WO2012124959A2 - Procédé et dispositif de transmission d'ack/nack dans un système de communication sans fil fondé sur tdd - Google Patents

Procédé et dispositif de transmission d'ack/nack dans un système de communication sans fil fondé sur tdd Download PDF

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WO2012124959A2
WO2012124959A2 PCT/KR2012/001788 KR2012001788W WO2012124959A2 WO 2012124959 A2 WO2012124959 A2 WO 2012124959A2 KR 2012001788 W KR2012001788 W KR 2012001788W WO 2012124959 A2 WO2012124959 A2 WO 2012124959A2
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subframe
serving cell
nack
ack
uplink
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PCT/KR2012/001788
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English (en)
Korean (ko)
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WO2012124959A3 (fr
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서동연
김민규
서한별
안준기
양석철
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엘지전자 주식회사
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Publication of WO2012124959A3 publication Critical patent/WO2012124959A3/fr

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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
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting a reception acknowledgment for a hybrid automatic repeat request (HARQ) in a time division duplex (TDD) based wireless communication system.
  • HARQ hybrid automatic repeat request
  • TDD time division duplex
  • LTE Long term evolution
  • 3GPP 3rd Generation Partnership Project
  • TS Technical Specification
  • the physical channel in LTE is a downlink channel PDSCH (Physical Downlink) It may be divided into a shared channel (PDCCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) which are uplink channels.
  • PDSCH Physical Downlink
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PUCCH is an uplink control channel used for transmission of uplink control information such as a hybrid automatic repeat request (HARQ) acknowledgment / not-acknowledgement (ACK / NACK) signal, a channel quality indicator (CQI), and a scheduling request (SR).
  • HARQ hybrid automatic repeat request
  • ACK / NACK acknowledgment / not-acknowledgement
  • CQI channel quality indicator
  • SR scheduling request
  • 3GPP LTE-A (advanced) is an evolution of 3GPP LTE.
  • a technology introduced in 3GPP LTE-A includes carrier aggregation.
  • Carrier aggregation uses a plurality of component carriers.
  • Component carriers are defined by center frequency and bandwidth.
  • One downlink component carrier or a pair of an uplink component carrier and a downlink component carrier corresponds to one cell.
  • a terminal receiving a service using a plurality of downlink component carriers may be said to receive a service from a plurality of serving cells.
  • TDD time division duplex
  • one or more downlink subframes are associated with an uplink subframe.
  • 'Connection' means that transmission / reception in a downlink subframe is connected with transmission / reception in an uplink subframe.
  • the UE transmits HARQ ACK / NACK (hereinafter, referred to as ACK / NACK) for the transport block in an uplink subframe connected to the plurality of downlink subframes. do.
  • ACK / NACK HARQ ACK / NACK
  • a plurality of serving cells may be introduced in a TDD system. That is, a plurality of serving cells may be allocated to the terminal.
  • UL-DL configuration is information indicating whether each subframe in a radio frame used for TDD is an uplink subframe or a downlink subframe.
  • next generation wireless communication systems also consider using different UL-DL configurations for each serving cell. In this case, it is a question of how to transmit ACK / NACK.
  • An object of the present invention is to provide an ACK / NACK transmission method and apparatus in a time division duplex (TDD) based wireless communication system.
  • TDD time division duplex
  • a method of performing a hybrid automatic repeat request (HARQ) of a terminal configured with a plurality of serving cells includes receiving uplink-downlink (UL-DL) configuration information for a time division duplex (TDD) radio frame used in the first serving cell and the second serving cell via a first serving cell; Receiving data in subframe n of the second serving cell; And transmitting an ACK / NACK (acknowledgement / not-acknowledgement) signal for the data in subframe n + k SCC (n) of the first serving cell connected to subframe n of the second serving cell.
  • UL-DL uplink-downlink
  • TDD time division duplex
  • the UL-DL configuration applied to the first serving cell indicated by the uplink-downlink (UL-DL) configuration information and the UL-DL configuration applied to the second serving cell are different from each other.
  • the number of downlink subframes of the second serving cell connected to n + k SCC (n) may be less than or equal to a predetermined number.
  • the predetermined number is included in the number of downlink subframes included in the TDD radio frame including the downlink subframes of the second serving cell and the TDD radio frame including the subframe n + k SCC (n). It may be determined based on the number of uplink subframes.
  • the method includes receiving data in subframe n of the first serving cell; And transmitting an ACK / NACK (acknowledgement / not-acknowledgement) signal in subframe n + k PCC (n) of the first serving cell connected to subframe n of the first serving cell.
  • the frame n + k PCC (n) may be the first uplink subframe among the uplink subframes of the first serving cell spaced at least 4 subframes from the subframe n of the first serving cell.
  • Transmitting the ACK / NACK (acknowledgement / not- acknowledgement) signal in subframe n + k PCC (n) of the first serving cell is the subframe n + k PCC (n) of the first serving cell is the An uplink subframe is configured by UL-DL configuration applied to a first serving cell, and subframe n + k PCC (n) of the second serving cell is also applied to a UL-DL configuration applied to the second serving cell. It may be performed when it is configured as an uplink subframe.
  • the first serving cell may be a primary cell in which the terminal performs an initial connection establishment procedure or a connection reestablishment procedure with a base station.
  • the second serving cell may be a secondary cell additionally allocated to the terminal in addition to the primary cell.
  • a method of performing a hybrid automatic repeat request (HARQ) of a terminal configured with a plurality of serving cells includes receiving uplink-downlink (UL-DL) configuration information for a time division duplex (TDD) radio frame used in the first serving cell and the second serving cell via a first serving cell; Receiving data in subframe n of the second serving cell; And transmitting an ACK / NACK (acknowledgement / not-acknowledgement) signal for the data in subframe n + k SCC (n) of the first serving cell connected to subframe n of the second serving cell.
