WO2018028413A1 - 混合自动重传请求确认harq-ack反馈方法和装置 - Google Patents

混合自动重传请求确认harq-ack反馈方法和装置 Download PDF

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Publication number
WO2018028413A1
WO2018028413A1 PCT/CN2017/093789 CN2017093789W WO2018028413A1 WO 2018028413 A1 WO2018028413 A1 WO 2018028413A1 CN 2017093789 W CN2017093789 W CN 2017093789W WO 2018028413 A1 WO2018028413 A1 WO 2018028413A1
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WIPO (PCT)
Prior art keywords
downlink data
harq
terminal device
indication information
ack feedback
Prior art date
Application number
PCT/CN2017/093789
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English (en)
French (fr)
Inventor
孙伟
吕永霞
郭志恒
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020197005652A priority Critical patent/KR102241575B1/ko
Priority to AU2017308598A priority patent/AU2017308598B2/en
Priority to JP2019507284A priority patent/JP6857713B2/ja
Priority to BR112019002304A priority patent/BR112019002304A2/pt
Priority to EP17838543.1A priority patent/EP3493437B1/en
Publication of WO2018028413A1 publication Critical patent/WO2018028413A1/zh
Priority to US16/272,140 priority patent/US10917199B2/en

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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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • H04L1/1806—Go-back-N protocols
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a hybrid automatic repeat request acknowledgement HARQ-ACK feedback method and apparatus.
  • LTE Long Term Evolution
  • HARQ-ACK Hybrid Automatic Repeat Request Acknowledgement
  • FDD Frequency Division Duplex
  • TDD Time Duplexing Division
  • the terminal device after receiving the downlink data in the nth subframe, the terminal device feeds back HARQ-ACK feedback information in the n+4th subframe, where n is an integer.
  • n is an integer.
  • the subframe number of the downlink subframe that needs to be fed back in each uplink subframe is pre-agreed, and when the downlink data sent in the downlink subframe is received, the HARQ is fed back through the corresponding uplink subframe.
  • ACK feedback information is provided.
  • the nth uplink subframe is pre-agreed for feeding back HARQ-ACK feedback corresponding to the downlink data in the two downlink subframes n-4 and n-5. information.
  • the base station can flexibly perform resource scheduling, that is, the base station can schedule the HARQ-ACK feedback information corresponding to the multiple downlink subframes to perform uplink feedback on one uplink subframe; however, for flexible scheduling,
  • the terminal device can only feed back the HARQ-ACK feedback information according to the received downlink data, and the number of downlink data received by the terminal device may be smaller than the number of actual data sent by the base station. Therefore, the terminal device will not be able to correctly feed back the HARQ-ACK feedback information.
  • the embodiment of the present application provides a HARQ-ACK feedback method and device, where the technical solution is as follows:
  • a HARQ-ACK feedback method comprising:
  • the network device sends at least one downlink data and downlink control information (Downlink Control Information, DCI) corresponding to the at least one downlink data to the terminal device.
  • DCI Downlink Control Information
  • the terminal device receives at least one downlink data and at least one downlink data corresponding to the terminal device.
  • DCI Downlink Control Information
  • the DCI carries the first indication information, and the first finger
  • the indication information is used to indicate a target transmission time interval (Transmission Time Interval, TTI for short) of the HARQ-ACK feedback information corresponding to the at least one downlink data.
  • each downlink data may correspond to one DCI.
  • the at least one downlink data may correspond to the same DCI, which is not limited herein.
  • the first indication information may be a feedback delay of at least one downlink data, where the feedback delay is a time difference between the target TTI and the TTI of the downlink data.
  • the first indication information may also be a number of a target TTI of the HARQ-ACK feedback information corresponding to the feedback downlink data.
  • the target TTI is a TTI for feeding back HARQ-ACK feedback information corresponding to the downlink data.
  • the HARQ-ACK feedback information is used to indicate a reception status of at least one downlink data.
  • the receiving status may be successful reception or reception failure.
  • the terminal device may determine, according to the first indication information in the DCI, the target TTI of the HARQ-ACK feedback information corresponding to the feedback downlink data, and generate the target TTI in the target TTI.
  • the second indication information is used to indicate the number of bits of the HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the generated HARQ-ACK feedback information is fed back to the network device in the target TTI.
  • the network device may receive the HARQ-ACK feedback information that the terminal device feeds back in the target TTI, and after receiving, decode the HARQ-ACK feedback information according to the second indication information.
  • the determined HARQ-ACK feedback information may be code modulated, mapped to an uplink channel, and then sent to the network device by using the uplink channel to send the HARQ-ACK feedback information.
  • the network device After receiving the DCI corresponding to the at least one downlink data and the at least one downlink data sent by the network device, determining the target TTI according to the first indication information in the DCI, and then generating the HARQ-ACK feedback information that needs to be fed back in the target TTI. And transmitting the generated HARQ-ACK feedback information to the network device in the target TTI; solving the problem that the terminal device cannot correctly feed back the HARQ-ACK feedback information in the prior art, and achieving the last downlink data even before receiving the target TTI. If there is packet loss, the terminal device can correctly feed back the effect of its corresponding HARQ-ACK feedback information.
  • the second indication information is information pre-agreed by the network device and the terminal device.
  • the second indication information may be pre-set information in the network device and the terminal device, or information sent by the network device to the terminal device through the DCI, or the network device is controlled by a system message or a radio resource.
  • Radio Resource Control abbreviation: RRC
  • the second indication information includes a preset feedback delay, where the second indication information indicates the number of bits of the HARQ-ACK feedback information by using a preset feedback delay.
  • the network device may further specify, in the target TTI of the HARQ-ACK feedback information corresponding to the downlink data, the number of bits of the HARQ-ACK feedback information that needs to be fed back, that is, the second indication information.
  • the number of bits of the HARQ-ACK feedback information that needs to be fed back in the target TTI of the HARQ-ACK feedback information corresponding to the feedback downlink data may also be used.
  • the terminal device generates HARQ-ACK feedback that needs feedback in the target TTI.
  • the steps of the information may include:
  • the terminal device Determining, by the terminal device, the first HARQ-ACK feedback information that needs to be fed back in the target TTI according to the respective downlink data received before the target TTI and the first indication information corresponding to each downlink data;
  • the terminal device detects, according to the first indication information corresponding to the last downlink data received before the target TTI and the preset feedback delay, whether there is unreceived downlink data before the target TTI after receiving the last downlink data;
  • the terminal device determines, according to the detected number of unreceived downlink data, the second HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the DCI may further include a number of the downlink data.
  • the step of determining, by the terminal device, the first HARQ-ACK feedback information may include:
  • the terminal device determines the HARQ-ACK feedback information corresponding to the downlink data according to the demodulation result of each downlink data;
  • the terminal device detects, according to the received number of each downlink data, whether there is a packet loss
  • the terminal device determines that the HARQ-ACK feedback information corresponding to the lost downlink data is a NACK.
  • the step of determining, by the terminal device, the first HARQ-ACK feedback information may further include:
  • the terminal device determines HARQ-ACK feedback information corresponding to the downlink data according to the demodulation result of the downlink data;
  • the terminal device After receiving the DCI, the terminal device detects whether there is a packet loss at every predetermined time interval before the target TTI;
  • the terminal device determines that the HARQ-ACK feedback information corresponding to the lost downlink data is a NACK.
  • the number of the HARQ-ACK feedback information determined by the terminal device may be at least two, and the step of the terminal device feeding back the determined HARQ-ACK feedback information to the network device may include:
  • the HARQ-ACK feedback information sorted in a preset order is fed back to the network device in the target TTI, and the preset order is an order agreed in advance with the network device.
  • Each of the HARQ-ACK feedback information is sorted in a preset order, and the preset sequence is a predetermined order with the network device, so that the network device can correctly learn which data is successfully sent according to the received HARQ-ACK feedback information. And which data failed to be sent.
  • step about the network device side may be separately implemented as a HARQ-ACK feedback method on the network device side
  • step on the terminal device side may be separately implemented as a HARQ-ACK feedback method on the terminal device side.
  • a HARQ-ACK feedback device in a second aspect, includes at least one unit, and the at least one unit is configured to implement the HARQ-ACK feedback method on the network device side in the foregoing first aspect.
  • a HARQ-ACK feedback device in a third aspect, includes at least one unit, and the at least one unit is configured to implement the HARQ-ACK feedback method on the terminal device side in the foregoing first aspect.
  • the present application provides a HARQ-ACK feedback device, where the device includes a processor and a memory, where the memory stores at least one instruction, at least one program, a code set, or a command set, the at least one instruction, the A lesser program, the set of codes, or the set of instructions is loaded and executed by the processor to implement the HARQ-ACK feedback method on the network device side in the first aspect.
  • the application provides a computer readable storage medium, where the storage medium stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one program, the code set, or the The instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the network device side in the first aspect.
  • the application provides a HARQ-ACK feedback device, where the device includes a processor and a memory, where the memory stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one segment
  • the program, the code set, or the set of instructions is loaded and executed by the processor to implement the HARQ-ACK feedback method on the terminal device side in the first aspect.
  • the application provides a computer readable storage medium, where the storage medium stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one program, the code set, or the The instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the terminal device side in the first aspect.
  • FIG. 1 is a schematic diagram of an implementation environment involved in various embodiments of the present application.
  • FIG. 2 is a flowchart of a method for a HARQ-ACK feedback method provided by an embodiment of the present application.
  • FIG. 3A is a schematic diagram of HARQ-ACK feedback information determined by a terminal device according to an embodiment of the present application.
  • FIG. 3B is another schematic diagram of HARQ-ACK feedback information determined by a terminal device according to an embodiment of the present application.
  • FIG. 3C is still another schematic diagram of HARQ-ACK feedback information determined by a terminal device according to an embodiment of the present application.
  • FIG. 3D is still another schematic diagram of HARQ-ACK feedback information determined by a terminal device according to an embodiment of the present application.
  • FIG. 3E is a flowchart of another method of the HARQ-ACK feedback method provided by an embodiment of the present application.
  • FIG. 3F is a flowchart of still another method of the HARQ-ACK feedback method provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a HARQ-ACK feedback apparatus according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a HARQ-ACK feedback apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an implementation environment involved in a HARQ-ACK feedback method provided by various embodiments of the present application.
  • the implementation environment may include: a network device 110 and a terminal device 120 .
  • the network device 110 may be a base station, a server, or a terminal device.
  • the following embodiments exemplify the network device as a base station.
  • the network device can be connected to the terminal device 120 through a wired or wireless network.
  • the terminal device 120 can be a device such as a cell phone, tablet, or e-reader.
  • FIG. 2 is a flowchart of a method for the HARQ-ACK feedback method provided by an embodiment of the present application. This embodiment is illustrated by using the HARQ-ACK feedback method in the implementation environment shown in FIG. As shown in FIG. 2, the HARQ-ACK feedback method may include the following steps:
  • Step 201 The base station sends at least one downlink data and downlink control information corresponding to at least one downlink data (Downlink Control Information, DCI for short) to the terminal device, where the DCI includes first indication information.
  • DCI Downlink Control Information
  • the first indication information is used to indicate a target transmission time interval (Transmission Time Interval, TTI for short) of the HARQ-ACK feedback information corresponding to the at least one downlink data.
  • TTI Transmission Time Interval
  • the first indication information may include the following two types:
  • the first type is a feedback delay of at least one downlink data, where the feedback delay is a time difference between a TTI for transmitting at least one downlink data and a target TTI for feeding back HARQ-ACK feedback information corresponding to the downlink data.
  • the time difference can be expressed by the number of TTIs.
