WO2023205986A1 - Indicateur unifié de configuration de transmission pour un ensemble de signaux de référence de sondage - Google Patents

Indicateur unifié de configuration de transmission pour un ensemble de signaux de référence de sondage Download PDF

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Publication number
WO2023205986A1
WO2023205986A1 PCT/CN2022/088897 CN2022088897W WO2023205986A1 WO 2023205986 A1 WO2023205986 A1 WO 2023205986A1 CN 2022088897 W CN2022088897 W CN 2022088897W WO 2023205986 A1 WO2023205986 A1 WO 2023205986A1
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WIPO (PCT)
Prior art keywords
srs
reference signal
unified
resource set
csi
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PCT/CN2022/088897
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English (en)
Inventor
Fang Yuan
Yan Zhou
Tao Luo
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Qualcomm Incorporated
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Publication date
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Priority to PCT/CN2022/088897 priority Critical patent/WO2023205986A1/fr
Publication of WO2023205986A1 publication Critical patent/WO2023205986A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for sounding reference signal (SRS) transmissions based on unified TCI configurations for non-codebook SRS sets.
  • SRS sounding reference signal
  • Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users
  • wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others.
  • One aspect provides a method of wireless communications by a user equipment (UE) .
  • the method includes obtaining signaling configuring the UE with: 1) a sounding reference signal (SRS) resource set associated with a downlink reference signal, and 2) one or more unified Transmission Configuration Indicator (TCI) states; measuring the associated downlink reference signal; calculating a precoder based on the measurement; and outputting for transmission an SRS on one or more SRS resources of the SRS resource set, using the precoder and 1) a first beam indicated via the associated downlink reference signal, or 2) a second beam indicated via one of the one or more unified TCI states.
  • SRS sounding reference signal
  • TCI Transmission Configuration Indicator
  • an apparatus operable, configured, or otherwise adapted to perform any one or more of the aforementioned methods and/or those described elsewhere herein; a non-transitory, computer-readable media comprising instructions that, when executed by a processor of an apparatus, cause the apparatus to perform the aforementioned methods as well as those described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising code for performing the aforementioned methods as well as those described elsewhere herein; and/or an apparatus comprising means for performing the aforementioned methods as well as those described elsewhere herein.
  • an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks.
  • FIG. 1 depicts an example wireless communications network.
  • FIG. 2 depicts an example disaggregated base station architecture.
  • FIG. 3 depicts aspects of an example base station and an example user equipment.
  • FIGS. 4A, 4B, 4C, and 4D depict various example aspects of data structures for a wireless communications network.
  • FIG. 5 is a call flow diagram illustrating an example of codebook based UL transmission, in accordance with certain aspects of the present disclosure.
  • FIG. 6 is a call flow diagram illustrating an example of non-codebook based UL transmission, in accordance with certain aspects of the present disclosure.
  • FIG. 7 depicts a call flow diagram for SRS transmissions, in accordance with certain aspects of the present disclosure.
  • FIG. 8 depicts a method for wireless communications.
  • FIG. 9 depicts aspects of an example communications device.
  • aspects of the present disclosure provide apparatuses, methods, processing systems, and computer-readable mediums for transmitting SRS based on unified TCI configurations for non-codebook SRS sets.
  • a UE is typically configured to transmit SRS on an SRS resource, selected from an SRS resource set.
  • a UE is typically configured with multiple SRS resource sets, each having one or more SRS resources.
  • the SRS may be transmitted as a non-codebook multiple-input multiple-output (MIMO) transmission, using a beam that may be indicated in various manners.
  • MIMO non-codebook multiple-input multiple-output
  • the beam may be for an SRS resource set configured for non-codebook MIMO may be indicated by an associated channel state information reference signal (CSI-RS) .
  • CSI-RS channel state information reference signal
  • the associated CSI-RS may be indicated as part of an SRS resource set configuration signaled to the UE.
  • the same SRS resource set may also have another beam indicated.
  • another beam may be indicated by a unified transmission configuration indicator (TCI) signaled to the UE.
  • TCI transmission configuration indicator
  • aspects of the present disclosure provide techniques that may help resolve the potential conflict between such multiple beam indications.
  • the techniques may provide what may be considered deterministic rules that a UE can apply to select one of the multiple indicated beams.
  • the techniques may help a UE select an optimal beam, which may help improve performance.
  • FIG. 1 depicts an example of a wireless communications network 100, in which aspects described herein may be implemented.
  • wireless communications network 100 includes various network entities (alternatively, network elements or network nodes) .
  • a network entity is generally a communications device and/or a communications function performed by a communications device (e.g., a user equipment (UE) , a base station (BS) , a component of a BS, a server, etc. ) .
  • a communications device e.g., a user equipment (UE) , a base station (BS) , a component of a BS, a server, etc.
  • UE user equipment
  • BS base station
  • a component of a BS a component of a BS
  • server a server
  • wireless communications network 100 includes terrestrial aspects, such as ground-based network entities (e.g., BSs 102) , and non-terrestrial aspects, such as satellite 140 and aircraft 145, which may include network entities on-board (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and user equipments.
  • terrestrial aspects such as ground-based network entities (e.g., BSs 102)
  • non-terrestrial aspects such as satellite 140 and aircraft 145
  • network entities on-board e.g., one or more BSs
  • other network elements e.g., terrestrial BSs
  • wireless communications network 100 includes BSs 102, UEs 104, and one or more core networks, such as an Evolved Packet Core (EPC) 160 and 5G Core (5GC) network 190, which interoperate to provide communications services over various communications links, including wired and wireless links.
