WO2019138523A1 - Terminal utilisateur et procédé de communication sans fil - Google Patents

Terminal utilisateur et procédé de communication sans fil Download PDF

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Publication number
WO2019138523A1
WO2019138523A1 PCT/JP2018/000549 JP2018000549W WO2019138523A1 WO 2019138523 A1 WO2019138523 A1 WO 2019138523A1 JP 2018000549 W JP2018000549 W JP 2018000549W WO 2019138523 A1 WO2019138523 A1 WO 2019138523A1
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Prior art keywords
signal
subcarrier
control
user terminal
predetermined signal
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PCT/JP2018/000549
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
英之 諸我
聡 永田
佑一 柿島
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2018/000549 priority Critical patent/WO2019138523A1/fr
Publication of WO2019138523A1 publication Critical patent/WO2019138523A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-Patent Document 1 LTE-A (LTE-Advanced), FRA (Future Radio Access), 4G, 5G, 5G + (plus), NR ( Also referred to as New RAT), LTE Rel. 14, 15 and so on.
  • downlink (DL: Downlink) and / or uplink (UL: Uplink) communication is performed with a subframe of 1 ms as a scheduling unit.
  • DL Downlink
  • UL Uplink
  • the subframe is composed of 14 symbols of 15 kHz subcarrier spacing.
  • the subframes are also referred to as transmission time intervals (TTIs) or the like.
  • the user terminal (UE: User Equipment) is a DL data channel based on downlink control information (DCI: Downlink Control Information) (also referred to as DL assignment etc.) from a radio base station (for example, eNB: eNodeB). It controls reception of (for example, PDSCH: Physical Downlink Shared Channel, DL Shared Channel, etc.). Also, the user terminal controls transmission of a UL data channel (for example, PUSCH: also referred to as Physical Uplink Shared Channel, UL shared channel, etc.) based on DCI (also referred to as UL grant, etc.) from the radio base station.
  • DCI Downlink Control Information
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • CA carrier aggregation
  • the present invention has been made in view of such a point, and even when signal degradation is expected locally in frequency resources, the influence is suppressed and communication is performed using radio resources effectively. It aims at providing a possible user terminal and a wireless communication method.
  • One aspect of the user terminal includes a transmitting / receiving unit performing at least one of transmission and reception of a predetermined signal in a predetermined frequency band, and a DC subcarrier (Direct Current subcarrier) corresponding to the center of the frequency band to the predetermined signal. And a controller configured to control at least one of transmission and reception of the predetermined signal when a radio resource is allocated.
  • a transmitting / receiving unit performing at least one of transmission and reception of a predetermined signal in a predetermined frequency band, and a DC subcarrier (Direct Current subcarrier) corresponding to the center of the frequency band to the predetermined signal.
  • a controller configured to control at least one of transmission and reception of the predetermined signal when a radio resource is allocated.
  • FIG. 1 is a diagram for explaining the arrangement of subcarriers in the communication frequency band of LTE DL and UL.
  • FIG. 2 is a diagram for explaining the arrangement of subcarriers in the communication frequency band of NR.
  • FIG. 3 is a diagram for describing an exemplary arrangement of reference signals (DM-RS, PT-RS) in NR radio resources.
  • FIG. 4 is a diagram showing an example of a table used to determine a subcarrier offset of a reference signal.
  • FIG. 5 is a diagram for explaining an example of controlling the offset of the reference signal in accordance with whether or not the radio resource of the DC subcarrier is allocated to the reference signal (PT-RS).
  • FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • FIG. 1 is a diagram for explaining the arrangement of subcarriers in the communication frequency band of LTE DL and UL.
  • FIG. 2 is a diagram for explaining the arrangement of subcarriers in the communication frequency
  • FIG. 7 is a diagram showing an example of the entire configuration of the radio base station according to the present embodiment.
  • FIG. 8 is a diagram showing an example of a functional configuration of the radio base station according to the present embodiment.
  • FIG. 9 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment.
  • FIG. 10 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • FIG. 11 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • carriers for example, NR, 5G or 5G +
  • carriers component carriers (CC: Component Carrier) having a wider bandwidth (for example, 100 to 800 MHz) than existing LTE systems (for example, LTE Rel. 8-13) It is considered to assign a carrier (also referred to as a cell or a system band).
  • a user terminal also referred to as Wideband (WB) UE, single carrier WB UE, etc.
  • WB Wideband
  • UE single carrier WB UE
  • each frequency band (for example, 50 MHz or 200 MHz) in the carrier is called a sub-band or bandwidth part (BWP) or the like.
  • a user terminal may be a control resource area (for example, control resource set (CORESET), which is a candidate area to which a DL control channel (for example, PDCCH: Physical Downlink Control Channel) is allocated. It is considered to receive (detect) DCI by monitoring (blind decoding) control resource set)).
  • CORESET control resource set
  • PDCCH Physical Downlink Control Channel
  • the signal (waveform) is greatly distorted by the influence of a local oscillator or the like in a subcarrier (so-called Direct Current subcarrier (DC subcarrier)) corresponding to the center of the communication frequency band. It has been known. For this reason, in the downlink of LTE, a measure is taken that does not use a DC subcarrier (upper part of FIG. 1). Further, in the uplink of LTE, a measure is taken to shift the subcarriers in the frequency direction by half the subcarrier bandwidth (subcarrier spacing) (lower stage in FIG. 1).
