CN106162614B - Feedback method and device - Google Patents

Feedback method and device Download PDF

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CN106162614B
CN106162614B CN201510200681.0A CN201510200681A CN106162614B CN 106162614 B CN106162614 B CN 106162614B CN 201510200681 A CN201510200681 A CN 201510200681A CN 106162614 B CN106162614 B CN 106162614B
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data block
feedback
terminal
transmission
data
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CN106162614A (en
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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

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Abstract

The invention discloses a feedback method and a feedback device. The feedback method of the invention is applied to a base station and comprises the following steps: dividing a transmission data block into a first data block and a second data block; allocating feedback resources for feeding back the demodulation result of the first data block to a terminal, and allocating data transmission resources for the transmission data block; transmitting the transmission data block to the terminal through the data transmission resource in a scheduling unit; receiving a demodulation result of the first data block fed back by the terminal through the feedback resource; carrying out corresponding data sending processing according to the demodulation result; the feedback method of the invention can solve the technical problem of larger feedback time delay of the terminal feedback data in the existing communication system.

Description

Feedback method and device
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a feedback method and apparatus.
Background
With the continuous progress of radio technology, the popularization of various intelligent terminals and the growth of data services, the increasing abundance of mobile services for mobile communication puts higher technical demands on the future 5G system, wherein the higher technical demands comprise larger communication capacity, smaller time delay and larger amount of communication equipment connection.
The general view of the reduction of the data feedback delay is that the feedback delay of the system is reduced to 1/10-1/5 of the current lte (long Term evolution) system, and there are two ways to reduce the feedback delay: 1) designing shorter frames and subframes; 2) and improving the scheduling feedback process.
Taking LTE downlink data transmission flow as an example, the feedback of terminal decoded data feeds back the demodulation condition of service data according to a fixed timing relationship. This creates a time overhead in two links: 1) waiting for a fixed time after one data packet is demodulated, and then feeding back the demodulation condition of the service data; 2) one complete data packet must be demodulated to feed back data, and additional time is taken if the data packet is large.
Therefore, the feedback delay of the terminal feedback data in the existing communication system is large.
Disclosure of Invention
The invention provides a feedback method and a feedback device, which can solve the technical problem of large feedback time delay of terminal feedback data in the existing communication system.
In order to solve the above technical problem, the present invention provides a feedback method, which is applied to a base station, and comprises the following steps:
dividing a transmission data block into a first data block and a second data block;
allocating feedback resources for feeding back the demodulation result of the first data block to a terminal, and allocating data transmission resources for the transmission data block;
transmitting the transmission data block to the terminal through the data transmission resource in a scheduling unit;
receiving a demodulation result of the first data block fed back by the terminal through the feedback resource;
and carrying out corresponding data transmission processing according to the demodulation result.
Further, the relationship of the first data block to the second data block includes at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
Further, after dividing a transmission data block into a first data block and a second data block before transmitting the transmission data block to the terminal through the data transmission resource, the method further includes:
and informing the terminal that the transmission data block comprises a first data block and a second data block.
Further, the step of performing corresponding data transmission processing according to the demodulation result includes:
when the terminal fails to demodulate the first data block, retransmitting the first data block and the second data block;
and when the terminal successfully demodulates the first data block, scheduling the subsequent transmission data block of the terminal.
Further, the step of retransmitting the first data block and the second data block includes:
and retransmitting the first data block and the second data block in a next scheduling unit.
Further, the step of allocating feedback resources for the terminal to demodulate the first data block includes:
determining the position of a feedback resource of the demodulation result of the first data block by the terminal;
and allocating the feedback resources to the terminal according to the determined position.
Further, the step of determining the location of the feedback resource for the terminal to demodulate the first data block comprises:
acquiring the propagation delay of the terminal and the demodulation processing capacity of the terminal on data;
and determining the position of a feedback resource of the demodulation result of the first data block by the terminal according to the propagation delay and the demodulation processing capacity.
Further, before transmitting the transmission data block to the terminal through the data transmission resource, the method further includes:
acquiring first resource indication information for indicating the position of the data transmission resource and second resource indication information for indicating the position of the feedback resource;
and sending the first resource indication information and the second resource indication information to the terminal in one scheduling unit.
Further, the step of sending the first resource indication information and the second resource indication information to the terminal includes:
and sending the first resource indication information and the second resource indication information to the terminal through the high-frequency band carrier or the low-frequency band carrier.
Also in order to solve the above technical problem, the present invention provides another feedback method, applied to a terminal, including the following steps:
receiving a transmission data block transmitted by a base station in a scheduling unit, wherein the transmission data block comprises: a first data block and a second data block;
and demodulating the first data block, and feeding back a demodulation result of the first data block to the base station through a feedback resource allocated by the base station.
Further, before the receiving the second transmission data block sent by the base station, the feedback method further includes:
learning the transmission data block includes: the first data block and the second data block.
Further, before the receiving the transmission data block sent by the base station, the feedback method further includes:
receiving first resource indication information and second resource indication information sent by a base station, wherein the first resource indication information is used for indicating the position of data transmission resources of the transmission data block, and the second resource indication information is used for indicating the position of the feedback resources;
determining the position of the data transmission resource of the transmission data block according to the first resource indication information, and determining the position of the feedback resource according to the second resource indication information;
the step of receiving the transmission data block sent by the base station comprises:
acquiring a transmission data block sent by a base station from the corresponding data transmission resource according to the determined position of the data transmission resource;
the step of feeding back the demodulation result of the first data block to the base station through the feedback resource allocated by the base station includes:
and acquiring corresponding feedback resources according to the determined positions of the feedback resources, and feeding back the demodulation result of the first data block to the base station through the feedback resources.
Further, the feedback method further comprises:
and when the first data block is successfully or unsuccessfully demodulated, continuing demodulating the second data block.
