WO2019144833A1

WO2019144833A1 - Indication method for dai, and user terminal and network side device

Info

Publication number: WO2019144833A1
Application number: PCT/CN2019/071940
Authority: WO
Inventors: 司倩倩; 高雪娟
Original assignee: 电信科学技术研究院有限公司
Priority date: 2018-01-26
Filing date: 2019-01-16
Publication date: 2019-08-01
Also published as: CN110086583B; CN110086583A

Abstract

Provided in embodiments of the present disclosure are an indication method for a downlink assignment index (DAI), and a user terminal and a network side device, wherein the method comprises: a user terminal receiving downlink control information (DCI) that a network side device sends, the DCI comprising a DAI; if the DCI is used for scheduling physical downlink shared channel (PDSCH) transmission of hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback on the basis of a transport block (TB), then the DAI counts the PDSCH transmission only for the TB-based HARQ-ACK feedback; and if the DCI is used for scheduling PDSCH transmission of the HARQ-ACK feedback on the basis of a code block group (CBG), then the DAI counts the PDSCH transmission only for the CBG-based HARQ-ACK feedback; and the user terminal determining a sent HARQ-ACK feedback codebook according to the DAI.

Description

DAI indication method, user terminal and network side device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201 810 078 098, filed on Jan. 26, s.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a method for indicating a Downlink Assignment Index (DAI), a user terminal, and a network side device.

Background technique

Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) feedback, such as Acknowledgment (ACK) or Negative Response, is supported in the 5G New Radio (NR) system. (Negative-Acknowledgment, NACK). However, one of the two subcodebooks corresponds to a HARQ-ACK feedback based on a Transport Block (TB), and the other corresponds to a HARQ-ACK feedback of a Code Block Group (CBG).

In addition, the DAI in the downlink control information (DCI) is defined based on all carriers configured by the user terminal, specifically, in the feedback window, specifically, in the feedback window, according to the first carrier index. Then, the Physical Downlink Control Channel (PDCCH) detects the order in which the opportunity index is added, and all the DCI formats 1_0 or the DCI format 1_1 schedule the physical downlink shared channel (Physical Downlink Shared Channel, until the current carrier and the current PDCCH detection opportunity). The PDSCH) transmission and DCI format 1_0 indicate the cumulative number of downlink SPS releases.

Thus, when the user terminal does not detect the DCI transmitted in the carrier 2 slot n+1, the user terminal may know that one downlink transmission is lost according to the DAI included in other DCIs received in the feedback window, but the lost downlink cannot be determined. Whether the transmission occurs on carrier 1 or carrier 2, such that when two subcodebooks are used for HARQ-ACK feedback according to the currently defined DAI, an error is generated.

Summary of the invention

The embodiments of the present disclosure provide a method for indicating a DAI, a user terminal, and a network side device, to solve the problem that an error occurs when performing HARQ-ACK feedback using two subcodebooks.

In a first aspect, an embodiment of the present disclosure provides a method for indicating a DAI, including:

The user equipment receives the network side device to send the DCI, where the DCI includes the DAI, where the DAI is only for the PDSCH based on the TB for HARQ-ACK feedback if the DCI is used to schedule the PDSCH transmission based on the TB for HARQ-ACK feedback. The transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI only counts PDSCH transmissions based on CBG for HARQ-ACK feedback;

The user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of the following:

The downlink allocation indication (counter DAI, C-DAI) and the total downlink allocation indication (total DAI, T-DAI) are counted.

Optionally, in the case that the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order of increasing the first carrier index and then increasing the PDCCH detection opportunity index, all the scheduled PDSCH transmissions or indicating the downlink semi-persistent scheduling to the current carrier and the current PDCCH detection opportunity (Semi-Persistent Scheduling) The number of PDCCHs corresponding to the first DCI format released by the service, and the sum of the number of PDCCHs corresponding to the second DCI format for scheduling the PDSCH transmission on the carrier configured for the PDSCH transmission based on the TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.

Optionally, in the case that only the primary carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on the TB, scheduling the DCI of the PDSCH transmission on the primary carrier includes the C-DAI, excluding the T-DAI .

Optionally, in the case that the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.

Optionally, in a case where only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C-DAI, excluding the T-DAI.

In a second aspect, an embodiment of the present disclosure further provides a method for indicating a DAI, including:

Transmitting a DCI to a user terminal, where the DCI includes a DAI, wherein if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback, the DAI only counts PDSCH transmissions based on TB for HARQ-ACK feedback If the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, and the DAI is used by the user terminal to determine the transmission. HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

In a third aspect, an embodiment of the present disclosure further provides a user terminal, including:

a receiving module, configured to receive, by the network side device, downlink control information DCI, where the DCI includes a DAI, where the DCI is used to schedule a physical downlink shared channel for performing hybrid automatic repeat request acknowledgement HARQ-ACK feedback based on the transport block TB For PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, and if the DCI is used for scheduling PDSCH transmission based on code block group CBG for HARQ-ACK feedback, the DAI is only based on The PDSCH transmission of the HARQ-ACK feedback by the CBG is counted;

