WO2019215921A1 - ユーザ端末及び無線通信方法 - Google Patents
ユーザ端末及び無線通信方法 Download PDFInfo
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Definitions
- the present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.
- LTE Long Term Evolution
- Non-patent Document 1 LTE Advanced, LTE Rel. 10, 11, 12, 13
- LTE Rel. 8, 9 LTE Advanced, LTE Rel. 10, 11, 12, 13
- LTE successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel.
- a user terminal (UE: User Equipment) is synchronized with a synchronization signal (PSS (Primary Synchronization Signal) by an initial access procedure (also called a cell search or the like). And / or SSS (Secondary Synchronization Signal) is detected and synchronized with a network (for example, a radio base station (eNB (eNode B))) and connected cells are identified (for example, a cell ID (Identifier)). Identified by).
- PSS Primary Synchronization Signal
- a network for example, a radio base station (eNB (eNode B)
- eNB radio base station
- connected cells for example, a cell ID (Identifier)). Identified by).
- the UE transmits a master information block (MIB) transmitted on a broadcast channel (PBCH: Physical Broadcast Channel) and a downlink (DL) shared channel (PDSCH: Physical Downlink Shared Channel).
- MIB Master information block
- PBCH Physical Broadcast Channel
- PDSCH Physical Downlink Shared Channel
- SIB System Information Block
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- a resource unit including a synchronization signal and a broadcast channel is defined as a synchronization signal block and an initial connection is performed based on the SS block.
- the synchronization signal is also referred to as PSS and / or SSS, or NR-PSS and / or NR-SSS.
- the broadcast channel is also called PBCH or NR-PBCH.
- the synchronization signal block is also called an SS block (Synchronization Signal block: SSB) or an SS / PBCH block.
- the UE searches for a sync raster arranged at a predetermined frequency position in the initial access.
- the frequency position of the SS / PBCH block in the carrier is arranged at a position other than the center, so that it is difficult to narrow down search candidate positions.
- a user terminal includes: a reception unit that receives a synchronization signal block including a first information element related to a subcarrier offset and a second information element related to a downlink control channel for system information; When a predetermined code point is specified in the information element, the system recognizes that there is no control resource set for system information corresponding to the synchronization signal block, and based on the code point included in the second information element And a control unit that determines the type of information to be notified.
- notification control regarding the synchronous raster position can be appropriately performed.
- FIG. 3A and 3B are examples of a table in which an RMSI-PDCCH-Config corresponding to k ssb and an offset are defined. It is a figure which shows an example in the case of notifying the range of the synchronous raster which is not detected by SS / PBCH block.
- 5A and 5B are other examples of a table in which an RMSI-PDCCH-Config corresponding to k ssb and an offset are defined.
- synchronization signals also referred to as SS, PSS and / or SSS, or NR-PSS and / or NR-SSS, etc.
- broadcast It has been studied to define a signal block (also referred to as SS block, SS / PBCH block or the like) including a channel (also referred to as a broadcast signal, PBCH, or NR-PBCH).
- a set of one or more signal blocks is also called a signal burst (SS / PBCH burst or SS burst).
- a plurality of signal blocks in the signal burst are transmitted with different beams at different times (also referred to as beam sweep).
- a predetermined frequency position is searched (or monitored) to obtain an SS / PBCH block.
- a plurality of synchronization rasters also called sync rasters or SS (Synchronization Signal) rasters
- SS Synchronization Signal
- a plurality of values are set at 0-2.65 GHz, 2.4-24.25 GHz, and 24.25-100 GHz.
- 8832 are set for 0-2.65 GHz
- 15174 are set for 2.4-24.25 GHz
- 4384 are set for 24.25-100 GHz.
- MIB Master Information Block
- MSI Minimum System Information
- RMSI Remaining Minimum System Information
- SIB System Information Block 1 and SIB 2 in LTE.
- the RMSI is scheduled by the PDCCH specified by the MIB.