Further, when the first data is successfully demodulated, after continuing to demodulate the second data block, the method further comprises:
and if the second data block is failed to be demodulated, triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC, or informing a secondary base station of the base station to retransmit the transmission data block.
Further, when demodulating the first data block fails, after continuing to demodulate the second data block, the method further comprises:
storing the demodulated transmission data;
and demodulating the first data block and the second data block retransmitted by the base station in a next scheduling unit, and if the first data block and the second data block are successfully demodulated, combining the demodulated transmission data with the previously stored demodulated transmission data.
Also, in order to solve the above technical problem, the present invention further provides a feedback apparatus, applied to a base station, including: the device comprises a dividing module, a resource allocation module, a sending module, a receiving module and a processing module;
the dividing module is used for dividing a transmission data block into a first data block and a second data block;
the resource allocation module is configured to allocate a feedback resource for feeding back the demodulation result of the first data block to a terminal, and allocate a data transmission resource for the transmission data block;
the sending module is configured to send the transmission data block to the terminal through the data transmission resource in a scheduling unit;
the receiving module is configured to receive a demodulation result of the first data block fed back by the terminal through the feedback resource;
and the processing module is used for carrying out corresponding data sending processing according to the demodulation result.
Further, the relationship of the first data block to the second data block includes at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
Further, the feedback device further comprises: an indication information acquisition module;
the indication information acquisition module is configured to acquire first resource indication information used for indicating a location of the data transmission resource and second resource indication information used 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 transmission data block to the terminal.
Also in order to solve the above technical problem, the present invention provides another feedback apparatus, applied to a terminal, including: the device comprises a receiving module and a demodulation feedback module;
the receiving module is configured to receive a transmission data block sent by a base station in a scheduling unit, where the transmission 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 through the feedback resource allocated by the base station.
Further, still include: the feedback device further comprises: a processing module;
the processing module is configured to continue demodulating the second data block when the first data block is successfully demodulated; and when the demodulation of the first data block fails, continuing to demodulate the second data block, and if the demodulation of the second data block fails, triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC layer, or informing a base station of the base station to retransmit the transmission data block.
The invention has the beneficial effects that:
the invention provides a feedback method and a device, and the feedback method is applied to a base station and comprises the following steps: dividing a transmission data block into a first data block and a second data block; allocating feedback resources for feeding back the demodulation result of the first data block to a terminal, and allocating data transmission resources for the transmission data block; transmitting the transmission data block to the terminal through the data transmission resource in a scheduling unit; receiving a demodulation result of the first data block fed back by the terminal through the feedback resource; carrying out corresponding data sending processing according to the demodulation result; the feedback method of the invention can divide a transmission data block into two data blocks, select one of the transmission data blocks as a demodulation reference data block (specifically, a first data block), and allocate feedback resources for feeding back the demodulation result of the demodulation reference data block, so that a terminal can feed back the demodulation result of the demodulation reference data block through the feedback resources immediately after demodulating the demodulation reference data block; the demodulation result does not need to be fed back after the whole transmission data block is demodulated, compared with the prior art, the feedback time delay can be shortened, further, the speed of data transmission of the base station can be increased due to the shortened feedback time delay, the time from debugging the system to stable data transmission is shortened, and the throughput of the system is increased.
Drawings
Fig. 1 is a schematic flowchart of a feedback method according to an embodiment of the present invention;
fig. 2 is a schematic transmission diagram of service data transmission and feedback in which a service data transmission carrier and a feedback carrier both use a high frequency band according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of another feedback method according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a feedback method according to a second embodiment of the present invention;
fig. 5 is a schematic flowchart of another feedback method according to a second embodiment of the present invention;
fig. 6 is a schematic transmission diagram of service data transmission and feedback according to a third embodiment of the present invention;
fig. 7 is a schematic transmission diagram of another service data transmission and feedback provided in the fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of a feedback apparatus according to a seventh embodiment of the present invention;
fig. 9 is a schematic structural diagram of another feedback apparatus according to a seventh embodiment of the present invention;
fig. 10 is a schematic structural diagram of a feedback apparatus according to an eighth embodiment of the present invention;
fig. 11 is a schematic structural diagram of another feedback device according to an eighth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
The first embodiment is as follows:
in view of the technical problem of large feedback delay of terminal feedback data in the existing communication system, the present embodiment provides a feedback method, which is applied to a base station, and as shown in fig. 1, includes the following steps:
step 101: a transmission data block is divided into a first data block and a second data block.
Specifically, a complete service transmission data block may be divided into a first data block and a second data block. In this embodiment, the second data block may be composed of one or more sub data blocks, and similarly, in this embodiment, the first data block may also be composed of one or more sub data blocks.
In this embodiment, both the first data block and the second data may be independently encoded, and the relationship between the first data block and the second data in this embodiment may include at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
In this embodiment, the first data block is substantially a demodulation reference data block, and in order to enable the terminal to determine whether the demodulation of the first data block is successful, the first data block may further include a Cyclic Redundancy Check (CRC) in this embodiment, so that the terminal can determine whether the demodulation of the first data block is successful through the CRC.
Step 102: and allocating feedback resources for feeding back the demodulation result of the first data block to the terminal, and allocating data transmission resources for the transmission data block.
In order to enable the terminal to feed back the demodulation result of the first data block, in this embodiment, the base station needs to allocate a corresponding feedback resource (e.g., an ACK/NACK resource) to the terminal, and in order to transmit a transmission data block, e.g., a service data block, to the terminal, the base station also needs to allocate a data transmission resource to the transmission data block.
In consideration of enabling the terminal to obtain the corresponding feedback resource after demodulating the first data block, the method of the embodiment may first determine the position of the feedback resource, and by determining the position of the appropriate feedback resource, the terminal may obtain the corresponding feedback resource in time after demodulating the first data block; therefore, in this embodiment, the process of allocating, to a terminal, a feedback resource for the terminal to demodulate the first data block may include:
determining the position of a feedback resource of the demodulation result of the first data block by the terminal;
and allocating the feedback resources to the terminal according to the determined position.
