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WO2010018981A2 - Procédé et appareil pour la transmission d’information de commande dans un système de radiocommunication - Google Patents

Procédé et appareil pour la transmission d’information de commande dans un système de radiocommunication Download PDF

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Publication number
WO2010018981A2
WO2010018981A2 PCT/KR2009/004481 KR2009004481W WO2010018981A2 WO 2010018981 A2 WO2010018981 A2 WO 2010018981A2 KR 2009004481 W KR2009004481 W KR 2009004481W WO 2010018981 A2 WO2010018981 A2 WO 2010018981A2
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Prior art keywords
control information
sequence
index
resource
resource index
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English (en)
Korean (ko)
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WO2010018981A3 (fr
Inventor
한승희
권영현
곽진삼
김동철
정재훈
문성호
노민석
이현우
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LG Electronics Inc
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LG Electronics Inc
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Priority claimed from KR1020090041280A external-priority patent/KR20100019946A/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2010018981A2 publication Critical patent/WO2010018981A2/fr
Publication of WO2010018981A3 publication Critical patent/WO2010018981A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting control information in a wireless communication system.
  • the next generation multimedia wireless communication system which is being actively researched recently, requires a system capable of processing and transmitting various information such as video, wireless data, etc., out of an initial voice-oriented service.
  • the purpose of a wireless communication system is to enable a large number of users to communicate reliably regardless of location and mobility.
  • a wireless channel is a Doppler due to path loss, noise, fading due to multipath, intersymbol interference (ISI), or mobility of UE.
  • ISI intersymbol interference
  • There are non-ideal characteristics such as the Doppler effect.
  • Various techniques have been developed to overcome the non-ideal characteristics of the wireless channel and to improve the reliability of the wireless communication.
  • MIMO multiple input multiple output
  • MIMO techniques include spatial multiplexing, transmit diversity, beamforming, and the like.
  • the MIMO channel matrix according to the number of receive antennas and the number of transmit antennas may be decomposed into a plurality of independent channels. Each independent channel is called a spatial layer or stream.
  • the number of streams is called rank.
  • ITU International Telecommunication Union
  • 3rd generation is the next generation of mobile communication system after 3rd generation, and provides high-speed transmission rates of downlink 1 Gbps (Gigabits per second) and uplink 500 Mbps (Megabits per second), thereby enabling a multimedia seamless based on IP (internet protocol).
  • Standardization of the IMT-A (Advanced) system which aims to support seamless) services, is in progress.
  • 3GPP LTE-A (Advanced) system is considered as a candidate technology for IMT-A system.
  • the LTE-A system is progressing toward improving the completeness of the LTE system, and is expected to maintain backward compatibility with the LTE system. This is because the compatibility between the LTE-A system and the LTE system is convenient from the user's point of view, and the operator can also reuse the existing equipment.
  • a wireless communication system is a single carrier system that supports one carrier. Since the transmission rate is proportional to the transmission bandwidth, the transmission bandwidth must be increased to support the high rate. However, frequency allocation of large bandwidths is not easy except in some regions of the world.
  • spectral aggregation or bandwidth aggregation, also known as carrier aggregation
  • Spectral aggregation technology is a technique that combines a plurality of physically non-continuous bands in the frequency domain and uses the effect of using a logically large band.
  • spectrum aggregation technology multiple carriers can be supported in a wireless communication system.
  • a wireless communication system supporting multiple carriers is called a multiple carrier system.
  • the carrier may be referred to in other terms such as radio frequency (RF), component carrier, and the like.
  • the uplink control information includes acknowledgment (ACK) / not-acknowledgement (NACK) used for performing a hybrid automatic repeat request (HARQ), channel quality indicator (CQI) indicating a downlink channel state, and radio resource allocation for uplink transmission.
  • ACK acknowledgment
  • NACK not-acknowledgement
  • CQI channel quality indicator
  • SR scheduling request
  • An object of the present invention is to provide a method and apparatus for transmitting control information in a wireless communication system.
  • a control information transmission method performed by a terminal in a wireless communication system.
  • the method may include obtaining a first resource index and a second resource index, and transmitting the representative control information to the base station based on the first resource index, wherein the first resource index and the second resource index are the same. Include.
  • the representative control information may be a representative channel quality indicator (CQI).
  • CQI representative channel quality indicator
  • the representative control information may be representative ACK (acknowledgement) / NACK (not-acknowledgement) for the first data transmitted through the first downlink carrier and the second data transmitted through the second downlink carrier have.
  • the method may include transmitting the modulated sequence.
  • the transmitting of the representative control information based on the first resource index may include: determining an orthogonal sequence index based on the first resource index; and determining a cyclic shift index based on the first resource index. Generating a cyclically shifted sequence by cyclically shifting a base sequence by an amount of cyclic shifts obtained from the cyclic shift index; Generating a spreading sequence by spreading the modulated sequence into an orthogonal sequence obtained from the orthogonal sequence index, mapping the spreading sequence to a resource block obtained from the first resource index, and then spreading the spreading sequence And transmitting the sequence.
  • said first resource index may be received from said base station.
  • said first resource index is obtained from a first radio resource for a first physical control channel for receiving said first data
  • said second resource index is a second physical index for receiving said second data. May be obtained from a second radio resource for a control channel
  • the resource block may include a plurality of subcarriers and a plurality of orthogonal frequency division multiplexing (OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • the modulated sequence may be generated by multiplying the modulation symbol for the representative CQI by the cyclically shifted sequence.
  • a method of transmitting control information performed by a terminal in a wireless communication system includes obtaining a first resource index and a second resource index, transmitting first control information to a base station based on the first resource index through a first slot in a subframe, and a second in the subframe. And transmitting second control information to the base station through the slot based on the second resource index.
  • the first control information is a first ACK / NACK for the first data transmitted on the first downlink carrier
  • the second control information is to the second data transmitted on the second downlink carrier It may be a second ACK / NACK for.
  • the first control information may be a first CQI for a first downlink carrier
  • the second control information may be a second CQI for a second downlink carrier.
  • a radio frequency (RF) unit for generating and transmitting a radio signal and connected to the RF unit to obtain a first resource index and a second resource index, wherein the first resource index and the second resource index Is the same, and provides an apparatus for wireless communication comprising a processor for transmitting the representative control information based on the first resource index.
  • RF radio frequency
  • FIG. 1 is a block diagram illustrating a wireless communication system.
  • HARQ hybrid automatic repeat request
  • NACK not-acknowledgement
  • CQI channel quality indicator
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • FIG 5 shows an example of a resource grid for one uplink slot in 3GPP LTE.
  • FIG. 6 shows an example of a structure of a downlink subframe in 3GPP LTE.
  • FIG. 7 shows an example of a structure of an uplink subframe in 3GPP LTE.
  • PUCCH physical uplink control channel
  • CP normal cyclic prefix
  • FIG. 10 shows an example of PUCCH format 2 / 2a / 2b transmission in case of normal CP.
  • FIG. 11 shows an example of PUCCH format 2 / 2a / 2b transmission in case of an extended CP.
  • FIG. 12 is a flowchart illustrating an example of an information transmission method.
