WO2017078033A1 - 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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- WO2017078033A1 WO2017078033A1 PCT/JP2016/082502 JP2016082502W WO2017078033A1 WO 2017078033 A1 WO2017078033 A1 WO 2017078033A1 JP 2016082502 W JP2016082502 W JP 2016082502W WO 2017078033 A1 WO2017078033 A1 WO 2017078033A1
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- user terminal
- transmission
- counter dai
- ack
- harq
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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
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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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
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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]
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
- H04W52/545—Signalisation aspects of the TPC commands, e.g. frame structure modifying TPC bits in special situations
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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
- 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
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
- LTE-A also referred to as LTE Advanced, LTE Rel. 10, 11 or 12
- LTE Long Term Evolution
- Successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), LTE Rel.13, etc.
- FRA Full Radio Access
- 5G 5th generation mobile communication system
- LTE-A employs carrier aggregation (CA) that performs communication using a plurality of carriers simultaneously with a predetermined bandwidth (maximum 20 MHz) as a basic unit.
- CA carrier aggregation
- a carrier that is a basic unit in carrier aggregation is referred to as a component carrier (CC), for example, LTE Rel. This corresponds to 8 system bands.
- PCell Primary Cell
- SCell Secondary Cell
- the UE can connect to PCell first and add SCell as needed.
- the PCell is a cell similar to a single cell (stand-alone cell) that supports RLM (Radio Link Monitoring), SPS (Semi-Persistent Scheduling), and the like.
- the SCell is a cell set for the UE in addition to the PCell.
- the SCell is a cell that can be communicated (scheduled) for the first time after being activated because it is in an inactive state immediately after being added to the user terminal.
- the license band for example, 800 MHz, 2 GHz, 1.7 GHz band and the like are used.
- the unlicensed band for example, the same 2.4 GHz, 5 GHz band as Wi-Fi (registered trademark) is used.
- LTE Rel. 13 considers carrier aggregation (LAA: License-Assisted Access) between licensed and unlicensed bands, but will also consider dual connectivity (DC) and unlicensed band stand-alone in the future. May be eligible.
- LAA License-Assisted Access
- DC dual connectivity
- HARQ Hybrid Automatic Repeat reQuest
- a user terminal or radio base station feeds back a delivery confirmation signal (also referred to as HARQ-ACK, ACK / NACK, A / N) related to the data at a predetermined timing according to the data reception result.
- the radio base station or user terminal controls data retransmission based on the fed back HARQ-ACK.
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the bit size (also referred to as codebook size or bit string size) of ACK / NACK fed back by the user terminal is semi-statically preliminarily transmitted from the radio base station by higher layer signaling. It is determined based on information such as CC to be notified. Therefore, when CA is applied, the user terminal performs ACK / NACK feedback with a codebook size fixedly determined based on the set number of CCs and the like.
- the codebook size cannot be changed in the user terminal.
- the ACK / NACK size to be transmitted may become larger than necessary even when the number of CCs that are actually scheduled is small.
- the present invention has been made in view of such a point, and even when a plurality of component carriers are set in a wireless communication system, a user terminal and a wireless base station that can appropriately perform HARQ-ACK feedback
- One of the objects is to provide a wireless communication method.
- a user terminal includes, in downlink control information, a reception unit that receives DL signals transmitted from a plurality of component carriers (CCs) and HARQ-ACK transmission for the received DL signals. And a control unit that performs control based on the counter DAI.
- the counter DAI is set to 3 bits or more in predetermined downlink control information.
- HARQ-ACK feedback can be appropriately performed even when a plurality of component carriers are set in the wireless communication system.
- FIG. 3A to 3D are diagrams illustrating an example when a user terminal continuously detects a plurality of CCs
- FIG. 3E is a diagram illustrating an example of an A / N codebook transmitted to the user terminal.
- FIGS. 5A to 5C are diagrams for explaining HARQ-ACK transmission using the counter DAI. It is a figure explaining PUCCH resource selection based on PUCCH format indicator and ARI in the 3rd mode.
- FIG. 1 is an explanatory diagram of carrier aggregation (CA).
- CA carrier aggregation
- LTE Rel LTE Rel.
- CC component carriers
- CC # 1-CC # 5 a basic unit
- the number of CCs that can be set per UE is limited to a maximum of five.
- LTE Rel. In 13 CAs it is considered that six or more CCs are bundled to further expand the bandwidth. That is, LTE Rel. In 13 CAs, it is considered to expand the number of CCs (cells) that can be set per UE to 6 or more (CA enhancement). For example, as shown in FIG. 1, when 32 CCs (CC # 1-CC # 32) are bundled, a maximum band of 640 MHz can be secured.
- uplink control information (UCI: Uplink Control Information) is transmitted from the UE to a device on the network side (for example, a radio base station (eNB: eNode B)). Feedback using PUCCH (Physical Uplink Control Channel).
