QCL Determination for A-CSI-RS in Full-Duplex Systems

Abstract

A wireless communication system and method are provided related to determining a QCL (Quick Closer Class) for receiving a reference signal. A User Equipment (UE) determines a QCL configuration for receiving the reference signal during a first time period based on a transmit beam direction to be used for transmission during that first time period. The UE uses a first receive beam direction to receive the reference signal based on this QCL configuration, and simultaneously uses a first communication signal with the transmit beam direction in a common frequency band during the first time period.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to U.S. Patent Application No. 16 / 949,694, filed November 11, 2020, and U.S. Provisional Patent Application No. 62 / 934,350, filed November 12, 2019, the entire contents of which are incorporated herein by reference for all applicable purposes. Technical Field

[0003] This disclosure relates to wireless communication systems and methods. This disclosure includes determining quasi-co-address (QCL) information for an aperiodic channel state information reference signal (A-CSI-RS) in a full-duplex system. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multiple access communication system may include multiple base stations (BSs), each supporting communication for multiple communication devices simultaneously, which may otherwise be referred to as user equipment (UEs).

[0005] To meet the growing demand for expanded mobile broadband connectivity, wireless communication technologies are being advanced from Long Term Evolution (LTE) to Next Generation New Radio (NR), often referred to as fifth generation (5G). NR is designed to offer lower latency, higher bandwidth or throughput, and greater reliability than LTE. It is designed to operate across a wide array of spectrum bands, from low-frequency bands below approximately 1 GHz and mid-frequency bands from approximately 1 GHz to approximately 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands. NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing allows operators to aggregate spectrum in real-time to dynamically support high-bandwidth services. Spectrum sharing extends the benefits of NR technology to operational entities that do not have access to licensed spectrum.

[0006] In a wireless communication network, the BS can configure the UE with quasi-co-location (QCL) related information for receiving DL communication from the BS. Two antenna ports are quasi-co-located when a signal received from one antenna port traverses the same channel or at least a similar channel as another signal received from the other antenna port. QCL can be at various levels. For example, QCL can be in terms of Doppler shift, Doppler spread, average delay, delay spread, and / or receive spatial parameters. Summary of the Invention

[0007] The following outlines some aspects of this disclosure to provide a basic understanding of the techniques discussed. This overview is not a comprehensive summary of all the intended features of this disclosure, and is neither intended to identify key or essential elements of all aspects of this disclosure, nor to depict the scope of any or all aspects of this disclosure. Its sole purpose is to present some concepts of one or more aspects of this disclosure in an overview form as a prelude to the more detailed description that follows.

[0008] For example, in one aspect of this disclosure, a wireless communication method includes a user equipment (UE) determining a quasi-co-location (QCL) configuration for receiving a reference signal during a first time period based on a transmit beam direction to be used for transmission during the first time period; and the UE receiving the reference signal from a base station (BS) using a first receive beam direction based on the QCL configuration, while simultaneously transmitting a first communication signal in a common frequency band using the transmit beam direction during the first time period.

[0009] In an additional aspect of this disclosure, the UE includes a processor configured to determine a QCL configuration for receiving a reference signal during a first time period based on a transmit beam direction to be used for transmission during the first time period; and a transceiver configured to receive the reference signal from the BS using a first receive beam direction based on the QCL configuration, while simultaneously transmitting a first communication signal in a common band using the transmit beam direction during the first time period.

[0010] In another aspect of this disclosure, a non-transitory computer-readable medium has program code recorded thereon. The program code includes code for causing a UE to determine a QCL configuration for receiving a reference signal during a first time period based on a transmit beam direction to be used for transmission during the first time period; and code for causing the UE to receive the reference signal from a BS using a first receive beam direction based on the QCL configuration, while simultaneously transmitting a first communication signal in a common frequency band using the transmit beam direction during the first time period.

[0011] In an additional aspect of this disclosure, the UE includes: a unit for determining a QCL configuration for receiving a reference signal during the first time period based on a transmit beam direction to be used for transmission during the first time period; and a unit for receiving the reference signal from the BS using a first receive beam direction based on the QCL configuration, while simultaneously transmitting a first communication signal in a common band using the transmit beam direction during the first time period.

[0012] Other aspects, features, and embodiments of the invention will become apparent to those skilled in the art when reading the following description of specific exemplary embodiments of the invention in conjunction with the accompanying drawings. While features of the invention may be discussed with respect to certain embodiments and the drawings below, all embodiments of the invention may include one or more advantageous features discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more of these features may also be used according to the various embodiments of the invention discussed herein. Similarly, while exemplary embodiments may be discussed below as embodiments of devices, systems, or methods, it should be understood that such exemplary embodiments may be implemented in various devices, systems, and methods. Attached Figure Description

[0013] Figure 1 A wireless communication network according to some aspects of this disclosure is shown.

[0014] Figure 2 The wireless frame structure according to some aspects of this disclosure is shown.

[0015] Figure 3 An example control resource set (CORESET) configuration is shown according to some aspects of this disclosure.

[0016] Figure 4A This is a timing diagram showing the reception of the Physical Downlink Control Channel (PDCCH) and the Aperiodic Channel State Information Reference Signal (A-CSI-RS) according to some aspects of this disclosure.

[0017] Figure 4B The Physical Downlink Shared Channel (PDSCH) Transport Configuration Indicator (TCI) status configured and activated according to some aspects of this disclosure is shown.

[0018] Figure 5 This is a block diagram of a user equipment (UE) based on some aspects of this disclosure.

[0019] Figure 6 This is a block diagram of an exemplary base station (BS) according to some aspects of this disclosure.

[0020] Figure 7 A scheme for determining the quasi-co-address (QCL) of A-CSI-RS according to some aspects of this disclosure is shown.

[0021] Figure 8 This is a flowchart of a method for determining the QCL of A-CSI-RS according to some aspects of this disclosure.

[0022] Figure 9This is a flowchart of a method for determining the QCL of A-CSI-RS according to some aspects of this disclosure. Detailed Implementation

[0023] The detailed description that follows, taken in conjunction with the accompanying drawings, is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0024] This disclosure generally relates to wireless communication systems, also known as wireless communication networks. In various embodiments, the techniques and apparatus described can be used in wireless communication networks such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, Single Carrier FDMA (SC-FDMA) networks, LTE networks, Global System for Mobile Communications (GSM) networks, 5G or New Radio (NR) networks, and other communication networks. As described herein, the terms "network" and "system" are used interchangeably.

[0025] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, and flash-OFDM. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Specifically, Long Term Evolution (LTE) is a UMTS version using E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization called the 3rd Generation Partnership Project (3GPP), and cdma2000 is described in documents from an organization called 3rd Generation Partnership Project 2 (3GPP2). These various radio technologies and standards are known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration among telecommunications association groups aimed at defining globally applicable specifications for third-generation (3G) mobile phones. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the UMTS mobile phone standard. 3GPP defines specifications for next-generation mobile networks, mobile systems, and mobile devices. This disclosure relates to the evolution of wireless technologies from LTE, 4G, 5G, NR, and the sharing of access to the wireless spectrum between networks using new and different sets of radio access technologies or radio air interfaces.

[0026] Specifically, 5G networks envision using a unified OFDM-based air interface to enable different deployments, different spectrums, and different services and devices. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5G NR will be able to expand to provide coverage for: (1) massive Internet of Things (IoT) with ultra-high density (e.g., ~1M nodes / km2), ultra-low complexity (e.g., ~10s bits / second), ultra-low energy (e.g., ~10+ years of battery life), and deep coverage with the ability to reach challenging locations; (2) mission-critical controls with strong security to protect sensitive personal, financial, or classified information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1ms), and a wide range of users with or without mobility; and (3) extremely high capacity (e.g., ~10Tbps / km2). 2 Enhanced mobile broadband with extreme data rates (e.g., multi-Gbps rates, 100+ Mbps user experience rates) and deep sensing with advanced discovery and optimization.

[0027] 5G NR can be implemented using optimized OFDM-based waveforms with scalable parameter sets and transmission time intervals (TTIs); a common, flexible framework for efficiently reusing services and features with dynamic, low-latency Time Division Duplex (TDD) / Frequency Division Duplex (FDD) designs; and advanced wireless technologies such as massive MIMO, robust millimeter-wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of the parameter set in 5G NR, with the expansion of subcarrier spacing, can effectively address the diverse operational services across different spectrums and deployments. For example, in various outdoor and macro coverage deployments of FDD / TDD implementations below 3 GHz, subcarrier spacing can occur at 15 kHz, for example, exceeding bandwidths (BWs) such as 5, 10, and 20 MHz. For other various outdoor and small-cell coverage deployments of TDD above 3 GHz, subcarrier spacing can occur at 30 kHz over an 80 / 100 MHz BW. For various other indoor broadband implementations using TDD on the unlicensed portion of the 5 GHz band, subcarrier spacing can occur at 60 kHz over a 160 MHz BW. Finally, for various deployments transmitting with mmWave components at 28 GHz TDD, subcarrier spacing can occur at 120 kHz over a 500 MHz BW.

