WO2017195850A1 - 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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- WO2017195850A1 WO2017195850A1 PCT/JP2017/017777 JP2017017777W WO2017195850A1 WO 2017195850 A1 WO2017195850 A1 WO 2017195850A1 JP 2017017777 W JP2017017777 W JP 2017017777W WO 2017195850 A1 WO2017195850 A1 WO 2017195850A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/08—Upper layer protocols
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, 11 or 12
- LTE has been specified for the purpose of further widening and speeding up from LTE (also referred to as LTE Rel. 8 or 9), and LTE.
- Successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 13, 14 or Also referred to as after 15).
- CA Carrier Aggregation
- CC Component Carrier
- UE User Equipment
- DC dual connectivity
- CG Cell Group
- CC cell
- Inter-eNB CA inter-base station CA
- LTE Rel. frequency division duplex (FDD) in which downlink (DL) transmission and uplink (UL: Uplink) transmission are performed in different frequency bands, and downlink transmission and uplink transmission are in the same frequency band.
- Time Division Duplex (TDD) which is performed by switching over time, is introduced.
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- Future wireless communication systems for example, 5G, NR are expected to realize various wireless communication services to meet different requirements (for example, ultra-high speed, large capacity, ultra-low delay, etc.) Yes.
- M2M may be referred to as D2D (Device To Device), V2V (Vehicle To Vehicle), or the like depending on a device to communicate. Designing a new communication access method (New RAT (Radio Access Technology)) is being studied in order to satisfy the above-mentioned various communication requirements.
- New RAT Radio Access Technology
- TTI transmission time interval
- PUCCH also referred to as shortened PUCCH (shortened PUCCH), etc.
- PUCCH Physical Uplink Control Channel
- PUCCH Physical Uplink Control Channel
- the present invention has been made in view of such a point, and an object of the present invention is to provide a user terminal and a wireless communication method that can favorably support transmission of uplink control information even with a shortened TTI. .
- the user terminal which concerns on 1 aspect of this invention is a user terminal which communicates using shortened TTI whose transmission time interval (TTI: Transmission Time Interval) length is shorter than 1 ms, Comprising: Control which controls transmission of uplink control information And a transmission unit for transmitting the uplink control information with a predetermined shortened TTI using an uplink control channel format for a shortened TTI corresponding to a plurality of TTI lengths.
- TTI Transmission Time Interval
- transmission of uplink control information can be favorably supported even with a shortened TTI.
- FIGS. 1A to 1D are diagrams illustrating an example of the configuration of the first sPF.
- 2A and 2B are diagrams illustrating another example of the configuration of the first sPF.
- 3A to 3D are diagrams illustrating an example of the configuration of the second sPF based on PF4.
- FIG. 4 is a diagram showing a table relating to the number of PRBs used in the existing PF4.
- 5A and 5B are diagrams illustrating an example of the configuration of the second sPF based on PF5.
- FIG. 6 is a diagram illustrating an example of the PUCCH / sPUCCH transmission operation of the UE in the first embodiment.
- FIG. 7 is a diagram illustrating an example of the payload size of the sPF that can be transmitted in the first embodiment.
- FIGS. 8A and 8B are diagrams illustrating an example of the configuration of the third sPF in the case where the DMRS position differs according to the TTI length.
- 9A and 9B are diagrams illustrating another example of the configuration of the third sPF in the case where the DMRS position differs according to the TTI length.
- FIGS. 10A and 10B are diagrams illustrating an example of the configuration of the third sPF when the DMRS position is mapped to the first SC-FDMA symbol within the TTI regardless of the TTI length.
- FIG. 11 is a diagram illustrating an example of the PUCCH / sPUCCH transmission operation of the UE in the second embodiment.
- FIG. 12A and 12B are diagrams illustrating an example of the payload size of the sPF that can be transmitted in the second embodiment.
- 13A and 13B are diagrams illustrating another example of the payload size of the sPF that can be transmitted in the second embodiment.
- 14A and 14B are diagrams illustrating an example of a method for determining whether or not sPUCCH can be used according to the third embodiment.
- FIG. 15 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- FIG. 16 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment of the present invention.
- FIG. 17 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment of the present invention.
- FIG. 15 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- FIG. 16 is a diagram illustrating an example of the overall configuration of
- FIG. 18 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment of the present invention.
- FIG. 19 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment of the present invention.
- FIG. 20 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.
- uplink control information is transmitted from a UE to a network side device (for example, a base station (called eNB (eNodeB), BS (Base Station), etc.)).
- a network side device for example, a base station (called eNB (eNodeB), BS (Base Station), etc.)
- eNB eNodeB
- BS Base Station
- Uplink Control Information is fed back, and the UE may transmit UCI on the uplink shared channel (PUSCH) at the timing when uplink data transmission is scheduled.
- PUSCH uplink shared channel
- the UCI in the existing system includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), a precoding type indicator (PTI), a rank indicator (RI).
- CQI channel quality indicator
- PMI precoding matrix indicator
- PTI precoding type indicator
- RI rank indicator
- CSI Channel State Information
- CSI Channel State Information
- delivery confirmation information for downlink signals eg, downlink shared channel (PDSCH: Physical Downlink Shared Channel)
- SR Scheduling
- the acknowledgment information may be referred to as HARQ-ACK (Hybrid Automatic Repeat reQuest-Acknowledgement), ACK / NACK (A / N), retransmission control information, or the like.
- HARQ-ACK Hybrid Automatic Repeat reQuest-Acknowledgement
- ACK / NACK A / N
- retransmission control information or the like.
- periodic CSI Periodic CSI reporting in which the UE transmits CSI in a subframe of a predetermined period
- the UE receives (configures) P-CSI transmission subframe information from the eNB through higher layer signaling (for example, RRC (Radio Resource Control) signaling).
- the transmission subframe information is information indicating a subframe (also referred to as a report subframe) for transmitting P-CSI, and the period (interval) of the report subframe and the radio frame of the report subframe. And at least an offset value with respect to the head.
- the UE can transmit P-CSI in a transmission subframe having a predetermined period indicated by the transmission subframe information.
- UCI on PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- UCI on PUSCH occurs when UCI transmission and PUSCH transmission overlap in 1 TTI (for example, 1 subframe).
- UCI may be mapped to a PUCCH resource and PUCCH-PUSCH simultaneous transmission may be performed, or UCI may be mapped to a radio resource in the PUSCH region and only PUSCH may be transmitted.
- the TTI having the same 1 ms time length as that of the existing subframe may be referred to as a normal TTI (for example, a TTI in LTE Rel. 8-12).
- a normal TTI for example, a TTI in LTE Rel. 8-12.
- a TTI shorter than a normal TTI may be referred to as a shortened TTI (sTTI: shortened TTI).
- sPUCCH transmitted in a shorter period than existing PUCCH has been studied.
- the specific configuration / format of sPUCCH has not yet been studied.
