WO2020035955A1 - ユーザ端末および無線通信方法 - Google Patents

ユーザ端末および無線通信方法 Download PDF

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Publication number
WO2020035955A1
WO2020035955A1 PCT/JP2018/030585 JP2018030585W WO2020035955A1 WO 2020035955 A1 WO2020035955 A1 WO 2020035955A1 JP 2018030585 W JP2018030585 W JP 2018030585W WO 2020035955 A1 WO2020035955 A1 WO 2020035955A1
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Prior art keywords
user terminal
downlink
channel
reception
reference signal
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PCT/JP2018/030585
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English (en)
French (fr)
Japanese (ja)
Inventor
祐輝 松村
浩樹 原田
真哉 岡村
聡 永田
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株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to CN201880096629.7A priority Critical patent/CN112586054B/zh
Priority to PCT/JP2018/030585 priority patent/WO2020035955A1/ja
Publication of WO2020035955A1 publication Critical patent/WO2020035955A1/ja

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a user terminal and a radio communication method in a next-generation mobile communication system.
  • a user terminal In an existing LTE system (for example, Rel. 8-14), a user terminal (User Equipment (UE)) measures a channel state using a predetermined reference signal or a resource for the reference signal.
  • the reference signal for channel state measurement may be called CSI-RS (Channel ⁇ State ⁇ Information ⁇ Reference ⁇ Signal) or the like (Non-Patent Document 1).
  • NR New Radio
  • eMBB enhanced Mobile Broadband
  • mMTC massive Machine Type Communications
  • URLLC Ultra-Reliable @ and @ Low-Latency @ Communications
  • a user terminal uses a symbol in which a reference signal for measurement (for example, CSI-RS or a synchronization signal block (Synchronization Signal Block (SSB))) is set, and a physical resource (for example, Physical Downlink Control Channel (PDCCH)). ), It is not assumed (unexpected) that transmission / reception of Physical Downlink Shared Channel (PDSCH) is set. That is, simultaneous reception of a measurement reference signal (for example, CSI-RS or SSB) and a downlink channel (PDCCH or PDSCH) has not been sufficiently studied.
  • a reference signal for measurement for example, CSI-RS or SSB
  • a downlink channel for example, CSI-RS or SSB
  • a reference signal for measurement (for example, CSI-RS or SSB) is set, paying particular attention to a case where URLLC is set.
  • An object is to provide a user terminal and a radio communication method that can appropriately control a reception operation when reception of a downlink channel (PDCCH or PDSCH) is set by a symbol.
  • PDCH downlink channel
  • One aspect of the user terminal according to the present invention is a receiving unit that receives a predetermined reference signal and a downlink channel, and, when the reference signal and the downlink channel are set to the same time resource, a predetermined modulation and coding scheme (MCS A) a controller that controls reception of the reference signal and the downlink channel according to whether downlink transmission using a table can be set.
  • MCS A modulation and coding scheme
  • a downlink channel (PDCCH or PDSCH) is set with a symbol in which a measurement reference signal (for example, CSI-RS or SSB) is set.
  • a measurement reference signal for example, CSI-RS or SSB
  • FIGS. 1A and 1B are diagrams illustrating an example of the MCS tables 1 and 2.
  • FIG. FIG. 4 is a diagram illustrating an example of an MCS table 3.
  • FIG. 3 is a diagram illustrating an example of a structure for determining an MCS table applied by a user terminal.
  • FIG. 9 is a diagram illustrating an example of a condition under which a URLLC can be set.
  • FIG. 9 is a diagram illustrating an example of a condition under which a URLLC can be set.
  • FIG. 9 is a diagram illustrating an example of a condition under which a URLLC can be set.
  • 7A and 7B are diagrams illustrating an example of a scenario assumed for a user terminal that can simultaneously receive a plurality of beams.
  • FIG. 1 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a wireless base station according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a baseband signal processing unit of a wireless base station.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a user terminal according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a baseband signal processing unit of a user terminal.
  • FIG. 2 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
  • the TCI state is information on pseudo-colocation (Quasi-Co-Location (QCL)) of a channel or a signal, and is also called a spatial reception parameter, spatial information (spatialpatinfo), or the like.
  • the TCI state is specified to the user terminal for each channel or for each signal.
  • the user terminal may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of each channel based on the TCI state specified for each channel.
  • the pseudo collocation is an index indicating the statistical property of at least one of a channel and a signal (channel / signal). If one signal or channel and another signal or channel are in a pseudo-colocation (QCL) relationship, Doppler shift, Doppler spread, average delay, delay spread, or space between these different signals or channels It may mean that at least one of the parameters (eg, spatial reception parameters) can be assumed to be the same (QCL for at least one of these).
  • the spatial reception parameter may correspond to a reception beam (Rx beam) (for example, a reception analog beam) of the user terminal, and the beam may be specified based on the spatial QCL.
  • Rx beam reception beam
  • QCL and at least one element of QCL in the present disclosure may be replaced with sQCL (spatialpatQCL).
  • QCL pseudo collocation
  • a plurality of QCL types may be defined. For example, four QCL types (QCL type A to QCL type D) with different parameters or parameter sets that can be assumed to be the same may be provided.
  • QCL type A is a QCL in which Doppler shift, Doppler spread, average delay and delay spread can be assumed to be the same.
  • QCL type B is a QCL for which Doppler shift and Doppler spread can be assumed to be the same.
  • QCL Type C is a QCL that can assume that the average delay and Doppler shift are the same.
  • QCL type D is a QCL that can assume that the spatial reception parameters are the same.
  • the QCL information for each channel may include (or indicate) at least one of the following information: -Information indicating the above QCL type (QCL type information) -Information (RS information) on reference signals (Reference Signals (RS)) that have a QCL relationship with each channel -Information indicating the carrier (cell) where the reference signal (RS) is located-Information indicating the bandwidth part (Bandwidth Part (BWP)) where the reference signal (RS) is located-Spatial reception parameters (for example, Information indicating a reception beam (Rx beam).
  • URLLC Ultra-Reliable and Low-Latency Communications
  • MCS modulation and coding schemes
  • RNTI Radio Network Temporary Identifier
  • MCS RNTI Radio Network Temporary Identifier
  • DCI Downlink Control Information
  • the modulation scheme or modulation order of the physical shared channel scheduled by the DCI and Controlling at least one of the coding rates (modulation order / coding rate) is being studied.
  • the user terminal controls the PDSCH reception process based on the MCS field included in DCI (for example, DCI format 1_0, DCI format 1_1) for scheduling a downlink shared channel (Physical Downlink Shared Channel (PDSCH)).
  • MCS field included in DCI for example, DCI format 1_0, DCI format 1_1 for scheduling a downlink shared channel (Physical Downlink Shared Channel (PDSCH)
  • the user terminal includes a table (also referred to as an MCS table) in which an MCS index, a modulation order (modulation @ order) and a coding rate (code @ rate) are associated with each other, and an MCS index specified by DCI.
  • the PDSCH is received.
