WO2019211917A1 - Terminal d'utilisateur et dispositif de station de base - Google Patents

Terminal d'utilisateur et dispositif de station de base Download PDF

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Publication number
WO2019211917A1
WO2019211917A1 PCT/JP2018/017562 JP2018017562W WO2019211917A1 WO 2019211917 A1 WO2019211917 A1 WO 2019211917A1 JP 2018017562 W JP2018017562 W JP 2018017562W WO 2019211917 A1 WO2019211917 A1 WO 2019211917A1
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WIPO (PCT)
Prior art keywords
search space
information
user terminal
signal
resource
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PCT/JP2018/017562
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English (en)
Japanese (ja)
Inventor
高橋　秀明
一樹 武田
浩樹 原田
知也 小原
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2018/017562 priority Critical patent/WO2019211917A1/fr
Publication of WO2019211917A1 publication Critical patent/WO2019211917A1/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
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Definitions

  • the present disclosure relates to a user terminal and a radio base station in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-patent Document 1 LTE Advanced, LTE Rel. 10, 11, 12, 13
  • LTE Rel. 8, 9 LTE Advanced, LTE Rel. 10, 11, 12, 13
  • LTE successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel.
  • a radio base station for example, eNB (eNode B)
  • eNB eNode B
  • a physical layer control signal for example, downlink control information (DCI: Downlink Control Information)
  • DCI Downlink Control Information
  • UE User Equipment
  • a control channel for example, PDCCH (Physical Downlink Control Channel)
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • a user terminal in a handover procedure, performs SIB (System Information Block) 1 and OSI (Other in the handover destination cell (target cell).
  • SIB System Information Block
  • OSI OSI
  • Search space information information on search space for random access
  • the search space information may be included in setting information (PDCCH-ConfigCommon) of a downlink control channel (for example, PDCCH: Physical Downlink Control Channel) unique to the target cell.
  • PSCell Primary Secondary Cell
  • SCell Secondary Cell
  • DC or Carrier Aggregation At least one of the additional procedures can occur.
  • the present invention has been made in view of such a point, and a user terminal and a radio that can appropriately set a search space in at least one of a handover destination cell, a cell added by DC, and a cell added by CA
  • One of the purposes is to provide a base station.
  • a user terminal includes a receiving unit that receives setting information related to a downlink control channel during at least one of a handover procedure and a cell addition procedure in dual connectivity or carrier aggregation, and the setting information And a control unit that controls the setting of each search space in the search space set based on information about the search space set associated with each reference signal resource included.
  • a search space can be appropriately set in at least one of a handover destination cell, a cell added by DC, and a cell added by CA.
  • FIG. 1 is a conceptual diagram illustrating an example of PDCCH-ConfigCommon.
  • FIG. 2 is a conceptual diagram illustrating an example of RACH-ConfigDedicated.
  • FIG. 3 is a diagram illustrating an example of PDCCH-ConfigCommon according to the first aspect.
  • FIG. 4 is a diagram illustrating an example of RACH-ConfigDedicated according to the second mode.
  • FIG. 5 is a diagram illustrating an example of RACH-ConfigDedicated according to the second mode.
  • FIG. 6 is a diagram illustrating an example of RACH-ConfigDedicated according to the second mode.
  • FIG. 7 is a diagram illustrating an example of PDCCH-ConfigCommon according to the second aspect.
  • FIG. 8 is a diagram showing an example of a schematic configuration of the radio communication system according to the present embodiment.
  • FIG. 9 is a diagram illustrating an example of the overall configuration of the radio base station according to the present embodiment.
  • FIG. 10 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment.
  • FIG. 11 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • FIG. 12 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 13 is a diagram illustrating an example of a hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • wireless base stations for example, BS.
  • DCI downlink control information
  • BS wireless base stations
  • TRP Transmission / Reception Point
  • eNB eNodeB
  • gNB NR NodeB
  • CORESET COntrol REsource SET
  • the CORESET is an allocation candidate area of a downlink control channel (for example, PDCCH (Physical Downlink Control Channel)).
  • the CORESET may include a predetermined frequency domain resource and a time domain resource (for example, 1 or 2 OFDM symbols).
