CN113726484B

CN113726484B - HARQ-ACK feedback method, terminal equipment and network equipment for hybrid automatic repeat request response

Info

Publication number: CN113726484B
Application number: CN202010456606.1A
Authority: CN
Inventors: 李娜; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2023-04-14
Anticipated expiration: 2040-05-26
Also published as: CN113726484A; WO2021238941A1

Abstract

The application discloses a hybrid automatic repeat request-response HARQ-ACK feedback method, terminal equipment and network equipment, and belongs to the field of communication. The HARQ-ACK feedback method comprises the following steps: performing HARQ-ACK feedback on a PDSCH (physical downlink shared channel) of a target multicast or a PDSCH in a target PDSCH group according to the indication of the DCI (unicast downlink control information); wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs. According to the embodiment of the application, the multicast PDSCH of different multicast terminal equipment can perform HARQ-ACK feedback at different time and resources, so that different transmitting power is used, the effectiveness of a communication system is improved, and the feedback load of the multicast HARQ-ACK in a certain time unit can be reduced.

Description

HARQ-ACK feedback method, terminal equipment and network equipment for hybrid automatic repeat request response

Technical Field

The present application relates to the field of communications, and in particular, to a HARQ-ACK feedback method, a terminal device, and a network device.

Background

In a mobile communication system, a User Equipment (UE, also referred to as a terminal device, etc.) needs to perform Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) feedback on a Physical Downlink Shared Channel (PDSCH) or some Physical Downlink Control Channels (PDCCHs) for Downlink transmission, where the HARQ-ACK feedback is transmitted on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).

Currently, only unicast PDSCH supports HARQ-ACK, multicast PDSCH does not support HARQ-ACK feedback. In the process of implementing the present application, the inventors found that at least the following problems exist in the prior art: considering that the HARQ-ACK feedback can improve the reliability of multicast PDSCH transmission, how to support the HARQ-ACK feedback of multicast PDSCH becomes a technical problem to be solved urgently.

Disclosure of Invention

An object of the embodiments of the present application is to provide a HARQ-ACK feedback method for hybrid automatic repeat request acknowledgement, a terminal device, and a network device, so as to solve a problem that a multicast PDSCH does not support HARQ-ACK feedback.

In a first aspect, an embodiment of the present application provides a hybrid automatic repeat request acknowledgement HARQ-ACK feedback method, which is applied to a terminal device, and the method includes:

according to the indication of the DCI, carrying out HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the target PDSCH group; wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device includes:

a feedback module, configured to perform HARQ-ACK feedback on a PDSCH (physical downlink shared channel) of a target multicast or a PDSCH in a target PDSCH group according to an indication of DCI (unicast downlink control information); wherein the PDSCHs in the target PDSCH group include multicast PDSCHs.

In a third aspect, an embodiment of the present application provides a terminal device, including: a memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the method according to the first aspect.

In a fourth aspect, embodiments of the present application provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor, implement the steps of the method according to the first aspect.

In a fifth aspect, an embodiment of the present application provides a hybrid automatic repeat request acknowledgement HARQ-ACK feedback method, which is applied to a network device, and the method includes:

sending unicast downlink control information DCI to terminal equipment, wherein the unicast DCI is used for indicating the terminal equipment to perform HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group; wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

In a sixth aspect, an embodiment of the present application provides a network device, where the network device includes:

a sending module, configured to send unicast downlink control information DCI to a terminal device, where the unicast DCI is used to instruct the terminal device to perform HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group; wherein the PDSCHs in the target PDSCH group include multicast PDSCHs.

In a seventh aspect, an embodiment of the present application provides a network device, including: a memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the method according to the fifth aspect.

In an eighth aspect, the present application provides a readable storage medium, on which a program or instructions are stored, and when executed by a processor, the program or instructions implement the steps of the method according to the fifth aspect.

In the embodiment of the present application, HARQ-ACK feedback may be performed on a target multicast PDSCH or a PDSCH in a target PDSCH group including a multicast PDSCH according to an indication of unicast downlink control information DCI issued by a network device, so as to support HARQ-ACK feedback on the multicast PDSCH. Therefore, the multicast PDSCH of different multicast terminal equipment can carry out HARQ-ACK feedback on different time and resources so as to use different transmitting power, improve the effectiveness of a communication system and simultaneously reduce the feedback load of the multicast HARQ-ACK of a certain time unit.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic flowchart of a HARQ-ACK feedback method in an embodiment of the present application;

fig. 2 is a schematic diagram of a HARQ-ACK feedback process in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating another HARQ-ACK feedback process in the embodiment of the present application;

fig. 4 is a schematic diagram illustrating a process of HARQ-ACK feedback in an embodiment of the present application;

fig. 5 is a flowchart illustrating a second HARQ-ACK feedback method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal device in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a network device in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a second terminal device in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a second network device in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The technical scheme of the application can be applied to various communication systems, such as: global System for Mobile communications (GSM), code Division Multiple Access (CDMA) System, wideband Code Division Multiple Access (WCDMA), general Packet Radio Service (GPRS), long Term evolution/enhanced Long Term evolution (LTE-a), NR, and the like.

User Equipments (UEs), which may be Terminal equipments such as Mobile phones (or called "cellular" phones) and computers with Terminal equipments, for example, mobile devices that may be portable, pocket, hand-held, built-in computers or vehicle-mounted, exchange languages and/or data with a Radio Access Network (RAN), may also be referred to as Terminal equipments (Mobile terminals), mobile user equipments, etc., and may communicate with one or more core networks via the Radio Access Network.

The network device, which may also be referred to as a Base Station, may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) in LTE, and a 5G Base Station (gNB).

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present application provides a HARQ-ACK feedback method for hybrid automatic repeat request acknowledgement, which is executed by a terminal device, and the method includes the following steps:

step 101: performing HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group according to the indication of the Downlink Control Information (DCI); wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

Optionally, before the step 101 of the HARQ-ACK feedback method according to the embodiment of the present application, the following may also be included:

grouping PDSCHs to obtain one or more PDSCH groups, wherein the one or more PDSCH groups comprise at least one first PDSCH group, and PDSCHs in the first PDSCH group comprise multicast PDSCHs; wherein the target multicast PDSCH is included in the at least one first PDSCH group, or the target PDSCH group includes the at least one first PDSCH group.

In the embodiment of the present application, the PDSCH may be grouped to accurately determine the PDSCH group where the multicast PDSCH is located. In this way, when performing HARQ-ACK feedback on PDSCH in at least one first PDSCH group including multicast PDSCH according to the instruction of unicast DCI, HARQ-ACK feedback on the target multicast PDSCH or PDSCH in the target PDSCH group can be achieved.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the step of grouping the PDSCHs to obtain one or more PDSCH groups may be specifically performed as one of the following:

(1) And grouping the PDSCHs according to Radio Network Temporary Identifiers (RNTIs) corresponding to the PDSCHs to obtain one or more PDSCH groups.

(2) Grouping PDSCHs according to radio network temporary identifiers RNTIs corresponding to the DCI to obtain one or more PDSCH groups; wherein the DCI is used to schedule the PDSCH.

It can be understood that in the embodiment of the present application, the PDSCHs may be divided into different groups according to the RNTI corresponding to the PDSCH, i.e. the RNTI of the scrambled PDSCH, or according to the RNTI corresponding to the DCI, i.e. the RNTI of the scrambled DCI CRC (such as DCI with X-RNTI or DCI with CRC scrambled X-RNTI). In one example, the PDSCH scrambled by unicast RNTI such as Cell radio network temporary identity (Cell RNTI, C-RNTI), modulation and coding scheme Cell RNTI (MCS-C-RNIT), or configuration scheduled radio network temporary identity (CS-RNTI) is a group, such as group 0; the PDSCHs scrambled by g-RNTI (groupRNTI) are grouped, such as group 1. In other words, the multicast PDSCH is scrambled using g-RNTI and the unicast PDSCH is scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI. Further, HARQ-ACK feedback for PDSCH of the group (e.g., group 1) where the multicast PDSCH is located may be triggered by unicast DCI. In another example, after grouping PDSCHs, unicast PDSCHs correspond to a group, e.g., group 0; each g-RNTI corresponds to one group, for example, different g-RNTIs correspond to different groups, for example,

groups

1, 2, \ 8230; or only multicast PDSCH has corresponding PDSCH groups, unicast PDSCH is not grouped or does not belong to any one group.

