CN111435901B

CN111435901B - Hybrid automatic repeat request acknowledgement feedback method, terminal and network equipment

Info

Publication number: CN111435901B
Application number: CN201910133922.2A
Authority: CN
Inventors: 鲍炜; 潘学明; 沈晓冬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2023-07-21
Anticipated expiration: 2039-02-22
Also published as: CN111435901A

Abstract

The embodiment of the invention provides a hybrid automatic repeat request acknowledgement feedback method, a terminal and network equipment, wherein the method comprises the following steps: receiving first DCI for scheduling PDSCH transmission, wherein the first DCI is used for indicating that HARQ-ACK corresponding to the PDSCH is fed back in a current COT or a target COT; and feeding back the HARQ-ACK. The embodiment of the invention can improve the resource utilization rate or the data transmission performance and reduce the cost of DCI.

Description

Hybrid automatic repeat request acknowledgement feedback method, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a hybrid automatic repeat request acknowledgement (Hybrid Automatic Repeat request Acknowledgement, HARQ-ACK) feedback method, a terminal, and a network device.

Background

In a communication system, for example, a network device operating in a cellular communication system with unlicensed spectrum, when performing downlink scheduling allocation of physical downlink shared channel (Physical downlink shared channel, PDSCH) transmissions, physical uplink control channel (Physical Uplink Control channel, PUCCH) resources indicated for HARQ-ACK feedback are typically located within the current channel occupancy time (Channel Occupancy Time, COT), i.e., downlink control information (Downlink Control Information, DCI) scheduling PDSCH transmissions is transmitted within the same COT as the corresponding HARQ-ACK. In practical applications, due to limited resources in the COT or the fact that the scheduling position is located at the tail of the COT, some HARQ-ACKs may not be fed back in the same COT as PDSCH scheduling and transmission, so that the network device performs some unnecessary retransmissions (for example, a certain data terminal actually receives successfully, but does not feed back the corresponding HARQ-ACKs, so that the network device retransmits the data), or the data transmission is suspended temporarily, so that the utilization rate of transmission resources is lower, or the data transmission performance is reduced.

Disclosure of Invention

The embodiment of the invention provides a HARQ-ACK feedback method, a terminal and network equipment, which are used for solving the problems that the utilization rate of transmission resources is lower or the data transmission performance is reduced because some HARQ-ACKs can not be fed back in COT which is the same as the scheduling and transmission of PDSCH.

In a first aspect, an embodiment of the present invention provides a HARQ-ACK feedback method, applied to a terminal, including:

receiving first Downlink Control Information (DCI) for scheduling PDSCH transmission, wherein the first DCI is used for indicating that HARQ-ACK corresponding to the PDSCH is fed back in a current COT or a target COT;

and feeding back the HARQ-ACK.

In a second aspect, an embodiment of the present invention provides a HARQ-ACK feedback method, applied to a network device, including:

transmitting first DCI for scheduling PDSCH transmission, wherein the first DCI is used for indicating HARQ-ACK corresponding to the PDSCH to feed back in the current channel occupation time COT or the target COT;

and receiving the HARQ-ACK.

In a third aspect, an embodiment of the present invention provides a terminal, including:

a receiving module, configured to receive a first DCI for scheduling PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current COT or a target COT;

And the feedback module is used for feeding back the HARQ-ACK.

In a fourth aspect, an embodiment of the present invention provides a network device, including:

a sending module, configured to send a first DCI for scheduling PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current channel occupation time COT or a target COT;

and the receiving module is used for receiving the HARQ-ACK.

In a fifth aspect, an embodiment of the present invention provides a terminal, including: the system comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the program realizes the steps in the HARQ-ACK feedback method at the terminal side provided by the embodiment of the invention when being executed by the processor.

In a sixth aspect, an embodiment of the present invention provides a network device, including: the system comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the program realizes the steps in the HARQ-ACK feedback method at the network equipment side provided by the embodiment of the invention when being executed by the processor.

In a seventh aspect, an embodiment of the present invention provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, where the computer program when executed by a processor implements a step in a HARQ-ACK feedback method on a terminal side provided by an embodiment of the present invention, or where the computer program when executed by a processor implements a step in a HARQ-ACK feedback method on a network device side provided by an embodiment of the present invention.

The embodiment of the invention can improve the resource utilization rate or the data transmission performance.

Drawings

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

fig. 2 is a flowchart of a HARQ-ACK feedback method provided by an embodiment of the present invention;

fig. 3 is a flowchart of another HARQ-ACK feedback method provided by an embodiment of the present invention;

fig. 4 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 5 is a block diagram of a network device according to an embodiment of the present invention;

fig. 6 is a block diagram of another terminal according to an embodiment of the present invention;

fig. 7 is a block diagram of another network device according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means at least one of the connected objects, e.g., a and/or B, meaning that it includes a single a, a single B, and that there are three cases of a and B.

In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Embodiments of the present invention are described below with reference to the accompanying drawings. The HARQ-ACK feedback method, the terminal and the network equipment provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a 5G system, or an evolved long term evolution (Evolved Long Term Evolution, elet) system, or a long term evolution (Long Term Evolution, LTE) system, or a subsequent evolved communication system, etc.

Referring to fig. 1, fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable, and as shown in fig. 1, the network system includes a terminal 11 and a network device 12, where the terminal 11 may be a User Equipment (UE) or other terminal side devices, for example: a terminal-side Device such as a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (personal digital assistant, PDA), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (weardable Device), or a robot, it should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a 4G base station, or a 5G base station, or a later version base station, or a base station in other communication systems, or referred to as a node B, an evolved node B, or a transmission receiving Point (Transmission Reception Point, TRP), or an Access Point (AP), or other words in the field, and the network device is not limited to a specific technical word as long as the same technical effect is achieved. In addition, the network device 12 may be a Master Node (MN) or a Secondary Node (SN). It should be noted that, in the embodiment of the present invention, only a 5G base station is taken as an example, but the specific type of the network device is not limited.

Referring to fig. 2, fig. 2 is a flowchart of a HARQ-ACK feedback method according to an embodiment of the present invention, where the method is applied to a terminal, as shown in fig. 2, and includes the following steps:

step 201, receiving a first DCI for scheduling PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current COT or a target COT.

The first DCI for scheduling PDSCH transmission may mean that PDSCH transmission is scheduled in the first DCI. The current COT may be a COT in which the first DCI is located, and the PDSCH scheduled by the first DCI may be transmitted in the current COT.

The target COT may be a next COT of the current COT, or the target COT may include: and a plurality of COTs located after the current COT.

The plurality of COTs may be the next COT and the next two COTs after the current COT, and of course, more COTs may be used. For example: the current COT is an nth COT, and the plurality of COTs may include an (n+1) th COT, an (n+2) th COT, and an (n+3) th COT.

In addition, the COT in the embodiment of the present invention may refer to a COT acquired by a network device, where the next COT is the next COT acquired by the network device. In the embodiment of the present invention, the network device may send a certain specified signal at the beginning of the COT, for example: an Initial Signal (Initial Signal) by which the terminal can determine the COT. And may also carry some information through the specified signal for indicating the case of the COT, or for indicating other cases, etc. Of course, the network device may indicate the COT through other signals, which is not limited in the embodiment of the present invention. In addition, the length of the COT may be indicated by the network device to the terminal, as indicated in the above-mentioned designation signal, or the length of the COT may be preconfigured, etc., which is not limited.

And 202, feeding back the HARQ-ACK.