Preferably, in this example, the process of determining the location of the feedback resource for the terminal to demodulate the first data block may include:
acquiring the propagation delay of the terminal and the demodulation processing capacity of the terminal on data;
and determining the position of a feedback resource of the demodulation result of the first data block by the terminal according to the propagation delay and the demodulation processing capacity.
Specifically, after receiving a probe signal or an access signal sent by a terminal, a base station may estimate a propagation delay between the base station and the terminal according to the received probe signal or the access signal; the base station can also receive the demodulation processing capability of the terminal reported by the terminal to the data. In this embodiment, the demodulation processing capability reported by the terminal includes: the terminal demodulates the demodulation overhead time of the first data block and the demodulation result set (e.g., ACK/NACK set) time overhead.
In practical application, a base station learns the propagation delay of a terminal in a connected state, the terminal reports demodulation processing capacity, the base station determines the time for completing demodulation of a reference data packet based on the propagation delay and the demodulation processing capacity of the terminal, and allocates resource positions for transmitting ACK/NACK corresponding to the reference data packet to the base station according to the time, as shown in fig. 2, the base station receives the demodulation capacity grade fed back by the terminal, the base station determines the propagation delay between the base station and the terminal according to a signal or a channel sent by the terminal, the base station determines (estimates) the time required by the terminal to demodulate a first data block based on the demodulation capacity grade fed back by the terminal, the base station determines the preferred time for reporting the demodulation result of the first data block by the terminal according to the propagation delay and the time required by the terminal to demodulate the first data block, and accordingly allocates; in fig. 2, the scheduling information of the traffic data (i.e. the indication information of the data transmission resource) and the indication information of the feedback resource are both carried on the high frequency carrier.
Step 103: and sequentially sending the first data block and the second data block to the terminal through the data transmission resource in a scheduling unit.
Specifically, when the data transmission resource is located in a high frequency band carrier, the transmission data block is sent to the terminal according to the high frequency carrier corresponding to the data transmission resource.
Specifically, in this embodiment, the data block transmission timing sequence in one scheduling unit is: the first data block is transmitted first and then the second data block is transmitted.
Preferably, in this embodiment, the scheduling unit is a duration of 1 subframe or a micro frame or several symbols in time, and is an integer multiple of one subcarrier in frequency domain.
In the method of the embodiment, in order to enable the terminal to know that the data block transmitted this time is divided into the first data block and the second data block, the terminal is prevented from adopting a traditional feedback mechanism to feed back a demodulation result; between step 101 and step 103, further comprising: informing the terminal that the transmission data block is divided into a first data block and a second data block.
The transmission data block may be divided into a first data block and a second data block by the terminal, for example, by broadcasting, control channel, higher layer signaling, or in an agreed manner.
The broadcast of the present embodiment may be carried on a low-band carrier (e.g., a conventional 3G or 4G carrier), or carried on a high-band carrier.
In addition, the present embodiment may further include, between step 101 and step 103: informing the terminal of a data transmission mechanism or strategy at a base station side when the demodulation of the first data block fails; for example, when the first data block fails to be demodulated, the current scheduling unit continues to transmit the subsequent data block, and the next scheduling unit retransmits the transmitted data block. Specifically, the terminal may be notified through broadcasting, a control channel, high-layer signaling, or an agreed manner of a data transmission mechanism or policy on the station side when the first data demodulation fails.
In this embodiment, in order to enable the terminal to determine whether demodulation of the first data block fails or succeeds, in addition to the above-described manner of cyclic redundancy check, the terminal may also determine whether demodulation of the first data block fails or succeeds by repeatedly transmitting the first data block, and on the terminal side, the terminal demodulates a plurality of repeated first data blocks, and then compares the demodulation results to determine whether demodulation succeeds or fails.
Step 104: and receiving a demodulation result of the first data block fed back by the terminal through the feedback resource.
After the terminal demodulates the first data block, the demodulation result (success or failure, that is, the demodulation success or failure is indicated by sending ACK/NACK) of the first data block is fed back through the feedback resource allocated by the base station. The method of the embodiment can receive the demodulation result of the first data block fed back by the terminal in the process of sending the transmission data block; for example, the base station first sends the first data block and then sends the second data block, and receives the demodulation result of the first data block fed back by the terminal in the process of sending the second data block after sending the first data block;
the method of this embodiment may also receive the demodulation result of the first data block fed back by the terminal after the transmission of the data blocks (the first data block and the second data block) is completed.
In this embodiment, the time for the base station to receive the demodulation result fed back by the terminal is related to the demodulation capability and propagation delay of the terminal for the first data block. If the terminal has stronger demodulation capability and small propagation delay, the base station feeds back the demodulation result of the first data block when the base station has not sent the second data block; if the terminal has a weak demodulation capability and a large propagation delay, the base station may receive the demodulation result fed back by the terminal after sending the second data block, that is, sending the entire transmission data block.
Step 105: and carrying out corresponding data transmission processing according to the demodulation result.
This step may include: and when the terminal fails to demodulate the first data block, retransmitting the first data block and the second data block.
When the terminal fails to demodulate the first data block, for example, the base station receives NACK fed back by the terminal through the feedback resource, the base station may retransmit the first data block and the second data block; specifically, the transmission mode of the subsequent transmission data block in the current scheduling unit is kept 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. Further, the first data block and the second data block may be retransmitted if there is transmission resource in the next scheduling unit.
And when the terminal successfully demodulates the first data block, scheduling the subsequent transmission data block of the terminal.
In this embodiment, when the terminal successfully demodulates the first data block, for example, when the base station receives an ACK fed back by the terminal through the feedback resource, the base station considers that the terminal successfully demodulates the subsequent data block with a high probability, and at this time, the base station continues to schedule the subsequent data block of the terminal.