  • the first indication information may be K, and the K*TTI length is the time difference, and K is an integer greater than or equal to 0.
  • the length of the TTI may be the length of the downlink TTI or the length of the uplink TTI. It can also be the length of other types of TTIs, and the base station side and the terminal device side can be pre-arranged, which is not limited in this application.
  • the time difference can also be represented by the number of subframes.
  • the first indication information may be J, then J*t is the time difference, J is an integer greater than or equal to 0, and t is the subframe length of one subframe.
  • the subframe length may be The length of the downlink subframe may be the length of the uplink subframe or the length of the other types of subframes.
  • the base station side and the terminal device side may be pre-arranged, which is not limited in this application.
  • the time difference can be expressed in absolute time.
  • the first indication information may be M, then M*Ts is the time difference, M is an integer greater than or equal to 0, and Ts is a time unit pre-agreed by the base station and the terminal device, and the unit of Ts may be milliseconds, or may be Microseconds, or other values, are not limited in this application.
  • the number of the target TTI of the HARQ-ACK feedback information corresponding to each downlink data is fed back.
  • the first indication information may be 20, and the first indication information indicates that the HARQ-ACK feedback information corresponding to the downlink data is fed back in the target TTI with the number 20.
  • the number of the TTI may be a relative number in a radio frame.
  • Step 202 The terminal device receives at least one downlink data sent by the base station and a DCI corresponding to the at least one downlink data.
  • Step 203 The terminal device determines, according to the first indication information, a target TTI that feeds back HARQ-ACK feedback information corresponding to the at least one downlink data.
  • the terminal device determines, from the TTI that receives the downlink data, the TTI delayed by the feedback delay to be the target TTI.
  • the terminal device determines, from the TTI that receives the downlink data, that the TTI after delaying the K TTIs is the target TTI. For another example, if the first indication information is J and J*t is the feedback delay, the terminal device determines the TTI after delaying J subframes as the target TTI from the subframe in which the downlink data is received. For example, if the first indication information is M, and M*Ts is the feedback delay, the terminal device determines the TTI of the delay M*Ts time as the target TTI from the subframe in which the downlink data is received.
  • the terminal device directly determines the TTI corresponding to the number as the target TTI.
  • Step 204 The terminal device generates, according to the second indication information, HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the terminal device may determine, according to the first indication information corresponding to each received downlink data, the target TTI.
  • the downlink data is then generated according to the determined each downlink data, the first indication information corresponding to each downlink data, and the second indication information, to generate HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the first indication information corresponding to each downlink data is directed to the target TTI.
  • the second indication information is information for indicating the number of bits of the HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the second indication information may be indication information indicating a total number of bits of HARQ-ACK feedback information in the target TTI, or a preset feedback delay.
  • the preset feedback delay is the minimum difference between the TTI of the downlink data and the target TTI of the HARQ-ACK feedback information corresponding to the feedback downlink data, and the preset feedback delay is a predetermined delay between the base station and the terminal device.
  • the preset feedback delay indication manner may include:
  • the preset feedback delay can be expressed in absolute time.
  • the second indication information may be m, then m*ts is the preset feedback delay, m is an integer greater than or equal to 0, and ts is a unit of time pre-agreed by the network device and the terminal device, and the unit of ts It can be milliseconds, microseconds, or other values, and is not limited in this application.
  • the preset feedback delay may be represented by the number of TTIs.
  • the second indication information may be k, and the length of the k*TTI is the preset feedback delay, and k is an integer greater than or equal to 0.
  • the length of the TTI may be the length of the downlink TTI.
  • the length of the uplink TTI may also be the length of the other types of TTIs.
  • the base station side and the terminal device side pre-arrange, which is not limited in this application.
  • the preset feedback delay may also be represented by the number of subframes.
  • the second indication information may be j, then j*t is the preset feedback delay, j is an integer greater than or equal to 0, and t is a subframe length of one subframe, and it should be noted that
  • the length of the sub-frame may be the length of the downlink subframe, the length of the uplink subframe, or the extent of other types of subframes.
  • the base station side and the terminal equipment side pre-arrange, which is not limited in this application.
  • the second indication information may be information preset by the base station and the terminal device; or the information sent by the base station to the terminal device by using a system message or a radio resource control (English: Radio Resource Control, RRC for short); Or the information that the base station sends to the terminal device through the DCI; or the base station receives the information reported by the terminal device.
  • RRC Radio Resource Control
  • Step 205 The terminal device sends the HARQ-ACK feedback information to the base station in the target TTI.
  • each HARQ-ACK feedback information may be sent in a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). This embodiment does not limit this.
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • Step 206 The base station receives HARQ-ACK feedback information from the terminal device in the target TTI.
  • Step 207 The base station decodes the HARQ-ACK feedback information according to the second indication information.
  • the HARQ-ACK feedback method determines the destination according to the first indication information in the DCI after receiving the DCI corresponding to the at least one downlink data and the at least one downlink data sent by the network device.
  • the TTI is further generated, and then the HARQ-ACK feedback information that needs to be fed back in the target TTI is generated, and the generated HARQ-ACK feedback information is sent to the network device in the target TTI; the terminal device cannot correctly feed the HARQ-ACK feedback in the prior art.
  • the problem of information reaches the effect that even if there is packet loss after the last downlink data before receiving the target TTI, the terminal device can correctly feed back the corresponding HARQ-ACK feedback information.
  • the base station may use the dynamic scheduling DCI to schedule the HARQ-ACK feedback information corresponding to the sent downlink data.
  • the base station does not have a periodic packet service, but only a data service.
  • FTP File Transfer Protocol
  • the base station adopts dynamic scheduling.
  • the base station may also adopt an SPS.
  • SPS Voice over Internet Protocol
  • the base station can also adopt dynamic scheduling and semi-static scheduling at the same time. Specifically, when there are both periodic packet services and data services, the base station adopts dynamic scheduling and SPS. Therefore, the above three cases will be described separately.
  • each downlink data may be sent by using a single codeword or multiple codewords, and the HARQ-ACK feedback information corresponding to each downlink data may correspond to one HARQ-ACK bit.
  • the downlink data adopts L codewords. If the transmission is performed, the downlink data corresponds to one HARQ-ACK bit; or, each codeword corresponds to one HARQ-ACK bit.
  • the downlink data is transmitted by using L codewords, and each downlink data corresponds to L HARQ-ACKs. Bit, this application does not limit. Unless otherwise stated, the following row data is exemplified by one HARQ-ACK bit.
  • the first type when the base station adopts dynamic scheduling, the base station sends the DCI corresponding to the downlink data when transmitting each downlink data.
  • the DCI also includes the number of the downlink data.
  • the DCI includes a downlink allocation index (English: Downlink Assignment Index, DAI for short), and the DAI is the number of the downlink data.
  • step 204 can include:
  • the terminal device determines, according to the respective downlink data received before the target TTI and the first indication information corresponding to each downlink data, the first HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the terminal device may demodulate the determined downlink data, and determine HARQ-ACK feedback information corresponding to each downlink data according to the demodulation result. Specifically, for a certain downlink data, if the terminal device demodulates successfully, the terminal device determines that the HARQ-ACK feedback information corresponding to the downlink data is an ACK, and if the terminal device fails to demodulate, the terminal device determines the downlink data.
  • the corresponding HARQ-ACK feedback information is not acknowledged (English: NACKnowledge, abbreviated as: NACK).
  • the packet loss may occur in the process of sending the downlink data by the base station.
  • the terminal device may detect whether there is a downlink data packet loss according to the determined number of each downlink data.
  • the downlink data loss packet determines that the HARQ-ACK feedback information corresponding to the lost downlink data is NACK feedback information. Specifically, the terminal device can detect whether the number of each downlink data is continuous. If not, the terminal device can determine that the downlink data corresponding to the lost number is lost. At this time, the terminal device can determine the HARQ corresponding to the lost downlink data.
  • the -ACK feedback information is NACK.
  • the DAIs in the DCI corresponding to the respective downlink data received by the terminal device are: 1, 3, 4, and 6, and the downlink data demodulation of the DAI is 1, 3, and 6 after the terminal device demodulates the downlink data. If the DAI is 4, the downlink data demodulation fails, and the terminal device can detect the downlink data loss with the DAI of 2 and 5.
  • the first HARQ in the target TTI determined by the terminal device is determined.
  • the ACK feedback information is: ACK, NACK, ACK, NACK, NACK, NACK, and ACK.
  • the packet loss mentioned here may be that the base station sends downlink data and the terminal device is not connected. Received, or the base station does not send downlink data, which is not limited in this embodiment.
  • the first HARQ-ACK feedback information determined by the terminal device in the target TTI is: ACK, ACK, NACK, NACK, ACK, ACK, NACK, NACK, NACK, NACK, ACK, and ACK.
  • the terminal device determines the second HARQ-ACK feedback information in the target TTI according to the second indication information.
  • the terminal device determines that the number of HARQ-ACK feedback information in the target TTI is indicated in the second indication information.
  • the number Specifically, when the number of the first HARQ-ACK feedback information determined by the terminal device is equal to the number indicated by the second indication information, the second HARQ-ACK feedback information does not exist; the first HARQ-ACK feedback determined by the terminal device The number of the information is smaller than the number of bits indicated by the second indication information, and the second HARQ-ACK feedback information determined by the terminal device is n NACK feedback information, where n is the number of bits indicated by the second indication information and the first HARQ-ACK feedback. The difference in the number of messages.
  • the first HARQ-ACK feedback information determined by the terminal device is the HARQ-ACK feedback information shown in Table 1, and the number of bits indicated by the second indication information is 7 to illustrate that the first HARQ-ACK determined by the terminal device is The number is 6, and the terminal device determines that the second HARQ-ACK feedback information is a NACK.
  • the terminal device determines that the obtained HARQ-ACK feedback information in the target TTI is ACK, NACK, ACK, NACK, NACK, ACK, and NACK.
  • the step may include:
  • the base station can continuously send downlink data to the terminal device, and correspondingly, the terminal device can also receive the downlink data continuously sent by the base station.
  • the terminal device detects whether there is unreceived downlink data according to the first indication information corresponding to the last downlink data received before the target TTI and the preset feedback delay.
  • the step includes: detecting whether the feedback delay of the last downlink data received before the target TTI is greater than a preset feedback delay, and if the detection result is greater than, Explained in After receiving the last downlink data, the base station may also send other downlink data. At this time, the terminal device may determine that there is unreceived downlink data. If the detection result is not greater than, it is determined that there is no unreceived downlink data.
  • the feedback delay of the last downlink data is 4TTI
  • the preset feedback delay is 2TTI
  • the terminal device determines that there are two downlink data that are not received before the target TTI after the last downlink data.
  • the step includes: calculating a first difference between the TTI and the target TTI of the last downlink data, and detecting whether the calculated first difference is greater than a preset.
  • the feedback delay if greater than, indicates that the base station may also send other downlink data after the last downlink data, and the terminal device may determine that there is downlink data that is not received; and if the detection result is not greater than, it is determined that there is no Received downlink data.
  • the difference between the TTI of the last downlink data received before the target TTI and the target TTI is 5 TTI, and the preset feedback delay is 2 TTI, and the terminal device determines that the target TTI is obtained after receiving the last downlink data.
  • the terminal device determines that the target TTI is obtained after receiving the last downlink data.
  • the terminal device determines, according to the detected number of unreceived downlink data, the second HARQ-ACK feedback information that needs to be fed back in the target TTI.
  • the step includes: determining that the number of unreceived downlink data is the feedback delay of the last downlink data received before the target TTI and the preset feedback time.