  • EPC Evolved Packet Core
  • 5GC 5G Core
  • FIG. 1 depicts various example UEs 104, which may more generally include: a cellular phone, smart phone, session initiation protocol (SIP) phone, laptop, personal digital assistant (PDA) , satellite radio, global positioning system, multimedia device, video device, digital audio player, camera, game console, tablet, smart device, wearable device, vehicle, electric meter, gas pump, large or small kitchen appliance, healthcare device, implant, sensor/actuator, display, internet of things (IoT) devices, always on (AON) devices, edge processing devices, or other similar devices.
  • IoT internet of things
  • AON always on
  • edge processing devices or other similar devices.
  • UEs 104 may also be referred to more generally as a mobile device, a wireless device, a wireless communications device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.
  • the BSs 102 wirelessly communicate with (e.g., transmit signals to or receive signals from) UEs 104 via communications links 120.
  • the communications links 120 between BSs 102 and UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a BS 102 and/or downlink (DL) (also referred to as forward link) transmissions from a BS 102 to a UE 104.
  • UL uplink
  • DL downlink
  • the communications links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity in various aspects.
  • MIMO multiple-input and multiple-output
  • BSs 102 may generally include: a NodeB, enhanced NodeB (eNB) , next generation enhanced NodeB (ng-eNB) , next generation NodeB (gNB or gNodeB) , access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission reception point, and/or others.
  • Each of BSs 102 may provide communications coverage for a respective geographic coverage area 110, which may sometimes be referred to as a cell, and which may overlap in some cases (e.g., small cell 102’ may have a coverage area 110’ that overlaps the coverage area 110 of a macro cell) .
  • a BS may, for example, provide communications coverage for a macro cell (covering relatively large geographic area) , a pico cell (covering relatively smaller geographic area, such as a sports stadium) , a femto cell (relatively smaller geographic area (e.g., a home) ) , and/or other types of cells.
  • BSs 102 are depicted in various aspects as unitary communications devices, BSs 102 may be implemented in various configurations.
  • one or more components of a base station may be disaggregated, including a central unit (CU) , one or more distributed units (DUs) , one or more radio units (RUs) , a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, to name a few examples.
  • CU central unit
  • DUs distributed units
  • RUs radio units
  • RIC Near-Real Time
  • Non-RT Non-Real Time
  • a base station may be virtualized.
  • a base station e.g., BS 102
  • BS 102 may include components that are located at a single physical location or components located at various physical locations.
  • a base station includes components that are located at various physical locations
  • the various components may each perform functions such that, collectively, the various components achieve functionality that is similar to a base station that is located at a single physical location.
  • a base station including components that are located at various physical locations may be referred to as a disaggregated radio access network architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture.
  • FIG. 2 depicts and describes an example disaggregated base station architecture.
  • Different BSs 102 within wireless communications network 100 may also be configured to support different radio access technologies, such as 3G, 4G, and/or 5G.
  • BSs 102 configured for 4G LTE may interface with the EPC 160 through first backhaul links 132 (e.g., an S1 interface) .
  • BSs 102 configured for 5G e.g., 5G NR or Next Generation RAN (NG-RAN)
  • 5G e.g., 5G NR or Next Generation RAN (NG-RAN)
  • BSs 102 may communicate directly or indirectly (e.g., through the EPC 160 or 5GC 190) with each other over third backhaul links 134 (e.g., X2 interface) , which may be wired or wireless.
  • third backhaul links 134 e.g., X2 interface
  • Wireless communications network 100 may subdivide the electromagnetic spectrum into various classes, bands, channels, or other features. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband.
  • frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband.
  • 3GPP currently defines Frequency Range 1 (FR1) as including 410 MHz –7125 MHz, which is often referred to (interchangeably) as “Sub-6 GHz” .
  • FR2 Frequency Range 2
  • mmW millimeter wave
  • a base station configured to communicate using mmWave/near mmWave radio frequency bands may utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.
  • beamforming e.g., 182
  • UE e.g., 104
  • the communications links 120 between BSs 102 and, for example, UEs 104 may be through one or more carriers, which may have different bandwidths (e.g., 5, 10, 15, 20, 100, 400, and/or other MHz) , and which may be aggregated in various aspects. Carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) .
  • BS 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.
  • BS 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182’.
  • UE 104 may receive the beamformed signal from the BS 180 in one or more receive directions 182”.
  • UE 104 may also transmit a beamformed signal to the BS 180 in one or more transmit directions 182”.
  • BS 180 may also receive the beamformed signal from UE 104 in one or more receive directions 182’. BS 180 and UE 104 may then perform beam training to determine the best receive and transmit directions for each of BS 180 and UE 104. Notably, the transmit and receive directions for BS 180 may or may not be the same. Similarly, the transmit and receive directions for UE 104 may or may not be the same.
  • Wireless communications network 100 further includes a Wi-Fi AP 150 in communication with Wi-Fi stations (STAs) 152 via communications links 154 in, for example, a 2.4 GHz and/or 5 GHz unlicensed frequency spectrum.
  • STAs Wi-Fi stations
  • D2D communications link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and/or a physical sidelink feedback channel (PSFCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and/or a physical sidelink feedback channel (PSFCH) .
  • PSBCH physical sidelink broadcast channel
  • PSDCH physical sidelink discovery channel
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • FCH physical sidelink feedback channel
  • EPC 160 may include various functional components, including: a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and/or a Packet Data Network (PDN) Gateway 172, such as in the depicted example.
  • MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • MME 162 provides bearer and connection management.
  • IP Internet protocol
  • Serving Gateway 166 which itself is connected to PDN Gateway 172.
  • PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • PDN Gateway 172 and the BM-SC 170 are connected to IP Services 176, which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switched (PS) streaming service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • PS Packet Switched
  • BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and/or may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • MBMS Gateway 168 may be used to distribute MBMS traffic to the BSs 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and/or may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • 5GC 190 may include various functional components, including: an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • AMF 192 may be in communication with Unified Data Management (UDM) 196.
  • UDM Unified Data Management
  • AMF 192 is a control node that processes signaling between UEs 104 and 5GC 190.
  • AMF 192 provides, for example, quality of service (QoS) flow and session management.
  • QoS quality of service
  • IP Internet protocol
  • UPF 195 which is connected to the IP Services 197, and which provides UE IP address allocation as well as other functions for 5GC 190.
  • IP Services 197 may include, for example, the Internet, an intranet, an IMS, a PS streaming service, and/or other IP services.
  • a network entity or network node can be implemented as an aggregated base station, as a disaggregated base station, a component of a base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.
  • IAB integrated access and backhaul
  • FIG. 2 depicts an example disaggregated base station 200 architecture.
  • the disaggregated base station 200 architecture may include one or more central units (CUs) 210 that can communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a Non-Real Time (Non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) Framework 205, or both) .
  • a CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an F1 interface.
  • DUs distributed units
  • the DUs 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links.
  • the RUs 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links.
  • RF radio frequency
  • the UE 104 may be simultaneously served by multiple RUs 240.
  • Each of the units may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium.
  • Each of the units, or an associated processor or controller providing instructions to the communications interfaces of the units can be configured to communicate with one or more of the other units via the transmission medium.
  • the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units.
  • the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • a wireless interface which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • RF radio frequency
  • the CU 210 may host one or more higher layer control functions.
  • control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 210.
  • the CU 210 may be configured to handle user plane functionality (e.g., Central Unit –User Plane (CU-UP) ) , control plane functionality (e.g., Central Unit –Control Plane (CU-CP) ) , or a combination thereof.
  • the CU 210 can be logically split into one or more CU-UP units and one or more CU-CP units.
  • the CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration.
  • the CU 210 can be implemented to communicate with the DU 230, as necessary, for network control and signaling.
  • the DU 230 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 240.
  • the DU 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3 rd Generation Partnership Project (3GPP) .
  • the DU 230 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 230, or with the control functions hosted by the CU 210.
  • Lower-layer functionality can be implemented by one or more RUs 240.
  • an RU 240 controlled by a DU 230, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split.
  • the RU (s) 240 can be implemented to handle over the air (OTA) communications with one or more UEs 104.
  • OTA over the air
  • real-time and non-real-time aspects of control and user plane communications with the RU (s) 240 can be controlled by the corresponding DU 230.
  • this configuration can enable the DU (s) 230 and the CU 210 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
  • the SMO Framework 205 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface) .
  • the SMO Framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) .
  • a cloud computing platform such as an open cloud (O-Cloud) 290
  • network element life cycle management such as to instantiate virtualized network elements
  • a cloud computing platform interface such as an O2 interface
  • Such virtualized network elements can include, but are not limited to, CUs 210, DUs 230, RUs 240 and Near-RT RICs 225.
  • the SMO Framework 205 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 211, via an O1 interface. Additionally, in some implementations, the SMO Framework 205 can communicate directly with one or more RUs 240 via an O1 interface.
  • the SMO Framework 205 also may include a Non-RT RIC 215 configured to support functionality of the SMO Framework 205.
  • the Non-RT RIC 215 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 225.
  • the Non-RT RIC 215 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 225.
  • the Near-RT RIC 225 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 210, one or more DUs 230, or both, as well as an O-eNB, with the Near-RT RIC 225.
  • the Non-RT RIC 215 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 225 and may be received at the SMO Framework 205 or the Non-RT RIC 215 from non-network data sources or from network functions. In some examples, the Non-RT RIC 215 or the Near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 215 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 205 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
  • SMO Framework 205 such as reconfiguration via O1
  • A1 policies such as A1 policies
  • FIG. 3 depicts aspects of an example BS 102 and a UE 104.
  • BS 102 includes various processors (e.g., 320, 330, 338, and 340) , antennas 334a-t (collectively 334) , transceivers 332a-t (collectively 332) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source 312) and wireless reception of data (e.g., data sink 339) .
  • BS 102 may send and receive data between BS 102 and UE 104.
  • BS 102 includes controller/processor 340, which may be configured to implement various functions described herein related to wireless communications.
  • UE 104 includes various processors (e.g., 358, 364, 366, and 380) , antennas 352a-r (collectively 352) , transceivers 354a-r (collectively 354) , which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., retrieved from data source 362) and wireless reception of data (e.g., provided to data sink 360) .
  • UE 104 includes controller/processor 380, which may be configured to implement various functions described herein related to wireless communications.
  • BS 102 includes a transmit processor 320 that may receive data from a data source 312 and control information from a controller/processor 340.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical HARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , and/or others.
  • the data may be for the physical downlink shared channel (PDSCH) , in some examples.
  • Transmit processor 320 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor 320 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , PBCH demodulation reference signal (DMRS) , and channel state information reference signal (CSI-RS) .
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • DMRS PBCH demodulation reference signal
  • CSI-RS channel state information reference signal
  • Transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 332a-332t.
  • Each modulator in transceivers 332a-332t may process a respective output symbol stream to obtain an output sample stream.
  • Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from the modulators in transceivers 332a-332t may be transmitted via the antennas 334a-334t, respectively.
  • UE 104 In order to receive the downlink transmission, UE 104 includes antennas 352a-352r that may receive the downlink signals from the BS 102 and may provide received signals to the demodulators (DEMODs) in transceivers 354a-354r, respectively.