- the UE may transmit UCI on an uplink shared channel (PUSCH: Physical Uplink Shared Channel) at a timing when uplink data transmission is scheduled. Based on the received UCI, the radio base station performs data retransmission control and scheduling control on the UE.
- PUSCH Physical Uplink Shared Channel
- PUCCH format 4 does not support code multiplexing (CDM) and can support allocation of 1 PRB or more (multiple PRBs).
- CDM code multiplexing
- DMRS demodulation reference signal
- PUCCH format 4 can have a PUSCH-like configuration.
- PUCCH format 5 supports code multiplexing (CDM), is allocated to 1 PRB, and is considered to have a configuration in which one demodulation reference signal (DMRS) is provided in each slot.
- the radio base station can set the same ARI value between the PDCCH and the EPDCCH that schedule PDSCHs of different SCells, and transmit the same to the user terminal.
- PUCCH format 3 an A / N codebook size of up to 10 bits is set when using FDD (Frequency Division Duplex), and up to 21 bits when using TDD (Time Division Duplex). Used for.
- the codebook (ACK / NACK bit string) size of HARQ-ACK transmitted by PUCCH is determined semi-static (semi-static) based on information notified by higher layer signaling.
- the size of the entire A / N bit string transmitted by PUCCH is determined based on the number of DL subframes subject to A / N per UL subframe.
- the A / N bit size to be fed back by the user terminal is determined based on the information notified by higher layer signaling, the A / N bit corresponding to the number of CCs actually scheduled for the user terminal. It may be different from the size. Therefore, when the A / N feedback of the existing system is applied, the A / N codebook size corresponding to the CC actually scheduled (DL signal is transmitted) and the codebook size notified by higher layer signaling are different. However, the user terminal cannot change the codebook size.
- the transmission power required for A / N transmission can be kept low by reducing the A / N codebook size fed back by the user terminal according to the scheduled CC. it can.
- the user terminal dynamically changes the number of A / N bits according to the number of scheduled CCs and the like. Can be considered.
- TDD supports a DL assignment index (DAI: Downlink Assignment Indicator (Index)) indicating DL signal assignment (scheduling) in the subframe direction (time direction).
- DAI Downlink Assignment Indicator
- the radio base station notifies the user terminal of DL DAI indicating the accumulated value (count value) of the number of subframes scheduled in the bundling window applied in TDD, in the DL assignment of each subframe. Further, the radio base station notifies the user terminal of UL DAI indicating the total number of subframes scheduled in the bundling window, included in the UL grant.
- CCs CC # 0, # 1, # 3, # 5, and # 6
- the user terminal may determine the HARQ-ACK codebook size based on the detected counter DAI value (for example, the maximum counter DAI value).
- the DAI is defined by 2 bits and the modulo operation is applied similarly to the existing TDD. In this case, if the user terminal does not simultaneously detect a 4CC DL signal having consecutive count values, the accumulated value can be correctly determined.
- the transmission point performs listening (also referred to as LBT, CCA, carrier sense, etc.) at a timing before a predetermined period before the transmission timing.
- the transmission point that executes LBT searches the entire target carrier band (for example, one component carrier (CC)) at a timing before a predetermined period before the transmission timing, and other devices It is confirmed whether (for example, a radio base station, a user terminal, a Wi-Fi device, etc.) is communicating in the carrier band.
- CC component carrier
- the transmission point When the transmission point confirms that no other device is communicating, it transmits using the carrier. For example, when the reception power measured by the LBT (reception signal power during the LBT period) is equal to or less than a predetermined threshold, the transmission point determines that the channel is in an idle state (LBT_idle) and performs transmission.
- LBT_idle reception signal power during the LBT period
- the transmission point when the transmission point detects that another device is in use even in a part of the target carrier band, the transmission point stops its transmission process. For example, if the transmission point detects that the received power of a signal from another device related to the band exceeds a predetermined threshold, the transmission point determines that the channel is busy (LBT_busy) and transmits the signal. Not performed. In the case of LBT_busy, the channel can be used only after performing LBT again and confirming that it is in an idle state.
- LBT_busy the channel can be used only after performing LBT again and confirming that it is in an idle state.
- FIG. 3 shows an example in which when 12 CCs are scheduled in a certain subframe, the user terminal is notified including the counter DAI in which the modulo operation is applied to the DL assignment of each CC.
- FIG. 3A shows a case where the user terminal makes four consecutive detection mistakes from the CC whose counter DAI is 2. Normally, if the number of CCs to be detected is 3 or less, the user terminal can grasp the detection error based on the counter DAI. However, if CC is missed for four or more consecutive times, the user terminal cannot notice the misdetection. In this case, the ACK / NACK codebook size (see FIG. 3E) transmitted by the user terminal may be different from the codebook size assumed by the radio base station.
- FIG. 3B shows a case where the user terminal misses four consecutive detections from a CC where the counter DAI is 3
- FIG. 3C shows a case where the user terminal misses four consecutive detections from a CC where the counter DAI is 0.
