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WO2016169352A1 - Procédé et dispositif de rétroaction, et support de stockage informatique - Google Patents

Procédé et dispositif de rétroaction, et support de stockage informatique Download PDF

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Publication number
WO2016169352A1
WO2016169352A1 PCT/CN2016/076119 CN2016076119W WO2016169352A1 WO 2016169352 A1 WO2016169352 A1 WO 2016169352A1 CN 2016076119 W CN2016076119 W CN 2016076119W WO 2016169352 A1 WO2016169352 A1 WO 2016169352A1
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Prior art keywords
data block
feedback
terminal
resource
data
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PCT/CN2016/076119
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English (en)
Chinese (zh)
Inventor
刘文豪
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a feedback method, apparatus, and computer storage medium.
  • the general view is that the feedback delay of the system will be reduced to 1/10-1/5 of the current LTE (Long Term Evolution) system.
  • LTE Long Term Evolution
  • the feedback of the terminal decoded data feeds back the demodulation of the service data according to a fixed timing relationship.
  • This will generate time overhead in two parts: 1) a fixed time after demodulation of a data packet and then feedback the demodulation of the service data; 2) a complete data packet must be demodulated to feedback the data, if it is large
  • the packet demodulation takes up extra time. Therefore, the feedback delay of the terminal feedback data in the existing communication system is large.
  • Embodiments of the present invention are directed to providing a feedback method and apparatus that can reduce feedback delay.
  • An embodiment of the present invention provides a feedback method, which is applied to a base station, and includes the following steps:
  • Corresponding data transmission processing is performed based on the demodulation result.
  • the relationship between the first data block and the second data block includes at least one of the following:
  • the modulation order of the first data block is equal to or higher than the modulation order of the second data block
  • the original number of bits of the first data block is less than or equal to the original number of bits of the second data block
  • the duration of the first data block is less than or equal to the duration of the second data block.
  • the method further includes:
  • the transport data block comprises a first data block and a second data block.
  • the step of performing corresponding data transmission processing according to the demodulation result includes:
  • the step of retransmitting the first data block and the second data block includes:
  • the first data block and the second data block are retransmitted at a next scheduling unit.
  • the step of allocating a feedback resource for the terminal to demodulate the first data block by the terminal includes:
  • the feedback resource is allocated to the terminal according to the determined location.
  • the step of determining a location of the feedback resource of the first data block demodulation result by the terminal includes:
  • the method before the sending the data block to the terminal by using the data transmission resource, the method further includes:
  • first resource indication information indicating a location of the data transmission resource and second resource indication information indicating a location of the feedback resource
  • the step of sending the first resource indication information and the second resource indication information to the terminal includes:
  • the first resource indication information and the second resource indication information are sent to the terminal by using a high frequency band carrier or a low frequency band carrier.
  • the present invention provides another feedback method, which is applied to the terminal, and includes the following steps:
  • a transport data block sent by a base station receives, in a scheduling unit, a transport data block sent by a base station, where the transport data block includes: a first data block and a second data block;
  • the feedback method before the receiving the first transmission data block sent by the base station, the feedback method further includes:
  • the learned transport data block includes: the first data block and the second data block.
  • the feedback method before the receiving the data block sent by the base station, the feedback method further includes:
  • first resource indication information receives, by the base station, first resource indication information and second resource indication information, where the first resource is The source indication information is used to indicate a location of the data transmission resource of the transport data block, and the second resource indication information is used to indicate a location of the feedback resource;
  • the step of receiving the transport data block sent by the base station includes:
  • the step of feeding back the demodulation result of the first data block to the base station by using the feedback resource allocated by the base station includes:
  • the feedback method further includes:
  • the second data block is continuously demodulated.
  • the method further includes:
  • the base station is triggered to retransmit the transport data block by using a layer above the MAC layer or the MAC, or the sub base station of the base station is notified to perform the transport data block. Retransmission.
  • the method further includes:
  • the embodiment of the present invention further provides a feedback apparatus, which is applied to a base station, and includes: a dividing module, a resource allocation module, a sending module, a receiving module, and a processing module;
  • the dividing module is configured to divide one transport data block into a first data block and a second data block;
  • the resource allocation module is configured to allocate, to the terminal, a feedback resource for feeding back the first data block demodulation result, and allocate a data transmission resource for the transmission data block;
  • the sending module is configured to send the transport data block to the terminal by using the data transmission resource in a scheduling unit;
  • the receiving module is configured to receive a demodulation result of the first data block that is sent by the terminal through the feedback resource;
  • the processing module is configured to perform corresponding data transmission processing according to the demodulation result.
  • the relationship between the first data block and the second data block includes at least one of the following:
  • the modulation order of the first data block is equal to or higher than the modulation order of the second data block
  • the original number of bits of the first data block is less than or equal to the original number of bits of the second data block
  • the duration of the first data block is less than or equal to the duration of the second data block.
