CN110086583B

CN110086583B - DAI indicating method, user terminal and network side equipment

Info

Publication number: CN110086583B
Application number: CN201810078980.5A
Authority: CN
Inventors: 司倩倩; 高雪娟
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-01-26
Filing date: 2018-01-26
Publication date: 2021-05-07
Anticipated expiration: 2038-01-26
Also published as: CN110086583A; WO2019144833A1

Abstract

The embodiment of the invention provides a DAI indicating method, a user terminal and network side equipment, wherein the method comprises the following steps: a user terminal receives DCI sent by network side equipment, wherein the DCI comprises DAI, if the DCI is used for scheduling PDSCH transmission of a Physical Downlink Shared Channel (PDSCH) which carries out HARQ-ACK feedback based on a Transport Block (TB), the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on the TB, and if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on a Code Block Group (CBG), the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on the CBG; and the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI. The embodiment of the invention can ensure the correctness of the dynamic codebook under the condition of using two sub-codebooks for feedback, thereby ensuring the reliable performance of the system.

Description

DAI indicating method, user terminal and network side equipment

Technical Field

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

Background

In a 5G New Radio (NR) system, Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) feedback is supported by using two sub-codebooks, for example: positive Acknowledgement (ACK) or Negative Acknowledgement (NACK). However, one of the two sub-codebooks corresponds to Transport Block (TB) based HARQ-ACK feedback, and the other corresponds to Code Block Group (CBG) HARQ-ACK feedback.

In addition, the DAI in the existing Downlink Control Information (DCI) is defined based on all carriers configured by the ue, specifically, in a feedback window, specifically, in the feedback window, according to an order of increasing a carrier index and then increasing a Physical Downlink Control Channel (PDCCH) detection opportunity index, until the current carrier and the current PDCCH detection opportunity, all DCI format1_0 or the Physical Downlink Shared Channel (PDSCH) transmission scheduled by DCI format1_1 and DCI format1_0 indicate the cumulative number of SPS Downlink 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 the other DCI received in the feedback window, but cannot determine whether the lost downlink transmission occurs on the carrier 1 or the carrier 2, which may cause an error when performing HARQ-ACK feedback using two sub-codebooks according to the existing defined DAI.

Disclosure of Invention

The embodiment of the invention provides a DAI indicating method, a user terminal and network side equipment, which aim to solve the problem of error generation when HARQ-ACK feedback is carried out by using two sub-codebooks.

The embodiment of the invention provides a DAI indicating method, which is characterized by comprising the following steps:

a user terminal receives DCI sent by network side equipment, wherein the DCI comprises DAI, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on TB, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on TB, and if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on CBG, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on CBG;

and the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of:

counting a downlink allocation indication (counter DAI, C-DAI) and a total downlink allocation indication (total DAI, T-DAI).

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

the C-DAI is as follows: in the feedback window, according to the sequence of increasing the carrier index first and then increasing the PDCCH detection opportunity index, the sum of the PDCCH numbers corresponding to a first DCI format for Scheduling PDSCH transmission or indicating the release of a Semi-Persistent Scheduling (SPS) service and the PDCCH numbers corresponding to a second DCI format for Scheduling PDSCH transmission on a carrier configured to carry out HARQ-ACK feedback based on TB is obtained until the current carrier and the current PDCCH detection opportunity;

the T-DAI is as follows: and in the feedback window, the sum of the PDCCH numbers corresponding to all the first DCI formats for scheduling PDSCH transmission or indicating downlink SPS service release until the current PDCCH detection opportunity and the PDCCH number corresponding to the second DCI format for scheduling PDSCH transmission on a carrier wave of the PDSCH transmission configured to carry out HARQ-ACK feedback based on TB, wherein the T-DAI is updated one by one PDCCH detection opportunity.

Optionally, in the case that only the primary carrier is configured to perform PDSCH transmission for HARQ-ACK feedback based on TB, the DCI scheduling PDSCH transmission on the primary carrier includes the C-DAI and does not include the T-DAI.

