CN110635868B

CN110635868B - HARQ-ACK processing method and device for hybrid automatic repeat request feedback information

Info

Publication number: CN110635868B
Application number: CN201810641481.2A
Authority: CN
Inventors: 鲁智; 潘学明; 沈晓冬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-06-21
Filing date: 2018-06-21
Publication date: 2021-02-09
Anticipated expiration: 2038-06-21
Also published as: CN110635868A; WO2019242527A1

Abstract

The embodiment of the invention discloses a hybrid automatic repeat request feedback information HARQ-ACK processing method and a device, wherein the method comprises the following steps: receiving target DCI, wherein the target DCI comprises a first HARQ process indication domain and a second HARQ process indication domain, the first HARQ process indication domain is used for indicating a HARQ process corresponding to first ACK/NACK, the second HARQ process indication domain is used for indicating a HARQ process corresponding to second ACK/NACK, the first ACK/NACK is ACK/NACK generated based on a currently transmitted transmission block, and the second ACK/NACK is ACK/NACK generated based on a historically transmitted transmission block; and sending the first ACK/NACK and the second ACK/NACK to the network equipment. The embodiment of the invention can avoid the problem of PDSCH retransmission caused by the fact that the terminal equipment cannot send ACK/NACK when detecting that the channel is busy.

Description

HARQ-ACK processing method and device for hybrid automatic repeat request feedback information

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a HARQ-ACK processing method and apparatus for HARQ-ACK.

Background

Currently, after receiving a Transport Block (TB) sent by a network device, a terminal device performs error detection on the received TB, and if the reception is correct, feeds back an Acknowledgement (ACK) response to the network device, and if the reception is incorrect, feeds back a Negative Acknowledgement (NACK) response to the network device. If the network equipment receives the ACK response, the network equipment continues to send the new TB, and if the network equipment receives the NACK response, the TB sent last time is retransmitted.

In a New radio in Unlicensed spectrum (NR-U) scenario, when feeding back ACK/NACK, a terminal device needs to listen to a channel of an Unlicensed spectrum in advance, and send the ACK/NACK if the channel is idle, or not send the ACK/NACK if the channel is busy.

It can be seen that if the channel is sensed to be busy, the terminal device will not be able to feed back ACK/NACK to the network device, and the network device will not obtain the corresponding ACK/NACK. In this case, the network device can only retransmit the TB that was previously transmitted, which results in a waste of communication resources.

Disclosure of Invention

The embodiment of the invention aims to provide a hybrid automatic repeat request feedback information HARQ-ACK processing method and a device, which are used for solving the technical problem of waste of communication resources in the prior art.

To solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, a method for processing HARQ-ACK of hybrid automatic repeat request feedback information is provided, which is applied to a terminal device, and the method includes:

receiving target Downlink Control Information (DCI), wherein the DCI comprises a first HARQ process indication domain and a second HARQ process indication domain, the first HARQ process indication domain is used for indicating a HARQ process corresponding to first ACK/NACK, the second HARQ process indication domain is used for indicating a HARQ process corresponding to second ACK/NACK, the first ACK/NACK is generated based on a currently transmitted transmission block, the second ACK/NACK is generated based on a transmission block transmitted in history, and the generated ACK/NACK based on the transmission block transmitted in history is not fed back or fails to be fed back;

and sending the first ACK/NACK and the second ACK/NACK to network equipment.

In a second aspect, a HARQ-ACK processing method is proposed, which is applied to a network device, and the method includes:

sending target DCI to terminal equipment, wherein the target DCI comprises a first HARQ process indication domain and a second HARQ process indication domain, the first HARQ process indication domain is used for indicating a HARQ process corresponding to first ACK/NACK, the second HARQ process indication domain is used for indicating a HARQ process corresponding to second ACK/NACK, the first ACK/NACK is generated based on a currently transmitted transmission block, the second ACK/NACK is generated based on a transmission block transmitted in history, and the generated ACK/NACK based on the transmission block transmitted in history is not fed back or fails to be fed back;

receiving the first ACK/NACK and the second ACK/NACK from the terminal device.

In a third aspect, an apparatus for HARQ-ACK processing is provided, where a terminal device is applied, the apparatus includes:

a first receiving module, configured to receive target DCI, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, where the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a historically transmitted transport block, and the ACK/NACK generated based on the historically transmitted transport block is not fed back or fails to be fed back;

a first sending module, configured to send the first ACK/NACK and the second ACK/NACK to a network device.

