WO2021152864A1 - 端末及び基地局 - Google Patents
端末及び基地局 Download PDFInfo
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- WO2021152864A1 WO2021152864A1 PCT/JP2020/003834 JP2020003834W WO2021152864A1 WO 2021152864 A1 WO2021152864 A1 WO 2021152864A1 JP 2020003834 W JP2020003834 W JP 2020003834W WO 2021152864 A1 WO2021152864 A1 WO 2021152864A1
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- frequency band
- prach
- ghz
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- random access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0094—Indication of how sub-channels of the path are allocated
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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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
-
- 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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0092—Indication of how the channel is divided
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0026—Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to terminals and base stations in wireless communication systems.
- TSG RAN (Technical Specialization Group Radio Access Network) level study that examines various regulations (regulations), use cases, requirements, etc. regarding the extension of NR to the frequency band of 52.6 GHz or higher in Release 16. There is an item. The study of this study item was completed in December 2019, and in Release 17, the study item and work item for actually extending the specifications to 52.6 GHz or higher have been agreed.
- the frequency band of NR would be expanded from 52.6 GHz to 114.25 GHz, but in Release 17, the examination time was limited, so the examination was conducted. It is assumed that the target frequency band is limited to 52.6 GHz to 71 GHz. Further, when expanding the frequency band of NR from 52.6 GHz to 71 GHz, it is assumed that the expansion is performed based on the design of the current FR2 (Freequency Range 2) of NR.
- FR2 Freequency Range 2
- FR1 which is a low frequency band of the New Radio (NR) system
- FR2 Frequency Range 2
- the receiver that receives the setting information in the band, the format of the random access preamble, the sequence of the random access preamble, the subcarrier interval applied to the channel that transmits the random access preamble, and the uplink shared channel based on the setting information.
- a terminal is provided that comprises a control unit that sets at least one of the applicable subcarrier intervals.
- a technique that enables the terminal to appropriately make settings for transmitting a random access preamble in a high frequency band equal to or higher than the FR2 frequency band of NR.
- FIG. 3 is a diagram showing an example of the PRACH format based on the long sequence of NR of Release 15.
- FIG. 4 is a diagram showing an example of the PRACH format based on the NR short sequence of Release 15. It is a figure which shows the example of the requirement condition of OCB (occupid channel bandwidth), and the example of the requirement condition of PSD (power spectral density). It is a figure which shows the combination example of the series length, SCS of PRACH, and SCS of PUSCH applied to the PRACH format. It is a figure which shows the example of the table newly introduced for the frequency band of 52.6GHz to 71GHz.
- the wireless communication system in the following embodiment basically conforms to NR, but this is an example, and the wireless communication system in this embodiment is a wireless system other than NR in a part or all of the wireless communication system. It may be compliant with a communication system (eg LTE).
- a communication system eg LTE
- FIG. 1 shows a configuration diagram of a wireless communication system according to the present embodiment.
- the wireless communication system according to the present embodiment includes a terminal 10 and a base station 20.
- FIG. 1 shows one terminal 10 and one base station 20, this is an example, and there may be a plurality of each.
- the terminal 10 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine).
- the terminal 10 uses various communication services provided by the wireless communication system by receiving the control signal or data from the base station 20 by DL and transmitting the control signal or data to the base station 20 by UL.
- the channels transmitted from the terminal 10 include PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel).
- the terminal 10 may be referred to as a UE, and the base station 20 may be referred to as a gNB.
- the duplex system may be a TDD (Time Division Duplex) system or an FDD (Frequency Division Duplex) system.
- setting (Confix) of the radio parameter or the like may mean that a predetermined value is set in advance (Pre-confine), or from the base station 20 or the terminal 10. It may be set based on the notified radio parameter.
- the base station 20 is a communication device that provides one or more cells and performs wireless communication with the terminal 10.
- the physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
- the base station 20 transmits a synchronization signal and system information to the terminal 10. Synchronous signals are, for example, NR-PSS and NR-SSS. A part of the system information is transmitted by, for example, NR-PBCH, and is also referred to as broadcast information.
- the synchronization signal and the broadcast information may be periodically transmitted as an SS block (SS / PBCH block) composed of a predetermined number of OFDM symbols.
- the base station 20 transmits a control signal or data to the terminal 10 by DL (Downlink), and receives the control signal or data from the terminal 10 by UL (Uplink). Both the base station 20 and the terminal 10 can perform beamforming to transmit and receive signals.
- the reference signal transmitted from the base station 20 includes CSI-RS (Channel State Information Reference Signal), and the channels transmitted from the base station 20 are PDCCH (Physical Downlink Control Channel) and PDSCH (Physical Digital). including.
- Multi-numerology In order to support a wide range of frequencies and use cases in 5G, it is necessary to support multiple numerologies (radio parameters such as subcarrier spacing and symbol length). Therefore, it is effective to design variable parameters in a scalable manner with reference to LTE numerology. Based on this idea, NR's Multi-Numerology has been introduced. Specifically, the reference subcarrier interval is the same as the LTE subcarrier interval, and is set to 15 kHz. Other subcarrier intervals are defined by multiplying the reference subcarrier interval by a power of 2. A plurality of subcarrier spacing configurations ⁇ are specified.
