WO2018195707A1 - Procédé et dispositif de rétroaction de harq de liaison descendante, terminal et station de base - Google Patents

Procédé et dispositif de rétroaction de harq de liaison descendante, terminal et station de base Download PDF

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Publication number
WO2018195707A1
WO2018195707A1 PCT/CN2017/081663 CN2017081663W WO2018195707A1 WO 2018195707 A1 WO2018195707 A1 WO 2018195707A1 CN 2017081663 W CN2017081663 W CN 2017081663W WO 2018195707 A1 WO2018195707 A1 WO 2018195707A1
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WO
WIPO (PCT)
Prior art keywords
terminal
base station
feedback
downlink
capability information
Prior art date
Application number
PCT/CN2017/081663
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English (en)
Chinese (zh)
Inventor
刘洋
Original Assignee
北京小米移动软件有限公司
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Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2017/081663 priority Critical patent/WO2018195707A1/fr
Priority to CN201780000250.7A priority patent/CN109121464B/zh
Publication of WO2018195707A1 publication Critical patent/WO2018195707A1/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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H04L1/0073—Special arrangements for feedback channel
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1806—Go-back-N protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows

Definitions

  • the present disclosure relates to the field of communications, and in particular, to a downlink HARQ feedback method and apparatus, a terminal, and a base station.
  • a PHH channel Physical Hybrid ARQ Indicator Channel
  • LTE Long Term Evolution
  • the scheduling unit can adopt different units according to the capabilities of the terminal. Therefore, the downlink HARQ feedback method in the related art cannot be better applied to the 5G system.
  • the present disclosure provides a downlink HARQ feedback method and apparatus to solve the deficiencies in the related art.
  • a downlink HARQ feedback method is provided, where the method is used in a terminal, including:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low latency service, and used to indicate that the terminal requests the base station to configure itself to correspond to the The second terminal capability information of the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, An independent downlink feedback channel configured by the terminal;
  • the HARQ result of the downlink data is fed back to the base station by using the downlink feedback channel configured by the base station for itself.
  • the sending terminal capability information to the base station includes:
  • the requesting and transmitting terminal capability information is transmitted to the base station through the radio resource control connection establishment.
  • the returning the HARQ result of the downlink data to the base station by using the downlink feedback channel that is configured by the base station including:
  • the HARQ result of the downlink data is fed back to the base station in a time domain position corresponding to the feedback delay in units of the target scheduling unit.
  • it also includes:
  • the HARQ result indicating that the PHICH channel feeds back downlink data to the base station is automatically retransmitted by physical hybrid.
  • a downlink HARQ feedback method is provided, where the method is used in a base station, and the method includes:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low-latency service, and used to identify that the terminal requests the base station to configure the corresponding The second terminal capability information of the target feedback type of the low latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, and uses the base station as the location An independent downlink feedback channel configured by the terminal;
  • it also includes:
  • the configuring the downlink feedback channel for the terminal includes:
  • the target scheduling unit is a time domain unit used by the terminal to feed back the HARQ result of the downlink data to the base station;
  • a downlink HARQ feedback apparatus the apparatus being used for a terminal, the apparatus comprising:
  • a first sending module configured to send terminal capability information to the base station, where the terminal capability information includes: first terminal capability information used to represent that the terminal supports low-latency service, and used to represent the terminal request
  • the base station configures, by itself, second terminal capability information corresponding to the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station.
  • the independent downlink feedback channel configured by the base station for the terminal;
  • a first receiving module configured to receive a feedback type that is returned by the base station and configured for the terminal
  • the first feedback module is configured to: when the feedback type is consistent with the target feedback type, feed back, by the base station, the HARQ result of the downlink data to the base station by using the downlink feedback channel configured by the base station.
  • the first sending module includes:
  • the sending submodule is configured to establish a request to send terminal capability information to the base station through the RRC connection.
  • the first feedback module includes:
  • Obtaining a submodule configured to acquire, by the base station, based on the terminal capability information a target scheduling unit, where the target scheduling unit is a time domain unit used by the terminal to feed back HARQ results of downlink data to the base station;
  • a first determining submodule configured to determine a feedback delay of the HARQ result of the feedback downlink data, where the feedback delay is in units of the target scheduling unit;
  • a feedback sub-module configured to: in the downlink feedback channel configured by the base station, feed back downlink data to the base station in a time domain location corresponding to the feedback delay in units of the target scheduling unit HARQ results.