  • FIG. 13 is a flowchart illustrating another example of an information transmission method.
  • FIG. 14 is a flowchart illustrating still another example of an information transmission method.
  • 15 is a flowchart illustrating an example of an information processing method based on a resource index.
  • 16 is a flowchart illustrating another example of an information processing method based on a resource index.
  • FIG. 17 shows an example of a linkage method between a downlink carrier and an uplink carrier in a multi-carrier system of symmetric aggregation.
  • 18 is a flowchart illustrating an example of a method for transmitting control information in a multi-carrier system.
  • 19 is a flowchart illustrating a representative control information transmission method according to an embodiment of the present invention.
  • 20 shows an example of an association method between a downlink carrier and an uplink carrier in a multi-carrier system having a number of downlink carriers to uplink carriers 2: 1.
  • FIG. 21 shows an example of an association method between a downlink carrier and an uplink carrier in a multicarrier system having a number of downlink carriers to uplink carriers of 3 to 2.
  • 22 is a flowchart illustrating a method of transmitting control information according to another embodiment of the present invention.
  • FIG. 23 illustrates an example of transmitting two control information as one control signal using a PUCCH format 1 / 1a / 1b in the case of a normal CP.
  • FIG. 24 illustrates an example of transmitting two control information as one control signal using a PUCCH format 2 / 2a / 2b in the case of a normal CP.
  • FIG. 25 illustrates another example of transmitting two control information as one control signal using the PUCCH format 2 / 2a / 2b in the case of a normal CP.
  • 26 is a block diagram illustrating an apparatus for wireless communication.
  • 27 is a block diagram illustrating an example of a base station.
  • the following techniques include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used for various multiple access schemes.
  • SC-FDMA is a method in which an inverse fast fourier transform (IFFT) is performed on complex fourier transform (DFT) spread complex symbols, also called DFT spread-orthogonal frequency division multiplexing (DFTS-OFDM).
  • IFFT inverse fast fourier transform
  • DFT complex fourier transform
  • DFTS-OFDM DFT spread-orthogonal frequency division multiplexing
  • the following technique may be used for a multiple access scheme, such as clustered SC-FDMA, NxSC-FDMA, which is a variation of SC-FDMA.
  • Clustered SC-FDMA is also referred to as clustered DFTS-OFDM, in which DFT spread complex symbols are divided into a plurality of subblocks, and the plurality of subblocks are distributed in a frequency domain and mapped to subcarriers.
  • N ⁇ SC-FDMA is also called a chunk specific DFTS-OFDM in that a code block is divided into a plurality of chunks, and a DFT and an IFFT are performed in chunks.
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies 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
  • OFDMA may be implemented by a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • E-UTRA Evolved UTRA
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A Advanced is the evolution of 3GPP LTE.
  • FIG. 1 is a block diagram illustrating a wireless communication system.
  • the wireless communication system 10 includes at least one base station 11 (BS).
  • Each base station 11 provides a communication service for a particular geographic area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the user equipment (UE) 12 may be fixed or mobile, and may include a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), It may be called other terms such as a wireless modem and a handheld device.
  • the base station 11 generally refers to a fixed station communicating with the terminal 12, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like. have.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • access point and the like. have.
  • downlink means communication from the base station to the terminal
  • uplink means communication from the terminal to the base station.
  • a transmitter may be part of a base station, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of a base station.
  • Heterogeneous network refers to a network in which a relay station, a femto cell and / or a pico cell is disposed.
  • downlink may mean communication from a base station to a repeater, a femto cell, or a pico cell.
  • the downlink may mean communication from the repeater to the terminal.
  • the downlink may mean communication from the first relay to the second relay.
  • uplink may mean communication from a repeater, a femtocell or a picocell to a base station.
  • the uplink may mean communication from the terminal to the repeater.
  • uplink may mean communication from a second repeater to a first repeater.
  • the wireless communication system may be any one of a multiple input multiple output (MIMO) system, a multiple input single output (MIS) system, a single input single output (SISO) system, and a single input multiple output (SIMO) system.
  • MIMO multiple input multiple output
  • MIS multiple input single output
  • SISO single input single output
  • SIMO single input multiple output
  • the MIMO system uses a plurality of transmit antennas and a plurality of receive antennas.
  • the MISO system uses multiple transmit antennas and one receive antenna.
  • the SISO system uses one transmit antenna and one receive antenna.
  • the SIMO system uses one transmit antenna and multiple receive antennas.
  • the transmit antenna means a physical or logical antenna used to transmit one signal or stream
  • the receive antenna means a physical or logical antenna used to receive one signal or stream.
  • uplink and / or downlink hybrid automatic repeat request may be supported.
  • a channel quality indicator CQI may be used for link adaptation.
  • ACK HARQ acknowledgment
  • NACK not-acknowledgement
  • a terminal receiving downlink data (DL data) from a base station transmits HARQ ACK / NACK after a predetermined time elapses.
  • the downlink data may be transmitted on a physical downlink shared channel (PDSCH) indicated by a physical downlink control channel (PDCCH).
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • HARQ ACK / NACK becomes ACK when the decoding of the downlink data is successful, and NACK when the decoding of the downlink data fails.
  • the base station may retransmit the downlink data until the ACK is received or the maximum number of retransmissions.
  • a transmission time of HARQ ACK / NACK for downlink data, resource allocation information for HARQ ACK / NACK transmission, and the like may be dynamically informed by the base station through signaling.
  • a transmission time of HARQ ACK / NACK, resource allocation information, and the like may be previously reserved according to the transmission time of the downlink data or the resource used for the transmission of the downlink data.
  • FDD frequency division duplex
  • HARQ ACK / NACK for the PDSCH is transmitted through a physical uplink control channel (PUCCH) in subframe n + 4. Can be.
  • PUCCH physical uplink control channel
  • the terminal may measure the downlink channel state and report the CQI to the base station periodically and / or aperiodically.
  • the base station can be used for downlink scheduling using the CQI.
  • the base station may determine the modulation and coding scheme (MCS) used for transmission using the CQI received from the terminal. If it is determined that the channel state is good by using the CQI, the base station can increase the transmission rate by increasing the modulation order (modulation order) or the coding rate (coding rate). If it is determined that the channel state is not good by using the CQI, the base station may lower the transmission rate by lowering the modulation order or the coding rate. If the transmission rate is low, the reception error rate may be reduced.
  • the CQI may indicate a channel state for all bands and / or a channel state for some bands of all bands.
  • the base station may inform the terminal of the time of transmission of CQI or resource allocation information for CQI transmission.
  • the UE may report a precoding matrix indicator (PMI) and a rank indicator (RI) to the base station.
  • PMI indicates the index of the precoding matrix selected in the codebook
  • RI indicates the number of useful transmission layers.
  • CQI is a concept including PMI and RI in addition to CQI.
  • a terminal first sends a scheduling request (SR) to an eNB for uplink transmission.
  • the SR requests that the terminal requests uplink radio resource allocation to the base station.
  • SR may also be called a bandwidth request.
  • SR is a kind of advance information exchange for data exchange.
  • the terminal In order to transmit uplink data to the base station, the terminal first requests radio resource allocation through the SR.
