WO2011132963A2 - 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치 - Google Patents
무선 통신 시스템에서 제어 정보의 전송 방법 및 장치 Download PDFInfo
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- WO2011132963A2 WO2011132963A2 PCT/KR2011/002881 KR2011002881W WO2011132963A2 WO 2011132963 A2 WO2011132963 A2 WO 2011132963A2 KR 2011002881 W KR2011002881 W KR 2011002881W WO 2011132963 A2 WO2011132963 A2 WO 2011132963A2
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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
- H04L27/2633—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators using partial FFTs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- 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
- H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
- H04B7/0613—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
- H04B7/0667—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 delayed versions of same signal
- H04B7/0669—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 delayed versions of same signal using different channel coding between antennas
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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
- H04B7/0667—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 delayed versions of same signal
- H04B7/0671—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 delayed versions of same signal using different delays between antennas
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting control information.
- the wireless communication system can support carrier aggregation (CA).
- CA carrier aggregation
- 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 (0FDMA) systems, and single carrier (SC-FDMA) systems. frequency division multiple access) systems.
- An object of the present invention is to provide a method and an apparatus therefor for efficiently transmitting control information in a wireless communication system. Another object of the present invention is to provide a channel format, signal processing, and an apparatus therefor for efficiently transmitting control information. It is still another object of the present invention to provide a method for efficiently allocating resources for transmitting control information and an apparatus therefor.
- a method for transmitting control information through a physical uplink control channel (PUCCH) by a terminal in a wireless communication system comprising: obtaining a first modulation symbol and a second modulation symbol from the control information; Spreading the first modulation symbol into a plurality of subcarriers in the frequency domain; Spreading the first modulation symbol spread in the frequency domain into a plurality of adjacent first SC-FDMA symbols in the time domain; Spreading the second modulation symbol into a plurality of subcarriers in the frequency domain; Spreading the second modulation symbol spread in the frequency domain into the plurality of contiguous one SC-FDMA symbols in the time domain; And transmitting the spread first modulation symbol and the spread second modulation symbol through the PUCCH.
- PUCCH physical uplink control channel
- a terminal configured to transmit control information through a physical uplink control channel (PUCCH) in a wireless communication system, the terminal comprising: a radio frequency (RF) unit; And a processor, wherein the processor obtains a first modulation symbol and a second modulation symbol from the control information, spreads the first modulation symbol into a plurality of subcarriers in a frequency domain, and spreads the first modulation symbol in the frequency domain.
- PUCCH physical uplink control channel
- RF radio frequency
- a terminal is provided that is configured to spread to adjacent first SC-FDMA symbols of and to transmit the spread first modulation symbol and the spread second modulation symbol on the PUCCH.
- the frequency spreading sequence used to spread the first modulation symbol and the second modulation symbol in the frequency domain may be generated from a combination of basic sequence and cyclic shift.
- first frequency spreading sequence used for the first modulation symbol and the second frequency spreading sequence used for the second modulation symbol have the same basic sequence. Cyclic shift values can be different.
- the time spreading sequence used to spread the first modulation symbol and the second modulation symbol in the time domain includes an orthogonal code, and the same orthogonal code is applied to the first modulation symbol and the second modulation symbol. Can be.
- the first modulation symbol and the second modulation symbol may be transmitted through multiple antennas, and precoding may be applied to the first modulation symbol and the second modulation symbol in a space-code domain.
- the aspect may include obtaining a third modulation symbol and a fourth modulation symbol from the control information; Spreading the third modulation symbol into a plurality of subcarriers in the frequency domain; Spreading the third modulation symbol spread in the frequency domain into a plurality of adjacent second SC-FDMA symbols in the time domain; Spreading the fourth modulation symbol into a plurality of subcarriers in the frequency domain; Spreading a fourth modulation symbol spread in the frequency domain into the plurality of adjacent second SC-FDMA symbols in the time domain; And a processor configured to transmit or perform the spread third modulation symbol and the spread fourth modulation symbol on the PUCCH, wherein the plurality of contiguous first SC-FDMA symbols and the plurality of contiguous first symbols are performed.
- Two SC-FDMA symbols may be located in the same slot.
- control information can be efficiently transmitted in a wireless communication system.
- FIG. 1 illustrates physical channels used in a 3GPP LTE system, which is an example of a wireless communication system, and a general signal transmission method using the same.
- FIG. 5 illustrates a signal mapping scheme in the frequency domain to satisfy a single carrier characteristic.
- FIG. 6 illustrates a signal processing procedure in which DFT process output samples are mapped to a single carrier in cluster SC—FDMA.
- FIG. 7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a cluster SC-FDMA.
- FIG. 10 illustrates a structure of an uplink subframe.
- FIG. 11 illustrates a signal processing procedure for transmitting a reference signal (RS) in uplink.
- RS reference signal
- DMRS demodulation reference signal
- 13-14 illustrate slot level structures of the PUCCH formats la and lb.
