WO2021220411A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base Download PDF

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Publication number
WO2021220411A1
WO2021220411A1 PCT/JP2020/018147 JP2020018147W WO2021220411A1 WO 2021220411 A1 WO2021220411 A1 WO 2021220411A1 JP 2020018147 W JP2020018147 W JP 2020018147W WO 2021220411 A1 WO2021220411 A1 WO 2021220411A1
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Prior art keywords
srs
srs resource
panel
transmission
resource set
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PCT/JP2020/018147
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English (en)
Japanese (ja)
Inventor
祐輝 松村
聡 永田
ウェイチー スン
シャオツェン グオ
ジン ワン
ギョウリン コウ
Original Assignee
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/JP2020/018147 priority Critical patent/WO2021220411A1/fr
Priority to CN202080100257.8A priority patent/CN115486110A/zh
Publication of WO2021220411A1 publication Critical patent/WO2021220411A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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 reference signal for measurement (Sounding Reference Signal (SRS)) has a wide range of uses.
  • the NR SRS is used not only for uplink (Uplink (UL)) CSI measurement, but also for downlink (Downlink (DL)) CSI measurement, beam management, and the like.
  • the relationship between the SRS and the panel of the user terminal has not been studied so far. Unless this is clarified, the base station cannot understand whether one SRS and another SRS were transmitted using the same panel or different panels. In this case, since the SRS measurement result in the base station cannot be used appropriately, suitable scheduling may not be performed, and communication throughput, communication quality, and the like may deteriorate.
  • UE User Equipment
  • one of the purposes of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately determine the correspondence between the panel and the SRS.
  • the terminal includes a control unit that determines a panel corresponding to a measurement reference signal (Sounding Reference Signal (SRS)) resource set or an SRS resource based on an upper layer parameter, and the determined panel. It has a transmission unit that performs SRS transmission in the SRS resource set or the SRS resource.
  • SRS Sounding Reference Signal
  • the correspondence between the panel and SRS can be appropriately determined.
  • FIG. 1 is a diagram showing an example of spatial relationship information of SRS.
  • 2A and 2B are diagrams showing an example of the correspondence between the SRS resource set and the panel in the 1.1 embodiment.
  • FIG. 3A-3C is a diagram showing an example of the correspondence between the SRS resource and the panel in the 1.2 embodiment.
  • FIG. 4 is a diagram showing an example of setting the SRS resource set in the second embodiment.
  • FIG. 5 is a diagram showing an example of setting the SRS resource in the second embodiment.
  • FIG. 6 is a diagram showing an example of setting the spatial relationship information of SRS in the second embodiment.
  • 7A and 7B are diagrams showing an example of setting the SRS resource set in the combination of the first embodiment and the second embodiment.
  • FIG. 8A and 8B are diagrams showing an example of the assumption of whether or not simultaneous transmission of SRS is possible in the first embodiment.
  • 9A and 9B are diagrams showing an example of the assumption of whether or not simultaneous transmission of SRS is possible in the second embodiment.
  • FIG. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 11 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • FIG. 12 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • FIG. 13 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the reference signal for measurement (Sounding Reference Signal (SRS)
  • SRS Sounding Reference Signal
  • the SRS of NR is used not only for the CSI measurement of the uplink (Uplink (UL)) used in the existing LTE (LTE Rel.8-14), but also for the CSI measurement of the downlink (Downlink (DL)) and the beam. It is also used for management (beam management).
  • the UE may configure one or more SRS resources.
  • SRS resources may be specified by an SRS resource index (SRS Resource Index (SRI)).
  • SRS Resource Index SRI
  • Each SRS resource may have one or more SRS ports (may correspond to one or more SRS ports).
  • the number of ports for each SRS may be 1, 2, 4, or the like.
  • the UE may be set with one or more SRS resource sets (SRS resource sets).
  • SRS resource sets may be associated with a predetermined number of SRS resources.
  • the UE may commonly use higher layer parameters for SRS resources included in one SRS resource set.
