Information Feedback Method and Apparatus

Abstract

In an embodiment of the present invention, an information feedback method and an information receiving method and device are provided, the information feedback method including: the terminal device receiving at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), the DCI scheduling one or more PDSCHs, the one or more PDSCHs including at least one PDSCH corresponding to a HARQ process for which HARQ feedback is enabled or disabled; and the terminal device transmitting HARQ feedback information for one or more PDSCHs.

Description

Technical Field

[0001] The present invention relates to the technical field of communications.

Background Art

[0002] The Physical Downlink Shared Channel (PDSCH) is a type of physical downlink channel in a wireless communication system and is used to carry downlink data. The PDSCH may be scheduled by downlink control information (DCI). The DCI for scheduling the PDSCH includes at least information for indicating the resources of the PDSCH. In the current new radio (NR) system, a plurality of DCI formats for scheduling the PDSCH, for example, DCI format 1_0, DCI format 1_1, DCI format 1_2, etc. are defined, and the specific information and / or size included in the DCI of different DCI formats are different to meet different scheduling needs.

[0003] It should be noted that the introduction of the above background art is for clearly and completely explaining the technical solution of the present invention and for facilitating understanding by those skilled in the art. These technical solutions should not be construed as well-known to those skilled in the art just because they are described in the background art of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Currently, Non-Terrestrial Networks (NTN) is an issue being discussed in 3GPP (registered trademark). In this issue, in order to address relatively long propagation latency, how to support the Hybrid Automatic Repeat reQuest (HARQ) mechanism of "enabling / disabling HARQ feedback" is being discussed. However, currently, there is no specific method on how to support the HARQ mechanism of "enabling / disabling HARQ feedback", and there is also no method on whether / how to transmit HARQ feedback information in some cases where such a HARQ mechanism can be supported.

[0005] Also, in 3GPP (registered trademark), how to expand the NR system to 71 GHz is also being discussed. In this issue, in order to reduce the monitoring burden of the Physical Downlink Control Channel (PDDCH) of the terminal device, how to support the scheduling method of scheduling multiple Physical Downlink Shared Channels (PDSCHs) with one Downlink Control Information (DCI) (i.e., multi-PDSCHs scheduling) is being discussed. Currently, there is no discussion on whether / how to support the above-mentioned HARQ mechanism and the above-mentioned scheduling method simultaneously, there is no method on how to support them simultaneously, and there is also no method on whether / how to transmit HARQ feedback information in cases where the above-mentioned HARQ mechanism and the above-mentioned scheduling method can be supported simultaneously.

[0006] In view of at least one of the above problems, an embodiment of the present invention aims to provide an information feedback method and apparatus.

Means for Solving the Problem

[0007] According to one aspect of an embodiment of the present invention, an information feedback apparatus is provided, which is applied to a terminal device. The information feedback apparatus includes: a first receiving unit configured to receive at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), where the DCI schedules one or more PDSCHs, and among the one or more PDSCHs, at least one PDSCH corresponding to a hybrid automatic repeat request (HARQ) process with HARQ feedback being valid or invalid is included; and a first transmitting unit configured to transmit HARQ feedback information for one or more PDSCHs.

[0008] According to another aspect of an embodiment of the present invention, an information feedback apparatus is provided, which is applied to a terminal device. The information feedback apparatus includes: a second receiving unit configured to receive a fourth downlink control information (DCI), where the fourth DCI includes cumulative downlink assignment identifier (DAI) information and / or total DAI information; and a first determining unit configured to determine HARQ feedback information based on the cumulative DAI information and / or the total DAI information.

[0009] According to another aspect of an embodiment of the present invention, an information feedback apparatus is provided, which is applied to a terminal device. The information feedback apparatus includes: a fourth receiving unit configured to receive DCI for scheduling a PDSCH; a third determining unit configured to determine a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to a HARQ process with HARQ feedback being valid and scheduled by the DCI is located; and a second transmitting unit configured to transmit the HARQ feedback information of the PDSCH scheduled by the DCI at the determined time domain position.

Advantages of the Invention

[0010] The advantageous effects of the embodiments of the present invention are at least as follows When it is possible to support the HARQ mechanism of enabling / disabling HARQ feedback, HARQ feedback information can be transmitted or not transmitted, so that the overhead of uplink control signaling can be reduced. Also, since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0011] Also, when it is possible to support the HARQ mechanism of enabling / disabling HARQ feedback and the scheduling method of scheduling a plurality of PDSCHs by one DCI at the same time, HARQ feedback information can be transmitted or not transmitted. Therefore, by reducing the number of times the terminal device monitors the PDCCH, the complexity and power consumption of the terminal device for monitoring the PDCCH can be reduced, and by reducing the resource overhead for transmitting downlink control signaling (DCI), the data throughput can also be improved. Furthermore, the overhead of uplink control signaling can be reduced, and since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0012] Specific embodiments of the present invention are disclosed in detail by referring to the following description and drawings, showing aspects in which the principles of the present invention can be adopted. It should be noted that the embodiments of the present invention are not limited in scope by these. Within the scope of the appended claims, the embodiments of the present invention may include various changes, modifications and alternatives.