- the capacity of the communication system for example, the number of multiplexed UEs
- the block error rate (BLER: Block Error Rate) of the sPUCCH, and the like will decrease.
- PF PUCCH Format
- sPF shortened PUCCH Format
- a trade-off between communication quality and overhead can be suitably taken for both a large UCI and a small UCI.
- sPF wireless communication method
- an sPF (hereinafter also referred to as a first sPF) for a relatively small payload size (eg, 1 bit, 2 bits) based on PF1 / 1a / 1b may be defined and used.
- an sPF for a relatively large payload size based on PF 4 or 5 (hereinafter also referred to as a second sPF) may be defined and used.
- the first sPF preferably supports (covers) a TTI length of 2, 3, 4 and / or 7 symbols. Since at least two symbols are preferably arranged at the same frequency, the first sPF having a TTI length of two or three symbols may not be applied with frequency hopping in the TTI. On the other hand, the first sPF having a TTI length of 4 or 7 symbols may or may not be applied with frequency hopping within the TTI.
- the symbol length may be expressed, for example, in OFDM / SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol units, or in a reciprocal number of a predetermined bandwidth (ie, sampling length). Or may be expressed in other units. The same applies to the following embodiments.
- OFDM / SC-FDMA Single Carrier Frequency Division Multiple Access
- both demodulation reference signals (DMRS: DeModulation Reference Signal) and data are mapped to the same frequency for channel estimation (coherent detection). Further, since the first sPF does not need to support many bits, the number of physical resource blocks (PRBs) used for transmission of each symbol is 1.
- PRBs physical resource blocks
- the number of UEs multiplexed by code division multiplexing (CDM) is changed (spreading factor is changed).
- CDM code division multiplexing
- the first sPF having a TTI length of 2 or 3 symbols is preferably configured to support a maximum of 12 UEs by applying CDM based on cyclic shift.
- the first sPF having a TTI length of 4 or 7 symbols is preferably configured such that CDM based on cyclic shift and orthogonal spreading code (OCC) is applied.
- the first sPF consisting of a 4-symbol TTI length including two DMRSs is configured to support 24 UEs.
- the first sPF including the TDM length of 7 symbols including two DMRSs and to which intra-TTI frequency hopping is applied is preferably configured to support 24 UEs.
- the first sPF including two DMRSs and having a TTI length of 7 symbols to which intra-TTI frequency hopping is not applied is configured to support 36 UEs.
- a block spreading code is used as the first sPF encoding method.
- transmit antenna diversity may be set for the first sPF.
- transmission antenna diversity is spatial orthogonal resource transmission diversity (SORTD: Spatial Orthogonal-Resource Transmit Diversity) using different PRBs and / or orthogonal code sequences (cyclic shift, block spreading sequence, etc.) between antennas. Also good.
- FIG. 1 is a diagram illustrating an example of the configuration of the first sPF.
- FIG. 1 shows how symbols are mapped in the time direction.
- 1A to 1D show cyclic shift and / or OCC respectively applied to data symbols mapping UCI (A / N, SR, etc.) and reference signal symbols mapping DMRS.
- the cyclic shift C may be selected from the same set regardless of the number of symbols, or may be selected from a different set according to the number of symbols. Further, the cyclic shift C may be different between the data symbol and the reference signal symbol, or may be the same.
- OCC When the number of symbols is 4 or more, OCC is applied.
- the data symbol and the reference signal symbol are respectively multiplied by the OCC AN and the OCC RS having a code length of 2.
- a code sequence of OCC AN ([W0, W1] ) and C RS code sequence ([W0, W1]) may be different, may be the same.
- an OCC AN with a code length of 4 is multiplied by a data symbol
- an OCC RS with a code length of 3 is multiplied by a reference signal symbol.
- the code sequence of OCC AN ([W0, W1, W2, W3]) and C RS code sequence ([W0, W1, W2] ), may be different, may be the same.
- FIG. 1 shows an example in which the first sPF is mapped to symbols that are continuous from the head in one slot
- the time resource to be mapped is not limited to this.
- 1 shows an example in which the leading symbol is a data symbol, the leading symbol may be a reference signal symbol, and the arrangement order of the data symbol and the reference signal symbol is not limited to this.
- the mapping configuration is not limited.
- FIG. 2 is a diagram showing another example of the configuration of the first sPF.
- FIG. 2 shows how symbols are mapped in the time direction and the frequency direction.
- a radio resource corresponding to one subframe and a system bandwidth is shown.
- FIG. 2A shows an example of a first sPF mapping pattern consisting of a 4-symbol TTI length to which intra-TTI frequency hopping is applied.
- frequency symbols at both ends of the system bandwidth are hopped by 2 symbols (1 data symbol + 1 reference signal symbol).
- FIG. 2B shows an example of a mapping pattern of the first sPF consisting of a TTI length of 7 symbols to which intra-TTI frequency hopping is applied.
- the first sPF is hopped with 4 symbols (2 data symbols + 2 reference signal symbols) and 3 symbols (2 data symbols + 1 reference signal symbols) to the frequency resources at both ends of the system bandwidth.
- either one of the time resources adjacent before and after hopping may be a reference signal symbol (FIG. 2A), both may be reference signal symbols (FIG. 2B), or both may be data symbols.
- the second sPF is based on either PF4 or 5, it is preferable to support (cover) TTI lengths of 3, 4 and 7 symbols. Also, the second sPF based on PF4 preferably supports a TTI length of 2 symbols. Note that frequency hopping in TTI may not be applied to the second sPF having a TTI length of 2 or 3 symbols. On the other hand, the second sPF having a TTI length of 4 or 7 symbols may or may not be applied with frequency hopping within the TTI.
- both DMRS and data are mapped to the same frequency for channel estimation (coherent detection).
- the second sPF based on PF4 supports multiple PRBs like PF4.
- the second sPF based on PF5 supports 1PRB like PF5.
- the second sPF based on PF4 supports only 1 UE like PF4.
- the second sPF based on PF5 supports 2UEs like PF5.
- tail biting convolutional encoding (TBCC) is used.
- transmit antenna diversity (for example, SORTD) may be set for the second sPF.
- the UE may be notified of information regarding whether to apply transmit antenna diversity for sPUCCH transmission according to the second sPF, and based on this information, the UE may determine whether to apply transmit antenna diversity.
- FIG. 3 is a diagram showing an example of the configuration of the second sPF based on PF4. Although FIG. 3 shows an example in which the second sPF is mapped to symbols that are continuous from the beginning in one slot, the time resource to be mapped is not limited to this.
- 3A to 3D show resource positions of data symbols mapping UCI (A / N, SR, CSI, etc.) and reference signal symbols mapping DMRS.
- the frequency resource (PRB) used for mapping increases as the TTI length is shorter.
- symbol mapping is performed using 4, 3, 2, and 1 PRB, corresponding to the TTI lengths of 2, 3, 4, and 7 symbols, respectively.
