WO2019049346A1 - ユーザ端末及び無線通信方法 - Google Patents
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- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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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
- LTE-A also referred to as LTE advanced, LTE Rel. 10 or 11 or 12
- LTE Rel. 8 or 9 LTE Successor systems
- FRA Fluture Radio Access
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- NX New radio access
- FX Fluture generation radio access
- downlink Downlink
- uplink are performed using subframes of 1 ms (also referred to as Transmission Time Interval (TTI)).
- TTI Transmission Time Interval
- UL Uplink
- the subframe is a transmission time unit of one channel-coded data packet, and is a processing unit such as scheduling, link adaptation, and retransmission control (HARQ: Hybrid Automatic Repeat reQuest).
- HARQ Hybrid Automatic Repeat reQuest
- the user terminal may be a UL control channel (for example, PUCCH (Physical Uplink Control Channel)) and / or a UL data channel (for example, Uplink control information (UCI) is transmitted using PUSCH (Physical Uplink Shared Channel).
- UL control channel for example, PUCCH (Physical Uplink Control Channel)
- PUSCH Physical Uplink Shared Channel
- the configuration (format) of the UL control channel is also called a PUCCH format or the like.
- UCI is a scheduling request (SR: Scheduling Request), retransmission control information (Hybrid Automatic Repeat reQuest-Acknowledge) (HARQ-ACK) for DL data (PDSCH: Physical Downlink Shared Channel), ACK / NACK (Negative ACK) ), And at least one of channel state information (CSI: Channel State Information).
- SR Scheduling Request
- HARQ-ACK retransmission control information
- PDSCH Physical Downlink Shared Channel
- ACK / NACK Negative ACK
- CSI Channel State Information
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- Future wireless communication systems eg, 5G, NR are expected to realize various wireless communication services to meet different requirements (eg, ultra high speed, large capacity, ultra low delay, etc.) There is.
- eMBB enhanced Mobile Broad Band
- mMTC massive Machine Type Communication
- URLLC Ultra Reliable and Low Latency Communications
- This invention is made in view of this point, and it aims at providing the user terminal and radio
- a user terminal is characterized in that a transmitter for transmitting a sequence using a cyclic shift associated with a value of uplink control information, and a parameter of the uplink control information based on a parameter notified from a radio base station. Controlling determination of a cyclic shift associated with a specific candidate value among a plurality of candidate values, and based on the determined cyclic shift, of the cyclic shift associated with another candidate value among the plurality of candidate values And a control unit that controls the determination.
- UL control information can be appropriately notified in a future wireless communication system.
- FIG. 1A and FIG. 1B are diagrams showing an example of sequence-based PUCCH.
- FIGS. 2A to 2D are diagrams showing an example of transmission signal generation processing for sequence based PUCCH.
- FIG. 3A and FIG. 3B are diagrams showing an example of equally spaced CS candidate sets.
- FIGS. 4A to 4C are diagrams showing an example of a CS candidate set in the case where the UCI length is 1 bit.
- FIG. 5A and FIG. 5B are diagrams showing an example of a CS candidate set in the case where the UCI length is 2 bits.
- 6A and 6B are diagrams showing an example of a CS candidate set when the UCI length is 1 bit, the usable index interval X is 2, and the maximum number of multiplexed UEs M is 3.
- 7A and 7B are diagrams showing an example of the association of UCI candidate values with CS indexes. It is a figure which shows an example of schematic structure of the radio
- Neurology may mean a set of communication parameters that characterize signal design in a certain radio access technology (RAT), design of the RAT, etc., subcarrier spacing (SCS: SubCarrier-Spacing), symbol length It may be a parameter regarding frequency direction and / or time direction, such as cyclic prefix length and subframe length.
- RAT radio access technology
- SCS SubCarrier-Spacing
- symbol length It may be a parameter regarding frequency direction and / or time direction, such as cyclic prefix length and subframe length.
- the same and / or different time unit eg, subframe, slot, minislot, It has been considered to introduce subslots, transmission time intervals (TTIs), short TTIs (sTTIs), radio frames, and so on.
- TTIs transmission time intervals
- sTTIs short TTIs
- radio frames and so on.
- TTI may represent a unit of time for transmitting and receiving transport blocks, code blocks, and / or codewords of transmission and reception data.
- the time interval (number of symbols) in which the transport block, code block, and / or codeword of data is actually mapped may be shorter than the TTI.
- the TTI includes a predetermined number of symbols (for example, 14 symbols)
- transport blocks, code blocks, and / or codewords of transmission and reception data are transmitted and received in one to a predetermined number of symbol intervals therefrom.
- the number of symbols for transmitting / receiving transport blocks, code blocks, and / or codewords of transmitted / received data is smaller than the number of symbols in TTI, mapping reference signals, control signals, etc. to symbols that do not map data in TTI can do.
- a subframe may be a unit of time having a predetermined length of time (for example, 1 ms) regardless of the terminology used (and / or set) by a user terminal (for example, UE: User Equipment).
- UE User Equipment
- the slot may be a time unit based on the numerology used by the UE. For example, when the subcarrier spacing is 15 kHz or 30 kHz, the number of symbols per slot may be 7 or 14 symbols. When the subcarrier spacing is 60 kHz or more, the number of symbols per slot may be 14 symbols. Also, the slot may include a plurality of minislots.
- short PUCCH Physical Uplink Control Channel
- long PUCCH Physical Uplink Control Channel
- a short PUCCH has a predetermined number of symbols (eg, 1, 2 or 3 symbols) in a certain SCS.
- uplink control information UCI: Uplink Control Information
- reference signal RS: Reference Signal
- TDM Time Division Multiplexing
- FDM Frequency Division Multiplexing
- RS may be, for example, a demodulation reference signal (DMRS: DeModulation Reference Signal) used for demodulation of UCI.