- Cyclic prefix Normal
- Cyclic prefix Normal
- Cyclic prefix Normal or Extended
- Cyclic prefix Normal
- the number of slots included in one frame is 10, 20, 40, 80, 160, and the slots included in one subframe.
- the numbers are 1, 2, 4, 8, and 16.
- the OFDM symbol length differs for each subcarrier spacing configuration.
- the OFDM symbol lengths are (1/14) ms, (0.5 / 14) ms, (0.25 / 14) ms, ( It becomes 0.125 / 14) ms and (0.0625 / 14) ms.
- the frequency band of NR would be expanded from 52.6 GHz to 114.25 GHz, but in Release 17, the examination time is limited, and FIG. 2 As shown in, it is assumed that the frequency band to be examined is limited to 52.6 GHz to 71 GHz. Further, when expanding the frequency band of NR from 52.6 GHz to 71 GHz, it is assumed that the expansion is performed based on the design of the current FR2 (Freequency Range 2) of NR. This is because it is expected that it will take a considerable amount of time to study a new waveform.
- FR2 Freequency Range 2
- the current frequency band for NR is composed of FR1 (Frequency Range 1) corresponding to the frequency band from 410 MHz to 7.125 GHz and FR2 corresponding to the frequency band from 24.25 GHz to 52.6 GHz.
- FR1 Frequency Range 1
- FR2 Frequency Range 2
- FR2 frequency band from 24.25 GHz to 52.6 GHz
- FR2 may be separated from the new Frequency Range (FR).
- BWP Bandwidth Part
- HARQ Hybrid Automatic Repeat
- UE User Automatic
- PDSCH Physical Downlink SignalSequenceShenceShars
- CSI Channel State Information
- SSB Synchronization Signal Block
- the physical layer processing may include a channel access mechanism that assumes beam-based operation to meet regulatory requirements applicable to the unlicensed frequency band from 52.6 GHz to 71 GHz.
- 3 and 4 are diagrams for explaining the outline of PRACH (Physical Random Access Channel) of NR of Release 15.
- FIG. 3 is a diagram showing an example of the PRACH format based on the long sequence of NR of Release 15.
- the PRACH format based on the long sequence is a PRACH format for transmitting a Zadoff-Chu sequence having a sequence length of 839, and is a format similar to the PRACH format supported by LTE.
- FIG. 4 is a diagram showing an example of the PRACH format based on the short sequence of NR of release 15.
- the PRACH format based on the short sequence is a PRACH format for transmitting a Zadoff-Chu sequence having a sequence length of 139.
- the PRACH format based on the short sequence can be used, for example, when using the same subcarrier interval as the subcarrier interval applied to data such as PUSCH to use a wider bandwidth and shorter time length PRACH. Is.
- For PRACH formats based on short sequences it is possible to use 15 kHz SCS, 30 kHz SCS, 60 kHz SCS, and 120 kHz SCS, as well as the subcarrier spacing (SCS) applied to the data. Is.
- SCS subcarrier spacing
- FR1 it is possible to use a 15 kHz SCS and a 30 kHz SCS for the PRACH format based on the short sequence. Further, in FR2, it is possible to use SCS of 60 kHz and SCS of 120 kHz for the PRACH format based on the short sequence.
- preamble formats A, B, and C are defined as PRACH formats based on the short sequence.
- the preamble formats A, B, and C are mainly classified according to the presence or absence of a guard period (GP) and whether or not the length of the cyclic prefix (CP) is relatively long.
- GP guard period
- CP cyclic prefix
- indexes 0, 1, 2, 3, and 4 are defined for the preamble formats A, B, and C, which indicate the difference in time length. For example, "0" is the length of one symbol, "1" is the length of two symbols, "2" is the length of four symbols, and "3” is the length of six symbols. That is, "4" is the length of 12 symbols.
- the guard period (T_GP) is 0 for the preamble format A.
- the preamble format A for example, it is assumed that a plurality of preamble formats A are arranged side by side to fill a slot and transmitted.
- a non-zero guard period (T_GP) is defined for the preamble formats B and C. Therefore, as a use case of the preamble formats B and C, for example, it is assumed that the format is used alone.
- the preamble format B and the preamble format C have different cyclic prefix lengths (T_CP).
- the length of the cyclic prefix of the preamble format B is shorter than the length of the cyclic prefix of the preamble format C, and the maximum cell radius (Maximum Cell radius) corresponding to the preamble format B is the maximum cell radius corresponding to the preamble format C.
- the preamble format B is expected to be used in relatively small cells, and the preamble format C is expected to be used in relatively large cells.
- the preamble formats A, B, and C are classified according to the preamble use cases.
- FR2 of NR of release 15 it is possible to use only the PRACH format based on the short sequence, and it is possible to use the subcarrier interval of 60 kHz or 120 kHz for PRACH.
- the PRACH format has been extended to the NR-U (unlicensed frequency band) of Release 16.
- NR-U unlicensed frequency band
- all PRACH formats based on the release 15 NR short sequence are available.
- the Zadoff-Chu series with a series length of 1151 (for SCS at 15 kHz) and the Zadoff-Cu series with a series length of 571 (for SCS at 30 kHz) are applicable for formats A, B, and C.
