WO2016159230A1 - ユーザ端末、無線基地局及び無線通信方法 - Google Patents
ユーザ端末、無線基地局及び無線通信方法 Download PDFInfo
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- WO2016159230A1 WO2016159230A1 PCT/JP2016/060649 JP2016060649W WO2016159230A1 WO 2016159230 A1 WO2016159230 A1 WO 2016159230A1 JP 2016060649 W JP2016060649 W JP 2016060649W WO 2016159230 A1 WO2016159230 A1 WO 2016159230A1
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- transmission
- user terminal
- cell group
- control information
- uplink control
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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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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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
- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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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) or DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or 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
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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 signalling, 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
- 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 signalling, 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
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a user terminal, a radio base station, and a radio communication method in a next-generation mobile communication system.
- LTE Long Term Evolution
- Non-Patent Document 1 a LTE successor system (also referred to as LTE-A) called LTE Advanced has been studied for the purpose of further broadbanding and speeding up from LTE, and LTE Rel. It is specified as 10-12.
- the system band 10-12 includes at least one component carrier (CC: Component Carrier) having the system band of the LTE system as a unit.
- CC Component Carrier
- CA Carrier Aggregation
- uplink control information (UCI) transmitted from the user terminal is transmitted on an uplink control channel (PUCCH). Further, if transmission of PUCCH and PUSCH occurs when simultaneous transmission of the uplink control channel and the uplink shared channel (PUSCH) is not set, all uplink control information is multiplexed (Piggyback) on the PUSCH.
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the present invention has been made in view of such a point, and even when it is possible to set transmission of uplink control information using a secondary cell (SCell), a user terminal capable of appropriately performing UL transmission,
- SCell secondary cell
- An object is to provide a radio base station and a radio communication method.
- the user terminal of the present invention is a user terminal that communicates with a radio base station using carrier aggregation, and is generated based on a reception unit that receives a DL signal transmitted from the radio base station, and the received DL signal
- a plurality of cell groups each including at least one component carrier (CC) having a transmission unit that transmits uplink control information and a control unit that controls transmission of uplink control information
- CC component carrier
- UL transmission can be appropriately performed even when transmission of uplink control information using a secondary cell (SCell) can be set.
- SCell secondary cell
- Rel It is a figure which shows an example of the allocation method of the uplink control information before 12th. It is a figure which shows an example of PUCCH-PUSCH simultaneous transmission. It is a figure which shows an example in the case of controlling PUCCH transmission for every cell group. It is a figure which shows an example of the transmission method of the uplink control information in a 1st aspect. It is a figure which shows the other example of the transmission method of the uplink control information in a 1st aspect. It is a figure explaining DAI. It is a figure which shows the other example of the transmission method of the uplink control information in a 1st aspect. It is a figure which shows an example which controls transmission of the uplink control information using PUSCH between cell groups.
- FIG. 10 is a diagram illustrating an example of a transmission method of uplink control information (UCI) in 10-12.
- FIG. FIG. 1A shows a UCI multiplexing method when there is no uplink data transmission instruction (PUSCH transmission)
- FIG. 1B shows a UCI multiplexing method when there is an uplink data transmission instruction.
- 5CC (1 PCell and 4 SCell) is set as an example, and the case where simultaneous transmission of PUCCH and PUSCH is not set is shown.
- FIG. 1A shows a case where PUSCH transmission is not performed in CC # 1-CC # 5 in a certain subframe.
- the user terminal multiplexes and transmits uplink control information of each CC on a PUCCH of a predetermined CC (here, CC # 1).
- FIG. 1B shows a case where there is uplink data (PUSCH transmission) to be transmitted to the radio base station by CC # 3 (SCell) in a certain subframe.
- the user terminal multiplexes the uplink control information (uplink control information to be transmitted on the PUCCH of CC # 1) on the PUSCH of CC # 3 and transmits it.
- the user terminal when simultaneous transmission of PUCCH and PUSCH is not set, the user terminal does not perform PUCCH transmission when there is PUSCH transmission, so it is possible to maintain single carrier transmission.
- it when there exists PUSCH transmission by multiple CC, it can be set as the structure which allocates PUCCH to predetermined CC (a primary cell or a secondary cell with the smallest cell index, etc.).
- FIG. 2 shows an example of the uplink control information transmission method when PUCCH-PUSCH simultaneous transmission is set.
- PUCCH-PUSCH simultaneous transmission When PUCCH-PUSCH simultaneous transmission is set, uplink control information is transmitted using only PUCCH, or a part of PUCCH and a part of PUSCH.
- FIG. 2A shows a case where a user terminal simultaneously assigns (multiplexes) a PUCCH and a PUSCH to one CC (here, a primary cell) when simultaneous transmission of PUCCH-PUSCH in the CC is set.
- FIG. 2B illustrates a case where the PUCCH and PUSCH are simultaneously allocated to different CCs by the user terminal when simultaneous transmission of PUCCH-PUSCH between CCs is set.
- the case where PUCCH is assigned to the primary cell (CC # 1) and PUSCH is assigned to the secondary cell (CC # 3) is shown.
- PUCCH-PUSCH simultaneous transmission when PUCCH-PUSCH simultaneous transmission is set, PUCCH and PUSCH are transmitted simultaneously between the same CC or different CCs.
- PUCCH on SCell uplink control information
- CA which expanded the number of CC is performed it can suppress that uplink control information concentrates on PCell by applying PUCCH on SCell.