[0028] 5G NR's scalable parameter set facilitates scalable TTIs for different latency and Quality of Service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to begin at symbol boundaries. 5G NR also considers self-contained integrated subframe designs with UL / downlink scheduling information, data, and acknowledgments within the same subframe. These self-contained integrated subframes support communication in unlicensed or contention-based shared spectrum, in an adaptive UL / downlink configuration that can be flexibly configured on a per-cell basis to dynamically switch between UL and downlink to meet current service needs.

[0029] Various other aspects and features of this disclosure are further described below. It will be apparent that the teachings herein can be implemented in many forms, and any specific structure, function, or both disclosed herein are merely representative and not limiting. Based on the teachings herein, those skilled in the art will understand that the aspects disclosed herein can be implemented independently of any other aspects, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement an apparatus or practice a method. Furthermore, in addition to one or more aspects set forth herein, or one or more aspects set forth herein, other structures, functions, or structures and functions may be used to implement such apparatuses or practice such methods. For example, a method may be implemented as part of a system, device, apparatus, and / or as instructions stored on a computer-readable medium for execution on a processor or computer. Moreover, an aspect may include at least one element of the claims.

[0030] Considering that future versions of NR technology may include full-duplex mode, where devices can simultaneously receive downlink signals and transmit uplink signals within the same frequency bandwidth. In half-duplex mode, downlink and uplink signals are transmitted on different frequency bands, or at different times within the same frequency band. Full-duplex mode can lead to self-interference (SI), which occurs when downlink and uplink signals simultaneously received and transmitted by the UE within the same frequency band can interfere with each other. Similarly, the BS can experience SI when simultaneously transmitting downlink signals and receiving uplink signals within the same frequency band.

[0031] When a reference signal, such as an aperiodic channel state information reference signal (A-CSI-RS), is received, the UE can determine which quasi-co-location (QCL) type and configuration to use. The QCL is configured by the network, and the UE can determine which QCL to utilize using downlink control information (DCI) or other means. For example, the UE can determine the specific configuration to utilize QCL type-D based on the Transmission Configuration Indicator (TCI) state indicating the QCL. Specifically, QCL type-D relates to spatial parameters used by the UE for beamforming to receive signals such as A-CSI-RS. For example, the UE can determine the QCL and configuration, including QCL type-D, using the TCI state decoded from the downlink control information (DCI) (e.g., using a lookup table). However, if the DCI has not yet been received or decoded, the UE determines to utilize QCL type-D and the configuration. In some aspects, the QCL value or configuration can reference a receive beam index, where a set of spatial beamforming parameters can be used to generate a receive beam corresponding to the receive beam index. When operating in full-duplex mode, the SI (Separation Indicator) may exist between the uplink transmission beam and the symbol used by the UE to receive A-CSI-RS, depending on the spatial parameters of the uplink transmission beam. The uplink transmission beam is the transmission beam used by the UE in the uplink direction. Therefore, aspects of this disclosure relate to configurations for QCL type-D selection that minimize the SI between uplink transmission and reception of A-CSI-RS.

[0032] One approach to selecting a QCL type-D configuration is to utilize the QCL configuration used for the receive control resource set (CORESET). This approach can be used, for example, in half-duplex mode (e.g., 3GPP TS 38.214Rel-15 sub-clause 5.2.1.51). However, this approach may not account for potential interference between uplink and downlink beams. For instance, if a CORESET QCL configuration is selected as the QCL type-D configuration for receiving A-CSI-RS, the UE's uplink beam may already have a different orientation or spatial pattern when that CORESET is received compared to the uplink beam the UE will use when receiving A-CSI-RS. Due to this change in uplink beam, unacceptable SI levels may exist if the UE simply applies the CORESET QCL configuration when receiving A-CSI-RS.

[0033] This application describes a mechanism for a full-duplex UE to determine a QCL configuration for receiving downlink reference signals, taking into account uplink beam orientation. For example, the UE can be configured to determine whether to use a potential QCL type-D configuration based on the UE's uplink beam orientation during the same time period in which A-CSI-RS will be received. The UE's determination of whether a potential QCL type-D configuration is available based on its uplink beam orientation may include, for example, determining whether the potential QCL type-D configuration is associated with an uplink beam that would result in a strong or unacceptable SI (e.g., based on a specific interference measurement threshold) and is therefore available or unavailable. In addition to determining whether a first potential QCL configuration is available, this application also describes a mechanism for determining a second (and third, etc.) potential QCL configuration if the first potential QCL configuration is unavailable.

[0034] In some aspects, the UE determines the QCL type-D for A-CSI-RS in a full-duplex system. For example, if the time offset between the PDCCH carrying a triggered DCI with a TCI state and the A-CSI-RS is greater than a threshold, the UE can apply a QCL assumption based on the TCI state indication in the DCI decoded from the PDCCH. At this point, the network can configure the QCL assumption to account for interference such as SI and indicate the QCL assumption via the TCI state in the triggered DCI. Furthermore, if the time offset between the PDCCH carrying a triggered DCI with a TCI state and the A-CSI-RS is less than a threshold, the UE can determine whether any other downlink signal with an indicated TCI state exists in the same symbol as the A-CSI-RS resource, and if so, apply the QCL configuration of that other downlink signal when receiving the A-CSI-RS. If no other downlink signal with an indicated TCI state exists in the same symbol as the A-CSI-RS resource, the UE can consider the QCL configuration of the CORESET associated with the search space monitored by the UE that has the lowest CORESET-ID. In some respects, when selecting a CORESET associated with the search space monitored by the UE that has the lowest CORESET-ID, the UE can determine whether the QCL configuration for that CORESET is available. If so, the QCL configuration for that CORESET is selected as the QCL configuration for receiving A-CSI-RS. If not, the UE can evaluate other potential QCL configurations for receiving A-CSI-RS.

[0035] In some respects, if a potential QCL configuration associated with the lowest CORESET-ID is determined to be unavailable, the UE may consider the next lowest CORESET-ID. The UE may repeat this method for each CORESET-ID until a suitable QCL configuration is identified. If it is determined that no QCL configuration associated with any CORESET in the search space monitored by the UE is available, the UE may consider the TCI state with the lowest TCI state ID in the set of active and / or configured TCI states. If it is determined that the associated QCL configuration is available, the UE may select its QCL type-D configuration as the default based on the TCI state. If it is determined that the QCL configuration associated with the TCI state is unavailable, the UE considers the next lowest TCI state ID from the set of active and / or configured TCI states.

[0036] In some respects, for A-CSI-RS reception on a cell with no monitored CORESET, the QCL type-D configuration to be used for receiving A-CSI-RS is selected from the nearest and available downlink channel or downlink reference signal.

[0037] Several benefits can be provided by various aspects of this disclosure. For example, this disclosure provides backward compatibility with existing versions of the QCL determination process because the UE applies half-duplex rules where possible. Additionally, contrary to the unavailability of uplink beams that would interfere with the UE, determining the QCL configuration based on the direction of the UE's uplink beam during the same time period during which A-CSI-RS will be received advantageously identifies available QCL configurations for A-CSI-RS reception. Furthermore, this disclosure advantageously provides a process for selecting a QCL type-D configuration when no CORESET QCL type-D configuration is available or when the cell does not have any configured CORESET.

[0038] Figure 1 A wireless communication network 100 according to some aspects of this disclosure is illustrated. Network 100 may be a 5G network. Network 100 includes multiple base stations (BSs) 105 (labeled 105a, 105b, 105c, 105d, 105e, and 105f, respectively) and other network entities. BS 105 may be a station communicating with UE 115 and may also be referred to as an evolved Node B (eNB), a next-generation eNB (gNB), an access point, etc. Each BS 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to that specific geographic coverage area of ​​BS 105 and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0039] BS 105 can provide communication coverage for macro cells or small cells (such as pico cells or femto cells) and / or other types of cells. Macro cells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as pico cells) will typically cover a relatively small geographic area and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as femto cells) will also typically cover a relatively small geographic area (e.g., residential areas) and, in addition to unrestricted access, provide restricted access for UEs associated with that femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in a home, etc.). A BS used for macro cells can be referred to as a macro BS. A BS used for small cells can be referred to as a small cell BS, pico BS, femto BS, or home BS. Figure 1 In the examples shown, BS 105d and 105e can be conventional macro BSs, while BS 105a-105c can be macro BSs enabling one of three-dimensional (3D), full-dimensional (FD), or massive MIMO. BS 105a-105c can leverage their higher-dimensional MIMO capabilities to utilize 3D beamforming, either elevation or azimuth beamforming, to increase coverage and capacity. BS 105f can be a small cell BS, which can be a home node or a portable access point. BS 105 can support one or more (e.g., two, three, four, etc.) cells.

[0040] Network 100 can support synchronous or asynchronous operation. For synchronous operation, BSs can have similar frame timing, and transmissions from different BSs can be roughly aligned in time. For asynchronous operation, BSs can have different frame timing, and transmissions from different BSs can be out of time.