  • DC subcarrier Direct Current subcarrier
  • control channels eg, PDCCH, PUCCH, CORESET
  • reference signals RS
  • signal quality degradation in DC subcarriers is considered to greatly affect the quality of control channels and / or reference signals to which resources of DC subcarriers are allocated.
  • phase noise correction reference signal which is one of the reference signals
  • PT-RS phase noise correction reference signal
  • FIG. 3 shows an example of arranging PT-RSs continuously.
  • radio resources of DC subcarriers may be allocated to uplink signals and / or downlink signals, and radio resources of DC subcarriers may be allocated to specific signals. It came to a method of judging (detecting) assignment and performing appropriate control (processing, scheduling, mapping, demapping, etc.) for modulating / demodulating the signal based on the judgment result.
  • the present embodiment can be applied to the uplink signal transmitted from the user terminal.
  • the uplink signal access scheme supports either CP-OFDM (Cyclic Prefix Orthogonal Frequency Division Multiplexing) or SC-FDMA (Single Carrier Frequency Division Multiple Access).
  • CP-OFDM Cyclic Prefix Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • NOMA Non-Orthogonal Multiple Access
  • the user terminal determines whether a radio resource of a DC subcarrier is allocated to a predetermined signal (specific signal) (whether or not the predetermined signal and the DC subcarrier collide).
  • the predetermined signal may include a reference signal.
  • the reference signal may include CSI-RS (Channel State Information-Reference Signal), DM-RS (DeModulation Reference Signal), PT-RS and the like.
  • SRS Sounding Refeerence Signal
  • the predetermined signal may include a signal used in initial access between the radio base station and the user terminal. For example, synchronization signals (SS, PSS, SSS), PBCH (Physical Broadcast Channel), RMSI (Remaining Minimum System Information), Msg. 1-4 (message 1-4) may be included.
  • the predetermined signal may include a signal transmitted on the control channel. For example, in the case of targeting a downlink signal, DCI may be included.
  • control signals uplink control signals: UCI transmitted on PUCCH or PUSCH may be included.
  • control means control for reception when the target is a downlink signal.
  • This control includes at least one of demapping, decoding, de-rate matching, depuncturing, and demodulation. If the target is an uplink signal, this means control for transmission.
  • the control in this case includes at least one of mapping, coding processing, rate matching, puncturing, and modulation processing.
  • Control method 1 In the control method 1, when it is determined that the radio resource of the DC subcarrier is not allocated to the predetermined signal, the control for receiving the downlink signal is performed similarly to the other subcarriers.
  • the user terminal regards the radio resource of the DC subcarrier as blank (vacant resource) and uses it for reception (signaling Used for demodulation) If the predetermined signal is also allocated to other subcarriers across DC subcarriers, the user terminal performs de-puncturing or de-rate matching on radio resources of DC subcarriers. Thereby, the user terminal can perform reception processing (for example, demodulation processing) of the predetermined signal using the radio resources of other subcarriers.
  • Control method 1 can also be applied to the uplink. For example, when it is determined that the radio resource of the DC subcarrier is not allocated to the predetermined signal, control (for example, mapping processing) for transmission may be performed similarly to the other subcarriers.
  • control for example, mapping processing
  • the user terminal regards the radio resource of the DC subcarrier as blank (vacant resource) and uses it (uses for mapping of the predetermined signal) do not do.
  • the predetermined signal is allocated to other subcarriers across DC subcarriers
  • the user terminal performs puncturing or rate matching in mapping the predetermined signal. Thereby, reception processing (for example, demodulation processing, decoding processing) of a predetermined signal can be performed using the radio resources of other subcarriers.
  • Control method 2 In the control method 2, when it is determined that the radio resource of the DC subcarrier is not allocated to the predetermined signal, control for receiving the downlink signal is performed similarly to the other subcarriers.
  • the user terminal regards the signal allocated to the radio resource of the DC subcarrier as a data signal, and other subcarriers (for example, Reception control (such as demodulation processing) of a predetermined signal is performed using resources of adjacent subcarriers or a plurality of consecutive subcarriers including adjacent subcarriers.
  • Reception control such as demodulation processing
  • the user terminal can receive (demodulate) the predetermined signal in the same manner as the data signal.
  • the demodulation processing when it is determined that the radio resource of the DC subcarrier is allocated to the predetermined signal allows the deterioration of the signal quality due to distortion of the DC subcarrier to some extent.
  • Control method 2 can also be applied to the uplink. For example, when it is determined that the radio resource of the DC subcarrier is not allocated to the predetermined signal, control (for example, modulation processing) for transmission may be performed similarly to the other subcarriers.
  • control for example, modulation processing
  • the user terminal regards the signal allocated to the radio resource of the DC subcarrier as a data signal, and other subcarriers (for example, Transmission control (such as modulation processing) of a predetermined signal may be performed using resources of adjacent subcarriers or a plurality of consecutive subcarriers including adjacent subcarriers).
  • other subcarriers for example, Transmission control (such as modulation processing) of a predetermined signal may be performed using resources of adjacent subcarriers or a plurality of consecutive subcarriers including adjacent subcarriers.
  • the user terminal can transmit (modulate) the predetermined signal in the same manner as the data signal.
  • the modulation process when it is determined that the radio resource of the DC subcarrier is allocated to the predetermined signal can be said to allow the deterioration of the signal quality due to distortion of the DC subcarrier to some extent.
  • Control method 3 In control method 3, control for reception is performed on the assumption that the setting of the predetermined signal is different depending on whether the radio resource of the DC subcarrier is allocated to the predetermined signal or not.