- FIG. 5 is a diagram showing an example of a requirement condition of OCB (occupied channel bandwidth) and an example of a requirement condition of PSD (power spectral density).
- OCB occupied channel bandwidth
- PSD power spectral density
- the use of radio waves is regulated in each country in the unlicensed frequency band based on the upper limit of PSD (power spectrum density) in addition to the requirements of OCB.
- PSD power spectrum density
- the frequency band from 5150 MHz to 5350 MHz must be 10 dBm / MHz or less.
- the bandwidth for transmitting signals is widened, it is possible to transmit signals with a larger total power.
- the bandwidth for transmitting a signal is narrow, it is difficult to transmit the signal with a large amount of power as the total power. For this reason, the Zadoff-Chu series, which has a longer series length, has been introduced.
- the requirements for OCB are not applied, but the requirements for the upper limit of PSD are applied. Therefore, when a signal is transmitted with a narrow bandwidth, the transmission power for transmitting the signal is considered to be small. Therefore, it is assumed that it is necessary to increase the total transmission power for transmitting the signal by securing a wider bandwidth as the bandwidth for transmitting the signal.
- a new numerology including licensed and unlicensed frequency bands
- ⁇ 5
- the subcarrier interval ⁇ f 480 kHz
- information other than the subcarrier interval ⁇ f and the License prefix (for example, information on frequency) is specified. May be introduced.).
- orthogonal series having the same series length may be applied to the PRACH format, or orthogonal series having different series lengths may be applied.
- the series length applicable to the PRACH format is as follows. 1 to Alt. It may be any one of 5.
- Alt.1 In the licensed frequency band and the unlicensed frequency band, it may be possible to apply an orthogonal sequence having a sequence length of 139 to the PRACH format, and an orthogonal sequence having a sequence length of 571 to the PRACH format. And / or an orthogonal sequence having a sequence length of 1151 may be applicable.
- Alt.2 It may be possible to apply an orthogonal sequence having a sequence length of 139 to the PRACH format in the licensed frequency band, and an orthogonal sequence having a sequence length of 571 to the PRACH format in the unlicensed frequency band. It may be possible to apply a series and / or an orthogonal series with a series length of 1151. Further, in the licensed frequency band, it is possible to apply an orthogonal series having a series length of 139 to the PRACH format, and in the unlicensed frequency band, an orthogonal series having a series length of 139 to the PRACH format and a series length are It may be possible to apply at least one of the orthogonal series of 571 and the orthogonal series of series length 1151.
- Alt.4 In the licensed frequency band, it may be possible to apply an orthogonal sequence having a sequence length of 139 to the PRACH format, and in the unlicensed frequency band, a new sequence length (than 139) to the PRACH format. It may be possible to apply an orthogonal sequence (long sequence length).
- the sequence length used in the PRACH format may be determined based on numerology (eg, subcarrier spacing) or may be any of a plurality of numerology (eg, subcarrier spacing) values. , The sequence length used for the PRACH format may be determined.
- the base station 20 needs to notify the terminal 10 which sequence length is applied to transmit the PRACH. Is assumed. Therefore, a parameter indicating which candidate value can be selected from the candidate values of the new sequence length root sequence index is added to the setting information related to PRACH received from the base station 20 (for example, the information element patch-RootSequenceIndex). You may.
- FIG. 6 is a diagram showing an example of a combination of series length, PRACH SCS, and PUSCH SCS applied to the PRACH format.
- a combination of sequence length applicable to the PRACH format, PRACH SCS, and PUSCH SCS may be added in the frequency band from 52.6 GHz to 71 GHz.
- the new combination added may include a combination in which the sequence length is 139 and the SCS of PRACH and the SCS of PUSCH are the same.
- the new combination added may include a combination in which the SCS of the PRACH is wider than the SCS of the PUSCH, and a combination in which the SCS of the PUSCH is wider than the SCS of the PRACH.
- the new combination added may include only the combination in which the SCS of PUSCH and the SCS of PRACH are the same.
- L RA may indicate the length of the series
- ⁇ f RA for PRACH may indicate the subcarrier spacing of PRACH
- ⁇ f for PUSCH may indicate the subcarrier spacing of PUSCH.
- the N RA RB may indicate a value in which the number of resource blocks used for PRACH transmission is represented by the number of PUSCH resource blocks.
- k ( ⁇ ) may indicate the parameter used to generate the PRACH.
- the terminal 10 receives system information including PRACH setting information from the base station 20.
- the terminal 10 selects an orthogonal sequence applicable to the PRACH format based on the parameters specified by the information element prac-RootSequenceIndex included in the received PRACH setting information. Further, the terminal 10 sets the PRACH subcarrier interval and sets the PUSCH subcarrier interval based on the PRACH setting information included in the received system information.
- the terminal 10 applies the selected PRACH format and the PRACH subcarrier interval to transmit a random access preamble to the base station 20.
- the frequency band to which (A) new subcarrier spacing, (B) new sequence length, and (C) sequence length, combination of PRACH SCS, and PUSCH SCS can be applied may be a predetermined frequency band. ..
- Alt.A1 Applicable only in the frequency band from 52.6 GHz to 71 GHz.