And a determining module, configured to determine, according to the DAI, a transmitted HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

In a fourth aspect, the embodiment of the present disclosure further provides a network side device, including:

a sending module, configured to send a DCI to the user terminal, where the DCI includes a DAI, where the DAI is only for HARQ-ACK feedback based on the TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback The PDSCH transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is used for the The user terminal determines the transmitted HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

In a fifth aspect, an embodiment of the present disclosure further provides a user terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor,

The transceiver is configured to receive, by the network side device, a DCI, where the DCI includes a DAI, where the DAI is only for a TB based HARQ if the DCI is used to schedule a PDSCH transmission based on a TB for HARQ-ACK feedback. - the PDSCH transmission of the ACK feedback is counted, and if the DCI is used to schedule the PDSCH transmission based on the CBG for HARQ-ACK feedback, the DAI only counts the PDSCH transmission for performing HARQ-ACK feedback based on the CBG;

Determining a transmitted HARQ-ACK feedback codebook according to the DAI;

or,

The transceiver is configured to receive, by the network side device, downlink control information (DCI), where the DCI includes a DAI, where the DCI is used to schedule a physical downlink of the hybrid automatic retransmission request to confirm the HARQ-ACK feedback based on the transport block TB. Shared channel PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, if the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, then the DAI only Counting PDSCH transmissions based on CBG for HARQ-ACK feedback

The processor is configured to read a program in the memory and perform the following process:

The transmitted HARQ-ACK feedback codebook is determined according to the DAI.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

Optionally, in case only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C-DAI, excluding the T-DAI.

In a sixth aspect, an embodiment of the present disclosure further provides a network side device, including: a transceiver, a memory, a processor, and a program stored on the memory and operable on the processor,

The transceiver is configured to send a DCI to a user terminal, where the DCI includes a DAI, where the DAI is only for HARQ based on a TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback. The PDSCH transmission of the ACK feedback is counted. If the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, and the DAI is used for The user terminal determines the transmitted HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

In a seventh aspect, the embodiment of the present disclosure further provides a computer readable storage medium, where the program is stored, and when the program is executed by the processor, the steps in the DAI indicating method according to the first aspect are implemented, or The program is executed by the processor to implement the steps in the method of indicating the DAI as described in the second aspect above.

In the embodiment of the present disclosure, the user terminal receives the network side device to send downlink control information DCI, where the DCI includes DAI, where the DCI is used to schedule a hybrid automatic retransmission request based on the transport block TB to confirm the HARQ-ACK feedback physical Downlink shared channel PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, and if the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, the DAI The PDSCH transmission for HARQ-ACK feedback based on the CBG is counted only; the user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI. The DAI corresponding to the CBRG-based PDSCH transmission and the TB-based PDSCH transmission are separately counted and counted, so that the user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI, and does not make an error, thereby avoiding the use of two subcodes. The error caused by the HARQ-ACK feedback ensures the correctness of the dynamic codebook in the case of using two sub-codebook feedbacks, thereby ensuring reliable performance of the system.

DRAWINGS

1 is a schematic structural diagram of a network applicable to an embodiment of the present disclosure;

FIG. 2 is a flowchart of a method for indicating a DAI according to an embodiment of the present disclosure;

3 is a schematic diagram of an indication of a DAI provided by an embodiment of the present disclosure;

4 is a schematic diagram of another indication of DAI provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another indication of DAI provided by an embodiment of the present disclosure; FIG.

FIG. 6 is a flowchart of another method for indicating a DAI according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a network side device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another user terminal according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another network side device according to an embodiment of the present disclosure.

Detailed ways

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a network structure applicable to an embodiment of the present disclosure. As shown in FIG. 1 , a user equipment (User Equipment, UE) 11 and a network side device 12 are illustrated. The user terminal 11 may be a mobile phone. Terminals such as Tablet Personal Computer, Laptop Computer, Personal Digital Assistant (PDA), Mobile Internet Device (MID), or Wearable Device The side device, it should be noted that the specific type of the user terminal 11 is not limited in the embodiment of the present disclosure. The network side device 12 may be a base station, for example, a macro station, an LTE eNB, a 5G NR NB, etc.; the network side device 12 may also be a small station, such as a low power node (LPN: low power node) pico, femto, etc., or The network side device 12 may be an access point (AP); the base station may also be a network node formed by a central unit (CU) and a plurality of transmission reception points (TRPs) that are managed and controlled by the central unit (CU). . It should be noted that the specific type of the network side device 12 is not limited in the embodiment of the present disclosure.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for indicating a DAI according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes the following steps:

201. The user equipment receives a network side device to send a DCI, where the DCI includes a DAI, where the DAI is only used for performing HARQ-ACK feedback based on the TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback. The PDSCH transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI only counts PDSCH transmissions based on CBG for HARQ-ACK feedback;

202. The user terminal determines, according to the DAI, a sent HARQ-ACK feedback codebook.

In addition, the DCI may be a DCI that schedules transmission of any time domain resource, for example, a subframe or a slot or a mini-slot.