Step 202 may be to feed back the HARQ-ACK in the target COT if the first DCI is used to indicate that the HARQ-ACK is fed back in the target COT. In addition, when the first DCI is used to indicate that the HARQ-ACK is fed back in the current COT, step 202 feeds back the HARQ-ACK in the current COT, so that the first DCI can support feeding back the HARQ-ACK in the current COT or feeding back the HARQ-ACK across the COTs, so as to improve compatibility.

The feedback of the HARQ-ACK in the target COT may be feedback of HARQ-ACKs corresponding to all or part of PDSCH scheduled by the first DCI, for example: there may be HARQ-ACKs whose feedback is not indicated to be fed back within the target COT.

The feedback time of the HARQ-ACK in the target COT may be a time obtained by floating based on a time at which the trigger signal in the target COT is located or a time indicated by the trigger signal. I.e. the specific feedback moment of the HARQ-ACK fed back in the target COT is floated based on the starting moment of the target COT.

In the embodiment of the invention, the cross-COT feedback HARQ-ACK can be supported, so that more opportunities for feeding back the HARQ-ACK can be provided for the terminal, unnecessary retransmission is reduced, the resource utilization rate is improved, or the temporary suspension of data transmission can be avoided, and the data transmission performance is improved. In addition, when the cross-COT feedback HARQ-ACK is supported, no extra DCI is needed to be added for indication, so that the cost of DCI when the cross-COT feedback HARQ-ACK is fed back can be reduced.

As an optional implementation manner, the first DCI includes indication information, where the indication information is used to indicate that the HARQ-ACK is fed back in the current COT or the target COT.

The indication information may be indication information newly added in the first DCI for scheduling PDSCH transmission. Preferably, the indication information is 1 bit, so that the cost of the DCI can be saved.

In this embodiment, the HARQ-ACK is directly indicated to be fed back in the current COT or the target COT by the indication information, so that implementation complexity can be reduced.

Optionally, the indication information is configured to indicate that an effective range of a feedback Timing field (feedback Timing field) in the first DCI is the current COT or the target COT.

The feedback timing field may be a HARQ-ACK feedback timing field, for example: PDSCH-to-HARQ feedback timing indication (PDSCH-to-harq_ feedback timing indicator) field in DCI format (DCI format) 1_0/1_1. The feedback timing field described above may be used to indicate the offset of the feedback HARQ-ACK.

In this embodiment, the indication may be indicated by indicating that the effective range of the feedback timing field is the current COT or the target COT: the HARQ-ACK is fed back in the current COT or the target COT.

Further, in the case that the indication information indicates that the offset indicated by the feedback timing field is an offset relative to the time domain resource where the first DCI is located, the effective range of the feedback timing field is the current COT; or alternatively

The indication information indicates that the offset indicated by the feedback timing field is an offset within the target COT.

In the implementation of the present invention, the time domain resource may be a slot (slot), which is not limited, for example: the time domain resource may be a newly introduced time domain resource unit in a later communication system release.

In this embodiment, when the offset indicated by the feedback timing field is an offset with respect to the time domain resource where the first DCI is located, feedback of the HARQ-ACK in the current COT may be implemented; and when the offset indicated by the feedback timing field is the offset in the target COT, feeding back the HARQ-ACK in the target COT.

As an alternative embodiment, a feedback timing field in the first DCI is used to indicate that the HARQ-ACK is fed back within the current COT or the target COT.

In this embodiment, the feedback of the HARQ-ACK in the current COT or the target COT may be indicated by the feedback timing field, so that no additional information needs to be added in the first DCI, so as to further reduce the cost of the DCI.

One implementation: the offset set corresponding to the feedback timing field includes: an offset within the target COT and an offset within the current COT;

the feedback timing field is used to indicate the offset within the target COT or to indicate the offset within the current COT.

The offset set may be an offset set available for the feedback timing field, and the offset set may be pre-agreed, or radio resource control (Radio Resource Control, RRC) configured. For example: the RRC specifies certain offset values for offsets that are floating in the next COT when configuring the set of offsets available for the feedback timing field. Further, these whole values may be shifted to ensure that the shift values that are valid in the current COT and valid in the next COT are all within the uniform integer value range and do not overlap each other.

In this embodiment, since the offset set includes the offset in the target COT and the offset in the current COT, by changing the value of the feedback timing field, the feedback in the current COT or the target COT can be indicated, thereby reducing the cost of DCI.

Another implementation: and in the case that the feedback timing field indicates a reserved value, indicating that the HARQ-ACK is fed back in the target COT.

The reservation value may be configured by RRC or may be pre-agreed. This value may indicate that no specific feedback time is specified in the current COT, and by this reserved value, feedback in the target COT may be indicated, but the timing at which it is not explicitly indicated to float may be achieved, and the DCI overhead may be reduced.

As an optional implementation manner, the feedback time domain resource used by the target COT to feedback the HARQ-ACK includes:

and determining time domain resources according to a trigger signal and a feedback timing field, wherein the trigger signal is used for triggering the HARQ-ACK feedback, the feedback timing field is a feedback timing field in the first DCI, or the feedback timing field is a feedback timing field in the trigger signal.

Wherein the trigger signal includes at least one of:

initial signal and cell common DCI.

The initial signal may be an initial signal of the target COT. The cell common DCI may be DCI of terminal group common signaling (UE-group common signalling), or cell common DCI such as DCI scrambled by a common control radio network temporary identifier (Common Control Radio Network Temporary Identifier, CC-RNTI).

It should be noted that, the triggering signal includes an initial signal and a cell common DCI, so that the two signals may be combined to trigger HARQ-ACK feedback, for example: after the network device sends the initial signal, the network device does not receive the HARQ-ACK, so that the terminal feedback HARQ-ACK can be triggered through the cell common DCI.

Of course, the trigger signal may also be a second DCI dedicated to the terminal, for example: a second DCI dedicated to triggering HARQ-ACK, or a second DCI for both triggering HARQ-ACK and scheduling PDSCH transmission. In addition, in the embodiment of the present invention, the supporting of the second DCI is implemented in combination with the initial signal and the cell common DCI, that is, the trigger signal may include at least one of the initial signal, the cell common DCI, and the second DCI. For example: after the network device sends the initial signal or the cell public DCI, the network device does not receive the HARQ-ACK, so that the terminal can be triggered to feed back the HARQ-ACK through the second DCI.

In addition, the time domain resource determined according to the trigger signal and the feedback timing field may be a feedback time domain resource determined according to a time domain resource sequence number of the trigger signal and an offset indicated by the feedback timing field.

In this embodiment, since the feedback time domain resource is determined according to the trigger signal and the feedback timing field, the terminal and the network device may determine the same feedback time domain resource, so as to avoid unnecessary monitoring, and save power consumption of the device.

Optionally, the time domain sequence number of the feedback time domain resource is:

adding the offset indicated by the feedback timing field to the first time domain sequence number, or adding the offset indicated by the feedback timing field to the first time domain sequence number and adding a basic offset to the first time domain sequence number;

wherein, the first time domain sequence number is:

a time domain sequence number of the time domain resource where the trigger signal is located; or alternatively

And the time domain sequence number of the first available time domain resource in the target COT.

The base offset may be configured in a higher layer, or agreed by a protocol, and the value of the base offset may be 0, and other integers, for example: 1 or 2, etc.

In this embodiment, the time domain sequence number=the first time domain sequence number of the feedback time domain resource+the offset indicated by the feedback timing field may be implemented, or the time domain sequence number=the first time domain sequence number of the feedback time domain resource+the offset indicated by the feedback timing field+the base offset may be implemented.