[0041] UE 115 is distributed throughout wireless network 100, and each UE 115 can be fixed or mobile. UE 115 may also be referred to as a terminal, mobile station, subscriber unit, station, etc. UE 115 can be a cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc. In one aspect, UE 115 can be a device including a Universal Integrated Circuit Card (UICC). In another aspect, UE 115 can be a device without a UICC. In some aspects, UE 115 without a UICC can also be referred to as an IoT device or Internet of Things (IoE) device. UE 115a-115d are examples of mobile smartphone-type devices accessing network 100. UE 115 can also be a machine specifically configured for connecting to communications, including Machine Type Communication (MTC), Enhanced MTC (eMTC), Narrowband IoT (NB-IoT), etc. UE 115e-L15h are examples of various machines configured for accessing communications on network 100. The UE115i-115k is an example of a vehicle equipped with wireless communication equipment configured for accessing network 100. The UE 115 can communicate with any type of BS, whether macro BS, small cell, etc. Figure 1 In the context of lightning (e.g., a communication link), a lightning bolt indicates a radio transmission between UE 115 and a serving BS 105, which is a BS designated to serve UE 115 on the downlink (DL) and / or uplink (UL), a desired transmission between BS 105, a backhaul transmission between BSs, or a sidelink transmission between UE 115.

[0042] In operation, BS 105a-105c can use 3D beamforming and coordinated spatial technologies such as Coordinated Multipoint (CoMP) or Multi-Connection to serve UE 115a and 115b. Macro BS 105d can perform backhaul communication with BS 105a-105c as well as the small cell, BS 105f. Macro BS 105d can also transmit multicast services subscribed to and received by UE 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber Alerts or Grey Alerts.

[0043] BS 105 can also communicate with the core network. The core network can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BS 105s (e.g., examples of gNBs or Access Node Controllers (ANCs)) can interface with the core network via backhaul links (e.g., NG-C, NG-U, etc.) and can perform radio configuration and scheduling for communication with UE 115. In various examples, BS 105s can communicate with each other directly or indirectly (e.g., via the core network) via backhaul links (e.g., XI, X2, etc.), which can be wired or wireless communication links.

[0044] Network 100 can also support mission-critical communication using ultra-reliable and redundant links for mission-critical devices such as UE 115e, which could be a drone. Redundant communication links with UE 115e may include links from macro BSs 105d and 105e, and links from small cell BS 105f. Other machine-type devices, such as UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device), can communicate directly with BSs (such as small cell BS 105f and macro BS 105e) via network 100, or via network 100 in a multi-step size configuration by communicating with another user device (such as UE 115f transmitting temperature measurement information to a smart meter) that relays its information to the network, and then UE 115g reports to the network via small cell BS 105f. Network 100 can also provide additional network efficiency through dynamic, low-latency TDD / FDD communications, such as V2V, V2X, C-V2X communications between UE 115i, 115j, or 115k and other UE 115, and / or vehicle-to-infrastructure (V2I) communications between UE 115i, 115j, or 115k and BS 105.

[0045] In some implementations, network 100 utilizes OFDM-based waveforms for communication. An OFDM-based system can divide the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, frequency bands, etc. Each subcarrier can be modulated with data. In some cases, the subcarrier spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system BW. The system BW can also be divided into subbands. In other cases, the subcarrier spacing and / or the duration of the time interval (TTI) can be scalable.

[0046] In some respects, BS 105 can allocate or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RBs)) for downlink (DL) and uplink (UL) transmissions in network 100. DL refers to the transmission direction from BS 105 to UE 115, while UL refers to the transmission direction from UE 115 to BS 105. This communication can be in the form of radio frames. Radio frames can be divided into multiple subframes or time slots, for example, approximately 10. Each time slot can be further divided into mini-time slots. In FDD mode, simultaneous UL and DL transmissions can occur in different frequency bands. For example, each subframe includes UL subframes in the UL band and DL subframes in the DL band. In TDD mode, UL and DL transmissions occur using the same frequency band at different time periods. For example, a subset of subframes in a radio frame (e.g., DL subframes) can be used for DL ​​transmissions, and another subset of subframes in a radio frame (e.g., UL subframes) can be used for UL transmissions.

[0047] DL subframes and UL subframes can be further divided into several regions. For example, each DL or UL subframe may have a predefined region for the transmission of reference signals, control information, and data. Reference signals are predetermined signals that facilitate communication between BS 105 and UE 115. For example, reference signals may have a specific pilot pattern or structure, where pilot tones may span an operating BW or frequency band, each band being positioned at a predefined time and predefined frequency. For example, BS 105 may transmit a cell-specific reference signal (CRS) and / or a channel state information-reference signal (CSI-RS) to enable UE 115 to estimate the DL channel. Similarly, UE 115 may transmit a sounding reference signal (SRS) to enable BS 105 to estimate the UL channel. Control information may include resource allocation and protocol control. Data may include protocol data and / or operational data. In some aspects, BS 105 and UE 115 may communicate using self-contained subframes. Self-contained subframes may include portions for DL ​​communication and portions for UL communication. Self-contained subframes can be DL-centric or UL-centric. DL-centric subframes can include a duration longer than that used for DL ​​communication. UL-centric subframes can include a duration longer than that used for DL ​​communication.

[0048] In some respects, network 100 may be an NR network deployed on licensed spectrum. BS 105 may transmit synchronization signals (e.g., including primary synchronization signal (PSS) and secondary synchronization signal (SSS)) within network 100 to facilitate synchronization. BS 105 may broadcast system information associated with network 100 (e.g., including primary information block (MIB), residual system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some cases, BS 105 may broadcast PSS, SSS, and / or MIB in the form of synchronization signal blocks (SSB) via the physical broadcast channel (PBCH), and may broadcast RMSI and / or OSI via the physical downlink shared channel (PDSCH).

[0049] In some respects, UE 115 attempting to access network 100 can perform an initial cell search by detecting a PSS from BS 105. The PSS can provide periodically timed synchronization and can indicate a physical layer identification value. UE 115 can then receive an SSS. The SSS can provide radio frame synchronization and can provide a cell identification value, which can be combined with a physical layer identification value to identify the cell. The PSS and SSS can be located in the center portion of the carrier or at any suitable frequency within the carrier.

[0050] After receiving the PSS and SSS, UE 115 can receive the MIB. The MIB may include system information for initial network access and scheduling information for RMSI and / or OSI. After decoding the MIB, UE 115 can receive the RMSI and / or OSI. The RMSI and / or OSI may include radio resource control (RRC) information related to the Random Access Channel (RACH) procedure, paging, control resource set (CORESET) for monitoring the Physical Downlink Control Channel (PDCCH), Physical UL Control Channel (PUCCH), Physical UL Shared Channel (PUSCH), power control, and SRS.

[0051] After obtaining the MIB, RMSI, and / or OSI, UE 115 can perform a random access procedure to establish a connection with BS 105. In some examples, the random access procedure can be a four-step random access procedure. For example, UE 115 can send a random access preamble, and BS 105 can respond with a random access response. The random access response (RAR) may include a detected random access preamble identifier (ID) corresponding to the random access preamble, timing advance (TA) information, UL grant, temporary cell radio network temporary identifier (C-RNTI), and / or backoff indicator. Upon receiving the random access response, UE 115 can send a connection request to BS 105, and BS 105 can respond with a connection response. The connection response may indicate contention resolution. In some examples, the random access preamble, RAR, connection request, and connection response may be referred to as message 1 (MSG1), message 2 (MSG2), message 3 (MSG3), and message 4 (MSG4), respectively. In some examples, the random access procedure can be a two-step random access procedure, in which UE 115 can send a random access preamble and a connection request in a single transmission, and BS105 can respond by sending a random access response and a connection response in a single transmission.

[0052] After the connection is established, UE 115 and BS 105 can enter the normal operation phase, during which they can exchange operational data. For example, BS 105 can schedule UE 115 for UL and / or DL ​​communication. BS 105 can send UL and / or DL ​​scheduling authorizations to UE 115 via PDCCH. The scheduling authorizations can be sent in the form of DL control information (DCI). BS 105 can send DL communication signals (e.g., carrying data) to UE 115 via PDSCH based on the DL scheduling authorization. UE 115 can send UL communication signals to BS 105 via PUSCH and / or PUCCH based on the UL scheduling authorization.

[0053] In some aspects, network 100 can operate on a system BW or a component carrier (CC) BW. Network 100 can divide the system BW into multiple BWPs (e.g., portions). BS 105 can dynamically assign UE 115 to operate on a particular BWP (e.g., a portion of the system BW). The assigned BWP can be referred to as the active BWP. UE 115 can monitor the active BWP for signaling information from BS 105. BS 105 can schedule UE 115 for UL or DL ​​communication within the active BWP. In some aspects, BS 105 can assign a pair of BWPs within a CC to UE 115 for UL and DL communication. For example, a BWP pair may include one BWP for UL communication and one BWP for DL ​​communication. In some aspects, BS 105 and UE 115 can perform full-duplex mode, where each of BS 105 and UE 115 can simultaneously receive and transmit in the same frequency bandwidth. Alternatively, BS 105 and UE 115 may perform half-duplex mode, wherein each of BS 105 and UE 115 may transmit and receive in different frequency bands (e.g., FDD mode) or at different times (e.g., TDD mode).