It should be noted that, in the embodiments of the present disclosure, for convenience of description, a PDSCH transmission based on TB for HARQ-ACK feedback may be referred to as a TB-based PDSCH transmission; and a PDSCH transmission based on CBG for HARQ-ACK feedback may be referred to as CBG-based PDSCH transmission.

In addition, the user terminal determines, according to the DAI, that the sent HARQ-ACK feedback codebook may be, according to the DAI included in the DCI, determines a downlink situation that the network side device allocates to the user terminal, for example, the network side device schedules to the user. The PDSCH transmits or indicates information released by the SPS service, so that the user terminal can perform corresponding HARQ-ACK feedback according to the downlink transmission actually received in the feedback window, for example, the user terminal receives the CBG based on the last received in the feedback window. The DAI in the DCI of the PDSCH transmission determines the transmitted HARQ-ACK feedback codebook size, and determines the order of each bit in the transmitted HARQ-ACK feedback codebook according to the DAI in each received DCT of the CBG-based PDSCH transmission. And status.

In addition, the HARQ-ACK feedback codebook sent by the foregoing may be a HARQ-ACK feedback codebook that the user terminal needs to send to the network side device.

Through the above steps, DAI sorting and counting can be respectively performed on the CBG-based PDSCH transmission and the TB-based PDSCH transmission. For example, in a case where CBG transmission is configured, DAI sorting and counting are respectively performed on the CBG-based PDSCH transmission and the TB-based PDSCH transmission by the above steps, that is, DAI sorting and counting are separately performed for the CBG-based PDSCH transmission, And DAI sorting and counting separately for TB-based PDSCH transmission. Therefore, when the user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI, the user does not make an error, thereby avoiding the error caused by using the two subcodebooks for HARQ-ACK feedback, and ensuring that the dynamic codebook uses two children. The correctness of the codebook feedback, in order to ensure the reliable performance of the system.

As an optional implementation manner, the foregoing DAI includes at least one of the following:

C-DAI and T-DAI.

The statistics of the C-DAI may be that, in the feedback window, the statistics are performed according to the first in increasing order of carrier index and then in increasing order of PDCCH monitoring occasion index. In this way, the user terminal can determine, by the C-DAI, that the scheduled carrier and the current PDCCH detection opportunity, the scheduled PDSCH transmission or the PDCCH detection opportunity or the DCI corresponding to the DCI for scheduling the PDSCH transmission or the DCI corresponding to the SPS resource release. The total number of PDCCH transmissions. The order in which the foregoing first carrier index is increased and then the PDCCH detection opportunity index is increased may be understood as: when the same same time domain resource (subframe or slot) is scheduled to be downlinked in multiple carriers, when the C-DAI is in statistics, The carrier index is first counted to sort the PDCCH detection opportunities on the previous carrier, and then the PDCCH detection opportunity on the carrier after the carrier index is sorted is counted. For example, slot n+1 of carrier 1 and slot n+1 of carrier 2 are both PDCCH detection opportunities (for example, PDSCH transmission is scheduled), and C-DAI in DCI corresponding to slot n+1 of carrier 1 is first counted. The C-DAI in the DCI corresponding to the slot n+1 of the carrier 2 is re-stated, that is, the value of the C-DAI in the DCI corresponding to the slot n+1 of the carrier 1 is higher than the value in the DCI corresponding to the slot n+1 of the carrier 2. The value of C-DAI is one. If the value of the C-DAI in the DCI corresponding to the slot n+1 of the carrier 1 is n, the value of the C-DAI in the DCI corresponding to the slot n+1 of the carrier 2 is n+1. Preferably, the C-DAI statistics are the number of PDCCHs transmitted in the PDCCH detection opportunity or the cumulative number of PDCCH transmissions corresponding to the DCI indicating the release of the SPS resource. When there is cross-slot scheduling, one PDCCH detection opportunity Multiple PDCCHs may be transmitted, and within the same time slot, there may be PDCCH transmission, but the corresponding PDSCH is not in the same time slot. For example, if slot n+1 schedules PDSCH transmission in slot n+2 and slot n+3, slot n+1 includes two PDCCHs, and one of the included DCIs is used to schedule PDSCH transmission in slot n+2. Another included DCI is used to schedule PDSCH transmission in slot n+3, and the C-DAI corresponding to slot n+3 is one greater than the C-DAI corresponding to slot n+2.