  • PDCCH or DCI is mapped to a predetermined resource unit in CORESET.
  • the predetermined resource unit includes, for example, a control channel element (CCE: Control Channel Element), a CCE group including one or more CCEs, and a resource element group (REG: Resource Element) including one or more resource elements (RE: Resource Element). Group), one or more REG bundles (REG group), and at least one physical resource block (PRB).
  • CCE Control Channel Element
  • CCE group including one or more CCEs
  • REG Resource Element
  • Group resource elements
  • REG group Resource Element
  • PRB physical resource block
  • the user terminal monitors (blind decoding) DCI mapped to a predetermined resource unit in CORESET (or search space in CORESET), and detects DCI for the user terminal.
  • the user terminal sets configuration information on PDCCH specific to the cell. (Also referred to as PDCCH-ConfigCommon, common PDCCH information, etc.).
  • PDCCH-ConfigCommon is added at the handover destination cell (target cell, primary cell (PCell: Primary Cell)), primary secondary cell (PSCell: Primary Secondary Cell) added by DC, and DC or CA.
  • target cell primary cell
  • PSCell Primary Secondary Cell
  • DC or CA DC or CA.
  • Configuration information related to PDCCH specific to at least one secondary cell SCell: Secondary Cell.
  • FIG. 1 is a conceptual diagram showing an example of PDCCH-ConfigCommon.
  • PDCCH-ConfigCommon includes a predetermined number (for example, a maximum of 2) of CORESET information (also referred to as commonControlResourcesSets, commonCoReSets, common CORESET information, etc.), and a predetermined number (for example, a maximum of 4) search spaces.
  • CORESET information also referred to as commonControlResourcesSets, commonCoReSets, common CORESET information, etc.
  • Information also referred to as commonSearchSpaces, commonSearchSpaces, common search space information, etc.
  • the PDCCH-ConfigCommon may include information on the following search spaces (for example, search space identifier (ID, searchSpaceID)).
  • Information related to search space for SCI search space for SIB1 for scheduling PDSCH that transmits SIB1 (System Information Block 1) (also called search space information for searchSpaceSIB1, rmsi-SearchSpace, SIB1, etc.)
  • Information related to DCI monitoring search space search space for OSI
  • Information related to DCI monitoring search space (search space for OSI) that schedules PDSCH for transmitting OSI (Other System Information) (also referred to as searchSpaceOtherSystemInformation, OSI search space information, etc.)
  • Information related to DCI monitoring search space (search space for paging) for scheduling PDSCH for transmitting paging also called pagingSearchSpace, search space information for paging, etc.
  • Search space for monitoring DCI for scheduling PDSCH for transmitting random access (RA) procedure messages for example, random access response (message 2), collision resolution message (
  • the user terminal is based on the search space information (for example, search space ID) for SIB1, OSI, paging, and RA (for example, ID of the search space), information on time position (for example, PDCCH (DCI)).
  • search space information for example, search space ID
  • OSI for SIB1
  • paging for example, ID of the search space
  • RA for example, ID of the search space
  • time position for example, PDCCH (DCI)
  • RA procedure for example, at least one of a target cell, PSCell, SCell
  • a network for example, radio base station (gNB: gNodeB)
  • a user terminal for example, one or more random access preambles (RA preamble, random access channel, PRACH (Physical Random Access Channel)) used in non-collision type random access (CFRA: contention free random access) procedure
  • RA preamble random access channel
  • PRACH Physical Random Access Channel
  • CFRA contention free random access
  • RA preamble resources should be allocated to each user terminal because the user terminal does not know which beam is used to transmit the RA preamble in a multi-beam environment. is there.
  • the user terminal may receive setting information (RACH-ConfigDedicated, RACH individual information) related to the RA preamble allocated individually.
  • RACH-ConfigDedicated RACH individual information
  • FIG. 2 is a conceptual diagram showing an example of RACH-ConfigDedicated.
  • RACH-ConfigDedicated is information related to reference signal resources associated with information (for example, an identifier (ID, ra-PreambleIndex) of RA preamble) related to each RA preamble allocated to the user terminal for CFRA. (Cfra-Resources) may be included.
  • the reference signal resource may be, for example, at least one of a synchronization signal block (SSB: Synchronization Signal Block) and a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal).
