WO2019163113A1 - Équipement utilisateur et procédé de communication radio - Google Patents

Équipement utilisateur et procédé de communication radio Download PDF

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Publication number
WO2019163113A1
WO2019163113A1 PCT/JP2018/006831 JP2018006831W WO2019163113A1 WO 2019163113 A1 WO2019163113 A1 WO 2019163113A1 JP 2018006831 W JP2018006831 W JP 2018006831W WO 2019163113 A1 WO2019163113 A1 WO 2019163113A1
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WIPO (PCT)
Prior art keywords
waveform
signal
terminal
base station
ofdm
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PCT/JP2018/006831
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English (en)
Japanese (ja)
Inventor
真哉 岡村
和晃 武田
大樹 武田
Original Assignee
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 PCT/JP2018/006831 priority Critical patent/WO2019163113A1/fr
Publication of WO2019163113A1 publication Critical patent/WO2019163113A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

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 a successor system of LTE is also being studied for the purpose of further widening the bandwidth and speeding up from LTE.
  • LTE successors include LTE-A (LTE-Advanced), FRA (Future Radio Access), 5G (5th generation mobile mobile communication system), 5G + (5G plus), New-RAT (Radio Access Technology), etc. There is what is called.
  • the waveform of the uplink (direction from user terminal to base station, UL) signal (waveform), CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing), and DFT (Discrete Fourier)
  • DFT-S-OFDM DFT Spread OFDM
  • the user terminal determines whether the radio base station uses CP-OFDM or DFT-S-OFDM for the uplink signal waveform using RRC (Radio Resource Control) signal link or RMSI (Remaining Minimum System Information). It is also being considered to instruct.
  • RRC Radio Resource Control
  • RMSI Remaining Minimum System Information
  • One embodiment of the present invention provides a new configuration that can flexibly switch the waveform of an uplink signal in a future wireless communication system.
  • a user terminal is a user terminal that transmits an uplink signal to which one of the first and second waveforms is applied to a radio base station, which is instructed by the radio base station.
  • a control unit that selects a waveform to be applied to the uplink signal according to the allocation of resources for the uplink signal, and a transmission unit that transmits the uplink signal to which the selected waveform is applied to the radio base station And.
  • FIG. 3 is a block diagram illustrating a configuration example of a transmitter included in a user terminal according to Embodiment 1.
  • FIG. 3 is a block diagram illustrating a configuration example of a receiver included in the radio base station according to Embodiment 1.
  • FIG. 6 is a diagram for explaining an example of a signal waveform selection method applied to uplink in the user terminal according to Embodiment 1.
  • FIG. It is a figure explaining an example of the selection method of the signal waveform applied to UL in the user terminal which concerns on Embodiment 1.
  • FIG. 1 It is a figure explaining the method 1 in which a user terminal selects the signal waveform of UL in the case of UL resource allocation type "0" which concerns on Embodiment 1.
  • FIG. 2 It is a figure explaining the method 2 by which a user terminal selects the UL signal waveform in the case of UL resource allocation type "0" which concerns on Embodiment 1.
  • FIG. 2 It is a figure explaining the method 2 by which a user terminal selects the UL signal waveform in the case of UL resource allocation type "0” which concerns on Embodiment 1.
  • FIG. It is a figure explaining the method for a terminal to select the UL signal waveform according to UL resource allocation type which concerns on Embodiment 2.
  • FIG. 1 It is a figure explaining the method 1 in which a user terminal selects the signal waveform of UL in the case of UL resource allocation type "0" which concerns on Embodiment 1.
  • FIG. It is a figure explaining the method 2 by which a user terminal selects the
  • FIG. 10 is a diagram illustrating an example of an MCS (Modulation and Coding Scheme) index table for DFT-S-OFDM and an MCS index table for CP-OFDM according to the third embodiment. It is a figure which shows an example of the hardware constitutions of the user terminal and radio
  • MCS Modulation and Coding Scheme
  • CP-OFDM may be referred to as a first waveform
  • DFT-S-OFDM may be referred to as a second waveform
  • the radio communication system according to Embodiment 1 includes at least a user terminal (hereinafter referred to as “terminal”) 10 illustrated in FIG. 1 and a radio base station (hereinafter referred to as “base station”) 20 illustrated in FIG.