- UE is higher layer signaling (for example, RRC signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block), etc.)), physical layer signaling (for example, downlink control information (DCI: Downlink Control Information)) or these
- RRC signaling for example, RRC signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block), etc.)
- physical layer signaling for example, downlink control information (DCI: Downlink Control Information)
- DCI Downlink Control Information
- the information regarding the frequency resource (for example, the number of PRBs) used in the second sPF may be a predetermined index.
- FIG. 4 is a diagram showing a table relating to the number of PRBs used in the existing PF4.
- the UE sets a predetermined index (numberOfPRB-format4-r13) by higher layer signaling, and refers to the table shown in FIG. 4 to determine the number of PRBs (M RB PUCCH4 ) used in the PF4.
- the same or similar table as in FIG. 4 may be defined or set, and the UE may determine the number of PRBs based on the notified index.
- FIG. 5 is a diagram illustrating an example of the configuration of the second sPF based on PF5.
- a second sPF having a TTI length of 7 symbols is shown.
- FIG. 5A shows an example of the mapping pattern of the second sPF consisting of a TTI length of 7 symbols to which intra-TTI frequency hopping is not applied.
- the UE multiplies the generated 12 symbols by a spreading code and applies CDM.
- the spreading codes corresponding to CDM index 0 are all configured with the same positive value (for example, +1), and the spreading code corresponding to CDM index 1 has the same positive value (for example, +1) and the latter half for the first six symbols.
- Six symbols are composed of negative values (for example, -1) having the same absolute value.
- the UE After applying the CDM, the UE shall maintain single-carrier peak-to-average power ratio (PAPR) characteristics by performing discrete Fourier transform (DFT) precoding. Can do.
- DMRS is separately orthogonalized. For example, a UE assigned CDM index 0 may apply 0 as a cyclic shift to DMRS, and a UE assigned CDM index 1 may apply 6 as a cyclic shift to DMRS. Note that the value of the cyclic shift is not limited to these.
- FIG. 5B shows an example of a second sPF mapping pattern consisting of a TTI length of 7 symbols to which intra-TTI frequency hopping is applied.
- the second sPF is hopped with 4 symbols (2 data symbols + 2 reference signal symbols) and 3 symbols (2 data symbols + 1 reference signal symbols) to the frequency resources at both ends of the system bandwidth.
- the UE may use one of the second sPF based on PF4 and the second sPF based on PF5, or may switch both.
- the UE selectively uses the first sPF and the second sPF based on the payload size of the UCI (determines (determines) whether to transmit the UCI using the first sPF or the second sPF).
- FIG. 6 is a diagram illustrating an example of the PUCCH / sPUCCH transmission operation of the UE in the first embodiment.
- two subframes are shown, and sTTI is used in the first subframe, and normal TTI is used in the second subframe.
- the length of sTTI has a length of a quarter of the subframe, but is not limited to this.
- UE transmits sPUCCH according to the first sPF or the second sPF in sTTI. Moreover, UE transmits the existing PUCCH according to the existing rule (specification) in normal TTI. The UE may determine whether to apply transmission diversity to the PUCCH and / or sPUCCH based on the respective configurations.
- the sPUCCH according to the second sPF to which transmission diversity is applied is transmitted in the last sTTI, while the PUCCH according to the existing PF5 to which transmission diversity is not applied is transmitted in a normal TTI that is temporally continuous with the last sTTI.
- the switching of the TTI length is preferably dynamically controlled in units of subframes as shown in FIG. 6, but the time for the control unit is not limited to this.
- QPSK Quadrature Phase Shift Keying
- BPSK Binary Phase Shift Keying
- FIG. 7 is a diagram illustrating an example of the payload size of the sPF that can be transmitted in the first embodiment.
- the UE can transmit 1 or 2 bits regardless of the number of sTTI symbols by using 1PRB as the sPUCCH resource.
- the UE transmits a payload having a size proportional to the number of symbols (for example, 12 bits ⁇ the number of data symbols) using 1PRB as the sPUCCH resource for a TTI length larger than 2 symbols. be able to.
- the UE transmits a payload having a size proportional to the number of PRBs and the number of symbols (for example, 24 bits ⁇ the number of data symbols ⁇ the number of PRBs) using one or more PRBs as the sPUCCH resource. can do.
- an sPF to which a variable spreading factor is applied with one or more PRBs (hereinafter also referred to as a third sPF) is provided.
- the third sPF defines and uses one sPUCCH format that can support different TTI lengths.
- the third sPF can correspond to a relatively small payload size to a relatively large payload size.
- the third sPF preferably supports (covers) TTI lengths of 2, 3, 4 and 7 symbols. Since at least two symbols are preferably arranged at the same frequency, the first sPF having a TTI length of two or three symbols may not be applied with frequency hopping in the TTI. On the other hand, the first sPF having a TTI length of 4 or 7 symbols may or may not be applied with frequency hopping within the TTI.
- both DMRS and data are mapped to the same frequency for channel estimation (coherent detection).
- the DMRS position (location) may be configured to vary depending on the TTI length, or a predetermined symbol (eg, the first SC-FDMA symbol in the TTI) regardless of the TTI length. ) May be configured to be mapped.
- a predetermined symbol eg, the first SC-FDMA symbol in the TTI
- a plurality of sPUCCHs having different TTI lengths can be multiplexed on the same PRB.
- the third sPF is composed of one or a plurality of PRBs.
- the UE notifies (sets and instructs) information on frequency resources (for example, the number of PRBs) used in the third sPF by upper layer signaling (for example, RRC signaling), physical layer signaling (for example, DCI), or a combination thereof.
- SPUCCH mapping may be performed based on the information.
- the spreading factor in the symbol is variable.
- the UE may be notified (set, instructed) of information regarding the spreading factor used in the third sPF by upper layer signaling, physical layer signaling, or a combination thereof, and may map the sPUCCH based on the information. .
- a different method can be used according to the UCI payload size.
- a block code is used when the UCI payload size is 2 bits or less
- a Reed-Muller code (RM code) when it is 22 bits or less
- a TBCC is used when it is larger than 22 bits. It may be.
- transmit antenna diversity (for example, SORTD) may be set for the third sPF.
- the UE may be notified of information regarding whether or not transmission antenna diversity is applied to transmission of sPUCCH according to the third sPF, and the UE may determine whether or not transmission antenna diversity is applied based on the information.
- FIG. 8 is a diagram illustrating an example of the configuration of the third sPF when the DMRS position differs according to the TTI length.
- a configuration of an sPF having a TTI length of 3 symbols, a PRB number of 2 and a spreading factor of 2 is shown.
- the UE multiplies the generated 24 symbols by a spreading code and applies CDM.
- the spreading codes corresponding to the CDM index 0 are all configured with the same positive value (for example, +1), and the spreading code corresponding to the CDM index 1 has the same positive value (for example, +1) and the latter half for the first 12 symbols. 12 symbols are composed of negative values (for example, -1) having the same absolute value.
