WO2020121412A1 - Terminal utilisateur et procédé de communication radio - Google Patents

Terminal utilisateur et procédé de communication radio Download PDF

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Publication number
WO2020121412A1
WO2020121412A1 PCT/JP2018/045520 JP2018045520W WO2020121412A1 WO 2020121412 A1 WO2020121412 A1 WO 2020121412A1 JP 2018045520 W JP2018045520 W JP 2018045520W WO 2020121412 A1 WO2020121412 A1 WO 2020121412A1
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Prior art keywords
search space
monitoring
reference signal
space set
transmission
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PCT/JP2018/045520
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English (en)
Japanese (ja)
Inventor
一樹 武田
聡 永田
リフェ ワン
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2018/045520 priority Critical patent/WO2020121412A1/fr
Publication of WO2020121412A1 publication Critical patent/WO2020121412A1/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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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) is also under consideration.
  • 5G 5th generation mobile communication system
  • 5G+(plus) 5th generation mobile communication system
  • NR New Radio
  • 3GPP Rel.15 or later 3th generation mobile communication system
  • the user terminal In the existing LTE system (for example, 3GPP Rel. 8-14), the user terminal (User Equipment (UE)) has a UL data channel (for example, Physical Uplink Shared Channel (PUSCH)) and a UL control channel (for example, Physical Uplink).
  • PUSCH Physical Uplink Shared Channel
  • UL control channel for example, Physical Uplink
  • Control channel PUCCH
  • UCI Uplink Control Information
  • RLM Radio Link Monitoring
  • UE User Equipment
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • radio link monitoring Radio Link Monitoring (RLM)
  • RLM Radio Link Monitoring
  • the base station may set a radio link monitoring reference signal (Radio Link Monitoring RS (RLM-RS)) to the UE for each BWP by using upper layer signaling.
  • RLM-RS Radio Link Monitoring reference signal
  • the UE may use the RS provided for the active TCI state for PDCCH reception as the RLM-RS.
  • the UE determines the RLM-RS based on the search space set having the minimum monitoring period.
  • one of the purposes of the present disclosure is to provide a user terminal and a wireless communication method that can appropriately perform RLM.
  • a user terminal sets a search space set having a minimum monitoring period to a search space set configuration information when a first upper layer parameter related to a reference signal for radio link monitoring is not set.
  • a search in which the distance between two monitoring opportunities is the minimum based on the second upper layer parameter indicating the period and offset of the slot to be monitored and the third upper layer parameter indicating the symbol in the slot to be monitored.
  • a control unit that determines a space set and determines a reference signal for wireless link monitoring based on the search space set having the minimum monitoring period, and performs wireless link monitoring based on the determined reference signal.
  • a receiving unit that operates.
  • RLM can be appropriately implemented.
  • FIG. 1 is a diagram showing a part of the contents of the RRC information element “SearchSpace”.
  • 2A and 2B are diagrams illustrating an example of a search space set having a minimum monitoring period according to an embodiment.
  • 3A and 3B are diagrams illustrating another example of a search space set having a minimum monitoring period according to an embodiment.
  • FIG. 4 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 5 is a diagram illustrating an example of the configuration of the base station according to the embodiment.
  • FIG. 6 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment.
  • FIG. 7 is a figure which shows an example of the hardware constitutions of the base station and user terminal which concern on one Embodiment.
  • reception processing for example, reception, demapping, demodulation, and decoding
  • TCI state transmission configuration indication state
  • the TCI state is information related to signal/channel pseudo collocation (Quasi-Co-Location (QCL)), and may also be called spatial reception parameter, spatial relation information (spatial relation info), or the like.
  • QCL Quality of Co-Location
  • the TCI state may be set in the UE per channel or per signal.
  • QCL is an index showing the statistical properties of signals/channels. For example, when a certain signal/channel and another signal/channel have a QCL relationship, the Doppler shift, the Doppler spread, and the average delay (average delay) between these different signals/channels. ), delay spread, and spatial parameter (for example, spatial reception parameter (Spatial Rx Parameter)) are the same (meaning that at least one of them is QCL). You may.