  • the feedback device further includes: an indication information acquiring module;
  • the indication information acquiring module is configured to acquire first resource indication information for indicating a location of the data transmission resource and second resource indication information for indicating a location of the feedback resource;
  • the sending module is further configured to send the first resource indication information and the second resource indication information to the terminal in one scheduling unit before sending the transport data block to the terminal.
  • the embodiment of the invention further provides another feedback device, which is applied to the terminal, and includes: a receiving module and a demodulation feedback module;
  • the receiving module is configured to receive, in a scheduling unit, a transport data block sent by the base station,
  • the transport data block includes: a first data block and a second data block;
  • the demodulation feedback module is configured to demodulate the first data block, and feed back a demodulation result of the first data block to the base station by using a feedback resource allocated by the base station.
  • the method further includes: the feedback device further includes: a processing module;
  • the processing module is configured to continue demodulating the second data block when the first data block is successfully demodulated, and to continue to perform the demodulation when the first data block fails to be demodulated Demodulating the second data block, if the second data block fails to be demodulated, triggering, by the MAC layer or a layer above the MAC, the base station to retransmit the transport data block, or notifying the base station of the base station Retransmitting the transport data block.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to perform the feedback method of any of the foregoing.
  • the embodiment of the present invention provides a feedback method, a device, and a computer storage medium.
  • the feedback method is applied to a base station, including: dividing a transport data block into a first data block and a second data block; Deriving a feedback resource of the first data block demodulation result, and allocating a data transmission resource for the transmission data block; transmitting the transmission data block to the terminal by using the data transmission resource in a scheduling unit; a demodulation result of the first data block fed back by the feedback resource by the terminal; performing corresponding data transmission processing according to the demodulation result; the feedback method of the present invention may divide one transmission data block into two data Blocking, selecting one of the transport data blocks as a demodulation reference data block (specifically, the first data block), and allocating a feedback resource that feeds back the demodulation result of the demodulation reference data block, so that the terminal is in the demodulation reference data block After demodulation, the demodulation result of the demodulation reference data block can be immediately fed back through the feedback resource
  • the feedback delay can be shortened, and further, the feedback delay can be shortened, the speed of transmitting data by the base station can be improved, the time from the debugging system to the stable transmission of the data is shortened, and the system is improved. Huff and puff the amount.
  • FIG. 1 is a schematic flowchart diagram of a feedback method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of transmission of service data transmission and feedback using a high frequency band for both a service data transmission carrier and a feedback carrier according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic flowchart diagram of another feedback method according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a feedback method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart diagram of another feedback method according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of transmission of service data transmission and feedback according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of another service data transmission and feedback transmission according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic structural diagram of a feedback apparatus according to Embodiment 7 of the present invention.
  • FIG. 9 is a schematic structural diagram of another feedback apparatus according to Embodiment 7 of the present invention.
  • FIG. 10 is a schematic structural diagram of a feedback apparatus according to Embodiment 8 of the present invention.
  • FIG. 11 is a schematic structural diagram of another feedback apparatus according to Embodiment 8 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the present embodiment provides a feedback method, which is applied to the base station, as shown in FIG. 1 , and includes the following steps:
  • Step 101 Divide a transport data block into a first data block and a second data block.
  • a complete service transmission data block may be divided into a first data block and a second data block.
  • the second data block may be composed of one or more sub data blocks, and the same
  • the first data block in the sample embodiment may also consist of one or more sub-blocks.
  • first data block and the second data may be independently encoded.
  • the relationship between the first data block and the second data may include at least one of the following:
  • the modulation order of the first data block is equal to or higher than the modulation order of the second data block
  • the original number of bits of the first data block is less than or equal to the original number of bits of the second data block
  • the duration of the first data block is less than or equal to the duration of the second data block.
  • the first data block is substantially a demodulation reference data block, and the data block functions as a detection terminal.
  • the first data block in this embodiment may also be CRC (cyclic redundancy check), so that the terminal can judge the first through the CRC. Whether the data block is demodulated successfully.
  • CRC cyclic redundancy check
  • Step 102 Allocate a feedback resource for feeding back the first data block demodulation result to the terminal, and allocate a data transmission resource for the transmission data block.
  • the base station In order to enable the terminal to feedback the demodulation result of the first data block, the base station needs to allocate a corresponding feedback resource (for example, ACK/NACK resource) to the terminal, in order to be able to transmit the transmission data block, for example, the service data block, to the terminal.
  • a corresponding feedback resource for example, ACK/NACK resource
  • the base station also needs to allocate data transmission resources for the transport data block.
  • the method in this embodiment may first determine the location of the feedback resource, and by determining the location of the suitable feedback resource, the terminal may be in the first data block. After the demodulation, the corresponding feedback resource is obtained in time; therefore, the process of allocating the feedback resource for the terminal to demodulate the first data block by the terminal in the embodiment may include:
  • the feedback resource is allocated to the terminal according to the determined location.