  • it also includes:
  • the second feedback module is configured to: when the feedback type is inconsistent with the target feedback type, automatically retransmit the HARQ result indicating that the PHICH channel feeds back downlink data to the base station by using physical hybrid.
  • a downlink HARQ feedback apparatus where the apparatus is used in a base station, and the apparatus includes:
  • the second receiving module is configured to receive the terminal capability information sent by the terminal, where the terminal capability information includes: first terminal capability information used to represent the terminal to support the low latency service, and used to represent the terminal requesting location
  • the base station configures, by itself, second terminal capability information corresponding to the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the downlink automatic data retransmission request HARQ result to the base station.
  • the independent downlink feedback channel configured by the base station for the terminal is used;
  • a feedback type configuration module configured to configure a feedback type for the terminal based on the terminal capability parameter
  • the second sending module is configured to send the feedback type to the terminal.
  • it also includes:
  • the feedback channel configuration module is configured to configure the downlink feedback channel for the terminal when the feedback type is consistent with the target feedback type.
  • the feedback channel configuration module includes:
  • a second determining submodule configured to determine a target scheduling list based on the terminal capability information Bit, the target scheduling unit is a time domain unit used when the terminal feeds back the HARQ result of the downlink data to the base station;
  • a feedback channel configuration sub-module configured to configure, for the terminal, a downlink feedback channel corresponding to at least one bit of each target scheduling unit, where the downlink feedback channel is used only for the terminal to feed back downlink data HARQ to the base station result.
  • a terminal including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low latency service, and used to indicate that the terminal requests the base station to configure itself to correspond to the The second terminal capability information of the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, An independent downlink feedback channel configured by the terminal;
  • the HARQ result of the downlink data is fed back to the base station by using the downlink feedback channel configured by the base station for itself.
  • a base station including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low-latency service, and used to identify that the terminal requests the base station to configure the corresponding The second terminal capability information of the target feedback type of the low latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, and uses the base station as the location Independent of the terminal configuration Downlink feedback channel;
  • the terminal may send its own terminal capability information to the base station, and the base station configures a feedback type for the terminal based on the terminal capability information. If the feedback type configured by the base station for the terminal is consistent with the target feedback type of the low-latency service requested by the terminal, the terminal may feed back to the base station by using the independent downlink feedback channel configured by the base station for itself. HARQ results of downlink data. Through the above process, the terminal quickly performs HARQ result feedback of downlink data by using an independent downlink feedback channel corresponding to the low-latency service, and implements low-latency synchronous feedback, which satisfies the low-latency service requirement in the 5G system.
  • the terminal when the terminal feeds back the HARQ result of the downlink data through the downlink feedback channel, the terminal may obtain the target scheduling unit determined by the base station based on the terminal capability information, where the target scheduling unit is the terminal to the base station.
  • the time domain unit used to feed back the HARQ results of the downlink data.
  • a feedback delay of the HARQ result of the feedback downlink data is determined, and the feedback delay is in units of the target scheduling unit.
  • the HARQ result of the downlink data is fed back to the base station in the time domain position corresponding to the feedback delay in the target scheduling unit.
  • the target scheduling unit is determined according to the terminal capability information, and the terminal capability information indicates that the terminal supports the low-latency service. Therefore, the target scheduling unit may be smaller, and the terminal may quickly downlink through the downlink feedback channel. Feedback of HARQ results of the data.
  • the terminal may feed back the HARQ result of the downlink data to the base station by using the PHICH channel.
  • the base station may be based on the terminal capability information sent by the terminal.
  • the end configures a feedback type and sends the feedback type to the terminal.
  • the terminal selects an appropriate channel according to the feedback type configured by the base station to perform HARQ result feedback of the downlink data.
  • the above downlink HARQ feedback process can be applied to a 5G system, and the scheduling unit can be no longer limited to a subframe.