Taking the first time domain sequence number as the time domain sequence number of the time domain resource where the trigger signal is located, and taking the trigger signal as the initial signal, where the time domain resource is a time slot as an example, the time slot number of the feedback time domain resource=the time slot number where the initial signal is located+the offset indicated by the feedback timing field in the first DCI, or the time slot number of the feedback time domain resource=the time slot number where the initial signal is located+the offset indicated by the feedback timing field in the first dci+the basic offset.

Taking the first time domain sequence number as the time domain sequence number of the time domain resource where the trigger signal is located, where the trigger signal is cell public DCI, where the time domain resource is a time slot, where the time slot number of the feedback time domain resource=the time slot number where the cell public DCI is located+the offset indicated by the feedback timing field in the first DCI, or where the time slot number of the feedback time domain resource=the time slot number where the cell public DCI is located+the offset indicated by the feedback timing field in the first dci+the basic offset.

Taking the first time domain sequence number as a time domain sequence number of a time domain resource where the trigger signal is located, and the trigger signal is a second DCI dedicated to the terminal, where the time domain resource is a time slot as an example, and a time slot number of the feedback time domain resource=a time slot number where the second DCI is located+an offset indicated by a feedback timing field in the second DCI.

The first time domain sequence number is: the time domain sequence number of the first available time domain resource in the target COT may be referred to the corresponding description of the time domain sequence number of the time domain resource where the trigger signal is located, which is not described herein.

It should be noted that, in the embodiment of the present invention, the time domain sequence number may be an absolute time domain sequence, for example: absolute slot number. For example: the time domain sequence number of the first available time domain resource in the target COT may be an absolute time domain sequence number of the first available time domain resource in the target COT.

In this embodiment, the time domain sequence number of the feedback time domain resource can be accurately calculated, and thus the feedback time domain resource can be accurately determined. In addition, since the base offset can be added when calculating the time domain sequence number of the feedback time domain resource, decoding time requirements possibly existing in the trigger signal are considered, so that the feedback time domain resource is more reasonably determined.

Optionally, in a case where the feedback timing field indicates a reserved value, an offset indicated by the feedback timing field is 0.

The reserved values may be referred to the reserved values described in the above embodiments, and are not described herein.

Optionally, in the case that the trigger signal is transmitted multiple times in the target COT, the time domain sequence number of the time domain resource where the trigger signal is located includes: and the time domain sequence number of the time domain resource where the trigger signal transmitted for the first time in the target COT is located.

The multiple transmissions may be multiple transmissions performed to avoid the terminal from missing the trigger signal when the terminal is in the discontinuous reception (Discontinuous reception, DRX) operation; alternatively, the transmission may be performed a plurality of times to improve the reliability of the trigger signal.

In this embodiment, under the condition of transmitting the trigger signal for multiple times, the feedback time domain resource is calculated according to the time domain sequence number of the time domain resource where the trigger signal is transmitted for the first time in the target COT, so that the network device and the terminal can be prevented from calculating different feedback time domain resources, and the situation that HARQ-ACK is unsuccessful is reduced or avoided.

Further, the trigger signal includes an offset of the trigger signal relative to a first available time domain resource within the target COT; or alternatively

The trigger signal includes an offset of the trigger signal relative to a first transmitted trigger signal within the target COT; or alternatively

The trigger signal comprises position index information of the trigger signal in the target COT; or alternatively

The trigger signal includes remaining length information of the target COT.

The offset refers to a time offset, for example: a time domain offset of a trigger signal relative to a first available time domain resource within the target COT.

Wherein the trigger signals include an offset of the trigger signals relative to a first available time domain resource within the target COT may be that each trigger signal includes a respective offset relative to the first available time domain resource within the target COT, for example: the first transmission trigger signal includes an offset of the first transmission trigger signal relative to a first available time domain resource within the target COT and the second transmission trigger signal includes an offset of the second transmission trigger signal relative to the first available time domain resource within the target COT. Because the trigger signal includes an offset relative to the first available time domain resource in the target COT, the terminal may determine a time domain resource sequence number of the first available time domain resource in the target COT according to the trigger signal, and determine a feedback time domain resource.

The offset of the trigger signal including the trigger signal relative to the first transmitted trigger signal within the target COT may be that each trigger signal includes a respective offset relative to the first transmitted trigger signal within the target COT, such as: the second transmission trigger signal includes an offset of the second transmission trigger signal relative to the first transmission trigger signal within the target COT. Because the trigger signal includes an offset relative to the first transmitted trigger signal, the terminal may determine a time domain resource sequence number of the first transmitted trigger signal in the target COT according to the trigger signal, and determine a feedback time domain resource.

The trigger signal including the location index information of the trigger signal within the target COT may be that each trigger signal includes respective location index information within the target COT, for example: the trigger signal for the first transmission includes a position index 1 and the trigger signal for the second transmission includes a position index 2. The location index information may be an index or sequence number indicating the transmission of the trigger signal within the target COT, and the location index information may be used to determine a time domain sequence number of a first available time domain resource within the target COT, or to determine a time domain sequence number of the trigger signal for a first transmission within the target COT. For example: the time domain position difference values of adjacent trigger signals in the same COT are preconfigured, so that the time domain sequence number of the trigger signal transmitted for the first time in the target COT can be determined according to the position index information, for example: the time domain position difference value of adjacent trigger signals in the same COT is preconfigured, and the relation between the trigger signal transmitted for the first time and the first available time domain resource is as follows: the first transmitted trigger signal is a first available time domain resource, or the first transmitted trigger signal is separated from the first available time domain resource by a time domain resource, etc.

The trigger signal may include remaining length information of the target COT, and each trigger signal may include remaining length information corresponding to each of the trigger signals within the target COT. The remaining length information is used to determine a time domain sequence number of a first available time domain resource within the target COT or to determine a time domain sequence number of a first transmitted trigger signal within the target COT. For example: the sequence number of the time domain resource where the trigger signal of the second transmission is located is n, and the remaining length information indicated by the trigger signal of the second transmission is 2, then the time domain sequence number of the last available time domain resource of the target COT can be determined to be n+2, so that the time domain sequence number of the first available time domain resource of the target COT can be determined according to the time domain sequence number of the last available time domain resource and the length of the target COT. Alternatively, the length indication of the target COT may be added to the trigger signal (e.g., initial signal or/and cell common DCI), or preconfigured, etc.

In this embodiment, it may be implemented to flexibly determine the time domain sequence number of the first available time domain resource in the target COT or determine the time domain sequence number of the first transmitted trigger signal in the target COT in a plurality of manners.

Further, the feedback time domain resources of the target COT for feeding back the HARQ-ACK may include one or more feedback time domain resources. In the case of multiple feedback time domain resources, feedback is not limited to be required on each feedback time domain resource.

It should be noted that the above-mentioned multiple feedback time domain resources may also be referred to as multiple time domain opportunities, i.e., multiple time domain opportunities for feedback HARQ-ACKs.

Preferably, if the number of times that the terminal feeds back the HARQ-ACK in the multiple feedback time domain resources reaches a first preset threshold, the HARQ-ACK is not fed back in the feedback time domain resources remaining in the multiple feedback time domain resources; or alternatively

If the terminal has fed back the HARQ-ACK in the feedback time domain resources, not feeding back the HARQ-ACK in the residual feedback time domain resources in the feedback time domain resources

Wherein, the first preset threshold may be a high-level configuration, or a pre-agreement, such as: 1 or 2, etc. The feedback HARQ-ACK may be that the terminal has successfully accessed the channel and reported the HARQ-ACK.