  • the user terminal performs PUSCH transmission based on the MCS table and the MCS index specified by DCI for scheduling the uplink shared channel (Physical Uplink Shared Channel (PUSCH)).
  • PUSCH Physical Uplink Shared Channel
  • Each modulation order is a value corresponding to each modulation method.
  • the modulation order of QPSK Quadrature ⁇ Phase ⁇ Shift ⁇ Keying
  • the modulation order of 16QAM Quadrature ⁇ Amplitude ⁇ Modulation
  • the modulation order of 64QAM corresponds to 6
  • the modulation order of 256QAM corresponds to 8.
  • FIG. 1 is a diagram illustrating an example of the MCS table.
  • the values in the MCS table shown in FIG. 1 are merely examples, and are not limited thereto. Further, some items (for example, spectrum efficiency) associated with the MCS index ( IMCS ) may be omitted, or other items may be added.
  • QPSK, 16QAM and 64QAM are defined as modulation orders.
  • QPSK, 16QAM, 64QAM, and 256QAM are defined as modulation orders.
  • the minimum coding rate (MCS index 0) is defined to be 120 ( ⁇ 1024).
  • the MCS table in FIG. 1A may be called MCS table 1 for PDSCH, 64QAM table, or qam64.
  • the MCS table of FIG. 1B may be called MCS table 2, 256 QAM table for PDSCH, or qam256.
  • the 64QAM table and the 256QAM table shown in FIG. 1 are also defined in the existing LTE system.
  • a case for example, URLLC
  • lower delay and higher reliability are required than the existing LTE system.
  • Fig. 2 shows an example of a new MCS table.
  • the values in the MCS table shown in FIG. 2 are merely examples, and are not limited thereto.
  • QPSK, 16QAM and 64QAM are defined as modulation orders, and are defined such that the minimum coding rate (MCS index 0) is 30 ( ⁇ 1024).
  • the MCS table of FIG. 2 may be called MCS table 3 for PDSCH, new MCS table, or qam64LowSE.
  • the new MCS table (MCS table 3) has a coding rate (for example, 120) lower than the minimum coding rate (for example, 120) specified in the MCS tables (MCS table 1, MCS table 2) shown in FIG. , 30) may be a defined table.
  • the MCS table 3 may be a table in which the coding rate at the same MCS index is set lower when compared with the MCS table 1 or the MCS table 2.
  • the user terminal may select the MCS table used for determining the PDSCH modulation order / coding rate based on at least one of the following conditions (1) to (3).
  • Presence or absence of setting of a predetermined RNTI new RNTI, for example, mcs-C-RNTI
  • MCS table information Notification of information specifying the MCS table
  • At least DCI or PDCCH
  • PDSCH RNTI type applied to one type of Cyclic Redundancy Check (CRC) scrambling
  • the MCS table information may be information specifying any one of the MCS table 1, the MCS table 2 (for example, qam256), or the MCS table 3 (for example, qam64LowSE).
  • the MCS table information may be information specifying either the MCS table 2 (for example, qam256) or the MCS table 3 (for example, qam64LowSE).
  • the user terminal controls the reception of the PDSCH by applying the MSC table 2.
  • the user terminal may determine the MCS table to be applied based on the search space type used for DCI transmission.
  • MCS table 3 for example, qam64LowSE
  • FIG. 3 is a diagram showing an example of a structure for determining an MCS table applied by a user terminal.
  • RRC-configured MCS table means an MCS table set in a higher layer (for example, RRC (Radio Resource Control) signaling), and includes MCS table 1 (qam64), MCS table 2 (qam256), Alternatively, it indicates one of the MCS tables 3 (qam64LowSE).
  • RRC-configured @ RNTI means an RNTI type set in a higher layer (for example, RRC signaling)
  • C means C-RNTI
  • new means new RNTI.
  • RNTI @ scrambling @ DCI means an RNTI type applied to scramble the DCI CRC
  • C means C-RNTI
  • new means new RNTI.
  • DCI @ format means DCI transmitted in the search space
  • 1_0 means DCI format 1_0
  • 1_1 means DCI format 1_1.
  • Search @ space means a search space for transmitting DCI
  • Common means a common search space
  • UE means a UE-specific search space.
  • Usersed @ MCS @ table means an applicable MCS table, and indicates any one of MCS table 1 (qam64), MCS table 2 (qam256), or MCS table 3 (qam64LowSE). The same applies to FIG. 4, FIG. 5, or FIG.
  • the user terminal transmits an MCS table and an RNTI type set in an upper layer (for example, RRC signaling), an RNTI type applied to DCI scrambling, a DCI format, and a search in which the DCI is transmitted.
  • the MCS table to be applied may be determined based on the space.
  • an MCS table 1 (eg, qam64) is set in an upper layer (eg, RRC signaling), and a C-RNTI (Cell-RNTI) or If a new RNTI is set, the CRC of the DCI is scrambled with the new RNTI, and the DCI (DCI format 1_0 or DCI format 1_1) is transmitted in a common search space or UE-specific search space, a new MCS table (MCS table 3, for example, qam64LowSE) is applied. In this case, the user terminal receives the PDSCH using the new MCS table (MCS table 3, for example, qam64LowSE).
  • MCS table 3 for example, qam64LowSE
  • an MCS table 2 (eg, qam256) is set in an upper layer (eg, RRC signaling), and a C-RNTI or a new RNTI is set in an upper layer (eg, RRC signaling).
  • a C-RNTI or a new RNTI is set in an upper layer (eg, RRC signaling).
  • MCS table 3 eg, qam64LowSE
  • the user terminal receives the PDSCH using the new MCS table (MCS table 3, for example, qam64LowSE).
  • an MCS table 3 (eg, qam64LowSE) is set in an upper layer (eg, RRC signaling), and a C-RNTI or a new RNTI is set in an upper layer (eg, RRC signaling).
  • a C-RNTI or a new RNTI is set in an upper layer (eg, RRC signaling).
  • MCS table 3 eg, qam64LowSE
  • the user terminal receives the PDSCH using the new MCS table (MCS table 3, for example, qam64LowSE).
  • the user terminal sets MCS table 3 (eg, qam64LowSE) in a higher layer (eg, RRC signaling), sets C-RNTI in a higher layer (eg, RRC signaling), and sets DCI If the CRC is scrambled with C-RNTI and DCI (DCI format 1_0) is transmitted in the UE-specific search space, apply a new MCS table (MCS table 3, eg, qam64LowSE). In this case, the user terminal receives the PDSCH using the new MCS table (MCS table 3, for example, qam64LowSE).
  • MCS table 3 eg, qam64LowSE
  • the user terminal sets MCS table 3 (eg, qam64LowSE) in a higher layer (eg, RRC signaling), sets C-RNTI in a higher layer (eg, RRC signaling), and sets DCI If the CRC is scrambled in the C-RNTI and the DCI (DCI format 1_1) is sent in the common search space or the UE-specific search space, apply the new MCS table (MCS table 3, eg, qam64LowSE). In this case, the user terminal receives the PDSCH using the new MCS table (MCS table 3, for example, qam64LowSE).