  • determining, by the terminal, a feedback of the demodulation result of the first data block can include:
  • the base station may estimate the propagation delay between the base station and the terminal according to the received sounding signal or the access signal; the base station may also receive the terminal pair data reported by the terminal. Demodulation processing capability.
  • the demodulation processing capability reported by the terminal in this embodiment includes: demodulating the demodulation overhead time of the first data block and the time overhead of the demodulation result group packet (for example, ACK/NACK group packet).
  • the base station learns the propagation delay of the terminal in the connected state, and the terminal reports the demodulation processing capability.
  • the base station determines the time for the reference data packet to complete demodulation based on the propagation delay and the demodulation processing capability of the terminal, according to this time. It allocates a resource location for transmitting the reference packet corresponding to the ACK/NACK.
  • the base station receives the demodulation capability level fed back by the terminal, and the base station determines the propagation delay between the base station and the terminal according to the signal or channel sent by the terminal.
  • the base station determines (estimates) the time required for the terminal to demodulate the first data block based on the demodulation capability level of the terminal feedback, and the base station determines, according to the propagation delay and the time required for the terminal to demodulate the first data block, the terminal to report the first data block demodulation result.
  • the preferred timing is based on which the terminal allocates resources for feedback; in FIG. 2, the scheduling information of the service data (ie, the indication information of the data transmission resource) and the indication information of the feedback resource are all carried on the high frequency carrier.
  • Step 103 Send the first data block and the second data block to the terminal in sequence through the data transmission resource in a scheduling unit.
  • the transmission data block is sent to the terminal according to the high frequency carrier corresponding to the data transmission resource.
  • the data block transmission timing in one scheduling unit is: first transmitting the first data block and then transmitting the second data block.
  • the scheduling unit is a duration of 1 subframe or a microframe or a plurality of symbols in time, and is an integer multiple of one subcarrier in the frequency domain.
  • the terminal in order to enable the terminal to know that the current transmission data block is divided into the first data block and the second data block, the terminal is prevented from using the traditional feedback mechanism to feed back the demodulation result; between step 101 and step 103, The method includes: notifying the terminal that the transport data block is divided into a first data block and a second data block.
  • the transport data block can be divided into a first data block and a second data block by the terminal, for example, by broadcast, control channel, higher layer signaling or by an agreed manner.
  • the broadcast of this embodiment may be carried on a low frequency carrier (for example, a conventional 3G, 4G carrier) or on a high frequency carrier.
  • the embodiment may further include: step 101 and step 103, further comprising: notifying the terminal, when the first data block demodulation fails, the data transmission mechanism or strategy of the base station side; for example, when the first data block is solved When the adjustment fails, the subsequent data block is continuously transmitted in the current scheduling unit, and the transmission data block is retransmitted in the next scheduling unit.
  • the data transmission mechanism or policy of the terminal when the first data demodulation fails may be notified by the broadcast, the control channel, the high layer signaling, or the agreed manner.
  • the terminal may further determine that the first data block is repeatedly sent. Demodulation of the first data fails or succeeds. On the terminal side, a plurality of repeated first data blocks are demodulated, and then the demodulation result is compared to determine whether the demodulation succeeds or fails.
  • Step 104 Receive a demodulation result of the first data block that is sent by the terminal by using the feedback resource.
  • the demodulation result of the first data block is fed back by the feedback resource allocated by the base station (success or failure, that is, the demodulation succeeds by sending ACK/NACK) Or failure).
  • the demodulation result of the first data block fed back by the terminal may be received in the process of transmitting the transport data block; for example, the base station first sends the first data block and then retransmits the second data block, and after sending the first data block After the second data block is sent, the demodulation result of the first data block fed back by the terminal is received;
  • the method of this embodiment may further receive a demodulation result of the first data block fed back by the terminal after transmitting the transport data block (the first data block and the second data block).
  • the time when the base station receives the demodulation result fed back by the terminal is related to the demodulation capability and the propagation delay of the first data block by the terminal. If the demodulation capability of the terminal is strong and the propagation delay is small, the demodulation result of the first data block is fed back when the base station has not transmitted the second data block; if the terminal has weak demodulation capability and the propagation delay is If the base station is likely to send the second data block, that is, after transmitting the complete transmission data block, the demodulation result fed back by the terminal is received.
  • Step 105 Perform corresponding data transmission processing according to the demodulation result.
  • the step may include: retransmitting the first data block and the second data block when the terminal fails to demodulate the first data block.
  • the base station may retransmit the first data block and the second data block; specifically, maintaining the current data block
  • the transmission mode of the subsequent transmission data block in the secondary scheduling unit is unchanged, that is, the subsequent transmission data block is continuously transmitted in the current scheduling unit, and the first data block and the second data block are retransmitted in the next scheduling unit.
