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WO2011162482A2 - Procédé et appareil permettant de transmettre des informations de commande dans un système de communication sans fil - Google Patents

Procédé et appareil permettant de transmettre des informations de commande dans un système de communication sans fil Download PDF

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Publication number
WO2011162482A2
WO2011162482A2 PCT/KR2011/003343 KR2011003343W WO2011162482A2 WO 2011162482 A2 WO2011162482 A2 WO 2011162482A2 KR 2011003343 W KR2011003343 W KR 2011003343W WO 2011162482 A2 WO2011162482 A2 WO 2011162482A2
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WIPO (PCT)
Prior art keywords
control information
pucch format
pucch
ack
format
Prior art date
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Ceased
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PCT/KR2011/003343
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English (en)
Korean (ko)
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WO2011162482A3 (fr
Inventor
한승희
정재훈
이현우
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LG Electronics Inc
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LG Electronics Inc
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Priority claimed from KR1020110002268A external-priority patent/KR101761618B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority to US13/806,584 priority Critical patent/US9247534B2/en
Publication of WO2011162482A2 publication Critical patent/WO2011162482A2/fr
Publication of WO2011162482A3 publication Critical patent/WO2011162482A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W99/00—Subject matter not provided for in other groups of this subclass
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

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: generating the control information; Selecting a specific PUCCH format from the plurality of PUCCH formats; And transmitting the control information through the specific PUCCH format.
  • 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 is configured to generate the control information, select a specific PUCCH format from a plurality of PUCCH formats, and transmit the control information through the specific PUCCH format.
  • PUCCH physical uplink control channel
  • RF radio frequency
  • the specific PUCCH format may be indicated by higher layer signaling.
  • the specific PUCCH format may be selected based on the number of component carriers configured for the terminal.
  • the specific PUCCH format may be selected based on the number of bits of the control information.
  • control information includes two or more kinds of control information
  • specific PUCCH format may be selected based on a combination of control information constituting the control information.
  • 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 through 16 illustrate the slot level structure of the PUCCH format 2 / 2a / 2b.
  • 17 illustrates ACK / NACK channelization for PUCCH formats la and lb.
  • FIG. 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.
  • FIG. 24 illustrates the concept of one MAC managing a multicarrier at 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.
  • FIG. 28 illustrates asymmetric carrier merging with a plurality of DL CCs and one UL CC linked.
  • 29 through 31 illustrate a CA PUCCH format according to an embodiment of the present invention.
  • 32-33 illustrate QPSK constellation mapping according to one embodiment of the invention.
  • SCBC Space Code Block Coding
  • Figure 35 illustrates a base station and a terminal that can be applied to the present invention.
  • CDMA code division mult iple access
  • FDMA frequency division multiple access
  • TDMA time division mult iple access
  • OFDMA orthogonal frequency division mult iple access
  • SC single carrier frequency division mult FDMA iple 100 access
  • CDMA may be implemented by 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) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • 0FDMA can be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), 105 IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).
  • UTRA is part of the UMTS Universal Mobile Telecommunications System.
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA
  • LTE-A Advanced
  • a terminal receives information through a downlink (DL) from a base station, and the terminal transmits the information through an uplink (UL) to a base station.
  • the information transmitted and received between the base station and the terminal includes data and various control information, and there are various physical channels according to the type / use of the information transmitted and received.
  • 115 is a view for explaining physical channels used in the 3GPP LTE system and a general signal transmission method using the same.
  • step S101 When the power is turned off again or the new terminal enters the cell in step S101, an initial cell search operation such as synchronizing with the base station is performed in step S101.
  • the terminal is a primary synchronization channel (Primary)
  • In-cell broadcast information may be obtained by receiving a physical broadcast channel from a base station. Meanwhile, the terminal receives a downlink reference signal (DL RS) in an initial cell discovery step to receive a downlink channel.
  • DL RS downlink reference signal
  • the UE After completing the initial cell discovery, 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 to provide more specific information.
  • System information can be obtained.
  • step S103 After 130, the terminal to step S103 to step to complete the connection to the base station
  • Random access procedure such as S106 may be performed.