- MIB contents include SystemFrameNumber (6 MSBs of SystemFrameNumber), subCarrierSpacingCommon, Ssb-subcarrierOffset, Dmrs-TypeA-Position, pdcchConfigSIB1, cellBarred, intraFreqReselection, spare, 4 LSBs of SystemFrameNumber, Sslf-Index Includes frame-index etc.
- the contents of the MIB contents are not limited to this.
- the first frequency band may be a frequency band (sub-6) lower than 6 GHz
- the second frequency band may be a frequency band (above-6) higher than 6 GHz.
- the first frequency band may be referred to as FR (Frequency Range) 1.
- the second frequency band may be a frequency band higher than 24 GHz, and may be referred to as FR2, above-24, millimeter wave, or the like.
- SystemFrameNumber notifies the upper 6 bits of the system frame number (SFN).
- subCarrierSpacingCommon notifies subcarrier spacing (SCS, pneumatics) for RMSI reception.
- Ssb-subcarrierOffset notifies a PRB (Physical Resource Block) grid offset for RMSI reception.
- Dmrs-TypeA-Position notifies whether the DMSCH symbol position for PDSCH is the third symbol or the fourth symbol in the slot.
- pdcchConfigSIB1 (which may be referred to as RMSI-PDCCH-Config) notifies a PDCCH (or CORESET (Control Resource Set) including PDCCH, RMSI CORESET) parameter set (PDCCH parameter set) for RMSI reception.
- cellBarred notifies whether or not this cell is camp-on (located in the area) (Barred / notBarred).
- intraFreqReselection notifies whether or not there is a cell that can camp on within the same frequency (carrier band) (allowed / not allowed).
- the spare is a spare bit and may be used for a specific purpose. 4 LSBs of SystemFrameNumber notifies the lower 4 bits of SFN.
- Ssb-IndexExplicit notifies the upper 3 bits of the SSB index.
- one bit of Ssb-IndexExplicit is used together with Ssb-subcarrierOffset.
- the maximum number of SSB indexes is 64, 6 bits may be required. In above-6, the number of SSB indexes may be more than eight, and in sub-6, the number of SSB indexes may not be more than eight. In sub-6, one specific bit of Ssb-IndexExplicit is used together with 4 bits of Ssb-subcarrierOffset to make Ssb-subcarrierOffset 5 bits. The lower 3 bits may be implicitly notified using DMRS for PBCH.
- the Half-frame-index notifies whether this SSB is the first half of the radio frame (10 ms) or the latter half of the 5 ms half frame.
- CRC is a cyclic redundancy check code generated based on the above information.
- Ssb-subcarrierOffset represents the offset between the PRB (PRB for data) based on the center frequency of the carrier and the PRB of the SSB by the number of subcarriers. For example, when the subcarrier spacing of SSB and RMSI is the same, 1 PRB is 12 subcarriers, so Ssb-subcarrierOffset uses 12 code points (value of 0-11) out of 4 bits.
- bits and / or code points may remain.
- a code point is a value represented by a bit.
- one bit of the information element (Ssb-IndexExplicit) corresponding to the SS / PBCH block index is used together with the information element (Ssb-subcarrierOffset) corresponding to the SS / PBCH subcarrier offset.
- the remaining 2 bits are left.
- Ssb-subcarrierOffset uses up to 12 code points (values from 0 to 11) out of 16 code points of 4 bits, so at least 4 code points are not used.
- Ssb-subcarrierOffset uses up to 24 code points (values from 0 to 23) out of 32 code points of 5 bits, including 1 bit of Ssb-IndexExplicit, so at least 8 code points are used. I will not.
- a cell-specific reference signal (CRS) is transmitted in each subframe, and the synchronization signal is always fixedly arranged at the center of the carrier. Therefore, the UE can narrow down the frequency position where the SS search should be performed to some extent by referring to the spectrum of received power even when data traffic does not occur (see FIG. 1).
- the search candidate position narrowing used in the existing LTE system cannot be applied, and compared with the existing LTE system. This may make it difficult to narrow down search candidate positions.
