WO2018192383A1 - Procédé de réception et procédé de transmission d'informations de rétroaction, appareil et système - Google Patents

Procédé de réception et procédé de transmission d'informations de rétroaction, appareil et système Download PDF

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Publication number
WO2018192383A1
WO2018192383A1 PCT/CN2018/082383 CN2018082383W WO2018192383A1 WO 2018192383 A1 WO2018192383 A1 WO 2018192383A1 CN 2018082383 W CN2018082383 W CN 2018082383W WO 2018192383 A1 WO2018192383 A1 WO 2018192383A1
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WIPO (PCT)
Prior art keywords
time
feedback information
harq process
terminal
uplink data
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PCT/CN2018/082383
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English (en)
Chinese (zh)
Inventor
郑娟
官磊
李�远
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华为技术有限公司
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Priority claimed from CN201710807400.7A external-priority patent/CN108737036B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2018192383A1 publication Critical patent/WO2018192383A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the present application relates to the field of communications, and in particular, to a feedback information receiving method, a transmitting method, an apparatus, and a system.
  • the feedback information refers to the information that the access network device feeds back to the terminal after receiving the uplink data sent by the terminal.
  • the feedback information is used to indicate whether the access network device correctly receives the uplink data sent by the terminal.
  • the feedback information usually includes an Acknowledgement (ACK) and a Non-Acknowledgement (NACK).
  • ACK is used to indicate that the access network has correctly received the uplink data sent by the terminal
  • NACK is used to indicate that the access network device does not correctly receive the uplink data sent by the terminal.
  • the feedback information also includes discontinuous transmission (DTX). When the terminal sends uplink data, but the access network device does not receive the uplink data, DTX can be used for feedback.
  • DTX discontinuous transmission
  • the process of transmitting uplink data from a terminal to receiving feedback information by the terminal includes the following steps: the terminal sends a scheduling request (SR) to the access network device; The network device sends a first uplink scheduling grant (UL grant) to the terminal according to the SR; the terminal receives the first UL grant, and transmits uplink data to the access network device according to the control information in the first UL grant; the access network device After receiving the uplink data sent by the terminal, the GPRS is fed back to the terminal by the Physical Hybrid-ARQ Indicator Channel (PHICH), and the terminal initially confirms that the access network device has correctly received the uplink data (the ACK can be occupied.
  • SR scheduling request
  • UL grant uplink scheduling grant
  • UL grant uplink scheduling grant
  • the terminal receives the first UL grant, and transmits uplink data to the access network device according to the control information in the first UL grant
  • the access network device After receiving the uplink data sent by the terminal, the GPRS is fed back to the terminal by
  • the access network device when the terminal still has data to be transmitted, the access network device continues to send a second UL grant to the terminal, and when the second UL grant is used to indicate that new data is transmitted, the terminal receives the data according to The ACK and the second UL grant determine again that the access network device has correctly received the uplink data, and according to the second UL gr Ant continues to send other uplink data to the access network device.
  • the entire transmission process of the uplink data is long. If the statistics are based on the Transmission Time Interval (TTI), a transmission delay of 12*TTI+0.5*(N*TTI) is usually required. N*TTI is the transmission period of the SR.
  • TTI Transmission Time Interval
  • N*TTI is the transmission period of the SR.
  • URLLC Ultra-Reliability Low Latency Communication
  • the UL grant free transmission refers to the uplink transmission resource that the terminal does not need to wait for the access network device to allocate through the UL grant.
  • the terminal can select the uplink transmission resource in the preset resource to send the uplink data, which greatly reduces the transmission of the uplink data. Delay.
  • the access network device does not need to send the UL grant to the terminal in most cases, for example, for the initial transmission data. Therefore, the current HARQ feedback mechanism in the LTE system is not suitable as a feedback mechanism for the UL grant free transmission. .
  • the embodiment of the present application provides a feedback information receiving method, a sending method, a device, and a system.
  • the terminal device misses the feedback corresponding to the second HARQ process even before receiving the feedback information including the first feedback information and the second feedback information.
  • the information may also be used to determine the feedback information corresponding to the second HARQ process by using the feedback information including the first feedback information and the second feedback information, thereby increasing the robustness of the second HARQ process feedback information, and is particularly suitable for transmission reliability.
  • transport services such as URLLC.
  • the terminal before receiving the feedback information on the first time unit, the terminal further includes: the terminal sending, by using the first HARQ process, the first uplink data on the third time unit; Before a time unit.
  • the terminal selects the uplink transmission resource to transmit the first uplink data by using the first HARQ process. At this time, the access network device receives the first uplink data. After the feedback information is sent, the terminal can learn the first uplink data or retransmit the scheduling information of the first uplink data. The access network device does not need to send the scheduling information, such as a UL grant, to meet the UL grant free transmission. Scenes.
  • the terminal sends the uplink data by using the first HARQ process on the second time unit according to the first feedback information, including: the terminal according to the first feedback Transmitting, by the first HARQ process, the first uplink data on the second time unit; or, the terminal first transmitting the second uplink data by using the first HARQ process on the second time unit according to the first feedback information;
  • the uplink data sent by the first HARQ process includes first uplink data and/or second uplink data.
  • the first feedback information can be used for the terminal to retransmit the first uplink data and the second uplink data for the terminal, so that the access network device does not need to send the UL grant before the terminal sends the first uplink data, and the UL grant is satisfied. Free transmission scenario.
  • the receiving state includes an acknowledgement receiving state ACK and a non-acknowledging receiving state NACK; the second feedback information is further used to indicate the first The receiving state corresponding to the HARQ process; when the receiving state corresponding to the first HARQ process is the acknowledgment receiving state, the first feedback information is used by the scheduling terminal to initially transmit the second uplink data in the second time unit by using the first HARQ process; When the receiving state corresponding to the HARQ process is the non-acknowledgment receiving state, the first feedback information is used by the scheduling terminal to retransmit the first uplink data on the second time unit by using the first HARQ process.
  • the second feedback information is used to carry the receiving state corresponding to the first HARQ process, so that the terminal can determine, according to the receiving state in the second feedback information, that the first feedback information is used to schedule retransmission of the first uplink by using the first HARQ process.
  • the data is used to schedule the first uplink data to be transmitted through the first HARQ process; and the second feedback information does not need to carry the retransmission or the initial transmission indication, and the information length of the second feedback information is reduced.
  • the first feedback information is further used to schedule the terminal to pass the n
  • the m second HARQ processes in the two HARQ processes send uplink data, 1 ⁇ m ⁇ n, and m is an integer.
  • the uplink data is sent by scheduling the m second HARQ processes in the n second HARQ processes, so that the access network device can dynamically configure the uplink corresponding to the m second HARQ processes according to factors such as the current load, the channel status, and the network status.
  • the transmission resource improves the success rate of the terminal transmitting other uplink data through the second HARQ process.
  • the first feedback information is used to schedule the m second HARQ processes to send the uplink data, and the control signaling overhead for scheduling the uplink data may also be reduced.
  • the first feedback information is used by the scheduling terminal to retransmit the corresponding other uplink data by using the s second HARQ processes; and/or, the first The feedback information is used to schedule other uplink data corresponding to the initial transmission of the terminal by the ms second HARQ processes; where s is an integer not less than zero, and s ⁇ m.
  • the method further includes: receiving, by the terminal, configuration information, where the configuration information is used to indicate that the terminal receives the first feedback information and the second channel on the downlink channel. Feedback.
  • the access network device can simultaneously send the first feedback information and the second feedback information by using the manner that the access network device dynamically configures the terminal to receive the first feedback information and the second feedback information, and can separately send the first feedback information separately.
  • the second feedback information improves the flexibility of the access network device to send feedback information.
  • the second feedback information is represented in the form of a bitmap.
  • the bitmap includes the preset number of bits, each bit is used to indicate the receiving state corresponding to the corresponding uplink HARQ process. Therefore, the second feedback information does not need to carry the process number of each uplink HARQ process, so that the terminal can learn the second.
  • the correspondence between the receiving state and the uplink HARQ process in the feedback information reduces the information length of the second feedback information.
  • the access network device and the terminal can have a consistent understanding of the receiving state of the uplink data, and the receiving state of the feedback is not caused by the uplink data sent by the access network device due to the leak detection terminal. The exact impact.
  • the terminal can determine the correspondence between the receiving state and the HARQ process according to the correspondence between the time indication information and the receiving state, and ensure that the terminal determines each HARQ. The accuracy of the receiving status corresponding to the process.
  • the time indication information indicates a time range of a time unit corresponding to a reception state of the n second HARQ processes.
  • the time indication information includes a time start point and a time end point of the time range; or the time indication information includes a time start time and a time length of the time range; or the time indication information includes a time end point and a time length of the time range; or, the time The indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured; or, the time indication information includes a time start or a time end of the time range, and the time length of the time range is pre-configured.
  • the time start point is the earliest time unit in the time domain among the n time units; and/or, the time end point is the latest time unit in the time domain among the n time units; and/or, the time length is The length of time between the earliest time unit in the time domain and the latest time unit in the time domain among the n time units.
  • the time indication information indication is avoided by setting the time start point to the earliest time unit in the time domain among the n time units, and/or setting the time end point to the latest time unit in the time domain among the n time units.
  • the redundant time unit saves the signaling overhead of the access network device.
  • the length of time is associated with the number of bits corresponding to the received states of the n second HARQ processes.
  • the access network device By associating the length of time with the number of bits corresponding to the receiving state of the n second HARQ processes, the access network device does not need additional signaling to indicate the time length of the time range, which saves the signaling overhead of the access network device.
  • the time range includes a sub-time range, where the time start of the sub-time range is a time unit corresponding to the second HARQ process that meets the preset condition in the n second HARQ processes, and the time end point of the sub-time range is the first time unit Or the time unit before the first time unit,
  • the receiving state of the uplink data is received before the terminal automatically retransmits the uplink data, thereby ensuring the validity of the receiving state fed back by the access network device.
  • the retransmission waiting time further includes a feedback delay, where the feedback delay is a time when the terminal sends the uplink data by using the second HARQ process that meets the preset condition, and receives the second HARQ process that meets the preset condition. The length of time between the moments of the state.
  • the preset condition is at least one of the following conditions:
  • the corresponding time unit is a second HARQ process of the earliest time unit in the time domain among the n time units;
  • the second HARQ process with the shortest duration of the corresponding automatic retransmission timer
  • Corresponding automatic retransmission timer has a timing duration greater than a preset length of the second HARQ process
  • the HARQ process that retransmits the upstream data at the earliest in the time domain.
  • n is greater than or equal to two.
  • a method for receiving feedback information includes: the terminal sends uplink data by n hybrid automatic retransmission HARQ processes on n time units, where n is a positive integer; the terminal receives on the first time unit.
  • the feedback information includes a receiving state and time indication information of the n HARQ processes, where the time indication information is used to indicate a time unit corresponding to the receiving state of the n HARQ processes, and the n time units are located before the first time unit.
  • the time indication information indicates a time range corresponding to the n time units.
  • the time indication information includes a time start point and a time end point of the time range; or the time indication information includes a time start time and a time length of the time range; or the time indication information includes a time end point and a time length of the time range; or, the time The indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured; or, the time indication information includes a time start or a time end of the time range, and the time length of the time range is pre-configured.
  • the time start point is the earliest time unit in the time domain among the n time units; and/or, the time end point is the latest time unit in the time domain among the n time units; and/or, the time length is The length of time between the earliest time unit in the time domain and the latest time unit in the time domain among the n time units.
  • the length of time is associated with the number of bits corresponding to the received state of the n HARQ processes.
  • the time range includes a sub-time range, where the time start of the sub-time range is a time unit corresponding to the HARQ process that meets the preset condition in the n HARQ processes, and the time end point of the sub-time range is the first time unit or the first time The time unit before the unit,
  • the length of the sub-time range is less than or equal to the retransmission waiting time.
  • the retransmission waiting time includes the timing of the automatic retransmission timer.
  • the automatic retransmission timer is used to trigger the terminal to retransmit the uplink data sent by the HARQ process that meets the preset condition.
  • the start time of the automatic retransmission timer is after the time unit corresponding to the HARQ process that meets the preset condition.
  • the retransmission waiting time further includes a feedback delay, where the feedback delay is a time when the terminal sends the uplink data by the HARQ process that meets the preset condition, and receives the receiving state of the HARQ process that meets the preset condition.
  • the length of the interval is a time when the terminal sends the uplink data by the HARQ process that meets the preset condition, and receives the receiving state of the HARQ process that meets the preset condition.
  • the preset condition is at least one of the following conditions: the corresponding time unit is a HARQ process of the earliest time unit in the time domain among the n time units; the timing of the corresponding automatic retransmission timer is the shortest The HARQ process; the HARQ process of the corresponding automatic retransmission timer is greater than the preset length of the HARQ process; and the HARQ process of the uplink data is retransmitted at the earliest in the time domain.
  • n is greater than or equal to two.
  • the feedback information includes the first feedback information and the second feedback information, where the first feedback information is used to indicate that the terminal sends the uplink data by using the first HARQ process on the second time unit, where the second feedback information includes the n HARQ processes.
  • Receive status and time indication information Receive status and time indication information.
  • a method for receiving feedback information includes: the terminal sends uplink data by n hybrid automatic retransmission HARQ processes on n time units, where n is a positive integer; the terminal receives on the first time unit.
  • the feedback information includes the receiving state of the n HARQ processes, and the length of time between the time unit corresponding to the HARQ process and the first time unit in the n HARQ processes is less than or equal to the retransmission waiting time, and the retransmission is performed.
  • the waiting duration includes the timing of the automatic retransmission timer, and the automatic retransmission timer is used to trigger the terminal to retransmit the uplink data sent by the HARQ process that meets the preset condition.
  • a fourth aspect provides a method for receiving feedback information, where the method includes: the access network device sends feedback information on the first time unit, where the feedback information includes the first feedback information and the second feedback information through the same downlink channel, where The feedback information is used by the scheduling terminal to send uplink data by using the first HARQ process; the second feedback information is the receiving state of the n second HARQ processes, the second HARQ process is the HARQ process of the terminal, and n is a positive integer; the access network device is The second time unit receives the uplink data sent by the terminal through the first HARQ process; the second time unit is located after the first time unit.
  • the method before the access network device sends the feedback information on the first time unit, the method further includes: the access network device is on the third time unit, and the receiving terminal passes the first The first uplink data sent by the HARQ process; the third time unit is located before the first time unit.