[0054] In some aspects, network 100 can operate to provide the UE with an aperiodic channel state information reference signal (A-CSI-RS), enabling the UE to report measurements and parameters related to the channel state or channel quality received by the UE to the network. The network can also operate to provide the UE with other downlink reference signals (e.g., DM-RS) or other downlink channels (e.g., PDCCH, PDSCH). The network can provide other downlink signals or channels to the UE at the same time or in the same symbols as providing A-CSI-RS. The network can also provide the UE with one or more CORESETs in a given cell, each CORESET having an associated index or CORESET-ID. In addition to the primary cell, the network can also configure secondary cells for the UE, wherein the secondary cells may not include any CORESETs. The network can provide CORESETs in the active BWP or the monitored search space.

[0055] In some aspects, network 100 can provide the UE with a trigger or authorization indicating that the UE will receive A-CSI-RS signals on one or more subsequent symbols. The network can provide this trigger in the form of downlink control information (DCI) transmitted in the PDCCH. The network can also provide a quasi-co-address (QCL) configuration for decoding A-CSI-RS in the PDCCH DCI. For example, the QCL configuration can be indicated in the Transport Configuration Indicator (TCI) state. The network can transmit this TCI state via the TCI state ID field in the PDCCH DCI. The network can also transmit the TCI state for the UE to receive the PDCCH itself and / or other downlink channels or signals via the TCI state ID. In some cases, the network can configure the TCI state for the UE in configuration data, thereby assigning an index to the configured state. The network can then activate or deactivate the configured TCI state via a bitmap, where each bit position represents a TCI state index, and the bit value indicates whether the index is activated / deactivated. For example, the network can activate / deactivate the TCI state used for the Physical Downlink Shared Channel (PDSCH).

[0056] In some respects, UE 115 may determine, based on the A-CSI-RS grant provided by the base station, that the time required for the UE to decode the DCI indicating QCL type-D for A-CSI-RS reception is greater than the time until the UE receives the A-CSI-RS. For example, the UE may determine that the timing offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the A-CSI-RS is greater than a threshold. Furthermore, the threshold may depend on the UE's capabilities (e.g., a UE that can decode and process the PDCCH CSI faster, and therefore can obtain QCL type-D faster and before the A-CSI-RS arrives, will have a lower threshold).

[0057] Figure 2 This is a timing diagram illustrating a radio frame structure 200 according to some aspects of this disclosure. The radio frame structure 200 can be used by a BS (such as BS 105) and a UE (such as UE 115) for communication within a network (e.g., network 100). Specifically, the BS can communicate with the UE using time-frequency resources configured as shown in the radio frame structure 200. Figure 2 In this diagram, the X-axis represents time in some arbitrary units, and the Y-axis represents frequency in some arbitrary units. The transmission frame structure 200 includes a radio frame 201. The duration of the radio frame 201 can vary depending on various factors. In the example, the radio frame 201 may have a duration of approximately 10 milliseconds. The radio frame 201 includes M time slots 202, where M can be any suitable positive integer. In the example, M may be approximately 10.

[0058] Each time slot 202 includes multiple subcarriers 204 in frequency and multiple symbols 206 in time. The number of subcarriers 204 and / or symbols 206 in time slot 202 can vary depending on various factors, such as channel bandwidth, subcarrier spacing (SCS), and / or CP mode. One subcarrier 204 in frequency and one symbol 206 in time form a resource element (RE) 212 for transmission. A resource block (RB) 210 is formed by multiple consecutive subcarriers 204 in frequency and multiple consecutive symbols 206 in time.

[0059] In the example, BS (e.g., Figure 1 BS 105 in the middle can schedule the UE with time granularity of time slot 202 or mini time slot 208 (e.g., Figure 1 UE 115 in the context of UL and / or DL ​​communication. Each time slot 202 can be time-divided into K mini-time slots 208. Each mini-time slot 208 may include one or more symbols 206. The mini-time slots 208 in time slot 202 may have variable lengths. For example, when time slot 202 includes N symbols 206, the mini-time slot 208 may have a length between one symbol 206 and (N-1) symbols 206. In some aspects, the mini-time slot 208 may have a length of approximately two symbols 206, approximately four symbols 206, or approximately seven symbols 206. In some examples, the BS may schedule the UE at the frequency granularity of resource block (RB) 210 (e.g., including approximately 12 subcarriers 204).

[0060] Figure 3 An example CORESET configuration 300 according to some aspects of this disclosure is shown. Configuration 300 can be used by a BS (such as BS 105) and a UE (such as UE 115) in a network (e.g., network 100). In particular, the BS can configure the search space for the UE according to the CORESET configuration for monitoring DL control information (e.g., PDCCH). CORESET 310 is an example CORESET with CORESET-ID1, and CORESET 320 is an example CORESET with CORESET-ID2. As indicated by the shaded symbol 206 representing CORESET reception, the UE receives various CORESETs at different times. For example, at S0, if the shaded symbol is indicated only for CORESET-ID2, the UE receives only CORESET-ID2; then at S1, the UE receives both CORESET-ID1 and CORESET-ID2 at the same time, i.e., in the same symbol.

[0061] exist Figure 3In the example shown, the lowest CORESET-ID received by the UE is different for slot 0 compared to slot 1. For example, in slot 2, the lowest CORESET-ID for the most recently received slot (slot 1) is CORESET-ID 1, while in slot 1, the lowest CORESET-ID for the most recently received slot (slot 0) is CORESET-ID 2.

[0062] Figure 4A and Figure 4B Together, this illustrates the UE's determination of the TCI state and the associated QCL type-D configuration to be used for receiving A-CSI-RS based on the decoded PDCCH DCI. The UE may correspond to UE 115 in network 100, which receives the PDCCH DCI from BS105. Figure 4A This is a timing diagram 400 illustrating the PDCCH and A-CSI-RS reception according to some aspects of this disclosure. Specifically, Figure 4A The time required for the UE to decode the PDCCH DCI indicating the QCL type-D configuration used to receive A-CSI-RS is shown, compared to when the UE will receive A-CSI-RS itself. Figure 4B The configured and activated PDSCH TCI status according to some aspects of this disclosure is shown. In particular, Figure 4B A sample table showing the configured TCI states and a bitmap of the active TCI states are provided.

[0063] refer to Figure 4A Timing diagram 400 illustrates the reception of PDCCH DCI 410, A-CSI-RS 420, and another DL channel or signal 430 for each symbol 206 within a time slot. A-CSI-RS 420 and DL channel signal 430 can be arranged at the frequencies shown or in any other suitable arrangement. For example, A-CSI-RS 420 and DL channel signal 430 can occupy any suitable subcarrier in symbol S2. The UE receives PDCCH DCI at symbol S0, which indicates that A-CSI-RS 420 is scheduled to be transmitted to the UE at symbol S2. PDCCH DCI 410 can also indicate the TCI state, and thus indicate the QCL type -D for the UE to receive A-CSI-RS. The UE can also receive another downlink channel or reference signal 430 during the same symbol S2, during which the UE will receive A-CSI-RS, as indicated by the shaded signal 430 at symbol S2.

[0064] exist Figure 4AIn the example shown, depending on the UE's capabilities and the number of symbols required to decode the DCI indicating the A-CSI-RS TCI state, the UE may not complete decoding the DCI before symbol S3 indicated by DCI 450, which occurs after the UE is scheduled to receive A-CSI-RS in symbol S2 (e.g., the timing offset between the PDCCH and A-CSI-RS is greater than a threshold). Alternatively, depending on the UE's capabilities and the number of symbols required to decode the A-CSI-RS TCI state, the UE may complete decoding the DCI at symbol S1 indicated by DCI 440, which occurs before the UE is scheduled to receive A-CSI-RS in symbol S2 (e.g., the timing offset between the PDCCH and A-CSI-RS is less than a threshold).

[0065] Figure 4B A sample table of configured TCI states is shown on the left-hand side at 460°. For example, the network can configure a TCI state table for the UE, where each index or TCI state ID (T1, T2, etc.) is associated with a specific TCI state configured for the UE, which is associated with parameters such as QCL type-D configuration. Figure 4B The right-hand side 470 shows a bitmap that can be used by the network to activate the configured TCI states. For example, each position in the bitmap corresponds to an index of the configured TCI states (T1, T2, etc.), and the value of each bit in the bitmap indicates whether the configured TCI state will be activated or deactivated.

[0066] As mentioned above, when a wireless communication device operates in full-duplex mode, it simultaneously transmits and receives on the same frequency band. This transmission can introduce self-interference at the receiver. Therefore, although some wireless communication protocols can provide rules for determining the QCL assumption for half-duplex communication, the same QCL assumption may not be applicable or may not provide good performance for full-duplex operation due to self-interference.

[0067] Therefore, this disclosure provides a technique for selecting a QCL type-D configuration for a full-duplex UE when the UE is unable to complete decoding of the DCI indicating the A-CSI-RS TCI state until the UE is scheduled to receive A-CSI-RS. This disclosure includes selecting a QCL type-D configuration based on the uplink beam pattern used by the UE while the UE is scheduled to receive A-CSI-RS.