  • the difference is determined by determining the number of NACK feedback information of the calculated difference.
  • the step includes: determining that the number of unreceived downlink data is a second difference between the first difference and the preset feedback delay, determining the quantity. NACK feedback information for the second difference.
  • the NACK feedback information determined in this step is the second HARQ-ACK feedback information.
  • the HARQ-ACK feedback information determined by the terminal device in the target TTI includes the first HARQ-ACK feedback information and the second HARQ-ACK feedback information.
  • the first HARQ-ACK feedback information determined by the terminal device is shown in Table 1.
  • the delay corresponding to the last downlink data is 4TTI, and the preset feedback delay is 2TTI.
  • the HARQ-ACK feedback information determined by the device in the target TTI is: ACK, NACK, ACK, NACK, NACK, ACK, NACK, and NACK.
  • the terminal device determines that the obtained HARQ-ACK feedback information in the target TTI is the first HARQ-ACK feedback information.
  • the first HARQ-ACK feedback information determined by the terminal device is shown in Table 1.
  • the delay corresponding to the last downlink data is 2TTI
  • the preset feedback delay is 2TTI.
  • the HARQ-ACK feedback information determined by the device in the target TTI is: ACK, NACK, ACK, NACK, NACK, and ACK.
  • the base station may not schedule some TTIs that can be used for downlink data transmission.
  • the terminal device does not feed back the TTI corresponding to the unscheduled TTI available for downlink data transmission.
  • HARQ-ACK feedback information For example, referring to FIG. 3C, the terminal device determines that the obtained HARQ-ACK feedback information is: ACK, NACK, ACK, NACK, NACK, ACK, NACK, and NACK.
  • step 201 may include: the base station sends the DCI to the terminal device, and the DCI includes The field for indicating the SPS and the first indication information, the DCI is used to activate the SPS transmission; after that, the base station sends the downlink data to the terminal device according to the preset time interval.
  • the downlink data of each SPS transmitted by the base station after the DCI is corresponding to the DCI, and the first indication information is indication information corresponding to each downlink data in the semi-persistent scheduling process.
  • step 204 can include:
  • the terminal device determines the first HARQ-ACK feedback information in the target TTI according to the respective downlink data and the first indication information.
  • the terminal device For each downlink data, the terminal device demodulates the received downlink data, and if the demodulation is successful, determining that the HARQ-ACK feedback information corresponding to the downlink data is an ACK; and if the demodulation fails, determining the downlink data.
  • the corresponding HARQ-ACK feedback information is NACK.
  • the terminal device since the base station sends the downlink data every predetermined time interval, if the terminal device does not receive the downlink data every predetermined time interval, the terminal device may determine that the downlink data is lost here, and the HARQ corresponding to the downlink data
  • the -ACK feedback information is NACK.
  • the base station may send the downlink data to the terminal device, and then send one downlink data to the terminal device every 10 TTIs.
  • the terminal device may determine the downlink data loss at the interval 10TTI. At this time, the terminal device may determine that the HARQ-ACK feedback information at the interval of 10 TTI is NACK.
  • the terminal device determines the second HARQ-ACK feedback information in the target TTI according to the second indication information.
  • This step is similar to the implementation of the dynamic scheduling, and is not described here.
  • the implementation when the base station adopts the dynamic scheduling and the SPS at the same time, the implementation may be combined with the foregoing two implementation manners, and details are not described herein again.
  • FIG. 3D shows that the dynamic scheduling and the SPS point to the same target TTI, and the preset feedback delay is 2TTI, and the terminal device demodulates the downlink data of the semi-persistent scheduling successfully, and the downlink data of the dynamic scheduling is successfully performed.
  • the demodulation case is as shown in Table 1, the HARQ-ACK feedback information determined by the terminal device.
  • the terminal device may sort the determined respective HARQ-ACK feedback information, and feed back the determined HARQ-ACK feedback information to the base station.
  • the HARQ-ACK feedback information sorted according to the preset order is fed back to the base station.
  • the terminal device may sort the HARQ-ACK feedback information according to the number of the downlink data from small to large, and the downlink data that is lost between the last downlink data and the target TTI.
  • the corresponding HARQ-ACK feedback information is arranged last.
  • the terminal device may be arranged in descending order of the number of the downlink data, which is not limited in this embodiment.
  • the terminal equipment performs sorting according to the time sequence in which the corresponding downlink data is received.
  • the terminal device may perform the sorting according to the foregoing two sortings, or the HARQ-ACK feedback information of the SPS scheduling is arranged at the front or the end, which is not limited in this embodiment.
  • the terminal device determines the second HARQ-ACK according to the above method. After the feedback information, the terminal device needs to remove the HARQ-ACK feedback information corresponding to the TTI that is not used for downlink data transmission in the determined second HARQ-ACK. For example, if the method is used in a system for fixing a subframe ratio, the terminal device can learn whether there is a TTI not used for downlink data transmission between the last downlink data and the target TTI according to the subframe ratio.
  • the second indication information may be: information that the base station and the terminal device pre-agreed, or information that the base station sends to the terminal device, or the terminal device sends the information to the base station. Information.
  • the second indication information is configured by the base station to the terminal device, as a possible implementation manner, the second indication information is included in the DCI corresponding to the at least one downlink data sent by the base station; as another possible implementation manner, refer to 3E, before step 204, the method further includes the following steps:
  • Step 208 The base station sends the second indication information to the terminal device by using a system message or RRC signaling.
  • Step 209 The terminal device receives the second indication information from the system message or the RRC signaling.
  • the terminal device may send the acknowledgement information to the base station, which is not limited in this embodiment.
  • the method may further include the following steps:
  • Step 210 The terminal device sends second indication information to the base station.
  • the terminal device may report the second indication information to the base station, or the terminal device reports the second indication information to the base station after receiving the report request sent by the base station.
  • the terminal device may report a preset feedback delay to the base station by using the PUCCH or the PUSCH.
  • Step 211 The base station receives the second indication information.
  • the base station may return the acknowledgement information to the terminal device.
  • the foregoing steps on the base station side may be separately implemented as a HARQ-ACK feedback method on the base station side
  • the step on the terminal device side may be separately implemented as a HARQ-ACK feedback method on the terminal device side.
  • the numbering of the steps does not mean the order of execution, and the order of execution of each step should be determined by its function and internal logic, and should not be limited to the implementation process of the embodiments of the present application.
  • FIG. 4 is a schematic structural diagram of a HARQ-ACK feedback apparatus provided by an embodiment of the present application.
  • the HARQ-ACK feedback apparatus can be used in a network device.
  • the HARQ-ACK feedback device may include a transmitting unit 410, a receiving unit 420, and a decoding unit 430.
  • the sending unit 410 is configured to send, to the terminal device, at least one downlink data and downlink control information DCI corresponding to the at least one downlink data, where the DCI includes first indication information, where the first indication information is used to indicate that the at least a target transmission time interval TTI of the HARQ-ACK feedback information corresponding to the downlink data, where the HARQ-ACK feedback information is used to indicate a reception status of the at least one downlink data;
  • the receiving unit 420 is configured to receive the HARQ-ACK feedback information from the terminal device in the target TTI;
  • the decoding unit 430 is configured to decode the HARQ-ACK feedback information according to the second indication information, where the second indication information is used to indicate the number of bits of the HARQ-ACK feedback information.
  • the HARQ-ACK feedback apparatus sends the at least one downlink data and the DCI corresponding to the at least one downlink data to the terminal device, so that the terminal device receives the DCI sent by the network device.
  • the target TTI is determined according to the first indication information in the DCI, and then the HARQ-ACK feedback information that needs to be fed back in the target TTI is generated, and then the generated HARQ-ACK feedback information is fed back to the network device in the target TTI;
  • the problem that the terminal device cannot correctly feed back the HARQ-ACK in the prior art is solved, and the terminal device can correctly feed back the corresponding HARQ-ACK even if there is packet loss after the last downlink data before receiving the target TTI. Effect.
  • the second indication information includes a preset feedback delay
  • the second indication information indicates the number of bits of the HARQ-ACK feedback information by using the preset feedback delay
  • the network device and the terminal device pre-store the second indication information; or
  • the network device receives the second indication information from the terminal device.
  • the first indication information includes:
  • the feedback delay is a time difference between the target TTI and a TTI for transmitting the downlink data
  • the number of the target TTI is the number of the target TTI.
  • the DCI further includes:
  • the number of the at least one downlink data is the number of the at least one downlink data.
  • FIG. 5 is a schematic structural diagram of a HARQ-ACK feedback apparatus provided by an embodiment of the present application.
  • the HARQ-ACK feedback apparatus may be used in a terminal device.
  • the HARQ-ACK feedback device may include: a receiving unit 510, a generating unit 520, and a transmitting unit 530.
  • the receiving unit 510 is configured to receive at least one downlink data sent by the network device and downlink control information DCI corresponding to the at least one downlink data, where the DCI includes first indication information, where the first indication information is used to indicate that the a target transmission time interval TTI of the HARQ-ACK feedback information corresponding to the at least one downlink data, where the HARQ-ACK feedback information is used to indicate a receiving state of the at least one downlink data;
  • the generating unit 520 is configured to generate the HARQ-ACK feedback information according to the second indication information, where the second indication information is used to indicate the number of bits of the HARQ-ACK feedback information;
  • the sending unit 530 is configured to send the HARQ-ACK feedback information to the network device in the target TTI.
  • the HARQ-ACK feedback apparatus determines the target TTI according to the first indication information in the DCI after receiving the DCI corresponding to the at least one downlink data and the at least one downlink data sent by the network device. And then generating the HARQ-ACK feedback information that needs to be fed back in the target TTI, and then feeding back the generated HARQ-ACK feedback information to the network device in the target TTI; solving the problem that the terminal device cannot correctly feed back the HARQ-ACK feedback information in the prior art.
  • the problem is that even if there is packet loss after the last downlink data before receiving the target TTI, the terminal device can correctly feed back the effect of the corresponding HARQ-ACK feedback information.
  • the second indication information includes a preset feedback delay
  • the second indication information indicates the number of bits of the HARQ-ACK feedback information by using the preset feedback delay
  • the network device and the terminal device pre-store the second indication information; or
  • the terminal device Receiving, by the terminal device, the second indication information from a system message or a radio resource control RRC signaling;
  • the terminal device sends the second indication information to the network device.
  • the generating unit 520 is further configured to:
  • the second HARQ-ACK feedback information that needs to be fed back in the target TTI is determined according to the detected number of unreceived downlink data.
  • the DCI further includes a number of the at least one downlink data, where the generating unit 520 is further configured to:
  • the HARQ-ACK corresponding to the lost downlink data is NACK feedback information.
  • the generating unit 520 is further configured to:
  • the HARQ-ACK corresponding to the lost downlink data is NACK feedback information.
  • the generating unit 520 is further configured to:
  • the HARQ-ACK feedback information that is sorted in a preset order to the network device, where the preset order is an order agreed in advance with the network device.
  • the first indication information includes:
  • the feedback delay is a time difference between the target TTI and a TTI for transmitting the downlink data
  • the number of the target TTI is the number of the target TTI.
  • the base station and the terminal device include corresponding hardware structures and/or software modules for performing respective functions.
  • the embodiments of the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements of the examples and algorithm steps described in the embodiments disclosed in the application. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present application.
  • FIG. 6 is a schematic diagram showing a possible structure of a network device according to an embodiment of the present application.
  • Base station 600 includes a transmitter/receiver 601 and a processor 602.
  • the processor 602 can also be a controller, which is represented as "controller/processor 602" in FIG.
