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WO2025207296A1 - Procédés et appareils de rapport d'informations d'état de canal pour une formation de faisceau hybride - Google Patents

Procédés et appareils de rapport d'informations d'état de canal pour une formation de faisceau hybride

Info

Publication number
WO2025207296A1
WO2025207296A1 PCT/US2025/018891 US2025018891W WO2025207296A1 WO 2025207296 A1 WO2025207296 A1 WO 2025207296A1 US 2025018891 W US2025018891 W US 2025018891W WO 2025207296 A1 WO2025207296 A1 WO 2025207296A1
Authority
WO
WIPO (PCT)
Prior art keywords
csi
resources
value
resource
cqi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/018891
Other languages
English (en)
Inventor
Mohammad Irfan
Moon Il Lee
Loic CANONNE-VELASQUEZ
Afshin Haghighat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital Patent Holdings Inc
Original Assignee
InterDigital Patent Holdings Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by InterDigital Patent Holdings Inc filed Critical InterDigital Patent Holdings Inc
Publication of WO2025207296A1 publication Critical patent/WO2025207296A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • 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—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • 5G new radio supports analog beamforming of channel state information (CSI) reference signal (RS) (CSI-RS) resources.
  • CSI-RS channel state information reference signal
  • a resource set can have up to eight CSI-RS resources with up to eight CSI-RS antenna ports in each CSI-RS resource, with a maximum of 32 CSI-RS antenna ports.
  • 5G NR also supports two CSI-RS resources in a CSI-RS resource set with 16 CSI-RS antenna ports in each CSI-RS resource.
  • 5G NR supports determining and reporting a CSI based on a single CSI-RS resource in the CSI-RS resource set.
  • the processor may be configured to receive a CSI-RS resource selection criterion.
  • the CSI-RS resource selection criterion may include one or more of a target reference signal received power (RSRP) value, a target rank value, or a target channel quality indicator (CQI) value.
  • the processor may be configured to select the one or more CSI-RS resources from the plurality of CSI-RS resources based on the CSI-RS resource selection criterion.
  • the one or more CSI-RS resources may include a minimum number of CSI-RS resources capable of achieving one or more of a maximum aggregated RSRP value that is greater than or equal to a target reference signal received power (RSRP) value, a maximum aggregated channel quality indicator (CQI) value that is greater than or equal to a target CQI value, or a maximum aggregated rank value that is greater than or equal to a target rank value.
  • RSRP target reference signal received power
  • CQI channel quality indicator
  • the indication of the one or more CSI-RS resources may include an indication of one or more of a respective rank value for each of the one or more CSI-RS resources, a respective channel quality indicator (CQI) value for each of the one or more CSI-RS resources, a respective precoding matrix indicator (PM I) for each of the one or more CSI-RS resources, or a respective reference signal received power (RSRP) value for each of the one or more CSI-RS resources.
  • CQI channel quality indicator
  • PM I precoding matrix indicator
  • RSRP reference signal received power
  • the indication of the one or more CSI-RS resources may include an indication of one or more of an aggregated rank value for the one or more CSI-RS resources, an aggregated channel quality indicator (CQI) value for the one or more CSI-RS resources, an aggregated precoding matrix indicator (PMI) for the one or more CSI-RS resources, or an aggregated reference signal received power (RSRP) value for the one or more CSI-RS resources.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RSRP reference signal received power
  • a method may be implemented by a wireless transmit/receive unit (WTRU), and may include receiving configuration information.
  • the configuration information may indicate one or more of a plurality of channel state information (CSI) reference signal (RS) resources in a CSI-RS resource set.
  • the configuration information may indicate a target performance requirement.
  • One or more CSI-RS resources may be selected from the plurality of CSI-RS resources based on characteristics of the one or more CSI- RS resources and the target performance requirement.
  • a CSI report may be sent.
  • the CSI report may include an indication of the one or more selected CSI-RS resources.
  • FIG. 1A is a system diagram illustrating an example communications system in which one or more disclosed embodiments may be implemented
  • FIG. 1 B is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;
  • WTRU wireless transmit/receive unit
  • FIG. 1C is a system diagram illustrating an example radio access network (RAN) and an example core network (CN) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;
  • RAN radio access network
  • CN core network
  • FIG. 1 D is a system diagram illustrating a further example RAN and a further example CN that may be used within the communications system illustrated in FIG. 1A according to an embodiment; and [0029] FIG. 2 is a diagram illustrating an example procedure for channel state information (CSI) reporting for hybrid beamforming according to an embodiment.
  • CSI channel state information
  • the communications systems 100 may employ one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), zero-tail (ZT) unique-word (UW) discreet Fourier transform (DFT) spread OFDM (ZT UW DTS-s OFDM), unique word OFDM (UW-OFDM), resource block-filtered OFDM, filter bank multicarrier (FBMC), and the like.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • ZT zero-tail
  • ZT UW unique-word
  • DFT discreet Fourier transform
  • OFDM unique word OFDM
  • UW-OFDM resource block-filtered OFDM
  • FBMC filter bank multicarrier
  • the WTRUs 102a, 102b, 102c, 102d may be configured to transmit and/or receive wireless signals and may include (or be) a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a subscription-based unit, a pager, a cellular telephone, a personal digital assistant (PDA), a smartphone, a laptop, a netbook, a personal computer, a wireless sensor, a hotspot or Mi-Fl device, an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD), a vehicle, a drone, a medical device and applications (e.g., remote surgery), an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts), a consumer electronics device, a device operating on commercial and/or industrial wireless networks,
  • UE user equipment
  • PDA personal digital assistant
  • HMD head-mounted display
  • the communications systems 100 may also include a base station 114a and/or a base station 114b.
  • Each of the base stations 114a, 114b may be any type of device configured to wirelessly interface with at least one of the WTRUs 102a, 102b, 102c, 102d, e.g., to facilitate access to one or more communication networks, such as the CN 106/115, the Internet 110, and/or the networks 112.
  • the cell associated with the base station 114a may be divided into three sectors.
  • the base station 114a may include three transceivers, i.e., one for each sector of the cell.
  • the base station 114a may employ multiple-input multiple output (MIMO) technology and may utilize multiple transceivers for each or any sector of the cell.
  • MIMO multiple-input multiple output
  • beamforming may be used to transmit and/or receive signals in desired spatial directions.
  • the base stations 114a, 114b may communicate with one or more of the WTRUs 102a, 102b, 102c, 102d over an air interface 116, which may be any suitable wireless communication link (e.g., radio frequency (RF), microwave, centimeter wave, micrometer wave, infrared (IR), ultraviolet (UV), visible light, etc.).
  • the air interface 116 may be established using any suitable radio access technology (RAT).
  • RAT radio access technology
  • the communications system 100 may be a multiple access system and may employ one or more channel access schemes, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and the like.
  • the base station 114a in the RAN 104/113 and the WTRUs 102a, 102b, 102c may implement a radio technology such as Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA), which may establish the air interface 116 using wideband CDMA (WCDMA).
  • WCDMA may include communication protocols such as High-Speed Packet Access (HSPA) and/or Evolved HSPA (HSPA+).
  • HSPA High-Speed Packet Access
  • HSPA+ Evolved HSPA
  • HSPA may include High-Speed Downlink Packet Access (HSDPA) and/or High-Speed Uplink Packet Access (HSUPA).
  • HSDPA High-Speed Downlink Packet Access
  • HSUPA High-Speed Uplink Packet Access
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology such as Evolved UMTS Terrestrial Radio Access (E-UTRA), which may establish the air interface 116 using Long Term Evolution (LTE) and/or LTE-Advanced (LTE-A) and/or LTE-Advanced Pro (LTE-A Pro).
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-Advanced Pro
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement multiple radio access technologies.
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement LTE radio access and NR radio access together, for instance using dual connectivity (DC) principles.
  • DC dual connectivity
  • the air interface utilized by WTRUs 102a, 102b, 102c may be characterized by multiple types of radio access technologies and/or transmissions sent to/from multiple types of base stations (e.g ., an eNB and a gNB).
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement radio technologies such as IEEE 802.11 (i.e., Wireless Fidelity (Wi-Fi), IEEE 802.16 (i.e., Worldwide Interoperability for Microwave Access (WiMAX)), CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, Interim Standard 2000 (IS-2000), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), Global System for Mobile communications (GSM), Enhanced Data rates for GSM Evolution (EDGE), GSM EDGE (GERAN), and the like.
  • IEEE 802.11 i.e., Wireless Fidelity (Wi-Fi)
  • IEEE 802.16 i.e., Worldwide Interoperability for Microwave Access (WiMAX)
  • CDMA2000, CDMA2000 1X, CDMA2000 EV-DO Code Division Multiple Access 2000
  • IS-95 Interim Standard 95
  • IS-856 Interim Standard 856
  • GSM Global
  • the base station 114b in FIG. 1A may be a wireless router, Home Node-B, Home eNode-B, or access point, for example, and may utilize any suitable RAT for facilitating wireless connectivity in a localized area, such as a place of business, a home, a vehicle, a campus, an industrial facility, an air corridor (e.g., for use by drones), a roadway, and the like.
