CN110932825B

CN110932825B - Hybrid automatic repeat request response feedback method and terminal

Info

Publication number: CN110932825B
Application number: CN201811102989.1A
Authority: CN
Inventors: 李娜; 鲁智; 陈晓航; 沈晓冬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2022-06-14
Anticipated expiration: 2038-09-20
Also published as: CN110932825A

Abstract

The embodiment of the invention provides a hybrid automatic repeat request response feedback method and a terminal, wherein the method comprises the following steps: determining PUCCH resources where HARQ-ACK is located according to information of a target PDCCH, wherein the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the PDCCHs are PDCCHs which correspond to one HARQ process identifier and are repeatedly transmitted in a repeated transmission mode; feeding back the HARQ-ACK on the PUCCH resources. The embodiment of the invention can improve the performance of the terminal for feeding back the HARQ-ACK.

Description

Hybrid automatic repeat request response feedback method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a Hybrid Automatic Repeat Request acknowledgement (HARQ-ACK) method and a terminal.

Background

The main scenes of a New Radio (NR) system include Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mtc) and Low-Latency high-reliability Communication (URLLC) scenes, which provide different requirements for the NR system in terms of high reliability, Low Latency, large bandwidth, wide coverage, and the like, where the URLLC service provides higher requirements in terms of reliability and Latency.

However, in the current communication system, the reliability of a Physical Downlink Control Channel (PDCCH) is low. When feeding back HARQ-ACK, the terminal determines a Physical Uplink Control Channel (PUCCH) resource where HARQ-ACK is located according to the information of the PDCCH. Therefore, the reliability of the PDCCH is low, the determination of the PUCCH resource by the terminal can be influenced, and the performance of the terminal for feeding back the HARQ-ACK is low.

Disclosure of Invention

The embodiment of the invention provides a HARQ-ACK feedback method and a terminal, aiming at solving the problem that the performance of the terminal for feeding back HARQ-ACK is low.

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

determining PUCCH resources where HARQ-ACK is located according to information of a target PDCCH, wherein the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the PDCCHs are PDCCHs which correspond to one HARQ process identifier and are repeatedly transmitted in a repeated transmission mode;

feeding back the HARQ-ACK on the PUCCH resources.

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

the determining module is used for determining PUCCH resources where the HARQ-ACK is located according to information of a target PDCCH, wherein the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the PDCCHs are PDCCHs which correspond to one HARQ process identifier and are repeatedly transmitted in a repeated transmission mode;

a feedback module, configured to feed back the HARQ-ACK on the PUCCH resource.

In a third aspect, an embodiment of the present invention provides a terminal, including: the invention also provides a device for implementing the HARQ-ACK feedback method, and the device comprises a memory, a processor and a program which is stored on the memory and can run on the processor, wherein the program realizes the steps in the HARQ-ACK feedback method provided by the embodiment of the invention when being executed by the processor.

In a fourth 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, and when the computer program is executed by a processor, the computer program implements the steps of the HARQ-ACK feedback method provided in the embodiment of the present invention.

The embodiment of the invention can improve the performance of the terminal for feeding back the HARQ-ACK.

Drawings

Fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable;

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

fig. 3 is a schematic diagram of PUCCH resource determination according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another PUCCH resource determination provided in an embodiment of the present invention;

fig. 5 is a schematic diagram of another PUCCH resource determination provided in an embodiment of the present invention;

fig. 6 is a schematic diagram of another PUCCH resource determination provided in an embodiment of the present invention;

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

fig. 8 is a structural diagram of another terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, 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, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

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

Referring to fig. 1, fig. 1 is a structural 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 side device 12, where the terminal 11 may be a User Equipment (UE) or other terminal side devices, for example: it should be noted that, in the embodiment of the present invention, a specific type of the terminal 11 is not limited, and the terminal may be a terminal-side Device such as a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device). The network side device 12 may be a 4G base station, a 5G base station, a later-version base station, a base station in other communication systems, or referred to as a node B, an evolved node B, or other words in the field, and the network side device is not limited to a specific technical word as long as the same technical effect is achieved. In addition, the network side device 12 may be a Master base station (Master Node, MN) or a Secondary base Station (SN). It should be noted that, in the embodiment of the present invention, only the 5G base station is taken as an example, but the specific type of the base station is not limited.