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

the C-DAI is as follows: in the feedback window, according to the sequence of increasing carrier indexes first and then increasing PDCCH detection opportunity indexes for carriers configured with PDSCH transmission which carries out HARQ-ACK feedback based on CBG, and till the current carriers and the current PDCCH detection opportunities, all PDCCH accumulated numbers corresponding to a second DCI format for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on CBG are obtained;

the T-DAI is as follows: and in the feedback window, the total number of PDCCHs corresponding to the second DCI format for scheduling the PDSCH transmission on the carrier wave of the PDSCH transmission for HARQ-ACK feedback based on the CBG is configured until the current PDCCH detection opportunity, and the T-DAI is updated one by one PDCCH detection opportunity.

Optionally, in the case that only one carrier is configured to perform PDSCH transmission for HARQ-ACK feedback based on CBG, the DCI scheduling PDSCH transmission on the carrier includes the C-DAI and does not include the T-DAI.

The embodiment of the invention also provides a DAI indicating method, which comprises the following steps:

and sending DCI to the user terminal, wherein the DCI comprises DAI, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on TB, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on TB, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on CBG, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on CBG, and the DAI is used for determining a sent HARQ-ACK feedback codebook by the user terminal.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

the C-DAI is as follows: in the feedback window, according to the sequence of increasing the carrier index first and then increasing the PDCCH detection opportunity index, the sum of the PDCCH numbers corresponding to the first DCI format for scheduling PDSCH transmission or indicating downlink SPS service release and the PDCCH numbers corresponding to the second DCI format for scheduling PDSCH transmission on the carrier configured to carry out HARQ-ACK feedback based on TB is carried out until the current carrier and the current PDCCH detection opportunity;

An embodiment of the present invention further provides a user terminal, including:

a receiving module, configured to receive DCI sent by a network side device, where the DCI includes a DAI, where the DAI only counts PDSCH transmission for HARQ-ACK feedback based on a transport block TB if the DCI is used to schedule PDSCH transmission for a physical downlink shared channel for HARQ-ACK feedback acknowledgement based on a transport block TB, and the DAI only counts PDSCH transmission for HARQ-ACK feedback based on a CBG if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a CBG;

and the determining module is used for determining the sent HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

An embodiment of the present invention further provides a network side device, including:

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

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

An embodiment of the present invention further provides a user terminal, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor,

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

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

alternatively, the first and second electrodes may be,

the transceiver is configured to receive DCI (downlink control information) sent by a network side device, where the DCI includes a DAI, the DAI only counts PDSCH (physical Downlink shared channel) transmission for HARQ-ACK feedback based on a transport block TB if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a transport block TB, and the DAI only counts PDSCH transmission for HARQ-ACK feedback based on a CBG if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a code block group CBG

The processor is used for reading the program in the memory and executing the following processes:

and determining the transmitted HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

An embodiment of the present invention further provides a network side device, including: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor,

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

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the method for indicating a DAI on a user terminal side provided in the embodiment of the present invention, or the computer program, when executed by the processor, implements the steps in the method for indicating a DAI on a network side device side provided in the embodiment of the present invention.

In the embodiment of the invention, a user terminal receives downlink control information DCI sent by network side equipment, wherein the DCI comprises DAI, if the DCI is used for scheduling physical downlink shared channel PDSCH transmission for hybrid automatic repeat request acknowledgement HARQ-ACK feedback based on a transport block TB, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the TB, and if the DCI is used for scheduling PDSCH transmission for HARQ-ACK feedback based on a code block group CBG, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the CBG; and the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI. As DAIs corresponding to PDSCH transmission based on CBG and PDSCH transmission based on TB are respectively counted and counted, errors can not occur when the user terminal determines the sent HARQ-ACK feedback codebook according to the DAIs, errors caused when two sub-codebooks are used for carrying out HARQ-ACK feedback can be avoided, the correctness of the dynamic codebook under the condition of using the two sub-codebooks for feedback is ensured, and the reliable performance of the system is further ensured.

