WO2012036473A2 - 제어 정보를 전송하는 방법 및 이를 위한 장치 - Google Patents
제어 정보를 전송하는 방법 및 이를 위한 장치 Download PDFInfo
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- WO2012036473A2 WO2012036473A2 PCT/KR2011/006794 KR2011006794W WO2012036473A2 WO 2012036473 A2 WO2012036473 A2 WO 2012036473A2 KR 2011006794 W KR2011006794 W KR 2011006794W WO 2012036473 A2 WO2012036473 A2 WO 2012036473A2
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- nack
- pucch
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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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
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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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
- 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
- H04L5/0058—Allocation criteria
- H04L5/0073—Allocation arrangements that take into account other cell interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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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
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method for transmitting control information and an apparatus therefor.
- Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
- a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, (orthogonal frequency division multiple access (DMA) systems, and single carrier frequency SC_FDMA (SC_FDMA) systems. division multiple access) ⁇ 1 system.
- An object of the present invention is to provide a method and an apparatus therefor for efficiently transmitting uplink control information in a wireless communication system.
- Another object of the present invention is to provide a method and apparatus for efficiently transmitting control information, preferably ACK / NACK information in a multicarrier situation.
- Technical problems to be achieved in the present invention are not limited to the above technical problems, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. [Measures of problem]
- a method for transmitting uplink control information in a situation in which a plurality of cells including a primary cell and a secondary cell in a wireless communication system is configured the plurality of PUCCH (Physical Uplink Control CHannel) format lb Selecting one PUCCH resource corresponding to a plurality of HARQ ACKs (Hybrid Automatic Repeat reQuest-Acknowledgement) from the PUCCH resources of the UE; And transmitting a complex value corresponding to the plurality of HARQ-ACKs by using the selected PUCCH resource, wherein the relationship between the plurality of HARQ-ACK, PUCCH resources, and bit values includes a relationship of the following table.
- HARQ-ACK (0) ⁇ (1) represents the ACK (A) / NACK (N) / DTX (D) response to the data block on the MIM0 (Mult iple Input Multiple Output) cell
- HARQ-ACK (2) Denotes an ACK / NACK / DTX answer for a data block on a non-MIM0 cell
- PUCCH resources # 1 to # 2 represent PUCCH resources for the PUCCH format lb linked to the MIM0 sal
- PUCCH Resource # 3 represents a PUCCH resource for the PUCCH format lb linked to the non-MIMO cell.
- a radio frequency (RF) unit in a communication device configured to transmit uplink control information in a situation where a plurality of cells including a primary cell and a secondary cell are configured in a wireless communication system, a radio frequency (RF) unit ; And a processor, wherein the processor selects one PUCCH resource from a plurality of PUCCH resources for Physical Upl Ink Control CHannel (PUCCH) format lb and a plurality of HARQ ACKs (Hybrid Automatic Repeat ReQuest-Acknowledgment).
- PUCCH Physical Upl Ink Control CHannel
- HARQ ACKs Hybrid Automatic Repeat ReQuest-Acknowledgment
- a communication device configured to transmit a complex value for the plurality of HARQ-ACKs using the selected PUCCH resource is provided, and a relationship between the plurality of HARQ-ACK, PUCCH resources, and bit values includes a relationship shown in the following table. :
- HARQ-ACK (0) ⁇ (1) represents the ACK (A) / NACK (N) / DTX (D) for the data block on MIM0 (Mult iple Input Mult iple Output) cell
- HARQ-ACK (2) represents an ACK / NACK / DTX answer for a data block on a non-MIM0 cell
- PUCCH resources # 1 to # 2 represent PUCCH resources for the PUCCH format lb linked to the MIM0 cell
- PUCCH resource # 3 Denotes a PUCCH resource for the PUCCH format lb linked to the non-MIM0 cell.
- the primary cell and the secondary cell are each MIM0 cell and When configured as a non-MIM0 cell, the HARQ-ACK (0) to (1) indicates an ACK / NACK / DTX response to the PDSCHCPhysical Downlink Control CHannel on the primary cell, the HARQ-ACK (2) is It shows ACK / NACK / DTX answer for the PDSCH on the secondary cell.
- the PUCCH resource # 1 represents a PUCCH resource linked with a first CCECControl Channel Element (PDCCH) constituting a Physical Downlink Control CHannel (PDCCH) for a PDSCH on the primary cell
- the PUCCH resource # 2 Denotes a PUCCH resource linked with a second CCE constituting a PDCCH for the PDSCH on the primary cell.
- the HARQ-ACK (0) to (1) receive an ACK / NACK / DTX response for the PDSCH on the secondary cell.
- HARQ-ACK 2 indicates an ACK / NACK / DTX response to the PDSCH on the primary cell.
- the PUCCH resource # 3 represents a PUCCH resource linked with the first CCE constituting the PDCCH corresponding to the PDSCH on the primary cell.
- the primary cell includes a Primary Component Carrier (PCC), and the secondary cell includes a Secondary Component Carrier (SCC).
- PCC Primary Component Carrier
- SCC Secondary Component Carrier
- uplink control information can be efficiently transmitted in a wireless communication system.
- control information preferably ACK / NACK information, can be efficiently transmitted in a multicarrier situation.
- 1 illustrates a structure of a radio frame.
- FIG. 2 illustrates a resource grid of a downlink slot.
- 3 shows a structure of a downlink subframe.
- 5 shows an example of physically mapping a PUCCH format to a PUCCH region.
- 6 shows a slot level structure of PUCCH format 2 / 2a / 2b.
- CA Carrier Aggregation
- 11 through 29 illustrate an ACK / NACK mapping scheme according to an embodiment of the present invention.
- FIG. 30 illustrates a base station and a terminal that can be applied to an embodiment of the present invention. [Specific contents to carry out invention]
- CDMA code division mult iple access
- FDMA frequency division mult iple access
- TDMA time division mult iple access
- OFDMA orthogonal frequency 0FDMA
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented in a wireless technology such as Global System for Mobile Communications (GSM) / Gener a 1 Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile Communications
- GPRS Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- 0FDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRAC Evolved UTRA.
- UTRA is part of the UMTSOJniversal Mobile Telecom TM unicat ions System.
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) employs 0FDMA in downlink and SC-FDMA in uplink as part of Evolved UMTS (E-UMTS) using E-UTRA.
- LTE-Advanced is an evolution of 3GPP LTE.
- 1 illustrates the structure of a radio frame.
- the wireless frame includes 10 subframes.
- the subframe includes two slots in the time domain.
- the time for transmitting a subframe is defined as a transmission time interval ( ⁇ ).
- ⁇ transmission time interval
- the subframe may have a length of lms, and one slot may have a length of 0.5 ms.
- One slot has a plurality of 0rthogonal frequency division multiplexing (0FDM) or single carrier frequency division multiple access (SC-FDMA) symbols in the time domain. Since LTE uses 0FDMA in downlink and SC-FDMA in uplink, an OFDM or SC-FDMA symbol represents one symbol period.
- a resource block (RB) is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.
- the structure of a radio frame is shown by way of example. The number of subframes included in the radio frame, the number of slots included in the subframe, and the number of symbols included in the slot may be modified in various ways.
- FIG. 2 illustrates a resource grid of a downlink slot.
- the downlink slot includes a plurality of OFDM symbols in the time domain.
- One downlink slot may include 7 (6) OFDM symbols, and the resource block may include 12 subcarriers in the frequency domain.
- Each element on the resource grid is referred to as a resource element (RE).
- One RB contains 12X7 (6) REs.
- the number N RBs of the RBs included in the downlink slot depends on the downlink transmission band.
- the structure of an uplink slot is the same as that of a downlink slot, but an OFDM symbol is replaced with an SC-FDMA symbol.
- 3 illustrates a structure of a downlink subframe.
- 0FDM symbols located in the first slot of a subframe correspond to a control region to which a control channel is allocated.
- the remaining 0FDM symbol is assigned to the data area to which the Physical Downlink Shared CHannel (PDSCH) is allocated.
- the PDSCH is used to carry a transport block (TB) or a codeword (Cwordword, CW) corresponding thereto.
- the transport block refers to a data block transferred from the MAC layer to the PHY layer through a transport channel.
- the codeword corresponds to the encoded version of the transport block. The relationship between the transport block and the codeword may vary according to swapping.
- PDSCH, transport block, and codeword are commonly used.
- Examples of a downlink control channel used in LTE include a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Hybrid ARQ Indicator Channel (PHICH), and the like.
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information on the number of OFDM symbols used for transmission of a control channel within the subframe.