  • the “configuration” may be defined in advance by a mathematical expression or a table in the user terminal. In addition, such an equation or table may be changed to be semi-statically by higher level signaling, or may be changed dynamically by downlink control signals such as DCI.
  • “setting” includes at least one of the following elements.
  • the position where the predetermined signal is arranged may include a resource position and / or an antenna port.
  • an offset shift resources in the frequency direction
  • the density may be the number (repetition number) of predetermined signals arranged in a predetermined resource unit (for example, in an RB).
  • the coding rate may be a so-called Modulation and Coding Scheme (MCS).
  • the user terminal demodulates the predetermined signal based on the configuration according to the result of the determination method described above.
  • a specific example of control method 3 will be described later.
  • Control method 3 can also be applied to the uplink. Specifically, control for transmission is performed on the assumption that the setting of the predetermined signal is different depending on whether the radio resource of the DC subcarrier is allocated to the constant signal or not.
  • the “configuration” at the time of uplink application may be defined in advance by a formula, a table or the like in the user terminal, as at the time of downlink application. In addition, such an equation or table may be changed to be semi-statically by higher level signaling, or may be changed dynamically by downlink control signals such as DCI.
  • “setting” includes at least one of the following elements.
  • the position where the predetermined signal is arranged may include a resource position and / or an antenna port.
  • an offset shift resources in the frequency direction
  • the density may be the number (repetition number) of predetermined signals arranged in a predetermined resource unit (for example, in an RB).
  • the coding rate may be a so-called Modulation and Coding Scheme (MCS).
  • the user terminal modulates a predetermined signal based on the configuration according to the result of the determination method described above.
  • Control method 4 In the control method 4, when the result of the determination method indicates that the radio resource of the DC subcarrier is allocated to the predetermined signal, the change of the above “configuration (configuration)” is performed on the network side (radio base station (gNB)) To request. Control method 4 may be applied, for example, when scheduling (when independent scheduling is performed for each CC), the gNB does not know the DC subcarrier of the user terminal.
  • control method 4 since the user terminal side requests the setting change, the setting can be dynamically changed.
  • control method 4 A specific example of control method 4 will be described below in conjunction with control method 3.
  • Control method 3 ⁇ Control based on different settings>
  • control method 4 ⁇ Control based on different settings>
  • PT-RS as a predetermined signal
  • the predetermined signal is not limited to PT-RS, and may be another reference signal or control channel.
  • K ref RE indicates the offset value of the PT-RS subcarrier in RE units.
  • i takes integer values of 0, 1, 2, ...
  • K PTRS indicates an offset in RB units of PT-RS subcarriers.
  • the frequency density of PT-RS is shown.
  • K ref RB and N sc RB indicate the number of subcarriers in the frequency domain of PRB (physical reource block). Specifically, it means twelve.
  • the user terminal determines K ref RB based on (Equation 2) below.
  • n RNTI indicates C-RNTI associated with DCI scheduling.
  • N RB indicates a scheduled bandwidth.
  • the user terminal determines K ref RE based on the table of FIG. That is, the user terminal specifies the offset of the PT-RS subcarrier in RE units based on the DM-RS configuration type (DM-RS mapping type) / port and the DM-RS antenna port (determination ).
  • the DM-RS setting types are classified into Type 1 and Type 2.
  • DM-RS setting types may be set in wireless communication system units (or cell units). Therefore, numerical values corresponding to a plurality of DM-RS setting types may not necessarily be set in the user terminal, and values (table) corresponding to the DM-RS setting types applied to the wireless communication system may be set. Just do it.
  • UL-PTRS-RE-offset is one of the upper layer parameters, and takes a 2-bit value.
  • the index value of the DM-R antenna port is "1000"-"1005".
  • control which is applied whether the radio resource of the DC subcarrier is allocated to the predetermined signal or not.
  • Control in the case where radio resources of DC subcarriers are allocated corresponds to control based on different settings in (Control method 3) and (Control method 4) described above.
  • K ref RE is controlled according to whether the radio resource of the DC subcarrier is allocated to the predetermined signal (according to the determination result).
  • the RB level offset control uses the offset K ref RE defined by the above (Equation 2) as it is when the radio resource of the DC subcarrier is not allocated to the predetermined signal, and is allocated if it is allocated.
  • the offset K ref RE is set (changed) to a value different from that in the case where no resource is allocated. This makes it possible to use different radio resources in RB units depending on whether the radio resource of the DC subcarrier is allocated to the predetermined signal or not.
  • Equation 3 indicates an offset control value (shift value) in RB units.
  • K ref RE is changed (varied) by k DC — SC , compared to the above (Equation 2).
  • Equation 1 K ref RE is multiplied by N sc RB indicating the number of subcarriers of 12. Therefore, subcarriers to which PT-RSs are mapped are shifted in units of 1 RB.
  • k DC — SC is defined, for example, by the following (Expression 4). As apparent from (Expression 4), k DC — SC is 0 when the predetermined signal and the DC subcarrier do not collide with each other.
  • radio resources can be used in RB units depending on whether radio resources of DC subcarriers are allocated to predetermined signals or not.
  • the offset value (K ref RE ) of RE of PT-RS is controlled according to whether or not the radio resource of the DC subcarrier is allocated to the predetermined signal (according to the determination result).
  • the table shown in FIG. 5 can be used.
  • the table shown in FIG. 5 is an example, and the same values as in FIG. 4 are used for the corresponding numerical values for the sake of simplification of the description.