  • the base station 114b and the WTRUs 102c, 102d may implement a radio technology such as IEEE 802.11 to establish a wireless local area network (WLAN).
  • WLAN wireless local area network
  • the base station 114b and the WTRUs 102c, 102d may implement a radio technology such as IEEE 802.15 to establish a wireless personal area network (WPAN).
  • the base station 114b and the WTRUs 102c, 102d may utilize a cellular-based RAT (e.g., WCDMA, CDMA2000, GSM, LTE, LTE-A, LTE-A Pro, NR, etc.) to establish any of a small cell, picocell or femtocell.
  • a cellular-based RAT e.g., WCDMA, CDMA2000, GSM, LTE, LTE-A, LTE-A Pro, NR, etc.
  • the base station 114b may have a direct connection to the Internet 110.
  • the base station 114b may not be required to access the Internet 110 via the CN 106/115.
  • the RAN 104/113 may be in communication with the CN 106/115, which may be any type of network configured to provide voice, data, applications, and/or voice over internet protocol (VoIP) services to one or more of the WTRUs 102a, 102b, 102c, 102d .
  • the data may have varying quality of service (QoS) requirements, such as differing throughput requirements, latency requirements, error tolerance requirements, reliability requirements, data throughput requirements, mobility requirements, and the like.
  • QoS quality of service
  • the CN 106/115 may provide call control, billing services, mobile location-based services, pre-paid calling, Internet connectivity, video distribution, etc., and/or perform high-level security functions, such as user authentication.
  • the RAN 104/113 and/or the CN 106/115 may be in direct or indirect communication with other RANs that employ the same RAT as the RAN 104/113 or a different RAT.
  • the CN 106/115 may also be in communication with another RAN (not shown) employing any of a GSM, UMTS, CDMA 2000, WiMAX, E-UTRA, or Wi-Fi radio technology.
  • Some or all of the WTRUs 102a, 102b, 102c, 102d in the communications system 100 may include multi-mode capabilities (e.g., the WTRUs 102a, 102b, 102c, 102d may include multiple transceivers for communicating with different wireless networks over different wireless links).
  • the WTRU 102c shown in FIG. 1A may be configured to communicate with the base station 114a, which may employ a cellular-based radio technology, and with the base station 114b, which may employ an IEEE 802 radio technology.
  • FIG. 1 B is a system diagram illustrating an example WTRU 102.
  • the WTRU 102 may include a processor 118, a transceiver 120, a transmit/receive element 122, a speaker/microphone 124, a keypad 126, a display/touchpad 128, non-removable memory 130, removable memory 132, a power source 134, a global positioning system (GPS) chipset 136, and/or other elements/peripherals 138, among others.
  • GPS global positioning system
  • the processor 118 may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), a state machine, and the like.
  • the processor 118 may perform signal coding, data processing, power control, input/output processing, and/or any other functionality that enables the WTRU 102 to operate in a wireless environment.
  • the processor 118 may be coupled to the transceiver 120, which may be coupled to the transmit/receive element 122. While FIG. 1 B depicts the processor 118 and the transceiver 120 as separate components, it will be appreciated that the processor 118 and the transceiver 120 may be integrated together, e.g., in an electronic package or chip.
  • the transmit/receive element 122 may be configured to transmit signals to, or receive signals from, a base station (e.g., the base station 114a) over the air interface 116.
  • the transmit/receive element 122 may be an antenna configured to transmit and/or receive RF signals.
  • the transmit/receive element 122 may be an emitter/detector configured to transmit and/or receive IR, UV, or visible light signals, for example.
  • the transmit/receive element 122 may be configured to transmit and/or receive both RF and light signals. It will be appreciated that the transmit/receive element 122 may be configured to transmit and/or receive any combination of wireless signals.
  • the WTRU 102 may include any number of transmit/receive elements 122.
  • the WTRU 102 may employ MIMO technology.
  • the WTRU 102 may include two or more transmit/receive elements 122 (e.g., multiple antennas) for transmitting and receiving wireless signals over the air interface 116.
  • the transceiver 120 may be configured to modulate the signals that are to be transmitted by the transmit/receive element 122 and to demodulate the signals that are received by the transmit/receive element 122.
  • the WTRU 102 may have multi-mode capabilities.
  • the transceiver 120 may include multiple transceivers for enabling the WTRU 102 to communicate via multiple RATs, such as NR and IEEE 802.11 , for example.
  • the processor 118 of the WTRU 102 may be coupled to, and may receive user input data from, the speaker/microphone 124, the keypad 126, and/or the display/touchpad 128 (e.g., a liquid crystal display (LCD) display unit or organic light-emitting diode (OLED) display unit).
  • the processor 118 may also output user data to the speaker/microphone 124, the keypad 126, and/or the display/touchpad 128.
  • the processor 118 may access information from, and store data in, any type of suitable memory, such as the non-removable memory 130 and/or the removable memory 132.
  • the non-removable memory 130 may include random-access memory (RAM), read-only memory (ROM), a hard disk, or any other type of memory storage device.
  • the removable memory 132 may include a subscriber identity module (SIM) card, a memory stick, a secure digital (SD) memory card, and the like.
  • SIM subscriber identity module
  • SD secure digital
  • the processor 118 may access information from, and store data in, memory that is not physically located on the WTRU 102, such as on a server or a home computer (not shown).
  • the processor 118 may receive power from the power source 134, and may be configured to distribute and/or control the power to the other components in the WTRU 102.
  • the power source 134 may be any suitable device for powering the WTRU 102.
  • the power source 134 may include one or more dry cell batteries (e.g ., nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel metal hydride (NiMH), lithium-ion (Li-ion), etc.), solar cells, fuel cells, and the like.
  • the processor 118 may also be coupled to the GPS chipset 136, which may be configured to provide location information (e.g., longitude and latitude) regarding the current location of the WTRU 102.
  • location information e.g., longitude and latitude
  • the WTRU 102 may receive location information over the air interface 116 from a base station (e.g., base stations 114a, 114b) and/or determine its location based on the timing of the signals being received from two or more nearby base stations. It will be appreciated that the WTRU 102 may acquire location information by way of any suitable locationdetermination method while remaining consistent with an embodiment.
  • the processor 118 may further be coupled to other elements/peripherals 138, which may include one or more software and/or hardware modules/units that provide additional features, functionality and/or wired or wireless connectivity.
  • the elements/peripherals 138 may include an accelerometer, an e-compass, a satellite transceiver, a digital camera (e.g., for photographs and/or video), a universal serial bus (USB) port, a vibration device, a television transceiver, a hands free headset, a Bluetooth® module, a frequency modulated (FM) radio unit, a digital music player, a media player, a video game player module, an Internet browser, a virtual reality and/or augmented reality (VR/AR) device, an activity tracker, and the like.
  • FM frequency modulated
  • the elements/peripherals 138 may include one or more sensors, the sensors may be one or more of a gyroscope, an accelerometer, a hall effect sensor, a magnetometer, an orientation sensor, a proximity sensor, a temperature sensor, a time sensor; a geolocation sensor; an altimeter, a light sensor, a touch sensor, a magnetometer, a barometer, a gesture sensor, a biometric sensor, and/or a humidity sensor.
  • a gyroscope an accelerometer, a hall effect sensor, a magnetometer, an orientation sensor, a proximity sensor, a temperature sensor, a time sensor; a geolocation sensor; an altimeter, a light sensor, a touch sensor, a magnetometer, a barometer, a gesture sensor, a biometric sensor, and/or a humidity sensor.
  • the WTRU 102 may include a full duplex radio for which transmission and reception of some or all of the signals (e.g., associated with particular subframes for both the uplink (e.g., for transmission) and downlink (e.g., for reception) may be concurrent and/or simultaneous.
  • the full duplex radio may include an interference management unit to reduce and or substantially eliminate self-interference via either hardware (e.g., a choke) or signal processing via a processor (e.g., a separate processor (not shown) or via processor 118).
  • the WTRU 102 may include a half-duplex radio for which transmission and reception of some or all of the signals (e.g., associated with particular subframes for either the uplink (e.g., for transmission) or the downlink (e.g., for reception)).
  • FIG. 1C is a system diagram illustrating the RAN 104 and the CN 106 according to an embodiment.
  • the RAN 104 may employ an E-UTRA radio technology to communicate with the WTRUs 102a, 102b, and 102c over the air interface 116.
  • the RAN 104 may also be in communication with the CN 106.
  • WLAN systems which may support multiple channels, and channel bandwidths, such as 802.11 n, 802.11 ac, 802.11 af, and 802.11 ah, include a channel which may be designated as the primary channel.