The statistics of the T-DAI may be the number of scheduled PDSCH transmissions or the number of PDCCH detection opportunities up to the current PDCCH detection opportunity. It should be noted that, in the statistics, the T-DAI may not need to be increased according to the first carrier index and then the PDCCH detection opportunity index is increased. For example, slot n+1 of carrier 1 and slot n+1 of carrier 2 are both PDCCH detection opportunities (for example, PDSCH transmission is scheduled), and T-DAI and carrier 2 in DCI corresponding to slot n+1 of carrier 1 The value of T-DAI in the DCI corresponding to slot n+1 is the same. Preferably, the T-DAI statistics are the number of PDCCHs transmitted in the PDCCH detection opportunity or the total number of PDCCH transmissions corresponding to the DCI indicating the release of the SPS resources. When there is cross-slot scheduling, one PDCCH detection opportunity Multiple PDCCHs may be transmitted, and within the same time slot, there may be PDCCH transmission, but the corresponding PDSCH is not in the same time slot. For example, if slot n+1 schedules PDSCH transmission in slot n+2 and slot n+3, slot n+1 includes two PDCCHs, and one of the included DCIs is used to schedule PDSCH transmission in slot n+2. The other included DCI is used to schedule the PDSCH transmission in the slot n+3. At this time, the T-DAI corresponding to the PDSCH in the slot n+3 and the slot n+2 is the same.

In this implementation manner, the C-DAI and the T-DAI may be used to indicate the number of PDCCH transmissions corresponding to the scheduled PDSCH transmission or the DCI for scheduling the PDSCH transmission or the DCI corresponding to the DCI indicating the SPS resource release. HARQ-ACK feedback for the user terminal.

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the SPS service release are corresponding to the current carrier and the current PDCCH detection opportunity. The number of PDCCHs, and the sum of the number of PDCCHs corresponding to the second DCI format for scheduling PDSCH transmission on the carrier configured for PDSCH transmission based on TB for HARQ-ACK feedback;

The first DCI format may be a DCI format 1_0 (DCI format 1_0) defined in the 5G NR system, and the second DCI format may be a DCI format 1_1 (DCI format 1_1) defined in the 5G NR system. The disclosed embodiments are not limited. For example, the first DCI format and the second DCI format may be other two different DCI formats.

In addition, the feedback air interface may be a feedback window of the HARQ-ACK, and the feedback window may be predefined, for example, pre-defined in the protocol, or the network side device is pre-configured to the user terminal, or the user terminal and the network side device are pre-defined. Conventional, etc.

The number of PDCCHs corresponding to the first DCI format of all the scheduled PDSCH transmissions or the SPS service release, and the PDCCH corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the TB for HARQ-ACK feedback The sum of the numbers can be understood as the sum of the number of PDCCHs corresponding to all the first DCI formats and the number of PDCCHs corresponding to all the second DCI formats, where the first DCI format is for scheduling PDSCH transmission or indicating downlink SPS service release. The DCI format, and the second DCI format is a DCI format that schedules PDSCH transmission on a carrier configured for PDSCH transmission based on TB for HARQ-ACK feedback.

For the C-DAI, the number of PDCCHs corresponding to the second DCI format for scheduling the PDSCH transmission on the carrier configured for the PDSCH transmission based on the TB for HARQ-ACK feedback may be configured to perform HARQ-ACK feedback based on the TB. The number of PDCCH accumulations corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission.

For the T-DAI, the number of PDCCHs corresponding to the second DCI format for scheduling the PDSCH transmission on the carrier configured for the PDSCH transmission based on the TB for HARQ-ACK feedback may be configured to perform HARQ-ACK feedback based on the TB. The total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission.

In this embodiment, the C-DAI and T-DAI representation counts can be made easier for the user terminal to determine the HARQ-ACK feedback codebook in the above manner to further improve the performance of the HARQ-ACK feedback of the user terminal.

In this embodiment, if the user terminal is configured to perform the PDSCH transmission of the HARQ-ACK feedback based on the TB, the DCI that schedules the PDSCH transmission on the primary carrier includes the C-DAI, and does not include the T. -DAI, which can save the overhead of DCI, and in this case, only C-DAI can ensure the correctness of the dynamic codebook in the case of using two sub-codebook feedback, thereby ensuring reliable performance of the system.

Optionally, in the case that the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback, the DCI may be a DCI of a back-off format or a carrier for scheduling PDSCH transmission based on TB for HARQ-ACK feedback. DCI. In addition, the DCI of the above-mentioned fallback format is DCI format 1_0, and the DCI on the carrier for scheduling PDSCH transmission based on TB for HARQ-ACK feedback may be DCI format 1_0 or DCI format 1_1.

For the foregoing second DCI format, refer to the related description of the previous embodiment, and details are not described herein.

The carrier here may be a carrier configured to perform PDQ transmission of HARQ-ACK feedback based on CBG.

In this implementation manner, since the T-DAI may not be included, the overhead of the DCI may be saved, and in this case, the correctness of the dynamic codebook in the case of using the two sub-codebook feedback can be ensured only by the C-DAI. In turn, the system is guaranteed to have reliable performance.

Optionally, where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DCI may be a DCI of a non-backoff format on a carrier scheduled to be configured for CBG-based PDSCH transmission, and The DCI of the non-backward format may be DCI format 1_1.