- UE performs DFT precoding after applying CDM.
- DMRS is separately orthogonalized.
- a UE assigned CDM index 0 may apply 0 as a cyclic shift to DMRS
- a UE assigned CDM index 1 may apply 6 as a cyclic shift to DMRS. Note that the value of the cyclic shift is not limited to these.
- FIG. 9 is a diagram illustrating another example of the configuration of the third sPF when the DMRS position differs according to the TTI length.
- an sPF configuration with a TTI length of 7 symbols (no frequency hopping within TTI), a PRB number of 2 and a spreading factor of 4 is shown.
- the DMRS position is the third symbol from the beginning in one slot
- the DMRS position is the fourth symbol from the beginning in one slot
- the DMRS position has a TTI length. Depending on it.
- the UE multiplies the generated 24 symbols by a spreading code and applies CDM.
- the spreading codes corresponding to the CDM indexes 0-3 are configured to be orthogonal to each other.
- the UE performs DFT precoding after applying the CDM.
- DMRS is orthogonalized separately from data symbols.
- UEs assigned CDM indexes 0, 1, 2, and 3 may apply 0, 6, 3, and 9 as cyclic shifts to DMRS, respectively. Note that the value of the cyclic shift is not limited to these.
- FIG. 10 is a diagram illustrating an example of the configuration of the third sPF when the DMRS position is mapped to the first SC-FDMA symbol within the TTI regardless of the TTI length.
- FIG. 10 illustrates an example in which sPUCCHs according to sPFs having different TTI lengths are multiplexed on the same PRB.
- an sPF configuration with a TTI length of 2 symbols, a PRB number of 2 and a spreading factor of 2 are shown.
- one or more UEs can transmit sPUCCHs with different TTI lengths in the same slot, and the base station The sPUCCH can be separated and decoded. Since the UE's sPUCCH transmission processing (DFT precoding, etc.) is the same as in FIGS.
- FIG. 11 is a diagram illustrating an example of the PUCCH / sPUCCH transmission operation of the UE in the second embodiment.
- sTTI is used in the first subframe
- normal TTI is used in the second subframe.
- the length of sTTI has a length of a quarter of the subframe, but is not limited to this.
- UE transmits sPUCCH based on information notified / set / instructed in sTTI (for example, information on spreading factor, number of PRBs, transmission diversity). Moreover, UE transmits the existing PUCCH according to the existing rule (specification) in normal TTI. UE determines whether transmission diversity is applied to PUCCH and / or sPUCCH based on each structure.
- the sPUCCH according to the third sPF to which transmission diversity is applied is transmitted in the last sTTI, while the PUCCH according to the existing PF4 to which transmission diversity is not applied is transmitted in a normal TTI that is temporally continuous with the last sTTI.
- the switching of the TTI length is preferably controlled dynamically in units of subframes, but the time for the control unit is not limited to this.
- QPSK may be used as the modulation method.
- BPSK BPSK
- FIG. 12 is a diagram illustrating an example of the payload size of the sPF that can be transmitted in the second embodiment.
- FIG. 13 is a diagram illustrating another example of the payload size of the sPF that can be transmitted in the second embodiment.
- the UE uses one or more PRBs as sPUCCH resources, and is proportional to the number of PRBs and the number of symbols and inversely proportional to the spreading factor (for example, 24 bits ⁇ the number of data symbols ⁇ the number of PRBs / spreading). Rate) payload.
- the spreading factor is 12 and 1PRB is used as the sPUCCH resource, 1 or 2 bits may be transmitted.
- the example in which the number of symbols supported by the sPF is 2, 3, 4 and 7, but the set of the number of symbols supported by the sPF is not limited to this.
- at least one of the first to third sPFs may include a configuration that supports a number of symbols greater than 7 symbols and less than 14 symbols.
- the third embodiment relates to a method in which a UE determines which of sPUCCH and existing PUCCH is used when A / N is included in UCI.
- FIG. 14 is a diagram illustrating an example of a method for determining whether to use sPUCCH according to the third embodiment.
- the UE uses the TTI length (that is, the existing PF) used for transmission of the A / N based on predetermined information regardless of whether DL data related to A / N is normally transmitted by TTI or sTTI. Or according to sPF) (FIG. 14A).
- the data channel transmitted by sTTI may be called sPDSCH (shortened PDSCH).
- the UE is explicitly notified (configured or instructed) about the uplink control channel format used for UCI (A / N) transmission by higher layer signaling, physical layer signaling, or a combination thereof.
- the TTI length used for UCI transmission may be determined, and UCI mapping may be performed.
- the information may be information indicating whether to use sPUCCH or existing PUCCH, may be information indicating a TTI length used for UCI transmission, or may be a radio resource (for example, UCI transmission) , Time resources).
- a UE that has received either sPDSCH or existing PDSCH can change the corresponding UCI (A / N) to sPUCCH or existing PUCCH based on signaling. It is possible to dynamically determine which of the transmission is performed. Thereby, flexible scheduling becomes possible.
- the UE implicitly determines the TTI length used for transmission of the A / N (that is, whether to follow existing PF or sPF). (FIG. 14B).
- the UE when receiving the sPDSCH, the UE can dynamically determine that the corresponding UCI (A / N) is transmitted using the sPUCCH. Further, when the UE receives the existing PDSCH, the UE can dynamically determine that the corresponding UCI (A / N) is transmitted using the existing PUCCH. Thereby, it is possible to perform communication using the shortened TTI while suppressing an increase in overhead.
- a / N and UL-SCH occur in the same carrier and the same sTTI, A / N transmission resources are determined based on either rule (1) or (2) below. Also good.
- the A / N may be transmitted (piggyback) on the UL-SCH.
- a / N is transmitted by sPUSCH.
- a / N is transmitted on the existing PUSCH.
- a / N may be transmitted using sPUCCH or existing PUCCH. In this case, A / N is not transmitted on the PUSCH. Whether the A / N transmission is based on sPF or an existing PF is implicitly determined based on the TTI length of the UL-SCH transmitted at the same time.
- a / N is transmitted by sPUCCH.
- the A / N is transmitted using the existing PUCCH.
- sPUCCH and PUSCH are transmitted at the same time, or sPUSCH and PUCCH are transmitted at the same time, thereby preventing a situation where a plurality of channels are simultaneously transmitted with different TTI lengths. Can be sent.
- an appropriate channel for transmitting UCI can be determined based on predetermined information or the TTI length of the received data channel.
- the fourth embodiment relates to specific information included in UCI transmitted on sPUCCH and transmission resources of sPUCCH.
- the UCI transmitted using the first sPF shown in the first embodiment includes a scheduling request (1 bit) and / or HARQ-ACK (1 or 2 bits).
- HARQ-ACK when CA is not applied may be configured to include one bit for each transport block (TB) of a predetermined CC.
- the HARQ-ACK when CA is applied may be configured such that all CCs are bundled (logically ORed) for each TB, and HARQ-ACK (1 bit) for each TB is included.
