CN111294161B - HARQ feedback method and device, storage medium and terminal - Google Patents

HARQ feedback method and device, storage medium and terminal Download PDF

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CN111294161B
CN111294161B CN201910142227.2A CN201910142227A CN111294161B CN 111294161 B CN111294161 B CN 111294161B CN 201910142227 A CN201910142227 A CN 201910142227A CN 111294161 B CN111294161 B CN 111294161B
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data block
harq feedback
pdsch
feedback information
received
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CN111294161A (en
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张书园
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Abstract

A HARQ feedback method and device, a storage medium and a terminal are provided, the method comprises the following steps: when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined; and if the PDSCH of the first data block is not received, not sending HARQ feedback information. The scheme of the invention can improve the accuracy of the decoding of the receiving end.

Description

HARQ feedback method and device, storage medium and terminal
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a HARQ feedback method and apparatus, a storage medium, and a terminal.
Background
In a Long Term Evolution (LTE) system, a transmitting side of a data transmission process notifies a receiving side whether current data is correctly received through feedback of a Hybrid Automatic Repeat reQuest (HARQ) process. If not, the data decoding gain is ensured through retransmission, and the decoding success rate is improved. Among them, the HARQ technique may include soft combining (CC) combining and Incremental Redundancy (IR) combining.
In the existing IR combining technology, a sending end sends a first data block and a second data block to a receiving end, and then the receiving end performs HARQ feedback on the first data block and the second data block.
Specifically, in the initial transmission, the sending end sends the data part and the check part of the first data block and the second data block to the receiving end, and then determines whether to retransmit according to the HARQ feedback information of the receiving end.
In retransmission, the sending end can default that the receiving end has received the data part, so that only the check bits which are not sent in initial transmission can be retransmitted, the receiving end can obtain redundant information as much as possible in decoding, and the success rate of error correction and decoding is improved.
However, if the receiving end does not receive the data part in the initial transmission, the receiving end cannot independently and correctly decode the data because the retransmission does not include the data part, and even can only decode the data by a blind solution method, which increases the error rate.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a HARQ feedback method and device, a storage medium and a terminal, which can improve the accuracy of decoding correctness at a receiving end.
In order to solve the above technical problem, an embodiment of the present invention provides an HARQ feedback method, including the following steps: when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined; and if the PDSCH of the first data block is not received, not sending HARQ feedback information.
Optionally, the HARQ feedback method further includes: determining whether a PDSCH of the second data block is received; and if the PDSCH of the first data block is received and the PDSCH of the second data block is not received, transmitting HARQ feedback information by adopting a first resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 0.
Optionally, the HARQ feedback method further includes: if the PDSCH of the first data block and the PDSCH of the second data block are received, judging whether the PDSCH of the first data block and the PDSCH of the second data block are decoded correctly; and sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly or not.
Optionally, the sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly includes: and if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded correctly, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 1.
Optionally, if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded correctly, the second resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 1 and bit1 is 1. And if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded incorrectly, transmitting HARQ feedback information by adopting a first resource, wherein the 0 th bit of the HARQ feedback information is 0, and the 1 st bit of the HARQ feedback information is 1.
Optionally, the sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly includes: and if the PDSCH of the first data block is decoded incorrectly and the PDSCH of the second data block is decoded correctly, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 0, and the 1 st bit of the HARQ feedback information is 0.
Optionally, the sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly includes: and if the PDSCH of the first data block is in decoding error and the PDSCH of the second data block is in decoding error, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 0.
To solve the above technical problem, an embodiment of the present invention provides an HARQ feedback apparatus, including: an HARQ feedback apparatus, comprising: a feedback module adapted to not transmit HARQ feedback information when the PDSCH of the first data block is not received.
To solve the above technical problem, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the HARQ feedback method are executed.
In order to solve the above technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the HARQ feedback method when executing the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined; and if the PDSCH of the first data block is not received, not sending HARQ feedback information. By adopting the scheme, when the PDSCH of the first data block is not received, HARQ feedback information is not sent no matter whether the PDSCH of the second data block is received or not, so that the sending end can determine that the receiving end cannot receive the data parts of the first data block and the second data block when the sending end cannot receive the feedback, and the data parts and the check parts of the first data block and the second data block are retransmitted according to the regulations in the existing protocol, thereby improving the correct decoding rate of the receiving end.