  • the access network device receives the uplink data sent by the terminal by using the first HARQ process, including: the access network device On the second time unit, the receiving terminal retransmits the first uplink data by using the first HARQ process; or the access network device sends the second uplink data by using the first HARQ process on the second time unit;
  • the uplink data sent by the first HARQ process includes first uplink data and/or second uplink data.
  • the receiving state includes the acknowledgement receiving state ACK and the non-acknowledging receiving state NACK; the second feedback information is further used to indicate the first The receiving state corresponding to the HARQ process; when the receiving state corresponding to the first HARQ process is the acknowledgment receiving state, the first feedback information is used by the scheduling terminal to initially transmit the second uplink data in the second time unit by using the first HARQ process; When the receiving state corresponding to the HARQ process is the non-acknowledgment receiving state, the first feedback information is used by the scheduling terminal to retransmit the first uplink data on the second time unit by using the first HARQ process.
  • the first feedback information is further used to schedule the terminal to pass the n second
  • the m second HARQ processes in the HARQ process send the second uplink data, 1 ⁇ m ⁇ n, and m is an integer.
  • the first feedback information is used by the scheduling terminal to retransmit the corresponding other uplink data by using the s second HARQ processes; and/or, the first The feedback information is used to schedule other uplink data corresponding to the initial transmission of the terminal by the ms second HARQ processes; where s is an integer not less than zero, and s ⁇ m.
  • the method further includes: the access network device sends configuration information, The configuration information is used to indicate that the terminal receives the first feedback information and the second feedback information on the downlink channel.
  • the second feedback information is represented in the form of a bitmap.
  • the receiving state of the n second HARQ processes includes: a receiving state when the terminal sends other uplink data by using the second HARQ process, and/or, the terminal does not The default reception status when other uplink data is transmitted through the second HARQ process.
  • the maximum value of the uplink HARQ process supported by the terminal is n+1; or the maximum value of the uplink HARQ process supported by the terminal for assisting the UL grant free transmission. Is n+1.
  • the first feedback information includes time domain resource configuration information and/or frequency domain resource configuration information.
  • the time interval between the third time unit and the first time unit, the time interval between the second time unit and the first time are predefined, Or pre-configured by the access network device, or dynamically notified by the access network device.
  • the frequency band in which the third time unit, the second time unit, and the first time unit are located is an unlicensed frequency band, and the third time unit and the second time unit are once The time unit included in the uplink duration in the transmission opportunity TxOP.
  • the third time unit may belong to the same TxOP or may belong to a different TxOP.
  • the second feedback information further includes time indication information, where the time indication information is used to indicate a time unit corresponding to a receiving state of the n second HARQ processes.
  • the access network device before the sending network device sends the feedback information on the first time unit, the access network device further includes:
  • the access network device receives the uplink data sent by the terminal through the n second HARQ processes on the n time units, and the n time units are located before the first time unit in the time domain.
  • the second feedback information is further used to indicate a receiving state corresponding to the first HARQ process
  • the time indication information is further used to indicate a time unit corresponding to the receiving state of the first HARQ process.
  • the time indication information indicates a time range of a time unit corresponding to a reception state of the n second HARQ processes.
  • the time indication information includes a time start point and a time end point of the time range; or,
  • the time indication information includes the time start and length of time of the time range; or,
  • the time indication information includes the time end of the time range and the length of time; or,
  • the time indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured; or,
  • the time indication information includes a time start or a time end of the time range, and the time length of the time range is pre-configured.
  • the time start is the earliest time unit in the time domain of the n time units.
  • the end of time is the latest time unit in the time domain of n time units; and/or,
  • the length of time is the length of time between the earliest time unit in the time domain and the latest time unit in the time domain in n time units.
  • the length of time is associated with the number of bits corresponding to the received states of the n second HARQ processes.
  • the time range includes a sub-time range, where the time start of the sub-time range is a time unit corresponding to the second HARQ process that meets the preset condition in the n second HARQ processes, and the time end point of the sub-time range is the first time unit Or the time unit before the first time unit,
  • the length of the sub-time range is less than or equal to the retransmission waiting time.
  • the retransmission waiting time includes the timing of the automatic retransmission timer.
  • the automatic retransmission timer is used to trigger the terminal to retransmit the uplink data sent by the HARQ process that meets the preset condition.
  • the start time of the automatic retransmission timer is after the time unit corresponding to the HARQ process that meets the preset condition.
  • the retransmission waiting time further includes a feedback delay, where the feedback delay is a time when the terminal sends the uplink data by using the second HARQ process that meets the preset condition, and receives the second HARQ process that meets the preset condition. The length of time between the moments of the state.
  • the preset condition is at least one of the following conditions:
  • the corresponding time unit is a second HARQ process of the earliest time unit in the time domain among the n time units;
  • the second HARQ process with the shortest duration of the corresponding automatic retransmission timer
  • Corresponding automatic retransmission timer has a timing duration greater than a preset length of the second HARQ process
  • the HARQ process that retransmits the upstream data at the earliest in the time domain.
  • n is greater than or equal to two.
  • a fifth aspect provides a method for sending feedback information, where the method includes: the access network device receives, on n time units, uplink data sent by the terminal through the n hybrid automatic retransmission HARQ processes, where n is a positive integer; The network device sends feedback information on the first time unit, where the feedback information includes a receiving state and time indication information of the n HARQ processes, where the time indication information is used to indicate a time unit corresponding to the receiving state of the n HARQ processes, where the n time units are located. Before the first time unit.
  • the time indication information indicates a time range corresponding to the n time units.
  • the time indication information includes a time start point and a time end point of the time range; or the time indication information includes a time start time and a time length of the time range; or the time indication information includes a time end point and a time length of the time range; or, the time The indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured; or, the time indication information includes a time start or a time end of the time range, and the time length of the time range is pre-configured.
  • the time start point is the earliest time unit in the time domain among the n time units; and/or, the time end point is the latest time unit in the time domain among the n time units; and/or, the time length is The length of time between the earliest time unit in the time domain and the latest time unit in the time domain among the n time units.
  • the length of time is associated with the number of bits corresponding to the received state of the n HARQ processes.
  • the time range includes a sub-time range, where the time start of the sub-time range is a time unit corresponding to the HARQ process that meets the preset condition in the n HARQ processes, and the time end point of the sub-time range is the first time unit or the first time
  • the time unit in front of the unit, the time length of the sub-time range is less than or equal to the retransmission waiting time length, and the retransmission waiting time length includes the timing duration of the automatic retransmission timer, and the automatic retransmission timer is used to trigger the terminal retransmission by satisfying the preset condition.
  • the uplink data sent by the HARQ process, the start time of the automatic retransmission timer is after the time unit corresponding to the HARQ process that meets the preset condition.
  • the retransmission waiting time further includes a feedback delay, where the feedback delay is a time when the terminal sends the uplink data by the HARQ process that meets the preset condition, and receives the receiving state of the HARQ process that meets the preset condition.
  • the length of the interval is a time when the terminal sends the uplink data by the HARQ process that meets the preset condition, and receives the receiving state of the HARQ process that meets the preset condition.
  • the preset condition is at least one of the following conditions: the corresponding time unit is a HARQ process of the earliest time unit in the time domain among the n time units; the timing of the corresponding automatic retransmission timer is the shortest The HARQ process; the HARQ process of the corresponding automatic retransmission timer is greater than the preset length of the HARQ process; and the HARQ process of the uplink data is retransmitted at the earliest in the time domain.
  • n is greater than or equal to two.
  • the feedback information includes the first feedback information and the second feedback information, where the first feedback information is used to indicate that the terminal sends the uplink data by using the first HARQ process on the second time unit, where the second feedback information includes the n HARQ processes.
  • Receive status and time indication information Receive status and time indication information.
  • a method for sending feedback information comprising: the access network device receiving, by the n hybrid units, n uplink automatic retransmission HARQ processes to send uplink data, where n is a positive integer; The device sends the feedback information on the first time unit, where the feedback information includes the receiving state of the n HARQ processes, and the time length between the time unit corresponding to the HARQ process that meets the preset condition in the n HARQ processes and the first time unit is less than or
  • the retransmission waiting duration includes the timing of the automatic retransmission timer, and the automatic retransmission timer is used to trigger the terminal to retransmit the uplink data sent by the HARQ process that meets the preset condition.
  • a feedback information receiving apparatus comprising at least one unit, configured to implement feedback information receiving provided by any one of the first aspect or the first aspect of the first aspect.
  • a feedback information transmitting apparatus comprising at least one unit, wherein the at least one unit is configured to implement any one of the fourth aspect or the fourth aspect or any one of the possible implementations.
  • the transmitter and receiver are configured to be controlled by a processor for implementing the feedback information receiving method provided by any one of the first aspect or the first aspect of the first aspect; or the second aspect The feedback information receiving method provided; or the feedback information receiving method provided by the above third aspect.
  • a tenth aspect provides an access network device, where the access network device includes: a processor, a transmitter and a receiver connected to the processor;
  • the transmitter and the receiver are configured to be controlled by a processor, and the processor is configured to implement the feedback information sending method provided by any one of the foregoing fourth aspect or the fourth aspect; or the fifth aspect The method for transmitting feedback information provided; or the method for transmitting feedback information provided by the sixth aspect above.
  • a computer readable storage medium stores instructions that, when run on a terminal, cause the terminal to perform any one of the first aspect or the first aspect described above
  • a computer readable storage medium stores instructions that, when run on an access network device, cause the access network device to perform the fourth or fourth aspect described above.
  • the feedback information sending method provided by any one of the possible implementations; or the feedback information sending method provided by the fifth aspect; or the feedback information sending method provided by the sixth aspect.
  • a ninth aspect provides a feedback information system, where the system includes a terminal and an access network device, where the terminal is configured to perform the feedback information receiving method provided by the first aspect; or the feedback information receiving method provided by the second aspect Or the feedback information receiving method provided by the third aspect; the access network device is configured to perform the feedback information sending method provided by the fourth aspect; or the feedback information sending method provided by the fifth aspect; or, the sixth The method of sending feedback information provided by the aspect.
  • FIG. 1 is a schematic structural diagram of a mobile communication system according to an exemplary embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an access network device according to an exemplary embodiment of the present disclosure.
  • 4A is a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application.
  • 4B is a schematic diagram of feedback information provided by an exemplary embodiment of the present application.
  • 4C is a schematic diagram of a time delay provided by an exemplary embodiment of the present application.
  • 4D is a flowchart of a feedback information transmission method provided by another exemplary embodiment of the present application.
  • 4E is a schematic diagram of a third time unit provided by an exemplary embodiment of the present application.
  • 4F is a schematic diagram of second feedback information provided by an exemplary embodiment of the present application.
  • 4G is a schematic diagram of a time unit provided by an exemplary embodiment of the present application.
  • 4H is a schematic diagram of a time unit provided by an exemplary embodiment of the present application.
  • 4I is a schematic diagram of a time range provided by an exemplary embodiment of the present application.
  • 4J is a schematic diagram of an automatic retransmission timer provided by an exemplary embodiment of the present application.
  • 4K is a schematic diagram of a relationship between a time range and an automatic retransmission timer provided by an exemplary embodiment of the present application;
  • 4L is a schematic diagram of a relationship between a time range and an automatic retransmission timer provided by an exemplary embodiment of the present application;
  • 4N is a schematic diagram of a relationship between a time range and an automatic retransmission timer provided by an exemplary embodiment of the present application;
  • FIG. 4O is a schematic diagram of an automatic retransmission timer provided by an exemplary embodiment of the present application.
  • FIG. 5 is a schematic diagram of second feedback information provided by an exemplary embodiment of the present application.
  • FIG. 6 is a schematic diagram of second feedback information provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic diagram of feedback information provided by an exemplary embodiment of the present application.
  • FIG. 8 is a flowchart of a feedback information transmission method provided by another exemplary embodiment of the present application.
  • FIG. 9A is a schematic diagram of a primary TxOP provided by an exemplary embodiment of the present application.
  • 9B is a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application.
  • 9C is a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application.
  • FIG. 10 is a block diagram of a feedback information transmission apparatus according to an embodiment of the present application.
  • a “module” as referred to herein generally refers to a program or instruction stored in a memory that is capable of performing certain functions;
  • "unit” as referred to herein generally refers to a functional structure that is logically divided, the "unit” It can be implemented by pure hardware or a combination of hardware and software.
  • Multiple as referred to herein means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • Permitted frequency band The spectrum resource that can be used only after being approved by the management department of the communication industry.
  • Unlicensed frequency band refers to the spectrum resources that can be directly used without the permission of the management department of the communication industry on the premise of meeting the relevant technical requirements. The operator can realize the network capacity diversion by transmitting data using the unlicensed frequency band.
  • LBT For the unlicensed frequency band, before each communication device (access network device or terminal) sends data on a certain channel, it needs to detect whether the current channel is idle, that is, whether other nearby communication devices are occupying the channel. To transmit data; if the channel is detected to be idle for a period of time, the communication device can transmit data on the current channel, but the length of time during which the communication device transmits data is limited, within the limited time range The communication device does not need to perform the process of detecting whether the current channel is idle again; if it is detected that the channel is occupied, the communication device cannot transmit data on the current channel. The process of detecting whether the current channel is idle is also referred to as Clear Channel Assessment (CCA). This embodiment does not limit the specific name of the process of detecting whether the current channel is idle.
  • CCA Clear Channel Assessment
  • Transmission Opportunity refers to the communication device that does not need to re-evaluate the channel through the CCA after the opportunity to compete for the use of the unlicensed band through Clear Channel Assessments (CCA).
  • CCA Clear Channel Assessments
  • the TxOP may include only the time unit in the downlink duration, or may only include the time unit in the uplink duration, and may include both the time unit in the downlink duration and the time unit in the uplink duration.
  • the time unit in the downlink duration refers to a time unit for transmitting downlink data
  • the time unit in the uplink duration refers to a time unit used for transmitting uplink data.
  • the TxOP may also be referred to as a Channel Occupancy, or the TxOP may also be referred to as a Maximum Channel Occupancy Time (MCOT), which is not limited in this embodiment.
  • MCOT Maximum Channel Occupancy Time
  • Uplink Grant refers to the control information sent to the terminal when the access network device allows the terminal to transmit uplink data.
  • the UL grant includes control information for controlling an uplink transmission resource used by the terminal to transmit uplink data and a transmission mode used.
  • No uplink scheduling grant (UL grant free) transmission refers to the uplink scheduling resource that the terminal does not need to access the network device, and can select the uplink transmission resource directly from the pre-configured or predefined resource pool.