- the PHICH carries HARQ ACK / NAC (hybrid automat ic repeat request acknowledgment / negat i ve acknowledgment) signals in response to uplink transmission.
- HARQ ACK / NAC hybrid automat ic repeat request acknowledgment / negat i ve acknowledgment
- Control information transmitted through the PDCCH is referred to as DCKDownlink Control Information.
- DCI includes resource allocation information and other control information for a terminal or a terminal group.
- DCi includes uplink / downlink scheduling information, uplink transmission (Tx) power control command, and the like.
- Information contents of a transmission mode and a DCI format for constructing a multi-antenna technology are as follows.
- ⁇ transmission mode 1 Transmission from a single base station antenna port
- Transmission mode 7 Transmission using UE-specif ic reference signals
- Po 1 Resource assignments for single codeword PDSCH transmissions (transmission modes 1, 2 and 7)
- Po 1A Compact signaling of resource assignments for single codeword PDSCH (all modes)
- the PDCCH includes a transmission format and resource allocation information of a downlink shared channel (DL-SCH), a transmission format and resource allocation information of an uplink shared channel (UL-SCH), paging.
- Px information on paging channel (PCH) system information on DL-SCH, resource allocation information of higher-layer control messages such as random access response transmitted on PDSCH, Tx power control command set for individual terminals in terminal group It carries the ⁇ power control command, activation instruction information of Voice over IP (VoIP).
- a plurality of PDCCHs may be transmitted in the control region. The terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on radio channel conditions.
- the CCE refers to a plurality of resource element groups (REGs).
- the format of the PDCCH and the number of PDCCH bits are determined according to the number of CCEs.
- the base station determines the PDCCH format according to the DCI to be transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
- the CRC is masked with an identifier (eg, RNTKradio network temporary identifier) depending on the owner or purpose of use of the PDCCH.
- an identifier eg, RNTKradio network temporary identifier
- an identifier eg, cell-RNTI (CR TI)
- CR TI cell-RNTI
- P-RNTI paging-RNTI
- SI-R TI system information RNTI
- the RA-RNTI random access—RNTI
- FIG. 4 illustrates a structure of an uplink subframe used in LTE.
- the uplink subframe includes a plurality of slots (eg, two).
- the slot may include different numbers of SC—FDMA symbols according to the CP length.
- the uplink subframe is divided into a data region and a control region in the frequency domain.
- the data area includes a PUSCH and is used to transmit a data signal such as voice.
- the control region includes a PUCCH and is used to transmit uplink control information (UCI).
- UCI uplink control information
- the PUCCH includes all RB pairs located at both ends of the data region on the frequency axis and hops to slot boundaries.
- PUCCH may be used to transmit the following control information.
- SR Scheduling Request
- UL UL Information used to request SCH resources. It is transmitted using 00K (0n-0ff Keying) method.
- HARQ ACK / NACK This is a response signal for a downlink data packet on a PDSCH. Indicates whether the downlink data packet was successfully received. One bit of ACK / NACK is transmitted in response to a single downlink codeword, and two bits of ACK / NACK are transmitted in response to two downlink codewords.
- CQI Channel Quality Indicator
- MIMOC Multiple Input Multiple Output MIMOC Multiple Input Multiple Output
- RKRank Indicator RKRank Indicator
- PMKPrecoding Matrix Indicator 20 bits are used per subframe.
- the amount of control information (UCI) that the UE can transmit in a subframe depends on the number of SC-FDMA available for control information transmission. SC-FDMA available for control information transmission Popo Popo Popo Popo Popo
- SC for the transmission of the reference signal in the subframe—Represents the remaining SC-FDMA symbol except for the FDMA symbol.
- SRS Sounding Reference Signal
- the reference signal is used for coherent detection of the PUCCH.
- PUCCH supports seven formats according to the transmitted information. Table 1 shows the mapping relationship between the PUCCH format and UCI in LTE.
- FIG. 5 illustrates an example of physically mapping a PUCCH format to a PUCCH region.
- the PUCCH format is a PUCCH format 2 / 2a / 2b (CQI) starting from a band-edge and inward.
- PUCCH region m 0, 1), PUCCH format 2 / 2a / 2b (CQI) or PUCCH format l / la / lb (SR / HARQ ACK / NACK) (e.g.
- the number of PUCCH RBs that can be used for the PUCCH format 2 / 2a / 2b (CQI) is transmitted to the UE through broadcast signaling in a cell. Period and frequency resolution at which the UE reports the CQI are controlled by the base station. Periodic CQI reporting and aperiodic CQI reporting are supported in the time domain.
- PUCCH format 2 is used for periodic CQI reporting.
- the base station instructs the user equipment to transmit the individual CQI report by embedding the individual CQI report in a resource (that is, PUSCH) scheduled for uplink data transmission.
- PUCCH format 2 / 2a / 2b shows a slot level structure of PUCCH format 2 / 2a / 2b.
- SC-FDMA # 1 and # 5 are used for DM Demodulation Reference Signal (RS) transmission within a slot.
- SC-FDMA # 3 is used for DM RS transmission in a slot.
- 10-bit CQI information is channel coded into 20 coded bits using a rate 1/2 leveled (20, k) Reed-Muller code (not shown).
- the coding bits are then scrambled (not shown) and mapped to QPSKC Quadrature Phase Shift Keying) constellation (QPSK modulation).
- Scramble may be performed using a length ⁇ 31 gold sequence similarly to the case of PUSCH data.
- Ten QPSK modulation symbols are generated and five QPSK modulation symbols (d 0 to d 4 ) are transmitted through corresponding SC-FDMA symbols in each slot.
- Each QPSK modulation symbol is used to modulate a base RS sequence (r u , 0 ) of length -12 before the IFFTUnverse Fast Fourier Transform.
- the DM RS sequence is similar to the CQI sequence in the frequency domain but is not modulated by the CQI modulation symbol.
- Parameters / resources for periodic reporting of CQI are configured semi-statically by higher layer (eg RRC) signaling. For example, if the PUCCH resource index "3 ⁇ 4 CCH is set for CQI transmission, the CQI is a CQI PUCCH linked with the PUCCH resource index" SCCH.
- PUCCH Resource Index indicates PUCCH RB and cyclic shift (a cs ).
- PUCCH format la / lb is used for ACK / NACK transmission.
- SC-FDMA # 2 / # 3 / # 4 is used for DM RS (Demodulation Reference Signal) transmission.
- SC—FDMA # 2 / # 3 is used for DM RS transmission, so four SC-FDMA symbols in the slot are used for ACK / NACK transmission.
- PUCCH format la / lb is used for PUCCH format 1 Collectively.
- ACK / NACK information is based on BPSKCBinary Phase Shift Keying (QPSK) and Quadrature Phase Shift Keying (QPSK) modulation schemes, respectively. It is modulated, and one ACK / NACK modulation symbol is generated (do).
- QPSK BPSKCBinary Phase Shift Keying
- QPSK Quadrature Phase Shift Keying
- each bit (1) ⁇ ), 0,1] represents a HARQ response for the corresponding DL transport block.
- the corresponding bit is given as 1 and the corresponding bit in the case of negative ACK (NACK). Is given by zero.
- Table 2 shows the modulation table defined for PUCCH formats la and lb in existing LTE.
- the PUCCH format la / lb performs an orthogonal spreading code (e.g., Walsh-Hadamard or DFT code) ⁇ 0 , 2 ,, in addition to performing a cyclic shift (a cs, x ) in the frequency domain like the above-described CQI.
- Orthogonal spreading code e.g., Walsh-Hadamard or DFT code
- a cs, x cyclic shift
- Time domain spreading Time domain spreading.
- more terminals can be multiplexed on the same PUCCH RB.
- RS transmitted from different terminals is multiplexed using the same method as UCI. Cyclic Supported in SC-FDMA Symbols for PUCCH ACK / NACK RB
- the number of A PUCCH shifts is in the cell-specific higher layer signaling parameter Ash ' ft .
- Ashift e U, 2, 3 ⁇ indicates that the shift values are 12, 6, and 4, respectively.
- the number of spreading codes that can actually be used for ACK / NACK in time-domain CDM may be limited by the number of RS symbols. This is because the multiplexing capacity of the RS symbol is smaller than the multiplexing capacity of the UCI symbol due to the small number of RS symbols.
- 8 shows an example of determining a PUCCH resource for ACK / NACK. In the LTE system, PUCCH resources for ACK / NACK are not allocated to each UE in advance, and a plurality of PUCCH resources are divided and used at every time point by a plurality of UEs in a cell.
- the PUCCH resource used by the UE to transmit ACK / NACK corresponds to a PDCCH carrying scheduling information about corresponding downlink data.
