors, configures one or more of the processors to perform the various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be pre-configured to perform the various functions or operations described herein without requiring software configuration. The processing system may also include one or more modems (such as Wi-Fi (e.g., IEEE compliant) modems or cellular (e.g., 3GPP 4G LTE, 5G, or 6G compliant) modems), or be coupled to such modems. In some implementations, one or more processors of the processing system include or implement one or more modems in the modem.The processing system may also include, or be coupled to, multiple radio components (collectively, “radio components”), multiple RF chains, or multiple transceivers, each of which may in turn be coupled to one or more of a plurality of antennas. In some embodiments, one or more processors of the processing system include or implement one or more of the radio components, RF chains, or transceivers.

[0041] Some UEs 120 may be considered Machine-Type Communication (MTC), or Evolved or Enhanced Machine-Type Communication (eMTC) UEs (or Further Enhanced eMTC (feMTC), or Enhanced feMTC (efeMTC), or further evolutions thereof, all of which may be simply referred to as "MTC"). An MTC UE may be, may include, or may be included in or coupled with the following: robots, unmanned aerial vehicles, remote devices, sensors, instruments, monitors, and / or location tags. Some UEs 120 may be considered IoT devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. IoT UEs or NB-IoT devices may be, may include, or may be included in or coupled with the following: industrial machines, appliances, refrigerators, doorbell camera devices, home automation devices, and / or lighting fixtures, etc. Some UEs 120 may be considered customer premises equipment, which may include telecommunications equipment installed at a customer location (such as a home or office) to enable access to a service provider's network (such as being included in or communicating with wireless communication network 100).

[0042] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly with each other using sidelink communication (e.g., without communicating through a network node 110 acting as an intermediary). As an example, UE 120a can send data, control information, or other signaling directly to UE 120e as sidelink communication. This contrasts with, for example, UE 120a first sending data to network node 110 in UL communication, and then that network node sending data to UE 120e in DL communication. In various examples, UE 120 can communicate using peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or vehicle-to-pedestrian (V2P) protocols), and / or mesh network communication protocols. In some deployments and configurations, network node 110 may schedule and / or allocate resources for sidelink communication between UEs 120 in the wireless communication network 100. In some other deployments and configurations, UE 120 (instead of network node 110) may perform or cooperate with or negotiate with one or more other UEs to perform scheduling operations, resource selection operations, and / or other operations for sidelink communication.

[0043] Downlink and uplink resources may include time-domain resources (frames, subframes, time slots, and / or symbols), frequency-domain resources (bands, frequency carriers, subcarriers, resource blocks, and / or resource elements), and / or spatial-domain resources (specific transmission directions and / or beam parameters). Frequency-domain resources in some bands may be subdivided into bandwidth portions (BWPs). A BWP may be a contiguous block of frequency-domain resources allocated to one or more UEs 120 (e.g., a contiguous block of resource blocks). UE 120 may be configured using both uplink and downlink BWPs (where the uplink and downlink BWPs may be the same BWP or different BWPs). BWPs may be dynamically configured (e.g., configured by sending downlink control information (DCI) to one or more UEs 120 via network node 110) and / or reconfigured, meaning that BWPs may be adjusted in real-time (or near real-time) based on changing network conditions in the wireless communication network 100 and / or based on the specific requirements of one or more UEs 120. This enables more efficient use of available frequency domain resources in the wireless communication network 100, as less frequency domain resources can be allocated to the BWP for UE 120 (which reduces the amount of frequency domain resources that UE 120 needs to monitor), thus allowing more frequency domain resources to be distributed across multiple UE 120s. Therefore, the BWP can also assist in the implementation for such UE 120s by facilitating the configuration of smaller bandwidths for communications performed by lower-capacity UE 120s.

[0044] As indicated above, a BWP can be configured as a subset or part of the total or full component carrier bandwidth, and typically forms or covers a set of consecutive common resource blocks (CRBs) within the full component carrier bandwidth. In other words, within the carrier bandwidth, a BWP begins at a CRB and can span a set of consecutive CRBs. Each BWP can be associated with its own set of parameters (indicating subcarrier spacing (SCS) and cyclic prefix (CP)). UE 120 can be configured with up to four downlink BWPs and up to four uplink BWPs for each serving cell. To achieve reasonable UE battery consumption, under typical operation, only one downlink BWP and one uplink BWP are typically active at a given time on the active serving cell. The active BWP defines the operating bandwidth of UE 120 within the operating bandwidth of the serving cell, while all other BWPs configured on UE 120 are deactivated. On deactivated BWPs, UE 120 does not send or receive any communication.

[0045] Some network nodes 110 (e.g., base stations, RUs, or TRPs) can provide communication coverage for specific geographic areas. In 3GPP, the term "cell" can refer to the coverage area of ​​network node 110 or to network node 110 itself, depending on the context in which the term is used. Network node 110 can support one or more (e.g., three) cells. In some examples, network node 110 can provide communication coverage for macro cells, pico cells, femto cells, or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UE 120 with a service subscription. A femto cell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UE 120 associated with that femto cell (e.g., UE 120 in a Closed Subscriber Group (CSG)). A network node 110 used for a macro cell may be referred to as a macro network node. Network node 110 used for a pico cell may be referred to as a pico network node. Network node 110 used for a femtocell may be referred to as a femto network node or a home network node. In some examples, the cell may not necessarily be stationary. For example, the geographical area of ​​the cell may be mobile based on the location of the associated mobile network node 110 (e.g., a train, satellite base station, unmanned aerial vehicle, or non-terrestrial network (NTN) network node).

[0046] The wireless communication network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, piconet nodes, femtonet nodes, relay network nodes, aggregation network nodes, and / or decomposition network nodes, etc. Figure 1 In the example shown, network node 110a can be a macro network node for macro cell 130a, network node 110b can be a pico network node for pico cell 130b, and network node 110c can be a femto network node for femto cell 130c. Compared to other types of network nodes 110, the various types of network nodes 110 typically transmit at different power levels, serve different coverage areas, and / or have different effects on interference in the wireless communication network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0047] Network nodes 110 and UEs 120 of wireless communication network 100 can communicate using the electromagnetic spectrum, which can be subdivided by frequency or wavelength into various categories, frequency bands, carriers, and / or channels. For example, devices in wireless communication network 100 can communicate using one or more operating frequency bands. In some aspects, multiple wireless networks 100 can be deployed in a given geographical area. Each wireless communication network 100 can support a specific RAT (which may also be referred to as an air interface) and can operate on one or more carrier frequencies in one or more frequency ranges. Examples of RATs include 4G RAT, 5G / NR RAT, and / or 6G RAT, etc. In some examples, when multiple RATs are deployed in a given geographical area, each RAT in that geographical area can operate on a different frequency to avoid interference with each other.

[0048] Various operating frequency bands have been defined as frequency ranges designated FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Although a portion of FR1 is greater than 6 GHz, in some documents and articles, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band. Similarly, in some documents and articles, FR2 is often (interchangeably) referred to as the “millimeter wave” band, although this differs from the Extremely High Frequency (EHF) band (30 GHz to 300 GHz) designated as “millimeter wave” by the International Telecommunication Union (ITU). The frequencies between FR1 and FR2 are generally referred to as the intermediate frequency band, including FR3. Frequency bands falling within FR3 can inherit FR1 or FR2 characteristics, thereby effectively extending the characteristics of FR1 or FR2 into mid-band frequencies. Therefore, "below 6 GHz" (if used herein) can broadly refer to frequencies less than 6 GHz, within FR1, and / or included in mid-band frequencies. Similarly, the term "millimeter wave" (if used herein) can broadly refer to frequencies included in mid-band frequencies, within FR2, FR4, FR4-a, FR4-1, or FR5, and / or within the EHF band. Higher frequency bands can extend 5G NR operation, 6G operation, and / or other RATs above 52.6 GHz. For example, each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band. In some examples, the wireless communication network 100 can implement dynamic spectrum sharing (DSS), where multiple RATs (e.g., 4G / LTE and 5G / NR) are implemented within a single frequency band using dynamic bandwidth allocation (e.g., based on user demand). It is conceivable that the frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1 and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0049] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive auxiliary information related to Tx / Rx mismatch associated with UE 120 from an auxiliary node; obtain one or more Tx / Rx imbalance values ​​associated with UE 120 based on the auxiliary information received from the auxiliary node; estimate an effective uplink channel based on a downlink channel estimate associated with a downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with UE 120; and transmit uplink communication using a pre-decoder associated with the estimated effective uplink channel. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0050] Figure 2 This is a diagram illustrating communication between an example network node 210 and an example UE 220 in a wireless network according to the present disclosure. Figure 2 Network node 210 can be a reference Figure 1 The example described is network node 110. Similarly, UE 220 can be a reference. Figure 1 An example of the described UE 120.

