Beam management for partial beams corresponding to user equipment

Abstract

Embodiments of the present disclosure provide uplink and downlink beam management for partial beam correspondence user equipment.Other embodiments are also described and claimed.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 758,136, entitled “Beam Management for Partial Beam Correspondence User Equipment,” filed on November 9, 2018. The disclosure of this application is hereby incorporated by reference in its entirety. Technical Field

[0003] Embodiments of the present invention generally relate to the field of wireless communication technology. Background Art

[0004] Mobile communications have evolved significantly. The next generation of wireless communication systems, 5G or New Radio (NR), will provide access to information and data sharing anytime, anywhere for a variety of users and applications. NR is a unified network / system designed to meet very different and sometimes conflicting performance dimensions and services. Such different multi-dimensional requirements are driven by different services and applications. In general, NR will evolve based on 3GPP LTE-Advanced with the addition of potential new radio access technologies (RATs) to enrich people's lives with better solutions for simple and seamless wireless connectivity. NR will enable wireless connectivity to provide fast, rich content and services. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The embodiment will be more easily understood by the following specific implementation in conjunction with the accompanying drawings. In order to facilitate this description, similar reference numerals represent similar structural elements. In each figure of the accompanying drawings, the embodiment is shown by way of example and not limitation.

[0006] Figure 1 A network according to some embodiments is shown.

[0007] Figure 2 An operational flow / algorithm structure according to some embodiments is shown.

[0008] Figure 3 A timing diagram according to some embodiments is shown.

[0009] Figure 4 An operational flow / algorithm structure according to some embodiments is shown.

[0010] Figure 5 An example of an exemplary wireless network according to various embodiments herein is schematically illustrated.

[0011] Figure 6Exemplary components of a baseband circuit and a radio front end module (RFEM) are shown according to various embodiments.

[0012] Figure 7 is a block diagram illustrating components capable of reading instructions from a machine-readable medium or computer-readable medium (eg, a non-transitory machine-readable storage medium) and performing any one or more of the methodologies discussed herein, according to some example embodiments. DETAILED DESCRIPTION

[0013] The following specific embodiments relate to the accompanying drawings. The same figure numbers may be used to identify the same or similar elements in different drawings. In the following description, for the purpose of illustration and not limitation, specific details, such as specific structures, architectures, interfaces, technologies, etc., are described to provide a thorough understanding of the various aspects of each embodiment. However, it will be apparent to those skilled in the art who benefit from the present disclosure that the various aspects of each embodiment can be practiced in other examples that deviate from these specific details. In some cases, the description of well-known equipment, circuits, and methods is omitted so that the description of the various embodiments will not be obscured by unnecessary details. For the purpose of this document, the phrases "A or B" and "A / B" refer to (A), (B), or (A and B).

[0014] Figure 1 A network 100 is shown according to some embodiments. The network 100 may be a radio access network including an access node 104 and a user equipment (UE) 108. The access node 104 and the UE 108 may be capable of uplink (UL) or downlink (DL) beamforming, which may be facilitated by uplink or downlink beam management.

[0015] Uplink beam management may involve the UE 108 using spatial domain transmit filters (also referred to as "transmit (Tx) beams") based on indicated control or reference signals (e.g., sounding reference signals (SRS), channel state information-reference signals (CSI-RS), or synchronization signal blocks (SSBs)). For example, consider the use of CSI-RS / SSBs. The access node 104 may use beam 112 as a DL Tx beam to transmit CSI-RS / SSBs. The UE 108 may use different spatial domain receive filters (also referred to as "receive (Rx) beams") to measure the received CSI-RS / SSBs and determine that beam 112 is the best DL Rx beam for receiving the CSI-RS / SSBs (e.g., based on some received quality metrics).

[0016] If UE 108 supports beam correspondence, UE 108 may also use beam 116 as the best UL Tx beam. That is, UE 108 may transmit CSI-RS / SSB through beam 112 using the same spatial domain filter used by access node 104 in order to transmit uplink signals to access node 104 using beam 116. Beam correspondence may also be referred to as "full beam correspondence", which may mean that the transmit beam and the receive beam may be the same for a channel.

[0017] However, in some embodiments, UE 108 may not support full beam correspondence, but only partial beam correspondence. In various embodiments, according to some embodiments, UE 108 may provide access node 104 with an indication of whether UE 108 supports full beam correspondence or partial beam correspondence as part of a UE capability report.

[0018] With partial beam correspondence, the best transmit beam and receive beam may be related but not identical. For example, if beam 116 is determined to be the best DL receive beam and UE 108 only supports partial beam correspondence, access node 104 may determine that beam 120 related to beam 116 is the best UL transmit beam.

[0019] The UE corresponding to the partial beam may not perfectly reproduce the best receive beam for uplink transmission obtained in the downlink. Due to the error of the specific implementation, there may be multiple candidate uplink beams that may be the best for the uplink. In this case, the UE 108 can use the candidate uplink beam to transmit multiple SRS resources, and the access node 104 can determine which beam is the best for the uplink. The UE 108 can also know which candidate beams for the uplink are related to the obtained receive beamforming direction. In some embodiments, the UE 108 may be configured with relevant information.

[0020] Various embodiments describe management of uplink beams for UEs supporting partial beam correspondence. The present disclosure provides embodiments that support uplink beam management for UEs utilizing partial beam correspondence. Embodiments herein include mechanisms for maintaining the same understanding of the beam management process between UE 108 and access node 104, and mechanisms for beam management using SRS. For example, some embodiments provide mutual understanding of whether the SRS used for beam management is used for UE beam refinement or access node beam refinement. Some embodiments describe reducing the overhead and delay of downlink beam management by including an indication of SRS in a transmission configuration indication (TCI). Another problem that occurs is whether UE 108 should use the same beam to receive downlink signals or a refined (e.g., related) beam when SRS is indicated.

[0021] Some embodiments describe UL beam management for partial beam correspondence UEs.

[0022] In one embodiment, the access node 104 and the UE 108 may maintain the same understanding of whether the SRS resource or SRS resource set used for beam management is for access node beam refinement or UE beam refinement. In some embodiments, the access node 104 may transmit an indication of the beam to be used for the SRS resource to the UE 108 in the spatial relationship information. If the SRS resource or SRS resource set is used for access node beam refinement, the UE 108 may use the beam indicated by the spatial relationship information as a Tx beam to transmit the SRS resources in the SRS resource set; otherwise, the UE 108 may apply different beams in different SRS resources or symbols, and these different beams are related to the beam indicated by the spatial relationship information.

[0023] Figure 2 An operational flow / algorithm structure 200 is shown according to some embodiments. The operational flow / algorithm structure 200 may be performed by the UE 108 or a component thereof (eg, baseband circuitry).