[0013] Furthermore, the features described and / or illustrated for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with the features in other embodiments, or replace the features in other embodiments.

[0014] Note that terms such as "comprising / including", when used in this specification, refer to the presence of features, elements, steps, or assemblies, but also refer to the fact that they do not exclude the presence or addition of one or more other features, elements, steps, or assemblies.

Brief Description of the Drawings

[0015] The elements and features described in one drawing or one embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Also, in the drawings, similar reference numerals indicate corresponding parts in several drawings and can also be used to indicate corresponding parts used in multiple embodiments.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15A

Figure 15B

Figure 15C

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Figure 27

Figure 28A

Figure 28B

Figure 28C

Figure 28D

Figure 29A

Figure 29B

Figure 29C

Figure 30A

Figure 30B

Figure 30C

Figure 31A

Figure 31B

Figure 31C

Figure 31D

Figure 32A

Figure 32B

Figure 32C

Figure 32D

Figure 33A

Figure 33B

Figure 34A

Figure 34B

Figure 35A

Figure 35B

Figure 35C

Figure 36A

Figure 36B

Figure 36C

Figure 36D

Embodiments for Carrying Out the Invention

[0016] By referring to the accompanying drawings and the following description, the foregoing and other features of the present invention will become apparent. Although specific embodiments of the present invention are disclosed in the specification and drawings, they are only some of the embodiments that can adopt the principles of the present invention. It should be understood that the present invention is not limited to the described embodiments, that is, the present invention also includes all changes, modifications, and substitutions within the scope of the appended patent claims.

[0017] In an embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, for example, LTE (Long Term Evolution), LTE-A (LTE-Advanced), WCDMA (registered trademark) (Wideband Code Division Multiple Access), HSPA (High-Speed Packet Access), and the like.

[0018] Also, the communication between devices in the communication system may be performed according to a communication protocol at any stage, for example, it may include, but is not limited to, the following communication protocols, that is, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and the like, and / or other conventional or future-developed communication protocols.

[0019] In an embodiment of the present invention, the term "network device" refers to, for example, a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system. The network device may include, but is not limited to, the following, that is, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), and the like.

[0020] Among them, the base station may include, but is not limited to, the following, namely, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may further include RRH (Remote Radio Head), RRU (Remote Radio Unit), relay or low-power node (for example, femto, pico, etc.). Also, the term "base station" may include some or all of their functions, and each base station can provide communication coverage for a specific geographical area. The term "cell" may refer to the base station and / or the area it covers, which depends on the context of the term. Note that the terms "cell" and "base station" are interchangeable as long as there is no confusion.

[0021] In the embodiments of the present invention, the term "user equipment" (UE, User Equipment) or "terminal equipment" (TE, Terminal Equipment) refers to, for example, a device that accesses a communication network by a network device and receives services from the network. The user equipment may be fixed or mobile, and is also referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), station, etc.

[0022] Among them, the user equipment may include, but is not limited to, the following, for example, cellular phone, PDA (Personal Digital Assistant), wireless modem, wireless communication device, portable device, machine type communication device, laptop computer, cordless telephone, smartphone, smartwatch, digital camera, etc.

[0023] Also, for example, in scenarios such as IoT (Internet of Things), the user device may further be a device or apparatus that performs monitoring or measurement. For example, it may include, but is not limited to, the following, namely, machine type communication (MTC) terminals, in-vehicle communication terminals, D2D (Device to Device) terminals, M2M (Machine to Machine) terminals, and the like.

[0024] Furthermore, the term "network side" or "network device side" refers to the side of the network, which may be a specific base station in some cases or may include one or more network devices as described above in other cases. The term "user side" or "terminal side" or "terminal device side" refers to the side of the user or terminal, which may be a specific UE or may include one or more terminal devices as described above.

[0025] In the following description, as long as there is no confusion, the term "uplink control signal" is interchangeable with "uplink control information (UCI)" or "physical uplink control channel (PUCCH)", the term "uplink data signal" is interchangeable with "uplink data information" or "physical uplink shared channel (PUSCH)", "received" and "detected" represent successful reception and are interchangeable, and "receive" and "detect" represent the ongoing operation without emphasizing whether the reception is successful and are interchangeable, and in some cases, they can also represent the reception result.

[0026] The term "downlink control signal" is interchangeable with "downlink control information (DCI)" or "physical downlink control channel (PDCCH)", and the term "downlink data signal" is interchangeable with "downlink data information" or "physical downlink shared channel (PDSCH)".

[0027] Also, the transmission or reception of PUSCH may be understood as transmitting or receiving uplink data carried by PUSCH, the transmission or reception of PUCCH may be understood as transmitting or receiving uplink information (e.g., UCI) carried by PUCCH, the transmission or reception of PRACH may be understood as transmitting or receiving a preamble carried by PRACH, the transmission or reception of PDSCH may be understood as transmitting or receiving downlink data carried by PDSCH, and the transmission or reception of PDCCH may be understood as transmitting or receiving downlink information (e.g., DCI) carried by PDCCH.