[0051] like Figure 2 As shown, network node 210 may include a data source 212, a transmit processor 214, a transmit (TX) multiple-input multiple-output (MIMO) processor 216, a set of modems 232 (shown as 232a to 232t, where t≥1), a set of antennas 234 (shown as 234a to 234v, where v≥1), a MIMO detector 236, a receive processor 238, a data sink 239, a controller / processor 240, a memory 242, a communication unit 244, a scheduler 246, and / or a communication manager, etc. In some configurations, one or a combination of antennas 234, modems 232, MIMO detectors 236, receive processors 238, transmit processors 214, and / or TX MIMO processors 216 may be included in the transceiver of network node 210. The transceiver may be under the control of and used by a processor (such as controller / processor 240), and in some respects, may perform aspects of the methods, procedures, and / or operations described herein in conjunction with processor-readable code stored in memory 242. In some respects, network node 210 may include one or more interfaces, communication components, and / or other components that facilitate communication with UE 220 or another network node.

[0052] The terms “processor,” “controller,” or “controller / processor” can refer to one or more controllers and / or one or more processors. For example, references to “a / the processor” or “a / the controller / processor” (in the singular form) should be understood as referring to a combination of… Figure 2 The processors described (such as a single processor or a combination of multiple different processors). The reference to "one or more processors" should be understood as referring to a combination of... Figure 2 Any one or more processors described herein. For example, one or more processors of network node 210 may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and / or controller / processor 240. Similarly, one or more processors of UE 220 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and / or controller / processor 280. As used herein, “processor,” “controller,” or “controller / processor” may refer to a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic unit, discrete hardware component, or any combination thereof. A general-purpose processor may be a microprocessor, or any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors incorporating a DSP core, a system-on-a-chip (SoC), or any other such configuration).

[0053] In some aspects, a single processor can be described as capable of performing all operations performed by one or more processors. In some aspects, a first set of processors(one or more) of one or more processors can be described as capable of performing a first function performed by those processors, and a second set of processors(one or more) of one or more processors can be described as capable of performing a second function performed by those processors. The first set of processors and the second set of processors can be the same set of processors or can be different sets of processors. The reference to "one or more memories" should be understood to refer to any one or more memories of the corresponding device, such as combined... Figure 2 The memory described. For example, a function described as being performed by one or more memories can be performed by the same subset of the one or more memories or by different subsets of the one or more memories.

[0054] For downlink communication from network node 210 to UE 220, transmitting processor 214 may receive data (“downlink data”) intended for use by UE 220 (or a set of UEs including UE 220) from data source 212 (such as a data pipeline or data queue). In some examples, transmitting processor 214 may select one or more MCSs for UE 220 based on one or more Channel Quality Indicators (CQIs) received from UE 220. Network node 210 may process the data (e.g., including encoding the data) based on the MCS selected for UE 220 for transmission to UE 220 on the downlink, thereby generating data symbols. Transmitting processor 214 may process system information (e.g., semi-static resource partitioning information (SRPI)) and / or control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and / or control symbols. The transmitting processor 214 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), demodulation reference signals (DMRS), or channel state information (CSI) reference signals (CSI-RS)) and / or synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)).

[0055] The TX MIMO processor 216 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a set of modems 232. For example, each output symbol stream can be provided to a corresponding modulator component (shown as MOD) of modem 232. Each modem 232 can use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for Orthogonal Frequency Division Multiplexing (OFDM)) to obtain an output sample stream. Each modem 232 can further use the corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a time-domain downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) together via a set of corresponding antennas 234.

[0056] Downlink signals may include DCI communication, MAC control element (MAC-CE) communication, RRC communication, downlink reference signals, or another type of downlink communication. Downlink signals may be transmitted on the PDCCH, PDSCH, and / or on another downlink channel. Downlink signals may carry one or more transport blocks (TBs) of data. A TB may be a data unit transmitted via the air interface in the wireless communication network 100. A data stream (e.g., from data source 212) may be encoded into multiple TBs for transmission via the air interface. The number of TBs used to carry data associated with a particular data stream may be associated with a TB size shared by multiple TBs. The TB size may be based on the radio channel conditions of the air interface, the MCS used to encode the data, downlink resources allocated for transmitting data, and / or other parameters, or otherwise associated with them. Generally, a larger TB size allows for a larger amount of data to be transmitted in a single transmission, reducing signaling overhead. However, a larger TB size may be more prone to transmission and / or reception errors than a smaller TB size, but such errors can be mitigated through more robust error correction techniques.

[0057] For uplink communication from UE 220 to network node 210, the uplink signal from UE 220 may be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232, shown as DEMOD), detected where applicable by MIMO detector 236 (e.g., receive (Rx) MIMO processor), and / or further processed by receive processor 238 to obtain decoded data and / or control information. Receive processor 238 may provide the decoded data to data sink 239 (which may be a data pipeline, data queue, and / or another type of data sink) and provide the decoded control information to processors such as controller / processor 240.

[0058] Network node 210 may use scheduler 246 to schedule one or more UEs 220 for downlink or uplink communication. In some aspects, scheduler 246 may use DCI to dynamically schedule DL transmissions to and / or UL transmissions from UE 220. In some examples, scheduler 246 may allocate repetitive time-domain and / or frequency-domain resources that UE 220 may use for transmission and / or reception of communication using RRC configuration (e.g., semi-static configuration), for example, to perform semi-persistent scheduling (SPS) or to configure configuration grant (CG) for UE 220.

[0059] One or more of the following may be included in the RF chain of network node 210: transmit processor 214, TX MIMO processor 216, modem 232, antenna 234, MIMO detector 236, receive processor 238, and / or controller / processor 240. The RF chain may include filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs), and / or other devices for converting analog signals (such as those used for transmission or reception via an air interface) to digital signals (such as those used for processing by one or more processors of network node 210). In some aspects, the RF chain may be a transceiver of network node 210, or may be included in such a transceiver.

[0060] In some examples, network node 210 may use communication unit 244 to communicate with the core network and / or other network nodes. Communication unit 244 may support wired and / or wireless communication protocols and / or connections, such as Ethernet, fiber optic, Common Public Radio Interface (CPRI), and / or wired or wireless backhaul, etc. Network node 210 may use communication unit 244 to send and / or receive data associated with UE 220, or to execute network control signaling, etc. Communication unit 244 may include transceivers and / or interfaces, such as network interfaces.

[0061] UE 220 may include a collection of antennas 252 (shown as antennas 252a to 252r, where r ≥ 1), a collection of modems 254 (shown as modems 254a to 254u, where u ≥ 1), a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, and / or a memory 282, etc. One or more components of UE 220 may be included in housing 284. In some aspects, one or a combination of antennas 252, modems 254, MIMO detector 256, receive processor 258, transmit processor 264, or TX MIMO processor 266 may be included in a transceiver included in UE 220. The transceiver may be under the control of and used by a processor (such as controller / processor 280), and in some aspects, may perform aspects of the methods, processes, or operations described herein in conjunction with processor-readable code stored in memory 282. In some respects, UE 220 may include another interface, another communication component and / or another component that facilitates communication with network node 210 and / or another UE 220.

[0062] For downlink communication from network node 210 to UE 220, the set of antennas 252 can receive downlink communication or signals from network node 210 and can provide a set of received downlink signals (e.g., R received signals) to a set of modems 254. For example, each received signal can be provided to a corresponding demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use the corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the corresponding demodulator component to further demodulate or process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from the set of modems 254, can perform MIMO detection on the received symbols where applicable, and can provide the detected symbols. The receiver processor 258 can process (e.g., decode) the detected symbols, provide the decoded data for the UE 220 to the data sink 260 (such as a data pipeline, data queue and / or an application running on the UE 220), and provide the decoded control information and system information to the controller / processor 280.

[0063] For uplink communication from UE 220 to network node 210, transmitting processor 264 may receive and process data (“uplink data”) from data source 262 (such as data pipelines, data queues, and / or applications running on UE 220) and control information from controller / processor 280. The control information may include one or more parameters, feedback, one or more signal measurements, and / or other types of control information. In some aspects, receiving processor 258 and / or controller / processor 280 may determine one or more parameters related to the transmission of uplink communication for received signals (such as those received from network node 210 or another UE). One or more parameters may include a Reference Signal Received Power (RSRP) parameter, a Received Signal Strength Indicator (RSSI) parameter, a Reference Signal Received Quality (RSRQ) parameter, a CQI parameter, or a Transmit Power Control (TPC) parameter, etc. The control information may include indications of RSRP, RSSI, RSRQ, CQI, TPC, and / or another parameter. Control information can facilitate parameter selection and / or scheduling for UE 220 by network node 210.

[0064] Transmit processor 264 can generate reference symbols for one or more reference signals, such as uplink DMRS, uplink sounding reference signal (SRS), and / or another type of reference signal. Symbols from transmit processor 264 can be pre-decoded by TX MIMO processor 266 (where applicable) and further processed by an assembly of modems 254 (e.g., for DFT-s-OFDM or CP-OFDM). TX MIMO processor 266 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (where applicable) and can provide an assembly of output symbol streams (e.g., R output symbol streams) to the assembly of modems 254. For example, each output symbol stream can be provided to a corresponding modulator component (shown as MOD) of modem 254. Each modem 254 can use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 254 may further use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain an uplink signal.