  • the UE transmits a preamble through a physical random access channel (PRACH) (S103), and a response to the preamble through a physical downlink control channel and a physical downlink shared channel thereto.
  • PRACH physical random access channel
  • S104 In case of contention-based random access, additional physical random access channel transmission (S105) And a contention resolution procedure such as receiving a physical downlink control channel and a corresponding physical downlink shared channel (S106).
  • the terminal After performing the procedure as described above, the terminal receives the physical downlink control channel / physical downlink shared channel as a general uplink / downlink signal transmission procedure (S107) and
  • UCI Uplink Control information
  • HARQ ACK / NACK Hybrid Automatic Repeat and reQuest Acknowledgement / Negat i ve-ACK
  • UCI is generally transmitted through a PUCCH, but may be transmitted through a PUSCH when control information and traffic data are to be transmitted at the same time. In addition, the UCI may be aperiodically transmitted through the PUSCH according to a network request / instruction. .
  • 150 is a view for explaining 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.
  • 155 is modulated into a complex symbol using Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPS), or 16QAM / 64QAM (Quadrature Amplitude Modulation).
  • BPSK Binary Phase Shift Keying
  • QPS Quadrature Phase Shift Keying
  • 16QAM / 64QAM Quadadrature Amplitude Modulation
  • the modulated complex symbol is processed by the transform precoder 230 and then input to the resource element mapper 240, which can map the complex symbol to a time-frequency resource element.
  • the signal thus processed is an SC-FDMA signal
  • the 160 may be transmitted to the base station via the antenna 250.
  • 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 are each scrambled as in the uplink of FIG.
  • 165 modules 301 and modulation mapper 302 may be processed into complex symbols, after which complex symbols are mapped to a plurality of layers by layer mapper 303, each layer being a precoding mode. It may be multiplied by the precoding matrix by 304 and assigned to each transmit antenna. The transmission signals for each antenna processed as described above are mapped to time-frequency resource elements by the resource element mapper 305, respectively, and then 0FDM (0rthogonal Frequency Division).
  • 170 may be transmitted through each antenna via the signal generator 306.
  • a Peak-to-Average Ratio (PAPR) is more problematic than in a case in which a base station transmits a signal in downlink.
  • PAPR Peak-to-Average Ratio
  • uplink signal transmission is different from the 0FDMA scheme used for downlink signal transmission.
  • the 3GPP system employs 0FDMA in downlink and SC-FDMA in uplink.
  • both a terminal for uplink signal transmission and a base station for downlink signal transmission are serial-to-parallel converters 401 and subcarriers.
  • 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 transmitted signal has a single carrier property.
  • FIG. 5 illustrates a signal mapping scheme in the frequency domain to satisfy 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 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 clusters
  • FIG. 195 shows a signal processing procedure in which DFT process output samples are mapped to multi-carriers in SC-FDMA.
  • 6 illustrates an example of applying intra-carrier cluster SC-FDMA
  • FIGS. 7 and 8 correspond to an example of applying inter-carrier cluster SC-FDMA.
  • FIG. 7 illustrates a case where adjacent component carriers are allocated 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.
  • FIG. 9 is a diagram illustrating a signal processing procedure of segmented SOFDMA.
  • the DFT and the IFFT has a one-to-one relationship, it is simply an extension of the conventional SC-FDMA DFT spreading and the IFFT frequency subcarrier mapping.
  • This specification collectively names them Segment SC-FDMA. Referring to FIG. 9, the segment SC-FDMA has a single carrier characteristic.
  • N is an integer greater than 1
  • DFT process is performed in group units.
  • FIG. 10 illustrates a structure of an uplink subframe.
  • an uplink subframe includes a plurality of (eg, two) slots.
  • the slot may include different numbers of SC-FDMA symbols according to CP Cyclic Prefix) length.
  • a slot may include 7 SC-FDMA symbols.
  • the uplink subframe is divided into a data region and a control region. data
  • the 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) includes HARQ ACK / NACK, CQK Channel Quality Information (PMQPrecoding Matrix Indicator), RI (Rank Indication), and the like.