The above-mentioned relation to limit the first data block and the second data block is to guarantee the demodulation success rate of the terminal to the subsequent data blocks such as the second data block when the terminal demodulates the first data block successfully; that is, it is ensured that the terminal has a high probability of successfully demodulating the first data block and the subsequent data blocks such as the second data block.
For example, when the base station receives that the structure that the terminal feeds back to demodulate the first data block is ACK, the base station considers that the subsequent demodulated data block should be ACK occurring at a large probability, and the adjusting transmission mechanism is that the base station continues to schedule the subsequent data block of the terminal.
In order to ensure the reliability of feedback, after the terminal successfully demodulates the first data block, the base station needs to combine with a conventional feedback mechanism to determine whether retransmission is needed; one of the forms is to perform a conventional feedback method on a conventional carrier, and perform retransmission when the base station receives ACK of the first data block and NACK of the complete transmission data block.
And when the base station receives the ACK of the first data, judging whether to refer to a traditional feedback result, if so, retransmitting the data block if the demodulation result of the complete transmission data block fed back by the traditional feedback mode is NACK.
In the feedback method of this embodiment, one transmission data block may be divided into two data blocks, one of the two data blocks is selected as a demodulation reference data block (specifically, a first data block), and a feedback resource for feeding back a demodulation result of the demodulation reference data block is allocated, so that a terminal can feed back a demodulation result of the demodulation reference data block through the feedback resource immediately after demodulating the demodulation reference data block; the demodulation result does not need to be fed back after the whole transmission data block is demodulated, compared with the prior art, the feedback time delay can be shortened, further, the speed of data transmission of the base station can be increased due to the shortened feedback time delay, the time from debugging the system to stable data transmission is shortened, and the throughput of the system is increased.
In order to enable the terminal to know the locations of the data transmission resource and the feedback resource of the service data, so as to perform feedback quickly, this embodiment further includes, before step 103:
acquiring first resource indication information for indicating the position of the data transmission resource and second resource indication information for indicating the position of the feedback resource;
and sending the first resource indication information and the second resource indication information to the terminal in one scheduling unit.
In this embodiment, the first resource indication information and the second indication information may be generated by the base station itself or acquired by the base station from other devices.
On the terminal side, after receiving the first resource indication information and the second resource indication information, the terminal may determine a data transmission resource location for transmitting the data block according to the first resource indication information, and determine a location of the feedback resource according to the second resource indication information.
In this embodiment, the first resource indication information and the second resource indication information may be sent to the terminal through 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).
As shown in fig. 3, the present embodiment further provides another feedback method, which is applied to a base station, and includes the following steps:
step 301: a transmission data block is divided into a first data block and a second data block.
Step 302: and allocating feedback resources for feeding back the demodulation result of the first data block to the terminal, and allocating data transmission resources for the transmission data block.
For example, in practical application, the base station learns the propagation delay of the terminal in the connected state, the terminal reports the demodulation processing capability, the base station determines the time for completing demodulation of the first data packet based on the propagation delay and the demodulation processing capability of the terminal, determines the position of the ACK/NACK resource according to the time, and allocates the ACK/NACK resource according to the position.
Wherein the analyzed feedback resource may be located on a low band carrier, e.g., an LTE carrier, or on a high band carrier.
Step 303: acquiring first resource indication information for indicating the position of the data transmission resource and second resource indication information for indicating the position of the feedback resource.
Specifically, in this embodiment, the first resource indication information may be control information for indicating the arrival of a transmission data block.
Step 304: informing the terminal that the transmission data block is divided into a first data block and a second data block.
Specifically, the terminal is notified that the transmission data block includes a first data block and a second data block through broadcasting, a control channel, a high-level signaling or an appointed mode, wherein the broadcasting can be carried on a high-frequency band carrier or a low-frequency band carrier.
Step 305: and sending the first resource indication information and the second resource indication information to the terminal in a scheduling unit.
Specifically, the first resource indication information and the second resource indication information may be transmitted through a high band carrier or a low band carrier.
Step 306: and sequentially sending the first data block and the second data block to the terminal through the data transmission resource in the scheduling unit.
Specifically, the transmission data block may be sent to the terminal through a high frequency carrier corresponding to the data transmission resource.
Step 307: and receiving a demodulation result of the first data block fed back by the terminal through the feedback resource.
Specifically, the ACK/NACK fed back by the terminal through the feedback resource may be received. For example, receiving ACK/NACK fed back by the terminal in the process of transmitting the second data block.
Step 308: when the terminal fails to demodulate the first data block, retransmitting the first data block and the second data block; and when the terminal successfully demodulates the first data block, scheduling the subsequent transmission data block of the terminal.
When the base station receives the demodulation feedback of the first data block as ACK, the base station considers that the subsequent demodulation data block should be the ACK occurring at a large probability, and the transmission adjustment mechanism is that the base station continues to schedule the subsequent data block of the terminal;
if the feedback that the base station receives the demodulation reference data block is NACK, the adjustment transmission mechanism of the base station is: keeping the transmission mode of the subsequent demodulation data block of the current transmission unchanged, and immediately retransmitting the data block of the current scheduling if the next scheduling unit has transmission resources.
Example two:
as shown in fig. 4, the present embodiment provides a feedback method, applied to a terminal, including the following steps:
step 401: and sequentially receiving a first data block and a second data block sent by a base station in a scheduling unit, wherein the first data block and the second data block are obtained by dividing a transmission data block by the base station.
Before this step, the method of this embodiment may further include: learning the transmission data block includes: the first data block and the second data block, i.e. the transmission data block, are divided into a first data block and a second data block.
Step 402: and demodulating the first data block, and feeding back a demodulation result of the first data block to the base station through a feedback resource allocated by the base station.