In a fourth aspect, an HARQ-ACK processing apparatus is provided, which is applied to a network device, and the apparatus includes:

a second sending module, configured to send target DCI to a terminal device, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in history, and the ACK/NACK generated based on the transport block transmitted in history is not fed back or fails to be fed back;

a third receiving module, configured to receive the first ACK/NACK and the second ACK/NACK from the terminal device.

In a fifth aspect, a terminal device is provided, which includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the HARQ-ACK processing method applied to a terminal device as described above.

In a sixth aspect, a network device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the HARQ-ACK processing method applied to a network device as described above.

In a seventh aspect, a computer-readable storage medium is proposed, on which a computer program is stored, which, when being executed by a processor, implements the above-mentioned steps of the HARQ-ACK processing method applied to a terminal device.

In an eighth aspect, a computer-readable storage medium is proposed, on which a computer program is stored, which, when being executed by a processor, realizes the above-mentioned steps of the HARQ-ACK processing method applied to a network device.

As can be seen from the technical solutions provided by the embodiments of the present invention, the solution of the embodiments of the present invention has at least one of the following technical effects:

in the embodiment of the invention, the DCI can be used for indicating the terminal equipment to send the ACK/NACK of the PDSCH which is currently transmitted and also sending the ACK/NACK which is not fed back or fails to be fed back before, so that the problem of PDSCH retransmission caused by the fact that the terminal equipment cannot send the ACK/NACK when detecting that a channel is busy is avoided, and the purposes of saving communication resources and improving the effectiveness of data transmission can be achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a HARQ-ACK processing method of one embodiment of the present invention;

fig. 2 is a diagram of an example of a HARQ-ACK processing method according to an embodiment of the present invention;

fig. 3 is a flowchart of a HARQ-ACK processing method of another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an HARQ-ACK processing apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a HARQ-ACK processing apparatus according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

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

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is a part of the embodiment of the present invention, but not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM), a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS) System, a Long Term Evolution (Long Term Evolution, LTE) System, a Frequency Division Duplex (FDD) System, a Time Division Duplex (TDD) System, a Universal Mobile telecommunications System (Universal Mobile telecommunications System, UMTS), or a world wide Interoperability for Microwave Access (max) communication System, a 5G System, or a New Radio, NR, and subsequent communication systems.

In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.

The network device involved in the embodiment of the invention is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, referred to as an Evolved node B (Evolved NodeB, eNB or eNodeB), in a third Generation (3G) network, referred to as a node B (node B), or a device on a network side in a subsequent Evolved communication system, and so on.

The embodiment of the invention provides a hybrid automatic repeat request feedback information HARQ-ACK processing method and a device. The following first introduces a HARQ-ACK processing method provided in an embodiment of the present application. For ease of understanding, some concepts involved in embodiments of the present invention are described.

Acknowledgement (ACK)/Not Acknowledgement (NACK) feedback procedure: before transmitting a Transport Block (TB) to a terminal device through a Physical Downlink Shared Channel (PDSCH), a network device (e.g., a gNB) transmits Downlink Control Information (DCI) to the terminal device through a PDCCH, where the DCI includes: uplink and downlink resource allocation, Hybrid Automatic Repeat Request (HARQ) information, Transmit Power Control (TPC) information, and other information, that is, the DCI carries information of correspondence between the PDSCH and the HARQ process and the PUCCH or the PUSCH.

The terminal equipment performs blind detection, detects a PDCCH carrying the DCI, determines which PDSCH receives the TB sent by the network equipment and caches the received TB in which HARQ process according to information carried in the DCI after the DCI is detected, and generates corresponding ACK/NACK for the TB cached in the HARQ process after the terminal equipment caches the received TB in the corresponding HARQ process. In addition, the terminal device may determine, according to information carried in the DCI, on which Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) the ACK/NACK is transmitted, and then transmit the ACK/NACK on the corresponding PUCCH or PUSCH.

It should be noted that, for convenience of description and understanding, in some scenarios, the "PDSCH" is sometimes used to refer to "information transmitted on PDSCH, such as TB", and the "PDCCH" is sometimes used to refer to "information transmitted on PDCCH".

Fig. 1 is a flowchart of a HARQ-ACK processing method according to an embodiment of the present invention, which is applied to a terminal device, and as shown in fig. 1, the method may include the following steps: step 101 and step 102, wherein,

in step 101, target DCI is received, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a historically transmitted transport block, and the ACK/NACK generated based on the historically transmitted transport block is not fed back or fails to be fed back.

