WO2023242928A1 - Terminal, station de base, système et procédé de communication radio - Google Patents

Terminal, station de base, système et procédé de communication radio Download PDF

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Publication number
WO2023242928A1
WO2023242928A1 PCT/JP2022/023691 JP2022023691W WO2023242928A1 WO 2023242928 A1 WO2023242928 A1 WO 2023242928A1 JP 2022023691 W JP2022023691 W JP 2022023691W WO 2023242928 A1 WO2023242928 A1 WO 2023242928A1
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Prior art keywords
specific
reference signal
demodulation reference
configuration
base station
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PCT/JP2022/023691
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
浩樹 原田
聡 永田
ルフア ヨウ
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2022/023691 priority Critical patent/WO2023242928A1/fr
Publication of WO2023242928A1 publication Critical patent/WO2023242928A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • NTN Non-Terrestrial Network
  • satellites artificial satellites
  • DM-RS demodulation reference signal
  • the present invention has been made to solve the above-mentioned problems, and its purpose is to provide a terminal, a base station, a wireless communication system, and a wireless communication method that can perform appropriate DM-RS communication in NTN. do.
  • One aspect of the disclosure includes a communication unit that executes communication of a specific demodulation reference signal in a non-terrestrial network, and a communication unit that executes channel estimation based on the specific demodulation reference signal, or and a control unit that assumes channel estimation according to the present invention, and the specific demodulation reference signal has a configuration different from that of existing demodulation reference signals.
  • One aspect of the disclosure includes a terminal and a base station, and at least one of the terminal and the base station includes a communication unit that executes communication of a specific demodulation reference signal in a non-terrestrial network; a control unit that performs channel estimation based on the reference signal for demodulation or assumes channel estimation based on the reference signal for specific demodulation, and the reference signal for specific demodulation is different from the reference signal for existing demodulation.
  • a terminal and a base station includes a communication unit that executes communication of a specific demodulation reference signal in a non-terrestrial network; a control unit that performs channel estimation based on the reference signal for demodulation or assumes channel estimation based on the reference signal for specific demodulation, and the reference signal for specific demodulation is different from the reference signal for existing demodulation.
  • FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10. As shown in FIG. FIG. 2 is a diagram showing frequency ranges used in the wireless communication system 10.
  • FIG. 3 is a diagram showing a configuration example of a radio frame, subframe, and slot used in the radio communication system 10.
  • FIG. 4 is a functional block diagram of the UE 200.
  • FIG. 5 is a functional block diagram of the gNB 100.
  • FIG. 6 is a diagram for explaining configuration example 1.
  • FIG. 7 is a diagram for explaining configuration example 1.
  • FIG. 8 is a diagram for explaining configuration example 1.
  • FIG. 9 is a diagram for explaining configuration example 1.
  • FIG. 10 is a diagram for explaining configuration example 2.
  • FIG. 11 is a diagram for explaining configuration example 2.
  • FIG. 12 is a diagram for explaining configuration example 3.
  • FIG. 13 is a diagram for explaining configuration example 4.
  • FIG. 14 is a diagram showing an example of the hardware configuration of the gNB 100 and the UE 200.
  • FIG. 15 is a
  • the core network 30 includes a network device 300.
  • Network device 300 may include an LMF (Location Management Function).
  • Network device 300 may include an AMF (Access and Mobility management Function).
  • the network device 300 may be an E-SMLC (Evolved Serving Mobile Location Center).
  • the satellite 150 relays the downlink signal received from the NTN gateway 100X to the UE 200. Satellite 150 relays uplink signals received from UE 200 to NTN gateway 100X. Satellite 150 has cell C2 as its coverage area. The satellite 150 may be considered a TRP (Transmission-Reception Point).
  • TRP Transmission-Reception Point
  • the wireless communication system 10 supports multiple frequency ranges (FR).
  • FIG. 2 shows the frequency ranges used in wireless communication system 10.
  • the wireless communication system 10 supports FR1 and FR2.
  • the frequency bands of each FR are as follows.