  • the terminal 10 is connected to the base station 20.
  • the base station 20 transmits a DL (Down Link) signal to the terminal 10.
  • the DL signal includes, for example, a DL data signal (for example, PDSCH (Physical Downlink Shared Channel)) and a DL control signal (for example, PDCCH (Physical Downlink Control Channel) for demodulating and decoding the DL data signal). It is.
  • the terminal 10 transmits a UL (Up Link) signal to the base station 20.
  • the UL signal includes, for example, an UL data signal (eg, PUSCH (Physical Uplink Shared Channel)) and an UL control signal (e.g., PUCCH (Physical Uplink Control Channel)) for demodulating and decoding the UL data signal. It is.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • FIG. 1 is a block diagram illustrating a configuration example of a transmitter included in terminal 10 according to Embodiment 1.
  • 1 includes a control unit 101, a preprocessing unit 102, a mapping unit 103, an IFFT unit 104, a post-processing unit 105, a transmission unit 106, and an antenna 107.
  • the control unit 101 selects a waveform according to the resource (subcarrier) in the frequency domain allocated for the uplink signal of the own terminal 10, and performs pre-processing unit 102, mapping unit 103, and post-processing unit In step 105, the selected waveform is designated.
  • the selected waveform is, for example, CP-OFDM or DTF-S-OFDM. Allocation of uplink signal resources for each terminal 10 may be instructed by the base station 20. Details of the waveform selection method in the control unit 101 will be described later.
  • the preprocessing unit 102 performs preprocessing on the input data (modulation symbol sequence) according to the signal waveform instructed from the control unit 101, and outputs the preprocessed signal to the mapping unit 103. For example, when CP-OFDM is instructed, the preprocessing unit 102 generates a frequency domain signal by performing serial-parallel conversion on the data, and outputs the obtained frequency domain signal to the mapping unit 103. For example, when DFT-S-OFDM is instructed, the preprocessing unit 102 performs time-parallel signal conversion on the data to generate a time domain signal, further performs discrete Fourier transform, and maps the obtained frequency domain signal to the mapping unit 103. Output to.
  • the mapping unit 103 maps the frequency domain signal output from the preprocessing unit 102 to the resource (subcarrier, symbol) corresponding to the waveform instructed from the control unit 101. Further, mapping section 103 maps 0 to subcarriers other than the subcarrier to which the frequency domain signal is mapped. Then, mapping section 103 outputs the frequency domain signal after mapping to IFFT (Inverse Fast Fourier Transform) section 104.
  • IFFT Inverse Fast Fourier Transform
  • the IFFT unit 104 performs inverse fast Fourier transform on the frequency domain signal output from the mapping unit 103, and outputs the obtained time domain signal to the post-processing unit 105.
  • the post-processing unit 105 performs post-processing on the time domain signal output from the IFFT unit 104 according to the waveform instructed from the control unit 101, and outputs the post-processed signal to the transmission unit 106.
  • the post-processing unit 105 inserts a CP into the time domain signal output from the IFFT unit 104, performs parallel-serial conversion, and outputs the result to the transmission unit 106.
  • the transmission unit 106 performs RF (Radio-Frequency) processing such as D / A (Digital-to-Analog) conversion, up-conversion, and amplification on the time domain signal (UL signal) output from the post-processing unit 105. Then, a radio signal is transmitted to the base station 20 via the antenna 107.
  • RF Radio-Frequency
  • FIG. 2 is a block diagram illustrating a configuration example of a receiver included in the base station 20 according to the first embodiment. 2 includes a control unit 201, an antenna 202, a reception unit 203, a preprocessing unit 204, an FFT (Fast Fourier Transform) unit 205, a signal detection unit 206, a post processing unit 207, and the like. Have.