- HARQ-ACK results in 2 bits.
- TM1 / 2/5/6/7 is set for all CCs, HARQ-ACK is 1 bit as a result.
- HARQ-ACK when CA is applied may be configured such that all TBs are bundled (logically ORed) for each CC, and HARQ-ACK (1 bit) for each CC is included. In this case, HARQ-ACK up to 2 CC can be transmitted in the first sPF.
- the UCI includes both SR and HARQ-ACK
- the SR is transmitted using the sPUCCH resource set for HARQ-ACK.
- the UCI transmitted using the second sPF shown in the first embodiment includes at least one of a scheduling request, HARQ-ACK for one or more CCs, and P-CSI for one or more CCs.
- the UCI When the UCI includes SR and HARQ-ACK, the UCI is transmitted using the sPUCCH resource set for HARQ-ACK.
- the UCI When the UCI includes SR and P-CSI, the UCI is transmitted using the sPUCCH resource set for P-CSI.
- the UCI When the UCI includes HARQ-ACK and P-CSI, the UCI is transmitted using the sPUCCH resource set for HARQ-ACK.
- the UCI When the UCI includes SR, HARQ-ACK, and P-CSI, it is transmitted using the sPUCCH resource set for HARQ-ACK.
- the UE drops one or more P-CSIs and sets the resulting UCI coding rate. You may control so that it may become below the said predetermined threshold value (or less). Note that the information on the predetermined threshold may be notified (set) to the UE by higher layer signaling, physical layer signaling, or a combination thereof.
- the UCI including only the positive SR may be transmitted according to either the first sPF or the existing PF.
- the UCI transmitted using the third sPF shown in the second embodiment is the information described above for the UCI transmitted using the first sPF and / or the UCI transmitted using the second sPF. Or the transmission resource may be determined according to the rules described above. For the transmission of UCI according to the third sPF, for example, at least one of the sPUCCH resource described for the first sPF or the sPUCCH resource described for the second sPF may be used according to the size of the UCI payload.
- the UE is notified (set, instructed) of information on the sPUCCH resource by higher layer signaling, physical layer signaling, or a combination thereof, and determines the sPUCCH resource based on the information. It is good. For example, the UE sets information related to the correspondence relationship between the sPUCCH resource and a predetermined index by higher layer signaling (for example, RRC signaling), and the sPUCCH resource is based on the index indicated by the physical layer signaling and the correspondence relationship. May be determined.
- higher layer signaling for example, RRC signaling
- the UE can transmit various UCIs using appropriate sPUCCH resources.
- 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. 15 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), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced 4G (4th generation mobile communication system)
- 5G. 5th generation mobile communication system
- FRA Full Radio Access
- New-RAT Radio Access Technology
- 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 simultaneously by 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 (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.
- a wired connection for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, etc.
- a wireless connection It can be set as the structure to do.
- 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
- 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 scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
- 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. Also, 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 scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) acknowledgment 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) is used.
- PUSCH uplink shared channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- User data and higher layer control information are transmitted by PUSCH.
- downlink radio quality information CQI: Channel Quality Indicator
- delivery confirmation information and the like are transmitted by PUCCH.
- a random access preamble for establishing connection with a 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. 16 is a diagram illustrating an example of the 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 processing unit 105 performs call processing such as communication channel setting and release, state management of the radio base station 10, and radio resource management.
- 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 transmits PDSCH, sPDSCH, and the like to the user terminal 20.
- the transmission / reception unit 103 receives PUCCH, sPUCCH, and the like from the user terminal 20.
- the transmission / reception unit 103 provides the user terminal 20 with information on frequency resources used in at least one of the first, second, and third sPFs, information on spreading factors used in the third sPFs, predetermined Information regarding whether or not transmission antenna diversity is applied to the sPF may be transmitted.
- FIG. 17 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment of the present invention.
- the functional block of the characteristic part in this embodiment is mainly shown, and the wireless base station 10 shall also have another functional block required for radio
- 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 signal generation by the transmission signal generation unit 302 and signal allocation by the mapping unit 303, for example.
- the control unit 301 also controls signal reception processing by the reception signal processing unit 304 and signal measurement by the measurement unit 305.
- the control unit 301 controls scheduling (for example, resource allocation) of system information, a downlink data signal transmitted on the PDSCH, and a downlink control signal transmitted on the PDCCH and / or EPDCCH. Further, the control unit 301 controls generation of a downlink control signal (for example, delivery confirmation information) and a downlink data signal based on a result of determining whether or not retransmission control is necessary for the uplink data signal.
- the control unit 301 also controls scheduling of synchronization signals (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)) and downlink reference signals such as CRS, CSI-RS, and DMRS.
- the control unit 301 also includes an uplink data signal transmitted on the PUSCH, an uplink control signal (eg, delivery confirmation information) transmitted on the PUCCH and / or PUSCH, a random access preamble transmitted on the PRACH, an uplink reference signal, etc. Control the scheduling of
- control unit 301 When the control unit 301 acquires the UCI received from the user terminal 20 from the reception signal processing unit 304, the control unit 301 performs data retransmission control and scheduling control on the user terminal 20 based on the UCI. For example, when acquiring the HARQ-ACK from the reception signal processing unit 304, the control unit 301 determines whether or not retransmission to the user terminal 20 is necessary, and controls to perform retransmission processing if necessary.
- the control unit 301 performs control so that communication is performed using sTTI having a TTI length shorter than 1 ms (existing subframe).
- the control unit 401 assumes a predetermined TTI uplink control channel format (for example, at least one of the first sPF, the second sPF, and the third sPF) corresponding to a plurality of TTI lengths. It controls to receive UCI (sPUCCH) with sTTI.
- the control unit 301 notifies (sets) information related to the sPF used for UCI transmission to the user terminal 20 so that the user terminal 20 transmits UCI using sPUCCH according to sPF with a predetermined sTTI. You may control.
- 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 that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information based on an instruction from the control unit 301.
- 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 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, for example, receive power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)) or channel of the received signal. You may measure about a state etc.
- the measurement result may be output to the control unit 301.
- FIG. 18 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. Of the downlink data, broadcast information is also 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 by performing retransmission control transmission processing (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like. Is transferred to the unit 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 transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- the transmission / reception unit 203 receives PDSCH, sPDSCH, and the like from the radio base station 10.
- the transmission / reception unit 203 transmits PUCCH, sPUCCH, and the like to the radio base station 10.
- the transceiver unit 203 receives information from the radio base station 10 regarding frequency resources used in at least one of the first, second, and third sPF, information regarding a spreading factor used in the third sPF, and a predetermined sPF. For example, information regarding whether or not transmission antenna diversity is applied may be received.
- FIG. 19 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment of the present invention.
- the functional blocks of the characteristic part in the present embodiment are mainly shown, and 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 by the transmission signal generation unit 402 and signal allocation by the mapping unit 403.
