WO2012005522A2 - 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
WO2012005522A2
WO2012005522A2 PCT/KR2011/004971 KR2011004971W WO2012005522A2 WO 2012005522 A2 WO2012005522 A2 WO 2012005522A2 KR 2011004971 W KR2011004971 W KR 2011004971W WO 2012005522 A2 WO2012005522 A2 WO 2012005522A2
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WIPO (PCT)
Prior art keywords
control information
information
ack
nack
pucch
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PCT/KR2011/004971
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English (en)
Korean (ko)
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WO2012005522A9 (fr
WO2012005522A3 (fr
Inventor
이현우
한승희
정재훈
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엘지전자 주식회사
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Publication of WO2012005522A2 publication Critical patent/WO2012005522A2/fr
Publication of WO2012005522A9 publication Critical patent/WO2012005522A9/fr
Publication of WO2012005522A3 publication Critical patent/WO2012005522A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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

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 may 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) ⁇ 1 system, frequency division multiple access (FDMA) system, time division multiple access (TDMA) system, ort hogon a 1 frequency division multiple access (OFDMA) system, SC And a single carrier frequency division multiple access (FDMA) system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC single carrier frequency division multiple access
  • 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, a signal processing, and an apparatus therefor for efficiently transmitting control information. It is another object of the present invention to efficiently allocate resources for transmitting control information.
  • the present invention provides a method and apparatus for allocating the same.
  • the present invention provides a method for a terminal to transmit control information to a base station in a wireless communication system, the at least one physical downlink (PDCCH) through at least one serving cell configured in the terminal from the base station Receiving control channel) and transmitting second control information to the base station together with first control information for the at least one PDCCH reception, if the first control information is equal to or greater than the maximum number of bits supported. At least a portion of the first control information may be bundled to be transmitted together with the second control information.
  • PDCCH physical downlink
  • the first control information may be an acknowledgment acknowledgment (ACK) or a negative acknowledgment (NACK) information
  • the second control information may be information on a scheduling request (SR).
  • the bundling may be performed on the first control information of a secondary cell (Scell) of the at least one serving cell.
  • Scell secondary cell
  • the bundling may be spatial bundling.
  • the bundling may be partial bundling.
  • the maximum number of supported bits may be determined according to a mapping table for predefined channel selection.
  • the first control information may be an acknowledgment acknowledgment (ACK) or an acknowledgment acknowledgment (NACK) information, and the maximum number of supported bits is a mapping table for predefined channel selection.
  • the second control information may be mapped to received acknowledgment ACK information or NACK information of the first control information preset in the mapping table.
  • the second control information is information on a scheduling request (SR), and when the second control information indicates the scheduling request, the second control information is affirmative reception of the preset first control information. If it is mapped to acknowledgment ACK information and indicates that the second control information does not request the scheduling, the second control information may be mapped to NACK information of the preset first control information. Can be.
  • SR scheduling request
  • the bundled first control information and the second control information may be transmitted through one uplink serving cell.
  • the bundled first control information and the second control information may be transmitted through the same subframe.
  • the terminal for transmitting control information from the wireless communication system to the base station, at least one through the at least one serving cell configured in the terminal from the base station
  • a receiver for receiving a physical downlink control channel (PDCCH) of the receiver, when the first control information for the at least one PDCCH reception is more than the maximum number of bits supported (bundling) for at least a portion of the first control information
  • the second control information together with the processor and the bundled first control information. It may include a transmitter for transmitting to the base station.
  • the first control information may be a positive acknowledgment response (ACK) or a negative acknowledgment (MCK) information
  • the second control information may be information on a scheduling request (SR).
  • the bundling is a secondary cell of the at least one serving cell.
  • Cell Scell
  • Scell Scell
  • the bundling may be spatial bundling.
  • the bundling may be partial bundling.
  • the maximum number of supported bits may be determined according to a mapping table for a channel select ion.
  • control information can be efficiently transmitted in a wireless communication system.
  • a channel format and a signal processing method for efficiently transmitting control information can be provided.
  • 1 shows a configuration of a terminal and a base station to which the present invention is applied.
  • 2 illustrates a signal processing procedure for transmitting an uplink signal by a terminal.
  • FIG. 3 illustrates a signal processing procedure for transmitting a downlink signal by a base station.
  • 4 illustrates an SC-FDMA scheme and an 0FDMA scheme to which the present invention is applied.
  • 5 illustrates examples of mapping input symbols to subcarriers in the frequency domain while satisfying a single carrier characteristic.
  • FIG. 6 illustrates a signal processing procedure in which DFT process output samples are mapped to a single carrier in clustered SC-FDMA.
  • FIG. 7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a clustered SC-FDMA.
  • FIG. 9 illustrates a signal processing procedure of segmented SOFDMA.
  • 10 illustrates examples of a radio frame structure used in a wireless communication system.
  • 12 shows a structure for determining a PUCCH for ACK / NACK transmission.
  • 13 and 14 illustrate slot level structures of PUCCH formats la and lb for ACK / NACK transmission.
  • FIG. 15 shows PUCCH formats 2 / 2a / 2b in the case of standard cyclic prefix.
  • FIG. 16 illustrates PUCCH formats 2 / 2a / 2b in case of extended cyclic prefix.
  • FIG. 17 illustrates ACK / NACK channelization for PUCCH formats la and lb.
  • FIG. 18 shows channelization for a mixed structure of PUCCH format 1 / la / lb and format 2 / 2a / 2b in the same PRB.
  • PRB physical resource block
  • DL CCs downlink component carriers
  • FIG. 21 illustrates a concept of managing uplink component carriers (UL CCs) in a terminal.
  • FIG. 22 illustrates a concept in which one MAC manages multiple carriers in a base station.
  • FIG. 23 illustrates a concept in which one MAC manages multiple carriers in a terminal.
  • FIG. 24 illustrates a concept in which a plurality of MACs manages multiple carriers in a base station.
  • 25 illustrates a concept in which a plurality of MACs manages multiple carriers in a terminal.
  • FIG. 26 illustrates another concept in which a plurality of MACs manages multiple carriers in a base station.
  • FIG. 27 illustrates another concept in which a plurality of MACs manages multiple carriers in a terminal.
  • FIG. 28 illustrates asymmetrical carrier aggregation in which five downlink component carriers (DL CCs) are linked with one uplink component carrier (UL CCs).
  • 29 to 32 illustrate a structure of a PUCCH format 3 to which the present invention is applied and a signal processing procedure therefor.
  • 33 illustrates a transmission structure of ACK / NACK information using channel selection to which the present invention is applied.
  • 35 illustrates a configuration process of a PUCCH format according to an embodiment of the present invention.
  • multiple access systems examples include CDM code division multiple access (FDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (0FDMA) systems, and single carrier frequency division multiple access (SC_FDMA).
  • FDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC_FDMA single carrier frequency division multiple access
  • Multi-carrier frequency division multiple access (MC-FDMA) system may be implemented in a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented in wireless technologies such as GSMCGlobal System for Mobile communication (GPS), General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE).
  • GPS Global Terrestrial Radio Access
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • 0FDMA can be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.ll (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802 '20, E-etra (UTRA).
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • WiMAX WiMAX
  • IEEE 802 '20 E-etra
  • UTRAN is part of UMTSOJniversal Mobile Telecommunication System (3GPP) and 3rd Generat ion Partnershi Project)
  • LTECLong Term EvoluLioii) is part of E—UMTS using E ⁇ UTRAN.
  • LTE-advanced is an evolution of PP LTE.
  • LTE-A is an evolution of PP LTE.
  • the technical features of the present invention are not limited thereto.
  • the following detailed description is described based on a wireless communication system in which the wireless communication system is based on a 3GPP LTE / LTE-A system, any other wireless communication except for those specific to 3GPP LTE / LTE-A may be used. Applicable to the system as well.
  • a terminal may be fixed or mobile, and collectively refers to devices that transmit and receive various data and control information by communicating with a base station.
  • the terminal is a UE (User Equipment), an MS (Mobi le Station), an MT (Mobi le Terminal), or a UT (User)
  • a base station generally means a fixed station communicating with a terminal or another base station, and communicates with the terminal and other base stations to exchange various data and control information.