  • the resource set in the present disclosure may be read as a set, a resource group, a group, or the like.
  • Information about SRS resources or resource sets may be set in the UE using higher layer signaling, physical layer signaling, or a combination thereof.
  • the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • MAC CE MAC Control Element
  • PDU MAC Protocol Data Unit
  • the broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Minimum System Information
  • OSI Other System Information
  • the physical layer signaling may be, for example, downlink control information (DCI).
  • DCI downlink control information
  • the SRS setting information (for example, "SRS-Config" of the RRC information element) may include SRS resource set setting information, SRS resource setting information, and the like.
  • the SRS resource set setting information (for example, the RRC parameter "SRS-ResourceSet”) includes an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, and SRS. Information on the resource type and the usage of the SRS may be included.
  • the SRS resource type may indicate the behavior of the time domain of the SRS resource setting (same time domain behavior), periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS). (SP-SRS)) or aperiodic SRS (Aperiodic SRS (A-SRS)) may be indicated.
  • the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation).
  • the UE may transmit the A-SRS based on the DCI SRS request.
  • SRS RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse"
  • L1 (Layer-1) parameter "SRS-SetUse” L1 (Layer-1) parameter "SRS-SetUse”
  • BeamManagement beam management
  • codebook codebook
  • non-codebook non-codebook
  • AntennaSwitcing etc.
  • an SRS for codebook or non-codebook use may be used to determine a precoder for codebook-based or non-codebook-based Uplink Shared Channel (PUSCH) transmission based on SRI.
  • PUSCH Uplink Shared Channel
  • the SRS for beam management may be assumed that only one SRS resource for each SRS resource set can be transmitted at a predetermined time instant. If a plurality of SRS resources corresponding to the behavior of the same time domain belong to different SRS resource sets in the same Bandwidth Part (BWP), these SRS resources may be transmitted at the same time.
  • BWP Bandwidth Part
  • the SRS resource setting information (for example, the RRC parameter "SRS-Resource”) includes the SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, the transmission comb, and the SRS resource mapping (for example, time and / or frequency resource). It may include position, resource offset, resource period, number of iterations, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, sequence ID, spatial relation information, and the like.
  • SRS resource ID SRS-ResourceId
  • the SRS resource mapping for example, time and / or frequency resource. It may include position, resource offset, resource period, number of iterations, number of SRS symbols, SRS bandwidth, etc.
  • hopping-related information for example, SRS resource type, sequence ID, spatial relation information, and the like.
  • the UE may switch the Bandwidth Part (BWP) that transmits SRS for each slot, or may switch the antenna.
  • BWP Bandwidth Part
  • the UE may apply at least one of in-slot hopping and inter-slot hopping to SRS transmission.
  • the UE may refer to at least one of the uplink channels and signals (hereinafter, “channel / signal”; hereinafter, “A / B” as well) based on a predetermined spatial relation. , "At least one of A and B") controls the transmission process (eg, at least one of transmission, mapping, precoding, modulation, coding).
  • the spatial relationship may be read as pseudo collocation (Quasi-Co-Location (QCL)), QCL assumption, Transmission Configuration Indication state (TCI state), beam, or the like.
  • QCL Quad-Co-Location
  • TCI state Transmission Configuration Indication state
  • beam or the like.
  • the spatial relationship applied to a predetermined channel / signal may be specified by the spatial relationship information (Spatial Relation Information (SRI)) notified (set) using higher layer signaling.
  • the spatial relationship information of the SRS (for example, the RRC parameter “spatialRelationInfo”) may indicate the spatial relationship information between a predetermined reference signal (Reference Signal (RS)) and the SRS.
  • RS Reference Signal
  • the predetermined reference signal includes a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information-Reference Signal (CSI-RS)), and a measurement reference signal (Sounding Reference Signal (SRS)). It may be at least one of.
  • the SSB may be referred to as a synchronization signal / physical broadcast channel (SS / PBCH) block.
