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WO2025166742A1 - Procédés relatifs aux ressources de mesure et aux événements de déclenchement permettant un rapport de mesure initié par un ue dans une communication sans fil - Google Patents

Procédés relatifs aux ressources de mesure et aux événements de déclenchement permettant un rapport de mesure initié par un ue dans une communication sans fil

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Publication number
WO2025166742A1
WO2025166742A1 PCT/CN2024/076979 CN2024076979W WO2025166742A1 WO 2025166742 A1 WO2025166742 A1 WO 2025166742A1 CN 2024076979 W CN2024076979 W CN 2024076979W WO 2025166742 A1 WO2025166742 A1 WO 2025166742A1
Authority
WO
WIPO (PCT)
Prior art keywords
csi
mac
resource set
channel measurement
csi resource
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/CN2024/076979
Other languages
English (en)
Inventor
Hong He
Dawei Zhang
Wei Zeng
Haitong Sun
Huaning Niu
Chunxuan Ye
Dan Wu
Jie Cui
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.)
Apple Inc
Original Assignee
Apple 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 Apple Inc filed Critical Apple Inc
Priority to PCT/CN2024/076979 priority Critical patent/WO2025166742A1/fr
Publication of WO2025166742A1 publication Critical patent/WO2025166742A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present application relates to wireless devices and wireless networks including devices, computer-readable media, and methods to enable fast triggering and resource determination for UE-Initiated Beam Reporting (UIBR) .
  • UIBR UE-Initiated Beam Reporting
  • Wireless communication systems are rapidly growing in usage.
  • wireless devices such as smart phones and tablet computers have become increasingly sophisticated.
  • many mobile devices now provide access to the internet, email, text messaging, and navigation using the global positioning system (GPS) and are capable of operating sophisticated applications that utilize these functionalities.
  • GPS global positioning system
  • wireless communication standards include GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces) , LTE, LTE Advanced (LTE-A) , HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD) , IEEE 802.11 (WLAN or Wi-Fi) , BLUETOOTH TM , 5G New Radio (NR) , etc.
  • GSM Global System for Mobile communications
  • UMTS associated with, for example, WCDMA or TD-SCDMA air interfaces
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • HSPA High Speed Packet Access 2000
  • 3GPP2 CDMA2000 e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD
  • IEEE 802.11 Wi-Fi
  • BLUETOOTH TM 5G New Radio
  • embodiments disclosed herein are directed to methods and devices for fast triggering and resource determination for UE-Initiated Beam Reporting (UIBR) procedures.
  • UIBR UE-Initiated Beam Reporting
  • Embodiments herein disclose UE-initiated and/or event-driven beam management for reducing overhead and/or latency.
  • Embodiments incorporate the unified Transmission Configuration Indicator (TCI) framework, while leveraging as much as possible the legacy Channel State Indicator (CSI) measurement and reporting configuration frameworks.
  • TCI Transmission Configuration Indicator
  • CSI Channel State Indicator
  • embodiments are directed to a method performed by a UE for a UIBR procedure that includes the UE receiving Radio Resource Control (RRC) signaling that include a configuration of a list of CSI resource sets.
  • RRC Radio Resource Control
  • Each CSI resource set includes resources to be used by the UE for channel measurement in the UIBR procedure.
  • the UE receives a Medium Access Control-Control Element (MAC-CE) indicating a CSI resource set from the list of CSI resource sets to be used by the UE for channel measurement.
  • the MAC-CE is identified by a dedicated Logical Channel Identification (LCID) in a MAC subheader.
  • the UE performs channel measurement using the CSI resource set indicated by the MAC-CE and transmits a CSI report based on the channel measurement on the CSI resource set indicated by the MAC-CE.
  • LCID Logical Channel Identification
  • the MAC-CE may be a fixed or variable size.
  • the CSI resource set may include Non-Zero-Power (NZP) CSI-Reference Signal (RS) resources or Synchronization Signal Block (SSB) resources to be used for measurement in the UIBR procedure.
  • NZP Non-Zero-Power
  • RS CSI-Reference Signal
  • SSB Synchronization Signal Block
  • embodiments are directed to a method performed by a UE for a UIBR procedure that includes the UE receiving RRC signaling that includes a configuration of a CSI resource set.