- a plurality of synchronous rasters are examined one by one at the time of initial access.
- the UE detects an accessible SS / PBCH block by sequentially searching a plurality of SS rasters predefined in the specification, and performs random access based on the RMSI associated with the SS / PBCH block. Can do.
- MIB content information element of PBCH included in the SS / PBCH block.
- the UE searches for SS / PBCH blocks on the synchronous raster during initial access.
- the UE needs to read an RMSI (or SIB) that contains information about the random access channel (RACH) in order to perform initial access. Therefore, in the stand-alone (SA) NR cell, the RMSI associated therewith is transmitted to the SSB for initial access.
- RMSI or SIB
- SA stand-alone
- SS / PBCH blocks that are not used for the initial access for example, the SS / PBCH block that is used only for the secondary cell (SCell) (for example, the NR cell for non-standalone (NSA), the cell for NSA)
- SCell secondary cell
- NSA non-standalone
- cellBarred is Barred, and intraFreqReselection is not allowed if all cells in the carrier are NSA cells.
- Information elements used for RMSI reception include, for example, information elements used for PDCCH configuration notification (pdcchConfigSIB1), information elements used for PRB grid offset notification for RMSI reception (Ssb-subcarrierOffset), etc. There is.
- information for notifying the presence / absence of the corresponding RMSI is defined for an unused code point of a predetermined information element (for example, Ssb-subcarrierOffset) included in the PBCH.
- a predetermined information element for example, Ssb-subcarrierOffset
- the bit (for example, 8 bits) of the information element (pdcchConfigSIB1) used for notification of the PDCCH configuration for RMSI reception is It can be used for other purposes.
- the UE notifies the information about the synchronous raster to be searched next by using the pdcchConfigSIB1 (RMSI-PDCCH-Config).
- information on the synchronous raster to be searched next for example, SS for PCell
- SS / PBCH block for example, SS / PBCH block for SCell
- / PBCH block is notified to the UE (see FIG. 2).
- the UE determines an unused code point of Ssb-subcarrierOffset and a synchronization raster to be searched next using pdcchConfigSIB1.
- the UE determines that there is no control resource set for the predetermined search space, and performs a synchronous raster search based on the offset set corresponding to each k ssb (see FIG. 3A).
- the UE determines that there is no control resource set for the predetermined search space, and performs a synchronous raster search based on the offset set corresponding to each k ssb (see FIG. 3B).
- the end of the synchronous raster range that does not require a search may be determined.
- the UE determines either the synchronous raster position (GSCN) to be searched next or the synchronous raster range that does not need to be searched based on the notified k ssb .
- GSCN synchronous raster position
- k ssb 14
- the first information element is an information element related to a subcarrier offset (for example, Ssb-subcarrierOffset), and the second information element is an information element related to a downlink control channel for system information (for example, RMSI-PDCCH).
- a subcarrier offset for example, Ssb-subcarrierOffset
- the second information element is an information element related to a downlink control channel for system information (for example, RMSI-PDCCH).
- -Config or pdcchConfigSIB1 will be described as an example.
- the first information element and the second information element are not limited to this.
- Other information elements included in the synchronization signal block (which may be called SS block or SS / PBCH block) may be used.
- Ssb-subcarrierOffset the first information element
- the UE When the specific code point is specified in the second information element (hereinafter also referred to as RMSI-PDCCH-Config), the UE recognizes that there is no CORESET for RMSI corresponding to the detected SS block. Further, the UE may recognize that information regarding a synchronous raster position to be searched next and a synchronous raster range that does not need to be searched is not included.
- the specific code point in the second information element may be “00000000” (in the case of 8 bits), for example.
- the code point other than the specific code point in the second information element may be, for example, “00000001 to 11111111” (in the case of 8 bits).
- the second information may be content different from the first information, or may be information specifying a range that does not overlap with the range specified by the first information.
- a range that does not overlap with the range of the offset for example, N offset GSCN ) notified by the first information may be defined.