  • Each demodulator in transceivers 354a-354r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples to obtain received symbols.
  • MIMO detector 356 may obtain received symbols from all the demodulators in transceivers 354a-354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data sink 360, and provide decoded control information to a controller/processor 380.
  • UE 104 further includes a transmit processor 364 that may receive and process data (e.g., for the PUSCH) from a data source 362 and control information (e.g., for the physical uplink control channel (PUCCH) ) from the controller/processor 380. Transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) . The symbols from the transmit processor 364 may be precoded by a TX MIMO processor 366 if applicable, further processed by the modulators in transceivers 354a-354r (e.g., for SC-FDM) , and transmitted to BS 102.
  • data e.g., for the PUSCH
  • control information e.g., for the physical uplink control channel (PUCCH)
  • Transmit processor 364 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 364 may
  • the uplink signals from UE 104 may be received by antennas 334a-t, processed by the demodulators in transceivers 332a-332t, detected by a MIMO detector 336 if applicable, and further processed by a receive processor 338 to obtain decoded data and control information sent by UE 104.
  • Receive processor 338 may provide the decoded data to a data sink 339 and the decoded control information to the controller/processor 340.
  • Memories 342 and 382 may store data and program codes for BS 102 and UE 104, respectively.
  • Scheduler 344 may schedule UEs for data transmission on the downlink and/or uplink.
  • BS 102 may be described as transmitting and receiving various types of data associated with the methods described herein.
  • “transmitting” may refer to various mechanisms of outputting data, such as outputting data from data source 312, scheduler 344, memory 342, transmit processor 320, controller/processor 340, TX MIMO processor 330, transceivers 332a-t, antenna 334a-t, and/or other aspects described herein.
  • “receiving” may refer to various mechanisms of obtaining data, such as obtaining data from antennas 334a-t, transceivers 332a-t, RX MIMO detector 336, controller/processor 340, receive processor 338, scheduler 344, memory 342, and/or other aspects described herein.
  • UE 104 may likewise be described as transmitting and receiving various types of data associated with the methods described herein.
  • transmitting may refer to various mechanisms of outputting data, such as outputting data from data source 362, memory 382, transmit processor 364, controller/processor 380, TX MIMO processor 366, transceivers 354a-t, antenna 352a-t, and/or other aspects described herein.
  • receiving may refer to various mechanisms of obtaining data, such as obtaining data from antennas 352a-t, transceivers 354a-t, RX MIMO detector 356, controller/processor 380, receive processor 358, memory 382, and/or other aspects described herein.
  • a processor may be configured to perform various operations, such as those associated with the methods described herein, and transmit (output) to or receive (obtain) data from another interface that is configured to transmit or receive, respectively, the data.
  • FIGS. 4A, 4B, 4C, and 4D depict aspects of data structures for a wireless communications network, such as wireless communications network 100 of FIG. 1.
  • FIG. 4A is a diagram 400 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure
  • FIG. 4B is a diagram 430 illustrating an example of DL channels within a 5G subframe
  • FIG. 4C is a diagram 450 illustrating an example of a second subframe within a 5G frame structure
  • FIG. 4D is a diagram 480 illustrating an example of UL channels within a 5G subframe.
  • Wireless communications systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. Such systems may also support half-duplex operation using time division duplexing (TDD) .
  • OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth (e.g., as depicted in FIGS. 4B and 4D) into multiple orthogonal subcarriers. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and/or in the time domain with SC-FDM.
  • a wireless communications frame structure may be frequency division duplex (FDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for either DL or UL.
  • Wireless communications frame structures may also be time division duplex (TDD) , in which, for a particular set of subcarriers, subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplex
  • TDD time division duplex
  • the wireless communications frame structure is TDD where D is DL, U is UL, and X is flexible for use between DL/UL.
  • UEs may be configured with a slot format through a received slot format indicator (SFI) (dynamically through DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) .
  • SFI received slot format indicator
  • DCI DL control information
  • RRC radio resource control
  • a 10 ms frame is divided into 10 equally sized 1 ms subframes.
  • Each subframe may include one or more time slots.
  • each slot may include 7 or 14 symbols, depending on the slot format.
  • Subframes may also include mini-slots, which generally have fewer symbols than an entire slot.
  • Other wireless communications technologies may have a different frame structure and/or different channels.
  • the number of slots within a subframe is based on a slot configuration and a numerology. For example, for slot configuration 0, different numerologies ( ⁇ ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology ⁇ , there are 14 symbols/slot and 2 ⁇ slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 ⁇ ⁇ 15 kHz, where ⁇ is the numerology 0 to 5.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the slot duration is 0.25 ms
  • the subcarrier spacing is 60 kHz
  • the symbol duration is approximately 16.67 ⁇ s.
  • a resource grid may be used to represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends, for example, 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
  • some of the REs carry reference (pilot) signals (RS) for a UE (e.g., UE 104 of FIGS. 1 and 3) .
  • the RS may include demodulation RS (DMRS) and/or channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DMRS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and/or phase tracking RS (PT-RS) .
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIG. 4B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including, for example, nine RE groups (REGs) , each REG including, for example, four consecutive REs in an OFDM symbol.
  • CCEs control channel elements
  • REGs RE groups
  • a primary synchronization signal may be within symbol 2 of particular subframes of a frame.
  • the PSS is used by a UE (e.g., 104 of FIGS. 1 and 3) to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal may be within symbol 4 of particular subframes of a frame.
  • the SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DMRS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block.
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and/or paging messages.
  • SIBs system information blocks
  • some of the REs carry DMRS (indicated as R for one particular configuration, but other DMRS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DMRS for the PUCCH and DMRS for the PUSCH.