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

step 201, determining a PUCCH resource where the HARQ-ACK is located according to information of a target PDCCH, where the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the plurality of PDCCHs are PDCCHs that are repeatedly transmitted in a repeat transmission manner and correspond to one HARQ process identifier (HARQ process ID).

The multiple PDCCHs may be repeatedly transmitted using a PDCCH repetition (retransmission) transmission scheme, where the PDCCH repetition transmission scheme may refer to multiple PDCCH repetition transmission, and it should be noted that the content of the multiple PDCCHs in the repeat transmission scheme is not limited to be completely the same, and the multiple PDCCHs correspond to the same (HARQ process ID). For example: the PDCCH that is repeatedly transmitted may refer to that the multiple PDCCHs schedule the same PDSCH, or that one PDCCH of the multiple PDCCHs schedules one PDSCH (that is, the PDCCH and the PDSCH are in a one-to-one scheduling manner), and the multiple PDSCHs scheduled by the multiple PDCCHs correspond to the same HARQ process identifier (process ID).

The target PDCCH may be at least one of a plurality of PDCCHs, and the target PDCCH may be part or all of the plurality of PDCCHs.

It should be noted that, in the embodiment of the present invention, a determination method for determining a PUCCH resource where a HARQ-ACK is located according to information of a target PDCCH is not limited, for example: the PUCCH resource may be determined according to at least one of K1, a PUCCH Resource Indicator (PRI), a first Control Channel Element (CCE) index, or the like in information of the PDCCH. Here, K1 is a PDSCH-to-HARQ _ feedback timing indicator field in DCI receiving by PDCCH in DCI transmitted through the PDCCH. Further, the above-mentioned mode of determining the PUCCH resource may be a mode of determining the PUCCH resource where the HARQ-ACK is located according to PDCCH information when there is no PDCCH repetition.

The plurality of PDCCHs adopt a PDCCH repetition transmission mode, so that the reliability of the PDCCHs can be improved, and the PUCCH resource where the HARQ-ACK is located is determined according to the information of the target PDCCH, so that the performance of the terminal for feeding back the HARQ-ACK can be improved.

And 202, feeding back the HARQ-ACK on the PUCCH resources.

After determining the PUCCH resource in step 201, step 202 may feed back a corresponding HARQ-ACK on the PUCCH resource. Here, the HARQ-ACK may refer to HARQ-ACK feedback for the PDSCH, and may be ACK or NACK, for example: and if the PDSCH is successfully demodulated, feeding back ACK, and if the PDSCH is not successfully demodulated, feeding back NACK. Of course, in some scenarios, if the PDCCH is used to release SPS PDSCH, the PDCCH does not schedule any PDSCH transmission, but is used to indicate that the PDSCH of the previous semi-persistent scheduling (SPS) transmission is deactivated and no longer transmitted, and the HARQ-ACK fed back by the terminal is feedback to the PDCCH.

Here, the feeding back the HARQ-ACK may be feeding back the HARQ-ACK to a network side.

In addition, if step 201 determines a plurality of PUCCH resources, step 202 may be to feed back HARQ-ACK on some or all of the plurality of PUCCH resources.

In the method, under the condition of adopting a PDCCH repetition transmission mode, the PUCCH resource where the HARQ-ACK is located is determined according to the information of the target PDCCH, and the HARQ-ACK is fed back on the PUCCH resource, so that the terminal behavior of the HARQ-ACK reported by the terminal when the PDCCH repetition transmission mode is adopted is determined, and the transmission performance of the terminal is further improved, such as the performance of feeding back the HARQ-ACK by the terminal is improved. Certainly, since the target PDCCH is the last PDCCH in the time domain positions of the multiple PDCCHs or when the multiple PUCCH resources are determined, HARQ-ACK may be fed back on part of the multiple PUCCH resources, which may also save transmission unlocking.

As an optional implementation manner, the target PDCCH is a PDCCH in a last time domain position of the multiple PDCCHs; or

The target PDCCH is the plurality of PDCCHs.