Drawings

FIG. 1 is a schematic diagram of a network architecture to which embodiments of the present invention are applicable;

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

FIG. 3 is a schematic diagram of an indication of a DAI provided by an embodiment of the present invention;

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

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

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

fig. 7 is a structural diagram of a user equipment according to an embodiment of the present invention;

fig. 8 is a structural diagram of a network side device according to an embodiment of the present invention;

fig. 9 is a block diagram of another ue according to an embodiment of the present invention;

fig. 10 is a block diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic diagram of a network structure to which the embodiment of the present invention is applicable, and as shown in fig. 1, the network structure includes a User terminal (UE) 11 and a network-side Device 12, where the User terminal 11 may be a terminal-side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and it should be noted that a specific type of the User terminal 11 is not limited in the embodiment of the present invention. The network side device 12 may be a base station, for example: macro station, LTE eNB, 5G NR NB, etc.; the network side device 12 may also be a small station, such as a Low Power Node (LPN) pico, a femto, or the network side device 12 may be an Access Point (AP); the base station may also be a network node that is composed of a Central Unit (CU) and a plurality of Transmission Reception Points (TRPs) whose management is and controls. It should be noted that the specific type of the network-side device 12 is not limited in the embodiment of the present invention.

Referring to fig. 2, fig. 2 is a flowchart of a method for indicating a DAI according to an embodiment of the present invention, as shown in fig. 2, including the following steps:

201. a user terminal receives DCI sent by network side equipment, wherein the DCI comprises DAI, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on TB, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on TB, and if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on CBG, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on CBG;

202. and the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI.

In addition, the DCI may be a DCI for scheduling any time domain resource for transmission, for example: a subframe or slot (slot) or mini-slot (mini-slot), etc.

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

In addition, the ue determines the HARQ-ACK feedback codebook to be transmitted according to the DAI, where the downlink condition allocated to the ue by the network side device is determined according to the DAI included in the DCI, for example: the network side device schedules the PDSCH transmission to the user or indicates the information of SPS service release, so that the user terminal may perform corresponding HARQ-ACK feedback according to the downlink transmission actually received in the feedback window, for example: and the user terminal determines the size of the transmitted HARQ-ACK feedback codebook according to the DAI in the DCI of the last received CBG-based PDSCH transmission in the feedback window, and determines the sequence and the state of each bit in the transmitted HARQ-ACK feedback codebook according to the DAI in each received CBG-based PDSCH transmission.

In addition, the HARQ-ACK feedback codebook transmitted above may be a HARQ-ACK feedback codebook that the user equipment needs to transmit to the network side device.

Through the steps, the DAI sequencing and counting can be respectively carried out on the PDSCH transmission based on the CBG and the PDSCH transmission based on the TB. For example: it may be that, in case CBG transmission is configured, DAI ordering and counting are performed on CBG-based PDSCH transmission and TB-based PDSCH transmission through the above steps, respectively, that is, DAI ordering and counting are performed separately for CBG-based PDSCH transmission and DAI ordering and counting are performed separately for TB-based PDSCH transmission. Therefore, when the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI, errors can not occur, so that errors caused when two sub-codebooks are used for carrying out HARQ-ACK feedback can be avoided, the correctness of the dynamic codebook under the condition of using the two sub-codebooks for feedback is ensured, and the reliable performance of the system is further ensured.

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

C-DAI and T-DAI.