- DMRS DeModulation Reference Signal
- the SCS of each symbol of the short PUCCH may be the same as or higher than the SCS of a symbol for a data channel (hereinafter, also referred to as a data symbol).
- the data channel may be, for example, a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), or the like.
- PUCCH may be read as “short PUCCH” or “PUCCH in short duration”.
- the PUCCH may be TDM and / or FDM with a UL data channel (hereinafter also referred to as PUSCH) in a slot. Also, the PUCCH may be TDM and / or FDM with a DL data channel (hereinafter also referred to as PDSCH) and / or a DL control channel (hereinafter referred to as PDCCH: Physical Downlink Control Channel) in a slot.
- PUSCH UL data channel
- PUCCH Physical Downlink Control Channel
- a DMRS-based PUCCH (DMRS-based transmission or DMRS-based PUCCH) that notifies UCI by transmitting a DM signal and UCI with FDM and / or TDM as a short PUCCH transmission method, and UCI without using DMRS.
- a sequence based PUCCH (sequence-based transmission or sequence-based PUCCH) that reports UCI by transmitting a UL signal using a code resource associated with a value of.
- the DMRS-based PUCCH may be referred to as coherent transmission, coherent design, etc. to transmit the PUCCH because it includes RSs for UCI demodulation.
- the sequence-based PUCCH may be referred to as non-coherent transmission, noncoherent design, etc., because it reports UCI on PUCCHs that do not include RS for demodulation of UCI.
- sequence having a sequence length of 12 is mapped to consecutive 12 REs (Resource Elements) in a PRB (Physical Resource Block) for a 1-symbol short PUCCH for UCI up to 2 bits.
- a sequence having a sequence length of 24, 48 may be used.
- the sequence based PUCCH and other sequences may be multiplexed using CDM (Code Division Multiplexing) or FDM.
- the code resource for sequence-based PUCCH is a resource that can be code division multiplexed, and may be at least one of a reference sequence, a cyclic shift amount (phase rotation amount), and an OCC (Orthogonal Cover Code).
- the cyclic shift may be read as phase rotation.
- Information on time resources, frequency resources, and / or code resources for sequence-based PUCCH may be upper layer signaling (eg, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB) (Master Information Block), SIB (System Information Block), etc.), physical layer signaling (eg, DCI), or a combination thereof may be notified from the NW (network, eg, base station, gNodeB) to the UE.
- RRC Radio Resource Control
- MAC Medium Access Control
- MIB Master Information Block
- SIB System Information Block
- DCI Physical layer signaling
- the reference sequence may be a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence (e.g., a Zadoff-chu sequence), or 3GPP TS 36.211 ⁇ ⁇ 5.5.1.2 (in particular, Table 5.5. 1.2-1 (Table 5.5.1.2-2) or the like may be a sequence (CG-CAZAC (computer generated CAZAC) sequence) conforming to the CAZAC sequence.
- CAZAC Constant Amplitude Zero Auto-Correlation
- CG-CAZAC computer generated CAZAC
- CS cyclic shift
- the phase rotation amount ⁇ 0 - ⁇ 11 may be defined based on at least one of the number of subcarriers M, the number of PRBs, and the sequence length of the reference sequence.
- the cyclic shift candidate set may include two or more phase rotation amounts selected from the phase rotation amounts ⁇ 0 - ⁇ 11 .
- Sequence-based PUCCH reports control information including at least one of ACK / NACK (A / N), CSI, and SR.
- UCI indicating A / N and / or CSI and presence of SR may be called UCI including SR
- UCI indicating A / N and / or CSI and no SR May be called UCI without SR.
- control information indicating A / N and / or CSI is referred to as UCI
- control information indicating SR presence or absence is referred to as SR presence / absence.
- UCI values 0 and 1 may correspond to “NACK” and “ACK”, respectively.
- UCI values 00, 01, 11, 10 correspond to "NACK-NACK”, “NACK-ACK”, “ACK-ACK”, and “ACK-NACK”, respectively. Good.
- the UE when UCI is 2 bits, the UE performs phase rotation of the reference sequence using the phase rotation amount corresponding to the value to be transmitted among the 4 candidates of the 2 bit UCI value. And transmit the phase rotated signal using a given time / frequency resource.
- the time / frequency resources are time resources (eg, subframes, slots, symbols, etc.) and / or frequency resources (eg, carrier frequency, channel band, CC (Component Carrier), PRB, etc.).
- FIG. 2 is a diagram illustrating an example of transmission signal generation processing for sequence-based PUCCH.
- the reference sequence X 0 -X M-1 of sequence length M is phase rotated (cyclically shifted) using the selected phase rotation amount ⁇ , and the phase rotated reference sequence is OFDM (Orthogonal Input to a Frequency Division Multiplexing) transmitter or a DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) transmitter.
- the UE transmits the output signal from the OFDM transmitter or DFT-S-OFDM transmitter.
- phase rotation amount candidate ⁇ 0 - ⁇ 3 When phase rotation amount candidate ⁇ 0 - ⁇ 3 is associated with UCI information candidate 0-3 and information 0 is notified as UCI, as shown in FIG. 2A, the UE can generate a reference sequence X 0 -X M-1 Are phase rotated using the phase rotation amount ⁇ 0 associated with the information 0. Similarly, when notifying information 1-3 as UCI, the UE associates the reference sequence X 0 -X M-1 with the information 1-3 as shown in FIG. 2B, FIG. 2C and FIG. 2D, respectively. Phase rotation is performed using phase rotation amounts ⁇ 1 , ⁇ 2 and ⁇ 3 .
- the NW may determine the UCI from the received signal using maximum likelihood detection (MLD: may be called correlation detection or correlation detection).
- MLD maximum likelihood detection
- the network generates a replica (phase rotation amount replica) of each phase rotation amount allocated to the user terminal (for example, when the UCI payload length is 2 bits, four pattern phase rotation amount replicas).
- the transmission signal waveform may be generated similarly to the user terminal using the reference sequence and the phase rotation amount replica.
