WO2017131374A1 - Procédé de commande d'une harq de liaison descendante dans un système de communication sans fil et dispositif associé - Google Patents

Procédé de commande d'une harq de liaison descendante dans un système de communication sans fil et dispositif associé Download PDF

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Publication number
WO2017131374A1
WO2017131374A1 PCT/KR2017/000508 KR2017000508W WO2017131374A1 WO 2017131374 A1 WO2017131374 A1 WO 2017131374A1 KR 2017000508 W KR2017000508 W KR 2017000508W WO 2017131374 A1 WO2017131374 A1 WO 2017131374A1
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Prior art keywords
harq feedback
subframes
information
harq
downlink data
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PCT/KR2017/000508
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English (en)
Korean (ko)
Inventor
김주희
이기호
김기태
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주식회사 케이티
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Priority claimed from KR1020160087313A external-priority patent/KR102299810B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to US16/073,769 priority Critical patent/US10771195B2/en
Publication of WO2017131374A1 publication Critical patent/WO2017131374A1/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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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

Definitions

  • Embodiments of the present invention relate to a signal processing procedure in a wireless communication system, and more particularly, to a downlink HARQ operation procedure and a control method and apparatus for a HARQ signal.
  • millimeter-wave 10 GHz to 300 GHz
  • the millimeter band has a higher path loss than the existing cellular frequency, and the attenuation caused by the atmosphere, water vapor, terrain, and features is large, and the beamforming technique is essential for coverage in order to use the millimeter band in a cellular system.
  • next-generation cellular system is a TDD scheme that has high frequency efficiency and easy beamforming technology is considered first.
  • the dynamic TDD method of dynamically configuring downlink data transmission and uplink data transmission for each subframe according to traffic conditions can increase the efficiency of radio resources, and many studies have been conducted.
  • beamforming technology is essential in next-generation cellular systems, but in beamforming-based cellular systems, the number of beams that can be transmitted at the same time is limited, and thus scheduling and HARQ operation schemes are required.
  • An object of the present embodiments is to provide a downlink HARQ operation procedure and control method in a cellular system using a millimeter band.
  • An object of the present embodiments is to provide an efficient HARQ operation and HARQ feedback control method using a minimum uplink resource in consideration of the constraints and latency of the number of beams that can be transmitted in a beamforming-based cellular system.
  • the present invention in a method for processing a HARQ in a terminal in a wireless communication system, receiving the number of subframes and the HARQ feedback information size to bundle the HARQ feedback of the terminal through RRC signaling, and Receiving downlink control information including downlink data and position information of a subframe to which the HARQ feedback is to be transmitted and the HARQ feedback bundling sequence in the above-described subframe, and performing HARQ feedback delay offset included in the RRC signaling or the downlink control information It provides a method comprising the step of transmitting HARQ feedback for one or more downlink data in one subframe determined based on.
  • bit positions in the HARQ feedback information may be determined according to the order of the HARQ feedback bundling sequence included in the downlink control information for allocating each data. .
  • HARQ An ACK can be sent as a feedback or a NAK can be sent otherwise.
  • HARQ feedback may be configured according to whether all downlink data transmitted in the subframe corresponding to the number of subframes for bundling HARQ feedback is divided by the number of HARQ feedback information is received. Can be.
  • HARQ feedback is performed according to whether the downlink data is received and the HARQ feedback bundling sequence in a subframe corresponding to the number of subframes to bundle HARQ feedback. It can be configured and sent.
  • the UE may distinguish and transmit HARQ feedback for the downlink data transmitted in the consecutive subframes.
  • embodiments of the present invention provide a method for receiving a HARQ in a base station in a wireless communication system, the method comprising: transmitting a number of subframes and a HARQ feedback information size to bundle HARQ feedback of a terminal through RRC signaling; Transmitting downlink control information including the downlink data and the position information of the subframe to which the HARQ feedback is to be transmitted and the HARQ feedback bundling sequence in the above-described subframe, and the HARQ feedback delay offset included in the RRC signaling or the downlink control information.
  • Receiving a HARQ feedback for one or more downlink data in one subframe determined based on the.
  • a bit position in HARQ feedback information may be determined by assigning a HARQ feedback bundling sequence according to a transmission subframe order.
  • the base station determines whether the terminal has received downlink data transmitted in a subframe corresponding to the number of subframes to bundle HARQ feedback and HARQ feedback.