The statistics of the C-DAI may be that, in a feedback window, statistics is performed according to an order (first in generating order of carrier index and the in generating order of PDCCH detecting opportunity index) of increasing carrier index and then increasing PDCCH detecting opportunity index, so that the user terminal may determine, by using the C-DAI, a total number of PDCCH transmissions corresponding to scheduled PDSCH transmissions or PDCCH detecting opportunities or DCI scheduling PDSCH transmissions or DCI indicating SPS resource release until a current carrier and a current PDCCH detecting opportunity. The above sequence of increasing the carrier index and then increasing the PDCCH detection opportunity index may be understood as that, when the same time domain resource (subframe or slot) in multiple carriers is scheduled for downlink transmission, the PDCCH detection opportunity on the carrier with the carrier index ordered in the front is counted first, and then the PDCCH detection opportunity on the carrier with the carrier index ordered in the back is counted when the C-DAI is counted. For example: both slot n +1 of carrier 1 and slot n +1 of carrier 2 are PDCCH detection opportunities (for example, PDSCH transmission is scheduled), then the C-DAI in the DCI corresponding to slot n +1 of carrier 1 is counted first, and the C-DAI in the DCI corresponding to slot n +1 of carrier 2 is counted again, that is, the value of the C-DAI in the DCI corresponding to slot n +1 of carrier 1 is greater than the value of the C-DAI in the DCI corresponding to slot n +1 of carrier 2 by 1. And 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, what is counted by the C-DAI is the number of PDCCHs transmitted in a PDCCH detection opportunity or the cumulative number of PDCCH transmissions corresponding to the DCI indicating SPS resource release, when there is cross-slot scheduling, multiple PDCCHs may be transmitted in one PDCCH detection opportunity, and there may be PDCCH transmissions in the same time slot, but the corresponding PDSCHs are not in the same time slot. For example: and the slot n +1 schedules PDSCH transmission in slot n +2 and slot n +3, so that the slot n +1 comprises two PDCCHs, one of the DCIs is used for scheduling PDSCH transmission in slot n +2, the other DCI is used for scheduling PDSCH transmission in slot n +3, and the C-DAI corresponding to slot n +3 is 1 larger 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, when the T-DAI is counted, the order of increasing the carrier index and then increasing the PDCCH detection opportunity index may not be required. For example: and slot n +1 of carrier 1 and slot n +1 of carrier 2 both have PDCCH detection opportunities (for example, PDSCH transmission is scheduled), and the T-DAI in the DCI corresponding to slot n +1 of carrier 1 and the T-DAI in the DCI corresponding to slot n +1 of carrier 2 have the same value. Preferably, the T-DAI is counted as the number of PDCCHs transmitted in a PDCCH detection opportunity or the total number of PDCCH transmissions corresponding to the DCI indicating SPS resource release, when there is cross-slot scheduling, multiple PDCCHs may be transmitted in one PDCCH detection opportunity, and there may be PDCCH transmissions in the same time slot, but the corresponding PDSCHs are not in the same time slot. For example: and the slot n +1 schedules the PDSCH transmission in slot n +2 and slot n +3, so that the slot n +1 comprises two PDCCHs, one of the DCIs is used for scheduling the PDSCH transmission in slot n +2, the other DCI is used for scheduling the PDSCH transmission in slot n +3, and at the moment, the T-DAI values corresponding to the PDSCH in slot n +3 and slot n +2 are the same.

In this embodiment, the number of PDCCH transmissions corresponding to DCI for scheduling PDSCH transmission or scheduling PDSCH transmission indicating different situations or DCI for SPS resource release may be represented by the C-DAI and the T-DAI, so as to facilitate HARQ-ACK feedback of the user equipment.

the C-DAI is as follows: in the feedback window, according to the sequence of increasing the carrier index first and then increasing the PDCCH detection opportunity index, the sum of the PDCCH numbers corresponding to the first DCI format for scheduling PDSCH transmission or indicating SPS service release and the PDCCH numbers corresponding to the second DCI format for scheduling PDSCH transmission on the carrier configured to carry out HARQ-ACK feedback based on TB is carried out until the current carrier and the current PDCCH detection opportunity;

The first DCI format may be DCI format1_ 0(DCI format1_0) defined in the 5G NR system, and the second DCI format may be DCI format1_ 1(DCI format1_1) defined in the 5G NR system, which is not limited in this embodiment of the present invention, for example: the first DCI format and the second DCI format may also be two different DCI formats.

In addition, the feedback gap may be a feedback window of HARQ-ACK, which may be predefined, for example: the protocol is predefined, or the network side device is configured to the user terminal in advance, or the user terminal and the network side device are agreed in advance, and the like.

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

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

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

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

In this embodiment, when only the main carrier of the ue is configured to perform the PDSCH transmission for HARQ-ACK feedback based on the TB, the DCI for scheduling the PDSCH transmission on the main carrier includes the C-DAI and does not include the T-DAI, so that the DCI overhead can be saved.