The feedback method of the embodiment can immediately report the demodulation result to the base station through the feedback resource after the terminal demodulates the first data block in the transmission data block, and does not need to report the demodulation result at intervals after the demodulation of the whole transmission data block is completed, thereby shortening the feedback time delay and improving the data transmission rate.
Before step 401, the method of this embodiment may further include: receiving first resource indication information and second resource indication information sent by a base station, wherein the first resource indication information is used for indicating the position of data transmission resources of the transmission data block, and the second resource indication information is used for indicating the position of the feedback resources;
in this case, the step of receiving the transmission data block transmitted by the base station in step 401 includes:
sequentially acquiring a first data block and a second data block sent by a base station from corresponding data transmission resources according to the determined position of the data transmission resources;
in the step 402, the step of feeding back the demodulation result of the first data block to the base station through the feedback resource allocated by the base station includes:
and acquiring corresponding feedback resources according to the determined positions of the feedback resources, and feeding back the demodulation result of the first data block to the base station through the feedback resources.
On the basis of the above method, the method of this embodiment may further include:
and when the first data block is successfully or unsuccessfully demodulated, continuing demodulating the second data block.
Preferentially, when the first data block is successfully demodulated and the second data block is unsuccessfully demodulated, the base station is triggered to retransmit the transmission data block through an MAC layer or a layer above the MAC layer;
or
And informing a secondary base station of the base station to retransmit the transmission data block.
As shown in fig. 5, the present embodiment provides another feedback method, which is applied to a terminal, and includes the following steps:
step 501: a transmission data block is partitioned into a first data block and a second data block.
Specifically, it is known that the transmission data block includes a first data block and a second data block through a broadcast channel, a control channel, or an appointed manner.
Step 502: receiving first resource indication information and second resource indication information sent by a base station, wherein the first resource indication information is used for indicating the position of data transmission resources of the transmission data block, and the second resource indication information is used for indicating the position of the feedback resources.
Specifically, the first resource indication information of the present embodiment may be control information for indicating data arrival.
Step 503: and determining the position of the data transmission resource of the transmission data block according to the first resource indication information, and determining the position of the feedback resource according to the second resource indication information.
Step 504: and sequentially acquiring the first data block and the second data block sent by the base station from the corresponding data transmission resources according to the determined positions of the data transmission resources.
Step 505: and demodulating the first data block, acquiring corresponding feedback resources according to the determined positions of the feedback resources, and feeding back the demodulation result of the first data block to the base station through the feedback resources.
Step 506: and when the first data block is successfully or unsuccessfully demodulated, continuing demodulating the second data block.
When the first data block is successfully demodulated and the second data block is unsuccessfully demodulated, continuing demodulating the second data block, and triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC layer, or informing a secondary base station of the base station to retransmit the transmission data block.
When the demodulation of the first data block fails, continuing demodulating a second data block, and storing the demodulated transmission data block;
and demodulating the first data block and the second data block retransmitted by the base station in a next scheduling unit, and if the first data block and the second data block are successfully demodulated, combining the demodulated transmission data with the previously stored demodulated transmission data.
Example three:
the present embodiment describes the feedback method of the present invention by taking an example that the terminal is notified in a broadcast manner 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.
And the base station informs the terminal of a transmission data block comprising a first data block and a second data block through a broadcast channel on the lte carrier, 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 not changed, and the first data block and the second data block are retransmitted at the current time in a next scheduling unit. The base station transmits control information for indicating data arrival through the lte carrier, and the base station indicates a feedback resource through the control information of the lte carrier, wherein the feedback resource is located in the high-frequency carrier.
The terminal sends a detection 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 detection signal or the access signal;
and the terminal reports the demodulation time overhead of the terminal demodulating the first data block and the package time overhead of the ACK/NACK to the base station.
The base station determines the time difference between the distributed service data and the feedback resource according to the first data block demodulation time and the ACK/NACK group packing time reported by the terminal; as shown in fig. 6, the feedback resources are allocated on the high frequency carrier, and the control information indicating the data arrival and the feedback resource allocation (i.e. the indication information indicating the positions of the data transmission resources and the feedback resources) is carried on the conventional carrier, for example, the lte carrier; in fig. 6, the base station receives the demodulation capability level fed back by the terminal, the base station determines the propagation delay between the base station and the terminal according to the signal or the channel sent by the terminal, the base station determines (estimates) the time required by the terminal to demodulate the first data block based on the demodulation capability level fed back by the terminal, and the base station determines the preferred time for the terminal to report the demodulation result of the first data block according to the propagation delay and the time required by the terminal to demodulate the first data block, thereby allocating the resource for feedback to the terminal; in fig. 6, Create Ack msg indicates the time when the Ack message is created.
The terminal in a connection state reads a broadcast channel of the base station to know that a transmission scheme cannot be changed in a subsequent part of a second data block when a feedback result of a first data block is NACK, the terminal detects control information on a lte carrier, acquires a message of service data arrival and a feedback resource for feeding back a demodulation result from the control information, receives service data from a high-frequency carrier, demodulates the first data block of the service data to judge that the demodulation result is NACK, and feeds back NACK on the feedback resource of the corresponding data block.
And the base station receives the NACK fed back by the first data, considers that the data block transmitted this time cannot be demodulated correctly, does not change a data transmission mechanism in the data scheduling time of this time, and retransmits the data block in the adjacent data transmission unit. Control information for indicating data arrival and control information for allocating feedback resources during retransmission are still transmitted on the lte carrier.
And after the terminal feeds back the NACK, continuing the subsequent data demodulation of the current transmission unit, and caching the demodulation result of the current time. The terminal detects a control channel in an adjacent scheduling unit, determines resource allocation and resource for feedback of a retransmission data block by reading the control channel, and retransmits and combines the last cached data and the current demodulated data. The terminal performs retransmission, the final data block demodulation result is ACK, and the terminal sends ACK on the feedback resource position to complete the transmission of the data block.