  • the control unit 201 selects a waveform according to the resource (subcarrier) in the frequency domain allocated for the uplink signal of the terminal 10, and sends the waveform to the preprocessing unit 204, the signal detection unit 206, and the postprocessing unit 207. Indicate the selected waveform.
  • the base station 20 may instruct each terminal 10 to allocate resources for uplink signals.
  • the receiving unit 203 performs RF processing such as amplification, down-conversion, and A / D (Analog-to-Digital) conversion on the radio signal received by the antenna 202, and a baseband time domain signal (UL signal). Is output to the preprocessing unit 204.
  • RF processing such as amplification, down-conversion, and A / D (Analog-to-Digital) conversion on the radio signal received by the antenna 202, and a baseband time domain signal (UL signal).
  • the preprocessing unit 204 performs preprocessing on the time domain signal output from the reception unit 203 according to the waveform instructed from the control unit 201, and outputs the preprocessed signal to the FFT unit 205.
  • the preprocessing unit 204 performs serial-parallel conversion on the time domain signal output from the reception unit 203, removes the added CP, and outputs the CP to the FFT unit 205.
  • the FFT unit 205 performs fast Fourier transform on the time domain signal output from the preprocessing unit 204, and outputs the obtained frequency domain signal to the signal detection unit 206.
  • the signal detection unit 206 performs equalization processing corresponding to the waveform instructed by the control unit 201 on the signal output from the FFT unit 205, and outputs the equalized signal to the post-processing unit 207.
  • the post-processing unit 207 performs post-processing on the frequency domain signal output from the signal detection unit 206 according to the waveform instructed from the control unit 201, and obtains output data (modulation symbol string). For example, when CP-OFDM is instructed, the post-processing unit 207 performs parallel-serial conversion on the frequency domain signal output from the signal detection unit 206 to obtain output data. Further, when DFT-S-OFDM is instructed, the post-processing unit 207 performs inverse discrete Fourier transform on the frequency domain signal output from the signal detection unit 206, and performs parallel processing on the obtained time domain signal. Perform serial conversion to obtain output data.
  • 3A and 3B are diagrams illustrating an example of a waveform selection method applied to the UL in the terminal 10.
  • the terminal 10 selects a waveform to be applied to the UL signal according to the number of RBs (Resource Blocks) in the frequency domain (hereinafter referred to as “RB allocation number”) allocated to the terminal 10 itself. For example, the terminal 10 (control unit 101) selects CP-OFDM when the number of RB allocations is equal to or greater than the threshold X RB (X RB is an integer equal to or greater than 2), and DFT when the number of RB allocations is less than the threshold X RB. -Select S-OFDM.
  • the terminal 10 can dynamically switch the waveform applied to the UL signal according to the number of allocated RBs.
  • the base station 20 can instruct the terminal 10 as to the waveform to be applied to the UL signal by changing the number of RBs allocated to the UL signal of the terminal 10.
  • CP-OFDM is associated with the number of RB allocations above the threshold and DFT-S-OFDM is associated with the number of RB allocations below the threshold is, for example, for the following reason.
  • DFT-S-OFDM with a low PAPR (Peak-to-Average Power Ratio) to the UL signal.
  • PAPR Peak-to-Average Power Ratio
  • CP-OFDM to the UL signal because high throughput is obtained and RB allocation may be discontinuous.
  • the base station 20 measures the channel quality, and assigns the number of RBs less than the threshold value XRB to the UL signal such as the terminal 10 having a low channel quality (for example, a terminal located at the end of the cell).
  • the terminal 10 selects DFT-S-OFDM as a waveform applied to the UL signal. Thereby, the PAPR in the terminal 10 is reduced.