- a cell group composed of at least one CC and determine HARQ transmission timing and / or PUCCH resources for each cell group.
- a cell group can be called a PUCCH cell group, a PUCCH CG, or a PUCCH cell-group.
- an SCell in which a PUCCH is set in a cell group can be referred to as a PUCCH cell, a PUCCH CC, or a PUCCH-SCell.
- FIG. 3 shows a case where two cell groups are set in CA in which 5 CC is set.
- the first cell group is composed of CC # 1-CC # 3
- the second cell group is composed of CC # 4 and # 5
- CC # 1 is PCell
- CC # 2- # 5 is The case of SCell is shown.
- User terminal can transmit uplink control information using PUCCH set to any one CC for each cell group.
- PUCCH is transmitted by CC # 1 serving as a primary cell in the first cell group
- PUCCH is transmitted by CC # 4 serving as PUCCH-SCell in the second cell group.
- the present embodiment will be described in detail with reference to the accompanying drawings.
- the number of CCs may be 4 or less, and can also be applied to a case of 6 or more.
- this embodiment can be suitably applied particularly when PUCCH-PUSCH simultaneous transmission (simultaneous PUCCH-PUSCH transmission) is not set in each cell group, but is not limited thereto.
- two cell groups of the first cell group and the second cell group are described as an example of the plurality of cell groups, but the number of cell groups is not limited to this.
- FIG. 4 shows an example in which transmission of uplink control information using PUSCH is controlled for each cell group.
- FIG. 4 shows a case where a first cell group having three CCs and a second cell group having two CCs are set as user terminals.
- Information related to the CC and / or cell group set in the user terminal can be notified to the user terminal by higher layer signaling (for example, RRC signaling).
- FIG. 4 shows a case where PUCCH is transmitted using CC # 1 serving as PCell in the first cell group and PUCCH is transmitted using CC # 4 serving as PUCCH-SCell in the second cell group. .
- PUSCH is transmitted in CC # 3 (SCell) of the first cell group and PUSCH is not transmitted in the second cell group in a certain subframe.
- uplink control information for example, HARQ-ACK
- uplink control information is transmitted using PUCCH of CC # 4.
- the required communication quality differs between the cell group that includes PCell and the cell group that does not include PCell that ensure connectivity through mobility management and communication quality measurement.
- a cell group that does not include a PCell is likely to be additionally used to increase throughput, and it is not always possible to guarantee UCI quality.
- the PCell UCI is connected quality by controlling transmission of uplink control information using PUCCH and transmission of uplink control information using PUSCH for each cell group. Can be transmitted by a PCell that can be secured, and the UCI of the SCell added to improve the data rate can be transmitted by the SCell. As a result, it is possible to achieve both quality assurance and UCI offload.
- the user terminal may transmit periodic channel state information (P-CSI: Periodic Channel State Information) for each cell group.
- P-CSI Periodic Channel State Information
- the existing CA only P-CSI of one CC can be reported per subframe, and CSI of other CCs cannot be reported (dropped) at the same time.
- P-CSI reports for different cell groups can be set with the same period and the same timing.
- the radio base station can perform highly accurate scheduling based on the P-CSI of each cell group.
- the user terminal can apply different HARQ timing to each cell group. For example, the user terminal controls HARQ transmission by applying FDD HARQ timing to the first cell group (first CG), and sets the TDD HARQ timing to the second cell group (second CG). It can be applied to control the transmission of HARQ (see FIG. 5).
- FDD HARQ timing and / or TDD HARQ timing are described in Rel.
- the timing defined before 12 can be used.
- the HADD timing of the FDD scheme can be set to a timing after a predetermined period (for example, 4 subframes) from the subframe in which the DL signal is received.
- the TDD HARQ timing can be a timing defined in advance based on the UL / DL configuration.
- the HARQ timing applied by each cell group can be determined based on the Duplex mode applied by the CC (PCell, PUCCH-SCell) that performs PUCCH transmission.
- the user terminal feeds back uplink control information (for example, HARQ) corresponding to each DL subframe in the UL subframe after four subframes.
- uplink control information for example, HARQ
- uplink control information is allocated to PUSCH and transmitted (see FIG. 5).
- the user terminal performs uplink control in a predetermined UL subframe based on the HARQ timing corresponding to a predetermined UL / DL configuration (here, UL / DL configuration 2). Feedback information.
- uplink control information is allocated to PUSCH and transmitted (see FIG. 5).
- the number of DL subframes corresponding to HARQ transmitted in a certain UL subframe may be different for each cell group.
- HARQ-ACKs corresponding to a plurality of DL subframes in time are transmitted on the PUSCH.
- HARQ-ACK corresponding to one DL subframe is transmitted by PUSCH.
- a different transmission / reception operation (for example, HARQ operation) is applied for each cell group.
- the user terminal performs reception / detection of a DL signal using DAI (Downlink Assignment Index) and controls HARQ transmission in a cell group to which TDD-type HARQ timing is applied.
- DAI Downlink Assignment Index
- DAI is used for a DL subframe counter in TDD to which A / N bundling is applied, and is notified to a user terminal by being included in downlink control information (DCI) for scheduling PDSCH and DCI for scheduling PUSCH.