In the following three specific embodiments, various embodiments described above are exemplified:

example 1:

It is assumed that the base station configures two carriers for the user terminal, the carrier 1 (CC1) is a CBG-based PDSCH transmission, the CBG size is 2, and is all scheduled by the non-return DCI; the carrier 2 (CC2) is the TB-based PDSCH transmission. As shown in FIG. 3, the C-DAI and T-DAI on carrier 1 only count the number of PDSCHs scheduled on carrier 1, for example, PDSCH is scheduled in slot n, slot n+2, and slot n+3. For transmission, the DCI contained in the slot n is C-DAI and T-DAI is 0, the DCI in the slot n+2 contains C-DAI and T-DAI, and the DCI contained in the slot n+3 is C-DAI and T. -DAI is 2. In this embodiment, the DCI on the carrier 1 may not include the T-DAI information field, and only the C-DAI information field. The C-DAI and T-DAI on carrier 2 only count the number of PDSCHs scheduled on carrier 2, such as PDSCH transmission in slot n+1, slot n+2 and slot n+3, then slot n The C-DAI and T-DAI of the DCI in +1 are 0, the C-DAI and T-DAI of the DCI in slot n+2 are 1, and the C-DAI and T-DAI in the DCI of slot n+3 are 2.

Example 2:

It is assumed that the base station configures two carriers for the user terminal, the carrier 1 (CC1) is a CBG-based PDSCH transmission, and the CBG size is 2. The PDSCH transmission in the slot n+2 is scheduled by the fallback DCI, and the carrier 2 (CC2) is TB-based PDSCH transmission. As shown in FIG. 4, the C-DAI and T-DAI of the non-return DCI on the carrier 1 are only counted for the number of PDSCHs scheduled by the non-return DCI on the carrier 1, for example, in slot n and slot n+3. The non-return DCI schedules the PDSCH transmission, and the DCI contained in the slot n has a C-DAI and a T-DAI of 0, and the DCI contained in the slot n+3 has a C-DAI and a T-DAI of 1. In this embodiment, the DCI on the carrier 1 may not include the T-DAI information field, and only the C-DAI information field. The C-DAI and T-DAI on carrier 2 count for the number of PDSCHs scheduled on carrier 2 and the PDSCH transmissions for DCI scheduling on carrier 1, for example, slot n+1, slot n+2 on carrier 2. The PDSCH transmission is scheduled in slot n+3, and the PDSCH transmission in slot n+2 of carrier 1 is scheduled by the fallback DCI, and the DCI included in the slot n+1 is 0, slot n The DCI of carrier 1 in +2 contains 1 C-DAI and 2 is T-DAI. The DCI of carrier 2 in slot n+2 contains C-DAI and T-DAI of 2, and carrier 2 of slot n+3 The DCI contains C-DAI and T-DAI of 3.

Example 3:

It is assumed that the base station configures three carriers for the user terminal, the CBG-based PDSCH transmission on the carrier 1 (CC1), the CBG size is 2, all are scheduled by the non-return DCI, and the carrier 2 (CC2) is the TB-based PDSCH transmission; Carrier 3 (CC3) is a CBG-based PDSCH transmission with a CBG size of 4, all scheduled by non-return DCI. As shown in FIG. 5, if cross-slot scheduling is used, the C-DAI and T-DAI on carrier 1 and carrier 3 count the PDCCH order corresponding to the PDSCH scheduled on

carriers

1 and 3, for example, carrier 1 is PDSCH transmission is scheduled in slot n, slot n+2, and slot n+3, and carrier 3 schedules PDSCH transmission in slot n+1, slot n+2, and slot n+3, and carrier 1 corresponds to PDSCH in slot n. The DCI (transmitted in slot n-1) contains C-DAI and T-DAI is 0, carrier 3 in slot n+1, the DCI corresponding to PDSCH contains C-DAI and T-DAI is 1, carrier 1 is The DCI corresponding to the PDSCH in slot n+2 and slot n+3 (both in slot n+2 transmission) contains C-DAI and T-DAI of 2, 5 and 3, 5, respectively, and carrier 3 is in slot n+2 and The DCI corresponding to the PDSCH in slot n+3 (both transmitted in slot n+2) contains C-DAI and T-DAI of 4, 5 and 5, 5, respectively.

The C-DAI and T-DAI on carrier 2 only count the number of PDSCHs scheduled on carrier 2, such as PDSCH transmission in slot n+1, slot n+2, and slot n+3, then slot n The DCI corresponding to the PDSCH in +1 includes C-DAI and T-DAI, and the DCI corresponding to the PDSCH in slot n+2 includes C-DAI and T-DAI, and the DCI corresponding to PDSCH in slot n+3 includes The C-DAI and T-DAI are 2.

It should be noted that the various optional embodiments described in the embodiments of the present disclosure may be implemented in combination with each other, or may be implemented separately, and the embodiments of the present disclosure are not limited thereto. In addition, in the embodiment of the present disclosure, the network side device may determine the DAI in the DCI according to the foregoing manner, and the user terminal may understand the DAI definition in the DCI according to the same manner.