  • the base station when configuring a separate downlink feedback channel for the terminal, may first determine a target scheduling unit based on the terminal capability information, where the target scheduling unit is used when the terminal feeds back the HARQ result of the downlink data to the base station. Time domain unit. Further, a downlink feedback channel corresponding to at least one bit of each target scheduling unit is configured for the terminal, and the downlink feedback channel is used only for the terminal to feed back the HARQ result of the downlink data to the base station.
  • the downlink feedback channel configured for the terminal performs the HARQ result feedback of the downlink data by using at least one bit for each target scheduling unit, and the downlink feedback channel is only used for performing HARQ result feedback of the downlink data, thereby being fast.
  • the HARQ result of the downlink data is fed back to the base station to implement low-latency synchronous feedback, which satisfies the low-latency service requirement in the 5G system.
  • FIG. 1 is a schematic diagram of a downlink HARQ result feedback scenario according to an exemplary embodiment of the present disclosure.
  • FIG. 2 is a flowchart of a downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 3 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 4 is another reverse HARQ result shown by the present disclosure according to an exemplary embodiment. Feed the scene diagram.
  • FIG. 5 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 6 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 7 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 8 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of another downlink HARQ result feedback scenario according to an exemplary embodiment of the present disclosure.
  • FIG. 10 is a flowchart of another downlink HARQ result feedback method according to an exemplary embodiment of the present disclosure.
  • FIG. 11 is a block diagram of a downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 12 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 13 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 14 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 15 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 16 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 17 is a block diagram of another downlink HARQ result feedback apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of a terminal according to an exemplary embodiment of the present disclosure.
  • FIG. 19 is a schematic structural diagram of a base station according to an exemplary embodiment of the present disclosure.
  • first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as second information without departing from the scope of the present disclosure.
  • second information may also be referred to as first information.
  • word "if” as used herein may be interpreted as "when” or “when” or “in response to a determination.”
  • a schematic diagram of a downlink HARQ feedback scenario is provided in the embodiment of the present disclosure.
  • the terminal 11 transmits terminal capability information to the base station 12, and the base station 12 configures a feedback type for the terminal 11 based on the terminal capability information, and the feedback is provided. The type is returned to the terminal 11.
  • the terminal 11 is configured by the base station 12 for itself.
  • the downlink feedback channel feeds back the HARQ result of the downlink data to the base station 12. Otherwise, the terminal 11 feeds back the HARQ result of the downlink data to the base station 12 using the PHICH channel.
  • FIG. 2 is a downlink HARQ result feedback method according to an exemplary embodiment, which includes the following steps:
  • the terminal capability information is sent to the base station, where the terminal capability information includes: first terminal capability information used to represent the terminal to support the low-latency service, and used to represent the terminal to request the base station to be the self- Configuring a second terminal capability information corresponding to the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, Determining, by the base station, an independent downlink feedback channel configured by the terminal;
  • step 102 receiving, by the base station, a feedback type configured for the terminal;
  • step 103 when the feedback type is consistent with the target feedback type, the HARQ result of the downlink data is fed back to the base station by using the downlink feedback channel configured by the base station for itself.
  • the terminal may send its own terminal capability information to the base station, and the base station configures a feedback type for the terminal based on the terminal capability information. If the feedback type configured by the base station for the terminal is consistent with the target feedback type of the low-latency service requested by the terminal, the terminal may feed back to the base station by using the independent downlink feedback channel configured by the base station for itself. HARQ results of downlink data. Through the above process, the terminal quickly performs HARQ result feedback of downlink data by using an independent downlink feedback channel corresponding to the low-latency service, and implements low-latency synchronous feedback, which satisfies the low-latency service requirement in the 5G system.
  • the terminal capability information may include: first terminal capability information and second terminal capability information.
  • the first terminal capability information is used to indicate that the terminal supports low-latency services, for example, the driverless, industrial automation, and the like in the URLLC scenario are low. Time-delayed, highly reliable connected services.
  • the second terminal capability information is used to indicate that the terminal requests the base station to configure a target feedback type corresponding to the low-latency service, and the target feedback type is used to indicate that the terminal feeds back downlink data to the base station.
  • the HARQ result is an independent downlink feedback channel configured by the base station for the terminal, that is, the second terminal capability information can be used to represent the terminal support and request the base station to configure the target feedback type for itself.