In the embodiment of the present application, the multicast PDSCH in the target multicast PDSCH or target PDSCH group is a PDSCH transmitted to a group of terminal devices through the same physical resource, and may also be referred to as multicast PDSCH or broadcast PDSCH.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the scheme described in step 101 may be implemented in different manners, including but not limited to the following specific embodiments:

detailed description of the preferred embodiment

In the first embodiment, the unicast DCI includes a HARQ-ACK trigger indication field; further, the step 101 may be specifically executed as follows:

and performing HARQ-ACK feedback on the target multicast PDCSH or the PDSCH in the target PDSCH group according to the HARQ-ACK triggering indication domain, wherein the HARQ-ACK triggering indication domain is used for performing explicit triggering indication on the HARQ-ACK feedback of the target multicast PDSCH or the PDSCH in the target PDSCH group.

It can be understood that when the unicast DCI is configured with the HARQ-ACK trigger indication field, HARQ-ACK feedback can be performed on the PDSCH in the target multicast PDCSH or the target PDSCH group according to the explicit indication of the HARQ-ACK trigger indication field.

Further optionally, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group does not include the HARQ-ACK trigger indication field.

The following describes details of the unicast DCI including the HARQ-ACK trigger indication field with reference to fig. 2.

As shown in fig. 2, PDSCH1 and PDSCH2 are multicast PDSCH scheduled by DCI1 and DCI2, respectively, and PDSCH3 is unicast PDSCH scheduled by DCI 3. For multicast PDSCH scheduling, HARQ-ACK feedback timing indication, PUCCH resource indication, and Transmit Power Control (TPC) indication are not included in the corresponding multicast DCI, but DAI indications are included, as shown, DAI =1 and DAI =2 are respectively indicated. For the time unit of HARQ-ACK feedback of the multicast PDSCH, indicated by the unicast DCI of the UE, as shown in the figure, the unicast DCI includes a HARQ-ACK trigger indication field (e.g. T) for triggering the UE to feed back HARQ-ACK feedback of the previously scheduled multicast PDSCH (e.g. triggering HARQ-ACK feedback of the multicast PDSCH from the last trigger DCI to the trigger DCI), for example, T =1 indicates that the UE is triggered to feed back HARQ-ACK feedback of the multicast PDSCH, whereas T =0 indicates that the UE is not triggered to feed back HARQ-ACK feedback of the multicast PDSCH, as shown in the figure, T =1 in DCI3 indicates that the HARQ-ACK feedback of the multicast PDSCH is triggered, and k1=2 indicates that the UE determines to feed back HARQ-ACK of the multicast PDSCH1 and PDSCH2 at time slot n +2 according to the indication of DCI 3. And unicast HARQ-ACK of PDSCH3, optionally, determining PUCCH resources for feeding back HARQ-ACK according to PUCCH Resource Indication (PRI) Indication of DCI3, and determining PUCCH transmission power according to TPC Indication of DCI 3.

In this example, the HARQ-ACK trigger indication field is included in unicast DCI (the HARQ-ACK trigger indication field is not included in multicast DCI), and a network device (such as a base station) may explicitly indicate whether to trigger the UE to feed back HARQ-ACK for multicast PDSCH, which increases scheduling flexibility.

Further optionally, when the multicast PDSCH is divided into different PDSCH groups, in the corresponding HARQ-ACK feedback method in this embodiment, the HARQ-ACK feedback of the PDSCH corresponding to which group or groups containing the multicast PDSCH may be triggered according to the indication of the unicast DCI.

Detailed description of the invention

In the second embodiment, the unicast DCI does not include the HARQ-ACK trigger indication field; further, the unicast DCI is used to implicitly trigger an indication of HARQ-ACK feedback for the target multicast PDSCH or PDSCHs in the target PDSCH group.

It can be understood that when the unicast DCI does not configure the HARQ-ACK trigger indication field, HARQ-ACK feedback may be performed on the PDSCH in the target multicast PDCSH or the target PDSCH group according to the implicit indication of the unicast DCI.

In one example, the high layer configures a corresponding HARQ-ACK feedback mode, the UE does not feed back HARQ-ACK after receiving the multicast PDSCH, until the UE receives unicast DCI, the unicast DCI triggers the UE to feed back HARQ-ACK of the multicast PDSCH, and the UE determines, according to an indication of the unicast DCI, a time unit, a resource, and the like for feeding back HARQ-ACK feedback of the multicast PDSCH.

The following describes in detail the unicast DCI without including the HARQ-ACK trigger indication field in conjunction with fig. 3.

As shown in fig. 3, PDSCH1 and PDSCH2 are multicast PDSCH scheduled by DCI1 and DCI2, respectively, UE1 and UE2 are both multicast UEs, PDSCH3-1 is unicast PDSCH of UE1 scheduled by DCI3-1, and PDSCH3-2 is unicast PDSCH of UE2 scheduled by DCI 3-2. For multicast PDSCH scheduling, HARQ-ACK feedback timing indication, PUCCH resource indication and TPC indication are not included in the corresponding multicast DCI, but DAI indication is included, as shown, DAI =1 and DAI =2 are indicated, respectively. For the time unit fed back by the multicast PDSCH, indicated by the unicast DCI of the UE individually, as shown in the figure, DCI3-1 of UE1 indicates k1=1, the UE determines to feed back HARQ-ACK of multicast PDSCH1 and PDSCH2 at slot n +1 and HARQ-ACK of unicast PDSCH3-1 according to the indication of DCI3-1, optionally, PUCCH resources for feeding back HARQ-ACK may also be determined according to PRI indication of DCI3-1, and power of PUCCH transmission may also be determined according to TPC indication of DCI 3-1. For UE2, UE2 may determine the time unit, PUCCH resource and transmission power for feeding back HARQ-ACK for PDSCH1 and PDSCH2 according to the indication of DCI3-2, as shown in the figure, the UE feeds back HARQ-ACK for multicast PDSCH1 and multicast PDSCH2 and unicast PDSCH3-2 in slot n + 2.

In this example, the unicast DCI does not need to include the HARQ-ACK trigger indication field, i.e., the unicast DCI may be used to trigger HARQ-ACK feedback of the multicast PDSCH (or the multicast PDSCH may be divided into one PDSCH group, which may be used to trigger the PDSCH in the PDSCH group where the multicast PDSCH is located), but the default unicast DCI always triggers HARQ-ACK feedback of the previously scheduled multicast PDSCH (e.g., triggering the multicast PDSCH from the last unicast DCI to the current unicast DCI) or the PDSCH in the PDSCH group where the multicast PDSCH is located (e.g., triggering the PDSCH from the last unicast DCI to the multicast PDSCH in the multicast PDSCH group between the current unicast DCI). The DAI of the multicast PDSCH is indicated in the DCI corresponding to the multicast PDSCH, so that the problem that the number of HARQ-ACK bits or the corresponding relation between the HARQ-ACK bit information and the PDSCH is fuzzy in multicast feedback is solved, meanwhile, a HARQ-ACK feedback time unit of the multicast PDSCH can be obtained according to the indication of unicast DCI, HARQ-ACK feedback of different multicast UEs can be fed back on different time units or PUCCH resources, and the problem of HARQ-ACK feedback load or PUCCH resource conflict of a certain time unit is solved.