  • SSB Synchronization Signal Block
  • CSI-RS Channel State Information-Reference Signal
  • the SSB is a signal block including a synchronization signal (SS) and a broadcast channel (also referred to as a broadcast signal, PBCH, NR-PBCH, etc.), and may be called an SS / PBCH block, an SSB resource, or the like.
  • SS synchronization signal
  • PBCH synchronization signal
  • NR-PBCH NR-PBCH
  • RACH-ConfigDedicated is information on SSB resources (also referred to as ssb-ResourceList, CFRA-SSB-Resource, SSB resource information, etc.) or a predetermined number for each RA preamble identifier (ra-PreambleIndex).
  • Information on CSI-RS resources also referred to as csirs-ResourceList, CFRA-CSIRS-Resource, CSI-RS resource information, etc.).
  • the user terminal has one or more reference signal resources (for example, SSB resources or one or more CSI-corresponding to one or more RA preambles allocated to the user terminal).
  • RS resource for example, SSB resources or one or more CSI-corresponding to one or more RA preambles allocated to the user terminal.
  • search space information for example, search space ID
  • SIB1, OSI, paging and RA in PDCCH-ConfigCommon can set only a single search space for each of SIB1, OSI, paging and RA. .
  • the reference signal resources for example, SSB resources or CSI-RS resources
  • a single set for each of SIB1, OSI, paging and RA Only search spaces can be used.
  • searchSpaceSIB1, searchSpaceOSI, pagingsearchSpace, and ra-searchSpace in PDCCH-ConfigCommon illustrated in FIG. 1 the PDSCH that transmits each of SIB1, OSI, paging, and RA is scheduled.
  • the user terminal cannot properly perform DCI monitoring.
  • the overhead may increase. There is.
  • the present inventors relate to reference signal resources (for example, SSB resources or CSI resources) associated with the RA preamble allocated to the user terminal in RACH-ConfigDedicated, for SIB1, OSI, paging and RA.
  • the idea is to appropriately monitor DCI in the search space by setting at least one search space in the user terminal.
  • information related to a search space for at least one of SIB1, OSI, paging, and RA is included in PDCCH-ConfigCommon in association with a reference signal resource (for example, an SSB resource or a CSI resource).
  • a reference signal resource for example, an SSB resource or a CSI resource.
  • RACH-ConfigDedicated was conceived to include information related to a search space for at least one of SIB1, OSI, paging and RA in association with a reference signal resource (for example, an SSB resource or a CSI resource).
  • the search space set is a set of one or more search spaces.
  • a search space for SIB1 a search space for OSI, a search space for paging, and a search space for RA. May be included.
  • FIG. 3 is a diagram illustrating an example of PDCCH-ConfigCommon according to the first aspect.
  • PDCCH-ConfigCommon includes information on search space sets (also referred to as referenceSignalSpecificSearchSpaces or RS-specific search space information) associated with reference signal resources (for example, SSB resources or CSI-RS resources). May be included.
  • search space sets also referred to as referenceSignalSpecificSearchSpaces or RS-specific search space information
  • reference signal resources for example, SSB resources or CSI-RS resources.
  • referenceSignalSpecificSearchSpaces is information related to a search space (search space set) associated with an SSB resource (also referred to as a searchSpaceSSB, a searchSpaceSSB list (searchSpaceSSB-List)), or a search space associated with a CSI-RS resource (search Information on space sets (also referred to as searchSpaceCSI-RS, searchSpaceCSI-RS list (searchSpaceCSI-RS-List), etc.) may be included.
  • the referenceSignalSpecificSearchSpaces include searchSpaceSSB or earchSpaceCSI-RS may be determined based on reference signal resources associated with the RA preamble. For example, when the SSB resource is associated with the RA preamble in RACH-ConfigDedicated, the referenceSignalSpecificSearchSpaces may include searchSpaceSSB. On the other hand, when the SSB resource is associated with the RA preamble in RACH-ConfigDedicated, the referenceSignalSpecificSearchSpaces may include searchSpaceCSI-RS. Note that referenceSignalSpecificSearchSpaces may include both searchSpaceSSB and earchSpaceCSI-RS.
