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WO2016070790A1 - Procédé et dispositif de renvoi d'informations d'accusé de réception harq - Google Patents

Procédé et dispositif de renvoi d'informations d'accusé de réception harq Download PDF

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Publication number
WO2016070790A1
WO2016070790A1 PCT/CN2015/093689 CN2015093689W WO2016070790A1 WO 2016070790 A1 WO2016070790 A1 WO 2016070790A1 CN 2015093689 W CN2015093689 W CN 2015093689W WO 2016070790 A1 WO2016070790 A1 WO 2016070790A1
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Prior art keywords
terminal
harq
acknowledgment information
dci
bits
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English (en)
Chinese (zh)
Inventor
邢艳萍
沈祖康
潘学明
徐伟杰
高雪娟
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and apparatus for feeding back Hybrid Automatic Repeat Request (HARQ) acknowledgement information.
  • HARQ Hybrid Automatic Repeat Request
  • Downlink Control Information is used to transmit scheduling information and uplink power control information of downlink and uplink data transmissions.
  • DCI is divided into different formats (DCI Format) depending on the purpose and content of the information.
  • a DCI can be carried by a Physical Downlink Control Channel (PDCCH) or an Enhanced Physical Downlink Control Channel (EPDCCH).
  • PDCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • the Long Term Evolution (LTE) system adopts the HARQ mechanism such as synchronous multi-process stop, and the retransmission must occur at a predefined time.
  • the LTE system supports synchronous non-adaptive HARQ retransmission and synchronous adaptive HARQ retransmission.
  • a Physical Hybrid ARQ Indicator Channel PHICH is used to carry HARQ response (ACK/NACK) information for an uplink shared channel (UL-SCH) data packet.
  • the ACK/NACK information is represented by 1-bit signaling, the information length is very short, and the transmission performance of the ACK/NACK is ensured by means of repetition coding, low-order modulation (such as BPSK), orthogonal extension, scrambling, and time-frequency diversity mapping.
  • MTC Machine Type Communication
  • the present application provides a feedback method and apparatus for hybrid automatic repeat request HARQ confirmation information, which is used to implement feedback of HARQ confirmation information.
  • the embodiment of the present application provides a feedback method for hybrid automatic repeat request HARQ confirmation information, including:
  • the network device determines HARQ acknowledgement information of the uplink data channel that needs to be fed back to the terminal;
  • the network device sends downlink control information DCI to the terminal, where the DCI carries HARQ acknowledgement information of the uplink data channel.
  • the DCI carries one or more HARQ confirmation information.
  • the DCI carrying the HARQ acknowledgment information is scrambled using a radio network temporary identifier RNTI dedicated to the HARQ acknowledgment information feedback.
  • the network device further includes a process of encoding the HARQ confirmation information carried in the DCI before the DCI is sent to the terminal, where the coding process includes:
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence The bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system a set of physical resource blocks PRB within the bandwidth
  • the network device sends the DCI, determining, according to the correspondence, a location of a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits, one bit corresponds to HARQ acknowledgment information of one PRB, and N is PRB in one sub-band Quantity
  • i represents the location index of the HARQ acknowledgment information of the terminal in the N bits.
  • the number of the PRB assigned to the terminal in the range of 0, 1, ..., N-1.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band, and the HARQ acknowledgment information carried is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is DMRS cyclic shift possible The total number of values;
  • n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ M bits, where N is the number of PRBs in one subband;
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1, The number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of DMRS cyclic shift;
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ D ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1
  • the number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1, n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • the terminal acquires HARQ confirmation information of an uplink data channel carried in the DCI.
  • the DCI carries one or more HARQ confirmation information.
  • the terminal uses the RNTI dedicated to the HARQ acknowledgment information feedback to descramble the HARQ acknowledgment information carried in the DCI.
