WO2021161540A1 - Terminal, procédé de communication radio et station de base - Google Patents

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

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Publication number
WO2021161540A1
WO2021161540A1 PCT/JP2020/005910 JP2020005910W WO2021161540A1 WO 2021161540 A1 WO2021161540 A1 WO 2021161540A1 JP 2020005910 W JP2020005910 W JP 2020005910W WO 2021161540 A1 WO2021161540 A1 WO 2021161540A1
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WIPO (PCT)
Prior art keywords
csi
transmission
resources
scrambling
information
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PCT/JP2020/005910
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English (en)
Japanese (ja)
Inventor
祐輝 松村
聡 永田
ナディサンカ ルパシンハ
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株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2020/005910 priority Critical patent/WO2021161540A1/fr
Priority to CN202080096674.XA priority patent/CN115104357A/zh
Publication of WO2021161540A1 publication Critical patent/WO2021161540A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
  • LTE Long Term Evolution
  • 5G 5th generation mobile communication system
  • 5G + plus
  • NR New Radio
  • 3GPP Rel.15 3GPP Rel.15 or later, etc.
  • the user terminal (User Equipment (UE)) is a UL data channel (eg, Physical Uplink Shared Channel (PUSCH)) and a UL control channel (eg, Physical Uplink).
  • PUSCH Physical Uplink Shared Channel
  • UCI Uplink Control Information
  • PUCCH Physical Uplink Control Channel
  • CSI-reference signal In a wireless communication system (for example, Rel.15 NR), a plurality of channel state information (CSI) -reference signal (RS) is time division multiplexing (TDM). It is multiplexed with each other using at least one of frequency division multiplexing (FDM) and code division multiplexing (CDM), and each is transmitted using a plurality of CSI-RS ports.
  • FDM frequency division multiplexing
  • CDM code division multiplexing
  • the accuracy of measurement (estimation, tracking) will decrease due to the interference of multiple CSI-RSs transmitted in the same resource element (RE). If the measurement accuracy of CSI-RS is lowered, the system performance may be lowered.
  • one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that enhance the measurement accuracy of CSI-RS.
  • the terminal receives setting information for using different channel state information (CSI) -reference signal (RS) sequences among a plurality of resources, and each of the plurality of resources has a CSI-. It has an RS port, a code division multiplexing (CDM) group, and a cell, which is a receiving unit, and a control unit that performs measurement using a plurality of CSI-RS sequences based on the setting information.
  • CSI channel state information
  • CDM code division multiplexing
  • the measurement accuracy of CSI-RS can be improved.
  • FIG. 1 is a diagram showing an example of an existing slot and a CSI-RS position in the RB.
  • FIG. 2A-2D is a diagram showing an example of FD-OCC and TD-OCC.
  • FIG. 3 is a diagram showing an example of CSI-RS positions for each number of ports.
  • FIG. 4 is a diagram showing an example of mapping of CSI-RS of 32 ports.
  • FIG. 5 is a diagram showing an example of a CDM group.
  • FIG. 6 is a diagram showing an example of the CSI-RS position in the slot and the RB.
  • 7A and 7B are diagrams showing an example of the association between the PN sequence sample and the CDM group.
  • FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 9 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • FIG. 10 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • FIG. 11 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • CSI-RS CSI-RS Rel.
  • the multi-port CSI-RS is multiplexed using at least one of frequency division multiplexing (FDM), time division multiplexing (TDM), and code division multiplexing (CDM (frequency domain OCC, time domain OCC)).
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • CDM code division multiplexing
  • NS time domain OCC
  • the multi-port CSI-RS is used, for example, for orthogonalizing the multi-input multi-output (MIMO) layer.
  • MIMO multi-input multi-output
  • different DMRS ports are configured for each layer.
  • different DMRS ports are set for each layer in one UE and for each UE.
  • the CSI-RS supports up to 32 ports by at least one of the time domain OCC and the frequency domain OCC (up to 4 in the time direction, up to 2 in the frequency direction), FDM, TDM.
  • DL RS for at least one of channel state information (CSI) acquisition, beam management (BM), beam failure recovery (BFR), and fine tracking of time and frequency.
  • CSI-RS is used.
  • the CSI-RS supports 1, 2, 4, 8, 12, 16, 24, and 32 ports (antenna port, CSI-RS port).
  • CSI-RS supports periodic, semi-persistent, and aperiodic transmissions.
  • the frequency density of the CSI-RS can be set to adjust the overhead and CSI estimation accuracy.
  • FIG. 1 is a diagram showing an example of a CSI-RS location in a slot.
  • Each row in the table includes row number, number of ports, frequency domain density, CDM type, time and frequency (time / frequency) position (component resource (CDM group) position (k bar, l bar)), CDM group index.
  • Each resource position ((RE, symbol), (k', l')) in the component resource is shown.
  • the time / frequency position is the position of the CSI-RS time and frequency resource (component resource) corresponding to one port.
  • the k bar is a notation in which "k" is overlined.
  • the k-bar indicates the start resource element (RE) index of the component resource
  • the l-bar indicates the start symbol (OFDM symbol) index of the component resource.
  • CDM groups include no CDM (no CDM, N / A), FD-CDM2, CDM4, and CDM8.
  • the FD-CDM2 multiplexes the two-port CSI-RS at the same time and frequency by multiplying the frequency domain (FD) -orthogonal cover code (OCC) of length 2 in RE units (FD2). ).
  • CDM4 multiplexes 4-port CSI-RS at the same time and frequency by multiplying FD-OCC of length 2 and time domain (TD) -OCC of length 2 in RE unit symbol units (FD2TD2). .