  • the CSI resource set includes Reference Signals (RSs) to be used for channel measurement in a UIBR procedure for a serving cell.
  • the UE receives a MAC-CE that updates the RSs in the CSI resource set.
  • the UE performs channel measurement on at least one of the RSs in the CSI resource set that is updated by the MAC-CE and transmits a CSI-Report based on the channel measurement on the RSs updated by the MAC-CE.
  • embodiments are directed to a method performed by a UE for a UIBR procedure that includes the UE receiving RRC signaling that includes a configuration of linking TCI-states on a plurality of candidate cells in a cell group to CSI resource sets.
  • the CSI resource sets including resources to be used for channel measurement by the UE in the UIBR procedure.
  • the UE receives a DCI indicating a TCI-state to be activated and used by the UE; performs channel measurement on one or more candidate cells using CSI resource sets associated with the activated TCI-state; and transmits a CSI-Report based on the channel measurement on the CSI resource set associated with the activated TCI-state.
  • embodiments are directed to a method performed by a UE for triggering a UIBR procedure that includes the UE performing channel measurement on one or more reference resources and determining that a Reference Signal Received Power (RSRP) of a reference resource that is Quasi-Co Located (QCL) with a current TCI-state is less than an RSRP of non-reference resources by an offset value.
  • the UE transmits a CSI-Report based on the channel measurement on the non-reference resources, and the CSI-Report includes an indication of the non-reference resource.
  • RSRP Reference Signal Received Power
  • QCL Quasi-Co Located
  • embodiments are directed to a method performed by a UE for triggering a UIBR procedure that includes the UE receiving RRC signaling that includes a configuration of a first threshold and a second threshold.
  • the UE determines that an RSRP of a reference resource QCL with a current TCI-state is less than the first threshold ant that an RSRP of a non-reference resource configured by RRC signaling is greater than the second threshold.
  • the UE transmits a CSI-Report based on the channel measurement on a non-reference resource, wherein the CSI-Report comprises an indication of the non-reference resource.
  • the techniques described herein may be implemented in and/or used with a number of different types of devices, including but not limited to cellular phones, wireless devices, tablet computers, wearable computing devices, portable media players, and any of various other computing devices.
  • Figure 1 illustrates an example wireless communication system, according to some aspects.
  • Figure 2 illustrates an example block diagram of a UE, according to some aspects.
  • FIG. 3 illustrates a base station (BS) in communication with a UE device, according to some aspects.
  • Figures 4A and 4B illustrate MAC-CEs for resource set activation according to some aspects.
  • Figure 5 illustrates a MAC-CE for updating resources in a CSI resource set according to some aspects.
  • Figures 7A and 7B illustrate an example of cell group based CSI resource updating according to some aspects.
  • MIMO enhancement objectives may include UE-initiated beam reporting (UIBR) to help reduce the latency.
  • UIBR UE-initiated beam reporting
  • the embodiments disclosed herein aim to facilitate UE-initiated and/or event-driven beam management for reducing overhead and/or latency.
  • Embodiments incorporate the unified Transmission Configuration Indicator (TCI) , while leveraging as much as possible legacy CSI measurement and reporting configuration frameworks.
  • Embodiments may have particular advantages in Frequency Range 2 (FR2) and in intra-cell and inter-cell beam management with a single Transmission and Reception Point (sTRP) .
  • FR2 Frequency Range 2
  • sTRP Transmission and Reception Point
  • embodiments are directed to quickly configuring the CSI resource set that will be used for measurements in a UIBR procedure in view of the UE mobility. Embodiments are further directed to triggering events for a UIBR procedure in view of the reporting latency, signaling overhead, and the resulting reliability.
  • BM beam management
  • Memory Medium Any of various types of non-transitory memory devices or storage devices.
  • the term “memory medium” is intended to include an installation medium, e.g., a CD-ROM, floppy disks, or tape device; a computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a Flash, magnetic media, e.g., a hard drive, or optical storage; registers, or other similar types of memory elements, etc.
  • the memory medium may include other types of non-transitory memory as well or combinations thereof.
  • the memory medium may be located in a first computer system in which the programs are executed or may be located in a second different computer system which connects to the first computer system over a network, such as the Internet. In the latter instance, the second computer system may provide program instructions to the first computer for execution.