In this embodiment of the present invention, "currently transmitted transport block" and "historically transmitted transport block" are two relative concepts, "currently transmitted transport block" refers to the TB that is received by the terminal device most recently, "historically transmitted transport block" refers to the TB that is received by the terminal device before, and the first ACK/NACK is: and the terminal equipment generates ACK/NACK based on the latest received TB, and the second ACK/NACK is as follows: the terminal device generates an ACK/NACK based on the previously received TB, and the ACK/NACK is not fed back or fails to be fed back because the channel is busy.

In the embodiment of the invention, the terminal equipment can be instructed to feed back the first ACK/NACK and the second ACK/NACK at the same time in an explicit indication mode, namely, the ACK/NACK generated based on the latest received TB and the ACK/NACK failed in the previous feedback are fed back to the network equipment at the same time; or, the terminal device may also be instructed to feed back the second ACK/NACK together with the first ACK/NACK in an implicit instruction manner, which is not limited in the embodiment of the present invention.

The following describes the explicit indication and implicit indication in detail.

Firstly, an explicit indication mode:

in other words, the terminal device only feeds back ACK/NACK generated based on the latest received TB to the network device, and does not feed back failed ACK/NACK to the network device before the terminal device receives the ACK/NACK.

In order to instruct the terminal device to feed back the first ACK/NACK and the second ACK/NACK at the same time, in the embodiment of the present invention, an HARQ process indication field, that is, a second HARQ process indication field, may be additionally added in the DCI, where the second HARQ process indication field is used to indicate an HARQ process identifier corresponding to the second ACK/NACK.

For convenience of understanding, the embodiment of the present invention is described with reference to a specific example, as shown in fig. 2, a PUCCH1 associates 3 PDSCHs (that is, ACK/NACK generated based on TBs transmitted on the 3 PDSCHs is transmitted on a PUCCH 1), and HARQ processes used by the PDSCHs are respectively: procedures 1, 2, 3 (defined as PDSCH group 1 for convenience of description). PUCCH2 associates 3 PDSCHs (that is, ACK/NACK generated based on TBs transmitted on these 3 PDSCHs, transmitted on PUCCH 2), and the HARQ processes used by the PDSCHs are respectively: procedures 4, 5, 6 (defined as PDSCH group 2 for ease of description).

For example, ACK/NACK corresponding to PDSCH of processes 1, 2, and 3 needs to be fed back at time t1, but since the terminal device listens to the channel as busy, the corresponding ACK/NACK is not transmitted on PUCCH 1. The network device may add a second HARQ process indication field to the scheduling DCI of the PDSCH associated with the PUCCH2 for subsequent transmission, where the second HARQ process indication field is used to indicate processes 1, 2, 3, and then the terminal device may send ACK/NACK of the current scheduling (HARQ processes 4, 5, 6) and ACK/NACK of the previous transmission failure (processes 1, 2, 3) on PUCCH2 after receiving the DCI.

In this embodiment of the present invention, the second HARQ process indication field may include: a HARQ process bitmap (bitmap) corresponding to the second ACK/NACK, for example, in the example shown in fig. 2, the process bitmap is 1110000000000000, which represents HARQ processes 1, 2, and 3; in addition, considering that bitmap is used to indicate the HARQ process ID to be fed back, the current scheduling may be indicated together, for example, in the example shown in fig. 2, the process bitmap is 1111110000000000, which represents HARQ processes 1, 2, 3, 4, 5, and 6.

In the embodiment of the present invention, in the case that the total number of HARQ processes in the terminal device is 16, if it is desired to obtain complete flexibility, a bitmap indication field of 16 bits (bits) needs to be added in DCI to indicate whether ACK/NACK that has not been transmitted before or failed to be transmitted together while ACK/NACK generated based on the latest received TB needs to be transmitted.

In the embodiment of the present invention, in order to reduce the bit overhead in DCI, HARQ processes may be grouped, and at this time, the second HARQ process indication field may include: and the HARQ process grouping identification corresponding to the second ACK/NACK.

In one example, the total number of HARQ processes in the terminal device is 16, for example, if the HARQ processes are divided into 2 groups, the second HARQ process indication field includes 2 bits, 1bit is used to indicate that the HARQ process ID is 1-8, and another bit is used to indicate that the HARQ process ID is 9-16, so that only 2 bits are required for indicating the HARQ process. If the second HARQ process indication field is: 10, the terminal device additionally transmits ACK/NACK corresponding to HARQ processes 1-8 at the same time as transmitting ACK/NACK generated based on the latest received TB. Preferably, more refined grouping is also possible, for example, 4 groups can be divided, which is indicated by 4 bits, i.e. HARQ process IDs of each group are 1-4, 5-8, 9-12, 13-16, respectively.