  • 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 IFFTCS13 process, and a cyclic prefix (CP) attach process (S14).
  • S12 localization mapping process
  • CP cyclic prefix
  • RS sequence is defined by a cyclic shift (cyclic shift) a of the base sequence (base sequence) can be expressed as shown in Equation 1.
  • sc ⁇ sc is the length of the RS sequence and N is the subcarrier unit.
  • the size of the resource block indicated, m is 1 ⁇ M ⁇ RB ⁇ ⁇ RB represents the maximum uplink transmission band.
  • the definition of the basic sequence ⁇ "' '" ''' vV Jsc 1) depends on the sequence length s C.
  • 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.
  • c () corresponds to a pseudo-random sequence, and pseudo-random
  • the sequence generator can be initialized to at the beginning of each radio frame.
  • sequence shift pattern " ⁇ ss is different from each other between PUCCH and PUSCH.
  • the sequence shift pattern / ss is / ss ⁇ VlD moaJU
  • the sequence shift pattern / ss / sc ⁇ uccH + Ajmcx o A ss ⁇ ⁇ , 1, .-., 29 ⁇ is constructed by higher layers.
  • Sequence hopping is only applied for reference signals of length M.
  • Equation 8 For a reference signal of length ⁇ SC ⁇ 6Ar sc, the basic sequence number within the basic sequence group in slot ⁇ is given by Equation 8 below.
  • ⁇ corresponds to a pseudo-random sequence
  • a parameter enabling sequence hopping provided by a higher layer determines whether sequence hopping is enabled.
  • Pseudo-Random Sequence Generator is a Can be initialized to
  • the reference signal for the PUSCH is determined as follows.
  • a broadcasted value, DMRS is given by the uplink scheduling allocation, given as according to "PRsOs) is a cell-specific cyclic shift value.”
  • PRsC “S) is the slot number.
  • the generator can be initialized to at the start of the radio frame.
  • Table 3 lists the cyclic shift fields in Downlink Control Information (DCI) format 0.
  • DCI Downlink Control Information
  • the physical mapping method for the uplink RS in the PUSCH is as follows.
  • a sequence consists of an amplitude scaling factor ⁇ PUSCH and PUSCH ⁇
  • the cyclic prefix extension Mapping to the resource element, Z) in subframe 320 will first be ordered by and then in order of slot number.
  • the ZC sequence is used with circular expansion, and if the length is less than sc, the computer generated sequence is used.
  • the cyclic shift is determined according to cell-specific cyclic shift, terminal-specific cyclic shift and hopping pattern.
  • 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.
  • DMRS is transmitted through 4th and 11th SC—FDMA symbols
  • DMRS is transmitted through 330 3rd and 9th 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 cyclic shift (CS) (frequency domain code) and an orthogonal cover code (orthogonal cover code) of a CG-CAZAC (Computer-Generated Constant Amplitude Zero Auto Correlation) sequence. This is transmitted through different resources consisting of OC or OCC (Time Domain Spreading Codes).
  • CS cyclic shift
  • OCC Time Domain Spreading Codes
  • Orthogonal Sequences w0, wl, w2, w3 are random (after FFT modulation) It can be applied in the time domain or in any frequency domain (prior to FFT modulation).
  • ACK / NACK resources composed of CS, 0C, and PRB (Physical Resource Block) may be given to the UE through RRCXRadio Resource Control.
  • ACK / NACK resources can be given to implicitly (implicitly) terminal by using the smallest (lowest) CCE index of PDCCH to Hung for 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 the 370 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 the corresponding SC-FDMA symbol. Is mapped to. SC-FDMA symbol level CS hopping can be applied to randomize inter-sal 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 375 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
  • Orthogonal sequences (0C) of length -4 and length -3 for PUCCH format 1 / la / lb are shown in Tables 7 and 8 below.
  • FIG. 17 is a diagram illustrating ACK / NACK channelization for PUCCH formats la and lb. 17 is Corresponds to the case of ⁇ A.
  • Cyclic Shift (CS) hopping and Orthogonal Cover (0C) remapping can be applied as follows.
  • CQI, PMI, RI, and, CQI and ACK / NACK may be delivered via 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.