  • the term “memory medium” may include two or more memory mediums which may reside in different locations, e.g., in different computer systems that are connected over a network.
  • the memory medium may store program instructions (e.g., embodied as computer programs) that may be executed by one or more processors.
  • Carrier Medium a memory medium as described above, as well as a physical transmission medium, such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • a physical transmission medium such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • Programmable Hardware Element includes various hardware devices comprising multiple programmable function blocks connected via a programmable interconnect. Examples include FPGAs (Field Programmable Gate Arrays) , PLDs (Programmable Logic Devices) , FPOAs (Field Programmable Object Arrays) , and CPLDs (Complex PLDs) .
  • the programmable function blocks may range from fine grained (combinatorial logic or look up tables) to coarse grained (arithmetic logic units or processor cores) .
  • a programmable hardware element may also be referred to as “reconfigurable logic. ”
  • Computer System any of various types of computing or processing systems, including a personal computer system (PC) , mainframe computer system, workstation, network appliance, Internet appliance, personal digital assistant (PDA) , television system, grid computing system, or other device or combinations of devices.
  • PC personal computer system
  • mainframe computer system workstation
  • network appliance Internet appliance
  • PDA personal digital assistant
  • television system grid computing system, or other device or combinations of devices.
  • computer system can be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.
  • UE User Equipment
  • UE Device any of various types of computer systems or devices that are mobile or portable and that perform wireless communications.
  • UE devices include mobile telephones or smart phones (e.g., iPhone TM , Android TM -based phones) , portable gaming devices (e.g., Nintendo DS TM , PlayStation Portable TM , Gameboy Advance TM , iPhone TM ) , laptops, wearable devices (e.g., smart watch, smart glasses) , PDAs, portable Internet devices, music players, data storage devices, other handheld devices, in-vehicle infotainment (IVI) , in-car entertainment (ICE) devices, an instrument cluster, head-up display (HUD) devices, onboard diagnostic (OBD) devices, dashtop mobile equipment (DME) , mobile data terminals (MDTs) , Electronic Engine Management System (EEMS) , electronic/engine control units (ECUs) , electronic/engine control modules (ECMs) ,
  • EEMS Electronic Engine Management System
  • EEMS
  • Wireless Device any of various types of computer systems or devices that perform wireless communications.
  • a wireless device can be portable (or mobile) or may be stationary or fixed at a certain location.
  • a UE is an example of a wireless device.
  • Base Station or “wireless station” has the full breadth of its ordinary meaning, and at least includes a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.
  • a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.
  • the base station is implemented in the context of LTE, it may alternately be referred to as an ‘eNodeB’ or ‘eNB. ’
  • gNodeB or ‘gNB’ .
  • node may refer to one more apparatus associated with a cell that provide a wireless connection between user devices and a wired network generally.
  • Processing Element refers to various elements or combinations of elements that are capable of performing a function in a device, such as a user equipment or a cellular network device.
  • Processing elements may include, for example: processors and associated memory, portions or circuits of individual processor cores, entire processor cores, individual processors, processor arrays, circuits such as an ASIC (Application Specific Integrated Circuit) , programmable hardware elements such as a field programmable gate array (FPGA) , as well any of various combinations of the above.
  • ASIC Application Specific Integrated Circuit
  • FPGA field programmable gate array
  • band has the full breadth of its ordinary meaning, and at least includes a section of spectrum (e.g., radio frequency spectrum) in which channels are used or set aside for the same purpose.
  • spectrum e.g., radio frequency spectrum
  • Automatically refers to an action or operation performed by a computer system (e.g., software executed by the computer system) or device (e.g., circuitry, programmable hardware elements, ASICs, etc. ) , without user input directly specifying or performing the action or operation.
  • a computer system e.g., software executed by the computer system
  • device e.g., circuitry, programmable hardware elements, ASICs, etc.
  • An automatic procedure may be initiated by input provided by the user, but the subsequent actions that are performed “automatically” are not specified by the user, i.e., are not performed “manually, ” where the user specifies each action to perform.
  • a user filling out an electronic form by selecting each field and providing input specifying information is filling out the form manually, even though the computer system must update the form in response to the user actions.
