WO2022215206A1 - 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
WO2022215206A1
WO2022215206A1 PCT/JP2021/014812 JP2021014812W WO2022215206A1 WO 2022215206 A1 WO2022215206 A1 WO 2022215206A1 JP 2021014812 W JP2021014812 W JP 2021014812W WO 2022215206 A1 WO2022215206 A1 WO 2022215206A1
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Prior art keywords
srs
field
triggering
information
value
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PCT/JP2021/014812
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English (en)
Japanese (ja)
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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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Priority to PCT/JP2021/014812 priority Critical patent/WO2022215206A1/fr
Priority to JP2023512584A priority patent/JPWO2022215206A1/ja
Publication of WO2022215206A1 publication Critical patent/WO2022215206A1/fr

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    • 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
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present 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 successor systems for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later
  • 5G 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • NR New Radio
  • UE user equipment
  • UL data channels eg, Physical Uplink Shared Channel (PUSCH)
  • PUSCH Physical Uplink Shared Channel
  • UCI Physical Uplink Uplink control information
  • the NR SRS is used not only for Uplink (UL) CSI measurement, but also for Downlink (DL) CSI measurement, beam management, and the like.
  • one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that flexibly control SRS triggering.
  • a terminal includes a receiving unit that receives first downlink control information including a first field related to a request for a sounding reference signal, and a resource set corresponding to the value of the field, using the sounding reference and a control unit for controlling signal transmission, and the minimum value of the field corresponds to a resource set of 1 or more.
  • SRS triggering can be flexibly controlled.
  • FIG. 1 is a diagram illustrating an example of SRS resource set configuration.
  • FIG. 2 is a diagram illustrating an example of association between SRS request fields and SRS resource sets.
  • FIG. 3 is a diagram showing an example of a DCI format for SRS triggering.
  • 4A and 4B are diagrams illustrating examples of associations between SRS request fields and SRS resource sets for each DCI format.
  • FIG. 5 is a diagram showing another example of the DCI format for SRS triggering.
  • 6A and 6B are diagrams showing another example of association between SRS request fields and SRS resource sets for each DCI format.
  • FIG. 7 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment.
  • FIG. 1 is a diagram illustrating an example of SRS resource set configuration.
  • FIG. 2 is a diagram illustrating an example of association between SRS request fields and SRS resource sets.
  • FIG. 3 is a diagram showing an example of a DCI format for SRS triggering.
  • FIG. 8 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
  • FIG. 10 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
  • SRS measurement reference signal
  • NR SRS is used not only for uplink (Uplink (UL)) CSI measurement, which is also used in existing LTE (LTE Rel. 8-14), but also for downlink (Downlink (DL)) CSI measurement, beam It is also used for beam management.
  • UL Uplink
  • DL Downlink
  • a UE may be configured with one or more SRS resources.
  • An SRS resource may be identified 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 per SRS may be 1, 2, 4, and so on.
  • a UE may be configured with one or more SRS resource sets.
  • One SRS resource set may be associated with a predetermined number of SRS resources.
  • a UE may commonly use higher layer parameters for SRS resources included in one SRS resource set. Note that the resource set in the present disclosure may be read as set, resource group, group, or the like.
  • Information about SRS resources or resource sets may be configured in the UE using higher layer signaling, physical layer signaling or a combination thereof.
  • higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( It may be Other System Information (OSI).
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI System Information
  • Physical layer signaling may be, for example, downlink control information (DCI).
  • DCI downlink control information
  • the SRS configuration information (for example, "SRS-Config" of the RRC information element) may include SRS resource set configuration information, SRS resource configuration information, and the like.
  • SRS resource set configuration information (for example, "SRS-ResourceSet” of the RRC parameter) includes an SRS resource set identifier (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, SRS It may include resource type (resourceType) and information on SRS usage (usage).
  • the SRS resource type may indicate the same time domain behavior of SRS resource configuration, such as Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS)) or aperiodic SRS (A-SRS)).
  • P-SRS Periodic SRS
  • SP-SRS Semi-Persistent SRS
  • A-SRS aperiodic SRS
  • 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 usage of RRC parameter, "SRS-SetUse” of L1 (Layer-1) parameter
  • beam management beam management
  • codebook codebook
  • NCB non-codebook
  • antenna switching etc.
  • SRS for codebook or non-codebook applications may be used to determine precoders for codebook-based or non-codebook-based Physical Uplink Shared Channel (PUSCH) transmission based on SRI.