[0024] The operation flow / algorithm structure 200 may include: at 204, reading the spatial relationship information configured for each SRS resource in the SRS resource set. As used herein, an SRS resource may be the location of an SRS in the time domain and the frequency domain. Factors defining the location and bandwidth of an SRS and concepts related to SRS resources and SRS resource sets may be defined in accordance with the description provided in the Third Generation Partnership Project (3GPP) Technical Specification (TS) 38.211v15.3.0 (2018-09-27). The spatial relationship information may be provided from the access node 104 to the UE 108. In some embodiments, the spatial relationship information may be provided in higher layer signaling, such as, but not limited to, radio resource control (RRC) or MAC CE signaling.

[0025] The operation flow / algorithm structure 200 may further include determining whether the spatial relationship information is the same or different for all SRS resources in the set at 208. Specifically, it may be determined whether the spatial domain filters to be used for the SRS resources in the SRS resource set are the same / different.

[0026] The spatial domain filter may be the same as the analog beamforming used by the UE. Based on the spatial relationship information indicated by the access node 104, the UE 108 may determine the spatial filter / analog beamforming to use for uplink transmissions. Thus, the signaled spatial relationship information may define the spatial filter / analog beamforming of the UE 108. The spatial relationship information signaling may include an identification of a reference signal used for analog beam acquisition.

[0027] If it is determined at 208 that the spatial relationship information is the same for all SRS resources in the group, then the operational flow / algorithm structure 200 may proceed to applying the transmit beam of the SRS resource associated with the beam indicated by the spatial relationship information for each SRS resource at 212. For example, consider that the SRS resource set includes SRS resources #0 and #1. If the spatial relationship information configures spatial domain filter #0 for both SRS resources #0 and #1 (e.g., the spatial domain filter corresponds to Figure 1 116), the UE 108 may determine a spatial domain filter #1 associated with the spatial domain filter #0 (eg, the spatial domain filter corresponding to Figure 1 Beam 120) should be used for transmission of SRS resources #0 and #1.

[0028] In some embodiments, UE 108 may use a different beam for the SRS resources if a different beam is associated with the indicated beam. Figure 1 If spatial domain filter #2 of beam 124 is also correlated with spatial domain filter #0, UE 108 may transmit SRS resource #0 using spatial domain filter #1 and transmit SRS resource #1 using spatial domain filter #2.

[0029] If it is determined at 208 that the spatial relationship information is different for all SRS resources in the set, the operational flow / algorithm structure 200 may proceed to apply the same transmit beam indicated by the spatial relationship information for each SRS resource of the set at 216. For example, assuming that the SRS resource set includes SRS resources #0-#1 as described above, and the spatial relationship information configures spatial domain filter #0 for SRS resource #0 and spatial domain filter #1 for SRS resource #1, the UE 108 may determine that spatial domain filter #0 should be used for transmission of SRS resource #0, and spatial domain filter #1 should be used for transmission of SRS resource #1.

[0030] The operation flow / algorithm structure 200 may be based on the assumption that the UE 108 expects all SRS resources in the set to be configured with the same spatial relationship information or different spatial relationship information. However, in some embodiments, the spatial relationship information may be the same only for a subset of SRS resources in the set. In these embodiments, the UE may apply the same Tx beam as indicated by the spatial relationship information to SRS resources with different spatial relationship information, and may apply the related Tx beam to the SRS resources of the subset with the same spatial relationship information.

[0031] Alternatively, if the spatial relationship information is the same only for a subset of SRS resources of the set, the UE 108 may apply the Tx beam associated with the beam indicated by the spatial relationship information to all SRS resources of the set. For example, consider that SRS resources #0-#3 are configured with spatial domain filter #0; and SRS resource #4 is configured with spatial domain filter #2. In this case, SRS resources #0-#3 may each be configured with spatial domain filter #1 associated with spatial domain filter #0, and SRS resource #4 may be configured with spatial domain filter #3 associated with spatial domain filter #2.

[0032] In some embodiments, the operational flow / algorithm structure 200 can be applied to SRS for beam management, codebook or non-codebook beam management, or antenna switching. In addition, in some embodiments, the operational flow / algorithm structure 200 can be applied to beam management using periodic, semi-persistent, or periodic SRS.

[0033] Some embodiments describe downlink beam management for partial beam correspondence UEs.

[0034] In some embodiments, the SRS may be indicated in a transmission configuration indication (TCI) state configured or indicated by control signaling (e.g., downlink control information (DCI), RRC, MACCE, etc.) for receiving downlink signals such as but not limited to CSI-RS, PDCCH, or PDSCH. Figure 3 Included is a timing diagram 300 showing an example of timing for SRS based TCI indications according to some embodiments.

[0035] UE 108 may sequentially transmit SRS resource #0 using multiple spatial domain filters (corresponding to transmit beams #1, #2, and #3) at 304, 308, and 312. At 316, access node 104 may transmit control signaling for receiving a downlink signal (e.g., PDCCH / PDSCH / CSI-RS). The control signaling may have or otherwise be configured to indicate a TCI state for SRS resource #0. In some embodiments, the TCI state may indicate a particular transmission of SRS resource #0 as the latest transmission of SRS resource #0 at least K slots / symbols prior to receiving the downlink signal. In some embodiments, K may be an integer based on UE capabilities. In this way, the TCI state may also provide an indication of transmit beam #2.

[0036] In the first option, when the spatial relationship information is based on a downlink reference signal, the UE 108 may use a receive beam associated with the indicated transmit beam, or a receive beam indicated by the spatial relationship information for the SRS. For example, if beam #4 is associated with beam #2, the UE 108 may use receive beam #4 to receive downlink transmissions from the access node 104. As another example, consider that an SSB or CSI-RS with a certain ID (e.g., ID=#1) is configured as a source reference signal in the spatial relationship information of an SRS resource with a certain ID (e.g., ID=#2). Such a spatial relationship may be used by the UE 108 as a reference transmit beam for SRS transmission, where a local beam is scanned around a beam acquired from a downlink based on the SSB or CSI-RS with the ID. If the SRS resource is also configured in the TCI state for another downlink signal (e.g., PDCCH / PDSCH), the QCL type D information (e.g., receive beamforming at the UE) used for reception of that DL signal (e.g., PDCCH / PDSCH) will be directly determined by the SSB or CSI-RS with this ID.

[0037] In a second option, the UE 108 may use the same receive beam as the indicated Tx beam. For example, the UE 108 may use receive beam #2 which is equal to transmit beam #2.

[0038] In some embodiments, whether UE 108 should use the first option or the second option may be predefined or determined by the corresponding downlink signal type or the configuration of the downlink signal. For example, in one embodiment, if CSI-RS repetition = on, the first option should be used, and for other cases, the second option should be used.

[0039] Figure 4 An operational flow / algorithm structure 400 is shown according to some embodiments. The operational flow / algorithm structure 400 may be performed by the UE 108 or a component thereof (eg, baseband circuitry within the UE 108).