  • the form may be automatically filled out by the computer system where the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user input specifying the answers to the fields.
  • the user may invoke the automatic filling of the form but is not involved in the actual filling of the form (e.g., the user is not manually specifying answers to fields but rather they are being automatically completed) .
  • the present specification provides various examples of operations being automatically performed in response to actions the user has taken.
  • Concurrent refers to parallel execution or performance, where tasks, processes, or programs are performed in an at least partially overlapping manner.
  • concurrency may be implemented using “strong” or strict parallelism, where tasks are performed (at least partially) in parallel on respective computational elements, or using “weak parallelism, ” where the tasks are performed in an interleaved manner, e.g., by time multiplexing of execution threads.
  • Configured to Various components may be described as “configured to” perform a task or tasks. In such contexts, “configured to” is a broad recitation generally meaning “having structure that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently performing that task (e.g., a set of electrical conductors may be configured to electrically connect a module to another module, even when the two modules are not connected) . In some contexts, “configured to” may be a broad recitation of structure generally meaning “having circuitry that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently on. In general, the circuitry that forms the structure corresponding to “configured to” may include hardware circuits.
  • the example wireless communication system includes a base station 102A, which communicates over a transmission medium with one or more user devices 106A and 106B, through 106Z.
  • Each of the user devices may be referred to herein as a “user equipment” (UE) .
  • UE user equipment
  • the user devices 106 are referred to as UEs or UE devices.
  • the base station (BS) 102A may be a base transceiver station (BTS) or cell site (e.g., a “cellular base station” ) and may include hardware that enables wireless communication with the UEs 106A through 106Z.
  • BTS base transceiver station
  • cell site e.g., a “cellular base station”
  • the communication area (or coverage area) of the base station may be referred to as a “cell. ”
  • the base station 102A and the UEs 106 may be configured to communicate over the transmission medium using any of various radio access technologies (RATs) , also referred to as wireless communication technologies, or telecommunication standards, such as GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces) , LTE, LTE-A, 5G NR, HSPA, 3GPP2 CDMA2000.
  • RATs radio access technologies
  • GSM Global System for Mobile communications
  • UMTS associated with, for example, WCDMA or TD-SCDMA air interfaces
  • the UEs 106 may be IoT UEs, which may comprise a network access layer designed for low-power IoT applications utilizing short-lived UE connections.
  • An IoT UE may utilize technologies such as M2M or MTC for exchanging data with an MTC server or device via a public land mobile network (PLMN) , proximity service (ProSe) or device-to-device (D2D) communication, sensor networks, or IoT networks.
  • PLMN public land mobile network
  • ProSe proximity service
  • D2D device-to-device
  • the M2M or MTC exchange of data may be a machine-initiated exchange of data.
  • An IoT network describes interconnecting IoT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure) , with short-lived connections.
  • V2X vehicles to everything
  • the IoT UEs may also execute background applications (e.g., keep-alive messages, status updates, and the like) to facilitate the connections of the IoT network.
  • background applications e.g., keep-alive messages, status updates, and the like
  • the UEs 106 may directly exchange communication data via a PC5 interface 108A.
  • the UEs 106C, 106N, and 106Z may collectively exchange communication data via a PC5 interfaces 108B, 108C, and 108D.
  • PC5 interfaces are referred to as SL connections.
  • the PC5 interface 108 may comprise one or more physical channels, including but not limited to a Physical Sidelink Shared Channel (PSSCH) , a Physical Sidelink Control Channel (PSCCH) , a Physical Sidelink Broadcast Channel (PSBCH) , and a Physical Sidelink Feedback Channel (PSFCH) .
  • PSSCH Physical Sidelink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • PSFCH Physical Sidelink Feedback Channel
  • the PC5 interface 108 may be responsible for direct communication between devices (unicast) , group messaging among select devices (groupcast) , and broadcast messaging in accordance with embodiments disclosed herein.
  • one or more of the base stations 102 may be or act as Road Side Units (RSUs) .
  • RSU may refer to any transportation infrastructure entity used for V2X communications.
  • An RSU may be implemented in or by a suitable wireless node or a stationary (or relatively stationary) UE, where an RSU implemented in or by a UE , eNB, or by a gNB.