[0065] Modems 254a to 254r can transmit a set of uplink signals (e.g., R uplink signals) via a set of corresponding antennas 252. Uplink signals may include uplink control information (UCI) communication, MAC-CE communication, RRC communication, or another type of uplink communication. Uplink signals can be transmitted on PUSCH, PUCCH, and / or another type of uplink channel. Uplink signals can carry one or more TBs of data. Sidelink data and control transmission (i.e., transmission directly between two or more UEs 220) typically uses techniques similar to those described for uplink data and control transmission and may use sidelink-specific channels such as the Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), and / or Physical Sidelink Feedback Channel (PSFCH).

[0066] One or more antennas in the set of antennas 252 or the set of antennas 234 may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc., or may be included in one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or with one or more transmitting or receiving components (such as...) Figure 2An antenna module is a combination of one or more antenna elements coupled to one or more components. As used herein, "antenna" can mean one or more antennas, one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, or one or more antenna arrays. "Antenna panel" can mean a group of antennas (such as antenna elements) arranged in an array or panel that can facilitate beamforming by manipulating the parameters of that group of antennas. "Antenna module" can mean a circuit that includes one or more antennas, and may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.

[0067] In some examples, each antenna element of antenna 234 or antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals. For example, a single antenna element may include a first sub-element cross-polarized with a second sub-element, which can be used to independently transmit cross-polarized signals. Antenna elements may include patch antennas, dipole antennas, and / or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern. The spacing between antenna elements can allow signals with a desired wavelength transmitted individually by the antenna elements to interact or interfere (e.g., to form a desired beam) in various directions. For example, given a desired wavelength or frequency range, the spacing may provide a quarter wavelength, half a wavelength, or another fraction of the wavelength between adjacent antenna elements to allow desired constructive and destructive interference modes of signals transmitted by individual antenna elements within that desired range.

[0068] The amplitude and / or phase of signals transmitted via antenna elements and / or sub-elements can be modulated and (e.g., by manipulating phase shifts, phase offsets, and / or amplitudes) shifted relative to each other to generate one or more beams; this is known as beamforming. The term "beam" can refer to the directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction. The term "beam" can also generally refer to the direction associated with such directional signal transmission, the set of directional resources associated with the signal transmission (e.g., angle of arrival, horizontal direction, and / or vertical direction), and / or a set of parameters indicating one or more aspects of the directional signal, the direction associated with the signal, and / or the set of directional resources associated with the signal. In some implementations, antenna elements can be individually selected or deselected for the directional transmission of a signal (or multiple signals) by controlling the amplitude and / or phase of one or more corresponding amplifiers to form one or more beams. The shape of the beam (such as amplitude, width, and / or the presence of sidelobes) and / or the direction of the beam (such as the angle of the beam relative to the surface of the antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and / or amplitudes of multiple signals relative to each other.

[0069] Different UEs 220 or network nodes 110 may include different numbers of antenna elements. For example, UE 220 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or different numbers of antenna elements. As another example, network node 210 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or different numbers of antenna elements. Generally speaking, a larger number of antenna elements provides increased control over the parameters used for beamforming compared to a smaller number of antenna elements, while a smaller number of antenna elements may be less complex to implement and can use less power. Multiple antenna elements can support multi-layer transmission, in which the same time and frequency resources are used to utilize spatial multiplexing to transmit a first layer of communication (which may include a first data stream) and a second layer of communication (which may include a second data stream).

[0070] Network node 210 may provide UE 220 with a configuration of Transmission Configuration Indicator (TCI) states, which indicate or correspond to beams that UE 220 may use for, for example, receiving one or more communications via a physical channel. For example, network node 210 may (e.g., using DCI) indicate an active TCI state to UE 220, which UE 220 may use to generate a beam for receiving one or more communications via a physical channel. The beam indication may be, or may include, TCI state information elements, beam identifier (ID), spatial relation information, TCI state ID, closed-loop index, panel ID, TRP ID, and / or SRS set ID, etc. TCI state information elements (sometimes referred to herein as TCI states) may indicate specific information associated with the beam. For example, TCI status information elements can indicate a TCI status identifier (e.g., tci-StateID), quasi-co-location (QCL) type (e.g., qcl-Type1, qcl-Type2, qcl-TypeA, qcl-TypeB, qcl-TypeC, or qcl-TypeD, etc.), cell identifier (e.g., ServCellIndex), bandwidth portion identifier (bwp-Id), or reference signal identifier (such as CSI-RS identifier (e.g., NZP-CSI-RS-ResourceId or SSB-Index, etc.)). Spatial relationship information can similarly indicate information associated with the uplink beam. Beam indication can be a joint or separate DL / UL beam indication within a unified TCI framework. Within a unified TCI framework, the network can support common TCI status ID updates and activations, which can provide common QCL and / or common UL transmit spatial filters across a set of configured component carriers. This type of beam indication can be applied to in-band CA as well as joint DL / UL beam indication and separate DL / UL beam indication. The Common TCI Status ID can refer to a reference signal determined based on the TCI status indicated by the Common TCI Status ID, which is used to provide QCL Type D indication and to determine the UL transmit space filter across the configured CC set.

[0071] In some examples, the network may use at least a UE-specific (unicast) DCI to indicate a combined or individual DL / UL beam indication selectable from the active TCI state, thereby supporting Layer 1 (L1) based beam indication. In some examples, DCI formats 1_1 and / or 1_2 may be used for beam indication. Network node 210 may include a support mechanism for UE 220 to acknowledge successful decoding of the beam indication. For example, acknowledgment / negation of a PDSCH scheduled by a DCI carrying the beam indication may also be used as acknowledgment for the DCI.

[0072] Further efficiency improvements in throughput, signal strength, and / or other signal properties can be achieved through beam refinement. For example, network node 210 may be able to communicate with UE 220 using beams of various beamwidths. For instance, network node 210 may be configured to utilize a wider beam to communicate with UE 220 when UE 220 is in motion, as wider coverage increases the likelihood that UE 220 will remain within the coverage area of ​​network node 210 while moving. Conversely, when UE 220 is stationary, network node 210 uses a narrower beam to communicate with UE 220, as network node 210 can reliably focus coverage on UE 220, and the likelihood of UE 220 moving out of the coverage area of ​​network node 210 is low or minimal. In some examples, to select a specific beam for communicating with UE 220, network node 210 may transmit reference signals, such as synchronization signal blocks (SSBs) or CSI-RS, in a beam-sweeping manner on each of multiple beams. In some examples, the SSB can be transmitted on a wider beam, while the CSI-RS can be transmitted on a narrower beam. The UE 220 can measure the RSRP or signal-to-interference-plus-noise ratio (SINR) on each of the beams and send a beam measurement report (e.g., an L1 measurement report) to the network node 210 indicating the RSRP or SINR associated with each of one or more of the measured beams. The network node 210 can then select a specific beam for communicating with the UE 220 based on the L1 measurement report. In some other examples, when channel reciprocity exists between the uplink and downlink, the network node 210 can derive a specific beam for communicating with the UE 220 (e.g., on both the uplink and downlink) based on uplink measurements of one or more uplink reference signals (such as SRS) transmitted by the UE 220.

[0073] One enhancement for multi-beam operation at higher carrier frequencies is to facilitate efficient (e.g., low latency and low overhead) downlink and / or uplink beam management operations to support higher Layer 1 and / or Layer 2 (L1 / L2) centered inter-cell mobility. L1 and / or L2 signaling, referred to as “lower-layer” signaling, can be used to activate and / or deactivate candidate cells in a set of cells configured for L1 / L2 mobility, and / or provide reference signals for measurement by UE 220, which can then select candidate beams as target beams for lower-layer handover operations. Therefore, one objective of L1 / L2 centered inter-cell mobility is to enable UEs to perform cell handover via dynamic control signaling at lower layers (e.g., DCI for L1 signaling or MAC CE for L2 signaling) instead of semi-static Layer 3 (L3) RRC signaling, in order to reduce latency, lower overhead, and / or otherwise improve the efficiency of cell handover.

[0074] In some examples, for UE 220, one antenna panel can be used for UL transmission and another for DL ​​reception. In some examples, full-duplex communication can be conditional on beam separation of the UL and DL beams at the respective antenna panels. Utilizing full-duplex communication can reduce latency, making it possible to receive DL signals in UL-only time slots, thus achieving latency savings. Furthermore, full-duplex communication can enhance spectral efficiency per cell or per UE 220 and enable more efficient resource utilization. Beam separation of the UL and DL beams helps limit or reduce self-interference that may occur during full-duplex communication. Separating the UL and DL beams on their respective antenna panels can provide reliable full-duplex communication by minimizing or reducing self-interference.

[0075] Full-duplex UE 220 can perform a self-interference measurement (SIM) procedure to identify self-interference from transmissions of full-duplex UE 220. Full-duplex network node 210 can also perform a SIM procedure to identify self-interference from transmissions of full-duplex network node 210. UE 220 can provide a measurement report to network node 210 to indicate the results of the UE SIM. Network node 210 can select multiple beam pairs (referred to herein as "beam pairs") for use during full-duplex communication for UE 220 ("UE beam pair") and network node 210 ("network node beam pair"). Beam pairs typically include receive (Rx) beams and transmit (Tx) beams, such as DL beams and UL beams for UE 220, and similarly, UL beams and DL beams for network node 210.

