WO2020202448A1 - Terminal utilisateur et procédé de communication sans fil - Google Patents

Terminal utilisateur et procédé de communication sans fil Download PDF

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Publication number
WO2020202448A1
WO2020202448A1 PCT/JP2019/014549 JP2019014549W WO2020202448A1 WO 2020202448 A1 WO2020202448 A1 WO 2020202448A1 JP 2019014549 W JP2019014549 W JP 2019014549W WO 2020202448 A1 WO2020202448 A1 WO 2020202448A1
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information
coreset
priority
transmission
search space
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PCT/JP2019/014549
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English (en)
Japanese (ja)
Inventor
一樹 武田
聡 永田
リフェ ワン
ギョウリン コウ
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2019/014549 priority Critical patent/WO2020202448A1/fr
Publication of WO2020202448A1 publication Critical patent/WO2020202448A1/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

Definitions

  • the present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • 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).
  • a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.
  • 5G 5th generation mobile communication system
  • 5G + plus
  • NR New Radio
  • 3GPP Rel.15 or later, etc. is also being considered.
  • DCI downlink control information
  • NR future wireless communication systems
  • existing downlink control information (DCI) formats for example, DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2 and 2_3
  • the new DCI format may be used, for example, for high-reliability and low-latency communications (URLLC) services.
  • URLLC low-latency communications
  • DCI monitoring performed by the UE is subject to certain constraints (eg, the maximum number of PDCCH candidates that can be monitored per slot per cell described above, and the number of CCEs that can be duplicated per slot per cell described above. ) Is also expected to be imposed.
  • a new DCI format When a new DCI format is introduced, if it operates based on the predetermined constraint, monitoring of the new DCI format and processing based on the new DCI format (for example, transmission of an uplink shared channel or reception of a downlink shared channel, etc.) There is a risk of dropping or delaying at least one of the above. In addition, there is a risk that at least one of monitoring of the existing DCI format and processing based on the existing DCI format cannot be properly performed.
  • one of the purposes of the present inventors is to provide a user terminal and a wireless communication method capable of appropriately controlling DCI monitoring when introducing a new DCI format.
  • the user terminal includes a receiving unit that receives the setting information of the search space set, the priority of the control resource set associated with the search space set, the priority of the search space set, and the search. It is characterized by including a control unit that controls monitoring of downlink control information in a specific format based on at least one of some downlink control channel candidates in the space set.
  • DCI monitoring can be appropriately controlled when a new DCI format is introduced.
  • FIG. 1 is a diagram showing an example of SS setting information according to the first aspect.
  • FIG. 2 is a diagram showing an example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 3 is a diagram showing another example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 4 is a diagram showing still another example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 5 is a diagram showing an example of monitoring control based on the priority of the SS set of the first aspect.
  • FIG. 6 is a diagram showing a first example of SS setting information according to the second aspect.
  • FIG. 7 is a diagram showing a second example of SS setting information according to the second aspect.
  • FIG. 8 is a diagram showing a third example of SS setting information according to the second aspect.
  • FIG. 9 is a diagram showing an example of monitoring control according to the second aspect.
  • FIG. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 11 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • FIG. 12 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • FIG. 13 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the SS set is a set of candidates (PDCCH candidates) for downlink control channels (for example, Physical Downlink Control Channel (PDCCH)) monitored by the UE.
  • the SS set is also called a PDCCH search space set, a search space, or the like.
  • the UE monitors PDCCH candidates in one or more SS sets.
  • the one or more SS sets are a common SS set (common search space (CSS)) set for one or more UEs and a UE-specific SS set (UE-specific search space (UE-specific search space)). It may include at least one with USS))) set).
  • the CSS set may include, for example, at least one of the following: -Type 0-PDCCH CSS set-Type 0A-PDCCH CSS set-Type 1-PDCCH CSS set-Type 2-PDCCH CSS set-Type 3-PDCCH CSS set
  • the type 0-PDCCH CSS set is a DCI format that is scrambled by a cyclic redundancy check (Cyclic Redundancy Check (CRC)) with a System Information-Radio Network Temporary Identifier (SI-RNTI) in a predetermined cell (for example, a primary cell). Used for monitoring.
  • CRC Cyclic Redundancy Check
  • SI-RNTI System Information-Radio Network Temporary Identifier
  • the type 0-PDCCH CSS set is the information (for example, Radio Resource Control (RRC) parameter "pdcch-" in the master information block (Master Information Block (MIB)) transmitted on the broadcast channel (Physical Broadcast Chanel (PBCH)). It may be set in the UE based on ConfigSIB1 ”).
  • RRC Radio Resource Control
  • MIB Master Information Block
  • PBCH Physical Broadcast Chanel
  • the type 0-PDCCH CSS set is the information in the cell-specific PDCCH information (cell-specific PDCCH information, eg, RRC parameter "PDCCH-ConfigCommon") (eg, RRC parameter "searchSpaceSIB1" or “searchSpaceZero"). It may be set based on.