- the user terminal transmits HARQ-ACK using FIGS. 3B to 3D using the same codebook size as that of FIG. 3A (see FIG. 3E). For this reason, when the CC is missed for four or more consecutive times, the HARQ-ACK codebook size recognition may not match between the radio base station and the user terminal.
- the present inventors set the number of bits of the counter DAI included in predetermined downlink control information (for example, DL assignment) to be larger than 2 in CA (for example, Rel.13 CA) in which the number of CCs is expanded. I was inspired by that.
- the number of bits of the counter DAI can be defined as a value (for example, 5 bits) at which the reception failure probability of consecutive DL assignments is sufficiently small.
- the counter DAI is defined by 5 bits
- bit information bit information
- the user terminal can grasp a detection mistake.
- the user terminal can appropriately determine the HARQ-ACK codebook size based on the counter DAI and perform A / N transmission.
- the present inventors pay attention to the fact that the number of bits required for the counter DAI changes depending on the number of CCs, etc., and based on a predetermined condition (for example, the number of CCs to be set or the number of unlicensed band CCs).
- the idea was to set (switch) the number of bits of the counter DAI.
- the number and arrangement of CCs to be scheduled, the index of CCs to be scheduled, and signals to be transmitted are not limited to the following examples.
- the number of bits of the counter DAI can be set to a different value depending on the number of CCs configured in the user terminal or the number of CCs of the unlicensed band to be configured. For example, as shown in FIG. 4, when the number of CCs to be set is 5 to 8, the number of bits of the counter DAI of the DL assignment transmitted on the CC is 3 bits. Further, when the number of CCs to be set is 9 to 16, the number of bits of the counter DAI is 4 bits, and when the number of CCs to be set is 17 to 32, the number of bits of the counter DAI is 5 bits. be able to.
- the number of CCs may be the number including the license band CC and the unlicensed band CC (total number of CCs set in the user terminal) or only the number of unlicensed band CCs.
- the user terminal can distinguish whether the configured CC is a license band CC or an unlicensed band CC based on broadcast information of the CC.
- the user terminal may distinguish between the license band CC and the unlicensed band CC based on higher layer signaling set specifically for each user terminal and the CC number (band number).
- the modulo operation is not performed on the counter DAI included in the DL assignment of each CC (DL assignment of different CCs in the same subframe or the same bundling window).
- the counter DAI having the same value is not applied to the event.
- an increase in overhead caused by the counter DAI can be suppressed.
- the number of bits of the counter DAI included in the DL assignment may be controlled based on the type of DL assignment (the type of CC scheduled by the DL assignment). For example, the counter DAI having a different number of bits can be applied depending on whether the DL assignment is for scheduling the PDSCH of the license band CC or the DL assignment for scheduling the PDSCH of the unlicensed band CC.
- the counter DAI included in the DL assignment that schedules the downlink shared channel (for example, PDSCH) of the license band CC is 2 bits.
- the counter DAI included in the DL assignment for scheduling the downlink shared channel of the unlicensed band CC can be 3 to 5 bits depending on the number of unlicensed band CCs to be set.
- the number of bits of the counter DAI included in the DL assignment may be controlled based on the type of CC in which the DL assignment is transmitted (received). For example, the number of bits of the counter DAI can be set according to whether the DL assignment is transmitted (received) in the license band CC or transmitted (received) in the unlicensed band CC.
- the DL assignment counter DAI for scheduling the PDSCH of the license band CC can be set to 2 bits
- the DL assignment counter DAI for scheduling the PDSCH of the unlicensed band CC can be set to 3 to 5 bits.
- the number of bits of the counter DAI can be set to 2 bits.
- the number of bits of the counter DAI included in the DL assignment is appropriately set according to the scheduling method (for example, cross carrier scheduling).
- the scheduling method for example, cross carrier scheduling.
- the counter DAI is not supported in the FDD of the existing system (before Rel. 12). Therefore, Rel. Even in the 13 FDDs, it is assumed that the DL assignment received at least in the common search space does not include the counter DAI. Similarly, it is assumed that the UL grant received by the user terminal in the common search space is not included in the UL DAI.
- the common search space is an area in which all user terminals receive and attempt a decoding process in the area set for the downlink control channel.
- the counter DAI included in the UE-specific DL assignment it is assumed that different numbers of bits are set according to the number of CCs and the type of DL assignment as shown in the first mode.
- the In the second mode a HARQ-ACK feedback control method (determination of counter DAI, determination of codebook size, etc.) when the user terminal receives a plurality of counters DAI having different numbers of bits will be described.
- a user terminal that is scheduled for PDSCH (for example, UE-specific PDSCH) by DL assignment not including counter DAI performs HARQ-ACK feedback assuming that the value of counter DAI is 1 Can do.
- the UL grant received by the user terminal in the common search space is configured not to include UL DAI. For this reason, when the radio base station performs the PUell scheduling of the PCell with the UL grant of the common search space, the user terminal detects the UL grant that does not include the UL DAI.