  • the base station 20 measures channel quality
  • terminal 10 e.g., terminal located at the center of the cell
  • channel quality is high assign RB number equal to or larger than the threshold value X RB to the UL signal or the like.
  • the terminal 10 selects CP-OFDM as a waveform applied to the UL signal. Thereby, the throughput of UL increases.
  • the parameter indicating channel quality include RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), path loss (propagation loss), SINR (Signal Noise Interference Ratio), and the like.
  • the threshold X RB is to the RRC signaling or RMSI like upper layer may be notified to the terminal 10, it may be predetermined by the specification. Further, in the present embodiment, the frequency bandwidth allocated to the terminal 10 or the CORESET frequency bandwidth may be used instead of the number of RB allocations.
  • the RBG Resource Block Group
  • the RBG includes a plurality of RBs.
  • the terminal 10 has a case where the resource allocated to the UL signal is indicated by the RB and a case where the resource is indicated by the RBG. Whether to be designated by RB or RBG is set by the UL resource allocation type. For example, when the UL resource allocation type “0” is set, it is instructed by the RBG, and when the UL resource allocation type “1” is set, it is instructed by the RB. The UL resource allocation type may be instructed from the base station 20 to the terminal 10.
  • the UL resource allocation type “0” may be referred to as a second type, and the UL resource allocation type “1” may be referred to as a first type.
  • the terminal 10 may select a waveform to be applied to the UL signal by the method described above with reference to FIG.
  • the terminal 10 may select a waveform to be applied to the UL signal by either the following method 1 or method 2.
  • 4A and 4B are diagrams illustrating a method 1 for selecting a waveform to be applied to the UL signal by the terminal 10 in the case of the UL resource allocation type “0”.
  • 4A and 4B are examples in which 1 RBG is composed of 3 RBs.
  • the terminal 10 selects a waveform to be applied to the UL signal according to the number of RBGs assigned to the terminal 10 in the frequency domain (hereinafter referred to as “RBG allocation number”). For example, the terminal 10 (control unit 101) selects CP-OFDM when the RBG allocation number is equal to or greater than a threshold X RBG (X RBG is an integer equal to or greater than 2), and DFT when the RBG allocation number is less than the threshold X RBG. -Select S-OFDM.
  • the terminal 10 selects CP-OFDM.
  • the terminal 10 selects DFT-S-OFDM.
  • the terminal 10 can dynamically switch the waveform applied to the UL signal according to the number of RBG allocations.
  • the base station 20 can instruct the terminal 10 about a waveform to be applied to the UL signal by changing the number of RBGs allocated to the UL signal of the terminal 10.
  • the terminal 10 when the base station 20 assigns the number of RBGs less than the threshold X RBG to the UL signal of the terminal 10 located at the end of the cell, the terminal 10 applies DFT-S-OFDM to the UL signal. Thereby, the PAPR in the terminal 10 is reduced.
  • the terminal 10 selects CP-OFDM as the UL signal. This increases the throughput of the UL signal.
  • the threshold value X RBG may be notified by higher layer RRC signaling or RMSI, or may be determined in advance by specifications.
  • FIGS. 5A and 5B are diagrams illustrating a method 2 for selecting a waveform to be applied to the UL signal by the terminal 10 in the case of the UL resource allocation type “0”.
  • the terminal 10 selects a waveform to be applied to the UL signal according to whether a plurality of RBGs assigned to the terminal 10 are continuous or discontinuous. For example, the terminal 10 (control unit 101) selects DFT-S-OFDM when the RBGs allocated to the terminal 10 are continuous, and the RBGs allocated to the terminal 10 are discontinuous. Select CP-OFDM. Note that the terminal 10 may determine that the number of assigned RBGs is one as continuous.
  • RBG1 and RBG4 are assigned discontinuously. In this case, the terminal 10 selects CP-OFDM.
  • RBG1 and RBG2 are continuously assigned. In this case, the terminal 10 selects DFT-S-OFDM.