  • UL-DL uplink-downlink
  • TDD time division duplex
  • n + k SCC (n) is characterized in that the first uplink subframe of the uplink subframes of the first serving cell spaced at least 4 subframes from the subframe n of the second serving cell.
  • provided terminal includes a radio frequency (RF) unit for transmitting and receiving a radio signal; And a processor connected to the RF unit, wherein the processor includes an uplink-downlink for a time division duplex (TDD) radio frame used in the first serving cell and the second serving cell through a first serving cell; UL-DL) configuration information is received, data is received in subframe n of the second serving cell, and subframe n + k SCC of the first serving cell connected to subframe n of the second serving cell.
  • TDD time division duplex
  • n transmits an ACK / NACK (acknowledgement / not-acknowledgement) signal for the data, but is applied to the first serving cell indicated by the uplink-downlink (UL-DL) configuration information;
  • the configuration and the UL-DL configuration applied to the second serving cell are different from each other, and the number of downlink subframes of the second serving cell connected to the subframe n + k SCC (n) is less than or equal to a predetermined number. do.
  • TDD time division duplex
  • FIG. 1 shows a structure of a radio frame.
  • FIG. 2 shows a structure of a TDD radio frame.
  • FIG 3 shows an example of a resource grid for one downlink slot.
  • 5 shows a structure of an uplink subframe.
  • FIG. 6 shows a channel structure of PUCCH format 1b in a normal CP.
  • FIG. 7 shows a channel structure of a PUCCH format 2 / 2a / 2b in a normal CP.
  • FIG. 8 illustrates block spreading based E (enhanced) -PUCCH format.
  • 9 is a comparative example of a single carrier system and a carrier aggregation system.
  • FIG. 10 shows an example in which different UL-DL configurations are applied to a plurality of serving cells.
  • FIG. 11 shows a method of operating HARQ according to an embodiment of the present invention.
  • FIG. 12 illustrates a method of operating HARQ according to another embodiment of the present invention.
  • FIG. 13 is a block diagram illustrating a wireless device in which an embodiment of the present invention is implemented.
  • the user equipment may be fixed or mobile, and may include a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, and a personal digital assistant (PDA). It may be called other terms such as digital assistant, wireless modem, handheld device.
  • MS mobile station
  • MT mobile terminal
  • UT user terminal
  • SS subscriber station
  • PDA personal digital assistant
  • a base station generally refers to a fixed station communicating with a terminal, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • access point an access point
  • the communication from the base station to the terminal is called downlink (DL), and the communication from the terminal to the base station is called uplink (UL).
  • DL downlink
  • UL uplink
  • the wireless communication system including the base station and the terminal may be a time division duplex (TDD) system or a frequency division duplex (FDD) system.
  • TDD system is a wireless communication system that performs uplink and downlink transmission and reception using different times in the same frequency band.
  • the FDD system is a wireless communication system capable of transmitting and receiving uplink and downlink simultaneously using different frequency bands.
  • the wireless communication system can perform communication using a radio frame.
  • FIG. 1 shows a structure of a radio frame.
  • a radio frame includes 10 subframes, and one subframe includes two consecutive slots. Slots included in the radio frame are indexed from 0 to 19.
  • the time taken for one subframe to be transmitted is called a transmission time interval (TTI), and the TTI may be a minimum scheduling unit.
  • TTI transmission time interval
  • one subframe may have a length of 1 ms
  • one slot may have a length of 0.5 ms.
  • FIG. 2 shows a structure of a TDD radio frame.
  • a subframe having an index # 1 and an index # 6 is called a special subframe, and includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UPPTS). ).
  • DwPTS is used for initial cell search, synchronization or channel estimation at the terminal.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • GP is a section for removing interference caused in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • DL subframe In TDD, a downlink (DL) subframe and an uplink (UL) subframe coexist in one radio frame.
  • Table 1 shows an example of a UL-DL configuration of a radio frame.
  • 'D' represents a DL subframe
  • 'U' represents a UL subframe
  • 'S' represents a special subframe.
  • the terminal may know whether each subframe is a DL subframe or a UL subframe in a radio frame.
  • the UL-DL configuration N (N is any one of 0 to 6) may refer to Table 1 above.
  • FIG 3 shows an example of a resource grid for one downlink slot.
  • the downlink slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and N RB resource blocks (RBs) in the frequency domain.
  • the RB includes one slot in the time domain and a plurality of consecutive subcarriers in the frequency domain in resource allocation units.
  • the number N RB of resource blocks included in the downlink slot depends on the downlink transmission bandwidth N DL configured in the cell. For example, in the LTE system, N RB may be any one of 6 to 110.
  • the structure of the uplink slot may also be the same as that of the downlink slot.
  • Each element on the resource grid is called a resource element (RE).
  • one resource block includes 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain to include 7 ⁇ 12 resource elements, but the number of OFDM symbols and the number of subcarriers in the resource block is exemplarily described. It is not limited to this.
  • the number of OFDM symbols and the number of subcarriers can be variously changed according to the length of the CP, frequency spacing, and the like.
  • the number of subcarriers in one OFDM symbol may be selected and used among 128, 256, 512, 1024, 1536 and 2048.
  • a downlink (DL) subframe is divided into a control region and a data region in the time domain.
  • the control region includes up to three OFDM symbols (up to four in some cases) of the first slot in the subframe, but the number of OFDM symbols included in the control region may be changed.