  • the cell-specific PDCCH information may be notified to the UE by system information (for example, System Information Block (SIB) 1) or UE-specific RRC signaling.
  • SIB System Information Block
  • the Type 0A-PDCCH CSS set is used for a DCI format monitor that is CRC scrambled by SI-RNTI in a given cell (eg, primary cell).
  • the type 0A-PDCCH CSS set may be set based on the information in the cell-specific PDCCH information (eg, the RRC parameter "searchSpaceOtherSystemInformation").
  • the Type 1-PDCCH CSS set is used for CRC scrambled DCI format monitors in a given cell (eg, primary cell) with Random Access (RA) -RNTI or TC-RNTI.
  • the type 1-PDCCH CSS set may be set based on the information in the cell-specific PDCCH information (eg, the RRC parameter "ra-SearchSpace").
  • the Type 2-PDCCH CSS set is used for a DCI format monitor that is CRC scrambled with Paging (P) -RNTI in a given cell (eg, primary cell).
  • the type 2-PDCCH CSS set may be set based on the information in the cell-specific PDCCH information (eg, the RRC parameter "pagingSearchSpace").
  • the Type 3-PDCCH CSS set is used for CRC scrambled DCI format monitors with Slot Format Indicator (SFI) -RNTI, INT-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI. ..
  • SFI Slot Format Indicator
  • the type 3-PDCCH CSS set is set based on the information in the UE-specific PDCCH information (UE-specific PDCCH information, eg, RRC parameter "PDCCH-Config") (eg, RRC parameter "SearchSpace"). May be good.
  • the USS set is used for CRC scrambled DCI format monitors by C-RNTI or CS-RNTI.
  • the USS set may be set based on information in the UE-specific PDCCH information (eg, the RRC parameter "SearchSpace").
  • At least one of a USS set for monitoring DCI formats 1_0 and 0_0 and a USS set for monitoring DCI formats 1_1 and 0_1 may be set in the UE.
  • the DCI formats 1_0 and 1_1 are used for scheduling downlink shared channels (for example, Physical Downlink Shared Channel (PDSCH)).
  • the DCI formats 0_0 and 0_1 are used for scheduling uplink shared channels (eg, Physical Uplink Shared Channel (PUSCH)).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • the DCI formats 1_0 and 0_0 may have a smaller size (payload) than the DCI formats 1_1 and 1_0, respectively.
  • the DCI formats 1_0 and 0_0 are also referred to as fallback DCI and the like.
  • DCI formats 1_1 and 1_0 are also referred to as non-fallback DCI and the like.
  • a control resource set (Control Resource Set (CORESET)) is associated with each SS set as described above.
  • the CORESET may include a plurality of types (for example, CORESET # 0, CORESET (common CORESET) common to one or more UEs (common CORESET), and CORESET (individual CORESET) unique to the UE).
  • CORESET # 0 may be set based on the information in the MIB or the cell-specific PDCCH information (for example, "PDCCH-ConfigCommon" of the RRC parameter) (for example, "ControlResourceSetzero" of the RRC parameter).
  • CORESET # 0 may be associated with either a CSS set or a USS set.
  • the common CORESET may be set based on the information in the cell-specific PDCCH information (for example, the RRC parameter "PDCCH-ConfigCommon") (for example, the RRC parameter "commonControlResourceSet”).
  • the common CORESET may be associated with either a CSS set or a USS set.
  • the UE-specific CORESET may be set based on the information (for example, the RRC parameter "ControlResourceSet") in the UE-specific PDCCH information (for example, the RRC parameter "PDCCH-Config").
  • the CORESET may be associated with either a CSS set or a USS set.
  • the maximum number of the CORESETs that can be set per the bandwidth part (BWP) in the cell may be, for example, 3.
  • the UE may be set with a predetermined period (PDCCH monitoring occurrence, monitoring opportunity (MO), monitoring period) of a predetermined cycle for monitoring (blind decoding) each SS set.
  • the UE may receive information indicating the cycle, offset, period, etc. of the monitoring opportunity for each SS set.
  • the UE may be set with a monitoring opportunity for each SS set.
  • the UE may monitor the PDCCH candidates for the SS set in CORESET at the configured monitoring opportunity.
  • the monitoring opportunity may consist of one or more slots.
  • the maximum number of PDCCH candidates that can be monitored by the UE per cell and slot may be limited.
  • the maximum number may be set for each subcarrier interval ⁇ . For example, when the subcarrier spacing ⁇ is 15 kHz, 30 kHz, 60 kHz, and 120 kHz, the maximum number may be 44, 36, 22, 20, respectively.
  • the maximum number of non-overlapping control channel elements in which the UE per cell and per slot may be limited.
  • the maximum number may be set for each subcarrier interval ⁇ . For example, when the subcarrier spacing ⁇ is 15 kHz, 30 kHz, 60 kHz, and 120 kHz, the maximum number may be 56, 56, 48, 32, respectively.