- the second information is used to notify at least one of an offset value larger than 769 and an offset value smaller than ⁇ 769 in FR1, and in FR2 at least one of an offset value larger than 256 and an offset value smaller than ⁇ 256. You may be notified. Thereby, a wider range can be designated to the UE as the search position of the synchronous raster.
- information other than information related to the synchronous raster position to be searched next may be notified using the second information.
- the UE when the UE detects an SS block in which k ssb is a predetermined value (for example, FR1 is 30, FR2 is 14) and RMSI-PDCCH-Config is 0, in the cell corresponding to the detected SS block, It may be determined that there is no next SS block having a control resource set for the type 0-PDCCH common search space.
- k ssb is a predetermined value
- FR2 for example, FR2 is 14
- RMSI-PDCCH-Config 0
- a type 0-PDCCH common search is performed for the detected SS block. It may be determined that there is no information regarding the next SS block having a control resource set for space.
- the SS block (for example, the non-standalone SS block) can be prevented from performing notification regarding the synchronous raster, and other information can be used using the bits in the SS block (for example, PBCH). Can be notified.
- PBCH for example, MIB
- effective information can be notified using MIB by effectively using 8 bits of RMSI-PDCCH-Config. .
- the value of GSCN may be defined, and other code points may be reserved (see FIG. 5).
- the offset corresponding to for example, 1 to 255) is reserved. This makes it possible to flexibly notify other information using reserved bits as necessary in the future.
- the predetermined code point corresponds to a code point used for notification of a synchronous raster range that does not require a search.
- the UE When the specific code point is specified in the second information element (hereinafter also referred to as RMSI-PDCCH-Config), the UE recognizes that there is no CORESET for RMSI corresponding to the detected SS block. Further, the UE may recognize that information regarding a synchronous raster position to be searched next and a synchronous raster range that does not need to be searched is not included.
- the specific code point in the second information element may be “00000000” (in the case of 8 bits), for example.
- the UE when a code point other than a specific code point is specified in the second information element (hereinafter also referred to as RMSI-PDCCH-Config), the UE has a CORESET for RMSI corresponding to the detected SS block. Recognize not. Further, the UE may determine a synchronous raster range that does not require a search based on a designated code point.
- RMSI-PDCCH-Config the second information element
- intra-frequency reselection intra-frequency reselection
- PBCH for example, MIB
- MIB intra-frequency reselection
- the UE gives priority to any notification (for example, notification of MIB) and sends other notifications. You may control so that it may be ignored. Thereby, even if the notification contents are different, communication can be continued properly.
- wireless communication system Wireless communication system
- communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present invention.
- FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
- DC dual connectivity
- the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced 4G (4th generation mobile communication system), 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
- the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. It is equipped with. Moreover, the user terminal 20 is arrange
- the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 at the same time using CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
- CC cells
- Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
- a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- the same carrier may be used.
- the configuration of the frequency band used by each radio base station is not limited to this.
- the user terminal 20 can perform communication using time division duplex (TDD) and / or frequency division duplex (FDD) in each cell.
- TDD time division duplex
- FDD frequency division duplex
- a single neurology may be applied, or a plurality of different neurology may be applied.
- the wireless base station 11 and the wireless base station 12 are connected by wire (for example, optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly. May be.
- the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
- RNC radio network controller
- MME mobility management entity
- Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
- Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
- orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
- SC-FDMA single carrier-frequency division multiple access
- Frequency Division Multiple Access and / or OFDMA is applied.
- OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
- SC-FDMA is a single carrier transmission in which the system bandwidth is divided into bands each composed of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between terminals. It is a method.
- the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
- downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Moreover, MIB (Master Information Block) is transmitted by PBCH.
- PDSCH downlink shared channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- MIB Master Information Block
- Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
- Downlink control information (DCI: Downlink Control Information) including PDSCH and / or PUSCH scheduling information is transmitted by the PDCCH.
- scheduling information may be notified by DCI.