  • the base station may inform the terminal of the SR transmission time or resource allocation information for SR transmission.
  • the SR may be sent periodically.
  • the base station may inform the terminal of the transmission period of the SR.
  • the base station transmits an uplink grant (UL grant) to the terminal in response to the SR.
  • the uplink grant may be transmitted on the PDCCH.
  • the uplink grant includes information on uplink radio resource allocation.
  • the terminal transmits uplink data through the allocated uplink radio resource.
  • the terminal may transmit uplink control information such as HARQ ACK / NACK, CQI and SR at a given transmission time.
  • uplink control information such as HARQ ACK / NACK, CQI and SR
  • the type and size of uplink control information may vary depending on the system, and the technical spirit of the present invention is not limited thereto.
  • a radio frame consists of 10 subframes, and one subframe consists of two slots. Slots in a radio frame are numbered with slots # 0 through # 19. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). TTI may be referred to as a scheduling unit for data transmission. For example, one radio frame may have a length of 10 ms, one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
  • the structure of the radio frame is merely an example, and the number of subframes included in the radio frame or the number of slots included in the subframe may be variously changed.
  • FIG. 5 is an exemplary diagram illustrating a resource grid for one uplink slot in 3GPP LTE.
  • an uplink slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain and includes N UL resource blocks (RBs) in a frequency domain. do.
  • the OFDM symbol is for representing one symbol period.
  • the OFDM symbol may be a multiple access scheme such as OFDMA, SC-FDMA, clustered SC-FDMA, or N ⁇ SC-FDMA.
  • the OFDM symbol may be referred to as an SC-FDMA symbol, an OFDMA symbol, or a symbol interval according to a system.
  • the resource block includes a plurality of subcarriers in the frequency domain.
  • the number N UL of resource blocks included in an uplink slot depends on an uplink transmission bandwidth set in a cell.
  • Each element on the resource grid is called a resource element.
  • Resource elements on the resource grid may be identified by an index pair (k, l) in the slot.
  • an exemplary resource block includes 7 ⁇ 12 resource elements including 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain, but the number of subcarriers and the OFDM symbols in the resource block is equal to this. It is not limited. The number of OFDM symbols or the number of subcarriers included in the resource block may be variously changed.
  • the resource block means a general frequency resource. In other words, if the resource blocks are different, the frequency resources are different.
  • the number of OFDM symbols may change depending on the length of a cyclic prefix (CP). For example, the number of OFDM symbols is 7 for a normal CP and the number of OFDM symbols is 6 for an extended CP.
  • CP cyclic prefix
  • a resource grid for one uplink slot may be applied to a resource grid for a downlink slot.
  • FIG. 6 shows an example of a structure of a downlink subframe in 3GPP LTE.
  • the downlink subframe includes two consecutive slots.
  • the maximum 3 OFDM symbols of the first slot in the downlink subframe are the control region, and the remaining OFDM symbols are the data region.
  • the PDSCH may be allocated to the data area. Downlink data is transmitted on the PDSCH.
  • the downlink data may be a transport block which is a data block for a downlink shared channel (DL-SCH) which is a transport channel transmitted during TTI.
  • the base station may transmit downlink data through one antenna or multiple antennas to the terminal.
  • a base station may transmit one codeword through one antenna or multiple antennas to a terminal, and may transmit two codewords through multiple antennas. That is, up to 2 codewords are supported in 3GPP LTE. Codewords are coded bits in which channel coding is performed on information bits corresponding to information. Modulation may be performed for each codeword.
  • control channels such as a physical control format indicator channel (PCFICH), a physical HARQ indicator channel (PHICH), and a PDCCH may be allocated.
  • PCFICH physical control format indicator channel
  • PHICH physical HARQ indicator channel
  • PDCCH Physical Downlink Control Channel
  • the PCFICH carries information on the number of OFDM symbols used for transmission of PDCCHs in a subframe.
  • the control region includes 3 OFDM symbols.
  • the PHICH carries HARQ ACK / NACK for uplink transmission.
  • the control region consists of a set of a plurality of control channel elements (CCE). If the total number of CCEs constituting the CCE set in the downlink subframe is N (CCE), the CCE is indexed from 0 to N (CCE) -1.
  • the CCE corresponds to a plurality of resource element groups. Resource element groups are used to define control channel mappings to resource elements. One resource element group is composed of a plurality of resource elements.
  • the PDCCH is transmitted on an aggregation of one or several consecutive CCEs. A plurality of PDCCHs may be transmitted in the control region.
  • the PDCCH carries downlink control information such as downlink scheduling information, uplink scheduling information, or uplink power control command.
  • the base station transmits downlink data to the terminal on the PDSCH in the subframe
  • the base station carries downlink control information used for scheduling of the PDSCH on the PDCCH in the subframe.
  • the UE may read downlink data transmitted on a PDSCH by decoding the downlink control information.
  • FIG. 7 shows an example of a structure of an uplink subframe in 3GPP LTE.
  • an uplink subframe may be divided into a control region to which a PUCCH carrying uplink control information is allocated and a data region to which a physical uplink shared channel (PUSCH) carrying uplink data is allocated.
  • PUSCH physical uplink shared channel
  • PUCCH for one UE is allocated to an RB pair in a subframe.
  • Resource blocks belonging to a resource block pair occupy different subcarriers in each of a first slot and a second slot.
  • the frequency occupied by RBs belonging to the RB pair allocated to the PUCCH is changed based on a slot boundary. That is, the RBs allocated to the PUCCH are hopped at a slot level.
  • resource block hopping at the slot level is called frequency hopping.
  • m is a location index indicating a logical frequency domain location of a resource block pair allocated to a PUCCH in a subframe.
  • the PUSCH is mapped to an uplink shared channel (UL-SCH) which is a transport channel.
  • the uplink control information transmitted on the PUCCH includes HARQ ACK / NACK, CQI indicating a downlink channel state, SR which is an uplink radio resource allocation request.
  • PUCCH may support multiple formats. That is, uplink control information having a different number of bits per subframe may be transmitted according to a modulation scheme dependent on the application of the PUCCH format.
  • the following table shows an example of a modulation scheme and the number of bits per subframe according to the PUCCH format.
  • PUCCH format 1 is used for transmission of SR
  • PUCCH format 1a / 1b is used for transmission of HARQ ACK / NACK
  • PUCCH format 2 is used for transmission of CQI
  • PUCCH format 2a / 2b is used for transmission of CQI and HARQ ACK / NACK. Used.
  • PUCCH format 1a / 1b When HARQ ACK / NACK is transmitted alone in any subframe, PUCCH format 1a / 1b is used, and when SR is transmitted alone, PUCCH format 1 is used.
  • the UE may simultaneously transmit HARQ ACK / NACK and SR in the same subframe. For positive SR transmission, the UE transmits HARQ ACK / NACK through PUCCH resources allocated for SR, and for negative SR transmission, UE transmits HARQ through PUCCH resources allocated for ACK / NACK. Send ACK / NACK.
  • Control information transmitted on the PUCCH may use a cyclically shifted sequence.