[0028] In an embodiment of the present invention, the upper layer signaling may be, for example, radio resource control (RRC) signaling. The RRC signaling includes, for example, an RRC message, specifically, for example, a master information block (MIB), system information, a dedicated RRC message; or an RRC information element (RRC IE); or an information field included in the RRC message or the RRC information element (or an information field included in the information field). The upper layer signaling may be, for example, further medium access control (MAC) signaling, or is referred to as a MAC control element (MAC CE). Note that the present invention is not limited thereto.

[0029] Hereinafter, the scenarios of the embodiments of the present invention will be described based on examples, but the present invention is not limited thereto.

[0030] FIG. 1 is a diagram showing a communication system in an embodiment of the present invention, taking a terminal device and a network device as examples. As shown in FIG. 1, the communication system 100 includes a network device 101 and terminal devices 102 and 103. For convenience, in FIG. 1, only two terminal devices and only one network device are taken as examples for explanation, but the embodiments of the present invention are not limited thereto.

[0031] In an embodiment of the present invention, existing services (traffic / services) or services that can be implemented in the future can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services include, but are not limited to, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), URLLC (Ultra-Reliable and Low-Latency Communication), and related communications of terminal devices with reduced capabilities.

[0032] Note that although FIG. 1 shows that both of the two terminal devices 102 and 103 are within the coverage of the network device 101, the present invention is not limited thereto. The two terminal devices 102 and 103 do not have to be all located within the coverage of the network device 101, or one terminal device 102 may be within the coverage of the network device 101, and the other terminal device 103 may be outside the coverage of the network device 101.

[0033] In the embodiments of the present invention, since the transport blocks carried by different PDSCHs may be the same or different, hereinafter, the "multiple PDSCHs" or "at least two PDSCHs" may refer to different PDSCHs that carry the same or different transport blocks. Specifically, the transport blocks carried by different PDSCHs may correspond to the same or different HARQ processes, among which the different HARQ processes have different HARQ process identifiers (IDs).

[0034] In some embodiments, the PDSCH time domain resource allocation (TDRA) table (or abbreviated as the TDRA table) includes at least one row. Hereinafter, for the sake of convenience, one row is referred to as one PDSCH TDRA setting (or abbreviated as the TDRA setting), that is, the PDSCH TDRA table includes at least one PDSCH TDRA setting. One PDSCH TDRA setting includes at least one PDSCH time domain resource setting (or abbreviated as the time domain resource setting). The PDSCH time domain resource setting includes at least the symbol position (start symbol + length) setting in a slot. Also, one PDSCH TDRA setting may further include at least one slot offset K0 setting, where K0 represents the slot offset between the PDSCH and the PDCCH. The K0 setting may be included in the PDSCH time domain resource setting or not included in the PDSCH time domain resource setting. One PDSCH TDRA setting may further include other information (for example, mapping type), and the other information may be included in the PDSCH time domain resource setting or not included in the PDSCH time domain resource setting. The embodiments of the present invention are not limited thereto. Among them, for the symbol position setting in a slot, it includes, for example, the start and length indicator SLIV, which corresponds to a valid combination of the start symbol (S) and the length (L), or it corresponds to, for example, the starting symbol setting and the length setting, and the starting symbol setting and the length setting are a valid combination.

[0035] Hybrid Automatic Repeat reQuest (HARQ) is a technology that combines the Forward Error Correction (FEC) and Automatic Repeat reQuest (ARQ) methods. By adding redundant information, FEC enables the receiving end to correct some errors, thus reducing the number of retransmissions. For errors that FEC cannot correct, the receiving end can request the transmitting end to retransmit the data through the ARQ mechanism. The receiving end uses an error detection code (usually Cyclic Redundancy Check (CRC)) to detect whether there are errors in the received data packet. If there is no error, the receiving end sends one positive acknowledgment (ACK) to the transmitting end, and after receiving the ACK, the transmitting end can subsequently send the next data packet. If there is an error, the receiving end drops the data packet and sends one negative acknowledgment (NACK) to the transmitting end, and after receiving the NACK, the transmitting end can retransmit the same data.

[0036] In NR, it is necessary to perform HARQ-ACK feedback for one or more (all or part) of the PDSCHs scheduled by DCI. For example, the terminal device can generate a HARQ-ACK codebook, which includes a semi-static codebook (Type-1 HARQ-ACK codebook) and a dynamic codebook (Type-2 HARQ-ACK codebook). The terminal can set the adoption of the Type-1 HARQ-ACK codebook or the Type-2 HARQ-ACK codebook according to the RRC signaling configuration.