  • Bit stream 0 1 is channel coded using a (20, A) RM code.
  • Table 10 shows a basic sequence for the (20, A) code. ⁇ and an represent the Most Significant Bit (MSB) and the Least Significant Bit (LSB). In the case of the extended 410 CP, the maximum information bit is 11 bits except when the CQI and the ACK / NACK are simultaneously transmitted.
  • MSB Most Significant Bit
  • LSB Least Significant Bit
  • the maximum information bit is 11 bits except when the CQI and the ACK / NACK are simultaneously transmitted.
  • 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 broadband, which reports closed loop spatial multiplexing PDSCH transmissions.
  • Table 13 19 illustrates PRB allocation. As shown in FIG. 19, the PRB may be used for 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
  • LTE-A LTE-Advanced
  • LTE-A LTE-Advanced
  • a new bandwidth can be defined to support carrier aggregation regardless of the bandwidth used by the existing system.
  • 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 . do.
  • FIG. 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 is one 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.
  • FIG. 24 illustrates a concept in which a plurality of MACs manages multicarriers in a base station.
  • FIG. 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 multiple carriers instead of one MAC.
  • Each carrier may be controlled 1: 1 by each MAC as shown in FIGS. 24 and 25. As shown in FIGS. 26 and 27, each carrier is controlled 1: 1 by each MAC for some carriers. One MAC may control the remaining one or more carriers.
  • 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.
  • 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 corresponding PDSCH is transmitted on the downlink component carrier # 0.
  • component carrier may be replaced with another equivalent term (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
  • UCI is ACK / NACK (A / N).
  • 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.
  • UCI User Datagram
  • the DL CC-UL CC linkage for 490 and the DL CC-UL CC linkage for data may be set differently.
  • the UL ACK / NAC bit also needs at least 2 bits. In this case, at least 10 bits of ACK / NACK bits are required to transmit ACK / NACK for data received through five DL CCs through one UL CC. If the DTX status by DL CC
  • the carrier aggregation is illustrated as an increase in the amount of UCI information. However, this situation may occur due to an increase in the number of antennas, the presence of a backhaul subframe in a TDD system, and a relay system.
  • 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 PCelKPrimary Cell) and UL PCell, respectively.
  • the 505 DL primary CC may be defined as a DL CC linked with an UL primary CC.
  • Linkage here encompasses both implicit and explicit linkages.
  • one DL CC and one UL CC are uniquely paired.
  • a DL CC linked with an UL primary CC may be referred to as a DL primary CC by LTE pairing. You can think of this as an implicit linkage.
  • the 510 network configures the linkage in advance ((11 81 « " 1011) and may be signaled by RRC, etc.)
  • the DL CC paired with the UL primary CC is called the primary DL CC.
  • the UL primary (or anchor) CC may be a UL CC through which PUCCH is transmitted, or the UL primary CC may be a UL CC through which UCI is transmitted through PUCCH or PUSCH, or DL primary.
  • the DL primary CC may be a DL CC to which the UE performs initial access.
  • a 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.
  • DL-UL pairing may correspond to FDD only.
  • TDD uses the same frequency
  • DL—UL linkage may be determined from UL linkage through UL EARFCN information of SIB2.
  • the DL-UL linkage may be obtained through SIB2 decoding at initial connection and otherwise obtained through RRC signaling.
  • SIB2 linkage exists and other DL-UL pairing may not be explicitly defined.
  • 5DL: 1UL structure of FIG. 28 DL
  • the 525 CC # 0 and the UL CC # 0 are in a SIB2 linkage relationship with each other, and the remaining DL CCs may be in a SIB2 linkage relationship with other UL CCs which are not configured in the corresponding UE.
  • the PUCCH format proposed in 3GPP so far to transmit increased UCI is largely as follows.
  • the following PUCCH format is used for CA Carrier Aggregation) PUCCH.
  • the CA PUCCH format is defined for convenience of description, and does not mean that the PUCCH format below is limited to a CA situation.
  • the CA PUCCH format described herein includes, without limitation, the PUCCH format used to transmit the increased UCI when the information amount of UCI is increased due to relay communication or TDD.