  • FR1 410 MHz to 7.125 GHz
  • FR2 24.25 GHz to 52.6 GHz
  • SCS Sub-Carrier Spacing
  • BW bandwidth
  • FR2 is at a higher frequency than FR1, with an SCS of 60, or 120kHz (may include 240kHz), and a bandwidth (BW) of 50-400MHz may be used.
  • SCS may also be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.
  • FIG. 3 shows an example of the configuration of radio frames, subframes, and slots used in the radio communication system 10.
  • DM-RS is a type of reference signal and is prepared for various channels.
  • it may mean a DM-RS for a downlink data channel, specifically, a PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • the DM-RS for an uplink data channel, specifically, PUSCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • FIG. 4 is a functional block diagram of the UE 200.
  • the UE 200 includes a radio signal transmission/reception section 210, an amplifier section 220, a modulation/demodulation section 230, a control signal/reference signal processing section 240, an encoding/decoding section 250, a data transmission/reception section 260, and a control section 270. .
  • the amplifier section 220 is composed of a PA (Power Amplifier)/LNA (Low Noise Amplifier), etc.
  • Amplifier section 220 amplifies the signal output from modulation/demodulation section 230 to a predetermined power level. Furthermore, the amplifier section 220 amplifies the RF signal output from the radio signal transmitting/receiving section 210.
  • the control signal/reference signal processing unit 240 executes processing using reference signals (RS) such as Demodulation Reference Signal (DM-RS) and Phase Tracking Reference Signal (PTRS).
  • RS reference signals
  • DM-RS Demodulation Reference Signal
  • PTRS Phase Tracking Reference Signal
  • reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for location information. good.
  • CSI-RS Channel State Information-Reference Signal
  • SRS Sounding Reference Signal
  • PRS Positioning Reference Signal
  • Control channels include a control channel and a data channel.
  • Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel), Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI), and Includes Physical Broadcast Channel (PBCH), etc.
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RACH Random Access Channel
  • DCI Downlink Control Information
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • PBCH Physical Broadcast Channel
  • the value stored in the DCI Format field is an information element that specifies the format of the DCI.
  • the value stored in the CI field is an information element that specifies the CC to which the DCI applies.
  • the value stored in the BWP indicator field is an information element that specifies the BWP to which the DCI is applied.
  • the BWP that can be specified by the BWP indicator is configured by an information element (BandwidthPart-Config) included in the RRC message.
  • the value stored in the FDRA field is an information element that specifies the frequency domain resource to which DCI is applied. Frequency domain resources are identified by the value stored in the FDRA field and the information element (RA Type) included in the RRC message.
  • the encoding/decoding unit 250 performs data division/concatenation, channel coding/decoding, etc. for each predetermined communication destination (gNB 100 or other gNB).
  • the data transmitting and receiving unit 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transceiver 260 transmits PDUs/SDUs in multiple layers (such as a medium access control layer (MAC), a radio link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Perform assembly/disassembly, etc. The data transmitting/receiving unit 260 also performs data error correction and retransmission control based on HARQ (Hybrid Automatic Repeat Request).
  • HARQ Hybrid Automatic Repeat Request
  • FIG. 5 is a functional block diagram of the gNB 100. As shown in FIG. 5, the gNB 100 includes a receiving section 110, a transmitting section 120, and a control section 130.
  • the receiving unit 110 receives various signals from the UE 200.
  • the receiving unit 110 may receive the UL signal via PUCCH or PUSCH.
  • the transmitter 120 transmits various signals to the UE 200.
  • the transmitter 120 may transmit the DL signal via the PDCCH or PDSCH.
  • the receiving unit 110 or the transmitting unit 120 constitutes a communication unit that executes communication of a specific demodulation reference signal (specific DM-RS) in NTN. That is, the receiving section 110 may receive a specific DM-RS (DM-RS of UL), and the transmitting section 120 may transmit a specific DM-RS (DM-RS of DL).
  • a specific DM-RS DM-RS of UL
  • DM-RS of DL DM-RS of DL
  • the control unit 130 controls the gNB 100.