  • the primary channel may have a bandwidth equal to the largest common operating bandwidth supported by all STAs in the BSS.
  • the bandwidth of the primary channel may be set and/or limited by a STA, from among all STAs in operating in a BSS, which supports the smallest bandwidth operating mode.
  • the RAN 113 may include gNBs 180a, 180b, 180c, though it will be appreciated that the RAN 113 may include any number of gNBs while remaining consistent with an embodiment.
  • the gNBs 180a, 180b, 180c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the gNBs 180a, 180b, 180c may implement MIMO technology.
  • gNBs 180a, 180b may utilize beamforming to transmit signals to and/or receive signals from the WTRUs 102a, 102b, 102c.
  • WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using signals in an unlicensed band.
  • WTRUs 102a, 102b, 102c may communicate with/connect to gNBs 180a, 180b, 180c while also communicating with/connecting to another RAN such as eNode-Bs 160a, 160b, 160c.
  • WTRUs 102a, 102b, 102c may implement DC principles to communicate with one or more gNBs 180a, 180b, 180c and one or more eNode-Bs 160a, 160b, 160c substantially simultaneously.
  • Each of the gNBs 180a, 180b, 180c may be associated with a particular cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in the UL and/or DL, support of network slicing, dual connectivity, interworking between NR and E-UTRA, routing of user plane data towards user plane functions (UPFs) 184a, 184b, routing of control plane information towards access and mobility management functions (AMFs) 182a, 182b, and the like. As shown in FIG. 1D, the gNBs 180a, 180b, 180c may communicate with one another over an Xn interface.
  • UPFs user plane functions
  • AMFs access and mobility management functions
  • the AMF 182a, 182b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 113 via an N2 interface and may serve as a control node.
  • the AMF 182a, 182b may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, support for network slicing (e.g., handling of different protocol data unit (PDU) sessions with different requirements), selecting a particular SMF 183a, 183b, management of the registration area, termination of NAS signaling, mobility management, and the like.
  • PDU protocol data unit
  • Network slicing may be used by the AMF 182a, 182b, e.g., to customize CN support for WTRUs 102a, 102b, 102c based on the types of services being utilized WTRUs 102a, 102b, 102c.
  • different network slices may be established for different use cases such as services relying on ultra-reliable low latency (URLLC) access, services relying on enhanced massive mobile broadband (eMBB) access, services for MTC access, and/or the like.
  • URLLC ultra-reliable low latency
  • eMBB enhanced massive mobile broadband
  • the CN 115 may facilitate communications with other networks.
  • the CN 115 may include, or may communicate with, an IP gateway (e.g., an IP multimedia subsystem (IMS) server) that serves as an interface between the CN 115 and the PSTN 108.
  • IMS IP multimedia subsystem
  • the CN 115 may provide the WTRUs 102a, 102b, 102c with access to the other networks 112, which may include other wired and/or wireless networks that are owned and/or operated by other service providers.
  • the WTRUs 102a, 102b, 102c may be connected to a local Data Network (DN) 185a, 185b through the UPF 184a, 184b via the N3 interface to the UPF 184a, 184b and an N6 interface between the UPF 184a, 184b and the DN 185a, 185b.
  • DN local Data Network
  • one or more, or all, of the functions described herein with regard to any of: WTRUs 102a-d, base stations 114a-b, eNode-Bs 160a-c, MME 162, SGW 164, PGW 166, gNBs 180a-c, AMFs 182a-b, UPFs 184a-b, SMFs 183a-b, DNs 185a-b, and/or any other element(s)/device(s) described herein, may be performed by one or more emulation elements/devices (not shown).
  • the emulation devices may be one or more devices configured to emulate one or more, or all, of the functions described herein. For example, the emulation devices may be used to test other devices and/or to simulate network and/or WTRU functions.
  • the emulation devices may be designed to implement one or more tests of other devices in a lab environment and/or in an operator network environment.
  • the one or more emulation devices may perform the one or more, or all, functions while being fully or partially implemented and/or deployed as part of a wired and/or wireless communication network in order to test other devices within the communication network.
  • the one or more emulation devices may perform the one or more, or all, functions while being temporarily implemented/deployed as part of a wired and/or wireless communication network.
  • the emulation device may be directly coupled to another device for purposes of testing and/or may performing testing using over-the-air wireless communications.
  • the one or more emulation devices may perform the one or more, including all, functions while not being implemented/deployed as part of a wired and/or wireless communication network.
  • the emulation devices may be utilized in a testing scenario in a testing laboratory and/or a non-deployed (e.g., testing) wired and/or wireless communication network in order to implement testing of one or more components.
  • the one or more emulation devices may be test equipment. Direct RF coupling and/or wireless communications via RF circuitry (e.g., which may include one or more antennas) may be used by the emulation devices to transmit and/or receive data.
  • RF circuitry e.g., which may include one or more antennas
  • a codebook may be a set of discrete Fourier transform (DFT)-beams, codewords, basis-beams, two-dimensional (2D) basis beams, and/or 2D vectors for selection of a precoding matrix indicator (PMI).
  • DFT-beam may be a vector of complex numbers, which may additionally and/or alternatively be termed a basis-beam, codeword, and/or PMI.
  • PMI may be a set of one or more DFT-beams, basis-beams, and/or codewords.
  • CSI may also include any other measurement quantity determined by the wireless transmit/receive unit (WTRU) from the configured CSI-RS and/or SS/PBCH block.
  • WTRU wireless transmit/receive unit
  • a WTRU may report a subset of CSI components, where CSI components may correspond to at least a CRI, an SSBRI, an indication of a panel used for reception at the WTRU (e.g., a panel identity and/or a group identity), and/or measurements such as L1-RSRP and/or L1-SINR taken from SS/PBCH and/or CSI-RS (e.g., CRI-RSRP, CRI-SINR, SSB-lndex-RSRP, and/or SSB-lndex-SINR).
  • CSI components may include at least an Rl, CQI, PMI, LI, and/or any similar measurement.
  • CSI-RS channel state information reference signal
  • MIMO multi-user multiple-input multiple-output
  • the selection of a subset of CSI-RS resources and reporting CSI for a subset of CSI-RS resources may introduce additional challenges. Therefore, new and/or enhanced methods and procedures may be utilized to address selection of a subset of CSI-RS resources from a CSI-RS resource set, a determination of a CSI on the selected subset of CSI-RS resources, and/or managing and/or handling the CSI reporting for multiple CSI-RS resources.
  • a wireless transmit/receive unit may receive a CSI-RS configuration that includes indications for one or more of the following: two or more CSI-RS resources in a CSI-RS resource set and/or a target performance requirement (e.g., a target reference signal received power (RSRP) value, a target rank value, and/or a target channel quality index (CQI) value).
  • RSRP target reference signal received power
  • CQI target channel quality index
  • the WTRU may receive a plurality of CSI-RS resources and may determine and/or select a subset (e.g., one or more) of CSI-RS resources from the CSI-RS resource set.
  • a subset e.g., one or more
  • the aggregate RSRP value e.g., summation of the RSRP values
  • the CSI-RS resources in the determined subset of CSI-RS resources may be greater than or equal to a target RSRP value.
  • the aggregate CQI value (e.g., summation of the CQI values) of the CSI-RS resources in the determined subset of CSI-RS resources may be greater than or equal to a target CQI value.
  • a first CSI-RS resource may have a CQI value of 0, a second CSI-RS resource may have a CQI value of 1 , a third CSI-RS resource may have a CQI value of 2, and a fourth CSI-RS resource may have a CQI value of 3.
  • the target CQI value is 6, then the selected subset of CSI-RS resources may include only the second, third, and fourth CSI-RS resources, which may have an aggregate CQI value equal to 6.
  • the aggregate rank value (e.g., summation of the rank values) of the CSI-RS resources in the determined subset of CSI-RS resources may be greater than or equal to a target rank value.
  • a first CSI-RS resource may have a rank value of 2
  • a second CSI-RS resource may have a rank value of 3
  • a third CSI-RS resource may have a rank value of 5
  • a fourth CSI-RS resource may have a rank value of 6. If the target rank is 10, then the selected subset of CSI-RS resources may include only the third and fourth CSI-RS resources, which may have an aggregated rank value equal to 11.
  • the WTRU may determine a single CSI for all the CSI-RS resources in the determined subset of CSI-RS resources. For example, if the selected subset of CSI-RS resources includes two CSI-RS resources, the WTRU may determine a single CSI based on both CSI-RS resources in the selected subset of CSI-RS resources. In an example, the WTRU may determine one rank value, one PMI, and one CQI value based on all CSI-RS resources in the selected subset of CSI-RS resources.
  • the information may include and/or indicate one or more of the following: an indication of a single rank value for all the selected CSI-RS resources, an indication of a single CQI value for all the selected CSI-RS resources, an indication of a single PM I for all the selected CSI-RS resources, and/or an indication of a single RSRP value for all the selected CSI-RS resources.