- DCI for scheduling DL data reception may be referred to as DL assignment
- DCI for scheduling UL data transmission may be referred to as UL grant.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) delivery confirmation information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
- HARQ Hybrid Automatic Repeat reQuest
- EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
- an uplink shared channel (PUSCH) shared by each user terminal 20
- an uplink control channel (PUCCH: Physical Uplink Control Channel)
- a random access channel (PRACH: Physical Random Access Channel)
- User data, higher layer control information, etc. are transmitted by PUSCH.
- downlink radio quality information CQI: Channel Quality Indicator
- delivery confirmation information SR
- scheduling request etc.
- a random access preamble for establishing connection with the cell is transmitted by the PRACH.
- a cell-specific reference signal CRS
- CSI-RS channel state information reference signal
- DMRS demodulation reference signal
- PRS Positioning Reference Signal
- a measurement reference signal SRS: Sounding Reference Signal
- a demodulation reference signal DMRS
- the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
- FIG. 7 is a diagram illustrating an example of an overall configuration of a radio base station according to an embodiment of the present invention.
- the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
- the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
- User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access
- Retransmission control for example, HARQ transmission processing
- scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
- IFFT Inverse Fast Fourier Transform
- precoding processing precoding processing, and other transmission processing
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
- the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device which is described based on common recognition in the technical field according to the present invention.
- the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
- the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
- the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
- the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
- the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
- CPRI Common Public Radio Interface
- X2 interface May be.
- the transmission / reception unit 103 includes a first information element (for example, Ssb-subcarrierOffset) regarding the subcarrier offset and a second information element (for example, RMSI-PDCCH-Config or pdcchConfigSIB1) regarding the downlink control channel for system information.
- a first information element for example, Ssb-subcarrierOffset
- a second information element for example, RMSI-PDCCH-Config or pdcchConfigSIB1 regarding the downlink control channel for system information.
- FIG. 8 is a diagram illustrating an example of a functional configuration of the radio base station according to the embodiment of the present invention.
- the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.
- the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. These configurations may be included in the radio base station 10, and a part or all of the configurations may not be included in the baseband signal processing unit 104.
- the control unit (scheduler) 301 controls the entire radio base station 10.
- the control part 301 can be comprised from the controller, the control circuit, or control apparatus demonstrated based on the common recognition in the technical field which concerns on this invention.
- the control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal allocation in the mapping unit 303, and the like.
- the control unit 301 also controls signal reception processing in the reception signal processing unit 304, signal measurement in the measurement unit 305, and the like.
- the control unit 301 schedules system information, downlink data signals (for example, signals transmitted by PDSCH), downlink control signals (for example, signals transmitted by PDCCH and / or EPDCCH, delivery confirmation information, etc.) (for example, resource Control).
- the control unit 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is necessary for the uplink data signal.
- the control unit 301 controls scheduling of synchronization signals (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), downlink reference signals (for example, CRS, CSI-RS, DMRS) and the like.
- control unit 301 includes an uplink data signal (for example, a signal transmitted on PUSCH), an uplink control signal (for example, a signal transmitted on PUCCH and / or PUSCH, delivery confirmation information, etc.), a random access preamble (for example, Scheduling of the uplink reference signal and the like.
- uplink data signal for example, a signal transmitted on PUSCH
- uplink control signal for example, a signal transmitted on PUCCH and / or PUSCH, delivery confirmation information, etc.
- a random access preamble for example, Scheduling of the uplink reference signal and the like.
- control unit 301 uses the code points of the first information element (for example, Ssb-subcarrierOffset) and the second information element (for example, RMSI-PDCCH-Config or pdcchConfigSIB1) to search for synchronization rasters. And at least one of the search range and the search unnecessary range is controlled.
- the first information element for example, Ssb-subcarrierOffset
- the second information element for example, RMSI-PDCCH-Config or pdcchConfigSIB1
- the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
- the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 generates, for example, a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information based on an instruction from the control unit 301.