Optionally, in the HARQ-ACK feedback method of the embodiment of the present application, when performing HARQ-ACK feedback on a target multicast PDSCH or a PDCSH in a target PDSCH group including the multicast PDSCH according to the indication of the unicast DCI, a corresponding explicit indication manner of the specific embodiment or a corresponding implicit indication manner of the specific embodiment may be used to determine according to a specific signaling issued by the network side. Specifically, before the step 101, the following may be further included:

receiving first signaling from a network device; wherein the first signaling is used for indicating that the unicast DCI is used for performing explicit triggering indication or implicit triggering indication on HARQ-ACK feedback of the target multicast PDSCH or PDSCHs in the target PDSCH group.

Optionally, the first signaling may be a higher layer signaling.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the unicast DCI may be DCI scheduling a PDSCH or DCI not scheduling a PDSCH.

Optionally, in the HARQ-ACK Feedback method according to this embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group includes a New Feedback Indicator (NFI) field.

It can be understood that, in an aspect, the new feedback indication NFI field is included in the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group, and may be specified by a protocol.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the following may also be included:

before the step 101, receiving a second signaling from the network device, where the second signaling is used to indicate whether a multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group includes a new feedback indication NFI field.

It can be understood that, on the other hand, the network device may configure whether the multicast DCI corresponding to the multicast PDSCH in the target multicast PDSCH or the target PDSCH group includes the new feedback indication NFI field.

Optionally, the second signaling may be higher layer signaling.

prior to said step 101, receiving third signalling from the network device; wherein the third signaling is used for indicating whether a New Feedback Indication (NFI) field is contained in the unicast DCI.

It is to be understood that whether the new feedback indication NFI field is included in the unicast DCI corresponding to the unicast PDSCH described above may be configured by the network device.

Further optionally, when the unicast DCI includes a new feedback indication NFI field, the NFI field in the unicast DCI is used to indicate the target multicast PDSCH or the NFI corresponding to the target PDSCH group.

It can be understood that whether only new feedback is transmitted or feedback before retransmission is also needed can be indicated by a flipping manner (for example, NFI is represented by 1 bit, and is converted from 0 to 1, or is converted from 1 to 0, and both are considered to be flipped, and if the value is not changed, the flipping is not considered to occur). If NFI is turned over, indicating that all feedback of DCI turned over by NFI aiming at the target PDSCH group or the target multicast PDSCH is discarded, and only transmitting the unicast DCI and the HARQ-ACK feedback of the PDSCH scheduled aiming at the target PDSCH group or the target multicast PDSCH; if the NFI is not turned, all HARQ-ACK feedbacks for the target PDSCH group or the target multicast PDSCH need to be transmitted since the last NFI turning, that is, the HARQ-ACK feedbacks with the same NFI value are all effective.

Optionally, in the HARQ-ACK feedback method according to this embodiment of the application, the unicast DCI includes a first Downlink Assignment Index (DAI), where the first DAI is used for the target multicast PDSCH or the target PDSCH group.

It is to be appreciated that the DAI for the target PDSCH group or the target multicast PDSCH may be included in the unicast DCI configured by the network device.

In one example, as shown in fig. 4, PDSCH1, PDSCH2 and PDSCH4 are multicast PDSCH scheduled by DCI1, DCI2 and DCI4, respectively, in one-to-one correspondence, and PDSCH3 is unicast PDSCH scheduled by DCI 3. For scheduling of multicast PDSCH, HARQ-ACK feedback timing indication, PUCCH resource indication and TPC indication are not included in the corresponding multicast DCI, but DAI indication is included, as shown, DAI =1 and DAI =2 are indicated respectively. The multicast DCI further includes an NFI indication, as shown in the figure, NFI =0 in DCI1, NFI =0 in DCI2, and a time unit for feedback of the multicast PDSCH is indicated by a unicast DCI of the UE, as shown in the figure, the unicast DCI includes a HARQ-ACK trigger indication field (e.g., T) for triggering the UE to feed back HARQ-ACK feedback of a previously scheduled multicast PDSCH (e.g., all previously scheduled multicast PDSCHs and determining which PDSCHs are included according to whether NFI flips, i.e., all multicast PDSCHs after NFI last flips), e.g., T =1 indicates that the UE feeds back HARQ-ACK feedback of the multicast PDSCH, whereas T =0 indicates that the UE does not trigger feedback of HARQ-ACK feedback of the multicast PDSCH, as shown in the figure, T =1 in DCI3 indicates that the HARQ-ACK feedback of the multicast PDSCH is triggered, and k1=2 indicates that the UE determines to feed back HARQ-ACK feedback of the multicast PDSCH at slot n +2 according to TPC 3, and NFI in DCI1 and DCI2 are both equal to 0, and are not flipped (assuming that DCI 1=1 of the multicast PDSCH before DCI1, then feedback of PDSCH, then the UE and PUCCH and the time unit of the HARQ-ACK feedback indicates that HARQ-ACK feedback of the HARQ-ACK feedback of PDSCH and PUCCH of PDSCH are transmitted according to PUCCH, and the HARQ-ACK feedback. In the figure, T =1 in DCI5 triggers HARQ-ACK feedback for multicast PDSCH, and NFI =1 in multicast DCI4 (flipped over with respect to NFI =1 in DCI 2), so the UE will feed back HARQ-ACK for multicast PDSCH4 at n +5 slots (due to NFI flipping, the UE will not feed back HARQ-ACK for multicast PDSCH1 and PDSCH2, and if NFI =0 in DCI4, the UE feeds back HARQ-ACK for multicast PDSCH1, PDSCH2, and PDSCH 4).

Optionally, the unicast DCI may further include a DAI for indicating the total number of triggered multicast PDSCHs, for example, indicating DAI =2 in DCI3, and in combination with DCI1 and DCI2, the UE may determine that the number of multicast PDSCHs that need to be fed back in a time slot n +2 is 2, that is, the UE may determine whether the UE missed detects the last one or more multicast DCIs according to DCI1 and the DAI in DCI2 that schedule the multicast PDSCH and the DAI in DCI3, for example, if the DAI =3 is indicated in DCI3, the UE may determine that at least the last multicast DCI is missed.

In this example, the unicast DCI includes a HARQ-ACK triggering indication (the multicast DCI does not include the HARQ-ACK triggering indication), the DCI of the multicast PDSCH includes an NFI, the NFI is inverted, and it indicates that the UE does not need to feed back the HARQ-ACK of the multicast PDSCH before the inversion (it needs to be noted that, when the NFI is inverted, the DAI of the corresponding multicast PDSCH should be counted again), and the network device (for example, the base station) may explicitly indicate whether to trigger the UE to feed back the HARQ-ACK of the multicast PDSCH, and determine which HARQ-ACK feedback of the multicast PDSCH is triggered according to whether the NFI is inverted, thereby increasing scheduling flexibility.

Optionally, in this example, the unicast DCI may also include an NFI indication field for indicating scheduling of the multicast PDSCH, for example, as NFI =0 in DCI3 in the figure, which is the same as NFI in DCI1 and DCI2, the UE is triggered to feed back HARQ-ACK of PDSCH1 and PDSCH 2. If NFI =0 in DCI5 and NFI =1 in DCI4 in the figure, it indicates that the UE missed the DCI of at least one multicast PDSCH after DCI 4. The unicast DCI comprises the NFI and/or the DAI of the multicast PDSCH to indicate the bit number corresponding to the multicast HARQ-ACK, so that the problem of inconsistent understanding of the size of the codebook can be avoided.

Optionally, in this example, the PDSCH is divided into different groups according to DCI or RNTI of the PDSCH, for example, the multicast PDSCH belongs to one group, the unicast DCI is used to trigger HARQ-ACK feedback of the PDSCH in the multicast PDSCH group, and the DAI in the multicast DCI or the DAI in the unicast DCI for indicating the multicast PDSCH, and the NFI is an indication performed on the PDSCH in the multicast PDSCH group.