  • the resource pool includes a first resource pool for initial transmission of uplink data during a UL grant free transmission and/or a second resource pool for retransmitting uplink data during a UL grant free transmission.
  • the first resource pool and the second resource pool may be the same.
  • LAA Licensed Assisted Access
  • LTE Long Term Evolution
  • CA Carrier Aggregation
  • non-CA Non-CA
  • the usage scenario of the LAA-LTE system is a scenario in which the licensed frequency band and the unlicensed frequency band are jointly used by the CA
  • the cell working in the licensed frequency band is used as the primary cell
  • the cell working in the unlicensed frequency band is used as the secondary cell.
  • the primary cell and the secondary cell may be deployed in a common station or in a non-common station, and an ideal backhaul path between the primary cell and the secondary cell.
  • the usage scenario of the LAA-LTE system is not a scenario in which the licensed band and the unlicensed band are jointly used by the CA, such as a dual connectivity (DC) scenario
  • the cell working on the licensed band is used as the primary.
  • the cell working in the unlicensed band is used as the secondary cell, and there is no ideal backhaul path between the primary cell and the secondary cell. For example, the backhaul delay is large.
  • the carrier and the cell are regarded as equivalent concepts, that is, the terminal accesses one carrier and accesses one cell is equivalent.
  • the cell mentioned in this application is a cell corresponding to the access network device, and the cell may belong to the macro access network device, or may belong to the access network device corresponding to the small cell, where the small cell may include : Metro cell, Micro cell, Pico cell, Femto cell, etc.
  • the small cell has the characteristics of small coverage and low transmission power, and is suitable for providing high rate. Data transfer service.
  • FIG. 1 is a schematic structural diagram of a mobile communication system provided by an exemplary embodiment of the present application.
  • the mobile communication system may be an LTE system; it may be a LAA-LTE system, a Standalone ULTE system, or a 5G system, and the 5G system is also called a New Radio (NR) system, which is not limited in this embodiment.
  • the mobile communication system includes an access network device 120 and a terminal 140.
  • the access network device 120 can be a base station, and the base station can be used to convert the received radio frame with the IP packet message, and can also coordinate the attribute management of the air interface.
  • the base station may be an evolved base station (eNB or e-NodeB) in LTE, or a base station employing a centralized distributed architecture in a 5G system.
  • eNB evolved base station
  • e-NodeB evolved base station
  • the access network device 120 adopts a centralized distributed architecture it generally includes a central unit (CU) and at least two distributed units (DUs).
  • a centralized data unit is provided with a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Media Access Control (MAC) layer protocol stack;
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Media Access Control
  • a physical layer (Physical, PHY) protocol stack is provided in the unit.
  • the specific implementation manner of the access network device 120 in this embodiment of the present application is not limited.
  • the access network device may further include a home base station (Home eNB, HeNB), a relay, a pico base station Pico, and the like.
  • the access network device 120 and the terminal 140 establish a wireless connection through the wireless air interface.
  • the wireless air interface is a wireless air interface based on a 5G standard, for example, the wireless air interface is a New Radio (NR); or the wireless air interface may also be a wireless technology based on a 5G-based next-generation mobile communication network technology standard.
  • the air interface; or the wireless air interface may also be a wireless air interface based on the 4G standard (LTE system).
  • the access network device 120 can receive the uplink data transmitted by the terminal 140 through a wireless connection.
  • Terminal 140 may refer to a device that is in data communication with access network device 120.
  • the terminal 140 can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • RAN Radio Access Network
  • the terminal 140 can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the terminal 140 may also be a relay device, which is not limited in this embodiment.
  • the terminal 140 can transmit uplink data to the access network device 120 through a wireless connection with the access network device 120.
  • the sending, by the terminal 140, the uplink data to the access network device 120 may be based on the UL grant free transmission, that is, the terminal 140 selects the uplink transmission resource from the resource pool to transmit the uplink data; or, based on the UL grant transmission, ie, the terminal
  • the sending of the scheduling request (SR) to the access network device, the access network device transmitting the UL grant to the terminal according to the SR, or the transmission resource corresponding to the uplink data transmitted by the terminal 140 is the access network device passing the UL grant
  • the scheduling is implemented by the terminal, and the terminal transmits the uplink data according to the control information in the UL grant, which is not limited in this embodiment.
  • multiple access network devices 120 and/or multiple terminals 140 may be included, and one access network device 120 and one terminal 140 are shown in FIG.
  • this embodiment does not limit this.
  • FIG. 2 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.
  • the terminal may be the terminal 140 in the mobile communication system shown in FIG. 1. This embodiment is described by taking the terminal 140 as an LTE system or a UE in a 5G system.
  • the terminal includes a processor 21, a receiver 22, a transmitter 23, a memory 24, and a bus 25.
  • the processor 21 includes one or more processing cores, and the processor 21 executes various functional applications and information processing by running software programs and modules.
  • the memory 24 is connected to the processor 21 via a bus 25.
  • the memory 24 stores program instructions and data necessary for the terminal.
  • the processor 21 is operative to execute program instructions and data in the memory 24 to implement the functions of the various steps in the various method embodiments of the present application.
  • the processor 21 controls the receiver 22 to execute the following steps 402, 802, and the terminal-side receiving function implied in each step by running at least one program instruction in the memory 24; the processor 21 runs through the memory 24. At least one program instruction controls the transmitter 23 to implement steps 403, 405 and the terminal side transmission functions implied in the respective steps.
  • memory 24 can be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable In addition to Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Figure 2 only shows a simplified design of the terminal.
  • the terminal may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all terminals that can implement the present application are within the scope of the present application.
  • FIG. 3 is a schematic structural diagram of an access network device provided by an exemplary embodiment of the present application.
  • the terminal may be the network access device 120 in the mobile communication system shown in FIG. 1.
  • the access network device 120 is an eNB in an LTE system, or a gNB in a 5G system, where the access network device includes: a processor 31, a receiver 32, a transmitter 33, a memory 34, and a bus. 35.
  • the processor 31 includes one or more processing cores, and the processor 31 executes various functional applications and information processing by running software programs and modules.
  • the memory 34 is connected to the processor 31 via a bus 35.
  • the memory 54 stores program instructions and data necessary for the terminal.
  • the processor 51 is operative to execute program instructions and data in the memory 54 to implement the functions of the various steps in the various method embodiments of the present application.
  • the processor 31 controls the receiver 32 to implement the following steps 404, 406 and the receiving function of the access network device side implied in each step by running at least one program instruction in the memory 34; the processor 31 operates by running the memory 34. At least one program instruction controls the transmitter 33 to implement the transmission function of the access network device side implied in step 401, step 801 and each step.
  • Figure 3 only shows a simplified design of the access network device.
  • the access network device can include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all access network devices that can implement the present application are in the present application. Within the scope of protection.
  • FIG. 4A shows a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application, which is used in the mobile communication system shown in FIG. 1.
  • the method includes the following steps.
  • Step 401 The access network device sends feedback information on the first time unit.
  • the length of time of the first time unit may be represented by the length of time of the transmission time interval TTI.
  • TTI can be measured in milliseconds (ms) or Orthogonal Frequency Division Multiplexing (OFDM).
  • the length of a TTI is 0.5 ms, or 7 symbols, 4 Symbol, 3 symbols or 2 OFDM symbols or 1 OFDM symbol. Since a variable TTI mechanism is introduced in the 5G system, this embodiment does not limit the specific length of the TTI.
  • a time unit may be understood as a minimum unit for carrying data transmission, where the data includes control data and/or service data.
  • the access network device sends feedback information when the scheduling terminal needs to send uplink data; and/or, the access network device sends feedback information when it needs to feed back the receiving state of the uplink data.
  • the feedback information is control information included in the UL grant; or is control information that has the same function as the UL grant but other signaling with different signaling names, such as feedback information for scheduling uplink data transmission.
  • the UL grant may be the signaling transmitted by the downlink control information (DCI) format 0, 0A, 0B, 4, 4A, 4B in the LTE system, or may be the downlink control information of the 5G system.
  • DCI downlink control information
  • the signaling of the format transmission, of course, the downlink control information may also be other types of downlink control information, which is not limited in this embodiment.
  • the feedback information is described below.
  • the feedback information includes first feedback information and second feedback information.
  • the first feedback information is used by the scheduling terminal to send uplink data by using the first HARQ process.
  • the uplink data sent by the first HARQ process is the second uplink data that is initially transmitted by the first HARQ process, or the uplink data sent by the first HARQ process is the first uplink data that is retransmitted by the first HARQ process.
  • the first HARQ process is one of all uplink HARQ processes supported by the terminal; or the first HARQ process is one of all uplink HARQ processes supported by the terminal for UL grant free transmission.
  • the first HARQ process corresponds to an index number HPN#i
  • the terminal first transmits the first uplink data by using the first HARQ process; and/or, the terminal retransmits the first uplink data by using the first HARQ process; And/or, the terminal first transmits the second uplink data by using the first HARQ process.
  • the second uplink data is different from the first uplink data.
  • the access network device When the access network device receives the first uplink data that is sent by the terminal through the first HARQ process, and determines that the receiving state of the first uplink data is the acknowledged receiving state ACK, the first feedback information is used by the first network. And transmitting, by the first HARQ process, the second uplink data, that is, the second uplink data that is first transmitted by the first HARQ process.
  • the access network device When the access network device receives the first uplink data sent by the terminal through the first HARQ process before the first time unit, and determines that the receiving state of the first uplink data is the non-acknowledgment receiving state NACK, the first feedback information is used.
  • the scheduling terminal retransmits the first uplink data by using the first HARQ process.
  • the first feedback information is used by the scheduling terminal to initially transmit the first uplink data by using the first HARQ process.
  • the first feedback information is used by the scheduling terminal to initially transmit uplink data through the first HARQ process.
  • the second feedback information is a reception state of n second HARQ processes, the second HARQ process is a HARQ process of the terminal, and n is a positive integer.
  • the feedback information is terminal-specific control information, and may be scrambled by the terminal-specific C-RNTI, and the terminal may determine, according to the specific C-RNTI, that the second feedback information is the n second HARQs of the terminal. The receiving status of the process.
  • n second HARQ processes are used for the terminal to send other uplink data on other time units.
  • the other time unit refers to a time unit different from the first time unit, or the other time unit refers to a time unit that sends uplink data by using the first HARQ process; other uplink data refers to and passes the first HARQ.
  • the upstream data sent by the process has different uplink data.
  • the time unit of the uplink data sent by the first HARQ process may be the same in the frequency division duplex (FDD) scenario. Not limited.
  • the other time unit may also be the same time unit as the first time unit, that is, in this scenario, the terminal may have the capability of transmitting multiple HARQ processes on one same time unit, and at this time, the terminal further The ability to support transmission of multiple HARQ processes on one time unit can be reported to the access network device so that the access network device can determine whether other time units need to be different from the first time unit.
  • the n second HARQ processes are n uplink HARQ processes in all uplink HARQ processes supported by the terminal; or, the n second HARQ processes are all in the uplink HARQ process supported by the terminal for UL grant free transmission.
  • the number of all uplink HARQ processes used for UL grant free transmission may be equal to n.
  • the maximum value of all uplink HARQ processes supported by the terminal is n+1, that is, all uplink HARQ processes supported by the terminal include: n second HARQ processes and a first HARQ process; or, the terminal
  • the maximum value of all supported uplink HARQ processes for UL grant free transmission is n+1, that is, all uplink HARQ processes supported by the terminal for UL grant free transmission include: n second HARQ processes and first HARQ process
  • the maximum value of all uplink HARQ processes supported by the terminal for UL grant free transmission is n, that is, all uplink HARQ processes supported by the terminal for UL grant free transmission include: n second HARQ processes.
  • the maximum value of all uplink HARQ processes supported by the terminal for UL grant free transmission is less than or equal to the maximum value of all uplink HARQ processes supported by the terminal.
  • each of the second HARQ processes in the n second HARQ processes corresponds to a process number
  • the process IDs in the different second HARQ processes are different
  • the process ID of each second HARQ process is first.
  • the process number of the HARQ process is different.
  • the terminal supports four uplink HARQ processes, and the process numbers corresponding to the four uplink HARQ processes are 0, 1, 2, and 3, respectively. If the process number of the first HARQ process is 0, the process number of the second HARQ process is It is 1, 2, and 3.
  • the terminal may not send the other uplink data by using the second HARQ process, that is, when the access network device sends the feedback information to the terminal, the terminal may not receive the terminal.
  • the other uplink data sent by the second HARQ process cannot determine the receiving state of the other uplink data.
  • the access network device sets the receiving state of the other uplink data to the default receiving state.
  • the default receiving state is a non-acknowledgment receiving state NACK; or the default receiving state is DTX.
  • the receiving state of the n second HARQ processes includes: a receiving state when the terminal sends other uplink data through the second HARQ process (in this case, the second HARQ process is the second HARQ process that the terminal has used) And/or a default receiving state when the terminal does not send other uplink data through the second HARQ process (in this case, the second HARQ process is a second HARQ process that is not used by the terminal).
  • the second feedback information generated by the access network device includes the receiving state of the n second HARQ processes, and the length of the second feedback information is fixed. Therefore, the complexity of blindly checking the second feedback information by the terminal is reduced, thereby saving The overhead of the terminal.
  • the second feedback information generated by the access network device may also indicate only the receiving status of a part of the second HARQ process.
  • the partial HARQ process is a second HARQ process that receives a non-acknowledgement state NACK; or, the partial HARQ process is a valid second HARQ process.
  • the effective second HARQ process refers to the second HARQ process corresponding to each other uplink data received by the access network device before the feedback information is sent.
  • the second feedback information may include a process number corresponding to a part of the second HARQ process.
  • the second feedback information is further used to indicate a receiving state that the terminal corresponds to by the first HARQ process.
  • the second feedback information includes a receiving state corresponding to the n uplink HARQ processes and the first HARQ process.
  • the feedback information is composed of two parts: DCI group 1 (second feedback information) and DCI group 2 (first feedback information).
  • the DCI group 1 is used to indicate the receiving state corresponding to the n+1 uplink HARQ processes; the DCI group 2 is used to schedule the terminal to send the uplink data through the first HARQ process.
  • DCI indicates Downlink Control Information.
  • the reception status is described below.
  • the reception status includes an acknowledgement reception status ACK and a non-acknowledgement reception status NACK.
  • the acknowledgement reception status ACK is used to indicate that the uplink data is correctly received by the access network device.
  • the non-acknowledged reception status NACK includes an unreceived state and/or an incorrectly received state.