In the embodiment of the present invention, it may be limited that the terminal device in the NR-U scenario only uses a part of HARQ processes, and specifically, it may be limited that the number of HARQ processes used by the terminal device in the NR-U scenario is limited to reduce the overhead of bits in DCI, at this time, before step 101, the following steps may be further added:

receiving Radio Resource Control (RRC) signaling, wherein the RRC signaling is used for configuring the number of available HARQ processes in the terminal equipment, and the number of the available HARQ processes is greater than or equal to 2; and setting the number of the available HARQ processes in the terminal equipment according to the RRC signaling.

In the embodiment of the invention, the available HARQ process refers to the HARQ process which can be used for caching the TB in the terminal equipment, and the terminal equipment generates ACK/NACK aiming at the TB cached in the available HARQ process.

In one example, for example, the terminal device may be configured to use only HARQ processes with IDs 1 to 8, so that only a bitmap second HARQ process indication field of 8 bits needs to be added to DCI.

II, implicit indication mode:

in the embodiment of the invention, the terminal equipment can be instructed to feed back the first ACK/NACK and the second ACK/NACK simultaneously through the PDCCH resource where the DCI is located, at the moment, the relevant information of the PDCCH where the DCI is located has a mapping relation with the HARQ process, and the mapping relation can be configured by a network; and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the target DCI is located.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: and identifying a target control resource set (CORESET), wherein the target CORESET is a CORESET corresponding to the PDCCH, and the CORESET corresponding to the PDCCH refers to the CORESET where the PDCCH is located. That is, there is a mapping relationship between the coreset id corresponding to the PDCCH where the DCI is located and the HARQ process.

In one example, the mapping relationship may include: odd CORESET IDs correspond to HARQ processes 1-8, even CORESET IDs correspond to HARQ processes 9-16; alternatively, the mapping relationship may include: a core set ID modulo 3 to 0 corresponds to feeding back only the first ACK/NACK (i.e., the ACK/NACK generated based on the latest received TB), a core set ID modulo 3 to 1 corresponds to feeding back the first ACK/NACK and the second ACK/NACK corresponding to the HARQ processes 1 to 8, and a core set ID modulo 3 to 2 corresponds to feeding back the first ACK/NACK and the second ACK/NACK corresponding to the HARQ processes 9 to 16.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: identification of a target search space (search space), wherein the target search space is a search space corresponding to the PDCCH, and the search space corresponding to the PDCCH refers to the search space in which the PDCCH is located. That is, there is a mapping relationship between the search space ID corresponding to the PDCCH where the DCI is located and the HARQ process.

In one example, the mapping relationship may include: the odd search space IDs correspond to HARQ processes 1-8, and the even search space IDs correspond to HARQ processes 9-16; alternatively, the mapping relationship may include: the search space ID with modulo 3 being 0 corresponds to feeding back only the first ACK/NACK, the search space ID with modulo 3 being 1 corresponds to feeding back the first ACK/NACK and the second ACK/NACK corresponding to HARQ processes 1-8, and the search space ID with modulo 3 being 2 corresponds to feeding back the first ACK/NACK and the second ACK/NACK corresponding to HARQ processes 9-16.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: an identification of a target Control Channel Element (CCE), wherein the target CCE is a starting CCE of the PDCCH. That is, the mapping relationship exists between the starting CCE ID of the PDCCH on which the DCI is located and the HARQ process.

In one example, the mapping relationship may include: odd CCE IDs correspond to HARQ processes 1-8 and even CCE IDs correspond to HARQ processes 9-16.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: ACK/NACK resource index (ARI) information in DCI carried on PDCCH. That is, the ARI in the DCI carried on the PDCCH has a mapping relationship with the HARQ process.

In one example, the mapping relationship may include: the first half of the total number of ARI use configuration resources corresponds to HARQ processes 1-8, and the second half of the total number of ARI use configuration resources corresponds to HARQ processes 9-16. Or the ARI indicates that the first third (rounded down) of the total number of configured resources corresponds to feeding back only the first ACK/NACK, the ARI indicates that the middle third (rounded down) of the total number of configured resources corresponds to feeding back the first ACK/NACK and the second ACK/NACK corresponding to the HARQ processes 1 to 8, and the ARI indicates that the first ACK/NACK and the second ACK/NACK corresponding to the HARQ processes 9 to 16 are fed back when the remaining resources of the total number of configured resources are configured.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: TPC information in DCI carried on PDCCH. That is, the TPC in the DCI has a mapping relationship with the HARQ process.

In one example, the mapping relationship may include: TPC indication 0, 2 corresponds to HARQ processes 1-8 and TPC indication 1, 3 corresponds to HARQ processes 9-16.