  • a physical downlink control channel (PDCCH) and another control channel are allocated to the control region, and a physical downlink shared channel (PDSCH) is allocated to the data region.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • a physical channel is a physical downlink shared channel (PDSCH), a physical downlink shared channel (PUSCH), a physical downlink control channel (PDCCH), and a physical channel (PCFICH). It may be divided into a Control Format Indicator Channel (PHICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), and a Physical Uplink Control Channel (PUCCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • PCFICH physical channel
  • the PCFICH transmitted in the first OFDM symbol of a subframe carries a control format indicator (CFI) regarding the number of OFDM symbols (that is, the size of the control region) used for transmission of control channels in the subframe.
  • CFI control format indicator
  • the terminal first receives the CFI on the PCFICH, and then monitors the PDCCH. Unlike the PDCCH, the PCFICH does not use blind decoding and is transmitted on a fixed PCFICH resource of a subframe.
  • the PHICH carries a positive-acknowledgement (ACK) / negative-acknowledgement (NACK) signal for an uplink hybrid automatic repeat request (HARQ).
  • ACK positive-acknowledgement
  • NACK negative-acknowledgement
  • HARQ uplink hybrid automatic repeat request
  • the Physical Broadcast Channel (PBCH) is transmitted in the preceding four OFDM symbols of the second slot of the first subframe of the radio frame.
  • the PBCH carries system information necessary for the terminal to communicate with the base station, and the system information transmitted through the PBCH is called a master information block (MIB).
  • MIB master information block
  • SIB system information block
  • DCI downlink control information
  • PDSCH also called DL grant
  • PUSCH resource allocation also called UL grant
  • VoIP Voice over Internet Protocol
  • 5 shows a structure of an uplink subframe.
  • the uplink subframe is allocated a control region in which a physical uplink control channel (PUCCH) carrying uplink control information is allocated in a frequency domain and a physical uplink shared channel (PUSCH) carrying user data. It can be divided into data areas.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • PUCCH is allocated to an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the first slot and the second slot. RB pairs have the same resource block index m.
  • PUCCH supports multiple formats.
  • a PUCCH having a different number of bits per subframe may be used according to a modulation scheme dependent on the PUCCH format.
  • Table 2 shows an example of a modulation scheme and the number of bits per subframe according to the PUCCH format.
  • PUCCH format 1 is used for transmission of SR (Scheduling Request)
  • PUCCH format 1a / 1b is used for transmission of ACK / NACK signal for HARQ
  • PUCCH format 2 is used for transmission of CQI
  • PUCCH format 2a / 2b is used for CQI and Used for simultaneous transmission of ACK / NACK signals.
  • PUCCH format 1a / 1b is used when transmitting only the ACK / NACK signal in the subframe
  • PUCCH format 1 is used when the SR is transmitted alone.
  • PUCCH format 1 is used, and an ACK / NACK signal is modulated and transmitted on a resource allocated to the SR.
  • All PUCCH formats use a cyclic shift (CS) of a sequence in each OFDM symbol.
  • the cyclically shifted sequence is generated by cyclically shifting a base sequence by a specific cyclic shift amount.
  • the specific CS amount is indicated by the cyclic shift index (CS index).
  • n is the element index
  • N is the length of the base sequence.
  • b (n) is defined in section 5.5 of 3GPP TS 36.211 V8.7.0.
  • the length of the sequence is equal to the number of elements included in the sequence. u may be determined by a cell identifier (ID), a slot number in a radio frame, or the like.
  • ID cell identifier
  • the length N of the base sequence is 12 since one resource block includes 12 subcarriers. Different base sequences define different base sequences.
  • the cyclically shifted sequence r (n, I cs ) may be generated by cyclically shifting the base sequence r (n) as shown in Equation 2 below.
  • I cs is a cyclic shift index indicating the CS amount (0 ⁇ I cs ⁇ N-1).
  • the available cyclic shift index of the base sequence refers to a cyclic shift index derived from the base sequence according to the CS interval. For example, if the length of the base sequence is 12 and the CS interval is 1, the total number of available cyclic shift indices of the base sequence is 12. Alternatively, if the length of the base sequence is 12 and the CS interval is 2, the total number of available cyclic shift indices of the base sequence is six.
  • FIG. 6 shows a channel structure of PUCCH format 1b in a normal CP.
  • One slot includes seven OFDM symbols, three OFDM symbols become RS (Reference Signal) OFDM symbols for the reference signal, and four OFDM symbols become data OFDM symbols for the ACK / NACK signal.
  • RS Reference Signal
  • modulation symbol d (0) is generated by modulating an encoded 2-bit ACK / NACK signal with Quadrature Phase Shift Keying (QPSK).
  • QPSK Quadrature Phase Shift Keying
  • the cyclic shift index I cs may vary depending on the slot number n s in the radio frame and / or the symbol index l in the slot.
  • the modulation symbol d (0) is spread to the cyclically shifted sequence r (n, I cs ).
  • r n, I cs .
  • the one-dimensional spread sequence may be spread using an orthogonal sequence.
  • An orthogonal sequence w i (k) (i is a sequence index, 0 ⁇ k ⁇ K ⁇ 1) having a spreading factor K 4 uses the following sequence.
  • Different spreading coefficients may be used for each slot.
  • the two-dimensional spreading sequence ⁇ s (0), s (1), s (2), s (3) ⁇ can be expressed as follows.
  • Two-dimensional spread sequences ⁇ s (0), s (1), s (2), s (3) ⁇ are transmitted in the corresponding OFDM symbol after IFFT is performed.
  • the ACK / NACK signal is transmitted on the PUCCH.
  • the reference signal of the PUCCH format 1b is also transmitted by cyclically shifting the base sequence r (n) and spreading it in an orthogonal sequence.
  • the cyclic shift indexes corresponding to three RS OFDM symbols are I cs4 , I cs5 , and I cs6 , three cyclically shifted sequences r (n, I cs4 ), r (n, I cs5 ), r (n, I cs6 ).