  • the terminal 10 can dynamically switch the waveform applied to the UL signal according to whether the plurality of RBGs assigned to the terminal 10 are continuous or discontinuous.
  • the base station 20 instructs the terminal 10 on a waveform to be applied to the UL signal depending on whether the RBG is assigned continuously or discontinuously to the UL signal of the terminal 10. be able to.
  • 5A and 5B have described whether the RBG assignment is continuous or discontinuous, the present embodiment can also be applied to whether the RB assignment is continuous or discontinuous.
  • FIG. 3A, FIG. 3B, FIG. 4A, and FIG. 4B have described the case where there is one threshold value, this embodiment can also be applied to cases where there are two or more threshold values.
  • a threshold value Y RB (> X RB ) is provided, and when the RB allocation number is Y RB or more, the terminal 10 (control unit 101) A waveform different from S-OFDM may be selected.
  • threshold value Y RBG (> X RBG ) is provided, and when the number of RBG allocations is equal to or greater than Y RBG , terminal 10 (control unit 101) A waveform different from DFT-S-OFDM may be selected.
  • the control unit 101 of the user terminal 10 selects a waveform to be applied to the UL signal according to resource allocation in the frequency domain for the UL signal. For example, the control unit 101 selects CP-OFDM when the RB allocation number or the RBG allocation number for the UL signal is equal to or greater than the threshold, and selects DFT-S-OFDM when it is less than the threshold. Alternatively, the control unit 101 selects CP-OFDM when the RB or RBG assignment to the UL is discontinuous, and selects DFT-S-OFDM when it is continuous.
  • the terminal 10 can dynamically switch the waveform applied to the UL signal according to the allocation of the resource for the UL signal.
  • Embodiment 2 In Embodiment 2, an example will be described in which the control unit 101 of the user terminal 10 selects a waveform to be applied to the UL signal in accordance with the setting of the UL resource allocation type.
  • 6A and 6B are diagrams illustrating a method for selecting a waveform to be applied to the UL signal by the terminal 10 according to the UL resource allocation type.
  • the terminal 10 selects a waveform to be applied to the UL signal according to the UL resource allocation type set in the terminal 10 itself. For example, the terminal 10 selects CP-OFDM when the UL resource allocation type “0” is set, and selects DFT-S-OFDM when the UL resource allocation type “1” is set.
  • the terminal 10 can select a waveform to be applied to the UL signal according to whether the set UL resource allocation type is “0” or “1”.
  • CP-OFDM may be associated with UL resource allocation type “0”, and the minimum value X min may be determined for the number of RBs constituting the RBG. For example, as shown in FIG. 6A, when the minimum value X min is 5, the RBG is composed of 5 or more RBs (6 RBs in FIG. 6A).
  • each RBG assigned to the terminal 10 is expressed by 1 bit.
  • the RBG assignment instruction information shown in FIG. 4A is expressed by 17 bits of RBG0 to RBG16.
  • the RBG assignment instruction information shown in FIG. 6A can be expressed by 9 bits of RBG0 to RBG8. That is, the data amount (number of bits) of the RBG allocation instruction information can be reduced by setting the minimum value Xmin to a large value.
  • DFT-S-OFDM may be associated with UL resource allocation type “1”, and the maximum value X max may be determined for the number of RB allocations.
  • the maximum value X max may correspond to the maximum value (for example, the threshold value X RB in FIG. 3B) of the number of RB allocations when DFT-S-OFDM is selected as described with reference to FIG. 3B.
  • the RB allocation instruction information is represented by an RB number at the beginning of allocation and the number of consecutive RB allocations.
  • the maximum number of RB allocations is “51”, and the maximum number of RB allocation instruction information is 11 bits.
  • CP-OFDM is associated with UL resource allocation type “0”
  • DFT-S-OFDM is associated with UL resource allocation type “1”.
  • the control unit 101 of the terminal 10 selects CP-OFDM when the UL resource allocation type is “0”, and selects DFT-S-OFDM when the UL resource allocation type is “1”.