- the network calculates the correlation between the obtained transmission signal waveform and the received signal waveform received from the user terminal for all phase rotation replicas, and estimates that the highest correlation phase rotation replica is transmitted. You may
- the network is obtained by performing phase rotation of the phase rotation amount replica on the reference sequence of the transmission signal for each element of the received signal sequence (M complex number sequences) after DFT of size M. It is assumed that the phase rotation replica having the largest absolute value (or the square of the absolute value) of the sum of the M obtained sequences is sent by multiplying the complex conjugate of the transmitted signal sequence (M complex sequences) by multiplication. It may be assumed.
- the network generates transmit signal replicas for the maximum allocation number (12 in the case of 1 PRB) of phase rotation amount, and estimates the phase rotation amount having the highest correlation with the received signal by the same operation as the above MLD. You may When a phase rotation amount other than the allocated phase rotation amount is estimated, it may be estimated that the phase rotation amount closest to the estimated phase rotation amount among the allocated phase rotation amounts is transmitted.
- the base station determines, for example, the UCI value and the presence or absence of SR by performing MLD on the received sequence-based PUCCH.
- the NW needs to set the resource number corresponding to the UCI candidate value to the UE.
- UCI is 1 bit
- the number of resource numbers corresponding to UCI candidate values is two.
- UCI is 2 bits
- the number of resource numbers corresponding to UCI candidate values is four.
- Each bit of UCI indicates, for example, ACK or NACK.
- the resource number may be a symbol number and / or a slot number indicating a time resource of sequence-based PUCCH.
- the resource number may be a PRB index indicating frequency resources of sequence-based PUCCH.
- the resource number may be a sequence number (sequence index) indicating a reference sequence used for sequence-based PUCCH. When the sequence length of the reference sequence is 12, the sequence number may indicate any of 0 to 29.
- the resource number may be a CS index used for sequence-based PUCCH. When the sequence length of the reference sequence is 12, the CS index may indicate any of 0 to 11.
- the number of CS indexes available for sequence based PUCCH may be limited.
- the number, the index, the identifier, and the identification information can be reworded to each other.
- the resource number of the specific candidate value among the plurality of candidate values of UCI is determined based on the parameter notified from the NW, and the plurality of candidate values is determined based on the resource number of the specific candidate value. Of the other resource numbers.
- the resource number of the specific candidate value may be notified to the UE.
- the UE determines resource numbers of other candidate values based on the resource numbers of specific candidate values.
- the NW may notify the UE of the resource number of the specific candidate value by higher layer signaling (eg, RRC signaling and / or broadcast information (MIB, SIB, etc.)).
- higher layer signaling eg, RRC signaling and / or broadcast information (MIB, SIB, etc.)
- candidate values 0 and 1 indicate NACK (N) and ACK (A), respectively.
- the NW notifies the UE of the CS index of the specific candidate value N.
- the UE determines A's CS index based on N resource numbers.
- candidate values 00, 01, 11, 10 indicate NN, NA, AA, AN, respectively.
- the resource number of the specific candidate value N is notified from the NW to the UE.
- the UE determines A's CS index based on N's CS index.
- the sequence length (number of REs) of the sequence-based PUCCH is L
- the number of CS candidates in the CS candidate set (UCSI candidate number) is K.
- the CS index is 0, 1, ..., L-1.
- the CS candidate interval in the CS candidate set is a constant CS index interval D
- the CS index interval D is represented by L / K.
- the CS candidates (phase rotation amounts) in each CS candidate set may have an interval of 2 ⁇ / K.
- the phase of the specific RE becomes constant regardless of the candidate value.
- the NW can perform channel estimation using a signal of a specific RE. That is, the NW can use a signal of a specific RE as a DMRS (Demodulation Reference Signal).
- the NW may demodulate UCI using the channel estimation result.
- this CS candidate set flexible receiver configuration can be used in the NW.
- the NW may demodulate UCI using the MLD described above, or may demodulate UCI based on the channel estimation result by DMRS of a specific RE, or it may demodulate using a combination of them. Good. Also, the NW may estimate the noise variance using the specific RE.
- sequence length L is 12
- sequence length L may not be 12.
- sequence length L may be 24 or 48.
- CS candidate number K is 2 and CS index interval D is 6, so CS candidate set # 1- # 6 is set, and each CS candidate is set.
- the set has two CS indexes.
- the CS candidates in each CS candidate set have an interval of 2 ⁇ / K, or ⁇ .
- the signals of six specific REs having an interval of 2 REs become constant regardless of candidate values, and can be used as DMRS.
- CS candidate number K is 4 and CS index interval D is 3, so CS candidate set # 1- # 3 is set, and each CS candidate is The set has 4 CS indexes.
- sequence-based PUCCHs of up to 3 UEs are multiplexed.
- the CS candidates in each CS candidate set have an interval of 2 ⁇ / K, ie, ⁇ / 2.
- the signals of three specific REs having an interval of 4 REs become constant regardless of the candidate value, and can be used as DMRS.
- the UE When notified of the CS index I of the specific candidate value, the UE determines the CS index of the other candidate value by sequentially adding the CS index interval D to the CS index I of the specific candidate value. By this operation, the UE can determine the CS candidate set.
- the CS index interval D is 3.
- the UE uses the CS index interval D to determine 4, 7, 10 as other CS indexes.
- the available CS index interval is referred to as the available index interval X
- the maximum number of UEs that can be multiplexed by CS is referred to as the maximum UE multiplexing number M.
- the available index interval X or the maximum UE multiplexing number M may be notified from the NW to the UE via higher layer signaling (eg, RRC signaling and / or broadcast information).
- the number of CS candidate sets is equal to M.
- the NW may notify the UE of the CS candidate set index S as a parameter instead of the CS index of the specific candidate value.
- the CS candidate set index S is 1, 2, ..., M.