  • PUSCH Physical Uplink Shared Channel
  • SRS for beam management applications may assume that only one SRS resource for each SRS resource set can be transmitted at a given time instant. Note that in the same Bandwidth Part (BWP), if multiple SRS resources corresponding to the same time domain behavior belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.
  • BWP Bandwidth Part
  • SRS resource configuration information includes SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission Comb, SRS resource mapping (for example, time and/or frequency resource location, resource offset, resource period, repetition number, SRS symbol number, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information, etc.
  • the UE may switch the Bandwidth Part (BWP) that transmits the SRS for each slot, or may switch the antenna. Also, the UE may apply at least one of intra-slot hopping and inter-slot hopping to SRS transmission.
  • BWP Bandwidth Part
  • A-SRS triggering Rel.
  • A-SRS is triggered by the SRS request field in DCI.
  • A-SRS resource trigger is a DCI codepoint, and the UE transmits SRS according to the corresponding SRS resource set.
  • the A-SRS Resource Trigger List is an additional list of DCI codepoints.
  • Existing SRS requests are made with DCI format 0_1 or 1_1 and involve at least one of data scheduling and CSI triggering. If DCI is allowed to be used only for SRS requests, at least one DCI field for data scheduling and CSI triggering can be reused. For example, the flexibility of SRS triggering can be increased by increasing the size of the SRS request and using it to indicate time/frequency/orthogonal cover code (OCC)/cyclic shift resources for SRS.
  • OCC time/frequency/orthogonal cover code
  • This DCI format may be a UE-specific DCI format.
  • This DCI format may be a new DCI format without at least one of data scheduling and CSI triggering.
  • the new DCI format has the same size as the DCI format for A-SRS triggering with at least one of data scheduling and CSI triggering (eg, existing DCI format, DCI format 0_1). may have.
  • the new DCI format may be a DCI format that does not use some fields of the existing DCI format (some fields of the existing DCI format are set to invalid values or special values).
  • a radio network temporary identifier that scrambles the cyclic redundancy check (CRC) of the DCI, a special value for one or more special fields in the DCI, and a new DCI field if set by the RRC IE (e.g., DCI format indicator ) is added, the UE may determine (distinguish) whether the DCI format including the SRS request includes at least one of data scheduling and CSI triggering.
  • RRC radio network temporary identifier
  • SRS resources a DCI format that does not include at least one of data scheduling and CSI triggering triggers. For example, it is not clear to which SRS resource the value of the SRS request field in a DCI format that does not include data scheduling and/or CSI triggering is associated. If the triggered SRS resource is not clear, there is a risk of lowering measurement accuracy, lowering communication quality, and the like.
  • A/B and “at least one of A and B” may be read interchangeably.
  • cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, band may be read interchangeably.
  • index, ID, indicator, and resource ID may be read interchangeably.
  • RRC, RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings may be read interchangeably.
  • supporting, controlling, controllable, operating, and capable of operating may be read interchangeably.
  • sequence, list, set and group may be read interchangeably.
  • mapping, association, relationship, and table may be read interchangeably.
  • activate, update, indicate, enable, and specify may be read interchangeably.
  • higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( It may be Other System Information (OSI).
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI System Information
  • trigger, request, and schedule may be read interchangeably.
  • DCI and DCI format may be read interchangeably.
  • the first DCI, special DCI, new DCI, Rel. 17 and later DCI, UE-specific DCI, DCI for SRS request, DCI for SRS transmission, DCI for SRS request only, DCI with SRS request and without PUSCH scheduling and CSI request, with SRS and without PUSCH and CSI DCI, DCI that triggers SRS transmission and is not used for PUSCH scheduling and CSI requests, DCI without data scheduling/CSI triggering, DCI without data scheduling and CSI triggering, without data scheduling/CSI triggering DCI for SRS triggering may be read interchangeably.
  • the second DCI normal DCI, existing DCI, Rel. 15/16 DCI, UE-specific DCI, DCI for PUSCH scheduling/CSI request, DCI with SRS request and with PUSCH scheduling and CSI request, DCI with SRS and with PUSCH/CSI, trigger SRS transmission and DCI used for PUSCH scheduling/CSI request, DCI with data scheduling/CSI triggering, and DCI for SRS triggering with data scheduling/CSI triggering may be interchanged.
  • the SRS request field and the first field in the first DCI may be read interchangeably.