  • the cyclically shifted sequence may be generated by cyclically shifting a base sequence by a specific cyclic shift amount.
  • the specific CS amount is indicated by the cyclic shift index (CS index).
  • Various kinds of sequences can be used as the base sequence.
  • a well-known sequence such as a pseudo-random (PN) sequence or a Zadoff-Chu (ZC) sequence may be used as the base sequence.
  • ZC Zadoff-Chu
  • CAZAC computer generated constant amplitude zero auto-correlation
  • the following equation is an example of a basic sequence.
  • i ⁇ ⁇ 0,1, ..., 29 ⁇ is the root index
  • n the element index
  • 0 ⁇ n ⁇ N-1 N is the length of the base sequence.
  • i may be determined by a cell ID, a slot number in a radio frame, or the like.
  • N may be 12.
  • Different base sequences define different base sequences.
  • b (n) may be defined as shown in the following table.
  • the cyclically shifted sequence r (n, Ics) may be generated by circularly shifting the basic sequence r (n) as shown in the following equation.
  • Ics is a cyclic shift index indicating the amount of CS (0 ⁇ Ics ⁇ N-1, and Ics is an integer).
  • the available cyclic shift index of the base sequence refers to a cyclic shift index derived from the base sequence according to the CS interval (CS interval). For example, if the length of the base sequence is 12 and the CS interval is 1, the total number of available cyclic shift indices of the base sequence is 12. Alternatively, if the length of the base sequence is 12 and the CS interval is 2, the total number of available cyclic shift indices of the base sequence is six.
  • the CS interval may be determined in consideration of delay spread.
  • FIG. 8 illustrates an example of PUCCH format 1 / 1a / 1b transmission in the case of a normal CP. This shows a resource block pair allocated to the first slot and the second slot in one subframe.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 7 OFDM symbols.
  • RS reference signal
  • the RS is carried in three contiguous OFDM symbols in the middle of each slot. In this case, the number and position of symbols used for the RS may vary, and the number and position of symbols used for the control information may also change accordingly.
  • PUCCH formats 1, 1a and 1b each use one complex-valued symbol d (0).
  • the complex symbol d (0) for the PUCCH format 1a is a modulation symbol generated by binary bit shift keying (BPSK) modulation of 1-bit HARQ ACK / NACK information.
  • BPSK binary bit shift keying
  • the complex symbol d (0) for PUCCH format 1b is a modulation symbol generated by quadrature phase shift keying (QPSK) modulation of 2 bits of HARQ ACK / NACK information.
  • PUCCH format 1a is for HARQ ACK / NACK information for one codeword
  • PUCCH format 1b is for HARQ ACK / NACK information for two codewords.
  • the following table shows examples of modulation symbols to which HARQ ACK / NACK information bits are mapped according to a modulation scheme.
  • a modulated sequence s (n) is generated using the complex symbol d (0) for the PUCCH format 1 / 1a / 1b and the cyclically shifted sequence r (n, Ics).
  • a modulated sequence s (n) may be generated by multiplying a cyclically shifted sequence r (n, Ics) by a complex symbol d (0) as shown in the following equation.
  • Ics which is a cyclic shift index of the cyclically shifted sequence r (n, Ics)
  • CS hopping may be performed according to the slot number n s in the radio frame and the symbol index l in the slot. Therefore, the cyclic shift index Ics may be expressed as Ics (n s , L).
  • CS hopping may be performed cell-specific to randomize inter-cell interference.
  • the modulated sequence s (n) may be spread using an orthogonal sequence.
  • the terminal multiplexing capacity is the number of terminals that can be multiplexed on the same resource block.
  • Elements constituting the orthogonal sequence correspond to 1: 1 in OFDM symbols carrying control information in order.
  • Each of the elements constituting the orthogonal sequence is multiplied by a modulated sequence s (n) carried in a corresponding OFDM symbol to generate a spread sequence.
  • the spread sequence is mapped to a resource block pair allocated to the PUCCH in the subframe.
  • an IFFT is performed for each OFDM symbol of the subframe to output a time domain signal for control information.
  • the orthogonal sequence is multiplied before the IFFT is performed, but the same result can be obtained even if the orthogonal sequence is multiplied after the IFFT for the modulated sequence s (n).
  • one OFDM symbol on the PUCCH is punctured.
  • the last OFDM symbol of the subframe may be punctured.
  • control information is carried in 4 OFDM symbols in the first slot of the subframe, and control information is carried in 3 OFDM symbols in the second slot of the subframe.
  • Orthogonal sequence index Ios may be hopped to slot level starting from allocated resources.
  • hopping of an orthogonal sequence index of a slot level is referred to as orthogonal sequence remapping.
  • Orthogonal sequence remapping may be performed according to the slot number n s in the radio frame. Therefore, the orthogonal sequence index Ios may be represented by Ios (n s ). Orthogonal sequence remapping may be performed for randomization of intercell interference.
  • the modulated sequence s (n) can be scrambled in addition to spreading using an orthogonal sequence.
  • the modulated sequence s (n) may be multiplied by 1 or j depending on the particular parameter.
  • the RS may be generated using a cyclically shifted sequence and an orthogonal sequence generated from the same basic sequence as the control information.
  • FIG. 9 shows an example of PUCCH format 1 / 1a / 1b transmission in case of an extended CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 6 OFDM symbols.
  • An orthogonal sequence w Ios (k) having a spreading coefficient K 2 (Ios is an orthogonal sequence index, k is an element index of an orthogonal sequence, and 0 ⁇ k ⁇ K-1) may use a sequence as shown in the following table.
  • the terminal multiplexing capacity is as follows. Since the number of Ics for the control information is 6 and the number of Ios is 3, 18 terminals may be multiplexed per resource block. However, since the number of I'cs for RS is 6 and the number of I'os is 2, 12 UEs can be multiplexed per resource block. Therefore, the terminal multiplexing capacity is limited by the RS part rather than the control information part.
  • FIG. 10 shows an example of PUCCH format 2 / 2a / 2b transmission in case of normal CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • RS is carried on 2 OFDM symbols among 7 OFDM symbols included in each slot, and CQI is carried on the remaining 5 OFDM symbols.
  • the number and position of symbols used for the RS may vary, and the number and position of symbols used for the CQI may change accordingly.
  • the terminal performs channel coding on the CQI information bits to generate encoded CQI bits.
  • a block code may be used.
  • An example of a block code is the Reed-Muller code family.
  • A is the size of the CQI information bits. That is, in 3GPP LTE, 20 bits of encoded CQI bits are always generated regardless of the size of CQI information bits.
  • the following table shows an example of 13 basis sequences for the (20, A) block code.
  • n is the base sequence (0 ⁇ n ⁇ 12, n is an integer).
  • the coded CQI bits are generated with a linear combination of 13 basis sequences.
  • the following equation shows an example of the coded CQI bit b i (0 ⁇ i ⁇ 19, i is an integer).
  • a 0 , a 1 , ..., a A-1 is the CQI information bits, and A is the size of the CQI information bits (A is a natural number).
  • the CQI information bit may include one or more fields.