  • a reference signal resource (for example, an SSB resource or a CSI-RS resource) may be associated with a search space set set by referenceSignalSpecificSearchSpaces. Further, the reference signal resource may be associated with an RA preamble allocated to the user terminal in RACH-ConfigDedicated.
  • Each searchSpaceSSB in referenceSignalSpecificSearchSpaces includes at least information related to an SSB resource (for example, an identifier of an SSB resource (SSB-Index)) and information related to a search space set associated with the SSB resource (search space set information, searchSpaceSet).
  • an SSB resource for example, an identifier of an SSB resource (SSB-Index)
  • searchSpaceSet information related to a search space set associated with the SSB resource.
  • Each searchSpace CSI-RS in referenceSignalSpecificSearchSpaces includes information on CSI-RS resources (for example, CSI-RS resource identifier (CSI-RS-Index)) and information on search space sets associated with the CSI-RS resources. (Search space set information, searchSpaceSet) may be included.
  • the search space set information includes the search space information for SIB1 (searchSpaceSIB1, rmsi-SearchSpace), the search space information for OSI (searchSpaceOtherSystemInformation), the search space information for paging (pagingSearchSpace), and the search for RA. It may include at least one of space information (ra-SearchSpace).
  • the search space information for SIB1, OSI, paging, and RA may each include a search space identifier (SearchSpaceId).
  • SearchSpaceId search space identifier
  • the user terminal based on the SearchSpaceId, information on the time position of the search space (or the time position of monitoring the PDCCH (DCI)) (for example, the period and offset (monitoringSlotPeriodicityAndOffset) of the slot for monitoring the PDCCH,
  • the symbol position (monitoringSymbolsWithinSlot) may be specified.
  • the user terminal may receive the PDCCH-ConfigCommon during at least one of the handover procedure and the cell addition procedure in dual connectivity or carrier aggregation. Based on the referenceSignalSpecificSearchSpaces included in the PDCCH-ConfigCommon, the user terminal searches each search space in the search space set associated with the SSB resource or CSI-RS resource (for example, for SIB1, for OSI, for paging, for RA) At least one of the at least one search space) may be set.
  • the user terminal uses the RA preamble assigned to the user terminal in RACH-ConfigDedicated, and uses the RA preamble assigned to the user terminal, the random access procedure in at least one of the target cell in the handover procedure, PSCell added in DC, DC or CA in CA May start.
  • a reference signal resource (for example, an SSB resource or a CSI-RS resource) associated with the search space set described above may be associated with an RA preamble used in non-collision type random access (CFRA). That is, the referenceSignalSpecificSearchSpaces may be information related to a search space set associated with a reference signal resource in the case of CFRA.
  • CFRA non-collision type random access
  • the user terminal may try random access (contention based random access (CBRA)) using a collision type RA preamble (contention RA preamble).
  • CBRA contention based random access
  • a single search space set (e.g., search space for SIB, search space for OSI, regardless of reference signal resources (e.g., SSB resources) (common to all reference signal resources), At least one of a search space for paging and a search space for RA may be set.
  • PDCCH-ConfigCommon may include information (searchSpaceAnySSB, search space information for CBRA) related to a search space set applied to any reference signal resource for CBRA (for example, SSB resource).
  • the searchSpaceAnySSB includes the search space information for SIB1 (searchSpaceSIB1, rmsi-SearchSpace), search space information for OSI (searchSpaceOtherSystemInformation), search space information for paging (pagingSearchSpace), and search space information for RA (ra-SearchSpace). May be included.
  • each search space in the search space set DCI can be monitored appropriately.
  • a reference signal resource for example, an SSB resource or a CSI resource
  • search space information for SIB1, OSI, paging, and RA is included in RACH-ConfigDedicated in association with reference signal resources (for example, SSB resources or CSI resources).
  • FIG. 4-6 is a diagram illustrating an example of RACH-ConfigDedicated according to the second mode.
  • RACH-ConfigDedicated includes information (CFRA-Resources, reference signal resource information) regarding reference signal resources for CFRA (for example, SSB resources or CSI-RS resources). Also good.