  • HARQ feedback configured according to a bundling sequence may be received, and based on whether downlink data is transmitted for each subframe, bit masking of the received HARQ feedback may be performed to extract valid HARQ feedback.
  • the embodiments of the present invention in a terminal processing HARQ in a wireless communication system, receives the number of subframes and HARQ feedback information size to bundle HARQ feedback through RRC signaling, and downlink in one or more subframes
  • a terminal including a control unit configured to configure HARQ feedback for one or more downlink data to be transmitted in one subframe determined based on an offset and transmit the same through a communication unit.
  • the present embodiment in the base station receiving HARQ in a wireless communication system, configures the number of subframes and HARQ feedback information size to bundle the HARQ feedback of the terminal to be transmitted through RRC signaling, and transmit the HARQ feedback A downlink control information including position information of the subframe and a HARQ feedback bundling sequence, a control unit configured to configure a HARQ feedback delay offset to be transmitted through RRC signaling or downlink control information, and downlink data in at least one subframe It provides a base station including a communication unit for transmitting and transmitting the RRC signaling and downlink control information, and receives HARQ feedback for one or more downlink data in one subframe determined based on the HARQ feedback delay offset.
  • the present embodiments by bundling the reception result of the UE for downlink data transmitted in one or more subframes and transmitting them as one HARQ feedback, it is possible to efficiently support HARQ operation while minimizing uplink resource overhead in a dynamic TDD system. To help.
  • the terminal can efficiently recognize the HARQ feedback bundling, and the base station is a valid HARQ feedback information Make it easy to extract.
  • FIG. 1 illustrates a downlink HARQ operation in a cellular system.
  • 2A and 2B illustrate an uplink resource allocation scheme for HARQ feedback in a dynamic TDD based system.
  • 3 is a view for explaining an overview of downlink HARQ operation and HARQ feedback bundling according to the embodiments.
  • FIG. 4 is a diagram for explaining a main parameter definition for downlink HARQ operation according to the present embodiment.
  • 5 is a view for explaining the HARQ feedback operation.
  • 6A to 6D are diagrams for explaining an example of HARQ operation in the dynamic HARQ feedback delay method according to the present embodiments.
  • FIG. 7 is a diagram illustrating a configuration of a terminal according to the present embodiments.
  • FIG. 8 is a diagram illustrating a configuration of a base station according to the present embodiments.
  • FIG 9 illustrates a HARQ feedback bundling process of a terminal according to the present embodiments.
  • FIG. 10 is a diagram illustrating a downlink HARQ operation of a base station according to the present embodiments.
  • first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the terms are not limited in nature, order, order or number of the components.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the base station may indicate the radio area itself to receive or transmit a signal from the viewpoint of the user terminal or the position of a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmission / reception points, transmission points, and reception points are collectively referred to as base stations. do.
  • LPNs low power nodes
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH extended PDCCH
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a high transmission power or a low transmission power in a macro cell region, which is connected to an eNB or a macro cell (hereinafter referred to as an 'eNB') and wired controlled by an optical cable or an optical fiber to an eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the PDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • millimeter wave 10GHz to 300GHz
  • the millimeter band has a higher path loss than the existing cellular frequency band, and has attenuated by the atmosphere, water vapor, terrain, and features. Therefore, the use of the beamforming technique is essential to secure coverage in order to use the millimeter band in cellular systems.
  • next-generation cellular system is a TDD scheme that is easy to apply the beamforming technology and high frequency efficiency is considered first.
  • the dynamic TDD scheme dynamically configured for downlink data transmission and uplink data transmission for each subframe according to traffic conditions can increase the efficiency of radio resources.
  • the number of beams that can be transmitted at the same time is limited, and thus scheduling and HARQ operation methods are required.
  • the present embodiments provide an efficient downlink HARQ operation procedure and control method in a next generation cellular system having the aforementioned attributes.
  • FIG. 1 illustrates downlink HARQ operation in a cellular system.
  • the base station determines whether to retransmit according to the received HARQ feedback information, and transmits the retransmission data burst after a predetermined time ( g in Figure 1, g is set by the base station scheduler in the case of LTE FDD) when retransmission is necessary.
  • 2A and 2B illustrate an uplink resource allocation scheme for HARQ feedback in a dynamic TDD based system.
  • an uplink resource (xPUCCH) for HARQ feedback is periodically allocated without a separate indication (FIG. 2A) or an uplink resource is allocated on-demand through a control message. This can be done (FIG. 2B).