[0076] The controller / processor 240 of network node 110 and network node 210, and the controller / processor 280 of UE 120 and UE 220 or Figure 1 or Figure 2 Any other component may implement one or more techniques or perform one or more operations associated with UE Tx / Rx calibration using auxiliary information in TDD, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 210, the controller / processor 280 of UE 220, Figure 2 Any other component may (alone or in combination with one or more other processors) perform or direct, for example Figure 5 The operation of process 500 or other processes as described herein. Memory 242 may store data and program code of network node 110 or network node 210. Memory 282 may store data and program code of UE 120 or UE 220. In some examples, memory 242 or memory 282 may include a non-transitory computer-readable medium storing instruction sets (e.g., code or program code) for wireless communication. Memory 242 may include one or more memories, such as a single memory (of the same type or different types) or multiple different memories. Memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same type or different types). For example, the instruction set may be executed by one or more processors of network node 210 or UE 220 (e.g., directly, or after compilation, transformation, or interpretation). Figure 5 The process may be 500 or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0077] In some aspects, UE 120 includes components for receiving auxiliary information related to Tx / Rx mismatch associated with UE 120 from an auxiliary node; components for obtaining one or more Tx / Rx imbalance values ​​associated with UE 120 based on the auxiliary information received from the auxiliary node; components for estimating an effective uplink channel based on a downlink channel associated with a downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with UE 120; and / or components for transmitting uplink communication using a pre-decoder associated with the estimated effective uplink channel. Components enabling UE 120 to perform the operations described herein may include, for example, one or more of the following: a communication manager 140, 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.

[0078] Figures 3A to 3B These are illustrations of examples 300A and 300B related to UE Tx / Rx calibration using auxiliary information in a TDD system, according to this disclosure. Figures 3A to 3B As shown, Examples 300A and 300B include communication between an auxiliary node 310 and a UE 320. In some aspects, the auxiliary node 310 and the UE 320 may be included in a wireless network (such as wireless communication network 100). In some aspects, the auxiliary node 310 may be a network node communicating with the UE 320 via a wireless access link, which may include an uplink and a downlink. Additionally or alternatively, the auxiliary node 310 may be a UE communicating with the UE 320 via a wireless sidelink.

[0079] As described in this paper, in TDD systems, channel reciprocity typically refers to the property of wireless (air) communication channels where uplink and downlink channels experience similar propagation characteristics in both communication directions. For example, because uplink and downlink channels share the same physical medium and propagation environment, the channel conditions observed in the uplink direction (from UE to network node) are highly correlated with the channel conditions observed in the downlink direction (from network node to UE). For instance, in a TDD system, the downlink channel can be represented as... The uplink channel can be represented as Furthermore, the channel reciprocity property provides ,in and , where M is the number of antennas at the network node and N is the number of antennas at the UE.

[0080] Channel reciprocity plays a crucial role in improving the efficient use of resources in TDD systems because information received in uplink transmissions can be used to perform channel estimation and equalization in the downlink direction (and vice versa), and this information can then be used to optimize transmissions in the downlink direction (and vice versa). For example, channel reciprocity properties can be used to implement reciprocity-based beamforming and / or pre-decoding in TDD-based MIMO systems. For instance, in the downlink direction, a network node can receive SRS from the UE, which can be used to obtain... Assume that the uplink and downlink channels are reciprocal. Network nodes can be based on This is used to obtain pre-decoding for one or more downlink transmissions (e.g., PDSCH transmissions or CSI-RS transmissions). Similarly, in the uplink direction, the UE can receive CSI-RS from the network node, which the UE can use to obtain... Assume that the uplink and downlink channels are reciprocal. ), then the UE can be based on This is used to obtain pre-decoding for one or more uplink transmissions (e.g., PUSCH transmissions or SRS transmissions). Furthermore, channel reciprocity can be similarly applied to TDD-based sidelink communication between UEs.

[0081] However, in practice, each node communicating via a wireless channel in a TDD system (e.g., a network node and a UE, or a first UE and a second UE) introduces transmit / receive (Tx / Rx) mismatches (such as amplitude and phase perturbations) into the signals transmitted and received via the wireless channel. Therefore, despite the fact that the propagation channel is reciprocal, the components included in the transceiver RF chain (e.g., power amplifiers, low-noise amplifiers, and / or RF mixers and filters, etc.) are typically not identical in the Tx and Rx branches. The differences between components in the Tx and Rx branches cause differences between the Tx and Rx responses, or Tx / Rx mismatch, thus potentially making the effective downlink and uplink channels between any two given antennas non-reciprocal.

[0082] For example, when a Tx / Rx mismatch exists at a network node or UE, the Tx / Rx mismatch can be expressed as: ,in Indicates a valid downlink channel, and This indicates a valid uplink channel. In this case, the Tx / Rx mismatch at the network node is expressed by the expression... It means that among them This indicates an imbalance in the Tx chain at a network node, which includes gain and / or phase imbalance at the network node's Tx chain and errors in transmission power. It is a diagonal matrix of M Tx antennas at a network node. Furthermore, the terminology... This indicates an imbalance in the Rx chain at a network node, which includes gain and / or phase imbalance at the Rx chain of the network node, as well as gain and / or phase errors in automatic gain control (AGC). It is a diagonal matrix of M Rx antennas at the network node, and the Tx / RX imbalance at the network node is given by the expression express.

[0083] In a similar respect, the Tx / Rx mismatch at the UE is determined by the expression It means that among them This indicates a Tx chain imbalance at the UE, which includes gain and / or phase imbalance at the UE's Tx chain and errors in transmit power. It is a diagonal matrix of N Tx antennas at the UE. Furthermore, the terminology... This indicates an Rx chain imbalance at the UE, which includes gain and / or phase imbalance at the UE's Rx chain and gain and / or phase error in AGC. It is the diagonal matrix of the N Rx antennas at the UE, and the Tx / RX imbalance at the UE node is given by the expression express.

[0084] Therefore, in some cases, Tx / Rx calibration may need to be performed in a TDD system. For example, Tx / Rx calibration may include techniques for measuring the effective imbalance between Tx and Rx antennas and compensating for this imbalance when selecting or configuring a pre-decoder. In other words, Tx / Rx calibration techniques can be used to make the effective downlink and uplink channels (or transmit and receive channels) reciprocal in a TDD system, allowing transmitters (e.g., network nodes for downlink, or UEs for uplink or sidelink) to acquire the channel based on the received reference signal and derive the pre-decoding based on the acquired channel. However, Tx / Rx calibration is typically only needed at the transmitter (where pre-decoding is applied) and may be unnecessary at the receiver side. For example, in the downlink direction, where the network node is transmitting PDSCH or CSI-RS to the UE using pre-decoding based on SRS received from the UE, Tx / Rx calibration is only relevant at the network node. In such cases, the network node can multiply the received version of the SRS by the imbalance matrix. The network node can obtain the downlink channel and the appropriate downlink pre-decoder from this. Similarly, in the uplink direction, when the UE is transmitting PUSCH or SRS using pre-decoded CSI-RS received from the network node, Tx / Rx calibration is only relevant at the UE. In such cases, the UE can multiply the received version of the CSI-RS by the imbalance matrix. The UE can obtain the uplink channel and the appropriate uplink pre-decoder from it.

[0085] In some cases, network nodes may have the capability to perform self-calibration using additional hardware, such as extra antennas used by the network node to calibrate the antenna array. Additionally or alternatively, network nodes may perform over-the-air calibration, where one or more auxiliary nodes (e.g., other network nodes or UEs) provide information that the network node can use to obtain one or more Tx / Rx imbalance values ​​(e.g., imbalance matrix). Self-calibration provides auxiliary information. However, due to the need for additional hardware, it is difficult or impractical for the UE. Furthermore, wireless networks currently lack support for over-the-air techniques to perform Tx / Rx calibration at the UE.

[0086] Therefore, some aspects described herein generally relate to over-the-air techniques for performing Tx / Rx calibration at UE 320 using auxiliary information provided by auxiliary node 310 (e.g., a network node communicating with UE 320 via an access link or a neighboring UE communicating with UE 320 via a side link). Some aspects more specifically relate to techniques that enable the UE to obtain one or more Tx / Rx imbalance values. For example, in some aspects, the over-the-air techniques described herein enable the UE 320 to obtain a Tx / Rx imbalance matrix containing one or more Tx / Rx imbalance values. Additionally or alternatively, the dimension of the Tx / Rx imbalance matrix (or the number of values ​​included in the Tx / Rx imbalance matrix) may correspond to the number of antennas at UE 320, and each Tx / Rx imbalance value may be a complex value including a gain imbalance component and a phase imbalance component. For example, in Figure 3A In Example 300A, a first method is described including a Tx / Rx mismatch calibration phase 330, in which the UE 320 uses auxiliary information provided by the auxiliary node 310 to calculate the Tx / RX imbalance matrix. Alternatively, in Figure 3B In Example 300B, a second method is described, including a Tx / Rx mismatch calibration phase 340, in which auxiliary node 310 calculates the Tx / RX imbalance matrix. Thus, the auxiliary information provided by the auxiliary node 310 to the UE 320 indicates the Tx / RX imbalance matrix. In either method, a reciprocity-based MIMO operation 350 is performed after the Tx / Rx calibration phase 330 / 340.