  • CFRA-Resources includes information on SSB resources (ssb-Resource, ssb-Resource list (ssb-ResourceList)) or CSI-RS resources (csirs-Resource, csirs-Resource list (csirs- ResourceList)) may be included.
  • each ssb-Resource included in CFRA-Resources includes an SSB resource (SSB) index (SSB-Index), an RA preamble index (ra-PreambileIndex), and SIB1 search space information ( searchSpaceSIB1, rmsi-SearchSpace), OSI search space information (searchSpaceOtherSystemInformation), paging search space information (pagingSearchSpace), and RA search space information (ra-SearchSpace).
  • SSB SSB resource
  • ra-PreambileIndex RA preamble index
  • SIB1 search space information searchSpaceSIB1, rmsi-SearchSpace
  • OSI search space information searchSpaceOtherSystemInformation
  • pagingSearchSpace pagingSearchSpace
  • RA search space information ra-SearchSpace
  • each csirs-Resource included in CFRA-Resources includes a CSI-RS resource index (CSI-RS-Index), an RA preamble index (ra-PreambileIndex), and SIB1 search space information.
  • CSI-RS-Index CSI-RS resource index
  • RA preamble index ra-PreambileIndex
  • SIB1 search space information rmsi-SearchSpace
  • search space information for OSI searchSpaceOtherSystemInformation
  • search space information for paging pagingSearchSpace
  • search space information for RA ra-SearchSpace
  • Such search space information may be associated with the CSI-RS resource identified by the CSI-RS-Index.
  • information on the search space for SIB1, OSI, paging, and RA may be included as the resource information for reference signals for CFRA.
  • CBRA CBRA
  • the PDCCH-ConfigCommon may include the search space information for CBRA (searchSpaceAnySSB).
  • the searchSpaceAnySSB includes the search space information for SIB1 (searchSpaceSIB1, rmsi-SearchSpace), search space information for OSI (searchSpaceOtherSystemInformation), search space information for paging (pagingSearchSpace), and search space information for RA (ra-SearchSpace). May be included.
  • wireless communication system Wireless communication system
  • communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
  • DC dual connectivity
  • the wireless communication system 1 includes 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), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
  • the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio 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. It is equipped with. Moreover, the user terminal 20 is arrange
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 at the same time using CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC).
  • CC a plurality of cells
  • Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
  • the same carrier may be used.
  • the configuration of the frequency band used by each radio base station is not limited to this.
  • the user terminal 20 can perform communication using time division duplex (TDD) and / or frequency division duplex (FDD) in each cell.
  • TDD time division duplex
  • FDD frequency division duplex
  • a single neurology may be applied, or a plurality of different neurology may be applied.
  • Numerology may be a communication parameter applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length. , TTI length, number of symbols per TTI, radio frame configuration, specific filtering process performed by the transceiver in the frequency domain, specific windowing process performed by the transceiver in the time domain, and the like.
  • subcarrier interval bandwidth, symbol length, cyclic prefix length, subframe length.
  • TTI length number of symbols per TTI
  • radio frame configuration specific filtering process performed by the transceiver in the frequency domain
  • specific windowing process performed by the transceiver in the time domain and the like.
  • the wireless base station 11 and the wireless base station 12 are connected by wire (for example, optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly. May be.
  • the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
  • the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
  • Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
  • orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
  • SC-FDMA single carrier-frequency division multiple access
  • Frequency Division Multiple Access and / or OFDMA is applied.
  • OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single carrier transmission in which the system bandwidth is divided into bands each composed of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between terminals. It is a method.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Moreover, MIB (Master Information Block) is transmitted by PBCH.
  • PDSCH downlink shared channel
  • PBCH Physical Broadcast Channel
  • SIB System Information Block
  • MIB Master Information Block
  • Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
  • Downlink control information (DCI: Downlink Control Information) including PDSCH and / or PUSCH scheduling information is transmitted by the PDCCH.
  • scheduling information may be notified by DCI.
  • DCI for scheduling DL data reception may be referred to as DL assignment
  • DCI for scheduling UL data transmission may be referred to as UL grant.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) delivery confirmation information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
  • HARQ Hybrid Automatic Repeat reQuest
  • EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
  • an uplink shared channel (PUSCH) shared by each user terminal 20
  • an uplink control channel (PUCCH: Physical Uplink Control Channel)
  • a random access channel (PRACH: Physical Random Access Channel)
  • User data, higher layer control information, etc. are transmitted by PUSCH.