  • the SRS request field and the second field in the second DCI may be read interchangeably.
  • the value of the first field, the value of the SRS request field, the code point of the SRS request field, the SRS triggering state, and the A-SRS resource trigger may be read interchangeably.
  • the SRS resource set, SRS-ResourceSet, SRS positioning resource set, and SRS-PosResourceSet may be read interchangeably.
  • data scheduling, time/frequency resource allocation, UL grant/DL assignment, PUSCH/PDSCH scheduling, effective value for data scheduling may be read interchangeably.
  • CSI triggering, CSI request, report triggering, and valid values for CSI triggering may be read interchangeably.
  • UE-specific DCI, individual DCI, new DCI format, and at least one of DCI formats 0_1, 0_2, 1_1, 1_2, and 2_3 may be read interchangeably.
  • the size of the UE-specific DCI format without data scheduling/CSI triggering may be equal to or different from the size of the UE-specific DCI format with data scheduling/CSI triggering.
  • the UE may receive the first DCI including the field regarding the SRS request, and use the SRS resource set corresponding to the value of the field to control the transmission of SRS.
  • a DCI with a UE-specific DCI format for SRS triggering without data scheduling/CSI triggering may always trigger SRS.
  • a UE that receives a UE-specific DCI format for SRS triggering without data scheduling/CSI triggering may always transmit SRS.
  • the SRS request field with value 00 may be used to indicate the SRS resource set. All of the multiple values of the SRS request field in the UE-specific DCI format without data scheduling/CSI triggering may be associated with multiple SRS resource sets, respectively. Setting the SRS triggering state (A-SRS resource trigger) value 0 for the SRS resource set (SRS triggering state set to 0) may be supported.
  • the size of the SRS request field in the UE-specific DCI format without data scheduling/CSI triggering is the size of the SRS request field in the UE-specific DCI format with data scheduling/CSI triggering (second DCI format). may be equal to
  • SRS triggering can be increased in UE-specific DCI formats without data scheduling/CSI triggering.
  • one or more SRS resource sets may be set to an SRS triggering state of value 4.
  • the value 0 of the SRS request field may correspond to the fourth SRS resource set (SRS resource set with SRS triggering state value 4).
  • SRS resource set As shown in the example of FIG. 4A, in UE-specific DCI format with data scheduling/CSI triggering, an SRS request field with value 00 does not trigger SRS.
  • SRS resource set As shown in the example of FIG. SRS resource set, as shown in the example of FIG. SRS resource set) may be triggered.
  • FIG. 4B shows an example in which SRS triggering state values 4, 1, 2, and 3 correspond in the order of SRS request field values 00, 01, 10, and 11, respectively. Accordingly, in the SRS request field value other than 00, UE-specific DCI with data scheduling/CSI triggering and UE-specific DCI without data scheduling/CSI triggering mean the same SRS triggering state value. Therefore, the operation of the UE can be simplified.
  • SRS triggering state values 1, 2, 3, and 4 may correspond to SRS request field values 00, 01, 10, and 11, respectively. This simplifies the specifications/operations regarding the correspondence relationship between the SRS request field value and the SRS triggering state value in the UE-specific DCI format without data scheduling/CSI triggering shown in FIG. 4B.
  • the correspondence between the value of the SRS request field in the UE-specific DCI format without data scheduling/CSI triggering and the value of the SRS triggering state may be defined in the specification or set by higher layer signaling. .
  • the minimum value of the SRS request field may correspond to the SRS triggering state of value M.
  • M may be 2 ⁇ N.
  • M may be the maximum number of SRS triggering states (maxNrofSRS-TriggerStates). The maximum number of SRS triggering states may be defined in the specification or set by higher layer signaling.
  • the values 1 to M-1 of the SRS request field may correspond to the values 1 to M-1 of the SRS triggering state, respectively.
  • Some or all bits of the unused field in the UE-specific DCI format without data scheduling/CSI triggering are added to the SRS request field to reduce the size of the SRS request field, as shown in the example of FIG. (number of bits) may be larger than the size of the SRS request field in the UE specific DCI format with data scheduling/CSI triggering.
  • the size of the SRS request field may be 3 bits or larger.
  • the lowest value of the SRS request field may correspond to the highest value of the SRS triggering state.
  • the association between SRS request fields and SRS resource sets may differ between UE-specific DCI formats with data scheduling/CSI triggering and UE-specific DCI formats without data scheduling/CSI triggering. .