  • FIG. 1 is a diagram showing an example of SRS spatial relation information. This example is described using the Abstract Syntax Notation One (ASN.1) notation (note that this is just an example and is not a complete description).
  • ASN.1 Abstract Syntax Notation One
  • the spatial relationship information of SRS (for example, "SRS-SpatialRelationInfo" of RRC information element (Information Element (IE))) is used as an index of the above-mentioned predetermined reference signal (reference RS (parameter “referenceSignal”)). It may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID.
  • the SSB index, SSB resource ID, and SSB Resource Indicator may be read as each other. Further, the CSI-RS index, the CSI-RS resource ID and the CSI-RS Resource Indicator (CRI) may be read as each other. Further, the SRS index, SRS resource ID and SRI may be read as each other.
  • the SRI to be set may include at least one of the SSB index, the CSI-RS resource ID, and the SRS resource ID as the index of the predetermined RS. Further, the SRI may include a serving cell index corresponding to the above-mentioned predetermined RS, a bandwidth part (BWP) ID, and the like.
  • BWP bandwidth part
  • index, ID, indicator, resource ID, etc. may be read as each other.
  • the UE uses the same spatial domain filter as the spatial domain filter for receiving the SSB or CSI-RS.
  • the SRS resource may be transmitted. That is, in this case, the UE may assume that the SSB or CSI-RS UE receive beam and the SRS UE transmit beam are the same.
  • the UE When the UE sets spatial relationship information about another SRS (reference SRS) and the SRS (target SRS) for one SRS (target SRS) resource, the UE is a spatial domain filter for transmitting the reference SRS.
  • the target SRS resource may be transmitted using the same spatial domain filter as. That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.
  • the spatial domain filter for transmission of the base station may be read as each other.
  • the spatial domain filter for receiving the base station, the uplink spatial domain receive filter, and the receiving beam of the base station may be read as each other.
  • the spatial domain filter for the transmission of the UE, the uplink spatial domain transmission filter (uplink spatial domain transmission filter), and the transmission beam of the UE may be read as each other.
  • the spatial domain filter for receiving the UE, the downlink spatial domain receive filter (downlink spatial domain receive filter), and the received beam of the UE may be read as each other.
  • the spatial relation information may correspond to the beam.
  • the UE may assume that UL transmissions corresponding to different SRIs are transmitted using different beams.
  • the beam instruction for the physical uplink control channel may be set by higher layer signaling.
  • the PUCCH spatial relation information includes one spatial relation information (SpatialRelationInfo) parameter
  • the UE may apply the set parameter to the PUCCH.
  • the PUCCH spatial relation information includes a spatial relation information parameter having more than 1, the parameter to be applied (activated) to the PUCCH may be determined based on the MAC CE.
  • the PUCCH spatial relationship information may be information obtained by replacing SRS with PUCCH in the above-mentioned SRS spatial relationship information, so the description will not be repeated.
  • the beam instruction for PUSCH may be determined based on the SRS Resource Indicator (SRI) field included in DCI.
  • the UE may transmit the PUSCH using the same transmission beam as the corresponding SRS among the SRS set in the upper layer based on the specified SRI.
  • the beam instruction for SRS may be the same.
  • a UE configured for codebook-based PUSCH transmission may determine (select) an SRS resource included in an SRS resource set whose SRS usage corresponds to a codebook based on the SRI field of DCI.
  • a UE configured for non-codebook-based PUSCH transmission may determine (select) an SRS resource included in an SRS resource set whose SRS usage corresponds to a non-codebook based on the SRI field of DCI.
  • the number of SRS resources included in the SRS resource set whose usage corresponds to the codebook and the number of SRS resources included in the SRS resource set whose usage corresponds to the non-codebook may be different, for example, the former There may be two, the latter four, and so on.
  • the SRI field size may be 1 bit for the former, 2 bits for the latter, and so on.
  • Multi-panel Uplink (UL) beam selection for UEs with multiple panels (multipanels) is being considered for future wireless communication systems (eg, Rel.17 NR).