  • the terminal may send the foregoing terminal capability information to the base station by using an RRC (Radio Resource Control) connection establishment request.
  • RRC Radio Resource Control
  • the base station configures a feedback type for the terminal according to the foregoing terminal capability information sent by the terminal in combination with its own resource capability.
  • the terminal directly receives the feedback type configured by the base station for the terminal according to the related technology.
  • the terminal does not need to demodulate the PHICH channel at this time, but may accept the downlink feedback channel configured by the base station for itself, and pass the The downlink feedback channel feeds back the HARQ result of the downlink data to the base station.
  • FIG. 3 is a flowchart of another downlink HARQ result feedback method according to the embodiment shown in FIG. 2, where step 103 may include:
  • step 103-1 a target scheduling unit determined by the base station based on the terminal capability information is acquired.
  • the target scheduling unit is a time domain unit used when the terminal feeds back the HARQ result of the downlink data to the base station.
  • the target scheduling unit may be a mini-slot (slot) or a sub-frame, where the duration occupied by the mini-slot is smaller than the duration occupied by the slot, and the duration occupied by the slot. It is smaller than the duration occupied by the subframe.
  • the base station may determine the target scheduling unit as a mini-slot or a slot according to the terminal capability information.
  • step 103-2 determining a feedback delay of the HARQ result of the feedback downlink data,
  • the feedback delay is in units of the target scheduling unit.
  • the feedback delay of the terminal is in units of subframes.
  • the terminal delays in determining the feedback, and needs to be in the target scheduling unit, that is, the feedback delay determined by the terminal is in the target scheduling unit.
  • mini-slot or slot is a unit.
  • the terminal may determine the feedback delay according to its own capability, for example, the feedback delay is n+3 or n+4, the unit is mini-slot or slot, and n is the mini-slot of the received downlink data.
  • step 103-3 in the downlink feedback channel configured by the base station, the downlink data is fed back to the base station in a time domain position corresponding to the feedback delay in units of the target scheduling unit. HARQ results.
  • the terminal uses the target scheduling unit as a unit in the downlink feedback channel, and feeds back the HARQ result of the downlink data to the base station in the time domain position corresponding to the feedback delay.
  • the downlink data is the data sent by the base station to the terminal, and the HARQ result may be an ACK (acknowledgement) signal or a NACK (unacknowledged) signal.
  • the terminal performs error detection according to the related technology. If the reception is correct, the HARQ result is an ACK signal, and the error HARQ result is a NACK signal.
  • the base station receives the ACK signal, it transmits new data to the terminal, otherwise the base station resends the last transmitted data.
  • the target scheduling unit is in mini-slot unit, and the feedback delay is n+3, then the 0th mini-slot of the downlink data sent by the terminal for the base station and the HARQ result of the first mini-slot. It will be fed back to the base station in the third mini-slot and the fourth mini-slot that send the uplink data.
  • the target scheduling unit is determined according to the terminal capability information, and the terminal capability information indicates that the terminal supports the low-latency service. Therefore, the target scheduling unit may be smaller, and the terminal may quickly perform the downlink feedback channel.
  • the HARQ result feedback of the downlink data ensures that the base station can receive the downlink HARQ result.
  • the downlink HARQ feedback method is as shown in FIG. 5, and FIG. 5 is based on Another flowchart of the downlink HARQ result feedback method shown on the basis of the embodiment shown in FIG. 2 may further include:
  • step 104 when the feedback type is inconsistent with the target feedback type, the HARQ result indicating that the PHICH channel feeds back downlink data to the base station is automatically retransmitted by physical hybrid.
  • the base station In this step, if the base station is inconsistent with the target feedback type configured by the terminal based on the terminal capability information and the resource information of the terminal, the base station does not configure an independent downlink corresponding to the low service delay.
  • the feedback channel is sent to the terminal, and the terminal can feed back the HARQ result of the downlink data to the base station through the PHICH (Physical Hybrid ARQ Indicator Channel) channel according to the related art.
  • PHICH Physical Hybrid ARQ Indicator Channel
  • the terminal can still feed back the HARQ result of the downlink data to the base station through the PHICH channel, and ensure that the base station can normally receive the downlink data. HARQ results.
  • the downlink HARQ feedback method described above is further described from the base station side.