  • MCS table 3 eg, qam64LowSE
  • MCS tables may be separately set.
  • MCS table 3 For a PDSCH transmitted by semi-persistent scheduling (Semi-Persistent @ Scheduling, DL-SPS), whether a new MCS table (MCS table 3, for example, qam64LowSE) is set by an upper layer parameter (for example, mcs-Table) May be notified.
  • MCS table 3 for example, qam64LowSE
  • an upper layer parameter for example, mcs-Table
  • future wireless communication systems eg, NR
  • NR future wireless communication systems
  • a new MCS table with a lower coding rate, assuming various use cases (eg, URLLC) with different requirements.
  • At least one of the downlink (DL) transmission and the uplink (UL) transmission applying the new MCS table is a URLLC.
  • a synchronization signal block (Synchronization Signal Block (SSB)
  • SSB Synchronization Signal Block
  • the synchronization signal block may be a signal block including a synchronization signal and a broadcast channel.
  • the signal block may be called an SS / PBCH block.
  • 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 user terminal sets that transmission / reception of physical resources (eg, PDCCH, PDSCH, PUCCH, PUSCH) is set using a symbol in which a measurement reference signal (eg, CSI-RS or SSB) is set.
  • a measurement reference signal eg, CSI-RS or SSB
  • CSI-RS or SSB CSI-RS or SSB
  • the simultaneous reception of the reference signal for measurement (for example, CSI-RS or SSB) and the downlink channel (PDCCH or PDSCH) is at least partially overlapped by the user terminal in time resources (for example, symbols). Receiving the measurement reference signal and the downlink channel.
  • the reference signal for measurement for example, CSI-RS or SSB
  • the downlink channel PDCCH or PDSCH
  • the reference signal for measurement eg, CSI-RS or SSB
  • the downlink channel are the same symbols.
  • the beam is set to a beam other than QCL type D (TCI state) and the user terminal can form only one reception beam, the measurement reference signal and the downlink channel cannot be received simultaneously. In this case, a problem is whether the user terminal receives the measurement reference signal or the downlink channel.
  • the present inventors pay attention to a case where a URLLC is set in a future wireless communication system, and use a symbol in which a measurement reference signal (for example, CSI-RS or SSB) is set as a downlink channel (PDCCH). Or, when the reception of PDSCH) is set, that is, when the reference signal for measurement and the downlink channel are set to the same symbol, the operation of the user terminal is specifically examined.
  • a measurement reference signal for example, CSI-RS or SSB
  • SSB downlink channel
  • CSI-RS is set as the measurement reference signal, but this may be read as a synchronization signal block (SSB).
  • SSB synchronization signal block
  • the user terminal transmits the downlink channel (PDCCH or PDSCH) for URLLC.
  • the channel state may be preferentially received, and in other cases, the channel state may be measured by receiving the measurement reference signal (for example, CSI-RS or SSB).
  • the operation of the user terminal when the measurement reference signal (for example, CSI-RS or SSB) and the PDCCH are set to the same symbol and each is not QCL type D will be described.
  • the user terminal may prioritize different signals or channels depending on whether the URLLC is settable and in other cases.
  • FIG. 4 is a diagram showing an example of conditions under which URLLC can be set. Since the user terminal has not yet received the PDCCH, as indicated by hatching in FIG. 4, when a C-RNTI or a new RNTI is set in a higher layer (eg, RRC signaling), a new MCS table (MCS It is determined that Table 3, for example, qam64LowSE) may be applied ((1) or (2) in FIG. 4), that is, it is determined that URLLC can be set.
  • MCS table 3 for example, qam64LowSE
  • the user terminal sets a new MCS table (for example, MCS table 3, for example, qam64LowSE) is applied ((3) in FIG. 4), that is, it is determined that the URLLC has been set to be set.
  • MCS table 3 for example, qam64LowSE
  • an upper layer for example, RRC signaling
  • the user terminal determines that the upper layer (eg, RRC) has set the URLLC, the user terminal preferentially receives the PDCCH and does not receive the measurement reference signal (eg, CSI-RS or SSB). You may. In other cases, the user terminal may receive the reference signal for measurement (for example, CSI-RS or SSB) to measure the channel state, and may not receive the PDCCH.
  • the measurement reference signal eg, CSI-RS or SSB
  • the operation of the user terminal when the measurement reference signal (for example, CSI-RS or SSB) and the PDSCH are set to the same symbol and each is not QCL type D will be described.
  • the user terminal may give priority to different signals or channels depending on whether the URLLC is set or not.
  • FIG. 5 is a diagram showing an example of conditions under which URLLC can be set. Since the user terminal has already detected the PDCCH (DCI), the C-RNTI or the new RNTI is set in the upper layer (for example, RRC signaling) and the DCI that scheduled the PDSCH as highlighted by hatching in FIG. CRC is scrambled with a new RNTI and a new MCS table (MCS table 3, eg, qam64LowSE) is applied when DCI (DCI format 1_0 or DCI format 1_1) is transmitted in a common search space or a UE-specific search space. ((1) or (2) in FIG. 5), that is, it is determined that URLLC has been set.
  • DCI DCI format 1_0 or DCI format 1_1
  • MCS table 3 eg, qam64LowSE
  • the user terminal sets MCS table 3 (eg, qam64LowSE) in a higher layer (eg, RRC signaling) and emphasizes C-RNTI or C-RNTI in a higher layer (eg, RRC signaling) as highlighted by hatching in FIG.
  • MCS table 3 eg, qam64LowSE
  • the CRC of the DCI that scheduled the PDSCH is scrambled with the new RNTI, and the DCI (DCI format 1_0 or DCI format 1_1) is transmitted in the common search space or UE-specific search space
  • the new MCS table (MCS Table 3, for example, qam64LowSE) is applied ((3) in FIG. 5), that is, it is determined that URLLC is set.
  • the user terminal sets MCS table 3 (for example, qam64LowSE) in the upper layer (for example, RRC signaling) and emphasizes C-RNTI in the upper layer (for example, RRC signaling), as highlighted by hatching in FIG.
  • MCS table 3 for example, qam64LowSE
  • the CRC of the DCI that has been set and scheduled the PDSCH is scrambled with the C-RNTI and the DCI (DCI format 1_0) is transmitted in the UE-specific search space
  • MCS table 3 eg, qam64LowSE
  • the user terminal sets MCS table 3 (for example, qam64LowSE) in the upper layer (for example, RRC signaling) and emphasizes C-RNTI in the upper layer (for example, RRC signaling), as highlighted by hatching in FIG.
  • MCS table 3 for example, qam64LowSE
  • the CRC of the DCI that has been set and scheduled the PDSCH is scrambled with the C-RNTI and the DCI (DCI format 1_1) is transmitted in the common search space or the UE-specific search space
  • MCS table 3 eg, qam64LowSE
  • the user terminal may preferentially receive the PDSCH and do not need to receive the measurement reference signal (for example, CSI-RS or SSB). In other cases, the user terminal may receive the reference signal for measurement (for example, CSI-RS or SSB) to measure the channel state, and may not need to receive PDSCH.