- a user terminal on which a PUSCH (for example, a UE-specific PUSCH) is scheduled by a UL grant that does not include the UL DAI cannot determine the codebook size based on the UL DAI. Therefore, the user terminal can be configured to determine the HARQ-ACK codebook size based on other conditions.
- the user terminal can be configured to feed back HARQ-ACK of all CCs configured in the user terminal. That is, the user terminal performs HARQ-ACK feedback using the maximum HARQ-ACK codebook size based on the set number of CCs. This corresponds to the HARQ-ACK feedback method of the existing CA system.
- the codebook of HARQ-ACK is semi-fixed, so the base station has a simple configuration (assuming a plurality of different codebook sizes). HARQ-ACK can be received (without applying the above decoding).
- the user terminal can be configured to feed back only the PCRQ HARQ-ACK. That is, the user terminal performs HARQ-ACK feedback using the minimum HARQ-ACK codebook size regardless of the set number of CCs. This corresponds to the HARQ-ACK feedback method of the existing non-CA system.
- the radio base station can receive HARQ-ACK with a simple configuration (without applying decoding assuming a plurality of different codebook sizes).
- the user terminal can determine the HARQ-ACK codebook size based on the UL DAI.
- the HARQ-ACK codebook size can be dynamically controlled.
- a DL assignment / UL grant transmitted in at least a common search space includes a 2-bit counter DAI.
- the radio base station performs PDSCH / PUSCH scheduling of the primary cell (PCell) with DL assignment / UL grant in the common search space
- the user terminal detects the DL assignment / UL grant including 2-bit DAI. Will be.
- a case is assumed where scheduling is performed with a DL assignment / UL grant of a common search space of PCell and a DL assignment / UL grant of SCell (for example, UE specific search space).
- the user terminal may detect a DL assignment / UL grant including DAI having a different number of bits.
- the user terminal when only a 2-bit counter DAI (DL DAI) is included in the DL assignment for scheduling the PDSCH, the user terminal performs the HARQ-ACK code as in the case of CA non-application (Non-CA).
- DL DAI 2-bit counter DAI
- Non-CA CA non-application
- a DL assignment for scheduling PDSCH includes a 2-bit counter DAI and a 3- to 5-bit counter DAI
- the user terminal performs HARQ-ACK based on the 3- to 5-bit counter DAI.
- the codebook size can be determined.
- the counter DAI included in the DL assignment received by the user terminal is taken into account, and the counter DAI received by the user terminal is appropriately interpreted by determining the coat book size and the like based on the above-described conditions.
- HARQ-ACK feedback can be appropriately performed.
- the user terminal controls the UL transmission by selecting a predetermined PUCCH format based on the number of bits required for the uplink control information. For example, in HARQ-ACK transmission, it is conceivable that the user terminal switches the PUCCH format in accordance with the HARQ-ACK codebook size determined based on the counter DAI.
- the user terminal may transmit with a codebook having a size different from the HARQ-ACK codebook assumed by the radio base station.
- the user terminal may perform HARQ-ACK transmission with a PUCCH format different from the PUCCH format assumed by the radio base station. If the PUCCH format used by the user terminal for HARQ-ACK transmission is not properly determined, it is difficult for the radio base station to flexibly control the PUCCH resource.
- FIG. 5 shows an example of a case where the radio base station includes a counter DAI and an ARI indicating a PUCCH resource in downlink control information (DL assignment) and notifies the user terminal.
- FIG. 5A shows a table in which different PUCCH resources respectively used in different PUCCH formats are defined for a predetermined bit value of ARI.
- the radio base station sets a PUCCH resource (ARI) assuming that there is HARQ-ACK feedback using a predetermined PUCCH format from the user terminal based on the number of CCs to be scheduled and the like.
- FIG. 5B shows a case where DL transmission of 15 CCs is scheduled in a certain subframe among the 20 CCs set in the user terminal.
- FIG. 5C shows the number of CCs received by the user terminal (here, 5) with respect to the CC scheduled in FIG. 5B.
- the user terminal may perform HARQ-ACK transmission using a PUCCH format different from the PUCCH format (PUCCH resource) assumed by the radio base station.
- PUCCH resource PUCCH resource
- the DL assignment for scheduling a DL signal (for example, PDSCH) is notified to the user terminal including information indicating a predetermined PUCCH format (PUCCH format indicator, PF indicator).
- the user terminal can select a predetermined PUCCH format based on the PUCCH format information included in the DL assignment regardless of the counter DAI (or the number of received CCs).
- PUCCH format information can be information indicating either PUCCH format 3 or PUCCH format 4/5.
- the PUCCH format indicator can be composed of 1 bit.
- the PUCCH format and the number of bits that can be specified by the PUCCH format indicator are not limited to this.