Further, by setting that when the PDSCH of the first data block is received and the PDSCH of the second data block is not received, the first resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 1, and bit1 is 0, it may be determined that the receiving end and the data portion of the second data block cannot be received even if the transmitting end receives bit0 of 1 on the first resource, and bit1 is 0, so as to retransmit the check portion of the first data block and retransmit both the data portion and the check portion of the second data block according to the rules in the existing protocol, thereby improving the correct decoding rate of the receiving end.
Further, when the PDSCH of the first data block and the PDSCH of the second data block are received, HARQ feedback information is sent according to whether the PDSCH of the first data block and the PDSCH of the second data block is decoded correctly, so that a proper retransmission mode can be selected more accurately, and the correct decoding rate of a receiving end is improved on the basis of transmitting as little data as possible.
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Fig. 1 is a flowchart of a HARQ feedback method in an embodiment of the present invention;
fig. 2 is a partial flow chart of another HARQ feedback method in an embodiment of the present invention;
fig. 3 is a partial flowchart of a HARQ feedback method according to another embodiment of the present invention;
FIG. 4 is a flowchart of one embodiment of step S32 of FIG. 3;
fig. 5 is a schematic structural diagram of an HARQ feedback apparatus according to an embodiment of the present invention.
Detailed Description
As described above, in the existing IR combining technology, the transmitting end transmits the first data block and the second data block to the receiving end, and then the receiving end performs HARQ feedback on the first data block and the second data block. Specifically, in the initial transmission, the sending end sends the data part and the check part of the first data block and the second data block to the receiving end, and then determines whether to retransmit according to the HARQ feedback information of the receiving end.
Referring to table 1, table 1 is a HARQ feedback Transmission (HARQ-ACK) table in the prior art.
TABLE 1
Figure BDA0001978896060000041
Table 1 is from protocol 36.213, and is a case where the same sender sends a first data block and a second data block to a receiver, where the first data block and the second data block are independent of each other.
In the existing protocol, the actual receiving condition at the receiving end may be that a Physical Downlink Shared Channel (PDSCH) is decoded in error (0 ═ NACK), that the decoding is correct (1 ═ ACK), or that the PDSCH is not received (2 ═ DTX).
It should be noted that, in the existing protocol, the HARQ feedback information defined does not distinguish between the HARQ feedback information of the initial transmission and the HARQ feedback information of the retransmission, and does not distinguish between NACK/DTX situations on the feedback information, so as to save air interface resources.
As shown in table 1, when the receiving end performs HARQ feedback on the first data block and the second data block, predefined HARQ feedback information is fed back on corresponding resources according to whether PDSCH of the two data blocks is received.
Wherein the corresponding resource
Figure BDA0001978896060000051
May include a first resource
Figure BDA0001978896060000052
And a second resource
Figure BDA0001978896060000053
The predefined HARQ feedback information may be represented in two bits, e.g., bit0 (bit0) and bit1 (bit 1).
Specifically, if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded correctly, the second resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 1 and bit1 is 1.
In a specific implementation, when the 0 th bit received by the transmitting end on the second resource is 1 and the 1 st bit is 1, it is determined that the receiving end has correctly decoded two data blocks, and retransmission is not needed.
Specifically, if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded incorrectly or not received, the HARQ feedback information is sent using the first resource, where bit0 of the HARQ feedback information is 0 and bit1 of the HARQ feedback information is 1.
In specific implementation, when a 0 th bit received by a sending end on a first resource is 0 and a 1 st bit is 1, it is determined that a receiving end has correctly decoded a first data block, and retransmission is not needed; however, for the second data block, it is difficult for the transmitting end to determine whether the receiving end has received the data portion and failed in decoding, or whether the receiving end has not received the data portion.
The inventor of the present invention has found through research that, in the prior art, a transmitting end retransmits only a check portion of a second data block according to the specification in the existing protocol, but does not retransmit a data portion, and when a receiving end does not receive the data portion, the receiving end cannot independently and correctly decode the data because the retransmission does not include the data portion, or even can only decode the data by a blind solution method, so that the error rate is increased.
Specifically, if the PDSCH of the first data block is decoded incorrectly or not received and the PDSCH of the second data block is decoded correctly, the second resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 0 and bit1 is 0.
In specific implementation, when the 0 th bit received by the sending end on the second resource is 0 and the 1 st bit is 0, it is determined that the receiving end has correctly decoded the second data block, and retransmission is not needed; however, for the first data block, it is difficult for the transmitting end to determine whether the receiving end has received the data portion and failed in decoding, or whether the receiving end has not received the data portion.