  • the UE can perform DL measurements (eg, DL reference signal measurements) without UL beam sweeping. Based on this, the appropriate UL beam may be determined autonomously.
  • BC Beam Correspondence
  • DL measurements eg, DL reference signal measurements
  • the UE may perform UL beam sweeping.
  • the beam is generally determined autonomously by the UE and used for SRS-based beam sweeping.
  • the SRS for beam management does not have to set / specify spatial information from the base station.
  • the relationship between the SRS and the UE panel has not been studied so far. Unless this is clarified, the base station cannot understand whether one SRS and another SRS were transmitted using the same panel or different panels. In this case, since the SRS measurement result in the base station cannot be used appropriately, suitable scheduling may not be performed, and communication throughput, communication quality, and the like may deteriorate.
  • the present inventors have conceived a method for appropriately carrying out panel-specific SRS transmission.
  • activation, deactivation, instruction, selection, update, decision, etc. may be read as each other. Further, in the present disclosure, sequences, lists, sets, groups, etc. may be read as each other.
  • the panel Uplink (UL) transmission entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, code word, base station, predetermined antenna.
  • Port for example, demodulation reference signal (DMRS) port
  • predetermined antenna port group for example, DMRS port group
  • predetermined group for example, Code Division Multiplexing (CDM)
  • the panel Identifier (ID) and the panel may be read as each other. That is, the TRP ID and TRP, the CORESET group ID and the CORESET group, and the like may be read as each other. The ID and index may be read as each other.
  • the panel of this disclosure may be read as the active panel.
  • the panel IDs of the present disclosure may be read as SRS resource set group IDs, antenna group IDs, other IDs, and the like.
  • the panel ID may be transparent to the base station (gNB). In this case, the base station can know, for example, which SRS resource set is transmitted on the same or different panels.
  • Embodiment 1.1 the above relationship is the relationship between the SRS resource set and the panel.
  • the UE may assume that the SRS resource set and the panel are associated with each other based on the order of the SRS resource set IDs.
  • all SRS resources in a set of SRS resources are associated with the same panel.
  • the i-th k SRS resource set IDs have smaller panel IDs (or larger ones). It may be assumed that it is associated with the i-th panel from the larger one (Embodiment 1.1.1).
  • the value of k may be predetermined by the specifications, may be notified to the UE by higher layer signaling, physical layer signaling, or a combination thereof, or may be determined based on the UE capability.
  • FIG. 2A corresponds to the first embodiment 1.1.1.
  • BM beam management
  • CB codebook
  • NCB non-codebook
  • the SRS resource set ID for other uses may be associated with the panel by the same rule, may be associated with the panel in another way, or may not be associated with the panel.
  • FIG. 2B corresponds to the first embodiment 11.2.
  • the resource type is aperiodic.
  • Embodiment 1.2 the above relationship is the relationship between the SRS resource and the panel.
  • the UE may assume that the SRS resource and the panel are associated with each other based on the order of the SRS resource IDs.
  • the i-th k SRS resource IDs are panels. It may be assumed that the ID is associated with the i-th panel from the smallest (or larger) ID (Embodiment 1.2.1).
  • the value of k may be predetermined by the specifications, may be notified to the UE by higher layer signaling, physical layer signaling, or a combination thereof, or may be determined based on the UE capability.
  • the i-th k SRS resource IDs are associated with the i-th panel from the smallest (or larger) panel ID (Embodiment 1.2.2).
  • a panel ID may be associated with an SRS resource ID contained in an SRS resource set corresponding to the behavior of a different time domain.
  • FIG. 3A corresponds to the first embodiment 1.2.1.
  • FIG. 3B corresponds to the first embodiment 1.2.2.
  • the resource type is aperiodic.
  • FIG. 3C corresponds to the first embodiment 1.2.3.
  • the SRS resource set ID is replaced with the SRS resource set ID corresponding to the activated (or triggered, updated, instructed) SRS resource set. May be good.
  • the P-SRS / SP-SRS resource set may be activated by MAC CE, or the A-SRS resource set may be triggered by DCI.
