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WO2011155754A2 - Procédé et appareil de transmission d'un signal de réponse - Google Patents

Procédé et appareil de transmission d'un signal de réponse Download PDF

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Publication number
WO2011155754A2
WO2011155754A2 PCT/KR2011/004152 KR2011004152W WO2011155754A2 WO 2011155754 A2 WO2011155754 A2 WO 2011155754A2 KR 2011004152 W KR2011004152 W KR 2011004152W WO 2011155754 A2 WO2011155754 A2 WO 2011155754A2
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WO
WIPO (PCT)
Prior art keywords
dtx
information
downlink
ack
nack
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Ceased
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PCT/KR2011/004152
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English (en)
Korean (ko)
Other versions
WO2011155754A3 (fr
Inventor
이현우
장지웅
정재훈
한승희
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LG Electronics Inc
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LG Electronics Inc
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Publication of WO2011155754A3 publication Critical patent/WO2011155754A3/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • 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) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or 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 signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Definitions

  • the present invention relates to a wireless communication system. Specifically, the present invention provides a transmission scheme of ACK / NACK and DTX to effectively support a plurality of component carriers in a mobile communication system.
  • a 3GPP LTE (3rd Generation Partnership Project Long Term Evolution (LTE)) communication system will be described.
  • E-UMTS Evolved Universal Mobile Telecommunications System
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • the E-UMTS may be referred to as a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the technical specification of the E-UMTS refer to Release 7 of the “3rd Generation Partnership Project; Technical Specification Group Radio Access Network”.
  • the technical specification of the E-UMTS refer to Release 8 and Release 9 of the "3rd Generation Partnership Project; Technical Specification Group Radio Access Network”.
  • an E-UMTS is located at an end of a user equipment (UE) 120, a base station (eNode B; eNB) 110a and 110b, and a network (E-UTRAN) to be connected to an external network.
  • UE user equipment
  • eNode B base station
  • E-UTRAN network
  • A Access Gateway
  • the base station may transmit multiple data streams simultaneously for broadcast service, multicast service and / or unicast service.
  • the base station controls data transmission and reception for a plurality of terminals.
  • the base station transmits downlink scheduling information for downlink (DL) data and informs the user equipment of time / frequency domain, encoding, data size, and HARQ (Hybrid Automatic Repeat and reQuest) related information.
  • DL downlink
  • HARQ Hybrid Automatic Repeat and reQuest
  • the base station transmits uplink scheduling information to uplink UL data for uplink (UL) data and informs the user equipment of time / frequency domain, encoding, data size, HARQ related information, and the like.
  • the core network may be composed of an AG and a network node for user registration of the terminal.
  • the AG manages the mobility of the UE in units of a tracking area (TA) composed of a plurality of cells.
  • Wireless communication technology has been developed to LTE based on WCDMA, but the demands and expectations of users and operators are continuously increasing.
  • new technological evolution is required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are required.
  • LTE-Advanced LTE-Advanced
  • LTE-A is for defining a technical specification of Release 10 of the "3rd Generation Partnership Project; Technical Specification Group Radio Access Network”.
  • the LTE-A system aims to support broadband up to 100 MHz.
  • LTE-A system is to use a carrier aggregation (carrier aggregation or bandwidth aggregation) technology that achieves a broadband by using a plurality of component carriers.
  • Carrier aggregation allows a plurality of component carriers to be used as one large logical frequency band in order to use a wider frequency band.
  • the bandwidth of each component carrier may be defined based on the bandwidth of the system block used in the LTE system.
  • Each component carrier is transmitted using a component carrier.
  • multiple component carriers for example, carrier aggregation up to 100 MHz, support for up to five downlink component carriers, and up to five
  • the existing LTE Rel-8 system is designed for single layer and single component carriers for downlink or uplink. There is a need for a method for effectively supporting such multiple component carriers and / or transport blocks and / or multiple codewords.
  • the present invention provides a transmission scheme of ACK / NACK (Acknowledgement / Negative Acknowledgement) and DTX (Discontinuous Transmission) for effectively supporting a plurality of component carriers in a wireless communication system to which a carrier aggregation technique is applied.
  • a method for transmitting a response signal by a terminal includes receiving downlink data from a base station through each of the plurality of downlink resources, and the downlink And transmitting response information about data through one uplink resource, wherein the response information includes: a first DTX indicating the number of downlink resources in a DTX (Discontinuous Transmission) state among the plurality of downlink resources; Information, second DTX information for identifying an index of downlink resources in the DTX state, and ACK / NACK indicating any one of ACK or NACK for each of the downlink resources that are not in the DTX state among the plurality of downlink resources. Contains information.
  • the ACK / NACK information and the second DTX information are mapped to be sequentially arranged in the uplink resource.
  • the first DTX information may be mapped to be disposed at any one of the front end or the rear end of the ACK / NACK information and the second DTX information arranged in order in the uplink resource.
  • the at least one piece of ACK / NACK information may be arranged in an index order of downlink resources instead of corresponding DTX states.
  • the first DTX information may be mapped to be fixed to a specific location of the uplink resource.
  • the second DTX information indicates an index for each of the downlink resources in the DTX state when the number of downlink resources in the DTX state is less than or equal to the number of downlink resources other than the DTX state among the plurality of downlink resources.
  • the number of downlink resources in the DTX state of the plurality of downlink resources is not equal to or less than the number of the downlink resources other than the DTX state, it may indicate an index for each downlink resource not in the DTX state.
  • the index of the downlink resource may be a logical cell index.
  • an apparatus for transmitting a response signal in a wireless communication system supporting a plurality of downlink resources includes a receiver for receiving downlink data through each of the plurality of downlink resources from a base station, and the downlink data. And a transmitter for transmitting response information about one uplink resource, wherein the response information includes: first DTX information indicating the number of downlink resources in a DTX (Discontinuous Transmission) state among the plurality of downlink resources; Second DTX information for identifying an index of the downlink resource in the DTX state, and ACK / NACK information indicating any one of ACK or NACK for each of the downlink resources that are not in the DTX state among the plurality of downlink resources; do.
  • first DTX information indicating the number of downlink resources in a DTX (Discontinuous Transmission) state among the plurality of downlink resources
  • Second DTX information for identifying an index of the downlink resource in the DTX state
  • ACK / NACK information indicating any one of
  • FIG. 1 schematically illustrates an E-UMTS network structure as an example of a wireless communication system.