  • FIG. 2A illustrates a scheme in which uplink resources for HARQ feedback are periodically allocated, and uplink resources for HARQ feedback are allocated according to the allocation period N without additional indication.
  • the periodic HARQ feedback resource allocation scheme does not require an additional DL control message, but is inefficient in terms of resource overhead since a fixed radio resource is always reserved.
  • the allocation period ( N in FIG. 2) can be increased, but in this case, the wireless interval transmission latency is increased (in the next generation 5G system having the requirement of ultra-low latency of 1 msec, the allocation period is less than 3). Small values are appropriate).
  • the dynamic HARQ feedback resource allocation scheme can reduce the resource overhead by dynamically allocating UL resources as needed.
  • the base station should transmit downlink control information (DCI) through a downlink control channel (xPDCCH) or user-specific allocation information through RRC signaling.
  • DCI downlink control information
  • xPDCCH downlink control channel
  • RRC signaling For uplink resource allocation for HARQ feedback, the base station should transmit downlink control information (DCI) through a downlink control channel (xPDCCH) or user-specific allocation information through RRC signaling.
  • DCI downlink control information
  • xPDCCH downlink control channel
  • RRC signaling user-specific allocation information
  • Embodiments of the present invention have been made in view of the characteristics of the HARQ operation procedure in the cellular system, and provide an HARQ method and an efficient control message configuration method using a minimum of HARQ feedback resources in a dynamic TDD-based mobile communication system. .
  • the embodiments of the present invention bundle a reception result of a UE for downlink data transmitted in one or more subframes in a mobile communication system and transmit a downlink HARQ process on one HARQ feedback transmission channel and a HARQ feedback bundling method of the UE (FIG. 3), a method of extracting valid HARQ feedback information from a HARQ feedback channel received by the base station, and a method of configuring a downlink control message of the base station and an associated message structure so that the UE can efficiently recognize HARQ feedback bundling.
  • Figure 3 is for explaining an overview of downlink HARQ operation and HARQ feedback bundling according to the present embodiments
  • Figure 4 is to explain the definition of the main parameters for the downlink HARQ operation according to the embodiments.
  • the main parameters for downlink HARQ operation according to the embodiments in the dynamic TDD structure are as follows.
  • HARQ feedback delay k is 1) determined by the base station scheduler for every data transmission and its value is transmitted to the terminal through DCI including DL scheduling information (Dynamic HARQ feedback delay method), or 2) fixed criteria through RRC signaling.
  • the value may be determined and implicitly determined according to HARQ feedback bundling information included in every downlink control information (DCI) (Semi-static HARQ feedback delay method).
  • the base station informs the user equipment of the selected HARQ feedback delay indication method and the maximum number of subframes ( M_1 ) for bundling HARQ feedback through RRC signaling.
  • the RRC message includes the following information for the HARQ operation.
  • -Maximum number of subframes for bundling HARQ feedback ( M_1 ): can be set to one of ⁇ 1,2,4,8,16 ⁇
  • the HARQ feedback information size ( M ) transmitted by the UE in the HARQ feedback channel (xPUCCH) may be set to one of ⁇ 1, 2, 4, 8 ⁇ bits smaller than M_1 bits through RRC signaling. .
  • the base station determines M according to resource and channel conditions in a semi-static manner and delivers M to the terminal through RRC signaling.
  • FIG. 5 illustrates HARQ feedback operation, and illustrates HARQ feedback on data transmitted in subframe M_1 in M bit (s) using an uplink resource of one subframe.
  • the UE transmits an ACK only when all data bursts transmitted in the subframe M_1 are successfully received, and transmits an NAK even when only one of the M_1 subframe data fails to receive.
  • the UE transmits an ACK, and if no one of the data bursts transmitted in three subframes is received, the NAK is received. send.
  • the data bursts transmitted in subframes n-3 , n-2 are 2 bits of HARQ feedback can be transmitted by setting 1 if all reception is successful, 0 if any reception fails, and 1 if all data bursts transmitted in subframe n-1 , n are successful. have.
  • k is a value determined by the base station scheduler for every data transmission and can be confirmed through downlink control information (DCI).
  • DCI downlink control information
  • Each terminal procedure (higher layer signaling, Radio Resource Control (RRC) message) supportable 1) the minimum of the value of k (k_dl_min) and 2) to support the maximum HARQ process (Max_No_ HARQ _processes) while sending their capability to a base station Provide the number to the base station.