- 15-16 illustrate the slot level structure of the PUCCH format 2 / 2a / 2b.
- 17 illustrates ACK / NACK channelization for PUCCH formats la and lb.
- 20 illustrates a concept of managing a downlink component carrier at a base station.
- 21 illustrates a concept of managing an uplink component carrier in a terminal.
- 22 illustrates a concept in which one MAC manages multicarriers in a base station.
- 23 illustrates a concept in which one MAC manages multicarriers in a terminal.
- 24 illustrates a concept in which one MAC manages multicarriers in a base station.
- 25 illustrates a concept in which a plurality of MACs manage a multicarrier in a terminal.
- 26 illustrates a concept in which a plurality of MACs manage a multicarrier in a base station.
- 27 illustrates a concept in which one or more MACs manage a multicarrier from a reception point of a terminal.
- 28 illustrates asymmetric carrier merging with a plurality of DL CCs and one UL CC linked.
- 29-30 illustrate slot 0 in a subframe according to an embodiment of the present invention.
- 31 illustrates a PUCCH format to which channel selection and SF reduction are applied according to an embodiment of the present invention, and a signal processing procedure therefor.
- 32 to 33 illustrate a transmit diversity method according to an embodiment of the present invention.
- 3435 illustrates a transmit diversity method according to another embodiment of the present invention.
- CDMA code division mult iple access
- FDMA frequency division mult iple access
- FDMA TDMACtime division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA is the Global System for Mobile It can be implemented with wireless technologies such as c ommunications (GPRS) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GPRS c ommunications
- GPRS General 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, Evolved UTRA (E-UTRA).
- UTRA is part of the UMTS Universal Mobile Telecom® iications System.
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of E-Evolved UMTS (E-UMTS) using E-UTRA and LTE-A (Advanced) is an evolved version of 3GPP LTE.
- 3GPP LTE long term evolution
- E-UMTS E-Evolved UMTS
- LTE-A Advanced
- the UE downlink from the base station to: receive, via the information (Downlink DL), and the MS uplink to a base station: transmits the information over the (Uplink UL).
- the information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type / use of the information transmitted and received.
- FIG. 1 is a diagram for explaining physical channels used in a 3GPP LTE system and a general signal transmission method using the same.
- the initial cell search operation such as synchronizing with the base station is performed in step S101.
- the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S—SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.
- the terminal may receive a physical broadcast channel from the base station to acquire broadcast information in the cell.
- the terminal may receive a downlink reference signal (DL RS) in an initial cell search step. It can receive and check the downlink channel state.
- DL RS downlink reference signal
- the UE After completing the initial cell search, the UE receives the physical downlink control channel (PDCCH) and the physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S102. Specific system information can be obtained.
- PDCCH physical downlink control channel
- PDSCH physical downlink control channel
- the terminal may perform a random access procedure such as steps S103 to S106 to complete the access to the base station.
- the UE transmits a preamble through a physical random access channel (PRACH) (S103), and a voice response message for the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S104).
- PRACH physical random access channel
- S104 a content ion resolution procedure such as transmission of an additional physical random access channel (S105) and a physical downlink control channel and receiving a physical downlink shared channel (S106) can be performed. have.
- the UE After performing the above-described procedure, the UE performs a physical downlink control channel / physical downlink shared channel reception (S107) and a physical uplink shared channel as a general uplink / downlink signal transmission procedure.
- S107 physical downlink control channel / physical downlink shared channel reception
- S107 physical uplink shared channel
- UCI Physical Uplink Control Channel
- the control information transmitted from the terminal to the base station is collectively referred to as uplink control information (UCI).
- UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgment / Negative-ACK), SR (Scheduling Request), Channel Quality Indication (CQ I), PMK Precoding Matrix Indication (RMK), and RKRank Indication (RQ).
- the UCI is generally transmitted through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time.
- the UCI may be aperiodically transmitted through the PUSCH according to a network request / instruction.
- FIG. 2 is a diagram illustrating a signal processing procedure for transmitting a UL signal by the terminal.
- scrambling modules 210 of the terminal may scramble the transmission signal using the terminal specific scramble signal.
- the scrambled signal is input to the modulation mapper 220, depending on the type of transmission signal and / or the channel state. It is modulated into a complex symbol by using Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPS), or Quadrature Amplitude Modulation (16QAM / 64QAM).
- BPSK Binary Phase Shift Keying
- QPS Quadrature Phase Shift Keying
- 16QAM / 64QAM Quadrature Amplitude Modulation
- 3 is a diagram for describing a signal processing procedure for transmitting a downlink signal by a base station.
- the base station may transmit one or more codewords in downlink.
- the codewords may each be processed into complex symbols via the scrambled mode 301 and the modulation mapper 302 as in the uplink of FIG. 2, after which the complex symbols may be processed by the layer mapper 303 into a plurality of layers ( Layer), and each layer may be multiplied by the precoding matrix by the precoding modes 304 and assigned to each transmit antenna.