Optionally, in the HARQ-ACK feedback method in this embodiment of the present application, when HARQ-ACK feedback of a multicast PDSCH and/or HARQ-ACK feedback of a unicast PDSCH, triggering of HARQ-ACK feedback of the multicast PDSCH may be per priority triggering or non-priority triggering, including but not limited to the following specific embodiments:

detailed description of the preferred embodiment

In the first embodiment, the multicast PDSCH corresponds to a HARQ-ACK feedback priority.

Further, the unicast DCI may satisfy one of:

(1) The HARQ-ACK feedback priority corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH; or the HARQ-ACK feedback priority of the PDSCH corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH.

In one example, when the HARQ-ACK feedback priority corresponding to the multicast PDSCH and the HARQ-ACK feedback priority corresponding to the unicast PDSCH both have only one or no priority, the HARQ-ACK feedback of the multicast PDSCH may be triggered explicitly or implicitly according to the above embodiments. In another example, if the unicast PDSCH corresponds to multiple HARQ-ACK priorities, the triggering of HARQ-ACK feedback for the multicast PDSCH may be unicast DCI indicating a particular priority (e.g., high priority or low priority) or having the same HARQ-ACK feedback priority as the multicast PDSCH, triggering the UE to feed back HARQ-ACK feedback for the multicast PDSCH; that is, the unicast DCI indicating non-specific or having a different HARQ-ACK feedback priority from the multicast PDSCH does not trigger the UE to feed back the HARQ-ACK feedback of the multicast PDSCH, or the UE may ignore the trigger indication of the HARQ-ACK feedback of the multicast PDSCH in the unicast DCI at this time.

(2) The unicast DCI corresponds to any HARQ-ACK feedback priority; or the PDSCH corresponding to the unicast DCI corresponds to any HARQ-ACK feedback priority.

In one example, when the HARQ-ACK feedback priority corresponding to the multicast PDSCH and the HARQ-ACK feedback priority corresponding to the unicast PDSCH both have one or no priority, the triggering of the HARQ-ACK feedback for the multicast PDSCH may be triggered without priority. In another example, if the unicast PDSCH corresponds to multiple HARQ-ACK priorities, the triggering of HARQ-ACK feedback for the multicast PDSCH, the unicast DCI indicating any HARQ-ACK feedback priority, may trigger the UE to feed back HARQ-ACK feedback for the multicast PDSCH, i.e., the unicast DCI of any priority may trigger HARQ-ACK feedback for the multicast PDSCH.

It should be noted that the multicast PDSCH in the first embodiment includes the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

Detailed description of the preferred embodiment

In the second embodiment, the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities. Further, the unicast DCI is used to indicate one of:

(1) HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority; wherein the first HARQ-ACK feedback priority is one priority indicated by the unicast DCI in the plurality of HARQ-ACK feedback priorities.

In one example, when the multicast PDSCH corresponds to multiple different HARQ-ACK feedback priorities and there is only one HARQ-ACK feedback priority corresponding to the unicast PDSCH, and the unicast DCI triggers HARQ-ACK feedback of the multicast PDSCH, the UE may indicate which priority HARQ-ACK feedback is triggered (i.e., the first HARQ-ACK feedback priority).

In another example, when there are multiple different HARQ-ACK feedback priorities for both multicast PDSCH and unicast PDSCH, the HARQ-ACK feedback for multicast PDSCH triggered by unicast DCI may indicate which priority HARQ-ACK feedback is triggered (i.e., the first HARQ-ACK feedback priority). Or unicast DCI indicating another HARQ-ACK feedback priority different from the first HARQ-ACK feedback priority is used for triggering HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority, for example, unicast DCI indicating high priority is used for triggering HARQ-ACK of the multicast PDSCH corresponding to high priority, and unicast DCI indicating low priority is used for triggering HARQ-ACK of the multicast PDSCH corresponding to low priority.

(2) And the HARQ-ACK feedback of the multicast PDSCH corresponding to any HARQ-ACK feedback priority in the plurality of HARQ-ACK feedback priorities.

In one example, when there are multiple different HARQ-ACK feedback priorities for the multicast PDSCH and only one HARQ-ACK feedback priority for the unicast PDSCH, the unicast DCI may directly trigger HARQ-ACK feedback for the multicast PDSCH of all priorities without indicating which priority HARQ-ACK feedback is triggered.

(3) HARQ-ACK feedback of the multicast PDSCH corresponding to the second HARQ-ACK feedback priority; wherein the PDSCH corresponding to the unicast DCI or the unicast DCI corresponds to a third HARQ-ACK feedback priority.

In one example, when the multicast PDSCH and the unicast PDSCH both correspond to different HARQ-ACK feedback priorities, and when the unicast DCI triggers HARQ-ACK feedback of the multicast PDSCH, the unicast DCI of the third HARQ-ACK feedback priority may be indicated to trigger HARQ-ACK feedback of the multicast PDSCH of the second HARQ-ACK feedback priority only; optionally, if the second HARQ-ACK feedback priority is the same as the third HARQ-ACK feedback priority, it indicates that the unicast DCI can only trigger HARQ-ACK feedback of the multicast PDSCH with the same HARQ-ACK feedback priority; otherwise, when the third HARQ-ACK feedback priority is different from the second HARQ-ACK feedback priority, the unicast DCI may not trigger the UE to feed back the HARQ-ACK feedback of the multicast PDSCH, or the UE ignores the trigger indication of the HARQ-ACK feedback of the multicast PDSCH at this time.

It should be noted that the multicast PDSCH in the second embodiment includes the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

Referring to fig. 5, an embodiment of the present application provides a HARQ-ACK feedback method for hybrid automatic repeat request acknowledgement, which is executed by a network device, and the method includes the following steps:

step 201: sending unicast downlink control information DCI to terminal equipment, wherein the unicast DCI is used for indicating the terminal equipment to perform HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group; wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

In the embodiment of the present application, a unicast downlink control information DCI may be sent to a terminal device, so that the terminal device may perform HARQ-ACK feedback on a PDSCH in a target multicast physical downlink shared channel PDSCH or a target PDSCH group including a multicast PDSCH according to an indication of the unicast DCI, so as to support HARQ-ACK feedback on the multicast PDSCH. Therefore, the multicast PDSCH of different multicast terminal equipment can carry out HARQ-ACK feedback on different time and resources so as to use different transmitting power, improve the effectiveness of a communication system and simultaneously reduce the feedback load of the multicast HARQ-ACK of a certain time unit.

Optionally, in the HARQ-ACK feedback method according to this embodiment of the present application, the target multicast PDSCH includes at least one first PDSCH group, or the target PDSCH group includes at least one first PDSCH group, where a PDSCH in the first PDSCH group includes a multicast PDSCH; wherein the at least one first PDSCH group is included in one or more PDSCH groups, the one or more PDSCH groups being derived based on grouping PDSCHs.

In the embodiment of the present application, the PDSCH may be grouped to accurately determine the PDSCH group where the multicast PDSCH is located. Thus, when the terminal equipment performs HARQ-ACK feedback on the PDSCH in at least one first PDSCH group containing the multicast PDSCH according to the indication of the unicast DCI by issuing the unicast DCI, the HARQ-ACK feedback on the target multicast PDSCH or the PDSCH in the target PDSCH group can be realized.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the one or more PDSCH groups are obtained by grouping PDSCHs based on one of the following:

radio network temporary identifier RNTI corresponding to PDSCH; radio network temporary identifier RNTI corresponding to the DCI; wherein the DCI is used to schedule the PDSCH.