  • the unreceived state is used to indicate that the uplink data is not received by the access network device;
  • the incorrectly received state is used to indicate that the uplink data is received by the access network device, but the uplink data received by the access network device and the uplink sent by the terminal The data is different, that is, the wrong upstream data is received.
  • Step 402 The terminal receives feedback information on the first time unit.
  • the distance between the access network device and the terminal is a certain distance. Therefore, from the perspective of the absolute time, the location of the first time unit in which the access network sends the feedback information in the embodiment, and the first time the terminal receives the feedback information The location of the time unit is different. In other words, the time unit in which the access network device sends the feedback information has a certain delay compared to the time unit in which the terminal receives the feedback information.
  • the terminal transmits feedback information at the third time unit 46
  • the access network device receives the feedback information at the third time unit 48, and there is a certain transmission delay 49 between the third time unit 48 and the third time unit 46.
  • the terminal After receiving the feedback information, the terminal parses the feedback information to obtain the first feedback information and the second feedback information.
  • Step 403 The terminal sends uplink data by using the first HARQ process on the second time unit according to the first feedback information.
  • the time interval between the second time unit and the first time unit is predefined; or, is pre-configured by the access network device; or is dynamically notified by the access network device; or The terminal dynamically notifies the access network device.
  • the terminal If the terminal sends the first uplink data to the access network device by using the first HARQ process, the terminal determines whether the first uplink data needs to be retransmitted, and first transmits the second uplink data according to the first feedback information. , or retransmit the first uplink data.
  • the terminal If the terminal does not send the uplink data to the access network device by using the first HARQ process before the first time unit, the terminal first transmits the first uplink data according to the first feedback information.
  • Step 404 The access network device receives the uplink data sent by the terminal through the first HARQ process on the second time unit.
  • the feedback information transmission method is that the first feedback information and the second feedback information are jointly sent to the terminal through the access network device, so that after receiving the feedback information, the terminal can learn other uplink data correspondingly.
  • the receiving state can be used to learn the resources required for retransmitting the first uplink data or the first uplink data; the first feedback information and the second feedback information are sent to the terminal without the access network device, so that the terminal only needs to be
  • the blind feedback is performed by receiving the feedback information, and the first feedback information and the second feedback information are separately subjected to blind detection, thereby reducing the number of blind detections of the terminal.
  • the terminal device misses the feedback corresponding to the second HARQ process even before receiving the feedback information including the first feedback information and the second feedback information.
  • the information may also be used to determine the feedback information corresponding to the second HARQ process by using the feedback information including the first feedback information and the second feedback information, thereby increasing the robustness of the second HARQ process feedback information, and is particularly suitable for transmission reliability.
  • transport services such as URLLC.
  • each independent DCI needs to be scrambled by using a user-specific identification code, that is, the first feedback information and the second After the feedback information, add a user-specific identification code.
  • the user-specific identification code refers to a Cell Radio Network Temporary Identifier (C-RNTI) including 16 bits.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the first feedback information and the second feedback information are jointly fed back, so that the access network device only needs to add a specific identification code after the feedback information, thereby reducing the channel occupied by one identification code. Resources, which saves channel overhead.
  • the timeliness of the access network device feeding back the receiving status of the uplink data is improved.
  • the access network device needs to perform the LBT before transmitting the feedback information, and the feedback information can be transmitted by using the unlicensed spectrum when the channel is detected to be idle. After the competition to the unlicensed band resource, the access network device feeds back all the second HARQ processes corresponding to the terminal, or all the receiving states of the second HARQ process for the UL grant free, to ensure the adoption.
  • the timeliness of the feedback of the uplink data by the access network device helps to facilitate the transmission of uplink data on the licensed spectrum.
  • the steps 401 and 404 can be implemented as a method embodiment on the access network device side.
  • the steps 402 and 403 can be implemented as a method on the terminal side.
  • the time lengths of different time units may be the same or different.
  • the first time unit and the second time unit may be in the same TTI or in different TTIs; the third time unit and the first time unit may be in the same TTI or in different TTIs.
  • the uplink data includes uplink service data and/or uplink control data, where the uplink data includes the first uplink data and the second uplink data in this step.
  • the access network device and the terminal transmit uplink data based on the UL grant mechanism, and the access network device first schedules the terminal to send uplink data through the first HARQ process.
  • the terminal needs to know the uplink transmission resource required for sending the uplink data. Therefore, the access network device needs to send the first feedback information to the terminal to notify the terminal of the uplink transmission resource.
  • the access network device needs to send the uplink transmission resource required for transmitting the first uplink data to the terminal before the terminal sends the first uplink data through the first HARQ process.
  • the access network device and the terminal transmit uplink data based on the UL grant free mechanism.
  • the terminal selects the uplink transmission resource from the resource pool and uses the transmission resource to send the first HARQ process.
  • the access network device may schedule the terminal to retransmit the first uplink data or first transmit the second uplink data by using the first feedback information.
  • FIG. 4D shows a flowchart of a feedback information transmission method provided by another exemplary embodiment of the present application, which is used in FIG. In a mobile communication system.
  • the method includes the following steps.
  • Step 405 The terminal sends the first uplink data by using the first HARQ process on the third time unit.
  • the third time unit is located before the first time unit.
  • the third time unit may be the time unit closest to the time at which the terminal has the need to transmit the first uplink data.
  • the terminal needs to process the first uplink data, for example, encoding, modulating, etc., the first uplink data, and the processing takes a certain time.
  • the third time unit may also be a time unit having a certain time delay from the time when the terminal has a demand for transmitting the first uplink data.
  • the third time unit is a time unit determined by the terminal based on the UL grant free transmission mechanism.
  • the time position corresponding to the UL grant free transmission resource is determined by a predefined or pre-configured mode of the access network device, where the time position can be represented by a time unit.
  • a time unit that is closest to the required time and after the required time may be selected as the third time unit.
  • the terminal processes the first uplink data, and sends the first HARQ process in the third time unit 44 (ie, the third TTI). First uplink data.
  • the uplink data sent by the first HARQ process includes first uplink data and/or second uplink data.
  • the first uplink data sent by the terminal on the third time unit may be based on uplink scheduling, or may be based on UL grant free.
  • Step 406 The access network device receives, on the third time unit, the first uplink data that is sent by the terminal by using the first HARQ process.
  • the distance between the access network device and the terminal is a certain distance. Therefore, from the perspective of the absolute time, the terminal sends the location of the third time unit of the first uplink data, and the access network device receives the first.
  • the location of the third time unit of the uplink data is different. In other words, the time unit in which the access network device receives the uplink data has a certain delay compared to the time unit in which the terminal transmits the uplink data.
  • the access network device After receiving the first uplink data, the access network device processes the received first uplink data to recover the first uplink data sent by the terminal, for example, the terminal demodulates, decodes, and the like the first uplink data. deal with. During processing, the access network device determines the reception status of the first uplink data.
  • the manner in which the access network device determines the receiving status of the first uplink data includes, but is not limited to, decoding and/or Cyclic Redundancy Check (CRC).
  • CRC Cyclic Redundancy Check
  • step 401 After the access network device determines the receiving state of the first uplink data, the receiving state needs to be fed back to the terminal, that is, step 401 is performed.
  • the access network device determines that the receiving state of the first uplink data is the acknowledgment receiving state ACK
  • the first feedback information generated by the access network device schedules the terminal to initially transmit the uplink data by using the first HARQ process.
  • the terminal first transmits the second uplink data by using the first HARQ process on the second time unit according to the first feedback information.
  • step 403 the terminal needs to determine whether to retransmit the first uplink data or the first transmission of the second uplink data.
  • the terminal determines, according to the receiving state corresponding to the first HARQ process in the second feedback information, that the first feedback information is used for scheduling terminal retransmission.
  • the scheduling terminal For uplink data, the scheduling terminal also transmits the second uplink data.
  • the terminal determines, according to the indication information carried in the first feedback information, that the first feedback information is used by the scheduling terminal to retransmit the first uplink. Data, or the scheduling terminal first transmits the second uplink data.
  • the terminal determines, according to other control information included in the downlink channel that carries the feedback information, that the first feedback information is used by the scheduling terminal to retransmit the first uplink data.
  • the scheduling terminal first transmits the second uplink data.
  • the indication information or other control information is used to indicate whether the terminal retransmits the first uplink data.
  • the first feedback information is used by the scheduling terminal to retransmit the first uplink data on the third time unit.
  • the indication information in the first feedback information indicates that the terminal initially transmits the second uplink data
  • the first feedback information is used by the scheduling terminal to initially transmit the second uplink data on the third time unit.
  • the terminal selects an uplink transmission resource for initial transmission of the second uplink data from the configured first resource pool according to the configuration information of the first resource pool.
  • the second uplink data is initially transmitted by selecting the uplink transmission resource.
  • the terminal selects an uplink transmission resource for retransmitting the first uplink data from the configured second resource pool according to the configuration information of the second resource pool.
  • the first uplink data is retransmitted by the selected uplink transmission resource.
  • the first feedback information includes a process ID of the first HARQ process, so that the terminal can determine that the first feedback information is used to schedule uplink data corresponding to the first HARQ process.
  • the first feedback information does not include the process ID of the first HARQ process, so that when the terminal receives the first feedback information on the first time unit, the terminal can be configured according to the time between the third time unit and the first time unit.
  • the interval is determined by the first feedback information for scheduling the uplink data corresponding to the first HARQ process, that is, the process number of the first HARQ process is implicitly indicated by the time interval between the third time unit and the first time unit.
  • the maximum value of all uplink HARQ processes supported by the terminal is 8, and the process numbers of the eight uplink HARQ processes are #0, #1, #2, #3, #4, #5, #6, respectively. #7.
  • the second HARQ process is the remaining uplink HARQ process, that is, HPN#0, HPN#1, HPN#3- Upstream HARQ process corresponding to HPN#7.
  • the meaning of HPN is the HARQ Process Number.
  • the second feedback information generated by the time units may include at least the receiving state of the uplink data corresponding to the five uplink HARQ processes (ie, the receiving states of other uplink data corresponding to HPN#0, HPN#1, HPN#3-HPN#5) .
  • the second feedback information may further include a receiving state of the uplink data corresponding to the HPN #2.
  • the second feedback information further includes receiving states of other uplink data corresponding to HPN #6 and HPN #7. Due to the processing delay, the receiving status of other uplink data corresponding to HPN #6 and HPN #7 in the second feedback information generated by the access network device does not truly reflect the receiving status of the two second HARQ processes. At this time, the reception state of HPN #6 and HPN #7 can be reflected by the default reception state.
  • the first feedback information is used by the scheduling terminal to retransmit the first uplink data or the first uplink data by using the first HARQ process.
  • the first feedback information is further used to schedule the second HARQ process to send other uplink data.
  • the first feedback information shown in FIG. 4F is used to schedule uplink data corresponding to the first HARQ process HPN#2, and the second feedback information is HPN#0, HPN#1, HPN#3, HPN#. 4.
  • the receiving state corresponding to HPN#5, HPN#6, and HPN#7, and the first feedback information and the second feedback information are all received in the first time unit.
  • the line connecting the first feedback information and the second feedback information in FIG. 4F is not used to indicate the time unit, but is used to indicate the process number of the associated uplink HARQ process.
  • the terminal sends other uplink data by using the second HARQ process before sending the first uplink data by using the first HARQ process; and/or, after the first uplink data is sent by the first HARQ process, the terminal passes the second HARQ.
  • the process sends other uplink data, which is not limited in this embodiment.
  • the second UL grant sent by the access network device to the terminal also includes the receiving status corresponding to the multiple uplink HARQ processes.
  • the access network The device carries a new data indicator (NDI) in the first UL grant, where the NDI is used to indicate the process ID corresponding to each uplink HARQ process.
  • the terminal can determine the corresponding uplink HARQ according to the NDI. Process to determine the corresponding receiving status.
  • the access network device When the uplink data is transmitted between the access network device and the terminal based on the UL grant free, the access network device does not send the first UL grant to the terminal, and the terminal selects the uplink transmission resource to transmit the uplink data. At this time, in the LTE system. The manner of determining the receiving state corresponding to the uplink HARQ process is no longer applicable.
  • the second feedback information when the second feedback information includes a receiving state corresponding to the multiple uplink HARQ processes, in order to ensure that the terminal can confirm which uplink data is associated with each receiving state, the second feedback information adopts a bitmap.
  • the form indicates the receiving status.
  • the bitmap includes a preset number of bits, and for each bit in the bitmap, the bit is used to indicate a receiving state corresponding to an uplink HARQ process, and different bits are used to indicate a receiving state corresponding to the corresponding uplink HARQ process.
  • the uplink HARQ process corresponding to each receiving state can be implicitly indicated in the form of a bitmap, so that the uplink data corresponding to each receiving state can be implicitly indicated. Therefore, the second feedback information may not include each The process ID of the upstream HARQ process.
  • the reception state corresponding to the uplink HARQ process corresponding to the bit is represented by a different state of each bit in the bitmap.
  • the bit number of the bitmap is 8 bits, and the representation is X. 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 .
  • the value of X i is 0 or 1, for indicating the reception state of the uplink HARQ process corresponding to the i-th, or process ID for indicating the reception state #HPN (i-1) corresponding to the uplink HARQ process.
  • 0 indicates that the reception status is the acknowledgment reception status ACK
  • 1 indicates that the reception status is the non-acknowledgment reception status NACK.
  • 1 indicates that the status is ACK and 0 indicates NACK.
  • the access network device determines that the reception status of the uplink data corresponding to HPN#0 and HPN#1 is the acknowledgement reception status ACK, and the reception status of the uplink data corresponding to HPN#2-HPN#5 is the non-acknowledgment reception status. NACK, then the representation of X 1 X 2 X 3 X 4 X 5 X 6 X 7 X 8 is 11000000, wherein the access network device can process the uplink data corresponding to HPN#6 and HPN#7 in the future, therefore, HPN#
  • the reception status of the uplink data corresponding to HPN#7 may be the default reception status NACK.
  • the number of bits (bit number) of the bitmap is equal to the number of uplink HARQ processes in the second feedback information; or, the number of bits (bit number) of the bitmap is greater than the number of uplink HARQ processes in the second feedback information.
  • the access network device does not use a bitmap to indicate the receiving status, but uses a non-bitmap form to indicate the receiving status.
  • each bit combination and the 1 bit constitute a receiving state corresponding to each uplink HARQ process, thereby obtaining second feedback information.
  • n+1 is the maximum value of the uplink HARQ process supported by the terminal, or n+1 is the maximum value of the uplink HARQ process supported by the terminal for UL grant free transmission.