- the transmission signals for each antenna processed as described above are respectively mapped to time_frequency resource elements by the resource element mapper 305 and then transmitted through each antenna via a 0rthogonal frequency division multiple access (0FDM) signal generator 306. Can be.
- 0FDM 0rthogonal frequency division multiple access
- the uplink signal transmission uses the Single Carrier-Frequency Division Multiple Access (SC-FDMA) scheme, unlike the 0FDMA scheme used for the downlink signal transmission.
- SC-FDMA Single Carrier-Frequency Division Multiple Access
- 3GPP system adopts 0FOMA in downlink and SC-FDMA in uplink
- both a terminal for uplink signal transmission and a base station for downlink signal transmission include a serial-to-parallel converter (401), a subcarrier mapper (403), and an M-point IDFT module (404). ) And Cyclic Prefix (mod) mod 406 It is the same in the point of inclusion.
- the terminal for transmitting a signal in the SC-FDMA scheme further includes an N ⁇ point DFT models 402.
- the N-point DFT models 402 partially offset the IDFT processing impact of the M-point IDFT module 404 so that the transmission signal has a single carrier property.
- FIG. 5 is a diagram illustrating a signal mapping method in a frequency domain for satisfying a single carrier characteristic in the frequency domain.
- FIG. 5 (a) shows a localized mapping method
- FIG. 5 (b) shows a distributed mapping method.
- Clustered SOFDMA a modified form of SC-FDMA, is described.
- Clustered SC-FDMA divides DFT process output samples into sub-groups during subcarrier mapping and discontinuously maps them to the frequency domain (or subcarrier domain).
- FIG. 6 is a diagram illustrating a signal processing procedure in which DFT process output samples are mapped to a single carrier in a cluster SC-FDMA.
- 7 and 8 are diagrams illustrating a signal processing procedure in which DFT process output samples are mapped to multicarriers in a cluster SC—FDMA. 6 shows an example of applying an intra-carrier cluster SC—FDMA, and FIGS. 7 and 8 correspond to an example of applying an inter-carrier cluster SC-FDMA.
- FIG. 7 illustrates a case where a signal is generated through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a state in which component carriers are contiguous in the frequency domain.
- FIG. 8 illustrates a case where a signal is generated through a plurality of IFFT blocks in a situation in which component carriers are allocated non-contiguous in the frequency domain.
- Segment SC ⁇ FDMA uses the same number of IFFTs as any number of DFTs.
- NxSC-FDMA NxDFT-s-OFDMA
- NxSC-FDMA NxDFT-s-OFDMA
- This specification collectively names them Segment SC-FDMA.
- the segment SC-FDMA performs a DFT process on a group basis by grouping all time domain modulation symbols into N (N is an integer greater than 1) groups in order to alleviate a single carrier characteristic condition.
- FIG. 10 illustrates a structure of an uplink subframe.
- an uplink subframe includes a plurality of slots (eg, two).
- the slot may include different numbers of SC-FDMA symbols according to CP Cyclic Prefix) length.
- a slot may include seven SC-FDMA symbols.
- the uplink subframe is divided into a data region and a control region.
- the data area includes a PUSCH and is used to transmit data signals such as voice.
- the control region includes a PUCCH and is used to transmit control information.
- the uplink control information ie, UCI
- the uplink control information includes HARQ ACK / NACK, Channel Quality Information (CQI), PMK Precoding Matrix Indicator (RQank), and RKRank Indication.
- FIG. 11 is a diagram illustrating a signal processing procedure for transmitting a reference signal in the uplink.
- Data is converted into a frequency domain signal through a DFT precoder, and then transmitted through the IFFT after frequency mapping, while RS skips the process through the DFT precoder.
- the RS sequence is immediately generated (S11) in the frequency domain, the RS is sequentially transmitted through a localization mapping process (S12), an IFFKS13 process, and a cyclic prefix (CP) attach process (S14).
- S12 localization mapping process
- CP cyclic prefix
- RS sequence ( ()) is defined by the cyclic shift (cycl ic shift) a of the base sequence (base sequence) and can be expressed as Equation (1).
- Equation 1 Where sc sc is the length of an RS sequence, N is the size of a resource block expressed in subcarrier units, and m is 1 ⁇ ? « ⁇ ⁇ ⁇ .
- the ⁇ table indicates the maximum uplink transmission band.
- the definition of the basic sequence r ⁇ (0 ⁇ ) '... ⁇ r'"( ⁇ M ⁇ RS -l ⁇ ) depends on the sequence length MM s R c S.
- a basic sequence with a length of 3 Nsc or more can be defined as For J s > 3N S ⁇ , the basic sequence, v ( 0 ) ""' r ", v ( ⁇ sc ⁇ 1 ) is given by Equation 2 below.