And the HARQ-ACK is not fed back in the residual feedback time domain resources, so that the feedback resources can be saved.

For example: the terminal is allowed to have a plurality of time domain opportunities for reporting HARQ-ACK, if the terminal has successfully accessed the wireless channel and reported the HARQ-ACK in a certain transmission opportunity, or the terminal has successfully accessed the wireless channel and reported the HARQ-ACK in the time domain opportunities for N times (N can be 1 or a value larger than 1, N can be configured by a higher layer, and when the N is larger than 1, the reliability of reporting can be mainly improved), the terminal does not need to report in the subsequent time domain opportunities.

Wherein the plurality of feedback time domain resources may include:

a plurality of time domain resources determined according to the trigger signal and a plurality of offset values, wherein the plurality of offset values are indicated by the feedback timing field; or alternatively

The time domain sequence number of the feedback time domain resource is: the first time domain sequence number is added with the offset indicated by the feedback timing field, and the basic offset comprises a plurality of values under the condition of adding the basic offset, wherein different values correspond to different feedback time domain resources; or alternatively

And under the condition that the trigger signal is transmitted for multiple times in the target COT, determining at least two time domain resources according to the trigger signal transmitted for at least two times and the feedback timing field.

The plurality of offset values may be the same value indicated by the feedback timing field, for example: each timing candidate is interpreted as a number of offset values that are actually in effect when the RRC configures the available values of the feedback timing field, such that each offset value may correspond to a time domain opportunity. For example: the plurality of offset values includes an offset value 1 and an offset value 2 such that one time domain resource may be determined based on the offset value 1 and the trigger signal and another time domain resource may be determined based on the offset value 2 and the trigger signal.

The base offset may include a plurality of values, and the values of the base offset may be preconfigured, for example: the plurality of base offset values includes a base offset value 1 and a base offset value 2 such that one time domain resource may be determined based on the base offset value 1, the feedback timing indication, and the trigger signal, and another time domain resource may be determined based on the base offset value 2, the feedback timing indication, and the trigger signal.

The trigger signal of the at least two transmissions may be part or all of the trigger signals of the at least multiple transmissions, for example: and 3 times of transmission of the trigger signal in the target COT, two time domain resources can be determined according to the trigger signal of 2 times of transmission in 3 times and the feedback timing field. Specifically, because the time domain resources where different trigger signals are located are different, different time domain resources can be determined through different trigger signals. For example: and determining a plurality of feedback time domain resources according to the time domain sequence number of the time domain resource where each trigger signal is located, the offset indicated by the feedback timing field and the basic offset.

Optionally, the trigger signal includes: in the case of the terminal-specific second DCI, one of the following cases may be followed:

the value of the feedback timing field in the second DCI is the same as the value of the feedback timing field in the first DCI, and the physical uplink control channel resource indicator (PUCCH resource indicator, PRI) in the second DCI is the same as the value of the PRI in the first DCI; or alternatively

The value of the feedback timing field in the second DCI is the same as the value of the feedback timing field in the first DCI, but the value of the PRI in the second DCI is different from the value of the PRI in the first DCI, where the target COT is used to feed back that the physical uplink control channel PUCCH resource of the HARQ-ACK is a resource indicated by the PRI in the second DCI; or alternatively

The value of the feedback timing field in the second DCI is different from the value of the feedback timing field in the first DCI, and the value of the PRI in the second DCI is different from the value of the PRI in the first DCI, where the PUCCH resource for feeding back the HARQ-ACK by the target COT is a resource indicated by the PRI in the second DCI, and the feedback time domain resource is a resource determined according to the feedback timing field in the second DCI.

In this embodiment, it may be implemented that, in the case where the feedback timing fields and PRI of the second DCI and the first DCI are the same, HARQ-ACK feedback may be directly performed according to the feedback timing fields and PRI in the first DCI; determining PUCCH resources for feeding back the HARQ-ACK according to PRI in the second DCI under the condition that PRI of the second DCI is different from PRI of the first DCI; and determining the PUCCH resource of the feedback HARQ-ACK according to the PRI in the second DCI and determining the time domain resource of the feedback HARQ-ACK according to the feedback timing field in the second DCI under the condition that the feedback timing fields and PRI of the second DCI and the first DCI are different.

Optionally, the trigger signal includes: in the case of the terminal-specific second DCI, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

The PDSCH corresponding to the HARQ-ACK may refer to that the first DCI indicates all PDSCH corresponding to the feedback HARQ-ACK in the target COT, that is, all PDSCH scheduled in the current COT and for which the feedback HARQ-ACK is performed in the target COT.

In this embodiment, since the PDSCH corresponding to the HARQ-ACK is one PDSCH packet, the PDSCH may use the same codebook to perform HARQ-ACK feedback, so as to save feedback overhead.

In an embodiment, the second DCI may indicate that only HARQ-ACK feedback is triggered, or may indicate that HARQ-ACK feedback is triggered and PDSCH transmission is scheduled.

For example: the second DCI is further used to schedule PDSCH transmissions, where downlink allocation indexes (Downlink Assignment Index, DAIs) corresponding to PDSCH scheduled by the second DCI are accumulated based on DAIs corresponding to a last PDSCH in the PDSCH packet.

Specifically, when the dynamic codebook is adopted, the DAI corresponding to the PDSCH scheduled by the second DCI may be accumulated on the basis of the DAI corresponding to the last PDSCH in the PDSCH packet.

In this embodiment, it may be achieved that the second DCI may also be used to schedule PDSCH transmissions, so that the scheduled DCI transmitted by the network device and the terminal may be reduced, so as to save transmission resources. In addition, since the DAI corresponding to the PDSCH scheduled by the second DCI is accumulated on the basis of the DAI corresponding to the last PDSCH in the PDSCH packet, it is ensured that the PDSCH packet and the PDSCH transmission scheduled newly uniformly feed back the corresponding HARQ-ACK on the indicated PUCCH resource.

Optionally, the second DCI is further used to indicate a DAI corresponding to a last PDSCH in the PDSCH packet.

Specifically, when the dynamic codebook is adopted, the DAI corresponding to the last PDSCH in the PDSCH packet (for example, the last PDSCH in all PDSCH of the HARQ-ACK feedback in the target COT and scheduled in the current COT) is indicated in the second DCI, so that the reliability of HARQ-ACK feedback can be improved, and the inconsistency of understanding the correspondence between the HARQ-ACK bits and PDSCH transmissions on both sides can be avoided.

Note that, since the second DCI triggers feedback of HARQ-ACK in the target COT, the HARQ-ACK triggered by the second DCI may be the PDSCH packet. In addition, the HARQ-ACK triggered by the second DCI may be HARQ-ACK corresponding to PDSCH in one or more COTs before the target COT.

Further, the target field in the second DCI is used to indicate a reporting range of HARQ-ACK triggered by the second DCI.

Wherein, the target field may include at least one of the following:

HARQ process number (i.e., HARQ process number) field;

redundancy version (Redundancy Version, RV) domain;

a time domain resource allocation domain;

modulation coding scheme (Modulation and Coding Scheme, MCS) field.

In this embodiment, when the second DCI does not schedule PDSCH transmission, the reporting range of HARQ-ACK may be indicated by the target field, for example: a set of COTs, a set of PDSCH packets, etc. Since the above-described target field is reused or re-interpreted, the overhead of DCI can be saved.