  • the CDM8 multiplexes 8-port CSI-RS at the same time and frequency by multiplying the length 2 FD-OCC and the length 4 TD-OCC in units of RE units and symbols (FD2TD4).
  • FIG. 2A-2D is a diagram showing an example of FD-OCC and TD-OCC.
  • the FD-OCC series is represented by w f (k')
  • the TD-OCC series is represented by w t (k').
  • FIG. 2A shows the case where the CDM type is no CDM.
  • FIG. 2B shows the case where the CDM type is FD-CDM2.
  • FIG. 2C shows the case where the CDM type is CDM4.
  • FIG. 2D shows the case where the CDM type is CDM8.
  • FIG. 3 is a diagram showing an example of CSI-RS positions for each number of ports based on FIG. 1. This figure shows the frequency density, component resource size (frequency direction size [RE], time direction size [symbol]), and CDM type for each number of ports.
  • frequency direction size [RE] frequency direction size [RE]
  • time direction size [symbol] time direction size [symbol]
  • FIG. 4 shows an example of CSI-RS resource element (RE) mapping in which the number of ports is 32 and the component resource size is set to 2 subcarriers ⁇ 2 symbols (row index 17 in FIG. 1).
  • PRB physical resource block
  • 4 component resources of 2 subcarriers x 2 symbols are multiplexed in the frequency domain (frequency division multiplexing (FDM)), and 2 in the time domain.
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • CSI-RSs are multiplexed (code division). It is multiplexed (CDM) (CDM4, FD2TD2). Therefore, 32 ports of CSI-RS are transmitted in the resource of 1 PRB ⁇ 1 slot.
  • the UE assumes that all CSI-RS resources in the resource set are set to the same starting RB, the same number of RBs, and the same CDM type.
  • NZP-CSI-RS is used for time / frequency tracking, CSI calculation, L1-RSRP / SINR calculation, and mobility.
  • NZP-CSI-RS The sequence generation for NZP-CSI-RS is based on the pseudo-random (Pseudo-Random, pseudo-noise, Pseudo-Noise (PN)) sequence defined by the following equation.
  • c (n) is defined by:
  • N C 1600.
  • the second m series x 2 (n) is initialized by c init. c init depends on where the series is applied.
  • the pseudo-random sequence generator for the CSI-RS sequence r (m) is initialized at the start of each OFDM symbol by init of the following equation.
  • n s and f ⁇ are slot numbers in the radio frame.
  • l is the OFDM symbol number in the slot.
  • n ID is equal to the scrambling ID parameter (upper layer parameter scramblingID) or sequence generation configuration parameter (upper layer parameter sequenceGenerationConfig).
  • n symb slot is the number of symbols per slot.
  • the UE assumes that the sequence r (m) is mapped to the resource elements (RE) (k, l) p, ⁇ according to the following equation.
  • the condition is that the resource elements (k, l) p, ⁇ are in the resource block occupied by the CSI-RS resource in which the UE is configured.
  • ⁇ is given by the CSI-RS-ResourceMapping Information Element (IE) or the higher layer parameter density in CSI-RS-CellMobility IE.
  • the number of ports X is given by the upper layer parameter nrofPorts.
  • k is the index (position) of the frequency domain (subcarrier) with respect to the reference point.
  • l is the index (position) of the time domain (symbol) with respect to the reference point.
  • p is the antenna port index.
  • ⁇ is the subcarrier interval setting.
  • ⁇ CSIRS is the power offset specified by the upper layer parameter powerControlOffsetSS in NZP-CSI-RS-Resource IE if provided.
  • w f (k') is the FD-OCC associated with the CDM group.
  • w t (l') is the TD-OCC associated with the CDM group.
  • r l, ns, f ⁇ (m') is the PN sequence initialized in the symbol l of slots n s, f ⁇ .
  • k' is the RE sub-carrier index within the CDM group.
  • l' is the symbol index of RE in the CDM group.
  • N sc RB is the number of subcarriers per RB.
  • the RE position of CSI-RS is common between cells. Even if a different scrambling ID is set for each cell, inter-series interference (inter-cell interference) of CSI-RS may increase. Generally, it is assumed that the interference of CSI-RS between cells is low, and CSI-RS is mapped to the same RE among a plurality of cells. Even if different scrambling IDs are set between a plurality of cells, cell-to-cell interference occurs because the finite-length PN sequence is not orthogonal (not an orthogonal sequence, a pseudo-orthogonal sequence, or a non-completely orthogonal sequence).
  • the generated PN sequence is common to all ports.
  • the measurement accuracy will decrease due to the interference of multiple CSI-RS series transmitted in the same RE in this way. If the measurement accuracy of CSI-RS is lowered, the system performance may be lowered.
  • the present inventors have conceived a method of reducing the interference between a plurality of CSI-RSs transmitted in a resource having the same time / frequency.
  • a / B" and “at least one of A and B” may be read as each other.
  • the cell, the component carrier (CC), the carrier, the bandwidth portion (BWP), and the band may be read as each other.
  • the index, the ID, the indicator, and the resource ID may be read as each other.
  • the RRC parameter, the upper layer parameter, the RRC information element (IE), and the RRC message may be read as each other.
  • the port, the CSI-RS port, and the antenna port may be read as each other.
  • CSI-RS resources, CSI-RS settings, time and frequency resources for CSI-RS may be read interchangeably.
  • the scrambling ID, scrambling ID, sequence generation setting, sequenceGenerationConfig, cell ID, pseudo cell ID, virtual cell ID, and nID may be read as each other.
  • resources, CDM groups, CSI-RS ports, cells, parameters, indexes may be read interchangeably.
  • the CDM group may be a plurality of CSI-RS resources orthogonalized by at least one of the time domain OCC and the frequency domain OCC in the same RE.
  • measurement, estimation, calculation, CSI calculation, tracking, L1-RSRP / SINR calculation and mobility, channel estimation may be read as each other.
  • the UE may measure CSI-RS to which at least one of the following embodiments is applied.