  • a specific resource is selected from a plurality of resources defined for RS + UCI, and a UCI modulation value is transmitted through the selected resource.
  • Table 14 exemplifies a mapping table in the case of transmitting 3-bit ACK / NACK using channel selection. Modulation used QPSK.
  • Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission. Denotes a QPSK modulation value.
  • Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission.
  • 550 1, -1 represents a BPSK modulation value.
  • FIG. 29 illustrates a PUCCH format for transmitting UCI using SF reduction and a signal processing procedure therefor.
  • the basic process is the same as described with reference to FIGS.
  • more modulation symbols symbol 0,1 can be transmitted by reducing the SF 555 value used in the LTE PUCCH format 1 / la / lb structure from 4 to 2.
  • the number, location, etc. of the UCI / RS symbols illustrated in the drawings may be freely modified according to the system design.
  • Chi and Ch2 represent PUCCH resources occupied for ACK / NACK transmission.
  • 1, -1J, -j represents a QPSK modulation value.
  • LTE PUCCH format 2 supports up to 11 bits to 13 bits of information bits. 6. DFT-s-OFDMA Using Time Domain CDM
  • FIG. 30 illustrates a PUCCH format for transmitting UCI using DFT-s-OFDMA and time domain CDM and a signal processing procedure therefor.
  • the number, location, etc. of the UCI / RS symbols illustrated in the drawings may be freely modified according to the system design.
  • a channel coding block may channel-code information bits a_0, a_l, ..., a_M-l (e.g., multiple ACK / NACK bits) to encode an encoded bit,
  • the information bit includes uplink control information (UCI), for example, multiple ACK / NACKs for a plurality of data (or PDSCHs) received through a plurality of DL CCs.
  • UCI uplink control information
  • the information bits a_0, a_l, and a_M-l are joints regardless of the type / number / size of the UCI constituting the information bits.
  • Channel coding includes, but is not limited to, simple repetition, simple coding, Reed Muller coding, punctured RM coding, TBCCCT-biting convolutional coding,
  • LDPC low-density parity-check
  • turbo-coding turbo-coding
  • coding bits may be rate-matched in consideration of modulation order and resource amount.
  • the rate matching function may be included as part of the channel coding block or may be performed through a separate function block. For 'example, the channel coding block to obtain a single code word by performing a (32,0) RM code for a plurality of control information, the buffer for this cycle
  • a modulator modulates the coding bits b_0, b_l, '', b_N_l to generate modulation symbols c_0, c_l and c_L-1.
  • L represents the size of the modulation symbol.
  • Modulation methods include, for example, n-PSK (Phase Shift Keying) and n-QAM (Quadrature Amplitude Modulat ion) (n is an integer of 2 or more).
  • the modulation method is BPSK (Binary PSK)
  • a divider divides modulation symbols c_0, c_l, ..., c_L-l into each slot.
  • the order / pattern / method for dividing the modulation symbols into each slot is not particularly limited.
  • the divider may divide a modulation symbol into each slot in order from the front. In this case, as shown, modulation symbols c_0, c_l, ..., c_L / 2-l are assigned to slot 0.
  • modulation symbols c— 172, c_L / 2 + l, ..., c_L-1 may be divided into slot 1.
  • the modulation symbols can be interleaved (or permutated) upon dispensing into each slot. For example, an even numbered modulation symbol may be divided into slot 0 and an odd numbered modulation symbol may be divided into slot 1. The modulation process and the dispensing process can be reversed.
  • the DFT precoder generates a single carrier waveform
  • DFT precoding for modulation symbols divided into each slot to generate 605 (e.g.,
  • modulation symbols c_0, c_l,... CJ72-1 denotes DFT symbols d_0, d_l,...
  • the modulation symbols c—L / 2, c_L / 2 + 1, ..., and c_L-l are DFT precoded with d_L / 2-1 and divided into slot 1, and d_L / 2, d_L / 2 + 1, ... DFT precoded with d_L-1.
  • DFT precoding is another linear operation
  • a spreading block spreads the signal on which the DFT is performed at the SOFDMA symbol level (time domain).