[0068] Figure 5 This is a block diagram of an exemplary UE 500 according to some aspects of this disclosure. UE 500 may be as described above. Figure 1The UE 115 discussed herein. As shown, the UE 500 may include a processor 502, a memory 504, an A-CSI-RS communication module 508, a transceiver 510 including a modem subsystem 512 and a radio frequency (RF) unit 514, and one or more antennas 516. These units may communicate with each other directly or indirectly, for example, via one or more buses.

[0069] Processor 502 may include a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a controller, a field-programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof, configured to perform the operations described herein. Processor 502 may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0070] Memory 504 may include cache memory (e.g., the cache memory of processor 502), random access memory (RAM), magnetoresistive RAM (MRAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state memory devices, hard disk drives, other forms of volatile and non-volatile memory, or combinations of different types of memory. In one aspect, memory 504 includes a non-transitory computer-readable medium. Memory 504 may store or have instructions 506 recorded thereon. Instructions 506 may include instructions that, when executed by processor 502, cause processor 502 to perform the operations described herein with reference to UE115 in conjunction with various aspects of this disclosure, for example, Figures 7 to 9 Instruction 506 may also be referred to as program code. Program code can be used to cause wireless communication devices to perform these operations, for example, by causing one or more processors (such as processor 502) to control or command the wireless communication devices to perform such operations. The terms "instruction" and "code" should be interpreted broadly to include any type of computer-readable statement. For example, the terms "instruction" and "code" can refer to one or more programs, routines, subroutines, functions, procedures, etc. "Instruction" and "code" can include a single computer-readable statement or many computer-readable statements.

[0071] The A-CSI-RS communication module 508 can be implemented via hardware, software, or a combination thereof. For example, the A-CSI-RS communication module 508 can be implemented as a processor, circuitry, and / or instructions 506 stored in memory 504 and executed by processor 502. In some examples, the A-CSI-RS communication module 508 can be integrated within a modem subsystem 512. For example, the A-CSI-RS communication module 508 can be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 512. In some examples, the UE may include one or more modules that constitute the A-CSI-RS communication module 508.

[0072] The A-CSI-RS communication module 508 can be used in various aspects of this disclosure, for example, Figure 7-9 In some aspects, the A-CSI-RS communication module 508 is configured to receive A-CSI-RS using a QCL type-D configuration decoded from the DCI. In some aspects, the A-CSI-RS communication module 508 is also configured to determine the QCL type-D to be used for receiving A-CSI-RS if the DCI indicating the A-CSI-RS status cannot be decoded before receiving A-CSI-RS. In some aspects, the A-CSI-RS communication module 508 is also configured to determine the QCL type-D based on the TCI state used to decode another downlink signal in the same symbol in which A-CSI-RS will be received. In some aspects, the A-CSI-RS communication module 508 is also configured to select the QCL type-D configuration based on the TCI state of the lowest CORESET-ID received in the latest or previous timeslot determining that the QCL type-D configuration for CORESET is available. In some aspects, the A-CSI-RS communication module 508 is also configured to select the QCL type-D configuration based on the lowest available or active TCI state ID when no QCL type-D configuration for the CORESET is available. In some aspects, the A-CSI-RS communication module 508 is also configured to select the QCL type-D configuration based on the TCI state of the most recent and available downlink channel or reference signal when no CORESET is configured for the cell.

[0073] In some aspects, the A-CSI-RS communication module 508 is also configured to determine whether a potential QCL Type-D configuration is available based on the uplink beam pattern used by the UE during a symbol in which it is scheduled to receive A-CSI-RS. For example, the A-CSI-RS communication module 508 may determine whether a potential QCL Type-D configuration is available by comparing the direction of the UE's uplink beam with the direction of the downlink beam used to receive A-CSI-RS as indicated by the potential QCL Type-D configuration. As another example, the A-CSI-RS communication module 508 may determine whether a potential QCL Type-D configuration is available based on interference between the downlink beam used to receive A-CSI-RS and the uplink beam of a UE transmitting in the same time or symbol of receiving A-CSI-RS (e.g., based on a certain interference threshold). In this disclosure, the determination of whether a QCL Type-D configuration is available or unavailable is not limited to a determination based on self-interference. In some aspects, the A-CSI-RS communication module 508 is also configured to process information about other downlink channels or reference signals with associated TCI states and QCL type-D configurations. In some aspects, the A-CSI-RS communication module 508 is also configured to process information about the configured or active TCI states of the UE.

[0074] As shown in the figure, transceiver 510 may include modem subsystem 512 and RF unit 514. Transceiver 510 may be configured to communicate bidirectionally with other devices (such as BS 105). Modem subsystem 512 may be configured to modulate and / or encode data from memory 504 and / or A-CSI-RS communication module 508 according to a modulation and coding scheme (MCS), such as low-density parity-check (LDPC) coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc. RF unit 514 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) modulated / coded data (e.g., configured UL transmission, PUSCH, PUCCH, PRACH, SRS) from modem subsystem 512 (on outbound transmissions) or modulated / coded data (e.g., configured UL transmission, PUSCH, PUCCH, PRACH, SRS) originating from another source (such as UE 115 or BS 105). RF unit 514 can also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in transceiver 510, modem subsystem 512 and RF unit 514 can be separate devices coupled together at UE 115 to enable UE 115 to communicate with other devices.

[0075] RF unit 514 can provide modulated and / or processed data, such as data packets (or more generally, data messages containing one or more data packets and other information), to antenna 516 for transmission to one or more other devices. Antenna 516 can also receive data messages transmitted from other devices. Antenna 516 can provide the received data messages for processing and / or demodulation at transceiver 510. Transceiver 510 can provide demodulated and decoded data (e.g., PDCCH, PDSCH, DCI, CORESET, QCL Type-D Configuration, TCI Status Table, A-CSI-RS Trigger, A-CSI-RS Signal, CSI-RS, other downlink reference signals) to A-CSI-RS communication module 508 for processing. Antenna 516 may include multiple antennas of similar or different designs to maintain multiple transmission links. RF unit 514 can configure antenna 516.

[0076] In the example, transceiver 510 is configured to receive A-CSI-RS from a base station (BS) according to the downlink beam direction indicated by the selected QCL type-D configuration, and to communicate with the BS in the uplink beam direction, for example, by coordinating with the A-CSI-RS module to select the QCL type-D configuration for receiving A-CSI-RS based on the UE's uplink beam direction or, for example, based on whether that value is available.

[0077] In one aspect, UE 500 may include multiple transceivers 510 implementing different RATs (e.g., NR and FTE). In another aspect, UE 500 may include a single transceiver 510 implementing multiple RATs (e.g., NR and LTE). In yet another aspect, transceiver 510 may include various components, wherein different combinations of components can implement different RATs.

[0078] Figure 6 This is a block diagram of an exemplary BS 600 according to some aspects of this disclosure. BS 600 may be BS 105 in network 100, as shown above. Figure 1 As discussed herein, BS 600 may include a processor 602, a memory 604, an A-CSI-RS communication module 608, a transceiver 610 including a modem subsystem 612 and an RF unit 614, and one or more antennas 616. These components may communicate directly or indirectly with each other, for example, via one or more buses.

[0079] Processor 602 can have various characteristics as a particular type of processor. For example, these can include a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein. Processor 602 can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0080] Memory 604 may include cache memory (e.g., the cache memory of processor 602), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state memory devices, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or combinations of different types of memory. In some aspects, memory 604 may include a non-transitory computer-readable medium. Memory 604 may store instructions 606. Instructions 606 may include instructions that, when executed by processor 602, cause processor 602 to perform the operations described herein, for example, Figures 7 to 9 Regarding this aspect, instruction 606 can also be referred to as code, which can be broadly interpreted to include the aspects mentioned above. Figure 5 Any type of computer-readable statement discussed.

[0081] The A-CSI-RS communication module 608 can be implemented via hardware, software, or a combination thereof. For example, the A-CSI-RS communication module 608 can be implemented as a processor, circuitry, and / or instructions 606 stored in memory 604 and executed by processor 602. In some examples, the A-CSI-RS communication module 608 can be integrated within a modem subsystem 612. For example, the A-CSI-RS communication module 608 can be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 612. In some examples, the UE may include one or more modules that constitute the A-CSI-RS communication module 608.

[0082] The A-CSI-RS communication module 608 can be used in various aspects of this disclosure, for example, Figures 7 to 9In some aspects, the A-CSI-RS communication module 608 can be configured to convey to the UE a trigger indicating that the UE will receive A-CSI-RS. In some aspects, the A-CSI-RS communication module 608 is configured to send A-CSI-RS to the UE. In some aspects, the A-CSI-RS communication module 608 is configured to send to the UE information indicating the TCI state for receiving A-CSI-RS within the PDCCH DCI. In some aspects, the A-CSI-RS communication module 608 is configured to send to the UE a table of configured TCI states and their associated indexes. In some aspects, the A-CSI-RS communication module 608 is configured to send to the UE a bitmap indicating which of the configured TCI states are activated / deactivated.