  • the table of FIG. 5 can be used.
  • the offset value corresponding to [1005] (DM-RS configuration type 2) is used as K ref RE .
  • UL-PTRS-RE-offset is indicated to “01” (indicated), and the radio resource of DC subcarrier is indicated in the predetermined signal (PT-RS).
  • PT-RS predetermined signal
  • the PT-RS offset value (K ref RE ) is set to “4” under the condition that it is not allocated.
  • PT-RS is selected as the DM-RS antenna port having the smallest index value among the DM-RS antenna ports allocated to PDSCH. Associate antenna ports.
  • a PT-RS antenna port is associated with a port different from the DM-RS antenna port having the smallest index value.
  • the different port may be, for example, the port with the second lowest index value among the DM-RS antenna ports assigned to the PDSCH.
  • the user terminal is scheduled with two codewords.
  • the radio resource of the DC subcarrier is not allocated to the predetermined signal, the DM-RS antenna having the smallest index value among the DM-RS antenna ports allocated to the codewords in the upper MCS Associate PT-RS antenna port to port.
  • a PT-RS antenna port is associated with a port different from the DM-RS antenna port having the smallest index value.
  • the different port may be, for example, the port with the second lowest index value among the DM-RS antenna ports assigned to the PDSCH.
  • the above-described RB level offset control, RE level offset control, and port association control may combine any control or any one control. Which control is to be performed may be determined from, for example, the network side based on a control signal transmitted by, for example, higher layer signaling.
  • wireless communication system The configuration of the wireless communication system according to the present embodiment will be described below.
  • the wireless communication method according to each aspect described above is applied. Note that the wireless communication methods according to the above aspects may be applied singly or in combination.
  • FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • the radio communication system 1 applies carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are integrated. it can.
  • the wireless communication system 1 may be called SUPER 3G, LTE-A (LTE-Advanced), IMT-Advanced, 4G, 5G, FRA (Future Radio Access), NR (New RAT), or the like.
  • the radio communication system 1 shown in FIG. 6 includes a radio base station 11 forming a macrocell C1, and radio base stations 12a to 12c disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. .
  • the user terminal 20 is arrange
  • the configuration may be such that different mermorologies are applied between cells.
  • the terminology may be at least one of subcarrier spacing, symbol length, cyclic prefix (CP) length, number of symbols per transmission time interval (TTI), and TTI time length.
  • the slot may be a unit of time based on the terminology applied by the user terminal. The number of symbols per slot may be determined according to the subcarrier spacing.
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12.
  • the user terminal 20 is assumed to simultaneously use the macro cell C1 and the small cell C2 using different frequencies by CA or DC.
  • the user terminal 20 can apply CA or DC using a plurality of cells (CCs) (for example, two or more CCs).
  • the user terminal can use the license band CC and the unlicensed band CC as a plurality of cells.
  • the user terminal 20 can perform communication in each cell (carrier) using time division duplex (TDD) or frequency division duplex (FDD).
  • TDD time division duplex
  • FDD frequency division duplex
  • the TDD cell and the FDD cell may be respectively referred to as a TDD carrier (frame configuration second type), an FDD carrier (frame configuration first type), and the like.
  • a slot having a relatively long time length eg, 1 ms
  • TTI normal TTI
  • long TTI long TTI
  • normal subframe also referred to as long subframe or subframe, etc.
  • a slot having a relatively short time length also referred to as a mini slot, a short TTI or a short subframe, etc.
  • two or more time slots may be applied in each cell.
  • Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a carrier having a narrow bandwidth (referred to as an existing carrier, Legacy carrier, etc.).
  • a carrier having a wide bandwidth in a relatively high frequency band for example, 3.5 GHz, 5 GHz, 30 to 70 GHz, etc.
  • the same carrier as that for the base station 11 may be used.
  • the configuration of the frequency band used by each wireless base station is not limited to this.
  • one or more BWPs may be set in the user terminal 20.
  • the BWP consists of at least part of the carrier.
  • a wired connection for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.
  • a wireless connection Can be configured.
  • the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
  • the upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.
  • RNC radio network controller
  • MME mobility management entity
  • the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the radio base station 12 is a radio base station having local coverage, and is a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), transmission and reception It may be called a point or the like.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.
  • Each user terminal 20 is a terminal compatible with various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals but also fixed communication terminals. Also, the user terminal 20 can perform inter-terminal communication (D2D) with another user terminal 20.
  • D2D inter-terminal communication
  • 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 that reduces interference between terminals by dividing the system bandwidth into a band consisting of one or a series of resource blocks for each terminal and a plurality of terminals use different bands. It is a system.
  • the uplink and downlink radio access schemes are not limited to these combinations, and OFDMA may be used in UL.
  • SC-FDMA can be applied to a side link (SL) used for communication between terminals.
  • SL side link
  • DL data channels (PDSCH: also referred to as Physical Downlink Shared Channel, DL shared channel etc.) shared by each user terminal 20, broadcast channel (PBCH: Physical Broadcast Channel), L1 / L2 A control channel or the like is used.
  • DL data (at least one of user data, upper layer control information, SIB (System Information Block), etc.) is transmitted by the PDSCH.
  • SIB System Information Block
  • MIB Master Information Block
  • the L1 / L2 control channel is a DL control channel (PDCCH (Physical Downlink Control Channel) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), etc. including.
  • Downlink control information (DCI) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the EPDCCH is frequency division multiplexed with the PDSCH, and is used for transmission such as DCI as the PDCCH.