  • Time-domain spreading at the SC-FDMA symbol level is performed using a spreading code (sequence).
  • the spreading code includes a quasi-orthogonal code and an orthogonal code.
  • Quasi-orthogonal codes include, but are not limited to, pseudo noise (PN) codes.
  • Orthogonal codes include, but are not limited to, Walsh codes, DFT codes.
  • the orthogonal code is mainly described as a representative example of the spreading code.
  • the orthogonal code may be replaced with a quasi-orthogonal code as an example.
  • the maximum value of the spreading code size (or spreading factor (SF)) is limited by the number of SC-FDMA symbols used for control information transmission. For example, in one slot
  • a (quasi) orthogonal code of length 4 (0, ⁇ , 3 ⁇ 4 ⁇ , ⁇ ) may be used for each slot.
  • SF denotes a spreading degree of control information and may be related to a multiplexing order or antenna multiplexing order of a terminal. have. SF is 1, 2, 3, 4,... It may vary according to the requirements of the system, such as predefined between the base station and the terminal, or DCI black to the terminal through the RRC signaling
  • the signal generated through the above process is mapped to a subcarrier in the PRB and then converted into a time domain signal through an IFFT.
  • CP is added to the time domain signal
  • the 630 SC-FDMA symbol is transmitted through the RF stage.
  • the signal processing described with reference to FIG. 30 is an example, and the signal mapped to the PRB in FIG. 30 may be obtained through various equivalent signal processing.
  • the processing order of the DFT precoder and the spreading block may be changed, and the divider and the spreading block may be implemented as one functional block.
  • the MSM represents a method of performing modulation (eg, QPSK, 8PSK, M-ary QAM, etc.) for each resource by receiving N PUCCH resources.
  • modulation eg, QPSK, 8PSK, M-ary QAM, etc.
  • the total number of 640 modulation symbols is 10, and a total of 20 QPSK modulation symbols may be mapped to two antennas (ports).
  • a symbol space can be extended using two orthogonal PUCCH resources, thereby transmitting 645 UCI.
  • two PUCCH resources may exist in the same PRB.
  • two orthogonal resources may use the same PRB index, the same 0C index, and may use different cyclic shifts. In other words, MSM can be used using only cyclic shift differently.
  • the cyclic shift may be an adjacent value or a value separated by 4 hift .
  • the coding rate is 1 may transmit the "information of up to 40 bits when using the QPSK modulation.
  • the UCI combination may be large as follows.
  • the present invention proposes to change the CA PUCCH format in a corresponding event for multiple UCI transmission.
  • the change of the PUCCH format may be performed by using the number of DL CCs or the number of information bits configured for the corresponding UE as a threshold.
  • the information related to the change of the PUCCH format is UE specific through higher layer signaling (eg, RRC or MAC).
  • the information related to the change of the PUCCH format may be information indicating a set of PUCCH formats that the UE can select, or information indicating a specific PUCCH format to be used (or changed) by the UE.
  • 670 may be applied directly to the shortened PUCCH format.
  • the present invention is not limited to the specific structure.
  • the number, location, etc. of UCI / RS symbols can be freely modified according to the system design.
  • an embodiment of the present invention will be described focusing on (event) when simultaneously transmitting CQI + ACK / NACK.
  • CQI is for each DL CC
  • ACK / NACK includes multiple ACK / NACKs for a plurality of DL COHs.
  • the PUCCH format it may be considered to transmit a plurality of UCIs (eg, CQI + ACK / NACK) through the aforementioned CA PUCCH format at the time when the UCI simultaneous transmission event occurs.
  • a plurality of UCIs eg, CQI + ACK / NACK
  • CQI CQI + ACK / NACK
  • ACK / NACK needs information transmission of up to 10 bits (or 12 bits) based on 5 DL CCs. Therefore, a total of 21 bits of information may be required to achieve simultaneous transmission through joint coding.
  • the following two examples may be considered for the case of CQI + ACK / NACK.
  • joint coding may be performed through PUCCH format 2 using MSM.
  • the information bit stream for each of the CQI and the ACK / NACK may be located in advance.