- the entire region in which the PDCCH is transmitted in each downlink subframe consists of a plurality of control channel elements (CCEs), and the PDCCH transmitted to the UE consists of one or more CCEs.
- the UE transmits ACK / NACK through a PUCCH resource that is treated for a specific CCE (eg, the first CCE) among the CCEs configuring the PDCCH received by the UE.
- a specific CCE eg, the first CCE
- each rectangle represents a CCE in a downlink component carrier (DL CC), and each rectangle represents a PUCCH resource in an uplink component carrier (UL CC).
- Each PUCCH index is assigned to a PUCCH resource for ACK / NACK. If it is assumed that the information on the PDSCH is transmitted through the PDCCH configured 4 to 6 CCE as shown in Figure 8, the UE ACK / NACK through the 4 PUCCH corresponding to the 4 CCE, the first CCE constituting the PDCCH Send it.
- FIG. 8 illustrates a case in which up to M PUCCHs exist in a UL CC when there are DL COIl up to N CCEs. N may be M, but it is also possible to design M and N values differently and to overlap the mapping of CCE and PUCCH.
- the PUCCH resource index in the LTE system is determined as follows.
- n (1) PUCCH represents a resource index of PUCCH format 1 for transmitting ACK / NACK / DTX
- N (1) PUCCH represents a signaling value received from the upper layer
- n CCE is used for PDCCH transmission Represents the smallest value among the CCE indexes.
- PRB Physical Resource Block
- the UE transmits one multiplexed ACK / NACK signal for a plurality of PDSCHs received through subframes at different time points. send .
- the UE transmits one multiplexed ACK / NACK signal for a plurality of PDSCHs by using a PUCCH select transmission scheme.
- PUCCH selection transmission is also referred to as ACK / NACK selection scheme.
- the terminal occupies a plurality of uplink physical channels to transmit the multiplexed ACK / NACK signal when a plurality of downlink data is received.
- the UE may occupy the same number of PUCCHs using a specific CCE of a PDCCH indicating each PDSCH.
- the multiplexed ACK / NACK signal may be transmitted using a combination of a PUCCH selected from among a plurality of occupied PUCCHs and a modulation / coded content applied to the selected PUCCH.
- Table 3 shows the PUCCH selective transmission scheme defined in the LTE system.
- NACK / DTX, NACK / DTX, ACK, NACK / DTX n (1) piK H, 2 0,0
- HARQ-ACK (i) represents the HARQ ACK / NACK / DTX result of the i-th data unit (0 ⁇ i ⁇ 3).
- DX Continuous Transmission
- HARQ-ACK is commonly used herein with ACK / NACK.
- Up to four PUCCH resources ie, n (1) PUCCH , 0 -n (1) PUCCH , 3 ) may be occupied with each data unit.
- the multiplexed ACK / NACK is transmitted on one PUCCH resource selected from occupied PUCCH resources.
- N (1) PUCCH , x described in Table 3 actually represents the PUCCH resources used to transmit ACK / NACK.
- b (0) b (l) represents two bits transmitted through the selected PUCCH resource and is modulated by the QPSK scheme. For example, when the terminal successfully decodes four data units, the terminal transmits (1,1) to the base station through the PUCCH resource associated with! ⁇ .
- NACK and DTX are coupled (NACK / DTX, N / D) except in some cases because the combination of PUCCH resources and QPSK symbols is insufficient to represent all possible ACK / NACK assumptions.
- 9 illustrates a Carrier Aggregation (CA) communication system.
- the LTE-A system aggregates multiple uplink / downlink frequency blocks for a wider frequency band.
- Carrier aggregation or bandwidth aggregation technology using larger uplink / downlink bandwidth is used.
- Each frequency block is transmitted using a component carrier (CC).
- the component carrier may be understood as the carrier frequency (or center carrier, center frequency) for the corresponding frequency block.
- a plurality of uplink / downlink component carriers Component Carrier,
- CC can be collected to support wider uplink / downlink bandwidth.
- Each of the CCs may be adjacent or non-adjacent to each other in the frequency domain.
- the bandwidth of each component carrier can be determined independently. It is also possible to merge asymmetric carriers in which the number of UL CCs and the number of DL CCs differ. For example, in case of two UL CCs and one UL CC, the configuration may be configured to be 2: 1.
- the DL CC / UL CC link may be fixed in the system or configured semi-statically.
- the frequency band that can be monitored / received by a specific terminal may be limited to M ( ⁇ N) CCs.
- Various parameters for carrier aggregation may be set in a cell specific (ceU-specific), UE group-specific or UE-specific manner. Meanwhile, the control information may be set to be transmitted and received only through a specific CC.
- This particular CC may be referred to as a primary CCXPrimary CC, PCC (or anchor CC), and the remaining CC may be referred to as a secondary CCX Secondary CC (SCC).
- LTE-A uses the concept of a cell to manage radio resources.
- SAL is defined as a combination of downlink resources and uplink resources, and uplink resources are not required. Therefore, the sal may be configured with only downlink resources or with downlink resources and uplink resources.
- Carrier of downlink resources if carrier aggregation is supported
- the linkage between the frequency (or DL CC) and the carrier frequency (or UL CC) of the uplink resource may be indicated by system information.
- a cell operating on the primary frequency (or PCC) may be referred to as a primary cell (Primary Cell, PCell), and a cell operating on the secondary frequency (or SCC) may be referred to as a secondary cell (Secondary Cell, SCell).
- the PCell is used by the terminal to perform an initial connection establishment process or to perform a connection re-establishment process.
- PCell may refer to a cell indicated in the handover process.
- the SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.
- PCell and SCell may be collectively referred to as serving cells. Therefore, in the UE that is in the RRCLCONNECTED state, but carrier aggregation is not set or does not support carrier aggregation, there is only one serving cell configured only with the PCell.
- the network may configure one or more SCells for terminals supporting carrier aggregation in addition to the PCell initially configured in the connection establishment process.
- each DL CC has its own Carrier Indication Field (CIF) according to LTE PDCCH rules.
- CIF Carrier Indication Field
- PDCCH scheduling PDSCH can be transmitted. Terminal-specific (or UE-Group-Specific or Cell-Specific) When CIF is Enabled by Higher Layer Signaling, DL CC A (PDCCH CC) Not Only PDCCH Scheduling PDSCH of DL CC A Using CIF PDCCH scheduling may also be transmitted. In this case, PDCCH is not transmitted in DL CC B / C that is not configured as PDCCH CC. Accordingly, DL CC ACPDCCH CC) must include both the PDCCH search space associated with DL CC A, the PDCCH search space associated with DL CC B, and the PDCCH search space associated with DL CC C.
- LTE-A considers to feed back a plurality of ACK / NACK information / signals for a plurality of PDSCHs transmitted through a plurality of DL CCs through a specific ULCC (eg, ULPCC or ULPCell).
- a specific ULCC eg, ULPCC or ULPCell.
- the terminal receives two codewords (or transport blocks) by operating in a single user multiple input multiple output (SU-MIMO) mode in a certain DL CC.
- the UE should be able to transmit a maximum of five feedback states, including up to four feedback states of ACK / ACK, ACK / NACK, NACK / ACK, NACK / NACK, or DTX for the corresponding DL CC.
- the DL CC is set to support a single codeword (or transport block), there are up to three states of ACK, NACK, and DTX for the DL CC. If the NACK is processed in the same way as the DTX, there are two feedback states, ACK and NACK / DTX, for the corresponding DL CC. Therefore, if the terminal merges up to five DL CCs and operates in the SU-MIM0 mode in all CCs, the terminal may have a maximum of 55 transmittable feedback states, and the total ACK / NACK payload size for expressing this is 12 bits. If the DTX is processed in the same way as the NACK, the number of feedback states is 45, and the ACK / NACK payload size for expressing the total is 10 bits.
- LTE-A channel coding a plurality of ACK / NACK information for example, Reed-Muller Code, Tail-biting Convolutional Code, etc.
- PUCCH format 2 or a new PUCCH format eg, block-spreading based PUCCH format
- transmitting a plurality of ACK / NACK information / signals using a conventional PUCCH format la lb and ACK / NACK multiplexing (ie, ACK / NACK selection) in a multicarrier situation is discussed.
- the UE may receive data (PDSCH) in a plurality of DL CCs, and thus, a new scheme for the UE to transmit a plurality of bits of HARQ-ACK information regarding a plurality of data is needed.
- PDSCH data
- an ACK / NACK multiplexing method similar to the channel selection method of the LTE TDD system may be considered.
- the present invention proposes a specific ACK / NACK multiplexing (channel selection) scheme applicable to a carrier aggregation system.