  • FIG. 2 illustrates a block diagram of a transmitter and a receiver for OFDMA and SC-FDMA.
  • 3 is a diagram illustrating the structure of a radio frame used in LTE.
  • FIG. 4 illustrates an example of performing communication in a single component carrier situation.
  • 5 is a diagram illustrating a structure of an uplink subframe used in LTE.
  • FIG. 6 illustrates a PUCCH structure for transmitting ACK / NACK.
  • FIG. 7 illustrates an example of determining a PUCCH resource for ACK / NACK signal transmission.
  • FIG. 8 is a diagram illustrating an example of performing communication under a multi-carrier situation.
  • 10A and 10B illustrate an example of indicating DTX for two component carriers.
  • 11A and 11B illustrate an example of indicating DTX for three component carriers.
  • 12A and 12B show an example of indicating DTX for four component carriers.
  • 13A to 13D show examples of DTX indication for five component carriers.
  • FIG. 14 is a diagram illustrating an example of instructing repetitive transmission for a multi-component carrier
  • 15 is a diagram illustrating a base station and a terminal that can be applied to an embodiment in the present invention.
  • a system in which a system band uses a single component carrier is referred to as a legacy system or a narrowband system.
  • a system in which the system band includes a plurality of component carriers and uses at least one or more component carriers as a system block of the legacy system is referred to as an evolved system or a wideband system.
  • the component carrier used as the legacy system block has the same size as the system block of the legacy system.
  • the size of the remaining component carriers is not particularly limited. However, for system simplification, the size of the remaining component carriers may also be determined based on the system block size of the legacy system.
  • the 3GPP LTE system and the 3GPP LTE-A system are in a relationship between a legacy system and an evolved system.
  • the 3GPP LTE system is referred to herein as an LTE system or a legacy system.
  • the terminal supporting the LTE system is referred to as an LTE terminal or a legacy terminal.
  • the 3GPP LTE-A system is referred to as LTE-A system or evolved system.
  • a terminal supporting the LTE-A system is referred to as an LTE-A terminal or an evolved terminal.
  • the present specification describes an embodiment of the present invention using an LTE system and an LTE-A system, but this is an example and the embodiment of the present invention can be applied to any communication system corresponding to the above definition.
  • transmitters 202 to 214 are terminals and receivers 216 to 230 are part of a base station.
  • a transmitter is part of a base station and a receiver is part of a terminal.
  • an OFDMA transmitter includes a serial to parallel converter 202, a sub-carrier mapping module 206, an M-point inverse discrete fourier transform (IDFT) module, and the like. 208, a cyclic prefix (CP) addition module 210, a parallel to serial converter (212) and a Radio Frequency (RF) / Digital to Analog Converter (DAC) module 214. .
  • CP cyclic prefix
  • RF Radio Frequency
  • DAC Digital to Analog Converter
  • Signal processing in the OFDMA transmitter is as follows. First, a bit stream is modulated into a data symbol sequence.
  • the bit stream may be obtained by performing various signal processing such as channel encoding, interleaving, scrambling, etc. on the data block received from the medium access control (MAC) layer.
  • the bit stream is also called a codeword (codeword) and is equivalent to a block of data received from the MAC layer.
  • the data block received from the MAC layer is also called a transport block.
  • the modulation scheme may include, but is not limited to, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), and M-ary Quadrature Amplitude Modulation (m-QAM).
  • BPSK Binary Phase Shift Keying
  • QPSK Quadrature Phase Shift Keying
  • m-QAM M-ary Quadrature Amplitude Modulation
  • the serial data symbol sequences are converted N by N in parallel (202).
  • the N data symbols are mapped to the allocated N subcarriers among the total M subcarriers, and the remaining M-N carriers are padded with zeros (206).
  • Data symbols mapped to the frequency domain are converted to time domain sequences through M-point IDFT processing (208).
  • an OFDMA symbol is generated by adding a CP to the time-domain sequence.
  • the generated OFDMA symbols are converted 212 in parallel to serial.
  • the OFDMA symbol is transmitted to the receiver through the process of digital-to-analog conversion, frequency upconversion, etc. (214).
  • the other user is allocated an available subcarrier among the remaining M-N subcarriers.
  • the OFDMA receiver includes an RF / ADC (Analog to Digital Converter) module 216, a serial / parallel converter 218, a Remove CP module 220, an M-point Discrete Fourier Transform (DFT) module 222, Subcarrier demapping / equalization module 224, bottle / serial converter 228, and detection module 230.
  • the signal processing of the OFDMA receiver consists of the inverse of the OFDMA transmitter.
  • the SC-FDMA transmitter further includes an N-point DFT module 204 before the subcarrier mapping module 206 as compared to the OFDMA transmitter.
  • SC-FDMA transmitter can significantly reduce the peak-to-average power ratio (PAPR) of the transmission signal compared to the OFDMA scheme by spreading a plurality of data in the frequency domain through the DFT prior to IDFT processing.
  • the SC-FDMA receiver further includes an N-point IDFT module 226 after the subcarrier demapping module 224 as compared to the OFDMA receiver.
  • the signal processing of the SC-FDMA receiver consists of the inverse of the SC-FDMA transmitter.
  • 3 is a diagram illustrating a structure of a radio frame used in LTE.
  • a radio frame has a length of 10 ms (327200 ⁇ T s ) and consists of 10 equally sized subframes.
  • Each subframe has a length of 1 ms and consists of two slots.
  • Each slot has a length of 0.5 ms (15360 ⁇ T s ).
  • the slot includes a plurality of OFDMA (or SC-FDMA) symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain.
  • one resource block includes 7 or 6 OFDMA (or SC-FDMA) symbols over 12 subcarriers.
  • the number of OFDMA (or SC-FDMA) symbols in one resource block depends on the length of a CP used (normal cyclic prefix or extended cyclic prefix).
  • a transmission time interval (TTI) which is a unit time in which data is transmitted, may be determined in units of one or more subframes.
  • TTI transmission time interval
  • the structure of the above-described radio frame is only an example, and the number of subframes in the radio frame, the number of slots in the subframe, and the number of OFDMA (or SC-FDMA) symbols in the slot may be variously changed.
  • 4 is a diagram illustrating an example of performing communication in a single configuration carrier situation. 4 may correspond to a communication example of an LTE system.