  • the control unit 130 performs channel estimation based on a specific DM-RS (DM-RS of UL), or assumes channel estimation based on a specific DM-RS (DM-RS of DL). Configure the control section.
  • DM-RS of UL a specific DM-RS
  • DM-RS of DL a specific DM-RS
  • N may be predefined in the wireless communication system 10, may be set by RRC (upper layer parameters), or may be specified by MAC CE or DCI. For example, possible values of N may be 2, 4, 6, 12, etc.
  • the N DM-RS-REs may be arranged locally in the DM-RS-REs in the TN, or may be arranged discretely in the DM-RS-REs in the TN.
  • DM-RSconfigurationType is 1
  • NumCDMGroupwithoutData is 1
  • N is 2.
  • the specific DM-RS (For NTN in FIGS. 6 and 7) connects two DM-RS-REs in the TN (For NTN in FIGS. For TN). That is, the density of specific DM-RSs in the frequency direction is lower than the density of DM-RSs in the TN in the frequency direction.
  • the density of the specific DM-RS in the frequency direction is lower than the density of the DM-RS in the TN in the frequency direction, so the power (transmission power) of the specific DM-RS is The power (transmission power) of DM-RS in TN can be increased.
  • Configuration example 2 the density of the specific DM-RS in the frequency direction is lower than the density of the existing DM-RS in the frequency direction.
  • DM-RS is defined by DM-RSconfigurationType, NumCDMGroupwithoutData, whether Transform precoding is enabled, and so on.
  • the specific DM-RS will be explained in comparison with the DM-RS in the TN, taking as an example a case where the existing DM-RS is a DM-RS in the TN.
  • a specific number for example, one or a small number
  • the specific number may be at least less than the number of DM-RS-REs in the TN.
  • No signal may be transmitted in a DM-RS-RE that is not used for transmitting a specific DM-RS.
  • M may be predefined in the wireless communication system 10, may be set by RRC (upper layer parameters), or may be specified by MAC CE or DCI. For example, possible values of M may be 1, 2, 3, etc.
  • the specific DM-RS (For NTN in Figure 10) is selected from among the DM-RS-REs for each of the two PRBs in the TN (For TN in Figure 10). It is transmitted using any two selected DM-RS-REs. That is, the density of specific DM-RSs in the frequency direction is lower than the density of DM-RSs in the TN in the frequency direction.
  • the density of the specific DM-RS in the frequency direction is lower than the density of the DM-RS in the TN, so the power (transmission power) of the specific DM-RS is
  • the power (transmission power) of DM-RS in TN can be increased.
  • the power of the specific DM-RS can be increased to an upper limit of about 6 times compared to the DM-RS in the TN.
  • the power of the specific DM-RS can be increased to an upper limit of about 12 times compared to the DM-RS in the TN.
  • the power of the specific DM-RS can be increased, so the accuracy of channel estimation based on the specific DM-RS can be improved.
  • Configuration example 3 In configuration example 3, a specific DM-RS sequence used in configuration examples 1 and 2 described above will be described. The following alternatives can be considered as the specific DM-RS sequence.
  • DM-RSconfigurationType is 1
  • NumCDMGroupwithoutData is 1
  • N is 2.
  • a sequence mapped to three DM-RS-REs of one PRB used for -RS transmission is transmitted as a specific sequence. If the number of PRBs allocated for transmission is multiple, the sequence mapped to the DM-RS-RE used to transmit a specific DM-RS has a length equal to the number of DM-RS-REs transmitted in multiple PRBs. may be generated.
  • a sequence having the same length as the DM-RS-RE used for transmission of the existing DM-RS in one PRB may be generated as the specific DM-RS sequence.
  • the specific DM-RS sequence may be defined separately from the existing DM-RS sequence, or the existing DM-RS sequence may be used as is.
  • DM-RSconfigurationType is 1
  • NumCDMGroupwithoutData is 1
  • N is 2.