  • the PHICH can transmit PUSCH delivery confirmation information (also referred to as A / N, HARQ-ACK, HARQ-ACK bit, A / N codebook, etc.).
  • a UL data channel shared by each user terminal 20 (PUSCH: also referred to as Physical Uplink Shared Channel, UL shared channel, etc.), UL control channel (PUCCH: Physical Uplink Control Channel), random An access channel (PRACH: Physical Random Access Channel) or the like is used.
  • UL data (user data and / or upper layer control information) is transmitted by the PUSCH.
  • Uplink control information (UCI: Uplink Control Information) including at least one of PDSCH delivery acknowledgment information (A / N, HARQ-ACK) channel state information (CSI) and the like is transmitted by the PUSCH or PUCCH.
  • the PRACH can transmit a random access preamble for establishing a connection with a cell.
  • FIG. 7 is a diagram showing an example of the entire configuration of the radio base station according to the present embodiment.
  • the radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • Each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.
  • the radio base station 10 may configure a “receiving device” in UL and may configure a “transmitting device” in DL.
  • User data transmitted from the radio base station 10 to the user terminal 20 by downlink 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 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data.
  • Control Retransmission control (for example, processing of HARQ (Hybrid Automatic Repeat reQuest)), scheduling, transmission format selection, channel coding, rate matching, scrambling, Inverse Fast Fourier Transform (IFFT) processing and precoding Transmission processing such as at least one of the processing is performed and transferred to the transmission / reception unit 103.
  • HARQ Hybrid Automatic Repeat reQuest
  • IFFT Inverse Fast Fourier Transform
  • Transmission processing such as at least one of the processing is performed and transferred to the transmission / reception unit 103.
  • transmission processing such as channel coding and / or inverse fast Fourier transform is performed and transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output from the baseband signal processing unit 104 for each antenna into a radio frequency band and transmits the baseband signal.
  • the radio frequency signal frequency-converted by the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101.
  • the transmitter / receiver, the transmitting / receiving circuit or the transmitting / receiving device described based on the common recognition in the technical field according to the present invention can be constituted.
  • the transmitting and receiving unit 103 may be configured as an integrated transmitting and receiving unit, or may be configured from a transmitting unit and a receiving unit.
  • the radio frequency signal received by the transmitting and receiving antenna 101 is amplified by the amplifier unit 102.
  • the transmitting and receiving unit 103 receives the UL signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on UL data included in the input UL signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs at least one of setting of a communication channel, call processing such as release, status management of the radio base station 10, and management of radio resources.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the adjacent wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). It is also good.
  • an inter-base station interface for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface.
  • the transmission / reception unit 103 may be a DL signal (for example, at least one of a DL control signal (also referred to as DL control channel or DCI), a DL data signal (also referred to as DL data channel or DL data), and a reference signal)
  • a DL control signal also referred to as DL control channel or DCI
  • a DL data signal also referred to as DL data channel or DL data
  • a reference signal Send
  • the transmission / reception unit 103 may be a UL signal (for example, at least one of a UL control signal (also referred to as UL control channel or UCI), a UL data signal (also referred to as UL data channel or UL data), and a reference signal)
  • the transmission / reception unit 103 may transmit upper layer control information (for example, control information by MAC CE and / or RRC signaling).
  • upper layer control information for example, control information by MAC CE and / or RRC signaling.
  • the transmission / reception unit 103 may perform at least one of uplink communication and downlink communication with the user terminal 20 using the radio resource of the DC subcarrier.
  • the transmission / reception unit 103 may use a downlink shared channel (for example, a PDSCH carrying an RMSI and / or a paging message), a control resource set (CORESET including a PDCSI scheduling a PDSCH carrying an RMSI and / or a paging message), and a synchronization signal block
  • a predetermined signal eg, WUS
  • WUS wireless local area network
  • TDM time-multiplexed
  • FDM frequency-multiplexed
  • FIG. 8 is a diagram showing an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 8 mainly shows the functional blocks of the characterizing portion in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes 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 wireless base station 10.
  • the control unit 301 may, for example, generate a DL signal by the transmission signal generation unit 302, map the DL signal by the mapping unit 303, receive processing (for example, demodulation) of the UL signal by the reception signal processing unit 304, and measure it by the measurement unit 305.
  • Control at least one of Also, the control unit 301 may control scheduling of data channels (including DL data channels and / or UL data channels).
  • control unit 301 generates a signal by the transmission signal generation unit 302 (including a signal corresponding to at least one of synchronization signal, RMSI, MIB, paging channel, system information, and broadcast channel (broadcast signal)), and a mapping unit Control at least one of allocation of signals by 303 and the like.
  • a signal by the transmission signal generation unit 302 including a signal corresponding to at least one of synchronization signal, RMSI, MIB, paging channel, system information, and broadcast channel (broadcast signal)
  • a mapping unit Control at least one of allocation of signals by 303 and the like.
  • the control unit 301 may control the transmission direction for each symbol in a time unit (for example, slot) which is a scheduling unit of the DL data channel. Specifically, the control unit 301 may control generation and / or transmission of slot format related information (SFI) indicating DL symbols and / or UL symbols in the slot.
  • SFI slot format related information
  • control unit 301 configures one or more BWPs, and uses TDP (time division duplex) or FDD (frequency division duplex) with the user terminal 20 using the set BWPs. You may control to perform line communication.