  • the spatial reception parameter may correspond to the reception beam of the UE (for example, reception analog beam), and the beam may be specified based on the spatial QCL.
  • QCL or at least one element of QCL in the present disclosure may be read as sQCL (spatial QCL).
  • QCL types A plurality of types (QCL types) may be defined as the QCL.
  • QCL types A-D four QCL types A-D with different parameters (or parameter sets) that can be assumed to be the same may be provided, which parameters are shown below: QCL type A: Doppler shift, Doppler spread, average delay and delay spread, ⁇ QCL Type B: Doppler shift and Doppler spread, QCL type C: Doppler shift and average delay, QCL type D: spatial reception parameter.
  • QCL assumption The UE's assumption that a given CORESET, channel or reference signal has a specific QCL (eg, QCL type D) relationship with another CORESET, channel or reference signal is called QCL assumption. May be.
  • the UE may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal/channel based on the TCI state of the signal/channel or the QCL assumption.
  • the TCI state is, for example, a target channel (or a reference signal (Reference Signal (RS)) for the channel) and another signal (for example, another downlink reference signal (DL-RS)). It may be the information on the QCL.
  • the TCI state may be set (instructed) by upper layer signaling, physical layer signaling, or a combination thereof.
  • the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • Broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI Other System Information
  • the physical layer signaling may be downlink control information (Downlink Control Information (DCI)), for example.
  • DCI Downlink Control Information
  • the channel for which the TCI state is set is, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (PUSCH: Physical Uplink Shared Channel) ), and at least one of the uplink control channels (PUCCH: Physical Uplink Control Channel).
  • PDSCH Physical Downlink Shared Channel
  • PDCH Physical Downlink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • the RS having the QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), or a measurement reference signal (Sounding). It may be at least one of Reference Signal (SRS).
  • SSB Synchronization Signal Block
  • CSI-RS Channel State Information Reference Signal
  • Sounding a measurement reference signal
  • SRS Reference Signal
  • SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • the SSB may be referred to as an SS/PBCH block.
  • the TCI state information element (“TCI-state IE” of RRC) set by higher layer signaling may include one or more pieces of QCL information (“QCL-Info”).
  • the QCL information may include at least one of information regarding DL-RS (DL-RS related information) having a QCL relationship and information indicating a QCL type (QCL type information).
  • the DL-RS related information includes information such as a DL-RS index (eg, SSB index, non-zero power CSI-RS resource ID), an index of a cell in which the RS is located, and an index of Bandwidth Part (BWP) in which the RS is located. May be included.
  • TCI state for the PDCCH may be called the TCI state for the PDCCH.
  • PDCCH-related demodulation reference signal (DeModulation Reference Signal (DMRS)) antenna port may be called the TCI state for the PDCCH.
  • DMRS DeModulation Reference Signal
  • the UE may determine the TCI status for the UE-specific PDCCH (CORESET) based on higher layer signaling. For example, one or more (K) TCI states may be set for the UE for each CORESET by RRC signaling (ControlResourceSet information element).
  • the UE may activate one or more TCI states for each CORESET using MAC CE.
  • the MAC CE may be called TCI State Indication for UE-specific PDCCH MAC CE (TCI State Indication for UE-specific PDCCH MAC CE).
  • TCI State Indication for UE-specific PDCCH MAC CE TCI State Indication for UE-specific PDCCH MAC CE.
  • the UE may monitor CORESET based on the active TCI state corresponding to the CORESET.
  • RLM Radio Link Monitoring
  • the base station may set the radio link monitoring reference signal (Radio Link Monitoring RS (RLM-RS)) to the UE for each BWP using upper layer signaling.
  • RLM-RS Radio Link Monitoring RS
  • the UE may receive the configuration information for RLM (for example, the “RadioLinkMonitoringConfig” information element of RRC).
  • the setting information for the RLM may include failure detection resource setting information (for example, upper layer parameter “failureDetectionResourcesToAddModList”).
  • the fault detection resource setting information may include a parameter related to RLM-RS (for example, an upper layer parameter “RadioLinkMonitoringRS”).
