WO2026023080A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication

Info

Publication number
WO2026023080A1
WO2026023080A1 PCT/JP2024/026881 JP2024026881W WO2026023080A1 WO 2026023080 A1 WO2026023080 A1 WO 2026023080A1 JP 2024026881 W JP2024026881 W JP 2024026881W WO 2026023080 A1 WO2026023080 A1 WO 2026023080A1
Authority
WO
WIPO (PCT)
Prior art keywords
tci state
tci
indicated
terminal
low
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/JP2024/026881
Other languages
English (en)
Japanese (ja)
Inventor
慎也 熊谷
崇伸 小野田
椋己 平野
真哉 岡村
聡 永田
ユー ジャン
アンシン リ
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.)
NTT Docomo Inc
Original Assignee
NTT Docomo 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 NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2024/026881 priority Critical patent/WO2026023080A1/fr
Publication of WO2026023080A1 publication Critical patent/WO2026023080A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the terminal comprises a receiving unit that receives a TCI state indicated by a joint TCI (Transmission Configuration Indicator) state or a separated TCI state from a base station, and a control unit that applies the TCI state to a low-power signal, and the separated TCI state indicates at least one of an uplink TCI state or a downlink TCI state.
  • TCI Transmission Configuration Indicator
  • This embodiment defines a method for applying the TCI status indicated by a base station to low-power signals in wireless communication systems, which was not previously specified, enabling terminals to properly receive low-power signals.
  • FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • FIG. 10 is a diagram showing an example of the configuration of a TCI and parameters set in the TCI state.
  • FIG. 1 is a diagram for explaining an integrated TCI framework.
  • FIG. 10 is a diagram illustrating an example of the operation of the terminal according to the first embodiment.
  • FIG. 10 is a diagram illustrating an example of the operation of a terminal according to a second embodiment.
  • FIG. 11 is a diagram illustrating an example of the operation of a terminal according to a third embodiment.
  • FIG. 10 is a diagram showing an example of the configuration of a TCI and parameters set in the TCI state.
  • FIG. 1 is a diagram for explaining an integrated TCI framework.
  • FIG. 10 is a diagram
  • FIG. 10 is a diagram illustrating an example of the operation of a terminal according to a fourth embodiment. A figure showing an example of an operation in which a TCI state is applied to a low-power signal in Example 4-3.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to the present embodiment.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to the present embodiment.
  • 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR NR
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (for example, Flexible Duplex, etc.).
  • "configuring" wireless parameters etc. may mean that predetermined values are pre-configured, or that wireless parameters notified from the base station 10 or the terminal 20 are set.
  • FIG. 1 is a diagram showing an example of the configuration of a wireless communication system in this embodiment.
  • the wireless communication system in this embodiment includes a base station 10 and a terminal 20.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a wireless signal are defined in the time domain and the frequency domain.
  • the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
  • the base station 10 transmits synchronization signals and system information to the terminal 20.
  • the synchronization signals are, for example, PSS and SSS.
  • the system information is transmitted, for example, via the PBCH and is also called broadcast information.
  • the synchronization signals and system information may also be called SSB (SS/PBCH block).
  • the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communications to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via the primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • the terminal 20 may communicate via the primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • Terminal 20 is a communication device equipped with wireless communication functions, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from base station 10 and measures propagation path quality based on the reception results of the reference signals.
  • M2M Machine-to-Machine
  • Low-Power Wake Up Signal is called LP-WUS or WUS
  • Low-Power Wake Up Receiver is called LP-WUR, WUR, or LR.
  • the LR a simple circuit that operates with lower power consumption than the Main Radio (MR), which is the circuit used for normal data communications, operates as an alternative to the MR, introducing a state called Ultra-Deep Sleep.
  • the LR may have a function that triggers the MR to be powered off or powered on when it receives an LP-WUS signal.
  • an OFDM sequence is specified in which an OOK (OOK-1 and/or OOK-4) based LP-WUS is overlaid on top of the OOK symbols, and at least LP-WUS duty cycle monitoring is supported.
  • OOK OOK-1 and/or OOK-4