[0037] Hereinafter, in conjunction with each embodiment, when it is possible to support that the invalidation of HARQ feedback or the activation of HARQ feedback is set or instructed in the HARQ process, it will be described how to generate or how to generate or how to transmit the above-mentioned semi-static codebook and / or dynamic codebook.

[0038] <Embodiment of the first aspect> In an embodiment of the present invention, an information feedback method is provided, and an explanation is given from the perspective of the terminal device.

[0039] FIG. 2 is a diagram showing an information feedback method in an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps.

[0040] 201: The terminal device receives at least one downlink control information (DCI) for scheduling the device physical downlink shared channel (PDSCH), and the DCI schedules one or more PDSCHs, among which, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback enabled or disabled; and 202: The terminal device transmits HARQ feedback information about one or more PDSCHSs.

[0041] In some embodiments, the terminal device receives downlink control information (DCI) for scheduling one or more PDSCHs. The DCI can schedule a plurality of PDSCHs, but in fact, it may schedule one PDSCH or a plurality of PDSCHs. Also, in the embodiments of the present invention, the plurality of PDSCHs may be a plurality of PDSCHs scheduled in the time domain, a plurality of PDSCHs scheduled in the frequency domain, or a plurality of PDSCHs in both the time domain and the frequency domain. For example, the PDSCH time domain resource allocation table used by the DCI when scheduling a plurality of PDSCHs in the time domain may support scheduling a plurality of PDSCHs by one DCI. It should be noted that the embodiments of the present invention are not limited thereto.

[0042] In some embodiments, at 201, the DCI and the PDSCH are transmitted on the same carrier (cell) or different carriers (cells). In other words, the PDSCH may be scheduled by the DCI on the same carrier (cell), or may be scheduled by the DCI on a different carrier (cell). When the DCI and the PDSCH are on different carriers (cells), the PDSCH is scheduled based on the settings corresponding to the carrier (cell) to be scheduled (e.g., the number of HARQ processes, the setting of enabling / disabling HARQ feedback, the setting of the PDSCH time domain resource allocation table, etc.).

[0043] FIG. 36A is a diagram showing that the DCI and the scheduled PDSCH are in the same BWP of the same carrier / cell. As shown in FIG. 14, (a) corresponds to scheduling one PDSCH (without limiting whether the DCI can schedule only one PDSCH or multiple PDSCHs), (b) corresponds to scheduling multiple PDSCHs in the time domain, the PDSCHs are indexed according to the order in the time domain, (c) corresponds to scheduling multiple PDSCHs in the frequency domain, the PDSCHs are indexed according to the order in the frequency domain, (d) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, the PDSCHs are indexed first according to the order in the frequency domain and then according to the order in the time domain, and (e) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, the PDSCHs are indexed first according to the order in the time domain and then according to the order in the frequency domain.

[0044] FIG. 36B is a diagram showing that the DCI and the scheduled PDSCH are in different BWPs of the same carrier / cell. As shown in FIG. 15, (a) corresponds to scheduling one PDSCH (without limiting whether the DCI can schedule only one PDSCH or multiple PDSCHs), (b) corresponds to scheduling multiple PDSCHs in the time domain, the PDSCHs are indexed according to the order in the time domain, (c) corresponds to scheduling multiple PDSCHs in the frequency domain, the PDSCHs are indexed according to the order in the frequency domain, (d) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, the PDSCHs are indexed first according to the order in the frequency domain and then according to the order in the time domain, and (e) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, the PDSCHs are indexed first according to the order in the time domain and then according to the order in the frequency domain.

[0045] FIG. 36C is a diagram showing that the DCI and the scheduled PDSCH are in different carriers / cells (cross-carrier scheduling). As shown in FIG. 16, (a) corresponds to scheduling one PDSCH (without limiting whether the DCI can schedule only one PDSCH or multiple PDSCHs), (b) corresponds to scheduling multiple PDSCHs in the time domain, where the PDSCHs are indexed according to the order in the time domain, (c) corresponds to scheduling multiple PDSCHs in the frequency domain, where the PDSCHs are indexed according to the order in the frequency domain, (d) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, where the PDSCHs are indexed first according to the order in the frequency domain and then according to the order in the time domain, and (e) corresponds to scheduling multiple PDSCHs in both the time domain and the frequency domain, where the PDSCHs are indexed first according to the order in the time domain and then according to the order in the frequency domain.

[0046] Figure 36D is a diagram showing that DCI schedules a plurality of PDSCHs. As shown in Figure 17, a) corresponds to scheduling two PDSCHs with different time domains, and the two PDSCHs are in different BWPs of different carriers / cells, and only one PDSCH is scheduled in the same BWP of the same carrier / cell. The PDSCHs are indexed according to the order of the time domain. b) corresponds to scheduling two PDSCHs with different frequency domains, and the two PDSCHs are in different BWPs of different carriers / cells, and only one PDSCH is scheduled in the same BWP of the same carrier / cell. The PDSCHs are indexed according to the order of the frequency domain. c) corresponds to scheduling four PDSCHs, and two PDSCHs are scheduled in different BWPs of different carriers / cells respectively, and two PDSCHs are scheduled in the same BWP of the same carrier / cell. The PDSCHs are indexed according to the order of the frequency domain first and then the time domain. d) corresponds to scheduling four PDSCHs, and two PDSCHs are scheduled in different BWPs of different carriers / cells respectively, and two PDSCHs are scheduled in the same BWP of the same carrier / cell. The PDSCHs are indexed according to the order of the time domain first and then the frequency domain. Hereinafter, an explanation will be given by taking as an example the fact that DCI can schedule a plurality of PDSCHs in the time domain.