- DCI downlink control information
- DAI can also be included in DCI (UL grant) that schedules the PUSCH of the uplink subframe (SF # 2) for the user terminal. Unlike DCI that schedules PDSCH, only one UL grant is generated per uplink subframe. For this reason, the DAI included in the DCI that schedules the PUSCH does not notify the PDSCH to be scheduled as a counter, but notifies the total number of PDSCHs corresponding to the PUSCH instructed by the UL grant. Therefore, the user terminal detects UL grant and determines the number of bits of the A / N response signal to be multiplexed (PUGGYBACK) on the PUSCH according to the value indicated by the DAI included in the UL grant.
- PUGGYBACK A / N response signal to be multiplexed
- the user terminal can grasp information (DL subframe number) regarding the DL subframe to which the DL signal is allocated based on the DAI transmitted from the radio base station.
- the user terminal may appropriately transmit HARQ in the second cell group using the TDD-type HARQ timing. This is possible (see FIG. 7).
- DCI UL grant
- an increase in overhead of DCI transmitted from the radio base station can be suppressed.
- the user terminal determines whether or not UL DAI is included in DCI (UL grant) for each cell group, and controls transmission / reception operations (for example, HARQ feedback). For example, the user terminal assumes that DAI is not included in the DCI of the cell group that uses the FDD HARQ timing, and that DAI is included in the DCI of the cell group that uses the TDD HARQ timing. To calculate the payload size of DCI. Then, assuming the payload size, a receiving operation such as blind decoding of DCI can be performed on the PDCCH or EPDCCH of the CC included in each cell group.
- 5 and 7 show the case where one CC is set in each cell group. However, even when multiple CCs are set in each cell group, it is based on the Duplex mode used for HARQ timing. HARQ feedback (with or without DAI) can be controlled.
- the HARQ timing of each cell group can be determined according to Duplex mode (FDD or TDD) applied by a predetermined CC in each cell group.
- the predetermined CC in each cell group may be a cell (PUCCH cell) that transmits PUCCH.
- the user terminal When the PUCCH cell of each cell group (for example, CC # 4 in FIG. 4) is a TDD cell to which TDD is applied, the user terminal assumes that UL DAI is included in the UL grant to which the PUSCH in the cell group is assigned. To send and receive.
- the transmission / reception processing includes decoding processing and HARQ-ACK transmission processing (for example, determination of the number of bits).
- the user terminal when the PUCCH cell of each cell group (for example, CC # 1 in FIG. 4) is an FDD cell to which FDD is applied, the user terminal includes UL DAI in the UL grant to which the PUSCH in the cell group is assigned. It is assumed that there is no transmission / reception process.
- FIG. 8 shows an example of controlling transmission of uplink control information (UCI on PUSCH) using PUSCH regardless of the cell group.
- FIG. 8 shows a case where a first cell group having three CCs and a second cell group having two CCs are set as user terminals.
- FIG. 8 shows a case where PUCCH is transmitted using CC # 1 serving as PCell in the first cell group and PUCCH is transmitted using CC # 4 serving as PUCCH-SCell in the second cell group. .
- PUSCH is transmitted in CC # 3 (SCell) of the first cell group and PUSCH is not transmitted in the second cell group in a certain subframe.
- uplink control information for example, HARQ-ACK
- control information to be transmitted on the PUCCH of CC # 4 is multiplexed on the PUSCH of CC # 3 of the first cell group.
- the second mode in the configuration for controlling PUCCH transmission (PUCCH on SCell) for each PUCCH cell group, when there is PUSCH transmission, a predetermined cell in which PUSCH is transmitted as uplink control information for each cell group. Assign to That is, when there is PUSCH transmission in any CC, uplink control information is multiplexed on PUSCH regardless of which PUCCH cell group it belongs to.
- single-carrier transmission can be performed when uplink control information is transmitted using PUSCH.
- PUSCH uplink control information
- the user terminal may transmit periodic channel state information (P-CSI: Periodic Channel State Information) for each cell group.
- P-CSI Periodic Channel State Information
- the user terminal can multiplex and transmit the periodic CSI of each cell group on the PUSCH of the same CC.
- the periodic CSI of one CC may be selected (periodic CSI of other CCs may be dropped) and multiplexed on the PUSCH for transmission.
- the user terminal can apply different HARQ timing to each cell group. For example, the user terminal controls HARQ transmission by applying FDD HARQ timing to the first cell group (first CG), and sets the TDD HARQ timing to the second cell group (second CG). It can be applied to control HARQ transmission (see FIG. 9).
- the user terminal at the timing (predetermined UL subframe) in which the HARQ is transmitted in the second cell group to which the TDD-type HARQ timing is applied, the user terminal multiplexes the uplink control information of the two cell groups on the PUSCH of the predetermined CC. It becomes.
- the user terminal transmits HARQ corresponding to one DL subframe of the first cell group and HARQ corresponding to four DL subframes of the second cell group to a predetermined CC (here, the first CC). It feeds back with PUSCH of CC of one cell group.
- the problem is how to determine the number of HARQ bits to be fed back by the user terminal.
- the user terminal determines the number of HARQ-ACK bits to be transmitted on PUSCH (UCI on PUSCH) based on higher layer signaling Was.
- the number of CCs configured in the user terminal and the maximum value obtained in the transmission mode (TM) of each CC are the number of bits of HARQ-ACK. For example, when the number of CCs is 5 and the number of codewords (CW) is 2, the number of HARQ-ACK bits is 10 (maximum). Also, CCs for which no DL signal was scheduled were fed back as NACKs. As described above, when multiplexing is performed on the PUSCH by applying the HARQ timing of the existing FDD, the HARQ-ACK is defined only up to a maximum of 10 bits.