  • the LP-WUS design must ensure that the same information is delivered in IDLE/INACTIVE operation regardless of the LP-WUS type.
  • the OFDM sequence may carry information.
  • RRC IDLE/INACTIVE mode - Specifying the procedures and configurations for LP-WUS to indicate paging monitoring triggered by LP-WUS, including at least the configuration, subgrouping and entry/exit conditions for LP-WUS monitoring.
  • an LP-SS with a periodicity of Y [ms] is assigned to the LP-WUR.
  • the LP-SS is based on OOK-1 and/or OOK-4 waveforms, with or without an OFDM sequence overlay.
  • the existing PSS/SSS can be used instead of the LP-SS for synchronization and RRM.
  • RRC CONNECTED mode this specifies the procedure to enable UE MR PDCCH monitoring using LP-WUS as a trigger, including the procedure to enable and disable LP-WUS monitoring.
  • CONNECTED mode UE MR ultra-deep sleep is not taken into account, and UE RRM/RLM/BFD/CSI measurements are performed by the MR.
  • the target coverage for LP-WUS and LP-SS is the PUSCH coverage of message 3. Optimization of LP-WUS signal design for idle/inactive mode takes priority over optimization for connected mode.
  • the LP-WUS will be quasi-co-located (QCL) with an existing NR signal/channel/CORESET in the TCI state (Transmission Configuration Indicator State). Whether the existing NR signal/channel/CORESET will be the QCL source for the LP-WUS and the QCL relationship between the LP-WUS and the existing NR signal/channel/CORESET are not defined.
  • each LO will be composed of N*K LP-WUS MOs, where N is the number of beams corresponding to the LP-WUS, and K is the number of LP-WUS MOs for each beam.
  • N is the number of beams corresponding to the LP-WUS
  • K is the number of LP-WUS MOs for each beam.
  • the relationship between the LO and the LP-WUS is not specified.
  • QCL is an index that indicates the statistical properties of a signal/channel. For example, if one signal/channel and another signal/channel are in a QCL relationship, it means that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) between these different signals/channels is the same (it is a QCL with respect to at least one of these).
  • QCL types Multiple types (QCL types) of QCLs are specified to indicate large-scale characteristics and beam information. For example, there are four QCL types, A-D, which have different parameters (or parameter sets) that can be assumed to be identical.
  • QCL-Type A includes parameters for Doppler shift, Doppler spread, mean delay, and delay spread.
  • QCL-Type B includes Doppler shift and Doppler spread.
  • QCL-Type C includes Doppler shift and mean delay.
  • QCL-Type D includes spatial reception parameters.
  • TCI indicates that the CSI-RS or PDSCH/PDCCH DMRS can reference the large-scale characteristics of one or two RSs (SSB index or NZP-CSI-RS-Resource).
  • the TCI state (TCI-State) is information related to the QCL of a signal/channel, and may also be referred to as spatial reception parameters or spatial relationship information.
  • the TCI state may be set in the terminal for each channel or signal.
  • Figure 2 shows an example of the TCI configuration and parameters set in the TCI state.
  • the beam indication (TCI state/spatial relationship/SRI indication) mechanism in 3GPP Rel. 15 was flexible but complex. Generally, a base station would indicate a single optimal DL/UL beam for all DL/UL channels (CHs)/reference signals (RSs) in operation. However, CH/RS independent beam indication in Rel. 15 was inefficient in terms of signaling, base station operation, and terminal implementation.
  • CHs DL/UL channels
  • RSs reference signals
  • 3GPP Rel. 17 restructured the Rel. 15 beam direction mechanism, allowing the base station to indicate a single "indicated TCI state" to the terminal via RRC/MAC CE/DCI, and for the terminal to apply the "indicated TCI state" to multiple DL/UL CH/RS.
  • This Rel. 17 beam direction mechanism is called the Rel. 17 unified TCI framework, as shown in Figure 3.
  • the Rel. 17 unified TCI framework did not support low-power signals such as LP-WUS.
  • This embodiment defines a method for applying the TCI state indicated by a base station to low-power signals (e.g., LP-WUS) in wireless communication systems, which was not previously specified, enabling terminals to properly receive low-power signals. This embodiment is described below.
  • low-power signals e.g., LP-WUS
  • LP-WUS low power wake-up signal
  • LP-SS low power synchronization signal
  • legacy (conventional) NR signals/channels are examples of signals that do not include low power signals or are different from low power signals.
  • the terminal in this embodiment may be a terminal in RRC_CONNECTED mode.
  • the terminal in this embodiment is not limited to a terminal in RRC_CONNECTED mode.
  • the notation [A/B/C/D] means at least one of A, B, C, or D, and any combination such as A and B or A, B and C is possible.
  • Example 1 according to the first embodiment, as shown in FIG. 4, when the terminal 20 is configured with LP-WUS (step S101), the terminal 20 is configured with the unified TCI framework (step S102).