  • the aggregate RSRP value (e.g., summation of the RSRP values) of the CSI-RS resources in the determined subset of CSI-RS resources may be greater than or equal to a target RSRP value.
  • a CSI-RS resource set may include four CSI-RS resources, where a first CSI-RS resource may have an RSRP value of 0 dB, a second CSI-RS resource may have an RSRP value of 1 dB, a third CSI-RS resource may have an RSRP value of 2 dB, and a fourth CSI-RS resource may have an RSRP value of 3 dB.
  • the selected subset of CSI-RS resources may include only the third and fourth CSI-RS resources, which may have an aggregate RSRP value equal to 5 dB.
  • the aggregate CQI value e.g., summation of the CQI values
  • the aggregate CQI value may be greater than or equal to a target CQI value.
  • the determined subset may include a minimum number of CSI-RS resources that may achieve the maximum aggregated RSRP value, the maximum aggregated CQI value, and/or the maximum aggregated rank value that may be greater than or equal to a target RSRP value, a target CQI value, and/or a target rank value.
  • a first CSI-RS resource may have a rank value of 2
  • a second CSI-RS resource may have a rank value of 3
  • a third CSI-RS resource may have a rank value of 4
  • a fourth CSI-RS resource may have a rank value of 5. If the target rank is 7, then the selected subset of CSI-RS resources may include only the third and fourth CSI-RS resources, which may have an aggregated rank value equal to 9.
  • a first CSI-RS resource may have a CQI value of 2
  • a second CSI-RS resource may have a CQI value of 3
  • a third CSI-RS resource may have a CQI value of 4
  • a fourth CSI-RS resource may have a CQI value of 5. If the target CQI value is 2, then the selected subset of CSI-RS resources may include only the fourth CSI-RS resource, which may have a CQI value equal to 5.
  • a first CSI-RS resource may have an RSRP value of 2 dB
  • a second CSI-RS resource may have an RSRP value of 3 dB
  • a third CSI-RS resource may have an RSRP value of 4 dB
  • a fourth CSI-RS resource may have an RSRP value of 5 dB. If the target RSRP is 2 dB, then the selected subset of CSI-RS resources may include only the fourth CSI-RS resource, which may have an RSRP value equal to 5 dB.
  • the WTRU may determine (e.g., select) one or more CSI-RS resources based on one or more of an RSRP threshold and/or an RSRP offset, a rank threshold and/or a rank offset, and/or a CQI threshold and/or a CQI offset associated with a CSI-RS resource in the CSI-RS resource set.
  • the WTRU may determine (e.g., select) one or more CSI-RS resources for CSI determination based on the allocated uplink resources for CSI reporting.
  • the WTRU may select one or more CSI-RS resources for CSI determination that results in a maximum aggregated rank (e.g., the rank summed across all the selected CSI-RS resources), a maximum aggregated CQI (e.g., the CQI summed across all the selected CSI-RS resources), and/or a maximum aggregated rank and a maximum aggregated CQI under the constraint that the resulting CSI payload may fit into the allocated uplink resources for CSI reporting.
  • a maximum aggregated rank e.g., the rank summed across all the selected CSI-RS resources
  • a maximum aggregated CQI e.g., the CQI summed across all the selected CSI-RS resources
  • a maximum aggregated rank and a maximum aggregated CQI under the constraint that the resulting CSI payload may fit into the allocated uplink resources for CSI reporting.
  • a WTRU may determine CSI for the selected subset of CSI-RS resources.
  • the WTRU may determine a Class-A CSI and/or a Class-B CSI for the determined (e.g., selected) CSI-RS resources.
  • the WTRU may determine a respective CSI for each of the determined (e.g., selected) CSI-RS resources. For example, the WTRU may determine a first CSI for a first selected CSI-RS resource and a second CSI for a second selected CSI-RS resource. For example, the WTRU may determine a respective rank value, a respective PM I, and/or a respective CQI value for each of the selected CSI-RS resources.
  • the WTRU may determine a single CSI for all the determined (e.g., selected) CSI-RS resources. For example, the WTRU may determine a single CSI for a first and a second selected CSI-RS resource. For example, the WTRU may determine a rank value, a PMI, and/or a CQI value for all selected CSI-RS resources.
  • a WTRU may apply one or more CSI inclusion or omission rules.
  • the WTRU may assign a priority value to the determined Class-A CSI and may use the assigned priority value to determine whether to include the Class-A CSI in the CSI report.
  • the priority values may be assigned based on one or more of the following criteria.
  • the priority value assigned to a CSI associated with a CSI-RS resource may be based on the RSRP of the CRI.
  • a CSI associated with a CSI-RS resource having the highest RSRP may have the highest priority, while a CSI associated with a CSI-RS resource having the smallest RSRP may have the smallest priority.
  • the priority value assigned to a CSI associated with a CSI-RS resource may also be based on the CQI of the associated CSI-RS resource.
  • a CSI associated with a CSI-RS resource having the highest CQI may have the highest priority, while a CSI associated with a CSI-RS resource having the smallest CQI may have the smallest priority.
  • the priority value assigned to a CSI associated with a CSI-RS resource may be based on rank, RSRP and rank, RSRP and CQI, rank and CQI, or RSRP, rank, and CQI of the CSI-RS resource.
  • a CSI associated with a CSI-RS resource having the highest rank may have the highest priority, while a CSI associated with a CSI-RS resource having the smallest rank may have the smallest priority.
  • a CSI associated with a CSI-RS resource having the highest rank and CQI may have the highest priority, while a CSI associated with a CSI-RS resource having the smallest rank and CQI may have the smallest priority.
  • the WTRU may assign a priority value to each CSI-RS resource based on RSRP, rank, CQI, RSRP and rank, RSRP and CQI, rank and CQI, or RSRP, rank, and CQI, and may redetermine the Class-B CSI on a subset of the high-priority CSI-RS resources with a resulting Class-B CSI payload size that may fit in the uplink resources.
  • the WTRU may assign a high priority to the CSI-RS resources with the highest RSRP and a low priority to the CSI-RS resources with the smallest RSRP, and may re-determine the Class-B CSI on a subset of the high-priority CSI-RS resources such that the resulting Class-B CSI payload size may fit in the uplink resources.
  • a WTRU may implement one or more CSI reporting priorities.
  • the WTRU may assign a priority value to the Class-A and/or Class-B CSI report to prioritize or de-prioritize it over another CSI report.
  • the priority value assigned to the CSI report may be based on one or more of the following criteria.
  • the priority value assigned to the CSI report may be based on the number of CSI-RS resources in the CSI resource set.
  • a CSI-RS resource selection-based CSI report determined based on a larger number of total CSI-RS resources may be prioritized over a CSI-RS resource selection-based CSI report determined based on a smaller number of total CSI-RS resources.
  • a CSI-RS resource selection-based CSI report determined based on a larger number of selected CRIs may be prioritized over a CSI-RS resource selection-based CSI report determined based on a smaller number of selected CSI-RS resources.
  • the priority value assigned to the CSI report may also be based on the report type.
  • An aperiodic CSI-RS resource selection-based CSI report may be prioritized over a semi-persistent and/or periodic CSI- RS resource sei ection -based CSI report.
  • a semi-persistent CSI-RS resource selection-based CSI report may be prioritized over a periodic CSI-RS resource selection-based CSI report.
  • An aperiodic single CSI-RS resource selection-based CSI report may be prioritized over a periodic CSI-RS resource selection-based CSI report.
  • a WTRU may report CSI (e.g., to a base station).
  • a WTRU may send a CSI report including an indication indicating the selected CSI-RS resource(s).
  • the CSI report may include a Class-A CSI and/or a Class-B CSI.
  • the Class-A CSI may include one or more of an indication of the rank value for each of the selected CSI-RS resource(s), an indication of the CQI value for each of the selected CSI-RS resource(s), an indication of the precoding matrix indicator (PM I) for each of the selected CSI-RS resource(s), and/or an indication of the RSRP value for each of the selected CSI-RS resource(s).
  • an indication of the rank value for each of the selected CSI-RS resource(s) an indication of the CQI value for each of the selected CSI-RS resource(s)
  • PM I precoding matrix indicator
  • a WTRU may perform any combination of methods and/or procedures for performing CSI reporting and/or CSI-RS resources selection.
  • a WTRU may receive a semi-static or dynamic CSI-RS configuration for reporting CSI.
  • the CSI-RS configuration may be received via radio resource control (RRC) signaling, medium access control - control element (MAC-CE), and/or downlink control information (DCI).
  • RRC radio resource control
  • MAC-CE medium access control - control element
  • DCI downlink control information
  • the CSI reference resource may include an indication of the number of CSI-RS resources in a CSI-RS resource set and may also include a number of CSI-RS resource sets.
  • the CSI-RS configuration may further include a CSI-RS resource selection method or CSI-RS resource selection criteria, such as Type-A, Type-B, and/or Type-C Differences between Type-A, Type-B, and Type-C CSI-RS resource selection may be discussed herein.