  • the first data block and the second data block may be retransmitted if there is a transmission resource in the next scheduling unit.
  • the base station when the terminal demodulates the first data block successfully, for example, when the base station receives the ACK that the terminal feeds back through the feedback resource, the base station considers that the terminal demodulates the subsequent data block should be a large probability of success. The base station continues to schedule subsequent data blocks of the terminal.
  • the relationship between the first data block and the second data block is defined to ensure that the demodulation success rate of the second data block and the subsequent data block is successful when the terminal demodulates the first data block successfully; that is, the terminal ensures the first data.
  • block demodulation succeeds, it is very likely to demodulate the success rate of subsequent data blocks such as the second data block.
  • the base station when the base station receives the ACK of the first data block demodulation by the terminal, the base station considers that the subsequent demodulated data block should be a large probability of occurrence of an ACK, and the adjustment transmission mechanism is that the base station continues to schedule the subsequent operation of the terminal. data block.
  • the base station needs to combine the traditional feedback mechanism to determine whether retransmission is needed.
  • One of the forms is to perform traditional feedback on the traditional carrier.
  • the base station receives the ACK of the first data block and the NACK of the complete transport data block for retransmission.
  • the base station When the base station receives the ACK of the first data to determine whether to refer to the traditional feedback result, if yes, if the demodulation result of the complete transport data block fed back by the traditional feedback mode is NACK, the data block is retransmitted.
  • the feedback method of this embodiment may divide one transport data block into two data blocks, select one of the transport data blocks as a demodulation reference data block (specifically, the first data block), and allocate feedback to the demodulation reference data block.
  • the feedback resource of the demodulation result enables the terminal to immediately demodulate the demodulated reference data block by feedback resource after demodulating the demodulation reference data block; it is not necessary to wait until the entire transmission data block is demodulated
  • the feedback demodulation result can shorten the feedback delay, and further shorten the feedback delay, thereby improving the speed of transmitting data by the base station, shortening the time from the debugging system to the stable transmission of data, and improving the throughput of the system. the amount.
  • the embodiment further includes:
  • first resource indication information indicating a location of the data transmission resource and second resource indication information indicating a location of the feedback resource
  • the first resource indication information and the second indication information may be generated by the base station itself or obtained by the base station from other devices.
  • the terminal may determine the data transmission resource location of the transmission data block according to the first resource indication information, and determine the location of the feedback resource according to the second resource indication information.
  • the first resource indication information and the second resource indication information may be sent to the terminal by using a high frequency band carrier (for example, a frequency band such as a millimeter wave) or a low frequency band carrier (a frequency band carrier such as 2 GHz).
  • a high frequency band carrier for example, a frequency band such as a millimeter wave
  • a low frequency band carrier a frequency band carrier such as 2 GHz
  • this embodiment further provides another feedback method, where the application base station includes the following steps:
  • Step 301 Divide a transport data block into a first data block and a second data block.
  • Step 302 Allocate a feedback resource for feeding back the first data block demodulation result to the terminal, and allocate a data transmission resource for the transmission data block.
  • the base station learns the propagation delay of the terminal in the connected state, and the terminal reports the demodulation processing capability, and the base station determines the time for the first data packet to complete demodulation based on the propagation delay and the demodulation processing capability of the terminal, according to the time.
  • the location of the ACK/NACK resource is determined, and an ACK/NACK resource is allocated according to the location.
  • the analyzed feedback resources may be located on a low frequency carrier, such as an LTE carrier, or on a high frequency carrier.
  • Step 303 Acquire first resource indication information indicating a location of the data transmission resource and second resource indication information used to indicate a location of the feedback resource.
  • the first resource indication information in this embodiment may be control information used to indicate the arrival of the transport data block.
  • Step 304 Notifying the terminal that the transport data block is divided into a first data block and a second data block.
  • the terminal notifies the terminal that the transport data block includes a first data block and a second data block by using a broadcast, a control channel, a high layer signaling, or an agreed manner, where the broadcast may be carried on a high frequency carrier or a low frequency carrier.
  • Step 305 Send the first resource indication information and the second resource indication information to the terminal in a scheduling unit.
  • the first resource indication information and the second resource indication information may be sent by using a high frequency band carrier or a low frequency band carrier.
  • Step 306 Send the first data block and the second data block to the terminal in sequence by the data transmission resource in the scheduling unit.
  • the transport data block may be sent to the terminal by using a high frequency carrier corresponding to the data transmission resource.
  • Step 307 Receive a demodulation result of the first data block that is sent by the terminal through the feedback resource.
  • the ACK/NACK that the terminal feeds back through the feedback resource may be received.
  • the ACK/NACK fed back by the terminal is received during the process of transmitting the second data block.
  • Step 308 Retransmit the first data block and the second data block when the terminal fails to demodulate the first data block; when the terminal demodulates the first data block successfully And scheduling subsequent transmission data blocks of the terminal.