The target PDCCH may be the PDCCH with the last time domain position in the multiple PDCCHs, where the ending position (for example, ending/last symbol) of the target PDCCH is at the last position in the time domain positions occupied by the multiple PDCCHs, that is, the target PDCCH is the last PDCCH in the multiple PDCCHs, and the last PDCCH is the last PDCCH in the time domain. Of course, if there is an overlap in the time domain on multiple PDCCHs and multiple PDCCHs are overlapped at the time domain end positions occupied by the multiple PDCCHs, the target PDCCH may be one or all of the overlapped multiple PDCCHs.

The target PDCCH may be the multiple PDCCHs, where step 201 determines multiple PUCCH resources where the HARQ-ACK is located according to information of the multiple PDCCHs, where information of one PDCCH may determine one PUCCH resource, that is, information of each PDCCH may determine one PUCCH resource. Of course, in the embodiment of the present invention, the same PUCCH resource may be determined according to information of multiple PDCCHs, for example: the plurality of PDCCHs include PDCCH1, PDCCH2 and PDCCH3, wherein in some scenarios, 3 different PUCCH resources may be determined according to information of PDCCH1, PDCCH2 and PDCCH3, respectively, and in other scenarios, two PUCCH resources, such as PDCCH2 and PDCCH3, may be determined according to information of PDCCH1, PDCCH2 and PDCCH3, corresponding to the same PUCCH resource.

As an optional implementation manner, the PDCCH at the last time domain position includes:

a last-symbol PDCCH among the plurality of PDCCHs.

The PDCCH having the last end symbol in the plurality of PDCCHs may be the PDCCH having the last end symbol in the plurality of PDCCHs.

If the multiple PDCCHs adopt a Time Division Multiplexing (TDM) transmission scheme, the target PDCCH is a last PDCCH of an end symbol in the multiple PDCCHs.

For example: as shown in fig. 3, one PDSCH transmission is scheduled 2 times for PDCCH retransmission transmission in option (option)1, and the terminal may determine the PUCCH resource where HARQ-ACK feeding back PDSCH is located according to the received information (K1, PRI, or the first CCE index of PDCCH, etc.) of the last PDCCH, where the specific determination method is consistent with the method when there is no PDCCH retransmission. In option2, one PDCCH schedules one PDSCH, the PDCCH and the PDSCH repeat twice at the same time, the two PDSCHs correspond to the same HARQ process ID, and similarly, the terminal may determine the PUCCH resource according to the received last PDCCH information. In the scheme, the terminal only needs to feed back the HARQ-ACK on one PUCCH resource, the realization is simple, and the uplink control channel resource is saved.

The PDCCH having the last end symbol in the plurality of PDCCHs may be the PDCCH having the last end symbol in the plurality of PDCCHs acknowledged by the terminal. Therefore, in practical applications, there may be a detection omission situation (the base station transmits a certain PDCCH but the terminal does not receive the PDCCH), the terminal may transmit a resource according to a resource indicated by the last PDCCH received by the terminal (which may not be transmitted by the base station), on the base station side, the base station may start detecting from the PUCCH resource position corresponding to the last PDCCH according to the PDCCH transmitted by the base station, if the terminal does not detect the resource, the base station may start detecting … at the PUCCH resource position corresponding to the last PDCCH, and so on, until information transmitted by the terminal is detected on the PUCCH corresponding to a certain PDCCH, and if information transmitted by the terminal is not detected on the PUCCHs corresponding to all PDCCHs, the terminal is considered to have missed all PDCCH transmissions.

In addition, if the plurality of PDCCHs employ a Frequency Division Multiplexing (FDM) transmission scheme and end symbols of the plurality of PDCCHs are different, the target PDCCH is the last PDCCH of the end symbols of the plurality of PDCCHs.

In the above embodiment, the terminal may determine the PUCCH resource according to the received information of the last pdcch (the last pdcch), so that HARQ-ACK may be fed back on one PUCCH resource, which is simple to implement and saves uplink control channel resources.

As another optional implementation manner, the multiple PDCCHs are transmitted in an FDM manner, and then the PDCCH at the last time domain position includes:

and a PDCCH determined according to a resource identifier or a frequency domain location (frequency location) in the plurality of PDCCHs.