- the UE may determine the CS candidate set based on the available index interval X or the maximum UE multiplexing number M and the CS candidate set index S.
- the UE determines (S-1) + X ⁇ S as the CS index of the specific candidate value, and sequentially adds D to the CS index of the specific candidate value, and so on. Determine the CS index of the candidate value of By this operation, the UE can determine the CS candidate set.
- the usable index interval X is obtained by L / K / M, so that the UE can determine the CS candidate set as in the case where the usable index interval X is notified. .
- FIGS. 4A to 4C are diagrams showing an example of a CS candidate set in the case where the UCI length is 1 bit.
- the CS candidate number K is two
- the CS index interval D is three.
- FIG. 4A shows the case where the available index interval X is 1 and the maximum UE multiplexing number M is 6. For example, if the CS candidate set index S is 2, the UE determines that the CS index in the CS candidate set is 1,7.
- FIG. 4B shows the case where the available index interval X is 2 and the maximum UE multiplexing number M is 3. For example, when the CS candidate set index S is 2, the UE determines that the CS index in the CS candidate set is 2 or 8.
- FIG. 4C shows the case where the available index interval X is 3 and the maximum UE multiplexing number M is 2. For example, if the CS candidate set index S is 2, the UE determines that the CS index in the CS candidate set is 3,9.
- the information amount of the CS candidate set index S is the specific candidate It is less than the amount of information in the value CS index.
- the CS index of the specific candidate value is any of 0 to 5, and therefore, the information amount of the CS index of the specific candidate value is 3 bits.
- the usable index interval X is 2, since the CS candidate set index S is any of 1 to 3, the information amount of the CS candidate set index S is 2 bits.
- CS candidate sets at equal intervals (phase 2 ⁇ / K) can be determined, and overhead of notification of CS candidate sets can be suppressed.
- Method of determining resource number by UE Whether to multiplex (CDM) sequence-based PUCCHs of different UEs (in the CS domain) using different CSs (perform UE multiplexing) is upper layer signaling (eg, RRC signaling and / or broadcast information) as a parameter May be notified from the NW to the UE.
- upper layer signaling eg, RRC signaling and / or broadcast information
- the NW assigns different CS candidate sets to different UEs, and notifies the UEs to perform UE multiplexing.
- the UE is notified of the CS index of the specific candidate value in the CS candidate set as described above, and may determine another CS index in the CS candidate set based on the CS index of the specific candidate value. Good.
- the UE may determine a CS candidate set based on a predetermined rule.
- the NW and the UE can determine the same CS candidate set by determining the CS candidate set using the same rules as the UE.
- the CS candidate set index may be determined based on at least one of UE index (UE ID), slot index, and cell index (cell ID). For example, the CS candidate set index may be determined by ((UE index ⁇ cell index) mod D) +1.
- FIG. 5A and FIG. 5B are diagrams showing an example of a CS candidate set in the case where the UCI length is 2 bits.
- FIG. 5A shows the case of performing UE multiplexing.
- the CS candidate number K is two, and the CS index interval D is three.
- the UE determines the CS index in the CS candidate set as 1, 4, 7, 10.
- FIG. 5B shows the case where UE multiplexing is not performed.
- the UCI length is 2 bits. If the UE determines that the CS candidate set index is 1 based on the UE index and the cell index, the UE determines the CS index in the CS candidate set as 0, 3, 6, 9.
- the CS candidate set index can be randomized by determining the CS candidate set index based on at least one of the UE index, the slot index, and the cell index. Also, by determining the CS candidate set index based on the cell index, the probability that the CS candidate set index matches between adjacent cells can be reduced, and inter-cell interference can be prevented.
- the amount of information of notification indicating whether or not to perform UE multiplexing is 1 bit, so it is smaller than the amount of information of the CS index of the specific candidate value.
- the overhead of notification can be reduced because the UE does not receive information indicating a CS candidate or a CS candidate set.
- the information which shows whether UE multiplexing is performed may be based on the other information notified from NW.
- the information indicating that UE multiplexing is not performed may be an available index interval X or an invalid value of the maximum UE multiplexing number M.
- notification of any one of 1 to 3 as the usable index interval X indicates that UE multiplexing is performed, and 0, 4 and the like are notified as the usable index interval X. May indicate that UE multiplexing is not performed.
- any one of 2, 3 and 6 is notified as the maximum UE multiplexing number M indicates that UE multiplexing is performed, and that 0, 1 etc. are notified as the maximum UE multiplexing number M It may indicate that multiplexing is not performed.
- the information indicating that UE multiplexing is to be performed may be an available index interval X or a valid value of the maximum UE multiplexing number M.
- the UE may determine a CS candidate set when not explicitly notified that UE multiplexing will not be performed.
- the CS candidate set index may be determined based on at least one of the parameters of the PDSCH resource index (which may be the minimum and maximum indices) corresponding to the A / N.
- the CS candidate set index may use the remainder by D of the value Z obtained from any of these parameters. For example, the CS candidate set index may be determined by ((UE index ⁇ cell index ⁇ PRB index) mod D) +1.
- the UE may use, as each parameter, a parameter obtained by converting a parameter notified from the NW according to a predetermined conversion formula. For example, using a value W notified by higher layer signaling (for example, RRC signaling or broadcast information) and a PRB index notified from the NW, PRB index + (W mod PRB index) is set as a new PRB index, You may use for calculation of CS candidate set index.
- W notified by higher layer signaling for example, RRC signaling or broadcast information
- PRB index + W mod PRB index
- CS candidates in the CS candidate set may not have an interval of 2 ⁇ / K.
- the CS candidate interval Y represents the interval of CS candidates in the CS candidate set in units of the number of available CS indexes.
- CS candidate interval Y may be notified from the NW to the UE via higher layer signaling (eg, RRC signaling and / or broadcast information).