[0040] The operational flow / algorithm structure 400 may include, at 404, determining spatial relationship information. The spatial relationship information may correspond to a CSI resource in a CSI resource set. In some embodiments, the spatial relationship information may include a spatial domain filter for each CSI resource in the CSI resource set. In some embodiments, the spatial relationship information may be provided to the UE 108 by one or more configuration messages from the access node 104.

[0041] The operational flow / algorithm structure 400 may also include, at 408, selecting a spatial transmit filter based on the determination of the spatial relationship information. In some embodiments, the spatial transmit filter for the SRS resource may be the spatial relationship information indicated for the SRS resource. In other embodiments, the spatial transmit filter for the SRS resource may be related to the spatial relationship information indicated for the SRS resource. The selection of the spatial transmit filter based on the determination of the spatial relationship information may be similar to the above reference to Figure 2 described.

[0042] The operational flow / algorithm structure 400 may also include, at 412, causing an uplink transmission to be transmitted using the spatial transmit filter selected at 408. In some embodiments, the uplink transmission may be, for example, a physical uplink control channel transmission, a physical uplink shared channel transmission, or the like.

[0043] Figure 5 An exemplary wireless network 500 (hereinafter referred to as "network 100") according to various embodiments herein is schematically illustrated. Network 500 may include a UE 505 in wireless communication with an AN 510. UE 505 and AN 510 may be similar to UE 108 and access node 104, respectively, and may be substantially interchangeable with the latter two, respectively.

[0044] In some embodiments, network 500 may be a NR or LTE network. UE 505 may be configured to connect, for example, be communicatively coupled to AN 510 via connection 512. In this example, connection 512 is shown as an air interface to achieve communicatively coupling, and may be consistent with a cellular communication protocol, such as an LTE protocol, a 5GNR protocol operating at millimeter wave and sub-6 GHz, a global system for mobile communications (GSM) protocol, a code division multiple access (CDMA) network protocol, a push-to-talk (PTT) protocol, etc.

[0045] UE 505 is shown as a smart phone (e.g., a handheld touch screen mobile computing device that can connect to one or more cellular networks), but may also include any mobile or non-mobile computing device, such as a personal data assistant (PDA), a pager, a laptop computer, a desktop computer, a wireless handheld terminal, a customer premises equipment (CPE), a fixed wireless access (FWA) device, a vehicle-mounted UE, or any computing device that includes a wireless communication interface. In some embodiments, UE 505 may include an Internet of Things (IoT) UE, which may include a network access layer designed for low-power IoT applications that utilize short-term UE connections. The IoT UE may utilize technologies such as narrowband IoT (NB-IoT), machine-to-machine (M2M), or machine-type communication (MTC) to exchange data with an MTC server or device via a public land mobile network (PLMN), proximity-based services (ProSe) or device-to-device (D2D) communications, a sensor network, or an IoT network. The M2M or MTC data exchange may be a machine-initiated data exchange. The NB-IoT / MTC network describes interconnected NB-IoT / MTC UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure) with ephemeral connections. NB-IoT / MTC UEs may execute background applications (e.g., keep-alive messages, status updates, location-related services, etc.).

[0046] AN 510 may initiate or terminate connection 512. AN 510 may be referred to as a base station (BS), a Node B, an evolved Node B (eNB), a next generation Node B (gNB or ng-gNB), an NG-RAN node, a cell, a serving cell, a neighboring cell, etc., and may include a ground station (e.g., a terrestrial access point) or a satellite station that provides coverage in a geographic area.

[0047] AN 510 may be the first point of contact for UE 505. In some embodiments, AN 510 may fulfill various logical functions including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management, data packet scheduling, and mobility management.

[0048] UE 505 may include protocol processing circuitry 515 that may implement one or more layer operations associated with medium access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), radio resource control (RRC), and non-access stratum (NAS). Protocol processing circuitry 515 may include one or more processing cores (not shown) for executing instructions and one or more memory structures (not shown) for storing program and data information.

[0049] The UE 505 may also include a digital baseband circuit 525, which may implement physical layer (PHY) functions, including one or more of the following: hybrid automatic repeat request acknowledgment (HARQ-ACK) functions, scrambling and / or descrambling, encoding and / or decoding, layer mapping and / or demapping, modulation symbol mapping, received symbol and / or bit metric determination, multi-antenna port precoding and / or decoding, which may include space-time, space-frequency or space coding, reference signal generation and / or detection, preamble sequence generation and / or decoding, synchronization sequence generation and / or detection, control channel signal blind decoding, and one or more of other related functions.

[0050] UE 505 may also include transmit circuitry 535 , receive circuitry 545 , radio frequency (RF) circuitry 555 , and an RF front end (RFFE) 565 , which may include or be connected to one or more antenna panels 575 .

[0051] As used herein, the term "circuit" may refer to, be part of, or include a hardware component such as an electronic circuit, a logic circuit, a processor (shared, dedicated, or group) and / or a memory (shared, dedicated, or group) configured to provide the described functions, an application specific integrated circuit (ASIC), a field programmable device (FPD) (e.g., a field programmable gate array (FPGA), a programmable logic device (PLD), a complex PLD (CPLD), a high capacity PLD (HCPLD), a structured ASIC, or a programmable system on chip (SoC)), a digital signal processor (DSP), etc. In some embodiments, the circuit may execute one or more software or firmware programs to provide at least some of the described functions. In addition, the term "circuit" may also refer to a combination of one or more hardware elements and a program code for performing the functions of the program code (or a combination of circuits used in an electrical or electronic system). In these embodiments, the combination of hardware elements and program code may be referred to as a specific type of circuit.

[0052] In some embodiments, the RF circuit 555 may include multiple parallel RF chains or branches for one or more of transmit or receive functions; each chain or branch may be coupled to an antenna panel 575 .

[0053] In some embodiments, the protocol processing circuit 515 may include one or more instances of control circuits (not shown) to provide control functions for the digital baseband circuit 525 (or simply "baseband circuit 525"), the transmit circuit 535, the receive circuit 545, the RF circuit 555, the RFFE 565, and one or more antenna panels 575.

[0054] UE reception may be established by and via one or more antenna panels 575, RFFE 565, RF circuitry 555, receive circuitry 545, digital baseband circuitry 525, and protocol processing circuitry 515. The one or more antenna panels 575 may receive transmissions from the AN 510 via receive beamforming signals received by multiple antennas / antenna elements of the one or more antenna panels 575.

[0055] Transmissions from AN 510 may be transmit beamformed by antennas of AN 110. In some embodiments, baseband circuitry 525 may include both transmit circuitry 135 and receive circuitry 545. In other embodiments, baseband circuitry 525 may be implemented in separate chips (e.g., one chip including transmit circuitry 135 and another chip including receive circuitry 545) or modules.

[0056] Similar to UE 505 , AN 510 may include protocol processing circuitry 520 , digital baseband circuitry 530 (or simply “baseband circuitry 530 ”), transmit circuitry 540 , receive circuitry 550 , RF circuitry 560 , RFFE 570 , and one or more antenna panels 580 .