  • an RSU is a computing device coupled with radio frequency circuitry located on a roadside that provides connectivity support to passing vehicle UEs.
  • Base station 102A and other similar base stations (such as base stations 102B through 102N) operating according to the same or a different cellular communication standard may thus be provided as a network of cells, which may provide continuous or nearly continuous overlapping service to UEs 106A-106Z and similar devices over a geographic area via one or more cellular communication standards.
  • each UE 106 may also be capable of receiving signals from (and possibly within communication range of) one or more other cells (which may be provided by base stations 102B-102Z and/or any other base stations) , which may be referred to as “neighboring cells. ” Such cells may also be capable of facilitating communication between user devices and/or between user devices and the network 100. Such cells may include “macro” cells, “micro” cells, “pico” cells, and/or cells which provide any of various other granularities of service area size.
  • base stations 102A and 102B illustrated in Figure 1 may be macro cells, while base station 102Z may be a micro cell. Other configurations are also possible.
  • base station 102A may be a next generation base station, (e.g., a 5G New Radio (5G NR) base station, or “gNB” ) .
  • a gNB may be connected to a legacy evolved packet core (EPC) network and/or to a NR core (NRC) /5G core (5GC) network.
  • EPC legacy evolved packet core
  • NRC NR core
  • 5GC /5G core
  • a gNB cell may include one or more transition and reception points (TRPs) .
  • TRPs transition and reception points
  • a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.
  • the base station 102A and one or more other base stations 102 support joint transmission, such that UE 106 may be able to receive transmissions from multiple base stations (and/or multiple TRPs provided by the same base station) .
  • both base station 102A and base station 102C are shown as serving UE 106A.
  • a UE 106 may be capable of communicating using multiple wireless communication standards.
  • the UE 106 may be configured to communicate using a wireless networking (e.g., Wi-Fi) and/or peer-to-peer wireless communication protocol (e.g., Bluetooth, Wi-Fi peer-to-peer, and the like) in addition to some of the cellular communication protocols discussed herein.
  • the UE 106 may also or alternatively be configured to communicate using one or more global navigational satellite systems (GNSS) (e.g., GPS or GLONASS) , one or more mobile television broadcasting standards (e.g., ATSC-M/H) , and/or any other wireless communication protocol, if desired.
  • GNSS global navigational satellite systems
  • ATSC-M/H mobile television broadcasting standards
  • ATSC-M/H any other wireless communication protocol
  • the UE 106 may be a device with cellular communication capability such as a mobile phone, a hand-held device, a computer, a laptop, a tablet, a smart watch, or other wearable device, or virtually any type of wireless device.
  • the UE 106 may include a processor (processing element) that is configured to execute program instructions stored in memory.
  • the UE 106 may perform any of the method aspects described herein by executing such stored instructions.
  • the UE 106 may include a programmable hardware element such as an FPGA (field-programmable gate array) , an integrated circuit, and/or any of various other possible hardware components that are configured to perform (e.g., individually or in combination) any of the method aspects described herein, or any portion of any of the method aspects described herein.
  • FPGA field-programmable gate array
  • the UE 106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies.
  • the UE 106 may be configured to communicate using, for example, NR or LTE using at least some shared radio components.
  • the UE 106 could be configured to communicate using CDMA2000 (1xRTT /1xEV-DO /HRPD /eHRPD) or LTE using a single shared radio and/or GSM or LTE using the single shared radio.
  • the shared radio may couple to a single antenna, or may couple to multiple antennas (e.g., for a multiple-input multiple output (MIMO) configuration) for performing wireless communications.
  • MIMO multiple-input multiple output
  • the PDCCH may carry information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UEs 106 about the transport format, resource allocation, and HARQ (Hybrid Automatic Repeat Request) information related to the uplink shared channel.
  • HARQ Hybrid Automatic Repeat Request
  • downlink scheduling assigning control and shared channel resource blocks to the UE 102 within a cell
  • the downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) each of the UEs.
  • the PDCCH may use control channel elements (CCEs) to convey the control information.
  • CCEs control channel elements
  • the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
  • Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs) .
  • Four Quadrature Phase Shift Keying (QPSK) symbols may be mapped to each REG.