  • the parameter related to the RLM-RS may include information indicating that it corresponds to the purpose of the RLM, an index corresponding to the resource of the RLM-RS (for example, an index included in the upper layer parameter “failureDetectionResources”), and the like. ..
  • the index may be, for example, an index for setting a CSI-RS resource (for example, non-zero power CSI-RS resource ID) or an SS/PBCH block index (SSB index).
  • the UE may specify the RLM-RS resource based on the index corresponding to the resource of the RLM-RS, and implement the RLM using the RLM-RS resource.
  • the UE if it is not provided with the above parameters (“RadioLinkMonitoringRS”) for RLM-RS (not configured by higher layer signaling), it provides TCI state including one or more CSI-RS for PDCCH reception. If so, the UE may use the RS provided for the active TCI state for PDCCH reception for RLM.
  • RadioLinkMonitoringRS RadioLinkMonitoringRS
  • N RLM RSs provided for the active TCI state for PDCCH reception may be selected as RSs for RLM.
  • the UE may determine CORESET in order from the largest CORESET index (or CORESET ID).
  • the UE selects the search space set having the minimum monitoring period among the search space sets related to CORESET, assuming that the search space set has the higher priority. Also, the UE selects the RLM-RS based on the larger CORESET ID CORESET if more than one CORESET corresponds to the same minimum monitoring period search space set.
  • the meaning of the search space set with the minimum monitoring period has not been clarified in the NR specifications so far. If these are not clearly specified, the base station and the UE may be inconsistent with respect to the “minimum monitoring period”, and the performance of the RLM may be degraded.
  • the inventors of the present invention came up with the idea of appropriately defining a search space set having a minimum monitoring period.
  • the UE determines the “search space set having the minimum monitoring period” based on at least one of the following (1) and (2) among the upper layer parameters included in the RRC information element “SearchSpace”. May be determined by: (1) “monitoringSlotPeriodicityAndOffset”, (2) “monitoringSlotPeriodicityAndOffset” and "monitoringSymbolsWithinSlot”.
  • FIG. 1 is a diagram showing a part of the contents of the RRC information element “SearchSpace”.
  • FIG. 1 shows ASN. It is described using the 1 (Abstract Syntax Notation One) notation.
  • One “Search Space” may include parameters related to one search space set.
  • the RRC information element "SearchSpace” includes a parameter "monitoringSlotPeriodicityAndOffset".
  • the parameter "monitoringSlotPeriodicityAndOffset” corresponds to the period and offset of the slot to be monitored, and can take the values Sl1, Sl2, Sl4,..., Sl2560.
  • the value "SlX” corresponds to a period X slot.
  • the parameter “monitoringSymbolsWithinSlot” is a 14-bit bit string and indicates a symbol for monitoring the PDCCH in the slot set by the above “monitoringSlotPeriodicityAndOffset”. The most significant bit represents the first symbol in the slot and the least significant bit represents the last symbol in the slot. The symbol whose bit value included in the bit string is "1" represents the CORESET symbol in the slot (in other words, the symbol to be monitored).
  • the UE may determine that a plurality of search space sets having the same “monitoringSlotPeriodicityAndOffset” value have the same monitoring period when determining the RLM-RS.
  • the "search space set with the smallest monitoring period” corresponds to the search space set with the smallest period indicated by "monitoringSlotPeriodicityAndOffset” and does not depend on the position of the monitoring opportunity in the slot (value of "monitoringSymbolsWithinSlot”). ..
  • “minimum monitoring period” “minimum monitoring slot period”.
  • the UE determines the minimum distance between two monitoring opportunities for each monitoring space (monitoring occurrence) determined based on “monitoringSlotPeriodicityAndOffset” and “monitoringSymbolsWithinSlot” for each search space set. Then, the UE may determine that the plurality of search space sets whose minimum distances have the same value have the same monitoring period when determining the RLM-RS. In this case, the "search space set with the smallest monitoring period" corresponds to the search space set with the smallest distance of monitoring opportunities.
  • FIG. 2A and 2B are diagrams showing an example of a search space set having a minimum monitoring period according to an embodiment.