[0057] Cell transmission can be established by and via the protocol processing circuit 520, the digital baseband circuit 530, the transmit circuit 540, the RF circuit 560, the RFFE 570, and one or more antenna panels 580. The transmit component of the UE 505 can apply a spatial filter to the data to be transmitted to form a transmit beam transmitted by the antenna elements of the one or more antenna panels 580.

[0058] In some embodiments, the UE 505 and AN 510 may include beamforming circuitry disposed in corresponding transmit / receive circuitry, RF circuitry, or RFFE, which may be used to manage transmit / receive beamforming communications as described herein.

[0059] Beam management refers to a set of L1 / L2 processes that acquire and maintain a set of transmit / receive points (TRP or TRxP) and / or UE beams that can be used for DL ​​and UL transmission / reception. Beam management includes various operations or processes, such as beam determination, beam management, beam reporting, and beam scanning operations / processes. Beam determination refers to the ability of a TRxP or UE to select its own Tx / Rx beam. Beam measurement refers to the ability of a TRP or UE to measure the characteristics of a received beamforming signal. Beam reporting refers to the ability of a UE to report information about a beamforming signal based on beam measurements. Beam scanning refers to the operation of transmitting and / or receiving a beam covering a spatial area during a time interval in a predetermined manner.

[0060] The Tx / Rx beam correspondence at the TRxP holds if at least one of the following conditions is satisfied: The TRxP can determine the TRxP Rx beam for uplink reception based on the UE's downlink measurements on one or more Tx beams of the TRxP; and the TRxP can determine the TRxP Tx beam for downlink transmission based on the TRxP's uplink measurements on one or more Rx beams of the TRxP. The Tx / Rx beam correspondence at the UE holds if at least one of the following is satisfied: The UE can determine the UE Tx beam for uplink transmission based on the UE's downlink measurements on one or more Rx beams of the UE; the UE can determine the UE Rx beam for downlink reception based on the indication from the TRxP (based on the UE's uplink measurements on one or more Tx beams); and the ability indication for UE beam correspondence related information of the TRxP is supported.

[0061] In some specific embodiments, DL beam management includes process P-1, process P-2, and process P-3. Process P-1 is used to implement UE measurements on different TRxP Tx beams, thereby supporting the selection of the TRxP Tx beam / UE Rx beam. For beamforming at the TRxP, process P-1 generally includes intra-TRxP / inter-TRxP Tx beam scanning from different beam sets. For beamforming at the UE, process P-1 generally includes UE Rx beam scanning from different beam sets.

[0062] Process P-2 is used to implement UE measurements on different TRxP Tx beams, thereby possibly changing the inter-TRxP / intra-TRxP Tx beam. Process P-2 can be a special case of process P-1, where process P-2 is used for a potentially smaller set of beams for beam refinement than process P-1. Process P-3 is used to implement UE measurements on the same TRxP Tx beam when the UE uses beamforming, thereby changing the UE Rx beam. Processes P-1, P-2, and P-3 can be used for aperiodic beam reporting.

[0063] The UE measurements based on the RS (at least CSI-RS) for beam management are composed of K beams (where K is the total number of configured beams), and the UE reports the measurement results of N selected Tx beams (where N may or may not be a fixed number). The RS-based process for mobility purposes is not excluded. If N < K, the beam information to be reported includes the measurements of the N beams and the information indicating the N DL Tx beams. Other information or data may be included in or included together with the beam information. When the UE is configured with K'> 1 non-zero power (NZP) CSI-RS resources, the UE may report N' CSI-RS resource indicators (CRIs).

[0064] The UE may trigger a mechanism for recovering from a beam failure, which is referred to as "beam recovery", "beam failure recovery request procedure", etc. A beam failure event may occur when the quality of the beam pair link of the associated control channel drops below a threshold, when an associated timer times out, etc. When a beam failure occurs, the beam recovery mechanism is triggered. The network may explicitly configure resources for UL transmission of signals for the UE for recovery purposes. Configuration of resources is supported in the case where a base station (e.g., TRP, gNB, etc.) monitors from all or some directions (e.g., random access area). The UL transmission / resource for reporting a beam failure may be located in the same time instance as the physical random access channel (PRACH) or resources orthogonal to the PRACH resources, or at a time instance different from the PRACH (configurable for the UE). Transmission of DL signals is supported to allow the UE to monitor beams for identifying new potential beams.

[0065] For beam failure recovery, if one, multiple, or all serving PDCCH beams fail, a beam failure may be indicated. If a beam failure is indicated, a beam failure recovery request procedure is initiated. For example, when a beam failure is detected on a serving SSB / CSI-RS, the beam failure recovery request procedure may be used to indicate a serving gNB (or TRP) for a new SSB or CSI-RS. A beam failure may be detected by lower layers and indicated to the UE's media access control (MAC) entity.

[0066] Beam management also includes providing or not providing beam-related indications. When beam-related indications are provided, information related to the UE-side beamforming / reception process for CSI-RS-based measurements can be indicated to the UE via QCL. The same or different beams on the control channel and the corresponding data channel transmissions can be supported.

[0067] DL beam indication is based on the Transmission Configuration Indication (TCI) state. The TCI state is indicated in the TCI list configured by the Radio Resource Control (RRC) and / or Medium Access Control (MAC) Control Element (CE).

[0068] Figure 6 6 shows exemplary components of a baseband circuit 610 and a radio front end module (RFEM) 615 according to various embodiments. The baseband circuit 610 may correspond to Figure 5 Protocol processing circuits or digital baseband circuits as described in RFEM 615. Figure 5 As shown, the RFEM 615 may include at least a radio frequency (RF) circuit 606, a front end module (FEM) circuit 608, and an antenna array 611 coupled together as shown.

[0069] The baseband circuit 610 includes circuits and / or control logic components configured to execute various radio / network protocols and radio control functions that enable communication with one or more radio networks via the RF circuit 606. The radio control functions may include, but are not limited to, signal modulation / demodulation, encoding / decoding, radio frequency shifting, etc. In some embodiments, the modulation / demodulation circuit of the baseband circuit 610 may include a fast Fourier transform (FFT), precoding, or constellation mapping / demapping function. In some embodiments, the encoding / decoding circuit of the baseband circuit 610 may include convolution, tail-biting convolution, turbo, Viterbi, or low-density parity check (LDPC) encoder / decoder functions. The implementation of the modulation / demodulation and encoder / decoder functions is not limited to these examples, and may include other suitable functions in other embodiments. The baseband circuit 610 is configured to process the baseband signal received from the receiving signal path of the RF circuit 606 and generate a baseband signal for the transmitting signal path of the RF circuit 606. The baseband circuit 610 is configured to be connected to the application circuit to generate and process the baseband signal and control the operation of the RF circuit 606. Baseband circuitry 610 may handle various radio control functions.