  • the PDCCH may be transmitted using one or more CCEs, depending on the size of the Downlink Control Information (DCI) and the channel condition.
  • DCI Downlink Control Information
  • There may be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L 1, 2, 4, or 8) .
  • FIG. 2 illustrates user equipment 106 (e.g., one of the devices 106A through 106N) in communication with a base station 102 or other user equipment 106, according to some aspects.
  • the UE 106 may be a device with cellular communication capability such as a mobile phone, a hand-held device, a computer, a laptop, a tablet, a smart watch, or other wearable device, or virtually any type of wireless device.
  • a radio may include any combination of a baseband processor, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc. ) , or digital processing circuitry (e.g., for digital modulation as well as other digital processing) .
  • the radio may implement one or more receive and transmit chains using the aforementioned hardware.
  • the UE 106 may share one or more parts of a receive and/or transmit chain between multiple wireless communication technologies, such as those discussed above.
  • the PDCCH may use control channel elements (CCEs) to convey the control information.
  • CCEs control channel elements
  • the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub-block interleaver for rate matching.
  • Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as resource element groups (REGs) .
  • Four Quadrature Phase Shift Keying (QPSK) symbols may be mapped to each REG.
  • the PDCCH can be transmitted using one or more CCEs, depending on the size of the downlink control information (DCI) and the channel condition.
  • DCI downlink control information
  • There can be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L 1, 2, 4, or 8) .
  • FIG. 2 illustrates an example simplified block diagram of a communication device 106, according to some aspects. It is noted that the block diagram of the communication device of Figure 2 is only one example of a possible communication device.
  • communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device) , a tablet, and/or a combination of devices, among other devices.
  • the communication device 106 may include a set of components 200 configured to perform core functions.
  • this set of components may be implemented as a system on chip (SOC) , which may include portions for various purposes.
  • SOC system on chip
  • this set of components 200 may be implemented as separate components or groups of components for the various purposes.
  • the set of components 200 may be coupled (e.g., communicatively; directly or indirectly) to various other circuits of the communication device 106.
  • the communication device 106 may include various types of memory (e.g., including NAND flash 210) , an input/output interface such as connector I/F 220 (e.g., for connecting to a computer system; dock; charging station; input devices, such as a microphone, camera, keyboard; output devices, such as speakers; etc. ) , the display 260, which may be integrated with or external to the communication device 106, and wireless communication circuitry 230 (e.g., for LTE, LTE-A, NR, UMTS, GSM, CDMA2000, Bluetooth, Wi-Fi, NFC, GPS, etc. ) .
  • communication device 106 may include wired communication circuitry (not shown) , such as a network interface card, e.g., for Ethernet.
  • the communication device 106 may also include and/or be configured for use with one or more user interface elements.
  • the user interface elements may include any of various elements, such as display 260 (which may be a touchscreen display) , a keyboard (which may be a discrete keyboard or may be implemented as part of a touchscreen display) , a mouse, a microphone and/or speakers, one or more cameras, one or more buttons, and/or any of various other elements capable of providing information to a user and/or receiving or interpreting user input.
  • processor 202 may include one or more processing elements.
  • processor 202 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor 202.
  • each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of processor (s) 202.
  • the base station 102 may include at least one network port 370.
  • the network port 370 may be configured to couple to a telephone network and provide a plurality of devices, such as UE devices 106, access to the telephone network as described above in Figures 1 and 2.
  • the network port 370 may also or alternatively be configured to couple to a cellular network, e.g., a core network of a cellular service provider.
  • the core network may provide mobility related services and/or other services to a plurality of devices, such as UE devices 106.
  • the network port 370 may couple to a telephone network via the core network, and/or the core network may provide a telephone network (e.g., among other UE devices serviced by the cellular service provider) .
  • base station 102 may be a next generation base station, e.g., a 5G New Radio (5G NR) base station, or “gNB. ”
  • base station 102 may be connected to a legacy evolved packet core (EPC) network and/or to a NR core (NRC) /5G core (5GC) network.
  • EPC legacy evolved packet core
  • NRC NR core
  • 5GC /5G core
  • base station 102 may be considered a 5G NR cell and may include one or more transition and reception points (TRPs) .
  • TRPs transition and reception points
  • a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.