  • 2A corresponds to (1) above
  • FIG. 2B corresponds to (2) above.
  • the UE is set with two search space sets (SS sets #1 and #2).
  • the SS set having the minimum monitoring cycle is SS set #1 having a shorter monitoring slot cycle.
  • the minimum distance between two monitoring opportunities of SS set #1 is 1 slot (14 symbols), and the minimum distance between two monitoring opportunities of SS set #2 is 7 symbols. Therefore, in the case of FIG. 2B, the SS set with the smallest monitoring period is SS set #2 with the shorter minimum distance of monitoring opportunities.
  • 3A and 3B are diagrams showing another example of the search space set having the minimum monitoring period according to the embodiment.
  • the UE is set with two search space sets (SS sets #1 and #2).
  • FIG. 3A corresponds to an example in which the two monitoring opportunities for minimum distance are not limited to monitoring opportunities within a slot (which may include distances across slots).
  • the minimum distance between two monitoring opportunities of SS set #1 is 1 symbol
  • the minimum distance between two monitoring opportunities of SS set #2 is 7 symbols. Therefore, in the case of FIG. 3A, the SS set with the smallest monitoring period is the SS set #1 with the shorter minimum distance of monitoring opportunities.
  • FIG. 3B corresponds to an example in which the two monitoring opportunities for obtaining the minimum distance are limited to the monitoring opportunities within the slot (not including the distance across the slots).
  • the minimum distance between two monitoring opportunities for SS set #1 is 13 symbols
  • the minimum distance between two monitoring opportunities for SS set #2 is 7 symbols. Therefore, in the case of FIG. 3B, the SS set having the smallest monitoring period is the SS set #2 having a shorter minimum distance of monitoring opportunities.
  • the SS set having the minimum monitoring period is the same as both SS set #1 and SS set #2. Become.
  • minimum monitoring period may also include the phrase “minimum monitoring period”.
  • the “minimum monitoring cycle” for other than the RLM may be determined in the same manner as in the above embodiment.
  • the UE has the same value as the RS index in the RS set indicated by the TCI state of CORESET used for monitoring the PDCCH when the beam failure detection resource is not set.
  • the index of certain periodic CSI-RS resource settings may be used for beam obstruction detection.
  • the UE may select (determine) the CORESET based on the size of the monitoring cycle of the search space set related to CORESET. The size of the monitoring cycle may be determined in the same manner as the above-mentioned "minimum monitoring cycle".
  • 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. 4 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 by 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 (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs).
  • MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) with LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) with NR and LTE.
  • E-UTRA-NR Dual Connectivity EN-DC
  • NR-E dual connectivity
  • NE-DC Dual Connectivity
  • the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between a plurality of base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) may be supported.
  • dual connectivity NR-NR Dual Connectivity (NN-DC)
  • N-DC dual connectivity
  • MN and SN are NR base stations (gNB).
  • the radio communication system 1 includes a base station 11 forming a macro cell C1 having a relatively wide coverage and a base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. You may prepare.
  • the user terminal 20 may be located in at least one cell. The arrangement and the number of each cell and user terminal 20 are not limited to those 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)) using multiple component carriers (Component Carrier (CC)) and dual connectivity (DC).
  • CA Carrier Aggregation
  • CC Component Carrier
  • DC dual connectivity
  • Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
  • 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 higher frequency band than FR2.
  • the user terminal 20 may communicate with each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).
  • 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 the base stations 11 and 12, the base station 11 corresponding to the upper station is the Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is the 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 of, for example, 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 compatible with at least one of communication methods such as LTE, LTE-A, and 5G.
  • an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) based wireless access method may be used.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DL Downlink
  • UL Uplink
  • 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.
  • other wireless access methods such as another single carrier transmission method and another multicarrier transmission method may be used as the UL and DL wireless access methods.
  • downlink shared channels Physical Downlink Shared Channel (PDSCH)
  • broadcast channels Physical Broadcast Channel (PBCH)
  • downlink control channels Physical Downlink Control
  • an uplink shared channel Physical Uplink Shared Channel (PUSCH)
  • an uplink control channel Physical Uplink Control Channel (PUCCH)
  • a random access channel that are shared by each user terminal 20.