  • the PUSCH DMRS may be transmitted, for example, in the first one or two symbols of the PUSCH.
  • the PUCCH DMRS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • UE 104 may transmit sounding reference signals (SRS) .
  • the SRS may be transmitted, for example, in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 4D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and HARQ ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • a UE it is important for a UE to know which assumptions it can make on a channel corresponding to different transmissions. For example, the UE may need to know which reference signals it can use to estimate the channel in order to decode a transmitted signal (e.g., PDCCH or PDSCH) . It may also be important for the UE to be able to report relevant channel state information (CSI) to the BS (gNB) for scheduling, link adaptation, and/or beam management purposes.
  • CSI channel state information
  • gNB BS
  • the concept of quasi co-location (QCL) and transmission configuration indicator (TCI) states is used to convey information about these assumptions.
  • TCI states generally include configurations such as QCL-relationships, for example, between the DL RSs in one CSI-RS set and the PDSCH DMRS ports.
  • a UE may be configured with up to M TCI-States. Configuration of the M TCI-States can come about via higher layer signalling, while a UE may be signalled to decode PDSCH according to a detected PDCCH with DCI indicating one of the TCI states.
  • Each configured TCI state may include one RS set TCI-RS-SetConfig that indicates different QCL assumptions between certain source and target signals.
  • TCI-RS-SetConfig may indicate a source reference signal (RS) is indicated in the top block and is associated with a target signal indicated in the bottom block.
  • a target signal generally refers to a signal for which channel properties may be inferred by measuring those channel properties for an associated source signal.
  • a UE may use the source RS to determine various channel parameters, depending on the associated QCL type, and use those various channel properties (determined based on the source RS) to process the target signal.
  • a target RS does not necessarily need to be PDSCH’s DMRS, rather it can be any other RS: PUSCH DMRS, CSIRS, TRS, and SRS.
  • Each TCI-RS-SetConfig may contain various parameters. These parameters can, for example, configure quasi co-location relationship (s) between reference signals in the RS set and the DM-RS port group of the PDSCH.
  • the RS set contains a reference to either one or two DL RSs and an associated quasi co-location type (QCL-Type) for each one configured by the higher layer parameter QCL-Type.
  • QCL-Type quasi co-location type
  • the QCL types can take on a variety of arrangements. For example, QCL types may not be the same, regardless of whether the references are to the same DL RS or different DL RSs.
  • SSB is associated with Type C QCL for P-TRS
  • CSI-RS for beam management (CSIRS–BM) is associated with Type D QCL.
  • QCL information and/or types may in some scenarios depend on or be a function of other information.
  • the quasi co-location (QCL) types indicated to the UE can be based on higher layer parameter QCL-Type and may take one or a combination of the following types:
  • QCL-TypeA ⁇ Doppler shift, Doppler spread, average delay, delay spread ⁇ ,
  • Spatial QCL assumptions may be used to help a UE to select an analog Rx beam (e.g., during beam management procedures) .
  • an SSB resource indicator may indicate a same beam for a previous reference signal should be used for a subsequent transmission.
  • An initial CORESET (e.g., CORESET ID 0 or simply CORESET#0) in NR may be identified during initial access by a UE (e.g., via a field in the MIB) .
  • a ControlResourceSet information element (CORESET IE) sent via radio resource control (RRC) signaling may convey information regarding a CORESET configured for a UE.
  • the CORESET IE generally includes a CORESET ID, an indication of frequency domain resources (e.g., number of RBs) assigned to the CORESET, contiguous time duration of the CORESET in a number of symbols, and Transmission Configuration Indicator (TCI) states.
  • TCI Transmission Configuration Indicator
  • a subset of the TCI states provide quasi co-location (QCL) relationships between DL RS (s) in one RS set (e.g., TCI-Set) and PDCCH demodulation RS (DMRS) ports.
  • a particular TCI state for a given UE may be conveyed to the UE by the Medium Access Control (MAC) Control Element (MAC-CE) .
  • the particular TCI state is generally selected from the set of TCI states conveyed by the CORESET IE, with the initial CORESET (CORESET#0) generally configured via MIB.
  • Search space information may also be provided via RRC signaling.
  • the SearchSpace IE is another RRC IE that defines how and where to search for PDCCH candidates for a given CORESET. Each search space is associated with one CORESET.
  • the SearchSpace IE identifies a search space configured for a CORESET by a search space ID.
  • the search space ID associated with CORESET #0 is SearchSpace ID #0.
  • the search space is generally configured via PBCH (MIB) .
  • Codebook-based UL transmission is based on BS configuration and can be used in cases where reciprocity may not hold.
  • FIG. 5 is a call flow diagram 500 illustrating an example of conventional codebook based UL transmission using a wideband precoder.
  • a UE transmits (non-precoded) SRS with up to 2 SRS resources (with each resource having 1, 2 or 4 ports) .
  • the gNB measures the SRS and, based on the measurement, selects one SRS resource and a wideband precoder to be applied to the SRS ports within the selected resource.
  • the gNB configures the UE with the selected SRS resource via an SRS resource indictor (SRI) and with the wideband precoder via a transmit precoder matrix indicator (TPMI) .
  • SRI SRS resource indictor
  • TPMI transmit precoder matrix indicator
  • the SRI and TPMI may be configured via DCI format 0_1.
  • SRI and TPMI may be configured via RRC or DCI.
  • the UE determines the selected SRS resource from the SRI and precoding from TPMI and transmits PUSCH accordingly.
  • FIG. 6 is a call flow diagram 600 illustrating an example of non-codebook based UL transmission.