  • RRC Radio Resource Control
  • the base station determines k at each data transmission in consideration of k_dl_min and the scheduling situation.
  • the downlink control information (DCI) includes the following information.
  • HARQ feedback delay offset ( HARQfd_delay_offset )
  • HARQfd_sq HARQ feedback bundling sequence
  • M_1 4, 2bit sequence (values are set in the order of 11, 10, 01, 00 and transmit HARQ feedback after k subframe from subframe with 00)
  • the UE calculates k using equation (1) below, and the information received via the downlink control information (DCI).
  • DCI downlink control information
  • HARQ feedback delay (k) k_dl_min + HARQfd_delay_offset + HARQfd_sq
  • the LSB (least significant bit) to l bit represent a decoding result of the DL data burst of the (current subframe number- k_dl_min - HARQfd_delay_offset - l ) subframe.
  • the base station scheduler as set by reducing the HARQfd _ sq transmission subframe interval as illustrated in Figure 6b. At this time, the terminal feeds back to the NAK when there is no DL transmission in the corresponding subframe.
  • the base station bit-masks M bits with actual transmission subframe information to process only HARQ feedback valid bits.
  • the terminal If the base station transmits data in the subframe ( n -1) as shown in the example of FIG. 6c but the terminal does not successfully receive the xPDCCH, the terminal feedbacks to the corresponding bit as NAK as in the example of FIG. 6b. will be.
  • the bit As a result of bit-masking the DL transmission subframe information by the base station, the bit is recognized as a valid bit and thus determines HARQ data retransmission by recognizing it as a data decoding failure (NAK).
  • NAK data decoding failure
  • the UE transmits HARQ feedback by binding only the data of the previous subframe.
  • Second Embodiment Semi-static HARQ Feedback Delay Method
  • the base station determines the HARQfd _delay_offset value in consideration of k_dl_min and the scheduling situation.
  • the HARQfd _delay_offset value is transmitted to the terminal through an RRC signaling message. Terminal by using the HARQfd_sq received via HARQfd _delay_offset and the downlink control information (DCI) contained in the RRC message, and calculates the k according to equation (1).
  • DCI downlink control information
  • the downlink control information includes the same information as the information element described in the dynamic HARQ feedback delay method, but does not include HARQfd_delay_offset .
  • the detailed HARQ operation procedure is the same as the HARQ operation in the dynamic HARQ feedback delay method.
  • the terminal 700 according to the present embodiments may include a receiver 710, a controller 720, and a transmitter 730.
  • the receiver 710 receives the number of subframes and the size of the HARQ feedback information to bundle the HARQ feedback of the terminal through the RRC signaling from the base station. Further, downlink data is received in at least one subframe, and downlink control information (DCI) including position information of a subframe to transmit HARQ feedback and a HARQ feedback bundling sequence is received.
  • DCI downlink control information
  • the HARQ feedback delay offset included in the RRC signaling or the downlink control information (DCI) is received, and the received information is transmitted to the controller 720.
  • the controller 720 generates HARQ feedback information about a result of receiving one or more downlink data according to HARQ feedback bundling information received through RRC signaling or downlink control information (DCI).
  • DCI downlink control information
  • positions of bits in HARQ feedback information according to the order of HARQ feedback bundling sequence included in downlink control information (DCI) for allocating each data are determined.
  • the transmitter 730 transmits HARQ feedback information generated by the controller 720 in a subframe after the HARQ feedback delay offset from the subframe having the smallest HARQ feedback bundling sequence.
  • the base station 800 may include a controller 810, a transmitter 820, and a receiver 830.
  • the controller 810 configures RRC signaling including a HARQ feedback indication type, a HARQ feedback delay offset, a maximum number of subframes for bundling HARQ feedback, and a size of HARQ feedback information.
  • DCI downlink control information
  • the HARQ feedback delay offset may be included in the downlink control information (DCI).
  • the HARQ feedback delay offset of the RRC signaling may not be valid by setting the HARQ feedback indication type to 0 in the RRC signaling.
  • the transmitter 820 transmits downlink data to the terminal in one or more subframes, and transmits RRC signaling and downlink control information (DCI) configured by the controller 810 to the terminal to provide HARQ feedback bundling control information to the terminal. do.
  • DCI downlink control information
  • the receiver 830 receives HARQ feedback information bundling a reception result of one or more downlink data from the terminal.