  • the access network device indicates the reception status by one bit, where 0 indicates that the reception status is the acknowledgment reception status ACK, and 1 indicates that the reception status is the non-acknowledgment reception status NACK.
  • the access network device determines that the reception status of the uplink data corresponding to HPN#0 and HPN#1 is the acknowledgment reception status ACK, and the reception status of the uplink data corresponding to HPN#2-HPN#5 is the non-acknowledgment reception status.
  • the second feedback information is 0001 (the receiving state of the uplink HARQ process with the process number 0 is the acknowledged receiving state ACK), and the 0011 (the receiving state of the uplink HARQ process indicating the process number 1 is the acknowledged receiving state ACK), 0100 (received that the receiving state of the uplink HARQ process with the process number 2 is the non-acknowledgment receiving state NACK), 0110 (the receiving state of the uplink HARQ process with the process number 3 is the non-acknowledged receiving state NACK), and 1000 (the process number is The reception state of the uplink HARQ process of 4 is the non-acknowledgment reception state NACK), 1010 (the reception state of the uplink HARQ process indicating the process number 5 is the non-acknowledgment reception state NACK), and 1100 (the uplink HARQ process indicating the process number of 6)
  • the receiving state is the default receiving state NACK)
  • 1110 the receiving state of the uplink HARQ process indicating the process
  • the second feedback information includes a receiving state corresponding to the multiple uplink HARQ processes
  • the second feedback information includes multiple receiving states. It is also possible to have a specific correspondence with the time position at which the terminal transmits uplink data.
  • the reception state may correspond to a time unit set included between the (#nx) time unit and the (#ny) time unit, where the time unit set may include a (#nx) time unit and a (#ny) time unit, where x and y may be pre-configured by the access network device, or dynamically notified, or notified by the terminal to the access network device, or may be notified by other means.
  • the second feedback information transmitted by the access network device in the (#n) time unit includes 5 bits, respectively, the terminal is at (#n-6), (# The reception state corresponding to the uplink data transmitted by the time unit of n-5), (#n-4), (#n-3), and (#n-2).
  • the access network device feeds back the second feedback information, only the uplink data sent by the terminal in the (#n-6) and (#n-4) time units is received, and the two uplink data are determined.
  • the corresponding receiving state is the acknowledged receiving state ACK, and the access network device can only set the bit information corresponding to the two time units in 5 bits as ACK, and the remaining 3 bits information adopts the default receiving state NACK.
  • the second feedback information may also not include the process number of the uplink HARQ process.
  • the second feedback information generated by the access network device is fed back for each codeword.
  • each codeword corresponds to one uplink.
  • the second feedback information generated by the access network device is jointly fed back to multiple codewords transmitted by the same time unit.
  • multiple codewords transmitted by the same time unit correspond to the same uplink HARQ process.
  • the value of n is 1; or, the value of n is greater than or equal to 2. In the present application, the value of n is greater than or equal to 2 as an example.
  • the sending, by the terminal, the uplink data by using the n second HARQ processes on the n time units means that each time unit corresponds to one second HARQ process, and the terminal sends the uplink data in each time unit through the corresponding second HARQ process.
  • n time units are consecutive in the time domain; or, n time units are discontinuous in the time domain.
  • the terminal sends uplink data through the uplink HARQ process with the process number 0 on the jth-5th time unit; and sends the uplink data through the uplink HARQ process with the process number 1 on the j-4th time unit; Sending uplink data through the uplink HARQ process with process number 2 on j-3 time units; transmitting uplink data through the uplink HARQ process with process number 3 on the j-2th time unit; receiving n on the jth time unit
  • the receiving state and time indication information corresponding to the second HARQ process, that is, the jth time unit is the first time unit.
  • the time unit corresponding to each uplink HRAQ process is continuous in the time domain.
  • the terminal sends the uplink data by using the uplink HARQ process of the HARQ process number i. It can be understood that the terminal sends the uplink data of the HARQ process ID i, where i can be an integer not less than 0.
  • the terminal sends uplink data through the uplink HARQ process with the process number 1 on the j-5th time unit; and sends the uplink data through the uplink HARQ process with the process number 2 on the j-3th time unit;
  • the uplink data is sent by the uplink HARQ process with the process number 3 on the j-1 time units; the reception state and the time indication information corresponding to the n second HARQ processes are received on the jth time unit, that is, the jth time unit Is the first time unit.
  • the time unit corresponding to each uplink HRAQ process is discontinuous in the time domain.
  • the time indication information indicates a time unit corresponding to the receiving state of each uplink HARQ process by using a display indication manner. That is, the second feedback information includes information bits corresponding to the time indication information.
  • the time unit corresponding to the receiving state of each uplink HARQ process refers to a time unit for transmitting uplink data by the uplink HARQ process.
  • the second feedback information includes a 3 bit receiving state, where the 3 bit receiving state is a receiving state corresponding to the uplink HARQ process of the HARQ process number 1 in FIG. 4H, and the time unit corresponding to the receiving state is the j-5th
  • the receiving state corresponding to the uplink HARQ process of the time unit and the HARQ process number is 2, and the time unit corresponding to the receiving state is the receiving state corresponding to the uplink HARQ process of the j-3th time unit and the HARQ process number 3, and the receiving state
  • the corresponding time unit is the j-1th time unit.
  • the time indication information in the second feedback information indicates a time unit corresponding to a receiving state of each second HARQ process.
  • the time indication information indicates the j-5th time unit, the j-3th time unit, and the j-1th time unit.
  • the time indication information in the second feedback information indicates a time range, where the time range includes a time unit corresponding to a receiving state of the n second HARQ processes.
  • the time indication information indicates a time range including n time units.
  • the terminal determines a time unit for performing uplink data transmission from a time range indicated by the time indication information, and each time unit for uplink data transmission corresponds to one receiving.
  • the state and an uplink HARQ process can determine an uplink HARQ process corresponding to each receiving state.
  • the j-5th time unit corresponds to an uplink HARQ process with a HARQ process number of 1
  • the j-3th time unit corresponds to an uplink HARQ process with a HARQ process number of 2
  • the j-1th time unit Corresponding to the uplink HARQ process with the HARQ process number 3.
  • the receiving status in the second feedback information is 3 bits, respectively, used to indicate: ACK, NACK, and ACK; and the time range indicated by the time indication information in the second feedback information is [j-5, j-1], then the time is from the time
  • the time unit (#j-5) for the uplink data transmission in the time domain determined in the range corresponds to the reception status ACK corresponding to the first bit information, and the reception status ACK is the uplink HARQ process with the HARQ process number 1 a receiving state;
  • a second time unit (#j-3) for the uplink data transmission determined from the time range corresponds to a receiving state NACK corresponding to the second bit information, and the receiving state NACK is a HARQ process number a receiving state of the uplink HARQ process of 2;
  • a third time unit (#j-1) for uplink data transmission determined from the time range corresponds to a receiving state ACK corresponding to the third bit information, the receiving state ACK
  • the time indication information indicates a time range including n time units
  • the time indication information includes, but is not limited to, the following representations.
  • the first type the time indication information includes the time start and time end of the time range.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-5) time unit and (#j-1) time unit.
  • the time indication information includes the time start and length of time of the time range.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-5) time units and time lengths of 5 time units.
  • the time indication information includes the time end of the time range and the length of time.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-1) time unit and time length 5 time units.
  • the time indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured.
  • the time starting point of the access network device configuring the time range for the terminal is the pth time unit before the first time unit, and p is a positive integer.
  • the time end point of the access network device pre-configuring the time range for the terminal is the qth time unit before the first time unit, and q is a positive integer.
  • p is greater than q.
  • the time end of the time range configured by the access network device for the terminal is a time unit or a first time unit before the first time unit.
  • the time range is [j-5, j-1]
  • the time indication information includes a time length of 5 time units
  • the time end of the time range configured by the access network device for the terminal is the first time.
  • the fifth type the time indication information includes a time start or a time end of the time range, and the time length of the time range is pre-configured.
  • the time length of the time range configured by the access network device for the terminal is associated with the number of bits corresponding to the receiving states of the n second HARQ processes.
  • the time unit of the time range includes three time units for uplink data transmission. Illustratively, in FIG.
  • the time range is [j-5, j-1]
  • the time indication information includes the time end point (#j-1), and the time length and reception time of the time range configured by the access network device for the terminal
  • the number of bits of the state is associated, and the length of time is determined from the end of time (#j-1) to determine three time units for uplink data transmission, respectively, time unit (#j-1), time unit (#j-3) and time unit (#j-5), the time range of the time range is 5 time units.
  • the time start or the time end corresponding to the time range indicated by the time indication information is predefined, and the time length of the time range is associated with the number of bits corresponding to the receiving status of the n HARQ processes.
  • the feedback information sent by the access network device in the first time unit may include only the receiving state of the n HARQ processes, and the n time units corresponding to the receiving states of the n HARQ processes.
  • the length of time of the time range is associated with the number of bits used to indicate the receiving status of the n HARQ processes. It can be understood that, at this time, the time range indicated by the time indication information is determined by a predefined time start or time terminal and The length of the implicit association is determined by the length of time.
  • the feedback information of the first time unit includes the receiving status without including the explicit time indication information, or it can be understood that the time indication information shares the control field included in the feedback information with the receiving status of the n HARQ processes.
  • the control field consists of one or more bits. Assuming that the feedback information included in the first time unit includes X bits, the specific value of each bit of the X bits may indicate the receiving state of the corresponding HARQ process, and the number of X bits, that is, X may represent the X bits. The length of time in the time range in which the HARQ process corresponds to the bit.
  • both the time start point and the time end point are represented by the first time unit as a reference time unit, and may be represented by the sequence order of the corresponding time unit in actual implementation.
  • the second time unit, the fifth time unit, and the like the present embodiment does not limit the representation of the time start point and the time end point.
  • the length of time is represented by the number of time units.
  • the length of time may also be represented by a duration, such as 1 ms, 2 ms, or the like.
  • the time start of the time range may be the start boundary of a certain time unit included in the time range
  • the time end point of the time range may be the end boundary of a certain time unit included in the time range.
  • the time start or the time end point described as the time range may be simplified as a certain time unit included in the time range.
  • the following two descriptions are equivalent.
  • a description is that the time start of the time range is the start boundary of the time unit that is the earliest in time, and the time end of the time range is the end boundary of the time unit that is the latest in the time range.
  • Another equivalent description is that the time start of the time range is the time unit that is the earliest in time, and the time end of the time range is the time unit that is the latest in the time range.
  • each representation form of the foregoing time indication information it is required to ensure that the number of bits of the receiving state in the second feedback information is associated with the length of time of the time range indicated by the time indication information.
  • the number of bits of the receiving state in the second feedback information is associated with the time length of the time range indicated by the time indication information, so that the terminal can directly determine the correspondence between the receiving state and the time unit, thereby saving the access network device. Signaling overhead.
  • the number of bits of the receiving state in the second feedback information may not be associated with the time length of the time range indicated by the time indication information.
  • the number of bits in the receiving state in the second feedback information is 5 bits.
  • the time range indicated by the time indication information includes 7 time units for uplink data transmission.
  • the terminal cannot directly determine the correspondence between the 7 time units and the 5 bit receiving state, and the access network device needs to send additional signaling to the terminal to notify the terminal to determine the correspondence between the time unit and the receiving state.
  • the manner of the relationship; or, by a preset rule the manner in which the terminal can determine the correspondence between the time unit and the reception state time.
  • the preset rule may be that the receiving state in the second feedback information corresponds to a time unit in the time domain position included in the time range indicated by the time indication information, for example, in this example, 5 bits respectively correspond to Time units numbered 1-5.
  • the time start of the time range is the earliest time unit in the time domain among the n time units, for example, in FIG. 4H, the time start of the time range is the time unit (#j-5). . In this way, the signaling overhead of the access network device is saved.
  • the time end point is the latest time unit in the time domain among the n time units.
  • the time end of the time range is the time unit (#j-1). In this way, the signaling overhead of the access network device is saved.
  • the time length is n The length of time between the earliest time unit in the time domain and the latest time unit in the time domain.
  • the access network device cannot predetermine the time position at which the terminal sends the uplink data. Generally, the access network device determines whether the terminal sends uplink data by blind detection, for example, detecting whether a reference signal exists. At this time, the access network device may have a missed detection condition, that is, the terminal sends the uplink data on the pre-configured resource, but the access network device does not detect it.
  • the access network device can configure an automatic retransmission timer for the terminal through the high layer signaling, and the terminal starts the automatic retransmission timer after transmitting the uplink data. If the terminal has not received the receiving status of the uplink data when the timing of the automatic retransmission timer arrives, the terminal automatically retransmits the uplink data. In this way, the terminal does not wait for the receiving state of the uplink data, and reduces the processing delay of the uplink data.
  • the retransmission timer is used to trigger the terminal to retransmit the uplink data by using the uplink HARQ process, and the start time of the automatic retransmission timer is after the time unit corresponding to the uplink HARQ process.
  • the start time of the automatic retransmission timer is located in the k+1th time unit, that is, after the terminal sends the uplink data in the kth time unit, from the kth +1 time unit starts to start the automatic retransmission timer.
  • the automatic retransmission timer can be represented by m time units
  • the terminal does not receive the access network device for the terminal if it is not in the k+m time unit.
  • the receiving status feedback of the uplink data sent by the kth time unit the terminal may automatically retransmit the uplink data sent in the kth time unit in the k+m+1 time unit; or, the automatic retransmission timer is started.
  • the terminal can initiate an automatic retransmission timer for timing.
  • the terminal may start the automatic retransmission timer in the k+thth time unit or the k+h+1th time unit.
  • the automatic retransmission timer can be represented by m time units
  • the terminal may automatically retransmit in the kth time unit at the k+h+m+1 or at the k+h+m+2 time units The uplink data sent.
  • the feedback time delay is determined according to at least one of a transmission delay between the terminal and the access network device, a delay of the access network device demodulating the uplink data, and a delay of the access network device modulating the second feedback information.
  • the terminal can receive the receiving state corresponding to the uplink data before automatically retransmitting the uplink data, that is, The validity of the receiving state received by the terminal is ensured, or the validity of the access network device is guaranteed to be fed back.
  • the time range includes the sub-time range, and the length of the sub-time range is less than or equal to the retransmission waiting time.
  • the retransmission waiting duration includes the timing duration of the automatic retransmission timer.
  • the time start of the sub-time range is the same as the time start of the time range; and/or, the time end of the sub-time range is the same as the time end of the time range.