Optionally, in the case that the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on TB, the DCI may be DCI of a fallback format or DCI on a carrier for scheduling PDSCH transmission for HARQ-ACK feedback based on TB. The DCI of the fallback format is DCI format1_0, and the DCI on the carrier for scheduling PDSCH transmission for HARQ-ACK feedback based on the TB may be DCI format1_0 or DCI format1_ 1.

For the second DCI format, reference may be made to the relevant description of the above embodiment, which is not described herein again.

Wherein the carrier herein may be a carrier configured for PDSCH transmission for HARQ-ACK feedback based on CBG.

In this embodiment, the T-DAI may not be included, so that the overhead of DCI may be saved, and in this case, the correctness of the dynamic codebook under the condition of using two sub-codebooks for feedback may be ensured only by the C-DAI, so as to ensure the reliable performance of the system.

Optionally, in a case that the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on CBG, the DCI may be DCI scheduling a non-fallback format on a carrier configured for CBG-based PDSCH transmission, and in addition, the DCI of the non-fallback format may be DCI format1_ 1.

The various embodiments described above are illustrated below by way of three specific examples:

example 1:

suppose that the base station configures two carriers for the user equipment, wherein the PDSCH transmission based on CBG is on carrier 1(CC1), the CBG size is 2, and both are scheduled by non-fallback DCI; on carrier 2(CC2) is a TB based PDSCH transmission. As shown in fig. 3, the C-DAI and the T-DAI on carrier 1 are only counted for the number of PDSCHs scheduled on carrier 1, for example, PDSCH transmission is scheduled in slot n, slot n +2, and slot n +3, then the C-DAI and the T-DAI included in the DCI in slot n are 0, the C-DAI and the T-DAI included in the DCI in slot n +2 are 1, and the C-DAI and the T-DAI included in the DCI in slot n +3 are 2. In this embodiment, the DCI on carrier 1 may not include the T-DAI information field, but only the C-DAI information field. C-DAI and T-DAI on carrier 2 are only counted aiming at the number of PDSCHs scheduled on carrier 2, for example, PDSCH transmission is scheduled in slot n +1, slot n +2 and slot n +3, then C-DAI and T-DAI contained in DCI in slot n +1 are 0, C-DAI and T-DAI contained in DCI in slot n +2 are 1, and C-DAI and T-DAI contained in DCI in slot n +3 are 2.

Example 2:

suppose the base station configures two carriers for the ue, CBG-based PDSCH transmission on carrier 1(CC1), CBG size 2, PDSCH transmission in slot n +2 scheduled by fallback DCI, and TB-based PDSCH transmission on carrier 2(CC 2). As shown in fig. 4, the C-DAI and the T-DAI of the non-fallback DCI on the carrier 1 are only counted according to the number of PDSCHs scheduled by the non-fallback DCI on the carrier 1, for example, PDSCH transmission is scheduled by the non-fallback DCI in slot n and slot n +3, the C-DAI and the T-DAI included in the DCI in slot n are 0, and the C-DAI and the T-DAI included in the DCI in slot n +3 are 1. In this embodiment, the DCI on carrier 1 may not include the T-DAI information field, but only the C-DAI information field. C-DAI and T-DAI on the carrier 2 are counted according to the number of PDSCH scheduled on the carrier 2 and PDSCH transmission scheduled by the fallback DCI on the carrier 1, for example, PDSCH transmission is scheduled in slot n +1, slot n +2 and slot n +3 on the carrier 2, PDSCH transmission in slot n +2 of the carrier 1 is scheduled by the fallback DCI, then the C-DAI and T-DAI contained in the DCI in slot n +1 are 0, the C-DAI contained in the DCI in the carrier 1 in slot n +2 is 1, the T-DAI is 2, the C-DAI and T-DAI contained in the DCI in the carrier 2 in slot n +2 are 2, and the C-DAI and T-DAI contained in the DCI in the carrier 2 in slot n +3 are 3.