[0083] As shown, transceiver 610 may include modem subsystem 612 and RF unit 614. Transceiver 610 may be configured to communicate bidirectionally with other devices, such as UE 115 and / or 500 and / or another core network element. Modem subsystem 612 may be configured to modulate and / or encode data according to an MCS, such as LDPC coding scheme, turbo coding scheme, convolutional coding scheme, digital beamforming scheme, etc. RF unit 614 can be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) modulation / coded data (e.g., PDCCH, PDSCH, DCI, CORESET, QCL type D configuration (e.g., values, indexes, etc.), TCI status table, A-CSI-RS trigger, A-CSI-RS signal, CSI-RS, other downlink reference signals) from modem subsystem 612 (outbound transmission) or from another source (such as UE 115 and / or UE 500) to perform analog beamforming. RF unit 614 can also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in transceiver 610, modem subsystem 612 and RF unit 614 may be separate devices coupled together at BS 105 to enable BS 105 to communicate with other devices.

[0084] RF unit 614 can provide modulated and / or processed data, such as data packets (or more generally, data messages containing one or more data packets and other information), to antenna 616 for transmission to one or more other devices. According to some aspects of this disclosure, this may include, for example, transmitting information to complete attachment to a network and communication with a residing UE 115 or 500. Antenna 616 can also receive data messages transmitted from other devices and can provide the received data messages for processing and / or demodulation at transceiver 610. Transceiver 610 can provide demodulated and decoded data (e.g., configured UL transmissions, PUSCH, PUCCH, PRACH, SRS) to communication module 608 and configured transmission module 608 for processing. Antenna 616 may include multiple antennas of similar or different designs to maintain multiple transmission links.

[0085] In one aspect, the BS 600 may include multiple transceivers 610 implementing different RATs (e.g., NR and LTE). In another aspect, the BS 600 may include a single transceiver 610 implementing multiple RATs (e.g., NR and LTE). In yet another aspect, the transceiver 610 may include various components, wherein different combinations of components can implement different RATs.

[0086] Figure 7-9 Various mechanisms that can be adopted by a UE (e.g., UE 115 and 500) to determine the QCL for A-CSI-RS according to some aspects of this disclosure are shown.

[0087] Figure 7 Scheme 700 for determining the QCL of A-CSI-RS is shown according to some aspects of this disclosure. Specifically, Figure 7Resource maps are shown of various downlink signals received by the UE within the same frequency band (including in full-duplex mode) during different time slots 202. For example, the UE receives PDCCH DCI 710 during symbol i of time slot 2 (e.g., the current time slot). The UE receives A-CSI-RS during symbol j of time slot 2. The UE also receives CORESET 730 and 740 with CORESET-ID1 and 2 respectively during time slot 1 (e.g., the latest time slot). The first symbol of PDCCH DCI 710 can be used to trigger or authorize A-CSI-RS, indicating to the UE that it will receive the upcoming symbol of A-CSI-RS. PDCCH DCI 710 may also include a DCI indicating the TCI state, and thus an associated QCL type-D configuration indicating that the UE will use to receive A-CSI-RS 720. Depending on the UE's capabilities and the number of symbols received for the DCI, the timing of the UE decoding the DCI indicating the TCI state for A-CSI-RS can vary. For simplicity of illustration, Figure 7 PDCCH DCI 410, A-CSI-RS 420, and CORESET in separate frequency sections are shown, but it will be appreciated that PDCCH DCI 410, A-CSI-RS 420, and CORESET can be configured to occupy any suitable time and / or frequency resources within a time slot.

[0088] As indicated by DCI 750 in slot 2, the UE may fail to decode the DCI indicating QCL type-D for receiving A-CSI-RS, causing the timing offset between the PDCCH DCI and A-CSI-RS to exceed a threshold. In this case, the UE can determine whether any other downlink channel or signal was received during the same symbol of A-CSI-RS (i.e., slot 2, symbol j). If no such channel or signal exists, the UE can determine whether any CORESET was configured in the previous slot. If no such CORESET was configured, the UE can select the TCI state associated with the most recently received downlink signal as QCL type-D.

[0089] If a CORESET was configured in a previous time slot, such as CORESET 730 and 740 configured in time slot 1, the UE can determine whether the QCL type-D is available for the CORESET with the lowest CORESET-ID—which is CORESET 730 with ID1; if it is not available, the UE considers the next lowest CORESET with ID, which is CORESET 740 with ID2. If CORESET 740 is indeed available, the UE applies the QCL type-D configuration associated with its TCI state for receiving A-CSI-RS. Alternatively, if none of the CORESET's TCI states are available, the UE can select an available QCL associated with the configured or active TCI state with the lowest index as the QCL type-D configuration.

[0090] Figure 8 This is a flowchart of a method 800 for determining the QCL of A-CSI-RS according to some aspects of this disclosure. The steps of method 800 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable components for performing these steps. For example, a wireless communication device such as UE 115 can utilize one or more components, such as processor 502, memory 404, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to perform the steps of method 800. Method 800 can be employed as described above. Figure 1-7 A similar mechanism described in [the document / document].

[0091] First, at box 810, the UE determines whether the timing offset between receiving the PDCCH DCI indicating the TCI state for A-CSI-RS and receiving A-CSI-RS is greater than a threshold. If the answer is yes (Y), the UE proceeds to box 815 and decodes the PDCCH DCI before receiving A-CSI-RS, using the TCI state indicated therein to receive A-CSI-RS. If the answer is no (N), the UE proceeds to box 820.

[0092] At box 820, the UE determines whether there is any other downlink channel or signal with a TCI state known to the UE and which will be received in the same symbol as A-CSI-RS. If the answer is yes (Y), the UE proceeds to box 825 and selects the QCL configuration associated with the TCI state of that downlink channel / signal as the QCL type-D configuration for receiving A-CSI-RS. If the answer is no (N), the UE proceeds to box 830.

[0093] At box 830, the UE determines whether any CORESET is configured in the monitored search space. In some cases, the UE may be configured with a primary cell and a secondary cell, where the secondary cell may be configured with A-CSI-RS but may not have a CORESET configured. If the answer is no (N), the UE proceeds to box 835 and selects a QCL configuration based on the available TCI state of any most recent downlink channel or signal; or, if the answer is no (N), the UE may proceed to box 860, as described below. If the answer is yes (Y), the UE proceeds to box 840.

[0094] At box 840, the UE determines whether the QCL configuration associated with the CORESET having the lowest CORESET-ID is available. If the answer is yes (Y), the UE proceeds to box 845 and selects the QCL configuration associated with that CORESET as the QCL type-D configuration for receiving A-CSI-RS. If the answer is no (N), the UE proceeds to box 850.

[0095] At box 850, the UE determines whether a CORESET with the next lowest ID (if configured) is available. If the answer is yes (Y), the UE proceeds to box 855 and selects the QCL configuration associated with that CORESET as the QCL type-D configuration for receiving A-CSI-RS. If the answer is no (N), in box 852 the UE considers the next CORESET with the next lowest ID, if available. At box 852, if the CORESET with the next lowest ID is available (Y), the UE returns to box 850 to consider whether that CORESET is available. If no other available CORESET (e.g., a CORESET configured in an active BWP or in the monitored search space) (N), the UE proceeds to box 860; or, if it is determined that no other available CORESET (N) exists, the UE may proceed to box 835, as described above.

[0096] At box 860, the UE determines whether the configuration or active TCI state with the lowest TCI state ID is available. If the answer is yes (Y), the UE proceeds to box 865 and selects the QCL configuration associated with that configuration or active TCI state as the QCL type-D configuration for receiving A-CSI-RS. If the answer is no (N), the UE proceeds to box 870.

[0097] At box 870, the UE determines whether a configuration or active TCI state with the next lowest ID is available. If the answer is yes (Y), the UE proceeds to box 875 and selects the QCL configuration associated with that TCI state as the QCL type-D configuration for receiving A-CSI-RS. If the answer is no (N), the UE considers the next active or configured TCI state with the next lowest ID at box 872 and returns to box 870.

[0098] Figure 9 This is a flowchart of a method 900 for determining the QCL of A-CSI-RS according to some aspects of this disclosure. The steps of method 900 can be performed by a computing device of a wireless communication device (e.g., a processor, processing circuitry, and / or other suitable components) or other suitable components for performing these steps. For example, a wireless communication device such as UE 115 can utilize one or more components, such as processor 502, memory 504, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to perform the steps of method 900, which can be implemented as described above. Figure 1-8 A similar mechanism described in [the document / document].

[0099] For example, in block 910, the UE determines a QCL configuration, such as QCL type-D, based on the transmit beam direction to be used for transmission during a first time period, for receiving a reference signal during that first time period. In block 920, the UE uses a first receive beam direction to receive the reference signal based on the QCL configuration, while simultaneously transmitting a first communication signal in the common frequency band using the same transmit beam direction during the first time period.

[0100] In some cases, the reference signal also includes an aperiodic channel state information reference signal (A-CSI-RS).

[0101] In some cases, QCL configuration is associated with QCL-Type D. In some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to configure downlink beam reception direction for receiving A-CSI-RS using QCL-Type D.

[0102] In some cases, determining the QCL configuration includes the UE determining whether a second communication signal associated with a Transmission Configuration Indication (TCI) state is scheduled as a reference signal during a first time period; and in response to determining that the second communication signal associated with the TCI state is scheduled as the reference signal during the first time period, the UE selects a first receive beam direction based on the TCI state. In some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to receive the second communication signal and the reference signal in the same time period (e.g., the same symbol 206).