- the uplink control information of the second cell group that uses the TDD HARQ is multiplexed on the PUSCH of the cell that uses the FDD HARQ.
- the number of HARQ-ACK bits included in the PUSCH transmitted in the cell to which the FDD-type HARQ timing is applied is influenced not only by the number of CCs ⁇ the number of CWs but also by the number of DL subframes in the time direction.
- HARQ transmission is controlled based on a predetermined condition.
- the HARQ transmission method in the second aspect will be described below.
- the HARQ-ACK of the CC of the second cell group to which the HADD timing of the TDD scheme is applied is transmitted using the uplink shared channel of the CC of the first cell group to which the HARQ timing of the FDD scheme is applied.
- the present embodiment is not limited to this.
- First method when the uplink control information of each cell group is allocated to the PUSCH of the CC of the first cell group, transmission of HARQ-ACK is controlled with the maximum number of bits that can be multiplexed on the PUSCH.
- the user terminal can determine the maximum number of bits that can be multiplexed on the PUSCH based on information notified by higher layer signaling. As information notified by higher layer signaling, information on the number of CCs to be set, the number of CWs set in each CC, and the maximum number of DL subframes that can be fed back by one UL (for example, UL / DL configuration, etc.) At least one of
- the user terminal controls transmission of HARQ-ACK on the assumption that HARQ-ACK is 38 bits. For example, assuming that the HARQ-ACK is 38 bits, the user terminal generates and encodes HARQ-ACK bits and multiplexes them on the PUSCH.
- the user terminal can control the encoding process based on the number of HARQ-ACK bits determined based on information notified by higher layer signaling. For example, the user terminal can apply spatial bundling as HARQ-ACK encoding when the HARQ-ACK bit is equal to or greater than a predetermined value. In this case, HARQ-ACK bits of DL subframes of all CCs are spatially bundled, and predetermined coding can be applied to the HARQ-ACK bits after spatial bundling. Also for the encoding process, different encoding can be applied depending on the number of HARQ-ACK bits.
- the user terminal spatially bundles the HARQ-ACK bits of all DL subframes of each CC (19 bits), and the 19 bits after the spatial bundling Predetermined encoding can be applied.
- the predetermined encoding the channel encoding of the existing system applied to HARQ-ACK when 11 bits are exceeded can be used.
- the UL DAI is transmitted to the user terminal for the DCI (UL grant) that allocates the PUSCH to the CC of the second cell group.
- DCI UL grant
- it can be set as the structure which does not include UL DAI with respect to UL grant which allocates PUSCH to CC of a 1st cell group (refer FIG. 10).
- the user terminal can determine the presence / absence of DAI based on Duplex mode (FDD / TDD) applied to each cell group, and can perform PDCCH reception processing (for example, blind decoding). Also, the user terminal can control HARQ feedback assuming the maximum number of bits that can be taken when HARQ-ACK is transmitted on the PUSCH. In this case, the user terminal can control to transmit a NACK for CCs and / or CWs that do not receive the DL signal.
- FDD / TDD Duplex mode
- PDCCH reception processing for example, blind decoding
- the user terminal multiplexes the HARQ-ACK on the PUSCH of the CC of the first cell group by determining the HARQ-ACK bit in consideration of the number of DL subframes in the second cell group.
- HARQ-ACK transmission can be performed appropriately.
- the number of bits of HARQ-ACK is determined based on predetermined information.
- the predetermined information can be determined based on information notified by higher layer signaling or information notified by physical signaling.
- the information notified by higher layer signaling includes at least one of information on the number of CCs to be set and the number of CWs set in each CC.
- the information notified by physical signaling includes information on the number of scheduled DL subframes, and can be acquired using, for example, DAI.
- DAI the user terminal can determine the number of DL subframes to be scheduled based on the value specified by UL DAI (the number of DL subframes actually allocated).
- the radio base station transmits the downlink control information including the DAI to the user terminal based on the DL subframe actually allocated in each cell.
- the user terminal can grasp the number of scheduled DL subframes based on the DAI included in the downlink control information. Also, based on the number of CCs and the number of CWs notified by higher layer signaling, the number of HARQ-ACK bits to be fed back is determined and transmission processing (for example, encoding processing) is performed. Therefore, when 1CC using FDD is included in the first cell group and 4CC using TDD is included in the second cell group, the radio base station and the user terminal can perform HARQ-ACK in a range of 10 bits to 38 bits. Notification / determination of the number of bits.
- the user terminal can control encoding according to the number of bits of HARQ-ACK. For example, when the number of HARQ bits is 1, 2, 3 to 11, or 12 to 20, different encoding processes can be applied. Further, when the number of HARQ bits exceeds 21 bits, spatial bundling may be applied.
- the UL DAI can be included in the DCI (UL grant) that assigns the PUSCH to the CC of the second cell group and the UL grant that assigns the PUSCH to the CC of the first cell group. (See FIG. 11).
- the user terminal can operate assuming that at least the UL DAI of each cell group has the same value.
- the user terminal can perform PDCCH reception processing (for example, blind decoding) on the assumption that DAI is included in DCI transmitted from each cell group.
- the user terminal can determine the number of bits when HARQ-ACK is transmitted on the PUSCH based on DAI (the number of scheduled DL subframes) in addition to the number of CCs and the number of CWs.