- Equation 3 the Q th root Zadoff-Chu sequence
- the length of the Zadoff-Chu sequence is given by the largest prime number, thus satisfying ⁇ ZC ⁇ M s C
- a basic sequence having a length less than SC may be defined as follows. First, the basic sequence for is given by Equation 5.
- the slot s may be defined as shown in Equation 6 following the sequence group number.
- mod represents the modulo operation
- Sequence group hopping may be enabled or disabled by a parameter that activates group hopping provided by a higher layer.
- PUCCH and PUSCH have the same hopping pattern but may have different sequence shift patterns.
- the group hopping pattern ⁇ g h (" s ) is the same for PUSCH and PUCCH and is given by Equation 7 below.
- the sequence generator may be initialized to "at the beginning of each radio frame. Sequence shift pattern The definitions differ from one another between the PUCCH and the PUSCH. -PUCCH PUCCH _ ⁇ y-cell, ⁇ ⁇
- the sequence shift pattern is s ⁇ V iD moa ⁇
- the sequence shift pattern ⁇ ; s is given by ⁇ usc ⁇ uccH + Ajmoc O.
- S G ⁇ , ⁇ , —, 29 ⁇ is constituted by higher layers.
- Sequence hopping is only applied for reference signals of length M sc ⁇ 6 ⁇ S c.
- Equation 8 For a reference signal of length ⁇ sc ⁇ 6Ar sc, the base sequence number in the base sequence group in slot S is given by Equation 8 below.
- the reference signal for the PUSCH is determined as follows.
- the physical mapping method for the uplink RS in the PUSCH is as follows.
- PRBs Physical Resource Blocks
- FIG. 12A illustrates a demodulation reference signal (DMRS) structure for a PUSCH in the case of a normal CP
- FIG. 12B illustrates a DMRS structure for a PUSCH in the case of an extended CP.
- the DMRS is transmitted through the fourth and eleventh SC-FDMA symbols
- the DMRS is transmitted through the third and ninth SC-FDMA symbols.
- PUCCH 13 through 16 illustrate a slot level structure of a PUCCH format.
- PUCCH includes the following format for transmitting control information.
- Table 4 shows a modulation scheme and the number of bits per subframe according to the PUCCH format.
- Table 5 shows the number of RSs per slot according to the PUCCH format.
- Table 6 is a table showing the SC-FDMA symbol position of the RS according to the PUCCH format.
- PUCCH formats 2a and 2b correspond to a standard cyclic prefix.
- the ACK / NACK signal includes a CG-CAZAC (Computer-Gene rated Constant Amplitude Zero Auto Correlation) sequence, a different cyclic shift (CS) (frequency domain code), and an orthogonal cover code or orthogonal cover code. This is transmitted through different resources consisting of OC or OCC (Time Domain Spreading Codes).
- 0C includes, for example, Walsh / DFT orthogonal code.
- a total of 18 terminals based on a single antenna may be multiplexed in the same physical resource block (PRB).
- Orthogonal sequences w0, wl, w2, w3 may be applied in any time domain (after FFT modulation) or in any frequency domain (before FFT modulation).
- ACK / NACK resources composed of CS, 0C, and PRB (Physical Resource Block) may be given to the UE through RRC (Radio Resource Control).
- RRC Radio Resource Control
- ACK / NACK resources may be implicitly given to the UE by the lowest CCE index of the PDCCH for the PDSCH.
- 15 shows PUCCH format 2 / 2a / 2b in the case of standard cyclic prefix.
- 16 shows PUCCH format 2 / 2a / 2b in case of extended cyclic prefix.
- 15 and 16 in the case of a standard CP, one subframe includes 10 QPSK data symbols in addition to the RS symbol. Each QPSK symbol is spread in the frequency domain by the CS and then mapped to the corresponding SC-FDMA symbol. SC-FDMA symbol level CS hopping can be applied to randomize inter-cell interference.
- RS can be multiplexed by CDM using cyclic shift. For example, assuming that the number of available CSs is 12 or 6, 12 or 6 terminals may be multiplexed in the same PRB, respectively.
- a plurality of UEs in PUCCH formats 1 / la / lb and 2 / 2a / 2b may be multiplexed by CS + 0C + PRB and CS + PRB, respectively.
- Orthogonal sequences (0C) of length -4 and length C 3 for PUCCH format 1 / la / lb are shown in the following table. And as shown in Table 8.
- Figure 17 shows ACK / NACK channelization for PUCCH formats la and lb It is a figure explaining.
- Figure 17 corresponds to the case where ⁇ ⁇ ⁇ .
- Cyclic Shift (CS) hopping and Orthogonal Cover (0C) remapping can be applied as follows:
- the resource () for PUCCH format 1 / la / lb includes the following combination.
- the representative index n r includes n cs , n oc , n rb .
- CQI, PMI, RI, and CQI and ACK / NACK may be delivered through PUCCH format 2 / 2a / 2b.