- the UE may determine the CS candidate set based on the available index interval X or the maximum UE multiplexing number M, the CS candidate interval Y, and the CS index of the specific candidate value.
- the CS index interval D is obtained by X ⁇ Y.
- the CS index interval D is obtained by L / K / M ⁇ Y.
- the UE When notified of the CS index I of the specific candidate value, the UE determines the CS index of the other candidate value by sequentially adding the CS index interval D to the CS index I of the specific candidate value.
- FIGS. 6A and 6B are diagrams showing an example of a CS candidate set when the UCI length is 1 bit, the usable index interval X is 2, and the maximum number of multiplexed UEs M is 3.
- FIG. 6A shows the case where the CS candidate interval Y is three.
- the CS index interval D is six.
- the UE determines 10 as the CS index of another candidate value.
- FIG. 6B shows the case where the CS candidate interval Y is 1.
- the CS index interval D is two.
- the UE determines 6 as the CS index of another candidate value.
- the UE can appropriately set the CS candidate set even if the CS candidates in the CS candidate set do not have a 2 ⁇ / K interval. Moreover, the overhead of notification can be suppressed compared to the case of notifying all the CS indexes in the CS candidate set from the NW to the UE.
- the error rate may be reduced by associating the UCI candidate value with the CS index.
- candidate values may be mapped using Gray code.
- FIG. 7A is a diagram illustrating an example of mapping of candidate values using a gray code. Even in the environment where the frequency selectivity is large, even when the demodulation result changes to the adjacent CS candidate (phase rotation amount), the error rate can be suppressed because it is an error of 1 bit among 2 bits.
- Candidate values may be associated with CS candidates, provided that CS candidates (phase rotation amounts) adjacent to each other are not assigned to the same candidate value of different UEs. In particular, it is avoided that CS candidates adjacent to each other are assigned to ACKs or ACK-ACKs of different UEs. Since the occurrence probability of ACK transmission is about 90%, it is possible to improve the ACK to NACK error rate and the NACK to ACK error rate by separating CS candidates of different ACKs.
- FIG. 7B is a diagram showing an example of mapping of candidate values for avoiding adjacent ACK-ACKs. For example, with respect to one CS candidate set of FIG. 7A, the next CS candidate set is rotated left by ⁇ / 2. If the UCI length is one bit, ACKs and NACKs of different UEs may be alternately arranged.
- the UCI error rate can be suppressed by associating the candidate value with the CS candidate.
- 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. 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- the radio communication system 1 applies carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are integrated. can do.
- CA carrier aggregation
- 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), and 5G. It may be called (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology) or the like, or may be called a system for realizing these.
- the radio communication system 1 includes a radio base station 11 forming a macrocell C1 with a relatively wide coverage, and radio base stations 12 (12a to 12c) disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. And. 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 simultaneously uses the macro cell C1 and the small cell C2 by CA or DC. Also, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, 5 or less CCs, 6 or more CCs).
- CCs cells
- Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth carrier (also called an existing carrier, legacy carrier, etc.).
- a carrier having a wide bandwidth in a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- the configuration of the frequency band used by each wireless base station is not limited to this.
- a wired connection for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.
- a wireless connection for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.
- CPRI Common Public Radio Interface
- X2 interface X2 interface
- the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.
- RNC radio network controller
- MME mobility management entity
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and is a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), transmission and reception It may be called a point or the like.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.
- Each user terminal 20 is a terminal compatible with various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).
- orthogonal frequency division multiple access (OFDMA) is applied to the downlink as a radio access scheme, and single carrier frequency division multiple access (SC-FDMA: single carrier) to the uplink.
- SC-FDMA single carrier frequency division multiple access
- Frequency Division Multiple Access and / or OFDMA is applied.
- OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier to perform communication.
- SC-FDMA is a single carrier transmission method that reduces interference between terminals by dividing the system bandwidth into bands of one or continuous resource blocks for each terminal and using different bands by a plurality of terminals.
- the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
- a downlink shared channel (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, etc. are used as downlink channels. Used. User data, upper layer control information, SIB (System Information Block) and the like are transmitted by the PDSCH. Also, a MIB (Master Information Block) is transmitted by the PBCH.
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- MIB Master Information Block
- the downlink L1 / L2 control channel includes 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) including scheduling information of PDSCH and / or PUSCH is transmitted by PDCCH.
- scheduling information may be notified by DCI.
- DCI scheduling DL data reception may be referred to as DL assignment
- DCI scheduling UL data transmission may be referred to as UL grant.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- Delivery confirmation information (for example, also referred to as retransmission control information, HARQ-ACK, or ACK / NACK) of HARQ (Hybrid Automatic Repeat reQuest) for the PUSCH is transmitted by the PHICH.
- the EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel), and is used for transmission such as DCI, similarly to the PDCCH.
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used.
- User data, upper layer control information, etc. are transmitted by PUSCH.
- downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, scheduling request (SR: Scheduling Request), etc. are transmitted by the PUCCH.
- the PRACH transmits a random access preamble for establishing a connection with a cell.
- a cell-specific reference signal (CRS: Cell-specific Reference Signal), a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), a demodulation reference signal (DMRS: DeModulation Reference Signal, positioning reference signal (PRS), etc.
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information-Reference Signal
- DMRS DeModulation Reference Signal
- PRS positioning reference signal
- SRS Sounding Reference Signal
- DMRS demodulation reference signal
- PRS positioning reference signal
- DMRS Demodulation reference signal
- PRS positioning reference signal
- FIG. 9 is a diagram showing an example of the entire configuration of a radio base station according to an embodiment of the present invention.
- the radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
- each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.
- User data transmitted from the radio base station 10 to the user terminal 20 by downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- the baseband signal processing unit 104 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data.
- Control Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc. It is transferred to 103. Further, transmission processing such as channel coding and inverse fast Fourier transform is also performed on the downlink control signal and transferred to the transmission / reception unit 103.