  • a CQI field indicating a CQI index for determining an MCS a precoding matrix indication (PMI) field indicating an index of a precoding matrix selected from a codebook, a rank indication (RI) field indicating a rank, and the like are CQI information bits. Can be included.
  • the following table shows an example of a field included in the CQI information bit and the bit size of the field.
  • the CQI information bit may include only a wideband CQI field having a size of 4 bits. At this time, the size A of the CQI information bit is four.
  • the wideband CQI field indicates the CQI index for the entire band.
  • the following table shows another example of a field included in the CQI information bit and the bit size of the field.
  • the CQI information bit may include a wideband CQI field, a spatial differential CQI field, and a PMI field.
  • the spatial difference CQI field indicates the difference between the CQI index for the full band for the first codeword and the CQI index for the full band for the second codeword.
  • the following table shows another example of a field included in the CQI information bit and a bit size of the field.
  • the 20-bit encoded CQI bit may be scrambled by a UE-specific scrambling sequence to generate a 20-bit scrambled bit.
  • the 20-bit scrambled bit is mapped to 10 modulation symbols d (0), ..., d (9) via QPSK.
  • PUCCH format 2a one bit of HARQ ACK / NACK information is mapped to one modulation symbol d (10) through BPSK modulation.
  • PUCCH format 2b two bits of HARQ ACK / NACK information are mapped to one modulation symbol d (10) through QPSK modulation. That is, in PUCCH format 2a, CQI and 1-bit HARQ ACK / NACK information are simultaneously transmitted.
  • PUCCH format 2b CQI and 2-bit HARQ ACK / NACK information are simultaneously transmitted.
  • d (10) is used for RS generation.
  • d (10) corresponds to one OFDM symbol of 2 OFDM symbols carrying an RS in each slot.
  • phase modulation is performed on the RS carried in the one OFDM symbol in each slot according to the corresponding d (10).
  • PUCCH format 2a / 2b may be supported only for a normal CP. As such, in PUCCH formats 2a and 2b, one modulation symbol is used for RS generation.
  • the cyclic shift index Ics of the cyclically shifted sequence r (n, Ics) may vary according to the slot number n s in the radio frame and the symbol index l in the slot. Therefore, the cyclic shift index Ics may be expressed as Ics (n s , L).
  • the RS may use a cyclically shifted sequence generated from the same basic sequence as the control information.
  • PUCCH format 2 / 2a / 2b does not use orthogonal sequences unlike PUCCH format 1 / 1a / 1b.
  • FIG. 11 shows an example of PUCCH format 2 / 2a / 2b transmission in case of an extended CP.
  • resource blocks belonging to a resource block pair are expressed as occupying the same frequency band in the first slot and the second slot, the resource blocks may be hopped to the slot level as described with reference to FIG. 7.
  • each of the first slot and the second slot includes 6 OFDM symbols.
  • RS is carried on 1 OFDM symbol among 6 OFDM symbols of each slot, and control information is carried on the remaining 5 OFDM symbols. Except for this, the example of the normal CP of FIG. 10 is applied as it is.
  • the following information is required for PUCCH format 2/2 / a / 2b transmission.
  • Subcarriers (or resource blocks) to which control information is transmitted, cyclic shift index Ics for control information, and cyclic shift index I'cs for RS are required.
  • the CS interval is 1, the number of Ics for the control information and the I'cs for the RS are 12, respectively, and 12 terminals may be multiplexed per resource block.
  • the CS interval is 2
  • the number of Ics for the control information and the I'cs for the RS are 6, respectively, and six terminals may be multiplexed per resource block.
  • FIG. 12 is a flowchart illustrating an example of an information transmission method.
  • the terminal acquires a resource index (S11).
  • the terminal processes the information based on the resource index (S12).
  • the terminal transmits information to the base station (S13).
  • a plurality of terminals in the cell may simultaneously transmit their information to the base station. At this time, if each terminal uses a different resource, the base station can distinguish the information for each terminal.
  • the information may be control information, user data, information in which various control information are mixed, or information in which control information and user data are multiplexed.
  • the resource may include at least one of a resource block, a frequency domain sequence, and a time domain sequence.
  • Resource blocks are frequency resources over which information is transmitted.
  • the frequency domain sequence is used to spread the symbols corresponding to the information into the frequency domain.
  • the time domain sequence is used to spread the symbol into the time domain. If the resource includes a frequency domain sequence and a time domain sequence, the frequency domain sequence and the time domain sequence are used to spread the symbol into a two-dimensional time-frequency domain (frequency domain and time domain).
  • the resource index identifies a resource used for transmitting information.
  • the resource index may include at least one of resource block information, a frequency domain sequence index, and a time domain sequence index.
  • Resource block information indicates a resource block
  • a frequency domain sequence index indicates a frequency domain sequence
  • a time domain sequence index indicates a time domain sequence.
  • the resource index may include resource block information and a frequency domain sequence index.
  • the sequence may be selected from a sequence set having a plurality of sequences as elements.
  • the plurality of sequences included in the sequence set may be orthogonal to each other or may have low correlation with each other.
  • the resource index may include a sequence index.
  • the sequence may be generated based on the sequence index.
  • the sequence is a frequency domain sequence and / or a time domain sequence.
  • the sequence index may indicate one sequence selected from the sequence set.
  • Each sequence belonging to the sequence set may correspond one-to-one to one sequence index.
  • the sequence index indicates an amount of cyclic shift
  • the sequence may be generated by cyclically shifting a base sequence by the cyclic shift amount.
  • the time-domain sequence is one orthogonal sequence selected from a set of orthogonal sequences
  • the frequency-domain sequence is a cyclic shifted sequence generated by cyclically shifting the base sequence by a cyclic shift amount.
  • the time domain sequence index may be an orthogonal sequence index indicating an orthogonal sequence
  • the frequency domain sequence index may be a cyclic shift index indicating an cyclic shift amount.
  • this is merely an example and does not limit the time domain sequence and / or the frequency domain sequence.
  • a resource consists of a combination of (1) CS amount, (2) orthogonal sequence, and (3) resource block.
  • a resource consists of a combination of (1) CS amount and (2) resource block.
  • the cyclic shift index and the resource block are determined from the resource index.
  • the orthogonal sequence index is also determined from the resource index.
  • the position index m representing the logical frequency domain position of the RB pair allocated to the PUCCH in the subframe may be determined from the resource index.
  • FIG. 13 is a flowchart illustrating another example of an information transmission method.
  • the base station transmits a resource index to the terminal (S21).
  • the terminal processes the information based on the resource index (S22).
  • the terminal transmits information to the base station (23).
  • the base station may explicitly inform the terminal of the resource index.
  • the resource index may be set by higher layer signaling.
  • the upper layer of the physical layer may be a radio resource control (RRC) layer that controls radio resources between the terminal and the network.
  • the information transmitted by the terminal may be SR, semi-persistent scheduling (SPS) ACK / NACK, CQI, or the like.
  • SPS ACK / NACK is HARQ ACK / NACK for downlink data transmitted by semi-static scheduling.
  • a PDCCH corresponding to the PDSCH may not exist.
  • FIG. 14 is a flowchart illustrating still another example of an information transmission method.