  • the measurement reference signal for example, CSI-RS or SSB
  • the user terminal may receive the reference signal for measurement (for example, CSI-RS or SSB) to measure the channel state, and may not need to receive PDSCH.
  • the reference signal for measurement eg, CSI-RS or SSB
  • the downlink channel PDCCH or PDSCH
  • each is not a predetermined pseudo collocation (eg, QCL type D)
  • a user terminal other than the URLLC can preferentially receive the reference signal for measurement (for example, CSI-RS or SSB) and perform beam control and channel quality measurement. Communication quality can be improved.
  • a user terminal to which URLLC can be set can preferentially receive a downlink channel (PDCCH or PDSCH) for URLLC, and thus can realize low delay.
  • the aperiodic CSI-RS (Aperiodic CSI-RS, A-CSI-RS) and the downlink channel (PDCCH or PDSCH) are set to the same symbol, each of which has a predetermined pseudo collocation (for example, QCL type).
  • a predetermined pseudo collocation for example, QCL type
  • the setting of the aperiodic CSI-RS means that a CSI request (trigger) is dynamically made from the base station. Even for the user terminal for which URLLC is set, the priority of the aperiodic CSI-RS (A-CSI-RS) is higher than that of the measurement reference signal (for example, CSI-RS or SSB) described in the first aspect. Expected to be high.
  • the user terminal may prioritize different signals or channels depending on whether the URLLC is settable and in other cases.
  • FIG. 6 is a diagram showing an example of conditions under which URLLC can be set. Since the user terminal has not yet received the PDCCH, the new MCS table (MCS) is set when the C-RNTI or the new RNTI is set in a higher layer (for example, RRC signaling) as highlighted by hatching in FIG. It is determined that Table 3, for example, qam64LowSE) may be applied ((1) or (2) in FIG. 6), that is, it is determined that URLLC can be set.
  • MCS MCS table
  • the user terminal when the MCS table 3 (for example, qam64LowSE) is set in a higher layer (for example, RRC signaling) as highlighted by hatching in FIG. 6, the user terminal creates a new MCS table (for example, MCS table 3, for example, qam64LowSE) is applied ((3) in FIG. 6), that is, it is determined that the URLLC has been set to be set.
  • MCS table 3 for example, qam64LowSE
  • a higher layer for example, RRC signaling
  • the user terminal may preferentially receive the PDCCH and may not receive the aperiodic CSI-RS (A-CSI-RS).
  • A-CSI-RS aperiodic CSI-RS
  • the user terminal When the URLLC is set, the user terminal gives priority to the aperiodic CSI-RS (A-CSI-RS), receives the aperiodic CSI-RS (A-CSI-RS), and measures the channel state. , PDCCH need not be received.
  • A-CSI-RS aperiodic CSI-RS
  • A-CSI-RS receives the aperiodic CSI-RS
  • PDCCH need not be received.
  • the user terminal receives the aperiodic CSI-RS (A-CSI-RS), measures the channel state, and transmits the PDSCH. It is not necessary to receive.
  • A-CSI-RS aperiodic CSI-RS
  • the user terminal may give priority to different signals or channels depending on whether the URLLC is set or not.
  • the C-RNTI or the new RNTI is set in the upper layer (for example, RRC signaling) and the DCI that scheduled the PDSCH as highlighted by hatching in FIG. CRC is scrambled with a new RNTI and a new MCS table (MCS table 3, eg, qam64LowSE) is applied when DCI (DCI format 1_0 or DCI format 1_1) is transmitted in a common search space or a UE-specific search space. ((1) or (2) in FIG. 5), that is, it is determined that URLLC has been set.
  • MCS table 3 eg, qam64LowSE
  • the user terminal sets MCS table 3 (eg, qam64LowSE) in a higher layer (eg, RRC signaling) and emphasizes C-RNTI or C-RNTI in a higher layer (eg, RRC signaling) as highlighted by hatching in FIG.
  • MCS table 3 eg, qam64LowSE
  • the CRC of the DCI that scheduled the PDSCH is scrambled with the new RNTI, and the DCI (DCI format 1_0 or DCI format 1_1) is transmitted in the common search space or UE-specific search space
  • the new MCS table (MCS Table 3, for example, qam64LowSE) is applied ((3) in FIG. 5), that is, it is determined that URLLC is set.
  • the user terminal sets MCS table 3 (for example, qam64LowSE) in the upper layer (for example, RRC signaling) and emphasizes C-RNTI in the upper layer (for example, RRC signaling), as highlighted by hatching in FIG.
  • MCS table 3 for example, qam64LowSE
  • the CRC of the DCI that has been set and scheduled the PDSCH is scrambled with the C-RNTI and the DCI (DCI format 1_0) is transmitted in the UE-specific search space
  • MCS table 3 eg, qam64LowSE
  • the user terminal sets MCS table 3 (for example, qam64LowSE) in the upper layer (for example, RRC signaling) and emphasizes C-RNTI in the upper layer (for example, RRC signaling), as highlighted by oblique lines in FIG.
  • MCS table 3 for example, qam64LowSE
  • the CRC of the DCI that has been set and scheduled the PDSCH is scrambled with the C-RNTI and the DCI (DCI format 1_1) is transmitted in the common search space or the UE-specific search space
  • MCS table 3 eg, qam64LowSE
  • the user terminal may receive the PDSCH preferentially and may not need to receive the aperiodic CSI-RS (A-CSI-RS).
  • A-CSI-RS aperiodic CSI-RS
  • A-CSI-RS aperiodic CSI-RS
  • A-CSI-RS aperiodic CSI-RS
  • the user terminal may receive the aperiodic CSI-RS (A-CSI-RS) to measure the channel state, and may not receive the PDSCH.
  • A-CSI-RS aperiodic CSI-RS
  • the aperiodic CSI-RS (A-CSI-RS) and the downlink channel (PDCCH or PDSCH) are set to the same symbol, each of which is not a predetermined pseudo collocation (eg, QCL type D)
  • a user terminal other than the URLLC (the URLLC is not set) can preferentially receive the aperiodic CSI-RS (A-CSI-RS) and perform beam control and channel quality measurement. Communication quality can be improved.
  • a user terminal to which URLLC can be set can preferentially receive a downlink channel (PDCCH or PDSCH) for URLLC, and thus can realize low delay.
  • the user terminal to which the URLLC is set may preferentially receive the aperiodic CSI-RS (A-CSI-RS) and prioritize the response to the aperiodic CSI request over the reception of the downlink channel. it can.
  • the user terminal may report to the network whether or not multiple beams can be received simultaneously by UE capability.
  • a user terminal that reports that it can receive multiple beams at the same time can transmit a reference signal for measurement (for example, CSI-RS or SSB) and a downlink channel regardless of whether each is a predetermined pseudo-colocation (for example, QCL type D).
  • CSI-RS for example, CSI-RS or SSB
  • SSB SSB
  • a downlink channel regardless of whether each is a predetermined pseudo-colocation
  • PDCCH or PDSCH may be assumed to be received simultaneously.