- the control unit 401 controls signal reception processing by the reception signal processing unit 404 and signal measurement by the measurement unit 405.
- the control unit 401 obtains, from the received signal processing unit 404, a downlink control signal (a signal transmitted by PDCCH / EPDCCH) and a downlink data signal (a signal transmitted by PDSCH) transmitted from the radio base station 10.
- the control unit 401 controls generation of an uplink control signal (for example, delivery confirmation information) and an uplink data signal based on a downlink control signal, a result of determining whether or not retransmission control is required for the downlink data signal, and the like.
- the control unit 401 controls to perform communication using sTTI having a TTI length shorter than 1 ms (existing subframe). For example, the control unit 401 uses a predetermined TTI uplink control channel format corresponding to a plurality of TTI lengths (for example, at least one of the first sPF, the second sPF, and the third sPF), and performs predetermined processing. It controls to transmit UCI (sPUCCH) by sTTI.
- sTTI having a TTI length shorter than 1 ms (existing subframe).
- the control unit 401 uses a predetermined TTI uplink control channel format corresponding to a plurality of TTI lengths (for example, at least one of the first sPF, the second sPF, and the third sPF), and performs predetermined processing. It controls to transmit UCI (sPUCCH) by sTTI.
- UCI sPUCCH
- the control unit 401 Based on the size of UCI (for example, payload size), the control unit 401 selects either a relatively small payload size format (first sPF) or a relatively large payload size format (second sPF). May be controlled to transmit UCI using sPF.
- first sPF relatively small payload size format
- second sPF relatively large payload size format
- the control unit 401 may perform control so that UCI is transmitted using a single format (third sPF) in which both the spreading factor in the symbol and the number of physical resource blocks are variable as the sPF.
- the control unit 401 transmits the sPUCCH according to the second sPF, even if the predetermined sTTI has a first TTI length (for example, two symbols), the second 401 different from the first TTI length is used. Even in the case of having a TTI length (for example, 3 symbols), the DMRS may be controlled to be mapped to the same radio resource (for example, the first symbol in one slot).
- control unit 401 may perform control so as to transmit UCI by applying transmission diversity with the predetermined sTTI based on information notified from the radio base station 10.
- control unit 401 may determine whether to perform UCI transmission using sPUCCH in sTTI or normal PTI using PUCCH based on information notified from the radio base station 10. In addition, the control unit 401 transmits UCI (for example, A / N to be transmitted according to the DL data) based on the TTI length used for receiving a predetermined DL signal (for example, DL data) using sTTI. It may be determined whether to use sPUCCH or to use PUCCH in normal TTI.
- 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, 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 generator 402 generates an uplink control signal related to delivery confirmation information and channel state information (CSI) based on an instruction from the controller 401, for example.
- the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401.
- 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.
- 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 the signal after reception processing to the measurement unit 405.
- the measurement unit 405 performs measurement on the received signal.
- the measurement unit 405 performs measurement using the beam forming RS transmitted from the radio base station 10.
- 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 measure, for example, the received power (for example, RSRP), reception quality (for example, RSRQ, received SINR), channel state, and the like of the received signal.
- the measurement result may be output to the control unit 401.
- each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
- 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. 20 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 reads predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs computation and communication by the communication device 1004.
- predetermined software program
- it is realized by controlling data reading and / or writing in the memory 1002 and the storage 1003.
- the processor 1001 controls the entire computer by operating an operating system, for example.
- the processor 1001 may be configured by a central processing unit (CPU) including 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 like data
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, 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).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
- the radio base station 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 by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.
- DSP digital signal processor
- ASIC Application Specific 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 with 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 slot may be configured with one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the radio frame, subframe, slot, and symbol all represent a time unit when transmitting a signal.
- Different names may be used for the radio frame, the subframe, the slot, and the symbol.
- one subframe may be referred to as a transmission time interval (TTI)
- a plurality of consecutive subframes may be referred to as a TTI
- one slot may be referred to as a TTI.
- the subframe or TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Also good.
- TTI means, for example, a minimum time unit for scheduling in wireless communication.
- a radio base station performs scheduling to allocate 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), or may be a processing unit such as scheduling or link adaptation.
- 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.
- TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a shortened subframe, a short subframe, or the like.
- 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 one slot, one subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
- the RB may be called a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, or the like.
- the resource block may be composed of 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, symbol, and the like is merely an example.
- the configuration such as the cyclic prefix (CP) length can be changed in various ways.
- information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information.
- the radio resource may be indicated by a predetermined index.
- mathematical formulas and the like using these parameters may differ from those explicitly disclosed herein.
- PUCCH Physical Uplink Control Channel
- PDCCH Physical Downlink Control Channel
- information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
- the name is not limiting 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 by 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 by, for example, a MAC control element (MAC CE (Control Element)).
- notification of predetermined information is not limited to explicitly performed, but implicitly (for example, by not performing notification of the predetermined information or another (By notification of information).
- 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
- cell e.g., a fixed station
- eNodeB eNodeB
- cell group e.g., a cell
- carrier femtocell
- component carrier e.g., 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 specific operation assumed to be performed by the base station may be performed by the upper node in some cases.
- various operations performed for communication with a terminal may be performed by one or more network nodes other than the base station and 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, 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 herein 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), The present invention may be applied to a system using other appropriate wireless communication methods and / or a next generation system extended based on these.
- 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.
- the terms “connected”, “coupled”, or any variation thereof refers to 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.