  • the CCE for the PDCCH candidate may be non-overlapping if the CORESET index is different or the first symbol for receiving the PDCCH candidate is different.
  • the plurality of services may be, for example, further advanced mobile broadband (enhanced Mobile Broadband (eMBB)) and highly reliable and low-latency communications (Ultra-Reliable and Low-Latency Communications (URLLC)).
  • eMBB enhanced Mobile Broadband
  • URLLC Ultra-Reliable and Low-Latency Communications
  • URLLC requires less delay and higher reliability than eMBB.
  • NR is considering introducing a new DCI format in addition to the existing DCI formats (for example, DCI formats 1_0, 1_1, 0_0, 0_1, 2_0, 2_1, 2_2, and 2_3).
  • the new DCI format may be used, for example, for URLLC.
  • the new DCI format used for PDSCH scheduling is also called DCI format 1_x or the like.
  • the new DCI format used for PUSCH scheduling may be referred to as DCI format 0_x or the like.
  • "x" may be any character string.
  • the name of the new DCI format is not limited to this.
  • DCI monitoring also referred to as PDCCH monitoring, DCI monitoring, monitoring, blind decoding, etc.
  • PDCCH monitoring also referred to as PDCCH monitoring, DCI monitoring, monitoring, blind decoding, etc.
  • PDCCH monitoring also referred to as PDCCH monitoring, DCI monitoring, monitoring, blind decoding, etc.
  • the UE has certain restrictions (for example, the above-mentioned PDCCH that can be monitored per slot per cell). It is also assumed that the maximum number of candidates and the number of CCEs that can be duplicated per slot per cell described above) will be imposed.
  • the UE monitors at least DCI format 1_x / 0_x and at least processing based on the DCI format 1_x / 0_x. There is a risk of dropping one (monitoring / processing of DCI format 1_x / 0_x).
  • the UE may delay the monitoring / processing of DCI format 1_x / 0_x.
  • the UE may give priority to monitoring / processing of the DCI format 1_x / 0_x, so that the monitoring of the CSS set may fail, causing a problem such as connection failure.
  • the present inventors have studied a method for appropriately controlling DCI monitoring when introducing new DCI formats 1_x and 0_x, and have reached the present invention.
  • the UE is the priority of the CORESET associated with the SS set (first aspect), the priority of the SS set (first aspect), and some PDCCH candidates within the SS set (the first aspect). It was conceived to control the monitoring of DCI format 1_x / 0_x (downlink control information of a specific format) based on at least one of the downlink control channel candidates) (second aspect).
  • the SS set for DCI format 1_x / 0_x may be configured in the UE.
  • At least one of the following SS sets may be configured in the UE.
  • -The above CSS set (for example, at least one of the above type 0-PDCCH CSS set, type 0A-PDCCH CSS set, type 1-PDCCH CSS set, type 2-PDCCH CSS set, type 3-PDCCH CSS set).
  • -USS set for DCI format 1_0 / 0_0-USS set for DCI format 1-1 / 0_1-SS set for DCI format 1_x / 0_x for example, USS set
  • the UE may receive the configuration information of each SS set as described above (SS setting information, for example, "Search Space" of RRC information element (Information Element (IE)) (also referred to as RRC parameter)). ..
  • SS setting information for example, "Search Space" of RRC information element (Information Element (IE)) (also referred to as RRC parameter)).
  • IE Information Element
  • RRC parameter also referred to as RRC parameter
  • -SS set identifier search space ID, for example, "searchSpaceId” of RRC IE
  • controlResourceSetId control resource set ID, eg, RRC IE "controlResourceSetId” • Cycles and offsets of monitoring opportunities, including SS sets (eg, RRC IE's "monitoring Slot Periodicity And Offset") -Period of monitoring opportunity (eg RRC IE "duration") -Number of PDCCH candidates for each aggregation level in the SS set (eg RRC IE "nrofCandidates”) -SS set type such as CSS set or USS set (search space type, for example, "searchSpaceType” of RRC IE) -DCI format to be monitored in the SS set (DCI format information, for example, "dci-Formats" of RRC IE)
  • the UE may recognize that the SS set set by the SS setting information is for DCI format 1_x / 0_x. Good.
  • FIG. 1 is a diagram showing an example of SS setting information according to the first aspect.
  • which of the SS sets identified by the search space ID is the DCI format information (for example, "dci-Formats" of RRC IE) in the SS setting information (for example, "Search Space” of RRC IE). It may indicate whether it is used for a DCI format monitor.
  • FIG. 1 shows whether the DCI format information is used for a monitor of DCI format 1_0 / 0_0, DCI format 1-11 / 0_1, or DCI format 1_x / 0_x.
  • the SS set for DCI format 1_x / 0_x set based on the SS setting information may be associated with a predetermined CORESET (for example, common CORESET or individual CORESET).