  • the base station When the base station receives the demodulation feedback of the first data block as an ACK, the base station considers that the subsequent demodulated data block should be a large probability of occurrence of an ACK, and the adjustment transmission mechanism is that the base station continues to schedule subsequent data blocks of the terminal;
  • the feedback received by the base station to the demodulation reference data block is NACK, and the adjustment transmission mechanism of the base station is: maintaining the transmission mode of the subsequent demodulated data block of the current transmission unchanged, if the next scheduling unit has The transmission resource immediately retransmits the data block of this scheduling.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides a feedback method, which is applied to a terminal, and includes the following steps:
  • Step 401 Receive, in a scheduling unit, a first data block and a second data block that are sent by a base station, where the first data block and the second data block are obtained by dividing, by the base station, a transport data block. Data block.
  • the method of this embodiment may further include: learning that the transport data block comprises: the first data block and the second data block, that is, the transport data block is divided into a first data block and a second data block.
  • Step 402 Demodulate the first data block, and feed back a demodulation result of the first data block to the base station by using a feedback resource allocated by the base station.
  • the terminal after the terminal demodulates the first data block in the data block, the terminal immediately reports the demodulation result to the base station through the feedback resource, and does not need to wait for the demodulation result after the entire transmission data block is demodulated. , shortening the feedback delay and increasing the rate of data transmission.
  • the method of the embodiment may further include: receiving, by the base station, first resource indication information and second resource indication information, where the first resource indication information is used to indicate a location of the data transmission resource of the transport data block.
  • the second resource indication information is used to indicate a location of the feedback resource;
  • the step of receiving the transport data block sent by the base station in the above step 401 includes:
  • the step of feeding back the demodulation result of the first data block to the base station by using the feedback resource allocated by the base station includes:
  • the demodulation result of the first data block is fed back to the base station.
  • the method in this embodiment may further include:
  • the second data block is continuously demodulated.
  • the base station when demodulating the first data block successfully and demodulating the second data block, triggering, by the MAC layer or a layer above the MAC, the base station to retransmit the transport data block;
  • this embodiment provides another feedback method, which is applied to a terminal, and includes the following steps:
  • Step 501 Obtain that the transport data block is divided into the first data block and the second data block.
  • the transport data block is learned to include the first data block and the second data block by using a broadcast channel, a control channel, or an agreed manner.
  • Step 502 Receive first resource indication information and second resource indication information sent by the base station, where the first resource indication information is used to indicate a location of a data transmission resource of the transport data block, and the second resource indication information is used. Indicates the location of the feedback resource.
  • the first resource indication information in this embodiment may be control information used to indicate the arrival of data.
  • Step 503 Determine a location of the data transmission resource of the transport data block according to the first resource indication information, and determine a location of the feedback resource according to the second resource indication information.
  • Step 504 Acquire, according to the determined location of the data transmission resource, the first data block and the second data block sent by the base station in sequence from the corresponding data transmission resource.
  • Step 505 Demodulate the first data block, obtain a corresponding feedback resource according to the determined location of the feedback resource, and feed back the demodulation result of the first data block to the base station by using the feedback resource.
  • Step 506 Continue demodulating the second data block when the first data block is successfully demodulated or failed.
  • the second data block is continuously demodulated, and the base station pair is triggered by a layer above the MAC layer or the MAC.
  • the transport data block is retransmitted, or the sub base station of the base station is notified to retransmit the transport data block.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment introduces the feedback method of the present invention by taking the broadcast mode notification terminal that the data block includes the first data block and the second data block and the feedback resource is located on the high frequency band carrier.
  • the base station informs the terminal through the broadcast channel that the transport data block includes the first data block and the second data block on the LTE carrier.
  • the first data block demodulates the result to be NACK
  • the second data block subsequent transmission mechanism after receiving the NACK is unchanged. And retransmitting the first data block and the second data block in the next scheduling unit.
  • the base station transmits control information for indicating the arrival of the data through the LTE carrier, and the base station indicates the resource for feedback through the control information of the LTE carrier, wherein the feedback resource is located in the high frequency carrier.
  • the terminal sends a sounding signal or an access signal to the base station, and the base station estimates the propagation time between the base station and the terminal according to the received sounding signal or the access signal;
  • the terminal reports to the base station the demodulation of the first data block and the packet time overhead of the ACK/NACK.
  • the base station determines the time difference between the allocated service data and the feedback resource according to the first data block demodulation time and the ACK/NACK group packet time reported by the terminal; as shown in FIG. 6, the feedback resource allocation is at a high frequency.
  • control information indicating data arrival and feedback resource allocation ie, indication information indicating the location of the data transmission resource and the feedback resource
  • a legacy carrier such as an LTE carrier
  • the base station receives a demodulation capability level fed back by the terminal.