  • the start time of the automatic retransmission timer is located in the k+1th time unit, and each uplink HARQ process corresponds to
  • the timing of the automatic retransmission timer is equal to three time units; in this case, in order to ensure that the uplink HARQ process 0 receives the corresponding reception state before retransmitting the uplink data, the time unit of the latest feedback of the uplink HARQ process 0
  • the 4th time unit is located after the first time unit, or the 4th time unit is the first time unit.
  • the time unit of the latest feedback of the uplink HARQ process 1 is the 5th time unit, the 5th time unit is located after the first time unit, or the 5th time unit is the first time unit; the uplink HARQ process 3
  • the latest feedback time unit is the 6th time unit, the 6th time unit is located after the first time unit, or the 6th time unit is the first time unit.
  • the time range is described below based on the relationship between the sub-time range and the time range.
  • the time start of the time range is the time unit corresponding to the second HARQ process that meets the preset condition, and the time end point is the first time unit.
  • the time start of the sub-time range is the same as the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the time starting point of the time range is a time unit corresponding to the second HARQ process that meets the preset condition, and the time end point is a certain time unit before the first time unit.
  • the time start of the sub-time range is the same as the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the time range is smaller than the timing of the automatic retransmission timer corresponding to the second HARQ process that meets the preset condition.
  • the terminal may receive at least the uplink HARQ process before retransmitting the uplink data corresponding to the uplink HARQ process 0.
  • the receiving state corresponding to optionally, the terminal may also receive the receiving state corresponding to the uplink HARQ process 1 before retransmitting the uplink data corresponding to the uplink HARQ process 0.
  • the time start of the time range is the time unit before the time unit corresponding to the second HARQ process that meets the preset condition, and the time end point is the first time unit.
  • the time start of the sub-time range is different from the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the sub-time range in the time range is smaller than the timing duration of the automatic retransmission timer corresponding to the second HARQ process that meets the preset condition, and the terminal may receive at least the uplink before retransmitting the uplink data corresponding to the uplink HARQ process 0.
  • the terminal may also receive the receiving state corresponding to the uplink HARQ processes 1 and 2 before retransmitting the uplink data corresponding to the uplink HARQ process 0.
  • the time start of the time range is the time unit before the time unit corresponding to the second HARQ process that meets the preset condition, and the time end point is the time unit before the first time unit.
  • the time start of the sub-time range is different from the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the sub-time range in the time range is smaller than the timing of the automatic retransmission timer corresponding to the second HARQ process that meets the preset condition.
  • the terminal may retransmit at least the uplink data corresponding to the uplink HARQ process 0.
  • the receiving state corresponding to the uplink HARQ process 0 is received.
  • the terminal may further receive the receiving state corresponding to the uplink HARQ process 1 before retransmitting the uplink data corresponding to the uplink HARQ process 0.
  • the terminal waits for one time unit, and then starts the uplink HARQ process with the HARQ process number 0.
  • the corresponding automatic retransmission timer that is, the start time of the automatic retransmission timer is located in the third time unit, and the timing of the automatic retransmission timer corresponding to the uplink HARQ process is equal to three time units;
  • the time unit of the latest feedback of the uplink HARQ process with the HARQ process number 0 is the fifth time unit, the fifth time.
  • the time unit is located after the first time unit, or the fifth time unit is the first time unit.
  • the time unit of the latest feedback of the uplink HARQ process with the HARQ process number 1 is the sixth time unit, the sixth time unit is located after the first time unit, or the sixth time unit is the first time unit.
  • the time unit of the latest feedback of the uplink HARQ process with the HARQ process number 2 is the 7th time unit, the 7th time unit is located after the first time unit, or the 7th time unit is the first time unit.
  • FIG. 4K to FIG. 4N the relationship between the length of the time range and the timing of the automatic retransmission timer is shown in FIG. 4K to FIG. 4N.
  • the start timing of the automatic retransmission timer in FIG. 4K to FIG. 4N is backward. Move a time unit.
  • the preset condition is at least one of the following conditions:
  • the corresponding time unit is a second HARQ process of the earliest time unit in the time domain among the n time units;
  • the second HARQ process with the shortest duration of the corresponding automatic retransmission timer
  • the timing of the corresponding automatic retransmission timer is greater than the second HARQ process of the preset length.
  • the corresponding time unit is the first of the n time units in the time domain.
  • the second HARQ process is a second HARQ process that satisfies a preset condition. Since the access information of the n second HARQ processes is included in the second feedback information sent by the access network device in the first time unit, the time position of the first time unit in time is ensured in order to ensure the validity of the feedback receiving state. No later than the earliest time unit of the n automatic retransmission time units corresponding to the n second HARQ processes.
  • the second HARQ process that meets the preset condition is the second HARQ process corresponding to the earliest time unit in the time domain in the n time units, because the timings of the automatic retransmission timers corresponding to the respective uplink HARQ processes are equal. .
  • the second HARQ process that retransmits the uplink data in the n second HARQ processes is the second HARQ that meets the preset condition, when the timings of the automatic retransmission timers of the respective uplink HARQ processes are not equal. process.
  • the second HARQ process that transmits the uplink data at the earliest is the second HARQ process that automatically retransmits the uplink data in the first time after experiencing the timing duration of an automatic retransmission timer in the n HARQ processes.
  • the timing of the automatic retransmission timer corresponding to the fth second HARQ processes is less than or equal to the preset length, and the value of f/n is less than the preset threshold, the terminal will In the n second HARQ processes, the second automatic HARQ process whose timing duration is greater than the preset length is determined to be the second HARQ process that meets the preset condition.
  • the n HARQ processes correspond to q automatic retransmission time units, where q is less than or equal to n. If the corresponding automatic retransmission time unit is different after each HARQ process in the n HARQ processes experiences the timing of the corresponding automatic retransmission timer, q is equal to n; or, if n HARQ processes are in the process After there are at least two HARQ processes experiencing the timing duration of the respective automatic retransmission timers, the corresponding automatic retransmission time units are the same, then q is less than n.
  • the first time unit is located before the preset time unit in the time domain; or the first time unit is the preset time unit.
  • the position of the preset time unit in the time domain satisfies the following feature: the automatic retransmission time unit corresponding to the e HARQ processes in the n HARQ processes precedes the preset time unit.
  • the ratio of e/n is pre-configured; or, e is pre-configured.
  • the automatic retransmission time unit is a time unit corresponding to the timing duration after an automatic retransmission timer is passed after the terminal transmits data through one HARQ process.
  • the automatic retransmission time unit with the HARQ process number of 0 is the fifth time unit.
  • the time resource distribution used in the time may be pre-configured, for example, may occur periodically. If the period is not equal to 1, the time unit in which the terminal performs uplink data transmission based on the UL grant free is discontinuous.
  • the time indication information may correspond to a continuous time range, and the terminal may include the UL grant in the time range.
  • the HARQ process corresponding to the time unit of the free uplink data transmission corresponds to the reception state in the feedback information of the access network device.
  • the time length of the time unit on the terminal side may be the same as or different from the time length of the time unit on the access network device side. If not, the terminal can understand the time range indicated by the time indication information in the second feedback information according to the length of the local time unit.
  • the uplink HARQ process that has received the received status to the terminal if the access network device feeds back the receiving state corresponding to the uplink HARQ process, determine the current feedback to the next time. Between the feedback, the terminal continues to use the uplink HARQ process to transmit the uplink data, and the access network device may set the receiving state corresponding to the uplink HARQ process to the default receiving state after the feedback state corresponding to the uplink HARQ process is fed back. For example: NACK.
  • the access network device determines the receiving state corresponding to the uplink HARQ process next time, and determines that the receiving state corresponding to the uplink HARQ process is the acknowledgment receiving state ACK, the default receiving state corresponding to the uplink HARQ process is NACK modification (replacement) ) is ACK.
  • the access network device sets the receiving state corresponding to the uplink HARQ process to the default receiving state, so that the packet loss situation can be avoided.
  • FIG. 5 there is shown a schematic diagram of an access network device feeding back a default reception state. It is assumed that the terminal transmits the first uplink data 502 in the first time unit 501 through the uplink HARQ process corresponding to the HPN #2, and receives the feedback information 504 sent by the access network device in the third time unit 503, the feedback information 504 indicating the The receiving status corresponding to an uplink data 502 is ACK.
  • the terminal After receiving the feedback information 504, the terminal continues to transmit the second uplink data 506 through the uplink HARQ process corresponding to HPN#2 in the fifth time unit 505.
  • the terminal receives the feedback information 507 sent by the access network device in the seventh time unit 508, and the feedback information 507 indicates the receiving status corresponding to the second uplink data 506.
  • the access network device does not set the reception status corresponding to HPN#2 to NACK after transmitting the feedback information 504. At this time, if the access network device leaks the second uplink data 506 (ie, the second uplink data 506 is not detected), the reception status corresponding to the HPN #2 indicated by the feedback information 507 is still ACK. In this case, the terminal may mistakenly think that the second uplink data 506 is correctly received by the access network device, so that the second uplink data 506 is lost, that is, the packet loss situation of the uplink service occurs.
  • the access state corresponding to the HPN #2 is set to NACK.
  • the access network device leaks the second uplink data 506, the reception status corresponding to the HPN #2 indicated by the feedback information 507 is NACK.
  • the terminal determines that the second uplink data 506 is not correctly received by the access network device, so that the second uplink data 506 is retransmitted, thereby avoiding the packet loss situation of the uplink service.
  • the access network device correctly receives the second uplink data 506, the NACK is modified to ACK, and the feedback information 507 is sent to the terminal on the seventh time unit 508, and the feedback information 507 is used.
  • the receiving state indicating that the second uplink data 506 is ACK correspondingly, the terminal receives the feedback information 507 on the seventh time unit 508.
  • the third time unit 503 can be regarded as the time unit in which "this feedback” is located, and the seventh time unit 508 can be regarded as the time unit in which "next feedback” is located.
  • the uplink HARQ process that has received the received status to the terminal if the access network device feeds back the receiving state corresponding to the uplink HARQ process, determine the current feedback to the next time. Between the feedback, the terminal does not use the uplink HARQ process to transmit uplink data, and the access network device may repeatedly transmit the receiving state corresponding to the uplink HARQ process.
  • FIG. 6 there is shown a schematic diagram of a receiving state in which an access network device repeatedly transmits an uplink HARQ process. It is assumed that the terminal transmits the first uplink data 602 in the first time unit 601 through the uplink HARQ process corresponding to the HPN #2, and the third time unit 603 receives the feedback information 604 sent by the access network device, the feedback information 604 indicating the first The receiving status of an uplink data 602 is ACK.
  • the time units included from the third time unit 603 to the fifth time unit 605 are all downlink time units (time units for downlink data transmission). If the access network device still feeds back the reception status corresponding to HPN#2 in the fifth time unit 605, the feedback information 606 sent by the access network device in the fifth time unit indicates that the reception status corresponding to HPN#2 is ACK. .
  • the access network device can continue to repeat feedback on the reception status of HPN#2 without considering the reception corresponding to HPN#2 after the feedback of the third time unit 603
  • the status changes to the default receiving status. This can improve the reliability of feedback information transmission.
  • the manner in which the access network device determines whether the terminal uses the uplink HARQ process corresponding to the received state of the current feedback to continue to transmit the uplink data is not limited in this embodiment.
  • the access network device determines whether the terminal continues to transmit uplink data by using an uplink HARQ process corresponding to the received state of the current feedback according to the number of uplink data to be transmitted. Alternatively, if the access network device determines that there is no uplink time unit for the terminal device to transmit uplink data between the time unit corresponding to the current feedback receiving state and the time unit corresponding to the next feedback receiving state, the access network device may Determining that the terminal does not use the uplink HARQ process corresponding to the received state of the feedback to continue to transmit uplink data between the time units corresponding to the two feedback receiving states; conversely, if the access network device determines that the feedback receiving state corresponds to the current feedback state Between the time unit and the time unit corresponding to the next feedback receiving state, there is an uplink time unit for the terminal device to transmit the uplink data.
  • the access network device can determine that the terminal is in the time unit corresponding to the two feedback receiving states. In the meantime, it is possible to continue to transmit uplink data by using the uplink HARQ process corresponding to the reception status of this feedback. Or, if the data transmitted by the uplink HARQ process corresponding to the received state of the current feedback is scheduled based on the access network device, the access network device may determine that the time unit range of the uplink HARQ process is continuously scheduled twice. The terminal does not continue to transmit uplink data by using the uplink HARQ process corresponding to the received state of the feedback.
  • the first feedback information is used to schedule, in addition to the first uplink data corresponding to the first HARQ process, the m second HARQ processes in the n second HARQ processes to send uplink data, 1 ⁇ m ⁇ n, m is an integer.
  • the first feedback information is further used by the scheduling terminal to retransmit the corresponding other uplink data by using the s second HARQ processes.
  • the access network device determines that the receiving state of the s second HARQ processes is a non-acknowledgment receiving state NACK, and passes the first feedback information. Indicates the resources required to retransmit the corresponding other uplink data.
  • the receiving state of the s second HARQ processes is a valid NACK.
  • the valid NACK is: when the default receiving state is NACK, the NACK except the default receiving state NACK, that is, the access network device is set when the processing time delay is too late to process part of the second HARQ process.
  • These second HARQ processes correspond to NACKs.
  • the NACK corresponding to HPN #6 and HPN #7 is not a valid NACK, that is, the first feedback information is not used to schedule other uplink data corresponding to HPN #6 and HPN #7.
  • the first feedback information is used for the scheduling terminal to retransmit the corresponding other uplink data by using the s second HARQ processes, and is used for scheduling the terminal to pass the ms second HARQ process. Pass the corresponding other uplink data.
  • the access network device determines that the receiving state of the s second HARQ processes is a non-acknowledgment receiving state NACK, and passes the first feedback information. Determining resources required for retransmitting the corresponding other uplink data; determining that the receiving state of the ms second HARQ processes is an acknowledgment receiving state ACK, and indicating, by using the first feedback information, resources required for initial transmission of other uplink data.
  • HPN#0, HPN#2-HPN#5 are the process numbers corresponding to the second HARQ process, and the access network device determines that the receiving status of other uplink data corresponding to HPN#0 is the acknowledged receiving status ACK.
  • the receiving state of the other uplink data corresponding to HPN#2-HPN#5 is the non-acknowledgment receiving state NACK, and the first feedback information is used for scheduling the terminal to retransmit other uplink data corresponding to HPN#2-HPN#5;
  • the scheduling terminal first transmits other uplink data corresponding to HPN#0.