  • Physical Random Access Channel (PRACH) Physical Random Access Channel
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
  • User data, upper layer control information, and the like may be transmitted by the PUSCH.
  • the Master Information Block (MIB) may be transmitted by the PBCH.
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH, for example.
  • DCI Downlink Control Information
  • the DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI for scheduling PUSCH may be called UL grant, UL DCI, etc.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (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 a search area and a search method for PDCCH candidates (PDCCH candidates).
  • a CORESET may be associated with one or more search spaces. The UE may monitor 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. Note that 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 eg, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • scheduling request Scheduling Request (Scheduling Request ( (SR)
  • uplink control information Uplink Control Information (UCI)
  • a random access preamble for establishing a connection with a cell may be transmitted by the PRACH.
  • downlink, uplink, etc. may be expressed without adding “link”. Further, it may be expressed without adding "Physical" to the head of each channel.
  • a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted.
  • a cell-specific reference signal Cell-specific Reference Signal (CRS)
  • a channel state information reference signal Channel State Information Reference Signal (CSI-RS)
  • CSI-RS Channel State Information Reference Signal
  • DMRS Demodulation reference signal
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)), for example.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS/PBCH block, SS Block (SSB), or the like. Note that SS and SSB may also be referred to as reference signals.
  • the wireless communication system even if the measurement reference signal (Sounding Reference Signal (SRS)), the demodulation reference signal (DMRS), etc. are transmitted as the uplink reference signal (Uplink Reference Signal (UL-RS)). Good.
  • the DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).
  • FIG. 5 is a diagram illustrating 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. It should be noted that the control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140 may each be provided with one or more.
  • the functional blocks of the characteristic part 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 unit described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be configured by a controller, a control circuit, and the like described based on 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 using the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140, measurement, and the like.
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer the generated 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, radio resource management, 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, etc., which are explained based on common knowledge in the technical field of the present disclosure. be able to.
  • the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit.
  • the transmission unit may include a transmission processing unit 1211 and an RF unit 122.
  • the receiving unit may include a reception processing unit 1212, an RF unit 122, and a measuring unit 123.
  • the transmission/reception antenna 130 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
  • the transmitting/receiving unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transceiver 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), or the like.
  • digital beamforming for example, precoding
  • analog beamforming for example, phase rotation
  • the transmission/reception unit 120 processes the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer (for example, for the data and control information acquired from the control unit 110) (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) on the bit string to be transmitted. Processing (if necessary), inverse fast Fourier transform (Inverse Fast Transform (IFFT)) processing, precoding, digital-analog conversion, and other transmission processing may be performed to output the baseband signal.
  • channel coding which may include error correction coding
  • modulation modulation
  • mapping mapping
  • filtering discrete Fourier transform
  • DFT discrete Fourier Transform
  • IFFT inverse fast Fourier transform
  • precoding coding
  • digital-analog conversion digital-analog conversion
  • the transmitter/receiver 120 may modulate the baseband signal into a radio frequency band, perform filter processing, amplify, and the like, and transmit the radio frequency band signal via the transmission/reception antenna 130. ..
  • the transmission/reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc., on a 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 (Fast Fourier Transform (FFT)) processing, and inverse discrete Fourier transform (Inverse Discrete Fourier Transform (IDFT) on the acquired baseband signal. )) Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, User data or the like may be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmission/reception unit 120 may perform measurement on the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
  • the measurement unit 123 receives power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
  • Signal strength for example, Received Signal Strength Indicator (RSSI)
  • channel information for example, CSI
  • the measurement result may be output to the control unit 110.
  • the transmission path interface 140 transmits/receives signals (backhaul signaling) to/from devices included in the core network 30, other base stations 10, and the like, and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.
  • the transmission unit and the reception unit of the base station 10 may be configured by at least one of the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140.
  • the transmitter/receiver 120 may also transmit a reference signal (eg, CSI-RS, SSB) for wireless link monitoring.