  • the association between the SRS resource set ID or the SRS resource ID and the panel ID may be a one-to-one mapping.
  • the UE may not expect more SRS resource sets / SRS resource IDs to be set or activated than the number of panels it has.
  • the UE may report the number of panels it has (supports) using the UE capability information.
  • the UE and the base station can appropriately determine the panel corresponding to the SRS transmission.
  • Embodiment 2.1 the above relationship is the relationship between the SRS resource set and the panel.
  • the UE may assume that RRC signaling sets the panel ID associated with the SRS resource set.
  • all SRS resources in a set of SRS resources are associated with the same panel.
  • FIG. 4 is a diagram showing an example of setting the SRS resource set in the second embodiment.
  • Rel. 15 The notation "SRS-ResourceSet-r17" is used as an information element different from the NR SRS resource set setting (RRC information element "SRS-ResourceSet”), but the name is not limited to this.
  • the SRS resource set setting in FIG. 4 includes panel ID information (Panel-ID).
  • the panel ID associated with the SRS resource set is set.
  • the information may be, for example, an integer type.
  • Embodiment 2.2 the above relationship is the relationship between the SRS resource and the panel.
  • the UE may assume that the panel ID associated with the SRS resource is set by RRC signaling.
  • FIG. 5 is a diagram showing an example of setting the SRS resource in the second embodiment.
  • Rel. 15 The notation "SRS-Resource-r17" is used as an information element different from the NR SRS resource setting (RRC information element "SRS-Resource”), but the name is not limited to this.
  • the SRS resource setting in FIG. 5 includes panel ID information (Panel-ID).
  • the panel ID associated with the SRS resource is set.
  • the information may be, for example, an integer type.
  • FIG. 6 is a diagram showing an example of setting the spatial relationship information of SRS in the second embodiment.
  • Rel. 15 The notation "SRS-SpatialRelationInfo-r17" is used as an information element different from the setting of the spatial relation information of SRS of NR (RRC information element "SRS-SpatialRelationInfo”), but the name is not limited to this.
  • the setting of the SRS spatial relation information in FIG. 6 includes the panel ID information (Panel-ID).
  • the panel ID related to the SRS resource is set based on the spatial relationship information associated with the SRS resource.
  • the above relationship is the relationship between the panel and the reference RS (eg, CSI-RS, SSB, SRS) of the spatial relationship information associated with the SRS resource.
  • the reference RS eg, CSI-RS, SSB, SRS
  • the UE may assume that the relationship between the reference RS CSI-RS / SSB and the panel is set (instructed, notified) by RRC signaling / MAC CE / DCI.
  • the UE may transmit the SRS resource using the panel corresponding to the reference RS (CSI-RS / SSB) of the spatial relationship information associated with the SRS resource.
  • the UE may autonomously determine the panel used for receiving the CSI-RS / SSB and report it to the base station.
  • the UE may transmit the SRS resource using the panel determined for the reference RS of the spatial relationship information associated with the SRS resource.
  • the UE may assume that the relationship between the SRS, which is the reference RS, and the panel is set (instructed, notified).
  • the UE may transmit the SRS resource using the panel corresponding to the reference RS (another SRS) of the spatial relationship information associated with the SRS resource.
  • the UE may autonomously determine the panel used for SRS transmission and report it to the base station.
  • the UE may transmit the SRS resource using the panel determined for the reference RS (another SRS) of the spatial relationship information associated with the SRS resource.
  • Embodiment 2.4 is a combination of at least two of embodiments 2.1-2-3.
  • the UE may not expect that different panels will be determined based on the combination of embodiments 2.1-2-3. In this case, the UE may assume that for one SRS resource set / SRS resource, one panel is determined based on any of embodiments 2.1-2-3.
  • the UE may allow different panels to be determined based on the combination of embodiments 2.1-2-3.
  • the UE has one panel based on a certain rule from a plurality of panels determined based on at least one of Embodiments 2.1-2-3 with respect to one SRS resource set / SRS resource. It may be assumed that it will be decided.