  • the base station determines a propagation delay between the base station and the terminal according to the signal or channel sent by the terminal, and the base station determines (estimates) the time required for the terminal to demodulate the first data block based on the demodulation capability level fed back by the terminal, and the base station according to the propagation delay and the terminal
  • the time required to demodulate the first data block determines the preferred timing at which the terminal reports the demodulation result of the first data block, and accordingly allocates resources for feedback to the terminal; in FIG. 6, Create Ack msg indicates the time at which the ACK message is created.
  • the terminal in the connected state reads the broadcast channel of the base station and learns that when the feedback result of the first data block is NACK, the subsequent part of the second data block does not change the transmission scheme, and the terminal detects the control information on the LTE carrier, and learns from the control information.
  • the base station receives the NACK of the first data feedback, and considers that the data block of the current transmission fails to be correctly demodulated.
  • the base station does not change the data transmission mechanism during the current data scheduling time, and the base station retransmits the data block in the adjacent data transmission unit. .
  • Control information for indicating the arrival of data and control information for allocating feedback resources during retransmission are still transmitted on the LTE carrier.
  • the subsequent data demodulation of the current transmission unit is continued, and the result of the current demodulation is buffered.
  • the terminal detects the control channel in the adjacent scheduling unit, determines the resource allocation of the retransmitted data block and the resource used for feedback by reading the control channel, and the terminal retransmits the previously buffered data with the current demodulated data.
  • the terminal enters the retransmission and the final data block demodulation result is ACK, and the terminal sends an ACK at the feedback resource location to complete the transmission of the current data block.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the feedback method of the present invention is introduced by using a high-level signaling manner to notify the terminal that the data block includes the first data block and the second data block and the feedback resource is located on the LTE carrier.
  • the base station informs the terminal through the high layer signaling on the LTE carrier that the transport data block contains the first data. And the second data block, when the demodulation result of the first data block is NACK, the subsequent transmission mechanism of the second data block after receiving the NACK is unchanged, and the first data block and the second data block are retransmitted in the next scheduling unit. .
  • the base station transmits control information indicating the arrival of the data through the LTE carrier, and the base station indicates, by the control information of the LTE carrier, the feedback resource, where the feedback resource is located on the LTE carrier.
  • the terminal sends a sounding signal or an access signal to the base station, and the base station estimates the propagation time between the base station and the terminal according to the received sounding signal or the access signal;
  • the terminal reports to the base station the demodulation time of the first data block and the packet time of the ACK/NACK.
  • the base station determines the time difference between the allocated service data and the feedback resource according to the first data block demodulation time, the ACK/NACK group packet time, and the propagation delay reported by the terminal.
  • the feedback resource is allocated on the LTE carrier, specifically And the base station allocates, on the LTE uplink carrier, a demodulation result that satisfies the propagation time, the demodulation, and the ACK packet time overhead requirement resource for the first data block; as shown in FIG. 7, the control information indicating the data arrival and the feedback resource allocation (ie, The indication information indicating the location of the data transmission resource and the feedback resource is carried on a legacy carrier, for example, the LTE carrier; the base station shown in FIG.
  • the base station 7 receives the demodulation capability level fed back by the terminal, and the base station determines the base station and the terminal according to the signal or channel sent by the terminal.
  • the propagation delay of the base station determines (estimates) the time required for the terminal to demodulate the first data block based on the demodulation capability level of the terminal feedback, and the base station determines the terminal to report the first according to the propagation delay and the time required for the terminal to demodulate the first data block.
  • the terminal in the connected state reads the broadcast channel of the base station to learn that when the feedback result of the first data block is NACK, the subsequent part of the second data block does not change the transmission scheme, the terminal detects the control information on the LTE carrier, and learns the service from the control information. A message arriving at the data and a feedback resource for feeding back the demodulation result, wherein the resource for feedback is on the LTE carrier.
  • the terminal receives the service data from the high frequency carrier, and the first data block of the terminal demodulation service data determines that the demodulation result is NACK, and A NACK is sent on the wave feedback resource.
  • the base station receives the NACK of the first data feedback, and considers that the data block transmitted this time is not correctly demodulated by the terminal, and the base station does not change the data transmission mechanism in the current data transmission unit, and the base station retransmits the data in the adjacent data transmission unit. data block.
  • the control information for indicating the arrival of the data and the control information for indicating the feedback resource during the retransmission are still transmitted on the LTE carrier.
  • the subsequent data demodulation of the current transmission unit is continued, and the result of the demodulation is buffered.
  • the terminal detects the control channel in the adjacent scheduling unit, determines the resource allocation of the retransmitted data block and the resource used for feedback by reading the control channel, and the terminal retransmits the previously buffered data with the current demodulated data.
  • the terminal enters the retransmission and the final data block demodulation result is ACK, and the terminal sends an ACK at the feedback resource location to complete the transmission of the current data block.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the feedback method of the present invention is introduced by informing the terminal that the data block includes the first data block and the second data block and the feedback resource is located on the high frequency band carrier by way of a control channel.