  • the base station may be named in other terms such as an evolved-NodeB (eNB ) , a base transceiver system (BTS), an access point, and the like.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • the specific signal is assigned to the frame / subframe / slot / carrier / subcarrier means that the specific signal is transmitted through the carrier / subcarrier in the period or timing of the frame / subframe / slot.
  • the rank or transmission rank refers to the number of layers multiplexed or allocated on one OFDM symbol or one resource element.
  • PDCCH Physical Downl Ink Control CHannel
  • PCF I CH Physical Control Format Indi cator CHannel
  • PHICH Physical Hybrid automatic retransmit t request Indicator CHannel
  • PDSCH Physical cal Down 1 ink Shared CHannel Represents a set of resource elements that carry ACK / NACK (ACKnowlegement / Negative ACK) / downlink data for DCKDovnl ink Control Informat ion (CFK) / Control Format Indicator (CFI) / Uplink transmission, respectively.
  • PUCCH Physical Upl Ink Control CHannel
  • PUSCH Physical Upl Ink Shared CHannel
  • PRACH Physical Random Access CHannel
  • UCI Upl Ink Control Informat ion
  • PDCCH / PCF CH / PH I CH / PDSCH / PUCCH / PUSCH / PRACH resource.
  • the expression that the terminal transmits the PUCCH / PUSCH / PRACH may be used in the same meaning as transmitting the uplink control information / uplink data / random access signal on the PUSCH / PUCCH / PRACH.
  • the base station is a PDCCH / PCF ICH / PHICH / PDSCH
  • the expression “transmission” may be used in the same meaning as transmitting downlink control information / downlink data and the like on the PDCCH / PCFICH / PHICH / PDSCH.
  • mapping the ACK / NACK information to a specific constellation point is used in the same meaning as mapping the ACK / NACK information to a specific complex modulation symbol.
  • mapping ACK / NACK information to a specific complex modulation symbol is used in the same sense as modulating ACK / NACK information to a specific complex modulation symbol.
  • the terminal operates as a transmitting device in the uplink and the receiving device in the downlink.
  • the base station operates as a receiving device in the uplink and as a transmitting device in the downlink.
  • a terminal and a base station are antennas 500a and 500b capable of receiving information, data, signals or messages, and a transmitter 100a which controls the antennas and transmits information, data, signals or messages. 100b), receivers 300a and 300b for controlling the antenna to receive information, data, signals or messages, and memories 200a and 200b for temporarily or permanently storing various information in the wireless communication system.
  • the terminal and the base station are operatively connected to components such as a transmitter, a receiver, and a memory, and include processors 400a and 400b configured to control each component.
  • the transmitter 100a, the receiver 300a, the memory 200a, and the processor 400a in the terminal may be embodied as independent components by separate chips, respectively, and two or more may be included in one chip. It may be implemented by.
  • the transmitter 100b, the receiver 300b, the memory 200b, and the processor 400b in the base station are each separated by separate chips. It may be implemented as a component, or two or more may be implemented by one chip (dup).
  • the transmitter and the receiver may be integrated to be implemented as one transceiver in the terminal or the base station.
  • the antennas 500a and 500b transmit a signal generated by the transmitters 100a and 100b to the outside or receive a signal from the outside and transmit the signal to the receivers 300a and 300b.
  • Antennas 500a and 500b are also called antenna ports.
  • the antenna port may correspond to one physical antenna or may be configured by a combination of a plurality of physical antennas.
  • a transceiver supporting a multi-input multi-output (MIM0) function for transmitting and receiving data using a plurality of antennas, it may be connected to two or more antennas.
  • Processors 400a and 400b typically control the overall operation of various components or models within a terminal or base station.
  • the processor (400a, 400b) is a control function for performing the present invention, MAC (Medium Access Control) frame variable control function according to the service characteristics and propagation environment, power saving mode function for controlling the idle mode operation, hand Handover, authentication and encryption functions can be performed.
  • Processors 400a and 400b may also be referred to as controllers, microcontrollers, microprocessors or microcomputers. Meanwhile, the processors 400a and 400b may be implemented by hardware or firmware, software or a combination thereof.
  • DSPs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • firmware or software may be configured to include modules, procedures, or functions for performing the functions or operations of the present invention, and may be configured to perform the present invention.
  • the firmware or software may be provided in the processors 400a and 400b or may be stored in the memory 200a and 200b to be driven by the processors 400a and 400b.
  • the transmitters 100a and 100b perform a predetermined coding and modulation on a signal or data that is scheduled from the processor 400a or 400b or a scheduler connected to the processor and transmitted to the outside, and then the antenna 500a, 500b).
  • the transmitters 100a and 100b and the receivers 300a and 300b of the terminal and the base station may be configured differently according to a process of processing a transmission signal and a reception signal.
  • the memory 200a or 200b may store a program for processing and controlling the processors 400a and 400b and may temporarily store information input and output.
  • memories 200a and 200b may be utilized as buffers.
  • the memory may be a flash memory type, a hard disk type, a multimedia card micro type or a card type memory (e.g. SD or XD memory), RAM Access Memory (RAM), Static Random Access Memory (SRAM), ROM (Read_0nly Memory, ROM), Electrolytically Erasable Programmable Read-On ly Memory (EEPR0M), Programmable Read-On ly Memory (PROM), Magnetic Memory, Magnetic It can be implemented using a disk, an optical disk, and the like.
  • 2 illustrates a signal processing procedure for transmitting an uplink signal by a terminal.
  • the transmitter 100a in the terminal may include a scrambled module 201, a modulation mapper 202, a precoder 203, a resource element mapper 204, and an SC—FDMA signal generator 205. have.
  • the scramble modes 201 may scramble the transmitted signal using the scrambled signal.
  • the scrambled signal is input to the modulation mapper 202 to perform Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), or 16 QAM / 64 Quadrature Amplitude Modulation (QAM) modulation methods, depending on the type of the transmitted signal or the channel state.
  • BPSK Binary Phase Shift Keying
  • QPSK Quadrature Phase Shift Keying
  • QAM Quadrature Amplitude Modulation
  • Modulated by a complex modulation symbol is processed by the precoder 203 and then input to the resource element mapper 204, which can map the complex modulation symbol to a time-frequency resource element.
  • the signal thus processed may be transmitted to the base station through the antenna port via the SC-FDMA signal generator 205.
  • the transmitter 100b in the base station includes a scramble mode 301, a modulation mapper 302, a layer mapper 303, a precoder 304, a resource element mapper 305, and a 0FDMA signal generator 306. It may include.
  • the signal or codeword may be modulated into a complex modulation symbol through the scramble modes 301 and the modulation chipper 302 similar to FIG. 2.
  • the complex modulation symbols are mapped to a plurality of layers by the layer mapper 303, and each layer may be multiplied by the precoding matrix by the precoder 304 and assigned to each transmit antenna. Transmission for each antenna processed as above
  • the signals are mapped to time-frequency resource elements by the resource element mapper 305 and may be transmitted through each antenna port via an Orthogonal Frequency Division Multiple Access (0FDMA) signal generator 306.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • a Peak-to-Average Ratio (PAPR) is a problem as compared with a case in which a base station transmits a signal in downlink. Accordingly, as described above with reference to FIGS. 2 and 3, the SC-FDM Single Carrier-Frequency Division Multiple Access (SC) method is used for uplink signal transmission, unlike the 0FDMA method used for downlink signal transmission.
  • SC Single Carrier-Frequency Division Multiple Access
  • 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 additional modules 406 are the same.
  • the terminal for transmitting a signal in the SC-FDMA scheme further includes an N-point DFT models 402.
  • the N-point DFT modes 402 partially offset the IDFT processing impact of the M-point IDFT modes 404 so that the transmitted signal has a single carrier property.
  • FIG. 5 illustrates examples of mapping input symbols to subcarriers in the frequency domain while satisfying a single carrier characteristic. According to one of FIGS. 5A and 5B, when a DFT symbol is allocated to a subcarrier, a transmission signal satisfying a single carrier property can be obtained.
  • FIG. 5 (a) illustrates a localized mapping method and FIG. 5 (b) illustrates a distributed mapping method. It is shown.