  • the UE may use the former or the latter panel when the panel set by the spatial relation information of the SRS of the second embodiment is different from the panel associated with the reference RS of the second embodiment for a certain SRS resource. May be applied to the SRS resource.
  • the above rule may apply the determination methods described in Embodiments 2.1, 2.2, and 2.3 in any order.
  • the UE For example, if there are both a panel setting for the SRS resource set (Embodiment 2.1) and a panel setting for the SRS resource included in the SRS resource set (Embodiment 2.2), the UE , The former or the latter panel may be applied to the SRS resource set / SRS resource.
  • the UE and the base station can appropriately determine the panel corresponding to the SRS transmission.
  • the first embodiment and the second embodiment may be used in combination.
  • the SRS resource set / SRS resource for which the panel ID is explicitly set may follow the second embodiment
  • the SRS resource set / SRS resource for which the panel ID is not explicitly set may follow the first embodiment.
  • the panel ID may be specified according to at least one of the following: (Modification 1) Default setting common to all SRS resource sets / SRS resources, (Modification 2) The order of SRS resource set ID / SRS resource ID.
  • the above default setting (default panel) of the modification 1 may be predetermined by the specifications, may be set by the upper layer signaling, or may be determined based on the UE capability.
  • the default panel may be the panel with the smallest or largest panel ID.
  • the UE has k pieces of SRS resource set IDs / SRS resource IDs for which the panel ID is not explicitly set, arranged in ascending order from the smallest (or larger).
  • the i-th k SRS resource set IDs / SRS resource IDs are associated with the i-th panel from the smallest (or larger) panel ID.
  • FIG. 7A corresponds to the above-mentioned modification 1.
  • FIG. 7B corresponds to the above-mentioned modification 2.
  • the RRC signaling for explicitly setting the panel ID in the second embodiment may be read by MAC CE / DCI for activating (or updating or instructing) the panel ID.
  • the third embodiment relates to UE processing (control of simultaneous transmission of SRS) related to SRS transmission.
  • the third embodiment may be applied when new RRC parameters (eg, multi-panel operation, panel ID described in the second embodiment, etc.) are set in the UE, otherwise Rel. 15 NR operation may be applied.
  • new RRC parameters eg, multi-panel operation, panel ID described in the second embodiment, etc.
  • the operation (assumed) of 15 NR may be at least one of the following: -For beam management applications, it may be assumed that only one SRS resource for each SRS resource set can be transmitted in an instant for a predetermined time. In the same BWP, when a plurality of SRS resources corresponding to the behavior of the same time domain belong to different SRS resource sets, these SRS resources may be transmitted at the same time.
  • the UE transmits the aperiodic SRS resource and the aperiodic Drop the P-SRS / SP-SRS symbol of the part that overlaps with the SRS resource (the part that does not overlap is transmitted).
  • the UE transmits the SP-SRS resource, and the part of the P- that overlaps with the SP-SRS resource. Drop the SRS symbol (send non-overlapping parts).
  • the first embodiment corresponds to the case where the panel for SRS transmission is set / instructed for each SRS resource set as in the 1.1 and 2.1 embodiments.
  • Embodiment 3.1 when the upper layer parameter "usage" is set to beam management, there is only one SRS resource in each of the plurality of SRS sets (SRS resource sets). It may be sent at given instant). On the other hand, SRS resources in different SRS resource sets related to different panels may be transmitted at the same time (Embodiment 3.1.1).
  • Embodiment 3.1 when the upper layer parameter "usage" is set to beam management, only one SRS resource in each of the plurality of SRS sets (SRS resource sets) is transmitted at a certain time instant. May be done. On the other hand, SRS resources in different SRS resource sets that are related to different panels and correspond to the behavior of the same time domain may be transmitted simultaneously (3.1.2).
  • the control of whether or not the simultaneous transmission of SRS is possible is based on Rel. 15 NR is equivalent, but according to the third embodiment, Rel. 15 It is expected that the number of cases where simultaneous transmission is allowed will increase more than NR.