  • the CSI-RS configuration may further include one or more indications for Class-A and/or Class-B CSI. Class-A and/or Class-B CSI may be determined based on the selected CSI-RS resources in the CSI-RS resource set, and differences between Class-A and Class-B CSI may be discussed herein.
  • the WTRU may also be dynamically configured for Class-A and/or Class- B CSI via MAC-CE and/or DCI.
  • the WTRU may receive CSI-RS resources for determination of Class-A and/or Class-B CSI.
  • the WTRU may first select a subset of the received CSI-RS resources in the CSI-RS resource set and may then determine Class-A and/or Class-B CSI based on the selected subset of CSI-RS resources.
  • the selected subset of CSI-RS resources may include one or more CSI-RS resources from the CSI-RS resource set.
  • a WTRU may select CSI-RS resources.
  • the Type-A, Type-B, and Type-C CSI-RS resource selection methods may be explained with examples.
  • the WTRU may receive a target performance metric.
  • the WTRU may receive a target reference signal received power (RSRP), a target rank, a target channel quality indicator (CQI), a target RSRP and a target rank, a target RSRP and a target CQI, a target rank and a target CQI, or a target RSRP, a target rank, and a target CQI.
  • RSRP target reference signal received power
  • CQI channel quality indicator
  • the WTRU may receive a target RSRP equal to 5dB.
  • the WTRU may receive a target rank equal to 7.
  • the WTRU may receive a target CQI equal to the CQI index 10 (e.g,, index 10 in Table 5.2.2.1-2 of 3GPP TS 38.214 Release 17 (e.g., v17.8.0)).
  • the WTRU may receive a target RSRP equal to 5dB and a target rank equal to 7.
  • the WTRU may receive one or more CSI-RS resources in the configured CSI-RS resource set.
  • the WTRU may determine a performance-defining metric (e.g., RSRP, rank, and/or CQI) for one or more CSI-RS resources in the CSI-RS resource set.
  • the WTRU may determine or select a subset of the CSI-RS resources in the CSI-RS resource set based on a configured, indicated, and/or fixed target performance metric (e.g., target rank) and based on an aggregated performance-defining metric across one or more CSI-RS resources (e.g., aggregated rank across one or more CSI-RS resources) in the CSI-RS resource set.
  • a performance-defining metric e.g., RSRP, rank, and/or CQI
  • a WTRU may be configured for a target reference signal received power (RSRP) equal to 5dB.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the WTRU may measure the RSRP of each CSI-RS resource.
  • the first, second, third, and/or fourth CSI-RS resources in the CSI-RS resource set may have RSRP values equal to OdB, 1 dB, 2dB, and 3dB, respectively.
  • the aggregated RSRP across the first and second CSI-RS resources in the CSI-RS resource set may be 3.5dB.
  • the aggregated RSRP across the second and third CSI-RS resources in the CSI-RS resource set may be 4.5dB
  • the aggregated RSRP across the third and fourth CSI-RS resources in the CSI-RS resource set may be 6.8dB.
  • the aggregated RSRP across the first, second, and third CSI-RS resources in the CSI-RS resource set may be 5.8dB.
  • the aggregated RSRP across the second, third, and fourth CSI-RS resources in the CSI-RS resource set may be 6.8dB.
  • the aggregated RSRP across the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set may be 7 ,6dB.
  • All the subsets including the subset of the third and fourth CSI-RS resources, the subset of the first, second, and third CSI-RS resources, the subset of the second, third, and fourth CSI-RS resources, and the subset of the first, second, third, and fourth CSI-RS resources, may achieve the target RSRP value of 5dB.
  • the WTRU may determine the minimum number of CSI-RS resources in the CSI-RS resource set that results in the maximum aggregated RSRP value greater than or equal to the target RSRP.
  • the determined or selected subset of CSI-RS resources in the CSI-RS resource set in this example may be the subset including the third and fourth CSI-RS resources in the CSI-RS resource set.
  • a WTRU may be configured for a target rank value equal to 10.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the WTRU may measure the rank of each CSI-RS resource.
  • the first, second, third, and/or fourth CSI-RS resources in the CSI-RS resource set may have rank values equal to 2, 3, 5, and 6, respectively.
  • the aggregated rank across the first and second CSI-RS resources in the CSI-RS resource set may be 5.
  • the aggregated rank across the second and third CSI-RS resources in the CSI-RS resource set may be 7.
  • the aggregated rank across the third and fourth CSI-RS resources in the CSI-RS resource set may be 11 .
  • the aggregated rank across the first, second, and third CSI-RS resources in the CSI-RS resource set may be 10.
  • the aggregated rank across the second, third, and fourth CSI-RS resources in the CSI-RS resource set may be 14.
  • the aggregated rank across the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set may be 16.
  • All the subsets including the subset of the third and fourth CSI-RS resources, the subset of the first, second, and third CSI-RS resources, the subset of the second, third, and fourth CSI-RS resources, and the subset of the first, second, third, and fourth CSI-RS resources, may achieve the target rank value (e.g., 10).
  • the WTRU may determine the minimum number of CSI-RS resources in the CSI-RS resource set that results in the maximum aggregated rank value greater than or equal to the target rank value.
  • the determined or selected subset of CSI-RS resources in the CSI-RS resource set in this example may be the subset including the third and fourth CSI-RS resources in the CSI-RS resource set.
  • a WTRU may be configured for a target channel quality indicator (CQI) value (e.g., 6).
  • the CSI- RS resource set may include four CSI-RS resources.
  • the WTRU may measure the CQI of each CSI-RS resource.
  • the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set may have CQI values equal to 1, 2, 3, and 4, respectively.
  • the aggregated CQI across the first and second CSI-RS resources in the CSI-RS resource set may be 3.
  • CSI-RS resources in the CSI-RS resource set may be 5.
  • All the above-mentioned subsets may achieve the target CQI value (e.g., 6).
  • the WTRU may determine the minimum number of CSI-RS resources in the CSI-RS resource set that results in the maximum aggregated CQI value greater than or equal to the target CQI value.
  • the determined or selected subset of CSI-RS resources in the CSI-RS resource set in this example may be the subset including the third and fourth CSI-RS resources in the CSI-RS resource set.
  • a WTRU may semi-statically or dynamically (e.g., by radio resource control (RRC), medium access control - control element (MAC-CE), and/or downlink control information (DCI)) receive a maximum and/or a minimum number indicating the maximum and/or minimum number of CSI-RS resources in a subset of CSI-RS resources to be determined (e.g., selected) from the CSI-RS resource set based on the configured target performance-defining metric (e.g., target rank and/or target CQI).
  • the WTRU may determine a subset of CSI-RS resources, where the number of CSI-RS resources in the subset does not exceed the configured maximum number of CSI-RS resources in the subset.
  • the WTRU may determine a subset of CSI-RS resources, where the number of CSI-RS resources is equal to or greater than the configured minimum number of CSI-RS resources in the subset.
  • a WTRU may adjust the configured, indicated, or fixed maximum and/or minimum number of CSI- RS resources in a subset of CSI-RS resources based on one or more factors.
  • the WTRU may reduce the maximum number of CSI-RS resources when a smaller number of CSI-RS resources may achieve the target performance-defining metric (e.g., target rank).
  • the WTRU may send an indication in a CSI report to indicate the maximum number of CSI-RS resources needed in a subset to achieve the target performancedefining metric (e.g., target rank).
  • the WTRU may further reduce the minimum number of CSI-RS resources when the available uplink resources for CSI reporting are not sufficient to report a CSI.
  • the WTRU may send an indication in a CSI report to indicate the minimum number of CSI-RS resources needed in a subset to achieve the target performance-defining metric (e.g., target rank).
  • the WTRU may send an indication to reduce the target performance-defining metric (e.g., target rank) if the configured number of CSI-RS resources in the set and/or if the maximum number of allowed CSI-RS resources in a subset of CSI-RS resources is not sufficient to achieve the target rank performance.
  • the WTRU may send an indication in the CSI report to indicate that the target rank cannot be achieved.
  • the WTRU may send an indication in the CSI report to indicate the maximum rank that can be achieved using the configured maximum and the minimum number of allowed CSI-RS resources in the CSI-RS resource set.
  • the subset index may be selected based on one or more of the following.
  • the subset may be selected based on the smallest or highest index.
  • the subset may be selected based on the CSI-RS resources achieving the maximum performance-defining metric (e.g., the subset with the highest rank, CQI, and/or RSRP values).
  • the subset may be selected based on the smallest number of CSI-RS resources.
  • the subset may be selected based on a number of CSI-RS resources that can fully fit into the available uplink resources for CSI reporting.
  • the subset may be selected based on including CSI- RS resources with the smallest or largest indices.
  • the WTRU may be semi-statically or dynamically (e.g., by RRC, MAC-CE, and/or DCI) configured for a performance-defining threshold (e.g., rank threshold) for one or more CSI-RS resources in the CSI-RS resource set.