  • a user terminal that does not report ⁇ UE ⁇ capability may perform the same operation as a user terminal that reports that multiple beams cannot be received simultaneously.
  • the user terminal may report whether or not it is possible to simultaneously receive a plurality of beams with one bit by UE capability. If the user terminal can simultaneously receive a plurality of beams, the user terminal may report how many beams can be supported.
  • FIG. 7 is a diagram illustrating an example of a scenario assumed for a user terminal capable of simultaneously receiving a plurality of beams. As shown in FIG. 7A, it is assumed that a user terminal that can simultaneously receive a plurality of beams supports digital beams. Alternatively, as shown in FIG. 7B, it is assumed that a user terminal capable of simultaneously receiving a plurality of beams supports a multi-panel.
  • ⁇ ⁇ ⁇ Digital beam is a method of performing precoding signal processing on baseband (for digital signals).
  • parallel processing of inverse fast Fourier transform Inverse Fast Fourier Transform (IFFT)
  • digital-analog conversion Digital to Analog Converter (DAC)
  • RF Radio Frequency
  • IFFT Inverse Fast Fourier Transform
  • DAC Digital to Analog Converter
  • RF Radio Frequency
  • the user terminal may report to the network whether or not it supports URLLC by UE capability.
  • the operation of the user terminal described in the first aspect or the second aspect may be applied only to a terminal that has reported the UELC that supports the URLLC.
  • the user terminal may report whether or not the URLLC is supported in one bit by UE capability.
  • the user terminal may report a configurable RNTI combination. If the reported RNTI combination includes a new RNTI, it can be assumed that the user terminal supports URLLC.
  • the user terminal may report a configurable combination of MCS tables.
  • MCS table 3 for example, qam64LowSE
  • URLLC URLLC
  • the reference signal for measurement for example, CSI-RS or SSB
  • the downlink channel for PDCCH or PDSCH
  • the reception priority may be changed depending on the use of the measurement reference signal.
  • the configuration may be such that the priority is changed depending on what purpose the measurement reference signal (for example, CSI-RS or SSB) is for.
  • Applications include, for example, radio resource management (Radio Resource Management (RRM)) (Layer 3 (L3) measurement), radio link monitoring (Radio Link Monitoring (RLM)), beam failure detection (Beam Failure Detection (BFD)), Beam Management (BM) (Layer 1 (L1) Reference Signal Received Power (RSRP) measurement) (L1 Reference Signal Received Quality (RSRQ) measurement (Signal to Interference plus Noise Ratio or SINR or SINR) Measurement and the like.
  • RRM Radio Resource Management
  • L3 Layer 3
  • RLM Radio Link Monitoring
  • BFD Beam Failure Detection
  • BM Layer 1
  • RSSQ Reference Signal Received Quality
  • a reference signal for radio resource management has a lower priority than a CSI-RS even for a synchronization signal block (SSB), and is used for beam management (BM) or radio link monitoring (RLM). May be configured to receive the reference signal with priority. Accordingly, beam management can be appropriately performed in wireless communication, so that deterioration of communication quality in a communication system using beams can be suppressed.
  • the priority of the reference signal or the downlink channel may be determined according to the use of the reference signal.
  • the user terminal receives a reference signal for a high-priority use, and is configured not to receive any other reference signal in the same symbol as the symbol in which the reference signal is set or in the symbols before and after the same symbol. Is also good.
  • the use of the reference signal is, for example, from the highest priority, such as priority 1: beam management (BM) (L1LRSRP measurement), priority 2: beam failure detection (BFD), and priority 3: radio link monitoring (RLM). ), Priority 4: CSI measurement, priority 5: radio resource management (RRM) (L3 measurement).
  • BM beam management
  • BFD beam failure detection
  • RLM radio link monitoring
  • Priority 4 CSI measurement
  • priority 5 radio resource management (RRM) (L3 measurement).
  • the user terminal may prioritize the reference signal if the priority is 1 or more, and may prioritize the downlink channel (PDCCH or PDSCH) otherwise.
  • the user terminal may prioritize the reference signal if the use is of priority 1 or higher, and may preferentially prioritize the PDCCH otherwise.
  • the user terminal may prioritize the reference signal if the use is for priority 3 or higher, and may preferentially prioritize the PDSCH otherwise.
  • BM high priority beam management
  • RRM radio resource management
  • the measurement reference signal for example, CSI-RS or SSB
  • the downlink channel (PDCCH or PDSCH) are set to different component carriers (Component @ Carrier (CC)) on which carrier aggregation is performed, and each is set to a predetermined pseudo collocation (for example, , QCL type D), the priority may be determined according to the type or use of the signal or the type of the cell, and either the reference signal or the downlink channel may be received.
  • component carriers Component @ Carrier (CC)
  • the priority may be determined in consideration of the use of the reference signal, the type of cell, the cell index, the frequency band of the cell, or the like.
  • the primary cell Primary Secondary Cell (PSCell)
  • SCell Secondary Cell
  • PCell Primary Cell
  • the minimum CC index (the lowest CC index) or the maximum CC index (the largest CC index) may be prioritized.
  • the first frequency band (FR1) may be given priority over the second frequency band (FR2) (FR1> FR2), or the second frequency band (FR2) may be given the first frequency band (FR2). (FR2> FR1).
  • the first frequency band (FR1) may be, for example, a frequency band of 6 GHz or less (sub-6 GHz (sub-6 GHz)).
  • the second frequency band (FR2) may be a frequency band higher than 24 GHz (above-24 GHz).
  • the first frequency band (FR1) may be defined as a frequency range in which at least one of 15, 30, and 60 kHz is used as a sub-carrier spacing (Sub-Carrier Spacing (SCS)).
  • SCS sub-carrier Spacing
  • the second frequency band (FR2) may be defined as a frequency range in which at least one of 60 and 120 kHz is used as a subcarrier interval (SCS).
  • the frequency bands and definitions of the first frequency band (FR1) and the second frequency band (FR2) are not limited to these.
  • the first frequency band (FR1) may be a higher frequency band than the second frequency band (FR2).
  • the second frequency band (FR2) may be used only for a time division duplex (Time Division Duplex (TDD)) band. It is preferable that the second frequency band (FR2) is operated synchronously between a plurality of base stations. When a plurality of carriers are included in the second frequency band (FR2), it is preferable that these carriers be operated synchronously.
  • Wireless communication system Wireless communication system
  • the configuration of the wireless communication system according to the present embodiment will be described.
  • the wireless communication method according to the above embodiment is applied.
  • FIG. 8 is a diagram showing an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • a carrier aggregation Carrier Aggregation (CA)
  • CA Carrier Aggregation
  • CC Component Carriers
  • DC Dual Connectivity
  • the wireless communication system 1 may be called SUPER @ 3G, LTE-A (LTE-Advanced), IMT-Advanced, 4G, 5G, FRA (Future Radio Access), NR (New Radio), or the like.
  • the wireless communication system 1 may support dual connectivity (Multi-RAT DC (MR-DC)) between a plurality of RATs (Radio Access Technology).