Example four:
in this embodiment, the feedback method of the present invention is described by taking an example that a terminal is notified in a high-layer signaling manner that a transmission data block includes a first data block and a second data block, and a feedback resource is located on an lte carrier.
And the base station informs the terminal of a transmission data block comprising a first data block and a second data block through a high-level signaling on the lte carrier, 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 not changed, and the first data block and the second data block are retransmitted at the current time in a next scheduling unit. And the base station transmits control information for indicating data arrival through the lte carrier, and the base station indicates resources for feedback through the control information of the lte carrier, wherein the resources for feedback are located in the lte carrier.
The terminal sends a detection 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 detection signal or the access signal;
and the terminal reports the demodulation time of the terminal for demodulating the first data block and the group packing time of the ACK/NACK to the base station.
The base station determines the time difference between the allocated service data and the feedback resource according to the demodulation time of the first data block, the ACK/NACK packet packing time and the propagation delay reported by the terminal, as shown in fig. 7, the feedback resource is allocated on an lte carrier, and specifically, the base station allocates a demodulation result satisfying the requirements of the propagation time, the demodulation time and the ACK packet packing time overhead on an lte uplink carrier for the first data block; fig. 7 shows that control information indicating data arrival and feedback resource allocation (i.e. indication information indicating locations of data transmission resources and feedback resources) is carried on a conventional carrier, e.g. an lte carrier; fig. 7 shows that the base station receives the demodulation capability level fed back by the terminal, the base station determines the propagation delay between the base station and the terminal according to the signal or the 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 fed back by the terminal, and the base station determines the preferred time for the terminal to report the demodulation result of the first data block according to the propagation delay and the time required for the terminal to demodulate the first data block, thereby allocating the resource for feedback to the terminal; the Decode & create ACK & propagation delay in fig. 7 represents the sum of the time to demodulate the first data block, the time to create ACK, and the propagation delay.
The terminal in a connection state reads a broadcast channel of the base station to know that a transmission scheme cannot be changed by a subsequent part of the second data block when a feedback result of the first data block is NACK, detects control information on a lte carrier, and obtains a message of service data arrival and feedback resources for feeding back a demodulation result from the control information, wherein the resources for feedback are on the lte carrier. And the terminal receives the service data from the high-frequency carrier, demodulates the first data block of the service data, judges the demodulation result to be NACK, and sends the NACK on the lte carrier feedback resource.
And the base station receives the NACK fed back by the first data, considers that the data block transmitted this time cannot be correctly demodulated by the terminal, does not change a data transmission mechanism in the data transmission unit of this time, and retransmits the data block in the adjacent data transmission unit. Control information for indicating data arrival and control information for indicating feedback resources in the retransmission process are still transmitted on the lte carrier.
And after the terminal feeds back the NACK, continuing the subsequent data demodulation of the current transmission unit, and caching the demodulation result of the current time. The terminal detects a control channel in an adjacent scheduling unit, determines resource allocation and resource for feedback of a retransmission data block by reading the control channel, and retransmits and combines the last cached data and the current demodulated data. The terminal performs retransmission, the final data block demodulation result is ACK, and the terminal sends ACK on the feedback resource position to complete the transmission of the data block.
Example five:
in this embodiment, the feedback method of the present invention is described by taking an example that the terminal is notified in a control channel 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.
And informing the terminal that one transmission data block comprises a first data block and a second data block through the control message, and retransmitting the first data block and the second data block of the current transmission unit in the next scheduling unit when the demodulation result of the first data block is NACK and the subsequent transmission mechanism of the second data block is not changed. The control message informs the service data of the arrival and the resource for feedback, and the control message is carried on the lte carrier. Downlink service data are transmitted through a high-frequency band carrier, and ACK/NACK of the service data are fed back through the high-frequency carrier.
The terminal sends a detection 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 detection signal or the access signal;
and the terminal reports the demodulation time of the terminal for demodulating the first data block and the group packing time of the ACK/NACK to the base station.
A base station determines a time difference between allocated service data and feedback resources according to a first data block demodulation time, an ACK/NACK packet packing time and a propagation delay reported by a terminal, as shown in fig. 6, the feedback resources are allocated on a high-frequency carrier, and control information indicating data arrival and feedback resource allocation (i.e., indication information indicating positions of data transmission resources and feedback resources) is carried on a conventional carrier, such as an lte carrier; in fig. 6, the base station receives the demodulation capability level fed back by the terminal, the base station determines the propagation delay between the base station and the terminal according to the signal or the channel sent by the terminal, the base station determines (estimates) the time required by the terminal to demodulate the first data block based on the demodulation capability level fed back by the terminal, and the base station determines the preferred time for the terminal to report the demodulation result of the first data block according to the propagation delay and the time required by the terminal to demodulate the first data block, thereby allocating the resource for feedback to the terminal.
And the terminal detects the control information on the lte carrier, the terminal in the connection state detects the control information to know that the transmission scheme cannot be changed by the subsequent part of the second data block when the feedback result of the first data block is NACK, and the service data reaches and feeds back the feedback resource for the demodulation result from the control information, wherein the resource for feedback is on the high-frequency carrier. And the terminal receives the service data from the high-frequency carrier, demodulates the first data block of the service data, judges the demodulation result to be NACK, and sends the NACK on the resource for feedback corresponding to the high-frequency carrier.
And the base station receives the NACK fed back by the first data, considers that the data block transmitted this time cannot be correctly demodulated by the terminal, does not change a data transmission mechanism in the data transmission unit of this time, and retransmits the data block in the adjacent data transmission unit. Control information for indicating data arrival and control information for indicating feedback resources in the retransmission process are still transmitted on the lte carrier.