- the following description describes an ACK / NACK multiplexing scheme that can be used when two DL CCs are merged.
- the present invention can be extended even when three or more DL CCs are used as an example.
- the present invention assumes that a plurality of ACK / NACK information / signals for a plurality of PDSCHs transmitted through a plurality of DL CCs are transmitted through a specific UL CC (eg, UL PCC).
- a specific UL CC eg, UL PCC
- HARQ-ACK This indicates a reception response result for the data block, that is, an ACK / NACK / DTX response (simply, an ACK / NACK answer).
- An ACK / NACK / DTX response means ACK, NACK, DTX, or NACK / DTX.
- “HARQ-ACK for a specific CC” or “HARQ-ACK for a specific CC” means that the associated (eg, Represents an ACK / NACK answer for a data block (eg, PDSCH) scheduled for a corresponding CC.
- the ACK / NACK state means a combination corresponding to a plurality of HARQ-ACK.
- PDSCH is a transport block Or may be replaced by a codeword.
- PUCCH resource applies to PUCCH index or PUCCH resource index.
- the PUCCH resource index is mapped to at least one of an orthogonal cover (0C), a cyclic shift (CS), and a PRB.
- the PUCCH index includes a PUCCH index for PUCCH format la or PUCCH format lb.
- PUCCH resource linked to CC PUCCH resource linked to PDCCH that is referred to as PDSCH on the CC (see Equation 1, implicit PUCCH resource), or PUCCH resource indicated / assigned by PDCCH to be referred to PDSCH on the CC.
- Explicit PUCCH resource In the explicit PUCCH resource method, the PUCCH resource may be indicated / allocated using ARKACK / NACK Resource Indicator (PDCCH).
- ARKACK / NACK Resource Indicator Used to indicate PUCCH resources.
- the ARI may be used for indicating a resource transformation value (eg, offset) for a specific PUCCH resource (group) (configured by a higher layer).
- an ARI may be used to indicate a specific PUCCH resource (group) index within a set of PUCCH resource (group) (configured by a higher layer).
- the ARI may be included in a TPC (Transmit Power Control) field of the PDCCH for the PDSCH on the SCC. PUCCH power control is performed through the TPC field in the PDCCH scheduling the PCC (ie, the PDCCH corresponding to the PDSCH on the PCC). ARI is commonly used with HARQ-AC resource indication values.
- PCCPDCCH Represents a PDCCH that schedules a PCC, that is, a PCC PDCCH on a PCC.
- PCC PDCCH that represents the PDSCH is shown.
- Cross-Carrier for PCC Assuming scheduling is not allowed, the PCC PDCCH is sent only on the PCC.
- PCC PDCCH represents PDCCH on PCC. The meaning of the PCC PDCCH can be interpreted according to the context.
- SCCPDCCH Represents a PDCCH that schedules an SCC. That is, SCCPDCCH represents a PDCCH that corresponds to a PDSCH on an SCC. If cross-carrier scheduling is allowed for the SCC, the SCC PDCCH may be sent on the PCC. On the other hand, when cross-carrier scheduling is not allowed for the SCC, the SCC PDCCH is transmitted only on the SCC. Also, the SCCPDCCH indicates a PDCCH on the SCC. The meaning of the SCC PDCCH can be interpreted according to the context.
- PDCCH scheduling a CC Represents a PDCCH scheduling a PDSCH on the CC. That is, the PDCCH which represents the PDCCH on this CC is shown.
- Cross CC Scheduling This refers to an operation in which all PDCCHs are scheduled / transmitted only through one PCC.
- Non-Cross-CC Scheduling PDCCH scheduling each CC is scheduled / transmitted through the CC.
- LTE-A allows cross-carrier scheduling for DL PCC but only self-carrier scheduling for DL SCC.
- the PDCCH scheduling the PDSCH on the DL PCC may be transmitted only on the DL PCC.
- the PDCCH scheduling the PDSCH on the DL SCC may be transmitted on the DL PCC (cross-carrier scheduling) or on the corresponding DL SCC (sulf-carrier scheduling).
- Table 4 illustrates the number of ACK / NACK and PUCCH resources according to CC configuration. 2 When CCs are merged, the number of ACK / NACK bits to be fed back according to whether each DL CC is in MIM0 mode (2 CW) or Non-MIMO mode (1 CW) may be 2 to 4 bits. The number of PUCCH resources used for channel selection according to the number of ACK / NACK bits may also be 2 ⁇ 4.
- mapping scheme for selecting an ACK / NACK channel when the number of ACK / NACK bits is 2 to 4 bits will be specifically described.
- the following design criteria may be considered.
- Design Criterion 1 Full Implicit Resource Utilization UE receives PDCCH on DL Primary CC (Cross Carrier scheduling), and receives PDSCH indicated by CIF (Carrier Indication Field) after PDCCH decoding
- CIF Carrier Indication Field
- channel selection should be possible using only implicit resources (eg, Equation 1) linked to the CCE constituting the PDCCH.
- implicit resources eg, Equation 1
- MIM0 transmission mode CC simpleistically, MIMO CC
- each of the minimum CCE index n CCE and the next index (n CCE + l) of the PDCCH scheduling the CC respectively.
- the use of one linked implicit PUCCH # 1 and # 2 black implicit PUCCH # 1 and higher layer (e.g.
- Design Criterion 2 Reconfiguration error handling When the base station changes the DL CC configuration of the terminal (number of DL CCs or DL CC modes (eg, MIM0, non-MIMO)), a reset interval (terminal and base station) During unstable time intervals for transmitting and receiving the configuration information, the configuration information may be transmitted only through the DL PCC. In this case, a serious error may occur when there is a difference between the mapping on the ACK / NACK information of the DLPCC used by the terminal and the mapping on the DL PCC expected by the base station. Therefore, a function for preventing misalignment of ACK / NACK mapping between a terminal and a base station is required.
- the ACK / NACK mapping has the same form as the PUCCH format la or lb, and is transmitted using an implicit PUCCH resource linked to the DL PCC PDCCH.
- the ACK / NACK mapping is PUCCH format la or lb It has the same form as and is transmitted using an implicit PUCCH resource linked to the DL PCC PDCCH.
- the method illustrated above is referred to as a PCC fallback.
- Design Criterion 3 always reserve secondary resource of MIMO DL CC
- the PDCCH format is dynamically
- a single codeword can be received using 1A.
- MIM0 mode It is assumed that two dynamic (implicit) resources are always available in a MIMO CC regardless of the number of codewords actually received in the configured DL CC. For example, it may be considered to always use a resource linked to the first CCE (index nc CE ) of the PDCCH scheduling the MIMO CC and a resource linked to the second CCE (nc CE + l) at the same time.
- NACK NACK
- an ACK / NACK mapping scheme according to design criteria 1 to 4 when the number of ACK / NACK bits is 2, 3, or 4 bits will be described in detail.
- design criterion 2 detailed schemes may be divided into Embodiments 1 and 2 with respect to the number of codewords that a UE is allowed to receive on a DL PCC during a resetting period.
- Example 1 Falling back a single codeword (or transport block)
- ACK / NACK of DL PCC may be allocated to Most Significant Bit (MSB) and ACK / NACK of DL SCC to Least Significant Bit (LSB).
- MSB Most Significant Bit
- LSB Least Significant Bit
- NN state # 0
- AN state # 2
- BPSK constellation points corresponding to QPSK constellations (00) and (11)
- PCC PUCCH # 1 resources linked to the PCC PDCCH.
- NA (state # 1) and AA (state # 3) to the BPSK constellation points (corresponding to QPSK constellations (00) and (11)) of SCC PUCCH # 1. Can be.
- NA (state # 1) and AA (state # 3) it is also possible to consider assigning NA (state # 1) and AA (state # 3) to (01) and (10), another constellation point that maximizes the Euclidean distance between ACK / NACK states. .
- Table 5 shows a 2-bit ACK / NACK mapping table according to the present example.
- Table 5 shows ACK / NACK states and complex modulation values. See Table 2 for the modulation method. If the PCC fallback is not applied, the contents of the Chi column and the Ch2 column in the table below are also included in the present invention.
- HARQ-ACK represents the HARQ ACK (A) / NACK (N) / DTX (D) result for the PDSCH (or SPS release PDCCH on the PCC) on the PCC.
- N represents NACK or DTX.
- PCCPUCC 1 represents a PUCCH resource (index) linked with a CCE constituting the PCCPDCCH.
- SCC PUCCH # 1 is a PUCCH resource linked with the CCE constituting the SCC PDCCH It may be (index) or (cross-carrier scheduling case) or PUCCH resource (index) indicated / assigned using ARI (non-cross-carrier scheduling case).