  • control message Notifying, by the control message, that one transport data block includes the first data block and the second data block, and the subsequent transmission mechanism of the second data block is unchanged when the first data block demodulation result is NACK, and is retransmitted in the next scheduling unit.
  • the control message informs the service data of the arrival and the resources used for the feedback, and the control message is carried on the LTE carrier.
  • the downlink service data is transmitted through the high-band carrier, and the ACK/NACK of the service data is fed back through the high-frequency carrier.
  • the terminal sends a sounding signal or an access signal to the base station, and the base station estimates the propagation time between the base station and the terminal according to the received sounding signal or the access signal;
  • the terminal reports to the base station the demodulation time of the first data block and the packet time of the ACK/NACK.
  • the base station determines the time difference between the allocated service data and the feedback resource according to the first data block demodulation time, the ACK/NACK group packet time, and the propagation delay reported by the terminal, as shown in FIG.
  • control information indicating data arrival and feedback resource allocation ie, indication information indicating the location of the data transmission resource and the feedback resource
  • a legacy carrier such as an LTE carrier
  • the base station determines the propagation delay between the base station and the terminal according to the signal or channel sent by the terminal, and the base station determines (estimates) the time required for the terminal to demodulate the first data block based on the demodulation capability level of the terminal feedback, and the base station according to the propagation time.
  • the delay time required for the terminal to demodulate the first data block determines a preferred timing at which the terminal reports the demodulation result of the first data block, and accordingly allocates resources for feedback to the terminal.
  • the terminal detects the control information on the LTE carrier, and the terminal detection control message in the connected state knows that when the feedback result of the first data block is NACK, the subsequent part of the second data block does not change the transmission scheme, and the service data arrives from the control information.
  • a feedback resource for feedback demodulation results wherein the resources for feedback are on a high frequency carrier.
  • the terminal receives the service data from the high frequency carrier, and the first data block of the terminal demodulation service data determines that the demodulation result is NACK, and sends a NACK on the resource for feedback corresponding to the high frequency carrier.
  • the base station receives the NACK of the first data feedback, and considers that the data block transmitted this time is not correctly demodulated by the terminal, and the base station does not change the data transmission mechanism in the current data transmission unit, and the base station retransmits the data in the adjacent data transmission unit. data block.
  • the control information for indicating the arrival of the data and the control information for indicating the feedback resource during the retransmission are still transmitted on the LTE carrier.
  • the subsequent data demodulation of the current transmission unit is continued, and the result of the demodulation is buffered.
  • the terminal detects the control channel in the adjacent scheduling unit, determines the resource allocation of the retransmitted data block and the resource used for feedback by reading the control channel, and the terminal retransmits the previously buffered data with the current demodulated data.
  • the terminal enters the retransmission and the final data block demodulation result is ACK, and the terminal sends an ACK at the feedback resource location to complete the transmission of the current data block.
  • This embodiment introduces the feedback method of the present invention by informing the terminal that the transmission data block includes the first data block and the second data block and the feedback resource is located on the high frequency band carrier by way of an agreed manner.
  • one transport data block includes a first data block and a second data block.
  • the first data block demodulation result is NACK
  • the subsequent transmission mechanism of the second data block does not change, and the next scheduling unit retransmits the first transmission unit.
  • the control message notifies the service data to arrive at the location of the feedback resource, and the control message is carried on the LTE carrier.
  • the downlink service data is transmitted through the high-band carrier, and the ACK/NACK of the service data is fed back through the high-frequency carrier.
  • the terminal sends a sounding signal or an access signal to the base station, and the base station estimates the propagation time between the base station and the terminal according to the received sounding signal or the access signal;
  • the terminal reports to the base station the demodulation time of the first data block and the packet time of the ACK/NACK.
  • the base station determines the time difference between the allocated service data and the feedback resource according to the first data block demodulation time, the ACK/NACK group packet time, and the propagation delay reported by the terminal, as shown in FIG. 6 (the feedback resource is allocated on the high frequency carrier, indicating data.
  • the control information of the arrival and feedback resources is carried on the LTE carrier).
  • the terminal detects the control information on the LTE carrier, and the terminal in the connected state learns the arrival of the service data and the feedback resource for feeding back the demodulation result from the control information, wherein the resource used for feedback is on the high frequency carrier.
  • the terminal receives the service data from the high frequency carrier, and the first data block of the terminal demodulation service data determines that the demodulation result is NACK, and sends a NACK on the resource where the high frequency carrier is located.
  • the base station receives the NACK of the first data feedback, and considers that the data block transmitted this time is not correctly demodulated by the terminal, and the base station does not change the data transmission mechanism in the current data transmission unit, and the base station retransmits the data in the adjacent data transmission unit. data block.
  • the control information for indicating the arrival of the data and the control information for indicating the feedback resource during the retransmission are still transmitted on the LTE carrier.