  • the UE is based on the CORESET priority (CORESET level priority) associated with the SS set for DCI format 1_x / 0_x, or the SS set priority (SS set level priority), and the DCI format 1_x. Monitoring of / 0_x may be controlled.
  • CORESET level priority CORESET level priority
  • SS set priority SS set level priority
  • the UE when monitoring opportunities within multiple SS sets are set up in the same slot, the UE has the maximum number of PDCCH candidates that can be monitored per cell and per slot and the maximum number of non-overlapping CCEs.
  • Priority control of monitoring among a plurality of SSs in the slot may be performed based on at least one. For example, the UE may start monitoring from the SS set having the highest priority, and stop monitoring the predetermined number of SS sets when the maximum number is exceeded.
  • the CORESET priority associated with the SS set for DCI format 1_x / 0_x may be explicitly instructed by the UE or implicitly instructed by the UE.
  • the UE may receive information (priority information) indicating the priority of CORESET.
  • the priority information may be included in at least one CORESET setting information set in the UE (CORESET setting information, for example, "ControlResourceSet” of RRC IE).
  • the priority of CORESET may be applied to at least one type of CORESET.
  • the priority of CORESET may be applied between common CORESET and individual CORESET and may not be applied to CORESET # 0.
  • the priority of CORESET may be applied between common CORESET, individual CORESET and CORESET # 0.
  • the priority of CORESET may be applied among individual CORESETs and may not be applied to common CORESETs and CORESETs # 0.
  • the UE may derive (determine) the priority of CORESET according to a predetermined rule.
  • the predetermined rule may be based on at least one of the CORESET type and ID.
  • the priority of CORESET may be determined in the order of CORESET # 0> common CORESET> individual CORESET based on the type.
  • the priority of CORESET may be determined as the COREST ID is smaller or larger.
  • the priority may be determined by the CORESET ID between the CORESETs (CORESETs of the same type) having the same priority determined based on the type.
  • FIG. 2 is a diagram showing an example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 2 it is assumed that at least a part of each monitoring opportunity of SS sets # 1 to # 5 overlaps in the same slot.
  • the number, type, etc. of SS sets with overlapping monitoring opportunities are not limited to those shown in FIG.
  • the UE may determine the priority of CORESET based on either the explicit or implied instructions described above.
  • SS set # 1 is the above CSS set.
  • SS set # 2 is a USS set for DCI format 1_0 / 0_0.
  • SS set # 3 is a USS set for DCI format 1-1 / 0_1.
  • SS sets # 4 and # 5 are SS sets for DCI format 1_x / 0_x.
  • a part of a plurality of SS sets having overlapping monitoring opportunities may be associated with the same CORESET.
  • the plurality of SS sets may be associated with different CORESETs.
  • SS sets # 1 to # 3 are associated with CORESET # 1
  • SS sets # 4 and # 5 are associated with CORESET # 2
  • the present invention is not limited to this.
  • CORESET # 2 associated with SS sets # 4 and # 5 for DCI format 1_x / 0_x and CORESET # 1 having a priority different from that of CORESET # 2 may be set.
  • the UE may be CORESET # 1, CORESET # 0, common CORESET, or individual CORESET, respectively. Further, the CORESET # 2 to which the SS set for the DCI format 1_x / 0_x is associated may be a common CORESET or an individual CORESET.
  • CORESET # 1 may be a common CORESET or CORESET # 0
  • CORESET # 2 may be an individual CORESET.
  • the UE is associated with the SS associated with CORESET # 1 based on the priorities of CORESET # 1 and # 2 (eg, CORESET # 0> common CORESET> individual CORESET).
  • the monitoring of sets # 1 to # 3 may take precedence over the monitoring of SS sets # 4 and # 5 associated with CORESET # 2.
  • monitoring opportunity cycle (monitoring cycle) of SS sets # 1 to # 3 is longer than the monitoring cycle of SS sets # 4 and # 5
  • monitoring of SS sets # 1 to # 3 is performed as described above. It may be prioritized.
  • FIG. 3 is a diagram showing another example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 3 differs from FIG. 2 in that CORESET # 1 is an individual CORESET and CORESET # 2 is a common CORESET or CORESET # 0.
  • CORESET # 1 is an individual CORESET
  • CORESET # 2 is a common CORESET or CORESET # 0.
  • FIG. 3 the differences from FIG. 2 will be mainly described.
  • the UE is set to CORESET # 2 based on the priority of CORESET # 1 and # 2 (for example, CORESET # 0> common CORESET> individual CORESET).
  • the monitoring of the associated SS sets # 4 and # 5 may take precedence over the monitoring of the SS sets # 1 to # 3 associated with CORESET # 1.
  • FIG. 4 is a diagram showing still another example of monitoring control based on the priority of CORESET of the first aspect.
  • FIG. 4 differs from FIG. 3 in that CORESET # 2 is associated with SS set # 1 which is a CSS set as well as SS sets # 4 and # 5 for DCI format 1_x / 0_x.