- FIG. 12 to 14 illustrate a 3 bit ACK / NACK mapping method according to an embodiment of the present invention. This example assumes that a MIMO CC and a non-MIMO CC are merged.
- resources linked with PCC PDCCH are PUCCH # 1 and # 2
- resources linked with SCC PDCCH are PUCCH # 3.
- the 2-bit ACK / NACK information for the transport block of the MIMO PCC is allocated to the MSB 2-bit of the overall ACK / NACK information
- the 1-bit ACK / NACK information for the transport block of the non-MIMO SCC is LSB 1 of the overall ACK / NACK information. Can be assigned to a bit.
- the entire ACK / NACK information is based on the ACK / NACK state (ie, plural ACK / NACK).
- the resource linked with the PCC PDCCH is PUCCH # 1
- the resource linked with the SCC PDCCH is PUCCH # 2, # 3.
- the 1-bit ACK / NACK information for the transport block of the non-MIMO PCC is allocated to the MSB 1-bit of the full ACK / NACK information
- the 2-bit ACK / NACK information for the transport block of the MIMO SCC is all ACK / NACK information It can be allocated to the LSB 2 bits of.
- resources linked with MIMO CC PDCCH may be PUCCH # 1, # 2, and resources linked with non-MIMO CC PDCCH may be PUCCH # 3.
- 2-bit ACK / NACK information for the transport block of the MIMO CC is allocated to the MSB 2-bit of the entire ACK / NACK information 1 bit ACK / NACK information for a transport block of a non-MIMO CC is allocated to LSB 1 bit of the entire ACK / NACK information.
- the order of the PUCCH resources used may also be changed.
- the columns may be changed in the ACK / NACK mapping table of Table 6 below.
- the order of the columns PUCCH # 1, PUCCH # 2, and PUCCH # 3 may be changed in the order of PUCCH # 3, PUCCH # 2, PUCCH # 1.
- the options 1 to 4 of FIG. 12 may be considered.
- PUCCH # 1 is mapped to ⁇ (state # 0) and ANN (state # 4).
- NAN state # 2
- MA state # 7
- MN state # 6
- PUCCH # 3 NAA (state # 3)
- NA state # 5
- NNA state # 1
- mapping the ACK / NACK state to PUCCH resources minimizes the Hamming distance between adjacent states in the QPSK constellation (e.g. using gray coding), and ACKs on constellations. It may be configured to maximize the Euclidean distance of the / NACK state. 13 shows an example of mapping option 1 to PUCCH resources.
- FIG. 14 shows an example in which the ACK / NACK mapping of FIG. 13 is modified.
- gray coding is maintained in PUCCH # 2 and # 3, and an ACK / NACK state is mapped to a QPSK constellation point different from the example of FIG. 13.
- Tables 6 and 7 show ACK / NACK mapping tables according to FIGS. 13 and 14, respectively. Table 6
- HARQ-ACK (2) shows HARQ ACK (A) / for PDSCH on SCC NACK (N) / DTX (D) result may be indicated.
- N represents NACK or DTX.
- PUCCH # 1 ⁇ # 2 are each PCC
- PUCCH resource (index) linked with the minimum CCE index n CCE and the next CCE index n CCE + l constituting the PDCCH may be indicated.
- PUCCH # 3 is linked with the CCE constituting the SCC PDCCH
- HARQ-ACK is configured on PCC when non-MIMO PCC + MIMO SCC is configured.
- HARQ-ACK (1) to (2) may indicate a HARQ ACK (A) / NACK (N) / DTX (D) results for the PDSCH on the SCC.
- N represents NACK or DTX.
- PUCCH # 1 may indicate a PUCCH resource (index) linked with the minimum CCE nc CE constituting the PCC PDCCH.
- PUCCH # 2 ⁇ # 3 are the minimum CCE index ⁇ ( ⁇ ) constituting the SCC PDCCH ( ⁇ ) and the PUCCH resource (index) linked with the next CCE index nccE + ⁇ (in case of cross-carrier scheduling), or indicated / assigned using ARI.
- PUCCH resource (index) may be used (non-cross-carrier scheduling case).
- each of the ACK / NACK states in options 2 to 4 may be mapped to a QPSK symbol on a corresponding PUCCH resource in consideration of various methods of maximizing gray coding and Euclidean distance.
- bit-by-bit ACK / NACK performance may vary. This is because the number (type) of resources used when selecting the ACK / NACK is different for each ACK / NACK bit, and the usage form of the QPSK property may be different.
- a method of changing the position of each ACK / NACK in the ACK / NACK state according to a predetermined rule may be considered. By mixing the positions of individual ACK / NACKs in the ACK / NACK state, an effect of equalizing the performance of each ACK / NACK bit can be obtained.
- the position of each ACK / NACK in the ACK / NACK state can be changed over time. For example, when the SCC is set to MIM0, at one point, the ACK / NACK for the first transport block of the SCC is placed in the second ACK / NACK position, and the ACK / NACK for the second transport block is the third ACK. Can be assigned to the / NACK position (ie have. On the other hand, at other times, the ACK / NACK for the first transport block of the SCC can be allocated to the third ACK / NACK position and the ACK / NACK for the second transport block to the second ACK / NACK position. By mixing the positions of the individual ACK / NACK in the ACK / NACK state, the effect of equalizing the ACK / NACK performance on the two transport blocks of the SCC on the time axis can be obtained.
- the time point for changing the position of the individual ACK / NACK in the ACK / NACK state may be in a subframe unit. For example, in an even-numbered subframe, ACK / NACK for the first transport block of the SCC may be allocated to the second ACK / NACK position, and ACK / NACK for the second transport block may be allocated to the third ACK / NACK position. . On the other hand, in an odd numbered subframe, the ACK / NACK for the first transport block of the SCC can be allocated to the third ACK / NACK position and the ACK / NACK for the second transport block to the second ACK / NACK position. The reverse is also possible.
- each ACK / NACK may be maintained in the same form for each subframe, and the position of each ACK / NAKC may be changed in units of slots.
- the ACK / NACK for the first transport block of the SCC is in the second ACK / NACK position, the ACK / NACK for the second transport block in the ACK / NACK in the third ACK / NACK position.
- the ACK / NACK for the first transport block of the SCC can be allocated to the third ACK / NACK position and the ACK / NACK for the second transport block to the second ACK / NACK position.
- the reverse is also possible.
- the ACK / NACK performance equalization scheme described above illustrates a case in which only the order of ACK / NACK is changed in the transport block of the SCC in consideration of PCC fallback. However, PCC fallback is not considered If not, it is possible to equalize the ACK / NACK performance in more various ways. For example, the ACK / NACK performance equalization scheme described above may be equally applied even when the PCC is set to the MIM0 mode. In addition, in the ACK / NACK state, it is possible to mix ACK / NACK for the transport block of the PCC and SCC without distinguishing the CC.
- 15-16 illustrate a 4-bit ACK / NACK mapping method according to one embodiment of the present invention.
- both DL PCC and DL SCC operate in MIM0 mode.
- the 2-bit ACK / NACK information for the transport block of the MIMO DL PCC is allocated to the MSB 2-bit of the overall ACK / NACK information
- the 2-bit ACK / NACK information for the transport block of the MIMO DL SCC is the total ACK / NACK information. It can be allocated to the LSB 2 bits of.
- the entire ACK / NACK information corresponds to the ACK / NACK state (ie, a plurality of ACK / NACK). Considering the mapping that satisfies the design criteria 1 to 4, the options 1 to 4 of FIG. 15 may be considered.
- mapping the ACK / NACK state to the PUCCH resource minimizes the Hamming distance between adjacent states in the QPSK constellation (e.g. using gray coding) and ACK on constellations. It may be configured to maximize the Euclidean distance of the / NACK state. 16 shows an example of mapping option 1 to PUCCH resources.
- NNNN state # 0
- ANNN (state # 8) is the QPSK feature on the first resource (PCC PUCCH # 1) linked with PCCPDCCH, respectively. Mapped to (00) and (11). QPSK constellations (00) and (11) are identical to constellations for PUCCH format la (BPSK). The two states in PCC PUCCH # 1 are mapped to QPSK constellations (01) and (10). Gray coding is not satisfied due to the limitation of single codeword fallback function in PCC PUCCH # 1 resource. However, in PCC PUCCH # 2 and SCC PUCCH # 1 and # 2, ACK / NACK mapping may be configured as shown in consideration of maximizing gray coding and Euclidean distance for ACK / NACK voice response optimization.