  • a performance-defining threshold e.g., rank threshold
  • the WTRU may receive an RSRP threshold, a rank threshold, a CQI threshold, an RSRP threshold and a rank threshold, an RSRP threshold and a CQI threshold, a rank threshold and a CQI threshold, or an RSRP threshold, a rank threshold, and a CQI threshold.
  • the WTRU may receive an RSRP threshold equal to 5dB.
  • the WTRU may receive a rank threshold equal to 7.
  • the WTRU may receive a CQI threshold equal to the CQI index 10 (e.g., index 10 in Table 5.2.2.1-2 of 3GPP TS 38.214 Release 17 (e.g., V17.8.0)).
  • the WTRU may receive an RSRP threshold equal to 5dB and a target threshold equal to 7.
  • the WTRU may receive a performance-defining threshold (e.g., rank threshold) applicable to one or more CSI-RS resources in a CSI-RS resource set.
  • the WTRU may determine whether to include or not to include (e.g., whether to select or not to select) a CSI-RS resource in a subset of CSI-RS resources based on the performance-defining threshold (e.g., rank threshold).
  • the WTRU may include the CSI-RS resource in the subset of CSI-RS resources.
  • the WTRU may include the CSI-RS resource in the subset of CSI-RS resources.
  • the WTRU may include the CSI-RS resource in the subset of CSI-RS resources.
  • the WTRU may determine whether to include or not to include (e.g., whether to select or not to select) CSI-RS resources in a subset of CSI-RS resources based on the performance-defining (e.g., rank) threshold value and based on the performance-defining (e.g., rank) offset value.
  • the performance-defining e.g., rank
  • the performance-defining e.g., rank
  • the WTRU may include a CSI-RS resource in the subset of CSI-RS resources when its measured, determined, or actual RSRP value is greater than or equal to the configured RSRP threshold minus the configured RSRP offset (e.g., a CSI-RS resource with a measured, determined, or actual RSRP value greater than or equal to -0.3dB may be included in the subset of CSI-RS resources).
  • a CSI-RS resource in the subset of CSI-RS resources when its measured, determined, or actual RSRP value is greater than or equal to the configured RSRP threshold minus the configured RSRP offset (e.g., a CSI-RS resource with a measured, determined, or actual RSRP value greater than or equal to -0.3dB may be included in the subset of CSI-RS resources).
  • the subset of CSI-RS resources may have a fixed number of CSI-RS resources equal to two.
  • the CSI-RS resource selection for determination of the subset of CSI-RS resources may be based on the maximum number of CSI-RS resources that may be included in the subset of CSI-RS resources, the minimum number of CSI-RS resources that may be included in the subset of CSI-RS resources, a fixed number of CSI-RS resources in the subset of CSI-RS resources, the configured, indicated, or fixed performance-defining (e.g., rank, CQI, and/or RSRP) threshold, and/or the configured, indicated, or fixed performance-defining (e.g., rank, CQI, and/or RSRP) offset values.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the maximum and minimum number of CSI-RS resources that may be included in the subset of CSI-RS resources may be three and two CSI-RS resources, respectively.
  • the rank threshold and the rank offset values may be four and one, respectively.
  • the rank threshold and the rank offset may be associated with all CSI-RS resources.
  • the WTRU may determine the rank of each CSI-RS resource, which may be equal to 1 , 2, 5, and 7 for the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set, respectively. Based on the rank threshold and the rank offset, the subset of CSI-RS resources may include the third and the fourth CSI-RS resources.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the subset of CSI-RS resources may have a fixed number of CSI-RS resources equal to two.
  • the rank threshold and the rank offset values may be four and one, respectively.
  • the rank threshold and the rank offset may be associated with all CSI- RS resources.
  • the WTRU may determine the rank of each CSI-RS resource, which may be equal to 1 , 2, 0, and 3 for the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set, respectively.
  • the subset of CSI-RS resources may include the second and the fourth CSI-RS resources.
  • the performance-defining offset value is equal to zero or is absent, the subset of CSI-RS resource selection may be based on the performance-defining threshold value.
  • the WTRU may determine a subset of CSI-RS resources from the CSI-RS resource set using the Type-A, Type-B, or Type-C subset selection methods. Based on the subset of CSI-RS resources, the WTRU may determine a CSI. The WTRU may determine a Class-A CSI report or a Class-B CSI report. [0166] The WTRU may determine a CSI for each of the CSI-RS resources in the determined (e.g., selected) subset of CSI-RS resources, for instance, for a Class A CSI report.
  • the WTRU may determine a CSI (e.g., a CQI, a PMI, and/or a rank) for each CSI-RS resource in the CSI-RS resource set.
  • the CSI-RS resource set may include four CSI-RS resources, and the selected subset of CSI-RS resources may include two CSI-RS resources (e.g., the first CSI-RS resource and the second CSI-RS resource).
  • Each CSI-RS resource in the CSI-RS resource set may have the same or a different number of CSI-RS antenna ports. All CSI-RS resources may have the same number of CSI-RS antenna ports.
  • the first and second CSI-RS resources may have an equal number of antenna ports (e.g., the number of antenna ports in the first CSI-RS resource may be N_1 , and the number of antenna ports in the second CSI-RS resource may also be N_1).
  • the third and fourth CSI-RS resources may have an equal number of antenna ports (e.g., the number of antenna ports in the third CSI-RS resource may be N_2, and the number of antenna ports in the fourth CSI-RS resource may also be N_2).
  • the number of antenna ports in the first CSI-RS resource may be different from the number of antenna ports in the fourth CSI-RS resource (e.g., N_1 may not be equal to N_2).
  • the WTRU may use the same codebook for CSI determination (e.g., for PMI determination) on CSI-RS resources with the same number of CSI-RS antenna ports.
  • the first and second CSI-RS resources may have an equal number of antenna ports (e.g., the number of antenna ports in the first CSI-RS resource may be N_1 , and the number of antenna ports in the second CSI-RS resource may also be N_1 ).
  • the third and fourth CSI-RS resources may have an equal number of antenna ports (e.g .
  • the number of antenna ports in the third CSI-RS resource may be N_2
  • the number of antenna ports in the fourth CSI-RS resource may also be N_2)
  • the number of antenna ports in the first CSI-RS resource may be different from the number of antenna ports in the fourth CSI-RS resource (e.g., N_1 may not be equal to N_2).
  • the WTRU may use a first codebook for a first and second CSI determination based on the first and second CSI-RS resources and a second codebook for a third and fourth CSI determination based on the third and fourth CSI-RS resources.
  • the WTRU may determine a single CSI (e.g., a single PM I, a single CQI value, and/or a single rank value) based on all the CSI-RS resources in the CSI-RS resource set and/or based on all the CSI-RS resources in the determined (e.g., selected) subset of CSI-RS resources, for instance, for a Class B CSI report.
  • the CSI-RS resource set may include four CSI-RS resources.
  • Each CSI-RS resource may have thirty-two CSI-RS antenna ports.
  • the CSI-RS resource set may include four CSI-RS resources. Each CSI-RS resource may have thirty-two CSI-RS antenna ports. All the CSI-RS resources may have a total of one hundred and twentyeight CSI-RS antenna ports (e.g., the first CSI-RS resource may have CSI-RS antenna ports one to thirty- two, the second CSI-RS resource may have CSI-RS antenna ports thirty-three to sixty-four, and so on).
  • the selected subset of CSI-RS resources may include two CSI-RS resources (e.g., the first CSI-RS resource and the third CSI-RS resource of the CSI-RS resource set).
  • the subset of CSI-RS resources may have sixty-four antenna ports (e.g., the thirty-two CSI-RS antenna ports associated with the first CSI-RS resource of the CSI-RS resource set and the thirty-two CSI-RS antenna ports associated with the third CSI- RS resource of the CSI-RS resource set).
  • the WTRU may determine a single PMI with a PMI dimension equal to sixty-four from a single codebook with a codebook dimension proportional to sixty-four CSI-RS antenna ports.
  • the WTRU and/or the network may support CSI omission and CSI inclusion rules to establish a common understanding between the network (e.g., gNB or base station) and the WTRU regarding the reported CSI contents, particularly in cases where the uplink time and/or frequency-domain resources for CSI reporting are insufficient, and the WTRU may need to drop or prioritize certain CSI elements (e.g., CQI, rank, co-phasing coefficients) to comply with the network on the allocated uplink resources for CSI reporting.
  • the WTRU may determine a CSI, and the CSI payload size may be larger than the uplink resources allocated by the network for CSI reporting.
  • the WTRU may be required to drop certain CSI elements and prioritize others for reporting.
  • the WTRU and/or the network may facilitate dropping and prioritizing through CSI omission rules.
  • two types of CSI broadly classified as Type-I and Type-ll CSI may be supported.