The inventor of the present invention has found through research that, in the prior art, a transmitting end retransmits only the check portion of the first data block according to the specification in the existing protocol, but does not retransmit the data portion, and when a receiving end does not receive the data portion, the receiving end cannot independently and correctly decode the data because the retransmission does not include the data portion, or even can only decode the data by a blind solution method, so that the error rate is increased.
Specifically, if the PDSCH of the first data block is decoded incorrectly or not received, and the PDSCH of the second data block is decoded incorrectly, the second resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 1, and bit1 is 0.
In a specific implementation, when the 0 th bit received by the sending end on the second resource is 1, and the 1 st bit is 0, for the first data block, it is difficult for the sending end to determine whether the receiving end has received the data part but fails in decoding, or the receiving end does not receive the data part; for the second data block, the transmitting end may determine that the receiving end has received the data portion and failed to decode.
The inventor of the present invention has found through research and research that, in the prior art, a transmitting end retransmits only the parity portions of the first data block and the second data block, but does not retransmit the data portions, according to the provisions in the prior protocol.
Specifically, when the receiving end does not receive the data portion of the first data block, the receiving end cannot independently and correctly decode the data because the retransmission does not include the data portion of the first data block, and even can only decode the data by a blind solution method, so that the error rate is increased.
And if the PDSCH of the first data block is in decoding error and the PDSCH of the second data block is not received, transmitting HARQ feedback information by adopting a first resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 0.
In a specific implementation, when the sending end receives the 0 th bit of 1 and the 1 st bit of 0 on the first resource, the sending end may determine that the receiving end has received the data part and fails to decode the data part for the first data block, and may determine that the receiving end has not received the data part and the check part for the second data block, so that retransmission may be performed accurately. For example, only the parity portion of the first data block is retransmitted, and the data portion and the parity portion of the second data block are retransmitted.
And if the PDSCH of the first data block is not received and the PDSCH of the second data block is not received, not sending HARQ feedback information.
In a specific implementation, when the sending end does not receive the feedback, it is determined that the receiving end has not received the data part and the check part of the first data block and the second data block, so that retransmission can be accurately performed. For example, the data portion and the check portion of the first data block and the second data block are both retransmitted.
In the embodiment of the invention, when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined; and if the PDSCH of the first data block is not received, not sending HARQ feedback information. By adopting the scheme, when the PDSCH of the first data block is not received, HARQ feedback information is not sent no matter whether the PDSCH of the second data block is received or not, so that the sending end can determine that the receiving end cannot receive the data parts of the first data block and the second data block when the sending end cannot receive the feedback, and the data parts and the check parts of the first data block and the second data block are retransmitted according to the regulations in the existing protocol, thereby improving the correct decoding rate of the receiving end.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, fig. 1 is a flowchart of an HARQ feedback method in an embodiment of the present invention. The HARQ feedback method may be used for a receiving end, and may include steps S11 to S12:
step S11: when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined;
step S12: and if the PDSCH of the first data block is not received, not sending HARQ feedback information.
In the implementation of step S11, it is necessary to determine whether the PDSCH of the first data block is received.
It should be noted that, compared to the prior art, it is necessary to determine both the PDSCH of the first data block and the PDSCH of the second data block, and after the reception conditions of the two data blocks are determined, the HARQ feedback information can be further determined.
In a specific implementation of step S12, when the PDSCH of the first data block is not received, it is determined not to transmit HARQ feedback information.
Further, if the second data block is decoded correctly and the receiving end receives the retransmitted data portion and the check portion of the second data block, the retransmitted portion may be discarded.
In the embodiment of the invention, the data part and the verification part of the second data block are selected to be retransmitted by the sending end when the receiving condition and the decoding result of the second data block are not clear, which is beneficial to improving the correct decoding rate of the receiving end, and the retransmission part can be discarded after the receiving end is set to be correct in decoding, so that the abnormal flow can be simplified.
In the embodiment of the invention, when the PDSCH of the first data block is not received, HARQ feedback information is not sent no matter whether the PDSCH of the second data block is received or not, so that the sending end can determine that the receiving end cannot receive the data parts of the first data block and the second data block when the sending end cannot receive the feedback, and the data parts and the check parts of the first data block and the second data block are retransmitted according to the regulations in the existing protocol, thereby improving the correct decoding rate of the receiving end.