  • the MR-DC has dual connectivity (E-UTRA-NR @ DC (EN) between LTE and NR in which an LTE (E-UTRA) base station (eNB) becomes a master node and an NR base station (gNB) becomes a secondary node.
  • E-UTRA LTE
  • gNB NR base station
  • NE-DC dual connectivity
  • the wireless communication system 1 includes a base station 11 forming a macro cell C1, and base stations 12a to 12c arranged in the macro cell C1 and forming small cells C2 smaller than the macro cell C1.
  • User terminals 20 are arranged in the macro cell C1 and each small cell C2.
  • a configuration in which different numerology is applied between cells may be adopted. Numerology refers to a signal design in a certain RAT and a set of communication parameters that characterize the RAT design.
  • the user terminal 20 can be connected to both the base station 11 and the base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 using different frequencies at the same time by carrier aggregation (CA) or dual connectivity (DC).
  • the user terminal 20 can apply carrier aggregation (CA) or dual connectivity (DC) using a plurality of cells (CCs) (for example, two or more CCs).
  • CCs cells
  • the user terminal can use the licensed band CC and the unlicensed band CC as a plurality of cells.
  • a configuration may be employed in which a TDD carrier to which the shortened TTI is applied is included in any of the plurality of cells.
  • Communication between the user terminal 20 and the base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (existing carrier, called Legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, 30 to 70 GHz, or the like
  • the same carrier as that between may be used.
  • the configuration of the frequency band used by each base station is not limited to this.
  • a wired connection for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like
  • a wireless connection is used between the base station 11 and the base station 12 (or between the two base stations 12). It can be.
  • the base station 11 and each base station 12 are connected to the upper station apparatus 30, respectively, and are connected to the core network 40 via the upper station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • Each base station 12 may be connected to the upper station apparatus 30 via the base station 11.
  • the base station 11 is a base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the base station 12 is a base station having local coverage, and is called a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), a RRH (Remote Radio Head), a transmission / reception point, or the like. May be.
  • the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.
  • Each user terminal 20 is a terminal corresponding to various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals but also fixed communication terminals.
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier-frequency division multiple access
  • OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier to perform communication.
  • SC-FDMA is a single-carrier transmission scheme that divides a system bandwidth into bands each consisting of one or a continuous resource block for each terminal, and reduces interference between terminals by using different bands for a plurality of terminals. is there.
  • the uplink and downlink radio access schemes are not limited to these combinations, and OFDMA may be used in the uplink.
  • a downlink data channel also referred to as a Physical Downlink Shared Channel (PDSCH), a downlink shared channel, etc.
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • L1 Physical Broadcast Channel
  • PBCH Physical Broadcast Channel
  • L2 control channel or the like is used.
  • the PDSCH transmits user data, higher layer control information, SIB (System Information Block), and the like.
  • SIB System Information Block
  • MIB Master Information Block
  • the L1 / L2 control channels include downlink control channels (Physical Downlink Control Channel (PDCCH), Enhanced Physical Downlink Control Channel (EPDCCH)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like. .
  • Downlink control information Downlink Control Information (DCI)) including PDSCH and PUSCH scheduling information is transmitted by the PDCCH.
  • DCI Downlink Control Information
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • HARQ transmission acknowledgment information (ACK / NACK) for PUSCH is transmitted by PHICH.
  • the EPDCCH is frequency-division multiplexed with the PDSCH (Downlink Shared Data Channel), and is used for transmission of DCI and the like like the PDCCH.
  • an uplink data channel Physical Uplink Shared Channel (PUSCH), also referred to as an uplink shared channel) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)).
  • a random access channel Physical Random Access Channel (PRACH)) or the like.
  • PUSCH is used to transmit user data and higher layer control information.
  • Uplink control information Uplink Control Information (UCI)) including at least one of acknowledgment information (ACK / NACK) and radio quality information (CQI) is transmitted by PUSCH or PUCCH.
  • the PRACH transmits a random access preamble for establishing a connection with a cell.
  • FIG. 9 is a diagram showing an example of the overall configuration of the base station according to the present embodiment.
  • the base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.
  • the base station 10 is a transmitting device for downlink data, and may be a receiving device for uplink data.
  • ⁇ ⁇ Downlink data transmitted from the base station 10 to the user terminal 20 is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • the baseband signal processing unit 104 regarding downlink data, processing of a PDCP (Packet Data Convergence Protocol) layer, division / combination of user data, transmission processing of an RLC layer such as RLC (Radio Link Control) retransmission control, MAC (Medium Access) Control) Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, and precoding processing are performed, and transmission / reception is performed. It is transferred to the unit 103.
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
  • the transmission / reception section 103 converts the baseband signal pre-coded and output from the baseband signal processing section 104 for each antenna into a radio frequency band, and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting / receiving antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
  • the transmission / reception unit 103 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmitting / receiving section 103 receives the upstream signal amplified by the amplifier section 102.
  • Transmitting / receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (Fast Fourier Transform (FFT)) processing, inverse discrete Fourier transform (Inverse Discrete Fourier Transform (IDFT)) processing on user data included in the input uplink signal, Error correction decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing such as setting and release of a communication channel, state management of the base station 10, and management of radio resources.
  • the transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface.
  • the transmission path interface 106 may transmit and receive signals (backhaul signaling) to and from another base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). .
  • CPRI Common Public Radio Interface
  • X2 interface X2 interface
  • the transmission / reception unit 103 may further include an analog beamforming unit that performs analog beamforming.
  • the analog beam forming unit includes an analog beam forming circuit (for example, a phase shifter, a phase shift circuit) or an analog beam forming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmission / reception antenna 101 can be configured by, for example, an array antenna.
  • the transmission / reception unit 103 is configured so that a single BF and a multi BF can be applied.
  • Transceiving section 103 may transmit a signal using a transmission beam or receive a signal using a reception beam.
  • the transmission / reception unit 103 may transmit and receive a signal using a predetermined beam determined by the control unit 301.
  • the transmitting / receiving section 103 includes a downlink signal (for example, a downlink control signal (downlink control channel), a downlink data signal (downlink data channel, downlink shared channel), a downlink reference signal (DM-RS, CSI-RS, etc.), a discovery signal, a synchronization signal, Signals, broadcast signals, etc.).
  • the transmitting / receiving section 103 receives an uplink signal (eg, an uplink control signal (uplink control channel), an uplink data signal (uplink data channel, uplink shared channel), an uplink reference signal, and the like).
  • Transceiving section 103 may transmit an upper layer parameter for setting the MCS table and the RNTI type.
  • the transmission unit and the reception unit of the present invention are configured by both or one of the transmission / reception unit 103 and the transmission line interface 106.
  • FIG. 10 is a diagram showing an example of a functional configuration of the base station according to the present embodiment.
  • FIG. 2 mainly shows functional blocks of characteristic portions in the present embodiment, and it is assumed that the base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes at least a control unit 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305.
  • the control unit 301 controls the entire base station 10.
  • the control unit 301 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
  • the control unit 301 controls, for example, generation of a signal by the transmission signal generation unit 302 and allocation of a signal by the mapping unit 303.