  • FIG. 6 is another downlink HARQ result feedback method according to an exemplary embodiment, including the following steps:
  • the terminal capability information sent by the terminal is received, where the terminal capability information includes: first terminal capability information used to represent the terminal to support low-latency service, and used to represent the terminal to request the base station to be
  • the second terminal capability information corresponding to the target feedback type of the low-latency service is configured by itself, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station,
  • the base station is an independent downlink feedback channel configured by the terminal;
  • a feedback type is configured for the terminal based on the terminal capability parameter
  • step 203 the feedback type is sent to the terminal.
  • the base station may configure a feedback type for the terminal based on the terminal capability information sent by the terminal, and send the feedback type to the terminal.
  • the feedback type of the station configuration selects an appropriate channel for HARQ result feedback of downlink data.
  • the above downlink HARQ feedback process can be applied to a 5G system, and the scheduling unit can be no longer limited to a subframe.
  • the base station may receive the terminal capability information sent by the terminal according to the related technology.
  • the terminal capability information may include: first terminal capability information and second terminal capability information.
  • the first terminal capability information is used to indicate that the terminal supports low-latency services, such as unmanned driving, industrial automation, and the like, which require low latency and high reliability connection in a URLL scenario.
  • the second terminal capability information is used to indicate that the terminal requests the base station to configure a target feedback type corresponding to the low-latency service, and the target feedback type is used to indicate that the terminal feeds back downlink data to the base station.
  • the HARQ result is an independent downlink feedback channel configured by the base station for the terminal, that is, the second terminal capability information can be used to represent the terminal support and request the base station to configure the target feedback type for itself.
  • the base station when the base station configures the feedback type for the terminal, the base station preferentially configures the feedback type of the terminal that sends the terminal capability information as the target feedback type.
  • the feedback type may also be configured as a normal feedback type.
  • the common feedback type is used to instruct the terminal to use the PHICH channel to feed back the HARQ result of the downlink data according to the related technology.
  • the base station After the base station configures the feedback type for the terminal, the base station sends the feedback type to the terminal according to the related technology.
  • the base station may configure an independent downlink for the terminal, in order to ensure that the terminal can quickly perform low-latency synchronization feedback. Feedback channel. That is, the downlink HARQ feedback method is as shown in FIG. 7.
  • FIG. 7 is a flowchart of another downlink HARQ result feedback method according to the embodiment shown in FIG. 6, and may further include:
  • step 204 when the feedback type is consistent with the target feedback type, The terminal configures the downlink feedback channel.
  • step 204 is as shown in FIG. 8.
  • FIG. 8 is a flowchart of another downlink HARQ result feedback method according to the embodiment shown in FIG.
  • a target scheduling unit is determined based on the terminal capability information.
  • the target scheduling unit is a time domain unit used when the terminal feeds back the HARQ result of the downlink data to the base station.
  • the base station may determine the target scheduling unit based on the terminal capability information reported by the terminal.
  • the target scheduling unit may be a mini-slot, a slot, or a subframe.
  • the base station in order to meet the low-latency service requirement, may determine the target scheduling unit as a mini-slot or a slot according to the terminal capability information.
  • a downlink feedback channel corresponding to at least one bit of each of the target scheduling units is configured for the terminal, and the downlink feedback channel is used only for the terminal to feed back HARQ results of downlink data to the base station.
  • each of the target scheduling units corresponds to at least one bit of the downlink feedback channel, that is, the HARQ result of each target scheduling unit may be fed back by at least one bit, and the downlink is The feedback channel is only used for the terminal to feed back the HARQ result of the downlink data to the base station.
  • the base station sends downlink data to each mini-slot of the terminal, and the terminal feeds back the HARQ result through the downlink feedback channel.
  • the downlink data of each mini-slot is fed back by at least one bit to whether the terminal receives the correct HARQ result. If the terminal receives the correct, the HARQ result is an ACK signal, and the error HARQ result is a NACK signal.
  • the base station receives the ACK signal, it sends new data to the terminal.
  • the base station receives the NACK signal, the base station resends the last transmitted data.
  • the downlink feedback channel is used to feedback whether the terminal correctly receives downlink data, and therefore has no relationship with the downlink scheduling of the terminal side, and only depends on the uplink scheduling situation of the base station side.