[0103] In some cases, determining the QCL configuration further includes the UE determining whether a second receive beam direction associated with a control resource set (CORESET) in a second time period prior to the first time period is available for concurrent reception with the transmit beam direction. In some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to receive the CORESET and reference signal and determine the CORESET with the lowest CORESET-ID. The UE may also utilize components to determine whether a downlink beam direction associated with QCL type-D of the CORESET with the lowest CORESET-ID is available, for example, based on the transmit beam direction to be used by the UE for transmission during the first time period.

[0104] In some cases, the UE is also configured to determine whether the second receive beam direction associated with the CORESET is available for concurrent reception with the transmit beam direction in response to determining that there is no second communication signal associated with a Transmission Configuration Indication (TCI) state scheduled as a reference signal in the first time period. In some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to determine whether there is no other downlink signal having a known TCI state scheduled as A-CSI-RS in the same time period (e.g., symbol), in which case the UE considers determining the QCL configuration based on the CORESET configured in the previous time slot.

[0105] In some cases, the UE further determines whether a second receive beam direction associated with CORESET can be used for concurrent reception with the transmit beam direction based on anticipated interference between the second receive beam direction and the transmit beam direction. In some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512, and one or more antennas 516, to determine the presence of anticipated interference based on, for example, the downlink beam direction or pattern used for receiving A-CSI-RS and the uplink beam direction or pattern used by the UE for transmission in the same symbol in full-duplex mode.

[0106] In some cases, the UE may also select the second receive beam direction as the first receive beam direction based on the determination that the second receive beam direction associated with CORESET in the second time period is available for concurrent reception with the transmit beam direction.

[0107] In some cases, the UE further determines whether a second receive beam direction associated with a CORESET can be used for concurrent reception with a transmit beam direction, which includes the UE searching for a second receive beam direction from one or more receive beam directions associated with one or more CORESETs during a second time period, wherein the search is from the CORESET with the lowest ID among one or more CORESETs to the CORESET with the highest ID among one or more CORESETs.

[0108] For example, in some cases, the UE may utilize one or more components, such as processor 502, A-CSI-RS communication module 508, transceiver 510, modem 512 and one or more antennas 516, to search for QCL configuration from the lowest CORESET ID to the highest CORESET ID.

[0109] In some cases, the UE further searches for a second receive beam direction from one or more receive beam directions associated with one or more CORESETs in the active bandwidth portion (BWP).

[0110] In some cases, the UE further determines the QCL configuration, including by determining whether the second receive beam direction associated with the Transmission Configuration Indicator (TCI) is available for concurrent reception with the transmit beam direction.

[0111] For example, the UE may further determine whether a second receive beam direction associated with TCI can be used concurrently with a transmit beam direction in response to determining that there is no receive beam direction associated with one or more control resource sets (CORESET) in a second time period that can be used concurrently with the transmit beam direction before the first time period.

[0112] Optionally, the UE may further select the second receiving beam direction as the first receiving beam direction based on determining that the second receiving beam direction associated with TCI can be received concurrently with the transmitting beam direction.

[0113] In some cases, the UE further determines whether the second receive beam direction associated with the TCI can be used concurrently with the transmit beam direction in response to determining that there is no receive beam direction associated with one or more control resource sets (CORESET) in a second time period that can be used concurrently with the transmit beam direction, the second time period preceding the first time period.

[0114] In some cases, the UE may also select the second receive beam direction as the first receive beam direction based on the determination that the second receive beam direction associated with the TCI is available for concurrent reception with the transmit beam direction. Optionally, the TCI has the lowest state ID among one or more active TCIs. Alternatively, the TCI has the lowest state ID among one or more configured TCIs. The active TCIs and / or configured TCIs can be similar to those described above. Figure 4B The discussion covers the configured TCI state and the activated TCI state.

[0115] In some cases, the UE also receives the second communication signal using the first receive beam direction during a second time period prior to the first time period, wherein the determination of the QCL configuration is also based on the first receive beam direction for receiving the second communication signal during the second time period prior to the first time period.

[0116] Optionally, the QCL configuration is also determined based on reference signals configured for cells without a control resource set (CORESET).

[0117] In some cases, the UE's determination of the QCL configuration is also based on the time offset between the transmission time of the triggering downlink control information (DCI) associated with the reference signal and the transmission time of the reference signal.

[0118] Further embodiments of this disclosure include a non-transitory computer-readable medium having program code recorded thereon. The non-transitory computer-readable medium includes code for causing a UE to determine a QCL configuration for receiving a reference signal during a first time period based on a transmit beam direction for transmission during the first time period, and code for causing the UE to receive the reference signal from a BS using a first receive beam direction based on the QCL configuration, while simultaneously transmitting a first communication signal in a common band using the transmit beam direction during the first time period.

[0119] The non-transitory computer-readable medium may also include one or more of the following features. For example, the non-transitory computer-readable medium includes code for configuring a UE receiving a reference signal to receive A-CSI-RS from a BS. QCL configuration is associated with QCL-Type D. Code for configuring a UE determining the QCL configuration to determine whether a second communication signal associated with a TCI state is scheduled as a reference signal in a first time period, and the non-transitory computer-readable medium also includes code for: causing the UE to select a first receive beam direction based on the TCI state in response to determining that the second communication signal associated with the TCI state is scheduled as the reference signal in the first time period. Code for configuring a UE determining the QCL configuration to be available for concurrent reception with a transmit beam direction in a second time period prior to the first time period, associated with a CORESET.

[0120] Code used to: configure a UE that determines whether a second receive beam direction associated with the CORESET is available for concurrent reception with the transmit beam direction to respond to determining that there is no second communication signal associated with a TCI state scheduled as a reference signal in the first time period. Code used to: configure a UE that determines whether a second receive beam direction associated with the CORESET is available for concurrent reception with the transmit beam direction to determine whether a second receive beam direction is available based on expected interference between the second receive beam direction and the transmit beam direction. Code used to: select a second receive beam direction as the first receive beam direction based on determining that the second receive beam direction associated with the CORESET in the second time period is available for concurrent reception with the transmit beam direction. Code used to: configure a UE that determines whether a second receive beam direction associated with the CORESET is available for concurrent reception with the transmit beam direction to search for a second receive beam direction from one or more receive beam directions associated with one or more CORESETs in the second time period, wherein the search is from the CORESET with the lowest ID among one or more CORESETs to the CORESET with the highest ID among one or more CORESETs. The code is used for the following: During a second time period, a UE that searches for a second beam direction associated with one or more CORESETs is configured to search for a second receive beam direction from one or more receive beam directions associated with one or more CORESETs in an active BWP.

[0121] Code for determining whether a UE with a QCL configuration is available for concurrent reception with a transmit beam direction is configured to determine whether a second receive beam direction associated with a Transmission Configuration Indicator (TCI) is available for reception with the transmit beam direction. Code for determining whether a UE with a TCI-associated second receive beam direction is available for concurrent reception with a transmit beam direction is configured to determine whether a second receive beam direction is available for reception in response to determining that no receive beam direction associated with one or more CORESETs in a second time period is available for concurrent reception with the transmit beam direction, the second time period preceding the first time period. The non-transitory computer-readable medium includes code for causing the UE to select the second receive beam direction as the first receive beam direction based on the determination that the second receive beam direction associated with the TCI is available for concurrent reception with the transmit beam direction. The TCI has the lowest state ID among one or more active TCIs. The TCI has the lowest state ID among one or more configured TCIs.

[0122] The non-transitory computer-readable medium includes code for: causing the UE to receive a second communication signal using the first receive beam direction during a second time period prior to the first time period, wherein the code includes: causing the UE determining the QCL configuration to be configured to determine the QCL configuration based on the first receive beam direction for receiving the second communication signal during the second time period prior to the first time period; code includes: causing the UE determining the QCL configuration to be configured to determine the QCL configuration based on a reference signal configured for a cell without a CORESET; and code includes: causing the UE determining the QCL configuration to be configured to determine the QCL configuration based on the time offset between the transmission time of the trigger DCI associated with the reference signal and the transmission time of the reference signal.

[0123] Information and signals can be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0124] The various illustrative boxes and modules described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The 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 working in conjunction with a DSP core, or any other such configuration).

[0125] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the above-described functions may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that different parts of the functions are implemented at different physical locations. Moreover, as used herein, items included in the claims, in the list of items, or items (e.g., a list of items addressed by phrases such as "at least one" or "one or more") indicate an inclusive list, such that a list such as [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0126] As those skilled in the art will understand through their knowledge of the specific application at hand and depending on the particular application, substitutions and variations may be made without departing from the spirit and scope of this disclosure. Numerous modifications may be made to the materials, apparatus, configuration, and method of use of the devices of this disclosure. Therefore, the scope of this disclosure should not be limited to the specific embodiments shown and described herein, as they are by way of example only and should not be fully equivalent to the appended claims and their functional equivalents.