  • Clustered DFT—s-OFDM is a variation of the conventional SOFDMA scheme, in which a signal through a precoder is transformed into several subblocks and then discontinuously mapped to a subcarrier. 6 to 8 show examples in which input symbols are mapped to a single carrier by clustered DFT—s-OFDM.
  • FIG. 6 illustrates a signal processing process in which DFT process output samples are mapped to a single carrier in clustered SC-FDMA.
  • 7 and 8 illustrate a signal processing procedure in which DFT process output samples are mapped to multi-carriers in a clustered SC-FDMA. 6 illustrates an example of applying intra-carrier clustered SC-FDMA
  • FIGS. 7 and 8 correspond to an example of applying inter-carrier clustered SC_FDMA.
  • FIG. 7 illustrates a case in which a signal is generated through a single IFFT block when subcarrier spacing between adjacent component carriers is aligned in a situation 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 is simply an extension of the existing SC-FDMA DFT spreading and IFFT frequency subcarrier mapping configuration as the number of IFFTs equal to the number of DFTs is applied and the relationship between the DFT and IFFT has a one-to-one relationship.
  • -FDMA or NxDFT-s-OFDMA This disclosure covers them in segment SC— Called FDMA.
  • the Segmin SC-FDMA performs a DFT process in group units by grouping all time domain modulation symbols into N (N is an integer greater than 1) groups to alleviate a single carrier characteristic condition.
  • FIG. 10 illustrates examples of a radio frame structure used in a wireless communication system.
  • FIG. 10 (a) illustrates a radio frame according to the frame structure type KFS-1 of the 3GPP LTE / LTE-A system
  • FIG. 10 (b) shows the frame structure type 2 of the 3GPP LTE / LTE-A system.
  • a radio frame according to FS-2) is illustrated.
  • the frame structure of FIG. 10 (a) may be applied to a frequency division duplex (FDD) mode and a half FDD (H-FDD) mode.
  • the frame structure of FIG. 10 (b) may be applied in a TDD Time Division Duplex (mode).
  • FDD frequency division duplex
  • H-FDD half FDD
  • mode TDD Time Division Duplex
  • a radio frame used in 3GPP LTE / LTE-A has a length of 10 ms (307200 Ts) and is composed of 10 equally sized subframes.
  • Each of 10 subframes in one radio frame may be assigned a number.
  • Each subframe has a length of 1 ms and consists of two slots. 20 slots may be sequentially numbered from 0 to 19 in one radio frame. Each slot is 0.5ms long.
  • the time for transmitting one subframe is defined as a transmission time interval (TTI).
  • the time resource may be classified by a radio frame number (black radio frame index), a subframe number (or subframe number), a slot number (or slot index), and the like.
  • the radio frame may be configured differently according to the duplex mode. For example, in the FDD mode, downlink transmission and uplink transmission are classified by frequency, The radio frame includes only one of a downlink subframe or an uplink subframe.
  • downlink transmission and uplink transmission are classified by time, and thus, subframes within a frame are divided into downlink subframes and uplink subframes.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • At least one physical uplink control channel (PUCCH) may be allocated to the control region for transmitting uplink control information (UCI).
  • at least one physical uplink shared channel (PUSCH) may be allocated to the data area for transmitting user data.
  • PUCCH and PUSCH cannot be simultaneously transmitted in order to maintain a single carrier characteristic.
  • the uplink control information (UCI) transmitted by the PUCCH differs in size and use according to the PUCCH format.
  • the size of the uplink control information may vary according to the coding rate.
  • the following PUCCH format may be defined.
  • PUCCH format 1 is used for on-off keying ( ⁇ ) modulation and scheduling request (SR).
  • PUCCH format la and lb used to transmit ACK / NACK (Acknowledgment / Negative Acknowledgment) information
  • PUCCH format la 1 bit ACK / NACK information modulated by BPSK
  • PUCCH format lb 2-bit ACK / NACK information modulated with QPSK
  • PUCCH Po 1 2 Modulation to QPSK, used for CQI transmission
  • PUCCH formats 2a and 2b used for simultaneous transmission of CQI and ACK / NACK information
  • Table 1 shows a modulation scheme and the number of bits per subframe according to the PUCCH format.
  • Table 2 shows the number of RSs per slot according to the PUCCH format.
  • Table 3 shows SC—FDMA symbol positions of a reference signal (RS) according to the PUCCH format.
  • RS reference signal
  • PUCCH formats 2a and 2b correspond to a case of normal CP.
  • subcarriers having a long distance based on a DCXDirect Current subcarrier are used as a control region.
  • subcarriers located at both ends of the uplink transmission bandwidth are allocated for transmission of uplink control information.
  • the DC subcarriers are left unused for signal transmission and are mapped to the carrier frequency fo during frequency upconversion by the OFDMA / SC—FDMA signal generator.
  • PUCCH for one UE is allocated to an RB pair in a subframe, and the RBs belonging to the RB pair occupy different subcarriers in two slots.
  • the PUCCH allocated in this way is expressed as that the RB pair allocated to the PUCCH is frequency hopped at the slot boundary. However, if frequency hopping is not applied, the RB pair occupies the same subcarrier in two slots. Regardless of whether or not frequency hopping, since the PUCCH for the UE is allocated to the RB pair in the subframe, the same PUCCH is transmitted twice, once through one RB in each slot in the subframe.
  • an RB pair used for PUCCH transmission in a subframe is called a PUCCH region.
  • the PUCCH region and codes used in the region are named as PUCCH resources. That is, different PUCCH resources may have different PUCCH regions or different codes within the same PUCCH region.
  • a PUCCH for transmitting ACK / NACK information is named ACK / NACK PUCCH
  • a PUCCH for transmitting CQI / PMI / RI information is named CSKChannel State Information
  • SR PUCCH a PUCCH for transmitting SR information
  • the terminal is allocated a PUCCH resource for transmission of uplink control information from the base station by an explicit method or an implicit method.
  • Uplink link control information such as ACK / NACK (ACIinow 1 egement / negat i ACK) information, CQI (Channel Quality Indicator) information, PMI (Precoding Matrix Indicator) information, RI (Rank Information), and SR (Scheduling Request) information (UCI) may be transmitted on the control region of the uplink subframe.
  • ACK / NACK ACIinow 1 egement / negat i ACK
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • RI Rank Information
  • SR Service Request
  • a terminal and a base station transmit and receive signals or data.
  • the terminal decodes the received data and, if the data decoding is successful, transmits an ACK to the base station. If the data decoding is not successful, send a NACK to the base station.
  • the terminal receives a PDSCH from a base station and transmits an ACK / NACK for the PDSCH to the base station through an implicit PUCCH determined by a PDCCH carrying scheduling information for the PDSCH.
  • the terminal may be regarded as a discontinuous transmission (DTX) state, and according to a predetermined rule, it is treated as if no data is received or NACK (data is received, but decoding is not successful. Case).
  • DTX discontinuous transmission
  • PUCCH resources for the transmission of the ACK / NACK information is not previously allocated to the terminal, a plurality of PUCCH resources are used by the plurality of terminals in the cell divided at each time point.
  • the PUCCH resource used by the UE to transmit ACK / NACK information is determined in an implicit manner based on a PDCCH carrying scheduling information for a PDSCH transmitting corresponding downlink data.
  • the entire region in which the PDCCH is transmitted is composed of a plurality of CCEs, and the PDCCH transmitted to the UE is composed of one or more CCEs.
  • the CCE includes a plurality of (eg, nine) REGCResource Element Groups.
  • One REG is composed of four neighboring REs (RE) except for a reference signal (RS).
  • the UE transmits ACK / NACK information through an implicit PUCCH resource derived or calculated by a function of a specific CCE index (eg, the first or lowest CCE index) among the indexes of the CCEs constituting the received PDCCH.
  • the lowest CCE index of the PDCCH corresponds to a PUCCH resource index for ACK / NACK transmission.
  • the UE may derive or calculate a PUCCH from an index of 4 CCEs, which is the lowest CCE constituting the PDCCH. For example, ACK / NACK is transmitted to the base station through the PUCCH resource corresponding to No. 4.
  • the PUCCH resource index may be determined as follows.
  • n (1) P UCCH represents a PUCCH resource index for transmitting ACK / NACK information
  • N (1) PUCCH represents a signal value received from a higher layer.