  • CORESET # 1 may be an individual CORESET
  • CORESET # 2 may be a common CORESET or CORESET # 0.
  • the UE is associated with the SS associated with CORESET # 2 based on the priorities of CORESET # 1 and # 2 (eg, CORESET # 0> common CORESET> individual CORESET).
  • Monitoring of sets # 1, # 4, and # 5 may take precedence over monitoring of SS sets # 2, and # 3 associated with CORESET # 1.
  • SS set # 1 which is a CSS set while giving priority to PDSCH or PUSCH (for example, traffic for URLLC) scheduled by DCI format 1_x / 0_x monitored by SS sets # 4 and # 5.
  • Communication based on DCI DCI common to one or more UEs (common DCI)) monitored by is also prioritized.
  • the priority of the monitoring set of the SS set can be controlled by controlling the association between the SS set and CORESET. Therefore, even if at least a part of the monitoring opportunities of the plurality of SS sets overlap in the same slot, the UE monitors the plurality of SS sets based on the priority of CORESET associated with each of the plurality of SS sets. Priority control can be performed appropriately.
  • the priority of the SS set for DCI format 1_x / 0_x may be explicitly instructed by the UE or implicitly instructed by the UE.
  • the UE may receive information (priority information) indicating the priority of a predetermined SS set.
  • the priority information may be included in at least one SS setting information set in the UE (for example, "Search Space" of RRC IE).
  • the SS set priority may be applied to at least one type of SS set.
  • SS set priorities may be applied among all of the CSS set, USS set and SS set for DCI format 1_x / 0_x.
  • the CSS set includes at least one of the above type 0-PDCCH CSS set, type 0A-PDCCH CSS set, type 1-PDCCH CSS set, type 2-PDCCH CSS set, and type 3-PDCCH CSS set. It may be.
  • the USS set may include at least one USS set for DCI format 1_0 / 0_0 and a USS set for DCI format 1-1 / 0_1.
  • the priority of the SS set may be applied between the USS set and the SS set for DCI format 1_x / 0_x (for example, the USS set).
  • SS set priorities may be applied between USS sets used for monitoring different DCI formats, excluding CSS sets.
  • the UE may derive (determine) the priority of the SS set according to a predetermined rule.
  • the predetermined rule may be based on at least one of the SS set type and ID.
  • the priority of the SS set may be determined in the order of SS set # 0> CSS set> USS set based on the type.
  • the priority of the SS set may be determined as the search space ID is smaller or larger.
  • the priority may be determined by the search space ID between SS sets having the same priority determined based on the type (SS sets of the same type).
  • the SS set # 0 may be an SS set set based on the MIB.
  • FIG. 5 is a diagram showing an example of monitoring control based on the priority of the SS set of the first aspect.
  • FIG. 5 differs from FIGS. 2 to 4 in that SS sets # 1 to # 5 are associated with the same CORESET # 1.
  • the UE may determine the priority of the SS set based on either the explicit or implied instructions described above.
  • the UE may be CORESET # 1, CORESET # 0, common CORESET, or individual CORESET, respectively.
  • the CORESET # 2 to which the SS set for the DCI format 1_x / 0_x is associated may be a common CORESET or an individual CORESET.
  • the UE sets the SS set based on the priority of SS set # 1 to # 5 (for example, SS set # 0> CSS set> USS set). Priority control of monitoring # 1 to # 5 may be performed.
  • the UE may perform priority control of monitoring based on at least one of the search space ID and the DCI format to be monitored.
  • At least a part of SS sets # 1 to # 5 may be associated with different CORESETs. That is, the priority control based on the priority of the SS set can be applied not only when the SS set set in the UE is associated with the same CORESET but also when it is associated with a different CORESET.
  • priority control based on the priority of CORESET and the priority of SS set may be applied in combination. For example, priority control of monitoring using the priority of SS sets may be applied among a plurality of SS sets associated with the same CORESET (or CORESET of the same priority). Alternatively, priority control of monitoring using the priority of CORESET to which the SS set is associated may be applied among a plurality of SS sets having the same priority.
  • the UE when the SS set for DCI format 1_x / 0_x is set in the UE, at least a part of the monitoring opportunity of the SS set is the monitoring opportunity of another SS set. Even if they overlap in the same slot, the UE can appropriately perform priority control of monitoring of the SS set and the other SS sets.
  • PDCCH candidates for DCI format 1_x / 0_x may be configured in a predetermined SS set.
  • the second aspect differs from the first aspect in that the SS set specific to the DCI format 1_x / 0_x does not have to be set in the UE.
  • the differences from the first aspect will be mainly described.
  • the UE may control the monitoring of DCI format 1_x / 0_x based on some PDCCH candidates in the predetermined SS set.
  • the PDCCH candidate for DCI format 1_x / 0_x in the predetermined SS set may be defined in advance in the specifications.
  • the PDCCH candidate for the DCI format 1_x / 0_x may be a part of the PDCCH candidate of a predetermined aggregation level in the predetermined SS set (for example, the first PDCCH candidate).