- the DL assignment and UL grant are both DCI and follow the DCI format.
- the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
- CSI Channel State Information
- the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
- the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
- the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301.
- the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.
- the measurement unit 305 performs measurement on the received signal.
- the measurement part 305 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
- the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, and the like based on the received signal.
- the measurement unit 305 includes received power (for example, RSRP (Reference Signal Received Power)), received quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)).
- Signal strength for example, RSSI (Received Signal Strength Indicator)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 301.
- FIG. 9 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment of the present invention.
- the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
- the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
- the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
- the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
- the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
- the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
- the downlink user data is transferred to the application unit 205.
- the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information of downlink data may be transferred to the application unit 205.
- uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
- the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- the transmission / reception unit 203 includes a first information element (for example, Ssb-subcarrierOffset) regarding the subcarrier offset and a second information element (for example, RMSI-PDCCH-Config or pdcchConfigSIB1) regarding the downlink control channel for system information.
- a first information element for example, Ssb-subcarrierOffset
- a second information element for example, RMSI-PDCCH-Config or pdcchConfigSIB1 regarding the downlink control channel for system information.
- An included synchronization signal block is received.
- FIG. 10 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment of the present invention.
- the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
- the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
- the control unit 401 controls the entire user terminal 20.
- the control unit 401 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal allocation in the mapping unit 403, and the like.
- the control unit 401 also controls signal reception processing in the reception signal processing unit 404, signal measurement in the measurement unit 405, and the like.
- the control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the radio base station 10 from the reception signal processing unit 404.
- the control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of determining the necessity of retransmission control for the downlink control signal and / or the downlink data signal.
- the control unit 401 Recognizing that there is no control resource set for system information corresponding to the synchronization signal block, and based on a code point (for example, using 8 bits) included in the second information element (for example, RMSI-PDCCH-Config) Information type to be notified.
- the control unit 401 Recognizing that there is no control resource set for system information corresponding to the synchronization signal block, and based on a code point (for example, using 8 bits) included in the second information element (for example, RMSI-PDCCH-Config) Information type to be notified.
- the control unit 401 determines that information regarding the synchronous raster position to be searched and the synchronous raster range that does not need to be searched is included. May be.
- a predetermined offset with respect to the synchronous raster position may be defined for the first code point in the second information element, and a reserved bit may be set for code points other than the first code point.
- a second code point for example, 00000000
- the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
- the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
- CSI channel state information
- the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
- the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
- the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
- the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
- the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
- the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
- the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
- the measurement unit 405 performs measurement on the received signal.
- the measurement part 405 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
- the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal.
- the measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 401.
- each functional block (components) are realized by any combination of hardware and / or software.
- the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one device physically and / or logically coupled, or directly and / or two or more devices physically and / or logically separated. Alternatively, it may be realized indirectly by connecting (for example, using wired and / or wireless) and using these plural devices.
- a radio base station, a user terminal, etc. in an embodiment of the present invention may function as a computer that performs processing of the radio communication method of the present invention.
- FIG. 11 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
- the wireless base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. 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 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
- processor 1001 may be implemented by one or more chips.
- Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to perform calculations by reading predetermined software (programs) on hardware such as the processor 1001 and the memory 1002, for example, via the communication device 1004. This is realized by controlling communication and controlling reading and / or writing of data 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 an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
- CPU central processing unit
- the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
- the processor 1001 reads programs (program codes), software modules, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
- programs program codes
- software modules software modules
- data data
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
- the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured by one.
- the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store programs (program codes), software modules, and the like that can be executed to implement the wireless communication method according to an embodiment of the present invention.
- the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
- FDD frequency division duplex
- TDD time division duplex
- the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) 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).
- the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
- the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.
- DSP digital signal processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the channel and / or symbol may be a signal (signaling).
- the signal may be a message.
- the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
- a component carrier CC: Component Carrier
- CC Component Carrier
- the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
- a subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that does not depend on the neurology.
- the slot may be configured by 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.