  • a resource-specific PN sequence may be generated for a plurality of resources. Different PN sequences may be generated among multiple resources.
  • Different scrambling IDs may be assigned to multiple resources.
  • a resource-specific init is determined by this scrambling ID, and a resource-specific PN sequence may be generated.
  • Embodiment 1-1 For the CDM group, a CDM group-specific PN sequence may be generated. Different PN sequences may be generated among multiple CDM groups.
  • Different scrambling IDs may be assigned to the plurality of CDM groups.
  • the scrambling ID may determine a CDM group-specific init and generate a CDM group-specific PN sequence.
  • the UE may determine the scrambling ID for the CSI-RS series according to one of the following scrambling ID determination methods 1 and 2.
  • the scrambling ID information (scramblingID) for each CDM group may be set by the RRC parameter.
  • the UE may identify the scrambling ID unique to each CDM group based on the scrambling ID information (scramblingID) given to the CSI-RS resource and the specific parameter x. For example, as shown in FIG. 6, the scrambling ID offset y i may be added to the table of FIG. The specific parameter x may be the number of ports. A scrambling ID offset y i may be associated with the CDM group i. The UE identifies the scrambling ID offset y i for each CDM group based on the specific parameter x, and adds y i to the set scrambling ID information to determine the scrambling ID unique to the CDM group. You may.
  • at least some CSI-RS ports can increase the probability of using the CSI-RS series, which has a low correlation with the CSI-RS series of adjacent cells.
  • Embodiment 1-2 A PN sequence of CSI-RS ports may be generated for the CSI-RS port (antenna port). Different PN sequences may be generated between multiple CSI-RS ports.
  • Different scrambling IDs may be assigned to multiple CSI-RS ports.
  • the scrambling ID may determine a CSI-RS port-specific init and generate a CSI-RS port-specific PN sequence.
  • the UE may determine the scrambling ID for the CSI-RS series according to one of the following scrambling ID determination methods 1 and 2.
  • the scrambling ID information (scramblingID) for each CSI-RS port may be set by the RRC parameter.
  • the UE may identify the scrambling ID unique to each CSI-RS port based on the scrambling ID information (scramblingID) given to the CSI-RS resource and the specific parameter x. For example, the scrambling ID offset y i may be added to the table of FIG.
  • the specific parameter x may be the number of ports.
  • a scrambling ID offset y i may be associated with the CSI-RS port i.
  • the UE identifies the scrambling ID offset y i for each CSI-RS port based on the specific parameter x, and adds y i to the set scrambling ID information to scramble unique to the CSI-RS port.
  • the ring ID may be determined.
  • the association between the PN sequence sample index and the CDM group is common to all cells.
  • the association between the PN sequence sample index and the CDM group may be different among a plurality of cells. This association may be specified in the specification or set by RRC parameters.
  • the PN sequence sample indexes associated with one CDM group may be contiguous or non-contiguous (or evenly spaced).
  • the association between the PN sequence sample index and the CSI-RS port may be different among a plurality of cells. This association may be specified in the specification or set by RRC parameters.
  • the PN sequence sample indexes associated with one CSI-RS port may be contiguous or non-contiguous (may be evenly spaced).
  • the mapping of the PN sequence sample index to RE may be different among a plurality of cells. This mapping may be specified in the specification or set by RRC parameters.
  • a sample in which a plurality of cells have different indexes from the PN sequence may be used.
  • a cell-specific value f (x cell ) may be added to the PN sequence sample index m'.
  • the PN sequence sample index m' may be expressed by the following equation.
  • f (x cell ) may be a scrambling ID.
  • f (x cell ) may be the CSI-RS port index.
  • f (x cell ) may be the CDM group index of CSI-RS.
  • Multiple scrambling IDs may be set by RRC parameters.
  • the number of scrambling IDs may be 2 or any other number.
  • the plurality of scrambling IDs may be a scrambling ID list.
  • One of a plurality of set scrambling IDs may be instructed (switched) based on the downlink control information (DCI) that triggers the A-CSI-RS or A-CSI report.
  • DCI downlink control information
  • the scrambling ID instruction based on DCI may be a new field added in a new release, a replacement (interpretation) of an existing field, or an implicit instruction.
  • the implied indication may be based on at least one of the first Control Channel Element (CCE) index, the first PRB index, and the first RE index of the PDCCH carrying the DCI.
  • CCE Control Channel Element
  • the UE assumes that a new field exists if multiple scrambling IDs (a specific number of scrambling IDs) are set for the CSI-RS resource, otherwise there is no new field (new field size). Is 0 bit).
  • Multiple scrambling IDs may be set for each of the plurality of resources.
  • the UE may determine one scrambling ID for each resource based on the DCI.
  • the UE may determine different scrambling IDs among the plurality of resources according to the first embodiment.
  • Multiple scrambling IDs may be set for each CDM group.
  • Multiple scrambling IDs may be set for each CSI-RS port.
  • the scrambling ID can be dynamically changed, and the CSI series can be changed according to the situation of interference.
  • the UE may report that it supports at least one of the functions described in the first to third embodiments by means of the UE capability information.
  • a UE that reports that it supports a function may apply the function.
  • UEs that have not reported support for the feature are referred to as Rel. 15 operations may be performed.
  • the UE can operate appropriately according to the capability.