  • the control unit 301 controls signal reception processing by the reception signal processing unit 304 and signal measurement by the measurement unit 305.
  • Control section 301 controls scheduling of downlink signals and uplink signals (for example, resource allocation). Specifically, the control unit 301 transmits and generates a DCI (DL assignment, DL grant) including the scheduling information of the downlink data channel and a DCI (UL grant) including the scheduling information of the uplink data channel. It controls the signal generation unit 302, the mapping unit 303, and the transmission / reception unit 103.
  • DCI DL assignment, DL grant
  • UL grant including the scheduling information of the uplink data channel.
  • the transmission signal generation unit 302 generates a downlink signal (a downlink control channel, a downlink data channel, a downlink reference signal such as a DM-RS, etc.) based on an instruction from the control unit 301, and outputs the downlink signal to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the result to transmission / reception section 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • Reception signal processing section 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from transmission / reception section 103.
  • the received signal is an uplink signal (uplink control channel, uplink data channel, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301.
  • the reception processing unit 304 outputs at least one of a preamble, control information, and UL data to the control unit 301.
  • reception signal processing section 304 outputs the reception signal and the signal after the reception processing to measurement section 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be constituted by a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present invention.
  • the measurement unit 305 may measure, for example, the received power (for example, Reference Signal Received Power (RSRP)) of the received signal, the reception quality (for example, Reference Signal Received Quality (RSRQ)), the channel state, and the like.
  • the measurement result may be output to the control unit 301.
  • FIG. 11 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmitting / receiving antenna 201, the amplifier unit 202, and the transmitting / receiving unit 203 may be configured to include at least one each.
  • the user terminal 20 is a receiving device for downlink data and may be a transmitting device for uplink data.
  • the radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmitting / receiving section 203 converts the frequency of the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 204.
  • the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
  • the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal.
  • the downlink data is transferred to the application unit 205.
  • the application unit 205 performs processing related to a layer higher than the physical layer and the MAC layer. Of the downlink data, system information and higher layer control information are also transferred to the application unit 205.
  • Uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs retransmission control transmission processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (Discrete Fourier Transform (DFT)) processing, IFFT processing, and the like.
  • the data is transferred to the transmission / reception unit 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • the transmission / reception unit 203 may further include an analog beamforming unit that performs analog beamforming.
  • the analog beam forming unit includes an analog beam forming circuit (for example, a phase shifter, a phase shift circuit) or an analog beam forming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do.
  • the transmitting / receiving antenna 201 can be configured by, for example, an array antenna.
  • the transmission / reception unit 203 is configured so that single BF and multi BF can be applied.
  • the transmission / reception unit 203 may transmit a signal using a transmission beam or may receive a signal using a reception beam.
  • the transmission / reception unit 203 may transmit and receive a signal using a predetermined beam determined by the control unit 401.
  • the transmitting / receiving section 203 includes a downlink signal (for example, a downlink control signal (downlink control channel), a downlink data signal (downlink data channel, downlink shared channel), a downlink reference signal (DM-RS, CSI-RS, etc.), a discovery signal, a synchronization signal, Signals, annunciation signals, etc.).
  • the transmitting / receiving section 203 transmits an uplink signal (eg, an uplink control signal (uplink control channel), an uplink data signal (uplink data channel, uplink shared channel), an uplink reference signal, and the like).
  • Transceiving unit 203 may receive an upper layer parameter for setting the MCS table and the RNTI type.
  • FIG. 12 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 2 mainly shows functional blocks of characteristic portions in the present embodiment, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
  • the control unit 401 controls, for example, generation of a signal by the transmission signal generation unit 402 and assignment of a signal by the mapping unit 403.
  • the control unit 401 controls signal reception processing by the reception signal processing unit 404 and signal measurement by the measurement unit 405.
  • control section 401 sets a predetermined MCS table (MCS table 3, for example, (qam64LowSE), the reception of the reference signal and the downlink channel may be controlled depending on whether or not downlink transmission using the same can be set.
  • MCS table 3 for example, (qam64LowSE
  • control section 401 When the measurement reference signal (for example, CSI-RS or SSB) and the PDCCH are set to the same time resource (symbol), control section 401 performs downlink using a predetermined MCS table (MCS table 3, for example, qam64LowSE). When it is determined that link transmission can be set, control may be performed to select and receive the PDCCH.
  • MCS table 3 for example, qam64LowSE
  • control section 401 transmits downlink using a predetermined MCS table (MCS table 3, for example, qam64LowSE).
  • MCS table 3 for example, qam64LowSE.
  • control section 401 transmits downlink using a predetermined MCS table (MCS table 3, for example, qam64LowSE).
  • MCS table 3 for example, qam64LowSE
  • control may be performed to select and receive an aperiodic CSI-RS (A-CSI-RS).
  • DCI that has triggered the aperiodic CSI-RS (A-CSI-RS) is scrambled by a predetermined RNTI (new RNTI)
  • control unit 401 determines a predetermined MCS table (MCS table 3, for example, , Qam64LowSE) may be determined to be set.
  • Transmission signal generation section 402 generates an uplink signal (uplink control channel, uplink data channel, uplink reference signal, etc.) based on an instruction from control section 401, and outputs it to mapping section 403.
  • the transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • Transmission signal generation section 402 generates an uplink data channel based on an instruction from control section 401. For example, when the UL grant is included in the downlink control channel notified from base station 10, transmission signal generation section 402 is instructed by control section 401 to generate an uplink data channel.
  • Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203.
  • the mapping unit 403 can be composed of a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 203.
  • the received signal is a downlink signal (a downlink control channel, a downlink data channel, a downlink reference signal, etc.) transmitted from the base station 10.
  • the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 can constitute a reception unit according to the present invention.
  • Reception signal processing section 404 performs blind decoding on the downlink control channel for scheduling transmission and reception of the downlink data channel based on the instruction of control section 401, and performs reception processing of the downlink data channel based on the DCI.
  • Received signal processing section 404 estimates a channel gain based on DM-RS or CRS, and demodulates a downlink data channel based on the estimated channel gain.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
  • the reception signal processing unit 404 may output the data decoding result to the control unit 401.
  • the reception signal processing unit 404 outputs the reception signal and the signal after the reception processing to the measurement unit 405.
  • the measuring unit 405 measures the received signal.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present invention.
  • Measurement section 405 may measure, for example, the received power (eg, RSRP), DL reception quality (eg, RSRQ), channel state, and the like of the received signal.
  • the measurement result may be output to the control unit 401.
  • each functional block (configuration units) are realized by an arbitrary combination of at least one of hardware and software.
  • the method for implementing each functional block is not particularly limited. That is, each functional block may be realized 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 block may be realized by combining one device or the plurality of devices with software.
  • the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the realization method is not particularly limited.
  • a base station, a user terminal, and the like may function as a computer that performs processing of the wireless communication method according to the present disclosure.
  • FIG. 13 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment.