  • downlink radio quality information CQI: Channel Quality Indicator
  • delivery confirmation information SR
  • scheduling request etc.
  • a random access preamble for establishing connection with the cell is transmitted by the PRACH.
  • a cell-specific reference signal CRS
  • CSI-RS channel state information reference signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • a measurement reference signal SRS: Sounding Reference Signal
  • a demodulation reference signal DMRS
  • the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 9 is a diagram illustrating an example of the overall configuration of the radio base station according to the present embodiment.
  • the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
  • User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access
  • Retransmission control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
  • IFFT Inverse Fast Fourier Transform
  • precoding processing precoding processing, and other transmission processing
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
  • the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure.
  • the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
  • the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing, error correction on user data included in the input upstream signal. Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
  • the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
  • CPRI Common Public Radio Interface
  • X2 interface May be.
  • the transmission / reception unit 103 may transmit downlink control information (for example, DCI) using a control resource set (CORESET: CORN RESOURCE SET) associated with a specific search space.
  • DCI downlink control information
  • CORESET CORN RESOURCE SET
  • the transmission / reception unit 103 may transmit configuration information (PDCCH-ConfigCommon) regarding the downlink control channel in at least one of the handover procedure, the secondary cell addition procedure, and the primary secondary cell addition procedure. Moreover, the transmission / reception part 103 may transmit the setting information (RACH-ConfigDedicated) regarding RACH.
  • PDCCH-ConfigCommon configuration information
  • RACH-ConfigDedicated setting information
  • FIG. 10 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment.
  • the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations may be included in the radio base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104.
  • the control unit (scheduler) 301 controls the entire radio base station 10.
  • the control unit 301 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal allocation in the mapping unit 303, and the like.
  • the control unit 301 also controls signal reception processing in the reception signal processing unit 304, signal measurement in the measurement unit 305, and the like.
  • the control unit 301 schedules system information, downlink data signals (for example, signals transmitted on PDSCH), downlink control signals (for example, signals transmitted on PDCCH and / or EPDCCH, delivery confirmation information, etc.) (for example, resources Control).
  • downlink data signals for example, signals transmitted on PDSCH
  • downlink control signals for example, signals transmitted on PDCCH and / or EPDCCH, delivery confirmation information, etc.
  • resources Control for example, resources Control.
  • the control unit 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is necessary for the uplink data signal.
  • the control unit 301 controls scheduling of synchronization signals (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), downlink reference signals (for example, CRS, CSI-RS, DMRS) and the like.
  • synchronization signals for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)
  • downlink reference signals for example, CRS, CSI-RS, DMRS
  • the control unit 301 includes an uplink data signal (for example, a signal transmitted by PUSCH), an uplink control signal (for example, a signal transmitted by PUCCH and / or PUSCH, delivery confirmation information, etc.), a random access preamble (for example, by PRACH). (Sending signal), scheduling of uplink reference signals and the like are controlled.
  • an uplink data signal for example, a signal transmitted by PUSCH
  • an uplink control signal for example, a signal transmitted by PUCCH and / or PUSCH, delivery confirmation information, etc.
  • a random access preamble for example, by PRACH.
  • the control unit 301 may perform control to transmit DCI using CORESET.
  • the control unit 301 may perform control to generate and transmit DCI using a specific DCI format and an RNTI corresponding to the format in a specific search space.
  • the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 302 generates, for example, a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information based on an instruction from the control unit 301.
  • the DL assignment and UL grant are both DCI and follow the DCI format.
  • the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
  • CSI Channel State Information
  • the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301.
  • the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, and the like based on the received signal.
  • the measurement unit 305 includes received power (for example, RSRP (Reference Signal Received Power)), received quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)).
  • Signal strength for example, RSSI (Received Signal Strength Indicator)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 301.
  • FIG. 11 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
  • the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
  • the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure.
  • the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information of downlink data may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like. 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • the transmission / reception unit 203 may monitor a control resource set (CORESET: Control REsource SET) using a specific search space determined by the control unit 401 described later.