[0047] Hereinafter, an explanation will be given by taking as an example the fact that DCI can schedule a plurality of PDSCHs in the time domain.

[0048] In some embodiments, to support that DCI can schedule a plurality of PDSCHs in the time domain, the PDSCH time domain resource allocation table used by the DCI supports scheduling a plurality of PDSCHs by one DCI. For the convenience of explanation, hereinafter, a further explanation will be given about the setting of the PDSCH time domain resource allocation first.

[0049] In some embodiments, a PDSCH TDRA table for supporting scheduling multiple PDSCHs by one DCI includes at least one PDSCH TDRA setting for supporting scheduling multiple PDSCHs by one DCI. Also, the table may or may not include a PDSCH TDRA setting for supporting scheduling one PDSCH by one DCI. For example, the PDSCH TDRA table includes at least one (M) PDSCH TDRA settings (at least one row), and among the M PDSCH TDRA settings, there are at least one (P) PDSCH TDRA settings for supporting scheduling multiple PDSCHs by one DCI, and M - P PDSCH TDRA settings for supporting scheduling one PDSCH by one DCI are included. Among them, M is greater than or equal to P, and both M and P are integers greater than or equal to 1.

[0050] In some embodiments, a PDSCH TDRA setting for supporting scheduling multiple PDSCHs by one DCI includes at least two PDSCH time domain resource settings (for example, at least two SLIVs, and each SLIV corresponds to one PDSCH).

[0051] In some embodiments, a PDSCH TDRA setting for supporting scheduling one PDSCH by one DCI includes only one PDSCH time domain resource setting.

[0052] In some embodiments, the method may further include the following (not shown), that is, the terminal device determines the first allocation table by determining the PDSCH time domain resource allocation table used by each DCI based on the first table, and one column of the first table corresponds to the first indication information (e.g., pdsch-TimeDomainAllocationListForMultiPDSCH) for setting the PDSCH TDRA table for supporting scheduling a plurality of PDSCHs by one DCI as described above. The first indication information is included in, for example, PDSCH-Config. That is, the terminal device determines the PDSCH time domain resource allocation table used by each DCI from the PDSCH time domain resource allocation (TDRA) table predefined or set by upper layer signaling based on the first table.

[0053] For example, the first table is used to determine the PDSCH time domain resource allocation table used by a DCI with a format of DCI format 1_1 or DCI format 1_2, and is not used to determine the PDSCH time domain resource allocation table used by a DCI with a format of DCI format 1_0. For example, for a DCI with a format of DCI format 1_0, the second table can be used to determine the PDSCH TDRA table used by the DCI, and the content included in the second table is, for example, the same as the existing table (Applicable PDSCH time domain resource allocation for DCI formats 1_0 and 1_1) for DCI format 1_0 and DCI format 1_1. That is, the PDSCH TDRA tables used by DCIs with formats of DCI format 1_0 and DCI format 1_1 are determined based on different tables.

[0054] For example, the differences between the first table and the second table are as follows. That is, the first table further includes one column, and this column corresponds to the first indication information (e.g., pdsch-TimeDomainAllocationListForMultiPDSCH) for setting a PDSCH TDRA table for supporting scheduling multiple PDSCHs by one DCI. In contrast, the second table does not include a column corresponding to the first indication information for setting a PDSCH TDRA table for supporting scheduling multiple PDSCHs by one DCI. In other words, when determining the PDSCH TDRA table used by the DCI, the second table does not consider the first indication information for setting a PDSCH TDRA table for supporting scheduling multiple PDSCHs by one DCI. Therefore, the PDSCH time domain resource allocation table used by the DCI determined based on the second table cannot be a PDSCH time domain resource allocation table for supporting scheduling multiple PDSCHs by one DCI, while the PDSCH time domain resource allocation table used by the DCI determined based on the first table can be a PDSCH time domain resource allocation table for supporting scheduling multiple PDSCHs by one DCI.