  • the transmitter/receiver 601 is configured to support the base station to transmit and receive information with the terminal device in the foregoing embodiment, and to support radio communication between the terminal device and other terminal devices.
  • the processor 602 performs various functions for communicating with a terminal device.
  • On the uplink an uplink signal from the terminal device is received via an antenna, demodulated by the receiver 601 (eg, demodulating the high frequency signal into a baseband signal), and further processed by the processor 602 to recover the terminal.
  • the service data and signaling information sent by the device is transmitted by the device.
  • traffic data and signaling messages are processed by processor 602 and modulated by transmitter 601 (e.g., modulating a baseband signal into a high frequency signal) to produce a downlink signal that is transmitted to the terminal via an antenna. device.
  • transmitter 601 e.g., modulating a baseband signal into a high frequency signal
  • processor 602 is also operative to perform processes 201 and 206 of FIG. 2, and/or other processes of the technical solutions described herein.
  • the base station 600 may further include a memory 603 for storing program codes and data of the base station 600. Further, the base station may further include a communication unit 604.
  • the communication unit 604 is configured to support the base station to communicate with other network entities (such as network devices in the core network, etc.).
  • the communication unit 604 may be an S1-U interface for supporting the base station to communicate with a serving gateway (English: Serving Gateway, SGW for short); or the communication unit 604 may be an S1-MME.
  • An interface is used to support communication between a base station and a mobility management entity (English: Mobility Management Entity, MME for short).
  • Figure 6 only shows a simplified design of base station 600.
  • the base station 600 can include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the embodiments of the present application are in the protection scope of the embodiments of the present application. Inside.
  • FIG. 7 is a simplified schematic diagram showing a possible design structure of a terminal device involved in the embodiment of the present application.
  • the terminal device 700 includes a transmitter 701, a receiver 702, and a processor 703.
  • the processor 703 may also be a controller, and is represented as "controller/processor 703" in FIG.
  • the terminal device 700 may further include a modem processor 705, where the modem processor 705 may include an encoder 706, a modulator 707, a decoder 708, and a demodulator 709.
  • the transmitter 701 conditions (eg, analog transforms, filters, amplifies, and upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. .
  • the antenna receives the downlink signal transmitted by the base station in the above embodiment.
  • Receiver 702 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • encoder 706 receives the traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages.
  • Modulator 707 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples.
  • Demodulator 709 processes (e.g., demodulates) the input samples and provides symbol estimates.
  • the decoder 708 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages that are sent to the terminal device 700.
  • Encoder 706, modulator 707, demodulator 709, and decoder 708 may be implemented by a composite modem processor 705. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems). It should be noted that when the terminal device 700 does not include the modem processor 705, the above functions of the modem processor 705 may also be completed by the processor 703.
  • the processor 703 controls and manages the operations of the terminal device 700, and is used to perform the processing performed by the terminal device 700 in the foregoing embodiment of the present application.
  • the processor 703 is also configured to perform the processes 202, 203, 204 of FIG. 205, and/or other processes of the technical solutions described herein.
  • the terminal device 700 may further include a memory 704 for storing program codes and data for the terminal device 700.
  • the processor for performing the functions of the foregoing base station or the terminal device in the embodiment of the present application may be a central processing unit (English: Central Processing Unit, CPU for short), a general-purpose processor, and a digital signal processor (English: Digital Signal Processor, referred to as :DSP), ASIC: (Application-Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware A component or any combination thereof. It is possible to implement or perform various exemplary logical blocks, modules and circuits described in connection with the disclosure of the embodiments of the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the steps of the method or algorithm described in connection with the disclosure of the embodiments of the present application may be implemented in a hardware manner, or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, and the software modules may be stored in a random access memory (English: Random Access Memory, RAM for short), flash memory, read only memory (English: Read Only Memory, referred to as: ROM), Erase programmable read-only memory (English: Erasable Programmable ROM, referred to as: EPROM), electrically erasable programmable read-only memory (English: Electrically EPROM, referred to as: EEPROM), registers, hard disk, mobile hard disk, read-only optical disk (English) : CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a base station or terminal device.
  • the processor and the storage medium may also exist as discrete components in a base station or terminal device.
  • the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.
  • the embodiment of the present application further provides a HARQ-ACK feedback device, where the device includes a processor and a memory, where the memory stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one segment
  • the program, the code set, or the instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the network device side in the above embodiment.
  • the embodiment of the present application further provides a computer readable storage medium, where the storage medium stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one program, the code set, or the The instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the network device side in the above embodiment.
  • the embodiment of the present application further provides a HARQ-ACK feedback device, where the device includes a processor and a memory, where the memory stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one segment