  • the front side of the Basis sequence is more reliable, relatively more important ACK / NACK information may be disposed, followed by CQI information.
  • PUCCH resources for the MSM format may be indicated or pre-determined / defined through higher layer signaling or DCI.
  • the information bit stream for each 700 may be located in advance in advance. For example, in the case of channel coding based on RM coding, since the front of the basis sequence is more reliable, relatively more important ACK / NACK information may be disposed, followed by CQI information. The same principle applies to other coding techniques. Applicable PUCCH resource for MSM format or DFT-s-OFDMA is higher layer
  • the above example describes a PUCCH format 2 or a DFT-s-OFDMA format using MSM as an example of a modified PUCCH format change, but these may be replaced with any CA PUCCH format capable of transmitting joint coded information.
  • the 715 may drop and perform SR + ACK / NACK transmission.
  • SR + UCI simultaneous transmission may be made when another UCI transmission is also triggered in the subframe in which the SR transmission is triggered.
  • SR + UCI simultaneous transmission is possible by converting other UCI (eg, ACK / NACK) information into SR format.
  • SR + UCI simultaneous transmission is possible by converting other UCI (eg, ACK / NACK) information into SR format.
  • another UCI may be converted into an SR format and transmitted.
  • NAK includes a case where decoding of downlink data fails and a case where DTX (Discontinuous Transmission) occurs.
  • the counter information may indicate the order of the scheduled PDCCH (or PDSCH) or the total number of scheduled PDCCH (or PDSCH).
  • the QPSK modulation value 1 may be carried on the SR resource and transmitted.
  • the number of ACK is 1, 2, 3, 4, 5, 6
  • the QPSK modulation values j,- ⁇ , -jJ,- ⁇ , -j can be carried on SR resources.
  • the SR is indicated by the presence or absence of signal transmission (ie, ON / OFF keying) on the SR resource
  • the ACK / NACK is indicated by the modulation value on the SR resource.
  • the state in which the number of ACKs overlaps with one QPSK modulation value is illustrated twice, but may be designed so as not to overlap.
  • Table 17 shows ACK / NACK bits (6 (0), b (l)) carried in an SR format for SR + ACK / NACK transmission in FIG.
  • the number of ACKs in Table ⁇ 7 also includes the number of ACKs for the conventional PDSCH and the ACK for the Semi Persistent Scheduling (SPS) PDSCH.
  • the PDCCH for PDSCH scheduling may include information on the total number of PDCCHs (or PDSCHs) scheduled for the corresponding UE, and order information (eg, counters) of the scheduled PDCCHs (or PDSCHs).
  • the UE may recognize the DTX when some PDCCHs (or PDSCHs) are lost, and may feed back the number of ACKs to 0 when any one of the DTXs occurs.
  • ACK / NACK for multiple DL CCs is replaced with one representative information through a logical AND (or logical 0R) operation, and the information bundled in the SR resource is modulated and transmitted.
  • the SR + ACK / NACK simultaneous transmission situation may be performed when ACK / NACK transmission is also triggered in the subframe in which SR transmission is triggered.
  • the ACK / NACK information is in SR format.
  • DTX is transmitted. If at least one is ACK, the number of ACKs can be loaded in SR resources. have. Although not limited thereto, the UE may feed back a DTX to the base station by dropping transmission of a specific RS symbol (eg, a second RS symbol) in the PUCCH.
  • NAK is for the downlink data
  • the 755 includes a case where decoding fails and a case where DTX (Discontinuous Transmission) occurs.
  • the DTX generation may be inferred from the counter information included in the PDCCH for downlink scheduling.
  • the counter information may indicate the order of the scheduled PDCCH (or PDSCH) or the total number of scheduled PDCCH (or PDSCH).
  • the QPSK modulation value when the number of ACKs is 1,2,3,4,5,6,7,8, respectively, the QPSK modulation value
  • 760 may be carried on the SR resource and transmitted.
  • a state in which the number of ACKs overlaps with one QPSK modulation value is illustrated twice, but may be designed so as not to overlap.
  • PUCCH format change may be performed based on the number of bits of UCI. in this case,
  • the threshold for the number of UCI bits may be 11 bits.