  • the base station 102 may include at least one antenna 334, and possibly multiple antennas.
  • the at least one antenna 334 may be configured to operate as a wireless transceiver and may be further configured to communicate with UE devices 106 via radio 330.
  • the antenna 334 communicates with the radio 330 via communication chain 332.
  • Communication chain 332 may be a receive chain, a transmit chain or both.
  • the radio 330 may be configured to communicate via various wireless communication standards, including, but not limited to, 5G NR, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.
  • the base station 102 may include a multi-mode radio, which is capable of performing communications according to any of multiple wireless communication technologies (e.g., 5G NR and LTE, 5G NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc. ) .
  • multiple wireless communication technologies e.g., 5G NR and LTE, 5G NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.
  • the BS 102 may include hardware and software components for implementing or supporting implementation of features described herein.
  • the processor 304 of the base station 102 may be configured to implement or support implementation of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer readable memory medium) .
  • the processor 304 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) , or as an ASIC (Application Specific Integrated Circuit) , or a combination thereof.
  • FIG. 4B illustrates an example of a multi-cell MAC-CE for fast CSI resource set activation.
  • the MAC-CE 410 may be applied to multiple cells for fast CSI resource set activation.
  • the MAC-CE 410 is used to update the CSI resource set associated different serving cells.
  • the MAC-CE 410 has a variable size and includes fields “C i ” (e.g., C 4 412) that indicate that the serving cell with cell ID “i” to which the MAC-CE is applied.
  • the MAC-CE 410 also includes the CSI resource set ID (e.g., CSI Resource Set ID #3 414) for each serving cell.
  • the value of the “C i ” field may be used to indicate an update to the CSI resource set for the serving cell.
  • RRC signaling is used to configure an initial CSI resource set to be used. Then, a new MAC-CE may be used to update the resources of the CSI resource set. For example, the RSs may be updated based on the most recent UL measurements performed by the network.
  • FIG. 5 illustrates a MAC-CE for updating resources in a CSI resource set according to some aspects.
  • the MAC-CE 500 includes the Serving cell ID 502, and a bitmap field “P i ” (e.g., subfield “P 1 ” 512) that indicates an update to the RS with index “i” .
  • the number of “P i ” fields may be hard coded in the specification or may be explicitly configured by RRC signaling for a given UE.
  • the MAC-CE 500 also includes RS ID #k fields (e.g., RS ID field #1 514) that indicate the RS ID to be used for the UIBR measurement for the RS with ordinal position “k” from the “P i ” fields.
  • RS ID #k fields e.g., RS ID field #1 514
  • the indication at “P 1 ” 512 is associated with RS ID field #1 514.
  • the value of the “P i ” fields may be used to indicate the RS has been updated. For example, a value of “1” for a given “P i ” indicates the RS with index “i” is updated, and a value of “0” indicates that the RS with index “i” is maintained.
  • Figure 6 illustrates a scenario for updating resources in a CSI resource set according to some aspects.
  • Figure 6 illustrates a path of a UE 606 in a serving cell 600.
  • the UE 606 is configured by RRC signaling with a first RS set ⁇ 1, 2, 3, 4 ⁇ 608A.
  • the UE 606 receives a MAC-CE that updates the first RS set ⁇ 1, 2, 3, 4 ⁇ 608A to the second RS set ⁇ 3, 4, 5, 6 ⁇ 608B.
  • the CSI resource set determination may be based on cell groups.
  • RRC signaling is used to divide the cells into sets of cell groups. For each candidate cell in the cell group, RRC signaling is used to configure a set of CSI resource sets to be used by the UE for a UIBR procedure. One of the candidate CSI resource sets may be configured as the initial CSI resource set by RRC signal.
  • Figures 7A and 7B illustrate an example of cell group based CSI resource updating according to some aspects.
  • Figure 7A demonstrates an example cell group that may be established through RRC signaling.
  • the cell group includes Cell #1 with CSI resources ⁇ 1, 2, 3, 4 ⁇ 708A and Cell #2 with CSI resources ⁇ 1, 5 ⁇ 708B.
  • the cell groups may be established based on the spatial correlation across the cells.
  • Figure 7B demonstrates updating a cell group based on the received CRA in accordance with embodiments.