  • the downlink feedback channel is in units of target scheduling units and occupies only a small amount of frequency resources. Therefore, the above downlink HARQ feedback process can be applied to a 5G system, and the scheduling unit can be no longer limited to a subframe.
  • the terminals still use the PHICH channel feedback downlink configured by the 5G system according to the related technology. HARQ results for the data.
  • FIG. 10 is another downlink HARQ result feedback method according to an exemplary embodiment, including the following steps:
  • step 301 the terminal requests the transmission terminal capability information to the base station through the radio resource control connection request.
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support a low-latency service, and used to indicate that the terminal requests the base station to configure itself to correspond to the low-latency service. a second terminal capability information of the target feedback type, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic repeat request HARQ result of the downlink data to the base station, and uses the independent configuration configured by the base station for the terminal.
  • Downstream feedback channel used to represent the terminal to support a low-latency service, and used to indicate that the terminal requests the base station to configure itself to correspond to the low-latency service.
  • step 302 the base station configures a feedback type for the terminal based on the terminal capability parameter.
  • step 303 the base station sends the feedback type to the terminal.
  • step 304 is performed, otherwise step 306 is performed.
  • step 304 the base station configures an independent downlink feedback channel for the terminal.
  • the configuration is the same as the configuration of the downlink feedback channel. The details are not mentioned here.
  • step 305 the terminal feeds back the HARQ result of the downlink data to the base station by using the downlink feedback channel.
  • step 306 the terminal feeds back the HARQ result of the downlink data to the base station through the PHICH channel.
  • the terminal can quickly perform HARQ result feedback of downlink data by using an independent downlink feedback channel corresponding to the low-latency service, and implement low-latency synchronous feedback to satisfy Low latency business needs in 5G systems.
  • the terminal may feed back the HARQ result of the downlink data to the base station through the PHICH channel.
  • the terminal can feed back the HARQ result of the downlink data to the base station through the PHICH channel, and ensure that the base station can normally receive the HARQ result of the downlink data.
  • the present disclosure also provides an application function implementation apparatus and an embodiment of a corresponding terminal.
  • FIG. 11 is a downlink HARQ result feedback apparatus according to an exemplary embodiment, including:
  • the first sending module 410 is configured to send terminal capability information to the base station, where the terminal capability information includes: first terminal capability information used to represent the terminal to support the low-latency service, and used to represent the terminal requesting
  • the base station configures, by itself, second terminal capability information corresponding to the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the downlink automatic data retransmission request HARQ result to the base station.
  • the independent downlink feedback channel configured by the base station for the terminal is used;
  • the first receiving module 420 is configured to receive a feedback type that is returned by the base station and configured for the terminal;
  • the first feedback module 430 is configured to: when the feedback type is consistent with the target feedback type, feed back the HARQ result of the downlink data to the base station by using the downlink feedback channel configured by the base station for itself.
  • FIG. 12 is a block diagram of another downlink HARQ result feedback apparatus according to the embodiment shown in FIG. 11, where the first sending module 410 includes:
  • the sending submodule 411 is configured to send the terminal capability information to the base station through the radio resource control connection establishment request.
  • FIG. 13 is a block diagram of another downlink HARQ result feedback apparatus according to the embodiment shown in FIG. 11, the first feedback module 430 includes:
  • the obtaining sub-module 431 is configured to acquire a target scheduling unit that is determined by the base station based on the terminal capability information, where the target scheduling unit is a time domain unit used by the terminal to feed back the HARQ result of the downlink data to the base station;
  • the first determining sub-module 432 is configured to determine a feedback delay of the HARQ result of the feedback downlink data, where the feedback delay is in units of the target scheduling unit;
  • the feedback sub-module 433 is configured to: in the downlink feedback channel configured by the base station, feed back downlink data to the base station in a time domain position corresponding to the feedback delay in units of the target scheduling unit. HARQ results.
  • FIG. 14 is a block diagram of another downlink HARQ result feedback apparatus according to the embodiment shown in FIG.
  • the second feedback module 440 is configured to: when the feedback type is inconsistent with the target feedback type, automatically retransmit the HARQ result indicating that the PHICH channel feeds back downlink data to the base station by using physical hybrid.