  • a UE transmits (precoded) SRS. While the example shows 2 SRS resources, the UE may transmit with up to 4 SRS resources (with each resource having 1 port) .
  • the gNB measures the SRS and, based on the measurement, selects one or more SRS resource. In this case, since the UE sent the SRS precoded, by selecting the SRS resource, the gNB is effectively also selecting precoding.
  • each SRS resource corresponds to a layer.
  • the precoder of the layer is actually the precoder of the SRS which is emulated by the UE. Selecting N SRS resources means the rank is N.
  • the UE is to transmit PUSCH using the same precoder as the SRS.
  • the gNB configures the UE with the selected SRS resource via an SRS resource indictor (SRI) .
  • SRI SRS resource indictor
  • the SRI may be configured via DCI format 0_1.
  • the SRI may be configured via RRC or DCI.
  • aspects of the present disclosure provide techniques that may help resolve the potential conflict when the UE is provided multiple beam indications for SRS transmissions.
  • the UE may be configured with an SRS resource set associated with a DL RS and also one or more unified TCI states.
  • the UE may be configured with a list of TCI state configurations.
  • the configuration information may also include information for providing a reference signal (RS) for the QCL for Demodulation Reference Signal (DM-RS) of PDSCH and DM-RS of PDCCH in a component carrier (CC) , Channel State Information Reference Signal (CSI-RS) , and may also provide a reference for determining uplink (UL) transmit (TX) spatial filter for dynamic-grant and configured-grant based physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) resource in a CC, and for SRS.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the UE may measure the associated DL-RS and calculate a precoder for SRS transmission, based on the measurement. The UE may then transmit SRS using the precoder and 1) a first beam indicated via DL-RS, or 2) a second beam indicated via one of the unified TCI states. Which of the indicated beams is used may be determined in accordance with techniques described below.
  • the UE may calculate the precoder used for the SRS transmission of SRS based on a measurement of an associated non-zero-power (NZP) Channel State Information Reference Signal (CSI-RS) resource.
  • NZP non-zero-power
  • CSI-RS Channel State Information Reference Signal
  • the UE may be configured with only one NZP CSI-RS resource for the SRS resource set with higher layer parameter usage in SRS-ResourceSet set to 'nonCodebook' if configured. If periodic or semi-persistent SRS resource set is configured, the NZP-CSI-RS-ResourceId for measurement may be indicated via a higher layer parameter associatedCSI-RS in SRS-ResourceSet.
  • the UE may not expect to be configured with both spatialRelationInfo for SRS resource and associatedCSI-RS in SRS-ResourceSet for SRS resource set.
  • a beam indication for an SRS resource set may be provided by an associated CSI-RS and also by unified TCI states.
  • aspects of the present disclosure provide techniques that may help a UE to resolve the conflict between the two beam indications.
  • a first option may help remove ambiguity when a UE is configured with both unified TCI for an SRS resource and associatedCSI-RS in SRS-ResourceSet for the corresponding SRS resource set.
  • the UE may be configured with only unified TCI for the associatedCSI-RS configured for the SRS-ResourceSet.
  • the result may be the same beam, thus removing ambiguity.
  • the UE may expect to be configured to share the indicated unified TCI for both SRS resource and for the associatedCSI-RS in SRS-ResourceSet for SRS resource set.
  • the UE may apply the same indication to the SRS resource in SRS-ResourceSet, without separate signaling.
  • the UE may expect to be indicated with a same unified TCI for SRS resource and for the associatedCSI-RS in SRS-ResourceSet for SRS resource set.
  • the configuration information may include information for providing a reference signal (RS) for the QCL in TCI for Channel State Information Reference Signal (CSI-RS) and for SRS.
  • RS reference signal
  • F or non-codebook based transmission there may be a first unified TCI indicated for SRS resource in SRS-ResourceSet for SRS resource set, and there may also be a second unified TCI for the associatedCSI-RS in SRS-ResourceSet for SRS resource set. In some cases, these two unified TCIs may be different.
  • the UE may prioritize one of the TCI when selecting a beam for SRS transmission. For example, the UE could prioritize the first unified TCI to SRS resource in SRS-ResourceSet for SRS resource set when selecting the beam. For another example, the UE could prioritize the second unified TCI to associatedCSI-RS when selecting the beam.
  • aspects of the present disclosure may help a UE select an optimal beam, which may help improve performance.
  • FIG. 8 shows a method 800 for wireless communications by a UE, such as UE 104 of FIGS. 1 and 3.
  • Method 800 begins at step 805 with obtaining signaling configuring the UE with: 1) a SRS resource set associated with a downlink reference signal, and 2) one or more unified TCI states.
  • the operations of this step refer to, or may be performed by, circuitry for obtaining and/or code for obtaining as described with reference to FIG. 9.
  • Method 800 then proceeds to step 810 with measuring the associated downlink reference signal.
  • the operations of this step refer to, or may be performed by, circuitry for measuring and/or code for measuring as described with reference to FIG. 9.
  • Method 800 then proceeds to step 815 with calculating a precoder based on the measurement.
  • the operations of this step refer to, or may be performed by, circuitry for calculating and/or code for calculating as described with reference to FIG. 9.
  • Method 800 then proceeds to step 820 with outputting for transmission an SRS on one or more SRS resources of the SRS resource set, using the precoder and 1) a first beam indicated via the associated downlink reference signal, or 2) a second beam indicated via one of the one or more unified TCI states.
  • the operations of this step refer to, or may be performed by, circuitry for outputting and/or code for outputting as described with reference to FIG. 9.
  • the signaling indicates a plurality of SRS resource sets including the SRS resource set, each SRS resource set including one or more SRS resources.