  • the transmitting/receiving unit 120 may transmit the search space set setting information, the first upper layer parameter, the second upper layer parameter, the third upper layer parameter, and the like to the user terminal 20. These parameters will be described later.
  • FIG. 6 is a diagram illustrating 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 include one or more.
  • the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 may be assumed to also have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the controller 210 may control transmission/reception, measurement, etc. using the transmitter/receiver 220 and the transmitting/receiving antenna 230.
  • the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer the data to the transmission/reception unit 220.
  • the transmitting/receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measuring unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transmitter/receiver 220 may include a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.
  • the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit.
  • the transmission unit may include a transmission processing unit 2211 and an RF unit 222.
  • the receiving unit may include a reception processing unit 2212, an RF unit 222, and a measuring unit 223.
  • the transmission/reception antenna 230 can be configured by an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
  • the transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmitter/receiver 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 220 processes the PDCP layer, the RLC layer (for example, RLC retransmission control), and the MAC layer (for example, for the data and control information acquired from the control unit 210). , HARQ retransmission control) may be performed to generate a bit string to be transmitted.
  • the transmission/reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), and IFFT processing on the bit string to be transmitted.
  • the baseband signal may be output by performing transmission processing such as precoding, digital-analog conversion, or the like.
  • the transmission/reception unit 220 transmits the channel using a DFT-s-OFDM waveform when transform precoding is enabled for the channel (for example, PUSCH).
  • the DFT process may be performed as the transmission process, or otherwise, the DFT process may not be performed as the transmission process.
  • the transmission/reception unit 220 may perform modulation, filtering, amplification, etc. on the radio frequency band for the baseband signal, and transmit the radio frequency band signal via the transmission/reception antenna 230. ..
  • the transmission/reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc., on the signal in the radio frequency band received by the transmission/reception antenna 230.
  • the transmitting/receiving unit 220 (reception processing unit 2212) performs analog-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the acquired baseband signal.
  • User data and the like may be acquired by applying reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing.
  • the transmission/reception unit 220 may measure the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
  • the measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel 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 may be configured by at least one of the transmission/reception unit 220 and the transmission/reception antenna 230.
  • control part 210 monitors the search space set which has the minimum monitoring period among the setting information of a search space set, when the 1st upper layer parameter regarding the reference signal for radio link monitoring is not set.
  • a reference signal for radio link monitoring may be determined based on the search space set having the minimum monitoring period.
  • the setting information of the search space set may be the RRC information element "SearchSpace”.
  • the first upper layer parameter may be an RRC parameter “RadioLinkMonitoringRS”.
  • the second upper layer parameter may be the RRC parameter “monitoringSlotPeriodicityAndOffset”.
  • the third upper layer parameter may be the RRC parameter “monitoringSymbolsWithinSlot”.
  • control unit 210 may assume that the above-mentioned two monitoring opportunities include monitoring opportunities in different slots, or may assume that they are monitoring opportunities in the same slot.
  • the control unit 210 selects the search space set having the minimum monitoring period from among the setting information of the search space set of the slot to be monitored. It is determined that the search space set has the smallest monitoring slot period based only on the second upper layer parameter indicating the period and the offset, and for the radio link monitoring based on the search space set having the smallest monitoring period.
  • the reference signal may be determined.
  • the transmitter/receiver 220 may perform wireless link monitoring based on the reference signal determined by the controller 210 as described above.
  • each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices.
  • the functional blocks may be realized by combining the one device or the plurality of devices with software.
  • 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 consideration. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the implementation method is not particularly limited.
  • the base station, the user terminal, and the like may function as a computer that performs the process of the wireless communication method of the present disclosure.
  • FIG. 7 is a figure which shows an example of the hardware constitutions of the base station and user terminal which concern on one 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 terms such as a device, a circuit, a device, a section, and a unit are interchangeable with each other.
  • the hardware configurations of the 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.
  • the processor 1001 For each function in the base station 10 and the user terminal 20, for example, the processor 1001 performs an arithmetic operation by loading predetermined software (program) on hardware such as the processor 1001, the memory 1002, and the communication via the communication device 1004. Is controlled, and at least one of reading and writing of data in the memory 1002 and the storage 1003 is controlled.