  • 8A and 8B are diagrams showing an example of the assumption of whether or not simultaneous transmission of SRS is possible in the first embodiment.
  • FIG. 8A corresponds to the third embodiment.
  • FIG. 8A shows a case where the SRS resource set # 1 including the SRS resources # 1 to # 5 and the SRS resource set # 2 including the SRS resources # 6 to # 10 are set in the UE.
  • the resource types of SRS resource sets # 1 and # 2 may be the same or different.
  • the UE can transmit only one SRS resource (eg, SRS resources # 1 to # 5) in the same SRS resource set in an instant at a given time (in other words, multiple SRS resources using the same panel). SRS resources cannot be transmitted at the same time).
  • SRS resources # 1 to # 5 the same SRS resource set in an instant at a given time (in other words, multiple SRS resources using the same panel). SRS resources cannot be transmitted at the same time).
  • the UE can simultaneously transmit SRS resources (for example, SRS resources # 1 and # 6) between different SRS resource sets.
  • FIG. 8B corresponds to the third embodiment.
  • SRS resource set # 2 including SRS resource # 6- # 10 and SRS resource set # 3 including SRS resource # 11- # 15 are shown. And is set in the UE.
  • the UE can transmit only one SRS resource (eg, SRS resources # 1 to # 5) in the same SRS resource set in an instant at a given time (in other words, multiple SRS resources using the same panel). SRS resources cannot be transmitted at the same time).
  • SRS resources # 1 to # 5 the same SRS resource set in an instant at a given time (in other words, multiple SRS resources using the same panel). SRS resources cannot be transmitted at the same time).
  • the UE has SRS resources between different SRS resource sets that correspond to the behavior of the same time domain (eg, SRS resources # 1 and # 6 with the same resource type "periodic"). It is assumed that simultaneous transmission is possible.
  • the UE is an SRS resource between different SRS resource sets that do not correspond to the behavior of the same time domain (for example, SRS resource # 1 whose resource type is "periodic" and resource type is "aperiodic". It is assumed that SRS resource # 11 and) cannot be transmitted at the same time.
  • the 3.2 embodiment corresponds to the case where the panel for SRS transmission is set / instructed for each SRS resource as in the 1.2 and 2.2 embodiments.
  • Embodiment 3.2 when the upper layer parameter "usage" is set to beam management, different SRS resources associated with different panels may be transmitted at the same time (Embodiment 3.2.1). ..
  • the "different SRS resource” in Embodiment 3.2 may mean a plurality of different SRS resources whose use is included in any SRS resource set of beam management.
  • 9A and 9B are diagrams showing an example of the assumption of whether or not simultaneous transmission of SRS is possible in the second embodiment.
  • FIG. 9A corresponds to the third embodiment.
  • FIG. 9A shows a case where the SRS resource set # 1 including the SRS resources # 1 to # 4 and the SRS resource set # 2 including the SRS resources # 6 to # 9 are set in the UE.
  • the resource types of SRS resource sets # 1 and # 2 may be the same or different.
  • the UE can simultaneously transmit a plurality of SRS resources (for example, SRS resources # 1 to # 4) related to different panels.
  • the UE cannot simultaneously transmit a plurality of SRS resources (for example, SRS resources # 1 and # 6) related to the same panel.
  • FIG. 9B corresponds to the third embodiment.
  • SRS resource set # 1 including SRS resource # 1- # 4
  • SRS resource set # 2 including SRS resource # 6- # 9
  • SRS resource set # 3 including SRS resource # 11- # 14
  • the UE can simultaneously transmit a plurality of SRS resources (for example, SRS resources # 1 to # 4) related to different panels.
  • the UE is an SRS resource between different panels that have the same time domain behavior (eg, an SRS resource # 1 associated with panel # 1 that has the same "periodic" resource type).
  • SRS resource # 7 related to panel # 2) is assumed to be capable of simultaneous transmission.