In the embodiment of the present disclosure, the user terminal receives the network side device to send downlink control information DCI, where the DCI includes DAI, where the DCI is used to schedule a hybrid automatic retransmission request based on the transport block TB to confirm the HARQ-ACK feedback physical Downlink shared channel PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, and if the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, the DAI The PDSCH transmission for HARQ-ACK feedback based on the CBG is counted only; the user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI. The DAI corresponding to the CBRG-based PDSCH transmission and the TB-based PDSCH transmission are respectively counted and counted, so that the user terminal determines the HARQ-ACK feedback codebook according to the DAI, and does not make an error, thereby avoiding using two sub-codebooks. The error caused by the HARQ-ACK feedback ensures the correctness of the dynamic codebook in the case of using two subcodebook feedbacks, thereby ensuring reliable performance of the system.

Please refer to FIG. 6. FIG. 6 is a flowchart of another method for indicating a DAI according to an embodiment of the present disclosure. As shown in FIG. 6, the method includes the following steps:

601. Send a DCI to a user terminal, where the DCI includes a DAI, where the DAI is only for PDSCH transmission based on TB for HARQ-ACK feedback, if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback. Counting, if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, and the DAI is used for determining by the user terminal. The HARQ-ACK feedback codebook sent.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

It should be noted that the present embodiment is an implementation manner of the network side device corresponding to the embodiment shown in FIG. 2, and a specific implementation manner of the embodiment may refer to the related description of the embodiment shown in FIG. This embodiment will not be described again, and the same advantageous effects can be achieved.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a user terminal according to an embodiment of the present disclosure. As shown in FIG. 5, the user terminal 700 includes:

The receiving module 701 is configured to receive, by the network side device, a DCI, where the DCI includes a DAI, where the DAI is only for HARQ based on the TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback. The PDSCH transmission of the ACK feedback is counted, and if the DCI is used to schedule PDSCH transmission based on the code block group CBG for HARQ-ACK feedback, the DAI only counts the PDSCH transmission for performing HARQ-ACK feedback based on the CBG;

The determining module 702 is configured to determine the transmitted HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

It should be noted that, in the embodiment, the user terminal 700 may be a user terminal in any embodiment of the method in the embodiment of the disclosure, and any implementation manner of the user terminal in the method embodiment of the disclosure may be used in this embodiment. The foregoing user terminal 700 in the embodiment is implemented, and the same beneficial effects are achieved, and details are not described herein again.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a network side device according to an embodiment of the present disclosure. As shown in FIG. 8, the network side device 800 includes:

The sending module 801 is configured to send a DCI to the user terminal, where the DCI includes a DAI, where the DAI is only for the TB-based HARQ-ACK if the DCI is used to schedule a PDSCH transmission based on the TB for HARQ-ACK feedback. The fed back PDSCH transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is used for The user terminal determines the transmitted HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

It should be noted that, in the embodiment, the network side device 800 may be the network side device in any of the method embodiments in the embodiment of the disclosure, and any implementation manner of the network side device in the method embodiment in the embodiment of the disclosure It can be implemented by the above network side device 800 in this embodiment, and achieve the same beneficial effects, and details are not described herein again.

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of another user terminal according to an embodiment of the present disclosure. As shown in FIG. 9, the user terminal includes: a transceiver 910, a memory 920, a processor 900, and a memory stored in the memory. a program on 920 and operable on the processor, wherein:

The transceiver 910 is configured to receive, by the network side device, a DCI, where the DCI includes a DAI, where the DAI is only for a TB-based if the DCI is used to schedule a PDSCH transmission based on a TB for HARQ-ACK feedback. The PDSCH transmission of the HARQ-ACK feedback is counted, and if the DCI is used to schedule the PDSCH transmission based on the CBG for HARQ-ACK feedback, the DAI only counts the PDSCH transmission for performing HARQ-ACK feedback based on the CBG;

Determining a transmitted HARQ-ACK feedback codebook according to the DAI;

or,

The transceiver 910 is configured to receive, by the network side device, downlink control information DCI, where the DCI includes a DAI, where the DCI is used to schedule a hybrid automatic retransmission request based on the transport block TB to confirm the HARQ-ACK feedback physical Downlink shared channel PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, and if the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, the DAI Counting only PDSCH transmissions based on CBG for HARQ-ACK feedback

The processor 900 is configured to read a program in the memory 920 and perform the following process:

The transmitted HARQ-ACK feedback codebook is determined according to the DAI.

The transceiver 910 can be configured to receive and transmit data under the control of the processor 900.

In FIG. 9, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 900 and various circuits of memory represented by memory 920. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 910 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.

The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.

It should be noted that the memory 920 is not limited to only the user terminal, and the memory 920 and the processor 900 may be separated in different geographical locations.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

It should be noted that, in the embodiment, the foregoing user terminal may be a user terminal in any embodiment of the method in the embodiment of the disclosure, and any implementation manner of the user terminal in the method embodiment in the embodiment of the disclosure may be implemented by the implementation. The above-mentioned user terminal in the example is implemented, and the same beneficial effects are achieved, and details are not described herein again.