Referring to fig. 2, fig. 2 is a partial flowchart of another HARQ feedback method in this embodiment. The other HARQ feedback method may include steps S11 to S12 shown in fig. 1, and may further include steps S21 to S22, and each step is described below.
Step S21: determining whether a PDSCH of the second data block is received;
step S22: and if the PDSCH of the first data block is received and the PDSCH of the second data block is not received, transmitting HARQ feedback information by adopting a first resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 0.
In step S21, the receiving end may determine whether the PDSCH of the second data block is received after determining that the PDSCH of the first data block is received.
Compared with the prior art, the receiving end needs to determine both the PDSCH of the first data block and the PDSCH of the second data block, in the embodiment of the invention, the receiving end can determine whether the PDSCH of the first data block is received or not firstly and then determine whether the PDSCH of the second data block is received or not, so that the complexity and the workload of the determination step are reduced, and the judgment efficiency is improved.
In step S22, if the PDSCH of the first data block is received and the PDSCH of the second data block is not received, HARQ feedback information is sent using a first resource, where a 0 th bit of the HARQ feedback information is 1 and a 1 st bit is 0.
In a specific implementation, when the 0 th bit received by the sending end on the first resource is 1, and the 1 st bit is 0, according to the existing protocol, for the first data block, the sending end may determine that the receiving end has received the data portion and fails to decode, and for the second data block, the sending end may determine that the receiving end has not received both the data portion and the check portion, so that retransmission may be performed accurately. For example, only the parity portion of the first data block is retransmitted, and the data portion and the parity portion of the second data block are retransmitted.
It should be noted that, in the embodiment of the present invention, the sending end determines the second data block accurately, and for the first data block, there may be a possibility that decoding is successful and misjudged as decoding is failed, which results in retransmission of the check portion of the first data block.
Further, if the first data block is decoded correctly and a check portion for retransmission of the first data block is received, the retransmitted portion may be discarded.
In the embodiment of the invention, the check part of the first data block is selected to be retransmitted by setting the sending end when the decoding result of the first data block is not clear, which is beneficial to improving the correct decoding rate of the receiving end, and then the retransmission part can be discarded after the receiving end decodes correctly, thereby simplifying the abnormal flow.
In the embodiment of the present invention, when the PDSCH of the first data block is received and the PDSCH of the second data block is not received, the HARQ feedback information is sent by using the first resource, where the 0 th bit of the HARQ feedback information is 1 and the 1 st bit is 0, so that when the sending end receives the 0 th bit of 1 and the 1 st bit of 0 on the first resource, it is determined that the receiving end and the data part of the second data block cannot be received, and therefore, according to the provisions in the existing protocol, the check part of the first data block is retransmitted, and the data part and the check part of the second data block are retransmitted, so as to improve the correct decoding rate of the receiving end.
Referring to fig. 3, fig. 3 is a partial flowchart of another HARQ feedback method in an embodiment of the present invention. The still another HARQ feedback method may include steps S11 to S12 shown in fig. 1, may further include steps S21 to S22 shown in fig. 2, and may further include steps S31 to S32, which are described below.
In step S31, if the PDSCH of the first data block and the second data block is received, it is determined whether the PDSCH of the first data block and the PDSCH of the second data block is decoded correctly.
In step S32, HARQ feedback information is transmitted according to whether the PDSCH of the first data block and the second data block is decoded correctly.
In the embodiment of the present invention, before decoding the PDSCH of the first data block and the second data block, it is first determined whether to not send HARQ feedback information for the PDSCH of the first data block and the second data block, and whether to use the first resource is determined, where bit0 of sending HARQ feedback information is 1, and bit1 is 0, which is beneficial to improving efficiency.
Referring to fig. 4, fig. 4 is a flowchart of an embodiment of step S32 in fig. 3. The step of transmitting HARQ feedback information may include steps S41 to S44 according to whether the PDSCH of the first data block and the second data block is decoded correctly.
It should be noted that the numbers of steps S41 to S44 do not represent limitations on the execution order of the respective steps. The respective steps are explained below.
In step S41, if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded correctly, a second resource is used to send HARQ feedback information, where bit0 of the HARQ feedback information is 1 and bit1 of the HARQ feedback information is 1.
In a specific implementation, when the 0 th bit received by the transmitting end on the second resource is 1 and the 1 st bit is 1, it is determined that the receiving end has decoded correctly for both data blocks, and retransmission is not necessary.