  • TDP time division duplex
  • FDD frequency division duplex
  • the control unit 301 determines whether the radio resource of C subcarrier is allocated or not (whether the predetermined signal and the DC subcarrier collide or not) when transmitting the predetermined signal or receiving the predetermined signal. Good. Specifically, the determination methods 1 and 2 described above may be applied.
  • control unit 301 may perform control for downlink signal transmission based on the determination result.
  • control includes at least one of mapping, coding processing, rate matching, puncturing, and modulation processing.
  • control unit 301 may perform control for uplink signal reception based on the determination result.
  • control includes at least one of demapping, decoding, de-rate matching, depuncturing, and demodulation.
  • At least one of the control methods 1-4 described above may be applied to control for uplink signal reception and control for downlink signal transmission.
  • the control unit 301 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 302 generates a DL signal (including at least one of DL data (channel), DCI, DL reference signal, and control information by upper layer signaling) based on an instruction from the control unit 301, It may be output to the mapping unit 303.
  • the transmission signal generation unit 302 can be a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.
  • the mapping unit 303 maps the DL signal generated by the transmission signal generation unit 302 on a predetermined radio resource based on an instruction from the control unit 301, and outputs the DL signal to the transmission / reception unit 103.
  • the mapping unit 303 maps the reference signal to a predetermined radio resource using the arrangement pattern determined by the control unit 301.
  • the mapping unit 303 may be a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 performs reception processing (for example, at least one of demapping, demodulation, and decoding) of the UL signal transmitted from the user terminal 20. Specifically, the reception signal processing unit 304 may output the reception signal and / or the signal after reception processing to the measurement unit 305.
  • reception processing for example, at least one of demapping, demodulation, and decoding
  • the received signal processing unit 304 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Further, the received signal processing unit 304 can constitute a receiving unit according to the present invention.
  • the measurement unit 305 measures the channel quality of UL based on, for example, received power of a reference signal (for example, reference signal received power (RSRP)) and / or received quality (for example, reference signal received quality (RSRQ)). May be The measurement result may be output to the control unit 301.
  • a reference signal for example, reference signal received power (RSRP)
  • RSSQ reference signal received quality
  • FIG. 9 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201 for MIMO transmission, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the user terminal 20 may configure a “transmitting device” in UL and may configure a “receiving device” in DL.
  • the radio frequency signals received by the plurality of transmitting and receiving antennas 201 are amplified by the amplifier unit 202, respectively.
  • Each transmission / reception unit 203 receives the DL signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs at least one of FFT processing, error correction decoding, reception processing of retransmission control, and the like on the input baseband signal.
  • the DL data is transferred to the application unit 205.
  • the application unit 205 performs processing on a layer higher than the physical layer and the MAC layer.
  • UL data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs at least one of retransmission control processing (for example, processing of HARQ), channel coding, rate matching, puncturing, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
  • the data is transferred to each transmission / reception unit 203.
  • UCI eg, A / N of DL signal, channel state information (CSI), scheduling request (SR), etc.
  • CSI channel state information
  • SR scheduling request
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
  • the radio frequency signal frequency-converted by the transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.
  • the transmitting / receiving unit 203 is a DL signal (for example, at least one of a DL control signal (also referred to as DL control channel or DCI), a DL data signal (also referred to as DL data channel or DL data), and a reference signal) Receive
  • the transmission / reception unit 203 is a UL signal (for example, at least one of a UL control signal (also referred to as a UL control channel or UCI), a UL data signal (also referred to as a UL data channel or UL data), and a reference signal)
  • a DL control signal also referred to as DL control channel or DCI
  • a DL data signal also referred to as DL data channel or DL data
  • a reference signal for example, at least one of a UL control signal (also referred to as a UL control channel or UCI), a UL data signal (also referred to as a UL data channel or UL data), and a reference signal)
  • the transmitting / receiving unit 203 may receive upper layer control information (for example, control information by MAC CE and / or RRC signaling).
  • upper layer control information for example, control information by MAC CE and / or RRC signaling.
  • the transmission / reception unit 203 uses TDL (time division multiple overlapping signals) using a DL / UL frequency band pair (DL / UL BWP pair) having a UL frequency band and a DL frequency band set in the frequency direction in the carrier. May transmit and receive signals and / or information.
  • TDL time division multiple overlapping signals
  • the transmission / reception unit 203 may perform at least one of the radio base station, uplink communication, and downlink communication using the radio resource of the DC subcarrier.
  • the transmission / reception unit 203 can be a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on the 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 transmission / reception unit 203 may use a downlink shared channel (for example, a PDSCH carrying an RMSI and / or a paging message), a control resource set including a downlink control channel for scheduling the downlink shared channel (a PDSCH carrying an RMSI and / or a paging message).
  • a downlink shared channel for example, a PDSCH carrying an RMSI and / or a paging message
  • a control resource set including a downlink control channel for scheduling the downlink shared channel (a PDSCH carrying an RMSI and / or a paging message).
  • One of the periodic radio resources eg, WUS resources
  • TDM time multiplexed
  • FDM frequency multiplexed
  • the synchronization signal block eg, SS block
  • the CORESET that includes the PDCCH to be scheduled
  • a predetermined signal eg, WUS
  • FIG. 10 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • the functional block of the characteristic part in this Embodiment is mainly shown, and it is assumed that the user terminal 20 also has the other functional block required for wireless communication.