- Alt.A2 Applicable in the frequency band from 24.25 GHz to 71 GHz.
- a part (or all) of the above (A), (B), and (C) is applicable in the unlicensed frequency band of the frequency band from 52.6 GHz to 71 GHz, and the above.
- a part (or all) of (A), (B), and (C) may be applicable in the licensed frequency band of the frequency band from 52.6 GHz to 71 GHz.
- a part (or all) of the above (A), (B), and (C) is applicable in the unlicensed frequency band of the frequency band from 24.25 GHz to 71 GHz, and the above.
- a part (or all) of (A), (B), and (C) may be applicable in the licensed frequency band of the frequency band from 24.25 GHz to 71 GHz.
- FIG. 12 is a diagram showing an example of a table that defines the correspondence between the PRACH configuration and the PRACH configuration index applicable to FR2.
- the formats A0, A1, A2, A3, B1, B2, B3, B4, C0, C2 may be applicable as the preamble format, and the series length of the orthogonal series is 139,511, or It may be 1151.
- Alt. C3 The above Alt. C1 and Alt. Any of C2 may be configurable by RRC signaling. That is, when the value in the "Number of PRACH slots with a 60 kHz slot" column is 2, a resource capable of actually transmitting PRACH to any of the four PRACH slots in the 60 kHz slot is provided. It may be set by the base station 20 and the setting information may be notified to the terminal 10 by RRC signaling.
- FIG. 7 is a diagram showing an example of a table newly introduced for the frequency band of 52.6 GHz to 71 GHz.
- FIG. 8 is a diagram showing an example of formats A0, A1, A2, A3, B1, B2, B3, B4, C0, and C2.
- cell size is expected to be small, so C0 and C2 corresponding to long guard periods may not be supported.
- A0, A1, A2, and A3 that do not include a guard period may not be supported because it takes time to switch the beam.
- the formats A0, A1, A2, A3, B1, B2, B3, B4, C0, C2, only B1, B2, B3, B4 may be supported.
- FIG. 9 is a diagram showing an example of a format in which a cyclic prefix is inserted for each OFDM symbol of PRACH.
- FIG. 10 is a diagram showing an example of a format in which the number of repetitions of the PRACH OFDM symbol is large.
- FIG. 11 is a diagram showing an example of a format in which the length of the cyclic prefix (or guard period) is short.
- a new value of the parameter may be introduced into the table that defines the correspondence between the PRACH configuration and the PRACH configuration index for the frequency band of 52.6 GHz to 71 GHz.
- FIG. 13 is a diagram showing an example of introducing a new value of a parameter into a table.
- 44, 49, 54, 59, 64, 69, 74, 70 may be newly added as the number of slots.
- the number of PRACH slots in the slots corresponding to the new subcarrier interval may be added, such as "Number of PRACH slots with a 120 kHz slot”.
- FIG. 7 is a diagram showing an example in which the table for FR2 is changed for the frequency band from 52.6 GHz to 71 GHz.
- SCSs of 120 kHz and 240 kHz are described, but this is an example, and may be another plurality of SCSs such as 120 kHz and 480 kHz.
- the terminal 10 receives system information including PRACH setting information from the base station 20.
- the terminal 10 sets the PRACH configuration associated with the value of the PRACH configuration index based on the value of the PRACH configuration index included in the received PRACH setting information, and transmits the random access preamble to the base station 20. ..
- the PRACH configuration associated with the value of the PRACH configuration index is described by Alt. From B1 to Alt. It may be any of B3.
- the terminal 10 applies capability information regarding the applicability of the PRACH format (for example, all (or some) PRACH formats (including sequence length and / or SCC) applicable to the frequency band from 52.6 GHz to 71 GHz). (Ability information indicating whether or not is possible) is transmitted to the base station, and the base station transmits setting information regarding PRCH (setting information as described in Proposal 1 and / or 2) based on this ability information to the terminal 10. May be sent to.
- the PRACH format for example, all (or some) PRACH formats (including sequence length and / or SCC) applicable to the frequency band from 52.6 GHz to 71 GHz.
- PRCH setting information as described in Proposal 1 and / or 2
- Alt.D1 Apply all PRACH formats (including sequence length and / or SCS) applicable to the 52.6 GHz to 71 GHz frequency band to the terminal 10 corresponding to the 52.6 GHz to 71 GHz frequency band. It may be possible to do so.
- All PRACH formats (series length and series length and) applicable to the 52.6 GHz to 71 GHz frequency band for terminals 10 that support operation in the unlicensed frequency band of the 52.6 GHz to 71 GHz frequency band. / Or including SCS) may be applicable.
- the terminal 10 that supports only the operation in the licensed frequency band of the frequency band of 52.6 GHz to 71 GHz, the operation in the unlicensed frequency band of the frequency band of 52.6 GHz to 71 GHz is supported. It may not be possible to apply the PRACH format applicable to the terminal 10 (eg, sequence length 1151 or 571).
- the terminal 10 and the base station 20 have all the functions described in the present embodiment. However, the terminal 10 and the base station 20 may have only a part of all the functions described in the present embodiment.
- the terminal 10 and the base station 20 may be collectively referred to as a communication device.