- Table 8 shows ACK / NACK mapping table according to FIG. 16, respectively.
- HARQ-ACK (0) ⁇ (1) shows the HARQ ACK (A) / NACK (N) / DTX (D) results for the PDSCH (or SPS release PDCCH on the PCC) on the PCC.
- HARQ-ACK (2) to (3) shows the HARQ ACK (A) / NACK (N) / DTX (D) results for the PDSCH on the SCC.
- N represents NACK or DTX.
- PCC PUCCH # 1 ⁇ # 2 are the minimum CCE indexes that make up the PCC PDCCH. It may indicate a PUCCH resource (index) linked with n CCE and the next CCE index n CCE + l.
- SCC PUCCH # 1 ⁇ # 2 is the minimum CCE index ⁇ ( ⁇ ⁇ ) and then the PUCCH resource (index) linked with the next CCE index nccE + 1 constituting the SCC PDCCH (in case of cross-carrier scheduling) or indicated using ARI. It may be allocated PUCCH resource (index) (non-cross-carrier scheduling case).
- Option 1 several options are available to maximize the Euclidean distance between gray coding and each state (eg constellation rotation).
- options 2 to 4 may consider various methods for maximizing the gray coding scheme and the Euclidean distance.
- mappings in which four state bundles mapped to each of SCC PUCCH # 1 and SCC PUCCH # 2 are interchanged may be considered.
- the ACK / NACK state is allocated to PCC PUCCH # 1 / # 2 as shown in FIG. 16, but the 2, 6, 14, and 10 states are assigned to SCC PUCCH # 1, and the SCC PUCCH # is assigned. 2 can be assigned to states 1, 2, 11, and 9.
- bit-by-bit ACK / NACK performance may vary. This is because the number (type) of resources used when selecting the ACK / NACK is different for each ACK / NACK bit, and the usage form of the QPSK property may be different.
- a method of changing the position of each ACK / NACK in the ACK / NACK state according to a predetermined rule can be considered. By mixing the positions of individual ACK / NACK in the ACK / NACK state, the effect of equalizing the performance of each ACK / NACK bit can be obtained.
- the position of each ACK / NACK in the ACK / NACK state can be changed over time. For example, at one time, ACK / NACK for the first transport block of the SCC In the ACK / NACK position, the ACK / NACK for the second transport block can be assigned to the fourth ACK / NACK position (ie, LSB). On the other hand, at other times, the ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position and the ACK / NACK for the second transport block to the third ACK / NACK position.
- the positions of the individual ACK / NACKs within the ACK / NACK state it is possible to equalize the ACK / NACK performance on two transport blocks of the SCC on the time axis.
- the time point for changing the position of the individual ACK / NACK in the ACK / NACK state may be in a subframe unit. For example, in an even-numbered subframe, ACK / NACK for the first transport block of the SCC may be allocated to the third ACK / NACK position, and ACK / NACK for the second transport block may be allocated to the fourth ACK / NACK position. . On the other hand, in an odd-numbered subframe, ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position, and ACK / NACK for the second transport block to the third ACK / NACK position. The reverse is also possible.
- the position of the individual ACK / NACK maintains the same form for each subframe, it is possible to change the position of the individual ACK / NAKC in units of slots. For example, in even-numbered slots, ACK / NACK for the first transport block of the SCC in the third ACK / NACK position, ACK / NACK for the second transport block in the ACK / NACK in the fourth ACK / NACK position. Can be assigned. On the other hand, in the odd-numbered slots, the ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position and the ACK / NACK for the second transport block to the third ACK / NACK position. The reverse is also possible.
- the ACK / NACK performance equalization scheme described above is applied to the transport block of the SCC in consideration of PCC fallback.
- the following example illustrates changing only the order of ACK / NACK.
- PCC fallback it is also possible to mix the order of ACK / NACK for the second transport block of the PCC and ACK / NACK for the transport block of the SCC within the ACK / NACK state.
- PCC fallback it is possible to equalize ACK / NACK performance in more ways.
- the above-described ACK / NACK performance equalization scheme may be equally applied to PCC.
- within the ACK / NACK state can be mixed with each other without restriction ACK / NACK on the transport block of the PCC and SCC.
- the corresponding ACK / NACK state is mapped to have a constellation such as PUCCH format lb (QPSK) (referred to as two codeword fallbacks).
- QPSK PUCCH format lb
- 17 to 18 illustrate a 3-bit ACK / NACK mapping method according to an embodiment of the present invention. This example assumes that a MIMO CC and a non-MIMO CC are merged.
- the resource linked with PCC PDCCH is PUCCH # 1.
- the resource linked with SCC PDCCH is PUCCH # 3 (not shown).
- the 2-bit ACK / NACK information for the transport block of the MIMO PCC is allocated to the MSB 2-bit of the overall ACK / NACK information, and the 1-bit ACK / NACK information for the transport block of the non-MIMO SCC is LSB 1 of the full ACK / NACK information. Can be assigned to a bit.
- the entire ACK / NACK information corresponds to an ACK / NACK state (ie, a plurality of ACK / NACKs).
- the resources linked to the PCC PDCCH are PUCCH # 1, and the resources linked to the SCC PDCCH are PUCCH # 2 and # 3 (not shown).
- the 1-bit ACK / NACK information for the transport block of the non-MIMO PCC is allocated to the MSB 1-bit of the full ACK / NACK information
- the 2-bit ACK / NACK information for the transport block of the MIMO SCC is all ACK / NACK information It can be allocated to the LSB 2 bits of.
- the resource linked with the MIMO CC PDCCH may be MIMO PUCCH # 1, # 2, and the resource linked with the non-MIMO CC PDCCH may be Non-MIMO PUCCH # 1.
- the 2-bit ACK / NACK information for the transport block of the MIMO CC is allocated to the MSB 2 bits of the overall ACK / NACK information, and the 1-bit ACK / NACK information for the transport block of the non-MIMO CC is the LSB of the overall ACK / NACK information. Assigned to 1 bit.
- the MSB and LSB are allocated within the entire ACK / NACK information.
- the order of allocated ACK / NACK bits is changed, the order of PUCCH resources used may also be changed.
- the columns may be entirely changed in the ACK / NACK mapping table of Table 9 below.
- MIM0PUCCH # 1 (PUCCH # 1)
- MIMO PUCCH # 2 (PUCCH # 2)
- Non-MIMO PUCCH # 1 (PUCCH # 3) columns
- Non-MIMO PUCCH # 1 (PUCCH # 3)
- MIMO PUCCH # 2 (PUCCH # 2)
- MIMO PUCCH # 1 (PUCCH # 1)
- the options 1 to 4 of FIG. 17 may be considered.
- NNN state # 0
- NAN state # 2
- N state # 6
- state # 4 are mapped to MCC PUCCH # 1.
- ANA state # 5
- MA state # 7
- NAA state # 3
- NNA state # 1
- DDN state # 8
- DDN a state different from that of the single codeword fallback (see FIG. 12), that is, DDN (state # 8) is added.
- DDN (state # 8) is added to enable the single codeword fallback function when the PCC is non-MIMO.
- DDN (state # 8) refers to a case in which the UE does not receive the SCC MIM0 mode PDCCH (ie, DTX, DD) and the PCC PDSCH is NACK. It can be understood that the decoupling of the NNN (state # 0) to the NNN (state # 0) and the DDN (state # 8).
- NNN (state # 0) represents NND or NNN.
- the DDN (state # 8) is transmitted.
- the ACK / NACK state is mapped to PUCCH resources. It may be configured to minimize the Hamming distance between adjacent states in the QPSK constellation (e.g. using gray coding) and to maximize the Euclidean distance of the ACK / NACK state on constellations. 18 shows an example of mapping option 1 to PUCCH resources.
- the states 0, 2, 6, and 4 assigned to MCC PUCCH # 1 are each QPSK like PUCCH format lb (QPSK) to support the fallback function when the PCC is in MIM0 mode. (00), (01), (11), and (10). Gray coding is applied to states 5, 7, and 3 assigned to MCCPUCCH # 2 and is mapped to QPSK constellations (00), (01), and (11) to maximize the Euclidean distance. Similarly, Non-MCCPUCCH # l Gray coding is also applied at, mapping to maximize the Euclidean distance.
- option 1 to maximize the Euclidean distance between gray coding and each state (eg, constellation rotation) (see FIG. 14).
- Table 9 shows an ACK / NACK mapping table according to FIG. 18.
- HARQ-ACK (0) ⁇ (1) is HARQ ACK (A) / NACK (N) / DTX (for PDSCH on PCC (or SPS release PDCCH on PCC) D) results
- HARQ-ACK (2) may indicate a HARQ ACK (A) / NACK (N) / DTX (D) result for the PDSCH on the SCC.