  • the PDCCH candidate for DCI format 1_x / 0_x in the predetermined SS set may be configured in the UE by the upper layer parameter (for example, RRC parameter).
  • the upper layer parameter for example, RRC parameter
  • the UE has information indicating the number of PDCCH candidates used for monitoring DCI format (DF) 1_x / 0_x in a predetermined SS set (PDCCH candidate number information for DF1_x / 0_x, for example, "nrofCandidates-URLLC" of RRC IE. ) May be received.
  • the DF1_x / 0_x PDCCH candidate number information may indicate the number of PDCCH candidates for each aggregation level set for monitoring DF1_x / 0_x.
  • the PDCCH candidate number information for DF1_x / 0_x may be included in the SS setting information for the predetermined SS set (for example, "Search Space" of RRC IE). Further, as described above, the SS setting information may include the total number of PDCCH candidates for each aggregation level in the SS set (PDCCH candidate number information, for example, "nrofCandidates" of RRC IE). The PDCCH candidate number information for DF1_x / 0_x may be a subset of the PDCCH candidate information.
  • the predetermined SS set may be at least one of the CSS set and the USS set.
  • FIG. 6 is a diagram showing a first example of SS setting information according to the second aspect.
  • FIG. 6 shows an example in which a predetermined SS set including a PDCCH candidate for monitoring DF1_x / 0_x is a CSS set.
  • the SS setting information may include the setting information for the CSS set (CSS set setting information, for example, "common" of RRC IE).
  • CSS set setting information for example, "common” of RRC IE.
  • the CSS setting information may include the PDCCH candidate number information for DF1_x / 0_x (for example, "nrofCandidates-URLLC" of RRC IE).
  • the PDCCH candidate number information for DF1_x / 0_x is the number of PDCCH candidates for each aggregation level (for example, “aggregationLevel1”, “aggregationLevel2”, “aggregationLevel4", “aggregationLevel8”, “aggregationLevel16” of RRC IE). May be indicated. The number that can be set in these may be smaller than the above-mentioned PDCCH candidate number information (for example, "aggregationLevel1”, “aggregationLevel2", “aggregationLevel4", “aggregationLevel8”, “aggregationLevel16” in "nrofCandidates” of RRC IE).
  • FIG. 7 is a diagram showing a second example of SS setting information according to the second aspect.
  • FIG. 7 shows an example in which a predetermined SS set including a PDCCH candidate for monitoring DF1_x / 0_x is a USS set. In FIG. 7, the differences from FIG. 6 will be mainly described.
  • the SS setting information may include the setting information for the USS set (USS set setting information, for example, "UE-Specific" of RRC IE).
  • USS set setting information for example, "UE-Specific" of RRC IE.
  • the USS setting information may include the PDCCH candidate number information for DF1_x / 0_x (for example, "nrofCandidates-URLLC" of RRC IE).
  • FIG. 8 is a diagram showing a third example of SS setting information according to the second aspect.
  • FIG. 8 shows an example in which a predetermined SS set including a PDCCH candidate for monitoring DF1_x / 0_x is a USS set.
  • a predetermined SS set including a PDCCH candidate for monitoring DF1_x / 0_x is a USS set.
  • the differences from FIGS. 1, 6 and 7 will be mainly described.
  • the DCI format information (for example, “dci-Formats” of RRC IE) (see FIG. 1) is a monitor of DCI format 1_0 / 0_0, DCI format 1-11 / 0_1, or DCI format 1_x / 0_x. It may indicate whether it is used for.
  • the DCI format information when the DCI format information indicates DCI format 1_x / 0_x, the DCI format information includes the PDCCH candidate number information for DF1_x / 0_x (for example, "nrofCandidates-URLLC" of RRC IE). It may be.
  • FIG. 9 is a diagram showing an example of monitoring control according to the second aspect.
  • the differences from FIGS. 2 to 5 will be mainly described.
  • FIG. 9 differs from FIGS. 2-5 in that the predetermined SS set includes PDCCH candidates for monitoring DCI format 1_x / 0_x.
  • FIG. 9 shows an example in which the predetermined SS set is a USS set for DCI format 1_0 / 0_0 (here, SS set # 2), but the present invention is not limited to this.
  • the predetermined SS set may be a USS set for DCI format 1-1 / 0_1 (here, SS set # 3) or a CSS set (here, SS set # 1). ..
  • two PDCCH candidates in a predetermined SS set are monitored in the DCI format 1_x / 0_x, but the number of PDCCH candidates is not limited to this.
  • the plurality of PDCCH candidates for DCI format 1_x / 0_x may have at least a part of different aggregation levels or may have the same aggregation level.
  • the UE may monitor PDCCH candidates for DCI format 1_x / 0_x in SS set # 2.
  • the monitoring may be controlled based on at least one of the maximum number of PDCCH candidates that can be monitored per cell and per slot and the maximum number of non-overlapping CCEs.