Optionally, in this embodiment of the present invention, the information related to the PDCCH may include: cyclic Redundancy Check (CRC) information of DCI carried on a PDCCH. That is, the CRC of the DCI has a mapping relationship with the HARQ process.

In an example, the currently used CRC length is 24 bits, 16 bits of the CRC are scrambled by a Radio Network Temporary Identity (RNTI) of the terminal device, and the remaining 8 bits can be used, at this time, a sequence with a length of 8 bits, for example, a ZC sequence, a Walsh sequence, etc., can be designed to scramble the 8 bits, which helps to indicate different packets. If the HARQ processes are divided into 3 groups (e.g., HARQ processes 1-5, HARQ processes 6-10, and HARQ processes 11-16), 4 scrambling codes may be configured for the terminal device, and the terminal device descrambles the 4 scrambling codes to obtain corresponding grouping information, i.e., HARQ process ID indication information corresponding to the second ACK/NACK. For example, scrambling is performed with 4 scrambling codes as follows:

scrambling code 1: [ 11111111 ], instructing the terminal equipment to feed back only ACK/NACK corresponding to the currently transmitted TB;

scrambling code 2: [ 11-1-111-1-1 ], indicating the terminal equipment to feed back ACK/NACK corresponding to the currently transmitted TB and simultaneously feeding back ACK/NACK corresponding to HARQ processes 1-5;

scrambling code 3: 1111-1-1-1, indicating the terminal equipment to feed back the ACK/NACK corresponding to the currently transmitted TB and simultaneously feed back the ACK/NACK corresponding to the HARQ process 6-10;

scrambling 4: [ 1-1-11-111-1 ], instructing the terminal equipment to feed back ACK/NACK corresponding to the currently transmitted TB and simultaneously feeding back ACK/NACK corresponding to the HARQ process 11-16.

The information may be carried in a PDCCH for scheduling a PUSCH or in DCI.

It should be noted that if the additionally fed-back HARQ process ID coincides with the currently scheduled HARQ ID, different processing behaviors of the terminal device may be specified: the terminal equipment feeds back ACK/NACK corresponding to the currently scheduled HARQ process ID and additionally feeds back ACK/NACK corresponding to the HARQ process ID; or only feeding back the ACK/NACK of the non-overlapped part in the additionally fed HARQ process ID.

In step 102, a first ACK/NACK and a second ACK/NACK are sent to the network device.

In the embodiment of the invention, under the condition of explicit indication, after receiving DCI, the terminal equipment determines the HARQ process corresponding to the first ACK/NACK and the HARQ process corresponding to the second ACK/NACK according to the DCI, and further determines the first ACK/NACK and the second ACK/NACK according to the determined HARQ processes.

In the embodiment of the invention, under the condition of implicit indication, after receiving DCI, the terminal equipment determines the HARQ process corresponding to the second ACK/NACK according to the related information of the PDCCH resource where the DCI is located, and then determines the second ACK/NACK according to the ID of the HARQ process.

In the embodiment of the invention, the first ACK/NACK and the second ACK/NACK can be jointly coded or independently coded.

In the embodiment of the invention, when the feedback is carried out to the network equipment, the first ACK/NACK and the second ACK/NACK can not be compressed. Or, in order to reduce the feedback load, the first ACK/NACK and the second ACK/NACK may be compressed and fed back after compression.

In this embodiment of the present invention, when there are multiple second ACKs/NACKs, to reduce feedback load, the ACKs/NACKs corresponding to different HARQ process IDs may be bound, and at this time, step 102 may specifically include the following steps:

binding (bundling) the second ACK/NACK to obtain the bound ACK/NACK; and sending the first ACK/NACK and the bundled ACK/NACK to the network equipment.

In the embodiment of the present invention, the binding manner may include: and operation is carried out on two ACK/NACK, wherein, the two ACK are subjected to AND operation to obtain one ACK, the two NACK are subjected to AND operation to obtain one NACK, and the one ACK and the one NACK are subjected to AND operation to obtain one NACK.

In one example, 4-bit ACK/NACK information needs to be fed back for HARQ processes 1-4, if a binding mode is adopted, the ACK/NACK of the HARQ processes 1-2 is bound to form 1bit, and the ACK/NACK of the HARQ processes 3-4 is bound to form 1bit, so that only 2-bit ACK/NACK information needs to be fed back additionally.

As can be seen from the above embodiments, in this embodiment, the DCI may be used to instruct the terminal device to send ACK/NACK of the currently transmitted PDSCH and send ACK/NACK that is not fed back or fails to be fed back before, so as to avoid the problem of PDSCH retransmission caused by the fact that the terminal device cannot send ACK/NACK when detecting that the channel is busy, and achieve the purposes of saving communication resources and improving data transmission effectiveness.