  • the subsequent data demodulation of the current transmission unit is continued, and the result of the demodulation is buffered.
  • the terminal detects the control channel in the adjacent scheduling unit, determines the resource allocation of the retransmitted data block and the resource used for feedback by reading the control channel, and the terminal retransmits the previously buffered data with the current demodulated data.
  • the terminal enters the retransmission and the final data block demodulation result is ACK, and the terminal sends an ACK at the feedback resource location to complete the transmission of the current data block.
  • the broadcast message at this time is the same processing method for all terminals in the cell;
  • the feedback method in this embodiment is used to indicate the demodulation of the first data block.
  • the terminal When the terminal can correctly demodulate the data of the first data block, the terminal will demodulate the subsequent data with a high probability, so the ACK is performed with a large probability.
  • Fast feedback when the terminal demodulates the first data block to NACK and continues the current transmission mechanism, the data transmission unit retransmits the data to improve the demodulation SINR of the data.
  • the embodiment provides a feedback apparatus, which is applied to a base station, and includes: a dividing module, a resource allocation module, a sending module, a receiving module, and a processing module;
  • the dividing module is configured to divide one transport data block into a first data block and a second data block;
  • the resource allocation module is configured to allocate, to the terminal, a feedback resource for feeding back the first data block demodulation result, and allocate a data transmission resource for the transmission data block;
  • the sending module is configured to, in a scheduling unit, sequentially send the first data block and the second data block to the terminal by using the data transmission resource;
  • the receiving module is configured to receive a demodulation result of the first data block that is sent by the terminal through the feedback resource;
  • the processing module is configured to perform corresponding data transmission processing according to the demodulation result.
  • the receiving module and the sending module correspond to a communication interface for performing data interaction between the base station and the terminal, for example, various air interfaces disposed on the base station.
  • the processing module and the resource allocation module can correspond to a processor or processing circuit in a base station.
  • the processor can include a central processing unit, a microprocessor, a digital signal processor or a programmable array, and the like.
  • the processing circuit can include an application specific integrated circuit.
  • the relationship between the first data block and the second data block includes at least one of the following:
  • the modulation order of the first data block is equal to or higher than the modulation order of the second data block
  • the original number of bits of the first data block is less than or equal to the original number of bits of the second data block
  • the duration of the first data block is less than or equal to the duration of the second data block.
  • the feedback device further includes: an indication information acquiring module;
  • the indication information acquiring module is configured to acquire first resource indication information for indicating a location of the data transmission resource and second resource indication information for indicating a location of the feedback resource;
  • the sending module is further configured to send the first resource indication information and the second resource indication information to the terminal in one scheduling unit before sending the transport data block to the terminal.
  • the feedback device of the implementation can shorten the system feedback delay and improve the data transmission speed.
  • this embodiment provides a feedback apparatus, which is applied to a terminal, and includes: a receiving module and a demodulation feedback module;
  • the receiving module is configured to sequentially receive the first data block and the second data block sent by the base station in a scheduling unit, where the first data block and the second data block are the base station pair Transmitting a data block to obtain a data block after division;
  • the demodulation feedback module is configured to demodulate the first data block, and feed back a demodulation result of the first data block to the base station by using a feedback resource allocated by the base station.
  • the receiving module may correspond to a receiving antenna that performs information interaction between the terminal and the base station
  • the demodulation feedback module may correspond to a transmitting antenna
  • the feedback apparatus of this embodiment may further include: a processing module;
  • the processing module is configured to continue demodulating the second data block when the first data block is successfully demodulated, and to continue to perform the demodulation when the first data block fails to be demodulated Demodulating the second data block, if the second data block fails to be demodulated, triggering, by the MAC layer or a layer above the MAC, the base station to retransmit the transport data block, or notifying the base station of the base station Retransmitting the transport data block.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de rétroaction. Le procédé de rétroaction appliqué à une station de base consiste : à diviser à un bloc de transmission de données en un premier bloc de données et en un second bloc de données ; à affecter une ressource de rétroaction pour renvoyer un résultat de démodulation du premier bloc de données à un terminal, et à affecter une ressource de transmission de données au bloc de transmission de données ; à envoyer, dans une unité de planification, le bloc de transmission de données au terminal par l'intermédiaire de la ressource de transmission de données ; à recevoir le résultat de démodulation du premier bloc de données renvoyé par le terminal par l'intermédiaire de la ressource de rétroaction ; et à réaliser un traitement de transmission de données correspondant selon le résultat de démodulation. L'invention concerne également en même temps un support de stockage informatique.
PCT/CN2016/076119 2015-04-24 2016-03-11 Procédé et dispositif de rétroaction, et support de stockage informatique Ceased WO2016169352A1 (fr)

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CN108430106B (zh) * 2017-01-03 2021-01-05 华为技术有限公司 无线通信的方法和装置
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