[0070] The aforementioned circuits and / or control logic components of the baseband circuit 610 may include one or more single-core or multi-core processors. For example, the one or more processors may include a 3G baseband processor 604A, a 4G / LTE baseband processor 604B, a 5G / NR baseband processor 604C, or some other baseband processor 604D for other existing, developing, or future generations (e.g., the 6th generation (6G), etc.). In other embodiments, some or all of the functions of the baseband processors 604A-D may be included in a module stored in the memory 604G and executed via the central processing unit (CPU) 604E. In other embodiments, some or all of the functions of the baseband processors 604A-D may be provided as a hardware accelerator (e.g., FPGA, ASIC, etc.) loaded with an appropriate bitstream or logic block stored in a corresponding memory unit. In various embodiments, the memory 604G may store program code of a real-time OS (RTOS), which, when executed by the CPU 604E (or other baseband processor), is used to enable the CPU 604E (or other baseband processor) to manage resources, schedule tasks, etc. of the baseband circuit 610. In addition, the baseband circuit 610 includes one or more audio digital signal processors (DSPs) 604F. The audio DSP 604F includes elements for compression / decompression and echo cancellation, and may include other suitable processing elements in other embodiments.

[0071] In some embodiments, each of processors 604A-604E includes a corresponding memory interface to send data to / receive data from memory 604G. Baseband circuit 610 may also include one or more interfaces for communicatively coupling to other circuits / devices, such as an interface for sending data to / receiving data from a memory external to baseband circuit 610; an interface for sending data to / from a memory external to the baseband circuit; Figure 6 Application circuit interface for sending data to / receiving data from the application circuit XS105 / XS205; Figure 6 RF circuit 606 to send data / receive data from the RF circuit RF circuit interface; for receiving data from one or more wireless hardware elements (e.g., near field communication (NFC) components, Low power consumption components, components, etc.) to send data / receive data from these wireless hardware elements; and a power management interface for sending power or control signals to / receiving power or control signals from the PMIC XS225.

[0072] In an alternative embodiment (which can be combined with the above embodiment), the baseband circuit 610 includes one or more digital baseband systems, which are coupled to each other and to the CPU subsystem, the audio subsystem and the interface subsystem via an interconnection subsystem. The digital baseband subsystem can also be coupled to the digital baseband interface and the mixed signal baseband subsystem via another interconnection subsystem. Each of the interconnection subsystems may include a bus system, a point-to-point connector, a network on chip (NOC) structure and / or some other suitable bus or interconnection technology, such as those discussed herein. The audio subsystem may include a DSP circuit, a buffer memory, a program memory, a voice processing accelerator circuit, a data converter circuit such as an analog-to-digital converter circuit and a digital-to-analog converter circuit, an analog circuit including one or more of an amplifier and a filter, and / or other similar components. In one aspect of the present disclosure, the baseband circuit 610 may include a protocol processing circuit with one or more control circuit instances (not shown) to provide control functions for the digital baseband circuit and / or the radio frequency circuit (e.g., the radio front end module 615).

[0073] although Figure 6Not shown, but in some embodiments, the baseband circuit 610 includes various processing devices (e.g., a "multi-protocol baseband processor" or "protocol processing circuit") to operate one or more wireless communication protocols and various processing devices to implement PHY layer functions. In these embodiments, the PHY layer functions include the aforementioned radio control functions. In these embodiments, the protocol processing circuit operates or implements various protocol layers / entities of one or more wireless communication protocols. In a first example, when the baseband circuit 610 and / or the RF circuit 606 are part of a millimeter wave communication circuit or some other suitable cellular communication circuit, the protocol processing circuit may operate LTE protocol entities and / or 5G / NR protocol entities. In the first example, the protocol processing circuit will operate MAC, RLC, PDCP, SDAP, RRC, and NAS functions. In a second example, when the baseband circuit 610 and / or the RF circuit 606 are part of a Wi-Fi communication system, the protocol processing circuit may operate one or more IEEE-based protocols. In the second example, the protocol processing circuit will operate Wi-Fi MAC and logical link control (LLC) functions. The protocol processing circuitry may include one or more memory structures (e.g., 604G) for storing program code and data for operating protocol functions, and one or more processing cores for executing program code and performing various operations using data. The baseband circuitry 610 may also support radio communications for more than one wireless protocol.

[0074] The various hardware elements of the baseband circuit 610 discussed herein may be implemented as, for example, a solder-in substrate, which includes one or more integrated circuits (ICs), a single packaged integrated circuit soldered to a main circuit board, or a multi-chip module containing two or more ICs. In one example, the components of the baseband circuit 610 may be appropriately combined in a single chip or a single chipset, or may be arranged on the same circuit board. In another example, some or all of the components of the baseband circuit 610 and the RF circuit 606 may be implemented together, such as, for example, a system on a chip (SOC) or a system-level package (SiP). In another example, some or all of the components of the baseband circuit 610 may be implemented as a separate SoC coupled to the RF circuit 606 (or multiple instances of the RF circuit 606) in communication. In yet another example, some or all of the components of the baseband circuit 610 and the application circuit XS105 / XS205 may be implemented together as a separate SoC (e.g., a "multi-chip package") mounted to the same circuit board.

[0075] In some embodiments, baseband circuit 610 may provide communications compatible with one or more radio technologies. For example, in some embodiments, baseband circuit 610 may support communications with E-UTRAN or other WMAN, WLAN, WPAN. Embodiments in which baseband circuit 610 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuits.

[0076] RF circuit 606 can communicate with a wireless network through a non-solid medium using modulated electromagnetic radiation. In various embodiments, RF circuit 606 may include switches, filters, amplifiers, etc. to facilitate communication with a wireless network. RF circuit 606 may include a receive signal path, which may include circuits for down-converting RF signals received from FEM circuit 608 and providing baseband signals to baseband circuit 610. RF circuit 606 may also include a transmit signal path, which may include circuits for up-converting baseband signals provided by baseband circuit 610 and providing RF output signals for transmission to FEM circuit 608.

[0077] In some embodiments, the receive signal path of the RF circuit 606 may include a mixer circuit 606a, an amplifier circuit 606b, and a filter circuit 606c. In some embodiments, the transmit signal path of the RF circuit 606 may include a filter circuit 606c and a mixer circuit 606a. The RF circuit 606 may also include a synthesizer circuit 606d for synthesizing the frequency used by the mixer circuit 606a for the receive signal path and the transmit signal path. In some embodiments, the mixer circuit 606a of the receive signal path may be configured to down-convert the RF signal received from the FEM circuit 608 based on the synthesized frequency provided by the synthesizer circuit 606d. The amplifier circuit 606b may be configured to amplify the down-converted signal, and the filter circuit 606c may be a low pass filter (LPF) or a band pass filter (BPF) configured to remove unwanted signals from the down-converted signal to generate an output baseband signal. The output baseband signal may be provided to the baseband circuit 610 for further processing. In some embodiments, the output baseband signal may be a zero frequency baseband signal, although this is not required.In some embodiments, the mixer circuit 606a of the receive signal path may include a passive mixer, although the scope of the embodiments is not limited in this respect.