It should be noted that the second DCI is not necessarily limited to the PDSCH set that needs to report HARQ-ACKs in the target COT only for the first DCI indication, and may be used with other triggering HARQ-ACK feedback schemes to trigger more HARQ-ACK feedback.

Optionally, the feeding back the HARQ-ACK includes:

feeding back the HARQ-ACK in the target COT if the first DCI indicates that the HARQ-ACK is fed back in the target COT and a time difference between the target COT and the current COT does not exceed a second preset threshold;

and if the first DCI indicates that the HARQ-ACK is fed back in the target COT and the time difference between the target COT and the current COT exceeds the second preset threshold value, not feeding back the HARQ-ACK.

The time difference between the target COT and the current COT may be a time difference between a start time of the current COT and an end time of the target COT. In this embodiment, it may be achieved that when the time difference exceeds a certain threshold, the terminal may not need to feedback HARQ-ACK for PDSCH transmission scheduled by the first DCI, so as to avoid unnecessary HARQ-ACK feedback, and because, when the time of PDSCH differs from the time of HARQ-ACK feedback by too much, the meaning of the feedback HARQ-ACK is not great or significant, so that feedback may not be performed.

In the embodiment of the invention, the resource utilization rate can be improved and the cost of DCI can be reduced through the steps.

The following illustrates the HARQ-ACK feedback method provided by the embodiment of the present invention through a specific embodiment:

in order to reduce the overhead of triggering DCI when the COT acquired by the cross-network device reports the HARQ-ACK, the following scheme can be considered to be introduced, and two steps of operations are adopted:

step 1: DCI scheduling PDSCH transmissions (i.e., the first DCI described above) indicates feedback HARQ-ACK in the next COT acquired by the current COT/network device and specifies valid PUCCH Resources (PRI)

One of two methods can be considered here:

method 1: a new 1 bit is added in the DCI to indicate the valid COT range of the HARQ-ACK feedback Timing field (for example, the PDSCH-to-harq_ feedback Timing indicator field in DCI format 1_0/1_1), specifically indicating one of the following cases:

the Timing field (i.e., feedback Timing field) indicates an offset relative to the slot where the DCI is located, i.e., HARQ-ACK corresponding to the PDSCH is fed back in the current COT;

the Timing field indicates that the offset which is effective in the next COT and acquired by the network equipment, namely, the specific feedback moment floats based on the sending moment or the indicating moment of the trigger signal in the next COT;

The Timing field indicates a valid value, i.e. its value can indicate a corresponding slot.

Method 2: no new bit is added in the DCI, and the RRC configures the value set available for the Timing field, which may be one or both of the following two manners:

the RRC designates certain offset values for use as floating offsets in the next COT when configuring the available offset set for the Timing field (it is contemplated that these values may be offset in their entirety to ensure that the offset values that are valid in the current COT and that are valid in the next COT are within a uniform integer range of values and do not overlap each other);

the RRC configures a single reserved value for not specifying a specific feedback moment within the current COT (i.e. for indicating a Timing that is fed back in the next COT but does not explicitly indicate its float) (here prior art).

Step 2: triggering HARQ-ACK reporting in the next COT acquired by the network equipment, and scheduling the PUCCH resources appointed in the DCI by using the step 1

One of the following three methods, or a combination of two or more methods, is contemplated herein:

method 1: triggering and reporting the HARQ-ACK by the Initial Signal of the COT, wherein the time slot number corresponding to the feedback time = the time slot number where the Initial Signal is located + the offset indicated by the Timing field in the scheduling DCI + the possible basic offset (which can be configured by a high layer or set to 0);

Method 2: triggering reporting of HARQ-ACK by cell common DCI (DCI of bearing terminal-group common signalling in NR can be considered, similar to DCI scrambled by CC-RNTI in enhanced authorized auxiliary access (Enhanced Licensed Assisted Access, eLAA)), wherein the time slot number corresponding to the feedback time = the time slot number of the cell common DCI + the offset indicated by the Timing field in the scheduling DCI + the possible basic offset (can be configured by a higher layer or set to 0);

the method 1/2 belongs to a mode of triggering HARQ-ACK reporting by using common signaling, and only indicates in step 1 that a terminal feeding back HARQ-ACK (i.e. scheduling PDSCH transmission with such attribute) in the next COT acquired by the network equipment needs to report corresponding HARQ-ACK based on the common signaling. If the Timing field of the scheduling DCI in step 1 indicates a reserved value configured by the RRC layer, the foregoing "offset indicated by the Timing field in the scheduling DCI" does not have a corresponding actual available value, and at this time, a slot number corresponding to the feedback time=initial Signal/a slot number where the cell common DCI is located+a possible basic offset (which may be configured by a higher layer or set to 0); the basic offset is introduced mainly to take into account the possible decoding time requirements of the Initial Signal/cell common DCI.

For method 1/2, if the time difference between the start time of the current COT (the COT where the trigger signal is located, i.e. the target COT) and the end time of the last COT (the COT where the DCI for scheduling the PDSCH is located, i.e. the COT where the first DCI is located) exceeds a certain threshold, it may be agreed that the terminal does not need to feed back the HARQ-ACK for the PDSCH transmission scheduled in step 1.

For method 1/2, considering that some terminals in a cell open DRX operation, in order to avoid that the terminal fails to check the Initial Signal or the cell common DCI, the Initial Signal/cell common DCI may have repeated transmissions at multiple positions in the current COT, where the slot number where the Initial Signal/cell common DCI is located becomes no longer unique, and HARQ-ACK feedback slots cannot be accurately calculated only based on their slot numbers, where one of the following operations may be considered:

adding an offset between the first time slots included in the COT obtained by the Initial Signal/cell public DCI relative to the current network equipment in the transmission, or an offset between the first time slots of the signaling in the current COT in the transmission, or information such as an index capable of identifying the relative position of the signaling in the COT, and the like, wherein the offset is used for determining the time slot number of the Initial Signal/cell public DCI where the first time slot is transmitted (or the time slot number corresponding to the first time slot included in the current COT), and appointing the time slot number as the time slot number of the Initial Signal/cell public DCI in the formula;

When the indication of the remaining COT length (for example, there are several slots remaining in the current COT) is only contained in the Initial Signal/cell common DCI, the last slot number contained in the current COT may be deduced, which may be agreed in advance, or the COT length indication may be added to the Initial Signal/cell common DCI to determine the slot number where the Initial Signal/cell common DCI is transmitted for the first time (or the slot number corresponding to the first slot contained in the current COT), and agree on this slot number as the slot number where the Initial Signal/cell common DCI is located in the above formula.

When the above operation is adopted, the terminal is consistent with the time slot number corresponding to the determined feedback time for one or more transmissions of the possibly detected Initial Signal/cell public DCI, and the terminal considers that only one time reporting is needed in the time slot.

For method 1/2, on the basis of the above methods, the HARQ-ACK reporting opportunity may be further extended from one to multiple, that is, alternatively, the slot number corresponding to the calculated feedback time may be extended from 1 to multiple, where the terminal is allowed to have multiple time domain opportunities for HARQ-ACK reporting. If the terminal has successfully accessed the wireless channel and reported the HARQ-ACK in a certain transmission opportunity or the terminal has successfully accessed the wireless channel and reported the HARQ-ACK in the time domain opportunities for N times (N can be 1 or a value larger than 1, N can be configured by a higher layer, and when the N is larger than 1, the reliability of reporting is mainly improved), the terminal does not need to report in the subsequent time domain opportunities. In order to calculate a plurality of feedback moments, one of the following methods may be considered:

When RRC configures available value of the Timing field, each Timing candidate value is interpreted as a plurality of offset values which are actually effective, and each offset value can correspond to one time domain opportunity;

setting the base offset to a plurality of values (configured by higher layers), each value corresponding to a time domain opportunity;

when the Initial Signal/cell common DCI starts repeated transmission, the feedback time is calculated by using the time slot number where a certain number of transmissions are located, where each transmission may correspond to one time-domain opportunity.