- Reed Muller (RM) channel coding may be applied.
- channel coding for UL CQI in LTE system is described as follows.
- the bit stream ⁇ 1- ⁇ is channel coded using the (20, A) RM code.
- Table 10 is a table showing the basic sequence for the (20, A) code.
- ⁇ ° and I1 indicate the Most Significant Bit (MSB) and the Least Significant Bit (LSB).
- MSB Most Significant Bit
- LSB Least Significant Bit
- QPSK modulation can be applied. Before QPSK modulation, the coded bits can be scrambled.
- Table 11 shows an Uplink Control Information (UCI) field for wideband reporting (single antenna port, transmit diversity or open loop spatial multiplexing (PDSCH) CQI feedback).
- UCI Uplink Control Information
- Table 12 shows the UCI fields for CQI and PMI feedback for wideband, which report closed loop spatial multiplexing PDSCH transmissions. .
- Table 13 shows a UCI field for RI feedback for wideband reporting.
- Table 13 19 is a diagram illustrating PRB allocation. As shown in Figure 19, PRB may be used for the PUCCH transmission in slot n s.
- a multicarrier system or a carrier aggregation system refers to a system that aggregates and uses a plurality of carriers having a band smaller than a target bandwidth for wideband support.
- the band of the aggregated carriers may be limited to the bandwidth used by the existing system for backward compatibility with the existing system.
- the existing LTE system supports bandwidths of 1.4, 3, 5, 10, 15, and 20 MHz
- the LTE-A (LTE-Advanced) system improved from the LTE system uses only the bandwidths supported by LTE. It can support bandwidth greater than 20MHz.
- Multicarrier is a name that can be used commonly with carrier aggregation and bandwidth aggregation.
- carrier aggregation collectively refers to both contiguous and non-contiguous carrier merging.
- FIG. 20 is a diagram illustrating a concept of managing downlink component carriers in a base station
- FIG. 21 is a diagram illustrating a concept of managing uplink component carriers in a terminal.
- the upper layers will be briefly described as MACs in FIGS. 20 and 21.
- 22 illustrates a concept in which one MAC manages multicarriers in a base station.
- 23 illustrates a concept in which one MAC manages multicarriers in a terminal.
- one MAC manages and operates one or more frequency carriers to perform transmission and reception. Frequency carriers managed in one MAC do not need to be contiguous with each other, which is advantageous in terms of resource management.
- one PHY means one component carrier for convenience.
- one PHY does not necessarily mean an independent radio frequency (RF) device.
- RF radio frequency
- one independent RF device means one PHY, but is not limited thereto, and one RF device may include several PHYs.
- 24 illustrates a concept in which a plurality of MACs manages multicarriers in a base station.
- 25 illustrates a concept in which a plurality of MACs manage a multicarrier in a terminal.
- 26 illustrates another concept in which a plurality of MACs manages multicarriers in a base station.
- 27 illustrates another concept in which a plurality of MACs manage a multicarrier in a terminal.
- multiple carriers may control several carriers instead of one MAC.
- each carrier may be controlled by one MAC, and as shown in FIGS. 26 and 27, each carrier is controlled by one MAC and one by one for some carriers.
- One or more carriers can be controlled by one MAC.
- the above system is a system including a plurality of carriers from 1 to N, and each carrier may be used adjacent or non-contiguous. This can be applied to the uplink / downlink without distinction.
- the TDD system is configured to operate N multiple carriers including downlink and uplink transmission in each carrier, and the FDD system is configured to use multiple carriers for uplink and downlink, respectively.
- asymmetrical carrier aggregation may be supported in which the number of carriers and / or the bandwidths of carriers merged in uplink and downlink are different.
- the PDSCH is assumed to be transmitted on the downlink component carrier # 0, but cross-carrier scheduling is applied. It is apparent that the corresponding PDSCH can be transmitted through another downlink component carrier.
- component carrier may be replaced with other equivalent terms (eg, cell).
- FIG. 28 illustrates a scenario in which uplink control information (UCI) is transmitted in a wireless communication system supporting carrier aggregation.
- UCI uplink control information
- this example assumes that UCI is ACK / NACK (A / N).
- the UCI may include control information such as channel state information (eg, CQI, PMI, RI) and scheduling request information (eg, SR) without limitation.
- the illustrated asymmetric carrier merging may be set in terms of UCI transmission. That is, the DL CC-UL CC linkage for UCI and the DL CC-UL CC linkage for data may be set differently. For convenience, assuming that one DL CC can transmit at most two codewords, the UL ACK / NACK bit also needs at least 2 bits. In this case, to transmit ACK / NACK for data received through five DL CCs through one UL CC At least 10 bits of ACK / NACK bits are required.