[0078] In some embodiments, mixer circuit 606a of the transmit signal path may be configured to upconvert an input baseband signal based on a synthesized frequency provided by synthesizer circuit 606d to generate an RF output signal for FEM circuit 608. The baseband signal may be provided by baseband circuit 610 and may be filtered by filter circuit 606c.

[0079] In some embodiments, the mixer circuit 606a of the receive signal path and the mixer circuit 606a of the transmit signal path may include two or more mixers and may be arranged for orthogonal down-conversion and up-conversion, respectively. In some embodiments, the mixer circuit 606a of the receive signal path and the mixer circuit 606a of the transmit signal path may include two or more mixers and may be arranged for image suppression (e.g., Hartley image suppression). In some embodiments, the mixer circuit 606a of the receive signal path and the mixer circuit 606a of the transmit signal path may be arranged for direct down-conversion and direct up-conversion, respectively. In some embodiments, the mixer circuit 606a of the receive signal path and the mixer circuit 606a of the transmit signal path may be configured for superheterodyne operation.

[0080] In some embodiments, the output baseband signal and the input baseband signal may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternative embodiments, the output baseband signal and the input baseband signal may be digital baseband signals. In these alternative embodiments, the RF circuit 606 may include an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC) circuit, and the baseband circuit 610 may include a digital baseband interface to communicate with the RF circuit 606.

[0081] In some dual-mode embodiments, separate radio IC circuits may be provided to process signals for each spectrum, although the scope of the embodiments is not limited in this respect.

[0082] In some embodiments, synthesizer circuit 606d may be a fractional-N synthesizer or a fractional N / N+1 synthesizer, but the scope of the embodiments is not limited in this respect, as other types of frequency synthesizers may also be suitable. For example, synthesizer circuit 606d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer including a phase-locked loop with a frequency divider.

[0083] Synthesizer circuit 606d may be configured to synthesize an output frequency based on the frequency input and the divider control input for use by mixer circuit 606a of RF circuit 606. In some embodiments, synthesizer circuit 606d may be a fractional-N / N+1 synthesizer.

[0084] In some embodiments, the frequency input may be provided by a voltage controlled oscillator (VCO), although this is not required. The divider control input may be provided by the baseband circuit 610 or the application circuit XS105 / XS205 according to the desired output frequency. In some embodiments, the divider control input (e.g., N) may be determined from a lookup table based on the channel indicated by the application circuit XS105 / XS205.

[0085] The synthesizer circuit 606d of the RF circuit 606 may include a frequency divider, a delay locked loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider may be a dual-mode frequency divider (DMD), and the phase accumulator may be a digital phase accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by N or N+1 (e.g., based on a carry) to provide a fractional division ratio. In some example embodiments, the DLL may include a cascaded, tunable, delay element, a phase detector, a charge pump, and a D-type flip-flop set. In these embodiments, the delay element may be configured to divide the VCO cycle into Nd equal phase groups, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

[0086] In some embodiments, the synthesizer circuit 606d can be configured to generate a carrier frequency as an output frequency, while in other embodiments, the output frequency can be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used with a quadrature generator and divider circuit to generate multiple signals with multiple different phases relative to each other at the carrier frequency. In some embodiments, the output frequency can be the LO frequency (fLO). In some embodiments, the RF circuit 606 can include an IQ / polarity converter.

[0087] FEM circuitry 608 may include a receive signal path that may include circuitry configured to operate on RF signals received from antenna array 611, amplify the received signals, and provide an amplified version of the received signals to RF circuitry 606 for further processing. FEM circuitry 608 may also include a transmit signal path that may include circuitry configured to amplify transmit signals provided by RF circuitry 606 for transmission by one or more antenna elements in antenna array 611. In various embodiments, amplification by either the transmit signal path or the receive signal path may be accomplished only in RF circuitry 606, only in FEM circuitry 608, or in both RF circuitry 606 and FEM circuitry 608.

[0088] In some embodiments, the FEM circuit 608 may include a TX / RX switch to switch between transmit mode and receive mode operation. The FEM circuit 608 may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuit 608 may include an LNA to amplify the received RF signal and provide the amplified received RF signal as an output (e.g., to the RF circuit 606). The transmit signal path of the FEM circuit 608 may include a power amplifier (PA) for amplifying the input RF signal (e.g., provided by the RF circuit 606), and one or more filters for generating an RF signal for subsequent transmission by one or more antenna elements of the antenna array 620.

[0089] The antenna array 620 includes one or more antenna elements, each of which is configured to convert an electrical signal into a radio wave to travel through the air and convert the received radio wave into an electrical signal. For example, the digital baseband signal provided by the baseband circuit 610 is converted into an analog RF signal (e.g., a modulated waveform), which is amplified and transmitted via the antenna elements of the antenna array 620 including one or more antenna elements (not shown). The antenna elements may be omnidirectional, directional, or a combination thereof. The antenna elements may be formed into a variety of arrangements as known and / or discussed herein. The antenna array 620 may include a microstrip antenna or a printed antenna manufactured on the surface of one or more printed circuit boards. The antenna array 620 may be formed into a patch of metal foil (e.g., a patch antenna) of various shapes, and may be coupled to the RF circuit 606 and / or the FEM circuit XT108 using a metal transmission line or the like.

[0090] Figure 7 is a block diagram illustrating components capable of reading instructions from a machine-readable medium or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and performing any one or more of the methods discussed herein, according to some exemplary embodiments. Specifically, Figure 7A schematic diagram of hardware resources 700 is shown, including one or more processors (or processor cores) 710, one or more memory / storage devices 720, and one or more communication resources 730, each of which may be communicatively coupled via a bus 740. As used herein, the terms "computing resources," "hardware resources," and the like may refer to physical or virtual devices, physical or virtual components within a computing environment, and / or physical or virtual components within a particular device, such as computer equipment, mechanical equipment, memory space, processor / CPU time and / or processor / CPU usage, processor and accelerator load, hardware time or usage, power, input / output operations, ports or network sockets, channel / link allocation, throughput, memory usage, storage, network, database, and applications, etc. For embodiments in which node virtualization (e.g., NFV) is utilized, a hypervisor 702 may be executed to provide an execution environment in which one or more network slices / subslices utilize hardware resources 700. "Virtualized resources" may refer to computing, storage, and / or network resources provided by a virtualization infrastructure to applications, devices, systems, and the like.

[0091] Processor 710 (e.g., a central processing unit (CPU), a reduced instruction set computing (RISC) processor, a complex instruction set computing (CISC) processor, a graphics processing unit (GPU), a digital signal processor (DSP) (such as a baseband processor), an application specific integrated circuit (ASIC), a radio frequency integrated circuit (RFIC), another processor, or any suitable combination thereof) may include, for example, processor 712 and processor 714.