Example 3:

assuming that the base station configures three carriers for the user equipment, the PDSCH transmission based on CBG on carrier 1(CC1), the CBG size being 2, are all scheduled by the non-fallback DCI; PDSCH transmission on carrier 2(CC2) for TB based; CBG based PDSCH transmission on carrier 3(CC3), CBG size 4, both scheduled by non-fallback DCI. As shown in fig. 5, if cross-slot scheduling is used, the C-DAI and T-DAI on carrier 1 and carrier 3 are counted with respect to the PDCCH sequence corresponding to the PDSCH scheduled on carriers 1 and 3, for example, carrier 1 schedules PDSCH transmission in slot n, slot n +2 and slot n +3, carrier 3 schedules PDSCH transmission in slot n +1, slot n +2 and slot n +3, DCI corresponding to PDSCH in slot n (transmitted in slot n-1) of carrier 1 includes C-DAI and T-DAI of 0, DCI corresponding to PDSCH in slot n +1 of carrier 3 includes C-DAI and T-DAI of 1 is 1, DCI corresponding to PDSCH in slot n +2 and slot n +3 of carrier 1 includes C-DAI and T-DAI of 2,5 and 3,5, and 3 includes DCI corresponding to PDSCH in slot n +2 and slot n +3 (both transmitted in slot n + 2) of carrier 3 includes PDSCH transmission including C-DAI and T-DAI of 2,5 and 3, and DCI including PDSCH transmission in slot n +2 (both slot n + 3) of slot n +3 include C-DAI transmission -DAI and T-DAI are 4,5 and 5, respectively.

C-DAI and T-DAI on carrier 2 are only counted aiming at the number of PDSCHs scheduled on carrier 2, for example, PDSCH transmission is scheduled in slot n +1, slot n +2 and slot n +3, then C-DAI and T-DAI contained in DCI corresponding to PDSCH in slot n +1 are 0, C-DAI and T-DAI contained in DCI corresponding to PDSCH in slot n +2 are 1, and C-DAI and T-DAI contained in DCI corresponding to PDSCH in slot n +3 are 2.

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

In the embodiment of the invention, a user terminal receives downlink control information DCI sent by network side equipment, wherein the DCI comprises DAI, if the DCI is used for scheduling physical downlink shared channel PDSCH transmission for hybrid automatic repeat request acknowledgement HARQ-ACK feedback based on a transport block TB, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the TB, and if the DCI is used for scheduling PDSCH transmission for HARQ-ACK feedback based on a code block group CBG, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the CBG; and the user terminal determines the sent HARQ-ACK feedback codebook according to the DAI. As DAIs corresponding to PDSCH transmission based on CBG and PDSCH transmission based on TB are respectively counted and counted, errors can not occur when the user terminal determines the HARQ-ACK feedback codebook according to the DAIs, errors caused when two sub-codebooks are used for carrying out HARQ-ACK feedback can be avoided, the correctness of the dynamic codebook under the condition of using the two sub-codebooks for feedback is ensured, and the reliable performance of the system is further ensured.

Referring to fig. 6, fig. 6 is a flowchart of another method for indicating a DAI according to an embodiment of the present invention, as shown in fig. 6, including the following steps:

601. and sending DCI to the user terminal, wherein the DCI comprises DAI, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on TB, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on TB, if the DCI is used for scheduling PDSCH transmission which carries out HARQ-ACK feedback based on CBG, the DAI only counts the PDSCH transmission which carries out HARQ-ACK feedback based on CBG, and the DAI is used for determining a sent HARQ-ACK feedback codebook by the user terminal.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

It should be noted that, this embodiment is used as an implementation of the network side device corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to the relevant description of the embodiment shown in fig. 2, so that, in order to avoid repeated description, the embodiment is not described again, and the same beneficial effects may also be achieved.