  • FDD frequency division duplex
  • data transmission and reception are performed through one downlink band and one uplink band corresponding thereto.
  • the radio frame structure of FIG. 4 is used only for downlink transmission or uplink transmission.
  • TDD time division duplex
  • the same frequency band is divided into a downlink section and a corresponding uplink section in the time domain.
  • the radio frame structure of FIG. 4 is divided for downlink transmission and uplink transmission corresponding thereto.
  • control information for downlink data transmission of a base station is transmitted to a terminal through a downlink control channel configured in a control region of a downlink subframe.
  • the downlink control channel includes a physical downlink control channel (PDCCH).
  • the terminal receives scheduling information (for example, resources to which data is allocated, data size, coding scheme, redundancy version, etc.) through a control channel, and then receives scheduled data through a downlink common channel indicated by the scheduling information. can do.
  • the downlink shared channel includes a PDSCH (Physical Uplink Channel).
  • the terminal may transmit a reception response signal (eg, HARQ ACK / NACK, DTX) for downlink data to the base station through an uplink control channel set in the control region of the uplink subframe.
  • the uplink control channel includes a PUCCH (Physical Uplink Control Channel).
  • PUCCH Physical Uplink Control Channel
  • HARQ ACK / NACK is simply indicated as an ACK / NACK signal.
  • the base station After receiving an ACK / NACK signal from the terminal, the base station retransmits downlink data indicated by NACK or DTX.
  • the HARQ process may be performed for each transport block corresponding to each downlink data.
  • 5 is a diagram illustrating a structure of an uplink subframe used in LTE.
  • an uplink subframe includes a plurality of slots (eg, two).
  • the slot may include different numbers of SC-FDMA symbols according to the CP length. For example, in case of a normal CP, a slot may include 7 SC-FDMA symbols.
  • the uplink subframe is divided into a data region and a control region.
  • the data area includes a PUSCH and is used to transmit a data signal such as voice.
  • the control region includes a PUCCH and is used to transmit control information.
  • the control information includes ACK / NACK, CQI, PMI, RI, and the like.
  • PUSCH and PUCCH are not simultaneously transmitted in one UE in LTE. Table 1 below shows the characteristics of the PUCCH format described in 3GPP TS 36.211 Release-8.
  • Table 1 PUCCH format Modulation scheme Number of bits per subframe, One N / A N / A 1a BPSK One 1b QPSK 2 2 QPSK 20 2a QPSK + BPSK 21 2b QPSK + QPSK 22
  • FIG. 6 is a diagram illustrating a PUCCH structure for transmitting ACK / NACK.
  • ACK / NACK in the case of a normal CP, three consecutive symbols located in the middle of a slot carry a reference signal UL RS, and control information (ie, ACK / NACK) is carried on the remaining four symbols.
  • the slot includes six symbols and reference signals are carried on the third and fourth symbols.
  • ACK / NACK from a plurality of terminals is multiplexed onto one PUCCH resource using a CDM scheme.
  • the CDM scheme is implemented using a cyclic shift (CS) of a sequence for frequency spread and / or an orthogonal cover sequence for time spread.
  • ACK / NACK is a different Cyclic Shift (CS) (frequency spread) and / or a different Walsh / DFT orthogonal cover sequence (CG-CAZAC) sequence of Computer Generated Constant Amplitude Zero Auto Correlation. Time spreading).
  • CS Cyclic Shift
  • CG-CAZAC Walsh / DFT orthogonal cover sequence
  • the w0, w1, w2, w3 multiplied after the IFFT is multiplied before the IFFT.
  • a PUCCH resource for transmitting ACK / NACK is represented by a combination of positions of frequency-time resources (eg, resource blocks), cyclic shift of a sequence for frequency spreading, and an orthogonal cover sequence for time spreading, and each PUCCH. Resources are indicated using PUCCH (Resource) Index.
  • FIG. 7 is a diagram illustrating an example of determining a PUCCH resource for ACK / NACK signal transmission.
  • the PUCCH resources for ACK / NACK are not allocated to each UE in advance, and a plurality of PUCCH resources are divided and used at every time point by a plurality of UEs in a cell.
  • the PUCCH resource used by the UE to transmit ACK / NACK corresponds to a PDCCH carrying scheduling information for the downlink data (PDSCH).
  • the entire region in which the PDCCH is transmitted in each downlink subframe consists of a plurality of control channel elements (CCEs), and the PDCCH transmitted to the UE consists of one or more CCEs.
  • the UE transmits ACK / NACK through a PUCCH resource corresponding to a specific CCE (eg, first or lowest CCE) among CCEs configuring the PDCCH received by the UE.
  • a specific CCE eg, first or lowest CCE
  • each rectangle represents a CCE in a downlink component carrier (downlink component carrier), and each rectangle represents a PUCCH resource in an uplink component carrier (UL CC).
  • Each PUCCH index corresponds to a PUCCH resource for ACK / NACK. If it is assumed that the information on the PDSCH is transmitted through the PDCCH configured to 4 ⁇ 6 CCE as shown in Figure 7, the UE ACK / NACK through the 4 PUCCH corresponding to the 4 CCE, the first CCE constituting the PDCCH Send it.
  • FIG. 6 illustrates a case in which up to M PUCCHs exist in a UL CC when up to N CCEs exist in a downlink component carrier.
  • N may be M, but it is also possible to design M and N values differently and to overlap the mapping of CCE and PUCCH.
  • the PUCCH resource index in the LTE system is determined as follows.
  • n (1) PUCCH represents a PUCCH resource index for transmitting ACK / NACK
  • N (1) PUCCH represents a signaling value received from the upper layer
  • n CCE is the most of the CCE index used for PDCCH transmission Represents a small value.
  • 8 is a diagram illustrating an example of performing communication under a multiple carrier configuration. 8 may correspond to an example of communication of the LTE-A system.
  • the LTE-A system uses a carrier aggregation or bandwidth aggregation technique that collects a plurality of uplink / downlink frequency blocks and uses a larger uplink / downlink bandwidth to use a wider frequency band. Each frequency block is transmitted using a component carrier (CC).
  • CC component carrier
  • five 20 MHz component carriers may be gathered on the uplink and the downlink to support a 100 MHz bandwidth.
  • Component carriers may be contiguous or non-contiguous in the frequency domain.