[0092] The memory / storage device 720 may include main memory, disk storage, or any suitable combination thereof. The memory / storage device 720 may include, but is not limited to, any type of volatile or non-volatile memory, such as dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state storage, etc.

[0093] The communication resources 730 may include an interconnect or network interface component or other suitable device to communicate with one or more peripheral devices 704 or one or more databases 706 via the network 708. For example, the communication resources 730 may include a wired communication component (e.g., for coupling via a universal serial bus (USB)), a cellular communication component, an NFC component, Components (e.g. Low power consumption), components and other communication components. As used herein, the term "network resource" or "communication resource" may refer to a computing resource that can be accessed by a computer device via a communication network. The term "system resource" may refer to any kind of shared entity that provides a service, and may include computing resources and / or network resources. System resources may be considered a set of coherent functions, network data objects, or services accessible through a server, where such system resources reside on a single host or multiple hosts and are clearly identifiable.

[0094] The instructions 750 may include software, programs, applications, applet, applications, or other executable code for causing at least any one of the processors 710 to perform any one or more of the methodologies discussed herein. The instructions 750 may reside in whole or in part in at least one of the processors 710 (e.g., in a cache memory of the processor), the memory / storage device 720, or any suitable combination thereof. In addition, any portion of the instructions 750 may be transmitted to the hardware resources 700 from any combination of the peripheral device 704 or the database 706. Thus, the memory of the processor 710, the memory / storage device 720, the peripheral device 704, and the database 706 are examples of computer-readable and machine-readable media.

[0095] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes and / or methods described in the following example section. For example, the baseband circuit described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the following embodiments. For another example, the circuits associated with the UE, base station, network element, etc. described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the embodiments shown in the example section below.

[0096] Example

[0097] Example 1 includes a method for operating a UE, the method comprising: determining whether to configure the same spatial relationship information for each SRS resource in a group of sounding reference signal (SRS) resources; selecting a spatial transmit filter based on the determination of whether to configure the same spatial relationship information for each SRS resource in the group of SRS resources; and transmitting an uplink transmission using the spatial transmit filter.

[0098] Example 2 includes a method according to Example 1 or some other example herein, wherein if it is determined that the same spatial relationship information is configured for each SRS resource in the set of SRS resources, the spatial transmit filter is used for a first SRS resource and is associated with a spatial domain filter for the spatial relationship information of the first SRS resource.

[0099] Example 3 includes a method according to Example 1 or some other example herein, wherein if it is determined that the same spatial relationship information is not configured for each SRS resource in the set of SRS resources, the spatial transmit filter is used for a first SRS resource and is indicated by the spatial relationship information used for the first SRS resource.

[0100] Example 4 includes a method according to Example 1 or some other example herein, further comprising providing an indication to a radio access node that the UE supports partial beam correspondence.

[0101] Example 5 includes a method according to Example 4 or some other example herein, wherein the indication is in a UE capability message.

[0102] Example 6 includes a method according to Example 1 or some other example herein, further comprising: determining to configure the same spatial relationship information for a subset of SRS resources in the set of SRS resources, wherein the spatial transmit filter is used for the subset of SRS resources and is associated with a spatial domain filter indicated by the same spatial relationship information configured for the subset of SRS resources.

[0103] Example 7 includes a method according to Example 6 or some other example herein, further comprising: determining that a first SRS resource in the set of SRS resources is configured with first spatial relationship information, wherein the first spatial relationship information is different from the same spatial relationship information configured for the subset of SRS resources; and selecting a first spatial transmit filter indicated by the first spatial relationship information for transmission of the first SRS resource.

[0104] Example 8 includes a method according to Example 6 or some other example herein, further comprising: determining that a first SRS resource in the set of SRS resources is configured with first spatial relationship information, wherein the first spatial relationship information is different from the same spatial relationship information configured for the subset of SRS resources; and selecting a first spatial transmit filter associated with the spatial domain filter indicated by the first spatial relationship information for transmission of the first SRS resource.

[0105] Example 9 includes a method comprising: receiving spatial relationship information for each SRS resource in a group of sounding reference signal (SRS) resources; determining a first beam configured for a first SRS resource based on the spatial relationship information; and selecting the first beam or a second beam related to the first beam for transmission of the first SRS resource based on whether at least multiple SRS resources in the group of SRS resources are configured with a common beam.

[0106] Example 10 includes the method of Example 9 or some other example herein, further comprising transmitting the first SRS resource using the first beam.

[0107] Example 11 includes the method according to Example 9 or some other example in the present document, further including: determining that all the SRS resources in the group of SRS resources are configured with the common beam based on the spatial relationship information; and selecting the second beam for transmission of the first SRS resource based on the determination that all the SRS resources in the group of SRS resources are configured with the common beam.

[0108] Example 12 includes the method described in Example 9 or some other example herein, further comprising: determining that all the SRS resources in the set of SRS resources are configured with different beams based on the spatial relationship information; and selecting the first beam for transmission of the first SRS resource based on the determination that all the SRS resources in the set of SRS resources are configured with different beams.

[0109] Example 13 includes a method according to Example 9 or some other example herein, further comprising: determining that a subset of SRS resources in the set of SRS resources is configured with the common beam, wherein the subset does not include the first SRS resource, and the first beam is different from the common beam; and selecting the first beam for transmission of the first SRS resource based on the subset not including the first SRS resource.

[0110] Example 14 includes a method according to Example 9 or some other example herein, further comprising: determining that the subset of SRS resources in the set of SRS resources is configured with the common beam, wherein the subset includes the first SRS resource and the first beam is the common beam; and selecting a first beam for transmission of the first SRS resource based on the subset including the first SRS resource.

[0111] Example 15 includes a method according to any one of Examples 9 to 14 or some other example herein, further comprising providing an indication to a radio access node that a user equipment (UE) supports partial beam correspondence.

[0112] Example 16 includes a method according to Example 15 or some other example herein, wherein the indication is in a UE capability message.

[0113] Example 17 includes a method of operating a UE, the method comprising: determining a value K; sequentially transmitting a sounding reference signal (SRS) resource using multiple spatial domain filters; receiving control signaling from an access node, the control signaling being used to include a transmission configuration indication (TCI) having an indication of the status of the SRS resource; selecting a spatial domain filter from the multiple spatial domain filters, the spatial domain filter being used to transmit the latest transmission of the SRS resource at least K time slots or symbols before receiving the downlink signal; and using the spatial domain filter or a filter related to the spatial domain filter to receive communications from the access node.

[0114] Example 18 includes a method according to Example 17 or some other example herein, further comprising receiving the TCI for receiving a downlink signal, wherein the downlink signal is a physical downlink control channel, a physical downlink shared channel, or a channel state information-reference signal.

[0115] Example 19 includes a method according to Example 17 or some other example herein, wherein K is based on the capabilities of the UE.

[0116] Example 20 includes a method according to Example 18 or some other example herein, further comprising: determining a type or configuration of the downlink signal; and using the spatial domain filter or the filter related to the spatial domain filter based on the type or configuration of the downlink signal.