Method 3: reporting HARQ-ACK is triggered by terminal-specific DCI, and PUCCH resources (comprising Timing and PRI simultaneously) used for indicating HARQ-ACK feedback are indicated in the triggered DCI

The Timing (i.e., feedback Timing field) and PRI corresponding to the PUCCH resource indicated in the trigger DCI may distinguish the following cases:

the Timing and PRI are completely consistent with the corresponding information indicated by the scheduling DCI; at this time, the feedback time slot number corresponding to Timing indicated by the scheduling dci=the time slot number where the trigger DCI is located+the offset indicated by the Timing field in the scheduling dci+the possible basic offset (which may be configured by a higher layer or set to 0), and when the Timing field in the scheduling DCI indicates the reserved value, the corresponding value is considered to be 0; at this time, the terminal directly reports the HARQ-ACK according to the consistent PUCCH resource indication

Timing is consistent with the scheduling DCI indication, while PRI is not required to be consistent; at this point it is considered to reset the PUCCH resource, i.e. report HARQ-ACK using PRI indicated in the trigger DCI

Neither Timing nor PRI is required to be consistent with the corresponding information indicated by the scheduling DCI; at this point, it is considered that PUCCH resources and Timing are reset, i.e., HARQ-ACK is reported using PRI and Timing indicated in the trigger DCI

Based on whether this trigger DCI schedules additional PDSCH transmissions, two cases can be distinguished:

1. for HARQ-ACK reporting just before triggering

At this time, all PDSCH indicating feedback HARQ-ACK in the current COT (the COT in which the terminal-specific DCI is located, i.e., the target COT) is grouped into the same packet in the previous COT (the COT in which the DCI invoking PDSCH transmission is located, i.e., the COT in which the first DCI is located), and the corresponding HARQ-ACK is fed back on the indicated PUCCH resource. When the dynamic codebook is adopted, the DAI corresponding to the last PDSCH requiring feedback of HARQ-ACK may be further indicated in the DCI. At this time, because some fields in the DCI are not used (for example, fields such as HARQ process number, redundancy version, etc. are not used, and fields such as time-frequency resource allocation, MCS, etc. may be set to a reserved value to indicate that no additional valid PDSCH transmission is scheduled), the corresponding bits may be considered to further indicate the reporting range, for example, the COT set, the PDSCH packet set, etc., and are not necessarily limited to the specified PDSCH set that needs to report HARQ-ACK in the current COT, and may be used with other triggering schemes.

2. Simultaneously scheduling additional efficient PDSCH transmissions

At this time, all PDSCH indicating feedback HARQ-ACK in the current COT (the COT in which the terminal-specific DCI is located, i.e., the target COT) is grouped into the same packet in the previous COT (the COT in which the DCI invoking PDSCH transmission is located, i.e., the COT in which the first DCI is located). When the dynamic codebook is adopted, the DAI corresponding to the currently scheduled effective PDSCH transmission is accumulated on the basis of the DAI corresponding to the last PDSCH in the PDSCH packet (i.e., all PDSCH scheduled in the previous COT and feeding back HARQ-ACKs in the current COT), so as to ensure that the PDSCH packet and the newly scheduled PDSCH transmission uniformly feed back the corresponding HARQ-ACKs on the indicated PUCCH resource.

In addition, method 3 may be used in combination with methods 1 or 2 to further improve the reliability and flexibility of trigger signaling.

In the embodiment of the invention, in order to reduce the cost of triggering DCI when the COT acquired by the cross-network equipment reports the HARQ-ACK, the following scheme can be considered to be introduced, and two steps of operations are adopted:

step 1: DCI scheduling PDSCH transmission indicates feedback HARQ-ACK in the next COT acquired by the current/network equipment, and designates effective PUCCH resources;

step 2: triggering the reporting of the HARQ-ACK scheduled to be fed back in the COT in the step 1 in the next COT acquired by the network equipment, and scheduling the PUCCH resources appointed in the DCI by using the step 1.

Wherein, each of the step 1 and the step 2 has some options, and can be matched and combined with each other for use.

In the embodiment of the invention, a solution is provided mainly for the scene of COT feedback HARQ-ACK acquired by cross-network equipment so as to save the cost of triggering DCI signaling. In addition, the proposed scheme can be fused with a conventional scheme based on terminal-specific DCI triggering HARQ-ACK reporting, so as to meet the requirements of other HARQ-ACK feedback scenes.

Referring to fig. 3, fig. 3 is a flowchart of another HARQ-ACK feedback method according to an embodiment of the present invention, where the method is applied to a network device, as shown in fig. 3, and includes the following steps:

step 301, a first DCI for scheduling PDSCH transmission is sent, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current channel occupation time COT or a target COT;

step 302, receiving the HARQ-ACK.

The step may be that if the first DCI is used to indicate that the HARQ-ACK is fed back in the target COT, the HARQ-ACK is received in the target COT, or if the first DCI is used to indicate that the HARQ-ACK is fed back in the current COT, the HARQ-ACK is received in the current COT.

Optionally, the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

Optionally, the first DCI includes indication information, where the indication information is used to indicate that the HARQ-ACK is fed back in the current COT or the target COT.

Optionally, the indication information is configured to indicate that the effective range of the feedback timing field in the first DCI is the current COT or the target COT.

Optionally, when the indication information indicates that the offset indicated by the feedback timing field is an offset relative to the time domain resource where the first DCI is located, the effective range of the feedback timing field is the current COT; or alternatively

Optionally, the indication information is 1 bit.

Optionally, a feedback timing field in the first DCI is used to indicate that the HARQ-ACK feeds back within the current COT or the target COT.

Optionally, the offset set corresponding to the feedback timing field includes: an offset within the target COT and an offset within the current COT;

Optionally, in a case that the feedback timing field indicates a reserved value, the feedback timing field indicates that the HARQ-ACK is fed back within the target COT.

Optionally, the feedback time domain resource for the target COT to feedback the HARQ-ACK includes:

wherein, the first time domain sequence number is:

Optionally, the trigger signal includes an offset of the trigger signal relative to a first available time domain resource within the target COT; or alternatively

The trigger signal includes remaining length information of the target COT.

Optionally, the feedback time domain resource includes a plurality of feedback time domain resources.

Optionally, if the number of times that the terminal feeds back the HARQ-ACK in the multiple feedback time domain resources reaches a first preset threshold, the HARQ-ACK is not received in the feedback time domain resources remaining in the multiple feedback time domain resources; or alternatively

And if the terminal feeds back the HARQ-ACK in the plurality of feedback time domain resources, not feeding back the HARQ-ACK in the residual feedback time domain resources in the plurality of feedback time domain resources.

Optionally, the plurality of feedback time domain resources includes:

And under the condition that the trigger signal is transmitted for multiple times in the target COT, determining at least two time domain resources according to the trigger signal transmitted at least twice and the feedback timing field.

Optionally, the trigger signal includes at least one of:

initial signal and cell common DCI.

Optionally, the trigger signal includes: a second DCI specific to a terminal.