- the slot may be a time unit based on the numerology.
- the slot may include a plurality of mini slots. Each minislot may be configured with one or more symbols in the time domain. The minislot may also be called a subslot.
- Radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting signals. Different names may be used for the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- a plurality of consecutive subframes may be called a TTI
- TTI slot or one minislot
- a unit representing TTI may be called a slot, a minislot, or the like instead of a subframe.
- TTI means, for example, a minimum time unit for scheduling in wireless communication.
- a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit of a channel-encoded data packet (transport block), a code block, and / or a code word, or may be a processing unit such as scheduling or link adaptation.
- a time interval for example, the number of symbols
- a transport block, a code block, and / or a code word is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling unit. Further, the number of slots (the 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 called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe.
- a TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, or a subslot.
- a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI) is less than the TTI length of the long TTI and 1 ms. It may be replaced with a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. Further, the RB may include one or a plurality of symbols in the time domain, 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 blocks.
- One or more RBs include physical resource blocks (PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. May be called.
- the resource block may be configured by one or a plurality of resource elements (RE: Resource Element).
- RE Resource Element
- 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
- the structure of the above-described radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
- the information, parameters, and the like described in this specification may be expressed using absolute values, may be expressed using relative values from a predetermined value, or other corresponding information may be used. May be represented.
- the radio resource may be indicated by a predetermined index.
- names used for parameters and the like are not limited names in any way.
- various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
- information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
- the name is not limited in any way.
- information, signals, etc. can be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
- Information, signals, and the like may be input / output via a plurality of network nodes.
- the input / output information, signals, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
- information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
- DCI downlink control information
- UCI uplink control information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
- the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- the MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).
- notification of predetermined information is not limited to explicit notification, but implicitly (for example, by not performing notification of the predetermined information or other information) May be performed).
- the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
- the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
- software, instructions, information, etc. may be transmitted / received via a transmission medium.
- software can use websites, servers using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.) , Or other remote sources, these wired and / or wireless technologies are included within the definition of transmission media.
- system and “network” used in this specification are used interchangeably.
- base station BS
- radio base station eNB
- gNB gNodeB
- cell gNodeB
- cell group a base station
- carrier a base station
- a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
- the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, an indoor small base station (RRH: 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 service in this coverage. Point to.
- RRH indoor small base station
- MS mobile station
- UE user equipment
- terminal may be used interchangeably.
- a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
- NodeB NodeB
- eNodeB eNodeB
- access point transmission point
- reception point femtocell
- small cell small cell
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.
- the radio base station in this specification may be read by the user terminal.
- each aspect / embodiment of the present invention may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
- the user terminal 20 may have a function that the wireless base station 10 has.
- words such as “up” and “down” may be read as “side”.
- the uplink channel may be read as a side channel.
- a user terminal in this specification may be read by a radio base station.
- the wireless base station 10 may have a function that the user terminal 20 has.
- the operation performed by the base station may be performed by the upper node in some cases.
- various operations performed for communication with a terminal may include a base station and one or more network nodes other than the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited thereto) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect / embodiment described in this specification may be used alone, may be used in combination, or may be switched according to execution.
- the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed as long as there is no contradiction.
- the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.
- Each aspect / embodiment described in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile) communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-WideBand), Bluetooth (registered trademark) ), A system using another appropriate wireless communication method, and / or a next generation system extended based on these methods.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions. For example, “determination” means calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data). It may be considered to “judge” (search in structure), ascertaining, etc.
- “determination (decision)” includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”. Also, “determination” is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
- connection is any direct or indirect connection between two or more elements or By coupling, it can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
- the radio frequency domain can be considered “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and / or light (both visible and invisible) regions.