  • the DCI format 1_x / 0_x even if the DCI format 1_x / 0_x is introduced, it is not necessary to set the SS set unique to the DCI format 1_x / 0_x. Therefore, it is possible to prevent an increase in SS sets that need to be monitored in the slot. Therefore, the probability of failure in monitoring the DCI format 1_x / 0_x can be reduced.
  • the monitoring priority of the DCI format 1_x / 0_x does not have to be defined and may depend on the UE implementation (up to UE implementation).
  • the first aspect and the second aspect may be combined.
  • the priority and SS of CORESET of the first aspect may be implemented based on at least one of the set priorities.
  • wireless communication system Wireless communication system
  • communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
  • FIG. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
  • the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • MR-DC is a dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and a dual connectivity between NR and LTE (NR-E).
  • -UTRA Dual Connectivity (NE-DC) may be included.
  • the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
  • the NR base station (gNB) is MN
  • the LTE (E-UTRA) base station (eNB) is SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
  • a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
  • NR-NR Dual Connectivity NR-DC
  • gNB NR base stations
  • the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
  • the user terminal 20 may be connected to at least one of the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
  • CA Carrier Aggregation
  • DC dual connectivity
  • CC Component Carrier
  • Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
  • the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
  • FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
  • the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
  • the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
  • wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the host station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
  • IAB Integrated Access Backhaul
  • relay station relay station
  • the base station 10 may be connected to the core network 30 via another base station 10 or directly.
  • the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
  • a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple. Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the wireless access method may be called a waveform.
  • another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
  • the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
  • downlink shared channels Physical Downlink Shared Channel (PDSCH)
  • broadcast channels Physical Broadcast Channel (PBCH)
  • downlink control channels Physical Downlink Control
  • Channel PDCCH
  • the uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • the uplink control channel Physical Uplink Control Channel (PUCCH)
  • the random access channel shared by each user terminal 20 are used.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
  • PDSCH User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
  • User data, upper layer control information, and the like may be transmitted by the PUSCH.
  • MIB Master Information Block
  • PBCH Master Information Block
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
  • DCI Downlink Control Information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • the PDSCH may be read as DL data
  • the PUSCH may be read as UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect the PDCCH.
  • CORESET corresponds to a resource for searching DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
  • One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set.
  • the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
  • channel state information (Channel State Information (CSI)
  • delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
  • scheduling request (Scheduling Request ( Uplink Control Information (UCI) including at least one of SR))
  • the PRACH may transmit a random access preamble for establishing a connection with the cell.
  • downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
  • the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • DeModulation Demodulation reference signal
  • Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
  • SS, SSB and the like may also be called a reference signal.
  • a measurement reference signal Sounding Reference Signal (SRS)
  • a demodulation reference signal DMRS
  • UL-RS Uplink Reference Signal
  • UE-specific Reference Signal UE-specific Reference Signal
  • FIG. 11 is a diagram showing an example of the configuration of the base station according to the embodiment.
  • the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
  • the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
  • the functional blocks of the feature portion in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
  • the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
  • the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
  • the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 120 processes, for example, the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer for data, control information, etc. acquired from the control unit 110 (for example,).
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
  • the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog transform, and other transmission processing.
  • IFFT inverse fast Fourier transform
  • the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
  • the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
  • the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, demapping, demodulating, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmission / reception unit 120 may perform measurement on the received signal.
  • the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
  • the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • propagation path information for example, CSI
  • the measurement result may be output to the control unit 110.
  • the transmission line interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
  • the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
  • the transmission / reception unit 120 transmits downlink control information.
  • the transmission / reception unit 120 may receive an uplink signal (for example, an uplink shared channel) and transmit a downlink signal (for example, a downlink shared channel).
  • the transmission / reception unit 120 transmits the setting information of the search space set.
  • the transmission / reception unit 120 may transmit at least one of the information indicating the priority of the control resource set and the information indicating the priority of the search space set (first aspect).
  • the transmission / reception unit 120 may transmit information regarding a part of the downlink control channel candidates in the search space set (second aspect).
  • the specific format may be a format different from the formats 1_0, 0_0, 1_1, 0_1, 2_0, 2_1, 2_2, 2_3.
  • FIG. 12 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
  • the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
  • the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
  • this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
  • the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
  • the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
  • the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
  • the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • RLC layer processing for example, RLC retransmission control
  • MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
  • HARQ retransmission control HARQ retransmission control
  • the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
  • Whether or not to apply the DFT process may be based on the transform precoding setting.
  • the transmission / reception unit 220 transmission processing unit 2211 described above for transmitting a channel (for example, PUSCH) using the DFT-s-OFDM waveform when the transform precoding is enabled.
  • the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
  • the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. to the radio frequency band on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
  • the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
  • the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmission / reception unit 220 may perform measurement on the received signal.
  • the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
  • the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control unit 210.