  • the first feedback information is used to schedule other uplink data corresponding to the terminal to be initially transmitted through the m-s second HARQ processes.
  • the access network device determines that the receiving status of the ms second HARQ processes is the acknowledged receiving status ACK, and indicates by using the first feedback information.
  • HPN#0, HPN#2-HPN#5 are the process numbers corresponding to the second HARQ process, and the access network device determines that the receiving status of other uplink data corresponding to HPN#0 is the acknowledged receiving status ACK. Then, the first feedback information is used to schedule other uplink data corresponding to the initial transmission of HPN#0 by the terminal.
  • the first feedback information when the value of m is less than n, the first feedback information does not include scheduling information corresponding to all uplink HARQ processes in the second feedback information.
  • the feedback information is composed of two parts: DCI group 1 (second feedback information) and DCI group 2 (first feedback information).
  • the DCI group 1 is used to indicate the receiving state corresponding to the n+1 uplink HARQ processes; the DCI group 2 is used to schedule the uplink data sent by the terminal through the uplink HARQ process HPN#i to the uplink HARQ process HPN#j, where the first HARQ is included.
  • the upstream data sent by the process. i and j are not equal, and i and j are integers.
  • the access network device configures the state of the first feedback information.
  • the state of the first feedback information includes: scheduling information including only the first HARQ process, and scheduling information of the at least two uplink HARQ processes (at least two uplink HARQ processes include the first HARQ process).
  • the access network device adopts a high-level configuration manner to configure the first feedback, regardless of the number of the uplink HARQ processes that the first feedback information is used.
  • the information is for the first HARQ process or for multiple uplink HARQ processes. In this case, the access network device can also configure the number of multiple uplink HARQ processes.
  • the first feedback information includes time domain resource configuration information and/or frequency domain resource configuration information.
  • the time domain resource configuration information includes at least: a size of the time domain resource and/or a location of the time domain resource.
  • the frequency domain resource configuration information includes at least: a size of the frequency domain resource and/or a location of the frequency domain resource.
  • the first feedback information may be used at least for the terminal to initially transmit the second uplink data by using the first HARQ process.
  • the first feedback information may be used by the terminal to retransmit the first uplink data by using the first HARQ process.
  • the first feedback information may further include other control information for indicating uplink scheduling transmission, such as: Modulation and Coding Scheme (MCS), Transmission Power Control (TPC), and retransmission.
  • MCS Modulation and Coding Scheme
  • TPC Transmission Power Control
  • retransmission retransmission
  • the terminal when the first feedback is used by the scheduling terminal to send the uplink data by using the first HARQ process, and the scheduling terminal sends the uplink data by using the second HARQ process, the terminal sends the frequency domain resource and the terminal of the uplink data by using the first HARQ process.
  • the frequency domain resources for transmitting uplink data by using the second HARQ process may be the same or different, and the frequency domain resources include the size of the frequency domain resources and/or the location of the frequency domain resources.
  • the frequency domain resource corresponding to the first HARQ process and the frequency domain resource corresponding to the second HARQ process are different when the frequency domain resource of the uplink data is sent by the terminal and the frequency domain resource of the second HARQ process is different.
  • the pre-configured relationship may be implemented by using Radio Resource Control (RRC) signaling, or other manners, and is not specifically limited.
  • RRC Radio Resource Control
  • the feedback information is the specific control information of the terminal, and may be scrambled by the specific C-RNTI of the terminal, where the first feedback information and the second feedback information are carried in the same downlink.
  • the access network device sends the first feedback information and the second feedback information in the feedback information through the downlink channel.
  • the downlink channel is a Physical Downlink Control Channel (PDCCH); or an Enhanced Physical Downlink Control Channel (EPDCCH); or a Physical Downlink Shared Channel (Physical Downlink Shared Channel) , PDSCH); or, is a downlink channel in the 5G system, which is not limited in this embodiment.
  • PDCH Physical Downlink Control Channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PDSCH Physical Downlink Shared Channel in the 5G system, which is not limited in this embodiment.
  • the access network device may configure whether the terminal receives the feedback information.
  • FIG. 8 is a flowchart of a feedback information transmission method provided by another exemplary embodiment of the present application, which is used in the mobile communication system shown in FIG. 1 . Prior to step 402, the method includes the following further steps.
  • Step 801 The access network device sends configuration information to the terminal.
  • the configuration information is used to indicate that the terminal receives the first feedback information and the second feedback information on the same downlink channel. That is, the access network device combines the first feedback information and the second feedback information to generate feedback information.
  • the configuration information is configured by radio resource control (RRC) signaling; or is configured by physical layer signaling; or is configured by using MAC signaling, which is not limited in this embodiment.
  • RRC radio resource control
  • step 802 the terminal receives the configuration information.
  • the terminal determines, according to the configuration information, that the feedback information is received through the downlink information.
  • the terminal when the configuration information is used to indicate that the terminal receives the first feedback information and the second feedback information on different downlink channels, the terminal respectively receives the first feedback information and the second feedback information on two independent downlink channels.
  • the feedback information transmission method provided by the embodiment sends the configuration information to the terminal through the access network device, so that the terminal determines whether the first feedback information and the second feedback in the feedback information are received through the same downlink channel.
  • the information realizes the receiving mode of the dynamic configuration feedback information of the access network device.
  • the access network device may design the same downlink channel to include both the first feedback information and the second feedback information, which may save signaling overhead;
  • the access network device may design different downlink channels to include the first feedback information and the second feedback information, respectively, so as to avoid excessive downlink channel bearer.
  • step 801 can be implemented as a method embodiment on the access network device side.
  • Step 802 can be implemented as a method on the terminal side. This embodiment is not limited.
  • the access network device may not send configuration information to the terminal.
  • the terminal implicitly determines whether the first feedback information and the second feedback information are received through one downlink channel, or the first feedback information and the second feedback information are received through two independent downlink channels.
  • the terminal determines to receive the first feedback information and the second feedback information through a downlink channel, so that the access network device does not need to send configuration information to the terminal. , saving the overhead of the downlink channel.
  • the terminal determines to receive the first feedback information and the second feedback information through two independent downlink channels.
  • the first time unit, the second time unit, and the third time unit are located.
  • the frequency band is an unlicensed frequency band
  • the first time unit and the second time unit are time units included in the uplink duration (UL duration) in one TxOP.
  • the third time unit may belong to the secondary TxOP or may not belong to the secondary TxOP, which is not limited in this embodiment.
  • the UL duration may be pre-configured, or may be dynamically notified by the access network device, or may be dynamically notified to the access network device by the terminal, which is not limited in this embodiment of the present application.
  • the UL duration is configured by the access network device by sending Radio Resource Control (RRC) signaling to the terminal.
  • RRC Radio Resource Control
  • the UL duration is configured by the access network device by transmitting a common control information indication to the terminal on a Common Physical Downlink Control Channel (C-PDCCH) on the unlicensed frequency band.
  • C-PDCCH Common Physical Downlink Control Channel
  • the terminal determines the UL duration through the common control information indication on the unlicensed band.
  • the common control information may indicate an end position of the downlink burst data transmission.
  • the UL duration notified by the C-PDCCH includes a third time unit 92 that belongs to the same TxOP 96 as the downlink TTI 94 where the C-PDCCH is located.
  • the terminal may send the uplink data to the access network device in the third time unit by using the UL grant, and may send the uplink data to the access network device in the third time unit by using the UL grant, which is not limited in this application.
  • the resources for the UL grant free transmission mentioned in the foregoing various embodiments include at least one of the following: a time resource used for uplink data transmitted based on the UL grant free, and an uplink data based on the UL grant free transmission.
  • the signature information includes at least one of the following: a codebook, a codeword, a sequence, an interleaving pattern, a mapping pattern, a Demodulation Reference Signal (DMRS), a preamble, a spatial dimension information, and a power dimension information.
  • DMRS Demodulation Reference Signal
  • the resource used for the UL grant free transmission includes any resource corresponding to the uplink data transmitted by the UL grant free, where the resource includes resources in time, resources in frequency, resources in the spatial domain, and code. Domain resources, power information, resources needed to assist in uplink data demodulation (eg, reference signals, reference signals that assist in implementing time-frequency synchronization, and preamble sequences, etc.).
  • the signature information required for retransmitting the uplink data mentioned in the foregoing various embodiments may include at least one of the following: MCS, DMRS related control information (schematically, may include cyclic shift (Cyclic Shift, CS) and Orthogonal Cover Code (OCC)), codebook, codeword, sequence, interleaving pattern, mapping pattern, Demodulation Reference Signal (DMRS), preamble, spatial dimension information , power dimension information.
  • the signature information required for retransmitting the uplink data includes any resource corresponding to the retransmission of the uplink data, where the resource includes resources in time, resources in the frequency, resources in the spatial domain, and code domain resources. Power information, and resources needed to assist in retransmission of uplink data demodulation, such as demodulation reference signals, reference signals that assist in implementing time-frequency synchronization, and one or more of the preamble sequences.
  • the uplink data sent by the terminal mentioned in each of the foregoing embodiments includes, for example, uplink data sent by the terminal in the third time unit, and the uplink data sent by the terminal in the second time unit may correspond to one transport block.
  • Transport Block, TB Transmission Block
  • CB code block
  • the reception status mentioned in the above various embodiments may include DTX in addition to ACK and/or NACK.
  • the reception status includes ACK, NACK, and DTX
  • 2 bits may be used to indicate the reception status corresponding to each HARQ process.
  • the receiving states of the n second HARQ processes mentioned in the foregoing various embodiments include: a receiving state when the terminal sends other uplink data by using the second HARQ process, and/or, the terminal does not pass the second HARQ
  • the default receiving status when the process sends other upstream data When the terminal sends other uplink data through the second HARQ process, but the data receiving processing delay and other problems, the access network device cannot feed back the receiving of other uplink data sent by the second HARQ process when sending the second feedback information.
  • the default receiving state may be used to feedback other uplink data corresponding to the second HARQ process.
  • the first feedback information and the second feedback information may be carried in a UL grant, where the UL grant is Downlink Control Information (DCI) for scheduling uplink data transmission.
  • DCI Downlink Control Information
  • the UL grant can be sent through the downlink control channel in the format of DCI format 0, DCI format 4, DCI format 0A, DCI format 0B, DCI format 4A, and DCI format 4B, or can be understood as: DCI. All downlink control information sent by the downlink control channel of the format 0, the DCI format 4, the DCI format 0A, the DCI format 0B, the DCI format 4A, and the DCI format 4B may be regarded as a UL grant.
  • the second feedback information may multiplex some redundant bits in the UL grant to indicate n second HARQ processes; or, n second HARQ processes and reception states of the first HARQ process.
  • the field information may be used to indicate the foregoing receiving state; for example, the frequency resource indicating information in the UL grant may also be used to indicate the foregoing receiving. status.
  • an extra bit may be added to the existing UL grant to indicate the n second HARQ processes, or the receiving states of the n second HARQ processes and the first HARQ process.
  • a specific one or more bits may be used in the UL grant after adding the extra bit to indicate that the UL grant after adding the extra bit is used only for scheduling uplink data (for example, It includes only the first feedback information, and is used for both scheduling uplink data and second feedback information. Further, the specific one or more bits are further used to indicate that the UL grant after adding the extra bit only includes the second feedback information.
  • the terminal detects the feedback information in the first downlink channel (for example, the feedback information is detected by using the UL grant), and further, the terminal may be configured according to the indication information included in the feedback information (for example, The status of the feedback information is determined by the indication information included in the UL grant, and the status of the feedback information includes at least one of the following: the feedback information includes the first feedback information and the second feedback information; and the feedback information includes only the first feedback information ( For example, the feedback information includes only scheduling information for uplink data transmission, and does not include a receiving state of the second HARQ process indicated by a bitmap or other form; the feedback information includes only the second feedback information (for example, only includes a bitmap or other form indication) The receiving state of the second HARQ process).
  • the feedback information includes only scheduling information for uplink data transmission, and does not include a receiving state of the second HARQ process indicated by a bitmap or other form
  • the feedback information includes only the second feedback information (for example, only includes a bitmap or other form indication) The receiving state
  • the terminal may detect feedback information in the second downlink channel (for example, detecting feedback information by using a UL grant), and further, the terminal may be configured according to the indication information included in the feedback information (for example, The status of the feedback information is determined by the indication information included in the UL grant.
  • the status of the feedback information may include: the feedback information includes the first feedback information and the second feedback information, and the feedback information includes only the first feedback information. This is especially applicable when the number of bits used by the first feedback information is large, and if the feedback information includes only the second feedback information, the number of redundant bits in the UL grant is increased.
  • the terminal may detect the control information including the second feedback information in the third downlink channel, for example, the control information includes only the receiving state of the second HARQ process indicated by a bitmap or other form, and, for example, the control The information includes not only the receiving status of the second HARQ process indicated by a bitmap or other forms, but also some other control information, such as Transmit Power Control (TPC) information, MCS information, etc., but does not include time domain resource configuration. Information and/or frequency domain resource configuration information.
  • TPC Transmit Power Control
  • MCS information Mobility Control
  • Information and/or frequency domain resource configuration information information.
  • the transmission format used by the downlink control information transmitted in the second downlink channel is different from the transmission format used by the downlink control information transmitted in the third downlink channel. That is, the terminal needs at least two blind detections to detect the feedback information carried in the second downlink channel and the control information including the second feedback information carried in the third downlink channel.
  • the above description also applies to the 5G communication system, although the DCI format carrying the uplink control information may be different from the LTE system, but is applicable to the design of the UL grant in the 5G system.
  • the access network device may only feed back the receiving state and the corresponding time indication information corresponding to the HARQ process to the terminal.
  • FIG. 9B there is shown a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application, which is used in the mobile communication system shown in FIG. 1.
  • the method includes the following steps.
  • Step 901 The terminal sends uplink data through n HARQ processes on n time units.
  • Each time unit corresponds to one HARQ process, and the terminal sends uplink data in each time unit through a corresponding HARQ process.
  • n time units are consecutive in the time domain; or, n time units are discontinuous in the time domain.
  • Step 902 The access network device receives uplink data sent by the terminal through the n HARQ processes on the n time units.
  • the n time units on the access network device side are in one-to-one correspondence with the n time units on the terminal side.
  • step 404 For the description of this step, refer to step 404, and the embodiment is not described herein.
  • Step 903 The access network device sends feedback information on the first time unit.
  • the feedback information includes a receiving state and time indication information of the n HARQ processes, where the time indication information is used to indicate a time unit corresponding to the receiving state of the n HARQ processes, and the n time units are located before the first time unit.