- the user terminal multiplexes the HARQ-ACK on the PUSCH of the CC of the first cell group by determining the HARQ-ACK bit in consideration of the number of scheduled DL subframes.
- HARQ-ACK transmission can be performed appropriately.
- the payload in the first method, the maximum number of bits calculated by upper layer signaling was used as the payload, but in the second method, the payload can be dynamically specified by UL DAI. The payload can be reduced to reduce the coding rate, and UCI can be of higher quality.
- the DAI included in the UL grant that schedules the CC of the first cell group is included in the UL grant transmitted in all DL subframes.
- the DAI may be included only in the UL grant of a specific DL subframe.
- the specific DL subframe may be a subframe in which HARQ of the second cell group can be transmitted.
- the DAI payload can be reduced in subframes other than the specific subframe, an increase in downlink control information overhead can be suppressed.
- ⁇ Third method> when there is a cell (for example, the second cell group) to which the TDD-type HARQ timing is applied, the user terminal performs PUSCH in the cell (first cell group) to which the FDD-type HARQ timing is applied.
- the used uplink control information is not transmitted (see FIG. 12).
- the user terminal When uplink data (UL-SCH) transmission is assigned in the first cell group, the user terminal drops the uplink data and transmits uplink control information using the PUCCH and / or PUSCH of the CC in the second cell group. .
- the uplink control information of the CC of the first cell group is multiplexed on the PUSCH and transmitted.
- the uplink control information of the CC of the first cell group is multiplexed and transmitted on the PUCCH of the CC (PUCCH-SCell) of the second cell group.
- the capability information as to whether or not the HARQ-ACK of the second cell group can be multiplexed and transmitted on the PUSCH of the CC of the first cell group may be notified in advance from the user terminal to the base station. For example, the user terminal notifies the radio base station of the capability information as UE capability signaling.
- the user equipment that can multiplex and transmit the HARQ-ACK of the second cell group to the PUSCH of the CC of the first cell group applies the first method or the second method.
- a user terminal (a user terminal whose UE capability is “False”) that can multiplex and transmit HARQ-ACK of the second cell group to the PUSCH of the CC of the first cell group applies the third method.
- FIG. 13 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- the radio communication system shown in FIG. 13 is a system including, for example, an LTE system, SUPER 3G, LTE-A system, and the like.
- carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of component carriers are integrated can be applied.
- This wireless communication system may be called IMT-Advanced, or may be called 4G, 5G, FRA (Future Radio Access), or the like.
- the radio communication system 1 shown in FIG. 13 includes a radio base station 11 that forms a macro cell C1, and radio base stations 12a-12c that are arranged in the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. . 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 that use different frequencies simultaneously by CA or DC. Further, the user terminal 20 can apply CA using at least 2 CCs (cells), and can use 6 or more CCs.
- 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.
- a wide bandwidth may be used between the user terminal 20 and the radio base station 12, or The same carrier may be used.
- a wired connection optical fiber, X2 interface, etc.
- a wireless connection may be employed between the wireless base station 11 and the wireless base station 12 (or between the two wireless base stations 12).
- 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 but also a fixed communication terminal.
- OFDMA Orthogonal Frequency Division Multiple Access
- 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 methods are not limited to these combinations.
- 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, and predetermined SIB (System Information Block) are transmitted by PDSCH. Moreover, MIB (Master Information Block) etc. are 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 HAICH transmission confirmation signal (ACK / NACK) for PUSCH is transmitted by PHICH.
- the EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel) and may be used to transmit DCI or the like in the same manner as the PDCCH.
- a downlink reference signal a cell-specific reference signal (CRS), a channel state measurement reference signal (CSI-RS), a user-specific reference signal used for demodulation includes reference signals (DM-RS: Demodulation Reference Signal).
- CRS cell-specific reference signal
- CSI-RS channel state measurement reference signal
- DM-RS Demodulation Reference Signal
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH) shared by each user terminal 20 are used. Physical Random Access Channel) is used. User data and higher layer control information are transmitted by PUSCH. Also, downlink radio quality information (CQI: Channel Quality Indicator), a delivery confirmation signal (HARQ-ACK), and the like are transmitted by PUCCH.
- CQI Channel Quality Indicator
- HARQ-ACK delivery confirmation signal
- a random access preamble (RA preamble) for establishing a connection with the cell is transmitted by the PRACH.
- FIG. 14 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 unit 103 includes a transmission unit and a reception unit.
- 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, transmission processing of HARQ (Hybrid Automatic Repeat reQuest)
- HARQ Hybrid Automatic Repeat reQuest
- IFFT inverse Fast Fourier Transform
- precoding processing etc.
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to each transmitting / receiving unit 103.
- Each transmission / reception unit 103 converts the baseband signal output by precoding from the baseband signal processing unit 104 for each antenna 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 transmits information on CCs that perform CA (for example, the number of CCs to be set, etc.), information on the number of CWs of each CC number, information on the UL / DL configuration applied by the TDD cell, and the like.
- the transmission / reception part 103 can be notified to a user terminal including DAI in DCI which schedules a TDD cell, and / or DCI which schedules FDD.
- the transmission / reception unit 103 can be 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 radio frequency signal received by each transmitting / receiving antenna 101 is amplified by the amplifier unit 102.