  • an existing DM-RS sequence corresponding to six DM-RS-REs used for existing DM-RS transmission is generated in one PRB,
  • the sequence mapped to the three DM-RS-REs of each PRB used for transmitting the specific DM-RS is transmitted as the specific sequence.
  • the sequence mapped to the DM-RS-RE used for transmitting a specific DM-RS has a length equal to the number of existing DM-RS-REs in multiple PRBs. may be generated.
  • Configuration example 4 In configuration example 4, in configuration examples 1 and 2 described above, the position of the DM-RS-RE used for transmitting the specific DM-RS may be shifted in the time direction.
  • the number of REs that shift in the time direction may be represented by X.
  • X may be predefined in the wireless communication system 10, may be set by RRC (upper layer parameters), or may be specified by MAC CE or DCI. For example, the possible values of X may be 2, 4, 6, 12, etc. Note that this configuration does not need to be defined as a "shift"; for example, the position of the DM-RS-RE used for transmitting a specific DM-RS may be different between symbols.
  • the position of the DM-RS-RE used to transmit the specific DM-RS is It may be shifted by 6RE in the direction.
  • the density of specific DM-RSs in the time direction is higher than the density of existing DM-RSs in the time direction.
  • the density of specific DM-RSs in the time direction may be defined by the number of symbols of specific DM-RSs for each slot. Possible values of the number of symbols of a specific DM-RS for each slot may be 4, 6, 7, 12, 14, etc.
  • the accuracy of channel estimation is improved by increasing the number of symbols of the specific DM-RS. For example, when assuming the movement of 150 satellites, it is effective to increase the number of specific DM-RS symbols.
  • DM-RS-bundling using a specific DM-RS may be used for specific channels other than PUSCH.
  • DM-RS-bundling may also be read as Joint Channel Estimation (hereinafter referred to as JCE).
  • JCE assumes that the transmission power of the specific DM-RS is constant and the phase of the specific DM-RS continues (that is, the transmitter transmits the specific DM-RS to satisfy these), and the receiver This is a technology that performs channel estimation by bundling specific DM-RSs that span the above slots (JCE window).
  • the JCE window may be set for each specific channel, may be set for each link (UL/DL), or may be set for each UE 100.
  • the specific channel may include two or more different channels.
  • the two or more channels may be PDCCH and PDSCH, or may be PUCCH and PUSCH.
  • a specific reference signal other than the specific DM-RS may be used as the DM-RS.
  • the specific reference signal may be an SRS used for demodulating PUSCH. That is, SRS may be used as DM-RS used for demodulating PUSCH.
  • the position of the specific DM-RS in the time direction may be different from the position of the existing DM-RS in the time direction.
  • the location of the specific DM-RS in the time direction may be different from the location of the existing DM-RS in the time direction.
  • Configuration example 8 power amplification of a specific DM-RS may be applied.
  • the power amplification of the specific DM-RS may be associated with the configuration of the specific DM-RS (frequency direction pattern, time direction pattern, frequency direction density, time direction density, etc.).
  • the power amplification of the specific DM-RS may be set independently of the configuration of the specific DM-RS.
  • a specific DM-RS sequence may be newly defined.
  • the maximum number of antenna ports that can transmit a newly defined specific DM-RS sequence may be defined.
  • the maximum number of antenna ports may be expressed as Y.
  • Y may be predefined in the wireless communication system 10, may be set by RRC (upper layer parameters), or may be specified by MAC CE or DCI.
  • RRC upper layer parameters
  • MAC CE MAC CE
  • DCI DCI
  • Configuration example 10 the maximum number of antenna ports supported by a specific DM-RS may be different from the maximum number of antenna ports supported by an existing DM-RS.
  • the maximum number of antenna ports supported for a particular DM-RS may be denoted by Z.
  • Z may be predefined in the wireless communication system 10.
  • Z may be 1.
  • the values of various parameters associated with the number of antenna ports less than or equal to the maximum number of antenna ports may be different between the specific DM-RS and the existing DM-RS.