  • n CCE represents the smallest value among the CCE indexes used for PDCCH transmission.
  • 13 and 14 illustrate slot level structures of PUCCH formats la and lb for ACK / NACK transmission.
  • 13 shows the PUCCH formats la and lb in the case of standard cyclic prefix.
  • 14 shows the PUCCH formats la and lb in the case of extended cyclic prefix.
  • uplink control information having the same content is repeated in units of slots in a subframe.
  • the ACK / NACK signal is repeated at different times in a CG-CAZAC (Computer generated constant amplitude zero auto correlation) sequence. It is transmitted through different resources consisting of a cyclic shift (CS) (frequency domain code) and an orthogonal cover or orthogonal cover code (0C or OCC) (time domain spreading code).
  • 0C includes, for example, Walsh / DFT orthogonal code.
  • a total of 18 terminals may be multiplexed within the same physical resource block (PRB) based on a single antenna.
  • Orthogonal sequences w0, wl, w2, w3 may be applied in any time domain (after FFT modulation) or in any frequency domain (before FFT modulation).
  • the slot level structure of PUCCH format 1 for transmitting scheduling request (SR) information is the same as that of PUCCH formats la and lb, and only its modulation method is different.
  • PUCCH resources consisting of CS OC, Physical Resource Block (PRB), and RS (Reference Signal) may be allocated to the UE through RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the PUCCH resource is a PDSCH. It can be implicitly allocated to the UE using the smallest CCE index of the PDCCH or PDCCH for SPS release.
  • 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.
  • CS Cyclic Shift
  • OC Orthothogonal Cover
  • the resource n r for PUCCH format 1 / la / lb includes the following combination.
  • n r includes n cs , n oc and n rb when the indices representing CS, OC and RB are n cs , n 0C) n rb , respectively.
  • CQI, PMI, RI, and a combination of CQI and ACK / NACK may be delivered through PUCCH format 2 / 2a / 2b.
  • Reed Muller (RM) channel coding may be applied.
  • channel coding for uplink CQI is described as follows.
  • a bit stream ⁇ 1 3 is channel coded using a (20, A) RM code.
  • Table 7 shows a basic sequence for the (20, A) code.
  • " 0 " and " ⁇ 1 are the most significant bit (MSB) and LSB (Least) Significant Bit).
  • MSB most significant bit
  • LSB least-significant Bit
  • the maximum transmission bit is 11 bits ⁇ QPSK modulation may be applied after coding to 20 bits using the RM code. Before QPSK modulation, the coded bits can be scrambled.
  • the channel coding bit B-1 may be generated by Equation 2.
  • Table 8 shows the UCKUplink Control Information field for wideband reporting (single antenna port, transmit diversity or open loop spatial multiplexing PDSCH) CQI feedback.
  • Table 9 shows uplink control information (UCI) fields for wideband CQI and PMI feedback, which are closed loop spatial multiplexing. Report a PDSQI transmission.
  • UCI uplink control information
  • Table 10 shows an uplink control information (UCI) field for RI feedback for wideband reporting.
  • UCI uplink control information
  • the PRB may be used for PUCCH transmission in slot n s .
  • a multicarrier system or a carrier aggregation system includes a plurality of bands having a band smaller than a target bandwidth for wideband support.
  • a system that aggregates and uses carriers When a plurality of carriers having a band smaller than the target band are aggregated, the band of the aggregated carriers may be limited to the bandwidth used by the existing system for backward compat ibi Hty.
  • the existing LTE system supports bandwidths of 1.4, 3, 5, 10, 15, and 20 MHz, and the LTE-Advanced (LTE-A) system improved from the LTE system only uses bandwidths supported by LTE. It can support bandwidth greater than 2 (MHz), or can support carrier aggregation by defining a new bandwidth regardless of the bandwidth used by existing systems.
  • LTE-A LTE-Advanced
  • Multicarrier is a name commonly used with carrier aggregation and bandwidth aggregation. Merging can collectively refer to both contiguous and non-contiguous carrier merging, and carrier merging is the same intra-band carrier merging and different inter-bands. ) Carrier aggregation may be collectively referred to.
  • FIG. 20 illustrates a concept of managing downlink component carriers (DL CCs) in a base station
  • FIG. 21 illustrates a concept of managing uplink component carriers (UL CCs) in a terminal.
  • DL CCs downlink component carriers
  • UL CCs uplink component carriers
  • the upper layer will be briefly described as MAC in FIGS. 19 and 20.
  • 22 illustrates a concept in which one MAC manages multiple carriers in a base station.
  • 23 illustrates a concept in which one MAC manages multiple carriers 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, and thus, there is an advantage of being more flexible in terms of resource management.
  • one PHY is one for convenience. It means a component carrier.
  • one ⁇ does not necessarily mean an independent radio frequency (RF) device.
  • one independent RF device means one PHY, but is not limited thereto, and one F device may include several PHYs.
  • FIGS. 24 and 25 illustrate a concept in which a plurality of MACs manages multiple carriers in a base station.
  • 25 illustrates a concept in which a plurality of MACs manages multiple carriers in a terminal.
  • 26 illustrates another concept in which a plurality of MACs manages multiple carriers in a base station.
  • 27 illustrates another concept in which a plurality of MACs manages multiple carriers in a user equipment.
  • multiple carriers may control several carriers instead of one.
  • each carrier may be controlled by one MAC, and for some carriers, each carrier is controlled by one MAC and 1: 1 for some carriers, as shown in FIGS. 26 and 27.
  • One or more carriers may be controlled by one MAC.
  • the above system is a system including a plurality of carriers from 1 to N, each carrier can 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 a plurality of carriers for uplink and downlink, respectively.
  • asymmetrical carrier aggregation with different numbers of carriers and / or bandwidths of carriers merged in uplink and downlink may also be supported.
  • FIG. 28 illustrates asymmetrical carrier aggregation consisting of five downlink component carriers (DL CCs) and one uplink component carrier (UL CCs).
  • the illustrated asymmetric carrier aggregation may be configured in terms of uplink control information (UCI) transmission.
  • UCI uplink control information
  • Specific UCIs eg, ACK / NACK responses
  • DL CCs downlink component carriers
  • UL CCs uplink component carrier
  • a specific UCI (eg, ACK / NACK answer to DL CC) is transmitted through one predetermined UL CC (eg, primary CC, primary cell, or PCell).
  • predetermined UL CC eg, primary CC, primary cell, or PCell.
  • DTX discontinuous transmission
  • the carrier aggregation is illustrated as an increase in the amount of uplink control information.
  • 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.
  • Similar to ACK / NACK control information associated with a plurality of DL CCs is transmitted through one UL CC. Even when transmitting, the amount of J information to be transmitted increases. For example, when it is necessary to transmit CQI / PMI / RI for a plurality of DL CCs, the UCI payload may increase.
  • ACK / NACK information for a codeword is illustrated, but there is a transport block corresponding to the codeword, and it is obvious that the present invention can be applied as ACK / NACK information for a transport block.
  • the UL anchor CCOJL PCCCPrimary CO (also referred to as UL main CC) shown in FIG. 28 is a CC through which PUCCH resources or UCI are transmitted, and may be determined to be sal-specific or UE-specific. For example, the terminal may determine the CC that attempts the first random access as the primary CC. In this case, the DTX state may be explicitly fed back, or may be fed back to share the same state as the NACK.
  • LTE-A uses the concept of a cell to manage radio resources.
  • a cell is defined as a combination of downlink resources and uplink resources, and uplink resources are not essential. Therefore, the cell may be configured with only downlink resources, or with downlink resources and uplink resources. If carrier aggregation is supported, a linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource may be indicated by system information.
  • a cell operating on a primary frequency resource (or PCC) may be referred to as a primary cell (PCell), and a cell operating on a secondary frequency resource (or SCO may be referred to as a secondary cell (SCell).
  • PCC primary frequency resource
  • SCell secondary cell
  • the PCell may refer to a cell used for the UE to perform an initial connection establishment process or a connection re-configuration process, and the PCell may refer to a cell indicated in the handover process.
  • PCell and SCell may be collectively referred to as serving cells. Therefore, in the case of the UE that is in the RRC—CONNECTED state, but carrier aggregation is not configured or does not support carrier aggregation, there is only one serving cell configured with a PCell.