Fig. 3 is a flowchart of a HARQ-ACK processing method according to an embodiment of the present invention, which is applied to a terminal device, and as shown in fig. 3, the method may include the following steps: step 301 and step 302, wherein,

in step 301, target DCI is sent to the terminal device, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in history, and the ACK/NACK generated based on the transport block transmitted in history is not fed back or fails to be fed back.

First, the manner of the explicit indication is explained in detail:

the DCI in the prior art only includes the first HARQ indication field, and the terminal device only feeds back the first ACK/NACK and does not feed back the second ACK/NACK after receiving the DCI in the prior art.

In the embodiment of the present invention, it may be limited that the terminal device in the NR-U scenario only uses a part of HARQ processes, and specifically, it may be limited that the number of HARQ processes used by the terminal device in the NR-U scenario is limited to reduce the overhead of bits in DCI, and at this time, the following steps may be added before step 301:

and sending RRC signaling to the terminal equipment, wherein the RRC signaling is used for configuring the number of the available HARQ processes in the terminal equipment, and the number of the available HARQ processes is more than or equal to 2.

The manner of implicit indication is explained in detail below:

In this embodiment of the present invention, the related information of the PDCCH may include: and identifying a target control resource set (CORESET), wherein the target CORESET is a CORESET corresponding to the PDCCH, and the CORESET corresponding to the PDCCH refers to the CORESET where the PDCCH is located. That is, there is a mapping relationship between the CORESET ID corresponding to the PDCCH where the DCI is located and the HARQ process.

The information may be carried in a PDCCH for scheduling a PUSCH or in DCI.

In step 302, a first ACK/NACK and a second ACK/NACK from a terminal device are received.

In the embodiment of the invention, the first ACK/NACK and the second ACK/NACK sent by the terminal equipment can be joint coding or independent coding.

In the embodiment of the invention, when feeding back to the network equipment, the terminal equipment may not compress the first ACK/NACK and the second ACK/NACK, and at this time, the ACK/NACK received by the network equipment is not compressed. Or in order to reduce the feedback load, the terminal device may compress the first ACK/NACK and the second ACK/NACK, and feed back after compressing, where the ACK/NACK received by the network device is compressed.

In the embodiment of the present invention, when a plurality of second ACKs/NACKs are provided, in order to reduce a feedback load, the terminal device may bind (bundling) the ACKs/NACKs corresponding to different HARQ process IDs, specifically, bind the second ACKs/NACKs to obtain the bound ACKs/NACKs; and sending the first ACK/NACK and the bundled ACK/NACK to the network equipment. Accordingly, the network device receives the first ACK/NACK and the bundled ACK/NACK.

Fig. 4 is a schematic structural diagram of a HARQ-ACK processing apparatus according to an embodiment of the present invention, where the HARQ-ACK processing apparatus is applied to a terminal device, and as shown in fig. 4, the HARQ-ACK processing apparatus 400 may include: a first receiving module 401 and a first transmitting module 402, wherein,

a first receiving module 401, configured to receive target DCI, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, where the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in history, and the ACK/NACK generated based on the transport block transmitted in history is not fed back or fails to be fed back;

a first sending module 402, configured to send the first ACK/NACK and the second ACK/NACK to a network device.

Optionally, as an embodiment, the second HARQ process indication field is configured to indicate a HARQ process id corresponding to the second ACK/NACK.

Optionally, as an embodiment, the second HARQ process indication field includes any one of the following:

the HARQ process bitmap corresponding to the second ACK/NACK, and the HARQ process grouping identifier corresponding to the second ACK/NACK.

Optionally, as an embodiment, the HARQ-ACK processing apparatus 400 may further include:

a second receiving module, configured to receive a radio resource control RRC signaling, where the RRC signaling is used to configure the number of available HARQ processes in the terminal device, and the number of available HARQ processes is greater than or equal to 2;

and the setting module is used for setting the number of the available HARQ processes in the terminal equipment according to the RRC signaling.

Optionally, as an embodiment, there is a mapping relationship between related information of a physical downlink control channel PDCCH where DCI is located and an HARQ process;

and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the target DCI is located.