It can be understood that in the embodiment of the present application, the PDSCHs may be divided into different groups according to the RNTI corresponding to the PDSCH, i.e. the RNTI of the scrambled PDSCH, or according to the RNTI corresponding to the DCI, i.e. the RNTI of the scrambled DCI CRC (such as DCI with X-RNTI or DCI with CRC scrambled X-RNTI). In one example, the PDSCHs scrambled by RNTI such as C-RNTI, MCS-C-RNIT, CS-RNTI, or the like are in a group, such as group 0; the PDSCHs scrambled by the g-RNTI are grouped into one group, such as group 1. In other words, the multicast PDSCH is scrambled using g-RNTI and the unicast PDSCH is scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI. Further, HARQ-ACK feedback for PDSCH of the group (e.g., group 1) where the multicast PDSCH is located may be triggered through unicast DCI. In another example, after grouping the PDSCHs, the unicast PDSCHs correspond to a group, e.g., group 0; each g-RNTI corresponds to one group, for example, different g-RNTIs correspond to different groups, for example,

groups

1, 2, \\ 8230; or only multicast PDSCH has corresponding PDSCH groups, unicast PDSCH is not grouped or does not belong to any one group.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the unicast DCI includes an HARQ-ACK trigger indication field; wherein, the HARQ-ACK trigger indication field is used for carrying out explicit trigger indication on HARQ-ACK feedback of PDCSH in the target PDSCH group by the target multicast PDCSH.

It can be understood that, when the configuration unicast DCI includes the HARQ-ACK trigger indication field, the terminal device may be explicitly indicated by the HARQ-ACK trigger indication field to perform HARQ-ACK feedback on the PDSCH in the target multicast PDCSH or the target PDSCH group.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the unicast DCI does not include a HARQ-ACK trigger indication field; the unicast DCI is used for performing implicit trigger indication on HARQ-ACK feedback of the target multicast PDCSH or PDCSH in the target PDSCH group.

It can be understood that, when the configuration unicast DCI does not include the HARQ-ACK triggering indication field, the terminal device may perform HARQ-ACK feedback on the target multicast PDCSH or the PDSCH in the target PDSCH group through the implicit indication terminal device of the unicast DCI.

In one example, a corresponding HARQ-ACK feedback mode may be configured through a higher layer, so that the UE does not feed back HARQ-ACK after receiving the multicast PDSCH, and the unicast DCI triggers the UE to feed back HARQ-ACK of the multicast PDSCH until the UE receives the unicast DCI, and the UE determines a time unit, a resource, and the like for feeding back HARQ-ACK feedback of the multicast PDSCH according to an indication of the unicast DCI.

sending a first signaling to the terminal equipment; wherein the first signaling is used for indicating that the unicast DCI is used for performing explicit triggering indication or implicit triggering indication on HARQ-ACK feedback of the target multicast PDSCH or PDCSH in the target PDSCH group.

It can be understood that the terminal device is specifically indicated by the first signaling, so that it can accurately determine that the unicast DCI is used for explicitly or implicitly indicating HARQ-ACK feedback of PDCSH in the target multicast PDSCH or the target PDSCH group containing the multicast PDSCH.

Optionally, the first signaling may be a higher layer signaling.

Optionally, in the HARQ-ACK feedback method according to this embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group includes a new feedback indication NFI field.

It can be understood that, in an aspect, the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group includes a new feedback indication NFI field, which may be specified by a protocol.

sending a second signaling to the terminal equipment; the second signaling is used for indicating whether the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group contains a new feedback indication NFI domain.

Optionally, the second signaling may be a higher layer signaling.

sending a third signaling to the terminal equipment; wherein the third signaling is used for indicating whether a New Feedback Indication (NFI) field is contained in the unicast DCI.

It can be understood that whether only new feedback is transmitted or feedback before retransmission is also needed may be indicated by a flipping manner (for example, NFI is represented by 1 bit, and is turned from 0 to 1, or is turned from 1 to 0, and both are considered to be flipped, and if the value is not changed, it is considered to be not flipped). If the NFI is turned, indicating that all feedback of DCI turned by the NFI for the target PDSCH group or the target multicast PDSCH is discarded before, and only transmitting the unicast DCI and HARQ-ACK feedback of PDSCH scheduled for the target PDSCH group or the target multicast PDSCH afterwards; if the NFI is not turned, all HARQ-ACK feedbacks for the target PDSCH group or the target multicast PDSCH need to be transmitted since the last NFI turning, that is, the HARQ-ACK feedbacks with the same NFI value are all effective.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, the unicast DCI includes a first downlink assignment index DAI, where the first DAI is used for the target multicast PDSCH or the target PDSCH group.

It is to be appreciated that the unicast DCI may be configured to include a DAI for the target PDSCH group or the target multicast PDSCH.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, under a condition that the multicast PDSCH corresponds to a HARQ-ACK feedback priority, the unicast DCI satisfies one of the following:

In one example, when the HARQ-ACK feedback priority corresponding to the multicast PDSCH and the HARQ-ACK feedback priority corresponding to the unicast PDSCH both have only one or no different priority, the HARQ-ACK feedback of the multicast PDSCH may be triggered according to the above embodiments. If the unicast PDSCH corresponds to multiple HARQ-ACK priorities, the triggering of the HARQ-ACK feedback of the multicast PDSCH can be unicast DCI indicating a specific priority (such as high priority or low priority) or having the same HARQ-ACK feedback priority as the multicast PDSCH, and the UE is triggered to feed back the HARQ-ACK feedback of the multicast PDSCH; that is, the unicast DCI indicating non-specific or having a different HARQ-ACK feedback priority from the multicast PDSCH does not trigger the UE to feed back HARQ-ACK feedback for the multicast PDSCH, or the UE may ignore the trigger indication of HARQ-ACK feedback for the multicast PDSCH in the unicast DCI at this time.

In one example, the triggering of the HARQ-ACK feedback for the multicast PDSCH may be triggered without prioritization when there is only one HARQ-ACK feedback priority for the multicast PDSCH and one HARQ-ACK feedback priority for the unicast PDSCH. If the unicast PDSCH corresponds to multiple HARQ-ACK priorities, the triggering of the HARQ-ACK feedback of the multicast PDSCH indicates unicast DCI with any HARQ-ACK feedback priority, and the UE can be triggered to feed back the HARQ-ACK feedback of the multicast PDSCH, namely the unicast DCI with any priority can trigger the HARQ-ACK feedback of the multicast PDSCH.

The multicast PDSCH in (1) and (2) includes the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

Optionally, in the HARQ-ACK feedback method according to the embodiment of the present application, in a case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is used to indicate one of the following:

(1) HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority; wherein the first HARQ-ACK feedback priority is one of the plurality of HARQ-ACK feedback priorities indicated by the unicast DCI.

In one example, when there are multiple different HARQ-ACK feedback priorities corresponding to the multicast PDSCH and only one HARQ-ACK feedback priority corresponding to the unicast PDSCH, the HARQ-ACK feedback for the multicast PDSCH triggered by the unicast DCI may indicate which priority HARQ-ACK feedback is triggered (i.e., the first HARQ-ACK feedback priority).

In another example, when the multicast PDSCH and the unicast PDSCH both correspond to multiple different HARQ-ACK feedback priorities, the unicast DCI may indicate which priority HARQ-ACK feedback (i.e., the first HARQ-ACK feedback priority) is triggered for the HARQ-ACK feedback of the multicast PDSCH. Or unicast DCI indicating another HARQ-ACK feedback priority different from the first HARQ-ACK feedback priority is used for triggering HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority, for example, unicast DCI indicating high priority is used for triggering HARQ-ACK of the multicast PDSCH corresponding to high priority, and unicast DCI indicating low priority is used for triggering HARQ-ACK of the multicast PDSCH corresponding to low priority.

In one example, when there are multiple different HARQ-ACK feedback priorities corresponding to the multicast PDSCH and there is only one HARQ-ACK feedback priority corresponding to the unicast PDSCH, the unicast DCI may directly trigger HARQ-ACK feedback for the multicast PDSCH of all priorities without indicating which priority HARQ-ACK feedback is triggered.