  • the radio frame structure illustrated in FIG. 3 may be equally applied even when using a multi-component carrier.
  • the base station and the terminal may transmit and receive signals through a plurality of component carriers on one subframe.
  • FIG. 8 illustrates a case where both the bandwidth of an uplink component carrier and the bandwidth of a downlink component carrier are the same and symmetrical. However, the bandwidth of each component carrier can be determined independently.
  • the bandwidth of the uplink component carrier may be configured as 5 MHz (UL CC0) + 20 MHz (UL CC1) + 20 MHz (UL CC2) + 20 MHz (UL CC3) + 5 MHz (UL CC4).
  • asymmetrical carrier aggregation in which the number of UL CCs and the number of downlink component carriers are different may be possible. Asymmetric carrier aggregation may occur due to the limitation of available frequency bands or may be artificially established by network configuration.
  • the uplink signal and the downlink signal are illustrated as being transmitted through one-to-one mapped component carriers, the component carriers through which signals are actually transmitted may vary according to network settings or types of signals.
  • the component carrier on which the scheduling command is transmitted and the component carrier on which data is transmitted according to the scheduling command may be different.
  • uplink / downlink control information may be transmitted through a specific uplink / downlink component carrier regardless of mapping between component carriers.
  • the terminal when the number of uplink component carriers is smaller than the number of downlink component carriers, the terminal should transmit ACK / NACK for a plurality of downlink PDSCH transmissions through fewer uplink PUCCHs.
  • ACK / NACK for a plurality of downlink PDSCH transmissions may be configured to be transmitted only through a specific uplink component carrier.
  • the terminal receives a plurality of transport blocks when using a multiple input multiple output (MIMO) transmission scheme or operating in TDD. In this case, the UE must transmit ACK / NACK signals for a plurality of transport blocks through limited PUCCH resources.
  • MIMO multiple input multiple output
  • the method of transmitting a response signal including an uplink control signal that is, ACK / NACK
  • the method of transmitting a response signal according to the present invention assumes that a plurality of PUCCH resources for transmitting an ACK / NACK signal are located in the same physical resource block, but is not necessarily limited thereto. Even if it is within a certain frequency range, PUCCH resources located in other physical resource blocks are also applicable if similarities in channel conditions exist.
  • the present invention may be applied to a response to download data (eg, PDSCH) or download control channel (eg, PDCCH), and upload data (eg, PUSCH) or upload control channel (eg, PUCCH). ) May be applied to the response.
  • download data eg, PDSCH
  • download control channel eg, PDCCH
  • upload data eg, PUSCH
  • upload control channel eg, PUCCH
  • the channel through which the present invention is transmitted may also be download data (e.g., PDSCH) or download control channel (e.g., PDCCH), and upload data (e.g., PUSCH) or upload control channel (e.g., , PUCCH).
  • download data e.g., PDSCH
  • download control channel e.g., PDCCH
  • upload data e.g., PUSCH
  • upload control channel e.g., PUCCH
  • a DTX state of a terminal may occur. For example, when the base station schedules data only for N 'configuration carriers smaller than N when N configuration carriers are configured, the N-N' configuration carriers may be in a DTX state. As another example, when the terminal has a download assignment on a specific component carrier but fails to detect, the component carrier may be in a DTX state.
  • HARQ performance may be degraded. That is, it is not possible to find exact criteria for the selection of the HARQ method for retransmission (eg, 'chase combining' or 'the best redundancy version (RV)', etc.) and the selection of the MCS. Therefore, it is preferable to also transmit the DTX state in the ACK / NACK transmission.
  • the HARQ method for retransmission eg, 'chase combining' or 'the best redundancy version (RV)', etc.
  • the present invention can be applied not only to the case of transmitting the DTX state together when transmitting ACK / NACK, but also to the case of omitting the DTX state or sharing the DTX state as the NACK state.
  • 1 may indicate an ACK
  • 0 may indicate a NACK or DTX state in the bit level representation.
  • the unit in which ACK / NACK is transmitted may be each codeword, each component carrier file, or each subframe.
  • the unit in which the ACK / NACK is transmitted may be a result after performing various ACK / NACKs (bundling, omission, or the number of ACKs, etc.) on the spatial domain / frequency domain / time domain. .
  • ACK / NACKs for component carriers other than DTX may be sequentially arranged among the configured component carriers.
  • the UE may inform a combination of non-DTX component carriers or a group in which ACK / NACK is transmitted.
  • an indicator of such non-DTX component carriers requires a large number of bits, and an indicator for a group of non-DTX component carriers is defined in the table for the non-DTX component carriers and an indicator thereof. Etc., a complicated process is required. In addition, when the number of configured carriers increases, a new definition of the group of non-DTX carriers and an indicator thereof is necessary. That is, it is not preferable in terms of system expansion.
  • the present invention proposes a method of arranging ACK / NACKs for component carriers other than DTX and informing a component carrier (s) index of DTX among component carriers set using other bits. That is, depending on the number of DTX configuration carriers, some bits of the ACK / NACK codeword are used to transmit ACK / NACK information, and some other bits are used to indicate DTX information. That is, various information about the DTX of the component carrier may be indicated through the DTX information (hereinafter, referred to as DTX information).
  • the DTX information may be an indication of the logical index of the DTX configuration carriers, the number of DTX configuration carriers, and the index of the A / N configuration carrier or a group thereof.
  • the DTX information may be for non-DTX component carriers other than the DTX component carrier, or may be information including DTX component carriers and non-DTX component carriers.
  • the information included as the response signal for the multiple component carriers may include fixed DTX information, variable DTX information, and ACK / NACK information.
  • the DTX information may include fixed DTX information fixedly positioned to indicate the number of component carriers in the DTX state and variable DTX information indicating the state of the component carriers in the DTX state.
  • the information included in the response signal of the multi-component carriers also includes ACK / NACK information indicating the state of the component carrier in the ACK / NACK state.
  • ACK / NACK represented by a specific number of bits
  • an error in a particular bit ends up as an error in the information (s) in the bit or in the component carrier that contains the bit.
  • the DTX information is information indicating which component carrier other codewords are, and an error of a specific bit in the DTX information also affects the interpretation of associated ACK / NACK bits. Therefore, correct detection / demodulation of DTX information is more important than information on ACK / NACK for component carriers.
  • the term 'component carrier' is used for convenience of description, but the component carrier used may be used as a cell.