- the PUCCH format indicator (for example, 1 bit) can be configured to be included in a predetermined DL assignment. For example, it may be configured to be added to a DL assignment for a user terminal in which HARQ-ACK / SR transmission of 23 bits or more can occur. Or it is good also as a structure added to the DL assignment with respect to the user terminal by which the PUCCH resource of PUCCH format 4/5 was configured.
- the user terminal transmits HARQ-ACK using the PUCCH format specified by the PUCCH format indicator regardless of the number of bits of HARQ-ACK.
- the user terminal may determine the HARQ-ACK codebook size based on the value of the counter DAI.
- the user terminal may determine the PUCCH resource based on the PUCCH format specified by the PUCCH format indicator and the bit information specified by the ARI (see FIG. 6).
- FIG. 7 shows a case where a radio base station includes a counter DAI, an ARI indicating a PUCCH resource, and a PUCCH format indicator indicating a predetermined PUCCH format in downlink control information (DL assignment) and notifies the user terminal.
- a radio base station includes a counter DAI, an ARI indicating a PUCCH resource, and a PUCCH format indicator indicating a predetermined PUCCH format in downlink control information (DL assignment) and notifies the user terminal.
- An example is shown.
- FIG. 7A shows a table in which the PUCCH format selected by the bit value of PUCCH format indicator (here, 1 bit) is defined.
- FIG. 7B shows a case where DL transmission of 15 CCs is scheduled in a certain subframe among the 20 CCs set in the user terminal.
- FIG. 7C shows the number of CCs received by the user terminal (here, 5) for the CCs scheduled in FIG. 7B.
- the user terminal selects the PUCCH format (here, PF4 / 5) indicated by the PUCCH format indicator (“1”) regardless of the number of CCs received (or the value of the counter DAI).
- the radio base station can flexibly control the allocation of the PUCCH resource to each user terminal, and can improve the utilization efficiency of the PUCCH resource.
- wireless communication system Wireless communication system
- the radio communication method according to each of the above aspects is applied.
- wireless communication method which concerns on each said aspect may be applied independently, respectively, and may be applied in combination.
- the radio communication system 1 shown in FIG. 8 includes a radio base station 11 that forms a macro cell C1, and radio base stations 12a to 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. In addition, the user terminal 20 can apply CA or DC using a plurality of cells (CC) (for example, six 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 compatible with various communication methods such as LTE and LTE-A, and may include not only a mobile communication terminal but also a fixed communication terminal.
- 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 downlink control channels (PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), etc. Including. 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 information (ACK / NACK) for PUSCH is transmitted by PHICH.
- 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 shared by each user terminal 20
- an uplink control channel PUCCH: Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- User data and higher layer control information are transmitted by the PUSCH.
- Uplink control information including at least one of delivery confirmation information (ACK / NACK) and radio quality information (CQI) is transmitted by PUSCH or PUCCH.
- a random access preamble for establishing connection with a cell is transmitted by the PRACH.
- FIG. 9 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, HARQ (Hybrid Automatic Repeat reQuest) transmission processing
- HARQ Hybrid Automatic Repeat reQuest
- 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 (transmission unit) 103 can perform DL transmission from a plurality of CCs, and can transmit predetermined downlink control information including a counter DAI of 3 bits or more. Further, the transmission / reception unit (reception unit) 103 receives HARQ-ACK fed back by the user terminal with respect to DL transmission.
- 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) processing, and error correction on user data included in the input upstream signal. 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 and receives (backhaul signaling) signals to and from the adjacent radio base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). Also good.
- CPRI Common Public Radio Interface
- X2 interface also good.
- FIG. 10 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 10 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 illustrated in FIG. 10, 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 301 controls retransmission / downlink data transmission of downlink data based on a delivery confirmation signal (HARQ-ACK) fed back from the user terminal. Also, the control unit 301 controls HARQ-ACK reception processing in which a user terminal feeds back DL transmission based on a bundling window. Note that the reception processing may be performed by the reception signal processing unit 304 based on an instruction from the control unit 301.
- 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 (including a downlink data signal and a downlink control signal) based on an instruction from the control unit 301 and outputs the DL signal to the mapping unit 303.
- transmission signal generation section 302 generates a downlink data signal (PDSCH) including user data and outputs it to mapping section 303.
- the transmission signal generation unit 302 generates a downlink control signal (PDCCH / EPDCCH) including DCI (UL grant) and outputs the downlink control signal (PDCCH / EPDCCH) to the mapping unit 303.
- the transmission signal generation unit 302 generates downlink reference signals such as CRS and CSI-RS, and outputs them to the mapping unit 303.
- 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 DL 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 the DL signal 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, decoding, etc.) on the UL signal (HARQ-ACK, PUSCH, etc.) transmitted from the user terminal 20.
- the processing result is output to the control unit 301.
- the reception signal processing unit 304 may be configured by 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. 11 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 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 (reception unit) 203 receives DL signals transmitted from a plurality of component carriers (CCs). Further, the transmission / reception unit (reception unit) 203 can receive the counter DAI set to 3 bits or more via predetermined downlink control information.