[0055] In some embodiments, the format of the DCI is DCI format 1_1 or DCI format 1_2, and the PDSCH TDRA table used by the DCI is independent of the radio network temporary identifier (RNTI) of the cyclic redundancy check (CRC) that scrambles the DCI. For example, when the RNTI is a cell radio network temporary identifier (Cell-RadioNetworkTemporaryIdentifier, C-RNTI), a coded modulation scheme C-RNTI (MCS-C-RNTI), or a configured scheduling RNTI (CS-RNTI), the PDSCH TDRA table used by the DCI is the same. Table 1 below is an example of the first table. The columns PDSCH-ConfigCommon includes pdsch-TimeDomainAllocationList and PDSCH-Config includes pdsch-TimeDomainAllocationList in Table 1 respectively correspond to the second indication information (i.e., pdsch-TimeDomainAllocationList in PDSCH-ConfigCommon and pdsch-TimeDomainAllocationList in PDSCH-Config) for setting cell-specific and UE-specific PDSCH TDRA tables for supporting only scheduling one PDSCH by one DCI. For the specific meaning, reference can be made to the prior art, and the detailed description thereof is omitted here.Among them, for the transmission of DCI in a common search space not associated with CORESET 0 (or it can be said that the associated CORESET is not the common search space of CORESET 0) or a UE-dedicated search space, when a PDSCH TDRA table is set to support scheduling a plurality of PDSCHs by one DCI (in other words, when PDSCH-Config contains first indication information (pdsch-TimeDomainAllocationListForMultiPDSCH) for setting the PDSCH TDRA table), when the DCI is scrambled using C-RNTI, MCS-C-RNTI or CS-RNTI, all use the PDSCH TDRA table for supporting scheduling a plurality of PDSCHs by one DCI.

[0056]

Table 1

[0057] For example, when the DCI is scrambled by a non-CS-RNTI (C-RNTI or MCS-C-RNTI), the PDSCH time domain resource allocation table used by the DCI is a PDSCH time domain resource allocation table for supporting scheduling of multiple PDSCHs by one DCI. When the DCI is scrambled by a CS-RNTI, the PDSCH time domain resource allocation table used by the DCI is not a PDSCH time domain resource allocation table for supporting scheduling of multiple PDSCHs by one DCI. In other words, when the DCI is scrambled by a CS-RNTI, the PDSCH time domain resource allocation table used by the DCI is a PDSCH TDRA table that only supports scheduling of one PDSCH by one DCI.

[0058] Alternatively, it can be said as follows. That is, when the DCI is scrambled by a CS-RNTI, the PDSCH time domain resource allocation table used by the DCI is not the PDSCH time domain resource allocation table set by the first indication information. When the DCI is scrambled by a non-CS-RNTI (C-RNTI or MCS-C-RNTI), the PDSCH time domain resource allocation table used by the DCI is the PDSCH time domain resource allocation table set by the first indication information. Since the DCI for activating SPS must be scrambled by a CS-RNTI, even if the first indication information sets a PDSCH TDRA table for supporting scheduling of multiple PDSCHs by one DCI, it cannot be used for activating SPS.

[0059] Tables 2 and 3 below are examples of the first table. The differences from Table 1 are as follows. That is, the PDSCH time domain resource allocation table used when scrambled by CS-RNTI is different from the PDSCH time domain resource allocation table used when scrambled by non-CS-RNTI (C-RNTI or MCS-C-RNTI). Also, in Table 2, the first indication information needs to support both scheduling one PDSCH by one DCI and scheduling multiple PDSCHs by one DCI simultaneously. Even if a PDSCH TDRA table is set to support scheduling multiple PDSCHs by one DCI according to the first indication information, the DCI with RNTI being CS-RNTI can use the PDSCH TDRA table that only supports scheduling one PDSCH by one DCI. In Table 3, the first indication information sets a PDSCH TDRA table that does not need to support both scheduling one PDSCH by one DCI and scheduling multiple PDSCHs by one DCI simultaneously. Although a PDSCH TDRA table is set to support scheduling multiple PDSCHs by one DCI according to the first indication information, when a PDSCH TDRA table that only supports scheduling one PDSCH by one DCI is not set according to the first indication information, the DCI format 1_1 with RNTI being CS-RNTI can use a predefined PDSCH TDRA table.

[0060]

Table 2

[0061]

Table 3

[0062] For example, when the DCI is used to activate the SPS and / or retransmit the SPS, the PDSCH time domain resource allocation table used by the DCI is not for supporting scheduling of multiple PDSCHs by one DCI. In other words, when the DCI is used to activate the SPS and / or retransmit the SPS, the PDSCH time domain resource allocation table used by the DCI is a PDSCH TDRA table that only supports scheduling of one PDSCH by one DCI. When the DCI is used for other purposes than activating the SPS and / or retransmitting the SPS, the PDSCH time domain resource allocation table used by the DCI is for supporting scheduling of multiple PDSCHs by one DCI.

[0063] Alternatively, it can also be said as follows: that is, when the DCI is used to activate the SPS and / or retransmit the SPS, the PDSCH time domain resource allocation table used by the DCI is not the PDSCH time domain resource allocation table set by the first indication information. When the DCI is used for other purposes than activating the SPS and / or retransmitting the SPS, the PDSCH time domain resource allocation table used by the DCI is the PDSCH time domain resource allocation table set by the first RRC signaling.