- the carrier aggregation is illustrated as an increase in the amount of UCI information, but this situation may occur due to an increase in the number of antennas, the presence of a backhaul subframe in a TDD system, a relay system, and the like. Similar to ACK / NACK, even when transmitting control information associated with a plurality of DL CCs through one UL CC, the amount of control information to be transmitted is increased.
- DLCC and ULCC may also be referred to as DLCell and UL Cell, respectively.
- anchor DL CC and the anchor UL CC may be referred to as DL PCell (UL) and UL PCell, respectively.
- the DL primary CC may be defined as a DL CC linked with an UL primary CC.
- Linkage here encompasses both implicit and explicit linkage.
- one DL CC and one UL CC are uniquely paired.
- a DLCC linked with a UL primary CC may be referred to as a DL primary CC.
- Explicit linkage means that the network configures the linkage in advance () 11 1 ⁇ 1011) and can be signaled through RRC.
- a DL CC paired with a UL primary CC may be referred to as a primary DL CC.
- the UL primary (or anchor) CC may be a UL CC transmitted by PUCCINI ".
- the UL primary CC may be a UL CC through which UCI is transmitted through PUCCH or PUSCH.
- the DL primary CC may be a higher layer.
- the DL primary CC may be a DL CC to which the UE performs initial access, and the DL CC except for the DL primary CC may be referred to as a DL secondary CC.
- the UL CC except for the UL primary CC may be referred to as a UL secondary CC.
- the DL-UL pairing may correspond to FDD only. TDD uses the same frequency DL-UL pairing may not be defined separately.
- the DL-UL linkage may be determined from the UL linkage through the UL EARFCN information of SIB2. For example, the DL—UL linkage may be obtained through SIB2 decoding at initial connection and otherwise via RC signaling. Thus, only SIB2 linkage exists and other DL-UL pairing may not be explicitly defined.
- DL CC # 0 and UL CC # 0 have a SIB2 linkage relationship with each other, and the remaining DL CCs may have a SIB2 linkage relationship with other UL CCs not configured for the UE. Can be.
- the PUCCH format proposed by the present invention is referred to as PUCCH format 3 in view of the definition of a new PUCCH format, an LTE-A PUCCH format, or PUCCH format 2 in existing LTE.
- the technical idea of the PUCCH format proposed by the present invention can be easily applied to any physical channel (eg, PUSCH) capable of transmitting uplink control information using the same or similar scheme.
- PUSCH physical channel
- an embodiment of the present invention may be applied to a periodic PUSCH structure for periodically transmitting control information or an aperiodic PUSCH structure for aperiodically transmitting control information.
- the following figures and embodiments are subframe / slot level UCI / RS symbol structures applied to a PUCCH format according to an embodiment of the present invention when using the UCI / RS symbol structure of PUCCH format 1 (standard CP) of the existing LTE.
- the subframe / slot level UCI / RS symbol structure is defined for convenience of illustration and the present invention is not limited to a specific structure.
- UCI / RS in the format .
- the number, position, etc. of the symbols can be freely modified according to the system design.
- the PUCCH format according to the embodiment of the present invention may be defined using the structure of the PUCCH format 2 / 2a / 2b of the existing LTE.
- the PUCCH format according to an embodiment of the present invention can be used to transmit any type / size of uplink control information.
- the PUCCH format according to an embodiment of the present invention may transmit information such as HARQ ACK / NACK, CQI, PMI, RI, and the like, and the information may have a payload of any size.
- the drawings and the embodiment will be described based on the case where the PUCCH format according to the present invention transmits ACK / NACK information.
- FIG. 29 to 30 illustrate examples of applying a spreading factor (SF) reduction to slot 0 in a subframe.
- FIG. 29 is a case of standard CP and
- FIG. 30 is a case of extended CP.
- This example shows a case where the SF value of 0C used in the PUCCH format of the existing LTE is reduced from 4 to 2.
- the basic signal processing is the same as described with reference to FIGS. 13 to 14.
- 29 to 30 information bits (eg, ACK / NACK) are converted into modulation symbols through modulation (eg, QPSK, 8PSK, 16QAM, 64QAM, etc.) (symbols 0, 1).
- ro includes a base sequence of length 12.
- 0C includes the Dash Code or 3/4 sheath cover defined in LTE.
- [w0 wl] and [w2 w3] may be given independently of each other or may have the same value.
- UCI eg ACK / NACK
- the SF reduction is (1) only up to 8 bits can be transmitted in QPSK modulation, and (2) half the energy per UCI since UCI, which originally occupied four SC-FDMA symbols, occupies only two SOFDMA symbols. 3dB of signal to noise ratio (SNR) loss occurs.
- SNR signal to noise ratio
- MSM Multi-Sequence Modulation
- N 2 and two PUCCH resources exist in the same .PRB for ease of description.
- two orthogonal resources may use the same PRB index, the same 0C index, and different cyclic shifts. That is, the MSM can be used using only the cyclic shift differently, and the cyclic shift can be an adjacent value or a value separated by 4 TM.