  • the orthogonal sequence index i, the cyclic shift index I cs, and the resource block index m are parameters necessary for configuring the PUCCH and resources used to distinguish the PUCCH (or terminal). If the number of available cyclic shifts is 12 and the number of available orthogonal sequence indexes is 3, PUCCHs for a total of 36 terminals may be multiplexed into one resource block.
  • resource index n (1) PUUCH is defined in order for the UE to obtain the three parameters for configuring the PUCCH.
  • Resource index n (1) PUUCH n CCE + N (1) PUUCH , where n CCE is the corresponding DCI (i.e., downlink resource allocation used for reception of downlink data corresponding to ACK / NACK signal) N (1) PUUCH is a parameter that the base station informs the user equipment by using a higher layer message.
  • the time, frequency, and code resources used for transmitting the ACK / NACK signal are called ACK / NACK resources or PUCCH resources.
  • the index of the ACK / NACK resource (referred to as the ACK / NACK resource index or the PUCCH index) required for transmitting the ACK / NACK signal on the PUCCH is orthogonal sequence index i, cyclic shift index I cs , and resource block index. m and at least one of the indices for obtaining the three indices.
  • the ACK / NACK resource may include at least one of an orthogonal sequence, a cyclic shift, a resource block, and a combination thereof.
  • FIG. 7 shows a channel structure of a PUCCH format 2 / 2a / 2b in a normal CP.
  • OFDM symbols 1 and 5 are used for a DM RS (demodulation reference signal), which is an uplink reference signal, and the remaining OFDM symbols are used for CQI transmission.
  • OFDM symbol 3 (fourth symbol) is used for the DM RS.
  • Ten CQI information bits are channel coded, for example, at a 1/2 code rate, resulting in 20 coded bits.
  • Reed-Muller code may be used for channel coding.
  • QPSK constellation mapping is performed to generate QPSK modulation symbols (d (0) to d (4) in slot 0).
  • Each QPSK modulation symbol is modulated with a cyclic shift of a basic RS sequence r (n) of length 12 and then IFFT and transmitted in each of the 10 SC-FDMA symbols in the subframe. 12 uniformly spaced cyclic shifts allow 12 different terminals to be orthogonally multiplexed in the same PUCCH resource block.
  • a basic RS sequence r (n) having a length of 12 may be used as a DM RS sequence applied to OFDM symbols 1 and 5.
  • FIG. 8 illustrates block spreading based E (enhanced) -PUCCH format.
  • the E-PUCCH format is also called PUCCH format 3.
  • an enhanced (PU) -PUCCH format is a PUCCH format using a block spreading technique.
  • the block spreading technique refers to a method of multiplexing a modulation symbol sequence obtained by modulating a multi-bit ACK / NACK using a block spreading code.
  • the block spreading technique may use the SC-FDMA scheme.
  • the SC-FDMA scheme refers to a transmission scheme in which IFFT is performed after DFT spreading.
  • a symbol sequence (eg, an ACK / NACK symbol sequence) is spread and transmitted in the time domain by a block spreading code.
  • An orthogonal cover code (OCC) may be used as the block spreading code.
  • Control signals of various terminals may be multiplexed by the block spreading code.
  • PUCCH format 2 one symbol sequence is transmitted over a time domain, and UE multiplexing is performed by using a cyclic shift of a constant amplitude zero auto-correlation (CAZAC) sequence.
  • CAZAC constant amplitude zero auto-correlation
  • the symbol sequence is transmitted over the frequency domain of each data symbol, and is spread in the time domain by a block spreading code to perform terminal multiplexing.
  • FIG. 8 a case of using two RS symbols in one slot is illustrated.
  • the present invention is not limited thereto, and an orthogonal cover code having three RS symbols and having a spreading factor value of 4 may be used.
  • the RS symbol may be generated from a CAZAC sequence having a specific cyclic shift, and may be transmitted in a form in which a plurality of RS symbols in a time domain are multiplied by a specific orthogonal cover code.
  • the carrier aggregation system is also called a multiple carrier system.
  • the 3GPP LTE system supports a case where the downlink bandwidth and the uplink bandwidth are set differently, but this assumes one component carrier (CC).
  • the 3GPP LTE system supports up to 20MHz and may have different uplink and downlink bandwidths, but only one CC is supported for each of the uplink and the downlink.
  • Carrier aggregation (or carrier aggregation, also referred to as spectrum aggregation) is to support a plurality of CC. For example, if five CCs are allocated as granularity in a carrier unit having a 20 MHz bandwidth, a bandwidth of up to 100 MHz may be supported.
  • One DL CC or a pair of UL CC and DL CC may correspond to one cell. Accordingly, it can be said that a terminal communicating with a base station through a plurality of DL CCs receives a service from a plurality of serving cells.
  • 9 is a comparative example of a single carrier system and a carrier aggregation system.
  • the carrier aggregation system (FIG. 9B) has three DL CCs and three UL CCs, but the number of DL CCs and UL CCs is not limited.
  • PDCCH and PDSCH may be independently transmitted in each DL CC, and PUCCH and PUSCH may be independently transmitted in each UL CC.
  • the PUCCH may be transmitted only through a specific UL CC.
  • the UE may be provided with services from three serving cells.
  • the UE may monitor the PDCCH in the plurality of DL CCs and receive DL transport blocks simultaneously through the plurality of DL CCs.
  • the terminal may transmit a plurality of UL transport blocks simultaneously through the plurality of UL CCs.
  • the pair of DL CC #A and UL CC #A becomes the first serving cell
  • the pair of DL CC #B and UL CC #B becomes the second serving cell
  • the DL CC #C and UL CC # C are the third serving cell.
  • Each serving cell may be identified through a cell index (CI).
  • the CI may be unique within the cell or may be terminal-specific.
  • the serving cell may be divided into a primary cell and a secondary cell.