[0064] As described above, in Tables 1, 2, and 3, the first indication information sets a PDSCH TDRA table for supporting scheduling multiple PDSCHs by one DCI, that is, the value of pdsch-TimeDomainAllocationListForMultiPDSCH is YES, and the first indication information sets a PDSCH TDRA table for not supporting scheduling multiple PDSCHs by one DCI, that is, the value of pdsch-TimeDomainAllocationListForMultiPDSCH is NO.

[0065] In some embodiments, the first table may be used to determine a PDSCH time domain resource allocation table used by a DCI with a format of DCI format 1_1, and may also be used to determine a PDSCH time domain resource allocation table used by a DCI with a format of DCI format 1_0. For example, the table in the foregoing example may be regarded as a combination of a third table and an existing second table and used as the first table, and may also be used to determine a PDSCH time domain resource allocation table used by DCIs with formats of DCI format 1_1 and DCI format 1_0.

[0066] In some embodiments, the DCI includes a second information field, which may be a time domain resource assignment. The first information field indicates the PDSCH time domain resources by indicating an index (a row index, e.g., the value of the row index is 1 or more) corresponding to the PDSCH TDRA setting in the PDSCH TDRA table used by the DCI. In other words, the DCI schedules the PDSCH by indicating the PDSCH TDRA setting in the PDSCH TDRA table it uses. For example, the value m (where m is an integer greater than or equal to 0) of the second information field of the DCI correspondingly indicates the PDSCH TDRA setting with an index of m + 1 (i.e., the (m + 1)-th row) in the PDSCH TDRA table used by the DCI. When the PDSCH TDRA table is set by the first indication information, for example, the index value corresponding to the (m + 1)-th PDSCH TDRA setting set by the first indication information is m + 1. In other words, when the value of the second information field is m, the corresponding one is the (m + 1)-th PDSCH TDRA setting set by the first RRC signaling.

[0067] In some embodiments, at 201, when the PDSCH TDRA setting indicated by the DCI (e.g., the second information field in the DCI) is a PDSCH TDRA setting (including multiple PDSCH time domain resource settings) for supporting scheduling multiple PDSCHs by one DCI, the UE can determine the time domain resources of the multiple PDSCHs to be scheduled based on the PDSCH time domain resource settings corresponding to each of the multiple PDSCHs included in the PDSCH TDRA setting.

[0068] In some embodiments, the DCI may further include a third information field, which is used to indicate a HARQ process identifier. Among them, different scheduled PDSCHs may correspond to the same or different HARQ processes, and the terminal device can determine the HARQ process indicated by the DCI based on the DCI, and can determine the HARQ process of the scheduled PDSCH.

[0069] In some embodiments, the third information field is, for example, 'HARQ process number'.

[0070] In some embodiments, the DCI explicitly and / or implicitly indicates a HARQ process. For example, the DCI adopts (explicitly) the first information field, and / or reuses (explicitly) other information fields, and / or indicates the HARQ process (implicitly) by using the time domain and / or frequency domain resources for transmitting the DCI.

[0071] In some embodiments, the terminal device may further receive indication information related to enabling and / or disabling HARQ feedback (HARQ-ACK feedback enabling and / or disabling). The indication information may be carried (indicated or set) by upper layer signaling and / or physical layer signaling. The upper layer signaling includes radio resource control (RRC) signaling and / or medium access control layer control element (MAC CE), etc. The physical layer signaling may be different from the DCI in operation 201, or may be the DCI in operation 202. The indication information includes a bitmap and / or first HARQ process indication information and / or second HARQ process indication information and / or enabling / disabling indication information. That is, each piece of information in the above indication information may all be carried by one of the above-mentioned signaling, or may be carried by different ones of the above-mentioned signaling respectively. Embodiments of the present invention are not limited thereto.

[0072] In some embodiments, the indication information is for one cell or a plurality of cells. When there are a plurality of cells, the settings for enabling and / or disabling HARQ feedback for different cells may be the same or different. For example, when a plurality of cells (CA / DC) are set, the indication information indicates, for each of the different cells, the enabling and / or disabling of HARQ feedback.

[0073] In some embodiments, the indication information may include a bitmap, and each bit of the bitmap corresponds to one (or a set of) configured or pre-configured HARQ processes (IDs). The value of each bit indicates the enabling or disabling of the corresponding HARQ process (set). In other words, the bitmap has a one-to-one correspondence with the HARQ process (set). For example, when the value of one bit in the bitmap is 0, the HARQ process (set) is a HARQ process (set) for which feedback is disabled (hereinafter abbreviated as the first HARQ process). When the value of one bit in the bitmap is 1, the HARQ process (set) is a HARQ process (set) for which feedback is enabled, and vice versa.