  • the time indication information indicates a time unit corresponding to the receiving state of each uplink HARQ process by using a display indication manner. That is, the feedback information includes information bits corresponding to the time indication information.
  • the time indication information indicates the time unit corresponding to the receiving state of each uplink HARQ process by using an implicit indication manner.
  • the information bit used to indicate the receiving state in the second feedback information may also be used. Indicates time indication information.
  • the time unit corresponding to the receiving state of each uplink HARQ process refers to a time unit for transmitting uplink data by the uplink HARQ process.
  • the feedback information includes a 3-bit receiving state, where the 3-bit receiving state is a receiving state corresponding to the uplink HARQ process with the sequence number 1 in FIG. 4H, and the time unit corresponding to the receiving state is the j-5th time unit.
  • the receiving state corresponding to the uplink HARQ process with sequence number 2 the time unit corresponding to the receiving state is the receiving state corresponding to the uplink HARQ process of the j-3th time unit and the sequence number 3, and the time unit corresponding to the receiving state is The j-1th time unit.
  • the time indication information in the feedback information indicates a time range corresponding to the n time units.
  • the first type the time indication information includes the time start and time end of the time range.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-5) time unit and (#j-1) time unit.
  • the time indication information includes the time start and length of time of the time range.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-5) time units and time lengths of 5 time units.
  • the time indication information includes the time end of the time range and the length of time.
  • the time range is [j-5, j-1]
  • the time indication information includes (#j-1) time unit and time length 5 time units.
  • the time indication information includes the length of time of the time range, and the time start or time end of the time range is pre-configured.
  • the time starting point of the access network device configuring the time range for the terminal is the pth time unit before the first time unit, and p is a positive integer.
  • the time end point of the access network device pre-configuring the time range for the terminal is the qth time unit before the first time unit, and q is a positive integer.
  • p is greater than q.
  • the time end of the time range configured by the access network device for the terminal is a time unit or a first time unit before the first time unit.
  • the time range is [j-5, j-1]
  • the time indication information includes a time length of 5 time units
  • the time end of the time range configured by the access network device for the terminal is the first time.
  • the time range is [j-5, j-1]
  • the time indication information includes the time end point (#j-1), and the time length and reception time of the time range configured by the access network device for the terminal
  • the number of bits of the state is associated, and the length of time is determined from the end of time (#j-1) to determine three time units for uplink data transmission, respectively, time unit (#j-1), time unit (#j-3) and time unit (#j-5), the time range of the time range is 5 time units.
  • both the time start point and the time end point are represented by the first time unit as a reference time unit, and may be represented by the sequence order of the corresponding time unit in actual implementation.
  • the second time unit, the fifth time unit, and the like the present embodiment does not limit the representation of the time start point and the time end point.
  • the length of time is represented by the number of time units.
  • the length of time may also be represented by a duration, such as 1 ms, 2 ms, or the like.
  • the time start of the time range may be the start boundary of a certain time unit included in the time range
  • the time end point of the time range may be the end boundary of a certain time unit included in the time range.
  • the time start or the time end point described as the time range may be simplified as a certain time unit included in the time range.
  • the following two descriptions are equivalent.
  • a description is that the time start of the time range is the start boundary of the time unit that is the earliest in time, and the time end of the time range is the end boundary of the time unit that is the latest in the time range.
  • time start of the time range is the time unit that is the earliest in time
  • time end of the time range is the time unit that is the latest in the time range.
  • the above equivalent description also applies to the case where the time start and time end of the time range are other time units included in the time range.
  • each representation form of the foregoing time indication information it is required to ensure that the number of bits of the reception status in the feedback information is associated with the time length of the time range indicated by the time indication information.
  • the number of bits of the receiving state in the second feedback information is associated with the time length of the time range indicated by the time indication information, so that the terminal can directly determine the correspondence between the receiving state and the time unit, thereby saving the access network device. Signaling overhead.
  • the number of bits of the receiving state in the feedback information may not be associated with the time length of the time range indicated by the time indication information.
  • the number of bits of the receiving state in the second feedback information is 5 bits, and time The time range indicated by the indication information includes 7 time units for uplink data transmission.
  • the terminal cannot directly determine the correspondence between the 7 time units and the 5 bit receiving state, and the access network device needs to send additional signaling to the terminal to notify the terminal to determine the correspondence between the time unit and the receiving state.
  • the manner of the relationship; or, by a preset rule the manner in which the terminal can determine the correspondence between the time unit and the reception state time.
  • the preset rule may be a time unit in the time range indicated by the receiving state corresponding to the time indication information in the two feedback information, for example, in the example, the 5 bit corresponding label is Time unit of 1-5.
  • the time start of the time range is the earliest time unit in the time domain among the n time units, for example, in FIG. 4H, the time start of the time range is the time unit (#j-5). .
  • the terminal does not need to detect whether the time unit before the start of the time is a time unit for uplink data transmission, which saves resources of the terminal.
  • the time end of the time range is the latest time unit in the time domain of the n time units.
  • the time end of the time range is the time unit (#j-1).
  • the terminal does not need to detect whether the time unit after the time end point is a time unit for uplink data transmission, which saves resources of the terminal.
  • the time length is n The length of time between the earliest time unit in the time domain and the latest time unit in the time domain.
  • the terminal can ensure that the terminal can automatically retransmit the uplink data before Receiving the receiving state corresponding to the uplink data, that is, ensuring the validity of the receiving state received by the terminal.
  • the time range includes a sub-time range, and the length of the sub-time range is less than or equal to the retransmission waiting time, and
  • the transmission waiting duration includes the timing duration of the automatic retransmission timer.
  • the time start of the sub-time range is a time unit corresponding to the HARQ process that meets the preset condition in the n HARQ processes, and the time end point of the sub-time range is the time unit before the first time unit or the first time unit.
  • the HARQ process that satisfies the preset condition refers to the HARQ process that is the oldest automatic retransmission in the time domain in the n HARQ processes.
  • the time start of the sub-time range in the time range is the time unit corresponding to the HARQ process that meets the preset condition, and the time length of the sub-time range is less than the time duration of the automatic retransmission timer corresponding to the HARQ process that meets the preset condition. In this way, it is ensured that the receiving state of the uplink data is received before the terminal automatically retransmits the uplink data corresponding to the HARQ process that meets the preset condition, and the validity of the receiving state is ensured.
  • the time range is described below based on the relationship between the sub-time range and the time range.
  • the time starting point of the time range is the time unit corresponding to the HARQ process that meets the preset condition, and the time end point is the first time unit.
  • the time start of the sub-time range is the same as the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the time starting point of the time range is the time unit corresponding to the HARQ process that meets the preset condition, and the time end point is a certain time unit before the first time unit.
  • the time start of the sub-time range is the same as the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the time starting point of the time range is the time unit before the time unit corresponding to the HARQ process that meets the preset condition, and the time end point is the first time unit.
  • the time start of the sub-time range is different from the time start of the time range, and the time end of the sub-time range is the same as or different from the time end of the time range.
  • the preset condition is at least one of the following conditions: the corresponding time unit is a HARQ process of the earliest time unit in the time domain among the n time units; the corresponding automatic retransmission timer The HARQ process with the shortest duration; the timing of the corresponding automatic retransmission timer is greater than the preset length of the HARQ process.
  • the terminal time is the HARQ of the earliest time unit in the time domain in the n time units.
  • the process determines the HARQ process as a preset condition.
  • the terminal determines that the HARQ process with the shortest duration of the corresponding automatic retransmission timer determines that the HARQ process with the shortest duration of the corresponding automatic retransmission timer is the preset in the n HARQ processes, when the timings of the automatic retransmission timers of the respective uplink HARQ processes are not equal.
  • Conditional HARQ process when the timings of the automatic retransmission timers of the respective uplink HARQ processes are not equal.
  • the timing of the automatic retransmission timer corresponding to the f HARQ processes is less than or equal to the preset length, and the value of the f/n is less than the preset threshold, the terminal will be n HARQ processes.
  • the HARQ process in which the timing of the corresponding automatic retransmission timer is greater than the preset length is determined to be a HARQ process that meets the preset condition.
  • step 904 the terminal receives the feedback information on the first time unit.
  • the present embodiment carries the receiving state and the time indication information of the n HARQ processes in the feedback information, so that the terminal can determine the HARQ process corresponding to the receiving state according to the time indication information, and does not need to send an additional network device.
  • the signaling notifies the terminal to receive the correspondence between the state and the HARQ process, which saves the signaling overhead of the access network device.
  • the feedback information generated by the access network device includes a receiving state corresponding to the n HARQ processes.
  • the present application provides a bitmap indication and a time unit indication to determine the correspondence between the receiving state and the HARQ process.
  • the manner of determining the correspondence between the receiving state and the HARQ process is not limited to the two modes provided by the present application. It is only necessary to ensure that the length of time between the time unit corresponding to the HARQ process and the first time unit in the n HARQ processes is less than or equal to the retransmission waiting time.
  • FIG. 9C there is shown a flowchart of a feedback information transmission method provided by an exemplary embodiment of the present application, which is used in the mobile communication system shown in FIG. 1.
  • the method includes the following steps.
  • Step 910 The terminal sends uplink data through n HARQ processes on n time units, where n is a positive integer.
  • Step 920 The access network device receives the uplink data sent by the terminal through the n HARQ processes on the n time units.
  • step 902. This embodiment is not described here.
  • step 930 the access network device sends feedback information on the first time unit.
  • n time units are located before the first time unit.
  • the feedback information includes the reception status of n HARQ processes.
  • the length of time between the time unit corresponding to the HARQ process and the first time unit in the n HARQ processes is less than or equal to the retransmission waiting time, and the retransmission waiting time includes the time duration of the automatic retransmission timer.
  • the transmission timer is used to trigger the terminal to retransmit the uplink data that is sent by the HARQ process that meets the preset condition.
  • the startup time of the automatic retransmission timer is after the time unit corresponding to the HARQ process that meets the preset condition.
  • step 903. This embodiment is not described here.
  • step 940 the terminal receives the feedback information on the first time unit.
  • step 904. This embodiment is not described herein.
  • the feedback information transmission method provided in this embodiment is configured to set the length of time between the time unit corresponding to the HARQ process that meets the preset condition in the n HARQ processes and the first time unit is less than or equal to the retransmission waiting time. The validity of the receiving status fed back by the access network device is guaranteed.
  • FIG. 10 is a block diagram of a feedback information transmission apparatus provided by an embodiment of the present application.
  • the feedback information transmission device can be implemented as all or part of the terminal 140 or the access network device 120 in the mobile communication system shown in FIG. 1 by software, hardware or a combination of both.
  • This embodiment is described by taking the terminal 140 as the UE in the LTE system or the 5G system as an example.
  • the access network device 120 is an eNB in the LTE system, or the gNB in the 5G system is taken as an example for description.
  • the feedback information receiving apparatus may include: a transmitting unit 1010 and a receiving unit 1030.
  • the sending unit 1010 is configured to implement the foregoing steps 403, 405, 901, and 910 and the terminal side transmitting function implied in each step.
  • the receiving unit 1020 is configured to implement the functions of the foregoing steps 402, 802, 904, and 940 and the receiving function of the terminal side implied in each step.
  • the receiving unit 1020 can be implemented by a receiver in the terminal; the transmitting unit 1010 can be implemented by a transmitter in the terminal.
  • the feedback information transmission device is implemented as the access network device 120 in the mobile communication system.
  • the sending unit 1010 is configured to implement the foregoing steps 401, 801, 903, and 930 and the sending function of the access network device side implied in each step.
  • the receiving unit 1020 is configured to implement the functions of the foregoing steps 404, 406, 902, and 920 and the receiving function of the access network device side implied in each step.
  • the receiving unit 1020 can be implemented by a receiver in the access network device; the transmitting unit 1010 can be implemented by a transmitter in the access network device.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit may be only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne le domaine des communications, et concerne un procédé de réception et un procédé de transmission d'informations de rétroaction, un appareil et un système. Le procédé comprend les étapes suivantes : un terminal reçoit des informations de rétroaction dans une première unité de temps, les informations de rétroaction comprenant des premières informations de rétroaction et des secondes informations de rétroaction transmises sur le même canal de liaison descendante ; et le terminal transmet, selon les premières informations de rétroaction, des données de liaison montante dans une seconde unité de temps par l'intermédiaire d'un premier processus HARQ, les secondes informations de rétroaction indiquant un état de réception de n seconds processus HARQ, et le second processus HARQ est un processus HARQ du terminal. La présente invention résout un problème dans lequel un mécanisme de rétroaction HARQ dans un système LTE courant n'est pas approprié en tant que mécanisme de rétroaction pour une transmission sans autorisation UL ; et permet que, lors de la réception d'informations de rétroaction, un terminal peut obtenir un état de réception correspondant à d'autres données de liaison montante, et obtenir également une ressource requise pour une retransmission de premières données de liaison montante ou une première transmission de secondes données de liaison montante.
PCT/CN2018/082383 2017-04-18 2018-04-09 Procédé de réception et procédé de transmission d'informations de rétroaction, appareil et système WO2018192383A1 (fr)

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CN201710807400.7 2017-09-08
CN201710807400.7A CN108737036B (zh) 2017-04-18 2017-09-08 反馈信息接收方法、发送方法、装置及系统

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101192896A (zh) * 2006-11-20 2008-06-04 大唐移动通信设备有限公司 错误指示的处理方法、发送端设备、接收端设备及系统
US20130242889A1 (en) * 2012-03-16 2013-09-19 Alexey Khoryaev Physical uplink shared channel (pusch) transmission time interval (tti) bundling
CN106330410A (zh) * 2015-06-16 2017-01-11 中国移动通信集团公司 一种上行信息的处理方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101192896A (zh) * 2006-11-20 2008-06-04 大唐移动通信设备有限公司 错误指示的处理方法、发送端设备、接收端设备及系统
US20130242889A1 (en) * 2012-03-16 2013-09-19 Alexey Khoryaev Physical uplink shared channel (pusch) transmission time interval (tti) bundling
CN106330410A (zh) * 2015-06-16 2017-01-11 中国移动通信集团公司 一种上行信息的处理方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "HARQ Feedback Transmission Schemes for NR", 3GPP TSG-RAN WG2 #97 R2-1700847, 17 February 2017 (2017-02-17), XP051211628 *
NOKIA NETWORKS: "HARQ ACK/NACK for PUSCH", 3GPP TSG-RAN WG1 MEETING #82 RL-153831, 28 August 2015 (2015-08-28), XP051001270 *

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