  • RRC signaling is used to divide the CSI resource sets for each candidate cell in a CG. More specifically, Cell #1 is divided into CSI resource set #1 708 A that includes the CSI resources ⁇ 1, 2, 3, 4 ⁇ and CSI resource set #2 709A that includes CSI resources ⁇ 7,8, 9 ⁇ . Cell #2 is divided into CSI resource set #1 708B that includes the CSI resources ⁇ 1, 5 ⁇ and CSI resource set #2 that includes CSI resources ⁇ 16, 17 ⁇ .
  • a first cell group 720 and a second cell group 722 may be established.
  • the organization of the resources in the cell groups are spatially correlated across the candidate cells. Accordingly, the CRA field may facilitate a fast cell group based CSI resource update.
  • the CRA may include a codepoint “00” to activate the CSI resource sets identified as CSI resource set #1 for all the candidate cells in the first cell group 720.
  • Codepoint “01” may be used to activate the CSI resource sets identified as CSI resource set #2 for all the candidate cells in the second cell group 722.
  • a TCI-state #k with a QCL-RS is linked to a CSI resource set #x associated with a RS set.
  • the RS set may be established using adjacent DL beams.
  • the UE would assume the CSI resource set #x is activated for a UIBR procedure using the linked RS set.
  • Embodiments disclosed herein are further directed to triggering events for a UIBR procedure in view of the reporting latency, signaling overhead, and the resulting reliability.
  • the QCL source RS of the indicated TCI-state is termed as a “reference CSI resource” and other RSs in the activated CSI resource set are termed as a “non-reference CSI resource. ”
  • the UIBR procedure when a measurement result (e.g., an L1-RSRP) associated with a non-reference CSI resource is better than the measurement result of the reference CSI resource by an offset amount, the UIBR procedure is triggered.
  • the offset value may be provided by RRC signaling.
  • the offset value may be provided as part of the L1 measurement report configuration.
  • two thresholds may be used.
  • the two thresholds may be configured through RRC signaling.
  • the UIBR procedure is trigged if two conditions are met. The first condition is that the measured result of the reference CSI resource becomes less than the first threshold, and the second condition is that at least one measured result associated with a non-reference CSI resource in the activated CSI resource set becomes greater than the second threshold.
  • the value of the parameter ⁇ allows for a weighted filtering based on a previous measurement.
  • Embodiments disclosed herein advantageous provide methods to quickly configure or update a CSI resource set for measurements in a UIBR procedure while considering the UE mobility.
  • Embodiments also define conditions to trigger a UIBR procedure taking into account the reporting latency, result reliability and signaling overhead.
  • aspects of the present disclosure may be realized in any of various forms. For example, some aspects may be realized as a computer-implemented method, a computer-readable memory medium, or a computer system. Other aspects may be realized using one or more custom-designed hardware devices such as ASICs. Still other aspects may be realized using one or more programmable hardware elements such as FPGAs.
  • a non-transitory computer-readable memory medium may be configured so that it stores program instructions and/or data, where the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of a method aspects described herein, or, any combination of the method aspects described herein, or, any subset of any of the method aspects described herein, or, any combination of such subsets.

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Abstract

L'invention concerne des procédés et des dispositifs de déclenchement rapide et de détermination de ressources pour des procédures de rapport de faisceau initiées par l'UE (UIBR). Les procédés comprennent une gestion de faisceau initiée par l'UE et/ou dirigée par les événements pour réduire la surcharge et/ou la latence. Des modes de réalisation incorporent la structure unifiée d'indicateur de configuration de transmission (TCI), tout en tirant parti autant que possible des structures de configuration existantes pour la mesure et le rapport d'indicateur d'état de canal (CSI).
PCT/CN2024/076979 2024-02-08 2024-02-08 Procédés relatifs aux ressources de mesure et aux événements de déclenchement permettant un rapport de mesure initié par un ue dans une communication sans fil Pending WO2025166742A1 (fr)

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US20220022180A1 (en) * 2020-07-17 2022-01-20 Samsung Electronics Co., Ltd. Method and apparatus for beam management and training
US20230083362A1 (en) * 2021-09-10 2023-03-16 Qualcomm Incorporated Techniques for enabling beam management radio resource control parameters
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