  • the various parameters may include CDM Group ( ⁇ ), FD-OCC (w_f), TD-OCC (w_t), mapped RE ( ⁇ ), and the like.
  • the table that associates the number of antenna ports with various parameters is the table defined in ⁇ 6.4.1.3 “Precoding and mapping to physical resources” of 3GPP TS38.211 (for example, Table 6.4.1.1 .3-1 etc.). That is, a table different from the table defined in 3GPP TS38.211 may be newly defined as a table related to a specific DM-RS.
  • Configuration example 11 details regarding at least one of the configuration examples 1 to 8 described above may be set and/or instructed by the signal link shown below. Details regarding the configuration example may include whether or not the configuration example is applied, parameters necessary for the configuration example, and the like.
  • two or more alternatives selected from options 1 to 4 may be combined. For example, if only the RRC signaling settings related to option 1 and/or option 2 are used, the signaling overhead regarding a specific DM-RS can be suppressed. When settings by RRC signaling related to Option 1 and/or Option 2 are combined with DCI instructions related to Option 4, flexible control regarding a specific DM-RS can be executed.
  • any two or more configuration examples selected from the above configuration examples 1 to 11 may be combined.
  • the specific DM-RS may be applied to DL or UL.
  • Specific DM-RS are PDSCH, PUSCH, PBCH, PDCCH, PUCCH, Msg.2-PDSCH, MSG.2-PDCCH, Msg.3-PUSCH, Msg.3-PDCCH, Msg.4-PDSCH, Msg.4- It may be applied to one or more channels selected from PDCCH and Msg.4-PUCCH (hereinafter, condition 1).
  • the specific DM-RS may be applied to DM-RS configuration Type 1 without being applied to DM-RS configuration Type 2.
  • the specific DM-RS may be applied to both DM-RS configuration Type 1 and DM-RS configuration Type 2 (hereinafter, condition 5).
  • the specific DM-RS is not applied to the case where it is frequency multiplexed with other signals, and may be applied to the case where it is not frequency multiplexed with other signals.
  • the specific DM-RS may be applied to both the case where it is frequency multiplexed with other signals and the case where it is not frequency multiplexed with other signals (hereinafter, condition 6).
  • the details (parameters, patterns, density, etc.) of the specific DM-RS may differ for each of the above conditions (conditions 1 to 6).
  • a specific DM-RS may be predefined in the wireless communication system 10, may be configured by cell-common signaling, and may be set by the UE. -specific signaling, cell-common signaling, or UE-specific signaling.
  • the applicability of a specific DM-RS may be reported from the UE 200.
  • the specific DM-RS may be supported by the UE 200 that supports NTN of 3GPP Release-18.
  • the UE 200 may newly read the configuration of a specific DM-RS when NTN's TA (Timing Advance) is updated (i.e., the configuration of the specific DM-RS). may receive signaling).
  • NTN's TA Timing Advance
  • the UE 200 may newly read the configuration of the specific DM-RS when the orbit information of the satellite 150 is reacquired in NTN.
  • the configuration of a specific DM-RS may be sent along with satellite ephemeris-related information.
  • the UE Capability shown below may be reported from the UE 200 to the gNB 100.
  • the UE Capability may include an information element indicating whether one or more of the configuration examples selected from configuration examples 1 to 11 described above is supported.
  • the UE Capability may include an information element indicating whether or not one or more of the alternatives and options selected from the above-mentioned alternatives and options is supported.
  • configure, activate, update, indicate, enable, specify, and select may be used interchangeably.
  • link, associate, correspond, and map may be used interchangeably; allocate, assign, and monitor.
  • map may also be read interchangeably.
  • each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices.
  • the functional block may be realized by combining software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, These include, but are not limited to, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. I can't.
  • a functional block (configuration unit) that performs transmission is called a transmitting unit or a transmitter. In either case, as described above, the implementation method is not particularly limited.
  • FIG. 14 is a diagram showing an example of the hardware configuration of the device.
  • the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the word “apparatus” can be read as a circuit, a device, a unit, etc.