[0087] More specifically, see reference Figure 3A The Tx / Rx calibration phase 330 includes a first operation 332, in which the UE 320 sends a reference signal, such as an SRS, to the auxiliary node 310. The SRS can be received by the auxiliary node 310 and can be represented as ,in The problem is a mismatch on the receiver side at auxiliary node 310. It is the uplink (or sidelink) channel on which SRS is transmitted. It is a mismatch on the transmitting side at UE 320, and It is additive noise. For example... Figure 3A As further shown, the Tx / Rx calibration phase 330 includes a second operation 334, in which the auxiliary node 310 sends auxiliary information back to the UE 320, wherein the auxiliary information may include the received version of the SRS. Or estimation of effective uplink channel The received version of the SRS or the estimate of the effective uplink channel may be carried in the PDSCH transmission if the auxiliary node 310 is a network node, or in the PSSCH transmission if the auxiliary node 310 is a UE. In some aspects, the auxiliary information may be included in a MAC-CE or Protocol Data Unit (PDU) having a header indicating that the payload of the MAC-CE or PDU carries auxiliary information indicating the received version of the SRS or the estimated effective uplink channel. Figure 3A As further shown, the Tx / Rx calibration phase 330 includes a third operation 336, in which the auxiliary node 310 sends a reference signal, such as CSI-RS, to the UE 320, enabling the UE 320 to estimate the effective downlink channel. For example, the CSI-RS can be received by the UE 320 and can be represented as... ,in The problem is a mismatch on the receiver side at UE 320. It transmits CSI-RS downlink (or sidelink) channels on it. The problem is a mismatch on the transmitting side at auxiliary node 310, and... It is additive noise. At this point, UE 320 has access to estimates of both the effective uplink channel (or transmit channel) and the effective downlink channel (or receive channel). Therefore, in the fourth operation 338, UE 320 can base its calculations on the receive version of CSI-RS. The imbalance matrix is ​​calculated using the valid uplink channels indicated in the auxiliary information provided by auxiliary node 310. .

[0088] alternative locations, for reference Figure 3B The Tx / Rx calibration phase 340 includes a first operation 341, in which the auxiliary node 310 sends a reference signal, such as CSI-RS, to the UE 320. The CSI-RS can be received by the UE 320 and can be represented as... ,in The problem is a mismatch on the receiver side at UE 320. It is the downlink (or transmission) channel on which CSI-RS is transmitted. The problem is a mismatch on the transmitting side at auxiliary node 310, and... It is additive noise. For example... Figure 3B As further shown, the Tx / Rx calibration phase 340 includes a second operation 343, in which the UE 320 sends feedback to the auxiliary node 310, wherein the feedback may include the received version of CSI-RS. Or, the estimation of the effective downlink channel. The received version of the CSI-RS or the estimate of the effective downlink channel may be carried in the PUSCH transmission if the auxiliary node 310 is a network node, or in the PSSCH transmission if the auxiliary node 310 is a UE. In some aspects, this feedback may be included in a MAC-CE or PDU having a header indicating that the payload of the MAC-CE or PDU carries feedback indicating the received version of the CSI-RS or the estimated effective downlink channel. Figure 3B As further shown, the Tx / Rx calibration phase 340 includes a third operation 345, in which the UE 320 sends a reference signal, such as an SRS, to the auxiliary node 310, enabling the auxiliary node 310 to estimate the effective uplink channel. For example, the SRS may be received by the auxiliary node 310 and may be represented as... ,in The problem is a mismatch on the receiver side at auxiliary node 310. It is the uplink (or sidelink) channel on which SRS is transmitted. It is a mismatch on the transmitting side at UE 320, and It is additive noise. At this point, auxiliary node 310 has access to estimate both the effective uplink channel and the effective downlink channel. Therefore, in the fourth operation 347, auxiliary node 310 can estimate based on the received version of SRS. The imbalance matrix is ​​calculated using the valid downlink channels indicated in the feedback provided by UE 320. In the fifth operation 349, the auxiliary node 310 may then indicate the Tx / Rx imbalance matrix to the UE 320 within a MAC-CE or PDU (e.g., in the PDSCH if the auxiliary node 310 is a network node or in the PSSCH transmission if the auxiliary node 310 is a UE), the MAC-CE or PDU having a header indicating that the payload indicates the Tx / Rx imbalance matrix.

[0089] refer to Figure 3A and Figure 3B UE 320 can then obtain the imbalance matrix. Then, conventional reciprocity-based MIMO operation 350 is performed. For example, in the first operation 352, the auxiliary node 310 may send CSI-RS or other reference signals to the UE 320. In the second operation 354, the UE 320 may estimate the downlink channel from the auxiliary node 310 based on the received reference signals, and may estimate the effective uplink channel to the auxiliary node 310 based on the downlink channel estimate based on the received reference signals and the imbalance matrix obtained during the Tx / Rx calibration phases 330 / 340. The UE 320 may then determine the pre-decoding for transmission (e.g., PUSCH, PSSCH, or SRS) based on the downlink channel estimate based on the received reference signals and the imbalance matrix obtained during the Tx / Rx calibration phases 330 / 340. Figures 3A to 3B As further shown, in the third operation 356, the UE 320 may use pre-decoding to send a signal to the auxiliary node 310, which is selected based on the estimation of the downlink channel according to the received reference signal and the imbalance matrix obtained during the Tx / Rx calibration phases 330 / 340.

[0090] In some respects, in addition to calibrating the Tx / Rx mismatch at UE 320, some aspects described herein can also be used to jointly calibrate the Tx / Rx mismatch at auxiliary node 310. For example, some aspects can be used to obtain the Tx / Rx imbalance matrix associated with auxiliary node 310. This allows auxiliary node 310 to use the Tx / Rx imbalance matrix. Subsequent MIMO transmissions to UE 320 can be performed using pre-decoding based on reciprocity attributes (e.g., based on SRS transmissions made by UE 320). For example, in Figure 3A The method shown is used to calibrate the Tx / Rx mismatch at UE 320 (e.g., when calculating the Tx / Rx imbalance matrix at UE 320). In the case of (the UE 320), the UE 320 can also calculate the Tx / Rx imbalance matrix associated with the auxiliary node 310, which can be expressed as The Tx / Rx imbalance matrix associated with the auxiliary node 310 is then transmitted via PUSCH (e.g., when the auxiliary node 310 is a network node) or PSSCH (e.g., when the auxiliary node 310 is a UE). In such cases, a MAC-CE or PDU with a known header can be used to indicate the Tx / Rx imbalance matrix associated with the auxiliary node 310, and the additional calculation of the Tx / Rx imbalance matrix associated with the auxiliary node 310 may depend on the capabilities of the UE 320 and / or be configured separately by the auxiliary node 310. For example, in some aspects, where the auxiliary node 310 supports self-calibration, the auxiliary node 310 may avoid configuring the UE 320 to calculate the Tx / Rx imbalance matrix associated with the auxiliary node 310, or the UE 320 may be configured to calculate the Tx / Rx imbalance matrix associated with the auxiliary node 310 less frequently compared to calibrating the Tx / Rx mismatch associated with the UE 320. Additionally or alternatively, in Figure 3B The method shown is used to calibrate the Tx / Rx mismatch at UE 320 (e.g., calculating the Tx / Rx imbalance matrix at auxiliary node 310). (And if the Tx / Rx imbalance matrix is ​​indicated to UE 320), the auxiliary node can further calculate the Tx / Rx imbalance matrix associated with the auxiliary node 310 in a transparent manner to UE 320. .

[0091] Figure 4 This is an illustration of example 400 associated with UE Tx / Rx calibration using auxiliary information in a TDD system, according to this disclosure. Figure 4 As shown, Example 400 includes communication between an auxiliary node 410 and a UE 420. In some aspects, the auxiliary node 410 and the UE 420 may be included in a wireless network (such as wireless communication network 100). In some aspects, the auxiliary node 410 may be a network node communicating with the UE 420 via a wireless access link, which may include an uplink and a downlink. Additionally or alternatively, the auxiliary node 410 may be a UE communicating with the UE 420 via a wireless sidelink.