Optionally, as an embodiment, the related information of the PDCCH includes at least one of the following:

an identifier of a target control resource set (CORESET), an identifier of a target search space, an identifier of a target Control Channel Element (CCE), ACK/NACK resource index (ARI) information in DCI (Downlink control information) carried on the PDCCH, Transmission Power Control (TPC) information in the DCI carried on the PDCCH and Cyclic Redundancy Check (CRC) information of the DCI carried on the PDCCH;

the target CORESET is the CORESET corresponding to the PDCCH, the target search space is the search space corresponding to the PDCCH, and the target CCE is the initial CCE of the PDCCH.

Optionally, as an embodiment, the second ACK/NACK is multiple; the first sending module 402 may include:

a binding submodule, configured to bind the second ACK/NACK to obtain a bound ACK/NACK;

and the sending submodule is used for sending the first ACK/NACK and the bound ACK/NACK to network equipment.

Fig. 5 is a schematic structural diagram of a HARQ-ACK processing apparatus according to another embodiment of the present invention, which is applied to a network device, and as shown in fig. 5, the HARQ-ACK processing apparatus 500 may include: a second sending module 501 and a third receiving module 502, wherein,

a second sending module 501, configured to send target DCI to a terminal device, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, where the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in history, and the ACK/NACK generated based on the transport block transmitted in history is not fed back or fails to be fed back;

a third receiving module 502, configured to receive the first ACK/NACK and the second ACK/NACK from the terminal device.

Optionally, as an embodiment, the HARQ-ACK processing apparatus 500 may further include:

a third sending module, configured to send an RRC signaling to the terminal device, where the RRC signaling is used to configure the number of available HARQ processes in the terminal device, and the number of available HARQ processes is greater than or equal to 2.

Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application, and as shown in fig. 6, the terminal device 600 includes: at least one processor 601, memory 602, at least one network interface 604, and a user interface 603. The various components in the terminal device 600 are coupled together by a bus system 605. It is understood that the bus system 605 is used to enable communications among the components. The bus system 605 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 605 in fig. 6.

The user interface 603 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen).

It will be appreciated that the memory 602 in the subject embodiment can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 602 of the systems and methods described in embodiments herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 602 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 6021 and application programs 6022.

The operating system 6021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application program 6022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program that implements the methods of the embodiments of the present application can be included in the application program 6022.

In this embodiment of the present application, the terminal device 600 further includes: a computer program stored on the memory 602 and executable on the processor 601, the computer program when executed by the processor 601 performing the steps of:

and sending the first ACK/NACK and the second ACK/NACK to network equipment.

The method disclosed in the embodiments of the present application may be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 601, implements the steps of the above-described HARQ-ACK processing method embodiments.

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

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

Furthermore, the computer program, when executed by the processor 601, may further implement the steps of:

Optionally, as an embodiment, before the step of receiving the target downlink control information DCI, the method further includes:

receiving Radio Resource Control (RRC) signaling, wherein the RRC signaling is used for configuring the number of available HARQ processes in the terminal equipment, and the number of the available HARQ processes is greater than or equal to 2;

and setting the number of the available HARQ processes in the terminal equipment according to the RRC signaling.

Optionally, as an embodiment, the second ACK/NACK is multiple; the sending the first ACK/NACK and the second ACK/NACK to a network device includes:

binding the second ACK/NACK to obtain bound ACK/NACK;

and sending the first ACK/NACK and the bundled ACK/NACK to network equipment.

The terminal device 600 can implement each process implemented by the terminal device in the foregoing embodiments, and details are not repeated here to avoid repetition.

Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 7, a network device 700 includes: a processor 701, a transceiver 702, a memory 703, a user interface 704 and a bus interface, wherein:

in this embodiment of the present invention, the network device 700 further includes: a computer program stored on the memory 703 and executable on the processor 701, the computer program when executed by the processor 701 performing the steps of:

receiving the first ACK/NACK and the second ACK/NACK from the terminal device.

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

The processor 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.

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 processing method applied to the terminal device, and can achieve the same technical effect, and is not described herein again 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 processing method embodiment applied to the network device, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The embodiment of the invention also provides a computer program product comprising instructions, and when a computer runs the instructions of the computer program product, the computer executes the HARQ-ACK processing method applied to the terminal equipment. In particular, the computer program product may be run on the terminal device described above.