  • the terminal acquires HARQ confirmation information of the uplink data channel carried in the DCI, including:
  • the terminal descrambles the decoded HARQ acknowledgement information using an RNTI dedicated to the HARQ acknowledgment information feedback.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence The bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system a set of physical resource blocks PRB within the bandwidth
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits, one bit corresponds to HARQ acknowledgment information of one PRB, and N is PRB in one sub-band Quantity
  • i represents the location index of the HARQ acknowledgment information of the terminal in the N bits.
  • the number of the PRB assigned to the terminal in the range of 0, 1, ..., N-1.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band, and the HARQ acknowledgment information carried is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is DMRS cyclic shift possible The total number of values;
  • n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ M bits, where N is the number of PRBs in one subband;
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1, The number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of DMRS cyclic shift;
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ D ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1
  • the number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1, n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • a processing module configured to determine HARQ confirmation information of an uplink data channel that needs to be fed back to the terminal
  • a sending module configured to send downlink control information DCI to the terminal, where the DCI carries HARQ acknowledgement information of the uplink data channel.
  • the DCI carries one or more HARQ confirmation information.
  • the DCI carrying the HARQ acknowledgment information uses an RNTI dedicated to the HARQ acknowledgment information feedback. Perform scrambling.
  • the processing module is further configured to: add a cyclic redundancy check CRC code to the HARQ acknowledgement information, and use an RNTI dedicated to the HARQ acknowledgement information feedback before transmitting the DCI to the terminal.
  • the CRC code is scrambled to obtain the scrambled HARQ acknowledgment information; the scrambled HARQ acknowledgment information is convolutionally encoded; and the convolutionally encoded HARQ acknowledgment information is rate matched.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system a physical resource block PRB set in the bandwidth
  • the processing module is specifically configured to: determine, according to the correspondence, a location of a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ confirmation information that needs to be fed back to the terminal in the N bits:
  • i represents the location index of the HARQ acknowledgment information of the terminal in the N bits.
  • the number of the PRB assigned to the terminal in the range of 0, 1, ..., N-1.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N ⁇ D bits
  • N is the number of PRBs in one sub-band
  • D is the demodulation reference symbol.
  • the total number of possible values of the cyclic shift DMRS cyclic shift; the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal in the N ⁇ D bits:
  • n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • one of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processing module Specifically, the location of the bit corresponding to the HARQ confirmation information that needs to be fed back to the terminal in the N ⁇ M bits is determined according to the following formula:
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1, The number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal in the N ⁇ D ⁇ M bits:
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ D ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1
  • the number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1, n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • a receiving module configured to receive downlink control information DCI sent by the network device
  • the processing module is configured to obtain HARQ confirmation information of an uplink data channel carried in the DCI.
  • the DCI carries one or more HARQ confirmation information.
  • the processing module uses the RNTI dedicated to the HARQ acknowledgment information feedback to descramble the HARQ acknowledgment information carried in the DCI. .
  • the processing module is further configured to: perform de-rate matching on the received data to obtain a de-rate-matched HARQ acknowledgment information; decode the de-rate matched HARQ acknowledgment information; and use the HARQ-specific acknowledgment information;
  • the RNTI confirming the information feedback descrambles the decoded HARQ acknowledgement information.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system Within bandwidth a physical resource block PRB set
  • the processing module is specifically configured to: determine, according to the correspondence, a position of a bit corresponding to the HARQ confirmation information of the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ confirmation information of the terminal in the N bits:
  • i represents the location index of the HARQ acknowledgment information of the terminal in the N bits.
  • the number of the PRB assigned to the terminal in the range of 0, 1, ..., N-1.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band, and the HARQ acknowledgment information carried is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is DMRS cyclic shift possible
  • the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ D bits:
  • n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • one of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processing module Specifically, the location of the bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ M bits is determined according to the following formula:
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1, The number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processing module is specifically configured to: determine, according to the following formula, a position of a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ D ⁇ M bits:
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ D ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1
  • the number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1, n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • the network device determines the HARQ acknowledgment information of the uplink data channel that needs to be fed back to the terminal; the network device sends the DCI to the terminal, where the DCI carries the HARQ acknowledgment information of the uplink data channel.