  • the terminal 10 can switch the waveform applied to the UL signal according to the instruction of the UL resource allocation type.
  • FIG. 7 is a diagram showing an example of an MCS index table for DFT-S-OFDM and an MCS index table for CP-OFDM.
  • the MCS index table for DFT-S-OFDM and the MCS index table for CP-OFDM each have 16 MCS index numbers from 0 to 15. That is, each MCS index table has a smaller number of MCS indexes than an MCS index table having 32 MCS index numbers from 0 to 31.
  • the terminal 10 when the terminal 10 (control unit 101) selects the waveform to be applied to the UL signal, the terminal 10 (control unit 101) sets the MCS index number from the MCS index table corresponding to the selected waveform. select. Thereby, the data amount (bit number) of the MCS index number can be reduced.
  • the MCS index numbers are expressed by 5 bits.
  • the MCS index number can be expressed by 4 bits. Therefore, the number of bits expressing the MCS index number can be reduced by 1 bit.
  • the terminal 10 since the waveform applied to the UL signal is known in the base station 20, the terminal 10 notifies the base station 20 of the waveform applied to the UL signal. do not have to.
  • the control unit 101 of the user terminal 10 selects an MCS index number from the MCS index table associated with the waveform applied to the UL signal.
  • the number of MCS indexes in the MCS index table associated with each waveform is smaller than the number of MCS indexes in the MCS index table for all waveforms. Thereby, the data amount of the MCS index number can be reduced.
  • any of the items described as DFT-S-OFDM in this proposal may have a Comb configuration.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
  • the radio base station 20 and the user terminal 10 may function as a computer that performs processing of the radio communication method of the present invention.
  • FIG. 8 is a diagram illustrating an example of a hardware configuration of the radio base station 20 and the user terminal 10 according to the embodiment of the present invention.
  • the wireless base station 20 and the user terminal 10 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the radio base station 20 and the user terminal 10 may be configured to include one or a plurality of the devices illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 20 and the user terminal 10 is obtained by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs computation and communication by the communication device 1004, or This is realized by controlling data reading and / or writing in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 performs computation and communication by the communication device 1004, or This is realized by controlling data reading and / or writing in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including a peripheral device interface, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the control units 101 and 201, the preprocessing units 102 and 204, the mapping unit 103, the IFFT unit 104, the post-processing units 105 and 207, the FFT unit 205, the signal detection unit 206, and the like may be realized by the processor 1001. Good.
  • the processor 1001 reads a program (program code), software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 101 of the user terminal 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks.
  • the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.
  • the storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • a network device for example, the transmission unit 106, the antennas 107 and 202, the reception unit 203, and the like described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • 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 with a single bus or may be configured with different buses between apparatuses.
  • the radio base station 20 and the user terminal 10 include a microprocessor, a digital signal processor (DSP), an application specific specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). It may be configured including hardware, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.
  • DSP digital signal processor
  • ASIC application specific specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5G
  • FRA Full Radio Access
  • W-CDMA Wideband
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB User Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 UWB (Ultra-WideBand
  • the present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.
  • the specific operation assumed to be performed by the base station (radio base station) in this specification 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 and / or other network nodes other than the base station (e.g., It is obvious that this can be performed by MME (Mobility Management Entity) or S-GW (Serving Gateway).
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Information, signals, and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • Information, signal Information, signals, etc. described herein may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • radio resource may be indicated by an index.
  • a base station can accommodate one or more (eg, three) cells (also referred to as sectors). When 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, indoor small base station RRH: Remote Radio Head) can also provide communication services.
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “gNB”, “cell”, and “sector” may be used interchangeably herein.
  • a base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), gNodeB (gNB) access point, femtocell, small cell, and the like.
  • a user terminal is a mobile station, 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 by a person skilled in the art It may also be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, UE (User Equipment), or some other appropriate terminology.