[0092] like Figure 4As shown, in the first operation 430, UE 420 may send capability information related to calibrating the Tx / Rx mismatch of UE 420 to auxiliary node 410. For example, as described herein, calibrating the Tx / Rx mismatch of UE 420 can be costly and therefore cannot be performed very frequently, regardless of whether the Tx / Rx imbalance matrix is ​​calculated by UE 420 or auxiliary node 410. However, once the Tx / Rx mismatch of UE 420 has been calibrated, the Tx / Rx imbalance matrix of UE 420 can be used to enable reciprocity-based MIMO operation for a relatively long period of time (e.g., any time from minutes to hours, depending on temperature variations that may alter the RF transceiver (Tx / Rx) response) before recalibration is required. In some cases, the frequency at which UE 420 needs to perform Tx / Rx mismatch calibration can depend on various factors, including the configuration of the Tx and Rx chains of UE 420. Therefore, UE 420 can send capability information to auxiliary node 410 to indicate the frequency at which UE 420 needs to perform Tx / Rx mismatch calibration. Furthermore, the ability to maintain a relative Tx / Rx imbalance over a period of time may be an advanced capability not universally supported by all UEs. Therefore, in some aspects, UE 420 instructs itself, via capability signaling or UE auxiliary information, that it is capable of performing one or more Tx / Rx mismatch calibration techniques, and thus able to maintain a relative Tx / Rx imbalance over a period of time. This applies when auxiliary node 410 supports two Tx / Rx mismatch calibration techniques (e.g., as referenced above). Figures 3A to 3B As described, the capability information can further indicate whether UE 420 supports the first method for calculating the Tx / Rx imbalance matrix, the second method for calculating the Tx / Rx imbalance matrix by the auxiliary node 410, or both methods. Furthermore, in some respects, the capability information can indicate how frequently the Tx / Rx calibration process is performed.

[0093] like Figure 4As further shown, in the second operation 440, the auxiliary node 410 can configure the UE 420 to perform Tx / Rx calibration via RRC signaling. For example, if the auxiliary node 410 supports two Tx / Rx mismatch calibration techniques, the RRC configuration can indicate whether it is the first technique or the second technique based on the capabilities of the UE 420 (e.g., if the UE 420 only supports the first technique, the RRC configuration can enable only the first technique). Furthermore, in some aspects, the RRC configuration can semi-statically configure the CSI-RS and / or SRS for Tx / Rx mismatch calibration, or the CSI-RS and / or SRS for Tx / Rx mismatch calibration can be dynamically triggered (e.g., using Layer 1 (L1) signaling, such as DCI, or Layer 2 (L2) signaling, such as MAC-CE). Additionally, the CSI-RS for Tx / Rx mismatch calibration can be configured with a specific purpose (e.g., "Tx / Rx calibration"), such that the UE 420 is configured to use the received signals for Tx / Rx calibration. Additionally or alternatively, in the third operation 450, the UE 420 may dynamically indicate (using L1 / L2 signaling) a request to perform Tx / Rx calibration by sending a UCI on the PUCCH or PUSCH or by sending a MAC-CE on the PUSCH. Figure 4 As shown, in the fourth operation 460, the UE 420 and the auxiliary node 410 can communicate to perform Tx / Rx mismatch calibration (e.g., based on RRC configuration or dynamic request), which can use the above reference. Figures 3A to 3B One or more of the described techniques may be used to perform this operation. In the fifth operation 470, the auxiliary node 410 and the UE 420 may perform a reciprocity-based MIMO operation, wherein the UE 420 uses its Tx / Rx imbalance matrix and a channel estimate associated with a reference signal received from the auxiliary node 410 to select a pre-decoder to be applied to the transmission to the auxiliary node 410.

[0094] Figure 5 This is a flowchart illustrating an example process 500 performed, for example, at a UE or a device of a UE, according to this disclosure. Example process 500 is an example in which a device or UE (e.g., UE 120, UE 320, and / or UE 420) uses auxiliary information in TDD to perform operations associated with UE Tx / Rx calibration.

[0095] like Figure 5 As shown, in some aspects, process 500 may include receiving auxiliary information (box 510) related to transmit / receive (Tx / Rx) mismatch associated with the UE from an auxiliary node. For example, the UE (such as by using...) Figure 6The communication manager 140 or receiving component 602 depicted above can receive auxiliary information related to Tx / Rx mismatch associated with the UE from the auxiliary node.

[0096] like Figure 5 As further shown, in some aspects, process 500 may include obtaining one or more Tx / Rx imbalance values ​​associated with the UE based on auxiliary information received from the auxiliary node (box 520). For example, the UE (such as by using...) Figure 6 The communication manager 140 or Tx / Rx calibration component 608 depicted above can obtain one or more Tx / Rx imbalance values ​​associated with the UE based on auxiliary information received from the auxiliary node.

[0097] like Figure 5 Further shown, in some aspects, process 500 may include estimating the effective uplink channel based on a downlink channel associated with a downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with the UE (box 530). For example, the UE (such as by using...) Figure 6 The communication manager 140 or Tx / Rx calibration component 608 depicted above can estimate the effective uplink channel based on the downlink channel estimated according to the downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with the UE, as described above.

[0098] like Figure 5 As further shown, in some aspects, process 500 may include transmitting uplink communication using a pre-decoder associated with the estimated effective uplink channel (box 540). For example, a UE (such as by using...) Figure 6 The communication manager 140 or transmitting component 604 depicted above may use a pre-decoder associated with the estimated effective uplink channel to transmit uplink communication, as described above.

[0099] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below or in conjunction with one or more other processes described elsewhere in this document.

[0100] In a first additional aspect, process 500 includes: sending an SRS to the auxiliary node, wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the version of the SRS received by the auxiliary node or an estimate of the effective uplink channel based on the version of the SRS received by the auxiliary node.

[0101] In a second additional aspect, either alone or in combination with the first aspect, process 500 includes: receiving CSI-RS from the auxiliary node, wherein obtaining the one or more Tx / Rx imbalance values ​​associated with the UE includes calculating the one or more Tx / Rx imbalance values ​​based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node.

[0102] In a third additional aspect, either alone or in combination with one or more of the first and second aspects, process 500 includes: estimating one or more Tx / Rx imbalance values ​​associated with the auxiliary node based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node; and sending feedback to the auxiliary node indicating one or more estimated Tx / Rx imbalance values ​​associated with the auxiliary node.

[0103] In a fourth additional aspect, either alone or in combination with one or more of the first to third aspects, process 500 includes: receiving a CSI-RS from the auxiliary node; sending to the auxiliary node feedback indicating the version of the received CSI-RS or an estimate of the effective downlink channel associated with the version of the received CSI-RS; and sending to the auxiliary node an SRS, wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the one or more Tx / Rx imbalance values ​​based on the feedback and the version of the SRS received by the auxiliary node.

[0104] In the fifth additional aspect, either alone or in combination with one or more of the first to fourth aspects, the feedback is carried in a MAC-CE or PDU with a header associated with calibrating the one or more Tx / Rx imbalance values.

[0105] In the sixth additional aspect, the feedback and the SRS are sent to the auxiliary node, either alone or in combination with one or more of the first to fifth aspects, so that the auxiliary node can obtain one or more Tx / Rx imbalance values ​​associated with the auxiliary node.

[0106] In the seventh additional aspect, either alone or in combination with one or more of the first to sixth aspects, the auxiliary information is carried in a MAC-CE or PDU with a header associated with calibrating the one or more Tx / Rx imbalance values.

[0107] In the eighth additional aspect, either alone or in combination with one or more of the first to seventh aspects, process 500 includes: sending information to the auxiliary node indicating the ability to calibrate the Tx / Rx mismatch associated with the UE.

[0108] In the ninth additional aspect, the information sent to the auxiliary node, either alone or in combination with one or more of the first to eighth aspects, indicates one or more Tx / Rx calibration procedures supported by the UE.

[0109] In the tenth additional aspect, the information sent to the auxiliary node, either alone or in combination with one or more of the first to ninth aspects, indicates the periodicity of performing one or more Tx / Rx calibration processes.

[0110] In the eleventh additional aspect, either alone or in combination with one or more of the first to tenth aspects, process 500 includes: sending L1 / L2 signaling to the auxiliary node, the L1 / L2 signaling including a request to calibrate the Tx / Rx mismatch associated with the UE.

[0111] In the twelfth additional aspect, either alone or in combination with one or more of the first to eleventh aspects, process 500 includes: receiving RRC signaling from the auxiliary node, the RRC signaling including configuration information for calibrating the Tx / Rx mismatch associated with the UE.

[0112] In the thirteenth additional aspect, alone or in combination with one or more of the first to twelfth aspects, the auxiliary node is an auxiliary network node that communicates with the UE via an access link or an auxiliary UE that communicates with the UE via a side link.

[0113] although Figure 5 An example box of process 500 is shown, but in some respects, process 500 may include... Figure 5 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 500 may be executed in parallel.

[0114] Figure 6 This is a diagram of an example device 600 for wireless communication that supports UE Tx / Rx calibration using auxiliary information in TDD, according to the present disclosure. Device 600 may be a UE, or a UE may include device 600. In some aspects, device 600 includes a receiving component 602, a transmitting component 604, and a communication manager 140 that can communicate with each other (e.g., via one or more buses). As shown, device 600 can use the receiving component 602 and the transmitting component 604 to communicate with another device 606 (such as a UE, a network node, or another wireless communication device).

[0115] In some respects, device 600 may be configured and / or operable to perform the functions described herein. Figures 3A to 3B and Figure 4One or more operations described herein. Additionally or alternatively, device 600 may be configured and / or operable to perform one or more processes described herein, such as Figure 5 The process 500. In some aspects, the apparatus 600 may include the above-described combination. Figure 2 One or more components of the UE as described.