  • the network may be configured for a terminal supporting one or more SCells in addition to the PCell initially configured in the connection establishment process after the initial security activation process is started.
  • PCCs correspond to PCells, primary (wireless) resources, and primary frequency resources, which are commonly used.
  • the SCC is treated with the SCell, the secondary (wireless) resource, the secondary frequency resource, and they are mixed with each other.
  • the new PUCCH format proposed by the present invention is called a PUCCH format 3 in view of a carrier aggregation (CA) PUCCH format or PUCCH format 2 defined in the existing LTE release 8/9.
  • CA carrier aggregation
  • 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.
  • 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 UCI / RS symbol structures of subframe / slot level applied to PUCCH port 3, and when using UCI / RS symbol structures of PUCCH format 1 / la / lb (normal 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.
  • the number, location, etc. of UCI / RS symbols can be freely modified according to the system design.
  • PUCCH format 3 according to an embodiment of the present invention may be defined using an RS symbol structure of PUCCH formats 2 / 2a / 2b of LTE.
  • PUCCH format 3 may be used to transmit uplink control information of any type / size.
  • PUCCH format 3 according to an embodiment of the present invention may transmit information such as HARQ ACK / NACK, CQI, PMI, RI, SR, etc., and these information may have a payload of any size.
  • the drawings and the embodiment will be described based on the case where the PUCCH format 3 according to the present invention transmits ACK / NACK information.
  • FIG. 29 to 32 illustrate a structure of a PUCCH format 3 that can be used in the present invention and a signal processing procedure therefor.
  • Figures 29-32 illustrate the structure of the DFT-based PUCCH format.
  • the PUCCH is DFT precoded and is transmitted by applying a time domain OC Orthogonal Cover (SC-FDMA).
  • SC-FDMA time domain OC Orthogonal Cover
  • the DFT-based PUCCH format is collectively referred to as PUCCH format 3.
  • a channel coding block is coded by channel coding transmission bits a_0, a ⁇ 1, ..., a_M-l (e.g., multiple ACK / NACK bits).
  • M represents the size of the transmission bit
  • N represents the size of the coding bit.
  • the transmission bit includes uplink control information (UCI), for example, multiple ACK / NACK for a plurality of data (or PDSCH) received through a plurality of DL CCs.
  • UCI uplink control information
  • the transmission bits a), a-1, ..., aJW-1 are joint coded regardless of the type / number / size of the UCI constituting the transmission bits. For example, if a transmission bit includes multiple ACK / NACKs for a plurality of DL CCs, channel coding is not performed for each DL CC or for individual ACK / NACK bits, but for all bit information. A single codeword is generated.
  • Channel coding includes, but is not limited to, simple repetition, simple coding, reed muller coding, punctured RM coding, tail_biting convolut ional coding (TBCC), low-dens i ty parity-check) black includes turbo-coding.
  • coding bits may be rate-matched in consideration of modulation orders and resource amounts.
  • 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 may perform (32,0) RM coding on a plurality of control information to obtain a single codeword, and perform cyclic buffer rate-matching on this.
  • the modulator modulates the coding bits b_0, b_l, ..., b_N-l to generate modulation symbols c_0, c-1, ..., c_L-1.
  • L represents the size of the modulation symbol.
  • the modulation method is performed by modifying the magnitude and phase of the transmission signal. Modulation methods include, for example, n—Phase Shift Keying (PSK), Quadrature Amplitude Modulation (n-QAM) (n is an integer of 2 or more).
  • the modulation method may include Binary PSK (BPSK), Quadrature PSK (QPSK), 8-PSK, QAM, 16-QAM, 64-QAM, and the like.
  • the divider divides modulation symbols c— 0, c_l, ..., c_L— 1 into each slot.
  • the order / pattern / method for dividing a modulation symbol into each slot is not particularly limited.
  • the divider may divide a modulation symbol into each slot in order from the front (local type). In this case, as shown, modulation symbols c— 0, c_l, ... 7 c_L / 2-1 are divided into slot 0, and modulation symbols c_ L / 2, c efficientlyL / 2 + l, ... , c_L-l 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 performs DFT precoding (eg, 12-point DFT) on the modulation symbols divided into each slot to produce a single carrier waveform.
  • DFT precoding eg, 12-point DFT
  • modulation symbols c ⁇ 0, c_l, ..., c_L / 2-l allocated to the slots are DFT precoded as DFT symbols dj), d_l, ..., d— L / 2-1
  • the modulation symbols c_ L / 2 and c_ L / 2 + 1 c_L-l allocated to slot 1 are DFT precoded into DFT symbols d_ L / 2, d— L / 2 + l, ..., d— Ll. .
  • DFT precoding can be replaced by other linear operations (eg, walsh precoding).
  • a spreading block spreads the signal on which the DFT is performed at the SC-FDMA 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. In this specification, an orthogonal code is used as a representative example of a spreading code for ease of description. Although mainly described, this is an example orthogonal code can be replaced by a quasi-orthogonal code.
  • the maximum value of the spreading code size is limited by the number of SC-FDMA symbols used for transmission of control information. For example, when four SC-FDMA symbols are used for transmission of control information in one slot, an orthogonal code (, ⁇ , ⁇ Sha3) having a length of 4 may be used for each slot.
  • DCI downlink control information
  • 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, and the generated SC-FDMA symbol is transmitted through the RF terminal.
  • the ACK / NACK bits for this may be 12 bits when including the DTX state.
  • the coding block size (after rate matching) may be 48 bits.
  • the RS may inherit the structure of the LTE system. For example, cyclic shifts can be applied to the base sequence.
  • the RS part is the cyclic shift interval
  • the multiplication capacity is determined according to A shift PUCCf ⁇ .
  • the multiplexing capacity is given by 12 / ms shiit PUCCH .
  • the multiplication capacity of the RS is 4 in the case of A shiit PUCCH , and the total multiplexing capacity may be limited to 4, which is the smaller of the two.
  • 31 illustrates a structure of PUCCH format 3 in which multiplexing capacity may be increased at the slot level.
  • SC-FDMA symbol level spreading described in FIG. 29 and FIG. Multiple-dose can be increased.
  • Walsh Kirby or DFT code cover
  • multiplexing capacity is doubled. Accordingly, even in the case of ⁇ ⁇ 1 , the multiplexing capacity becomes 8, so that the multiplexing capacity of the data interval does not decrease.
  • 32 illustrates a structure of PUCCH format 3 in which multiplexing capacity may be increased at a subframe level.
  • the multiplexing capacity can be doubled again by applying Walsh cover on a slot basis.
  • PUCCH format 3 is not limited to the order shown in FIG. 29 to FIG. 32.
  • PUCCH resources # 0 and # 1 or PUCCH channels # 0 and # 1 may be configured for a PUCCH format lb for 2 bits of ACK / NACK information.
  • two bits of the three bits of ACK / NACK information can be represented through the PUCCH format lb, and one PUBCH resource of the two PUCCH resources is selected. It can be expressed through. example For example, one bit (two cases) may be represented by selecting one of cases in which ACK / NACK information is transmitted using PUCCH resource # 0 and cases in which ACK / NACK information is transmitted using PUCCH resource # 1. A total of 3 bits of ACK / NACK information may be represented. Table 11 shows an example of transmitting 3 bits of ACK / NACK information using channel selection. In this case, it is assumed that two PUCCH resources are configured.
  • 'A' means ACK information
  • 'N' means NACK information or NACK / DTX information
  • '1, -1, j, ⁇ j' means four complex modulation symbols in which b (0) and b (l), which are two bits of transmission information transmitted in the PUCCH format, have undergone QPSK modulation.
  • b (0) and b (l) correspond to binary transmission bits transmitted using the selected PUCCH resource.
  • binary transmission bits b (0) and b (l) may be mapped to complex modulation symbols and transmitted through PUCCH resources.
  • FIG. 34 illustrates a transmission structure of ACK / NACK information using enhanced channel select km according to the present invention.
  • FIG. 34 illustrates PUCCH # 0 and PUCCH # 1 in different time / frequency domains, this is for convenience and may be configured to use different codes in the same time / frequency domain.