  • the SRS request field in the UE-specific DCI format with data scheduling/CSI triggering may be 2 bits, as shown in the example of FIG. 6A.
  • four values of the SRS request field may be associated with no trigger and three SRS resource sets (three values of no trigger and SRS triggering state), respectively.
  • the SRS request field size may be 3 bits in the UE-specific DCI format without data scheduling/CSI triggering, as shown in the example of FIG. 6B.
  • 8 values of the SRS request field may be respectively associated with 8 SRS resource sets (8 values of SRS triggering state).
  • a value of 0 in the SRS request field may correspond to the eighth SRS resource set (the SRS resource set with the SRS triggering state value of 8).
  • the values 1 through 7 of the SRS request field may correspond to the 1st through 7th SRS resource sets (SRS resource sets with SRS triggering state values 1 through 7), respectively.
  • SRS triggering state values 8, 1, 2, 3, 4, 5, 6, and 7 are displayed in the order of SRS request field values 000, 001, 010, 011, 100, 101, 110, and 111. are corresponding examples. Accordingly, for values of the SRS request field other than 000, UE-specific DCI with data scheduling/CSI triggering and UE-specific DCI without data scheduling/CSI triggering mean the same SRS triggering state value. Therefore, the operation of the UE can be simplified.
  • the correspondence between the SRS request field value and the SRS triggering state value may be changed from the above.
  • SRS triggering state values 1, 2, 3, 4, 5, 6, 7, and 8 correspond to SRS request field values 000, 001, 010, 011, 100, 101, 110, and 111, respectively. may This simplifies the specifications/operations regarding the correspondence relationship between the SRS request field value and the SRS triggering state value in the UE-specific DCI format without data scheduling/CSI triggering shown in FIG. 6B.
  • the correspondence between the value of the SRS request field in the UE-specific DCI format without data scheduling/CSI triggering and the value of the SRS triggering state may be defined in the specification or set by higher layer signaling. .
  • the 4th to 8th SRS resource sets may be used only for UE-specific DCI formats without data scheduling/CSI triggering.
  • UE-specific DCI formats without data scheduling/CSI triggering can properly trigger SRS resources.
  • the first embodiment may be applied to a UE-specific DCI format (second DCI format) with data scheduling/CSI triggering.
  • DCI with UE-specific DCI format for SRS triggering without data scheduling/CSI triggering may always trigger SRS.
  • a UE that receives a UE-specific DCI format for SRS triggering with data scheduling/CSI triggering may always transmit SRS.
  • the existing DCI format with data scheduling/CSI triggering and the DCI format always triggering SRS with data scheduling/CSI triggering consist of a RNTI that scrambles the CRC of the DCI and a special value of one or more special fields. , that a new DCI field (eg, DCI format indicator) is added if set by the RRC IE.
  • a new DCI field eg, DCI format indicator
  • UE-specific DCI formats with data scheduling/CSI triggering can properly trigger SRS resources.
  • RRC IEs Higher layer parameters/UE capabilities corresponding to features in at least one embodiment above may be defined.
  • UE capabilities may indicate support for this feature.
  • a UE for which a higher layer parameter corresponding to that function (enabling that function) is set may perform that function. It may be defined that "UEs for which upper layer parameters corresponding to the function are not set shall not perform the function (for example, according to Rel. 15/16)".
  • a UE reporting UE capabilities indicating that it supports that function may perform that function. It may be specified that "a UE that does not report UE capabilities indicating that it supports the feature shall not perform that feature (eg according to Rel. 15/16)".
  • a UE may perform a function if it reports a UE capability indicating that it supports the function, and the higher layer parameters corresponding to the function are configured. "If the UE does not report a UE capability indicating that it supports the function, or if the upper layer parameters corresponding to the function are not set, the UE does not perform the function (e.g., according to Rel. 15/16 ) may be defined.
  • UE capabilities may indicate whether to support UE-specific DCI for A-SRS triggering without data scheduling/CSI triggering (eg, DCI format 0_1).
  • the UE capability may indicate whether a value of 0 in the SRS request field supports triggering the SRS resource set (first embodiment).
  • the UE capability may indicate whether to support an SRS triggering state value of 0 (that the SRS triggering state value of 0 is set for the SRS resource set).
  • the UE capability may indicate whether or not the SRS request field (variant 1) of 2 bits or more is supported.
  • the UE can implement the above functions while maintaining compatibility with existing specifications.
  • wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
  • communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
  • FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to one 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 the Third Generation Partnership Project (3GPP). .
  • LTE Long Term Evolution
  • 5G NR 5th generation mobile communication system New Radio
  • 3GPP Third Generation Partnership Project
  • the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • LTE Evolved Universal Terrestrial Radio Access
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC NR-E -UTRA Dual Connectivity
  • the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between multiple base stations within 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.
  • dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
  • gNB NR base stations
  • a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
  • a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
  • the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
  • the user terminal 20 may connect to at least one of the multiple base stations 10 .
  • the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
  • CA carrier aggregation
  • CC component carriers
  • DC dual connectivity
  • Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
  • Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
  • FR1 may be a frequency band below 6 GHz (sub-6 GHz)
  • FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
  • the user terminal 20 may communicate 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
  • a plurality of base stations 10 may be connected by wire (for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 directly or via another base station 10 .
  • the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
  • a radio access scheme based on orthogonal frequency division multiplexing may be used.
  • OFDM orthogonal frequency division multiplexing
  • 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
  • a radio access method may be called a waveform.
  • other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
  • the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
  • a downlink shared channel Physical Downlink Shared Channel (PDSCH)
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
  • PUSCH uplink shared channel
  • PUCCH uplink control channel
  • PRACH Physical Random Access Channel
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
  • User data, higher layer control information, and the like may be transmitted by PUSCH.
  • a Master Information Block (MIB) may be transmitted by the PBCH.
  • Lower layer control information may be transmitted by the PDCCH.
  • the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for 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.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
  • CORESET corresponds to a resource searching for DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates.
  • a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces 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. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
  • PUCCH channel state information
  • acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • SR scheduling request
  • a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
  • downlink, uplink, etc. may be expressed without adding "link”.
  • various channels may be expressed without adding "Physical" to the head.
  • synchronization signals SS
  • downlink reference signals DL-RS
  • the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • DMRS Demodulation reference signal
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
  • SS, SSB, etc. may also be referred to as reference signals.
  • DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
  • FIG. 8 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • the base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
  • One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.
  • this example mainly shows the functional blocks that characterize 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 unit described below may be omitted.
  • the control unit 110 controls the base station 10 as a whole.
  • the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
  • the control unit 110 may control transmission/reception, measurement, etc. 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, etc., and transfer them to the transmission/reception unit 120 .
  • the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
  • the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
  • the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
  • the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field 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 configured from a transmission unit and a reception unit.
  • the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
  • the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
  • the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control for example, HARQ retransmission control
  • the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
  • channel coding which may include error correction coding
  • modulation modulation
  • mapping mapping
  • filtering filtering
  • DFT discrete Fourier transform
  • DFT discrete Fourier transform
  • the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
  • the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
  • the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
  • FFT Fast Fourier transform
  • IDFT Inverse Discrete Fourier transform
  • the transmitting/receiving unit 120 may measure the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
  • the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • RSSI Received Signal Strength Indicator
  • channel information for example, CSI
  • the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
  • the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission line interface 140.
  • the transmitting/receiving unit 120 may transmit first downlink control information (DCI) including a first field (for example, an SRS request field, a new field) regarding a request for a sounding reference signal (SRS).
  • DCI downlink control information
  • the control unit 110 may control reception of the sounding reference signal using a resource set (SRS resource set) corresponding to the value of the field.
  • SRS resource set a resource set corresponding to the value of the field.
  • the lowest value (eg, 0) of the field may correspond to one or more resource sets.
  • FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
  • the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
  • One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
  • this example mainly shows the functional blocks of the features of 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 unit described below may be omitted.
  • the control unit 210 controls the user terminal 20 as a whole.
  • the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on 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, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
  • the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
  • the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
  • the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
  • the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on 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 configured from a transmission unit and a reception unit.
  • the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
  • the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
  • the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
  • the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , 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 and control information acquired from the control unit 210, for example , HARQ retransmission control
  • the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
  • Whether or not to apply DFT processing may be based on transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding is enabled, the above to transmit the channel using the DFT-s-OFDM waveform
  • the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
  • the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
  • the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
  • the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmitting/receiving section 220 may measure the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
  • the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
  • the measurement result may be output to control section 210 .
  • the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
  • the transmitting/receiving section 220 may receive the first downlink control information including the first field regarding the request for the sounding reference signal.
  • the control unit 210 may control transmission of the sounding reference signal using a resource set (SRS resource set) corresponding to the value of the field.