In this embodiment, if a plurality of PDCCHs are transmitted in the FDM manner, the PDCCHs may be further determined according to the resource identifier or the frequency domain position, and then the PUCCH resource may be determined according to the information of the PDCCH, so that the number of feedback PUCCH resources is reduced, and the uplink control channel resource is saved.

It should be noted that, the aforementioned transmission of multiple PDCCHs in the FDM manner may refer to that multiple PDCCHs are completely overlapped or partially overlapped in the time domain, for example: the plurality of PDCCH end symbols may be the same or different.

The PDCCH determined according to the resource identifier or the frequency domain position in the multiple PDCCHs may include:

the PDCCH with the largest resource identification or the highest frequency domain position in the plurality of PDCCHs.

Therefore, one PUCCH resource can be determined according to the information of the PDCCH with the largest resource identification or the highest frequency domain position, and the PUCCH resource is determined according to the information of the PDCCH, so that HARQ-ACK is fed back on one PUCCH resource to save uplink control channel resources.

Preferably, the resource identifier includes:

a search space ID (search space ID) or a Control Resource Set (CORESET ID) of the PDCCH.

Therefore, the target PDCCH can be determined according to the information of the PDCCH with the largest search space ID or the largest CORESET ID.

It should be noted that, in the embodiment of the present invention, determining a PDCCH according to a resource identifier or a frequency domain position in the multiple PDCCHs is not limited, and determining a PDCCH with a largest resource identifier or a highest frequency domain position, for example: it may also be determined that the resource identity is minimal or the frequency domain location is minimal.

In the foregoing embodiment, when the target PDCCH is the PDCCH with the last time domain position in the multiple PDCCHs, and when the repeatedly transmitted PDCCHs are transmitted in the FDM manner at the same time, the terminal may determine a valid PDCCH (the target PDCCH for determining the PUCCH resource) according to a search space ID, a core set ID, or a frequency location.

For example: as shown in fig. 4, PDCCH repetition is transmitted in FDM manner (may be completely overlapped or partially overlapped in time domain). In two ways (a) and (b) in the figure, the terminal may determine the PUCCH resource according to the information of the last received PDCCH, where two PDCCH end symbols in (a) are the same, and the last PDCCH may be defined as a PDCCH with a larger search ID, core set ID, or higher frequency location. (b) The ending symbols of the two PDCCHs are different, and the last PDCCH may be defined as a PDCCH with a later ending symbol, or as a PDCCH with a larger search space ID and core set ID, or with a higher frequency location. In addition, in (c), the terminal determines a plurality of PUCCH resources for each received PDCCH, that is, the target PDCCH is the plurality of PDCCHs.

As another optional implementation manner, if the target PDCCH is the multiple PDCCHs, feeding back the HARQ-ACK on the PUCCH resource includes:

feeding back the HARQ-ACK on a specific PUCCH resource among the PUCCH resources;

and the specific PUCCH resource is determined according to the information of the specific PDCCH.

In this embodiment, when the target PDCCH is the multiple PDCCHs and step 201 determines multiple PUCCH resources according to information of the multiple PDCCHs, the HARQ-ACK may be fed back on a specific PUCCH resource among the multiple PUCCH resources. Here, the specific PUCCH may refer to a PDCCH for which the first scheduled PDSCH is successfully modulated or a PUCCH corresponding to a PDCCH for which the scheduled PDSCH is successfully modulated. Therefore, HARQ-ACK can be fed back on partial resources of a plurality of PUCCH resources, and uplink control channel resources are saved.

Optionally, the specific PDCCH may refer to a PDCCH corresponding to a PDSCH successfully/successfully mediated by the terminal for the first time, that is, the terminal successfully/successfully demodulates a PDSCH corresponding to the specific PDCCH for the first time; or

The PDSCH corresponding to the specific PDCCH is a PDSCH transmitted last time among the PDSCHs corresponding to the multiple PDCCHs, and the terminal does not successfully demodulate the PDSCHs corresponding to the multiple PDCCHs before the PDSCH corresponding to the specific PDCCH is transmitted.

It should be noted that, in the embodiment of the present invention, the PDCCH may refer to a PDCCH for scheduling a PDSCH or a PDCCH for releasing an SPS PDSCH. If the PDCCH is used for releasing the SPS PDSCH, the PDCCH does not schedule any PDSCH transmission, but is used for indicating that the PDSCH of the previous SPS transmission is deactivated and is not transmitted any more, and the HARQ-ACK fed back by the terminal is feedback to the PDCCH.