  • the program, the code set, or the instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the terminal device side in the above embodiment.
  • the embodiment of the present application further provides a computer readable storage medium, where the storage medium stores at least one instruction, at least one program, a code set, or a set of instructions, the at least one instruction, the at least one program, the code set, or the The instruction set is loaded and executed by the processor to implement the HARQ-ACK feedback method on the terminal device side in the above embodiment.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本申请实施例提供了一种HARQ-ACK反馈方法和装置，涉及通信领域，所述方法包括：网络设备发送至少一个下行数据以及至少一个下行数据对应的DCI至终端设备；终端设备接收至少一个下行数据以及至少一个下行数据对应的DCI，DCI中包括第一指示信息，第一指示信息用于指示传输至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI；终端设备根据第二指示信息生成在目标TTI中需要反馈的HARQ-ACK反馈信息，第二指示信息用于指示目标TTI中需要反馈的HARQ-ACK的比特数；终端设备在目标TTI中发送生成的HARQ-ACK反馈信息至网络设备。网络设备在目标TTI中，接收终端设备反馈的HARQ-ACK反馈信息，根据第二指示信息解码HARQ-ACK反馈信息。解决了现有技术中终端设备无法正确反馈HARQ-ACK反馈信息的问题。

Description

混合自动重传请求确认HARQ-ACK反馈方法和装置
本申请要求于2016年8月12日提交中国专利局、申请号为201610666672.5、发明名称为“混合自动重传请求确认HARQ-ACK反馈方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，特别涉及一种混合自动重传请求确认HARQ-ACK反馈方法和装置。
背景技术
长期演进(英文：Long Term Evolution，简称：LTE)系统采用混合自动重传请求确认(英文：Hybrid Automatic Repeat Request Acknowledgement，简称：HARQ-ACK)机制，并且不论是频分双工(英文：Frequency Duplexing Division，简称：FDD)系统还是时分双工(英文：Time Duplexing Division，简称：TDD)系统，HARQ-ACK反馈的时序都是固定的。
具体的，在FDD系统中，终端设备在第n个子帧接收到下行数据之后，会在第n+4个子帧反馈HARQ-ACK反馈信息，n为整数。而在TDD系统中，预先约定好在每个上行子帧中需要反馈的下行子帧的子帧号，进而在接收到在下行子帧发送的下行数据时，通过对应的上行子帧反馈HARQ-ACK反馈信息。比如，在上下行子帧配比为3的系统中，预先约定第n个上行子帧用于反馈n-4和n-5这两个下行子帧中的下行数据所对应的HARQ-ACK反馈信息。
发明人在实现本申请的过程中，发现上述过程至少存在如下问题：
随着通信系统的演进，基站可以灵活的进行资源调度，也即基站可以将多个下行子帧所对应的HARQ-ACK反馈信息调度到一个上行子帧上进行反馈；然而对于灵活调度的情况，终端设备只能根据接收到的下行数据来反馈HARQ-ACK反馈信息，而由于数据传输过程中可能会发生丢包，因此终端设备接收到的下行数据的个数可能会小于基站实际发送的个数，因此，终端设备将无法正确反馈HARQ-ACK反馈信息。
发明内容
为了解决现有技术中终端设备可能无法正确反馈HARQ-ACK的问题，本申请实施例提供了一种HARQ-ACK反馈方法和装置，所述技术方案如下：
第一方面，提供了一种HARQ-ACK反馈方法，该方法包括：
网络设备发送至少一个下行数据以及该至少一个下行数据对应的下行控制信息(英文：Downlink Control Information，简称：DCI)至终端设备，相应的，终端设备接收至少一个下行数据以及至少一个下行数据对应的DCI。其中，DCI中携带有第一指示信息，该第一指 示信息用于指示传输至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔(英文：Transmission Time Interval，简称：TTI)。
可选地，对于动态调度的情况，每个下行数据可以对应于一个DCI。而对于半静态调度(英文：Semi-Persistent Scheduling，简称：SPS)的情况，该至少一个下行数据可以对应于同一个DCI，在此不做限定。
另外，该第一指示信息可以为至少一个下行数据的反馈时延，该反馈时延为目标TTI与传输下行数据的TTI的时间差。可选地，该第一指示信息还可以为反馈下行数据所对应的HARQ-ACK反馈信息的目标TTI的编号。目标TTI为用于反馈下行数据所对应的HARQ-ACK反馈信息的TTI。
HARQ-ACK反馈信息用于指示至少一个下行数据的接收状态。该接收状态可以为成功接收或者接收失败。
终端设备接收到至少一个下行数据以及对应的DCI之后，终端设备可以根据DCI中的第一指示信息确定反馈下行数据所对应的HARQ-ACK反馈信息的目标TTI，并生成在目标TTI中向网络设备发送的HARQ-ACK反馈信息。其中，第二指示信息用于指示目标TTI中需要反馈的HARQ-ACK反馈信息的比特数。
终端设备生成需要反馈的HARQ-ACK反馈信息之后，在目标TTI中反馈生成的HARQ-ACK反馈信息至网络设备。相应的，网络设备可以接收终端设备在目标TTI中反馈的HARQ-ACK反馈信息，并在接收到之后，根据第二指示信息解码HARQ-ACK反馈信息。可选地，终端设备反馈生成的HARQ-ACK反馈信息时，可以对确定的HARQ-ACK反馈信息进行编码调制，映射到上行信道，然后通过上行信道发送该HARQ-ACK反馈信息至网络设备。
通过在接收到网络设备发送的至少一个下行数据和至少一个下行数据对应的DCI之后，根据该DCI中的第一指示信息确定目标TTI，进而之后生成在目标TTI中需要反馈的HARQ-ACK反馈信息，在目标TTI中反馈生成的HARQ-ACK反馈信息至网络设备；解决了现有技术中终端设备无法正确反馈HARQ-ACK反馈信息的问题，达到了即使在接收到目标TTI之前最后一个下行数据之后存在丢包，终端设备也能正确的反馈其对应的HARQ-ACK反馈信息的效果。
该第二指示信息为网络设备与终端设备预先约定的信息。具体的，该第二指示信息可以为网络设备与终端设备中预先设定的信息，或者是网络设备通过DCI向终端设备发送的信息，又或者是网络设备通过系统消息或者无线资源控制(英文：Radio Resource Control，简称：RRC)信令向终端设备发送的信息，再或者是终端设备上报的信息
在一种可能的实现方式中，第二指示信息包括预设的反馈时延，该第二指示信息通过预设的反馈时延指示HARQ-ACK反馈信息的比特数。
在另一种可能的实现方式中，网络设备还可以指定反馈下行数据所对应的HARQ-ACK反馈信息的目标TTI中总共需要反馈的HARQ-ACK反馈信息的比特数，也即该第二指示信息还可以用于指示反馈下行数据所对应的HARQ-ACK反馈信息的目标TTI中总共需要反馈的HARQ-ACK反馈信息的比特数。
在再一种可能的实现方式中，终端设备生成在目标TTI中需要反馈的HARQ-ACK反馈 信息的步骤可以包括：
终端设备根据在目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在目标TTI中需要反馈的第一HARQ-ACK反馈信息；
终端设备根据在目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及预设的反馈时延，检测在接收到最后一个下行数据之后目标TTI之前是否存在未接收到的下行数据；
若检测结果为存在未接收到的下行数据，则终端设备根据检测到的未接收到的下行数据的个数，确定在目标TTI中需要反馈的第二HARQ-ACK反馈信息。
实际实现时，DCI中还可以包括下行数据的编号，此时，终端设备确定第一HARQ-ACK反馈信息的步骤可以包括：
对于每个下行数据，终端设备根据对每个下行数据的解调结果确定下行数据所对应的HARQ-ACK反馈信息；
终端设备根据接收到的各个下行数据的编号检测是否存在丢包；
若检测结果为存在丢包，则终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
若网络设备存在采用半静态调度，此时，终端设备确定第一HARQ-ACK反馈信息的步骤还可以包括：
对于每个下行数据，终端设备根据对下行数据的解调结果确定下行数据所对应的HARQ-ACK反馈信息；
在终端设备接收到DCI之后，检测在目标TTI之前每隔预定时间间隔处是否存在丢包；
若检测结果为存在丢包，则终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
在再一种可能的实现方式中，由于终端设备确定的HARQ-ACK反馈信息的个数可能有至少两个，此时终端设备反馈确定的HARQ-ACK反馈信息至网络设备的步骤可以包括：
在目标TTI中反馈按照预设顺序排序的HARQ-ACK反馈信息至网络设备，预设顺序为与网络设备预先约定的顺序。
通过反馈按照预设顺序排序的各个HARQ-ACK反馈信息，该预设顺序为与网络设备约定好的顺序，使得网络设备可以根据接收到的各个HARQ-ACK反馈信息正确的获知哪些数据成功发送，而哪些数据发送失败。
需要说明的是，上述关于网络设备侧的步骤可以单独实现成为网络设备侧的HARQ-ACK反馈方法，而关于终端设备侧的步骤可以单独实现成为终端设备侧的HARQ-ACK反馈方法。
第二方面，提供了一种HARQ-ACK反馈装置，所述HARQ-ACK反馈装置包括至少一个单元，该至少一个单元用于实现上述第一方面中网络设备侧的HARQ-ACK反馈方法。
第三方面，提供了一种HARQ-ACK反馈装置，所述HARQ-ACK反馈装置包括至少一个单元，该至少一个单元用于实现上述第一方面中终端设备侧的HARQ-ACK反馈方法。
第四方面，本申请提供一种HARQ-ACK反馈装置，该装置包括处理器和存储器，该存储器中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至 少一段程序、该代码集或该指令集由该处理器加载并执行以实现第一方面中网络设备侧的HARQ-ACK反馈方法。
第五方面，本申请提供一种计算机可读存储介质，该存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由处理器加载并执行以实现第一方面中网络设备侧的HARQ-ACK反馈方法。
第六方面，本申请提供一种HARQ-ACK反馈装置，该装置包括处理器和存储器，该存储器中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由该处理器加载并执行以实现第一方面中终端设备侧的HARQ-ACK反馈方法。
第七方面，本申请提供一种计算机可读存储介质，该存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由处理器加载并执行以实现第一方面中终端设备侧的HARQ-ACK反馈方法。
附图说明
图1是本申请各个实施例所涉及的实施环境的示意图。
图2是本申请一个实施例提供的HARQ-ACK反馈方法的方法流程图。
图3A是本申请一个实施例提供的终端设备确定的HARQ-ACK反馈信息的示意图。
图3B是本申请一个实施例提供的终端设备确定的HARQ-ACK反馈信息的另一示意图。
图3C是本申请一个实施例提供的终端设备确定的HARQ-ACK反馈信息的再一示意图。
图3D是本申请一个实施例提供的终端设备确定的HARQ-ACK反馈信息的再一示意图。
图3E是本申请一个实施例提供的HARQ-ACK反馈方法的另一方法流程图。
图3F是本申请一个实施例提供的HARQ-ACK反馈方法的再一方法流程图。
图4是本申请一个实施例提供的HARQ-ACK反馈装置的结构示意图。
图5是本申请一个实施例提供的HARQ-ACK反馈装置的结构示意图。
图6是本申请一个实施例提供的网络设备的结构示意图。
图7是本申请一个实施例提供的终端设备的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参考图1，其示出了本申请各个实施例提供的HARQ-ACK反馈方法所涉及的实施环境的示意图，如图1所示，该实施环境可以包括：网络设备110和终端设备120。
网络设备110可以为基站、服务器或者终端设备，下述实施例以网络设备为基站来举例。实际实现时，该网络设备可以通过有线或者无线网络与终端设备120连接。
终端设备120可以为诸如手机、平板电脑或者电子阅读器之类的设备。
请参考图2，其示出了本申请一个实施例提供的HARQ-ACK反馈方法的方法流程图，本实施例以该HARQ-ACK反馈方法用于图1所示的实施环境中来举例说明。如图2所示，该HARQ-ACK反馈方法可以包括如下步骤：
步骤201，基站向终端设备发送至少一个下行数据以及至少一个下行数据对应的下行控制信息(英文：Downlink Control Information，简称：DCI)，DCI中包括第一指示信息。
第一指示信息用于指示传输至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔(英文：Transmission Time Interval，简称：TTI)。具体的，该第一指示信息可以包括如下两种：
第一种，至少一个下行数据的反馈时延，该反馈时延为传输至少一个下行数据的TTI与反馈该下行数据所对应的HARQ-ACK反馈信息的目标TTI之间的时间差。
其中，该时间差可以用TTI的个数表示。比如，第一指示信息可以为K，则K*TTI长度为所述时间差，K为大于等于0的整数，需要说明的是，TTI长度可以是下行TTI的长度，也可以是上行TTI的长度，也可以是其它类型TTI的长度，基站侧和终端设备侧可以预先约定，本申请不做限定。
可选地，该时间差还可以通过子帧个数表示。比如，该第一指示信息可以为J,则J*t为所述时间差，J为大于等于0的整数，t为一个子帧的子帧长度，需要说明的是，所述子帧长度可以是下行子帧的长度，也可以是上行子帧的长度，也可以是其它类型子帧的长度，基站侧和终端设备侧可以预先约定，本申请不做限定。
可选地，该时间差可以用绝对时间表示。比如，该第一指示信息可以为M，则M*Ts为所述时间差，M为大于等于0的整数，Ts为基站和终端设备预先约定的时间单位，Ts的单位可以是毫秒，也可以为微秒，或者其他值，本申请不做限制。
第二种，反馈每个下行数据所对应的HARQ-ACK反馈信息的目标TTI的编号。
比如，第一指示信息可以为20，该第一指示信息表示在编号为20的目标TTI中反馈下行数据所对应的HARQ-ACK反馈信息。可选的，所述TTI的编号可以是在无线帧中的相对编号。
步骤202，终端设备接收基站发送的至少一个下行数据以及至少一个下行数据对应的DCI。
步骤203，终端设备根据第一指示信息，确定反馈至少一个下行数据所对应的HARQ-ACK反馈信息的目标TTI。