  • a new DCI format is defined, and the HARQ confirmation information is carried in the DCI, thereby implementing feedback of the HARQ confirmation information.
  • FIG. 1 is a schematic flowchart of a method for feeding back HARQ confirmation information according to Embodiment 1 of the present application;
  • FIG. 2 is a schematic diagram of a coding process of HARQ confirmation information in an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a method for feeding back HARQ confirmation information according to Embodiment 2 of the present application;
  • FIG. 4 is a schematic diagram of resource allocation according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a base station according to Embodiment 3 of the present application.
  • FIG. 6 is a schematic diagram of a terminal according to Embodiment 4 of the present application.
  • FIG. 7 is a schematic diagram of a base station according to Embodiment 5 of the present application.
  • FIG. 8 is a schematic diagram of a terminal according to Embodiment 6 of the present application.
  • FIG. 1 is a schematic flowchart of a method for feeding back HARQ confirmation information according to Embodiment 1 of the present application, which includes the following steps 101 to 102:
  • Step 101 The network device determines HARQ confirmation information of an uplink data channel that needs to be fed back to the terminal.
  • Step 102 The network device sends a DCI to the terminal, where the DCI carries the uplink data channel. HARQ confirmation information.
  • the DCI described in the foregoing process is the DCI newly defined in the embodiment of the present application, and the DCI is used to carry the feedback HARQ acknowledgement information (including HARQ ACK and/or HARQ NACK).
  • one or more HARQ confirmation information may be carried in the DCI. If the DCI carries multiple HARQ acknowledgment information, the multiple HARQ acknowledgment information may belong to one terminal or multiple terminals.
  • one of the DCIs may carry HARQ acknowledgment information of an uplink data channel in one or more subbands, where the subband refers to a physical resource block (PRB) set within a system bandwidth.
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bits in the bit sequence have a correspondence relationship with the PRB allocated to the terminal, or the bits in the bit sequence are allocated to the terminal There is a correspondence between the PRB and the Demodulation Reference Signal (DMRS) cyclic shift.
  • DMRS Demodulation Reference Signal
  • the following takes the three scenarios as an example to describe the location of the bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the HARQ acknowledgment information bit sequence.
  • a HARI acknowledgment information carrying an uplink data channel in a sub-band the HARQ acknowledgment information carried is N bits, one bit corresponds to HARQ acknowledgment information of one PRB, and N is the number of PRBs in one sub-band.
  • i represents the location index of the HARQ acknowledgment information of the terminal in the N bits.
  • the number of the PRB assigned to the terminal in the range of 0, 1, ..., N-1.
  • a HARI acknowledgment information carrying an uplink data channel in a sub-band is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is the total number of possible DMRS cyclic shift values. .
  • n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • One of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands carries the HARQ acknowledgment information as N ⁇ M bits, where N is the number of PRBs in one subband.
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1, The number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1.
  • One of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, N is the number of PRBs in one subband, and D is DMRS cyclic shift possible The total number of values;
  • i is the position index of the HARQ acknowledgment information of the terminal in the N ⁇ D ⁇ M bits
  • m is a subband number, and the value ranges from 0, 1, ..., M-1
  • the number of the PRB assigned to the terminal, in the range of 0, 1, ..., N-1, n DMRS is the number of the DMRS cyclic shift, which ranges from 0, 1, ..., D-1.
  • the HARQ acknowledgment information carried in the DCI can use feedback specific to the HARQ acknowledgment information.
  • the Radio Network Temporary Identifier (RNTI) is scrambled.
  • the RNTI may be pre-configured by the network side or pre-agreed so that the multiple terminals can use the RNTI to descramble the received DCI or HARQ acknowledgement information.
  • the method further includes the process of encoding the HARQ confirmation information carried in the DCI.