- FIG. 14 is a diagram showing an example of the functional configuration of the terminal 10. As shown in FIG. 14, the terminal 10 has a transmitting unit 110, a receiving unit 120, and a control unit 130.
- the functional configuration shown in FIG. 14 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the present embodiment can be executed.
- the transmitter 110 may be referred to as a transmitter
- the receiver 120 may be referred to as a receiver.
- the transmission unit 110 creates a transmission from the transmission data and wirelessly transmits the transmission signal. Further, the transmission unit 110 can form one or a plurality of beams.
- the receiving unit 120 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 120 includes a measuring unit that measures the received signal and acquires the received power and the like.
- the control unit 130 controls the terminal 10.
- the function of the control unit 130 related to transmission may be included in the transmission unit 110, and the function of the control unit 130 related to reception may be included in the reception unit 120.
- the receiving unit 120 of the terminal 10 receives system information including PRACH setting information from the base station 20.
- the control unit 130 of the terminal 10 selects an orthogonal sequence applicable to the PRACH format based on the parameters specified by the information element prac-RootSequenceIndex included in the received PRACH setting information. Further, the control unit 130 of the terminal 10 sets the PRACH subcarrier interval based on the PRACH setting information included in the received system information, and sets the PUSCH subcarrier interval.
- the transmission unit 110 of the terminal 10 applies the PRACH format and the PRACH subcarrier interval selected by the control unit 130 to transmit a random access preamble to the base station 20.
- the receiving unit 120 of the terminal 10 receives system information including PRACH setting information from the base station 20.
- the control unit 130 of the terminal 10 sets the PRACH configuration associated with the PRACH configuration index value based on the PRACH configuration index value included in the received PRACH setting information, and the transmission unit 110 sets a random access preamble. It is transmitted to the base station 20.
- the PRACH configuration associated with the value of the PRACH configuration index is described by Alt. From B1 to Alt. It may be any of B3.
- FIG. 15 is a diagram showing an example of the functional configuration of the base station 20.
- the base station 20 has a transmission unit 210, a reception unit 220, and a control unit 230.
- the functional configuration shown in FIG. 15 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the present embodiment can be executed.
- the transmitter 210 may be referred to as a transmitter, and the receiver 220 may be referred to as a receiver.
- the transmission unit 210 includes a function of generating a signal to be transmitted to the terminal 10 side and transmitting the signal wirelessly.
- the receiving unit 220 includes a function of receiving various signals transmitted from the terminal 10 and acquiring information of, for example, a higher layer from the received signals. Further, the receiving unit 220 includes a measuring unit that measures the received signal and acquires the received power and the like.
- the control unit 230 controls the base station 20.
- the function of the control unit 230 related to transmission may be included in the transmission unit 210, and the function of the control unit 230 related to reception may be included in the reception unit 220.
- the control unit 230 of the base station 20 includes a parameter for designating an orthogonal series candidate applicable to the PRACH format in the information element patch-RootSequenceIndex, such as System information including the PRACH setting information of the above is transmitted to the terminal 10.
- the receiving unit 220 of the base station 20 applies the PRACH subcarrier interval and the PUSCH subcarrier interval specified by the control unit 230 in the PRACH setting information to receive the random access preamble transmitted from the terminal 10.
- the control unit 230 selects the PRACH configuration that is actually set for the terminal 10 from a plurality of PRACH configurations that can be set for the terminal 10 in the frequency band of 52.6 GHz to 71 GHz, and the transmission unit 230.
- the 210 transmits system information including PRACH setting information such as a PRACH configuration index value corresponding to the PRACH configuration selected by the control unit 230 to the terminal 10.
- the receiving unit 220 of the base station 20 receives the random access preamble transmitted from the terminal 10 based on the PRACH configuration selected by the control unit 230.
- each functional block may be realized by one device in which a plurality of elements are physically and / or logically combined, or two or more devices that are physically and / or logically separated may be directly and / or logically separated. / Or indirectly (for example, wired and / or wireless) connection may be realized by these plurality of devices.
- FIG. 16 is a diagram showing an example of the hardware configuration of the terminal 10 and the base station 20 according to the present embodiment.
- the terminal 10 and the base station 20 described above may each be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the terminal 10 and the base station 20 may be configured to include one or more of the devices shown in 1001 to 1006 shown in the figure, or may be configured not to include some of the devices. May be good.
- the processor 1001 For each function of the terminal 10 and the base station 20, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an calculation, and the communication device 1004 communicates with the memory 1002 and the memory 1002. It is realized by controlling the reading and / or writing of data in the storage 1003.
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the transmission unit 110, the reception unit 120, and the control unit 130 of the terminal 10 shown in FIG. 14 may be realized by a control program stored in the memory 1002 and operated by the processor 1001.
- the transmission unit 210, the reception unit 220, and the control unit 230 of the base station 20 shown in FIG. 15 may be realized by a control program stored in the memory 1002 and operated by the processor 1001.
- the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
- Processor 1001 may be mounted on one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the memory 1002 is a computer-readable recording medium, and is, for example, a ROM (Read Only Memory), an EPROM (Erasable Program ROM), an EPROM (Electrically Erasable Program ROM), a RAM (Random Access Memory), or a RAM (Random Access). May be done.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to perform the process according to the embodiment of the present invention.