- the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
- electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
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Abstract
Description
<第1の実施形態>
第1の実施形態では、それぞれ異なるTTI長に対応できる複数(例えば、2つ)のsPFを規定して用いる。これらのsPFは、既存のPFをベースに構成されることが好ましい。
第1のsPFは、2、3、4及び/又は7シンボルのTTI長をサポート(カバー)することが好ましい。なお、少なくとも2シンボルは同じ周波数に配置されることが好ましいため、2又は3シンボルのTTI長から成る第1のsPFは、TTI内の周波数ホッピングが適用されなくてもよい。一方で、4又は7シンボルのTTI長から成る第1のsPFは、TTI内の周波数ホッピングが適用されてもよいし、適用されなくてもよい。
第2のsPFは、PF4又は5のいずれをベースとするものであっても、3、4及び7シンボルのTTI長をサポート(カバー)することが好ましい。また、PF4ベースの第2のsPFは、2シンボルのTTI長をサポートすることが好ましい。なお、2又は3シンボルのTTI長から成る第2のsPFは、TTI内の周波数ホッピングが適用されなくてもよい。一方で、4又は7シンボルのTTI長から成る第2のsPFは、TTI内の周波数ホッピングが適用されてもよいし、適用されなくてもよい。
UEは、UCIのペイロードサイズに基づいて、第1のsPF及び第2のsPFを使い分ける(第1のsPF及び第2のsPFのいずれを用いてUCIを送信するかを判断(決定)する)。
第2の実施形態では、1以上のPRBで可変の拡散率が適用されるsPF(以下、第3のsPFともいう)を提供する。第3のsPFは、異なるTTI長に対応できる1つのsPUCCHフォーマットを規定して用いる。また、第3のsPFは、比較的小さなペイロードサイズから比較的大きなペイロードサイズまで対応することができる。
第3のsPFは、2、3、4及び7シンボルのTTI長をサポート(カバー)することが好ましい。なお、少なくとも2シンボルは同じ周波数に配置されることが好ましいため、2又は3シンボルのTTI長から成る第1のsPFは、TTI内の周波数ホッピングが適用されなくてもよい。一方で、4又は7シンボルのTTI長から成る第1のsPFは、TTI内の周波数ホッピングが適用されてもよいし、適用されなくてもよい。
図11は、第2の実施形態におけるUEのPUCCH/sPUCCH送信動作の一例を示す図である。図11では2つのサブフレームが示されており、1番目のサブフレームではsTTIが用いられ、2番目のサブフレームでは通常TTIが用いられる。本例では、sTTIの長さはサブフレームの4分の1の長さを有しているが、これに限られるものではない。
第3の実施形態は、UCIにA/Nを含む場合に、sPUCCH及び既存のPUCCHのいずれを用いるかをUEが判断する方法に関する。
第4の実施形態は、sPUCCHで送信するUCIに含まれる具体的な情報及びsPUCCHの送信リソースに関する。
第1の実施形態で示した第1のsPFを用いて送信されるUCIは、スケジューリングリクエスト(1ビット)及び/又はHARQ-ACK(1又は2ビット)を含む。
第1の実施形態で示した第2のsPFを用いて送信されるUCIは、スケジューリングリクエスト、1つ以上のCCに関するHARQ-ACK及び1つ以上のCCに関するP-CSIの少なくとも1つを含む。
第2の実施形態で示した第3のsPFを用いて送信されるUCIは、第1のsPFを用いて送信されるUCI及び/又は第2のsPFを用いて送信されるUCIについて上述した情報を含んでもよいし、上述した規則に従って送信リソースが決定されてもよい。第3のsPFに従うUCIの送信には、例えば、UCIペイロードのサイズに応じて、第1のsPFについて説明したsPUCCHリソース又は第2のsPFについて説明したsPUCCHリソースの少なくとも1つが用いられてもよい。
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16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18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手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
なお、本明細書で説明した用語及び/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 (7)
- 送信時間間隔(TTI:Transmission Time Interval)長が1msより短い短縮TTIを利用して通信を行うユーザ端末であって、
上り制御情報の送信を制御する制御部と、
複数のTTI長に対応した短縮TTI用の上り制御チャネルフォーマットを用いて、所定の短縮TTIで前記上り制御情報を送信する送信部と、を有することを特徴とするユーザ端末。 - 前記制御部は、前記上り制御情報のサイズに基づいて、比較的小さなペイロードサイズ向けのフォーマット及び比較的大きなペイロードサイズ向けのフォーマットのいずれかを、前記上り制御チャネルフォーマットとして用いて前記上り制御情報を送信するように制御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、シンボル内の拡散率及び物理リソースブロック数の両方が可変な単一のフォーマットを、前記上り制御チャネルフォーマットとして用いて前記上り制御情報を送信するように制御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、前記所定の短縮TTIが第1のTTI長を有する場合及び第2のTTI長を有する場合の両方で、同じ無線リソースに復調用参照信号をマッピングするように制御することを特徴とする請求項3に記載のユーザ端末。
- 前記制御部は、前記所定の短縮TTIで送信ダイバーシチを適用して前記上り制御情報を送信するように制御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。
- 前記制御部は、上り制御情報の送信に用いる上り制御チャネルフォーマットに関する情報に基づいて、前記上り制御情報の送信に用いるTTI長を判断することを特徴とする請求項1から請求項5のいずれかに記載のユーザ端末。
- 送信時間間隔(TTI:Transmission Time Interval)長が1msより短い短縮TTIを利用して通信を行うユーザ端末の無線通信方法であって、
上り制御情報の送信を制御する工程と、
複数のTTI長に対応した短縮TTI用の上り制御チャネルフォーマットを用いて、所定の短縮TTIで前記上り制御情報を送信する工程と、を有することを特徴とする無線通信方法。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019193721A1 (ja) * | 2018-04-05 | 2019-10-10 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017209555A1 (ko) * | 2016-06-03 | 2017-12-07 | 엘지전자(주) | 무선 통신 시스템에서 상향링크 제어 채널을 전송하는 방법 및 이를 위한 장치 |
US10568118B2 (en) * | 2017-07-12 | 2020-02-18 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting control and data signals based on a short TTI in a wireless cellular communication system |
US20190052406A1 (en) * | 2017-08-11 | 2019-02-14 | Mediatek Inc. | Transmission For Ultra-Reliable And Low-Latency Communications In Mobile Communications |
Family Cites Families (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101940046B (zh) * | 2008-02-04 | 2015-07-22 | 诺基亚通信公司 | 将循环移位映射到用于ack/nack资源分配的信道索引 |
CN101645868B (zh) * | 2009-08-31 | 2014-12-10 | 中兴通讯股份有限公司 | 一种参考信号的发送方法和装置 |
KR101787097B1 (ko) * | 2009-11-18 | 2017-10-19 | 엘지전자 주식회사 | 무선 통신 시스템에서 harq 수행 방법 및 장치 |
CN102696193B (zh) * | 2010-01-07 | 2016-08-10 | Lg电子株式会社 | 在无线通信系统中生成参考信号序列的方法和装置 |
WO2011085159A2 (en) * | 2010-01-08 | 2011-07-14 | Interdigital Patent Holdings, Inc. | Method and apparatus for channel resource mapping in carrier aggregation |
CN102696209B (zh) * | 2010-01-08 | 2015-06-03 | 富士通株式会社 | 正交掩码生成装置、解调参考信号生成装置和方法 |
KR101753586B1 (ko) * | 2010-02-03 | 2017-07-04 | 엘지전자 주식회사 | 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치 |
JP5995850B2 (ja) * | 2010-09-29 | 2016-09-21 | エルジー エレクトロニクス インコーポレイティド | 多重アンテナ支援無線通信システムにおいて効率的なフィードバック方法及び装置 |
CN102546134B (zh) * | 2011-12-29 | 2015-07-22 | 电信科学技术研究院 | 基于增强phich传输反馈信息的方法及装置 |
US9844036B2 (en) * | 2013-01-02 | 2017-12-12 | Lg Electronics Inc. | Data transmission method for terminal in a wireless communication system, and terminal using the method |
CN103973392B (zh) * | 2013-01-24 | 2018-12-21 | 中兴通讯股份有限公司 | 参数发送方法和装置、上行解调参考信号发射方法和装置 |
CN104284423B (zh) * | 2013-07-05 | 2019-06-07 | 株式会社Ntt都科摩 | 移动通信方法、无线基站和移动台 |
US10327258B2 (en) * | 2014-07-28 | 2019-06-18 | Lg Electronics Inc. | Method and user equipment for receiving downlink control information, and method and base station for transmitting downlink control information |