In step S42, if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded incorrectly, HARQ feedback information is sent using a first resource, where bit0 of the HARQ feedback information is 0 and bit1 of the HARQ feedback information is 1.
In specific implementation, when a 0 th bit received by a sending end on a first resource is 0 and a 1 st bit is 1, it is determined that a receiving end has correctly decoded a first data block, and retransmission is not needed; for the second data block, the transmitting end is difficult to determine whether the receiving end has received the data part and has failed in decoding, or the receiving end does not receive the data part, and only the check part of the second data block is retransmitted according to the existing protocol, but the data part is not retransmitted.
In the embodiment of the invention, because the PDSCH of the second data block is in decoding error and is not received, the transmitting end only retransmits the check part of the second data block, but does not retransmit the data part, and transmission loss is not caused.
In step S43, if the PDSCH of the first data block is decoded incorrectly and the PDSCH of the second data block is decoded correctly, a second resource is used to send HARQ feedback information, where bit0 and bit1 of the HARQ feedback information are 0.
In specific implementation, when the 0 th bit received by the sending end on the second resource is 0 and the 1 st bit is 0, it is determined that the receiving end has correctly decoded the second data block, and retransmission is not needed; however, for the first data block, it is difficult for the sending end to determine whether the receiving end has received the data part and failed in decoding, or the receiving end has not received the data part, and only the parity part of the first data block is retransmitted according to the existing protocol, and the data part is not retransmitted.
In the embodiment of the invention, because the PDSCH of the first data block is in a decoding error and is not received, the transmitting end only retransmits the check part of the first data block but does not retransmit the data part, and transmission loss is not caused.
In step S44, if the PDSCH of the first data block is decoded incorrectly and the PDSCH of the second data block is decoded incorrectly, HARQ feedback information is sent using a second resource, where bit0 of the HARQ feedback information is 1 and bit1 is 0.
In a specific implementation, when a 0 th bit received by a sending end on a second resource is 1, and the 1 st bit is 0, for a first data block, the sending end is difficult to determine whether a receiving end has received a data part and fails to decode, or the receiving end does not receive the data part, and only retransmits a check part of the first data block without retransmitting the data part according to an existing protocol; for the second data block, the transmitting end may determine that the receiving end has received the data portion and fails to decode, and may retransmit only the parity portion of the second data block without retransmitting the data portion.
In the embodiment of the invention, because the PDSCHs of the first data block and the second data block are both decoded incorrectly and are not received, the transmitting end retransmits the check parts of the first data block and the second data block without retransmitting the data parts, thereby not causing transmission loss.
Referring to table 2, table 2 is a HARQ feedback transmission table in the embodiment of the present invention.
TABLE 2
Figure BDA0001978896060000121
As can be seen from table 2, in the embodiment of the present invention, for each receiving situation, a more detailed determination method is adopted, and more appropriate HARQ feedback information is sent, which is beneficial for the sending end to perform retransmission according to more appropriate HARQ feedback information on the basis of the existing protocol, and improves the correct decoding rate of the receiving end.
With reference to fig. 3, in the embodiment of the present invention, when receiving the PDSCHs of the first data block and the second data block, according to whether the PDSCHs of the first data block and the second data block are decoded correctly, HARQ feedback information is sent, so that a suitable retransmission method can be selected more accurately, and the correct decoding rate of a receiving end is improved on the basis of transmitting as little data as possible.
It should be noted that, in the embodiment of the present invention, the schemes shown in fig. 1 to fig. 4 may also be used for HARQ feedback only during initial transmission, and the scheme in the prior art is used during retransmission delay, so as to avoid too large a change from the prior art, and further help to improve the correct decoding accuracy of the receiving end on the basis of transmitting as little data as possible.
Referring to table 3, table 3 is another HARQ feedback transmission table according to an embodiment of the present invention.
TABLE 3
Figure BDA0001978896060000131
As can be seen from table 3, in the embodiment of the present invention, the initial transmission and the retransmission are distinguished, a more detailed determination method is adopted for each reception situation, and more appropriate HARQ feedback information is sent, which is helpful for the sending end to keep the scheme of the existing protocol during retransmission, and is helpful for the sending end to perform retransmission according to more appropriate HARQ feedback information on the basis of the existing protocol, so as to improve the correct decoding rate of the receiving end.