An embodiment of the present invention further provides a computer program product including instructions, and when a computer runs the instructions of the computer program product, the computer executes the HARQ-ACK processing method applied to the network device. In particular, the computer program product may be run on the network device described above.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

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

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A HARQ-ACK processing method of hybrid automatic repeat request feedback information is applied to terminal equipment, and is characterized in that the method comprises the following steps:

receiving target Downlink Control Information (DCI), wherein the DCI comprises a first HARQ process indication domain and a second HARQ process indication domain, the first HARQ process indication domain is used for indicating a HARQ process corresponding to first ACK/NACK, the second HARQ process indication domain is used for indicating a HARQ process corresponding to second ACK/NACK, the first ACK/NACK is generated based on a currently transmitted transmission block, the second ACK/NACK is generated based on a transmission block transmitted in history, and the second ACK/NACK is not fed back or fails to be fed back; the second HARQ process indication domain is used for indicating a HARQ process identifier corresponding to second ACK/NACK; or the relevant information of the physical downlink control channel PDCCH where the DCI is located has a mapping relation with the HARQ process, and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the second HARQ process indication domain is located;

and sending the first ACK/NACK and the second ACK/NACK to network equipment.

2. The method according to claim 1, characterized in that the second HARQ process indication field comprises any of:

3. The method according to claim 1, wherein before the step of receiving the target downlink control information DCI, the method further comprises:

4. The method of claim 1, wherein the information related to the PDCCH comprises at least one of:

5. The method of claim 1, wherein the second ACK/NACK is plural; the sending the first ACK/NACK and the second ACK/NACK to a network device includes:

binding the second ACK/NACK to obtain bound ACK/NACK;

and sending the first ACK/NACK and the bundled ACK/NACK to network equipment.

6. A HARQ-ACK processing method is applied to network equipment, and is characterized by comprising the following steps:

sending target DCI to terminal equipment, wherein the target DCI comprises a first HARQ process indication domain and a second HARQ process indication domain, the first HARQ process indication domain is used for indicating a HARQ process corresponding to first ACK/NACK, the second HARQ process indication domain is used for indicating a HARQ process corresponding to second ACK/NACK, the first ACK/NACK is ACK/NACK generated based on a currently transmitted transmission block, the second ACK/NACK is ACK/NACK generated based on a transmission block transmitted in history, and the second ACK/NACK is not fed back or fails to be fed back; the second HARQ process indication domain is used for indicating a HARQ process identifier corresponding to second ACK/NACK; or the relevant information of the physical downlink control channel PDCCH where the DCI is located has a mapping relation with the HARQ process, and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the second HARQ process indication domain is located;

receiving the first ACK/NACK and the second ACK/NACK from the terminal device.

7. The method of claim 6, wherein before the step of sending the target DCI to the terminal device, the method further comprises:

and sending RRC signaling to the terminal equipment, wherein the RRC signaling is used for configuring the number of available HARQ processes in the terminal equipment, and the number of the available HARQ processes is greater than or equal to 2.

8. An apparatus for processing HARQ-ACK, which is applied to a terminal device, the apparatus comprising:

a first receiving module, configured to receive target DCI, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, where the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in a history, and the second ACK/NACK is not fed back or fails to be fed back; the second HARQ process indication domain is used for indicating a HARQ process identifier corresponding to second ACK/NACK; or the relevant information of the physical downlink control channel PDCCH where the DCI is located has a mapping relation with the HARQ process, and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the second HARQ process indication domain is located;

9. The apparatus of claim 8, wherein the second HARQ process indication field includes any of:

10. The apparatus of claim 8, further comprising:

11. The apparatus of claim 8, wherein the information related to the PDCCH comprises at least one of:

12. The apparatus of claim 8, wherein the second ACK/NACK is plural; the first transmitting module includes:

13. An apparatus for processing HARQ-ACK, applied to a network device, the apparatus comprising:

a second sending module, configured to send target DCI to a terminal device, where the target DCI includes a first HARQ process indication field and a second HARQ process indication field, where the first HARQ process indication field is used to indicate a HARQ process corresponding to a first ACK/NACK, the second HARQ process indication field is used to indicate a HARQ process corresponding to a second ACK/NACK, the first ACK/NACK is an ACK/NACK generated based on a currently transmitted transport block, the second ACK/NACK is an ACK/NACK generated based on a transport block transmitted in a history, and the second ACK/NACK is not fed back or fails to be fed back; the second HARQ process indication domain is used for indicating a HARQ process identifier corresponding to second ACK/NACK; or the relevant information of the physical downlink control channel PDCCH where the DCI is located has a mapping relation with the HARQ process, and the HARQ process corresponding to the second ACK/NACK is the HARQ process corresponding to the relevant information of the PDCCH where the second HARQ process indication domain is located;

14. The apparatus of claim 13, further comprising:

15. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when being executed by the processor, carries out the steps of the HARQ-ACK processing method according to any of the claims 1 to 5.

16. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when being executed by the processor, carries out the steps of the HARQ-ACK processing method according to any of the claims 6 or 7.

17. 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 processing method according to any one of claims 1 to 5.

18. 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 processing method according to claim 6 or 7.