  • the terminal 20 is configured with LP-WUS means one or more of the following:
  • the terminal 20 is compatible with/capable of using (supports) a low-power wake-up receiver (LP-WUR).
  • LP-WUR low-power wake-up receiver
  • - Terminal 20 can receive LP-WUS and/or LP-SS.
  • LP-WUS and/or LP-SS settings are indicated to the terminal 20 by the base station 10.
  • LP-WUS and/or LP-SS information from the base station 10 is set for the terminal 20.
  • Configured with unified TCI framework means configured using [dl-OrJointTCI-StateList/ul-TCI-StateList/unifiedTCI-StateRef/TCI-UL-State].
  • the LP-WUS may include [only the LP-WUS payload portion/only the LP-WUS preamble portion/both the LP-WUS payload portion and the LP-WUS preamble portion].
  • the terminal 20 configured with LP-WUS can be configured with an integrated TCI framework.
  • Example 2 when the terminal 20 is configured with the LP-WUS and the integrated TCI framework (step S201), the terminal 20 receives an “indicated TCI state” indicating one joint TCI state or one separated TCI state from the base station 10 (step S202).
  • Joint TCI state is a configuration in which the same TCI state is used for both downlink (DL) and uplink (UL) transmission and reception. For example, the beamforming and spatial transmission parameters indicated by the TCI state are applied uniformly to both directions of communication. Using a joint TCI state ensures consistency in beamforming direction and spatial characteristics. This is useful for maintaining a stable link in scenarios where similar propagation conditions occur between the downlink and uplink paths.
  • Separate TCI state is a configuration in which different TCI states are used for downlink reception and uplink transmission. This allows beamforming and spatial transmission parameters to be optimized separately for each direction.
  • the use of separate TCI states provides the flexibility to optimize downlink and uplink transmission and reception separately. This is useful in scenarios where the propagation conditions or beamforming requirements differ between the downlink and uplink paths.
  • Example 2-1 For LP-WUS, legacy (conventional) joint TCI states or separate TCI states may be used.
  • Figure 6 is a diagram showing an example of a legacy (conventional) joint TCI state or separated TCI state in Example 2-1.
  • the joint TCI state includes a TCI state field and a joint TCI item.
  • the joint TCI item is set with the ID of the TCI (TCI state) that applies to the joint TCI state.
  • the separated TCI status includes a TCI status field and items for DL TCI and UL TCI.
  • the ID of the TCI (TCI status) that applies to each of the DL TCI and UL TCI items is set.
  • the base station 10 may indicate to the terminal 20 one "joint TCI state” or "DL TCI and/or UL TCI state.” That is, the terminal 20 receives one "joint TCI state” or "DL (Downlink) TCI and/or UL (Uplink) TCI state" transmitted by the base station 10.
  • the terminal 20 may assume that the joint TCI state can be applied to [LP-WUS/LP-SS].
  • the isolated TCI state includes "DL TCI and/or UL TCI"
  • the indicated DL TCI state applies to [LP-WUS/LP-SS].
  • terminal 20 assumes that the TCI state of [LP-WUS/LP-SS] will not be changed.
  • New joint TCI states and/or separate TCI states may be defined for the LP-WUS.
  • Figure 7 is a diagram showing an example of a newly defined joint TCI state or split TCI state in Example 2-2.
  • the joint TCI state includes a TCI state field and a joint TCI item.
  • the joint TCI item is set with the ID of the TCI (TCI state) to which DL/Ul and LP-WUS are applied.
  • the separated TCI status includes the TCI status field, DL TCI, UL TCI, and LP-WUS TCI items.
  • the ID of the TCI (TCI status) that applies to each of the DL TCI, UL TCI, and LP-WUS TCI items is set.
  • the base station 10 may indicate one "joint TCI” or "DL TCI, UL TCI and/or LP-WUS TCI” to the terminal 20.
  • the terminal 20 receives the "joint TCI” or "DL TCI, UL TCI and/or LP-WUS TCI” transmitted by the base station 10.
  • one code point in the "Transmission configuration indication" field of the corresponding DCI may indicate any of the following:
  • - LP-WUS TCI status All DL TCI states, UL TCI states and LP-WUS TCI states - Both DL TCI state and LP-WUS TCI state (when DL TCI and LP-WUS TCI are assumed to be adjusted simultaneously) - LP-WUS TCI state only - It is not possible to indicate only UL TCI status and LP-WUS TCI status at the same codepoint (in other words, DL TCI status is indicated at the same codepoint as UL TCI status and LP-WUS TCI status). If one "joint TCI state" is indicated, the terminal 20 may assume that the joint TCI state is applicable to [LP-WUS/LP-SS].
  • each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (e.g., via wire, wirelessly, etc.) and these multiple devices.
  • the functional block may be realized by combining the single device or multiple devices with software.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and storage device 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data from and to the storage device 1002 and auxiliary storage device 1003.