- 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. It 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. 12 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment.
- FIG. 12 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.
- 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 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 generates an uplink control signal (for example, an acknowledgment signal (HARQ-ACK)) or an uplink data signal based on a downlink control signal, a result of determining whether retransmission control is necessary for the downlink data signal, or the like.
- HARQ-ACK acknowledgment signal
- the control unit 401 can control the transmission signal generation unit 402, the mapping unit 403, and the reception signal processing unit 404.
- the control unit 401 controls HARQ-ACK transmission for the received DL signal based on the counter DAI included in the downlink control information.
- the counter DAI can be configured such that different numbers of bits are applied based on the number of CCs set in the user terminal or the number of CCs to which listening is applied to DL transmission (see FIG. 4).
- the counter DAI may have a configuration in which a different number of bits is applied based on the type of CC in which the downlink shared channel scheduled by the downlink control information including the counter DAI is transmitted (received).
- the counter DAI can be configured such that different numbers of bits are applied based on the type of CC to which the downlink control information including the counter DAI is transmitted (received).
- the control unit 401 when the uplink shared channel is scheduled with a UL grant that does not include UL DAI, the control unit 401 multiplexes HARQ-ACK on the uplink shared channel and schedules a downlink shared channel corresponding to the HARQ-ACK.
- the HARQ-ACK codebook size can be determined based on the maximum value of the counter DAI of the downlink control 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.
- 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 reception signal processing unit 404 may be configured by 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. 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 determination result to the control unit 401.
- ACK / NACK retransmission control determination
- ACK / NACK retransmission control determination
- the determination part 405 can be comprised from the determination circuit or determination apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
- each functional block (components) are realized by any combination of hardware and / or software.
- the means for realizing each functional block is not particularly limited. That is, each functional block may be 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.
- 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. 13 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 physically include a central processing unit (processor) 1001, a main storage device (memory) 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, You may comprise as a computer apparatus containing the bus
- the term “apparatus” can be read as a circuit, a device, a unit, or the like.
- Each function in the radio base station 10 and the user terminal 20 is performed by causing the central processing unit 1001 to perform computation by reading predetermined software (program) on hardware such as the central processing unit 1001 and the main storage device 1002. This is realized by controlling communication by the device 1004 and reading and / or writing of data in the main storage device 1002 and the auxiliary storage device 1003.
- the central processing unit 1001 controls the entire computer by operating an operating system, for example.
- the central processing unit 1001 may be configured by a processor (CPU: Central Processing Unit) including a control device, an arithmetic device, a register, an interface with peripheral devices, 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 central processing unit 1001.
- the central processing unit 1001 reads programs, software modules, and data from the auxiliary storage device 1003 and / or the communication device 1004 to the main storage device 1002, and executes various processes according to these.
- the program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the main storage device 1002 and operating on the central processing unit 1001, and may be realized similarly for other functional blocks.
- the main storage device (memory) 1002 is a computer-readable recording medium, and may be configured by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), RAM (Random Access Memory), and the like.
- the auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of a flexible disk, a magneto-optical disk, a CD-ROM (Compact Disc ROM), a hard disk drive, and the like.
- 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.
- a network device for example, 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, etc.) that accepts external input.
- the output device 1006 is an output device (for example, a display, a speaker, 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 central processing unit 1001 and the main storage device 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 hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of the devices illustrated in the figure, or may be configured not to include some devices. .
- the radio base station 10 and the user terminal 20 may be configured to include hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). Thus, a part or all of each functional block may be realized.
- ASIC Application Specific Integrated Circuit
- PLD Process-Demand Generation
- FPGA Field Programmable Gate Array
- the channel and / or symbol may be a signal (signaling).
- the signal may be a message.
- a component carrier CC may be called a cell, a frequency carrier, a carrier frequency, or the like.
- 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.
- software, instructions, information, etc. may be transmitted / received via a transmission medium.
- software may use websites, servers, or other devices using wired technology (coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.) When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.
- notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, by not performing notification of the predetermined information). May be.
- notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods.
- notification of information includes physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, broadcast information (MIB (Master Information Block)). ), SIB (System Information Block)), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
- 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.