  • the existing LTE PUCCH format 2 may be used.
  • the PUCCH format 2 using the MSM may be used.
  • PUCCH format 2 using MSM may be replaced with any CA PUCCH format (DFT-s- (DMA PUCCH format).
  • the channel coding process for MSM is TBCC Tail-biting Convolut ional defined in LTE.
  • Resources for the MSM may be pre-specified to the UE through RRC configuration (conf igurat ion) or inferred from resources allocated in PUCCH format 2. For example, two resources are needed for MSM and PUCCH format 2
  • the resource cc // can be used as the first resource for the MSM. Since the resources for the MSM are preferably in the same PRB, the second resource for the MSM is MSM. First resource and circular shift for Only resources can be set differently.
  • the present invention can also be applied in the case of ⁇ _1 , but there are some scheduling restrictions.
  • the offset applied in the positive direction for the first cyclic shift value of the MSM can also be applied in the negative direction.
  • SCBC Space Code Block Coding
  • the total number of QPSK modulation symbols in two slots is 10, and a total of 20 QPSK modulation symbols may be mapped to two antennas (ports).
  • the multi-sequence transmitted through the antenna (port) 0 is transmitted in the same manner as in the case of ⁇ .
  • multi-sequences transmitted through antenna (port) 1 are precoded for transmit diversity in the space-code domain (eg, Alamouti coding).
  • This scheme may be referred to as Space Code Block Coding (SCBC).
  • SCBC Space Code Block Coding
  • the 800 Alamouti coding is not only a matrix of Equation 10, but all of its unitary transformations.
  • a received sequence corresponds to a sequence loaded on orthogonal resource 1 of antenna (port) 0.
  • (s 0 ) * corresponds to a sequence carried in orthogonal resource 1 of antenna (port) 0.
  • the figure illustrates a case in which SCBC is applied in units of subframes, the SCBC according to the present scheme is independently for each smaller time unit (eg, slot unit).
  • UCI is transmitted using two resources for each antenna, and transmit diversity is applied to UCI between antennas.
  • two resources for RS can be used for channel estimation for each antenna (port).
  • the RS transmitted via the 815 antenna uses the second resource. That is, RS may be transmitted using one resource for each antenna.
  • a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120.
  • Base station 110 includes processor 112, memory 114, and radio frequency (Radio).
  • 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.
  • Processor 122 seen 825 may be configured to implement the procedures and / or methods proposed in the 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, to a plurality of network nodes including a 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.
  • the terminal may be replaced with terms such as UE user equipment (MS), mobile station (MS), mobile subscriber station (MSS), and the like.
  • An embodiment according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • one embodiment of the invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • one embodiment of the invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs Pr ogr ammab 1 e logic devices
  • FPGAs field programmable gate arrays
  • processors controllers
  • microcontrollers microprocessors
  • 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 for this.

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Abstract

La présente invention concerne un système de communication sans fil. De manière spécifique, la présente invention concerne un procédé permettant de transmettre des informations de commande par l'intermédiaire d'un PUCCH dans un système de communication sans fil et un appareil associé comprenant les étapes suivantes consistant à : générer les informations de commande ; sélectionner un format PUCCH particulier à partir d'une pluralité de formats PUCCH ; et transmettre les informations de commande par l'intermédiaire du format PUCCH particulier.
PCT/KR2011/003343 2010-06-25 2011-05-04 Procédé et appareil permettant de transmettre des informations de commande dans un système de communication sans fil Ceased WO2011162482A2 (fr)

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US35841910P 2010-06-25 2010-06-25
US61/358,419 2010-06-25
US36187710P 2010-07-06 2010-07-06
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KR1020110002268A KR101761618B1 (ko) 2010-06-25 2011-01-10 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
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US8451915B2 (en) * 2007-03-21 2013-05-28 Samsung Electronics Co., Ltd. Efficient uplink feedback in a wireless communication system
US8767872B2 (en) * 2007-05-18 2014-07-01 Qualcomm Incorporated Pilot structures for ACK and CQI in a wireless communication system
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