  • determining may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
  • determination and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as “determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • connection means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof.
  • the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
  • electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard.
  • RS Reference Signal
  • the DMRS may be another corresponding name, for example, a demodulation RS or DM-RS.
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • the radio frame may be composed of one or a plurality of frames in the time domain.
  • One or more frames in the time domain may be referred to as subframes, time units, etc.
  • a subframe may further be composed of one or more slots in the time domain.
  • the slot may be further configured with one or a plurality of symbols (OFDM (Orthogonal-Frequency-Division-Multiplexing) symbol, SC-FDMA (Single-Carrier-Frequency-Division-Multiple-Access) symbol, etc.) in the time domain.
  • OFDM Orthogonal-Frequency-Division-Multiplexing
  • SC-FDMA Single-Carrier-Frequency-Division-Multiple-Access
  • the radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting a signal. Radio frames, subframes, slots, minislots, and symbols may be called differently corresponding to each.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each mobile station) to each mobile station.
  • the minimum time unit of scheduling may be called TTI (Transmission Time Interval).
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot may be called a TTI
  • one minislot may be called a TTI
  • the resource unit is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. In the time domain of the resource unit, it may include one or a plurality of symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource units.
  • the resource unit may also be called a resource block (RB: Resource Block), a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, a scheduling unit, a frequency unit, or a subband. Further, the resource unit may be composed of one or a plurality of REs.
  • 1 RE may be any resource (for example, the smallest resource unit) smaller than a resource unit serving as a resource allocation unit, and is not limited to the name RE.
  • the structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, the number of minislots included in the subframe, the symbols and resource blocks included in the slots, The number and the number of subcarriers included in the resource block can be variously changed.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • One embodiment of the present invention is useful for a mobile communication system.

Landscapes

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

Abstract

L'invention concerne une unité de commande (101) d'un équipement utilisateur (10) qui sélectionne une première forme d'onde (CP-OFDM) lorsque le nombre de ressources attribuées dans le domaine fréquentiel pour un signal en liaison montante est supérieur ou égal à une valeur seuil prédéfinie ou qui sélectionne une seconde forme d'onde (DFT-S-OFDM) lorsque le nombre est inférieur à la valeur seuil prédéfinie et une unité de transmission (106) transmet un signal en liaison montante auquel est appliquée la forme d'onde sélectionnée par l'unité de commande (101). Du fait de cette configuration, la forme d'onde du signal en liaison montante peut être commutée de manière flexible.
PCT/JP2018/006831 2018-02-23 2018-02-23 Équipement utilisateur et procédé de communication radio WO2019163113A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116709542A (zh) * 2022-11-14 2023-09-05 荣耀终端有限公司 波形切换方法及电子设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009157169A1 (fr) * 2008-06-23 2009-12-30 パナソニック株式会社 Procédé de compte rendu de marge de puissance et dispositif de station mobile
WO2010090052A1 (fr) * 2009-02-03 2010-08-12 シャープ株式会社 Système de communication radio, dispositif de station de base, dispositif de station mobile, et procédé de communication
JP2011166559A (ja) * 2010-02-12 2011-08-25 Sharp Corp 基地局装置、移動局装置および集積回路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009157169A1 (fr) * 2008-06-23 2009-12-30 パナソニック株式会社 Procédé de compte rendu de marge de puissance et dispositif de station mobile
WO2010090052A1 (fr) * 2009-02-03 2010-08-12 シャープ株式会社 Système de communication radio, dispositif de station de base, dispositif de station mobile, et procédé de communication
JP2011166559A (ja) * 2010-02-12 2011-08-25 Sharp Corp 基地局装置、移動局装置および集積回路

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116709542A (zh) * 2022-11-14 2023-09-05 荣耀终端有限公司 波形切换方法及电子设备
CN116709542B (zh) * 2022-11-14 2024-05-14 荣耀终端有限公司 波形切换方法及电子设备

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