Referring to fig. 7, fig. 7 is a structural diagram of a user terminal according to an embodiment of the present invention, and as shown in fig. 5, a user terminal 700 includes:

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

a determining module 702, configured to determine the sent HARQ-ACK feedback codebook according to the DAI.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

It should be noted that, in this embodiment, the user terminal 700 may be a user terminal of any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal 700 in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 8, fig. 8 is a structural diagram of a network side device according to an embodiment of the present invention, and as shown in fig. 8, a network side device 800 includes:

a sending module 801, configured to send DCI to a user terminal, where the DCI includes a DAI, where if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a TB, the DAI only counts PDSCH transmission for HARQ-ACK feedback based on the TB, and if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a CBG, the DAI only counts PDSCH transmission for HARQ-ACK feedback based on the CBG, and the DAI is used for the user terminal to determine a sent HARQ-ACK feedback codebook.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

It should be noted that, in this embodiment, the network-side device 800 may be a network-side device according to any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device 800 in this embodiment, so as to achieve the same beneficial effects, and details are not described here again.

Referring to fig. 9, fig. 9 is a structural diagram of another ue according to an embodiment of the present invention, and as shown in fig. 9, the ue includes: a transceiver 910, a memory 920, a processor 900, and a computer program stored on the memory 920 and executable on the processor, wherein:

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

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

alternatively, the first and second electrodes may be,

the transceiver 910 is configured to receive DCI sent by a network side device, where the DCI includes a DAI, where if the DCI is used to schedule PDSCH transmission of a physical downlink shared channel for HARQ-ACK feedback acknowledgement based on a transport block TB, the DAI only counts PDSCH transmission for HARQ-ACK feedback based on the TB, and if the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on a code block group CBG, the DAI only counts PDSCH transmission for HARQ-ACK feedback based on the CBG

The processor 900 is used to read the program in the memory 920 and execute the following processes:

The transceiver 910 may be used for receiving and transmitting data under the control of the processor 900, among other things.

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors, represented by processor 900, and memory, represented by memory 920. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

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

It should be noted that the memory 920 is not limited to be on 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:

C-DAI and T-DAI.

It should be noted that, in this embodiment, the user terminal may be a user terminal in any implementation manner in the method embodiment of the present invention, and any implementation manner of the user terminal in the method embodiment of the present invention may be implemented by the user terminal in this embodiment, and the same beneficial effects are achieved, and details are not described here.

Referring to fig. 10, fig. 10 is a structural diagram of another network-side device provided in the implementation of the present invention, as shown in fig. 10, the network-side device includes: a transceiver 1010, a memory 1020, a processor 1000, and a computer program stored on the memory 1020 and executable on the processor, wherein:

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

Among other things, a transceiver 1010 for receiving and transmitting data under the control of the processor 1000.

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

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

It should be noted that the memory 1020 is not limited to be on a network-side device, and the memory 1020 and the processor 1000 may be separated and located in different geographical locations.

Optionally, the DAI includes at least one of:

C-DAI and T-DAI.

It should be noted that, in this embodiment, the network-side device may be a network-side device in any implementation manner in the method embodiment of the present invention, and any implementation manner of the network-side device in the method embodiment of the present invention may be implemented by the network-side device in this embodiment, so as to achieve the same beneficial effects, and details are not described here.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An indication method for indicating a Downlink Assignment Indication (DAI), comprising:

a user terminal receives downlink control information DCI sent by network side equipment, wherein the DCI comprises a DAI, if the DCI is used for scheduling physical downlink shared channel PDSCH transmission for hybrid automatic repeat request acknowledgement HARQ-ACK feedback based on a transport block TB, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the TB, and if the DCI is used for scheduling PDSCH transmission for HARQ-ACK feedback based on a code block group CBG, the DAI only counts the PDSCH transmission for HARQ-ACK feedback based on the CBG;

2. The method of claim 1, wherein the DAI comprises at least one of:

the downlink allocation indication C-DAI and the total downlink allocation indication T-DAI are counted.