[0116] Receiver 602 may receive communications from device 606, such as reference signals, control information, and / or data communications. Receiver 602 may provide the received communications to one or more other components of device 600, such as communication manager 140. In some aspects, receiver 602 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components. In some aspects, receiver 602 may include the combinations described above. Figure 2 The described UE includes one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, and / or one or more memories.

[0117] The transmitting component 604 can transmit communications, such as reference signals, control information, and / or data communications, to the device 606. In some aspects, the communication manager 140 can generate communications and send the generated communications to the transmitting component 604 for transmission to the device 606. In some aspects, the transmitting component 604 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and send the processed signals to the device 606. In some aspects, the transmitting component 604 may include the elements described above. Figure 2 The described UE includes one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, and / or one or more memories. In some aspects, the transmit component 604 may co-located with the receive component 602 in one or more transceivers.

[0118] Communication manager 140 may receive, or may cause receiving component 602 to receive, auxiliary information related to Tx / Rx associated with the UE from an auxiliary node. Communication manager 140 may obtain one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the auxiliary node. Communication manager 140 may estimate an effective uplink channel based on a downlink channel estimated based on a downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with the UE. Communication manager 140 may transmit, or may cause transmitting component 604 to transmit uplink communication using a pre-decoder associated with the estimated effective uplink channel. In some aspects, communication manager 140 may perform one or more operations as described elsewhere herein by one or more components of communication manager 140.

[0119] Communication manager 140 may include the above-mentioned components. Figure 2 The described UE includes one or more controllers / processors and / or one or more memories. In some aspects, the communication manager 140 includes a set of components such as a Tx / Rx calibration component 608. Alternatively, this set of components may be separate from and distinct from the communication manager 140. In some aspects, one or more components in this set of components may include those described above. Figure 2 The described UE may have one or more controllers / processors and / or one or more memories, or may be implemented therein. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and may be executed by one or more controllers or one or more processors to perform the function or operation of the component.

[0120] The receiving component 602 can receive auxiliary information related to Tx / Rx mismatch associated with the UE from the auxiliary node. The Tx / Rx calibration component 608 can obtain one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the auxiliary node. The Tx / Rx calibration component 608 can estimate the effective uplink channel based on the downlink channel estimation associated with the downlink reference signal and based on one or more Tx / Rx imbalance values ​​associated with the UE. The transmitting component 604 can transmit uplink communication using a pre-decoder associated with the estimated effective uplink channel.

[0121] The transmitting component 604 can transmit an SRS to the auxiliary node, wherein auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the version of the SRS received by the auxiliary node or an estimate of the effective uplink channel based on the version of the SRS received by the auxiliary node.

[0122] The receiving component 602 can receive CSI-RS from the auxiliary node, wherein obtaining one or more Tx / Rx imbalance values ​​associated with the UE includes calculating one or more Tx / Rx imbalance values ​​based on the received version of the CSI-RS and auxiliary information received from the auxiliary node.

[0123] The Tx / Rx calibration component 608 can estimate one or more Tx / Rx imbalance values ​​associated with the auxiliary node based on the received version of CSI-RS and auxiliary information received from the auxiliary node. The transmitting component 604 can send feedback to the auxiliary node indicating one or more estimated Tx / Rx imbalance values ​​associated with the auxiliary node.

[0124] The receiving component 602 may receive CSI-RS from the auxiliary node. The transmitting component 604 may transmit to the auxiliary node feedback indicating the version of the received CSI-RS or an estimate of the effective downlink channel associated with the version of the received CSI-RS. The transmitting component 604 may transmit SRS to the auxiliary node, wherein auxiliary information related to Tx / Rx mismatch associated with the UE indicates one or more Tx / Rx imbalance values ​​based on the feedback and the version of the SRS received by the auxiliary node.

[0125] The transmitting component 604 can send information to the auxiliary node indicating the ability to calibrate the Tx / Rx mismatch associated with the UE.

[0126] The transmitting component 604 can send L1 / L2 signaling to the auxiliary node, which includes a request to calibrate the Tx / Rx mismatch associated with the UE.

[0127] The receiving component 602 can receive RRC signaling from the auxiliary node, which includes configuration information for calibrating Tx / Rx mismatches associated with the UE.

[0128] Figure 6 The number and arrangement of components shown are provided as an example. In practice, different arrangements may exist. Figure 6 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 6 The two or more components shown can be implemented within a single component, or Figure 6 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 6 The collection of (one or more) components shown can be executed as described by Figure 6 The other set of components shown performs one or more functions.

[0129] The following provides an overview of some aspects of this disclosure:

[0130] Aspect 1: A method for wireless communication by a UE, the method comprising: receiving auxiliary information related to a Tx / Rx mismatch associated with the UE from an auxiliary node; obtaining one or more Tx / Rx imbalance values ​​associated with the UE based on the auxiliary information received from the auxiliary node; estimating an effective uplink channel based on a downlink channel estimation associated with a downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE; and transmitting uplink communication using a pre-decoder associated with the estimated effective uplink channel.

[0131] Aspect 2: According to the method of aspect 1, the method further includes: sending an SRS to the auxiliary node, wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the version of the SRS received by the auxiliary node or an estimate of the effective uplink channel based on the version of the SRS received by the auxiliary node.

[0132] Aspect 3: According to the method of aspect 2, the method further includes: receiving CSI-RS from the auxiliary node, wherein obtaining the one or more Tx / Rx imbalance values ​​associated with the UE includes calculating the one or more Tx / Rx imbalance values ​​based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node.

[0133] Aspect 4: The method according to aspect 3, the method further comprising: estimating the one or more Tx / Rx imbalance values ​​associated with the auxiliary node based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node; and sending feedback to the auxiliary node indicating the one or more estimated Tx / Rx imbalance values ​​associated with the auxiliary node.

[0134] Aspect 5: The method according to any one of Aspects 1 to 4, the method further comprising: receiving a CSI-RS from the auxiliary node; sending to the auxiliary node feedback indicating a version of the received CSI-RS or an estimate of an effective downlink channel associated with the version of the received CSI-RS; and sending an SRS to the auxiliary node, wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the one or more Tx / Rx imbalance values ​​according to the feedback and the version of the SRS received by the auxiliary node.

[0135] Aspect 6: According to the method of aspect 5, the feedback is carried in a MAC-CE or PDU having a header associated with calibrating the one or more Tx / Rx imbalance values.

[0136] Aspect 7: According to the method of aspect 5, wherein sending the feedback and the SRS to the auxiliary node enables the auxiliary node to obtain one or more Tx / Rx imbalance values ​​associated with the auxiliary node.

[0137] Aspect 8: The method according to any one of Aspects 1 to 7, wherein the auxiliary information is carried in a MAC-CE or PDU having a header associated with calibrating the one or more Tx / Rx imbalance values.

[0138] Aspect 9: The method according to any one of Aspects 1 to 8, the method further comprising: sending information to the auxiliary node indicating the ability to calibrate the Tx / Rx mismatch associated with the UE.

[0139] Aspect 10: The method according to aspect 9, wherein the information sent to the auxiliary node indicates one or more Tx / Rx calibration procedures supported by the UE.

[0140] Aspect 11: According to the method of aspect 9, wherein the information sent to the auxiliary node indicates the periodicity of performing one or more Tx / Rx calibration processes.

[0141] Aspect 12: The method according to any one of Aspects 1 to 11, the method further comprising: sending L1 / L2 signaling to the auxiliary node, the L1 / L2 signaling including a request to calibrate the Tx / Rx mismatch associated with the UE.

[0142] Aspect 13: The method according to any one of Aspects 1 to 12, the method further comprising: receiving RRC signaling from the auxiliary node, the RRC signaling including configuration information for calibrating the Tx / Rx mismatch associated with the UE.

[0143] Aspect 14: The method according to any one of Aspects 1 to 13, wherein the auxiliary node is an auxiliary network node communicating with the UE via an access link or an auxiliary UE communicating with the UE via a side link.

[0144] Aspect 15: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 1 to 14.

[0145] Aspect 16: An apparatus for wireless communication at a device, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 1 to 14.

[0146] Aspect 17: 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 14.

[0147] Aspect 18: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by one or more processors to perform the methods described in one or more of aspects 1 to 14.

[0148] Aspect 19: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including, when executed by one or more processors of a device, causing the device to perform one or more of the methods described in one or more of aspects 1 to 14.

[0149] Aspect 20: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 1 to 14.

[0150] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations can be made based on the foregoing disclosure, or from various aspects of practice.

[0151] As used herein, the term "component" is intended to be broadly interpreted as hardware or a combination of hardware and at least one of software or firmware. "Software" should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable programs, threads of execution, procedures, or functions, whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. As used herein, a "processor" is implemented in hardware or a combination of hardware and software. It will be apparent that the systems or methods described herein may be implemented in various forms of hardware or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems or methods is not limited in any way. Therefore, the operation and behavior of these systems or methods are described herein without reference to specific software code, as those skilled in the art will understand that the software and hardware can be designed to implement these systems or methods, at least in part, based on the description herein. Unless otherwise stated, a component configured to perform a function means that the component has the capability to perform that function, but it is not necessary for the component to actually perform that function.