- Each transmitting / receiving unit 103 receives the upstream 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, status 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 may transmit and receive signals (backhaul signaling) to and from the adjacent radio base station 10 via an inter-base station interface (for example, an optical fiber or an X2 interface).
- FIG. 15 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 15 mainly shows functional blocks of characteristic portions in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication. As shown in FIG. 15, the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit (generation unit) 302, a mapping unit 303, and a reception signal processing unit 304. .
- the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit (generation unit) 302, a mapping unit 303, and a reception signal processing unit 304.
- the control unit (scheduler) 301 controls scheduling (for example, resource allocation) of downlink data transmitted on the PDSCH, downlink control information transmitted on the PDCCH and / or EPDCCH. It also controls scheduling of system information, synchronization signals, paging information, CRS, CSI-RS, and the like.
- the control unit 301 can control the CC, cell group, etc. set in the user terminal. In addition, the control unit 301 controls scheduling of an uplink reference signal, an uplink data signal transmitted by PUSCH, an uplink control signal transmitted by PUCCH and / or PUSCH, a random access preamble transmitted by PRACH, and the like.
- the control unit 301 can be a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 generates a DL signal based on an instruction from the control unit 301 and outputs the DL signal to the mapping unit 303. For example, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a DL assignment that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information. Further, the transmission signal generation unit 302 can generate downlink control information so that DAI is included (or not included) in DCI that schedules CCs of each cell group.
- the transmission signal generation unit 302 can be 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 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 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, demodulation) on UL signals (for example, a delivery confirmation signal (HARQ-ACK), a data signal transmitted by PUSCH, etc.) transmitted from the user terminal. Decryption, etc.).
- the processing result is output to the control unit 301.
- the received signal processing unit 304 may measure received power (for example, RSRP (Reference Signal Received Power)), received quality (RSRQ (Reference Signal Received Quality)), channel state, and the like using the received signal. .
- RSRP Reference Signal Received Power
- RSS Reference Signal Received Quality
- channel state channel state
- the measurement result in the reception signal processing unit 304 may be output to the control unit 301.
- a measurement unit that performs a measurement operation may be provided separately from the reception signal processing unit 304.
- the reception signal processing unit 304 may be composed of a signal processor, a signal processing circuit or a signal processing device, and a measuring device, a measurement circuit or a measuring device which are described based on common recognition in the technical field according to the present invention. it can.
- FIG. 16 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
- the user terminal 20 includes a plurality of transmission / reception antennas 201 for MIMO transmission, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
- the transmission / reception unit 203 may include a transmission unit and a reception unit.
- the radio frequency signals received by the plurality of transmission / reception antennas 201 are each amplified by the amplifier unit 202.
- Each transmitting / receiving 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 transmits uplink control information (for example, HARQ-ACK) generated based on the DL signal transmitted from the radio base station. Also, the capability information (capability) of the user terminal can be notified to the radio base station. Further, the transmission / reception unit 203 can receive information regarding the number of CCs to be set, information regarding the CW of each CC, UL / DL configuration, and the like.
- the transmission / reception unit 203 can be 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 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.
- broadcast information in the downlink data 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 retransmission control transmission processing (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
- the data is transferred to the transmission / reception 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.
- FIG. 17 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment. Note that FIG. 17 mainly shows functional blocks of characteristic portions in the present embodiment, and the user terminal 20 also has other functional blocks necessary for wireless communication. As illustrated in FIG. 17, the baseband signal processing unit 204 included in the user terminal 20 includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a determination unit 405. I have.
- the control unit 401 can control the transmission signal generation unit 402, the mapping unit 403, and the reception signal processing unit 404. For example, the control unit 401 obtains, from the reception signal processing unit 404, a downlink control signal (signal transmitted by PDCCH / EPDCCH) and a downlink data signal (signal transmitted by PDSCH) transmitted from the radio base station 10. . The control unit 401 generates / transmits uplink control signals (for example, HARQ-ACK) and uplink data based on downlink control information (UL grant), a result of determining whether retransmission control is necessary for downlink data, and the like. Control.
- uplink control signals for example, HARQ-ACK
- uplink data for example, UL grant
- control unit 401 transmits uplink control information using a SCell uplink control channel (PUCCH on SCell) and uplink control using an uplink shared channel for each of a plurality of cell groups each including at least one CC.
- Information (UCI on PUSCH) transmission can be controlled (see FIG. 4).
- control unit 401 controls HARQ transmission by applying FDD HARQ timing to the first cell group, and applies HADD timing by TDD to the second cell group. Can be controlled.
- control unit 401 controls transmission of uplink control information (PUCCH on SCell) using an uplink control channel for each of a plurality of cell groups each including at least one CC, and uplink control information using an uplink shared channel Transmission (UCI on PUSCH) can be controlled between a plurality of cell groups (see FIG. 8).
- uplink control information PUCCH on SCell
- UCI on PUSCH uplink shared channel Transmission
- control unit 401 can perform control so that HARQ of the second cell group is transmitted using the uplink shared channel of the CC of the first cell group.
- the control unit 401 can control the number of HARQ bits based on the number of DL subframes corresponding to the uplink shared channel.
- the control unit 401 may control the number of HARQ bits based on the number of scheduled DL subframes (for example, the DAI value included in the downlink control information).
- the control unit 401 may perform control so as not to transmit uplink control information using the uplink shared channel in the CC of the first cell group.