  • the baseband signal processing unit 204 included in the user terminal 20 includes 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. Have.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 controls, for example, at least one of UL signal generation by the transmission signal generation unit 402, mapping of the UL signal by the mapping unit 403, reception processing of the DL signal by the reception signal processing unit 404, and measurement by the measurement unit 405. Do.
  • control unit 401 configures one or more BWPs, and uses TDPs (time division duplex) or FDD (frequency division duplex) with the radio base station 10 using the set BWPs. Control to perform line communication.
  • TDPs time division duplex
  • FDD frequency division duplex
  • the control unit 401 determines whether a radio resource of C subcarrier is allocated or not (whether the predetermined signal and the DC subcarrier collide or not) when transmitting a predetermined signal or receiving a predetermined signal. Good. Specifically, the determination methods 1 and 2 described above may be applied.
  • control unit 401 may perform control for downlink signal reception based on the determination result.
  • control includes at least one of demapping, decoding, de-rate matching, depuncturing, and demodulation.
  • control unit 401 may perform control for uplink signal transmission based on the determination result.
  • control includes at least one of mapping, coding processing, rate matching, puncturing, and modulation processing.
  • At least one of the control methods 1-4 described above may be applied to control for uplink signal reception and control for downlink signal transmission.
  • the transmitting and receiving unit 203 performs at least one of transmission and reception of a predetermined signal in a predetermined frequency band, and the control unit 401 controls the predetermined signal to be a DC current (Direct Current subcarrier) corresponding to the center of the frequency band.
  • DC current Direct Current subcarrier
  • the control unit 401 may determine, on a resource element basis or a resource block basis, whether the radio resource of the DC subcarrier is allocated to the predetermined signal.
  • the control unit 401 may control at least one of transmission and reception of the predetermined signal based on a configuration different from the case where the radio resource of the DC subcarrier is not allocated to the predetermined signal.
  • the setting may indicate at least one of subcarrier allocation defined in resource block units or resource element units, the number of repetitions of the predetermined signal in a predetermined time region, and a coding rate.
  • a radio resource of a subcarrier different from the DC subcarrier is further allocated to the predetermined signal, and the control unit 401 performs puncturing or rate matching using the radio resource of the DC subcarrier as a vacant resource, The at least one of reception may be controlled.
  • a radio resource of a subcarrier different from the DC subcarrier is further allocated to the predetermined signal, and the control unit 401 performs an encoding process using the radio resource of the different subcarrier to transmit and receive signals.
  • the at least one may be controlled.
  • the control unit 401 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
  • Transmission signal generation unit 402 generates retransmission control information of UL signal and DL signal (for example, coding, rate matching, puncturing, modulation, etc.) based on an instruction from control unit 401, and outputs the result to mapping unit 403. Do.
  • the transmission signal generation unit 402 can be a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.
  • the mapping unit 403 may be a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, at least one of demapping, demodulation, and decoding) of the DL signal.
  • reception processing for example, at least one of demapping, demodulation, and decoding
  • the reception signal processing unit 404 may demodulate the DL data channel using the reference signal of the arrangement pattern determined by the control unit 401.
  • the reception signal processing unit 404 may output the reception signal and / or the signal after reception processing to the control unit 401 and / or the measurement unit 405.
  • the reception signal processing unit 404 outputs, for example, upper layer control information by upper layer signaling, L1 / L2 control information (for example, UL grant and / or DL assignment), and the like to the control unit 401.
  • the received signal processing unit 404 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Further, the received signal processing unit 404 can constitute a receiving unit according to the present invention.
  • Measuring section 405 measures a channel state based on a reference signal (for example, CSI-RS) from radio base station 10, and outputs the measurement result to control section 401.
  • the channel state measurement may be performed for each CC.
  • the measuring unit 405 can be composed of a signal processor, a signal processing circuit or a signal processing device, and a measuring instrument, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
  • each functional block is realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.
  • the wireless base station, the user terminal and the like in the present embodiment may function as a computer that performs the process of the wireless communication method of the present invention.
  • FIG. 11 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the present embodiment.
  • the above-described wireless 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. Good.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 is performed, for example, by causing a processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs an operation. This is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above embodiments 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, or may be realized similarly for other functional blocks.
  • the memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or any other suitable storage medium. It may consist of 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 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 invention.
  • the storage 1003 is a computer readable recording medium, and for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be composed of
  • the storage 1003 may be called an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) 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, and the like) 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 shown in FIG. 11 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
  • radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • the channels and / or symbols may be signaling.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • a radio frame may be configured with one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe.
  • a subframe may be configured with one or more slots in the time domain.
  • the subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.
  • a slot may be configured with one or more symbols (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.) in the time domain.
  • the slot may be a time unit based on the neurology.
  • the slot may include a plurality of minislots. Each minislot may be comprised of one or more symbols in the time domain.
  • a radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal.
  • subframes, slots, minislots and symbols other names corresponding to each may be used.
  • one subframe may be referred to as a transmission time interval (TTI)
  • TTI transmission time interval
  • a plurality of consecutive subframes may be referred to as a TTI
  • one slot or one minislot may be referred to as a TTI.
  • TTI transmission time interval
  • the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the radio base station performs scheduling to allocate radio resources (such as frequency bandwidth and / or transmission power that can be used in each user terminal) to each user terminal on a TTI basis.
  • the TTI may be a transmission time unit of a channel coded data packet (transport block) or may be a processing unit such as scheduling and / or link adaptation. If one slot or one minislot is referred to as TTI, one or more TTIs (ie, one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (the number of minislots) 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, or the like.