  • FIG. 15 is another downlink HARQ result feedback apparatus according to an exemplary embodiment, including:
  • the second receiving module 510 is configured to receive the terminal capability information sent by the terminal, where the terminal capability information includes: first terminal capability information used to represent the terminal to support the low latency service, and used to represent the terminal request
  • the base station configures, by itself, second terminal capability information corresponding to the target feedback type of the low-latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic repeat request (HARQ) of the downlink data to the base station.
  • HARQ hybrid automatic repeat request
  • the feedback type configuration module 520 is configured to configure a feedback type for the terminal based on the terminal capability parameter
  • the second sending module 530 is configured to send the feedback type to the terminal.
  • FIG. 16 is a block diagram of another downlink HARQ result feedback apparatus according to the embodiment shown in FIG.
  • the feedback channel configuration module 540 is configured to configure the downlink feedback channel for the terminal when the feedback type is consistent with the target feedback type.
  • FIG. 17 is a block diagram of another downlink HARQ result feedback apparatus according to the embodiment shown in FIG. 16, the feedback channel configuration module 540 includes:
  • the second determining sub-module 541 is configured to determine a target scheduling unit based on the terminal capability information, where the target scheduling unit is a time domain unit used by the terminal to feed back the HARQ result of the downlink data to the base station;
  • the feedback channel configuration sub-module 542 is configured to configure, for the terminal, a downlink feedback channel corresponding to at least one bit of each target scheduling unit, where the downlink feedback channel is used only for the terminal to feed back downlink data to the base station. HARQ results.
  • the device embodiment since it basically corresponds to the method embodiment, reference may be made to the partial description of the method embodiment.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, ie may be located in one Places, or they can be distributed to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the objectives of the present disclosure. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the embodiment of the present disclosure further provides a terminal, including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low latency service, and used to indicate that the terminal requests the base station to configure itself to correspond to the Second terminal capability letter of the target feedback type of low latency service
  • the target feedback type is used to indicate that the terminal feeds back the hybrid automatic repeat request (HARQ) result of the downlink data to the base station, and uses the independent downlink feedback channel configured by the base station for the terminal;
  • HARQ hybrid automatic repeat request
  • the HARQ result of the downlink data is fed back to the base station by using the downlink feedback channel configured by the base station for itself.
  • FIG. 18 is a schematic structural diagram of a downlink HARQ feedback apparatus according to an exemplary embodiment.
  • a downlink HARQ feedback device 1800 is illustrated, which may be a computer, a mobile phone, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, according to an exemplary embodiment.
  • apparatus 1800 can include one or more of the following components: processing component 1801, memory 1802, power component 1803, multimedia component 1804, audio component 1805, input/output (I/O) interface 1806, sensor component 1807, And a communication component 1808.
  • Processing component 1801 typically controls the overall operation of device 1800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • Processing component 1801 may include one or more processors 1809 to execute instructions to perform all or part of the steps of the above described methods.
  • processing component 1801 can include one or more modules to facilitate interaction between component 1801 and other components.
  • the processing component 1801 can include a multimedia module to facilitate interaction between the multimedia component 1804 and the processing component 1801.
  • Memory 1802 is configured to store various types of data to support operation at device 1800. Examples of such data include instructions for any application or method operating on device 1800, contact data, phone book data, messages, pictures, videos, and the like.
  • the memory 1802 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable. 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 Electrically erasable programmable read only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Disk Disk or Optical Disk.
  • Power component 1803 provides power to various components of device 1800.
  • Power component 1803 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 1800.
  • the multimedia component 1804 includes a screen between the device 1800 and the user that provides an output interface.
  • the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor may sense not only the boundary of the touch or sliding action, but also the duration and pressure associated with the touch or slide operation.
  • the multimedia component 1804 includes a front camera and/or a rear camera. When the device 1800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 1805 is configured to output and/or input audio signals.
  • audio component 1805 includes a microphone (MIC) that is configured to receive an external audio signal when device 1800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode.
  • the received audio signal may be further stored in memory 1802 or transmitted via communication component 1808.
  • audio component 1805 also includes a speaker for outputting an audio signal.
  • the I/O interface 1806 provides an interface between the processing component 1801 and the peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to, a home button, a volume button, a start button, and a lock button.