In one example, when the multicast PDSCH and the unicast PDSCH both correspond to different HARQ-ACK feedback priorities and HARQ-ACK feedback of the multicast PDSCH triggered by the unicast DCI, unicast DCI with a third HARQ-ACK feedback priority may be instructed to trigger HARQ-ACK feedback of the multicast PDSCH with the second HARQ-ACK feedback priority only; optionally, if the second HARQ-ACK feedback priority is the same as the third HARQ-ACK feedback priority, it indicates that the unicast DCI can only trigger HARQ-ACK feedback of the multicast PDSCH with the same HARQ-ACK feedback priority; otherwise, when the third HARQ-ACK feedback priority is different from the second HARQ-ACK feedback priority, the unicast DCI may not trigger the UE to feed back the HARQ-ACK feedback of the multicast PDSCH, or the UE ignores the trigger indication of the HARQ-ACK feedback of the multicast PDSCH at this time.

The multicast PDSCH in (1) to (3) includes the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

Referring to fig. 6, an embodiment of the present application provides a terminal device 300, where the terminal device 300 includes:

a feedback module 301, configured to perform HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group according to an indication of the unicast downlink control information DCI; wherein the PDSCHs in the target PDSCH group include multicast PDSCHs.

Optionally, the terminal device 300 according to the embodiment of the present application may further include:

a grouping module, configured to group PDSCH to obtain one or more PDSCH groups before performing HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or PDSCH in a target PDSCH group according to the indication of the unicast downlink control information DCI, where the one or more PDSCH groups include at least one first PDSCH group, and the PDSCH in the first PDSCH group includes a multicast PDSCH; wherein the target multicast PDSCH is included in the at least one first PDSCH group, or the target PDSCH group includes the at least one first PDSCH group.

Optionally, in the terminal device 300 according to the embodiment of the present application, the grouping module may be configured to perform one of the following operations:

grouping the PDSCHs according to the radio network temporary identifier RNTI corresponding to the PDSCH to obtain one or more PDSCH groups; grouping PDSCHs according to radio network temporary identifiers RNTIs corresponding to the DCI to obtain one or more PDSCH groups; wherein the DCI is used to schedule the PDSCH.

Optionally, in the terminal device 300 in this embodiment of the present application, the unicast DCI includes a HARQ-ACK trigger indication field; the feedback module 301 may be specifically configured to:

Optionally, in the terminal device 300 of the embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group does not include a HARQ-ACK trigger indication field.

Optionally, in the terminal device 300 in this embodiment of the present application, the unicast DCI does not include an HARQ-ACK trigger indication field; wherein the unicast DCI is used for implicitly triggering and indicating HARQ-ACK feedback of the target multicast PDSCH or PDSCHs in the target PDSCH group.

a receiving module, configured to receive a first signaling from a network device before performing HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group according to the indication of the unicast downlink control information DCI; wherein the first signaling is used for indicating that the unicast DCI is used for performing explicit triggering indication or implicit triggering indication on HARQ-ACK feedback of the target multicast PDSCH or PDSCHs in the target PDSCH group.

Optionally, in the terminal device 300 in this embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group includes a new feedback indication NFI field.

Optionally, in the terminal device 300 according to the embodiment of the present application, the receiving module may be further configured to:

receiving a second signaling from the network equipment before performing HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group according to the indication of the DCI; the second signaling is used for indicating whether the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group contains a new feedback indication NFI domain.

receiving a third signaling from the network equipment before performing HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the PDSCH in the target PDSCH group according to the indication of the DCI; wherein the third signaling is used for indicating whether a New Feedback Indication (NFI) field is contained in the unicast DCI.

Optionally, in the terminal device 300 of the embodiment of the present application, in a case that the unicast DCI includes a new feedback indication NFI field, the NFI field in the unicast DCI is used to indicate the target multicast PDSCH or the NFI corresponding to the target PDSCH group.

Optionally, in the terminal device 300 in this embodiment of the application, the unicast DCI includes a first downlink assignment index DAI, where the first DAI is used for the target multicast PDSCH or the target PDSCH group.

Optionally, in the terminal device 300 according to the embodiment of the present application, in a case that the multicast PDSCH corresponds to a HARQ-ACK feedback priority, the unicast DCI satisfies one of the following:

the HARQ-ACK feedback priority corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH; the HARQ-ACK feedback priority of the PDSCH corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH; the unicast DCI corresponds to any HARQ-ACK feedback priority; and the PDSCH corresponding to the unicast DCI corresponds to any HARQ-ACK feedback priority.

Optionally, in the terminal device 300 in this embodiment of the present application, in a case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is used to indicate one of the following:

HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority; wherein the first HARQ-ACK feedback priority is a priority indicated by the unicast DCI in the plurality of HARQ-ACK feedback priorities; HARQ-ACK feedback of the multicast PDSCH corresponding to any HARQ-ACK feedback priority in the plurality of HARQ-ACK feedback priorities; HARQ-ACK feedback of the multicast PDSCH corresponding to the second HARQ-ACK feedback priority; wherein the PDSCH corresponding to the unicast DCI or the unicast DCI corresponds to a third HARQ-ACK feedback priority.

It can be understood that, the terminal device 300 provided in the embodiment of the present application can implement the aforementioned HARQ-ACK feedback method executed by the terminal device 300, and the relevant explanations about the HARQ-ACK feedback method are all applicable to the terminal device 300, and are not described herein again.

Referring to fig. 7, an embodiment of the present application provides a network device 400, where the network device 400 includes:

a sending module 401, configured to send unicast downlink control information DCI to a terminal device, where the unicast DCI is used to instruct the terminal device to perform HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group; wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

Optionally, in the network device 400 in this embodiment of the application, the target multicast PDSCH is included in at least one first PDSCH group, or the target PDSCH group includes at least one first PDSCH group, where a PDSCH in the first PDSCH group includes a multicast PDSCH; wherein the at least one first PDSCH group is included in one or more PDSCH groups derived based on grouping PDSCHs.

Optionally, in the network device 400 in the embodiment of the present application, the one or more PDSCH groups are obtained by grouping PDSCHs based on one of the following:

Optionally, in the network device 400 in this embodiment of the present application, the unicast DCI includes a HARQ-ACK trigger indication field; wherein, the HARQ-ACK trigger indication domain is used for carrying out explicit trigger indication on the HARQ-ACK feedback of the PDCSH in the target PDSCH group by the target multicast PDCSH.

Optionally, in the network device 400 in the embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group does not include a HARQ-ACK trigger indication field.

Optionally, in the network device 400 in this embodiment of the present application, the unicast DCI does not include a HARQ-ACK trigger indication field; wherein the unicast DCI is used for implicitly triggering and indicating the HARQ-ACK feedback of the target multicast PDCSH or the PDCSH in the target PDSCH group.

Optionally, in the network device 400 according to the embodiment of the present application, the sending module 401 may be further configured to:

sending a first signaling to the terminal equipment; wherein the first signaling is used for indicating that the unicast DCI is used for performing explicit triggering indication or implicit triggering indication on HARQ-ACK feedback of PDCSH in the target multicast PDSCH or the target PDSCH group.

Optionally, in the network device 400 in the embodiment of the present application, the target multicast PDSCH or the multicast DCI corresponding to the multicast PDSCH in the target PDSCH group includes a new feedback indication NFI field.

Optionally, in the network device 400 in this embodiment of the application, when the unicast DCI includes a new feedback indication NFI field, the NFI field in the unicast DCI is used to indicate the target multicast PDSCH or the NFI corresponding to the target PDSCH group.

Optionally, in the network device 400 in this embodiment of the application, the unicast DCI includes a first downlink assignment index DAI, where the first DAI is used for the target multicast PDSCH or the target PDSCH group.

Optionally, in the network device 400 according to the embodiment of the present application, in a case that the multicast PDSCH corresponds to a HARQ-ACK feedback priority, the unicast DCI satisfies one of the following:

the HARQ-ACK feedback priority corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH; the HARQ-ACK feedback priority of the PDSCH corresponding to the unicast DCI is the same as that of the multicast PDSCH; the unicast DCI corresponds to any HARQ-ACK feedback priority; and the PDSCH corresponding to the unicast DCI corresponds to any HARQ-ACK feedback priority.