  • the process of encoding may include:
  • the HARQ acknowledgment information feedback is scrambled with the CRC code to obtain the scrambled HARQ acknowledgment information; then, the scrambled HARQ acknowledgment information is convolutionally encoded; after convolutional coding
  • CRC Cyclical Redundancy Check
  • FIG. 2 shows an encoding process for HARQ acknowledgment information carried in the DCI.
  • a DCI carries multiple HARQ acknowledgment information, and each HARQ acknowledgment information is represented by 1 bit, and can be expressed, for example, as a bit sequence a 0 , a 1 , . . . , a A-1 , where A is the number of HARQ acknowledgment information.
  • the RNTI dedicated to the terminal and the CRC may be used for scrambling.
  • the DCI is transmitted in a common search space.
  • the DCI may be transmitted through a physical downlink control channel, and the physical downlink control channel may be transmitted in a data area, and the physical downlink control channel may support a common search space.
  • the DCI in the embodiment of the present application can be transmitted through a physical downlink channel.
  • the uplink and downlink of the low-cost MTC UE in the LTE system only support the 1.4 MHz radio frequency bandwidth
  • the original PDCCH and PHICH channels continue to The control region sends
  • the MTC UE cannot receive the PDCCH and the PHICH, where the PHICH is used to carry the HARQ acknowledgement information, and the PDCCH is used to carry the DCI. Therefore, the physical downlink control channel needs to be sent in the data area to carry information carried by the PDCCH and the PHICH of the control region, and the physical downlink control channel may be referred to as an M-PDCCH.
  • the M-PDCCH and the EPDCCH and the Physical Downlink Shared Channel (PDSCH) multiplex the data region by frequency division.
  • the DCI for carrying the HARQ acknowledgment information in the embodiment of the present application may be sent by using the M-PDCCH.
  • the network device determines the HARQ acknowledgment information of the uplink data channel that needs to be fed back to the terminal; the network device sends the DCI to the terminal, where the DCI carries the HARQ acknowledgment information of the uplink data channel.
  • a new DCI format is defined, and the HARQ confirmation information is carried in the DCI, thereby implementing feedback of the HARQ confirmation information.
  • FIG. 3 is a schematic flowchart of a method for feeding back HARQ confirmation information according to Embodiment 2 of the present application, including:
  • Step 301 The terminal receives downlink control information DCI sent by the network device.
  • Step 302 The terminal acquires HARQ confirmation information of an uplink data channel carried in the DCI.
  • the DCI carries one or more HARQ confirmation information.
  • the terminal performs de-rate matching on the received data to obtain a HARQ confirmation after de-rate matching.
  • Information decoding the rate-matched HARQ acknowledgment information; descrambling the decoded HARQ acknowledgment information.
  • one of the DCIs may carry HARQ acknowledgment information of an uplink data channel within one or more subbands, where the subband refers to a set of physical resource blocks PRB within a system bandwidth.
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bits in the bit sequence have a correspondence relationship with the PRB allocated to the terminal, or the bits in the bit sequence are allocated to the terminal.
  • the PRB and the demodulation reference symbol cyclic shift DMRS cyclic shift have a corresponding relationship;
  • the terminal may determine a position of the bit corresponding to the HARQ confirmation information of the terminal in the bit sequence according to the correspondence.
  • the following describes the location of the bit corresponding to the HARQ acknowledgment information of the terminal in the HARQ acknowledgment information bit sequence.
  • a DCI acknowledgment information carrying an uplink data channel in a sub-band the HARQ acknowledgment information carried is N bits, one bit corresponds to HARQ acknowledgment information of one PRB, and N is the number of PRBs in one sub-band.
  • the terminal determines the position of the bit corresponding to the HARQ acknowledgement information of the terminal in the N bits according to the above formula (1).