若第一指示信息为下行数据的反馈时延，则终端设备接收到下行数据之后，将从接收到下行数据的TTI起，延迟该反馈时延后的TTI确定为目标TTI。
比如，第一指示信息为K，K*TTI为所述反馈时延，则终端设备将从接收到下行数据的TTI起，延迟K个TTI后的TTI确定为目标TTI。又比如，第一指示信息为J，J*t为所述反馈时延，则终端设备将接收到下行数据的子帧起，延迟J个子帧后的TTI确定为目标TTI。再比如，第一指示信息为M，M*Ts为所述反馈时延，则终端设备将接收到下行数据的子帧起，延迟M*Ts时间的TTI确定为目标TTI。
而若第一指示信息为反馈该下行数据所对应的HARQ-ACK反馈信息的目标TTI的编号，则终端设备直接将该编号所对应的TTI确定为目标TTI。
步骤204，终端设备根据第二指示信息生成在目标TTI中需要反馈的HARQ-ACK反馈信息。
具体的，终端设备确定目标TTI之后，在生成目标TTI中需要反馈的HARQ-ACK反馈信息时，终端设备可以根据接收到的每个下行数据所对应的第一指示信息，确定对应于该目标TTI的下行数据，然后根据确定的各个下行数据、每个下行数据所对应的第一指示信息以及第二指示信息，生成在目标TTI中需要反馈的HARQ-ACK反馈信息。其中，各个下行数据所对应的第一指示信息指向目标TTI。
第二指示信息为用于指示目标TTI中需要反馈的HARQ-ACK反馈信息的比特数的信息。具体的，第二指示信息可以为用于指示目标TTI中的HARQ-ACK反馈信息的总比特数的指示信息，或者，预设的反馈时延。预设的反馈时延为传输下行数据的TTI与反馈下行数据所对应的HARQ-ACK反馈信息的目标TTI的最小差值，预设的反馈时延为基站与终端设备预先约定的时延。
具体的，预设的反馈时延指示方式可以包括：
可选地，该预设的反馈时延可以用绝对时间表示。比如，所述第二指示信息可以为m，则m*ts为所述预设的反馈时延，m为大于等于0的整数，ts为网络设备和终端设备预先约定的时间单位，ts的单位可以是毫秒，也可以为微秒，或者其他值，本申请不做限制。
可选地，该预设的反馈时延可以用TTI的个数表示。比如，所述第二指示信息可以为k，则k*TTI长度为所述预设的反馈时延，k为大于等于0的整数，需要说明的是，所述TTI长度可以是下行TTI的长度，也可以是上行TTI的长度，也可以是其它类型TTI的长度，基站侧和终端设备侧预先约定，本申请不做限定。
可选地，该预设的反馈时延还可以通过子帧个数表示。比如，所述第二指示信息可以为j,则j*t为所述预设的反馈时延，j为大于等于0的整数，t为一个子帧的子帧长度，需要说明的是，所述子帧长度可以是下行子帧的长度，也可以是上行子帧的长度，也可以是其它类型子帧的程度，基站侧和终端设备侧预先约定，本申请不做限定。
实际实现时，第二指示信息可以为基站与终端设备预先设定的信息；或者，基站通过系统消息或者无线资源控制(英文：Radio Resource Control，简称：RRC)信令向终端设备发送的信息；或者，基站通过DCI向终端设备发送的信息；或者，基站接收终端设备上报的信息。
步骤205，终端设备在目标TTI中向基站发送HARQ-ACK反馈信息。
终端设备在反馈各个HARQ-ACK反馈信息时，终端设备可以对各个HARQ-ACK反馈信息进行编码调制，映射到上行信道，之后发送至基站。可选地，各个HARQ-ACK反馈信息可以在物理上行控制信道(英文：Physical Uplink Control Channel，简称：PUCCH)发送，也可以在物理上行共享信道(英文：Physical Uplink Shared Channel，简称：PUSCH)发送，本实施例对此并不做限定。
步骤206，基站在目标TTI中从终端设备接收HARQ-ACK反馈信息。
步骤207，基站根据第二指示信息解码HARQ-ACK反馈信息。
综上所述，本实施例提供的HARQ-ACK反馈方法，通过在接收到网络设备发送的至少一个下行数据和至少一个下行数据对应的DCI之后，根据该DCI中的第一指示信息确定目 标TTI，进而之后生成在目标TTI中需要反馈的HARQ-ACK反馈信息，在目标TTI中发送生成的HARQ-ACK反馈信息至网络设备；解决了现有技术中终端设备无法正确反馈HARQ-ACK反馈信息的问题，达到了即使在接收到目标TTI之前最后一个下行数据之后存在丢包，终端设备也能正确的反馈其对应的HARQ-ACK反馈信息的效果。
在上述实施例中，基站可以采用动态调度DCI对发送的下行数据所对应的HARQ-ACK反馈信息进行调度。具体的，在基站没有周期性小包业务，而只有数据业务，比如，只有文件传输协议(英文：File Transfer Protocol，简称：FTP)业务时，基站采用动态调度。可选地，基站还可以采用SPS。具体的，在只存在周期性小包业务，比如，只有网络电话(英文：Voice over Internet Protocol，简称：VoIP)时，采用SPS。可选地，基站还可以同时采用动态调度和半静态调度。具体的，在既有周期性小包业务，也有数据业务时，基站采用动态调度和SPS。因此，下述将分别对上述三种情况进行说明。
需要说明的是，每个下行数据可以使用单个码字或者多个码字发送，每个下行数据所对应的HARQ-ACK反馈信息可以对应一个HARQ-ACK比特，比如，下行数据采用L个码字发送，则下行数据对应于一个HARQ-ACK比特；或者，每个码字对应于一个HARQ-ACK比特，比如，下行数据使用L个码字发送，则每个下行数据对应于L个HARQ-ACK比特，本申请不做限制。下述除特殊说明外均以下行数据对应一个HARQ-ACK比特来举例说明。
第一种，当基站采用动态调度时，基站在发送每个下行数据时发送该下行数据对应的DCI。并且，该DCI中还包括该下行数据的编号。具体的，DCI中包括下行分配索引(英文：Downlink Assignment Index，简称：DAI)，该DAI即为下行数据的编号。
此时，步骤204可以包括：
第一，终端设备根据在目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在目标TTI中需要反馈的第一HARQ-ACK反馈信息。
终端设备可以解调确定的各个下行数据，并根据解调结果确定每个下行数据所对应的HARQ-ACK反馈信息。具体的，对于某个下行数据，若终端设备解调成功，则终端设备确定该下行数据所对应的HARQ-ACK反馈信息为ACK，而若终端设备解调失败，则终端设备确定该下行数据所对应的HARQ-ACK反馈信息为不确认(英文：NACKnowledge，简称：NACK)。
实际实现时，由于基站发送下行数据的过程中，可能会发生丢包，因此，终端设备确定各个下行数据之后，终端设备可以根据确定的各个下行数据的编号检测是否存在下行数据丢包，若存在下行数据丢包，则确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK反馈信息。具体的，终端设备可以检测各个下行数据的编号是否连续，若不连续，则终端设备可以确定丢失的编号所对应的下行数据丢失，此时，终端设备可以确定丢失的该下行数据所对应的HARQ-ACK反馈信息为NACK。
比如，终端设备接收到的各个下行数据所对应的DCI中的DAI分别为：1、3、4和6，终端设备对各个下行数据解调之后，DAI为1、3和6的下行数据解调成功，而DAI为4的下行数据解调失败，并且，终端设备可以检测得到DAI为2和5的下行数据丢包，则请参考表1，终端设备确定的在目标TTI中的第一HARQ-ACK反馈信息为：ACK、NACK、ACK、NACK、NACK和ACK。其中，此处所说的丢包可以为基站发送下行数据而终端设备未接 收到，或者基站并未发送下行数据，本实施例对此并不做限定。
DAI 1   3 4   6
HARQ-ACK ACK NACK ACK NACK NACK ACK
表1
上述只是以每个下行数据对应于一个HARQ-ACK比特为例，可选地，若每个下行数据采用两个码字发送，且每个码字对应于一个HARQ-ACK比特，则请参考表2，终端设备确定的在目标TTI中的第一HARQ-ACK反馈信息为：ACK、ACK、NACK、NACK、ACK、ACK、NACK、NACK、NACK、NACK、ACK和ACK。
Figure PCTCN2017093789-appb-000001
表2
第二，终端设备根据第二指示信息，确定在目标TTI中的第二HARQ-ACK反馈信息。
当第二指示信息为用于指示目标TTI中的HARQ-ACK反馈信息的总比特数的指示信息时，终端设备确定在目标TTI中的HARQ-ACK反馈信息的个数为第二指示信息中指示的个数。具体的，当终端设备确定的第一HARQ-ACK反馈信息的个数等于第二指示信息指示的个数，则第二HARQ-ACK反馈信息不存在；当终端设备确定的第一HARQ-ACK反馈信息的个数小于第二指示信息指示的比特数，则终端设备确定的第二HARQ-ACK反馈信息为n个NACK反馈信息，n为第二指示信息指示的比特数与第一HARQ-ACK反馈信息的个数的差值。
比如，以终端设备确定的第一HARQ-ACK反馈信息为表1所示的HARQ-ACK反馈信息，第二指示信息指示的比特数为7来举例说明，终端设备确定的第一HARQ-ACK的个数为6，则终端设备确定第二HARQ-ACK反馈信息为一个NACK。此时，请参考表3，终端设备确定得到的在目标TTI中的HARQ-ACK反馈信息为ACK、NACK、ACK、NACK、NACK、ACK和NACK。
DAI 1   3 4   6  
HARQ-ACK ACK NACK ACK NACK NACK ACK NACK
表3
当第二指示信息为预设的反馈时延，则本步骤可以包括：
(1)、根据在目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及预设的反馈时延，检测在接收到最后一个下行数据之后目标TTI之前是否存在未接收到的下行数据。
基站可以向终端设备不断发送下行数据，相应的，终端设备也可以接收到基站不断发送的下行数据。在到达目标TTI时，终端设备根据在目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及预设的反馈时延，检测是否存在未接收到的下行数据。具体的：
当第一指示信息为下行数据的反馈时延时，本步骤包括：检测在目标TTI之前接收到的最后一个下行数据的反馈时延是否大于预设的反馈时延，若检测结果为大于，则说明在 接收到最后一个下行数据之后基站还可能发送其他下行数据，此时终端设备可以确定存在未接收到的下行数据；而若检测结果为不大于，则确定不存在未接收到的下行数据。
比如，所述最后一个下行数据的反馈时延为4TTI，预设的反馈时延为2TTI，则终端设备确定得到在最后一个下行数据之后目标TTI之前，存在两个未被接收到的下行数据。
而当第一指示信息为目标TTI的编号，则本步骤包括：计算接收到最后一个下行数据的TTI与目标TTI之间的第一差值，检测计算得到的第一差值是否大于预设的反馈时延，若大于，则说明在最后一个下行数据之后基站还可能发送其他下行数据，此时终端设备可以确定存在未接收到的下行数据；而若检测结果为不大于，则确定不存在未接收到的下行数据。
比如，在目标TTI之前接收到的最后一个下行数据的TTI与目标TTI之间的差值为5TTI，预设的反馈时延为2TTI，则终端设备确定得到在接收到最后一个下行数据之后目标TTI之前，存在三个未被接收到的下行数据。
(2)、若检测结果为存在未接收到的下行数据，则终端设备根据检测到的未接收到的下行数据的个数，确定在目标TTI中需要反馈的第二HARQ-ACK反馈信息。
当第一指示信息为下行数据的反馈时延时，本步骤包括：确定未接收到的下行数据的个数为在目标TTI之前接收到的最后一个下行数据的反馈时延与预设的反馈时延的差值，确定数量为计算得到的差值的NACK反馈信息。
而当第一指示信息为目标TTI的编号，则本步骤包括：确定未接收到的下行数据的个数为第一差值与预设的反馈时延之间的的第二差值，确定数量为第二差值的NACK反馈信息。
其中，本步骤中确定得到的NACK反馈信息即为第二HARQ-ACK反馈信息。并且，终端设备确定得到的在目标TTI中的HARQ-ACK反馈信息包括第一HARQ-ACK反馈信息和第二HARQ-ACK反馈信息。
比如，以终端设备确定的第一HARQ-ACK反馈信息为表1所示，最后一个下行数据所对应的时延为4TTI，预设的反馈时延为2TTI为例，则请参考图3A，终端设备确定的在目标TTI中的HARQ-ACK反馈信息为：ACK、NACK、ACK、NACK、NACK、ACK、NACK和NACK。
(3)、若检测结果为不存在未接收到的下行数据，则流程结束。
此时，终端设备确定得到的在目标TTI中的HARQ-ACK反馈信息为第一HARQ-ACK反馈信息。
比如，以终端设备确定的第一HARQ-ACK反馈信息为表1所示，最后一个下行数据所对应的时延为2TTI，预设的反馈时延为2TTI为例，则请参考图3B，终端设备确定的在目标TTI中的HARQ-ACK反馈信息为：ACK、NACK、ACK、NACK、NACK和ACK。
需要说明的是，基站可能对某些可用于下行数据传输的TTI并未做调度，对于此种情况，终端设备并不会反馈对应于所述未被调度的可用于下行数据传输的TTI所对应的HARQ-ACK反馈信息。比如，请参考图3C，终端设备确定得到的HARQ-ACK反馈信息为：ACK、NACK、ACK、NACK、NACK、ACK、NACK和NACK。
第二种，当基站SPS时，步骤201可以包括：基站发送DCI至终端设备，DCI中包括 用于表示SPS的字段以及第一指示信息，所述DCI用于激活SPS传输；之后，基站按照预设时间间隔发送下行数据至终端设备。其中，基站在所述DCI之后发送的各个SPS传输的下行数据对应于所述DCI，第一指示信息为半静态调度过程中各个下行数据所对应的指示信息。
此时，步骤204可以包括：
第一，终端设备根据各个下行数据以及第一指示信息确定在目标TTI中的第一HARQ-ACK反馈信息。
对于每个下行数据，终端设备解调接收到的该下行数据，若解调成功，则确定该下行数据所对应的HARQ-ACK反馈信息为ACK；而若解调失败，则确定该下行数据所对应的HARQ-ACK反馈信息为NACK。
此外，由于基站每隔预定时间间隔发送下行数据，因此，若终端设备在每隔预定时间间隔处未接收到下行数据，则终端设备可以确定此处的下行数据丢失，该下行数据所对应的HARQ-ACK反馈信息为NACK。
比如，预定时间间隔为10TTI，则在基站发送DCI至终端设备之后，基站可以发送下行数据至终端设备，并且之后每间隔10TTI发送一个下行数据至终端设备。若终端设备接收到基站发送的第一个下行数据之后，在间隔10TTI处终端设备未接收到下行数据，且在间隔20TTI处接收到下行数据，则终端设备可以确定在间隔10TTI处的下行数据丢失，此时，终端设备可以确定间隔10TTI处的HARQ-ACK反馈信息为NACK。
第二，终端设备根据第二指示信息，确定在目标TTI中的第二HARQ-ACK反馈信息。
本步骤与动态调度时的实现方式类似，本实施例在此不再赘述。
第三种，当基站同时采用动态调度以及SPS时，其实现可以结合上述所说的两种实现方式，本实施例在此不再赘述。
比如，请参考图3D，其示出了动态调度和SPS指向同一目标TTI，预设的反馈时延为2TTI，终端设备对半静态调度的下行数据解调成功，且对动态调度的下行数据的解调情况如表1所示时，终端设备确定的HARQ-ACK反馈信息。
需要补充说明的一点是，终端设备确定在目标TTI中的HARQ-ACK反馈信息之后，终端设备可以对确定的各个HARQ-ACK反馈信息进行排序，并在反馈确定的各个HARQ-ACK反馈信息至基站时，反馈按照预设顺序排序后的HARQ-ACK反馈信息至基站。