Therefore, if the PDSCH is successfully mediated by the terminal, the specific PUCCH resource is determined according to the information of the PDCCH for dispatching the PDSCH, and the HARQ-ACK is fed back on the PUCCH resource, so that the HARQ-ACK can be fed back to the network side as early as possible, the time delay can be reduced, and the subsequent unnecessary repeated transmission of the network side equipment is avoided.

In addition, before the specific PDCCH, the terminal does not successfully demodulate the PDSCHs scheduled by the multiple PDCCHs, so that when the terminal determines multiple PUCCH resources (PUCCH and PDCCH are in a many-to-many manner) according to the information of the multiple PDCCHs, the terminal feeds back ACK on the corresponding PUCCH resource only when the PDSCH is successfully demodulated, and when the terminal does not successfully demodulate the PDSCH, the terminal does not need to feed back until the last transmission, and the UE feeds back HARQ-ACK (ACK or NACK), thereby reducing the number of HARQ-ACK feedback times of the terminal.

For example: as shown in fig. 5, one PDSCH transmission is scheduled 2 times for PDCCH retransmission transmission in option1, and the terminal may determine PUCCH resources where HARQ-ACK feeding back PDSCH is located according to the received information (K1, PRI, or first CCE index of PDCCH, etc.) of each PDCCH, where the specific determination method is consistent with that when PDCCH retransmission does not exist, and the determined multiple PUCCHs are TDM in the time domain, that is, multiple PUCCHs adopt a TDM transmission mode.

In option2, one PDCCH schedules one PDSCH, the PDCCH and the PDSCH repeat twice at the same time, the two PDSCHs correspond to the same HARQ process ID, and the terminal can determine the PUCCH resource according to each received PDCCH information. If the terminal can successfully demodulate after receiving the PDSCH1, the UE feeds back ACK on the PUCCH1 determined by the PDCCH 1. If the terminal cannot successfully demodulate after receiving the PDSCH1, the terminal does not need to transmit the PUCCH1 determined by the PDCCH1, and if the terminal cannot successfully demodulate after receiving the PDSCH2 and the PDSCH2 is the last repeated transmission, a NACK is fed back on the PUCCH2 resource determined by the PDCCH 2.

The terminal determining whether the potential method is the last transmission may include:

1. number of repeated transmissions configured by RRC;

2. a sliding window through which transmissions are repeated; this may be by determining the last transmission in the sliding window;

3. determined by a New Data Indicator (NDI) and HARQ process ID; for example: the terminal considers that the terminal receives the last transmission every time when receiving a PDCCH or PDSCH, and according to the PUCCH resource determined by the PDCCH or PDSCH, if the terminal receives a new PDCCH or PDSCH with the same HARQ process ID within a certain time before the PUCCH resource, the terminal updates the PUCCH, and in order to enable the UE to update the PUCCH resource with enough time, it may be necessary to limit the time from the terminal symbol of the new PDSCH not expected by the terminal to the PUCCH starting symbol determined by the first PDCCH to be less than a certain symbol, for example, N3.

In the above scheme, if the terminal feeds back NACK/ACK on each PUCCH, HARQ-ACK needs to be fed back on multiple PUCCH resources, which is equivalent to that the PUCCH also adopts a repeated transmission mode, so that reliability of PUCCH transmission is increased, but PUCCH resources indicated by different PDCCHs are required to be non-overlapping in a time domain when the base station performs scheduling (if PUCCH resources indicated by different PDCCHs are overlapped in the time domain, the terminal cannot transmit multiple PUCCHs simultaneously, and the terminal may select to transmit one PUCCH according to a certain mode (e.g., select a PUCCH indicated by a subsequent PDCCH, or select a PUCCH with the earliest or latest start time or the shortest or longest length). If the terminal only needs to feed back NACK on the corresponding PUCCH resource after successfully demodulating the PDSCH, the terminal can feed back HARQ-ACK to the base station as soon as possible, thereby reducing time delay and avoiding subsequent unnecessary repeated transmission of the base station.

the specific PUCCH resource is a PUCCH resource with the earliest starting time or the shortest length in a plurality of PUCCH resources, the PUCCH resources are determined according to the information of the PDCCHs, and the PUCCH resources are overlapped on a time domain.