[0152] As used in this article, depending on the context, "meeting the threshold" can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0153] As used in this article, the phrase “at least one of the items” refers to any combination of these items, including a single member. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0154] No element, action, or instruction used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Similarly, as used herein, the article “described” is intended to include one or more items mentioned in connection with the article “described” and is interchangeable with “one or more.” Furthermore, as used herein, the terms “group” and “cluster” are intended to include one or more entries and are interchangeable with “one or more.” If only one item is desired, the phrase “only one” or similar terminology will be used. Moreover, as used herein, the terms “having” and similar terms are intended as open-ended terms that do not limit the elements they modify (e.g., “having” A may also have B). Additionally, the phrase “based on” is intended to mean “based on or otherwise related to” unless otherwise explicitly stated. Furthermore, as used herein, the term “or” is intended to be inclusive when used consecutively and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “either of the two” or “only one of them”). It should be understood that “one or more” is equivalent to “at least one”.

[0155] Although specific combinations of features are set forth in the claims or disclosed in the description, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically stated in the claims or disclosed in the description. The disclosure of various aspects includes each dependent claim in combination with each other claim in the claim set.

Claims

1. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: A processing system, comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the UE to: Receive auxiliary information related to transmit / receive (Tx / Rx) mismatch associated with the UE from the auxiliary node; One or more Tx / Rx imbalance values ​​associated with the UE are obtained based on the auxiliary information received from the auxiliary node; The effective uplink channel is estimated based on the downlink channel estimation associated with the downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. as well as Uplink communication is transmitted using a pre-decoder associated with the estimated effective uplink channel.

2. The UE of claim 1, wherein the processing system is further configured to cause the UE to: The auxiliary node sends a sounding reference signal (SRS), wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the version of the SRS received by the auxiliary node or an estimate of the effective uplink channel based on the version of the SRS received by the auxiliary node.

3. The UE of claim 2, wherein the processing system is further configured to cause the UE to: Receiving a Channel State Information Reference Signal (CSI-RS) from the auxiliary node, wherein obtaining the one or more Tx / Rx imbalance values ​​associated with the UE includes calculating the one or more Tx / Rx imbalance values ​​based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node.

4. The UE of claim 3, wherein the processing system is further configured to cause the UE to: Estimate the one or more Tx / Rx imbalance values ​​associated with the auxiliary node based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node; and Send feedback to the auxiliary node indicating one or more estimated Tx / Rx imbalance values ​​associated with the auxiliary node.

5. The UE of claim 1, wherein the processing system is further configured to cause the UE to: Receive Channel State Information Reference Signal (CSI-RS) from the auxiliary node; Sending feedback to the auxiliary node indicating the version of the received CSI-RS or an estimate of the effective downlink channel associated with said version of the received CSI-RS; and The auxiliary node sends a probe reference signal (SRS), wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates one or more Tx / Rx imbalance values ​​based on the feedback and the version of the SRS received by the auxiliary node.

6. The UE of claim 5, wherein the feedback is carried in a Media Access Control (MAC) Control Element (MAC-CE) or Protocol Data Unit (PDU) having a header associated with calibrating the one or more Tx / Rx imbalance values.

7. The UE of claim 5, wherein sending the feedback and the SRS to the auxiliary node enables the auxiliary node to obtain one or more Tx / Rx imbalance values ​​associated with the auxiliary node.

8. The UE of claim 1, wherein the auxiliary information is carried in a Media Access Control (MAC) Control Element (MAC-CE) or Protocol Data Unit (PDU) having a header associated with calibrating the one or more Tx / Rx imbalance values.

9. The UE of claim 1, wherein the processing system is further configured to cause the UE to: The auxiliary node is sent with information indicating the ability to calibrate the Tx / Rx mismatch associated with the UE.

10. The UE of claim 9, wherein the information sent to the auxiliary node indicates one or more Tx / Rx calibration procedures supported by the UE.

11. The UE of claim 9, wherein the information sent to the auxiliary node indicates the periodicity of performing one or more Tx / Rx calibration processes.

12. The UE of claim 1, wherein the processing system is further configured to cause the UE to: Send Layer 1 or Layer 2 (L1 / L2) signaling to the auxiliary node, the Layer 1 or Layer 2 (L1 / L2) signaling including a request to calibrate the Tx / Rx mismatch associated with the UE.

13. The UE of claim 1, wherein the processing system is further configured to cause the UE to: The auxiliary node receives radio resource control (RRC) signaling, which includes configuration information for calibrating the Tx / Rx mismatch associated with the UE.

14. The UE according to claim 1, wherein the auxiliary node is an auxiliary network node that communicates with the UE via an access link or an auxiliary UE that communicates with the UE via a side link.

15. A method for wireless communication by a user equipment (UE), the method comprising: Receive auxiliary information related to transmit / receive (Tx / Rx) mismatch associated with the UE from the auxiliary node; One or more Tx / Rx imbalance values ​​associated with the UE are obtained based on the auxiliary information received from the auxiliary node; The effective uplink channel is estimated based on the downlink channel estimation associated with the downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. as well as Uplink communication is transmitted using a pre-decoder associated with the estimated effective uplink channel.

16. The UE according to claim 15, further comprising: The auxiliary node sends a sounding reference signal (SRS), wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates the version of the SRS received by the auxiliary node or an estimate of the effective uplink channel based on the version of the SRS received by the auxiliary node.

17. The UE according to claim 16, further comprising: Receiving a Channel State Information Reference Signal (CSI-RS) from the auxiliary node, wherein obtaining the one or more Tx / Rx imbalance values ​​associated with the UE includes calculating the one or more Tx / Rx imbalance values ​​based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node.

18. The UE according to claim 17, further comprising: Estimate the one or more Tx / Rx imbalance values ​​associated with the auxiliary node based on the received version of the CSI-RS and the auxiliary information received from the auxiliary node; as well as Send feedback to the auxiliary node indicating one or more estimated Tx / Rx imbalance values ​​associated with the auxiliary node.

19. The UE according to claim 15, further comprising: Receive Channel State Information Reference Signal (CSI-RS) from the auxiliary node; Send to the auxiliary node a feedback indicating the version of the received CSI-RS or an estimate of the effective downlink channel associated with the version of the received CSI-RS; as well as The auxiliary node sends a probe reference signal (SRS), wherein the auxiliary information related to the Tx / Rx mismatch associated with the UE indicates one or more Tx / Rx imbalance values ​​based on the feedback and the version of the SRS received by the auxiliary node.

20. The UE of claim 19, wherein the feedback is carried in a Media Access Control (MAC) Control Element (MAC-CE) or Protocol Data Unit (PDU) having a header associated with calibrating the one or more Tx / Rx imbalance values.

21. The UE of claim 19, wherein sending the feedback and the SRS to the auxiliary node enables the auxiliary node to obtain one or more Tx / Rx imbalance values ​​associated with the auxiliary node.

22. The UE of claim 15, wherein the auxiliary information is carried in a Media Access Control (MAC) Control Element (MAC-CE) or Protocol Data Unit (PDU) having a header associated with calibrating the one or more Tx / Rx imbalance values.

23. The UE according to claim 15, further comprising: The auxiliary node is sent with information indicating the ability to calibrate the Tx / Rx mismatch associated with the UE.

24. The UE of claim 23, wherein the information sent to the auxiliary node indicates one or more Tx / Rx calibration procedures supported by the UE.

25. The UE of claim 23, wherein the information sent to the auxiliary node indicates the periodicity of performing one or more Tx / Rx calibration processes.

26. The UE according to claim 15, further comprising: Send Layer 1 or Layer 2 (L1 / L2) signaling to the auxiliary node, the Layer 1 or Layer 2 (L1 / L2) signaling including a request to calibrate the Tx / Rx mismatch associated with the UE.

27. The UE according to claim 15, further comprising: The auxiliary node receives radio resource control (RRC) signaling, which includes configuration information for calibrating the Tx / Rx mismatch associated with the UE.

28. The UE of claim 15, wherein the auxiliary node is an auxiliary network node that communicates with the UE via an access link or an auxiliary UE that communicates with the UE via a side link.

29. 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 the UE, cause the UE to: Receive auxiliary information related to transmit / receive (Tx / Rx) mismatch associated with the UE from the auxiliary node; One or more Tx / Rx imbalance values ​​associated with the UE are obtained based on the auxiliary information received from the auxiliary node; The effective uplink channel is estimated based on the downlink channel estimation associated with the downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the UE. as well as Uplink communication is transmitted using a pre-decoder associated with the estimated effective uplink channel.

30. An apparatus for wireless communication, the apparatus comprising: A component for receiving auxiliary information related to transmit / receive (Tx / Rx) mismatch associated with the device from an auxiliary node; Components for obtaining one or more Tx / Rx imbalance values ​​associated with the device based on the auxiliary information received from the auxiliary node; Components for estimating the effective uplink channel based on the downlink channel estimated according to the downlink reference signal and based on the one or more Tx / Rx imbalance values ​​associated with the device; and A component used to transmit uplink communication using a pre-decoder associated with the estimated effective uplink channel.

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