  • the hardware configuration of the device may include one or more of the devices shown in the figure, or may not include some of the devices.
  • Each functional block of the device (see FIGS. 4-5) is realized by any hardware element of the computer device or a combination of hardware elements.
  • each function in the device is implemented by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the memory This is realized by controlling at least one of reading and writing data in the storage 1002 and the storage 1003.
  • predetermined software programs
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • programs program codes
  • software modules software modules
  • data etc.
  • the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
  • Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.
  • the memory 1002 is a computer-readable recording medium, and includes at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be done.
  • Memory 1002 may be called a register, cache, main memory, or the like.
  • the memory 1002 can store programs (program codes), software modules, etc. that can execute a method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, such as an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (such as a compact disk, a digital versatile disk, or a Blu-ray disk). (registered trademark disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc.
  • Storage 1003 may also be called auxiliary storage.
  • the above-mentioned recording medium may be, for example, a database including at least one of memory 1002 and storage 1003, a server, or other suitable medium.
  • the communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, network controller, network card, communication module, etc.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 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 for each device.
  • the device includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • processor 1001 may be implemented using at least one of these hardwares.
  • information notification is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
  • information notification can be performed using physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC signaling e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)
  • RRC signaling may also be referred to as RRC messages, such as RRC Connection Setup ) message, RRC Connection Reconfiguration message, etc.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4th generation mobile communication system 4th generation mobile communication system
  • 5th generation mobile communication system 5G
  • 6th generation mobile communication system 6th generation mobile communication system
  • xth generation mobile communication system x is an integer or decimal, for example
  • Future Radio Access FAA
  • New Radio NR
  • W-CDMA registered trademark
  • GSM® CDMA2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi®
  • IEEE 802.16 WiMAX®
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate systems, and next-generation systems expanded based on these.
  • a combination of multiple systems for example, a combination of at least one of LTE and LTE-A with 5G
  • a combination of at least one of LTE and LTE-A with 5G may be applied.
  • the specific operations performed by the base station in this disclosure may be performed by its upper node.
  • various operations performed for communication with a terminal are performed by the base station and other network nodes other than the base station (e.g., MME or It is clear that this could be done by at least one of the following: S-GW, etc.).
  • MME Mobility Management Entity
  • S-GW Serving GW
  • Information, signals can be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.
  • the input/output information may be stored in a specific location (for example, memory) or may be managed using a management table. Information that is input and output can be overwritten, updated, or added. The output information may be deleted. The input information may be sent to other devices.
  • Judgment may be made by a value expressed by 1 bit (0 or 1), by a truth value (Boolean: true or false), or by comparing numerical values (for example, by using a predetermined value). (comparison with a value).
  • notification of prescribed information is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.
  • Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • a transmission medium For example, if the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to When transmitted from a server or other remote source, these wired and/or wireless technologies are included within the definition of transmission medium.
  • wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of
  • At least one of the channel and the symbol may be a signal.
  • the signal may be a message.
  • a component carrier may also be called a carrier frequency, cell, frequency carrier, etc.
  • system and “network” are used interchangeably.
  • radio resources may be indicated by an index.
  • base station BS
  • wireless base station fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • cell refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
  • communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • each aspect/embodiment of the present disclosure may be applied.
  • the mobile station may have the functions that the base station has.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be replaced with side channels.
  • a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe.
  • 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 minislot may be called a TTI.
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing TTI may be called a slot, minislot, etc. instead of a subframe.
  • the TTI may be a unit of transmission time such as a channel-coded data packet (transport block), a code block, or a codeword, or may be a unit of processing such as scheduling or link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.
  • long TTI e.g., normal TTI, subframe, etc.
  • short TTI e.g., shortened TTI, etc.
  • TTI with a time length of less than the long TTI and 1ms. It may also be read as a TTI having a TTI length of the above length.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the newerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on newerology.
  • the time domain of an RB may include one or more symbols, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs can be classified into physical resource blocks (Physical RBs: PRBs), sub-carrier groups (SCGs), resource element groups (Resource Element Groups: REGs), PRB pairs, RB pairs, etc. May be called.