  • the UE has SRS resources between different panels that do not correspond to the behavior of the same time domain (for example, SRS resource # 6 whose resource type is “periodic” and is related to panel # 1 and resource type is "aperiodic". It is assumed that the SRS resource # 12 which is "target” and is related to the panel # 2) cannot be transmitted at the same time.
  • the UE and the base station can appropriately determine which panel can transmit at the same time.
  • the UE may report information about the number of panels of the UE as UE capability.
  • the information about the number of panels in the UE may indicate at least one such as the number of SRS resource sets, the number of SRS resources, the number of different spatial relationships that can be used at the same time, and so on.
  • the number of panels may be smaller than that of all the panels included in the UE.
  • the panel may be a panel configured on the UE (eg, notified of the panel ID), an activated panel, or associated with an activated SRS resource set / SRS resource. It may be a panel to be used.
  • the "panel" in each of the above embodiments may be read as an activated panel, an active panel, and the like.
  • 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. 10 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 (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs).
  • 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).
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC -UTRA Dual Connectivity
  • 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.
  • 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.
  • the Master Information Block (MIB) may be transmitted by the PBCH.
  • 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 for PDCCH detection.
  • 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 for example.
  • Uplink Control Information (UCI) including at least one of SR) may be transmitted.
  • 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. 11 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 conversion, 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 transmission unit and the reception 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 the upper layer parameter for determining the measurement reference signal (Sounding Reference Signal (SRS)) resource set or the panel corresponding to the SRS resource to the user terminal 20.
  • SRS Sounding Reference Signal
  • the transmission / reception unit 120 may receive the SRS transmitted by the user terminal 20 in the SRS resource set or the SRS resource using the determined panel.
  • FIG. 12 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-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.
  • control unit 210 may determine a panel corresponding to the measurement reference signal (Sounding Reference Signal (SRS)) resource set or the SRS resource based on the upper layer parameter.
  • the upper layer parameter may include an SRS resource set ID, an SRS resource ID, SRS spatial relationship information, a panel ID, and the like.
  • the transmission / reception unit 220 may perform SRS transmission in the SRS resource set or the SRS resource using the determined panel.
  • the control unit 210 may determine the correspondence between the SRS resource set and the panel based on the order of the SRS resource set ID whose use is beam management.
  • the control unit 210 may assume that SRS resources in different SRS resource sets related to different panels can be transmitted at the same time.
  • the control unit 210 may assume that different SRS resources related to different panels can be transmitted at the same time.
  • each functional block is realized by using one physically or logically connected device, or directly or indirectly (for example, two or more physically or logically separated devices). , 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, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 13 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, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), 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 terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
  • channels, symbols and signals may be read interchangeably.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
  • the component carrier Component Carrier (CC)
  • CC Component Carrier
  • 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 transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver 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.
  • the mini-slot may also 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, minislots, 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 numerology 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 channel / signal 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 within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • 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 other names, 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, functions, 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, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted 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”).
  • the upstream channel, the downstream 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)" of "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.
  • connection are any direct or indirect connections or connections 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”.

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

Abstract

Terminal selon un aspect de la présente invention comprenant : une unité de commande qui détermine, sur la base d'un paramètre de couche supérieure, un ensemble de ressources de signal de référence de sondage (SRS) ou un panneau correspondant à une ressource de SRS ; et une unité de transmission qui utilise le panneau déterminé pour réaliser une transmission de SRS dans l'ensemble de ressources de SRS ou dans la ressource de SRS. Selon un aspect de la présente invention, la correspondance entre un panneau et un SRS peut être décidée de manière appropriée.
PCT/JP2020/018147 2020-04-28 2020-04-28 Terminal, procédé de communication sans fil et station de base WO2021220411A1 (fr)

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WO2023095289A1 (fr) * 2021-11-26 2023-06-01 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil et station de base

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WO2023095288A1 (fr) * 2021-11-26 2023-06-01 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil et station de base
WO2023095289A1 (fr) * 2021-11-26 2023-06-01 株式会社Ｎｔｔドコモ Terminal, procédé de communication sans fil et station de base

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