- FIG. 31 illustrates a PUCCH format using MSM and SF reduction and a signal processing procedure therefor.
- the channel coding block illustrated in FIG. 31 may be omitted for convenience of description.
- Basic signal processing except channel selection is the same as described with reference to FIGS. 29-30.
- CS hopping is applied at the SC-FDMA or slot level
- the cyclic shift M may have a different value depending on the SC— FDMA symbol or slot.
- Orthogonal code (wa, b) shown (e.g., [w0, l; wl, l], [w2, l; w3, l] or [w0, l; wl, l; w2, l; w3, l])
- a represents an element index in an orthogonal code
- b represents an orthogonal code index.
- channel coding is performed for UCI (eg, ACK / NACK).
- channel coding includes joint coding for multiple ACK / NACKs for data received from multiple DL CCs, from which a single coded bit string (or codeword) is obtained.
- Channel coding schemes include, for example, RM 'based coding, TBCC, or turbo coding.
- the coding bits (ie codewords) are then rate matched.
- Rate-matching schemes include circular buffer rate matching.
- Rate matching also includes puncturing leaving only the desired coding bit size from the codeword. For example, assume that RM coding (20, A) used for LTE PUCCH is used. In this example, 16 coding bits are required when using QPSK modulation. In this case, after generating a coding bit of length 20 from the LTERM (20, A), it is possible to puncture the next four bits.
- an RM supports a size of (14, A)
- we can create a coded bitstream of length 14 and perform circular buffer matching to length 16 ([a0, al ( -, al5, a0, al] > Length 16)
- 8PSK modulation is used, a total of 24 coding bits are required, in which case the information bits are coded 20 bits using LTERM (20, A) and cyclic buffer rate matching is performed to 24 bits.
- the coding bits are modulated to be mapped to a physical channel In this example, the modulator performs QPSK or 8PSK modulation to generate a total of eight modulation symbols.
- the UCI is transmitted as follows.
- an antenna may mean a physical antenna, a logical antenna, or a layer.
- the multi-antenna transmission method described below may be adaptive at ion with a single antenna port mode according to channel conditions or network scheduling.
- the single antenna port mode is not only physically transmitted to one antenna but also virtualized such as cyclic delay diversity (CDD), precoding vector switching (PVS), time switched transmit diversity (TSTD), and the like. It includes all methods that enable the decoding as if the receiving end received a signal from one transmitting antenna.
- a transmission diversity scheme in which an Alamouti code is applied to an orthogonal resource domain and an antenna domain in a first manner will be described.
- the number of transmitting antennas is two.
- Two of the RS orthogonal resources may be used for channel estimation for each antenna.
- the first orthogonal resources of the RS symbols are transmitted by the first antenna may be a second orthogonal resource of RS symbols transmitted to the second antenna.
- the slot 0 will be described for convenience, but it is obvious that the same may be applied to the slot 1.
- FIG. 32 and 33 illustrate transmission of control information to antenna 0 and antenna 1 using the first scheme of the present invention, respectively.
- modulation symbols transmitted through antenna 0 are transmitted in the same manner as in case of ⁇ .
- precoding transmission 1, Alamouti coding
- a modulation symbol transmitted through antenna 1 in an orthogonal resource domain eg, a code domain including a cyclic shift domain and an orthogonal code domain.
- the space—code domain precoding according to this scheme is It may be referred to as Space Code Block Coding (SCBC).
- SCBC Space Code Block Coding
- Alamouti coding includes not only the matrix of Equation 11, but all unitary transform forms thereof.
- (.r means complex conjugate operation of (.).
- transmission may be performed in slot 0 of each antenna as follows.
- Antenna 0 Antenna 0
- precoding eg, Alamouti code
- a time (ie, SC-FDMA symbol) domain and an antenna domain in a second scheme will be described.
- the number of transmitting antennas is two.
- Two of the RS orthogonal resources may be used for channel estimation for each antenna.
- a first orthogonal resource of the RS symbol may be transmitted to the first antenna and a second orthogonal resource of the RS symbol may be transmitted to the second antenna.
- slot 0 will be described for convenience, but it is obvious that the same may be applied to the slot 1.
- Alamouti coding is applied in the time domain to the modulation symbol transmitted through antenna 1. That is, Alamouti coding is applied between the same orthogonal resources in units of SC-FDMA symbols to which 0C is applied.
- Alamouti coding includes not only the matrix of Equation 13, but all unitary transformation forms thereof.
- the following transmission may be performed in slot 0 of each antenna.
- a transmission diversity or spatial multiplexing scheme in which a modulation symbol is transmitted through different orthogonal resources in each antenna in the third transmission diversity scheme will be described. That is, two orthogonal resources, which are complementary to the number of antennas, may be allocated, and the same information may be transmitted in the same format through the respective resources. In this case, after joint coding is performed in consideration of the extended symbol space, spatial multiplexing can be achieved by transmitting different modulation symbols through respective orthogonal resources.