[0117] Example 21 may include an apparatus comprising means for performing one or more elements of a method described in or related to any of Examples 1-20, or any other method or process described herein.

[0118] Example 22 may include one or more non-transitory computer-readable media that include instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of a method described or related to any of Examples 1-20 or any other method or process described herein.

[0119] Example 23 may include an apparatus comprising logic components, modules, or circuits for performing one or more elements of the method described in or related to any of Examples 1 to 20, or any other method or process described herein.

[0120] Example 24 may include a method, technique, or process as described or related to any of Examples 1-20, or a portion or component thereof.

[0121] Example 25 may include a device comprising: one or more processors and one or more computer-readable media, the one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform a method, technique, or process, or portion thereof, as described or related to any one of Examples 1 to 20.

[0122] Example 26 may include a signal as described or related to any of Examples 1 to 20, or a portion or component thereof.

[0123] Example 27 may include signals in a wireless network as shown and described herein.

[0124] Example 28 may include a method of communicating in a wireless network as shown and described herein.

[0125] Example 29 may include a system for providing wireless communications as shown and described herein.

[0126] Example 30 may include an apparatus for providing wireless communications as shown and described herein.

[0127] Unless explicitly stated otherwise, any of the above examples may be combined with any other example (or combination of examples). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the above teachings, modifications and variations are possible or can be obtained from the practice of various embodiments.

Claims

1. One or more computer-readable media having instructions which, when executed by one or more processors, cause a user equipment (UE) to perform the following operations: Determining whether to configure the same spatial relationship information for each SRS resource in a group of sounding reference signal SRS resources; selecting a spatial transmission filter based on the determining whether the same spatial relationship information is configured for each SRS resource in the set of SRS resources; and causing uplink transmissions to be transmitted using the spatial transmit filter, When the instructions are executed, the UE further causes the UE to provide an indication to a radio access node that the UE supports partial beam correspondence.

2. One or more computer-readable media according to claim 1, wherein if it is determined that the same spatial relationship information is configured for each SRS resource in the set of SRS resources, the spatial transmit filter is used for a first SRS resource and is associated with a spatial domain filter for the spatial relationship information of the first SRS resource.

3. One or more computer-readable media according to claim 1, wherein if it is determined that the same spatial relationship information is not configured for each SRS resource in the set of SRS resources, the spatial transmit filter is used for a first SRS resource and is indicated by the spatial relationship information used for the first SRS resource.

4. The one or more computer-readable media of claim 1, wherein the indication is in a UE capabilities message.

5. The one or more computer-readable media of claim 1, wherein the instructions, when executed, further cause the UE to: Determine to configure the same spatial relationship information for a subset of SRS resources in the group of SRS resources, The spatial transmission filter is used for the SRS resource subset and is associated with a spatial domain filter indicated by the same spatial relationship information configured for the SRS resource subset.

6. The one or more computer-readable media of claim 5, wherein the instructions, when executed, further cause the UE to: determining that a first SRS resource in the set of SRS resources is configured with first spatial relationship information, the first spatial relationship information being different from the same spatial relationship information configured for the SRS resource subset; and A first spatial transmit filter indicated by the first spatial relationship information is selected for transmission of the first SRS resource.

7. The one or more computer-readable media of claim 5, wherein the instructions, when executed, further cause the UE to: determining that a first SRS resource in the set of SRS resources is configured with first spatial relationship information, the first spatial relationship information being different from the same spatial relationship information configured for the SRS resource subset; and A first spatial transmit filter associated with the spatial domain filter indicated by the first spatial relationship information is selected for transmission of the first SRS resource.

8. An apparatus for beam management, the apparatus comprising: beam forming circuit; and a processing circuit coupled to the beamforming circuit to: Receiving spatial relationship information for each SRS resource in a set of sounding reference signal SRS resources; determining, based on the spatial relationship information, a first beam configured for a first SRS resource; as well as selecting the first beam or a second beam related to the first beam for transmission of the first SRS resource based on whether at least a plurality of SRS resources in the group of SRS resources are configured with a common beam, The processing circuit is further configured to provide an indication to the radio access node that the user equipment UE supports partial beam correspondence.

9. The apparatus of claim 8, wherein the processing circuit is further configured to control the beamforming circuit to transmit the first SRS resource using the first beam.

10. The apparatus of claim 8, wherein the processing circuit is further configured to: Determining, based on the spatial relationship information, that all SRS resources in the group of SRS resources are configured with the common beam; and The second beam is selected for transmission of the first SRS resource based on the determination that all SRS resources in the set of SRS resources are configured with the common beam.

11. The apparatus of claim 8, wherein the processing circuit is further configured to: Determining, based on the spatial relationship information, that all SRS resources in the group of SRS resources are configured with different beams; and The first beam is selected for transmission of the first SRS resource based on the determination that all SRS resources in the set of SRS resources are configured with different beams.

12. The apparatus of claim 8, wherein the processing circuit is further configured to: determining that a subset of SRS resources in the set of SRS resources is configured with the common beam, wherein the subset does not include the first SRS resource and the first beam is different from the common beam; and The first beam is selected for transmission of the first SRS resource based on the subset not including the first SRS resource.

13. The apparatus of claim 8, wherein the processing circuit is further configured to: determining that a subset of SRS resources in the set of SRS resources is configured with the common beam, wherein the subset includes the first SRS resource and the first beam is the common beam; and A first beam is selected for transmission of the first SRS resource based on the subset including the first SRS resource.

14. The apparatus of claim 8, wherein the indication is in a UE capability message.

15. One or more computer-readable media having instructions which, when executed by one or more processors, cause a user equipment (UE) to perform the following operations: Determine the value K; Using a plurality of spatial domain filters to sequentially transmit sounding reference signal SRS resources; receiving control signaling from an access node, the control signaling being used to include a transmission configuration indication TCI indicating a state of the SRS resource; selecting a spatial domain filter from the plurality of spatial domain filters, the spatial domain filter being used to transmit a most recent transmission of the SRS resource at least K time slots or symbols prior to receiving a downlink signal; and Communications are received from the access node using the spatial domain filter or a filter related to the spatial domain filter.

16. The one or more computer-readable media of claim 15, wherein the instructions, when executed, further cause the UE to: The TCI is received for reception of a downlink signal, the downlink signal being a physical downlink control channel, a physical downlink shared channel, or a channel state information-reference signal.

17. The one or more computer-readable media of claim 15, wherein K is based on capabilities of the UE.

18. The one or more computer-readable media of claim 15, wherein the instructions, when executed, further cause the UE to: determining a type or configuration of the downlink signal; and The spatial domain filter or the filter related to the spatial domain filter is used based on the type or configuration of the downlink signal.

19. The one or more computer-readable media of claim 15, wherein the control signaling is downlink control information, radio resource control signaling, or medium access control-control element.

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