  • predetermined software program
  • the processor 1001 operates an operating system to control the entire computer, 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 control unit 110 (210) and the transmission/reception unit 120 (220) described above may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), software module, data, and the like 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 implemented by a control program stored in the memory 1002 and operating in the processor 1001, and may be implemented similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium, and for example, at least Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other appropriate storage media. 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 may store an executable program (program code), a software module, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray (registered trademark) disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium. May be configured by The storage 1003 may be called an auxiliary storage device.
  • a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray (registered trademark) disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or
  • the communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 for example, realizes at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. May be included.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission/reception unit 120 (220) and the transmission/reception antenna 130 (230) described above may be realized by the communication device 1004.
  • the transmitter/receiver 120 (220) may be physically or logically separated from the transmitter 120a (220a) and the receiver 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 performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured 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 (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 part or all of each functional block may be realized by 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
  • CMOS complementary metal-oxide-semiconductor
  • CC component carrier
  • a radio frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) forming 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 numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • the 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 radio frame configuration. , At least one of a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.
  • a slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be composed of fewer symbols than slots.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be referred to as PDSCH (PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent the time unit for transmitting signals. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them. It should be noted that time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be replaced with each other.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be
  • the unit representing the TTI may be called a slot, a minislot, etc. instead of a subframe.
  • TTI means, for example, the minimum time unit of scheduling in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) 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), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like.
  • the time interval for example, the number of symbols
  • the transport block, code block, codeword, etc. may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
  • the TTI shorter than the 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, a subslot, a slot, and the like.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and a short TTI (eg, 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 included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may be configured by one or a plurality of resource blocks.
  • one or more RBs are physical resource blocks (Physical RB (PRB)), subcarrier groups (Sub-Carrier Group (SCG)), resource element groups (Resource Element Group (REG)), PRB pairs, RBs. It may be called a pair or the like.
  • PRB Physical RB
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • the resource block may be composed of one or more resource elements (Resource Element (RE)).
  • RE resource Element
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • Bandwidth Part (may be called partial bandwidth etc.) represents a subset of continuous common RBs (common resource blocks) for a certain neurology in a certain carrier. Good.
  • the common RB may be specified by the index of the RB based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP for UL 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 does not have to assume that it will send and receive predetermined signals/channels outside the active BWP.
  • BWP bitmap
  • the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, and included in RBs The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be variously changed.
  • the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented.
  • radio resources may be indicated by a predetermined index.
  • Information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of
  • Information and signals can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
  • Information, signals, etc. may be input and 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. Information, signals, etc. that are input and output can be overwritten, updated or added. The output information, signal, etc. may be deleted. The input information, signal, etc. may be transmitted to another device.
  • notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method.
  • notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), upper layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (Master Information Block (MIB)), system information block (System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof May be implemented 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 called 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.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
  • CE MAC Control Element
  • the notification of the predetermined information is not limited to the explicit notification, and may be implicitly (for example, by not notifying the predetermined information or another information). May be carried out).
  • 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. , May be performed by comparison of numerical values (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • the software uses websites that use at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) , Servers, or other remote sources, these wired and/or wireless technologies are included within the definition of transmission media.
  • wired technology coaxial cable, optical fiber 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”, “precoder”, “weight (precoding weight)”, “pseudo-collocation (Quasi-Co-Location (QCL))”, “Transmission Configuration Indication state (TCI 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. Can be used for
  • base station BS
  • wireless base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)", “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • Cell Cell
  • femto cell small cell
  • pico cell femto cell
  • a base station can accommodate one or more (eg, 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 defined by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))) to provide communication services.
  • a base station subsystem for example, a small indoor base station (Remote Radio Head (RRH))
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or a base station subsystem providing communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is 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 terminal, remote terminal. , 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 transmission device, a reception device, a wireless communication device, or the like.
  • 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).
  • At least one of the base station and the mobile station also includes a device that does not necessarily move during a 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 replaced by the user terminal.