- N represents NACK or DTX.
- MIMO PUCCH # 1 to # 2 may indicate a PUCCH resource (index) linked with the minimum CCE index n CCE and the next CCE index n CCE + l constituting the PCC PDCCH, respectively.
- Non-MIMO PUCCH # 1 may be a PUCCH resource (index) linked with a CCE constituting the SCC PDCCH (in case of cross-carrier scheduling) or a PUCCH resource (index) indicated / assigned using ARI (non-cross) -For carrier scheduling).
- HARQ-ACK (0) ⁇ (1) is a HARQ ACK (A) / NACK (N) / DTX (D) results for the PDSCH on the SCC HARQ-ACK (2) may indicate HARQ ACK (A) / NAC (N) / DTX (D) results for PDSCH on PCC (or SPS release PDCCH on PCC).
- N represents NACK or DTX.
- MIMO PUCCH # 1 ⁇ # 2 is the PUCCH resource (index) linked with the minimum CCE index n CCE and the next CCE index nc CE + l constituting the SCC PDCCH (in case of cross-carrier scheduling), or indicated using ARI. It may be allocated PUCCH resource (index) (non-cross-carrier scheduling case).
- Non-MIMO PUCCH # 1 may indicate a PUCCH resource (index) linked with the minimum CCE n CCE constituting the PCC PDCCH.
- the ACK / NACK mapping table of Table 10 may be considered.
- the mapping in Table 10 also supports fallback in the DL PCC.
- the NNN may be decoupled with the DTX or may be coupled with the DTX. That is, according to an embodiment, the NNN state may be DDN or NND.
- each of the ACK / NACK states in options 2-4 can be mapped to QPSK symbols on the corresponding PUCCH resources, taking into account various ways to maximize gray coding and Euclidean distance. Can be.
- bit-by-bit ACK / NACK performance may vary. This is because the number (type) of resources used when selecting the ACK / NACK is different for each ACK / NACK bit, and the usage form of the QPSK property may be different.
- a method of changing the position of each ACK / NACK in the ACK / g NACK state according to a predetermined rule can be considered. By mixing the positions of individual ACK / NACK in the ACK / NACK state, the effect of equalizing the performance of each ACK / NACK bit can be obtained.
- the position of each ACK / NACK in the ACK / NACK state can be changed over time. For example, when it is set to SCC MIMO, at one time, the ACK / NACK for the first transport block of the SCC is placed in the first ACK / NACK position (ie, corresponding to the MSB) and the ACK for the second transport block. / NACK can be assigned to the second ACK / NACK position. Meanwhile, at another time point, the ACK / NACK for the first transport block of the SCC is converted to the second ACK / NACK. In position, ACK / NACK for the second transport block may be allocated to the first ACK / NACK position.
- the time point for changing the position of the individual ACK / NACK in the ACK / NACK state may be in a subframe unit. For example, in an even-numbered subframe, ACK / NACK for the first transport block of the SCC may be allocated to the first ACK / NACK position and ACK / NACK for the second transport block to the second ACK / NACK position. . On the other hand, in an odd numbered subframe, ACK / NACK for the first transport block of the SCC can be allocated to the second ACK / NACK position and ACK / NACK for the second transport block. The reverse is also possible.
- each ACK / NACK may be maintained in the same form for each subframe, and the position of each ACK / NAKC may be changed in units of slots. For example, in even-numbered slots, ACK / NACK for the first transport block of the SCC in the first ACK / NACK position, and ACK / NACK all ACK / NACK for the second transport block in the second ACK / NACK position. Can be assigned. On the other hand, in the odd-numbered slots, the ACK / NACK for the first transport block of the SCC can be allocated to the second ACK / NACK position and the ACK / NACK first ACK / NACK position for the second transport block. The reverse is also possible.
- the ACK / NACK performance equalization scheme described above illustrates a case in which only the order of ACK / NACK is changed in the transport block of the SCC in consideration of PCC fallback.
- PCC fallback is not considered, it is possible to equalize ACK / NACK performance in more ways.
- the ACK / NACK performance equalization scheme described above may be equally applied even when the PCC is set to the MIM0 mode.
- ACK / NACK can be mixed with each other in the transport block of the PCC and SCC without distinguishing the CC.
- both DL PCC and DL SCC operate in MIM0 mode.
- Four PUCCH resources are used for ACK / NACK channel selection.
- the resources linked to the PCC PDCCH are PCC PUCCH # 1 and # 2
- the resources linked to the SCCPDCCH are SCCPUCCH # 1 and # 2.
- 2-bit ACK / NACK information for the transport block of the MIM0 DL PCC is the entire ACK.
- the 2-bit ACK / NACK information for the transport block of the MIMO DL SCC may be allocated to the MSB 2-bit of the / NACK information and the LSB2 bit of the overall ACK / NACK information.
- the entire ACK / NACK information corresponds to the ACK / NACK state (ie, plural ACK / NACKs).
- PCC PUCCH # 1 when compared to a single codeword fallback (eg, 15 to 16), except for the case of PCC PUCCH # 1, the rest represent the same mapping scheme. That is, PCC PUCCH # 1 is similar to the options illustrated in the single codeword fallback described above, except that it must be able to support two codeword fallbacks and thus have a mapping such as the PUCCH format lb. In order to support two codeword PCC fallbacks, the PCC PUCCH # 1 mapping must be identical to the PUCCH format lb mapping, so that the 0, 4, 12, and 8 states are each QPSK constellation on PCC PUCCH # 1 (00) Maps to (01), (11), and (10)
- mapping the ACK / NACK state to PUCCH resources minimizes the Hamming distance between adjacent states in the QPSK constellation (e.g. using gray coding), and It may be configured to maximize the Euclidean distance of the / NACK state.
- 20 shows an example of mapping option 1 to PUCCH resources.
- PCC PUCCH # 1 In order to support two codeword fallbacks, 0, 4, 12, and 8 ACK / NACK states on PCC PUCCH # 1 are QPSK properties (00), (01), and (11), respectively. , Mapped to (10). Within PCC PUCCH # 1, gray coding is not satisfied due to a limitation on the fallback function. However, the remaining resources (PCC PUCCH # 2, SCC PUCCH # 1, # 2) use the four available states to show the mapping to maximize gray coding and Euclidean distance for ACK / NACK voicing performance optimization. Can be configured.
- Table 11 shows an ACK / NACK mapping table according to FIG. 20.
- HARQ-ACK (0) ⁇ (1) shows the HARQ ACK (A) / NACK (N) / DTX (D) results for the PDSCH (or SPS release PDCCH on the PCC) on the PCC.
- HARQ-ACK (2) to (3) shows the HARQ ACR (A) / NACK (N) / DTX (D) results for the PDSCH on the SCC.
- N represents NACK or DTX.
- PCC PUCCH # 1 to # 2 may indicate a PUCCH resource (index) linked with a minimum CCE index n CCE and a next CCE index n CCE + l constituting the PCC PDCCH, respectively.
- SCC PUCCH # 1 ⁇ # 2 is the PUCCH resource (index) linked with the minimum CCE index n CCE and then CCE index n CCE + l constituting the SCC PDCCH (in case of cross-carrier scheduling) or indicated / assigned using ARI.
- PUCCH resource (index) may be used (non-cross-carrier scheduling case).
- Option 1 several options are available to maximize the Euclidean distance between gray coding and each state (eg constellation rotation).
- options 2 to 4 may consider various methods for maximizing the gray coding scheme and the Euclidean distance.
- mappings in which four state bundles mapped to each of SCC PUCCH # 1 and SCC PUCCH # 2 are interchanged may be considered. For example, in case of option 1, states 2, 6, 14, and 10 may be assigned to SCC PUCCH # 1, and states 1, 2, 11, and 9 may be assigned to SCC PUCCH # 2.
- bit-by-bit ACK / NACK performance may vary. This is because the number (type) of resources used when selecting the ACK / NACK is different for each ACK / NACK bit, and the usage form of the QPSK property may be different.
- a method of changing the position of each ACK / NACK in the ACK / NACK state according to a predetermined rule can be considered. have. By mixing the positions of individual ACK / NACK in the ACK / NACK state, the effect of equalizing the performance of each ACK / NACK bit can be obtained.
- the position of each ACK / NACK in the ACK / NACK state can be changed over time. For example, when the SCC is set to MIM0, at one point, the ACK / NACK for the first transport block of the SCC is placed in the third ACK / NACK position, and the ACK / NACK for the second transport block is the fourth ACK. / NACK position (ie, LSB) can be assigned. On the other hand, at another time point, the ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position and the ACK / NACK for the second transport block to the third ACK / NACK position.