Optionally, the value of the feedback timing field in the second DCI is the same as the value of the feedback timing field in the first DCI, and the physical uplink control channel resource indicator PRI in the second DCI is the same as the value of the PRI in the first DCI; or alternatively

Optionally, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

Optionally, the second DCI is further used to indicate a downlink allocation index DAI corresponding to a last PDSCH in the PDSCH packet.

Optionally, the target field in the second DCI is used to indicate a reporting range of HARQ-ACK triggered by the second DCI.

Optionally, the target field includes at least one of:

HARQ process number field;

redundancy version RV domain;

a time domain resource allocation domain;

modulation coding scheme, MCS, field.

Optionally, the second DCI is further used to schedule PDSCH transmission, where the DAI corresponding to the PDSCH scheduled by the second DCI is accumulated based on the DAI corresponding to the last PDSCH in the PDSCH packet.

Optionally, the receiving the HARQ-ACK includes:

Receiving the HARQ-ACK in the target COT under the condition that the first DCI indicates that the HARQ-ACK is fed back in the target COT and the time difference between the target COT and the current COT does not exceed a second preset threshold value;

and if the first DCI indicates that the HARQ-ACK is fed back in the target COT and the time difference between the target COT and the current COT exceeds the second preset threshold, not receiving the HARQ-ACK.

It should be noted that, as an implementation manner of the network device corresponding to the embodiment shown in fig. 2, a specific implementation manner of the embodiment may refer to a related 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 be achieved.

Referring to fig. 4, fig. 4 is a block diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 4, a terminal 400 includes:

a receiving module 401, configured to receive a first DCI for scheduling PDSCH transmission, where the first DCI is used to indicate that HARQ-ACK corresponding to the PDSCH is fed back in a current COT or a target COT;

a feedback module 402, configured to feedback the HARQ-ACK.

Optionally, the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

Optionally, the indication information is 1 bit.

wherein, the first time domain sequence number is:

The trigger signal includes remaining length information of the target COT.

Optionally, if the number of times that the terminal feeds back the HARQ-ACK in the multiple feedback time domain resources reaches a first preset threshold, not feeding back the HARQ-ACK in the feedback time domain resources remaining in the multiple feedback time domain resources; or alternatively

Optionally, the plurality of feedback time domain resources includes:

Optionally, the trigger signal includes at least one of:

initial signal and cell common DCI.

Optionally, the trigger signal includes: and the second DCI is special for the terminal.

Optionally, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

Optionally, the target field includes at least one of:

HARQ process number field;

RV domain;

a time domain resource allocation domain;

MCS field.

Optionally, the feedback module 402 is configured to feedback the HARQ-ACK in the target COT if the first DCI indicates that the HARQ-ACK is fed back in the target COT and a time difference between the target COT and the current COT does not exceed a second preset threshold;

The terminal provided by the embodiment of the invention can realize each process realized by the terminal in the embodiment of the method of fig. 2, so that repetition is avoided, and the resource utilization rate or the data transmission performance can be improved.

Referring to fig. 5, fig. 5 is a block diagram of a network device according to an embodiment of the present invention, and as shown in fig. 5, a network device 500 includes:

a sending module 501, configured to send a first DCI for scheduling PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current channel occupation time COT or a target COT;

a receiving module 502, configured to receive the HARQ-ACK.

Optionally, the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

Optionally, the indication information is 1 bit.

wherein, the first time domain sequence number is:

The trigger signal includes remaining length information of the target COT.

Optionally, the plurality of feedback time domain resources includes:

Optionally, the trigger signal includes at least one of:

initial signal and cell common DCI.

Optionally, the trigger signal includes: a second DCI specific to a terminal.

Optionally, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

Optionally, the target field includes at least one of:

HARQ process number field;

RV domain;

a time domain resource allocation domain;

MCS field.

Optionally, the receiving module 502 is configured to receive the HARQ-ACK in the target COT if the first DCI indicates that the HARQ-ACK is fed back in the target COT and a time difference between the target COT and the current COT does not exceed a second preset threshold;

The network device provided by the embodiment of the present invention can implement each process implemented by the network device in the method embodiment of fig. 3, so that repetition is avoided, and in addition, the resource utilization rate or the data transmission performance can be improved.

Figure 6 is a schematic diagram of a hardware architecture of a terminal implementing various embodiments of the present invention,

the terminal 600 includes, but is not limited to: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, processor 610, and power supply 611. It will be appreciated by those skilled in the art that the terminal structure shown in fig. 6 is not limiting of the terminal and that the terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. In the embodiment of the invention, the terminal comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a robot, a wearable device, a pedometer and the like.

A radio frequency unit 601, configured to receive first downlink control information DCI for scheduling a physical downlink shared channel PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current channel occupation time COT or a target COT;

The radio frequency unit 601 is further configured to feed back the HARQ-ACK.

Optionally, the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

Optionally, the indication information is 1 bit.

wherein, the first time domain sequence number is:

The trigger signal includes remaining length information of the target COT.

Optionally, the plurality of feedback time domain resources includes:

Optionally, the trigger signal includes at least one of:

initial signal and cell common DCI.

Optionally, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

Optionally, the target field includes at least one of:

HARQ process number field;

RV domain;

a time domain resource allocation domain;

MCS field.

Optionally, the feeding back the HARQ-ACK includes:

The terminal can improve the resource utilization rate or the data transmission performance.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used to receive and send information or signals during a call, specifically, receive downlink data from a base station, and then process the downlink data with the processor 610; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 601 may also communicate with networks and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 602, such as helping the user to send and receive e-mail, browse web pages, access streaming media, etc.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the terminal 600. The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used for receiving audio or video signals. The input unit 604 may include a graphics processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, the graphics processor 6041 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphics processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. Microphone 6042 may receive sound and can process such sound into audio data. The processed audio data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 601 in the case of a telephone call mode.

The terminal 600 also includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 6061 and/or the backlight when the terminal 600 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when the accelerometer sensor is stationary, and can be used for recognizing the terminal gesture (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 605 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein.

The display unit 606 is used to display information input by a user or information provided to the user. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 607 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on touch panel 6071 or thereabout using any suitable object or accessory such as a finger, stylus, or the like). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 610, and receives and executes commands sent from the processor 610. In addition, the touch panel 6071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein.

Further, the touch panel 6071 may be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation thereon or thereabout, the touch operation is transmitted to the processor 610 to determine a type of a touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although in fig. 6, the touch panel 6071 and the display panel 6061 are two independent components to implement the input and output functions of the terminal, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 608 is an interface to which an external device is connected to the terminal 600. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 600 or may be used to transmit data between the terminal 600 and an external device.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a storage program area that may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by running or executing software programs and/or modules stored in the memory 609 and calling data stored in the memory 609, thereby performing overall monitoring of the terminal. The processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The terminal 600 may further include a power supply 611 (e.g., a battery) for supplying power to the respective components, and preferably, the power supply 611 may be logically connected to the processor 610 through a power management system, so that functions of managing charging, discharging, and power consumption management are performed through the power management system.

In addition, the terminal 600 includes some functional modules, which are not shown, and will not be described herein.

Preferably, the embodiment of the present invention further provides a terminal, which includes a processor 610, a memory 609, and a computer program stored in the memory 609 and capable of running on the processor 610, where the computer program when executed by the processor 610 implements each process of the above embodiment of the HARQ-ACK feedback method, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein.

Referring to fig. 7, fig. 7 is a block diagram of another network device according to an embodiment of the present invention, and as shown in fig. 7, the network device 700 includes: a processor 701, a transceiver 702, a memory 703 and a bus interface, wherein:

a transceiver 702, configured to send a first DCI for scheduling PDSCH transmission, where the first DCI is used to instruct HARQ-ACK corresponding to the PDSCH to be fed back in a current channel occupation time COT or a target COT;

Transceiver 702 is also configured to receive the HARQ-ACK.