  • wireless communication system Wireless communication system
  • communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
  • FIG. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
  • the radio communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
  • -UTRA Dual Connectivity (NE-DC) may be included.
  • the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
  • the base station (gNB) of NR is MN
  • the base station (eNB) of LTE (E-UTRA) is SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
  • a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
  • NR-NR Dual Connectivity NR-DC
  • gNB NR base stations
  • the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
  • the user terminal 20 may be connected to at least one of the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
  • CA Carrier Aggregation
  • DC dual connectivity
  • CC Component Carrier
  • Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
  • the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
  • FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
  • the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
  • the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 via another base station 10 or directly.
  • the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
  • a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple. Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the wireless access method may be called a waveform.
  • another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
  • the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
  • downlink shared channels Physical Downlink Shared Channel (PDSCH)
  • broadcast channels Physical Broadcast Channel (PBCH)
  • downlink control channels Physical Downlink Control
  • Channel PDCCH
  • the uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • the uplink control channel Physical Uplink Control Channel (PUCCH)
  • the random access channel shared by each user terminal 20 are used.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
  • PDSCH User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
  • User data, upper layer control information, and the like may be transmitted by the PUSCH.
  • MIB Master Information Block
  • PBCH Master Information Block
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
  • DCI Downlink Control Information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • the PDSCH may be read as DL data
  • the PUSCH may be read as UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect PDCCH.
  • CORESET corresponds to a resource that searches for DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
  • One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set.
  • the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
  • channel state information (Channel State Information (CSI)
  • delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
  • scheduling request (Scheduling Request () Uplink Control Information (UCI) including at least one of SR)
  • the PRACH may transmit a random access preamble to establish a connection with the cell.
  • downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
  • the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • DeModulation Demodulation reference signal
  • Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
  • SS, SSB and the like may also be called a reference signal.
  • a measurement reference signal Sounding Reference Signal (SRS)
  • a demodulation reference signal DMRS
  • UL-RS Uplink Reference Signal
  • UE-specific Reference Signal UE-specific Reference Signal
  • FIG. 9 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
  • the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
  • this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
  • the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
  • the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
  • the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
  • the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog transform, and other transmission processing.
  • IFFT inverse fast Fourier transform
  • the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
  • the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
  • the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmission / reception unit 120 may perform measurement on the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
  • the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 110.
  • the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
  • the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the transmission / reception unit 120 may transmit setting information for generating different channel state information (CSI) -reference signal (RS) sequences among a plurality of resources.
  • CSI channel state information
  • RS reference signal
  • Each of the plurality of resources may be either a CSI-RS port, a code division multiple access (CDM) group, or a cell.
  • the control unit 110 may generate a plurality of CSI-RS sequences based on the setting information.
  • FIG. 10 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
  • the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
  • this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
  • the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
  • the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
  • the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • RLC layer processing for example, RLC retransmission control
  • MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
  • Whether or not to apply the DFT process may be based on the transform precoding setting.
  • the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
  • the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
  • the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
  • the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
  • the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmission / reception unit 220 may perform measurement on the received signal.
  • the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
  • the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 210.