  • the controller 810 bit-masks the received HARQ feedback information based on the information of the transmission subframe of the downlink data and extracts valid HARQ feedback information. And, according to the HARQ feedback information, the UE retransmits the downlink data in the subframe failed to receive in the subframe after the specified interval.
  • FIG 9 illustrates a process of a method for transmitting HARQ feedback of a terminal according to the present embodiments.
  • the terminal receives from the base station the number of subframes for bundling HARQ feedback and the size of HARQ feedback information through RRC signaling (S900).
  • the terminal receives downlink data in one or more subframes, and receives downlink control information (DCI) including position information and HARQ feedback bundling sequence of a subframe to transmit HARQ feedback (S920).
  • DCI downlink control information
  • S920 HARQ feedback bundling sequence of a subframe to transmit HARQ feedback
  • HARQ feedback delay offset is received through RRC signaling or downlink control information (DCI).
  • DCI downlink control information
  • the terminal configures HARQ feedback information for the reception result of the one or more downlink data according to the HARQ feedback bundling control information received from the base station (S940).
  • the HARQ feedback bundling sequence is transmitted from the subframe having the smallest HARQ feedback bundling sequence to the base station in the HARQ feedback information bundled in the subframe after the HARQ feedback delay offset (S960).
  • FIG. 10 illustrates a process of a method for receiving HARQ feedback of a base station according to the present embodiments.
  • the base station transmits the number of subframes for bundling HARQ feedback and the size of HARQ feedback information to the terminal through RRC signaling (S1000).
  • the base station transmits downlink data in one or more subframes, and transmits downlink control information (DCI) including position information and HARQ feedback bundling sequence of subframes to which HARQ feedback is transmitted (S1020).
  • DCI downlink control information
  • the HARQ feedback delay offset may be transmitted through RRC signaling or downlink control information (DCI).
  • DCI downlink control information
  • the base station receives HARQ feedback information bundling the reception result for one or more downlink data from the terminal (S1040).
  • the base station bit-masks the HARQ feedback information based on the information of the transmission subframe of the downlink data and extracts valid information from the HARQ feedback information (S1060).
  • the base station checks the reception result of the downlink data transmitted in one or more subframes through the HARQ feedback information received in one subframe, and checks the downlink data of the subframe in which the terminal fails to receive the subframe after a predetermined interval. Resend at.
  • the HARQ feedback bundling control information is provided to the terminal through RRC signaling and downlink control information (DCI), and the bundled HARQ feedback information is received for the reception result of one or more downlink data from the terminal.
  • DCI downlink control information

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  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent une procédure d'opération HARQ et un procédé de commande entre un terminal et une station de base. Selon l'invention, le terminal reçoit des informations de commande de groupage de rétroactions HARQ en provenance de la station de base par une signalisation RRC et des informations de commande de liaison descendante (DCI), regroupe des rétroactions HARQ en réponse aux résultats de réception d'un ou de plusieurs éléments de données de liaison descendante selon les informations de commande de groupage de rétroactions HARQ, et transmet les rétroactions HARQ groupées, et la station de base extrait des informations efficaces des informations de rétroaction HARQ sur la base d'informations de sous-trames de transmission et vérifie si les données de liaison descendante ont été reçues avec succès par le terminal, ce qui permet au terminal de transmettre les rétroactions HARQ tout en réduisant au minimum les ressources de liaison montante, et à la station de base d'effectuer une opération HARQ en vérifiant si des données de liaison descendante dans chaque sous-trame ont été transmises avec succès.
PCT/KR2017/000508 2016-01-29 2017-01-16 Procédé de commande d'une harq de liaison descendante dans un système de communication sans fil et dispositif associé WO2017131374A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/073,769 US10771195B2 (en) 2016-01-29 2017-01-16 Method for controlling downlink HARQ in wireless communication system and device therefor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0011308 2016-01-29
KR20160011308 2016-01-29
KR1020160087313A KR102299810B1 (ko) 2016-01-29 2016-07-11 무선 통신 시스템에서 하향링크 harq를 제어하는 방법 및 그 장치
KR10-2016-0087313 2016-07-11

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US11115171B2 (en) 2017-08-09 2021-09-07 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for determining length of feedback response information and related product
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US11855926B2 (en) 2017-08-09 2023-12-26 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for determining total number of bits of feedback response information and related product

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