Optionally, in the network device 400 according to the embodiment of the present application, in a case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is used to indicate one of the following:

It can be understood that the network device 400 provided in the embodiment of the present application can implement the aforementioned HARQ-ACK feedback method executed by the network device 400, and the related explanations about the HARQ-ACK feedback method are all applicable to the network device 400, and are not described herein again.

In the embodiment of the application, the unicast downlink control information DCI may be sent to the terminal device, so that the terminal device may perform HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the PDSCH in the target PDSCH group including the multicast PDSCH according to the indication of the unicast DCI, so as to support HARQ-ACK feedback on the multicast PDSCH. Therefore, the multicast PDSCH of different multicast terminal equipment can carry out HARQ-ACK feedback on different time and resources so as to use different transmitting power, improve the effectiveness of a communication system and simultaneously reduce the feedback load of the multicast HARQ-ACK of a certain time unit.

Fig. 8 is a block diagram of a terminal device according to another embodiment of the present application. The terminal device 500 shown in fig. 8 includes: at least one processor 501, memory 502, at least one network interface 504, and a user interface 503. The various components in the terminal device 500 are coupled together by a bus system 505. It is understood that the bus system 505 is used to enable connection communications between these components. The bus system 505 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 505 in FIG. 8.

The user interface 503 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that the memory 502 in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 502 of the systems and methods described in embodiments herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 502 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof as follows: an operating system 5021 and application programs 5022.

The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 5022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program for implementing the method according to the embodiment of the present application may be included in the application 5022.

In this embodiment, the terminal device 500 further includes: a program or instructions stored on the memory 502 and executable on the processor 501, which when executed by the processor 501, performs the steps of:

according to the indication of the DCI, carrying out HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the target PDSCH group; wherein the PDSCHs in the target PDSCH group include multicast PDSCHs.

In the embodiment of the present application, HARQ-ACK feedback may be performed on a target multicast PDSCH or a PDSCH in a target PDSCH group including a multicast PDSCH according to an indication of unicast downlink control information DCI issued by a network device, so as to support HARQ-ACK feedback on the multicast PDSCH. Therefore, the multicast PDSCH of different multicast terminal equipment can carry out HARQ-ACK feedback on different time and resources so as to use different transmitting power, improve the effectiveness of a communication system and simultaneously reduce the feedback load of the multicast HARQ-ACK in a certain time unit.

The method disclosed in the embodiments of the present application may be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in software form in the processor 501. The Processor 501 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 501, performs the steps of the above-described embodiments of the hybrid automatic repeat request acknowledgement, HARQ-ACK, feedback method.

It is to be understood that the embodiments described in connection with the embodiments disclosed herein may be implemented by hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described in this application may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this application. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The terminal device 500 can implement the processes implemented by the terminal device in the foregoing embodiments, and in order to avoid repetition, the description is omitted here.

Preferably, an embodiment of the present application further provides a terminal device, including a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where the program or the instruction is executed by the processor to implement each process of the HARQ-ACK feedback method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing hybrid automatic repeat request-acknowledgement HARQ-ACK feedback method embodiment applied to a terminal device, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here.

The processor is the processor in the terminal device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

Referring to fig. 9, fig. 9 is a structural diagram of a network device applied in the embodiment of the present application, which can implement details of the aforementioned HARQ-ACK feedback method and achieve the same effects. As shown in fig. 9, the network device 600 includes: a processor 601, a transceiver 602, a memory 603, a user interface 604, and a bus interface 605, wherein:

in this embodiment, the network device 600 further includes: a program or instructions stored in the memory 603 and executable on the processor 601, the program or instructions when executed by the processor 601 implementing the steps of:

sending unicast Downlink Control Information (DCI) to terminal equipment, wherein the unicast DCI is used for indicating the terminal equipment to perform HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group; wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs.

In the embodiment of the present application, a unicast downlink control information DCI may be sent to a terminal device, so that the terminal device may perform HARQ-ACK feedback on a PDSCH in a target multicast physical downlink shared channel PDSCH or a target PDSCH group including a multicast PDSCH according to an indication of the unicast DCI, so as to support HARQ-ACK feedback on the multicast PDSCH. Therefore, the multicast PDSCH of different multicast terminal equipment can carry out HARQ-ACK feedback on different time and resources so as to use different transmitting power, improve the effectiveness of a communication system and simultaneously reduce the feedback load of the multicast HARQ-ACK in a certain time unit.

In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. 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. Bus interface 605 provides an interface. The transceiver 602 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 604 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.

Preferably, an embodiment of the present application further provides a network device, which includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where the program or the instruction is executed by the processor to implement each process of the HARQ-ACK feedback method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing HARQ-ACK feedback method embodiment applied to a network device, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here.

Wherein, the processor is the processor in the network device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application or portions thereof that contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims

1. A HARQ-ACK feedback method for hybrid automatic repeat request response is applied to terminal equipment, and is characterized by comprising the following steps:

according to the indication of the DCI, carrying out HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the target PDSCH group;

wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs;

before performing HARQ-ACK feedback on the PDSCH in the target multicast physical downlink shared channel or the PDSCH in the target PDSCH group according to the indication of the DCI, the method further includes:

grouping PDSCHs to obtain one or more PDSCH groups, wherein the one or more PDSCH groups comprise at least one first PDSCH group, and PDSCHs in the first PDSCH group comprise multicast PDSCHs;

wherein the target multicast PDSCH is included in the at least one first PDSCH group, or the target PDSCH group includes the at least one first PDSCH group.

2. The method of claim 1, wherein the grouping the PDSCH to obtain one or more PDSCH groups comprises one of:

grouping the PDSCHs according to the radio network temporary identifier RNTI corresponding to the PDSCH to obtain one or more PDSCH groups;

grouping PDSCHs according to Radio Network Temporary Identifiers (RNTIs) corresponding to the DCI to obtain one or more PDSCH groups; wherein the DCI is used to schedule the PDSCH.

3. The method of claim 1, wherein a HARQ-ACK trigger indication field is included in the unicast DCI;

wherein, the performing HARQ-ACK feedback to the PDSCH in the target multicast physical downlink shared channel PDSCH or the target PDSCH group according to the indication of the DCI comprises:

4. The method of claim 3, wherein the target multicast PDSCH or multicast DCI corresponding to a multicast PDSCH in the target PDSCH group does not include a HARQ-ACK trigger indication field.

5. The method of claim 1, wherein the unicast DCI does not include a HARQ-ACK trigger indication field; wherein the unicast DCI is used for implicitly triggering and indicating HARQ-ACK feedback of the target multicast PDSCH or PDSCHs in the target PDSCH group.

6. The method according to claim 1, wherein before performing HARQ-ACK feedback on PDSCH in a target multicast physical downlink shared channel or a target PDSCH group according to the indication of the unicast downlink control information DCI, the method further comprises:

7. The method of claim 1, wherein a New Feedback Indication (NFI) field is included in the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

8. The method according to claim 1, wherein before performing HARQ-ACK feedback on PDSCH in a target multicast physical downlink shared channel or a target PDSCH group according to the indication of the unicast downlink control information DCI, the method further comprises:

receiving second signaling from the network equipment; the second signaling is used for indicating whether the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group contains a new feedback indication NFI domain.

9. The method according to claim 1, wherein before performing HARQ-ACK feedback on a PDSCH in a target multicast physical downlink shared channel or a target PDSCH group according to the indication of the unicast downlink control information DCI, the method further comprises:

receiving third signaling from the network equipment; wherein the third signaling is used for indicating whether a New Feedback Indication (NFI) field is contained in the unicast DCI.