  • the above-described base station 10 and user terminal 20 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 devices shown in the drawing, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function of the base station 10 and the user terminal 20 is performed by, for example, reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (Central Processing Unit (CPU)) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the baseband signal processing unit 104 (204), the call processing unit 105, and the like described above may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operation described in the above embodiment is used.
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly realized.
  • the memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (eg, Compact Disc (ROM) (CD-ROM)), a digital versatile disc, At least one of a Blu-ray® disk), a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured.
  • the storage 1003 may be called an auxiliary storage device.
  • the communication device 1004 is hardware (transmitting / receiving device) for performing communication 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, and the like.
  • the communication apparatus 1004 includes, for example, a high-frequency switch, a duplexer, a filter, and a frequency synthesizer to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be included.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like may be realized by the communication device 1004.
  • the transmission / reception unit 103 (203) may be mounted physically or logically separated between the transmission unit 103a (203a) and the reception unit 103b (203b).
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input.
  • the output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, and the like).
  • 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 a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the base station 10 and the user terminal 20 are hardware such as a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). And some or all of the functional blocks may be implemented using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard.
  • RS Reference Signal
  • a component carrier Component Carrier (CC)
  • CC Component Carrier
  • a radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • the one or more respective periods (frames) constituting the radio frame may be referred to as a subframe.
  • a subframe may be configured by one or more slots in the time domain.
  • a subframe may be of a fixed length of time (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.
  • subcarrier interval (Subcarrier @ Spacing (SCS)
  • SCS Spacing
  • symbol length (Symbol length)
  • cyclic prefix length (Transmission @ Time @ Interval (TTI))
  • TTI Transmission @ Time @ Interval
  • number of symbols per TTI radio frame configuration
  • transceiver At least one of a specific filtering process performed in a domain and a specific windowing process performed by a transceiver in a time domain may be indicated.
  • the slot may be composed of one or more symbols in the time domain, for example, Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, and the like.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may be a time unit based on numerology.
  • the slot may include a plurality of mini slots. Each minislot may be constituted by one or more symbols in the time domain. Minislots may be referred to as subslots. A minislot may be made up of a smaller number of symbols than slots.
  • a PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals.
  • the radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding thereto.
  • one subframe may be called a transmission time interval (Transmission @ Time @ Interval (TTI)), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot is called a TTI. It may be. 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 (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit of scheduling in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal 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 and link adaptation.
  • a time interval for example, the number of symbols
  • a transport block, a code block, a codeword, and the like 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 (mini-slot number) 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 LTE@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
  • a 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, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms or more.
  • the TTI having the TTI length may be read.
  • Resource Block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain.
  • a resource block may include one or more symbols in a time domain, and may be one slot, one minislot, one subframe or one TTI in length.
  • One TTI and one subframe may each be configured by one or a plurality of resource blocks.
  • One or more resource blocks are a physical resource block (Physical @ RB (PRB)), a subcarrier group (Sub-Carrier @ Group (SCG)), a resource element group (Resource @ Element @ Group (REG)), and a PRB pair. , RB pair, etc.
  • PRB Physical @ RB
  • SCG subcarrier group
  • REG resource element group
  • PRB pair a PRB pair.
  • the resource block may be configured by 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.
  • the structures of the above-described radio frames, subframes, slots, minislots, symbols, and the like are merely examples.
  • the number of subcarriers included in the resource block (RB), and the configurations such as the number of symbols in the TTI, the symbol length, and the cyclic prefix (Cyclic Prefix (CP)) length can be variously changed.
  • Information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. You may. For example, a radio resource may be indicated by a predetermined index.
  • Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure.
  • the various channels e.g., Physical Uplink Control Channel (PUCCH), Physical Downlink Control Channel (PDCCH), etc.
  • the information elements can be identified by any suitable name, so the various channels assigned to these various channels and information elements
  • the names are not limiting in any way.
  • the 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 can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of
  • Information, signals, and the like 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 / output via a plurality of network nodes.
  • Input / output information, signals, and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like 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.
  • information is notified by physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), and upper layer signaling (for example, Radio Resource Control (RRC)).
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • Signaling broadcast information (Master Information Block (MIB), system information block (System Information Block (SIB)), etc.), MAC (Medium Access Control) signaling, and other signals or a combination thereof are implemented.
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • Physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRCRRConnection 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 (MAC @ CE)).
  • the notification of the predetermined information is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or notifying of another information). ).
  • the determination may be made by a value represented by 1 bit (0 or 1), or may be made by a boolean value represented by true or false. , May be performed by comparing numerical values (for example, comparison with a predetermined value).
  • Software, instructions, information, etc. may be transmitted and received via transmission media.
  • software may use website technology using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL)) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL)
  • wireless technology infrared, microwave, etc.
  • a server, or other remote source, these wired and / or wireless technologies are included within the definition of the transmission medium.
  • system and “network” may be used interchangeably.
  • precoding In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “pseudo collocation (Quasi-Co-Location (QCL))”, “TCI state (Transmission Configuration Indication state)”, “space” Relation (spatial relation), “spatial domain filter (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 on a regular basis.
  • base station Base @ Station (BS)
  • wireless base station fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • Access point e.g., "transmission point”
  • Reception point e.g., "transmission / reception point”
  • cell cell
  • BWP Bandwidth @ Part
  • a base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.
  • a base station may accommodate one or more (eg, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into a plurality of smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio Station)). Head (RRH))).
  • base station subsystem eg, a small indoor base station (Remote Radio Station)). Head (RRH)
  • RRH Head
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • 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 terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile, the mobile itself, or the like.
  • the moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (maned or unmanned). ).
  • At least one of the base station and the mobile station 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 IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced by a user terminal.
  • communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the configuration may be such that the user terminal 20 has 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”).
  • an uplink channel, a downlink channel, and the like may be replaced with a side channel.
  • a user terminal in the present disclosure may be replaced by a base station.
  • a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.
  • the operation performed by the base station may be performed by an upper node (upper node) in some cases.
  • various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility @ Management @ Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.
  • Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution.
  • the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be interchanged in order as long as there is no contradiction.
  • elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • LTE-B Long Term Evolution-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication
  • system 5G (5th generation mobile communication system)
  • FRA Fluture Radio Access
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Fluture generation radio access
  • GSM Registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • UWB Ultra-WideBand
  • Bluetooth registered trademark
  • a system using other appropriate wireless communication methods and a next-generation system extended based on these methods.
  • a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.
  • any reference to elements using designations such as "first,” “second,” etc., as used in the present disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining means judging, calculating, computing, processing, deriving, investigating, searching (upping, search, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".
  • Determining includes receiving (eg, receiving information), transmitting (eg, transmitting information), input, output, accessing. (E.g., accessing data in a memory) or the like may be considered as “determining (determining)."
  • Determining may be considered to be “determining” resolving, selecting, choosing, establishing, comparing, and the like. . That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.
  • the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).
  • connection refers to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • the radio frequency domain, microwave It can be considered to be “connected” or “coupled” together using electromagnetic energy having a wavelength in the region, the light (both visible and invisible) region, and the like.

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