- the transmission / reception unit 103 converts the baseband signal output from the baseband signal processing unit 104 for each antenna into a radio frequency band and transmits the baseband signal.
- the radio frequency signal frequency-converted by the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101.
- the transmission / reception unit 103 can be configured of a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on the common recognition in the technical field according to the present invention.
- the transmitting and receiving unit 103 may be configured as an integrated transmitting and receiving unit, or may be configured from a transmitting unit and a receiving unit.
- the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
- the transmitting and receiving unit 103 receives the upstream signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on user data included in the input upstream signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106.
- the call processing unit 105 performs call processing (setting, release, etc.) of the communication channel, state management of the radio base station 10, management of radio resources, and the like.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the other wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). May be
- an inter-base station interface for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface.
- the transmission / reception unit 103 may receive a sequence (sequence-based PUCCH) using a cyclic shift associated with the value of uplink control information (UCI).
- sequence-based PUCCH sequence-based PUCCH
- UCI uplink control information
- the transmission / reception unit 103 may transmit the parameters for sequence-based PUCCH to the user terminal 20.
- FIG. 10 is a diagram showing an example of a functional configuration of a wireless base station according to an embodiment of the present invention.
- the functional block of the characteristic part in this embodiment is mainly shown, and suppose that the wireless base station 10 also has another functional block required for wireless communication.
- the baseband signal processing unit 104 at least includes 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. Note that these configurations may be included in the wireless base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104.
- a control unit (scheduler) 301 performs control of the entire radio base station 10.
- the control unit 301 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
- the control unit 301 controls, for example, generation of a signal by the transmission signal generation unit 302, assignment of a signal by the mapping unit 303, and the like. Further, the control unit 301 controls reception processing of a signal by the reception signal processing unit 304, measurement of a signal by the measurement unit 305, and the like.
- the control unit 301 schedules (for example, resources) system information, downlink data signals (for example, signals transmitted on PDSCH), downlink control signals (for example, signals transmitted on PDCCH and / or EPDCCH, delivery confirmation information, etc.) Control allocation). Further, the control unit 301 controls generation of the downlink control signal, the downlink data signal, and the like based on the result of determining whether the retransmission control for the uplink data signal is necessary or not. The control unit 301 also 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.
- PSS Primary Synchronization Signal
- SSS Synchronization Signal
- the control unit 301 may use 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, PRACH). Control the scheduling of transmitted signals, uplink reference signals, etc.
- 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, PRACH
- the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal or the like) based on an instruction from the control unit 301, and outputs the downlink signal to the mapping unit 303.
- the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit or a signal generation device described based on the common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 generates, for example, DL assignment for notifying downlink data allocation information and / or UL grant for notifying uplink data allocation information, based on an instruction from the control unit 301.
- DL assignment and UL grant are both DCI and follow DCI format.
- coding processing and modulation processing are performed on the downlink data signal according to a coding rate, a modulation method, and the like determined based on channel state information (CSI: Channel State Information) and the like from each user terminal 20.
- CSI Channel State Information
- Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the mapped downlink signal to transmission / reception section 103.
- the mapping unit 303 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103.
- the reception signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the received signal processing unit 304 can be configured from a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 outputs the information decoded by the reception process to the control unit 301. For example, when the PUCCH including the HARQ-ACK is received, the HARQ-ACK is output to the control unit 301. Further, 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 measuring unit 305 can be configured from a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.
- the measurement unit 305 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like based on the received signal.
- the measurement unit 305 may use 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)), signal strength (for example, RSSI (for example). Received Signal Strength Indicator), propagation path information (eg, CSI), etc. may be measured.
- the measurement result may be output to the control unit 301.
- control unit 301 may assign a radio resource for sequence-based PUCCH. Also, the control unit 301 may assign a sequence index for sequence-based PUCCH.
- FIG. 11 is a diagram showing an example of the entire configuration of a user terminal according to an embodiment of the present invention.
- the user terminal 20 includes a plurality of transmitting and receiving antennas 201, an amplifier unit 202, a transmitting and receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
- each of the transmitting and receiving antenna 201, the amplifier unit 202, and the transmitting and receiving unit 203 may 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 transmitting and receiving unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 204.
- the transmission / reception unit 203 can be configured of a transmitter / receiver, a transmission / reception circuit or a transmission / reception device described based on the common recognition in the technical field according to the present invention.
- the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the baseband signal processing unit 204 performs reception processing of FFT processing, error correction decoding, retransmission control, 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 on a layer higher than the physical layer and the MAC layer. Moreover, broadcast information may also be transferred to the application unit 205 among downlink data.
- 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 processing of retransmission control (for example, transmission processing of HARQ), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. It is transferred to 203.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
- the radio frequency signal frequency-converted by the transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.
- the transmitting / receiving unit 203 may transmit a sequence (sequence-based PUCCH) using a cyclic shift associated with the value of uplink control information (UCI).
- sequence-based PUCCH sequence-based PUCCH
- UCI uplink control information
- the transmission / reception unit 203 may receive parameters for sequence-based PUCCH from the radio base station 10.
- FIG. 12 is a diagram showing 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 is assumed that the user terminal 20 also has another functional block required for wireless communication.
- the baseband signal processing unit 204 included in the user terminal 20 at least includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. 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 configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.
- the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402, assignment of signals by the mapping unit 403, and the like. Further, the control unit 401 controls reception processing of a signal by the reception signal processing unit 404, measurement of a signal by 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 the retransmission control for the downlink control signal and / or the downlink data signal.
- control unit 401 When the control unit 401 acquires various types of information notified from the radio base station 10 from the received signal processing unit 404, the control unit 401 may update parameters used for control based on the information.
- the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal or the like) 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 from a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates, for example, 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. Further, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, when the downlink control signal notified from the radio base station 10 includes a UL grant, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal.
- CSI channel state information
- Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the uplink signal to transmission / reception section 203.
- the mapping unit 403 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.