  • Sensor assembly 1807 includes one or more sensors for providing status assessment of various aspects to device 1800.
  • sensor assembly 1807 can detect an open/closed state of device 1800, relative positioning of components, such as the display and keypad of device 1800, and sensor component 1807 can also detect a change in position of one component of device 1800 or device 1800. The presence or absence of contact by the user with the device 1800, the orientation or acceleration/deceleration of the device 1800 and the temperature change of the device 1800.
  • Sensor assembly 1807 can include a proximity sensor configured to Detect the presence of nearby objects without any physical contact.
  • Sensor assembly 1807 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 1807 can also include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • Communication component 1808 is configured to facilitate wired or wireless communication between device 1800 and other devices.
  • the device 1800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
  • communication component 1808 receives broadcast signals or broadcast associated information from an external broadcast management system via a broadcast channel.
  • the communication component 1808 also includes a near field communication (NFC) module to facilitate short range communication.
  • NFC near field communication
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • device 1800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation for performing the above methods.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor or other electronic component implementation for performing the above methods.
  • non-transitory computer readable storage medium comprising instructions, such as a memory 1802 comprising instructions executable by processor 1809 of apparatus 1800 to perform the above method.
  • the non-transitory computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.
  • the apparatus 1800 when the instructions in the storage medium are executed by the processor, the apparatus 1800 is enabled to perform the downlink HARQ feedback method described above.
  • an embodiment of the present disclosure further provides a base station, including:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the terminal capability information includes: first terminal capability information used to represent the terminal to support the low-latency service, and used to identify that the terminal requests the base station to configure the corresponding The second terminal capability information of the target feedback type of the low latency service, where the target feedback type is used to indicate that the terminal feeds back the hybrid automatic retransmission request HARQ result of the downlink data to the base station, and uses the base station as the location An independent downlink feedback channel configured by the terminal;
  • FIG. 19 is a schematic structural diagram of a downlink HARQ feedback apparatus 1900 according to an exemplary embodiment.
  • Apparatus 1900 can be provided as a base station.
  • apparatus 1900 includes a processing component 1922, a wireless transmit/receive component 1924, an antenna component 1926, and a signal processing portion specific to the wireless interface.
  • Processing component 1922 can further include one or more processors.
  • One of the processing components 1922 can be configured to perform the downlink HARQ feedback method described above.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne un procédé et dispositif de rétroaction de HARQ de liaison descendante, ainsi qu'un terminal et une station de base. Le procédé comporte les étapes consistant à: envoyer des informations de fonctionnalités de terminal à une station de base, les informations de fonctionnalités de terminal comportant des premières informations de fonctionnalités de terminal utilisées pour indiquer qu'un terminal prend en charge un service à faible retard temporel, et des secondes informations de fonctionnalités de terminal utilisées pour indiquer que le terminal demande à la station de base de configurer, pour le terminal, un type de rétroaction visé correspondant au service à faible retard temporel, le type de rétroaction visé étant utilisé pour indiquer que le terminal utilise, lorsqu'il renvoie un résultat de HARQ de données de liaison descendante à la station de base, un canal indépendant de rétroaction de liaison descendante configuré par la station de base pour le terminal; recevoir un type de rétroaction configuré pour le terminal et renvoyé par la station de base; et lorsque le type de rétroaction concorde avec le type de rétroaction visé, renvoyer le résultat de HARQ des données de liaison descendante à la station de base via le canal de rétroaction de liaison descendante configuré par la station de base pour le terminal. Dans la présente invention, un terminal réalise rapidement le renvoi d'un résultat de HARQ de données de liaison descendante en utilisant un canal indépendant de rétroaction de liaison descendante correspondant à un service à faible retard temporel, réalisant ainsi une rétroaction synchrone à faible retard temporel, et satisfaisant des exigences de service à faible retard temporel dans un système 5G.
PCT/CN2017/081663 2017-04-24 2017-04-24 Procédé et dispositif de rétroaction de harq de liaison descendante, terminal et station de base WO2018195707A1 (fr)

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CN201780000250.7A CN109121464B (zh) 2017-04-24 2017-04-24 下行harq反馈方法及装置、终端和基站

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