- the control unit 401 can be a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates a UL signal based on an instruction from the control unit 401 and outputs the UL signal to the mapping unit 403. For example, the transmission signal generation unit 402 generates an uplink control signal such as a delivery confirmation signal (HARQ-ACK) or channel state information (CSI) based on an instruction from the control unit 401.
- HARQ-ACK delivery confirmation signal
- CSI channel state information
- the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10. Also, the transmission signal generation unit 402 generates a result (ACK / NACK) determined by the determination unit 405 based on an instruction from the control unit 401 as an UL signal.
- the transmission signal generation unit 402 may be 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 mapping unit 403 maps the uplink signal (uplink control signal and / or uplink data) 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 resource to the transmission / reception unit 203.
- the mapping unit 403 may be 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 and demodulation) on a DL signal (for example, a downlink control signal transmitted from a radio base station using PDCCH / EPDCCH, a downlink data signal transmitted using PDSCH, etc.). , Decryption, etc.).
- the reception signal processing unit 404 outputs information received from the radio base station 10 to the control unit 401 and the determination unit 405.
- 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 determination unit 405 performs retransmission control determination (ACK / NACK) based on the decoding result of the received signal processing unit 404 and outputs the result to the control unit 401.
- the determination unit 405 can be configured by a determiner, a determination circuit, or a determination device described based on common recognition in the technical field according to the present invention.
- each functional block is realized by one physically coupled device, or may be realized by two or more physically separated devices connected by wire or wirelessly and by a plurality of these devices. Good.
- radio base station 10 and the user terminal 20 are realized using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). May be.
- the radio base station 10 and the user terminal 20 may be realized by a computer apparatus including a processor (CPU), a communication interface for network connection, a memory, and a computer-readable storage medium holding a program. Good.
- the processor and memory are connected by a bus for communicating information.
- the computer-readable recording medium is a storage medium such as a flexible disk, a magneto-optical disk, a ROM, an EPROM, a CD-ROM, a RAM, and a hard disk.
- the program may be transmitted from a network via a telecommunication line.
- the radio base station 10 and the user terminal 20 may include an input device such as an input key and an output device such as a display.
- the functional configurations of the radio base station 10 and the user terminal 20 may be realized by the hardware described above, may be realized by a software module executed by a processor, or may be realized by a combination of both.
- the processor controls the entire user terminal by operating an operating system. Further, the processor reads programs, software modules and data from the storage medium into the memory, and executes various processes according to these.
- the program may be a program that causes a computer to execute the operations described in the above embodiments.
- the control unit 401 of the user terminal 20 may be realized by a control program stored in a memory and operated by a processor, and may be realized similarly for other functional blocks.
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Abstract
Description
第1の態様では、少なくとも1個のコンポーネントキャリア(CC:Component Carrier)をそれぞれ含む複数のセルグループ毎に、上り共有チャネルを用いた上り制御情報の送信(UCI on PUSCH)を制御する場合について説明する。
第2の態様では、少なくとも1個のコンポーネントキャリア(CC)をそれぞれ含む複数のセルグループが設定される場合に、上り共有チャネルを用いた上り制御情報の送信(UCI on PUSCH)を複数のセルグループ間で制御する場合について説明する。