  • N 6, that is, one MTC subband contains 6 PRBs, and 6 PRBs in one MTC subband are numbered 0, 1, ..., 5 in the frequency domain from low to high;
  • DCC0 carries MTC
  • the HARQ acknowledgment information of the uplink data channel in the subband 0, and the HARQ acknowledgment information of the uplink data channel in the MTC subband 1 is carried in the DCI1; as shown in FIG. 4, the terminal UE1 is assigned the PRB#1 in the MTC subband 0.
  • UE2 is assigned PRB#4 in MTC subband 1, and UE2 hops within the subframe.
  • UE1 when UE1 receives the DCI0, it determines that the bit corresponding to the HARQ acknowledgment information is a1 of DCI0 according to the assigned PRB# 1 ; when UE2 receives the DCI1, it determines according to the assigned PRB#4.
  • the bit corresponding to the HARQ acknowledgment information is a 4 of DCI1.
  • a HARI acknowledgment information carrying an uplink data channel in a sub-band is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is the total number of possible DMRS cyclic shift values. ;
  • N 6, that is, one PRB contains 6 PRBs, and 6 PRBs in one subband are numbered 0, 1, ..., 5 in the frequency domain from low to high;
  • DCI0 carries subband 0.
  • HARQ acknowledgment information of the uplink data channel in the DCI1 the HARQ acknowledgment information of the uplink data channel in the subband 1 is carried in the DCI1;
  • the UE1 is assigned the PRB#1 in the subband 0, and the UE2 is assigned the PRB# in the subband 1. 4; and the possible values of DMRS cyclic shift are 0, 1, 2, 3.
  • One of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband;
  • N 6, that is, one PRB contains 6 PRBs, and 6 PRBs in one subband are numbered 0, 1, ..., 5 in the frequency domain from low to high;
  • a sub-band carries a sub-band 0 and HARQ acknowledgment information of the uplink data channel in subband 1;
  • UE1 is assigned PRB#1 in subband 0, and UE2 is assigned PRB#4 in subband 1
  • the DCI UE1,. 1 when receiving the DCI UE1,. 1 determines HARQ acknowledgment information bits corresponding to a 1 in the DCI according to their assigned subbands 0 PRB #; upon receiving the DCI UE2, according to The PRB #4 in the subband 1 to which it is allocated determines that the bit corresponding to the HARQ acknowledgment information is a 10 in the DCI.
  • the DCI UE1,. 1 when receiving the DCI UE1,. 1 determines HARQ acknowledgment information corresponding to the bits in the DCI according to a 2 assigned to subbands 0 PRB #; upon receiving the DCI UE2, according to The PRB #4 in the subband 1 to which it is assigned determines that the bit corresponding to the HARQ acknowledgment information is a 9 in the DCI.
  • One of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, N is the number of PRBs in one subband, and D is DMRS cyclic shift possible The total number of values;
  • N 6, that is, one PRB contains 6 PRBs, and 6 PRBs in one subband are numbered 0, 1, ..., 5 in the frequency domain from low to high; a sub-band carries a sub-band 0 and HARQ acknowledgment information of the uplink data channel in subband 1; UE1 is assigned PRB#1 in subband 0, and UE2 is assigned PRB#4 in subband 1.
  • the possible values of DMRS cyclic shift are 0, 1, 2, 3.
  • the bit corresponding to the HARQ acknowledgment information is determined to be a 40 in the DCI according to the PRB #4 in the subband 1 to which it is allocated.
  • the decoding process of the terminal corresponds to the coding process on the network side, and details are not described herein again.
  • the DCI is transmitted in a common search space.
  • the DCI may be transmitted through a physical downlink control channel, and the physical downlink control channel may be transmitted in a data area, and the physical downlink control channel may support a common search space.
  • the embodiment of the present application receives the downlink control information DCI sent by the network device by using the terminal, and acquires the HARQ acknowledgement information of the uplink data channel carried in the DCI.
  • a new DCI format is defined, and the HARQ confirmation information is carried in the DCI, thereby implementing feedback of the HARQ confirmation information.
  • the embodiment of the present application further provides a base station and a terminal.