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Abstract
Description
第1の態様では、第1の情報要素において所定のコードポイントが指定された場合、同期信号ブロックに対応するシステム情報用の制御リソースセットが存在しないと認識し、且つ第2の情報要素に含まれるコードポイントに基づいて通知される情報種別を決定する。
第2の態様では、第1の情報要素においてサーチ不要な同期ラスタ範囲の通知用のコードポイントが指定される場合において、第2の情報要素において通知されるコードポイントに応じてサーチ不要な同期ラスタ範囲に関する情報が含まれないと判断する。
所定のリリース(例えば、Rel.15)において、RMSI-PDCCH-Configの特定のコードポイントを用いて次にサーチする同期ラスタ位置及びサーチ不要な同期ラスタ範囲に関する情報が含まれないことを通知可能とし、kssb=30(FR1)、又はkssb=14(FR2)を指定した場合のRMSI-PDCCH-Configの残りのコードポイントの解釈は将来リリース(例えば、Rel.16以降)で規定することも想定される。
以下、本発明の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図7は、本発明の一実施形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インターフェース106と、を備えている。なお、送受信アンテナ101、アンプ部102、送受信部103は、それぞれ1つ以上を含むように構成されればよい。
図9は、本発明の一実施形態に係るユーザ端末の全体構成の一例を示す図である。ユーザ端末20は、複数の送受信アンテナ201と、アンプ部202と、送受信部203と、ベースバンド信号処理部204と、アプリケーション部205と、を備えている。なお、送受信アンテナ201、アンプ部202、送受信部203は、それぞれ1つ以上を含むように構成されればよい。
なお、上記実施形態の説明に用いたブロック図は、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方法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/又は論理的に結合した1つの装置を用いて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/又は無線を用いて)接続し、これら複数の装置を用いて実現されてもよい。
なお、本明細書において説明した用語及び/又は本明細書の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及び/又はシンボルは信号(シグナリング)であってもよい。また、信号はメッセージであってもよい。参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(CC:Component Carrier)は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- サブキャリアオフセットに関する第1の情報要素及びシステム情報用の下り制御チャネルに関する第2の情報要素が含まれる同期信号ブロックを受信する受信部と、
前記第1の情報要素において所定のコードポイントが指定された場合、前記同期信号ブロックに対応するシステム情報用の制御リソースセットが存在しないと認識し、且つ前記第2の情報要素に含まれるコードポイントに基づいて通知される情報種別を決定する制御部と、を有することを特徴とするユーザ端末。 - 前記制御部は、前記第2の情報要素において第1のコードポイントが指定された場合、サーチすべき同期ラスタ位置及びサーチ不要な同期ラスタ範囲に関する情報は含まれないと判断することを特徴とする請求項1に記載のユーザ端末。
- 前記制御部は、前記第2の情報要素において前記第1のコードポイント以外のコードポイントが指定された場合、前記第1の情報要素において前記所定のコードポイント以外のコードポイントが指定された場合に前記第2の情報要素により通知される情報と異なる情報が通知されると判断することを特徴とする請求項1又は請求項2に記載のユーザ端末。
- 前記第2の情報要素における前記第1のコードポイントに対して、同期ラスタ位置に対する所定オフセットが定義され、前記第1のコードポイント以外のコードポイントは予約ビットが設定されることを特徴とする請求項1から請求項3のいずれかに記載のユーザ端末。
- 前記制御部は、前記第1の情報要素において、サーチ不要な同期ラスタ範囲を通知するコードポイントが指定され、且つ前記第2の情報要素において第2のコードポイントが指定された場合、サーチ不要な同期ラスタ範囲に関する情報は含まれないと判断することを特徴とする請求項1から請求項4のいずれかに記載のユーザ端末。
- サブキャリアオフセットに関する第1の情報要素及びシステム情報用の下り制御チャネルに関する第2の情報要素が含まれる同期信号ブロックを受信する工程と、
前記第1の情報要素において所定のコードポイントが指定された場合、前記同期信号ブロックに対応するシステム情報用の制御リソースセットが存在しないと認識し、且つ前記第2の情報要素に含まれるコードポイントに基づいて通知される情報種別を決定する工程と、を有することを特徴とするユーザ端末の無線通信方法。
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