- a resource allocated for 2 antennas may be defined as an offset value of a resource used by the first antenna, and the offset value may be 1.
- the smallest CCE index may be used for the first antenna, and then the CCE index may be used for the second antenna.
- transmission may be performed in slot 0 of each antenna as follows.
- Antenna 1 Transmit modulation symbol sO through SOFDMA symbols 0 through 1 in slot 0 through 0S0 ⁇ 1
- Modulation symbol si is transmitted via SC-FDMA symbols 0-1 in slot 0
- antennas s0 to s3 and antennas transmitted from antenna 0 are applied.
- 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 described mainly based on a signal transmission / reception relationship between a terminal and a base station.
- This transmission / reception relationship is extended / similarly to signal transmission / reception between the terminal and the relay or the base station and the relay.
- Certain operations described in this document as being performed by a base station may, in some cases, be performed by an upper node thereof. That is, it is apparent that various operations performed for communication with a 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, and the like.
- an embodiment of the present invention may be implemented by various means, for example, hardware firmware, software or a combination thereof.
- an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( field prog ect able gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field prog ect able gate arrays
- an embodiment of the present invention may be implemented in the form of modules, procedures, functions, etc. that perform the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
- the present invention can be used in a terminal, base station, or other equipment of a wireless mobile communication system. Specifically, the present invention can be applied to a method for transmitting uplink control information and an apparatus therefor.
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Abstract
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CN201180020345.8A CN102859958B (zh) | 2010-04-21 | 2011-04-21 | 在无线通信***中发射控制信息的方法和设备 |
US13/642,848 US9025560B2 (en) | 2010-04-21 | 2011-04-21 | Method and device for transmitting control information in a wireless communication system |
EP11772251.2A EP2562981A4 (en) | 2010-04-21 | 2011-04-21 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM |
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US32662810P | 2010-04-21 | 2010-04-21 | |
US61/326,628 | 2010-04-21 | ||
KR1020100129071A KR101783610B1 (ko) | 2010-04-21 | 2010-12-16 | 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치 |
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ES2653812T3 (es) | 2007-08-13 | 2018-02-08 | Optis Wireless Technology, Llc | Dispositivo de comunicación por radio y método de propagación de la señal de respuesta |
JP5895388B2 (ja) * | 2011-07-22 | 2016-03-30 | シャープ株式会社 | 端末装置、基地局装置、集積回路および通信方法 |
USRE49468E1 (en) * | 2012-10-24 | 2023-03-21 | Samsung Electronics Co., Ltd | Method and apparatus for transmitting and receiving common channel information in wireless communication system |
WO2016127309A1 (en) * | 2015-02-10 | 2016-08-18 | Qualcomm Incorporated | Dmrs enhancement for higher order mu-mimo |
ES2832589T3 (es) | 2015-12-31 | 2021-06-10 | Nec Corp | Métodos y aparatos para transmitir y recibir información de enlace ascendente |
WO2018027831A1 (zh) * | 2016-08-11 | 2018-02-15 | 华为技术有限公司 | 一种信息处理方法及设备 |
KR20190141006A (ko) * | 2017-05-03 | 2019-12-20 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말과 기지국의 신호 송수신 방법 및 이를 지원하는 장치 |
CN109818895B (zh) * | 2017-11-17 | 2022-04-29 | 中兴通讯股份有限公司 | 确定序列组的方法及装置,确定循环移位的方法及装置 |
CN112865942B (zh) * | 2017-12-11 | 2023-05-05 | 中兴通讯股份有限公司 | 参考信号的传输方法及装置 |
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US8730877B2 (en) * | 2005-06-16 | 2014-05-20 | Qualcomm Incorporated | Pilot and data transmission in a quasi-orthogonal single-carrier frequency division multiple access system |
US8374161B2 (en) | 2006-07-07 | 2013-02-12 | Qualcomm Incorporated | Method and apparatus for sending data and control information in a wireless communication system |
US8369299B2 (en) * | 2007-05-07 | 2013-02-05 | Qualcomm Incorporated | Method and apparatus for multiplexing CDM pilot and FDM data |
US8503375B2 (en) * | 2007-08-13 | 2013-08-06 | Qualcomm Incorporated | Coding and multiplexing of control information in a wireless communication system |
US8059524B2 (en) * | 2008-01-04 | 2011-11-15 | Texas Instruments Incorporated | Allocation and logical to physical mapping of scheduling request indicator channel in wireless networks |
US8774156B2 (en) * | 2008-01-29 | 2014-07-08 | Texas Instruments Incorporated | ACKNAK and CQI channel mapping schemes in wireless networks |
KR101597573B1 (ko) * | 2008-08-11 | 2016-02-25 | 엘지전자 주식회사 | 제어정보의 상향링크 전송 방법 |
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CN102859958A (zh) | 2013-01-02 |
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