Wherein, the overlapping of the plurality of PUCCH resources in the time domain may be a partial overlapping or a complete overlapping in the time domain.

The implementation mode can realize that if a plurality of PUCCH resources are overlapped on the time domain, the PUCCH resource with the earliest starting time or the shortest length is selected to feed back the HARQ-ACK, so that the HARQ-ACK is fed back to the network side as early as possible to reduce the time delay,

of course, in the embodiment of the present invention, selection of the PUCCH resource with the earliest start time or the shortest length is not limited, for example: in some scenarios, the PUCCH resource with the latest starting time or the longest length may be selected for feedback of HARQ-ACK. And if the starting time is the same, the terminal selects the specific PUCCH according to the PUCCH symbol length.

For example: as shown in fig. 6, the terminal may determine the PUCCH resource according to each received PDCCH, and unlike the example shown in fig. 5, not only different PDCCHs may indicate different PUCCH resources, but also multiple PDCCHs may indicate the same PUCCH resource. In fig. 6, PDCCH1 corresponds to PUCCH1, and PDCCH2 and PDCCH3 both correspond to PUCCH 2.

Similar to the example shown in fig. 5, PUCCHs indicated by different PDCCHs may overlap in the time domain, and if PUCCH resources indicated by different PDCCHs overlap in the time domain, a terminal cannot transmit multiple PUCCHs simultaneously, and the terminal may select one PUCCH to transmit in some manner (e.g., select a PUCCH indicated by a subsequent PDCCH, or select a PUCCH with the earliest/latest start time).

As an optional implementation, the plurality of PDCCHs include:

PDCCH scheduling PDSCH transmission or PDCCH releasing (release) PDSCH of semi-persistent scheduling (SPS).

Therefore, when a retransmission transmission mode is adopted in a PDCCH for scheduling PDSCH transmission or a PDCCH for releasing (release) PDSCH of semi-persistent scheduling (SPS), the behavior that the terminal feeds back HARQ-ACK can be defined, and when the PDCCH for releasing the PDSCH of the semi-persistent scheduling adopts the retransmission transmission mode, the behavior that the terminal feeds back HARQ-ACK can be defined.

The HARQ-ACK feedback method provided by the embodiment of the invention can realize that:

when a retransmission transmission mode is adopted for a PDCCH (physical downlink control channel) for scheduling a PDSCH (physical downlink shared channel) or a PDCCH for releasing downlink semi-persistent scheduling, a terminal can determine PUCCH resources where HARQ-ACK (hybrid automatic repeat request-acknowledgement) of a PDSCH is fed back in the following mode:

mode 1: the terminal determines PUCCH resources according to the received information of the last PDCCH (the last PDCCH); optionally, when the repeatedly transmitted PDCCH is transmitted in an FDM (or FDMed) manner at the same time, the terminal determines a valid PDCCH (the target PDCCH for determining the PUCCH resource) according to a search space ID, a core set ID, a frequency location, and the like;

mode 2: the terminal determines a plurality of PUCCH resources according to each received PDCCH (the PUCCH and the PDCCH are in a many-to-many mode); optionally, the terminal feeds back ACK on the corresponding PUCCH resource only when the PDSCH is successfully demodulated or the PDSCH is successfully demodulated for the first time, and when the terminal does not successfully demodulate the PDSCH, the terminal does not need to feed back ACK/NACK until the last transmission.

The method defines the mode that the terminal determines the PUCCH resources when the PDCCH repetition is transmitted.

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

a determining module 701, configured to determine, according to information of a target PDCCH, a PUCCH resource where an HARQ-ACK is located, where the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the plurality of PDCCHs are PDCCHs that are repeatedly transmitted in a repeated transmission manner and correspond to one HARQ process identifier;

a feedback module 702 configured to feed back the HARQ-ACK on the PUCCH resource.

Optionally, the target PDCCH is a PDCCH at the last time domain position in the multiple PDCCHs; or

The target PDCCH is the plurality of PDCCHs.

Optionally, the PDCCH at the last time domain position includes:

a last-symbol PDCCH among the plurality of PDCCHs.