  • each of the unified TCI states indicates a common beam associated with multiple signals.
  • the associated downlink reference signal comprise a CSI-RS.
  • the one or more unified TCI states comprise a unified TCI state for the CSI-RS.
  • the signaling lacks an individual per-channel beam indication for the CSI-RS.
  • outputting the SRS for transmission comprises: after obtaining signaling indicating a unified TCI state for the associated CSI-RS, applying the second beam when outputting the SRS for transmission.
  • the method 800 further includes, after obtaining signaling indicating a unified TCI state for the associated CSI-RS, obtaining additional signaling indicating the UE is to apply the second beam when transmitting SRS on one or more SRS resources of the SRS resource set.
  • the operations of this step refer to, or may be performed by, circuitry for obtaining and/or code for obtaining as described with reference to FIG. 9.
  • the one or more unified TCI states comprise: a first unified TCI state indicated for an SRS resource in the SRS resource set; and a second unified TCI state indicated for the associated CSI-RS.
  • the method 800 further includes selecting the second beam for transmitting the SRS based on the first unified TCI state or the second unified TCI state.
  • the operations of this step refer to, or may be performed by, circuitry for selecting and/or code for selecting as described with reference to FIG. 9.
  • method 800 may be performed by an apparatus, such as communications device 900 of FIG. 9, which includes various components operable, configured, or adapted to perform the method 800.
  • Communications device 900 is described below in further detail.
  • FIG. 8 is just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.
  • FIG. 9 depicts aspects of an example communications device 900.
  • communications device 900 is a user equipment, such as UE 104 described above with respect to FIGS. 1 and 3.
  • the communications device 900 includes a processing system 905 coupled to the transceiver 975 (e.g., a transmitter and/or a receiver) .
  • the transceiver 975 is configured to transmit and receive signals for the communications device 900 via the antenna 980, such as the various signals as described herein.
  • the processing system 905 may be configured to perform processing functions for the communications device 900, including processing signals received and/or to be transmitted by the communications device 900.
  • the processing system 905 includes one or more processors 910.
  • the one or more processors 910 may be representative of one or more of receive processor 358, transmit processor 364, TX MIMO processor 366, and/or controller/processor 380, as described with respect to FIG. 3.
  • the one or more processors 910 are coupled to a computer-readable medium/memory 940 via a bus 970.
  • the computer-readable medium/memory 940 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 910, cause the one or more processors 910 to perform the method 800 described with respect to FIG. 8, or any aspect related to it.
  • instructions e.g., computer-executable code
  • computer-readable medium/memory 940 stores code (e.g., executable instructions) , such as code for obtaining 945, code for measuring 950, code for calculating 955, code for outputting 960, and code for selecting 965.
  • code e.g., executable instructions
  • processing of the code for obtaining 945, code for measuring 950, code for calculating 955, code for outputting 960, and code for selecting 965 may cause the communications device 900 to perform the method 800 described with respect to FIG. 8, or any aspect related to it.
  • the one or more processors 910 include circuitry configured to implement (e.g., execute) the code stored in the computer-readable medium/memory 940, including circuitry such as circuitry for obtaining 915, circuitry for measuring 920, circuitry for calculating 925, circuitry for outputting 930, and circuitry for selecting 935. Processing with circuitry for obtaining 915, circuitry for measuring 920, circuitry for calculating 925, circuitry for outputting 930, and circuitry for selecting 935 may cause the communications device 900 to perform the method 800 described with respect to FIG. 8, or any aspect related to it.
  • Various components of the communications device 900 may provide means for performing the method 800 described with respect to FIG. 8, or any aspect related to it.
  • means for transmitting, sending or outputting for transmission may include transceivers 354 and/or antenna (s) 352 of the UE 104 illustrated in FIG. 3 and/or the transceiver 975 and the antenna 980 of the communications device 900 in FIG. 9.
  • Means for receiving or obtaining may include transceivers 354 and/or antenna (s) 352 of the UE 104 illustrated in FIG. 3 and/or the transceiver 975 and the antenna 980 of the communications device 900 in FIG. 9.
  • a device may have an interface to output a frame for transmission (a means for outputting) .
  • a processor may output a frame, via a bus interface, to a radio frequency (RF) front end for transmission.
  • a device may have an interface to obtain a frame received from another device (a means for obtaining) .
  • a processor may obtain (or receive) a frame, via a bus interface, from an RF front end for reception.
  • the interface to output a frame for transmission and the interface to obtain a frame (which may be referred to as first and second interfaces herein) may be the same interface.
  • Means for establishing, means for measuring and means for calculating may include any of the various processors and/or transceivers shown in FIGs. 3 or 9.
  • a method for wireless communications at a UE comprising: obtaining signaling configuring the UE with: 1) a SRS resource set associated with a downlink reference signal, and 2) one or more unified TCI states; measuring the associated downlink reference signal; calculating a precoder based on the measurement; and outputting for transmission an SRS on one or more SRS resources of the SRS resource set, using the precoder and 1) a first beam indicated via the associated downlink reference signal, or 2) a second beam indicated via one of the one or more unified TCI states.
  • Clause 2 The method of clause 1, wherein the signaling indicates a plurality of SRS resource sets including the SRS resource set, each SRS resource set including one or more SRS resources.
  • Clause 3 The method of any one of clauses 1 and 2, wherein each of the unified TCI states indicates a common beam associated with multiple signals.
  • Clause 4 The method of clause 3, wherein the associated downlink reference signal comprise a CSI-RS.
  • Clause 5 The method of clause 4, wherein the one or more unified TCI states comprise a unified TCI state for the CSI-RS.
  • Clause 6 The method of clause 5, wherein the signaling lacks an individual per-channel beam indication for the CSI-RS.