  • the cell is a combination of downlink resources and optionally uplink resources.
  • the link between the carrier frequency of the downlink resource and the carrier resource of the uplink resource appears in the system information transmitted to the downlink resource.
  • FIG. 9 is a diagram illustrating an example of indicating DTX for multiple component carriers.
  • ACK / NACKs for multiple carriers are continuously arranged earlier, and an example of informing DTX information by using back bits will be described. This example is shown in FIGS. 9 to 14.
  • the specific bit (s) always indicate DTX info.
  • the number of bits (eg, 1 bit or 2 bits) for this fixed DTX information may vary depending on the number of component carriers.
  • the DTX information indicates the DTX state of the component carriers, and it is described that fixed DTX information and variable DTX information exist.
  • the fixed DTX information transmits at least one component carrier having a DTX state or at least one component carrier having a DTX state.
  • variable DTX information indicates that one or more component carriers have a DTX state. It can also be used to
  • a / N information (ACK / NACK information) at a predetermined position is used for the non-DTX configuration carrier. do.
  • the variable DTX information may include different contents according to the number of non-DTX or component carriers of the DTX. For example, when one non-DTX component carrier exists, the variable DTX information may indicate a logical index of the non-DTX component carrier. Meanwhile, when two or more DTX carriers exist, the variable DTX information may indicate a logical index of the DTX carrier. That is, the index of the component carrier corresponding to the number of component carriers of the DTX state or the ACK / NACK state may be indicated.
  • variable DTX information for a specific component carrier having a DTX state may be a logical index for all configured (or activated or scheduled) component carriers. That is, the logical index of the component carrier of the variable DTX information may be an index set regardless of whether or not the DTX.
  • the fluctuation DTX information is the original A / N information in which adjacent (for example, immediately preceding) A / N information of a predetermined position is used. It may be used whether or not used as or as the variable DTX information for a specific component carrier having a DTX state.
  • Reuse and reinterpretation of the A / N information into the DTX information is preferably used hierarchically in accordance with the A / N information unit as in the example of FIG. 9, but is adjacent to (eg, immediately after) a predetermined position.
  • the meaning may be determined in combination with the variable DTX information.
  • CC Component Carrier
  • DTX CCy denote logical indexes of non-DTX CCs (component carriers other than DTX) and logical indexes of DTX CCs (component carriers with DTX), respectively. Or scheduled component carriers) may be different from each other.
  • FIG. 9A when there exists a component carrier in the DTX state, the logical index of the non-DTX component carrier is indicated through the variable DTX information preceding the fixed DTX information.
  • the component carrier in the DTX state exists, the logical index of the DTX component carrier may be indicated through the variable DTX information preceding the fixed DTX information.
  • FIG. 9B shows a case of three component carriers
  • FIG. 9C shows a case of four component carriers
  • FIG. 9D shows a case of five component carriers. Indicates.
  • ACK is 0 and NACK is 1 or A / N without bit representation.
  • this is for convenience and the present invention is not limited to the bit representation of ACK / NACK.
  • 'a' and 'b' represent a relative combination of '0' and '1' or '1' and '0', the order of which is not limited by the present invention, but for convenience '0 and' 1 ' Expressed in the drawings.
  • 'c' and 'd' also represent relative combinations such as 'a' and 'b'.
  • the following description describes two bits of ACK / NACK (for example, first A / N and second A / N) per component carrier, but the number of bits per component carrier is not limited to the present invention.
  • 10a shows a DTX indication scheme for two component carriers.
  • ACK / NACK and DTX for two component carriers may be represented using 5 bits.
  • the fixed DTX information in the two component carriers may be used to indicate the number of component carriers in the DTX state among the configured component carriers.
  • ACK / NACKs for non-DTX component carriers may be filled with logical indexes (eg, 00, 01, 10, 11) of component carriers.
  • the specific bit (the last bit as fixed DTX information) is filled with 'a' as shown in FIG. 10A (a). That is, when a specific bit is filled with 'a' at the receiving end, the terminal that has received the received signal may know that all configured component carriers are not DTX, and have transmitted ACK / NACKs for the configured component carriers.
  • a specific bit (the last bit in the example) is filled with 'b' as in the example of FIG. 10A (b) or (c). That is, when a specific bit is filled with 'b' at the receiving end, the terminal transmitting the received signal may recognize that one or more configured component carriers are DTX.
  • variable DTX information may indicate a logical index of the non-DTX component carrier. That is, 'DTX info. for non-DTX CC1 'represents a logical index of the first non-DTX configuration carrier among the total configuration carriers.
  • the DTX info. for non-DTX CC1 ' can determine which component carrier is non-DTX.
  • ACK / NACK of non-DTX carrier is' A / N info. for non-DTX CC1 '.
  • variable DTX information may indicate a logical component carrier index of a component carrier in a DTX state. That is, 'DTX info. for DTX CC1 'represents the logical index of the first DTX configuration carrier among the total configuration carriers. Therefore, after the receiving end knows that one or more configured component carriers are DTX from the specific bit (the last bit in the example) 'b', the DTX info. For DTX CC1 'to know which component carrier is DTX. ACK / NACK of non-DTX carrier is' A / N info. for non-DTX CC1 '.
  • the terminal when all configured carriers are DTX, the terminal does not need to send a response.
  • the terminal when all of the multi-component waves are DTX, the terminal does not need to send a response, and a description thereof will be omitted.
  • FIG. 10B is a diagram schematically illustrating (a) to (c) of FIG. 10A described above.
  • Each box represents one bit
  • the first four bits represent A / N information by two bits
  • the last one bit represents fixed DTX information.
  • fixed DTX information indicates 0, and when there is one, fixed DTX information indicates 1.
  • the two bits preceding the fixed DTX information are converted from the A / N information to the variable DTX information. Since the fixed DTX information has one DTX configuration carrier, it may indicate an index of the DTX configuration carrier or may indicate an index of a configuration carrier other than the DTX.
  • 11A and 11B are diagrams showing an example of indicating DTX for three component carriers.
  • ACK / NACK and DTX for three configuration carriers may be expressed using 7 bits.
  • the fixed DTX information in the two component carriers may indicate the number of DTX component carriers among the configured component carriers, but the three component carriers lack the representation of the bit (1 bit).
  • the DTX information indicates the number of DTX component carriers among the configured component carriers. Can be used to indicate.