  • the base station transmits downlink data to the terminal (S31).
  • the terminal acquires a resource index (S32).
  • the resource index may be obtained from a radio resource through which a control channel for receiving downlink data is transmitted.
  • the terminal processes the information based on the resource index (S33).
  • the terminal transmits information to the base station (S34).
  • the base station may implicitly inform the terminal of the resource index.
  • the information transmitted by the terminal may be dynamic ACK / NACK.
  • Dynamic ACK / NACK is ACK / NACK for downlink data transmitted by dynamic scheduling. In dynamic scheduling, whenever a base station transmits downlink data through a PDSCH, a downlink grant is transmitted to the user equipment through a PDCCH each time.
  • the following equation is an example of determining a resource index (In) for dynamic ACK / NACK transmission.
  • n (CCE) is the first CCE index used for PDCCH transmission for the PDSCH
  • N (1) PUCCH is the number of resource indexes allocated for SR and SPS ACK / NACK.
  • N (1) PUCCH may be set by a higher layer such as an RRC layer.
  • the base station may adjust resources for ACK / NACK transmission by adjusting the first CCE index used for PDCCH transmission.
  • 15 is a flowchart illustrating an example of an information processing method based on a resource index.
  • the terminal determines a cyclic shift index based on the resource index (S41).
  • the terminal generates a cyclically shifted sequence on the basis of the cyclic shift index (S42).
  • the cyclically shifted sequence can be generated by cyclically shifting the base sequence by the amount of cyclic shift obtained from the cyclic shift index.
  • the terminal generates a modulated sequence based on the cyclically shifted sequence and symbols for information (S43).
  • the terminal maps the modulated sequence to the resource block (S44). Resource blocks may be determined based on resource indexes.
  • the terminal transmits the modulated sequence. In this case, the information transmitted by the terminal may be a CQI.
  • 16 is a flowchart illustrating another example of an information processing method based on a resource index.
  • the terminal determines an orthogonal sequence index and a cyclic shift index based on the resource index (S51).
  • the terminal generates a cyclically shifted sequence based on the cyclic shift index (S52).
  • the terminal generates a modulated sequence based on a cyclically shifted sequence and symbols for information (S53).
  • the terminal generates a spread sequence from the modulated sequence based on the orthogonal sequence index (S54).
  • the terminal maps the spread sequence to the resource block (S55). Resource blocks may be determined based on resource indexes.
  • the terminal transmits the spread sequence.
  • the information transmitted by the terminal may be SR, HARQ ACK / NACK.
  • Adjacent spectral and / or non-adjacent spectral aggregation may be used in a multi-carrier system, and either symmetric or asymmetric aggregation may be used.
  • the case where the number of downlink carriers and the number of uplink carriers are the same is called symmetric aggregation, and when the number is different, it is called asymmetric aggregation.
  • the size (ie bandwidth) of the multiple carriers may be different.
  • 5 MHz carrier (carrier # 0) + 20 MHz carrier (carrier # 1) + 20 MHz carrier (carrier # 2) + 20 MHz carrier (carrier # 3) It may be configured as a + 5MHz carrier (carrier # 4).
  • each subblock may correspond to one carrier.
  • each chunk may correspond to one carrier.
  • this is for illustrative purposes only and does not limit the multiple access scheme used in the multi-carrier system.
  • duplex scheme in a multi-carrier system, and an FDD or a time division duplex (TDD) scheme may be adopted.
  • FIG. 17 shows an example of a linking method between a downlink carrier and an uplink carrier in a symmetric aggregation multicarrier system.
  • the number of downlink carriers is two, and the number of uplink carriers is two.
  • the first downlink carrier (1st DL carrier) is associated with the first uplink carrier (1st UL carrier)
  • the second downlink carrier (2nd DL carrier) is associated with the second uplink carrier (2nd UL carrier).
  • Control information for the downlink carrier is transmitted through an uplink carrier associated with the downlink carrier.
  • Control information for the downlink carrier includes a CQI for the downlink carrier, HARQ ACK / NACK for the data transmitted through the downlink carrier.
  • the number of downlink carriers, the number of uplink carriers, and the like in the multi-carrier system may be variously changed.
  • 18 is a flowchart illustrating an example of a method for transmitting control information in a multi-carrier system.
  • the terminal acquires a first resource index and a second resource index (S110).
  • the terminal transmits first control information to the base station based on the first resource index (S120).
  • the terminal transmits the second control information to the base station based on the second resource index (S130).
  • the first resource index is a resource index for transmitting the first control information
  • the second resource index is a resource index for transmitting the second control information.
  • the first resource index may be for the first downlink carrier
  • the second resource index may be for the second downlink carrier.
  • the first control information may be transmitted through the first uplink carrier
  • the second control information may be transmitted through the second uplink carrier.
  • the first resource index and the second resource index are different from each other.
  • the control information transmission method of FIG. 18 may be extended to three or more downlink carriers. That is, each of the plurality of downlink carriers may be associated with different uplink carriers. In this case, the base station allocates different resource indexes to each of the plurality of downlink carriers. In order to be linked to different uplink carriers for each of the plurality of downlink carriers, the number of downlink carriers and the number of uplink carriers in the multi-carrier system must be the same, or the number of downlink carriers must be less than the number of uplink carriers.
  • the control information transmission method is a problem.
  • a method of transmitting a plurality of control information as a single control signal through a limited radio resource may be applied to a multiple codeword system as well as a multicarrier system.
  • the representative control information is one control information representing a plurality of control information. Representing a plurality of control information as one representative control information is referred to as control information bundling.
  • Representative control information includes a representative CQI, a representative ACK / NACK.
  • the representative CQI may be one CQI for a plurality of downlink carriers.
  • the representative CQI may be an average CQI of respective CQIs for a plurality of downlink carriers.
  • the representative CQI may be one CQI representing respective CQIs for a plurality of codewords.
  • the representative ACK / NACK may be one HARQ ACK / NACK for each data transmitted through a plurality of downlink carriers. For example, when the decoding of each data transmitted through the plurality of downlink carriers is all successful, the representative ACK / NACK is ACK, otherwise the representative ACK / NACK is NACK.
  • the representative ACK / NACK may be one HARQ ACK / NACK representing each ACK / NACK for a plurality of codewords.
  • a control information bundling mode In order to transmit the plurality of control information as representative control information, a control information bundling mode should be set. In addition, both the base station and the terminal should be aware of a plurality of control information to be combined with the representative control information.
  • the base station may inform the terminal whether the control information bundle mode is set or a plurality of control information to be bundled with the representative control information through signaling. However, when the base station and the terminal share the information on the control information bundle mode through the signaling, the signaling overhead may increase. For example, it is assumed that the control information to be transmitted by the terminal is M (M is a natural number of 2 or more), and N (N ⁇ M, N is a natural number) of M control information are bundled and transmitted as representative control information. .
  • the selection of N control information out of M control information may occur in a very large number of cases, and may increase signaling overhead. Accordingly, there is a need for a method in which a base station and a terminal can easily share information on a control information bundle mode.
  • 19 is a flowchart illustrating a representative control information transmission method according to an embodiment of the present invention.