  • the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (eg, may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • the user terminal 20 may have the function of the above-described base station 10.
  • the words such as “up” and “down” may be replaced with the words corresponding to the communication between terminals (for example, “side”).
  • the uplink channel and the downlink channel may be replaced with the side channel.
  • the user terminal in the present disclosure may be replaced by the base station.
  • the base station 10 may have the function of the user terminal 20 described above.
  • the operation performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal include a base station and one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. are conceivable, but not limited to these) or a combination of these is clear.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be used by switching according to execution. Further, the order of the processing procedures, sequences, flowcharts, and the like 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 this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New-Radio Access Technology RAT
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM Global System for Mobile communications
  • CDMA2000 CDMA2000
  • Ultra Mobile Broadband UMB
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.11 WiMAX (registered trademark)
  • IEEE 802.11 WiMAX (registered trademark)
  • IEEE 802.11 WiMAX (registered trademark)
  • Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using any other suitable wireless communication method, and a next-generation system extended based on these may be applied.
  • a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).
  • 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 in this disclosure does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to 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 any way.
  • determining may encompass a wide variety of actions.
  • judgment means “judging", “calculating”, “computing”, “processing”, “deriving”, “investigating”, “searching” (looking up, search, inquiry) ( For example, it may be considered to be a “decision” for a search in a table, database or another data structure), ascertaining, etc.
  • “decision” means receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access (access). Accessing (eg, accessing data in memory), etc., may be considered to be a “decision.”
  • judgment (decision) is considered to be “judgment (decision)” of resolving, selecting, choosing, establishing, establishing, comparing, etc. Good. That is, “determination (decision)” may be regarded as “determination (decision)” of some operation.
  • connection refers to any direct or indirect connection or coupling between two or more elements. And can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • radio frequency domain microwave Regions
  • electromagnetic energy having wavelengths in the light (both visible and invisible) region, etc. can be used to be considered “connected” or “coupled” to each other.
  • 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”.
  • the terms “remove”, “coupled” and the like may be construed as “different” as well.

Landscapes

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

Abstract

Un terminal d'utilisateur selon un mode de réalisation de la présente invention est caractérisé en ce qu'il comprend : une unité de commande qui, dans des cas où un premier paramètre de couche supérieure se rapportant à un signal de référence pour une surveillance de liaison radio n'a pas été défini, détermine que l'ensemble d'espace de recherche ayant la périodicité de surveillance la plus courte est l'ensemble d'espaces de recherche ayant l'intervalle le plus court entre deux occasions de surveillance sur la base d'un deuxième paramètre de couche supérieure exprimant la périodicité et le décalage d'un intervalle surveillé et un troisième paramètre de couche supérieure exprimant les symboles à l'intérieur de l'intervalle surveillé, lesdits paramètres étant inclus dans des informations de réglage pour l'ensemble d'espace de recherche, et détermine le signal de référence pour une surveillance de liaison radio sur la base dudit ensemble d'espace de recherche ayant la périodicité de surveillance la plus courte ; et une unité de réception qui met en œuvre une surveillance de liaison radio sur la base du signal de référence identifié. Ledit mode de réalisation de la présente invention permet d'implémenter RLM correctement.
PCT/JP2018/045520 2018-12-11 2018-12-11 Terminal utilisateur et procédé de communication radio WO2020121412A1 (fr)

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CN114257358A (zh) * 2020-09-24 2022-03-29 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
CN114696981A (zh) * 2020-12-31 2022-07-01 维沃移动通信有限公司 Pdcch监测能力的处理方法、终端及网络侧设备
US11457464B2 (en) * 2019-09-20 2022-09-27 Qualcomm Incorporated Carrier-group based cross-slot scheduling adaptation

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US11457464B2 (en) * 2019-09-20 2022-09-27 Qualcomm Incorporated Carrier-group based cross-slot scheduling adaptation
CN114257358A (zh) * 2020-09-24 2022-03-29 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
CN114696981A (zh) * 2020-12-31 2022-07-01 维沃移动通信有限公司 Pdcch监测能力的处理方法、终端及网络侧设备

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