  • a specific bit for example, '1'
  • its contents may be indicated / interpreted with other bit (s).
  • the number of bits of the fixed DTX information may be set to 2 bits, and thus, the number of DTX component carriers may be represented.
  • ACK / NACKs for non-DTX component carriers include a logical index of the component carriers.
  • a specific bit (the last bit in the example) is filled with 'a' as shown in FIG. 11A (a). That is, when a specific bit is filled with 'a' at the receiving end, the terminal that has received the received signal may know that all configured component carriers transmit ACK / NACKs for the configured component carriers instead of DTX.
  • a specific bit (the last bit in the example) is filled with 'b'. That is, when a specific bit is filled with 'b' at the receiving end, the terminal transmitting the received signal may recognize that one or more configured component carriers are DTX.
  • a specific component carrier having adjacent D / N information has a DTX state from the variable DTX information of a predetermined position. It is used for DTX information. That is, 'DTX info. for DTX CC1 'represents the logical index of the first DTX configuration carrier among the total configuration carriers. Therefore, after the receiving end knows that one or more configured component carriers are DTX from the specific bit (the last bit in the example) 'b', the DTX info. For DTX CC1 'to know which component carrier is DTX.
  • the ACK / NACKs of non-DTX carriers include 'A / N info. for non-DTX CC1 'and' A / N info. for non-DTX CC2 '.
  • the information may appear in order according to the logical indexes of the predefined component carriers.
  • variable DTX information is used to inform the logical indexes of the component carriers in the DTX state, that is, '00', '01', and ' Only 10 '. Therefore, when the variable DTX information indicates '11', it can be confirmed that two component carriers are DTX.
  • the predetermined 'DTX info.' As shown in (c) of FIG. 11A. Or 'DTX info. Adjacent A / N information from for non-DTX CC1 'is used as variable DTX information for a specific component carrier having a DTX state. Since the number of non-DTX component carriers is one, as shown in FIG. 11A (c), the variable DTX information may indicate a logical index of the non-DTX component carriers. That is, 'DTX info. for non-DTX CC1 'represents a logical index of the first non-DTX configuration carrier among the total configuration carriers.
  • the receiving end knows that one or more configured component carriers are DTX from the specific bit (the last bit in the example) 'b', the 'DTX info.' And / or 'DTX info. for non-DTX CC1 'can determine which component carrier is non-DTX.
  • the ACK / NACKs of non-DTX carriers are defined as' A / N info. for non-DTX CC1 '.
  • the information may appear in order according to the logical indexes of the predefined component carriers.
  • FIG. 11B is a diagram schematically illustrating (a) to (c) of FIG. 11A described above.
  • Each box represents one bit, the first six bits represent A / N information by two bits, and the last one bit represents fixed DTX information.
  • the fixed DTX information indicates 0, and when there is one or two, the fixed DTX information indicates 1.
  • the two bits preceding the fixed DTX information are converted from the A / N information to the variable DTX information.
  • the fixed DTX information indicates 1, together with one variable DTX information preceding the fixed DTX information indicates 11, it can be expressed as the presence of two DTX carriers. .
  • the other variable DTX information may indicate an index of the non-DTX component carrier.
  • 12A is a diagram illustrating an example of indicating DTX for four component carriers.
  • ACK / NACK and DTX for four component carriers may be represented using 10 bits.
  • description will be made on the assumption that use of basic 2 bits of fixed DTX information is used.
  • the fixed DTX information in four component carriers may be used to indicate the number of DTX component carriers among the configured component carriers.
  • the ACK / NACK information for non-DTX component carriers includes logical indexes of component carriers.
  • the fixed DTX information fills a specific bit with 'ab' (eg, 00) as shown in FIG. 12A (a) when all four component carriers are not DTX. That is, when a specific bit is filled with 'ab' at the receiving end, the UE which has transmitted the received signal may know that all configured configuration carriers are not non-DTX and have transmitted ACK / NACKs for the configured configuration carriers. have.
  • specific bits are filled with the number of DTX configuration carriers as shown in FIG. 12A (b).
  • the fixed DTX information may indicate that '01', '10', and '11' have one, two, or three DTX carriers, respectively, through two bits. That is, when the last specific bit (s) at the receiving end is not 0, the terminal that has transmitted the received signal can recognize that one or more configured configuration carriers are DTX.
  • the number of DTX component carriers can be known through fixed DTX information of two bits.
  • the fixed DTX information indicates '11' which is the number of component carriers in the DTX state in both (d) and (e) of FIG. 12A.
  • the 'DTX info. Adjacent preceding A / N information from for DTX CC2 'is converted into variable DTX information and used for the other component carrier having no DTX state.
  • the variable DTX information may represent a logical index of the non-DTX CC as shown in (d) of FIG. 12A. That is, 'DTX info. for DTX CC1 'denotes the logical index of the first DTX configuration carrier of the total configuration carriers,' DTX info.
  • DTX info. for non-DTX CC1 represents a logical index of a non-DTX component carrier among all configured carriers.
  • 'DTX info. for DTX CC1 and CC2 ' may not have a special meaning, and may be processed as other predetermined meanings / values or dummy data.
  • the receiving end knows that one or more configured configuration carriers are DTX from the specific bit (the last 2 bits in the example), and after knowing the number of DTX configuration carriers, the 'DTX info. for non-DTX CC1 'can determine which component carrier is non-DTX.
  • the ACK / NACKs of non-DTX carriers are defined as' A / N info. for non-DTX CC1 '.
  • the DTX information may indicate a logical index of a DTX component carrier. That is, 'DTX info. for DTX CC1 'denotes the logical index of the first DTX configuration carrier of the total configuration carriers,' DTX info. for DTX CC2 'denotes the logical index of the second DTX configuration carrier of the total configuration carriers,' DTX info. for DTX CC3 'represents the logical index of the third DTX component carrier among the configured carriers.
  • FIG. 12B is a diagram schematically illustrating (a) to (e) of FIG. 12A described above.
  • Each box represents one bit, and the first eight bits represent A / N information or variable DTX information by two bits, and the last two bits represent fixed DTX information.
  • the fixed DTX information indicates '00' and when there is one, the fixed DTX information indicates '01'.
  • the two bits preceding the fixed DTX information are converted from the A / N information to the variable DTX information, and represent the logical index of the corresponding DTX configuration carrier.