  • CORESET Control REsource SET
  • the transmission / reception unit 203 may receive configuration information (PDCCH-ConfigCommon) related to the downlink control channel in at least one of the handover procedure, the secondary cell addition procedure, and the primary secondary cell addition procedure. Moreover, the transmission / reception part 103 may receive the setting information (RACH-ConfigDedicated) regarding RACH.
  • PDCCH-ConfigCommon configuration information
  • RACH-ConfigDedicated setting information
  • FIG. 12 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
  • the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.
  • the control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal allocation in the mapping unit 403, and the like.
  • the control unit 401 also controls signal reception processing in the reception signal processing unit 404, signal measurement in the measurement unit 405, and the like.
  • the control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the radio base station 10 from the reception signal processing unit 404.
  • the control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of determining the necessity of retransmission control for the downlink control signal and / or the downlink data signal.
  • the control unit 401 controls the setting of each search space in the search space set based on the information on the search space set associated with each reference signal resource included in the setting information (PDCCH-ConfigCommon) on the downlink control channel. It may also be possible (first aspect).
  • the control unit 401 controls the setting of each search space in the search space set based on information on the search space set associated with each reference signal resource included in the RACH-ConfigDedicated configuration information (RACH-ConfigDedicated). It is also possible (second aspect).
  • the resource for each reference signal may be associated with a preamble allocated to the user terminal for a non-collision type random access procedure.
  • Each of the reference signal resources may be at least one of a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) resource.
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • the configuration information (PDCCH-ConfigCommon) related to the downlink control channel may include information related to a single search space common to all reference signal resources for the collision type random access procedure.
  • the search space set may include at least one of a search space for SIB (System Information Block) 1, a search space for OSI (Other System Information), a search space for paging, and a search space for random access. .
  • SIB System Information Block
  • OSI Ole System Information
  • search space for paging a search space for paging
  • search space for random access a search space for random access.
  • control unit 401 may update parameters used for control based on the information.
  • the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
  • the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.
  • the transmission signal generation unit 402 generates an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
  • CSI channel state information
  • the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
  • the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure. Further, the reception signal processing unit 404 can constitute a reception unit according to the present disclosure.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
  • the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
  • the measurement unit 405 performs measurement on the received signal.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.
  • the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement unit 405 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 401.
  • each functional block is realized using one device physically and / or logically coupled, or directly and / or two or more devices physically and / or logically separated. Alternatively, it may be realized indirectly by connecting (for example, using wired and / or wireless) and using these plural devices.
  • the wireless base station, the user terminal, and the like in the present embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 13 is a diagram illustrating an example of a hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • the wireless 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. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to perform calculations by reading predetermined software (programs) on hardware such as the processor 1001 and the memory 1002, for example, via the communication device 1004. This is realized by controlling communication and controlling reading and / or writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • programs program codes
  • software modules software modules
  • data data
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured by one.
  • the memory 1002 may be called 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, and the like that can be executed to implement the wireless communication method according to the present embodiment.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as 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 frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, the 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 channel and / or symbol may be a signal (signaling).
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
  • a 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 does not depend on the neurology.
  • the slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • the slot may be a time unit based on the numerology.
  • the slot may include a plurality of mini slots. Each minislot may be configured with one or more symbols in the time domain. The minislot may also be called a subslot.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting signals. Different names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • a plurality of consecutive subframes may be called a TTI
  • TTI slot or one minislot
  • a unit representing TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit for scheduling in wireless communication.
  • a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit of a channel-encoded data packet (transport block), a code block, and / or a code word, or may be a processing unit such as scheduling or link adaptation.
  • a time interval for example, the number of symbols
  • a transport block, a code block, and / or a code word is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling unit. Further, 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 LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe.
  • a TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, or a subslot.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI) is less than the TTI length of the long TTI and 1 ms. It may be replaced with 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 (subcarriers) in the frequency domain. Further, the RB may include one or a plurality of symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
  • One or more RBs include physical resource blocks (PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. May be called.
  • the resource block may be configured by one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • the structure of the above-described radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
  • the information, parameters, and the like described in this specification may be expressed using absolute values, may be expressed using relative values from a predetermined value, or other corresponding information may be used. May be represented.