  • the transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.
  • the transmission / reception unit 220 receives setting information for using different channel state information (CSI) -reference signal (RS) sequences among the plurality of resources, and each of the plurality of resources has a CSI-RS port and a code. It may be either a time division multiplexing (CDM) group or a cell.
  • the control unit 210 may perform measurement using a plurality of CSI-RS sequences based on the setting information.
  • the setting information may include different scrambling IDs for the plurality of resources.
  • the plurality of CSI-RS sequences may be based on the different scrambling IDs.
  • the setting information may include specific parameters for CSI-RS resources.
  • the control unit 210 may determine different scrambling IDs for the plurality of resources based on the specific parameters.
  • the plurality of CSI-RS sequences may be based on the different scrambling IDs.
  • the setting information may include a plurality of scrambling IDs.
  • the control unit 210 may determine one scrambling ID from the plurality of scrambling IDs based on the downlink control information.
  • the plurality of CSI-RS sequences may be based on the one scrambling ID.
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the method of realizing each of them is not particularly limited.
  • the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 11 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the base station 10 and the user terminal 20 described above may be physically 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 hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
  • the processor 1001 may be mounted by one or more chips.
  • the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, 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, a register, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission / reception unit 120 220
  • the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, such as at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • 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, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
  • 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 the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the wireless frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
  • the subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
  • SCS subcarrier Spacing
  • TTI Transmission Time Interval
  • a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.).
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may be a time unit based on numerology.
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. A minislot may consist of a smaller number of symbols than the slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
  • one subframe may be called TTI
  • a plurality of consecutive subframes may be called TTI
  • one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
  • Physical RB Physical RB (PRB)
  • SCG sub-carrier Group
  • REG resource element group
  • the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained in a slot, the number of symbols and RBs contained in a slot or minislot, and the number of RBs.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
  • the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
  • the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.
  • DCI downlink control information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB master information block
  • SIB system information block
  • MAC medium access control
  • the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
  • the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the terms “system” and “network” used in this disclosure may be used interchangeably.
  • the “network” may mean a device (eg, a base station) included in the network.
  • precoding "precoding weight”
  • QCL Quality of Co-Co-Location
  • TCI state Transmission Configuration Indication state
  • space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
  • Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
  • Base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission point (Transmission Point (TP))
  • RP Reception point
  • TRP Transmission / Reception Point
  • Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
  • Communication services can also be provided by Head (RRH))).
  • RRH Head
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (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 to the configuration.
  • the user terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • an uplink channel, a downlink channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • the operation performed by the base station may be performed by its upper node (upper node) in some cases.
  • various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
  • Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
  • each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG xG (xG (x is, for example, integer, fraction)
  • Future Radio Access FAA
  • RAT New -Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • LTE 802.11 Wi-Fi®
  • LTE 802.16 WiMAX®
  • LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios. It may be applied to a system using a communication method, a next-generation system extended based on these, and the like.
  • UMB Ultra-WideBand
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
  • determining used in this disclosure may include a wide variety of actions.
  • judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
  • judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)” such as “accessing” (for example, accessing data in memory).
  • judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
  • the "maximum transmission power" described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal UE maximum transmit power, or may mean the rated maximum transmission power (the). It may mean rated UE maximum transmit power).
  • connection are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
  • the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.