Optionally, the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

Optionally, the indication information is 1 bit.

wherein, the first time domain sequence number is:

The trigger signal includes remaining length information of the target COT.

Optionally, the plurality of feedback time domain resources includes:

Optionally, the trigger signal includes at least one of:

initial signal and cell common DCI.

Optionally, the trigger signal includes: a second DCI specific to a terminal.

Optionally, the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

Optionally, the target field includes at least one of:

HARQ process number field;

RV domain;

a time domain resource allocation domain;

MCS field.

Optionally, the receiving the HARQ-ACK includes:

The network device can improve the resource utilization rate or the data transmission performance.

Wherein the transceiver 702 is configured to receive and transmit data under the control of the processor 701, said transceiver 702 comprising at least two antenna ports.

In fig. 7, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular, one or more processors represented by the processor 701 and various circuits of memory represented by the memory 703. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 702 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 704 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 701 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 701 in performing operations.

Preferably, the embodiment of the present invention further provides a network device, which includes a processor 701, a memory 703, and a computer program stored in the memory 703 and capable of running on the processor 701, where the computer program when executed by the processor 701 implements each process of the above embodiment of the HARQ-ACK feedback method, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein.

The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program, which when executed by a processor, implements each process of the embodiment of the HARQ-ACK feedback method at the terminal side provided by the embodiment of the invention, or implements each process of the embodiment of the HARQ-ACK feedback method at the network device side provided by the embodiment of the invention when executed by the processor, and can achieve the same technical effect, so that repetition is avoided and redundant description is omitted. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. The HARQ-ACK feedback method is applied to a terminal and is characterized by comprising the following steps:

receiving first Downlink Control Information (DCI) for scheduling Physical Downlink Shared Channel (PDSCH) transmission, wherein the first DCI is used for indicating that HARQ-ACK corresponding to the PDSCH is fed back in the current Channel Occupation Time (COT) or the target COT;

feeding back the HARQ-ACK;

wherein the feedback time domain resource for the target COT to feedback the HARQ-ACK includes:

2. The method of claim 1, wherein the target COT is a next COT to the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

3. The method of claim 1, wherein the first DCI includes indication information indicating that the HARQ-ACK is fed back within the current COT or the target COT.

4. The method of claim 3, wherein the indication information is used to indicate that an effective range of a feedback timing field in the first DCI is the current COT or the target COT.

5. The method of claim 3, wherein the indication information is 1 bit.

6. The method of claim 1, wherein a feedback timing field in the first DCI is used to indicate that the HARQ-ACK is fed back within the current COT or the target COT.

7. The method of claim 6, wherein the set of offsets corresponding to the feedback timing field comprises: an offset within the target COT and an offset within the current COT, wherein the feedback timing field is used to indicate the offset within the target COT or to indicate the offset within the current COT.

8. The method of claim 6, wherein the feedback timing field indicates that the HARQ-ACK is fed back within the target COT if the feedback timing field indicates a reserved value.

9. The method of claim 1, wherein the time domain sequence number of the feedback time domain resource is:

wherein, the first time domain sequence number is:

10. The method of claim 9, wherein in the case where the feedback timing field indicates a reserved value, the offset indicated by the feedback timing field is 0.

11. The method of claim 9, wherein the time domain sequence number of the time domain resource in which the trigger signal is located in the case that the trigger signal is transmitted multiple times in the target COT comprises the time domain sequence number of the time domain resource in which the trigger signal is transmitted for the first time in the target COT.

12. The method of claim 11, wherein the trigger signal comprises an offset of the trigger signal relative to a first available time domain resource within the target COT; or alternatively

The trigger signal includes remaining length information of the target COT.

13. The method of claim 1, wherein the feedback time domain resource comprises a plurality of feedback time domain resources.

14. The method of claim 13, wherein if the number of times the terminal feeds back the HARQ-ACK in the plurality of feedback time domain resources reaches a first preset threshold, not feeding back the HARQ-ACK in the feedback time domain resources remaining in the plurality of feedback time domain resources; or alternatively

15. The method of claim 13, wherein the plurality of feedback time domain resources comprises:

16. The method of any one of claims 1, 9 to 15, wherein the trigger signal comprises at least one of:

initial signal and cell common DCI.

17. The method of claim 1, 8, 13, 14 or 15, wherein the trigger signal comprises: and the second DCI is special for the terminal.

18. The method of claim 17, wherein a value of a feedback timing field in the second DCI is the same as a value of a feedback timing field in the first DCI, and a physical uplink control channel resource indicator PRI in the second DCI is the same as a value of a PRI in the first DCI; or alternatively

19. The method of claim 17, wherein the PDSCH corresponding to the HARQ-ACK is one PDSCH packet.

20. The method of claim 19, wherein the second DCI is further for indicating a downlink allocation index DAI corresponding to a last PDSCH in the PDSCH packet.

21. The method of claim 19, wherein a target field in the second DCI is used to indicate a reporting range of HARQ-ACKs triggered by the second DCI.

22. The method of claim 19, wherein the second DCI is further for scheduling PDSCH transmissions, wherein DAIs corresponding to PDSCH scheduled by the second DCI are accumulated based on DAIs corresponding to a last PDSCH in the PDSCH packet.

23. The method of any of claims 1 to 15, wherein the feeding back the HARQ-ACK comprises:

24. The HARQ-ACK feedback method is applied to network equipment and is characterized by comprising the following steps:

receiving the HARQ-ACK;

25. The method of claim 24, wherein the target COT is a next COT of the current COT; or alternatively

The target COT includes: and a plurality of COTs located after the current COT.

26. The method of claim 24, wherein the first DCI comprises indication information indicating that the HARQ-ACK is fed back within the current COT or the target COT.

27. The method of claim 24, wherein a feedback timing field in the first DCI is used to indicate that the HARQ-ACK is fed back within the current COT or the target COT.

28. The method of claim 27, wherein the set of offsets corresponding to the feedback timing field comprises: an offset within the target COT and an offset within the current COT;

29. The method of claim 27, wherein the feedback timing field indicates that the HARQ-ACK is fed back within the target COT if the feedback timing field indicates a reserved value.

30. The method of claim 24, wherein the time domain sequence number of the feedback time domain resource is:

wherein, the first time domain sequence number is:

31. The method of claim 30, wherein the offset indicated by the feedback timing field is 0 if the feedback timing field indicates a reserved value.

32. The method of claim 24, 30 or 31, wherein the trigger signal comprises at least one of:

initial signal and cell common DCI.

33. The method of claim 24 or 30, wherein the trigger signal comprises: a second DCI specific to a terminal.

34. A terminal, comprising:

a feedback module, configured to feedback the HARQ-ACK;

35. A network device, comprising:

a receiving module, configured to receive the HARQ-ACK;

36. A terminal, comprising: a memory, a processor and a program stored on the memory and executable on the processor, which when executed by the processor, implements the steps in the HARQ-ACK feedback method of any of claims 1 to 23.

37. A network device, comprising: a memory, a processor, and a program stored on the memory and executable on the processor, which when executed by the processor, performs the steps in the HARQ-ACK feedback method of any of claims 24 to 33.

38. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps in the HARQ-ACK feedback method according to any of claims 1 to 23, or which, when executed by a processor, implements the steps in the HARQ-ACK feedback method according to any of claims 24 to 33.