- the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 203.
- the reception signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, or the like) transmitted from the radio base station 10.
- the received signal processing unit 404 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Also, the received signal processing unit 404 can constitute a receiving unit according to the present invention.
- the reception signal processing unit 404 outputs the information decoded by the reception process to the control unit 401.
- the received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, 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 measuring unit 405 can be configured of a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present 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), signal strength (for example, RSSI), channel information (for example, CSI), and the like.
- the measurement result may be output to the control unit 401.
- control unit 401 controls parameters notified from the radio base station (for example, resource numbers of specific candidate values (CS index), usable index interval X, maximum number of multiplexed UEs M, CS candidate set index S, UE multiplexing Specific candidate among a plurality of candidate values of uplink control information (for example, the value of 1-bit or 2-bit delivery confirmation information) based on information indicating whether to perform or at least one of CS candidate interval Y).
- CS index resource numbers of specific candidate values
- X maximum number of multiplexed UEs M
- CS candidate set index S UE multiplexing Specific candidate among a plurality of candidate values of uplink control information (for example, the value of 1-bit or 2-bit delivery confirmation information) based on information indicating whether to perform or at least one of CS candidate interval Y).
- Control the determination of the cyclic shift associated with the value e.g. ACK in 1-bit UCI, ACK-ACK in 2 bits UCI
- the parameters may also include the number of cyclic shifts associated with a particular candidate value.
- the plurality of cyclic shifts respectively associated with the plurality of candidate values may respectively correspond to a plurality of phase rotation amounts obtained by equally dividing 2 ⁇ by the number (K) of the plurality of candidate values.
- the parameters may also include information indicating whether or not a sequence and a sequence transmitted from another user terminal are code division multiplexed (for example, UE multiplexed).
- cyclic shifts associated with the acknowledgment of the user terminal 20 are acknowledgments to other user terminals. It does not have to be adjacent to the associated cyclic shift.
- each functional block is realized using one physically and / or logically coupled device, or directly and / or two or more physically and / or logically separated devices. Or it may connect indirectly (for example, using a wire communication and / or radio), and it may be realized using a plurality of these devices.
- a wireless base station, a user terminal, and the like in an embodiment of the present invention may function as a computer that performs the processing of the wireless communication method of the present invention.
- FIG. 13 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
- the above-described wireless base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like. Good.
- the term “device” can be read as a circuit, a device, a unit, or the like.
- the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.
- processor 1001 may be implemented by one or more chips.
- Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication device 1004 is performed. 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 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
- CPU central processing unit
- the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
- a program a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, or may be realized similarly for other functional blocks.
- the memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or any other suitable storage medium. It may 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 may store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present invention.
- the storage 1003 is a computer readable recording medium, and for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.
- a computer readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
- FDD frequency division duplex
- TDD time division duplex
- the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, and the like) that performs output to the outside.
- the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc.
- DSPs digital signal processors
- ASICs application specific integrated circuits
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- Hardware may be included, and part or all of each functional block may be realized using the hardware.
- processor 1001 may be implemented using at least one of these hardware.
- the channels and / or symbols may be signaling.
- the signal may be a message.
- the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard.
- a component carrier CC: Component Carrier
- CC Component Carrier
- the radio frame may be configured by one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe.
- a subframe may be configured by one or more slots in the time domain.
- the subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.
- the slot may be configured by one or more symbols in the time domain (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.).
- the slot may be a time unit based on the neurology.
- the slot may include a plurality of minislots. Each minislot may be configured by one or more symbols in the time domain. Minislots may also be referred to as subslots.
- a radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal.
- subframes, slots, minislots and symbols other names corresponding to each may be used.
- one subframe may be referred to as a transmission time interval (TTI)
- TTI transmission time interval
- a plurality of consecutive subframes may be referred to as a TTI
- one slot or one minislot may be referred to as a TTI.
- TTI transmission time interval
- the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a minislot, etc. instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the radio base station performs scheduling to assign radio resources (frequency bandwidth usable in each user terminal, transmission power, etc.) to each user terminal in TTI units.
- radio resources frequency bandwidth usable in each user terminal, transmission power, etc.
- the TTI may be a transmission time unit of a channel encoded data packet (transport block), a code block, and / or a codeword, or may be a processing unit such as scheduling and link adaptation. Note that, when a TTI is given, the time interval (eg, the number of symbols) in which the transport block, the code block, and / or the codeword is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (the number of minislots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, or the like.
- a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, or the like.
- a long TTI for example, a normal TTI, a subframe, etc.
- a short TTI eg, a shortened TTI, etc.
- a resource block is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI and one subframe may be respectively configured by one or more resource blocks. Note that one or more RBs may be 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, etc. It may be called.
- PRB Physical resource block
- SCG Sub-Carrier Group
- REG Resource Element Group
- a resource block may be configured by one or more resource elements (RE: Resource Element).
- RE Resource Element
- one RE may be one subcarrier and one symbol radio resource region.
- the above-described structures such as the radio frame, subframe, slot, minislot and symbol are merely examples.
- the number of subframes included in a radio frame the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB
- the number of subcarriers, as well as the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be variously changed.
- the information, parameters, etc. described in the present specification may be expressed using absolute values, may be expressed using relative values from predetermined values, or other corresponding information. May be represented.
- radio resources may be indicated by a predetermined index.
- the names used for parameters and the like in the present specification are not limited names in any respect.
- various channels PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.
- information elements can be identified by any suitable names, various assignments are made to these various channels and information elements.
- the name is not limited in any way.
- data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
- information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- the input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.
- notification of information is not limited to the aspects / embodiments described herein, and may be performed using other methods.
- notification of information may be physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling, other signals, or a combination thereof.
- DCI downlink control information
- UCI uplink control information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified 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 notifying the predetermined information or other information Notification may be performed).
- the determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.
- Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
- software, instructions, information, etc. may be sent and received via a transmission medium.