第1の方法では、第1セルグループのCCのPUSCHに各セルグループの上り制御情報を割当てる場合、当該PUSCHで多重し得る最大ビット数でHARQ-ACKの送信を制御する。ユーザ端末は、PUSCHで多重し得る最大ビット数を、上位レイヤシグナリングで通知される情報に基づいて決定することができる。上位レイヤシグナリングで通知される情報としては、設定されるCC数、各CCで設定されるCW数、1つのULでフィードバックし得る最大のDLサブフレーム数(例えば、UL/DL構成等)に関する情報の一つを少なくとも含んでいる。
第2の方法では、第1セルグループのCCのPUSCHに各セルグループの上り制御情報を割当てる場合、所定の情報に基づいてHARQ-ACKのビット数を決定する構成とする。所定の情報としては、上位レイヤシグナリングで通知される情報、物理シグナリングで通知される情報に基づいて決定することができる。
第3の方法では、TDD方式のHARQタイミングを適用するセル(例えば、第2セルグループ)がある場合、ユーザ端末は、FDD方式のHARQタイミングを適用するセル(第1セルグループ)では、PUSCHを用いた上り制御情報の送信を行わない構成とする(図12参照)。
第2セルグループのHARQ-ACKを第1セルグループのCCのPUSCHに多重して送信できるか否かの能力情報は、ユーザ端末から基地局にあらかじめ通知する構成としてもよい。例えば、ユーザ端末は、当該能力情報をUE capabilityシグナリングとして無線基地局へ通知する。
以下、本発明の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の実施形態に係る無線通信方法が適用される。なお、上記の各実施形態に係る無線通信方法は、それぞれ単独で適用されてもよいし、組み合わせて適用してもよい。
図14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、送受信部103は、送信部及び受信部で構成される。
図16は、本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、MIMO伝送のための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、送受信部203は、送信部及び受信部から構成されてもよい。
Claims (10)
- 無線基地局とキャリアアグリゲーションを用いて通信を行うユーザ端末であって、
無線基地局から送信されるDL信号を受信する受信部と、
受信したDL信号に基づいて生成した上り制御情報を送信する送信部と、
上り制御情報の送信を制御する制御部と、を有し、
前記制御部は、少なくとも1個のコンポーネントキャリア(CC:Component Carrier)をそれぞれ含む複数のセルグループ毎に、上り制御チャネルを用いた上り制御情報の送信と、上り共有チャネルを用いた上り制御情報の送信とを制御することを特徴とするユーザ端末。 - 複数のセルグループに少なくとも第1セルグループと第2セルグループとが含まれ、前記制御部は、第1セルグループに対してFDD方式のHARQタイミングを適用してHARQの送信を制御し、第2セルグループに対してTDD方式のHARQタイミングを適用してHARQの送信を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。
- 前記受信部は、第1セルグループのCCをスケジューリングする下り制御情報にDAI(Downlink Assignment Index)が含まれないと仮定して受信動作を行い、第2セルグループのCCをスケジューリングする下り制御情報にDAIが含まれると仮定して受信動作を行うことを特徴とする請求項2に記載のユーザ端末。
- 無線基地局とキャリアアグリゲーションを用いて通信を行うユーザ端末であって、
無線基地局から送信されるDL信号を受信する受信部と、
受信したDL信号に基づいて生成した上り制御情報を送信する送信部と、
前記上り制御情報の送信を制御する制御部と、を有し、
前記制御部は、少なくとも1個のコンポーネントキャリア(CC:Component Carrier)をそれぞれ含む複数のセルグループ毎に上り制御チャネルを用いた上り制御情報の送信を制御し、上り共有チャネルを用いた上り制御情報の送信を複数のセルグループ間で制御することを特徴とするユーザ端末。 - 複数のセルグループに少なくとも第1セルグループと第2セルグループとが含まれ、前記制御部は、第1セルグループに対してFDD方式のHARQタイミングを適用してHARQの送信を制御し、第2セルグループに対してTDD方式のHARQタイミングを適用してHARQの送信を制御することを特徴とする請求項4に記載のユーザ端末。
- 前記制御部は、第2セルグループのCCに対応するHARQを第1セルグループのCCの上り共有チャネルを用いて送信する場合、上り共有チャネルに対応するDLサブフレーム数に基づいてHARQのビット数を制御することを特徴とする請求項5に記載のユーザ端末。
- 前記制御部は、第2セルグループのCCに対応するHARQを第1セルグループのCCの上り共有チャネルを用いて送信する場合、下り制御情報に含まれるDAI(Downlink Assignment Index)に基づいてHARQのビット数を制御することを特徴とする請求項5に記載のユーザ端末。
- 前記制御部は、TDD方式のHARQタイミングを適用してHARQの送信を制御する第2セルグループが設定される場合、第1セルグループのCCにおいて上り共有チャネルを用いた上り制御情報の送信を行わないことを特徴とする請求項5に記載のユーザ端末。
- ユーザ端末とキャリアアグリゲーションを用いて通信を行う無線基地局であって、
DL信号を送信する送信部と、
ユーザ端末から送信される上り制御情報を受信する受信部と、を有し、
前記受信部は、少なくとも1個のコンポーネントキャリア(CC:Component Carrier)をそれぞれ含む複数のセルグループ毎に送信が制御された上り制御チャネル、又は上り共有チャネルを用いた上り制御情報を受信することを特徴とする無線基地局。 - 無線基地局とキャリアアグリゲーションを用いて通信を行うユーザ端末の無線通信方法であって、
無線基地局から送信されるDL信号を受信する工程と、
受信したDL信号に基づいて生成した上り制御情報を送信する工程と、を有し、
少なくとも1個のコンポーネントキャリア(CC:Component Carrier)をそれぞれ含む複数のセルグループ毎に、上り制御チャネルを用いた上り制御情報の送信と、上り共有チャネルを用いた上り制御情報の送信とを制御することを特徴とする無線通信方法。
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| FIEP16773110.8T FI3280204T3 (fi) | 2015-04-02 | 2016-03-31 | Päätelaite ja radioviestintämenetelmä |
| US15/563,714 US11064467B2 (en) | 2015-04-02 | 2016-03-31 | User terminal, radio base station and radio communication method |
| JP2017510183A JPWO2016159230A1 (ja) | 2015-04-02 | 2016-03-31 | ユーザ端末、無線基地局及び無線通信方法 |
| CN201680020412.9A CN107432015B (zh) | 2015-04-02 | 2016-03-31 | 用户终端、无线基站以及无线通信方法 |
| EP16773110.8A EP3280204B1 (en) | 2015-04-02 | 2016-03-31 | Terminal, and radio communication method |
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| JP2021508991A (ja) * | 2018-01-19 | 2021-03-11 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | アップリンク共有チャネル上での送信のための異なるタイプの制御情報およびアップリンクデータの間のリソーススプリッティング |
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| Publication number | Publication date |
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| JP2020048235A (ja) | 2020-03-26 |
| CN107432015A (zh) | 2017-12-01 |
| JP2018152922A (ja) | 2018-09-27 |
| US11064467B2 (en) | 2021-07-13 |
| EP3280204A4 (en) | 2018-11-14 |
| JP6871355B2 (ja) | 2021-05-12 |
| CN107432015B (zh) | 2021-12-07 |
| FI3280204T3 (fi) | 2025-02-03 |
| JPWO2016159230A1 (ja) | 2018-02-01 |
| EP3280204A1 (en) | 2018-02-07 |
| EP3280204B1 (en) | 2025-01-01 |
| US20180077698A1 (en) | 2018-03-15 |
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