And after the terminal feeds back the NACK, continuing the subsequent data demodulation of the current transmission unit, and caching the demodulation result of the current time. The terminal detects a control channel in an adjacent scheduling unit, determines resource allocation and resource for feedback of a retransmission data block by reading the control channel, and retransmits and combines the last cached data and the current demodulated data. The terminal performs retransmission, the final data block demodulation result is ACK, and the terminal sends ACK on the feedback resource position to complete the transmission of the data block.
Example six:
in this embodiment, a feedback method of the present invention is described by taking an example that a terminal is informed in an agreed manner that a transmission data block includes a first data block and a second data block, and a feedback resource is located on a high frequency band carrier
And appointing a transmission data block to comprise a first data block and a second data block, and retransmitting the first data block and the second data block of the current transmission unit in the next scheduling unit when the demodulation result of the first data block is NACK and the subsequent transmission mechanism of the second data block is not changed. And the control message informs the service data of reaching the position of the feedback resource, and the control message is carried on the lte carrier. Downlink service data are transmitted through a high-frequency band carrier, and ACK/NACK of the service data are fed back through the high-frequency carrier.
The terminal sends a detection 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 detection signal or the access signal;
and the terminal reports the demodulation time of the terminal for demodulating the first data block and the group packing time of the ACK/NACK to the base station.
The base station determines the time difference between the allocated service data and the feedback resource according to the demodulation time of the first data block, the ACK/NACK packet packing time and the propagation delay reported by the terminal, as shown in fig. 6 (the feedback resource is allocated on a high-frequency carrier, and control information indicating data arrival and feedback resource is carried on a lte carrier).
The terminal detects the control information on the lte carrier, and the terminal in the connection state learns the service data arrival and the feedback resource for feeding back the demodulation result from the control information, wherein the resource for feeding back is on the high-frequency carrier. The terminal receives the service data from the high-frequency carrier, the terminal demodulates the first data block of the service data to judge that the demodulation result is NACK, and the NACK is sent on the resource of the high-frequency carrier.
And the base station receives the NACK fed back by the first data, considers that the data block transmitted this time cannot be correctly demodulated by the terminal, does not change a data transmission mechanism in the data transmission unit of this time, and retransmits the data block in the adjacent data transmission unit. Control information for indicating data arrival and control information for indicating feedback resources in the retransmission process are still transmitted on the lte carrier.
And after the terminal feeds back the NACK, continuing the subsequent data demodulation of the current transmission unit, and caching the demodulation result of the current time. The terminal detects a control channel in an adjacent scheduling unit, determines resource allocation and resource for feedback of a retransmission data block by reading the control channel, and retransmits and combines the last cached data and the current demodulated data. The terminal performs retransmission, the final data block demodulation result is ACK, and the terminal sends ACK on the feedback resource position to complete the transmission of the data block.
The understanding of the demodulation result of the first data block by the terminal and the base station is embodied in the embodiment as follows:
1) informing in a broadcast mode, wherein the broadcast message at the moment is the same processing mode for all terminals in the cell;
2) informing by a control channel mode, namely after different terminals in a cell send the demodulated data of the first data block, the base station carries out different processing modes aiming at the different terminals;
3) and informing through a high-level signaling mode, if the service type or the transmission scene of the terminal is suitable for quick feedback, and informing through the high-level signaling. This approach is less costly than broadcasting, requires only one notification, and is terminal-specific.
The feedback method of the embodiment is used for indicating the demodulation condition of the first data block, and when the terminal can correctly demodulate the data of the first data block, the terminal will demodulate the subsequent data at a large rate, so that the ACK fast feedback is performed at a large probability; and when the terminal demodulates the first data block into NACK, continuing the current transmission mechanism, and retransmitting the data in the subsequent data transmission unit to improve the demodulation SINR of the data.
Example seven:
as shown in fig. 8, the present embodiment provides a feedback apparatus applied to a base station, including: the device comprises a dividing module, a resource allocation module, a sending module, a receiving module and a processing module;
the dividing module is used for dividing a transmission data block into a first data block and a second data block;
the resource allocation module is configured to allocate a feedback resource for feeding back the demodulation result of the first data block to a terminal, and allocate a data transmission resource for the transmission data block;
the sending module is configured to 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 receiving module is configured to receive a demodulation result of the first data block fed back by the terminal through the feedback resource;
and the processing module is used for carrying out corresponding data sending processing according to the demodulation result.
Preferably, the relationship between the first data block and the second data block comprises at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
As shown in fig. 9, on the basis of the above, the feedback apparatus further includes: an indication information acquisition module;
the indication information acquisition module is configured to acquire first resource indication information used for indicating a location of the data transmission resource and second resource indication information used 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 transmission data block to the terminal.
The feedback device can shorten the feedback time delay of the system and improve the data transmission speed.
Example eight:
as shown in fig. 10, the present embodiment provides a feedback apparatus applied to a terminal, including: the device comprises a receiving module and a demodulation feedback module;
the receiving module is configured to sequentially receive a first data block and a second data block sent by a base station in a scheduling unit, where the first data block and the second data block are obtained by dividing a transmission data block by the base station;
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 through the feedback resource allocated by the base station.
Preferably, as shown in fig. 11, the feedback device of the present 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 when the demodulation of the first data block fails, continuing to demodulate the second data block, and if the demodulation of the second data block fails, triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC layer, or informing a base station of the base station to retransmit the transmission data block.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (18)

1. A feedback method is applied to a base station and comprises the following steps:
dividing a transmission data block into a first data block and a second data block;
allocating feedback resources for feeding back the demodulation result of the first data block to a terminal, and allocating data transmission resources for the transmission data block;
sequentially sending the first data block and the second data block to the terminal through the data transmission resource in a scheduling unit;
receiving a demodulation result of the first data block fed back by the terminal through the feedback resource;
carrying out corresponding data sending processing according to the demodulation result;
wherein the relationship between the first data block and the second data block comprises at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
2. The feedback method of claim 1, wherein after dividing one transmission data block into a first data block and a second data block before transmitting the transmission data block to the terminal through the data transmission resource, the method further comprises:
informing the terminal that the transmission data block is divided into a first data block and a second data block.