  • two PUCCH resources (PUCCH resources # 0 and # 1) may be configured for a PUCCH format la for transmitting one bit of ACK / NACK information.
  • one bit of the three bits of ACK / NACK information may be represented through the PUCCH format la, and the other one bit may contain some PUCCH resource (PUCCH resource). # 0 and # 1) may be expressed depending on whether they are transmitted. Also, the last 1 bit may be expressed differently depending on which resource a reference signal is transmitted. Where the reference signal is selected first Although it is preferable to be transmitted in the time / frequency region of the PUCCH resources (PUCCH resources # 0 and # 1), it may be transmitted in the time / frequency region for the original PUCCH resource of the reference signal.
  • ACK / NACK information is transmitted through PUCCH resource # 0 and a reference signal for a resource corresponding to PUCCH resource # 0 is transmitted, ACK / NACK information is transmitted through PUCCH resource # 1 and transmitted to PUCCH resource # 1.
  • Table 13 shows an example of delivering 3 bits of ACK / NACK information using enhanced channel selection. In this case, it is assumed that two PUCCH resources are configured.
  • Table 13 is meaningful in that symbols mapped to PUCCH resources can be implemented by BPSK modulation. However, unlike the example in Table 13, it is also possible to implement complex symbols in QPSK modulation using the PUCCH format lb. In this case, the number of bits that can be transmitted on the same PUCCH resource may be increased.
  • 33 to 34 illustrate a case in which two PUCCH resources are configured to transmit 3 bits of ACK / NACK information as an example, the number of transmission bits and the number of PUCCH resources of ACK / NACK information may be variously set.
  • the same principle may be applied to the case where other uplink control information other than ACK / NACK information is transmitted or when other uplink control information is simultaneously transmitted together with the ACK / NACK information.
  • Table 14 shows an example in which two PUCCH resources are configured and six ACK / NACK states are transmitted using channel selection.
  • Table 15 shows an example in which three PUCCH resources are configured and 11 ACK / NACK states are transmitted using channel selection.
  • a case where a plurality of types of uplink control information (UCO and reference signal (RS)) are transmitted through PUCCH is as follows.
  • uplink control information capable of maintaining system performance even when a plurality of types of uplink control information and a reference signal are simultaneously transmitted
  • a method for efficiently transmitting uplink control information using limited resources will be described.
  • the description will be made mainly in the case of transmitting ACK / NACK information.
  • the present invention is not limited thereto, and various uplink control information may be applied in the same manner.
  • the terminal in order to simultaneously transmit 1-bit SR information and 2-bit ACK / NACK information, the terminal is a positive SR at that time. If reciueset is needed) ACK / NACK information in the PUCCH format lb format may be transmitted through the SR PUCCH resource. In the case of negative SR at this point (when the terminal does not require scheduling requeset), ACK / NACK information in the PUCCH format lb format may be transmitted through the ACK / iNACK PUCCH resource.
  • ACK / NACK answer for DL CC # 0 and DL CC # 1 corresponds to ACK.ACK
  • the binary transmission bit corresponding to ACK.ACK may correspond to '1,1', which may be represented by a complex modulation symbol subjected to QPSK modulation.
  • the modulated complex modulation symbol can be transmitted using SR PUCCH resources.
  • the number of ACKs is represented by binary information bits, which is QPSK modulated, and the modulated complex modulation symbol can be transmitted using the SR PUCCH resource. This may also apply to FDD.
  • Table 17 shows an example of simultaneously transmitting one bit of SR information and more than two bits of ACK / NACK information using an SR PUCCH resource.
  • the UE can infer the generation of the DTX and the number of ACK using the DAKDownlink Assignment Index for the downlink component carrier (DL CC).
  • the DAI is transmitted from the base station to the terminal on the PDCCH, the DAI for each DL CC independently of each other represents the cumulative number of PDCCH for the ACK / NACK answer in one PUCCH.
  • a method of simultaneously transmitting 1-bit SR information and ACK / NACK information using channel selection, and additionally setting an ACK / NACK PUCCH resource and transmitting the same Describes how to increase the number of bits.
  • one bit of SR information is simultaneously transmitted.
  • one bit of SR information and three bits of ACK / NACK information can be simultaneously transmitted using a total of four ACK / NACK PUCCH resources.
  • Two bits of ACK / NACK information can be expressed using a PUCCH format lb, and the remaining one bit of ACK / NACK information and one bit of SR information can be expressed using any PUCCH resource among four ACK / NACK PUCCH resources. Depending on whether the information is transmitted, two bits (four cases) can be represented.
  • a method of additionally transmitting one bit of SR information while simultaneously transmitting one bit of SR information and ACK / NACK information using channel selection will be described. For example, if two bits of ACK / NACK information are transmitted using two ACK / NACK PUCCH resources, and one bit of SR information is simultaneously transmitted, two bits are represented using the PUCCH format lb. One bit may be transmitted depending on which PUCCH resource among the ACK / NACK PUCCH resources is used to transmit ACK / NACK information. In this case, SR information may be defined according to which PUCCH resource is used.
  • ACK / NACK information when ACK / NACK information is transmitted using PUCCH resource # 0, this means no scheduling request (or resource request) (negat ive SR) and ACK / NACK using PUCCH resource # 1.
  • information when information is transmitted, it may mean that there is a scheduling request (possibly it SR).
  • the SR information may be represented as a modulation symbol mapped to a PUCCH resource.
  • a mapping table for channel selection is configured to support only a specific number of bits of ACK / NACK information (for example, 2, 3, or 4 bits of ACK / N with 2, 3, or 4 PUCCH resources, respectively). Only supporting NACK information may be supported).
  • the number of bits of the ACK / NACK information to be transmitted in a specific subframe is smaller than the maximum number of bits, other bits may be used to transmit the SR information, but the maximum bits of the mapping table may be used. If transmission of ACK / NACK information corresponding to the number is necessary, it is difficult to transmit SR information through channel selection based on the mapping table.
  • SR information and the ACK / NACK information are transmitted using fewer transmission bits. This may be applied when a PUCCH format or a channel selection method for transmitting 5-bit uplink control information is not defined.
  • component carrier region bundling and time domain bundling may be commonly referred to as partial bundling.
  • Spatial bundling or partial bundling may be performed using predefined logical operations (eg, logical AND operations) of ACK / NACKs.
  • the 4-bit ACK / NACK may be reduced to 3 bits through spatial bundling or partial bundling, and a total of 4 bits may be transmitted including 1-bit SR information.
  • a DL CC or DL subframe that performs bundling may be defined in advance. For example, bundling may be performed on ACK / NACK of a DL CC having the lowest DL CC index or the highest DL CC index.
  • the CC having the lowest DL CC index may be used in the same sense as the primary CC (or primary cell), and the highest DL A CC with a CC index can be used in the same sense as a secondary CC (or secondary cell). That is, in the case of a system consisting of 2 CCs, other CCs except the CC having the lowest DL CC index may be used in the same meaning as the secondary CC (or secondary ceil). For another example, bundling may be performed on the ACK / NACK of the most recent DL subframe or the most recent DL subframe.
  • the UE decodes PDCCH of DL CC # 0. Assume that both PDSCHs that succeed and agree with each other are ACKs, and that PDCCH decoding of DL CC # 1 has failed (eg, DTX).
  • the ACK / NACK transmission bit to be transmitted by the UE may be represented by '1 1 0 0' (assuming that ACK is 1 as NACK all 0 and NACK and DTX are expressed identically).
  • the SR information In case of transmitting 1-bit SR information together, if the SR information has a value of '1' requesting resources to the base station, it may be represented by 5 bits of '1 1 0 0 1' (the transmission bit of the SR Location).
  • the first two bits '1 1' means 'ACK, ACK' for codewords # 0 and # 1 of DL CC # 0, and the next two bits '0 0' means codeword # 0 of DL CC # 1.
  • 'NACK / DTX NACK / DTX' for # 1 and the last bit '1' means resource request for SR information.
  • spatial bundling is performed for DL CC # 1 (highest DL CC index)
  • it is represented by '1 1 0 1' and 4 bits of transmission bits are generated.
  • the PDCCH decoding of the DL CC # 1 is successful, but the codeword # 0 succeeds in decoding and the codeword # 1 decodes.