  • the existing CSI omission rules may be designed and specified only for Type-ll CSI, as it may result in a larger CSI payload size, thereby necessitating rules to manage the payload size of Type-ll CSI.
  • the WTRU may be configured with CSI reporting prioritization for Class-A CSI.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the WTRU may determine a CSI for each CSI-RS resource and report all the CSIs in a single CSI report.
  • the CSI-RS resource set may include four CSI-RS resources, and the WTRU may determine a CSI for each CSI-RS resource and report each CSI in four different CSI reports.
  • the CSI-RS resource set may include four CSI-RS resources, and the selected subset of CSI-RS resources may include two CSI-RS resources.
  • the WTRU may determine a CSI for each of the two CSI- RS resources in the selected subset of CSI-RS resources and report the two CSIs in a single CSI report.
  • the CSI-RS resource set may include four CSI-RS resources, and the selected subset of CSI-RS resources may include two CSI-RS resources.
  • the WTRU may determine a CSI for each of the two CSI- RS resources in the selected subset of CSI-RS resources and report the two CSIs in two different CSI reports.
  • the CSI-RS resource set may include four CSI-RS resources.
  • the first, second, third, and fourth CSI-RS resources in the CSI-RS resource set may have RSRP values equal to 4dB, 2dB, OdB, and 5dB, respectively.
  • the first, second, third, and fourth CSI-RS resources may be associated with the first, second, third, and fourth CSIs, respectively.
  • the WTRU may assign the highest priority to the fourth CSI, the second highest priority to the first CSI, the third highest priority to the second CSI, and the fourth highest priority to the third CSI.
  • the WTRU may report only the fourth CSI.
  • the WTRU may report only the fourth and first CSIs.
  • the WTRU may prioritize and/or de- prioritize the CSI associated with a CSI-RS resource based on the CQI value, the rank value, and/or the RSRP value of the CSI-RS resource.
  • the different CSI contents of the prioritized CSI may further be prioritized and/or de-prioritized based on the CSI omission rules (e.g., 5G NR CSI omission rules).
  • the WTRU may prioritize reporting the wideband CQI value of the high-priority CSI-RS resource over the sub-band CQI values of the high-priority CSI-RS resource.
  • the WTRU may prioritize reporting the sub-band CQIs of the high-priority CSI-RS resource over the rank of the low-priority CSI-RS resource.
  • different CSI contents of a CSI associated with one CSI-RS resource may also be prioritized over different CSI contents of a CSI associated with another CSI-RS resource (e.g., rank, PMI, and/or CQI of a second CSI-RS resource) when all the CSIs are placed in a single CSI report and/or the CSIs are placed in different CSI reports.
  • a single CSI report may include all CSI.
  • the CSI report may have two or more parts, groups, portions, and/or partitions.
  • a first portion may contain indices of the CSI-RS resources in the subset of CSI- RS resources, rank values of the CSI-RS resources in the subset of CSI-RS resources, and wideband CQI values equal in number to the number of CSI-RS resources in the subset of CSI-RS resources and associated with the CSI-RS resources in the subset of CSI-RS resources.
  • a second portion may contain a wideband single PMI associated with the CSI-RS resources in the subset of CSI-RS resources and/or a number of wideband PMIs equal in number to the number of CSI- RS resources in the subset of CSI-RS resources and associated with the CSI-RS resources in the subset of CSI-RS resources (e.g . , two PMIs for two CSI-RS resources in the selected subset of CSI-RS resources).
  • a fourth portion may contain subband CQIs associated with the CSI-RS resources in the subset of CSI-RS resources and/or a number of subband CQIs equal in number to the number of CSI-RS resources in the subset of CSI-RS resources and associated with the CSI-RS resources in the subset of CSI-RS resources (e.g., two subband CQIs associated with the CSI-RS resources in the selected subset of CSI-RS resources).
  • the WTRU may prioritize the first portion over the second, third, and fourth portions.
  • the WTRU may prioritize the second portion over the third and fourth portions.
  • the WTRU may prioritize the third portion over the fourth portion.
  • the CSIs associated with the CSI-RS resources may be prioritized based on a configured, indicated, and/or fixed rule.
  • the CSI associated with the odd-numbered CSI-RS resources in the CSI-RS resource set may be prioritized over the CSI associated with the even-numbered CSI-RS resources in the CSI-RS resource set.
  • the CSI associated with the odd-numbered CSI-RS resources in the selected subset of CSI-RS resources may be prioritized over the CSI associated with the even-numbered CSI-RS resources in the selected subset of CSI-RS resources.
  • the CSI associated with the odd-numbered CSI-RS resources in the CSI-RS resource set may be prioritized over the CSI associated with the even-numbered CSI-RS resources in the CSI-RS resource set.
  • the CSI associated with the even-numbered CSI- RS resources in the CSI-RS resource set may be prioritized over the CSI associated with the odd- numbered CSI-RS resources in the CSI-RS resource set.
  • the WTRU may implement CSI reporting priority.
  • the network e.g., a gNB or base station
  • the network may allocate uplink resources for CSI reporting.
  • the network such as a gNB, may also configure CSI reporting.
  • the network may configure more than one CSI report, and the allocated time and frequency resources for the CSI reporting may collide and/or overlap in one or more time and/or frequency domain resources.
  • the network may configure two CSI reports in different bandwidth parts, and the uplink resources for reporting of the two CSI reports may collide and/or overlap in one or more time and/or frequency domain resources (e.g. , in one or more OFDM sub-carriers).
  • the WTRU may follow some CSI reporting priority rules to select and report one of the CSI reports and drop the remaining reports.
  • the CSI reporting rules may be designed for CSIs that are determined on a single CSI-RS resource in the CSI-RS resource set and/or when the CSI-RS resource set has only one CSI-RS resource.
  • the CSI reporting priority rules may fall short and may require enhancements.
  • a semi-persistent CSI report determined based on a first CSI-RS resource set with more than one CSI-RS resource may be prioritized over a periodic CSI report determined based on a second CSI-RS resource set with more than one CSI-RS resource.
  • the priority value to a CSI report may be assigned based on the codebook type (e.g., the so- called Type-1 codebook and/or the so-called Type-ll codebook used for CSI determination) used for determination of the CSI report. For example, a first CSI determined using a first codebook (e.g., Type-ll codebook) may be prioritized over a second CSI determined using a second codebook (e.g., Type-1 codebook). The priority value to a CSI report may be assigned based on the codebook parameters used for determination of the CSI.
  • the codebook type e.g., the so- called Type-1 codebook and/or the so-called Type-ll codebook used for CSI determination
  • a first CSI determined using a first codebook e.g., Type-ll codebook
  • a second codebook e.g., Type-1 codebook
  • a first CSI determined using a larger DFT-oversampling value may be prioritized over a second CSI determined using a smaller DFT-oversampling value.
  • a first CSI determined for a larger number of DFT-beams may be prioritized over a second CSI determined for a smaller number of DFT-beams.
  • a first CSI that includes sub-band level CSI information may be prioritized over a second CSI without any subband level CSI information.
  • a first CSI determined using a first codebook mode (e.g., the so-called Type-1 codebook mode-2) may be prioritized over a second CSI determined using a second codebook mode (e.g., the so-called Type-1 codebook mode-2).
  • the priority value to a CSI report may be assigned based on the number of antenna panels (e.g., at the network side, at the WTRU side, and/or both at the network and at the WTRU side) used for determination of the CSI report. For example, a first CSI report determined for a larger number of antenna panels may be prioritized over a second CSI report determined for a smaller number of antenna panels.
  • the priority value to a CSI report may be assigned based on the performance-defining metrics (e.g., RSRP, CQI, and/or rank).
  • a first CSI report with an RSRP value (e.g., an aggregated RSRP value and/or the RSRP of a single CSI-RS resource) equal to 1 dB may be prioritized over a second CSI report with an RSRP value (e.g., an aggregated RSRP value and/or just the RSRP of a single CSI-RS resource) equal to OdB.
  • an RSRP value e.g., an aggregated RSRP value and/or the RSRP of a single CSI-RS resource
  • a first CSI report with a CQI value (e.g., an aggregated CQI value and/or the CQI of a single CSI-RS resource) equal to 1 may be prioritized over a second CSI report with a CQI value (e.g., an aggregated CQI value and/or the CQI of a single CSI-RS resource) equal to OdB.
  • a first CSI report with a rank value (e.g., an aggregated rank value and/or the rank of a single CSI-RS resource) equal to 4 may be prioritized over a second CSI report with a rank value (e.g., an aggregated rank value and/or the rank of a single CSI-RS resource) equal to 3.
  • the priority value to a CSI report may be assigned based on the payload size of the CSI report. For example, a first CSI report with a payload size equal to 100 bits, where 90 bits are related to the actual CSI and the remaining 10 bits are zero-padded bits, may be prioritized over a second CSI report with a payload size equal to 100 bits, where 80 bits are related to the actual CSI report and the remaining 20 bits are zero-padded bits.