  • the terminal acquires a first resource index and a second resource index (S210).
  • the first resource index and the second resource index are the same.
  • the terminal may recognize that the control information bundle mode is set.
  • the terminal transmits the representative control information to the base station based on the first resource index (S220). Accordingly, when the base station wants to set the control information bundle mode, the base station allocates the first resource index and the second resource index in the same manner, and when the base station does not set the control information bundle mode, the first resource index and the second resource index You can assign differently. If the first resource index and the second resource index are the same, the terminal may transmit the representative control information based on the index corresponding to any one of the two resource index.
  • the representative control information may be representative CQI or representative ACK / NACK.
  • the representative CQI may be an average CQI of the CQI for the first downlink carrier and the CQI for the second downlink carrier.
  • the representative CQI may be a CQI, which is a worst case of the CQI for the first downlink carrier and the CQI for the second downlink carrier.
  • the representative CQI may be a CQI, which is a best case of the CQI for the first downlink carrier and the CQI for the second downlink carrier.
  • the representative ACK / NACK is HARQ ACK / NACK for the first data transmitted on the first downlink carrier and the second data transmitted on the second downlink carrier. For example, if both decoding on the first data and decoding on the second data are successful, the representative ACK / NACK becomes an ACK. If at least one of decoding on the first data and decoding on the second data fails, the representative ACK / NACK becomes NACK.
  • 20 shows an example of an association method between a downlink carrier and an uplink carrier in a multi-carrier system having a number of downlink carriers to uplink carriers 2: 1.
  • a first downlink carrier and a second downlink carrier are respectively associated with a first uplink carrier.
  • the base station may allocate the first resource index for the first downlink carrier and the second resource index for the second downlink carrier in the same manner.
  • the UE may transmit representative control information for the first downlink carrier and the second downlink carrier on the first uplink carrier to the base station based on the first resource index.
  • FIG. 21 shows an example of an association method between a downlink carrier and an uplink carrier in a multicarrier system having a number of downlink carriers to uplink carriers of 3 to 2.
  • a first downlink carrier (1st DL carrier) is associated with a first uplink carrier (1st UL carrier).
  • the second downlink carrier (2nd DL carrier) and the third downlink carrier (3rd DL carrier) are respectively associated with the second uplink carrier (2nd UL carrier).
  • the base station may equally allocate the second resource index for the second downlink carrier and the third resource index for the third downlink carrier. In this case, the first resource index for the first downlink carrier may be allocated differently from the second resource index.
  • the terminal may transmit the first control information for the first downlink carrier to the base station through the first uplink carrier based on the first resource index.
  • the terminal may transmit representative control information for the second downlink carrier and the third downlink carrier to the base station through the second uplink carrier.
  • the first control information and the representative control information are transmitted through different resources, respectively.
  • the first control information and the representative control information may be transmitted at the same time.
  • the control information bundle mode may be applied regardless of the number of downlink carriers and the number of uplink carriers. Not only when the number of downlink carriers is greater than the number of uplink carriers, but also when the number of downlink carriers and the number of uplink carriers is the same, or when the number of downlink carriers is less than the number of uplink carriers. Limited radio resources can be efficiently utilized through the control information bundle mode.
  • the control information bundle mode may also be applied to transmission of representative control information for multiple codewords.
  • 22 is a flowchart illustrating a method of transmitting control information according to another embodiment of the present invention.
  • the terminal acquires a first resource index and a second resource index (S310).
  • the terminal transmits the first control information to the base station based on the first resource index through the first slot in the subframe (S320).
  • the terminal transmits the second control information to the base station based on the second resource index through the second slot in the subframe (S330).
  • the first control information and the second control information may be ACK / NACK, respectively.
  • the first control information is a first ACK / NACK for the first data transmitted through the first downlink carrier
  • the second control information is a second ACK / NACK for the second data transmitted through the second downlink carrier Can be.
  • the first control information and the second control information may be CQIs, respectively.
  • the first control information may be a first CQI for a first downlink carrier
  • the second control information may be a second CQI for a second downlink carrier.
  • FIG. 23 illustrates an example of transmitting two control information as one control signal using a PUCCH format 1 / 1a / 1b in the case of a normal CP.
  • first control information is transmitted through a first slot in one subframe
  • second control information is transmitted through a second slot.
  • One complex symbol for the first control information is d 1 (0) and one complex symbol for the second control information is d 2 (0).
  • d 1 (0) and d 2 (0) may be generated by HARPS ACK / NACK of 1 bit, respectively, by BPSK modulation.
  • the UE may transmit two bits of HARQ ACK / NACK through one subframe.
  • d 1 (0) and d 2 (0) may be generated by QPSK modulation of 2 bits of HARQ ACK / NACK, respectively.
  • the UE may transmit 4 bits of HARQ ACK / NACK through one subframe. That is, the UE may transmit HARQ ACK / NACK information for 4 codewords through one subframe.
  • the terminal may determine the first cyclic shift index, the first orthogonal sequence index, and the first resource block based on the first resource index. In addition, the terminal may determine the second cyclic shift index, the second orthogonal sequence index, and the second resource block based on the second resource index.
  • the terminal generates a first orthogonal sequence [w 1 (0), w 1 (1), w 1 (2), w 1 (3)] from the first orthogonal sequence index, and the second orthogonal sequence from the second orthogonal sequence index.
  • the sequence [w 2 (0), w 2 (1), w 2 (2), w 2 (3)] can be generated.
  • the terminal generates a first cyclically shifted sequence r (n, Ics 1 ) from the first cyclic shift index Ics 1 and generates a second cyclically shifted sequence r (n, Ics 2 ) from the second cyclic shift index Ics 2 . can do.
  • the terminal may determine a first resource block to transmit first control information in the first slot from the first resource index, and determine a second resource block to transmit second control information in the second slot from the second resource index.
  • the first resource index and the second resource index may be the same. Even when the first resource index and the second resource index are the same, the orthogonal sequence index may vary in slot units, and the cyclic shift index may vary in OFDM symbol units. Therefore, different control information may be transmitted for each slot. If the first resource index and the second resource index are different, additional signaling is required.
  • FIG. 24 illustrates an example of transmitting two control information as one control signal using a PUCCH format 2 / 2a / 2b in the case of a normal CP.
  • first control information is transmitted through a first slot in one subframe
  • second control information is transmitted through a second slot.
  • the five complex symbols for the first control information are d 1 (0), d 1 (1), d 1 (2), d 1 (3), d 1 (4), and one complex for the second control information.
  • the symbols are d 2 (0), d 2 (2), d 2 (2), d 2 (3), and d 2 (4).
  • Five complex symbols for each control information may be generated by performing 16QAM modulation on a 20-bit encoded CQI. In this case, the UE may transmit 40-bit encoded CQI through one subframe.
  • the 5 complex symbols for each control information may be generated by QPSK modulation of 10-bit encoded CQI.
  • 10-bit encoded CQI bits can be obtained.
  • the number of CQI information bits can be maintained since 10-bit encoded CQI bits can always be obtained regardless of the size of the CQI information bits.
  • the block code must be changed, but a modulation order can be maintained.