  • the ACK / NACK transmission bit is equal to '1 1 1 0'. If the SR information has a value of '1' requesting resources to the base station, transmission The bit becomes '1 1 1 0 1', and when spatial bundling is performed for DL CC # 1, the bit is represented by '1 1 0 1' and 4 bits of transmission bits are generated.
  • the transmission bit may be transmitted using a PUCCH format for transmitting 4-bit uplink control information.
  • spatial bundling may be performed on ACK / NACK information on a specific PDCCH or ACK / NACK information on semi-persistent scheduling (SPS), and the SR information may be transmitted using the remaining bits.
  • SPS semi-persistent scheduling
  • the location of the SR information is preferably transmitted after the ACK / NACK information, but may be located before the ACK / NACK information.
  • the joint transmission of the ACK / NACK information and the SR information of the present invention can always be applied in a subframe capable of simultaneous transmission of the ACK / NACK information and the SR information, but the ACK / NACK information and the SR information. It may be applied only when the UE has positive SR information (that is, when there is a real SR (scheduling request)) in a subframe capable of simultaneous transmission of.
  • the order of the ACK / NACK information or the ACK / NACK information for the SPS has a predetermined rule.
  • spatial bundling may be performed on ACK / NACK information of a secondary cell (SCell).
  • SCell secondary cell
  • the spatial bundling of the ACK / NACK information of the Scell may be applied in both a frequency division duplex (FDD) mode and a time division duplex (TDD) mode.
  • FDD frequency division duplex
  • TDD time division duplex
  • spatial bundling may be performed on ACK / NACK information of a subframe located most recently.
  • Spatial bundling may be performed on the ACK / NACK information, and this may be applied in both an FDE Frequency Division Duplex) mode and a TDD me Division Duplex) mode.
  • a method of performing partial bundling may be used for ACK / NACK information for a specific PDCCH or ACK / NACK information for semi-persistent scheduling (SPS).
  • SPS semi-persistent scheduling
  • bundling may be performed on ACK / NACK information of each subframe or component carrier.
  • partial bundling may be performed only on the ACK / NACK information of the secondary cell (SCell).
  • Partial bundling of the ACK / NACK information of the Scell is FDEKFrequency Division Duplex). It can be applied in both the mode and the time division duplex (TDD) mode.
  • the ACK / NACK feedback information of each component carrier may be 1 bit or 2 bits. Accordingly, the entire ACK / NACK feedback information for two component carriers may be 2 to 4 bits. In addition, it is assumed that the maximum number of information bits that can be transmitted through the channel selection is 4 bits.
  • the transmission method through channel selection will be described as an example, but the same may be applied to the transmission method through enhanced channel selection.
  • a channel selection mapping table corresponding to 2 bits of the total ACK / NACK information and 3 bits for 1 bit of SR information
  • the information can be transmitted by using.
  • one bit of SR information may be mapped to ACK / NACK information.
  • the case where there is an SR request may be mapped to the NACK when the case where there is no SR request may be used.
  • a channel selection mapping table corresponding to 3 bits of the total ACK / NACK information and 4 bits for 1 bit of the SR information The information may be transmitted by using the.
  • one bit of SR information may be mapped to ACK / NACK information. example For example, the case where there is an SR request may be mapped to the NACK when the SR request does not exist.
  • spatial bundling may be performed.
  • spatial bundling may be performed for simultaneous transmission of SRs without increasing the mapping table.
  • SCell's ACK / NACK information for two component carriers can be reduced from 2 bits to 1 bit through spatial bundling.
  • additional 1-bit SR information may be transmitted together with 2-bit ACK / NACK information in the PCell for the two component carriers and bundled 1-bit ACK / NACK information in the entire SCell.
  • one bit of SR information may be mapped to ACK / NACK information. For example, the case where there is an SR request may be mapped to the NACK when the SR request does not exist.
  • the information can be transmitted using an existing mapping table without creating an additional mapping table (for example, a mapping table for 5-bit information transmission).
  • a mapping table for 5-bit information transmission since the spatial bundling is applied only to the SCell, it is scheduled more frequently.
  • SR information may be simultaneously transmitted while guaranteeing the performance of the ACK / NACK information of the PCell.
  • the subframes of the SR information are allocated to the terminal by the base station so that they can know each other's positions in advance. Therefore, when simultaneous transmission of SR information and ACK / NACK information is required, the base station and the UE know the subframe necessary for the simultaneous transmission in advance. Therefore, the previous method can be applied.
  • PUCCH resources # 0 and # 1 For example, two PUCCH resources (PUCCH resources # 0 and # 1) are set, and a case in which 3 bits of ACK / NACK information is transmitted using channel selection is illustrated in Table 18.
  • Transmit bit can be increased. That is, the subframe capable of simultaneously transmitting the ACK / NACK information and the SR information may be configured to follow enhanced channel selection. Black, SR request is required in a subframe capable of simultaneous transmission of ACK / NACK information and SR information. Can be configured to follow enhanced channel selection. In this case, a case in which 1-bit SR information is simultaneously transmitted along with 3-bit ACK / NACK information using enhanced channel selection is illustrated in Table 19.
  • the same method as that for transmitting 3 bits of ACK / NACK information in Table 18 may be applied.
  • the transmission bit of the SR information is '1', that is, when the UE has a resource request to the base station, the transmission of the ACK / NACK information for PUCCH resource # 1 and PUCCH resource # 2 is maintained as it is, PUCCH resources
  • One bit may be additionally represented by transmitting a reference signal transmitted through the resource treated by # 1 and the resource treated by PUCCH resource # 2 through PUCCH resource # 1 and PUCCH resource # 2, respectively.
  • Table 20 Another case of simultaneously transmitting one bit of SR information and three bits of AC / NACK information using enhanced channel selection is illustrated as Table 20.
  • reference signal transmission for PUCCH resource # 1 and PUCCH resource # 2 is maintained as it is, but the resource is processed in PUCCH resource # 1.
  • one bit may be additionally represented by transmitting transmission bits (data portion) of the ACK / NACK information transmitted through the resources corresponding to the PUCCH resource # 2 through the PUCCH resource # 2 and the PUCCH resource # 1, respectively.
  • the reference signal is transmitted in the time / frequency domain of the PUCCH resource selected by the ACK / NACK information.
  • the transmission bit of the SR information when the transmission bit of the SR information is '0', when the terminal does not have a resource request to the base station, the same as the example for transmitting the 3-bit ACK / NACK information in Table 18.
  • the transmission bit of the SR information is '1', that is, when the UE has a resource request to the base station, the reference signal transmission through the resources to the PUCCH resource # 1 and PUCCH resource # 2 (RS portion in the table) Is maintained, and one bit is additionally transmitted by transmitting a transmission bit (data portion in the table) of ACK / NACK information transmitted through PUCCH resource # 1 and PUCCH resource # 2 through PUCCH resource # 2 and PUCCH resource # 1, respectively. I can express it.
  • the reference signal is transmitted in the time / frequency domain of the PUCCH resource selected by the ACK / NACK information.
  • Table 21 shows the transmission of one bit of SR information simultaneously with three bits of ACK / NACK information. Indicates.
  • Table 22 A method of simultaneously transmitting ACK / NACK information will be described.
  • Table 23 shows an example for three PUCCH resources being configured and transmitting 1-bit SR information and 4-bit ACK / NACK information using enhanced channel selection.
  • the transmission bit of the SR information when the terminal does not have a resource request (or scheduling request) for the base station, it is the same as the example for transmitting the 4-bit ACK / NACK information in Table 22.
  • the transmission bit of the SR information is' ⁇ , that is, when the UE has a resource request for the base station, transmission of the reference signal through the resources corresponding to the PUCCH resource # 1 and the PUCCH resource # 2 is maintained and the PUCCH resource # 1 And transmit bits of ACK / NACK information transmitted through PUCCH resource # 2 through PUCCH resource # 2 and PUCCH resource # 1, respectively.
  • the PUCCH resource # 3 and the PUCCH resource # 4 Transmission of a reference signal through a resource may be maintained and transmission bits of ACK / NACK information transmitted through PUCCH resource # 3 and PUCCH resource # 4 may be transmitted through PUCCH resource # 4 and PUCCH resource # 3, respectively.