- the storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, 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 containing memory 1002 and / or storage 1003.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the transmission unit 110 and the reception unit 120 of the terminal 10 may be realized by the communication device 1004.
- the transmitting unit 210 and the receiving unit 220 of the base station 20 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 receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- Bus 1007 may be composed of a single bus, or may be composed of different buses between devices.
- terminal 10 and the base station 20 are a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device) hardware, an FPGA, and an FPGA, respectively. It may be configured to include hardware, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented on at least one of these hardware.
- a receiver that receives setting information in a high frequency band equal to or higher than the frequency band of FR2 among the Frequency Range 1 (FR1), which is a low frequency band of the New Radio (NR) system, and the Frequency Range 2 (FR2), which is a high frequency band.
- FR1 Frequency Range 1
- FR2 Frequency Range 2
- a terminal including a control unit for setting at least one.
- the terminal can make settings related to the transmission of the random access preamble applicable to the high frequency band higher than the frequency band of FR2.
- the series length of the random access preamble series may be equal to or longer than the series length of the random access preamble series that can be used in the unlicensed frequency band of FR2.
- the transmission output of the terminal is regulated based on the upper limit of PSD (power spectrum density) in the unlicensed frequency band in the high frequency band higher than the frequency band of FR2.
- PSD power spectrum density
- the subcarrier interval applied to the channel transmitting the random access preamble may be the same as the subcarrier interval applied to the uplink shared channel.
- the terminal can set the subcarrier interval applied to the channel for transmitting the random access preamble and the subcarrier interval applied when transmitting the data to be the same subcarrier interval. ..
- the subcarrier interval applied to the channel transmitting the random access preamble may be different from the subcarrier interval applied to the uplink shared channel.
- the terminal can set the subcarrier interval applied to the channel for transmitting the random access preamble to a subcarrier interval different from the subcarrier interval applied when transmitting data.
- the Frequency Range 1 which is the low frequency band of the New Radio (NR) system
- the Frequency Range 2 which is the high frequency band
- the frequency band that is higher than the frequency band of the FR2 can be set for the terminal.
- Random access preamble format the sequence of the random access preamble, the subcarrier interval applied to the channel transmitting the random access preamble, and the subcarrier interval applied to the uplink shared channel, the setting information including at least one of them.
- a base station including a control unit for setting the frequency and a transmission unit for transmitting the setting information to the terminal.
- the base station can transmit to the terminal information regarding the setting of the random access preamble applicable to the terminal in the high frequency band equal to or higher than the frequency band of FR2.
- the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the terminal 10 and the base station 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
- the software operated by the processor of the terminal 10 according to the embodiment of the present invention and the software operated by the processor of the base station 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- information notification includes physical layer signaling (for example, DCI (Broadcast Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access) Signaling). Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof may be used.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRC Signaling Setup) message, an RRC connection reconfiguration (RRC Signaling Configuration) message, or the like.
- Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered Trademarks), GSM (Registered Trademarks), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), LTE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), It may be applied to Bluetooth®, other systems that utilize suitable systems and / or next-generation systems that are extended based on them.
- the specific operation performed by the base station 20 in the present specification may be performed by its upper node (upper node).
- various operations performed for communication with the terminal 10 are performed on a network other than the base station 20 and / or the base station 20. It is clear that it can be done by a node (eg, MME or S-GW, but not limited to these).
- a node eg, MME or S-GW, but not limited to these.
- MME Mobility Management Entity
- the terminal 10 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, or a wireless device. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- Base station 20 may also be referred to by one of ordinary skill in the art by NB (NodeB), eNB (enhanced NodeB), base station (Base Station), gNB, or some other suitable term.
- NB NodeB
- eNB enhanced NodeB
- Base Station Base Station
- gNB Base Station
- the bandwidth portion (BWP: Bandwidth Part) (which may also be referred to as partial bandwidth) may represent a subset of consecutive common RBs (common resources blocks) for a certain neurology in a carrier. good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the radio frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transmission / reception.
- SCS SubCarrier Spacing
- TTI Transmission Time Interval
- the slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Slots may be unit of time based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. A minislot may consist of a smaller number of symbols than the slot.
- PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as the PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- one subframe may be referred to as a transmission time interval (TTI)
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- At least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the time interval for example, the number of symbols
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the time domain of the RB may also include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs include a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
- the resource block may be composed of one or a plurality of resource elements (RE: Resource Elements).
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- determining and “determining” used herein may include a wide variety of actions.
- “Judgment” and “decision” include, for example, judgment, calculation, computing, processing, deriving, investigating, searching (for example, table). , Searching in a database or another data structure), ascertaining can be regarded as “judgment” or “decision”.
- "judgment” and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Acquiring) (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
- judgment and “decision” are considered to be “judgment” and “decision” when the things such as solving, selecting, selecting, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”.