Claims

1. A method for wireless communication, comprising: The user equipment (UE) uses the uplink transmit beam direction used for uplink transmission during a first time period to determine whether any receive beam direction associated with one or more control resource sets (CORESET) in a second time period is available for receiving a reference signal during the first time period, wherein the second time period precedes the first time period; In response to determining that no receive beam direction associated with the one or more CORESETs is available during the second time period, the UE determines a quasi-co-location (QCL) configuration for receiving the reference signal during the first time period based on the uplink transmit beam direction to be used for the uplink transmission during the first time period; and The UE receives the reference signal from the base station (BS) using a first receive beam direction based on the determined QCL configuration, and simultaneously transmits a first communication signal in the common frequency band using the uplink transmit beam direction during the first time period.

2. The method according to claim 1, wherein, The QCL configuration is associated with QCL type D, and receiving the reference signal includes: The UE receives an aperiodic channel state information reference signal (A-CSI-RS) from the BS.

3. The method according to claim 1, wherein: Determining the QCL configuration includes: The UE determines whether a second communication signal associated with the Transmission Configuration Indicator (TCI) state is scheduled during the first time period; and The method further includes: In response to determining that the second communication signal associated with the TCI state is scheduled as the reference signal during the first time period, the UE selects the first receiving beam direction based on the TCI state.

4. The method according to claim 1, wherein, Determining whether any receive beam direction associated with the one or more CORESETs can be used to receive the reference signal includes: The UE determines whether the second receive beam direction associated with one or more CORESETs in the second time period is available for concurrent reception with the uplink transmit beam direction.

5. The method according to claim 4, wherein, The determination of whether the second receive beam direction associated with the CORESET can be used for concurrent reception with the uplink transmit beam direction is in response to determining that no second communication signal associated with the Transmission Configuration Indicator (TCI) state is scheduled during the first time period.

6. The method according to claim 4, wherein, The determination of whether the second receive beam direction associated with the CORESET can be used for concurrent reception with the uplink transmit beam direction is based on the expected interference between the second receive beam direction and the uplink transmit beam direction.

7. The method according to claim 4, further comprising: Based on the determination that the second receive beam direction associated with the CORESET during the second time period can be received concurrently with the uplink transmit beam direction, the UE selects the second receive beam direction as the first receive beam direction.

8. The method according to claim 7, wherein, Determining whether the second receive beam direction associated with the CORESET can be used for concurrent reception with the uplink transmit beam direction includes: The UE searches for the second receive beam direction from one or more receive beam directions associated with the one or more CORESETs during the second time period, wherein the search is from the CORESET with the lowest ID among the one or more CORESETs to the CORESET with the highest ID among the one or more CORESETs, and the one or more receive beam directions are associated with the one or more CORESETs in the active bandwidth portion (BWP).

9. The method according to claim 1, wherein, Determining the QCL configuration includes: The UE determines whether the second receive beam direction associated with the Transmission Configuration Indicator (TCI) can be used for concurrent reception with the uplink transmit beam direction.

10. The method of claim 9, further comprising: Based on the determination that the second receive beam direction associated with the TCI can be received concurrently with the uplink transmit beam direction, the UE selects the second receive beam direction as the first receive beam direction, wherein the TCI has the lowest state ID among at least one of one or more active TCIs or one or more configured TCIs.

11. The method according to claim 1, further comprising: The UE receives the second communication signal using the first receiving beam direction during the second time period prior to the first time period. The determination of the QCL configuration is further based on the first receive beam direction and the reference signal, wherein the first receive beam direction is used to receive the second communication signal during a second time period prior to the first time period, and the reference signal is configured for cells without a control resource set (CORESET).

12. The method according to claim 1, wherein, The determination of the QCL configuration is also based on the time offset between the transmission time of the triggering downlink control information (DCI) associated with the reference signal and the transmission time of the reference signal.

13. A user equipment (UE), comprising: The processor is configured as follows: Using the uplink transmit beam direction used for uplink transmission during the first time period, determine whether any receive beam direction associated with one or more control resource sets (CORESET) in the second time period is available for receiving a reference signal during the first time period, wherein the second time period precedes the first time period; In response to determining that no receive beam direction associated with the one or more CORESETs is available, a quasi-co-location (QCL) configuration for receiving the reference signal during the first time period is determined based on the uplink transmit beam direction to be used for the uplink transmission during the first time period; and A transceiver configured to receive the reference signal from a base station (BS) using a first receive beam direction based on a determined QCL configuration, and simultaneously transmit a first communication signal in a common frequency band using the uplink transmit beam direction during the first time period.

14. The UE according to claim 13, wherein, The QCL configuration is associated with QCL type D, and the transceiver configured to receive the reference signal is configured as follows: Receive aperiodic channel state information reference signal (A-CSI-RS) from the BS.

15. The UE according to claim 13, wherein: The processor configured to determine the QCL configuration is configured as follows: Determine whether the second communication signal associated with the Transmission Configuration Indicator (TCI) state was scheduled as the reference signal during the first time period; and The processor is also configured to: In response to determining that the second communication signal associated with the TCI state is scheduled during the first time period, the first receiving beam direction is selected based on the TCI state.

16. The UE according to claim 13, wherein, The processor configured to determine the QCL configuration is configured as follows: Determine whether the second receive beam direction associated with a CORESET in one or more CORESETs during the second time period is available for concurrent reception with the uplink transmit beam direction.

17. The UE according to claim 16, wherein, The processor is also configured to: Based on the determination that the second receive beam direction associated with the CORESET during the second time period can be received concurrently with the uplink transmit beam direction, the second receive beam direction is selected as the first receive beam direction.

18. The UE according to claim 17, wherein, The processor, configured to determine whether the second receive beam direction associated with the CORESET is available for concurrent reception with the uplink transmit beam direction, is configured to: The second receive beam direction is searched from one or more receive beam directions associated with the one or more CORESETs during the second time period, wherein the search is from the CORESET with the lowest ID among the one or more CORESETs to the CORESET with the highest ID among the one or more CORESETs, and the one or more receive beam directions are associated with the one or more CORESETs in the active bandwidth portion (BWP).

19. The UE according to claim 13, wherein, The processor configured to determine the QCL configuration is configured as follows: Determine whether the second receive beam direction associated with the Transmission Configuration Indicator (TCI) is available for concurrent reception with the uplink transmit beam direction.

20. The UE according to claim 19, wherein, The processor is also configured to: Based on the determination that the second receive beam direction associated with the TCI can be received concurrently with the uplink transmit beam direction, the second receive beam direction is selected as the first receive beam direction, wherein the TCI has the lowest state ID among at least one of one or more active TCIs or one or more configured TCIs.

21. The UE according to claim 13, wherein, The processor configured to determine the QCL configuration is configured as follows: The QCL configuration is determined based on the time offset between the transmission time of the triggering downlink control information (DCI) associated with the reference signal and the transmission time of the reference signal.

22. A user equipment (UE), comprising: A unit for determining, using the uplink transmit beam direction used for uplink transmission during a first time period, whether any receive beam direction associated with one or more control resource sets (CORESET) in a second time period is available for receiving a reference signal during the first time period, wherein the second time period precedes the first time period; A unit for determining a quasi-co-location (QCL) configuration for receiving the reference signal during the first time period based on the uplink transmit beam direction to be used for the uplink transmission during the first time period, in response to determining that no receive beam direction associated with the one or more CORESETs is available; and A unit for receiving the reference signal from a base station (BS) using a first receive beam direction based on a determined QCL configuration, and simultaneously transmitting a first communication signal in a common frequency band using the uplink transmit beam direction during the first time period.

23. The UE according to claim 22, wherein, The QCL configuration is associated with QCL type D, and the unit for receiving the reference signal is configured as follows: Receive aperiodic channel state information reference signal (A-CSI-RS) from the BS.

24. The UE according to claim 22, wherein, The unit used to determine whether any receive beam direction associated with the one or more CORESETs is available is configured to: Determine whether the second receive beam direction associated with a CORESET in one or more CORESETs during the second time period is available for concurrent reception with the uplink transmit beam direction.

25. The UE according to claim 24, further comprising: The second receive beam direction is selected as a unit of the first receive beam direction based on the determination that the second receive beam direction associated with the CORESET during the second time period is available for concurrent reception with the uplink transmit beam direction.

26. The UE according to claim 25, wherein, The unit for selecting the direction of the second receiving beam includes: A unit for searching for the second receive beam direction from one or more receive beam directions associated with the one or more CORESETs during the second time period, wherein the search is from the CORESET with the lowest ID among the one or more CORESETs to the CORESET with the highest ID among the one or more CORESETs, wherein the one or more receive beam directions are associated with the one or more CORESETs in the active bandwidth portion (BWP).

27. The UE according to claim 22, wherein, The unit used to determine the QCL configuration is configured as follows: Determine whether the second receive beam direction associated with the Transmission Configuration Indicator (TCI) is available for concurrent reception with the uplink transmit beam direction.

28. The UE according to claim 27, wherein, The unit for determining the QCL configuration is configured to determine whether the second receive beam direction associated with the TCI is available for concurrent reception with the uplink transmit beam direction in response to determining that there is no receive beam direction associated with the one or more CORESETs available for concurrent reception with the uplink transmit beam direction during the second time period.

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