具体的，当基站采用动态调度时，终端设备可以按照下行数据的编号由小到大的顺序对各个HARQ-ACK反馈信息排序，并且将在最后一个下行数据和目标TTI之间丢失的下行数据所对应的HARQ-ACK反馈信息排列在最后。其中，上述只是以按照下行数据的编号由小到大的顺序排列为例，可选地，终端设备还可以按照下行数据的编号由大到小的顺序排列，本实施例对此并不做限定。当基站采用半静态调度时，终端设备按照接收到所对应的下行数据的时间顺序进行排序。而当基站采用动态调度和半静态调度时，终端设备可以结合上述两种排序进行排序，或者是将SPS调度的HARQ-ACK反馈信息排列在最前或者最后，本实施例对此并不做限定。
需要补充说明的另一点是，实际实现时，在最后一个下行数据和目标TTI之间，可能会存在非用于下行数据传输的TTI，因此，终端设备在按照上述方法确定第二HARQ-ACK 反馈信息之后，终端设备需要去掉确定的第二HARQ-ACK中非用于下行数据传输的TTI所对应的HARQ-ACK反馈信息。比如，若该方法用于固定子帧配比的系统中时，终端设备可以根据子帧配比获知最后一个下行数据和目标TTI之间是否存在非用于下行数据传输的TTI。
需要补充说明的再一点是，在上述各个实施例中，第二指示信息可以为：基站与终端设备预先约定的信息，或者，基站发送至终端设备的信息，再或者是，终端设备向基站发送的信息。
若第二指示信息为基站配置至终端设备的，作为一种可能的实现方式，基站发送的至少一个下行数据对应的DCI中包括该第二指示信息；作为另一种可能的实现方式，请参考图3E，在步骤204之前，该方法还包括如下步骤：
步骤208，基站通过系统消息或者RRC信令发送第二指示信息至终端设备。
步骤209，终端设备从系统消息或者RRC信令中接收第二指示信息。
可选地，在终端设备接收到第二指示信息之后，终端设备可以发送确认信息至基站，本实施例对此并不做限定。
而若该第二指示信息为终端设备向基站发送的，则请参考图3F，在步骤204之前，该方法还可以包括如下步骤：
步骤210，终端设备向基站发送第二指示信息。
可选地，终端设备可以主动上报该第二指示信息至基站，或者终端设备在接收到基站发送的上报请求之后，上报该第二指示信息至基站。可选地，终端设备可以通过PUCCH或者PUSCH上报预设的反馈时延至基站。
步骤211，基站接收该第二指示信息。
可选地，基站接收到该第二指示信息之后，基站可以返回确认信息至终端设备。
需要说明的是，上述关于基站侧的步骤可以单独实现成为基站侧的HARQ-ACK反馈方法，关于终端设备侧的步骤可以单独实现成为终端设备侧的HARQ-ACK反馈方法。另外，本申请实施例中，各步骤的编号大小并不意味着执行顺序的先后，各步骤的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
请参考图4，其示出了本申请一个实施例提供的HARQ-ACK反馈装置的结构示意图，该HARQ-ACK反馈装置可以用于网络设备中。如图4所示，该HARQ-ACK反馈装置可以包括：发送单元410、接收单元420和解码单元430。
发送单元410，用于向终端设备发送至少一个下行数据以及所述至少一个下行数据对应的下行控制信息DCI，所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
接收单元420，用于在所述目标TTI中从所述终端设备接收所述HARQ-ACK反馈信息；
解码单元430，用于根据第二指示信息解码所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数。
综上所述，本实施例提供的HARQ-ACK反馈装置，通过发送至少一个下行数据以及至少一个下行数据对应的DCI至终端设备，使得终端设备在接收到网络设备发送的DCI和下 行数据之后，根据该DCI中的第一指示信息确定目标TTI，进而之后生成在目标TTI中需要反馈的HARQ-ACK反馈信息，然后在目标TTI中反馈生成的HARQ-ACK反馈信息至网络设备；解决了现有技术中终端设备无法正确反馈HARQ-ACK的问题，达到了即使在接收到所述目标TTI之前最后一个下行数据之后存在丢包，终端设备也能正确的反馈其对应的HARQ-ACK的效果。
可选地，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
可选地，所述网络设备和所述终端设备预存所述第二指示信息；或
所述网络设备通过所述DCI向所述终端设备发送所述第二指示信息；或
所述网络设备通过系统消息或者无线资源控制RRC信令向所述终端设备发送所述第二指示信息；或
所述网络设备从所述终端设备接收所述第二指示信息。
可选地，所述第一指示信息，包括：
所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
所述目标TTI的编号。
可选地，所述DCI，还包括：
所述至少一个下行数据的编号。
请参考图5，其示出了本申请一个实施例提供的HARQ-ACK反馈装置的结构示意图，该HARQ-ACK反馈装置可以用于终端设备中。如图5所示，该HARQ-ACK反馈装置可以包括：接收单元510、生成单元520和发送单元530。
接收单元510，用于接收网络设备发送的至少一个下行数据和所述至少一个下行数据对应的下行控制信息DCI；所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
生成单元520，用于根据第二指示信息生成所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数；
发送单元530，用于在所述目标TTI中向网络设备发送所述HARQ-ACK反馈信息。
综上所述，本实施例提供的HARQ-ACK反馈装置，通过在接收到网络设备发送的至少一个下行数据和至少一个下行数据对应的DCI之后，根据该DCI中的第一指示信息确定目标TTI，进而之后生成在目标TTI中需要反馈的HARQ-ACK反馈信息，然后在目标TTI中反馈生成的HARQ-ACK反馈信息至网络设备；解决了现有技术中终端设备无法正确反馈HARQ-ACK反馈信息的问题，达到了即使在接收到目标TTI之前最后一个下行数据之后存在丢包，终端设备也能正确的反馈其对应的HARQ-ACK反馈信息的效果。
可选地，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
可选地，所述网络设备和所述终端设备预存所述第二指示信息；或，
所述终端设备从所述DCI中接收所述第二指示信息；或
所述终端设备从系统消息或者无线资源控制RRC信令中接收所述第二指示信息；或
所述终端设备向所述网络设备发送所述第二指示信息。
可选地，所述生成单元520，还用于：
根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息；
根据在所述目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及所述预设的反馈时延，检测在接收到所述最后一个下行数据之后所述目标TTI之前是否存在未接收到的下行数据；
若检测结果为存在未接收到的下行数据，则根据检测到的未接收到的下行数据的个数，确定在所述目标TTI中需要反馈的第二HARQ-ACK反馈信息。
可选地，所述DCI中还包括所述至少一个下行数据的编号；所述生成单元520，还用于：
对于每个下行数据，根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
根据接收到的所述各个下行数据的编号检测是否存在丢包；
若检测结果为存在丢包，则确定丢失的下行数据所对应的HARQ-ACK为NACK反馈信息。
可选地，所述生成单元520，还用于：
对于每个下行数据，根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK；
在接收到所述DCI之后，检测在所述目标TTI之前每隔预定时间间隔处是否存在丢包；
若检测结果为存在丢包，则确定丢失的下行数据所对应的HARQ-ACK为NACK反馈信息。
可选地，所述生成单元520，还用于：
在所述目标TTI中反馈向所述网络设备发送按照预设顺序排序的所述HARQ-ACK反馈信息，所述预设顺序为与所述网络设备预先约定的顺序。
可选地，所述第一指示信息，包括：
所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
所述目标TTI的编号。
上述主要从基站和终端设备交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，基站、终端设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本申请中所公开的实施例描述的各示例的单元及算法步骤，本申请实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本申请实施例的技术方案的范围。
图6示出了本申请实施例所涉及的网络设备的一种可能的结构示意图。
基站600包括发射器/接收器601和处理器602。其中，处理器602也可以为控制器，图6中表示为“控制器/处理器602”。所述发射器/接收器601用于支持基站与上述实施例中的所述终端设备之间收发信息，以及支持所述终端设备与其他终端设备之间进行无线电通信。所述处理器602执行各种用于与终端设备通信的功能。在上行链路，来自所述终端设备的上行链路信号经由天线接收，由接收器601进行解调(例如将高频信号解调为基带信号)，并进一步由处理器602进行处理来恢复终端设备所发送到业务数据和信令信息。在下行链路上，业务数据和信令消息由处理器602进行处理，并由发射器601进行调制(例如将基带信号调制为高频信号)来产生下行链路信号，并经由天线发射给终端设备。需要说明的是，上述解调或调制的功能也可以由处理器602完成。例如，处理器602还用于执行图2中的过程201和206，和/或本申请所描述的技术方案的其他过程。
进一步的，基站600还可以包括存储器603，存储器603用于存储基站600的程序代码和数据。此外，基站还可以包括通信单元604。通信单元604用于支持基站与其他网络实体(例如核心网中的网络设备等)进行通信。例如，在LTE系统中，该通信单元604可以是S1-U接口，用于支持基站与服务网关(英文：Serving Gateway，简称：SGW)进行通信；或者，该通信单元604也可以是S1-MME接口，用于支持基站与移动性管理实体(英文：Mobility Management Entity，简称：MME)进行通信。
可以理解的是，图6仅仅示出了基站600的简化设计。在实际应用中，基站600可以包含任意数量的发射器，接收器，处理器，控制器，存储器，通信单元等，而所有可以实现本申请实施例的基站都在本申请实施例的保护范围之内。
图7示出了本申请实施例中所涉及的终端设备的一种可能的设计结构的简化示意图。所述终端设备700包括发射器701，接收器702和处理器703。其中，处理器703也可以为控制器，图7中表示为“控制器/处理器703”。可选的，所述终端设备700还可以包括调制解调处理器705，其中，调制解调处理器705可以包括编码器706、调制器707、解码器708和解调器709。
在一个示例中，发射器701调节(例如，模拟转换、滤波、放大和上变频等)该输出采样并生成上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的基站。在下行链路上，天线接收上述实施例中基站发射的下行链路信号。接收器702调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。在调制解调处理器705中，编码器706接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码和交织)。调制器707进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器709处理(例如，解调)该输入采样并提供符号估计。解码器708处理(例如，解交织和解码)该符号估计并提供发送给终端设备700的已解码的数据和信令消息。编码器706、调制器707、解调器709和解码器708可以由合成的调制解调处理器705来实现。这些单元根据无线接入网采用的无线接入技术(例如，LTE及其他演进系统的接入技术)来进行处理。需要说明的是，当终端设备700不包括调制解调处理器705时，调制解调处理器705的上述功能也可以由处理器703完成。
处理器703对终端设备700的动作进行控制管理，用于执行上述本申请实施例中由终端设备700进行的处理过程。例如，处理器703还用于执行图2的过程202、203、204和 205，和/或本申请所描述的技术方案的其他过程。
进一步的，终端设备700还可以包括存储器704，存储器704用于存储用于终端设备700的程序代码和数据。
用于执行本申请实施例上述基站或终端设备的功能的处理器可以是中央处理器(英文：Central Processing Unit，简称：CPU)，通用处理器、数字信号处理器(英文：Digital Signal Processor，简称：DSP)、专用集成电路英文：(Application-Specific Integrated Circuit，简称：ASIC)，现场可编程门阵列(英文：Field Programmable Gate Array，简称：FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。其可以实现或执行结合本申请实施例公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
结合本申请实施例公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(英文：Random Access Memory，简称：RAM)、闪存、只读存储器(英文：Read Only Memory，简称：ROM)、可擦除可编程只读存储器(英文：Erasable Programmable ROM，简称：EPROM)、电可擦可编程只读存储器(英文：Electrically EPROM，简称：EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(英文：CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于基站或终端设备中。当然，处理器和存储介质也可以作为分立组件存在于基站或终端设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
本申请实施例还提供了一种HARQ-ACK反馈装置，该装置包括处理器和存储器，该存储器中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由该处理器加载并执行以实现上述实施例中网络设备侧的HARQ-ACK反馈方法。
本申请实施例还提供了一种计算机可读存储介质，该存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由处理器加载并执行以实现上述实施例中网络设备侧的HARQ-ACK反馈方法。
本申请实施例还提供了一种HARQ-ACK反馈装置，该装置包括处理器和存储器，该存储器中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由该处理器加载并执行以实现上述实施例中终端设备侧的HARQ-ACK反馈方法。
本申请实施例还提供了一种计算机可读存储介质，该存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，该至少一条指令、该至少一段程序、该代码集或该指令集由处理器加载并执行以实现上述实施例中终端设备侧的HARQ-ACK反馈方法。
以上所述的具体实施方式，对本申请实施例的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请实施例的具体实施方式而已，并不用于限定本申请实施例的保护范围，凡在本申请实施例的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请实施例的保护范围之内。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。