JP6789211B2 (ja) * | 2014-09-08 | 2020-11-25 | インターデイジタル パテント ホールディングス インコーポレイテッド | 異なる送信時間間隔(tti)持続時間により動作するシステムおよび方法 |
US10348477B2 (en) * | 2014-10-24 | 2019-07-09 | Lg Electronics | Method for transmitting uplink channel and demodulation reference signal by MTC device |
KR102201284B1 (ko) * | 2014-12-08 | 2021-01-11 | 엘지전자 주식회사 | 5개를 초과하는 셀들을 반송파 집성에 따라 사용할 때의 pucch 전송 방법 및 사용자 장치 |
CN107113147B (zh) * | 2014-12-31 | 2020-11-06 | Lg电子株式会社 | 在无线通信系统中分配资源的方法和设备 |
JP6526207B2 (ja) * | 2015-01-13 | 2019-06-05 | エルジー エレクトロニクス インコーポレイティド | 上りリンク信号を送信する方法及び使用者器機、並びに上りリンク信号を受信する方法及び基地局 |
WO2016163738A1 (ko) * | 2015-04-06 | 2016-10-13 | 엘지전자 주식회사 | 무선 통신 시스템에서 공유 자원 기반의 신호 송수신 방법 및 이를 위한 장치 |
US10455600B2 (en) * | 2015-04-08 | 2019-10-22 | Lg Electronics Inc. | Method for transmitting and receiving data in wireless communication system and apparatus for the same |
US10326493B2 (en) * | 2015-05-13 | 2019-06-18 | Samsung Electronics Co., Ltd. | Control channel transmission and frequency error correction |
US10637701B2 (en) * | 2015-06-04 | 2020-04-28 | Electronics And Telecommunications Research Institute | Method and apparatus for transmitting physical uplink control channel |
CN107852318B (zh) * | 2015-08-12 | 2021-07-30 | Lg电子株式会社 | 用于执行上行链路传输的方法和用户设备 |
US10461908B2 (en) * | 2015-11-11 | 2019-10-29 | Qualcomm Incorporated | Techniques for providing channels in low latency LTE wireless communications |
US9854569B2 (en) * | 2015-12-07 | 2017-12-26 | Telefonaktiebolaget L M Ericsson (Publ) | Uplink control channel configuration for unlicensed carriers |
US10615925B2 (en) * | 2015-12-10 | 2020-04-07 | Lg Electronics Inc. | Method for transmitting uplink signals in wireless communication system for supporting short transmission time interval, and device for supporting same |
EP3393070B1 (en) * | 2015-12-17 | 2020-09-09 | LG Electronics Inc. -1- | Uplink reference signal transmitting or receiving method in wireless communication system, and apparatus therefor |
KR101927368B1 (ko) * | 2016-02-02 | 2018-12-10 | 엘지전자 주식회사 | 상향링크 제어 채널 전송 방법 및 이를 수행하는 사용자 장치 |
US20170223695A1 (en) * | 2016-02-03 | 2017-08-03 | Lg Electronics Inc. | Method and apparatus for transmitting an uplink channel in a wireless communication system |
US10085256B2 (en) * | 2016-02-16 | 2018-09-25 | Qualcomm Incorporated | Downlink operations with shortened transmission time intervals |
CN107302783B (zh) * | 2016-04-15 | 2019-12-10 | 北京佰才邦技术有限公司 | 一种服务提供商标识指示方法、装置和相关设备 |
EP3446425B1 (en) * | 2016-04-20 | 2024-02-21 | InterDigital Patent Holdings, Inc. | Physical channels in new radio |
US20170325216A1 (en) * | 2016-05-09 | 2017-11-09 | Sharp Laboratories Of America, Inc. | User equipments, base stations and methods |
EP3454514B1 (en) * | 2016-05-11 | 2020-07-15 | Huawei Technologies Co., Ltd. | Signal transmission method, sending end and receiving end |
CN109155690B (zh) * | 2016-05-13 | 2021-07-02 | 瑞典爱立信有限公司 | 自适应传输时间间隔长度 |
KR20190017994A (ko) * | 2016-06-15 | 2019-02-20 | 콘비다 와이어리스, 엘엘씨 | 새로운 라디오를 위한 업로드 제어 시그널링 |
WO2018029363A1 (en) * | 2016-08-12 | 2018-02-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Uplink control signaling on pusch with shortened transmission time interval (tti) |
EP3985897A1 (en) * | 2016-09-30 | 2022-04-20 | Telefonaktiebolaget LM Ericsson (publ) | Control information mcs offset determination for uci on pusch with shortened tti |
WO2018175801A1 (en) * | 2017-03-24 | 2018-09-27 | Intel IP Corporation | New radio (nr) short and long duration physical uplink control channel (pucch) design |
-
2017
- 2017-05-11 BR BR112018072937-0A patent/BR112018072937A2/pt unknown
- 2017-05-11 CA CA3022919A patent/CA3022919C/en active Active
- 2017-05-11 US US16/300,392 patent/US10778485B2/en active Active
- 2017-05-11 JP JP2018517068A patent/JPWO2017195850A1/ja active Pending
- 2017-05-11 EP EP17796208.1A patent/EP3457742A4/en not_active Ceased
- 2017-05-11 CN CN201780029403.0A patent/CN109155938B/zh active Active
- 2017-05-11 WO PCT/JP2017/017777 patent/WO2017195850A1/ja unknown
-
2018
- 2018-11-06 PH PH12018502335A patent/PH12018502335A1/en unknown
-
2022
- 2022-04-20 JP JP2022069415A patent/JP2022106810A/ja active Pending
Non-Patent Citations (4)
Title |
---|
ERICSSON: "Physical layer aspects for PUCCH for short TTI", 3GPP TSG-RAN WG1#84B R1-163321, 11 April 2016 (2016-04-11), XP051079811, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg-ran/WG1-RL1/TSGR1_84b/Docs/Rl-163321.zip> * |
LG ELECTRONICS: "Discussion on PUCCH design for HARQ-ACK in shortened TTI", 3GPP TSG-RAN WG1#84B R1-162507, 11 April 2016 (2016-04-11), XP051080243, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_84b/Docs/R1-162507.zip> * |
NTT DOCOMO; INC: "WF on another new PUCCH format including CDM", 3GPP TSG-RAN WG1#82B R1-156125, 5 October 2015 (2015-10-05), XP051044626, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg-ran/WG1-RL1/TSGR1-82b/Docs/Rl-156125.zip> * |
ZTE: "Remaining issues on new PUCCH formats design", 3GPP TSG-RAN WG1#83 R1-156654, 15 November 2015 (2015-11-15), XP051003053, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR183/Docs/R1-156654.zip> * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019193721A1 (ja) * | 2018-04-05 | 2019-10-10 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
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