  • the specific content of the base station and the terminal may be implemented by referring to the foregoing method, and details are not described herein again.
  • FIG. 5 is a schematic diagram of a base station according to Embodiment 3 of the present application, where the base station includes:
  • the processing module 501 is configured to determine HARQ confirmation information of an uplink data channel that needs to be fed back to the terminal;
  • the sending module 502 is configured to send downlink control information DCI to the terminal, where the DCI carries HARQ acknowledgement information of the uplink data channel.
  • the DCI carries one or more HARQ confirmation information.
  • the DCI carrying the HARQ acknowledgment information is scrambled using an RNTI dedicated to the HARQ acknowledgment information feedback.
  • the processing module 501 is further configured to: add a cyclic redundancy check CRC code to the HARQ acknowledgement information, and use an RNTI dedicated to the HARQ acknowledgement information feedback before transmitting the DCI to the terminal.
  • the CRC code is scrambled to obtain the scrambled HARQ acknowledgment information; the scrambled HARQ acknowledgment information is convolutionally encoded; and the convolutionally encoded HARQ acknowledgment information is rate matched.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system a physical resource block PRB set in the bandwidth
  • the processing module 501 is specifically configured to: determine, according to the correspondence, a position of a bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processing module 501 is specifically configured to: determine, according to formula (1) above, HARQ that needs to be fed back to the terminal. The position of the bit corresponding to the information is confirmed in the N bits.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N ⁇ D bits
  • N is the number of PRBs in one sub-band
  • D is the demodulation reference symbol.
  • the total number of possible values of the cyclic shift DMRS cyclic shift; the processing module 501 is specifically configured to: determine, according to the above formula (2-1) or formula (2-2), a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal. The position in the N x D bits.
  • one of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processing module The 501 is specifically configured to: determine, according to the foregoing formula (3-1) or the formula (3-2), a position of a bit corresponding to the HARQ confirmation information that needs to be fed back to the terminal in the N ⁇ M bits.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processing module 501 is specifically configured to: according to the above formula (4-1) or formula (4-2) or formula (4-3) or formula (4-4) or formula ( 4-5) or Equation (4-6) determines the position of the bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the N x D x M bits.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • FIG. 6 is a schematic diagram of a terminal according to Embodiment 4 of the present application, where the terminal includes:
  • the receiving module 601 is configured to receive downlink control information DCI sent by the network device;
  • the processing module 602 is configured to obtain HARQ acknowledgement information of the uplink data channel carried in the DCI.
  • the DCI carries one or more HARQ confirmation information.
  • the processing module 602 in the process of acquiring the HARQ acknowledgment information of the uplink data channel carried in the DCI, uses the RNTI dedicated to the HARQ acknowledgment information feedback to perform the HARQ acknowledgment information carried in the DCI. De-scrambling.
  • the processing module 602 is further configured to perform de-rate matching on the received data to obtain the de-rate matched HARQ acknowledgment information, and decode the de-rate matched HARQ acknowledgment information;
  • the RNTI of the HARQ acknowledgment information feedback descrambles the decoded HARQ acknowledgment information.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the bit has a corresponding relationship with the PRB allocated to the terminal, or the bit in the bit sequence has a corresponding relationship with the PRB allocated to the terminal and the cyclically shifted DMRS cyclic shift of the demodulation reference symbol
  • the subband refers to the system a physical resource block PRB set in the bandwidth
  • the processing module 602 is specifically configured to: determine the terminal according to the correspondence
  • the HARQ acknowledgment information corresponds to the position of the bit in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processing module 602 is specifically configured to: determine, according to the foregoing formula (1), a position of a bit corresponding to the HARQ confirmation information of the terminal in the N bits.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band, and the HARQ acknowledgment information carried is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is DMRS cyclic shift possible
  • the processing module 602 is specifically configured to: determine, according to the foregoing formula (2-1) or formula (2-2), a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ D bits. position.