  • SRS resource set a resource set corresponding to the value of the field.
  • the lowest value (eg, 0) of the field may correspond to one or more resource sets.
  • the first downlink control information may not include information on data scheduling and information on triggering of channel state information reporting.
  • the minimum value may correspond to the maximum state value for the resource set.
  • the size of the first field may be larger than the size of the second field regarding the request in the second downlink control information.
  • the second downlink control information may further include at least one of information on scheduling of data and information on triggering of channel state information reporting.
  • each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
  • a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 10 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
  • the base station 10 and 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 each device shown in the figure, or may be configured without some devices.
  • processor 1001 may be implemented by one or more chips.
  • predetermined software program
  • the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
  • the processor 1001 operates an operating system and controls 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 device, registers, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission/reception unit 120 220
  • FIG. 10 FIG. 10
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
  • the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
  • the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
  • a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
  • the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives 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. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a signal may also be a message.
  • a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
  • a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may consist of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
  • a subframe may consist of one or more slots in the time domain.
  • a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may also be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a 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 may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the 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 called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
  • the number of subcarriers included in an RB may be determined based on neumerology.
  • an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
  • One TTI, one subframe, etc. may each be configured with one or more resource blocks.
  • One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
  • PRB Physical Resource Block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair RB Also called a pair.
  • a resource block may be composed of one or more resource elements (Resource Element (RE)).
  • RE resource elements
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP for UL
  • BWP for DL DL BWP
  • One or multiple BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
  • the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
  • Information, signals, etc. may be input and output through multiple 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 and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
  • Uplink Control Information (UCI) Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • MAC signaling may be notified using, for example, a MAC Control Element (CE).
  • CE MAC Control Element
  • notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information by notice of
  • the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
  • a “network” may refer to devices (eg, base stations) included in a network.
  • precoding "precoding weight”
  • QCL Quality of Co-Location
  • TCI state Transmission Configuration Indication state
  • spatialal patial relation
  • spatialal 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 interchangeable. can be used as intended.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
  • a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
  • RRH Head
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
  • MS Mobile Station
  • UE User Equipment
  • 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. , a handset, a user agent, a mobile client, a 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 a mobile object, the mobile object itself, or the like.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and 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 as a user terminal.
  • communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
  • the user terminal 20 may have the functions of the base station 10 described above.
  • words such as "uplink” and “downlink” may be replaced with words corresponding to communication between terminals (for example, "sidelink”).
  • uplink channels, downlink channels, etc. may be read as sidelink channels.
  • user terminals in the present disclosure may be read as base stations.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • 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, an integer or a decimal number)
  • 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
  • IEEE 802.11 Wi-Fi®
  • IEEE 802.16 WiMAX®
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, or other suitable wireless It may be applied to systems using communication methods, next-generation systems extended based on these, and the like. Also, multiple systems may be applied to systems using communication methods, next-generation systems extended based on these, and the like
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
  • determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
  • determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determining (determining)” may be regarded as “determining (determining)” some action.
  • Maximum transmit power described in this disclosure may mean the maximum value of transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).
  • connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner 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 divulgation comprend : une unité de réception qui reçoit des premières informations de liaison descendante comprenant un premier champ qui concerne une demande de signal de référence de sondage ; et une unité de commande qui utilise un ensemble de ressources correspondant à la valeur du champ pour commander la transmission du signal de référence de sondage, la valeur minimale du champ correspondant à un ou plusieurs ensembles de ressources. En raison d'un aspect de la présente divulgation, le déclenchement de SRS peut être commandé de manière flexible.
PCT/JP2021/014812 2021-04-07 2021-04-07 Terminal, procédé de communication sans fil, et station de base WO2022215206A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210006370A1 (en) * 2018-04-03 2021-01-07 Vivo Mobile Communication Co., Ltd. Sounding reference signal transmission and configuration methods, user equipment, and network side device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210006370A1 (en) * 2018-04-03 2021-01-07 Vivo Mobile Communication Co., Ltd. Sounding reference signal transmission and configuration methods, user equipment, and network side device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LENOVO, MOTOROLA MOBILITY: "Enhancements on SRS", 3GPP DRAFT; R1-2008914, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 24 October 2020 (2020-10-24), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051946726 *
NTT DOCOMO, INC: "Discussion on SRS enhancement", 3GPP DRAFT; R1-2009179, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051946884 *

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