  • the primary cell is a cell in which the UE performs an initial connection establishment process, initiates a connection reestablishment process, or is designated as a primary cell in a handover process.
  • Primary cells are also referred to as reference cells.
  • the secondary cell may be established after the RRC connection is established and may be used to provide additional radio resources. At least one primary cell is always configured, and the secondary cell may be added / modified / released by higher layer signaling (eg, RRC message).
  • the CI of the primary cell can be fixed. For example, the lowest CI can be designated as the CI of the primary cell.
  • a DL subframe and an UL subframe coexist in one radio frame.
  • the number of UL subframes is less than the number of DL subframes. Therefore, in case of lack of a UL subframe for transmitting the ACK / NACK signal, transmitting a plurality of ACK / NACK signal for the DL transport blocks received in a plurality of DL subframe in one UL subframe. Support.
  • ACK / NACK bundling transmits an ACK when all of the PDSCHs (ie, downlink transport blocks) received by the UE succeed, and in other cases, transmits an NACK.
  • ACK or NACKs for each PDSCH are compressed through a logical AND operation.
  • ACK / NACK multiplexing is also referred to as ACK / NACK channel selection (or simply channel selection).
  • ACK / NACK multiplexing the UE selects one PUCCH resource among a plurality of PUCCH resources and transmits ACK / NACK.
  • the following table shows DL subframe n-k associated with UL subframe n according to UL-DL configuration in 3GPP LTE, where k ⁇ K and M represent the number of elements of set K.
  • HARQ-ACK (i) indicates ACK / NACK for an i-th downlink subframe among M downlink subframes.
  • DTX Discontinuous Transmission
  • a DL transport block is not received on a PDSCH or a corresponding PDCCH is not detected in a corresponding DL subframe.
  • three PUCCH resources n (1 ) PUCCH, 0 , n (1) PUCCH, 1 , n (1) PUCCH, 2 ), and b (0) and b (1) are two bits transmitted using the selected PUCCH.
  • ACK / NACK channel selection if there is at least one ACK, the NACK and the DTX are coupled. This is because a combination of reserved PUCCH resources and QPSK symbols cannot indicate all ACK / NACK states. However, in the absence of an ACK, the DTX decouples from the NACK.
  • the above-described ACK / NACK bundling and ACK / NACK multiplexing may be applied when one serving cell is configured for the UE in TDD.
  • one serving cell is configured (ie, only a primary cell) is configured for the UE in TDD
  • ACK / NACK is transmitted in subframe n.
  • a base station may inform a user equipment through semi-persistent transmission / reception in subframes through a higher layer signal such as radio resource control (RRC).
  • RRC radio resource control
  • the parameter given as the higher layer signal may be, for example, a period and an offset value of the subframe.
  • the frequency resource (resource block) according to the resource block allocation specified in the PDCCH, MCS information SPS transmission / reception is performed in a subframe corresponding to a subframe period and an offset value allocated through RRC signaling by applying a modulation and a coding rate according to FIG.
  • the PDCCH for releasing the SPS is referred to as an SPS release PDCCH (also referred to as a downlink SPS release PDCCH).
  • ACK / NACK signal transmission is required for the SPS release PDCCH.
  • the UE transmits ACK / NACK using PUCCH format 1a / 1b by PUCCH resource n (1, p) PUCCH .
  • p in n (1, p) PUCCH indicates that it is for antenna port p.
  • K is defined by Table 5 above.
  • PUCCH resource n (1, p) PUCCH may be allocated as follows. p may be p0 or p1.
  • c is N among ⁇ 0,1,2,3 ⁇ c ⁇ n CCE ⁇ N c + 1 (Antenna port p0) , N c ⁇ (n CCE + 1) ⁇ N c + 1 (Antenna port p1) Is selected to satisfy.
  • N (One) PUCCH Is a value set by a higher layer signal.
  • N C max ⁇ 0, floor [N DL RB ⁇ (N RB sc C-4) / 36] ⁇ .
  • N DL RB Is the downlink bandwidth
  • N RB sc Is the size in the frequency domain of the resource block expressed by the number of subcarriers.
  • n-k m Is the first CCE number used for transmission of the corresponding PDCCH.
  • m is k m This value is the smallest value in the set K of Table 5 above.
  • ACK / NACK may be transmitted.
  • the UE transmits ACK / NACK through PUCCH formats 1a / 1b by n (1, p) PUCCH set by a higher layer signal.
  • a transmission power control (TPC) field of a PDCCH for reserving four resources (first PUCCH resource, second PUCCH resource, third PUCCH resource, fourth PUCCH resource) through an RRC signal and activating SPS scheduling It can indicate one resource through.
  • the following table is an example of indicating a resource for channel selection according to the TPC field value.
  • one serving cell is configured (ie, only a primary cell) is configured for the UE in TDD
  • ACK / NACK multiplexing is used, and M> 1. That is, suppose that a plurality of DL subframes are connected to one UL subframe.
  • PUCCH resource n (1) PUCCH, i for transmitting ACK / NACK when the UE receives the PDSCH in the subframe nk i (0 ⁇ i ⁇ M-1) or detects the DL SPS release PDCCH Can be assigned together.
  • k i ⁇ K and set K have been described with reference to Table 5 above.
  • PUCCH, i (M - i -1) ⁇ N c + i ⁇ N c + 1 + n CCE, i + N (1) PUCCH
  • N C max ⁇ 0, floor [N DL RB ⁇ (N RB sc ⁇ c-4) / 36] ⁇ .
  • N DL RB is a downlink bandwidth
  • N RB sc is a size in the frequency domain of a resource block expressed by the number of subcarriers.
  • n CCE, i is the first CCE number used for transmission of the corresponding PDCCH in subframe nk i .
  • PUCCH, i is determined according to a configuration given in a higher layer signal and Table 7.