  • two cases, that is, one bit may be additionally represented, and thus, one bit of SR information and four bits of ACK / NACK information may be simultaneously transmitted.
  • the reference signal is transmitted in the time / frequency domain of the PUCCH resource selected by the ACK / NACK information.
  • the transmission bits of ACK / NACK information are changed and transmitted in PUCCH resource # 1 and PUCCH resource # 2, and the transmission bits of ACK / NACK information are changed in PUCCH resource # 3 and PUCCH resource # 4.
  • the same principle can be applied by changing a resource through which a reference signal for the PUCCH resource is transmitted, rather than changing the PUCCH resource.
  • Table 25 shows another example of transmitting 1-bit SR information and 4-bit ACK / NACK information using enhanced channel selection.
  • the transmission bit of the SR information is '1', that is, when the terminal has a resource request for the base station
  • the PUCCH resource for the data portion is fixed, and shifts by 1 only for the resource of the reference signal.
  • the reference signal is transmitted in the time / frequency domain of the PUCCH resource selected by the data portion.
  • Table 26 shows another example of simultaneously transmitting 1-bit SR information and 4-bit ACK / NACK information using enhanced channel selection.
  • Table 23 it is sufficient to set three PUCCH resources to simultaneously transmit 4-bit ACK / NACK information and 1-bit SR information using enhanced channel selection.
  • Table 23 shows an example in which PUCCH resources are mapped to complex modulation symbols modulated by the QPSK modulation method, while Table 26 shows examples in which PUCCH resources are mapped to modulation symbols modulated by the BPSK modulation method.
  • the time / frequency domain of the PUCCH resource is determined by the reference signal portion, and a plurality of modulation symbols modulated by the data portion may be transmitted in the time / frequency domain.
  • FIG. 35 illustrates a configuration process of a PUCCH format according to an embodiment of the present invention.
  • FIG. 35 illustrates a configuration process of Table 26.
  • FIG. 35 illustrates a configuration process of Table 26.
  • the transmission bit transmitted through the PUCCH resource uses the BPSK modulation method
  • one or two bits of transmission bits may be represented depending on whether the QPSK modulation method is used.
  • an additional transmission bit may be expressed by combining the resources of the reference signal for each PUCCH resource and the PUCCH resource.
  • a resource to which a reference signal transmitted to a PUCCH resource is basically transmitted has an offset that increases 1 in an index of a resource when compared to the next state.
  • a starting resource offset of increasing 1 to the starting index of the resource to which the reference signal is transmitted is compared with the next state. Map all ACK / NACK states, increasing the two offsets.
  • the PUCCH resource to which the uplink control information is transmitted is applied with an offset of increasing 1 to the index of the PUCCH resource, and is repeated again from the beginning when all the PUCCH resources are used according to the offset of increasing the index to the index of the PUCCH resource. .
  • each PUCCH resource is changed to PUCCH resource # 0 PUCCH resource # 1-> PUCCH resource # 2-> PUCCH resource # 3
  • each resource to which RS is transmitted is changed to resource # 0 ⁇ resource # 1 — > Resource # 2-> resource # 3. Since then, PUCCH When a resource is changed in the same order of PUCCH resource # 0-> PUCCH resource # 1-> PUCCH resource # 2 PUCCH resource # 3, the resource to which the RS is transmitted is changed from resource # 1-> resource # 2-> resource # 3- > Resource # 4 in order, resource # 2 resource # 3-> resource # 0-> resource # 1, resource # 4-> resource # 0 resource # 1-> resource # 2 Can be mapped.
  • the change order of the resource in which the reference signal is transmitted to the PUCCH resource is fixed, and control information can be transmitted by changing the PUCCH resource in the above-described manner, and 1-bit SR information and 4-bit can be transmitted using various methods. It is obvious that ACK / NACK information can be expressed.
  • the embodiment using the channel selection through the QPSK modulation method can be applied, but using the enhanced channel selection through the BPSK modulation method Embodiments are also applicable.
  • a ninth embodiment an example for simultaneously transmitting one bit of SR information while transmitting two bits of ACK / NACK information using channel selection or enhanced channel selection will be described.
  • Table 27 shows an example of simultaneously transmitting two bits of ACK / NACK information and one bit of SR information using channel selection.
  • the 1-bit SR information is located at the first position of the transmission bit, MSB (Most signification bit), and the SR information is separated by PUCCH resources.
  • the 1-bit SR information is located at the first position of the transmission bit, the MSB (Most signification bit), and the SR information is divided by PUCCH resources.
  • the PUCCH is allocated to an RB pair in one subframe and frequency hopped in two slots. Therefore, when the PUCCH resource is determined in the first slot, the PUCCH resource is also determined in the second slot. However, in channel selection on a slot basis, the first slot and the second slot are separated, and the PUCCH resource in the first slot is determined.
  • the PUCCH distinguishes the ACK / NACK information from the RS information in the enhanced channel selection
  • the ACK / NACK information and the RS information are transmitted at the same physical time, frequency, that is, the same PRB.
  • RS information is transmitted through different codes at the same physical location and not transmitted at different physical locations.
  • the above-described embodiments may be applied for transmission of various uplink control information, and the number of SR information and ACK / NACK information may also be variously applied by applying the same principle.
  • another control information transmission method may be derived by combining a plurality of embodiments.
  • the transmission bits in the corresponding embodiment can be applied to the transmission of control information in the various embodiments.
  • the embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to construct embodiments of the invention by combining some components and / or features.
  • 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 obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
  • a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
  • the terminal may be replaced with terms such as UEOJser Equipment (MSOJser Equipment), MSCMobi le Station (MSS), and Mobile Subscriber Station (MSS).
  • MSOJser Equipment MSCMobi le Station
  • MSS Mobile Subscriber Station
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of implementation by hardware, one embodiment of the invention
  • DSPs Digital signal processors
  • DSPs programmable signal devices
  • FPLDs programmable programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and more. Can be implemented.
  • 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.

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un système de communication sans fil, et plus spécifiquement un procédé et un appareil permettant de transmettre des informations de commande. Le système de communication sans fil peut prendre en charge l'agrégation de porteuses (CA). Un procédé permettant à un terminal de transmettre des informations de commande à une station de base dans un système de communication sans fil consiste à : recevoir de la station de base au moins un canal physique de commande en liaison descendante (PDCCH) par l'intermédiaire d'au moins une cellule de desserte du terminal ; et transmettre à la station de base de secondes informations de commande avec les premières informations de commande à réception du ou des PDCCH, les premières informations de commande étant groupées de manière à être transmises avec les secondes informations de commande si le nombre de bits des premières informations de commande est supérieur au nombre de bits maximum pris en charge.
PCT/KR2011/004971 2010-07-07 2011-07-07 Procédé et appareil permettant de transmettre des informations de commande dans un système de communication sans fil WO2012005522A2 (fr)

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US37327510P 2010-08-13 2010-08-13
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033126A (ko) * 2007-09-28 2009-04-01 엘지전자 주식회사 무선 통신 시스템에서 제어정보 검출 방법
KR20100019949A (ko) * 2008-08-11 2010-02-19 엘지전자 주식회사 무선 통신 시스템에서 제어신호 전송 방법
KR20100020422A (ko) * 2008-08-12 2010-02-22 엘지전자 주식회사 다중반송파 무선통신시스템에서 하향링크 제어정보를 송수신하는 방법 및 장치
US20100165939A1 (en) * 2008-12-30 2010-07-01 Ko-Chiang Lin Method and Apparatus for Improving ACK/NACK Bundling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090033126A (ko) * 2007-09-28 2009-04-01 엘지전자 주식회사 무선 통신 시스템에서 제어정보 검출 방법
KR20100019949A (ko) * 2008-08-11 2010-02-19 엘지전자 주식회사 무선 통신 시스템에서 제어신호 전송 방법
KR20100020422A (ko) * 2008-08-12 2010-02-22 엘지전자 주식회사 다중반송파 무선통신시스템에서 하향링크 제어정보를 송수신하는 방법 및 장치
US20100165939A1 (en) * 2008-12-30 2010-07-01 Ko-Chiang Lin Method and Apparatus for Improving ACK/NACK Bundling

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