- the effect of equalizing the ACK / NACK performance on the two transport blocks of the SCC on the time axis can be obtained.
- the time point for changing the position of the individual ACK / NACK in the ACK / NACK state may be in a subframe unit. For example, in an even-numbered subframe, ACK / NACK for the first transport block of the SCC may be allocated to the third ACK / NACK position, and ACK / NACK for the second transport block may be allocated to the fourth ACK / NACK position. . On the other hand, in an odd-numbered subframe, ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position and ACK / NACK for the second transport block to the third ACK / NACK position. The reverse is also possible.
- the position of the individual ACK / NACK maintains the same form for each subframe, it is possible to change the position of the individual ACK / NAKC per slot unit. For example, in an even numbered slot, ACK / NACK for the first transport block of the SCC In the third ACK / NACK position, ACK / NACK for the second transport block can be assigned to the ACK / NACK to the fourth ACK / NACK position. On the other hand, in the odd-numbered slots, ACK / NACK for the first transport block of the SCC can be allocated to the fourth ACK / NACK position and ACK / NACK for the second transport block to the third ACK / NACK position. The reverse is also possible.
- the ACK / NACK performance equalization scheme described above illustrates a case in which only the order of ACK / NACK is changed in the transport block of the SCC in consideration of PCC fallback.
- PCC fallback it is also possible to mix the order of ACK / NACK for the second transport block of the PCC and ACK / NACK for the transport block of the SCC within the ACK / NACK state.
- the ACK / NACK performance equalization scheme described above may be equally applied even when the PCC is set to the MIM0 mode.
- the ACK / NACK state can be mixed with each other without restriction of the ACK / NACK corresponding to the transport block of the PCC and SCC.
- NACK and DTX are not distinguished and these are represented as NACK.
- 2 (state # 0) in the 2-bit ACK / NACK selection mapping indicates the state of Table 12. Since DTX / DTX is not transmitted, it is excluded from the table below. Table 12
- Table 12 when the terminal supports the single codeword fallback function, only cases 2 and 3 of Table 12 can be transmitted using the NN (state # 0). That is, the terminal has a PCC of DTX and an SCC of NACK. The inevitably prevents the transmission.
- a specific mapping scheme for additionally transmitting a state in which such transmission is not possible through NACK / DTX decoupling is proposed.
- the present example proposes a method of transmitting the decoupled PCC DTX state using the remaining state.
- the present example also proposes a method of transmitting the state in which the PCC is DTX and the SCC is ACK using the remaining state.
- 21 through 23 illustrate 2-bit ACK / NACK mapping according to an embodiment of the present invention.
- This example shows an example of additionally mapping a DN (ie, PCC DTX, SCC NACK) to an unused QPSK constellation point (01) or (10) of SCC PUCCH # 1 in FIG. 11.
- DN ie, PCC DTX, SCC NACK
- the DN state is mapped to the QPSK constellation point (01) of SCC PUCCH # 1.
- 22 to 23 show examples of applying gray coding to SCC PUCCH # 1 as a modification of FIG. 21.
- the method of adding DA instead of DN to the constellation point of SCC PUCCH # 1 Can be considered By adding DA instead of DN, it is possible to keep the hamming distance with neighboring states (eg, in the case of FIG. 21 or NA) in the physical channel to a minimum.
- Table 13 shows an ACK / NACK mapping table according to FIG. 21.
- Example 2 in order to support two codeword fallback all, the mapping all inevitably decoupled the DDN state was considered. Therefore, in this example, in the single codeword fallback according to Embodiment 1, both the PCC DTX and the SCC are NACK (that is, DDN when the PCC is MIM0 and D ⁇ when the PCC is non-MIMO) are not used on the SCC PUCCH resource. You can consider how you map to the same or different constellation points that you did not have.
- FIG. 24 to 26 illustrate 3-bit ACK / NACK mapping according to an embodiment of the present invention.
- FIG. 24 shows an example in which DDNs and DNNs are mapped to QPSK constellation points (01) and (10) on SCC PUCCH resources (ie, PUCCH # 3), respectively.
- 25 shows an example in which both the DDN and the DNN are mapped to the QPSK constellation point (01) on an SCC PUCCH resource (ie, PUCCH # 3).
- FIG. 26 shows an example in which both the DDN and the DNN are mapped to the QPSK constellation point 10 on an SCC PUCCH resource (ie, PUCCH # 3).
- 25 to 26 are gray coding applied to an SCC PUCCH resource (ie, PUCCH # 3).
- the DNN state does not exist. If the PCC is non-MIMO, specify that there is no DDN state.
- DAA / DDA instead of DDN / DNN to the constellation point of the SCC PUCCH resource (ie, PUCCH # 3) may be considered.
- DAA / DDA can be added instead of DDN / DNN.
- Table 14 shows an ACK / NACK mapping table according to FIG. 24.
- the 2-bit ACK / NACK mapping table considering DTX is as follows.
- N means NACK and ND means NACK or DTX.
- N NACK
- ND NACK or DTX.
- FIGS. 27-29 illustrate 4-bit ACK / NACK mapping considering DTX.
- the mapping example of FIGS. 27 to 29 may be used as a single mapping for 1-bit ACK / NACK to 4-bit ACK / NACK.
- 1-bit ACK / NACK in FIG. 27 or is transmitted in the first PUCCH resource.
- 2-bit ACK / NACK A 2 / A 2 or N 2 / A 2 is transmitted in the 2nd or 2nd PUCCH resources in the first PUCCH resource.
- 3-bit ACK / NACK I I in the first PUCCH resource or A 2 / A 2 / N 3 or in the second PUCCH resource
- each ACK / NACK state is transmitted by selecting a QPSK constellation point of one of four PUCCH resources as shown. 28 to 29, as described with reference to FIG. 27, the 1-bit ACK / NACK to the 4-bit ACK / NACK may be configured through one mapping method.
- a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120.
- Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116.
- the processor 112 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 114 is connected with the processor 112 and stores various information related to the operation of the processor 112.
- the RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal.
- Terminal 120 includes a processor 122, a memory 124, and an RF unit 126.
- the processor 122 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122.
- the RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
- the base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.
- embodiments of the present invention have been mainly described based on data transmission / reception relations between a terminal and a base station.
- Certain operations described in this document as being performed by a base station may, in some cases, be performed by their upper node. That is, it is apparent that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, etc.
- the terminal may also be a UE Jser Equipment (MS), a Mobile St at ion (MS), It may be replaced with terms such as MSS (Mobile Subscriber Station).
- MSS Mobile Subscriber Station
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- one embodiment of the present invention may include one or more ASICs (capacitor specific integrated circuits), DSPs digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs Cfield programmable gate arrays. ), A processor, a controller, a micro controller, a micro processor, or the like.
- an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit is located inside or outside the processor, and various known parts It is possible to exchange data with the processor by means.
- the present invention can be used in a wireless communication device such as a terminal, a relay, a base station, and the like.
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US13/823,687 US8891348B2 (en) | 2010-09-15 | 2011-09-15 | Method and apparatus for transmitting control information |
KR1020137007168A KR101802762B1 (ko) | 2010-09-15 | 2011-09-15 | 제어 정보를 전송하는 방법 및 이를 위한 장치 |
CN201180044657.2A CN103109487B (zh) | 2010-09-15 | 2011-09-15 | 用于传输控制信息的方法和装置 |
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CN109921885B (zh) * | 2012-04-20 | 2021-11-26 | 北京三星通信技术研究有限公司 | 支持发送分集和信道选择的分配harq-ack信道资源的方法 |
US11387953B2 (en) | 2012-04-20 | 2022-07-12 | Samsung Electronics Co., Ltd. | Method and apparatus for allocating HARQ-ACK channel resources supporting transmit diversity and channel selection |
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EP3809759A3 (en) * | 2012-10-05 | 2021-05-12 | Interdigital Patent Holdings, Inc. | Method and apparatuses for transmitting feedback |
Also Published As
Publication number | Publication date |
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US8891348B2 (en) | 2014-11-18 |
WO2012036473A3 (ko) | 2012-05-03 |
EP2618515B1 (en) | 2018-11-07 |
US20130176929A1 (en) | 2013-07-11 |
EP2618515A2 (en) | 2013-07-24 |
KR20130109120A (ko) | 2013-10-07 |
CN103109487B (zh) | 2015-10-21 |
KR101802762B1 (ko) | 2017-11-29 |
EP2618515A4 (en) | 2017-11-15 |
CN103109487A (zh) | 2013-05-15 |
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