  • Physical RBs Physical RBs: PRBs
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. May be called.
  • a resource block may be composed of one or more resource elements (RE).
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • Bandwidth Part (also called partial bandwidth, etc.) refers to a subset of contiguous common resource blocks for a certain numerology in a certain carrier. good.
  • the common RB may be specified by an RB index based on a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • One or more BWPs may be configured within one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside of the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be replaced with “BWP”.
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • connection means any connection or coupling, direct or indirect, between two or more elements and each other. It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled.”
  • the bonds or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be replaced with "access.”
  • two elements include one or more electrical wires, cables, and/or printed electrical connections, as well as in the radio frequency domain, as some non-limiting and non-inclusive examples. , electromagnetic energy having wavelengths in the microwave and optical (both visible and non-visible) ranges.
  • the phrase “based on” does not mean “based solely on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using the designations "first,” “second,” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed therein or that the first element must precede the second element in any way.
  • (accessing) may include considering something as a “judgment” or “decision.”
  • judgment and “decision” refer to resolving, selecting, choosing, establishing, comparing, etc. as “judgment” and “decision”. may be included.
  • judgment and “decision” may include regarding some action as having been “judged” or “determined.”
  • judgment (decision) may be read as “assuming", “expecting", “considering”, etc.
  • a and B are different may mean “A and B are different from each other.” Note that the term may also mean that "A and B are each different from C”. Terms such as “separate” and “coupled” may also be interpreted similarly to “different.”
  • FIG. 15 shows an example of the configuration of the vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, Equipped with various sensors 2021 to 2029, an information service section 2012, and a communication module 2013.
  • the driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g. GNSS, etc.), map information (e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.) ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors that prevent accidents and reduce the driver's driving burden. It consists of various devices that provide functions for the purpose and one or more ECUs that control these devices. Further, the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
  • GPS Light Detection and Ranging
  • map information e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.
  • gyro systems e.g., IMU (Inertial Measurement Unit), INS (Iner
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, various information is transmitted and received with an external device via wireless communication.
  • Communication module 2013 may be located either inside or outside electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, or the like.
  • a fifth feature is a communication unit that executes communication of a specific demodulation reference signal in a non-terrestrial network, and a communication unit that executes channel estimation based on the specific demodulation reference signal, or
  • the base station is equipped with a control unit that assumes channel estimation according to the present invention, and the specific demodulation reference signal has a configuration different from that of existing demodulation reference signals.
  • a seventh feature is the step of performing communication of a specific demodulation reference signal in a non-terrestrial network, and performing channel estimation based on the specific demodulation reference signal, or performing communication based on the specific demodulation reference signal. and a step of assuming channel estimation, and the specific demodulation reference signal has a configuration different from that of existing demodulation reference signals.

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

Abstract

La présente invention concerne un terminal comprenant une unité de communication qui exécute une communication d'un signal de référence destiné à une démodulation particulière dans un réseau non terrestre, ainsi qu'une unité de commande qui exécute une estimation de canal sur la base du signal de référence destiné à une démodulation particulière ou qui suppose une estimation de canal sur la base du signal de référence destiné à une démodulation particulière. Le signal de référence destiné à une démodulation particulière a une configuration différente de celle d'un signal de référence existant destiné à une démodulation.
PCT/JP2022/023691 2022-06-13 2022-06-13 Terminal, station de base, système et procédé de communication radio WO2023242928A1 (fr)

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PCT/JP2022/023691 WO2023242928A1 (fr) 2022-06-13 2022-06-13 Terminal, station de base, système et procédé de communication radio

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Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Further simulation results on coverage enhancement for NR NTN", 3GPP TSG RAN WG1 #109-E R1-2204915, 29 April 2022 (2022-04-29), XP052144115 *
ZTE: "Discussion on HARQ for NR-NTN", 3GPP TSG RAN WG1 #105-E R1-2105191, 12 May 2021 (2021-05-12), XP052011269 *

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