  • the priority value to a CSI report may be assigned based on the number of subbands. For example, a first CSI report determined for a larger number of subbands may be prioritized over a second CSI report determined for a smaller number of subbands.
  • the priority value to a CSI report may be assigned based on the latency class associated with the CSI report. For example, a first CSI report with a higher latency restriction may be prioritized over a second CSI report with a looser latency restriction.
  • a priority value may be assigned to each CSI associated with a CSI-RS resource. For example, a CSI-RS resource set may have four CSI-RS resources.
  • the WTRU may determine four CSIs, where each CSI may be associated with a single CSI-RS resource in the CSI-RS resource set.
  • the CSI-RS resource set may have four CSI-RS resources.
  • the WTRU may determine a subset of CSI-RS resources, where the subset may include two CSI-RS resources.
  • the WTRU may determine two CSIs, where each CSI may be associated with a single CSI-RS resource in the subset of CSI-RS resources.
  • the priority values to each CSI may be assigned based on the number of antenna ports in the CSI-RS resource. For example, a first CSI-RS resource in the CSI-RS resource set may have a larger number of antenna ports compared to a second CSI-RS resource in the CSI-RS resource set. As compared to the priority value assigned to the second CSI associated with the second CSI-RS resource in the CSI-RS resource set, the WTRU may assign a higher priority to the CSI associated with the first CSI-RS resource in the CSI-RS resource set.
  • the priority values to each CSI may be assigned based on the performancedefining metrics (e.g., CQI, rank, and/or RSRP) of the associated CSI-RS resource in the CSI-RS resource set.
  • a first CSI associated with a first CSI-RS resource in the CSI-RS resource set may have a higher CQI value compared to a second CSI associated with a second CSI-RS resource in the CSI-RS resource set.
  • the WTRU may assign a higher priority to the CSI associated with the first CSI- RS resource in the CSI-RS resource set.
  • a first CSI associated with a first CSI-RS resource in the CSI-RS resource set may have a higher rank value compared to a second CSI associated with a second CSI-RS resource in the CSI-RS resource set.
  • the WTRU may assign a higher priority to the CSI associated with the first CSI-RS resource in the CSI-RS resource set.
  • a first CSI associated with a first CSI-RS resource in the CSI-RS resource set may have a higher RSRP value compared to a second CSI associated with a second CSI-RS resource in the CSI-RS resource set.
  • the WTRU may assign a higher priority to the CSI associated with the first CSI- RS resource in the CSI-RS resource set.
  • the priority values to each CSI may be assigned based on the codebook types used to determine the CSI, based on the payload size of the CSI, based on the codebook parameters used for determination of the CSI, and based on the latency class of the CSI, as covered earlier with examples.
  • the WTRU may send the CSI report in uplink resources allocated by the network, where the priority of CSI reporting may be as discussed earlier. For example, a high-priority CSI report may be reported, and a low-priority CSI report may be dropped and/or left for later transmission.
  • one or more indications may be used.
  • An indication may indicate a rank value for each of the CSI-RS resources in the selected subset of CSI-RS resources.
  • An indication may indicate a CQI value (e.g., for a wideband CQI and for subband CQI(s)) associated with each of the CSI-RS resources in the selected subset of CSI-RS resources.
  • An indication may indicate a PMI for each of the CSI-RS resources in the selected subset of CSI-RS resources.
  • An indication may indicate an RSRP value for each of the CSI-RS resources in the selected subset of CSI-RS resources.
  • An indication may indicate a single aggregated rank value for all the selected CSI-RS resources.
  • An indication may indicate a single aggregated CQI (e.g., wideband CQI(s) and/or subband CQI(s)) value for all the selected CSI-RS resources.
  • An indication may indicate a single aggregated PMI (e.g., a single PMI for all the ports in the selected CSI-RS resources) for all the selected CSI-RS resources.
  • An indication may indicate a single aggregated RSRP value for all the selected CSI-RS resources.
  • FIG. 2 an example procedure 200 that may be performed by a WTRU for channel state information (CSI) reporting for hybrid beamforming performed by a WTRU is illustratively depicted.
  • CSI channel state information
  • a WTRU may receive configuration information indicating one or more of a plurality of channel state information reference signal (CSI-RS) resources in a CSI-RS resource set or a target performance requirement.
  • the configuration information may be provided via radio resource control (RRC) signaling, a medium access control-control element (MAC-CE), or downlink control information (DCI) and may include an indication of a CSI-RS resource selection criterion based on one or more of a target reference signal received power (RSRP) value, a target rank value, or a target channel quality indicator (CQI) value.
  • RRC radio resource control
  • MAC-CE medium access control-control element
  • DCI downlink control information
  • RSRP target reference signal received power
  • CQI target channel quality indicator
  • the WTRU may select one or more CSI-RS resources from the plurality of CSI-RS resources based on characteristics of the one or more CSI-RS resources and the target performance requirement. The selection may be performed based on one or more aggregated values corresponding to the CSI-RS resources in the CSI-RS resource set.
  • the WTRU may determine a CQI index for each CSI- RS resource and may select a subset that achieves the required aggregated CQI value. At 208c, the selection may be based on an aggregated rank value of the one or more CSI-RS resources meeting or exceeding a target rank value. The WTRU may select CSI-RS resources that, when combined, meet the rank requirement for optimal transmission.
  • the WTRU may select one or more CSI-RS resources based on a received configuration or indication.
  • the configuration or indication may specify a subset of CSI-RS resources to be prioritized for selection or a measurement-based selection criterion such as an RSRP threshold, a CQI threshold, or a rank threshold.
  • the selection criterion may be applied based on one or more predefined rules to ensure efficient CSI-RS resource selection.
  • the priority level may be assigned based on one or more of an RSRP value, a rank value, or a CQI value of the CSI.
  • the WTRU may prioritize reporting CSI for CSI-RS resources with the highest RSRP, CQI, or rank values, ensuring that the most relevant CSI is reported while minimizing feedback overhead. Additionally, in some instances, the WTRU may determine the priority level based on the number of CSI-RS resources in the CSI-RS resource set, the number of CSI-RS antenna ports, or the number of CSI-RS resources in a selected subset.

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Abstract

Un procédé peut être mis en œuvre par une unité d'émission/réception sans fil (WTRU), et peut comprendre la réception d'informations de configuration. Les informations de configuration peuvent indiquer une ou plusieurs d'une pluralité de ressources de signal de référence (RS) d'informations d'état de canal (CSI) dans un ensemble de ressources CSI-RS. Les informations de configuration peuvent indiquer une exigence de performance cible. Une ou plusieurs ressources CSI-RS peuvent être sélectionnées parmi la pluralité de ressources CSI-RS sur la base de caractéristiques de la ou des ressources CSI-RS et de l'exigence de performance cible. Un rapport de CSI peut être envoyé. Le rapport de CSI peut comprendre une indication de la ou des ressources CSI-RS sélectionnées.
PCT/US2025/018891 2024-03-27 2025-03-07 Procédés et appareils de rapport d'informations d'état de canal pour une formation de faisceau hybride Pending WO2025207296A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2925042A1 (fr) * 2012-11-20 2015-09-30 China Academy of Telecommunications Technology Procédé, système et dispositif de transmission de signal de préambule et de mesure de signal
US20190312668A1 (en) * 2016-12-28 2019-10-10 Lg Electronics Inc. Method for receiving reference signal resources in a wireless communication system and apparatus
US20220094399A1 (en) * 2019-01-11 2022-03-24 Telefonaktiebolaget Lm Ericsson (Publ) Low overhead channel state information (csi) feedback for multi-transmission point (trp) transmission
EP4478625A2 (fr) * 2023-05-23 2024-12-18 Samsung Electronics Co., Ltd. Techniques pour un rapport multi-csi amélioré pour une adaptation de domaine spatial et de domaine de puissance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2925042A1 (fr) * 2012-11-20 2015-09-30 China Academy of Telecommunications Technology Procédé, système et dispositif de transmission de signal de préambule et de mesure de signal
US20190312668A1 (en) * 2016-12-28 2019-10-10 Lg Electronics Inc. Method for receiving reference signal resources in a wireless communication system and apparatus
US20220094399A1 (en) * 2019-01-11 2022-03-24 Telefonaktiebolaget Lm Ericsson (Publ) Low overhead channel state information (csi) feedback for multi-transmission point (trp) transmission
EP4478625A2 (fr) * 2023-05-23 2024-12-18 Samsung Electronics Co., Ltd. Techniques pour un rapport multi-csi amélioré pour une adaptation de domaine spatial et de domaine de puissance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HITACHI LTD: "Discussion on Aggregated CSI Feedback", 3GPP DRAFT; R1-122701_DISCUSSION_ON_AGGREGATED_FEEDBACK, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20120521 - 20120525, 12 May 2012 (2012-05-12), XP050600886, [retrieved on 20120512] *

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