  • the number of CQI information bits and the number of encoded CQI bits may be reduced together. For example, suppose that when one control information is transmitted through one subframe, 20 bits of encoded CQI bits are generated by channel coding 10 bits of CQI information bits.
  • the CQI information bit may be reduced to 5 bits, and 10 bits of encoded CQI bits may be generated. At this time, 10-bit CQI information bits of 1024 levels are compressed into 5-bit CQI information bits of 32 levels.
  • FIG. 25 illustrates another example of transmitting two control information as one control signal using the PUCCH format 2 / 2a / 2b in the case of a normal CP.
  • five complex symbols for the first control information are d 1 (0), d 1 (1), d 1 (2), d 1 (3), and d 1 (4), and the second control.
  • One complex symbol for information is d 2 (0), d 2 (2), d 2 (2), d 2 (3), d 2 (4).
  • the first control information is transmitted through OFDM symbols having a symbol index (l) of 0, 3, 6 in a first slot and OFDM symbols having a symbol index (l) of 2, 4 in a second slot.
  • the second control information is transmitted through OFDM symbols having a symbol index (l) of 2 and 4 in a first slot and OFDM symbols having a symbol index (l) of 0, 3 and 6 in a second slot. That is, the first control information and the second control information are transmitted to the OFDM symbols other than the OFDM symbol in which the RS in the subframe is transmitted.
  • an efficient control information transmission method can be provided in a wireless communication system.
  • a method of efficiently transmitting control information while maintaining compatibility with a single carrier system in a multicarrier system may be provided.
  • multiple control information can be transmitted through a fixed radio resource.
  • limited radio resources can be utilized efficiently and overall system performance can be improved.
  • the apparatus 50 for wireless communication may be part of a terminal.
  • the device 50 for wireless communication includes a processor 51, a memory 52, an RF unit 53, a display unit 54, a user interface unit, 55).
  • the RF unit 53 is connected to the processor 51 and transmits and / or receives a radio signal.
  • the memory 52 is connected with the processor 51 to store driving systems, applications, and general files.
  • the display unit 54 displays various information of the terminal, and may use well-known elements such as liquid crystal display (LCD) and organic light emitting diodes (OLED).
  • the user interface unit 55 may be a combination of a well-known user interface such as a keypad or a touch screen.
  • the processor 51 performs all the methods related to the control information processing and transmission described above so far.
  • the base station 60 includes a processor 61, a memory 62, a scheduler 63, and an RF unit 64.
  • the RF unit 64 is connected to the processor 61 and transmits and / or receives a radio signal.
  • the processor 61 may perform all the methods related to the above-described information transmission so far.
  • the memory 62 is connected to the processor 61 and stores information processed by the processor 61.
  • the scheduler 63 may be connected to the processor 61 and perform all methods related to scheduling for transmission of control information, such as the resource index allocation described above.
  • an efficient control information transmission method and apparatus can be provided in a wireless communication system.
  • a processor such as a microprocessor, a controller, a microcontroller, an application specific integrated circuit (ASIC), or the like according to software or program code coded to perform the function.
  • ASIC application specific integrated circuit

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour la transmission d'information de commande dans un système de radiocommunication. Le procédé comprend les étapes suivantes : l'acquisition d'un premier index de ressources et d'un second index des ressources, le premier index des ressources et le second index de ressources étant mutuellement identiques, et la transmission d'information de commande représentative sur la base du premier index des ressources.
PCT/KR2009/004481 2008-08-11 2009-08-11 Procédé et appareil pour la transmission d’information de commande dans un système de radiocommunication Ceased WO2010018981A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US8773708P 2008-08-11 2008-08-11
US61/087,737 2008-08-11
US11847208P 2008-11-27 2008-11-27
US61/118,472 2008-11-27
KR1020090041280A KR20100019946A (ko) 2008-08-11 2009-05-12 무선 통신 시스템에서 제어정보 전송 방법
KR10-2009-0041280 2009-05-12

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WO2010018981A2 true WO2010018981A2 (fr) 2010-02-18
WO2010018981A3 WO2010018981A3 (fr) 2010-05-14

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WO2011126239A3 (fr) * 2010-04-05 2012-01-05 엘지전자 주식회사 Procédé et dispositif de transmission d'informations de commande dans un système de communication sans fil method and apparatus for transmitting control information in wireless communication system
CN107295665A (zh) * 2016-03-31 2017-10-24 中兴通讯股份有限公司 一种上行控制信号传输方法及装置、用户终端
KR101835322B1 (ko) * 2010-04-08 2018-03-07 엘지전자 주식회사 무선 통신 시스템에서 상향링크 제어 정보 송수신 방법 및 장치
CN112019316A (zh) * 2016-11-03 2020-12-01 Oppo广东移动通信有限公司 传输上行控制信息的方法、装置、网络设备及存储介质

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KR100800795B1 (ko) * 2004-05-31 2008-02-04 삼성전자주식회사 통신 시스템에서 상향 링크 응답 정보 송/수신 방법 및 장치
US20070171849A1 (en) * 2006-01-03 2007-07-26 Interdigital Technology Corporation Scheduling channel quality indicator and acknowledgement/negative acknowledgement feedback
KR100918729B1 (ko) * 2006-01-09 2009-09-24 삼성전자주식회사 단반송파 주파수 분할 다중 접속 시스템에서 역방향 제어정보와 데이터의 시간적 다중화 방법 및 장치
KR101345505B1 (ko) * 2007-02-06 2013-12-27 삼성전자주식회사 무선통신 시스템에서 상향링크 제어채널의 송수신 방법 및장치

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011126239A3 (fr) * 2010-04-05 2012-01-05 엘지전자 주식회사 Procédé et dispositif de transmission d'informations de commande dans un système de communication sans fil method and apparatus for transmitting control information in wireless communication system
US8885591B2 (en) 2010-04-05 2014-11-11 Lg Electronics Inc. Method and apparatus for transmitting control information in wireless communication system
US9282550B2 (en) 2010-04-05 2016-03-08 Lg Electronics Inc. Method and apparatus for transmitting control information in wireless communication system
US9301290B2 (en) 2010-04-05 2016-03-29 Lg Electronics Inc. Method and apparatus for transmitting control information in wireless communication system
US9544886B2 (en) 2010-04-05 2017-01-10 Lg Electronics Inc. Method and apparatus for transmitting control information in wireless communication system
KR101835322B1 (ko) * 2010-04-08 2018-03-07 엘지전자 주식회사 무선 통신 시스템에서 상향링크 제어 정보 송수신 방법 및 장치
CN107295665A (zh) * 2016-03-31 2017-10-24 中兴通讯股份有限公司 一种上行控制信号传输方法及装置、用户终端
CN112019316A (zh) * 2016-11-03 2020-12-01 Oppo广东移动通信有限公司 传输上行控制信息的方法、装置、网络设备及存储介质
CN112019316B (zh) * 2016-11-03 2022-09-02 Oppo广东移动通信有限公司 传输上行控制信息的方法、装置、网络设备及存储介质
US12127204B2 (en) 2016-11-03 2024-10-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Uplink control information transmission method, terminal device, and network device

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