- software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- system and "network” as used herein are used interchangeably.
- base station Base Station
- radio base station eNB
- gNB gigad Generation
- cell cell
- cell group cell group
- carrier carrier
- carrier may be used interchangeably.
- a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
- a base station may accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station for indoor use (RRH: Communication service can also be provided by Remote Radio Head).
- RRH Communication service can also be provided by Remote Radio Head.
- the terms "cell” or “sector” refer to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage.
- MS mobile station
- UE user equipment
- a base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.
- Node station Node station
- NodeB NodeB
- eNodeB eNodeB
- access point access point
- transmission point reception point
- femtocell small cell, and so on.
- the mobile station may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, by those skilled in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client or some other suitable term.
- the radio base station in the present specification may be replaced with a user terminal.
- each aspect / embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
- the user terminal 20 may have a function that the above-described radio base station 10 has.
- the wordings such as "up” and “down” may be read as "side".
- the upstream channel may be read as a side channel.
- a user terminal herein may be read at a radio base station.
- the radio base station 10 may have a function that the above-described user terminal 20 has.
- the operation supposed to be performed by the base station may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may be a base station, one or more network nodes other than the base station (eg, It is apparent that this can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. but not limited thereto or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile) Communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-Wide Band), Bluetooth (registered trademark) And / or systems based on other suitable wireless communication methods and / or extended next generation systems based on these.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- any reference to an element using the designation "first”, “second” and the like as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.
- determining may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as “determining”. Also, “determination” may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as “determining” (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, “determination” may be considered as “determining” some action.
- connection refers to any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements “connected” or “connected” to each other.
- the coupling or connection between elements may be physical, logical or a combination thereof. For example, “connection” may be read as "access”.
- the radio frequency domain It can be considered as “connected” or “coupled” with one another using electromagnetic energy or the like having wavelengths in the microwave region and / or the light (both visible and invisible) regions.
- a and B are different may mean “A and B are different from each other”.
- the terms “leave”, “combined” and the like may be interpreted similarly.
Abstract
Description
<第1の実施形態>
第1の実施形態においては、NWから通知されるパラメータに基づいて、UCIの複数の候補値のうち特定候補値のリソース番号を決定し、特定候補値のリソース番号に基づいて、複数の候補値のうち他のリソース番号を決定する。
使用可能なCSインデックスの間隔を使用可能インデックス間隔Xと呼び、CSにより多重できるUEの最大数を最大UE多重数Mと呼ぶ。パラメータとして、使用可能インデックス間隔X又は最大UE多重数Mが、上位レイヤシグナリング(例えば、RRCシグナリング及び/又はブロードキャスト情報)を介してNWからUEへ通知されてもよい。CS候補セット数はMに等しい。
異なるCSを用いて(CS領域で)異なるUEの系列ベースPUCCHを多重(CDM)する(UE多重を行う)か否かが、パラメータとして、上位レイヤシグナリング(例えば、RRCシグナリング及び/又はブロードキャスト情報)を介してNWからUEへ通知されてもよい。
第2の実施形態において、CS候補セット内のCS候補は、2π/Kの間隔を有していなくてもよい。
UCI候補値とCSインデックスの関連付けにより誤り率を低減してもよい。
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9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11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)
- 上り制御情報の値に関連付けられた巡回シフトを用いて系列を送信する送信部と、
無線基地局から通知されるパラメータに基づいて、前記上り制御情報の複数の候補値のうち特定の候補値に関連付けられた巡回シフトの決定を制御し、前記決定された巡回シフトに基づいて、前記複数の候補値のうち他の候補値に関連付けられた巡回シフトの決定を制御する制御部と、を有することを特徴とするユーザ端末。 - 前記パラメータは、前記特定の候補値に関連付けられた巡回シフトの番号を含むことを特徴とする請求項1に記載のユーザ端末。
- 前記複数の候補値にそれぞれ関連付けられた複数の巡回シフトは、2πを前記複数の候補値の数で等分した複数の位相回転量にそれぞれ対応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。
- 前記パラメータは、前記系列と、他のユーザ端末から送信される系列と、を符号分割多重するか否かを示す情報を含む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。
- 複数の巡回シフトのうち、前記ユーザ端末の肯定応答に関連付けられた巡回シフトは、他のユーザ端末の肯定応答に関連付けられた巡回シフトと隣接しない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。
- ユーザ端末の無線通信方法であって、
上り制御情報の値に関連付けられた巡回シフトを用いて系列を送信する工程と、
無線基地局から通知されるパラメータに基づいて、前記上り制御情報の複数の候補値のうち特定の候補値に関連付けられた巡回シフトの決定を制御し、前記決定された巡回シフトに基づいて、前記複数の候補値のうち他の候補値に関連付けられた巡回シフトの決定を制御する工程と、を有することを特徴とする無線通信方法。
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- 2017-09-08 EP EP17924566.7A patent/EP3681061A4/en active Pending
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- 2017-09-08 CA CA3074966A patent/CA3074966A1/en active Pending
- 2017-09-08 WO PCT/JP2017/032585 patent/WO2019049346A1/ja active Application Filing
- 2017-09-08 JP JP2019540266A patent/JP7104052B2/ja active Active
- 2017-09-08 CN CN201780094663.6A patent/CN111052640B/zh active Active
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Also Published As
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JPWO2019049346A1 (ja) | 2020-10-29 |
CA3074966A1 (en) | 2019-03-14 |
JP7104052B2 (ja) | 2022-07-20 |
US20200295880A1 (en) | 2020-09-17 |
BR112020004556A2 (pt) | 2020-09-08 |
CN111052640B (zh) | 2022-12-02 |
EP3681061A1 (en) | 2020-07-15 |
CN111052640A (zh) | 2020-04-21 |
US11374695B2 (en) | 2022-06-28 |
EP3681061A4 (en) | 2021-04-28 |
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