  • one of the DCIs carrying the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processing module The 602 is specifically configured to: determine, according to the foregoing formula (3-1) or the formula (3-2), a position of a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ M bits.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processing module 602 is specifically configured to: according to the above formula (4-1) or formula (4-2) or formula (4-3) or formula (4-4) or formula ( 4-5) or Equation (4-6) determines the position of the bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the N x D x M bits.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • FIG. 7 is a schematic diagram of a base station according to Embodiment 5 of the present application, where the base station includes:
  • the processor 701 is configured to read a program in the memory 703, and perform the following process: determining HARQ confirmation information of an uplink data channel that needs to be fed back to the terminal; and transmitting, by the transceiver 702, downlink control information DCI to the terminal, where the DCI is Carrying HARQ confirmation information of the uplink data channel;
  • the transceiver 702 is configured to receive and transmit data under the control of the processor 701.
  • the DCI carries one or more HARQ confirmation information.
  • the DCI carrying the HARQ acknowledgment information is scrambled using an RNTI dedicated to the HARQ acknowledgment information feedback.
  • the processor 701 is further configured to: add a cyclic redundancy check CRC code to the HARQ acknowledgement information, and use an RNTI dedicated to the HARQ acknowledgement information feedback before transmitting the DCI to the terminal.
  • the CRC code is scrambled to obtain the scrambled HARQ acknowledgment information; the scrambled HARQ acknowledgment information is convolutionally encoded; and the convolutionally encoded HARQ acknowledgment information is rate matched.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the network has a corresponding relationship with the PRB allocated to the terminal; the sub-band refers to a continuous physical resource block PRB subset within the system bandwidth; the processor 701 is specifically configured to: according to the terminal allocated The PRB determines the location of the bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processor 701 is specifically configured to: determine, according to the above formula (1), a position of a bit corresponding to the HARQ confirmation information that needs to be fed back to the terminal in the N bits.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N ⁇ D bits
  • N is the number of PRBs in one sub-band
  • D is the demodulation reference symbol.
  • the total number of possible values of the cyclic shift DMRS cyclic shift; the processor 701 is specifically configured to: determine, according to the above formula (2-1) or formula (2-2), a bit corresponding to the HARQ acknowledgement information that needs to be fed back to the terminal. The position in the N x D bits.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processor The 701 is specifically configured to: determine, according to the foregoing formula (3-1) or the formula (3-2), a position of a bit corresponding to the HARQ confirmation information that needs to be fed back to the terminal in the N bits.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processor 701 is specifically configured to: according to the above formula (4-1) or formula (4-2) or formula (4-3) or formula (4-4) or formula ( 4-5) or Equation (4-6) determines the position of the bit corresponding to the HARQ acknowledgment information that needs to be fed back to the terminal in the N x D x M bits.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 701 and various circuits of memory represented by memory 703.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 702 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 701 is responsible for managing the bus architecture and the usual processing, and the memory 703 can store the processor 701 for execution. The data used during the operation.
  • FIG. 8 is a schematic diagram of a terminal according to Embodiment 6 of the present application, where the terminal includes:
  • the processor 801 is configured to read the program in the memory 803, and execute the following process: receiving the downlink control information DCI sent by the network device by using the transceiver 802, and acquiring the HARQ acknowledgement information of the uplink data channel carried in the DCI;
  • the transceiver 802 is configured to receive and transmit data under the control of the processor 801.
  • the DCI carries one or more HARQ confirmation information.
  • the processor 801 in the process of acquiring the HARQ acknowledgment information of the uplink data channel carried in the DCI, uses the RNTI dedicated to the HARQ acknowledgment information feedback to perform the HARQ acknowledgment information carried in the DCI. De-scrambling.
  • the processor 801 is further configured to perform de-rate matching on the received data to obtain a de-rate matched HARQ acknowledgment information, and decode the de-rate matched HARQ acknowledgment information;
  • the RNTI of the HARQ acknowledgment information feedback descrambles the decoded HARQ acknowledgment information.