Please refer to FIG. 10. FIG. 10 is a schematic structural diagram of another network side device according to an embodiment of the present disclosure. As shown in FIG. 10, the network side device includes: a transceiver 1010, a memory 1020, a processor 1000, and the foregoing. A program on the memory 1020 and operable on the processor, wherein:

The transceiver 1010 is configured to send a DCI to a user terminal, where the DCI includes a DAI, where the DAI is only for a TB based HARQ if the DCI is used to schedule a PDSCH transmission based on a TB for HARQ-ACK feedback. - The PDSCH transmission of the ACK feedback is counted, and if the DCI is used to schedule the PDSCH transmission based on the CBG for HARQ-ACK feedback, the DAI only counts the PDSCH transmission for performing HARQ-ACK feedback based on the CBG, the DAI is used for And determining, by the user terminal, the transmitted HARQ-ACK feedback codebook.

The transceiver 1010 is configured to receive and transmit data under the control of the processor 1000.

In FIG. 10, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1000 and various circuits of memory represented by memory 1020. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 1010 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.

The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 can store data used by the processor 1000 in performing operations.

It should be noted that the memory 1020 is not limited to only the network side device, and the memory 1020 and the processor 1000 may be separated into different geographical locations.

Optionally, the DAI includes at least one of the following:

C-DAI and T-DAI.

It should be noted that, in the embodiment, the network side device may be the network side device in any of the method embodiments in the embodiment of the disclosure, and any implementation manner of the network side device in the method embodiment in the embodiment of the disclosure may be used. It is implemented by the above network side device in this embodiment, and achieves the same beneficial effects, and details are not described herein again.

The embodiment of the present disclosure further provides a computer readable storage medium, where the computer program is stored, and when the program is executed by the processor, the steps in the method for indicating the DAI of the user terminal provided by the embodiment of the present disclosure are implemented, or When the program is executed by the processor, the steps in the method for indicating the DAI of the network side device side provided by the embodiment of the present disclosure are implemented.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present disclosure. It should also be considered as the scope of protection of the present disclosure.

Claims

A method for indicating a downlink allocation indication DAI includes:

The user terminal receives the network side device to send the downlink control information DCI, where the DCI includes the DAI, where the DCI is used to schedule the physical downlink shared channel PDSCH transmission based on the transport block TB to perform the hybrid automatic repeat request acknowledgement HARQ-ACK feedback, The DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback. If the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, the DAI is only for HARQ based on CBG. - ACK feedback PDSCH transmission is counted;

The user terminal determines the transmitted HARQ-ACK feedback codebook according to the DAI.
The method of claim 1 wherein said DAI comprises at least one of:

The countdown allocation indication C-DAI and the total downlink assignment indication T-DAI are counted.
The method of claim 2, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the downlink semi-persistent scheduling SPS service release are released until the current carrier and the current PDCCH detection opportunity. The number of PDCCHs corresponding to a DCI format, and the sum of the number of PDCCHs corresponding to the second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The method according to claim 2 or 3, wherein, in the case where only the primary carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on the TB, scheduling the DCI of the PDSCH transmission on the primary carrier includes the C- DAI, excluding the T-DAI.
The method of claim 2, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
The method according to claim 2 or 5, wherein, in the case where only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C-DAI Excluding the T-DAI.
A method of indicating DAI, including:

Transmitting a DCI to a user terminal, where the DCI includes a DAI, wherein if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback, the DAI only counts PDSCH transmissions based on TB for HARQ-ACK feedback If the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, and the DAI is used by the user terminal to determine the transmission. HARQ-ACK feedback codebook.
The method of claim 7, wherein the DAI comprises at least one of the following:

C-DAI and T-DAI.
The method of claim 8, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The method according to claim 8 or 9, wherein, in the case where only the primary carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on the TB, scheduling DCI of the PDSCH transmission on the primary carrier includes the C- DAI, excluding the T-DAI.
The method of claim 8, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
The method according to claim 8 or 11, wherein, in the case where only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C-DAI Excluding the T-DAI.
A user terminal comprising:

a receiving module, configured to receive, by the network side device, a DCI, where the DCI includes a DAI, where the DAI is only for a TB-based HARQ-ACK if the DCI is used to schedule a PDSCH transmission based on a TB for HARQ-ACK feedback. The fed back PDSCH transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI only counts PDSCH transmissions based on CBG for HARQ-ACK feedback;

And a determining module, configured to determine, according to the DAI, a transmitted HARQ-ACK feedback codebook.
The user terminal of claim 13, wherein the DAI comprises at least one of the following:

C-DAI and T-DAI.
The user terminal according to claim 14, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The user terminal according to claim 14, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
A network side device, including:

a sending module, configured to send a DCI to the user terminal, where the DCI includes a DAI, where the DAI is only for HARQ-ACK feedback based on the TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback The PDSCH transmission is counted, and if the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is used for the The user terminal determines the transmitted HARQ-ACK feedback codebook.
The network side device according to claim 17, wherein the DAI comprises at least one of the following:

C-DAI and T-DAI.
The network side device according to claim 18, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The network side device according to claim 18, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
A user terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein

The transceiver is configured to receive, by the network side device, a DCI, where the DCI includes a DAI, where the DAI is only for a TB based HARQ if the DCI is used to schedule a PDSCH transmission based on a TB for HARQ-ACK feedback. - the PDSCH transmission of the ACK feedback is counted, and if the DCI is used to schedule the PDSCH transmission based on the CBG for HARQ-ACK feedback, the DAI only counts the PDSCH transmission for performing HARQ-ACK feedback based on the CBG;

Determining a transmitted HARQ-ACK feedback codebook according to the DAI;

or,

The transceiver is configured to receive, by the network side device, downlink control information (DCI), where the DCI includes a DAI, where the DCI is used to schedule a physical downlink of the hybrid automatic retransmission request to confirm the HARQ-ACK feedback based on the transport block TB. Shared channel PDSCH transmission, the DAI is only counted for PDSCH transmission based on TB for HARQ-ACK feedback, if the DCI is used to schedule PDSCH transmission based on code block group CBG for HARQ-ACK feedback, then the DAI only Counting PDSCH transmissions based on CBG for HARQ-ACK feedback

The processor is configured to read a program in the memory and perform the following process:

The transmitted HARQ-ACK feedback codebook is determined according to the DAI.
The user terminal of claim 21, wherein the DAI comprises at least one of the following:

C-DAI and T-DAI.
The user terminal according to claim 22, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The user terminal according to claim 22 or 23, wherein, in the case where only the primary carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on the TB, scheduling DCI of the PDSCH transmission on the primary carrier includes the C -DAI, excluding the T-DAI.
The user terminal according to claim 22, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
The user terminal according to claim 22 or 25, wherein, in the case where only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C- DAI, excluding the T-DAI.
A network side device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and operable on the processor, wherein

The transceiver is configured to send a DCI to a user terminal, where the DCI includes a DAI, where the DAI is only for HARQ based on a TB if the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback. The PDSCH transmission of the ACK feedback is counted. If the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback, the DAI is only counted for PDSCH transmission based on CBG for HARQ-ACK feedback, and the DAI is used for The user terminal determines the transmitted HARQ-ACK feedback codebook.
The network side device according to claim 27, wherein the DAI comprises at least one of the following:

C-DAI and T-DAI.
The network side device according to claim 28, wherein, in the case where the DCI is used to schedule PDSCH transmission based on TB for HARQ-ACK feedback,

The C-DAI is: in the feedback window, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, all the scheduled PDSCH transmissions or the first DCI format indicating the release of the downlink SPS service are released until the current carrier and the current PDCCH detection opportunity. a corresponding PDCCH number, and a sum of PDCCH numbers corresponding to a second DCI format for scheduling PDSCH transmission on a carrier configured to perform PDQ transmission based on TB for HARQ-ACK feedback;

The T-DAI is: in the feedback window, the number of PDCCHs corresponding to the first DCI format for scheduling the PDSCH transmission or the downlink SPS service release, and the HARQ-ACK feedback based on the TB, to the current PDCCH detection opportunity. The sum of the number of PDCCHs corresponding to the second DCI format of the PDSCH transmission is scheduled on the carrier of the PDSCH transmission, and the T-DAI is updated by the PDCCH detection opportunity one by one.
The network side device according to claim 28 or 29, wherein, in the case where only the primary carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on the TB, scheduling DCI of the PDSCH transmission on the primary carrier includes the C-DAI, excluding the T-DAI.
The network side device according to claim 28, wherein, in the case where the DCI is used to schedule PDSCH transmission based on CBG for HARQ-ACK feedback,

The C-DAI is: in the feedback window, the carrier configured with the PDSCH transmission based on the CBG for HARQ-ACK feedback, according to the order in which the first carrier index is increased and then the PDCCH detection opportunity index is increased, until the current carrier and the current PDCCH detection opportunity. And all the PDCCH accumulation numbers corresponding to the second DCI format of the PDSCH transmission based on the CBG performing HARQ-ACK feedback;

The T-DAI is: a total number of PDCCHs corresponding to the second DCI format of the PDSCH transmission scheduled on the carrier of the PDSCH transmission based on the CBG for the HARQ-ACK feedback, in the feedback window, and the current PDCCH detection opportunity. The T-DAI is updated on a PDCCH-by-PDCCH basis.
The network side device according to claim 28 or 31, wherein, in a case where only one carrier is configured to perform PDQ transmission of HARQ-ACK feedback based on CBG, scheduling DCI of PDSCH transmission on the carrier includes the C -DAI, excluding the T-DAI.
A computer readable storage medium having stored thereon a program, wherein the program is executed by a processor to implement the steps in the method of indicating the DAI according to any one of claims 1 to 6, or the program is The steps in the method of indicating the DAI according to any one of claims 7 to 12 when the processor is executed.