3. The method of claim 2, wherein, in a case that the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on TBs,

the C-DAI is as follows: in the feedback window, according to the sequence of increasing the carrier index first and then increasing the PDCCH detection opportunity index, the sum of the PDCCH numbers corresponding to the first DCI format for scheduling PDSCH transmission or indicating the downlink semi-persistent scheduling SPS service release and the PDCCH numbers corresponding to the second DCI format for scheduling PDSCH transmission on the carrier of PDSCH transmission configured to perform HARQ-ACK feedback based on TB is obtained until the current carrier and the current PDCCH detection opportunity;

4. The method of claim 2 or 3, wherein in case only a primary carrier is configured for PDSCH transmission for HARQ-ACK feedback based on TB, the DCI scheduling PDSCH transmission on the primary carrier includes the C-DAI and does not include the T-DAI.

5. The method of claim 2, wherein, in a case that the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on CBG,

6. The method of claim 2 or 5, wherein in case only one carrier is configured for PDSCH transmission for HARQ-ACK feedback based on CBG, DCI scheduling PDSCH transmission on the carrier includes the C-DAI excluding the T-DAI.

7. A method for indicating a DAI, comprising:

8. The method of claim 7, wherein the DAI comprises at least one of:

C-DAI and T-DAI.

9. The method of claim 8, wherein, in a case that the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on TBs,

10. The method of claim 8 or 9, wherein in case only a primary carrier is configured for PDSCH transmission for HARQ-ACK feedback based on TBs, DCI scheduling PDSCH transmission on the primary carrier includes the C-DAI and does not include the T-DAI.

11. The method of claim 8, wherein, in a case that the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on CBG,

12. The method of claim 8 or 11, wherein DCI scheduling PDSCH transmission on a carrier includes the C-DAI excluding the T-DAI in the event that only one carrier is configured for PDSCH transmission for HARQ-ACK feedback based on CBG.

13. A user terminal, comprising:

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

14. The user terminal of claim 13, wherein the DAI comprises at least one of:

C-DAI and T-DAI.

15. The user terminal of claim 14, wherein, in case the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback on a TB basis,

16. The user terminal of claim 14, wherein, in case the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on CBG,

17. A network-side device, comprising:

18. The network-side device of claim 17, wherein the DAI comprises at least one of:

C-DAI and T-DAI.

19. The network-side device of claim 18, wherein, where the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on TBs,

20. The network-side device of claim 18, wherein, where the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on CBG,

21. A user terminal, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor,

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

alternatively, the first and second electrodes may be,

22. The user terminal of claim 21, wherein the DAI comprises at least one of:

C-DAI and T-DAI.

23. The user terminal of claim 22, wherein, in case the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback on a TB basis,

24. The user terminal of claim 22 or 23, wherein in case only a primary carrier is configured for PDSCH transmission for HARQ-ACK feedback on a TB basis, DCI scheduling PDSCH transmission on the primary carrier includes the C-DAI and does not include the T-DAI.

25. The user terminal of claim 22, wherein, in case the DCI is used to schedule PDSCH transmission for HARQ-ACK feedback based on CBG,

26. The user terminal of claim 22 or 25, wherein in case only one carrier is configured for PDSCH transmission for HARQ-ACK feedback based on CBG, the DCI scheduling PDSCH transmission on the carrier comprises the C-DAI and does not comprise the T-DAI.

27. A network-side device, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor,

28. The network-side device of claim 27, wherein the DAI comprises at least one of:

C-DAI and T-DAI.

29. The network-side device of claim 28, wherein, where the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on TBs,

30. The network-side device of claim 28 or 29, wherein in case of PDSCH transmission with only a primary carrier configured for HARQ-ACK feedback on a TB basis, DCI scheduling PDSCH transmission on the primary carrier includes the C-DAI and does not include the T-DAI.

31. The network-side device of claim 28, wherein, where the DCI is used to schedule PDSCH transmissions for HARQ-ACK feedback based on CBG,

32. The network-side device of claim 28 or 31, wherein in case only one carrier is configured for PDSCH transmission for HARQ-ACK feedback based on CBG, the DCI scheduling PDSCH transmission on the carrier includes the C-DAI and does not include the T-DAI.

33. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the indication method of a DAI as claimed in one of claims 1 to 6, or which, when being executed by a processor, carries out the steps of the indication method of a DAI as claimed in one of claims 7 to 12.