Claims (39)

  1. 一种混合自动重传请求确认HARQ-ACK反馈方法，其特征在于，所述方法包括：
    网络设备向终端设备发送至少一个下行数据以及所述至少一个下行数据对应的下行控制信息DCI，所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    所述网络设备在所述目标TTI中从所述终端设备接收所述HARQ-ACK反馈信息；
    所述网络设备根据第二指示信息解码所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数。
  2. 根据权利要求1所述的方法，其特征在于，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或
    所述网络设备通过所述DCI向所述终端设备发送所述第二指示信息；或
    所述网络设备通过系统消息或者无线资源控制RRC信令向所述终端设备发送所述第二指示信息；或
    所述网络设备从所述终端设备接收所述第二指示信息。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
  5. 根据权利要求1至4任一所述的方法，其特征在于，所述DCI，还包括：
    所述至少一个下行数据的编号。
  6. 一种混合自动重传请求确认HARQ-ACK反馈方法，其特征在于，所述方法包括：
    终端设备接收网络设备发送的至少一个下行数据和所述至少一个下行数据对应的下行控制信息DCI；所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    所述终端设备根据第二指示信息生成所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数；
    所述终端设备在所述目标TTI中向所述网络设备发送所述HARQ-ACK反馈信息。
  7. 根据权利要求6所述的方法，其特征在于，所述第二指示信息包括预设的反馈时延， 所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  8. 根据权利要求6或7所述的方法，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或，
    所述终端设备从所述DCI中接收所述第二指示信息；或
    所述终端设备从系统消息或者无线资源控制RRC信令中接收所述第二指示信息；或
    所述终端设备向所述网络设备发送所述第二指示信息。
  9. 根据权利要求7或8所述的方法，其特征在于，所述终端设备根据第二指示信息生成所述HARQ-ACK反馈信息，包括：
    所述终端设备根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息；
    所述终端设备根据在所述目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及所述预设的反馈时延，检测在接收到所述最后一个下行数据之后所述目标TTI之前是否存在未接收到的下行数据；
    若检测结果为存在未接收到的下行数据，则所述终端设备根据检测到的未接收到的下行数据的个数，确定在所述目标TTI中需要反馈的第二HARQ-ACK反馈信息。
  10. 根据权利要求9所述的方法，其特征在于，所述DCI中还包括所述至少一个下行数据的编号；
    所述根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息，包括：
    对于每个下行数据，所述终端设备根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
    所述终端设备根据接收到的所述各个下行数据的编号检测是否存在丢包；
    若检测结果为存在丢包，则所述终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  11. 根据权利要求9所述的方法，其特征在于，所述根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息，包括：
    对于每个下行数据，所述终端设备根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
    在所述终端设备接收到所述DCI之后，检测在所述目标TTI之前每隔预定时间间隔处是否存在丢包；
    若检测结果为存在丢包，则所述终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  12. 根据权利要求6至11任一所述的方法，其特征在于，所述终端设备在所述目标TTI 中向所述网络设备发送所述HARQ-ACK反馈信息，包括：
    在所述目标TTI中向所述网络设备发送按照预设顺序排序的所述HARQ-ACK反馈信息，所述预设顺序为与所述网络设备预先约定的顺序。
  13. 根据权利要求6至11任一所述的方法，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
  14. 一种网络设备，其特征在于，所述网络设备包括：通信组件和处理器；
    所述通信组件，用于向终端设备发送至少一个下行数据以及所述至少一个下行数据对应的下行控制信息DCI，所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    所述处理器，用于在所述目标TTI中从所述终端设备接收所述HARQ-ACK反馈信息；
    所述处理器，还用于根据第二指示信息解码所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数。
  15. 根据权利要求14所述的网络设备，其特征在于，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  16. 根据权利要求14或15所述的网络设备，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或
    所述网络设备通过所述DCI向所述终端设备发送所述第二指示信息；或
    所述网络设备通过系统消息或者无线资源控制RRC信令向所述终端设备发送所述第二指示信息；或
    所述网络设备从所述终端设备接收所述第二指示信息。
  17. 根据权利要求14至16任一所述的网络设备，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
  18. 根据权利要求14至17任一所述的网络设备，其特征在于，所述DCI，还包括：
    所述至少一个下行数据的编号。
  19. 一种终端设备，其特征在于，所述终端设备包括：通信组件和处理器；
    所述通信组件，用于接收网络设备发送的至少一个下行数据和所述至少一个下行数据对 应的下行控制信息DCI；所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    所述处理器，用于根据第二指示信息生成所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数；
    所述通信组件，还用于在所述目标TTI中向所述网络设备发送所述HARQ-ACK反馈信息。
  20. 根据权利要求19所述的终端设备，其特征在于，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  21. 根据权利要求19或20所述的终端设备，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或，
    所述终端设备从所述DCI中接收所述第二指示信息；或
    所述终端设备从系统消息或者无线资源控制RRC信令中接收所述第二指示信息；或
    所述终端设备向所述网络设备发送所述第二指示信息。
  22. 根据权利要求20或21所述的终端设备，其特征在于，所述处理器，还用于：
    根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息；
    根据在所述目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及所述预设的反馈时延，检测在接收到所述最后一个下行数据之后所述目标TTI之前是否存在未接收到的下行数据；
    若检测结果为存在未接收到的下行数据，则所述终端设备根据检测到的未接收到的下行数据的个数，确定在所述目标TTI中需要反馈的第二HARQ-ACK反馈信息。
  23. 根据权利要求22所述的终端设备，其特征在于，所述DCI中还包括所述至少一个下行数据的编号；
    所述处理器，还用于：
    对于每个下行数据，所述终端设备根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
    所述终端设备根据接收到的所述各个下行数据的编号检测是否存在丢包；
    若检测结果为存在丢包，则所述终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  24. 根据权利要求22所述的终端设备，其特征在于，所述处理器，还用于：
    对于每个下行数据，所述终端设备根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
    在所述终端设备接收到所述DCI之后，检测在所述目标TTI之前每隔预定时间间隔处是 否存在丢包；
    若检测结果为存在丢包，则所述终端设备确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  25. 根据权利要求19至24任一所述的终端设备，其特征在于，所述通信组件，还用于：
    在所述目标TTI中向所述网络设备发送按照预设顺序排序的所述HARQ-ACK反馈信息，所述预设顺序为与所述网络设备预先约定的顺序。
  26. 根据权利要求19至24任一所述的终端设备，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
  27. 一种混合自动重传请求确认HARQ-ACK反馈装置，其特征在于，用于网络设备中，所述装置包括：
    发送单元，用于向终端设备发送至少一个下行数据以及所述至少一个下行数据对应的下行控制信息DCI，所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    接收单元，用于在所述目标TTI中从所述终端设备接收所述HARQ-ACK反馈信息；
    解码单元，用于根据第二指示信息解码所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数。
  28. 根据权利要求27所述的装置，其特征在于，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  29. 根据权利要求27或28所述的装置，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或
    所述网络设备通过所述DCI向所述终端设备发送所述第二指示信息；或
    所述网络设备通过系统消息或者无线资源控制RRC信令向所述终端设备发送所述第二指示信息；或
    所述网络设备从所述终端设备接收所述第二指示信息。
  30. 根据权利要求27至29任一所述的装置，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
  31. 根据权利要求27至29任一所述的装置，其特征在于，所述DCI，还包括：
    所述至少一个下行数据的编号。
  32. 一种混合自动重传请求确认HARQ-ACK反馈装置，其特征在于，用于终端设备中，所述装置包括：
    接收单元，用于接收网络设备发送的至少一个下行数据和所述至少一个下行数据对应的下行控制信息DCI；所述DCI包括第一指示信息，所述第一指示信息用于指示传输所述至少一个下行数据对应的HARQ-ACK反馈信息的目标传输时间间隔TTI，所述HARQ-ACK反馈信息用于指示所述至少一个下行数据的接收状态；
    生成单元，用于根据第二指示信息生成所述HARQ-ACK反馈信息，所述第二指示信息用于指示所述HARQ-ACK反馈信息的比特数；
    发送单元，用于在所述目标TTI中向网络设备发送所述HARQ-ACK反馈信息。
  33. 根据权利要求32所述的装置，其特征在于，所述第二指示信息包括预设的反馈时延，所述第二指示信息通过所述预设的反馈时延指示所述HARQ-ACK反馈信息的比特数。
  34. 根据权利要求32或33所述的装置，其特征在于，
    所述网络设备和所述终端设备预存所述第二指示信息；或，
    所述终端设备从所述DCI中接收所述第二指示信息；或
    所述终端设备从系统消息或者无线资源控制RRC信令中接收所述第二指示信息；或
    所述终端设备向所述网络设备发送所述第二指示信息。
  35. 根据权利要求33或34所述的装置，其特征在于，所述生成单元，还用于：
    根据在所述目标TTI之前接收到的各个下行数据以及每个下行数据所对应的第一指示信息，确定在所述目标TTI中需要反馈的第一HARQ-ACK反馈信息；
    根据在所述目标TTI之前接收到的最后一个下行数据所对应的第一指示信息以及所述预设的反馈时延，检测在接收到所述最后一个下行数据之后所述目标TTI之前是否存在未接收到的下行数据；
    若检测结果为存在未接收到的下行数据，则根据检测到的未接收到的下行数据的个数，确定在所述目标TTI中需要反馈的第二HARQ-ACK反馈信息。
  36. 根据权利要求35所述的装置，其特征在于，所述DCI中还包括所述至少一个下行数据的编号；
    所述生成单元，还用于：
    对于每个下行数据，根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK反馈信息；
    根据接收到的所述各个下行数据的编号检测是否存在丢包；
    若检测结果为存在丢包，则确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  37. 根据权利要求35所述的装置，其特征在于，所述生成单元，还用于：
    对于每个下行数据，根据对所述下行数据的解调结果确定所述下行数据所对应的HARQ-ACK；
    在接收到所述DCI之后，检测在所述目标TTI之前每隔预定时间间隔处是否存在丢包；
    若检测结果为存在丢包，则确定丢失的下行数据所对应的HARQ-ACK反馈信息为NACK。
  38. 根据权利要求32至37任一所述的装置，其特征在于，所述生成单元，还用于：
    在所述目标TTI中向所述网络设备发送按照预设顺序排序的所述HARQ-ACK反馈信息，所述预设顺序为与所述网络设备预先约定的顺序。
  39. 根据权利要求32至38任一所述的装置，其特征在于，所述第一指示信息，包括：
    所述至少一个下行数据的反馈时延，其中，所述反馈时延是所述目标TTI与传输所述下行数据的TTI的时间差；或
    所述目标TTI的编号。
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EP3493437B1 (en) 2021-10-20
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