  • the UE transmits ACK / NACK using channel selection or PUCCH format 3 using PUCCH format 1b.
  • the UE may perform spatial ACK / for multiple codewords in one downlink subframe.
  • NACK bundling is performed and the bundled ACK / NACK bits for each serving cell are transmitted through channel selection using PUCCH format 1b.
  • Spatial ACK / NACK bundling means compressing ACK / NACK for each codeword through a logical AND operation in the same downlink subframe.
  • ACK / NACK bit is 4 bits or less, spatial ACK / NACK bundling is not used and is transmitted through channel selection using PUCCH format 1b.
  • the ACK / NACK bit is greater than 20 bits, spatial ACK / NACK bundling is performed in each serving cell and spatial ACK / NACK bundled ACK / The NACK bit may be transmitted through PUCCH format 3. If the ACK / NACK bit is 20 bits or less, spatial ACK / NACK bundling is not used, and the ACK / NACK bit is transmitted through PUCCH format 3.
  • each serving cell may have a different UL-DL configuration.
  • some of the same subframes for the plurality of serving cells may be configured as a downlink subframe and the other may be configured as an uplink subframe.
  • FIG. 10 shows an example in which different UL-DL configurations are applied to a plurality of serving cells.
  • the subframe N of the first serving cell is an uplink subframe (denoted U) and the subframe N of the second serving cell is set a downlink subframe (denoted D).
  • the UE can operate in full duplex, uplink transmission and downlink reception may be simultaneously performed in subframe N 801.
  • the terminal is a terminal operating in a half duplex (half duplex), it is not possible to perform both uplink transmission and downlink reception in subframe N (801).
  • the terminal means a terminal operating in full duplex unless otherwise specified.
  • the corresponding subframe is called a valid UL subframe.
  • Subframes in which the same subframes of a plurality of serving cells are set differently from each other and a terminal operating in half duplex cannot perform uplink transmission are called an invalid UL subframe.
  • subframe N 801 is an invalid uplink subframe.
  • Table 8 below shows which subframes are transmitted ACK / NACK according to UL-DL configuration for one serving cell.
  • the UE When the UE receives a PDCCH (eg downlink SPS release PDCCH) that requires PDSCH or ACK / NACK response in subframe n, it transmits ACK / NACK in subframe n + k (n).
  • the k (n) value is shown.
  • the UE when the UL-DL configuration is 0, when the PDSCH is received in subframe 0, it indicates that ACK / NACK is transmitted in subframe 4 after 4 subframes.
  • the UE needs a specific time to transmit ACK / NACK after receiving the PDSCH or DL SPS release PDCCH.
  • the minimum value of this specific time is referred to as k min below, and the value may be 4 subframes.
  • the ACK / NACK is transmitted in the first uplink subframe after k min .
  • the underlined numbers in Table 8 do not indicate the first uplink subframe after k min has elapsed and indicate the uplink subframe located next. The reason for this is to prevent transmitting ACK / NACK for too many downlink subframes in one uplink subframe.
  • FIG. 11 shows a method of operating HARQ according to an embodiment of the present invention.
  • the base station transmits UL-DL configuration information of the primary cell (PCell) and the secondary cell (SCell) to the terminal (S110).
  • the base station transmits data in subframe n of the primary cell (S120).
  • the data collectively requires an ACK / NACK response and may include a PDSCH, a DL SPS release PDCCH, and the like.
  • the terminal decodes the data and generates ACK / NACK according to the result (S130).
  • the UE transmits ACK / NACK in subframe n + k PCC (n) of the primary cell (S140).
  • Subframe n + k PCC (n) may be determined by the following method.
  • Method 1 is a method of setting the fastest uplink subframe equal to or later than n + k min to subframe n + k PCC (n).
  • n When data is received in subframe n of the primary cell, when transmitting ACK / NACK for the data in subframe n + k PCC (n) of the primary cell, the k PCC (n) is shown in the following table. Can be given.
  • Underlined numbers in Table 9 indicate that the value is different compared to Table 8. For example, when the UL-DL configuration of the primary cell is 6, when the data is received in subframes 0, 1, 6, or 9, an uplink subframe that transmits ACK / NACK is different from Table 8.
  • Table 9 may be represented as Table 10 below.
  • Table 10 ACK / transmits a NACK, and the ACK / data corresponding to the NACK is received subframe to subframe n in subframe n - when said k i (n), shows the k i (n) .
  • Table 9 and Table 10 express the same contents in different ways.
  • the terminal is a terminal operating in half-duplex (half-duplex)
  • timing may be set without considering the validity of the uplink subframe.
  • the base station may not schedule the downlink subframe corresponding to the invalid uplink subframe.
  • Method 1 described above has the advantage that the ACK / NACK response to the data transmitted through the primary cell is the fastest. That is, the ACK / NACK response delay is minimized.
  • Method 2 is a method of configuring subframe n + k PCC (n) in the case where a conventional serving cell is allocated to a UE in a primary cell. That is, the primary cell is a method of transmitting ACK / NACK according to the HARQ timing according to Table 8 described above.
  • the ACK / NACK is transmitted only when the subframe determined as a subframe to transmit the ACK / NACK according to Table 8 is a valid uplink subframe. After the invalid subframe, ACK / NACK may be transmitted in the first valid uplink subframe.
  • the base station may limit the scheduling of the downlink subframe corresponding to the ACK / NACK transmission timing of the invalid uplink subframe.
  • Method 2 can take full advantage of the existing scheme and has the advantage that the amount of ACK / NACK information transmitted in each uplink subframe of the primary cell can be equalized.
  • FIG. 12 illustrates a method of operating HARQ according to another embodiment of the present invention.
  • the base station transmits UL-DL configuration information of the primary cell (PCell) and the secondary cell (SCell) to the terminal (S210).