  • the transmission unit and the reception unit of the user terminal 20 in the present disclosure may be composed of at least one of the transmission / reception unit 220, the transmission / reception antenna 230, and the transmission line interface 240.
  • the transmission / reception unit 220 receives the downlink control information.
  • the transmission / reception unit 220 may transmit an uplink signal (for example, an uplink shared channel) and receive a downlink signal (for example, a downlink shared channel).
  • the transmission / reception unit 220 receives the setting information of the search space set.
  • the control unit 210 is based on the priority of the control resource set associated with the search space set, the priority of the search space set, and at least one of some downlink control channel candidates in the search space set. You may control the monitoring of downlink control information in a particular format.
  • the transmission / reception unit 220 may receive at least one of the information indicating the priority of the control resource set and the information indicating the priority of the search space set (first aspect).
  • the control unit 210 may derive the priority of the control resource set based on at least one of the type and identifier of the control resource set.
  • the control unit 210 may derive the priority of the search space set based on at least one of the type and identifier of the search space set.
  • the transmission / reception unit 220 may receive information regarding a part of the downlink control channel candidates in the search space set (second aspect).
  • the specific format may be a format different from the formats 1_0, 0_0, 1_1, 0_1, 2_0, 2_1, 2_2, 2_3.
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by using two or more physically or logically separated devices). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the method of realizing each of them is not particularly limited.
  • the base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 13 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
  • the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
  • the processor 1001 may be mounted by one or more chips.
  • the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission / reception unit 120 220
  • the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, hard disk drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). It may be configured to include.
  • the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the wireless frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
  • the subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
  • SCS subcarrier Spacing
  • TTI Transmission Time Interval
  • a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be called a sub slot. A minislot may consist of a smaller number of symbols than the slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
  • one subframe may be called TTI
  • a plurality of consecutive subframes may be called TTI
  • one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the neurology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
  • Physical RB Physical RB (PRB)
  • SCG sub-carrier Group
  • REG resource element group
  • the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a numerology in a carrier. May be good.
  • the common RB may be specified by an index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may be voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to another device.
  • Notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
  • the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.
  • DCI downlink control information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB master information block
  • SIB system information block
  • MAC medium access control
  • the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
  • the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
  • Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted to mean.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • Network may mean a device (eg, a base station) included in the network.
  • precoding "precoding weight”
  • QCL Quality of Co-Co-Location
  • TCI state Transmission Configuration Indication state
  • space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
  • Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
  • Base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission point (Transmission Point (TP))
  • RP Reception point
  • TRP Transmission / Reception Point
  • Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio). Communication services can also be provided by Head (RRH))).
  • RRH Head
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • communication between a base station and a user terminal has been replaced with communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the user terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the uplink, downlink, and the like may be read as side channels.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • the operation performed by the base station may be performed by its upper node (upper node) in some cases.
  • various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
  • Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
  • each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New-Radio Access Technology RAT
  • NR New Radio
  • NX New radio access
  • Future generation radio access FX
  • GSM Global System for Mobile communications
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • LTE 802.16 WiMAX (registered trademark)
  • a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).
  • references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
  • determining used in this disclosure may include a wide variety of actions.
  • judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
  • judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)” such as “accessing” (for example, accessing data in memory).
  • judgment (decision) is regarded as “judgment (decision)” of solving, selecting, choosing, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
  • the "maximum transmission power" described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal UE maximum transmit power, or may mean the rated maximum transmission power (the). It may mean rated UE maximum transmit power).
  • connection are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
  • the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.

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

Abstract

L'invention concerne un terminal utilisateur qui comprend : une unité de réception pour recevoir les informations de réglage d'un ensemble d'espaces de recherche; et une unité de commande pour surveiller des informations de commande de liaison descendante d'un format spécifique sur la base d'au moins l'un de la priorité d'un ensemble de ressources de commande associé à l'ensemble d'espaces de recherche, de la priorité de l'ensemble d'espaces de recherche, et de certains des canaux de commande de liaison descendante candidats dans l'ensemble d'espaces de recherche. Selon un mode de réalisation de la présente invention, la surveillance des informations de commande de liaison descendante peut être commandée de manière appropriée.
PCT/JP2019/014549 2019-04-01 2019-04-01 Terminal utilisateur et procédé de communication sans fil WO2020202448A1 (fr)

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CN114640428A (zh) * 2020-12-15 2022-06-17 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114666021A (zh) * 2020-12-23 2022-06-24 上海朗帛通信技术有限公司 一种用于无线通信的节点中的方法和装置

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CN114640428A (zh) * 2020-12-15 2022-06-17 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114640428B (zh) * 2020-12-15 2024-04-12 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN114666021A (zh) * 2020-12-23 2022-06-24 上海朗帛通信技术有限公司 一种用于无线通信的节点中的方法和装置
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CN113841347A (zh) * 2021-08-20 2021-12-24 北京小米移动软件有限公司 物理下行控制信道监测方法、装置及存储介质

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