  • the fixed DTX information indicates '10'.
  • the four bits before the fixed DTX information indicate variable DTX information by two bits, and may indicate a logical index of a DTX component carrier or a logical index of a non-DTX component carrier. If there are three DTX configuration carriers, as described with reference to (d) and (e) of FIG. 12A, they may be divided into two cases.
  • the fixed DTX information indicates '11', and the variable DTX information may indicate a logical index of component carriers of non-DTX or logical indexes of component carriers of three DTXs, respectively.
  • 13A to 13D are diagrams showing examples of DTX indication for five component carriers.
  • ACK / NACK and DTX for five component carriers may be represented by 12 bits.
  • the fixed DTX information could indicate the number of DTX component carriers among the configured component carriers.
  • the five component carriers cannot be represented by the two bits.
  • the variable DTX information is also composed of 2 bits, the maximum number that can be informed by 2 bits is 4 (00, 01, 10, 11). Therefore, the index of the fifth component carrier cannot be indicated by 2 bits.
  • the present invention can be applied to all cases in combination with 12 bits even in this case.
  • the number of DTX configuration carriers is two or less, and the DTX configuration carriers do not include the fifth configuration carrier.
  • the second case is when the DTX component carriers or non-DTX component carriers include the fifth component carrier.
  • the number of DTX carriers is three or more.
  • the first case corresponds to FIG. 13A
  • the second case corresponds to (a) to (d) of FIG. 13C
  • the third case corresponds to (e) and (f) of FIG. 13C.
  • the number of DTX configuration carriers is 2 or less, and the DTX configuration carriers or non-DTX configuration carriers will be described in the case where the fifth configuration carrier is not included.
  • the fixed DTX information may inform the presence of the component carrier in the DTX state and at the same time the number of component carriers in the DTX state, and the variable DTX information may indicate the index of the component carrier in the DTX state.
  • one component carrier is DTX and four component carriers are non-DTX.
  • the presence of the component carrier in the DTX state can be checked, and it can be confirmed that the number is one.
  • DTX info ie 'DTX info.
  • ACK / NACKs of non-DTX component carriers can be known from 'A / N info.'
  • two component carriers are DTX and three component carriers are non-DTX.
  • the fixed DTX information (indicated by bit string 10) confirms the presence of component carriers in the DTX state and confirms that the number is two.
  • 'DTX info for DTX CC1 "and" DTX info. It is possible to know which component carrier is DTX through for DTX CC2 '.
  • ACK / NACKs of non-DTX component carriers can be known from 'A / N info.'
  • FIG. 13B is a diagram schematically illustrating (a) to (c) of FIG. 13A described above.
  • Each box represents 1 bit, the first 10 bits represent A / N information by 2 bits, and the last 2 bits represent fixed DTX information.
  • fixed DTX information indicates '00' and when there is one, fixed DTX information indicates '01'.
  • the two bits in front of the fixed DTX information are converted from the A / N information to the variable DTX information, and represent a logical index of the corresponding DTX component carrier.
  • the fixed DTX information indicates '10'.
  • the four bits before the fixed DTX information indicate variable DTX information by two bits, and may indicate a logical index of a DTX component carrier.
  • the fixed DTX information is '11', and each case is set not to overlap each other.
  • the transmission method (or codeword generation method) for the case where the indication of the fifth component carrier is required may be indicated using a configuration of bits not used in FIG. 13A.
  • an example of distinguishing the case where such an indication for the fifth component carrier is included by transmitting '11', for example, to the last DTX information will be described.
  • the case where the component carrier of the DTX state is the fifth may be displayed using the above-mentioned variable DTX information.
  • two bits of the preceding variable DTX information of the fixed DTX information may be used as interpretation information about the number of DTX component carriers rather than the index of the component carrier.
  • variable DTX information and fixed DTX information are represented assuming 2 bits. Accordingly, in the case of five component carriers, it is possible to express logical indexes of four component carriers through DTX information. That is, it may have four logical indexes '00', '01', '10', and '11'. Therefore, when the remaining one component carrier, that is, the fifth component carrier is to be represented, the unused bits should be displayed.
  • the number of DTX configuration carriers to be described below is set to be distinguished from three and four cases.
  • the fixed DTX information is '11', and the variable DTX information immediately before is '10'.
  • the fixed DTX information is '11'
  • the number of DTX component carriers is checked by using the aforementioned variable DTX information.
  • one DTX component carrier exists, and the index of the component carrier is 5th. Is set to the case.
  • the fixed DTX information is '11', and the variable DTX information immediately preceding is '01'.
  • This combination has three DTX carriers, one of which is the fifth carrier. This is the case.
  • the number of configuration carriers is three, three variable DTX information exists, and the remaining two variable DTX information (DTX info for non-DTX CC1 and DTX info for non-DTX CC2) is the Indicates an index.
  • the fixed DTX information when the fixed DTX information is '11', the three pieces of the variable DTX information are used to confirm the combination of the DTX component carriers.
  • the fixed DTX information when the fixed DTX information is '11', the three floating DTX informations are '11', '11', and '01'.
  • the number of DTX carriers is 4 and one of them is 5 Combination of the first configuration carrier. Since the number of DTX configuration carriers is 4, the DTX information is 4, and the remaining unused variable DTX information indicates the index of the configuration carrier rather than the DTX.
  • the number of DTX carriers is three or more, and corresponds to (e) and (f) of FIG. 13C.
  • the fixed DTX information when the fixed DTX information indicates '11', it may be regarded as including the fifth component carrier, but may be set to include three or more DTX component carriers. Further, it is set to a combination that does not overlap each other.
  • variable DTX information when the fixed DTX information is '11', the above-mentioned variable DTX information is set to '00', in which case there are three DTX carriers. Since there are three carriers of DTX configuration, three fluctuation DTX information exists.
  • the other two variable DTX information (DTX info for non-DTX CC1 and DTX info for non-DTX CC2) indicate the index of the component carrier, not DTX.
  • the previous variable DTX information is '01', and in this case, the two previous variable DTX information are used. That is, when fixed DTX information is '11' and three variable DTX information is '00', '00', and '01', four DTX configuration carriers are set. Since four DTX configuration carriers exist, four fluctuation DTX information exists, and the other fluctuation DTX information (DTX info for non-DTX CC1) indicates an index of a configuration carrier other than DTX.