- 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), 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), systems using other appropriate systems and / or extended based on these It may be applied to the next generation system.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- communication system 5G (5th generation mobile communication system
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Abstract
Description
第1の態様では、所定のDLアサイメントに含まれるカウンタDAIのビット数を所定値(例えば、3ビット)以上とする場合について説明する。また、カウンタDAIのビット数を所定条件に基づいて異なる値に設定する場合について説明する。
複数のDLアサイメントに対して異なるビット数のカウンタDAIが設定される場合、ユーザ端末が複数のDLアサイメントを受信すると異なるビット数(0を含む)のカウンタDAIを受信する可能性がある。かかる場合、ユーザ端末がどのようにDAIを解釈してHARQ-ACKフィードバック等を制御するかが問題となる。
上述したように、FDDにおいて共通サーチスペースを介してユーザ端末が受信するDLアサイメントには、カウンタDAIが含まれない構成となることが想定される。このため、無線基地局が共通サーチスペースのDLアサイメントでプライマリセル(PCell)のPDSCHのスケジューリングを行う場合、ユーザ端末はカウンタDAIが含まれないDLアサイメントを検出することとなる。
上述したように、TDDでは、少なくとも共通サーチスペースで送信されるDLアサイメント/ULグラントには、2ビットのカウンタDAIが含まれた構成となることが想定される。このため、無線基地局が共通サーチスペースのDLアサイメント/ULグラントでプライマリセル(PCell)のPDSCH/PUSCHのスケジューリングを行う場合、ユーザ端末は2ビットのDAIを含むDLアサイメント/ULグラントを検出することとなる。
第3の態様では、ユーザ端末がHARQ-ACK送信に適用する上り制御チャネルフォーマット(PUCCHフォーマット)の選択方法について説明する。
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、上記各態様に係る無線通信方法が適用される。なお、上記各態様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、組み合わせて適用されてもよい。
図9は、本発明の一実施形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インターフェース106とを備えている。なお、送受信部103は、送信部及び受信部で構成される。
図11は、本発明の一実施形態に係る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。
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、物理的に分離した2つ以上の装置を有線又は無線で接続し、これら複数の装置により実現されてもよい。
Claims (10)
- 複数のコンポーネントキャリア(CC:Component Carrier)から送信されるDL信号を受信する受信部と、
受信したDL信号に対するHARQ-ACKの送信を下り制御情報に含まれるカウンタDAIに基づいて制御する制御部と、を有し、
前記カウンタDAIは所定の下り制御情報において3ビット以上に設定されることを特徴とするユーザ端末。 - 前記カウンタDAIは、ユーザ端末に設定されるCC数又はDL送信にリスニングを適用するCC数に基づいて異なるビット数が適用されることを特徴とする請求項1に記載のユーザ端末。
- 前記カウンタDAIは、当該カウンタDAIが含まれる下り制御情報がスケジューリングする下り共有チャネルが送信されるCCの種別に基づいて異なるビット数が適用されることを特徴とする請求項1又は請求項2に記載のユーザ端末。
- 前記カウンタDAIは、当該カウンタDAIが含まれる下り制御情報が送信されるCCの種別に基づいて異なるビット数が適用されることを特徴とする請求項1又は請求項2に記載のユーザ端末。
- 前記制御部は、カウンタDAIを含まない下り制御情報で下り共有チャネルをスケジューリングされた場合、カウンタDAIが所定値であると想定して当該下り共有チャネルに対するHARQ-ACK送信を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、UL DAIを含まないULグラントで上り共有チャネルをスケジューリングされた場合、当該上り共有チャネルにHARQ-ACKを多重すると共に、当該HARQ-ACKに対応する下り共有チャネルをスケジューリングした下り制御情報のカウンタDAIの最大値に基づいてHARQ-ACKコードブックサイズを決定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。
- 前記制御部は、各CCから受信した複数の下り制御情報に含まれるカウンタDAIのビット数が異なる場合、ビット数が最も大きいカウンタDAIに基づいてHARQ-ACK送信を制御することを特徴とする請求項1から請求項6のいずれかに記載のユーザ端末。
- 前記制御部は、下り制御情報に含まれる所定の上り制御チャネルフォーマットを示す情報に基づいてHARQ-ACK送信に適用する上り制御チャネルフォーマットを決定することを特徴とする請求項1から請求項7のいずれかに記載のユーザ端末。
- 複数のコンポーネントキャリア(CC:Component Carrier)を利用可能なユーザ端末と通信を行う無線基地局であって、
各CCからDL送信を行う送信部と、
前記DL送信に対して前記ユーザ端末がフィードバックするHARQ-ACKを受信する受信部と、を有し、
前記送信部は、所定の下り制御情報に3ビット以上のカウンタDAIを含めて送信することを特徴とする無線基地局。 - 複数のコンポーネントキャリア(CC:Component Carrier)を利用可能なユーザ端末の無線通信方法であって、
複数のCCから送信されるDL信号を受信する工程と、
受信したDL信号に対するHARQ-ACKの送信を下り制御情報に含まれるカウンタDAIに基づいて制御する工程と、を有し、
前記カウンタDAIは所定の下り制御情報において3ビット以上に設定されることを特徴とする無線通信方法。
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CN201680064573.8A CN108353312B (zh) | 2015-11-05 | 2016-11-02 | 用户终端、无线基站以及无线通信方法 |
EP19219830.7A EP3654562A1 (en) | 2015-11-05 | 2016-11-02 | User terminal, radio base station and radio communication method |
MX2018005526A MX2018005526A (es) | 2015-11-05 | 2016-11-02 | Terminal de usuario, estacion base de radio y metodo de comunicacion de radio. |
US15/772,915 US10841066B2 (en) | 2015-11-05 | 2016-11-02 | Terminal configured for feedback transmission |
EP16862093.8A EP3364582A4 (en) | 2015-11-05 | 2016-11-02 | User terminal, wireless base station, and wireless communication method |