  • the radio resource may be indicated by a predetermined index.
  • names used for parameters and the like are not limited names in any way.
  • various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
  • information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
  • the name is not limited in any way.
  • information, signals, etc. can be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
  • Information, signals, and the like may be input / output via a plurality of network nodes.
  • the input / output information, signals, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
  • information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • 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 L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).
  • notification of predetermined information is not limited to explicit notification, but implicitly (for example, by not performing notification of the predetermined information or other information) May be performed).
  • the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
  • the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted / received via a transmission medium.
  • software can use websites, servers using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.) , Or other remote sources, these wired and / or wireless technologies are included within the definition of transmission media.
  • system and “network” used in this specification are used interchangeably.
  • base station BS
  • radio base station eNB
  • gNB gNodeB
  • cell gNodeB
  • cell group a base station
  • carrier a base station
  • a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
  • the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, an indoor small base station (RRH: Remote Radio Head)) can also provide communication services.
  • a base station subsystem eg, an indoor small base station (RRH: Remote Radio Head)
  • RRH Remote Radio Head
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.
  • the radio base station in this specification may be read by the user terminal.
  • each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
  • the user terminal 20 may have a function that the wireless base station 10 has.
  • words such as “up” and “down” may be read as “side”.
  • the uplink channel may be read as a side channel.
  • a user terminal in this specification may be read by a radio base station.
  • the wireless base station 10 may have a function that the user terminal 20 has.
  • the operation performed by the base station may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may include a base station and one or more network nodes other than the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited thereto) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect / embodiment described in this specification may be used alone, may be used in combination, or may be switched according to execution. Further, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.
  • Each aspect / embodiment described herein includes 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), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-WideBand), Bluetooth (registered trademark) ), A system using another appropriate wireless communication method, and / or a next generation system extended based on these methods.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B L
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining may encompass a wide variety of actions. For example, “determination” means calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data). It may be considered to “judge” (search in structure), ascertaining, etc.
  • “determination (decision)” includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”. Also, “determination” is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
  • connection refers to any direct or indirect connection between two or more elements or By coupling, it can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • the radio frequency domain can be considered “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and / or light (both visible and invisible) regions.

Abstract

Selon un aspect de la présente invention, le terminal d'utilisateur comprend : une unité de réception qui reçoit des informations de réglage concernant un canal de commande de liaison descendante pendant une procédure de transfert et/ou une procédure d'ajout de cellules dans une connectivité double ou une agrégation de porteuses; et une unité de commande qui, sur la base d'informations concernant un ensemble d'espaces de recherche associés à chacune des ressources de signal de référence incluses dans les informations de réglage, commande le réglage de chacun des espaces de recherche dans l'ensemble d'espaces de recherche.
PCT/JP2018/017562 2018-05-02 2018-05-02 Terminal d'utilisateur et dispositif de station de base WO2019211917A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015065485A (ja) * 2011-12-22 2015-04-09 パナソニック株式会社 無線通信端末、無線通信装置及び送信制御方法
WO2018062457A1 (fr) * 2016-09-29 2018-04-05 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communications sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015065485A (ja) * 2011-12-22 2015-04-09 パナソニック株式会社 無線通信端末、無線通信装置及び送信制御方法
WO2018062457A1 (fr) * 2016-09-29 2018-04-05 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communications sans fil

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Title
AT &T: "Details of multi-TRP and multi-panel transmission", 3GPP TSG RAN WG1 NR AD-HOC#2 R1-1710437, 26 June 2017 (2017-06-26), XP051299649, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_AH/NR_AH_1706/Docs/R1-1710437.zip> *
NTT DOCOMO INC: "Summary of offline for search space", 3 GPP RAN#92BIS R1-1805655, 19 April 2018 (2018-04-19), XP051427781, Retrieved from the Internet <URL:http://3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_92b/Docs/R1-1805655.zip> *
NTT DOCOMO, INC: "Search space", 3GPP TSG RAN WG1 MEETING #92BIS R1-1805048, 7 April 2018 (2018-04-07), pages 1 - 12, XP051414356, Retrieved from the Internet <URL:http://3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_92b/Docs/R1-1805048.zip> *

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