  • Clause 7 The method of clause 4, wherein outputting the SRS for transmission comprises: after obtaining signaling indicating a unified TCI state for the associated CSI-RS, applying the second beam when outputting the SRS for transmission.
  • Clause 8 The method of clause 4, further comprising, after obtaining signaling indicating a unified TCI state for the associated CSI-RS: obtaining additional signaling indicating the UE is to apply the second beam when transmitting SRS on one or more SRS resources of the SRS resource set.
  • Clause 9 The method of clause 4, wherein the one or more unified TCI states comprise: a first unified TCI state indicated for an SRS resource in the SRS resource set; and a second unified TCI state indicated for the associated CSI-RS.
  • Clause 10 The method of clause 9, further comprising: selecting the second beam for transmitting the SRS based on the first unified TCI state or the second unified TCI state.
  • Clause 11 An apparatus, comprising: a memory comprising executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform a method in accordance with any one of Clauses 1-10.
  • Clause 12 An apparatus, comprising means for performing a method in accordance with any one of Clauses 1-10.
  • Clause 13 A non-transitory computer-readable medium comprising executable instructions that, when executed by a processor of an apparatus, cause the apparatus to perform a method in accordance with any one of Clauses 1-10.
  • Clause 14 A computer program product embodied on a computer-readable storage medium comprising code for performing a method in accordance with any one of Clauses 1-10.
  • a user equipment comprising: at least one transceiver; a memory comprising instructions; and one or more processors configured to execute the instructions and cause the station to perform a method in accordance with any one of Clauses 1-10, wherein the at least one transceiver is configured to at least one of receive the signaling or transmit the SRS.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • the scope of the disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC) , or any other such configuration.
  • SoC system on a chip
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the methods disclosed herein comprise one or more actions for achieving the methods.
  • the method actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific actions may be modified without departing from the scope of the claims.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains aspects de la présente divulgation concernent un procédé de communications sans fil dans un équipement d'utilisateur (UE). Le procédé inclut de manière générale l'obtention d'une signalisation configurant l'UE avec : 1) un ensemble de ressources de signal de référence de sondage (SRS) associé à un signal de référence de liaison descendante, et 2) un ou plusieurs états d'indicateur de configuration de transmission (TCI) unifiés, la mesure du signal de référence de liaison descendante associé, le calcul d'un précodeur sur la base de la mesure, et la fourniture aux fins de transmission d'un signal SRS sur une ou plusieurs ressources SRS de l'ensemble de ressources SRS, à l'aide du précodeur et 1) d'un premier faisceau indiqué via le signal de référence de liaison descendante associé, ou 2) d'un second faisceau indiqué via un du ou des états TCI unifiés.
PCT/CN2022/088897 2022-04-25 2022-04-25 Indicateur unifié de configuration de transmission pour un ensemble de signaux de référence de sondage WO2023205986A1 (fr)

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CN111901021A (zh) * 2020-02-18 2020-11-06 中兴通讯股份有限公司 确定发送参数、发送功率、phr的方法、装置及介质
CN111901020A (zh) * 2020-01-21 2020-11-06 中兴通讯股份有限公司 一种功率控制参数确定方法、设备和存储介质
CN112787786A (zh) * 2019-11-08 2021-05-11 维沃移动通信有限公司 信道信息的确定方法、网络设备及终端设备
WO2021143847A1 (fr) * 2020-01-15 2021-07-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé, dispositif de terminal et dispositif de réseau pour une transmission de canal physique partagé de liaison montante
WO2021174526A1 (fr) * 2020-03-06 2021-09-10 Qualcomm Incorporated Transmission à entrées multiples et sorties multiples en liaison montante par défaut avant une activation d'état d'indication de configuration de transmission en liaison montante
WO2021204225A1 (fr) * 2020-04-10 2021-10-14 FG Innovation Company Limited Procédé de réalisation d'une transmission de canal physique partagé de liaison montante non basée sur un livre de codes et dispositif associé
WO2021252631A1 (fr) * 2020-06-09 2021-12-16 Qualcomm Incorporated Techniques pour signal de référence de liaison montante permettant des communications sans fil non basées sur un livre de codes
WO2022029933A1 (fr) * 2020-08-05 2022-02-10 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil, et station de base

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112787786A (zh) * 2019-11-08 2021-05-11 维沃移动通信有限公司 信道信息的确定方法、网络设备及终端设备
WO2021143847A1 (fr) * 2020-01-15 2021-07-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé, dispositif de terminal et dispositif de réseau pour une transmission de canal physique partagé de liaison montante
CN111901020A (zh) * 2020-01-21 2020-11-06 中兴通讯股份有限公司 一种功率控制参数确定方法、设备和存储介质
CN111901021A (zh) * 2020-02-18 2020-11-06 中兴通讯股份有限公司 确定发送参数、发送功率、phr的方法、装置及介质
WO2021174526A1 (fr) * 2020-03-06 2021-09-10 Qualcomm Incorporated Transmission à entrées multiples et sorties multiples en liaison montante par défaut avant une activation d'état d'indication de configuration de transmission en liaison montante
WO2021204225A1 (fr) * 2020-04-10 2021-10-14 FG Innovation Company Limited Procédé de réalisation d'une transmission de canal physique partagé de liaison montante non basée sur un livre de codes et dispositif associé
WO2021252631A1 (fr) * 2020-06-09 2021-12-16 Qualcomm Incorporated Techniques pour signal de référence de liaison montante permettant des communications sans fil non basées sur un livre de codes
WO2022029933A1 (fr) * 2020-08-05 2022-02-10 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil, et station de base

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