- Terminal 110 Transmitter 120 Receiver 130 Control 20
- Base station 210 Transmitter 220 Receiver 230
- Control 1001 Processor 1002 Memory
- Storage 1004 Communication device
- Input device 1006 Output device
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Abstract
Description
図1に本実施の形態に係る無線通信システムの構成図を示す。本実施の形態に係る無線通信システムは、図1に示すように、端末10、及び基地局20を含む。図1には、端末10、及び基地局20が1つずつ示されているが、これは例であり、それぞれ複数であってもよい。
5Gにおける幅広い周波数やユースケースをサポートするためには、複数のNumerology(サブキャリア間隔やシンボル長等の無線パラメータ)をサポートする必要がある。このため、LTEのNumerologyを基準として、スケーラブルに可変パラメータを設計することが有効である。この考え方の下で、NRのMulti-Numerologyが導入されている。具体的には、基準サブキャリア間隔は、LTEのサブキャリア間隔と同じで、15kHzとされている。基準サブキャリア間隔に2のべき乗を乗算することで、その他のサブキャリア間隔が規定されている。複数サブキャリア間隔構成(subcarrier spacing configuration)μが規定されている。具体的には、μ=0に対して、サブキャリア間隔Δf=15kHz、Cyclic prefix=Normal、μ=1に対して、サブキャリア間隔Δf=30kHz、Cyclic prefix=Normal、μ=2に対して、サブキャリア間隔Δf=60kHz、Cyclic prefix=Normal又はExtended、μ=3に対して、サブキャリア間隔Δf=120kHz、Cyclic prefix=Normal、μ=4に対して、サブキャリア間隔Δf=240kHz、Cyclic prefix=Normalが指定されてもよい。
3GPP(Third Generation Partnership Project)のリリース15のNR(New Radio)及びリリース16のNRでは、上限が52.6GHzまでの周波数帯を対象としている。52.6GHz以上の周波数帯にNRを拡張することについて、リリース16で、各種規制(regulation)、ユースケース、要求条件(requirement)等を検討するTSG RAN(Technical Specification Group Radio Access Network)レベルのstudy itemが存在する。このstudy itemの検討は、2019年12月に完了しており、リリース17で、仕様を実際に52.6GHz以上に拡張するためのstudy item及びwork itemが合意されている。
(RAN1:物理レイヤの特徴)
52.6GHzから71GHzまでの周波数帯で端末10及び基地局20が動作するための新しい1又は複数のニューメロロジー。Study Item(SI)で特定される物理信号/チャネルへの影響がある場合には、その影響に対処する。
52.6GHzから71GHzの周波数帯域において、SSB及びデータに対して、新しいサブキャリア間隔が導入されることが想定されている。この場合において、PRACHに対して使用可能なサブキャリア間隔がどのようになるか、現時点では不明である。例えば、ショートシーケンスに基づくPRACHフォーマットについては、データに適用されるサブキャリア間隔と同じサブキャリア間隔が適用されてもよいと考えられる。
52.6GHzから71GHzの周波数帯域(ライセンス周波数帯及びアンライセンス周波数帯を含む)において、PRACHフォーマットのうち、少なくともプリアンブルフォーマットA、B、及びCのうちのいずれかに対して、新しいニューメロロジー(例えば、μ=5に対して、サブキャリア間隔Δf=480kHz、Cyclic prefix=Normal又はExtendedが指定されるものであってもよい。または、既存のμ=4に対応するCyclic prefixとして、Normalに加えて更にExtendedが指定されるものであってもよい。なお、それぞれのμの値に対して、サブキャリア間隔ΔfやCyclic prefix以外の情報(例えば、周波数に関する情報)が規定されるものであってもよい。)が導入されてもよい。例えば、直交系列(例えば、Zadoff-Chu系列)の系列長が139であるプリアンブルフォーマットA、B、及び/又はCに対して、240kHzのSCS、及び/又は480kHzのSCSが適用可能とされてもよい。
例えば、52.6GHzから71GHzの周波数帯において、初期アクセス時に、端末10は、基地局20から、PRACHの設定情報を含むシステム情報を受信する。端末10は、受信したPRACHの設定情報に含まれる情報要素prach-RootSequenceIndexで指定されるパラメータに基づいて、PRACHのフォーマットに適用可能な直交系列を選択する。また、端末10は、受信したシステム情報に含まれるPRACHの設定情報に基づき、PRACHのサブキャリア間隔を設定し、PUSCHのサブキャリア間隔を設定する。端末10は、選択したPRACHフォーマット及びPRACHのサブキャリア間隔を適用して、ランダムアクセスプリアンブルを基地局20に対して送信する。
(A)新しいサブキャリア間隔、(B)新しい系列長、及び(C)系列長、PRACHのSCS、及びPUSCHのSCSの組み合わせ、を適用可能な周波数帯は、所定の周波数帯であってもよい。例えば、以下のAlt.A1からAlt.A4のうちのいずれかであってもよい。
例えば、52.6GHzから71GHzの周波数帯において、初期アクセス時に、端末10は、基地局20から、PRACHの設定情報を含むシステム情報を受信する。端末10は、受信したPRACHの設定情報に含まれるPRACH configuration indexの値に基づき、当該PRACH configuration indexの値に対応付けられるPRACH configurationを設定して、ランダムアクセスプリアンブルを基地局20に対して送信する。ここで、PRACH configuration indexの値に対応付けられるPRACH configurationは、Alt.B1からAlt.B3のうちのいずれかであってもよい。
端末10は、PRACHフォーマットの適用可否に関する能力情報(例えば、52.6GHzから71GHzの周波数帯に適用可能な全て(又は一部)のPRACHフォーマット(系列長及び/又はSCCを含む)を適用することが可能であるか否かを示す能力情報)を基地局に送信し、基地局はこの能力情報に基づいてPRCHに関する設定情報(Proposal 1及び/又は2に記載したような設定情報)を端末10に送信してもよい。
次に、これまでに説明した処理動作を実行する端末10及び基地局20の機能構成例を説明する。端末10及び基地局20は、本実施の形態で説明した全ての機能を備えている。ただし、端末10及び基地局20は、本実施の形態で説明した全ての機能のうちの一部のみの機能を備えてもよい。なお、端末10及び基地局20を総称して通信装置と称してもよい。