  • variable DTX information is used to confirm the number of DTX component carriers.
  • FIG. 13D is a diagram schematically illustrating (a) to (f) of FIG. 13C described above.
  • Each box represents 1 bit, the first 10 bits represent A / N information by 2 bits, and the last 2 bits represent fixed DTX information. If the fixed DTX information is '11', the preceding fluctuation DTX information should be interpreted.
  • FIG. 13D when there are one, two, three, and four DTX carriers, a fifth component carrier in a DTX state and three or more DTX component carriers exist and a fifth component carrier exists. Indicates the setting when no exists.
  • such a setting rule of the DTX information and A / N information is exemplary, there may be various applications. That is, various applications that do not overlap each other in terms of codeword application may be applied to the present invention.
  • the number of information to be transmitted may be smaller than the information that can be represented with a specific number of bits.
  • 'DTX info. for DTX CC1 'and' DTX info. for DTX CC2 ' is called' DTX info.
  • DTX information for example, information on DTX configuration carriers or non-DTX configuration carriers
  • specific information for example, information on DTX configuration carriers or non-DTX configuration carriers
  • An error of specific A / N information is represented as an error of ACK / NACK information on a specific component carrier.
  • an error in information on DTX configuration carriers or non-DTX configuration carriers causes an error of complex ACK / NACK across a plurality of configuration carriers, whereby error prevention of such information is more important.
  • the present invention may have a feature of repeatedly transmitting DTX information (eg, information on DTX configuration carriers or non-DTX configuration carriers), but is not limited to the form / format.
  • FIG. 12A (d) An example of modifying the example of FIG. 12A (d) with the repetition of such DTX information is shown in FIG.
  • 'DTX info. for non-DTX CC1 ' is transmitted three times.
  • the receiving end can confirm whether an error has occurred through the detection of the repeated bits (columns).
  • the DTX information may be arranged in a Most Significant Bit (MSB) prior to the ACK / NACK information.
  • MSB Most Significant Bit
  • FIG. 15 illustrates a base station and a terminal that can be applied to an embodiment in the present invention.
  • a wireless communication system includes a base station (BS) 1510 and a terminal (UE) 1520.
  • BS base station
  • UE terminal
  • the transmitter is part of the base station 1510 and the receiver is part of the terminal 1520.
  • uplink the transmitter is part of the terminal 1520 and the receiver is part of the base station 1510.
  • the base station 1510 and / or the terminal 1520 may have a single antenna or multiple antennas.
  • the terminal 1520 includes a processor 1522, a memory 1524, and an RF unit 1526.
  • the processor 1522 may be configured to implement the procedures and / or methods proposed by the present invention.
  • the memory 1524 is connected to the processor 1522 and stores various information related to the operation of the processor 1522.
  • the RF unit 1526 is connected with the processor 1522 and transmits and / or receives a radio signal. That is, the RF unit 1526 includes a transmitting module and a receiving module.
  • Base station 1510 includes a processor 1512, a memory 1514, and a Radio Frequency (RF) unit 1516.
  • the processor 1512 may be configured to implement the procedures and / or methods proposed by the present invention.
  • the memory 1514 is connected to the processor 1512 and stores various information related to the operation of the processor 1512.
  • the RF unit 1516 is connected to the processor 1512 and transmits and / or receives a radio signal. That is, the RF unit 1516 includes a transmitting module and a receiving module.
  • embodiments of the present invention have been mainly described based on data transmission / reception relations between a terminal and a base station.
  • Certain operations described in this document as being performed by a base station may in some cases be performed by 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 a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • the present invention can be applied to a wireless communication system. Specifically, the present invention can be applied to a method and apparatus for transmitting ACK / NACK information by a terminal to a base station in a wireless communication system to which carrier aggregation is applied.

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Abstract

La présente invention concerne un procédé pour transmettre un signal de réponse dans un système de communication sans fil qui supporte une pluralité de ressources de liaison descendante. Le procédé de transmission d'un signal de réponse selon l'invention comprend : une étape consistant à recevoir, d'une station de base, des données de liaison descendante par le biais de chaque ressource de la pluralité de ressources de liaison descendante ; et une étape consistant à transmettre des informations de réponse sur les données de liaison descendante par le biais d'une ressource de liaison montante, lesdites informations de réponse comportant des premières informations de transmission discontinue (DTX) servant à indiquer le nombre de ressources de liaison descendante qui sont dans un état de transmission discontinue (DTX) parmi la pluralité de ressources de liaison descendante, des secondes informations DTX servant à contrôler l'indice des ressources de liaison descendante qui a l'état DTX, et des informations ACK/NACK servant à indiquer l'accusé-réception (ACK) ou le non-accusé-réception (NACK) sur chacune des ressources de liaison descendante qui ne sont pas dans l'état DTX parmi la pluralité de ressources de liaison descendante.
PCT/KR2011/004152 2010-06-07 2011-06-07 Procédé et appareil de transmission d'un signal de réponse Ceased WO2011155754A2 (fr)

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WO2014116049A1 (fr) * 2013-01-25 2014-07-31 Lg Electronics Inc. Procédé et appareil d'exécution d'une procédure d'accès initial dans un système de communication sans fil

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KR101122079B1 (ko) * 2004-08-11 2012-03-15 엘지전자 주식회사 상향링크 패킷 전송에 있어서 수신성공여부신호 전송 방법및 수신성공여부 판단 방법
US20060133290A1 (en) * 2004-12-21 2006-06-22 Bengt Lindoff ACK/NACK detection in wireless communication
US8559946B2 (en) * 2008-02-08 2013-10-15 Qualcomm Incorporated Discontinuous transmission signaling over an uplink control channel

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WO2014116049A1 (fr) * 2013-01-25 2014-07-31 Lg Electronics Inc. Procédé et appareil d'exécution d'une procédure d'accès initial dans un système de communication sans fil
RU2612658C2 (ru) * 2013-01-25 2017-03-13 ЭлДжи ЭЛЕКТРОНИКС ИНК. Способ и устройство для выполнения процедуры начального доступа в системе беспроводной связи
US10039142B2 (en) 2013-01-25 2018-07-31 Lg Electronics Inc. Method and apparatus for performing initial access procedure in wireless communication system
US10869356B2 (en) 2013-01-25 2020-12-15 Lg Electronics Inc. Method and apparatus for performing initial access procedure in wireless communication system

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