10. The method of claim 9, wherein an NFI field in the unicast DCI is used to indicate an NFI corresponding to the target multicast PDSCH or the target PDSCH group if a new feedback indication NFI field is included in the unicast DCI.

11. The method of claim 1, wherein a first Downlink Assignment Index (DAI) is included in the unicast DCI, and wherein the first DAI is used for the target multicast PDSCH or the target PDSCH group.

12. The method of claim 1, wherein in case of multicast PDSCH corresponding to a HARQ-ACK feedback priority, the unicast DCI satisfies one of:

the HARQ-ACK feedback priority corresponding to the unicast DCI is the same as the HARQ-ACK feedback priority of the multicast PDSCH;

the HARQ-ACK feedback priority of the PDSCH corresponding to the unicast DCI is the same as that of the multicast PDSCH;

the unicast DCI corresponds to any HARQ-ACK feedback priority;

and the PDSCH corresponding to the unicast DCI corresponds to any HARQ-ACK feedback priority.

13. The method of claim 1, wherein in the case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is configured to indicate one of:

HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority; wherein the first HARQ-ACK feedback priority is a priority indicated by the unicast DCI in the plurality of HARQ-ACK feedback priorities;

HARQ-ACK feedback of the multicast PDSCH corresponding to any HARQ-ACK feedback priority in the plurality of HARQ-ACK feedback priorities;

HARQ-ACK feedback of the multicast PDSCH corresponding to the second HARQ-ACK feedback priority; wherein the PDSCH corresponding to the unicast DCI or the unicast DCI corresponds to a third HARQ-ACK feedback priority.

14. A HARQ-ACK feedback method of hybrid automatic repeat request response is applied to network equipment, and is characterized in that the method comprises the following steps:

sending unicast Downlink Control Information (DCI) to terminal equipment, wherein the unicast DCI is used for indicating the terminal equipment to perform HARQ-ACK feedback on a target multicast Physical Downlink Shared Channel (PDSCH) or a PDSCH in a target PDSCH group;

wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs;

wherein the target multicast PDSCH is contained in at least one first PDSCH group, or the target PDSCH group comprises at least one first PDSCH group, and PDSCHs in the first PDSCH group contain multicast PDSCHs;

wherein the at least one first PDSCH group is included in one or more PDSCH groups, the one or more PDSCH groups being derived based on grouping PDSCHs.

15. The method of claim 14, wherein the one or more PDSCH groups are obtained by grouping PDSCHs based on one of:

radio network temporary identifier RNTI corresponding to PDSCH;

radio network temporary identifier RNTI corresponding to the DCI; wherein the DCI is used to schedule the PDSCH.

16. The method of claim 14, wherein a HARQ-ACK trigger indication field is included in the unicast DCI; wherein, the HARQ-ACK trigger indication field is used for carrying out explicit trigger indication on HARQ-ACK feedback of PDCSH in the target PDSCH group by the target multicast PDCSH.

17. The method of claim 16, wherein a HARQ-ACK trigger indication field is not included in the multicast DCI corresponding to the target multicast PDSCH or the multicast PDSCH in the target PDSCH group.

18. The method of claim 14, wherein the unicast DCI does not include a HARQ-ACK trigger indication field; the unicast DCI is used for performing implicit trigger indication on HARQ-ACK feedback of the target multicast PDCSH or PDCSH in the target PDSCH group.

19. The method of claim 14, further comprising:

20. The method of claim 14, wherein a New Feedback Indication (NFI) field is included in multicast DCI corresponding to the target multicast PDSCH or a multicast PDSCH in the target PDSCH group.

21. The method of claim 14, further comprising:

22. The method of claim 14, further comprising:

23. The method of claim 22, wherein an NFI field in the unicast DCI is used to indicate an NFI corresponding to the target multicast PDSCH or the target PDSCH group if a new feedback indication NFI field is included in the unicast DCI.

24. The method of claim 14, wherein the unicast DCI comprises a first Downlink Assignment Index (DAI), and wherein the first DAI is used for the target multicast PDSCH or the target PDSCH group.

25. The method of claim 14, wherein in case of a multicast PDSCH corresponding to one HARQ-ACK feedback priority, the unicast DCI satisfies one of:

the unicast DCI corresponds to any HARQ-ACK feedback priority;

26. The method of claim 14, wherein in the case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is configured to indicate one of:

27. A terminal device, comprising:

a feedback module, configured to perform HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group according to an indication of the unicast downlink control information DCI;

wherein PDSCHs in the target PDSCH group comprise multicast PDSCHs;

the terminal device further includes: a grouping module, configured to group PDSCH to obtain one or more PDSCH groups before performing HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or PDSCH in a target PDSCH group according to the indication of the unicast downlink control information DCI, where the one or more PDSCH groups include at least one first PDSCH group, and the PDSCH in the first PDSCH group includes a multicast PDSCH;

28. The terminal device of claim 27, wherein the grouping module is configured to perform one of the following operations:

29. The terminal device of claim 27, wherein the feedback module is specifically configured to:

and under the condition that the unicast DCI contains a HARQ-ACK triggering indication domain, carrying out HARQ-ACK feedback on the target multicast PDSCH or the PDSCH in the target PDSCH group according to the HARQ-ACK triggering indication domain, wherein the HARQ-ACK triggering indication domain is used for carrying out explicit triggering indication on the HARQ-ACK feedback of the target multicast PDSCH or the PDSCH in the target PDSCH group.

30. The terminal device of claim 27, wherein the unicast DCI does not include a HARQ-ACK trigger indication field; wherein the unicast DCI is used for implicitly triggering and indicating HARQ-ACK feedback of the target multicast PDSCH or PDSCHs in the target PDSCH group.

31. The terminal device of claim 27, wherein in case of a multicast PDSCH corresponding to a HARQ-ACK feedback priority, the unicast DCI satisfies one of:

the unicast DCI corresponds to any HARQ-ACK feedback priority;

32. The terminal device of claim 27, wherein in the case that the multicast PDSCH corresponds to multiple HARQ-ACK feedback priorities, the unicast DCI is configured to indicate one of:

33. A network device, comprising:

a sending module, configured to send unicast downlink control information DCI to a terminal device, where the unicast DCI is used to instruct the terminal device to perform HARQ-ACK feedback on a target multicast physical downlink shared channel PDSCH or a PDSCH in a target PDSCH group;

wherein the PDSCHs in the target PDSCH group comprise multicast PDSCHs;

34. The network device of claim 33, wherein the one or more PDSCH groups are obtained by grouping PDSCHs based on one of:

radio network temporary identifier RNTI corresponding to PDSCH;

35. The network device of claim 33, wherein a HARQ-ACK trigger indication field is included in the unicast DCI; wherein, the HARQ-ACK trigger indication domain is used for carrying out explicit trigger indication on the HARQ-ACK feedback of the PDCSH in the target PDSCH group by the target multicast PDCSH.

36. The network device of claim 33, wherein a HARQ-ACK trigger indication field is not included in the unicast DCI; the unicast DCI is used for performing implicit trigger indication on HARQ-ACK feedback of the target multicast PDCSH or PDCSH in the target PDSCH group.

37. The network device of claim 33, wherein in the case that the multicast PDSCH corresponds to a HARQ-ACK feedback priority, the unicast DCI satisfies one of:

the unicast DCI corresponds to any HARQ-ACK feedback priority;

38. The network device of claim 33, wherein the unicast DCI is configured to indicate one of:

HARQ-ACK feedback of the multicast PDSCH corresponding to the first HARQ-ACK feedback priority; wherein the first HARQ-ACK feedback priority is one priority indicated by the unicast DCI in the plurality of HARQ-ACK feedback priorities;

39. A terminal device, comprising: memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of any one of claims 1 to 13.

40. A network device, comprising: memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of any one of claims 14 to 26.

41. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the method according to any one of claims 1 to 13, or which, when executed by a processor, implement the steps of the method according to any one of claims 14 to 26.