図14は、端末10の機能構成の一例を示す図である。図14に示されるように、端末10は、送信部110と、受信部120と、制御部130を有する。図14に示される機能構成は一例に過ぎない。本実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。なお、送信部110を送信機と称し、受信部120を受信機と称してもよい。
図15は、基地局20の機能構成の一例を示す図である。図15に示されるように、基地局20は、送信部210と、受信部220と、制御部230を有する。図15に示される機能構成は一例に過ぎない。本実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。なお、送信部210を送信機と称し、受信部220を受信機と称してもよい。
上記実施の形態の説明に用いたブロック図(図14~図15)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及び/又はソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に複数要素が結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
本明細書には、少なくとも以下の端末及び基地局が開示されている。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、端末10と基地局20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って端末10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って基地局20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 制御部
20 基地局
210 送信部
220 受信部
230 制御部
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
Claims (5)
- New Radio(NR)システムの低い周波数帯域であるFrequency Range1(FR1)及び高い周波数帯域であるFrequency Range 2(FR2)のうち、前記FR2の周波数帯域以上の高周波数帯域における設定情報を受信する受信部と、
前記設定情報に基づき、ランダムアクセスプリアンブルのフォーマット、前記ランダムアクセスプリアンブルの系列、前記ランダムアクセスプリアンブルを送信するチャネルに適用するサブキャリア間隔、及び上り共有チャネルに適用するサブキャリア間隔、のうちの少なくとも1つを設定する制御部と、
を備える端末。 - 前記ランダムアクセスプリアンブルの系列の系列長は、前記FR2のアンライセンス周波数帯で使用可能なランダムアクセスプリアンブルの系列の系列長以上である、
請求項1に記載の端末。 - 前記ランダムアクセスプリアンブルを送信するチャネルに適用するサブキャリア間隔と、前記上り共有チャネルに適用するサブキャリア間隔とは同じである、
請求項1に記載の端末。 - 前記ランダムアクセスプリアンブルを送信するチャネルに適用するサブキャリア間隔は、前記上り共有チャネルに適用するサブキャリア間隔とは異なる、
請求項1に記載の端末。 - New Radio(NR)システムの低い周波数帯域であるFrequency Range1(FR1)及び高い周波数帯域であるFrequency Range 2(FR2)のうち、前記FR2の周波数帯域以上の高周波数帯域において、端末に対して設定可能なランダムアクセスプリアンブルのフォーマット、前記ランダムアクセスプリアンブルの系列、前記ランダムアクセスプリアンブルを送信するチャネルに適用するサブキャリア間隔、及び上り共有チャネルに適用するサブキャリア間隔、のうちの少なくとも1つを含む設定情報を設定する制御部と、
前記設定情報を前記端末に送信する送信部と、
を備える基地局。
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| JP2021574434A JPWO2021152864A5 (ja) | 2020-01-31 | 端末、基地局、通信方法、及び無線通信システム | |
| PCT/JP2020/003834 WO2021152864A1 (ja) | 2020-01-31 | 2020-01-31 | 端末及び基地局 |
| CN202080093807.8A CN115039495B (zh) | 2020-01-31 | 2020-01-31 | 终端和基站 |
| EP20916809.5A EP4099744A4 (en) | 2020-01-31 | 2020-01-31 | Terminal and base station |
| US17/759,144 US12526119B2 (en) | 2020-01-31 | 2020-01-31 | Terminal and base station |
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| EP (1) | EP4099744A4 (ja) |
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| WO2018084208A1 (ja) * | 2016-11-02 | 2018-05-11 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
| WO2018131891A1 (en) * | 2017-01-13 | 2018-07-19 | Samsung Electronics Co., Ltd. | Method and apparatus for configuring random access resources and method and apparatus for random access |
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| EP4258738B1 (en) * | 2017-05-02 | 2025-03-26 | Ntt Docomo, Inc. | Terminal, preamble transmission method, base station, and radio communication system |
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| Publication number | Publication date |
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| EP4099744A1 (en) | 2022-12-07 |
| CN115039495B (zh) | 2025-11-18 |
| EP4099744A4 (en) | 2023-10-18 |
| CN115039495A (zh) | 2022-09-09 |
| JPWO2021152864A1 (ja) | 2021-08-05 |
| US20220408489A1 (en) | 2022-12-22 |
| US12526119B2 (en) | 2026-01-13 |
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