3. The feedback method according to any of claims 1-2, wherein said step of performing corresponding data transmission processing according to the demodulation result comprises:
when the terminal fails to demodulate the first data block, retransmitting the first data block and the second data block;
and when the terminal successfully demodulates the first data block, scheduling the subsequent transmission data block of the terminal.
4. The feedback method of claim 3, wherein the step of retransmitting the first and second data blocks comprises:
and retransmitting the first data block and the second data block in a next scheduling unit.
5. The feedback method of claim 1, wherein the step of allocating feedback resources for the terminal to demodulate the first data block comprises:
determining the position of a feedback resource of the demodulation result of the first data block by the terminal;
and allocating the feedback resources to the terminal according to the determined position.
6. The feedback method of claim 5, wherein the step of determining the location of the feedback resource for the terminal to demodulate the first data block comprises:
acquiring the propagation delay of the terminal and the demodulation processing capacity of the terminal on data;
and determining the position of a feedback resource of the demodulation result of the first data block by the terminal according to the propagation delay and the demodulation processing capacity.
7. The feedback method according to any of claims 1-2, wherein prior to transmitting the transmission data block to the terminal over the data transmission resource, the method further comprises:
acquiring first resource indication information for indicating the position of the data transmission resource and second resource indication information for indicating the position of the feedback resource;
and sending the first resource indication information and the second resource indication information to the terminal in one scheduling unit.
8. The method of claim 7, wherein the step of transmitting the first resource indication information and the second resource indication information to the terminal comprises:
and sending the first resource indication information and the second resource indication information to the terminal through the high-frequency band carrier or the low-frequency band carrier.
9. A feedback method is characterized in that the feedback method is applied to a terminal and comprises the following steps:
sequentially receiving a first data block and a second data block sent by a base station in a scheduling unit, wherein the first data block and the second data block are obtained by dividing a transmission data block by the base station;
demodulating the first data block, and feeding back a demodulation result of the first data block to the base station through a feedback resource allocated by the base station;
wherein the relationship between the first data block and the second data block comprises at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
10. The feedback method of claim 9, wherein prior to receiving the transmission data block transmitted by the base station, the feedback method further comprises:
learning that a transmission data block is partitioned into the first data block and the second data block.
11. The feedback method of claim 9, wherein prior to receiving the transmission data block transmitted by the base station, the feedback method further comprises:
receiving first resource indication information and second resource indication information sent by a base station, wherein the first resource indication information is used for indicating the position of data transmission resources of the transmission data block, and the second resource indication information is used for indicating the position of the feedback resources;
determining the position of the data transmission resource of the transmission data block according to the first resource indication information, and determining the position of the feedback resource according to the second resource indication information;
the step of sequentially receiving the first data block and the second data block sent by the base station in one scheduling unit includes:
sequentially acquiring the first data block and the second data block sent by the base station from the corresponding data transmission resources according to the determined position of the data transmission resources;
the step of feeding back the demodulation result of the first data block to the base station through the feedback resource allocated by the base station includes:
and acquiring corresponding feedback resources according to the determined positions of the feedback resources, and feeding back the demodulation result of the first data block to the base station through the feedback resources.
12. A feedback method according to any of claims 9-11, wherein the feedback method further comprises:
and when the first data block is successfully or unsuccessfully demodulated, continuing demodulating the second data block.
13. The feedback method of claim 12, wherein when demodulating the first data is successful, after continuing to demodulate the second data block, the method further comprises:
and if the second data block is failed to be demodulated, triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC, or informing a secondary base station of the base station to retransmit the transmission data block.
14. The feedback method of claim 12, wherein when demodulating the first data block fails, after continuing to demodulate the second data block, the method further comprises:
storing the demodulated transmission data;
and demodulating the first data block and the second data block retransmitted by the base station in a next scheduling unit, and if the first data block and the second data block are successfully demodulated, combining the demodulated transmission data with the previously stored demodulated transmission data.
15. A feedback apparatus, applied to a base station, comprising: the device comprises a dividing module, a resource allocation module, a sending module, a receiving module and a processing module;
the dividing module is used for dividing a transmission data block into a first data block and a second data block;
the resource allocation module is configured to allocate a feedback resource for feeding back the demodulation result of the first data block to a terminal, and allocate a data transmission resource for the transmission data block;
the sending module is configured to 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 receiving module is configured to receive a demodulation result of the first data block fed back by the terminal through the feedback resource;
the processing module is used for carrying out corresponding data sending processing according to the demodulation result;
wherein the relationship between the first data block and the second data block comprises at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
16. The feedback apparatus of claim 15, wherein the feedback apparatus further comprises: an indication information acquisition module;
the indication information acquisition module is configured to acquire first resource indication information used for indicating a location of the data transmission resource and second resource indication information used 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 transmission data block to the terminal.
17. A feedback device, applied to a terminal, includes: the device comprises a receiving module and a demodulation feedback module;
the receiving module is configured to sequentially receive a first data block and a second data block sent by a base station in a scheduling unit, where the first data block and the second data block are obtained by dividing a transmission data block by the base station;
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 through a feedback resource allocated by the base station;
wherein the relationship between the first data block and the second data block comprises at least one of:
the modulation order of the first data block is equal to or higher than the modulation order of the second data block;
the original bit number of the first data block is less than or equal to the original bit number 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.
18. The feedback apparatus of claim 17, further comprising: a processing module;
the processing module is configured to continue demodulating the second data block when the first data block is successfully demodulated; and when the demodulation of the first data block fails, continuing to demodulate the second data block, and if the demodulation of the second data block fails, triggering the base station to retransmit the transmission data block through an MAC layer or a layer above the MAC layer, or informing a base station of the base station to retransmit the transmission data block.
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