  • one of the DCIs carries HARQ acknowledgment information of an uplink data channel in one or more subbands
  • the HARQ acknowledgment information of the uplink data channel in the one or more subbands is a bit sequence, the bit sequence
  • the bit in the network has a corresponding relationship with the PRB allocated to the terminal; the sub-band refers to a continuous physical resource block PRB subset within the system bandwidth; the processor 801 is specifically configured to: according to the terminal allocated The PRB determines the location of the bit corresponding to the HARQ acknowledgment information of the terminal in the bit sequence.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band
  • the HARQ acknowledgment information carried is N bits
  • one bit corresponds to HARQ acknowledgment information of one PRB
  • N is PRB in one sub-band
  • the processor 801 is specifically configured to: determine, according to the above formula (1), a position of a bit corresponding to the HARQ confirmation information of the terminal in the N bits.
  • one DCI carries the HARQ acknowledgment information of the uplink data channel in one sub-band, and the HARQ acknowledgment information carried is N ⁇ D bits, N is the number of PRBs in one sub-band, and D is DMRS cyclic shift possible
  • the processor 801 is specifically configured to: determine, according to the above formula (2-1) or formula (2-2), a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ D bits. position.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, the HARQ acknowledgment information carried is N ⁇ M bits, and N is the number of PRBs in one subband; the processor The 801 is specifically configured to: determine, according to the foregoing formula (3-1) or the formula (3-2), a position of a bit corresponding to the HARQ confirmation information of the terminal in the N ⁇ M bits.
  • one of the DCIs carries the HARQ acknowledgment information of the uplink data channel in the M subbands, and the HARQ acknowledgment information carried is N ⁇ D ⁇ M bits, where N is the number of PRBs in one subband, and D is The total number of possible values of the DMRS cyclic shift; the processor 801 is specifically configured to: according to the above formula (4-1) or formula (4-2) or formula (4-3) or formula (4-4) or formula ( 4-5) or formula (4-6) determines the HARQ that needs to be fed back to the terminal The position of the bit corresponding to the acknowledgment information in the N ⁇ D ⁇ M bits.
  • the DCI is transmitted in a common search space.
  • the DCI is transmitted through a physical downlink control channel, and the physical downlink control channel is transmitted in a data region.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 801 and various circuits of memory represented by memory 803.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 802 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 804 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 in performing operations.
  • the embodiment of the present application determines the HARQ acknowledgment information of the uplink data channel that needs to be fed back to the terminal by using the network device; the network device sends the DCI to the terminal, where the DCI carries the HARQ acknowledgement of the uplink data channel. information.
  • a new DCI format is defined, and the HARQ confirmation information is carried in the DCI, thereby implementing feedback of the HARQ confirmation information.
  • embodiments of the present application can be provided as a method, or a computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un procédé et un dispositif de renvoi d'informations d'accusé de réception de demande de répétition automatique hybride (HARQ). Selon les modes de réalisation de la présente invention, un dispositif de réseau détermine des informations d'accusé de réception HARQ d'un canal de données de liaison montante qui ont besoin d'être renvoyées à un terminal ; et le dispositif de réseau envoie des informations de commande de liaison descendante (DCI) au terminal, les DCI transportant les informations d'accusé de réception HARQ du canal de données de liaison montante. Dans les modes de réalisation de la présente invention, un nouveau format de DCI est défini, de telle sorte que les DCI sont aptes à transporter les informations d'accusé de réception HARQ, de façon à renvoyer les informations d'accusé de réception HARQ.
PCT/CN2015/093689 2014-11-06 2015-11-03 Procédé et dispositif de renvoi d'informations d'accusé de réception harq Ceased WO2016070790A1 (fr)

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WO2019127183A1 (fr) * 2017-12-28 2019-07-04 北京小米移动软件有限公司 Procédé et dispositif de transmission d'informations de demande automatique de répétition hybride
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