  • the base station transmits data in subframe n of the secondary cell (S220).
  • the data collectively requires an ACK / NACK response and may include a PDSCH, a DL SPS release PDCCH, and the like.
  • the terminal decodes the data and generates ACK / NACK according to the result (S230).
  • the UE transmits ACK / NACK in subframe n + k SCC (n) of the primary cell (S240).
  • Subframe n + k SCC (n) may be determined by the following method.
  • Method 3 is a method of configuring an uplink subframe of the fastest primary cell equal to or later than n + k min as a subframe n + k SCC (n). That is, when data is received in subframe n of the secondary cell, when transmitting ACK / NACK for the data in subframe n + k SCC (n) of the primary cell, the k SCC (n) is shown in the following table. Can be given together. Table 11 shows k SCC (n) according to each UL-DL configuration of the secondary cell on the assumption that the UL-DL configuration of the primary cell is zero.
  • the UL-DL configuration of the secondary cell is 1, if data is received in subframe 0 of the secondary cell, the ACK / NACK for the data is transmitted in subframe 4 of the primary cell. Since the primary cell may need to transmit ACK / NACK for a plurality of secondary cells, it is preferable to use a UL-DL configuration (eg, UL-DL configuration 0) with many uplink subframes among UL-DL configurations. desirable.
  • a UL-DL configuration eg, UL-DL configuration 0
  • ACK / NACK may be limited not to be transmitted in some uplink subframes among the uplink subframes of the primary cell. That is, when the UL-DL configuration is 0 in the existing Table 9, the subframes 3 and 8 are not used for ACK / NACK transmission because there is no corresponding downlink subframe. In order to maintain such a conventional structure to the maximum, in Method 3, it may be determined that ACK / NACK is not transmitted in some uplink subframes of the primary cell.
  • the effective uplink subframe of the fastest primary cell equal to or later than n + k min may be set to subframe n + k SCC (n). have. That is, if the uplink subframe of the fastest primary cell equal to or later than n + k min is an invalid uplink subframe, the fastest valid uplink subframe after the invalid uplink subframe is subframe n +. k SCC (n).
  • timing may be set without considering the validity of the uplink subframe.
  • the base station may not schedule the downlink subframe of the secondary cell corresponding to the invalid uplink subframe of the primary cell.
  • Method 4 sets an uplink subframe of the fastest primary cell equal to or later than n + k min to subframe n + k SCC (n), but is connected to one uplink subframe of the primary cell
  • a method of limiting the number of downlink subframes of a cell That is, a method of transmitting ACK / NACK for downlink subframes of a predetermined number of secondary cells through an uplink subframe of the primary cell.
  • the k SCC (n) is given as in the following table. Can be.
  • Table 12 shows k SCC (n) according to each UL-DL configuration of the secondary cell on the assumption that the UL-DL configuration of the primary cell is 4.
  • ACK / NACK for data received in subframes 0, 1 and 5 of the secondary cell is transmitted in subframe 2 of the primary cell.
  • ACK / NACK for data received in subframes 6, 7, 8, and 9 of the secondary cell is transmitted in subframe 3 of the primary cell. In this way, a non-numeric amount of ACK / NACK information may be transmitted in two uplink subframes of the primary cell.
  • How many downlink subframes (hereinafter, referred to as downlink subframes) of the secondary cell are connected to an uplink subframe (hereinafter, referred to as an uplink subframe) of the primary cell may be determined by the following method.
  • the number of downlink subframes be N sf DL and the number of uplink subframes be N sf UL in one radio frame.
  • the number of downlink subframes connected to one uplink subframe is. For example, it can be obtained as (N sf DL / N sf UL ). If this value (ie, N sf DL / N sf UL ) is not an integer, the floor (N sf DL / N sf UL ) downlink subframes are concatenated in each uplink subframe, and then the rest (ie, N sf DL).
  • Floor (N sf DL / N sf UL ) x N sf UL ) downlink subframes are sequentially connected to uplink subframes.
  • the number of downlink subframes connected to each uplink subframe is ⁇ n DL 0 , n DL 1 , ..., n DL x , ..., n DL (N sf UL)-1 ⁇ .
  • N sf UL N sf UL
  • the downlink subframe having the largest k SCC (n) is the uplink subframe.
  • the (n DL x -1) downlink subframes after the connected downlink subframe are connected to the corresponding uplink subframe. Repeat this process.
  • the uplink subframe is replaced with a valid uplink subframe in Method 4.
  • Method 5 is an uplink subframe (of the primary cell) connected to the subframe n of the primary cell when both the subframe n of the secondary cell receiving the data and the subframe n of the primary cell are set to the downlink subframe. Transmits ACK / NACK. If the subframe n of the secondary cell receiving the data is configured as a downlink subframe, but the subframe n of the primary cell is configured as an uplink subframe, the fastest downlink after the subframe n in the primary cell.
  • the following table is an example of k SCC (n) according to the UL-DL configuration of the secondary cell, assuming that the UL-DL configuration of the primary cell is 0.
  • subframe 4 of the primary cell is an uplink subframe and subframe 4 of the secondary cell is a downlink subframe.
  • the UE transmits ACK / NACK in subframe 9 (of the primary cell) connected to subframe 5, which is the first downlink subframe after subframe 4 of the primary cell.
  • the uplink subframe is replaced with a valid uplink subframe in Method 4.
  • Method 6 determines a subframe of the primary cell to transmit the ACK / NACK according to the HARQ timing in the secondary cell receiving the data.
  • HARQ timing in the secondary cell is the same as the HARQ timing when only one serving cell is configured for the terminal. That is, it means the same HARQ timing as shown in Table 8.
  • the subframe of the primary cell determined according to the HARQ timing in the secondary cell is an uplink subframe
  • ACK / NACK is transmitted in the subframe. If the subframe of the primary cell is a downlink subframe, ACK / NACK is transmitted in the next first uplink subframe of the primary cell.