  • a TTI shorter than a normal TTI may be referred to as a short TTI, a short TTI, a partial TTI (partial or fractional TTI), a short subframe, a short subframe, or the like.
  • a resource block is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an 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 and one subframe may be configured of one or more resource blocks, respectively.
  • the RB may be called a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, or the like.
  • a resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • one RE may be one subcarrier and one symbol radio resource region.
  • the above-described structures such as the radio frame, subframe, slot, minislot and symbol 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 included in a slot or minislot, and subcarriers included in an RB
  • the number of symbols in TTI, symbol length, cyclic prefix (CP) length, and other configurations may be variously changed.
  • the information, parameters, and the like described in the present specification may be represented by absolute values, may be represented by relative values from predetermined values, or may be represented by corresponding other information.
  • the radio resources may be indicated by a predetermined index.
  • the formulas etc. that use these parameters may differ from those explicitly disclosed herein.
  • data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
  • information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • the input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.
  • notification of information is not limited to the aspects / embodiments described herein, and may be performed in other manners.
  • notification of information may be physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling, other signals, or a combination thereof.
  • DCI downlink control information
  • UCI uplink control information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).
  • notification of predetermined information is not limited to what is explicitly performed, but implicitly (for example, by not notifying the predetermined information or another It may be performed by notification of information.
  • the determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.
  • Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • system and "network” as used herein are used interchangeably.
  • base station Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell cell
  • cell group cell group
  • carrier carrier
  • component carrier component carrier
  • a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
  • a base station may accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station for indoor use (RRH: Communication service can also be provided by Remote Radio Head).
  • RRH Communication service can also be provided by Remote Radio Head.
  • the terms "cell” or “sector” refer to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
  • Node station Node station
  • NodeB NodeB
  • eNodeB eNodeB
  • access point access point
  • transmission point reception point
  • femtocell small cell, and so on.
  • the mobile station may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, by those skilled in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client or some other suitable term.
  • the radio base station in the present specification may be replaced with a user terminal.
  • each aspect / embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
  • the user terminal 20 may have a function that the above-described radio base station 10 has.
  • “up” and / or “down” may be read as “side”.
  • the upstream channel may be read as a side channel.
  • a user terminal herein may be read at a radio base station.
  • the radio base station 10 may have a function that the above-described user terminal 20 has.
  • the specific operation to be performed by the base station may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, it is apparent that it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. but not limited thereto or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile) Communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-Wide Band), Bluetooth (registered trademark),
  • the present invention may be applied to a system utilizing another appropriate wireless communication method of and / or an extended next generation system based on these.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using the designation "first,” “second,” etc. as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.
  • determining may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as “determining”. Also, “determination” may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as “determining” (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, “determination” may be considered as “determining” some action.
  • the terms “connected”, “coupled”, or any variation thereof are any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements “connected” or “connected” to each other.
  • the coupling or connection between elements may be physical, logical or a combination thereof.
  • the two elements are by using one or more wires, cables and / or printed electrical connections, and radio frequency as some non-limiting and non-exclusive examples. It can be considered “connected” or “coupled” to one another by using electromagnetic energy such as electromagnetic energy having wavelengths in the region, microwave region and light (both visible and invisible) regions.

Landscapes

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

Abstract

La présente invention réalise une communication en utilisant efficacement des ressources sans fil, lorsqu'il est prévu que la dégradation du signal se produira localement dans une ressource de fréquence, en réduisant au minimum l'impact d'une telle dégradation de signal. Ce terminal d'utilisateur est doté : d'une unité d'émission/réception servant à recevoir et/ou émettre un signal prédéterminé dans une bande de fréquences prédéterminée ; et d'une unité de commande qui, dans le cas où une ressource sans fil pour une sous-porteuse de courant continu (CC) correspondant au centre de la bande de fréquences est attribuée au signal prédéterminé, réalise une commande pour recevoir et/ou émettre le signal prédéterminé.
PCT/JP2018/000549 2018-01-11 2018-01-11 Terminal utilisateur et procédé de communication sans fil WO2019138523A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114503639A (zh) * 2019-07-19 2022-05-13 株式会社Ntt都科摩 终端以及无线通信方法
CN114788235A (zh) * 2019-10-10 2022-07-22 株式会社Ntt都科摩 终端以及无线通信方法

Non-Patent Citations (3)

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Title
ERICSSON: "On the collision between DRMS and DC subcarriers", 3GPP TSG-RAN WGL#90BIS RL-1718454, 3 October 2017 (2017-10-03), XP051353052 *
ERICSSON: "Remaining details on PTRS design", 3GPP TSG-RAN WG1#91 RL-1720741, vol. 2, no. 1, 18 November 2017 (2017-11-18), pages 6, XP051370199 *
SAMSUNG ET AL.: "WF on DMRS and DC subcarrier", 3GPP TSG-RAN WGL#88BIS RL-1706711, 9 April 2017 (2017-04-09), XP051252925 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114503639A (zh) * 2019-07-19 2022-05-13 株式会社Ntt都科摩 终端以及无线通信方法
CN114503639B (zh) * 2019-07-19 2024-03-12 株式会社Ntt都科摩 终端以及无线通信方法
CN114788235A (zh) * 2019-10-10 2022-07-22 株式会社Ntt都科摩 终端以及无线通信方法
CN114788235B (zh) * 2019-10-10 2024-04-02 株式会社Ntt都科摩 终端以及无线通信方法

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