Landscapes

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

Abstract

Un terminal selon un aspect de la présente invention comprend: une unité de réception qui reçoit une information de réglage pour utiliser des séquences de signal de référence (RS) d'information d'état de canal différent (CSI) parmi une pluralité de ressources, chacune de la pluralité de ressources étant soit un port de signal CSI-RS, soit un groupe de multiplexage par répartition de code (CDM), soit une cellule; et une unité de commande qui effectue une mesure au moyen de la pluralité de séquences de signal CSI-RS sur la base de l'information de réglage. Selon un aspect de la présente invention, la précision du signal CSI-RS peut être améliorée.
PCT/JP2020/005910 2020-02-14 2020-02-14 Terminal, procédé de communication radio et station de base WO2021161540A1 (fr)

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PCT/JP2020/005910 WO2021161540A1 (fr) 2020-02-14 2020-02-14 Terminal, procédé de communication radio et station de base
CN202080096674.XA CN115104357A (zh) 2020-02-14 2020-02-14 终端、无线通信方法以及基站

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022215143A1 (fr) * 2021-04-05 2022-10-13 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil et station de base
EP4120643A4 (fr) * 2020-03-12 2023-11-29 Ntt Docomo, Inc. Terminal, procédé de communication sans fil, et station de base

Citations (2)

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Publication number Priority date Publication date Assignee Title
US20190074886A1 (en) * 2017-08-11 2019-03-07 Lg Electronics Inc. Method for transmitting and receiving reference signal and apparatus therefor
JP2020501393A (ja) * 2017-10-31 2020-01-16 エルジー エレクトロニクス インコーポレイティド 無線通信システムでシーケンスの初期値を決定するための方法及びそのための装置

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US20190074886A1 (en) * 2017-08-11 2019-03-07 Lg Electronics Inc. Method for transmitting and receiving reference signal and apparatus therefor
JP2020501393A (ja) * 2017-10-31 2020-01-16 エルジー エレクトロニクス インコーポレイティド 無線通信システムでシーケンスの初期値を決定するための方法及びそのための装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4120643A4 (fr) * 2020-03-12 2023-11-29 Ntt Docomo, Inc. Terminal, procédé de communication sans fil, et station de base
WO2022215143A1 (fr) * 2021-04-05 2022-10-13 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil et station de base

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