  • the following table is an example of k SCC (n) according to the UL-DL configuration of the secondary cell, assuming that the UL-DL configuration of the primary cell is 2.
  • the terminal receives data in subframe 4 of the secondary cell.
  • the subframe 8 is shown in Table 8 above.
  • ACK / NACK is transmitted in subframe 2, which is the first uplink subframe after subframe 8 of the primary cell. That is, ACK / NACK for data received in subframe 4 of the secondary cell is transmitted in subframe 2 (of the next radio frame) of the primary cell.
  • the uplink subframe is replaced with a valid uplink subframe in Method 4.
  • a terminal in which a plurality of serving cells is configured transmits an ACK / NACK for data received by the primary cell by method 2, and sends an ACK / NACK for data received by the secondary cell by method 3 or 4.
  • Can transmit It is obvious that various other combinations are possible.
  • the above-described methods 1 to 6 may be applied individually according to the DL / UL combination set in the same subframe period of different serving cells. For example, when the UL-DL combination of (subframe n of the primary cell, subframe n of the secondary cell) is (DL, DL), (DL, UL), (UL, UL) Different methods of 1 to 6 may be used in combination. Alternatively, the same method may be used for all the UL-DL combinations.
  • ACK / NACK channel selection may be prohibited and only PUCCH format 3 capable of transmitting 20 bits of ACK / NACK may be used.
  • each frequency band group may have an independent radio frequency transmission module and may use a separate power amplifier. Then, one PUCCH is transmitted for each frequency band group so that a problem of increasing PAPR does not occur even if a plurality of PUCCHs exist in the uplink.
  • the PUCCH may be transmitted in a specific serving cell belonging to a frequency band group other than the frequency band group to which the primary cell belongs. Then, the ACK / NACK timing (that is, HARQ timing) transmitted on the PUCCH is not a problem even according to the existing ACK / NACK timing.
  • FIG. 13 is a block diagram illustrating a wireless device in which an embodiment of the present invention is implemented.
  • the base station 100 includes a processor 110, a memory 120, and an RF unit 130.
  • the processor 110 implements the proposed functions, processes and / or methods. For example, the processor 110 transmits UL-DL configuration information for the primary cell and the secondary cell, and transmits data to the terminal through the primary cell or the secondary cell. In addition, an ACK / NACK for the data is received in a configured subframe of the primary cell. This method has been described in Methods 1 to 6.
  • the memory 120 is connected to the processor 110 and stores various information for driving the processor 110.
  • the RF unit 130 is connected to the processor 110 and transmits and / or receives a radio signal.
  • the terminal 200 includes a processor 210, a memory 220, and an RF unit 230.
  • the processor 210 implements the proposed functions, processes and / or methods. For example, the processor 210 receives UL-DL configuration information for the primary cell and the secondary cell from the base station, and receives data through the primary cell or the secondary cell. Thereafter, the primary cell transmits ACK / NACK for the data in the subframe set by the methods 1 to 6.
  • the memory 220 is connected to the processor 210 and stores various information for driving the processor 210.
  • the RF unit 230 is connected to the processor 210 to transmit and / or receive a radio signal.
  • Processors 110 and 210 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, data processing devices, and / or converters for interconverting baseband signals and wireless signals.
  • the memory 120, 220 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
  • the RF unit 130 and 230 may include one or more antennas for transmitting and / or receiving a radio signal.
  • the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
  • the module may be stored in the memories 120 and 220 and executed by the processors 110 and 210.
  • the memories 120 and 220 may be inside or outside the processors 110 and 210, and may be connected to the processors 110 and 210 by various well-known means.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention porte sur un procédé pour exécuter une demande automatique de répétition hybride (HARQ) pour un terminal configuré avec une pluralité de cellules de desserte, et sur un terminal utilisant le procédé. Le procédé comprend les étapes consistant à : recevoir des informations de réglage de liaison montante-liaison descendante (UL-DL) sur une trame sans fil de duplexage par répartition temporelle (TDD) utilisée dans une première cellule de desserte et une seconde cellule de desserte, par l'intermédiaire de la première cellule de desserte ; recevoir des données provenant d'une sous-trame n de la seconde cellule de desserte ; et transmettre un signal d'accusé de réception/accusé de réception négatif (ACK/NACK) pour les données provenant d'une sous-trame n + kSCC(n) de la première cellule de desserte liée à la sous-trame n de la seconde cellule de desserte.
PCT/KR2012/001788 2011-03-11 2012-03-12 Procédé et dispositif de transmission d'ack/nack dans un système de communication sans fil fondé sur tdd WO2012124959A2 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105122676A (zh) * 2013-04-05 2015-12-02 Lg电子株式会社 在无线接入系统中发送上行链路控制信息的方法及其设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090046649A1 (en) * 2007-08-13 2009-02-19 Nokia Corporation Mapping of uplink ACK in TDD with asymmetric frame structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090046649A1 (en) * 2007-08-13 2009-02-19 Nokia Corporation Mapping of uplink ACK in TDD with asymmetric frame structure

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CATT: 'TDD Un HARQ Timing and Subframe Allocation in Rel-10' 3GPP TSG RAN WG1 MEETING #62BIS, RL-105177 11 October 2010, *
FUJITSU: 'Un HARQ Timing for LTE-A TDD' 3GPP TSG-RAN #62, RL-104882 23 August 2010, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105122676A (zh) * 2013-04-05 2015-12-02 Lg电子株式会社 在无线接入系统中发送上行链路控制信息的方法及其设备
CN105122676B (zh) * 2013-04-05 2018-07-03 Lg电子株式会社 在无线接入系统中发送上行链路控制信息的方法及其设备

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