EP19157146.2A EP3503446A1 (en) | 2015-11-05 | 2016-11-02 | User terminal, radio base station and radio communication method |
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Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
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Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103414533B (zh) * | 2007-09-28 | 2016-08-10 | Lg电子株式会社 | 在无线通信系统中检测控制信息的方法及设备 |
CN102804867B (zh) * | 2009-06-16 | 2016-07-27 | 夏普株式会社 | 移动站装置、基站装置以及无线通信方法 |
US9106419B2 (en) * | 2010-08-16 | 2015-08-11 | Qualcomm Incorporated | ACK/NACK transmission for multi-carrier operation with downlink assignment index |
KR101771550B1 (ko) * | 2010-10-15 | 2017-08-29 | 주식회사 골드피크이노베이션즈 | Ack/nack 신호 송수신 방법 및 장치 |
US9578627B2 (en) * | 2010-11-02 | 2017-02-21 | Lg Electronics Inc. | Method and device for transmitting/receiving uplink control information in wireless communication system |
KR101825638B1 (ko) * | 2011-01-19 | 2018-02-05 | 주식회사 팬택 | Harq ack/nack 신호 전송을 위한 자원 할당 방법 및 이를 이용한 harq ack/nack 신호 전송 방법과 장치 |
WO2012108685A2 (ko) * | 2011-02-10 | 2012-08-16 | 주식회사 팬택 | Ack/nack 자원 할당 방법 및 장치와 이를 이용한 ack/nack 신호 송신 방법 |
EP2966800A1 (en) * | 2011-04-29 | 2016-01-13 | Interdigital Patent Holdings, Inc. | Carrier aggregation with subframe restrictions |
JP6096760B2 (ja) * | 2012-08-02 | 2017-03-15 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカPanasonic Intellectual Property Corporation of America | 基地局装置、端末装置、リソース割当方法及び応答信号送信方法 |
JP2015217988A (ja) | 2014-05-15 | 2015-12-07 | 博子 大西 | 指掛け付紙製コップ |
-
2016
- 2016-11-02 CN CN201680064573.8A patent/CN108353312B/zh active Active
- 2016-11-02 EP EP16862093.8A patent/EP3364582A4/en not_active Withdrawn
- 2016-11-02 WO PCT/JP2016/082502 patent/WO2017078033A1/ja active Application Filing
- 2016-11-02 MX MX2018005526A patent/MX2018005526A/es unknown
- 2016-11-02 US US15/772,915 patent/US10841066B2/en active Active
- 2016-11-02 EP EP19157146.2A patent/EP3503446A1/en not_active Withdrawn
- 2016-11-02 JP JP2017548785A patent/JP6467066B2/ja active Active
- 2016-11-02 EP EP19219830.7A patent/EP3654562A1/en not_active Withdrawn
-
2018
- 2018-11-27 JP JP2018220817A patent/JP6703083B2/ja active Active
Non-Patent Citations (6)
Title |
---|
HUAWEI ET AL.: "WF on DAI based solution for dynamic HARQ-ACK codebook", 3GPP TSG-RAN WG1#82B R1- 156227, pages 2, XP051044658 * |
LG ELECTRONICS: "Way Forward on PUCCH format adaptation for HARQ-ACK", 3GPP TSG-RAN WG1#82B RL-156132, 7 October 2015 (2015-10-07), pages 3, XP051044191 * |
NTT DOCOMO, INC: "WF on dynamic adaptation of HARQ-ACK transmission", 3GPP TSG-RAN WG1#82B R1- 156126, pages 3, XP051044627 * |
SAMSUNG: "DAI transmission for LTE-A TDD", 3GPP TSG-RAN WG1#59B R1-100099, 12 January 2010 (2010-01-12), XP050417834 * |
SAMSUNG: "Need for DAI and HARQ-ACK Transmission Aspects with CA", 3GPP TSG-RAN WG1#62 R1-104576, 17 August 2010 (2010-08-17), XP050449872 * |
See also references of EP3364582A4 * |
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Also Published As
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EP3364582A1 (en) | 2018-08-22 |
US20180323938A1 (en) | 2018-11-08 |
EP3654562A1 (en) | 2020-05-20 |
US10841066B2 (en) | 2020-11-17 |
JP6703083B2 (ja) | 2020-06-03 |
JP2019050619A (ja) | 2019-03-28 |
EP3364582A4 (en) | 2018-08-22 |
JP6467066B2 (ja) | 2019-02-06 |
MX2018005526A (es) | 2018-08-01 |
CN108353312B (zh) | 2021-08-24 |
EP3503446A1 (en) | 2019-06-26 |
CN108353312A (zh) | 2018-07-31 |
JPWO2017078033A1 (ja) | 2018-09-20 |
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