Optionally, the multiple PDCCHs are transmitted in an FDM manner, and the PDCCH at the last time domain position includes:

and the PDCCH is determined according to the resource identifier or the frequency domain position in the plurality of PDCCHs.

Optionally, the PDCCH determined according to the resource identifier or the frequency domain location in the multiple PDCCHs includes:

Optionally, the resource identifier includes:

a search space identification or a control resource set CORESET identification.

Optionally, if the target PDCCH is the multiple PDCCHs, the feedback module 702 is configured to feed back the HARQ-ACK on a specific PUCCH resource of the PUCCH resources;

the specific PUCCH resource is determined according to the information of the specific PDCCH; alternatively, the first and second electrodes may be,

Optionally, the terminal successfully demodulates the PDSCH corresponding to the specific PDCCH; alternatively, the first and second electrodes may be,

the PDSCH corresponding to the specific PDCCH is a PDSCH transmitted last time in the PDSCHs corresponding to the PDCCHs, and the PDSCH corresponding to the PDCCHs is not successfully demodulated by the terminal before the PDSCH corresponding to the specific PDCCH is transmitted.

Optionally, the plurality of PDCCHs include:

a PDCCH for scheduling PDSCH transmission or a PDCCH for releasing a semi-statically scheduled PDSCH.

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the method embodiment of fig. 2, and for avoiding repetition, details are not described here, and the resource overhead of configuration can be reduced.

Figure 8 is a schematic diagram of the hardware architecture of a terminal implementing various embodiments of the present invention,

the terminal 800 includes but is not limited to: radio frequency unit 801, network module 802, audio output unit 803, input unit 804, sensor 805, display unit 806, user input unit 807, interface unit 808, memory 809, processor 810, and power supply 811. Those skilled in the art will appreciate that the terminal configuration shown in fig. 8 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

A processor 810, configured to determine, according to information of a target PDCCH, a PUCCH resource where an HARQ-ACK is located, where the target PDCCH is at least one PDCCH in a plurality of PDCCHs, and the plurality of PDCCHs are PDCCHs that are repeatedly transmitted in a repeat transmission manner and correspond to one HARQ process identifier;

a radio frequency unit 801, configured to feed back the HARQ-ACK on the PUCCH resource.

The target PDCCH is the plurality of PDCCHs.

Optionally, the PDCCH at the last time domain position includes:

a last-symbol PDCCH among the plurality of PDCCHs.

Optionally, the multiple PDCCHs are transmitted in a frequency division multiplexing, FDM, manner, and then the PDCCH at the last time domain position includes:

Optionally, the resource identifier includes:

a search space identification or a control resource set CORESET identification.

Optionally, if the target PDCCH is the multiple PDCCHs, the feeding back the HARQ-ACK on the PUCCH resource performed by the radio frequency unit 801 includes:

the specific PUCCH resource is a PUCCH resource with the earliest starting time or the shortest length in a plurality of PUCCH resources, the PUCCH resources are determined according to the information of the PDCCHs, and the PUCCH resources are overlapped in a time domain.

Optionally, the plurality of PDCCHs include:

The terminal can improve the performance of the terminal for feeding back the HARQ-ACK.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 801 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 810; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 801 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. Further, the radio frequency unit 801 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user through the network module 802, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.

The audio output unit 803 may convert audio data received by the radio frequency unit 801 or the network module 802 or stored in the memory 809 into an audio signal and output as sound. Also, the audio output unit 803 may also provide audio output related to a specific function performed by the terminal 800 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, a receiver, and the like.

The input unit 804 is used for receiving an audio or video signal. The input Unit 804 may include a Graphics Processing Unit (GPU) 8041 and a microphone 8042, and the Graphics processor 8041 processes image data of a still picture or video obtained by an image capturing device (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 806. The image frames processed by the graphics processor 8041 may be stored in the memory 809 (or other storage medium) or transmitted via the radio frequency unit 801 or the network module 802. The microphone 8042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 801 in case of a phone call mode.