  • the processor 1001 for example, runs an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, or communication module, for example.
  • the communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc. to implement at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmitting/receiving antenna, amplifier unit, transmitting/receiving unit, transmission path interface, etc. may be implemented by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a physically or logically separated transmitting unit and receiving unit.
  • each device such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by this hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • FIG. 14 shows an example configuration of vehicle 2001.
  • vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
  • a communication device mounted on vehicle 2001 and may be applied to communication module 2013, for example.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and rear wheels based on the operation of the steering wheel operated by the user.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, audio system, speakers, television, and radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices.
  • the information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the information service unit 2012 may include input devices that accept input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices that output to the outside (e.g., a display, speaker, LED lamp, touch panel, etc.).
  • the communications module 2013 may transmit, via wireless communication, to an external device at least one of the following: signals from the various sensors 2021-2028 input to the electronic control unit 2010; information obtained based on these signals; and information based on input from the outside (user) obtained via the information service unit 2012.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may also be referred to as input units that accept input.
  • the PUSCH transmitted by the communications module 2013 may include information based on the above input.
  • the communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores the various information received from external devices in memory 2032 that can be used by the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc. provided in the vehicle 2001.
  • the separated TCI state indicates at least one of an uplink TCI state or a downlink TCI state.
  • the control unit sets the downlink TCI state to the indicated TCI state and applies the indicated TCI state to the low power signal; 2.
  • the control unit does not apply the indicated TCI state to the low-power signal.
  • the separated TCI state indicates at least one of an uplink TCI state, a downlink TCI state, or a TCI state for the low power signal; when the separated TCI state indicates a TCI state for the low-power signal, the control unit sets the TCI state for the low-power signal to the indicated TCI state and applies the indicated TCI state to the low-power signal; 2. The terminal of claim 1, wherein when the separated TCI state does not indicate a TCI state for the low-power signal, the control unit does not apply the indicated TCI state to the low-power signal.
  • the receiving unit receives, from the base station, information instructing use of an integrated TCI framework by higher layer signaling;
  • the receiving unit receives a downlink shared channel scheduled by downlink control information; 2.
  • the control unit applies the indicated TCI state to the low-power signal after a predetermined period has elapsed after the last symbol of the downlink shared channel having a positive HARQ-ACK corresponding to the downlink control information, when the indicated TCI state is different from a TCI state received before receiving the indicated TCI state.
  • a communication method performed by a terminal comprising: receiving a TCI status indicated by a joint TCI status or a split TCI status from a base station; applying the TCI state to a low power signal; The communication method, wherein the split TCI state indicates at least one of an uplink TCI state or a downlink TCI state.
  • All of the above configurations define a method for applying the TCI status indicated by a base station to low-power signals in wireless communication systems, which was not previously specified, and enable terminals to properly receive low-power signals.
  • the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to this embodiment and the software operated by the processor of the terminal 20 according to this embodiment may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
  • the notification of information may be performed by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure may be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), or other suitable systems, and next generation systems enhanced based on these. Additionally, multiple systems may be combined (for example, a combination of at least one of LTE and LTE-A with 5G).
  • certain operations described as being performed by the base station 10 may also be performed by its upper node in some cases.