It should be noted that, for data that fails to be decoded, when the receiving end receives the same retransmission data, that is, when the Redundancy Version (RV) numbers are the same, independent decoding or CC combining decoding can be implemented, so as to improve the decoding performance.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an HARQ feedback apparatus according to an embodiment of the present invention. The HARQ feedback apparatus may include:
a determining module 51 adapted to determine whether a PDSCH of a first data block is received when HARQ feedback is performed on the first data block and a second data block;
a feedback module 52 adapted to not transmit HARQ feedback information when the PDSCH of the first data block is not received.
In the embodiment of the invention, when the PDSCH of the first data block is not received, HARQ feedback information is not sent no matter whether the PDSCH of the second data block is received or not, so that the sending end can determine that the receiving end cannot receive the data parts of the first data block and the second data block when the sending end cannot receive the feedback, and the data parts and the check parts of the first data block and the second data block are retransmitted according to the regulations in the existing protocol, thereby improving the correct decoding rate of the receiving end.
For the principle, specific implementation and beneficial effects of the HARQ feedback apparatus, please refer to the related descriptions about the HARQ feedback method shown in fig. 1 to fig. 4 and the foregoing, which are not described herein again.
An embodiment of the present invention further provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the HARQ feedback method shown in fig. 1 to 4 are executed. The storage medium may be a computer-readable storage medium, and may include, for example, a non-volatile (non-volatile) or non-transitory (non-transitory) memory, and may further include an optical disc, a mechanical hard disk, a solid state hard disk, and the like.
An embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the HARQ feedback method shown in fig. 1 to 4 when executing the computer instructions. The terminal includes, but is not limited to, a mobile phone, a computer, a tablet computer and other terminal devices.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A HARQ feedback method is characterized by comprising the following steps:
when HARQ feedback is carried out on a first data block and a second data block, whether a PDSCH of the first data block is received or not is determined;
if the PDSCH of the first data block is not received, HARQ feedback information is not sent;
determining whether a PDSCH of the second data block is received;
and if the PDSCH of the first data block is received and the PDSCH of the second data block is not received, transmitting HARQ feedback information by adopting a first resource.
2. The HARQ feedback method according to claim 1,
the 0 th bit of the HARQ feedback information is 1, and the 1 st bit is 0.
3. The HARQ feedback method of claim 1, further comprising:
if the PDSCH of the first data block and the PDSCH of the second data block are received, judging whether the PDSCH of the first data block and the PDSCH of the second data block are correctly decoded;
and sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly or not.
4. The HARQ feedback method of claim 3, wherein sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly comprises:
and if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded correctly, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 1.
5. The HARQ feedback method of claim 3, wherein sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly comprises:
and if the PDSCH of the first data block is decoded correctly and the PDSCH of the second data block is decoded incorrectly, transmitting HARQ feedback information by adopting a first resource, wherein the 0 th bit of the HARQ feedback information is 0, and the 1 st bit of the HARQ feedback information is 1.
6. The HARQ feedback method of claim 3, wherein sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly comprises:
and if the PDSCH of the first data block is in decoding error and the PDSCH of the second data block is in decoding correctness, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 0, and the 1 st bit of the HARQ feedback information is 0.
7. The HARQ feedback method of claim 3, wherein sending HARQ feedback information according to whether the PDSCH of the first data block and the second data block is decoded correctly comprises:
and if the PDSCH of the first data block is in decoding error and the PDSCH of the second data block is in decoding error, sending HARQ feedback information by adopting a second resource, wherein the 0 th bit of the HARQ feedback information is 1, and the 1 st bit of the HARQ feedback information is 0.
8. An HARQ feedback apparatus, comprising:
a determining module adapted to determine whether a PDSCH of a first data block is received when HARQ feedback is performed on the first data block and a second data block;
a feedback module adapted to not transmit HARQ feedback information when the PDSCH of the first data block is not received;
the device further comprises:
a second data block determination module, configured to determine whether the PDSCH of the second data block is received after determining whether the PDSCH of the first data block is received;
and the sending module is used for sending the HARQ feedback information by adopting the first resource when the PDSCH of the first data block is received and the PDSCH of the second data block is not received.
9. A storage medium having stored thereon computer instructions, characterized in that the computer instructions are operable to perform the steps of the HARQ feedback method according to any of claims 1 to 7.
10. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the HARQ feedback method of any one of claims 1 to 7.
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