The terminal 800 also includes at least one sensor 805, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 8061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 8061 and/or the backlight when the terminal 800 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 805 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 806 is used to display information input by the user or information provided to the user. The Display unit 806 may include a Display panel 8061, and the Display panel 8061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 807 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 8071 (e.g., operations by a user on or near the touch panel 8071 using a finger, a stylus, or any other suitable object or accessory). The touch panel 8071 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction 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 sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 810, receives a command from the processor 810, and executes the command. In addition, the touch panel 8071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 8071, the user input unit 807 can include other input devices 8072. In particular, other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 8071 can be overlaid on the display panel 8061, and when the touch panel 8071 detects a touch operation on or near the touch panel 8071, the touch operation is transmitted to the processor 810 to determine the type of the touch event, and then the processor 810 provides a corresponding visual output on the display panel 8061 according to the type of the touch event. Although in fig. 8, the touch panel 8071 and the display panel 8061 are shown as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 8071 and the display panel 8061 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 808 is an interface for connecting an external device to the terminal 800. For example, the external device may include a wired or wireless headset port, an external power supply (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 808 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the terminal 800 or may be used to transmit data between the terminal 800 and external devices.

The memory 809 may be used to store software programs as well as various data. The memory 809 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 809 can include high speed random access memory, and can 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 810 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 809 and calling data stored in the memory 809, thereby integrally monitoring the terminal. Processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 810.

The terminal 800 may also include a power supply 811 (e.g., a battery) for powering the various components, and preferably, the power supply 811 may be logically coupled to the processor 810 via a power management system to provide management of charging, discharging, and power consumption via the power management system.

In addition, the terminal 800 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, which includes a processor 810, a memory 809, and a computer program stored in the memory 809 and capable of running on the processor 810, where the computer program, when executed by the processor 810, implements each process of the foregoing beam failure detection method embodiment, and can achieve the same technical effect, and details are not described here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the HARQ-ACK feedback method embodiment on the terminal side provided in the embodiment of the present invention, or when the computer program is executed by a processor, the computer program implements each process of the beam failure detection method embodiment on the base station side provided in the embodiment of the present invention, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

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 invention 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 (such as 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 invention.

While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

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

determining a Physical Uplink Control Channel (PUCCH) resource where HARQ-ACK is located according to information of a target Physical Downlink Control Channel (PDCCH), wherein the target PDCCH is the PDCCH with the last time domain position in a plurality of PDCCHs, or the target PDCCH is the PDCCH with the smallest resource identification in the plurality of PDCCHs; the plurality of PDCCHs are PDCCHs which correspond to one HARQ process identifier and are repeatedly transmitted by adopting a repeated transmission mode;

feeding back the HARQ-ACK on the PUCCH resources.

2. The method of claim 1, wherein the time domain location-last PDCCH comprises:

a last-symbol PDCCH among the plurality of PDCCHs.

3. The method of claim 1, wherein the plurality of PDCCHs are transmitted in a Frequency Division Multiplexing (FDM) manner, and the PDCCH at the last time domain position comprises:

4. The method of claim 3, wherein the PDCCH determined according to a resource identifier or a frequency domain location of the plurality of PDCCHs comprises:

5. The method of claim 3, wherein the resource identification comprises:

a search space identification or a control resource set CORESET identification.

6. The method of claim 1, wherein the feeding back the HARQ-ACK on the PUCCH resource if the target PDCCH is the multiple PDCCHs comprises:

7. The method of claim 6, wherein the terminal successfully demodulates a Physical Downlink Shared Channel (PDSCH) corresponding to the specific PDCCH; alternatively, the first and second electrodes may be,

8. The method of claim 1, wherein the plurality of PDCCHs comprise:

9. A terminal, comprising:

the determining module is used for determining PUCCH resources where the HARQ-ACK is located according to information of a target PDCCH, wherein the target PDCCH is the PDCCH with the last time domain position in a plurality of PDCCHs, or the target PDCCH is the PDCCH with the smallest resource identification in the plurality of PDCCHs; the plurality of PDCCHs are PDCCHs which correspond to one HARQ process identifier and are repeatedly transmitted by adopting a repeated transmission mode;

a feedback module, configured to feed back the HARQ-ACK on the PUCCH resource.

10. A terminal, comprising: memory, processor and 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 according to any of claims 1 to 8.

11. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the HARQ-ACK feedback method according to any one of claims 1 to 8.