  • a network consisting of one or more network nodes having a base station 10 it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW). While the above example illustrates a case where there is one other network node other than the base station 10, the other network node may also be a combination of multiple other network nodes (for example, an MME and an S-GW).
  • Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.
  • the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wireless technology such as infrared or microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • a channel and a symbol may be a signal (signaling).
  • a signal may be a message.
  • a component carrier CC may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • radio resources may be indicated by an index.
  • the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the mathematical formulas using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.
  • Base station BS
  • radio base station base station
  • base station device fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base station and base station subsystem that provides communication services within this coverage area.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and may move at any speed. Naturally, this also includes cases where the moving object is stationary.
  • the moving object examples include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon.
  • the moving object may also be a moving object that moves autonomously based on an operation command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
  • at least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • the base station in the present disclosure may be read as a user terminal.
  • the aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminals 20 may be configured to have the functions possessed by the base station 10 described above.
  • terms such as “uplink” and “downlink” may be read as terms corresponding to communication between terminals (for example, "side”).
  • terms such as uplink channel and downlink channel may be read as side channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions possessed by the user terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching a table, database, or other data structure), and ascertaining something that is considered to be a “determination.”
  • Determining and “determining” may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and so on.
  • judgment and “decision” can include regarding actions such as resolving, selecting, choosing, establishing, and comparing as having been “judgment” or “decision.” In other words, “judgment” and “decision” can include regarding some action as having been “judgment” or “decision.” Furthermore, “judgment (decision)” can be interpreted as “assuming,” “expecting,” “considering,” etc.
  • connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter/receiver in the frequency domain, and specific windowing processing performed by the transmitter/receiver in the time domain.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame structure specific filtering processing performed by the transmitter/receiver in the frequency domain
  • specific windowing processing performed by the transmitter/receiver in the time domain specific windowing processing performed by the transmitter/receiver in the time domain.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols or SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols).
  • a slot may also be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Other names corresponding to radio frame, subframe, slot, minislot, and symbol may also be used.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) as in existing LTE, or a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

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

Abstract

Le terminal selon l'invention comprend : une unité de réception qui reçoit, en provenance d'une station de base, un état d'indicateur de configuration de transmission (TCI) indiqué par un état TCI conjoint ou un état TCI séparé ; et une unité de commande qui applique l'état TCI à un signal basse puissance. L'état TCI séparé indique un état TCI de liaison montante et/ou un état TCI de liaison descendante.
PCT/JP2024/026881 2024-07-26 2024-07-26 Terminal et procédé de communication Pending WO2026023080A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/026881 WO2026023080A1 (fr) 2024-07-26 2024-07-26 Terminal et procédé de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/026881 WO2026023080A1 (fr) 2024-07-26 2024-07-26 Terminal et procédé de communication

Publications (1)

Publication Number Publication Date
WO2026023080A1 true WO2026023080A1 (fr) 2026-01-29

Family

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Family Applications (1)

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PCT/JP2024/026881 Pending WO2026023080A1 (fr) 2024-07-26 2024-07-26 Terminal et procédé de communication

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Country Link
WO (1) WO2026023080A1 (fr)

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