[0074] For example, the HARQ process (set) corresponding to the bitmap may be all HARQ processes (sets) that are pre-defined or pre-configured or configured by signaling, or may be some of the HARQ processes (sets) among all HARQ processes (sets) that are pre-defined or pre-configured or configured by signaling. The some HARQ processes (sets) may be pre-defined or may be indicated by first HARQ process indication information further included in the indication information, which will be described later. Among them, when all HARQ processes (sets) are configured by signaling, the method may further include the following (not shown), that is, the terminal device receives HARQ process (set) configuration information for configuring all the HARQ processes (sets).

[0075] In some embodiments, the indication information may include second HARQ process indication information. The HARQ process(es) indicated by the second HARQ process indication information may have valid HARQ feedback or may have invalid HARQ feedback. The correspondence between the second HARQ process indication information and the HARQ process(es) it indicates is predefined. For example, the second HARQ process indication information may be an index and / or start location and length indication (index / SLIV). The HARQ process(es) corresponding to the value of the index / SLIV have valid HARQ feedback, and other HARQ process(es) that do not correspond to the value of the index / SLIV have invalid HARQ feedback. Or, the HARQ process(es) corresponding to the value of the index / SLIV have invalid HARQ feedback, and other HARQ process(es) that do not correspond to the value of the index / SLIV have valid HARQ feedback. Alternatively, the second HARQ process indication information may be further indicated in combination with activation / deactivation indication information. The activation / deactivation indication information is used to indicate whether the HARQ process indicated by the second HARQ process indication information has valid HARQ feedback or invalid HARQ feedback. The activation / deactivation indication information may be included in the indication information or may be included in the DCI in operation 201. Embodiments of the present invention are not limited thereto. For example, when indicated as activated by the activation / deactivation indication information, the HARQ process indicated by the second HARQ process indication information has valid HARQ feedback. When indicated as deactivated by the activation / deactivation indication information, the HARQ process indicated by the second HARQ process indication information has invalid HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa. Enumeration here is omitted for brevity.For example, the HARQ process(es) having a corresponding relationship with the second HARQ process indication information may be all HARQ process(es) predefined, preconfigured, or configured by signaling, or may be a part of all HARQ process(es) predefined, preconfigured, or configured by signaling. The part of the HARQ process(es) may be predefined or may be indicated by the first HARQ process indication information further included in the indication information. The first HARQ process indication information will be described later. The remaining part of the HARQ process(es) having no corresponding relationship with the second HARQ process indication information may be predefined by default or may be preconfigured as having valid or invalid HARQ feedback. Among them, when all HARQ process(es) are configured by signaling, the method may further include the following (not shown), that is, the terminal device receives HARQ process(es) configuration information for configuring all the HARQ process(es).

[0076] In some embodiments, the indication information may include first HARQ process indication information, and the HARQ process(es) indicated by the first HARQ process indication information has / have valid HARQ-ACK feedback or has / have invalid HARQ-ACK feedback.

[0077] For example, the first HARQ process indication information may be one HARQ process identifier (ID). The HARQ process identifier is the maximum value X of the identifiers of HARQ processes for which HARQ feedback is valid or invalid. In other words, all HARQ processes with HARQ process identifiers from 0 to X are HARQ processes for which HARQ feedback is valid or invalid. Or, the HARQ process identifier is the minimum value Y of the identifiers of HARQ processes for which HARQ feedback is valid or invalid. In other words, all HARQ processes with HARQ process identifiers from Y to Z - 1 are HARQ processes for which HARQ feedback is valid or invalid. Z may be the number of HARQ processes set in advance or predefined or set by signaling. The embodiments of the present invention are not limited thereto. Alternatively, the first HARQ process indication information may be further combined with activation / deactivation indication information for indication. The activation / deactivation indication information is used to indicate whether the HARQ processes indicated by the first HARQ process indication information (for example, with IDs from 0 to X or Y to Z - 1) are those for which HARQ feedback is valid or invalid. The activation / deactivation indication information may be included in the indication information or may be included in the DCI in operation 201. The embodiments of the present invention are not limited thereto. For example, when indicated as activated by the activation / deactivation indication information, the HARQ processes corresponding to the HARQ process identifiers indicated by the first HARQ process indication information (for example, with IDs from 0 to X or Y to Z - 1) are those for which HARQ feedback is valid. When indicated as deactivated by the activation / deactivation indication information, the HARQ processes corresponding to the HARQ process identifiers indicated by the first HARQ process indication information (for example, with IDs from 0 to X or Y to Z - 1) are those for which HARQ feedback is invalid. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback. The reverse is also true. Enumeration here is omitted for brevity.

[0078] For example, the first HARQ process indication information may be one HARQ process identifier (ID). The first HARQ process indication information may jointly indicate with the aforementioned bitmap or the second HARQ process indication information. For example, the first HARQ process indication information can indicate some of the aforementioned HARQ processes. For example, it can indicate the maximum value X or the minimum value of the identifiers of some of the HARQ processes. After determining some HARQ processes based on the first HARQ process indication information, based on each bit of the bitmap, it is indicated whether each HARQ process of some of the HARQ processes is one with valid or invalid HARQ feedback. Or, after determining a HARQ process having a correspondence relationship with the second HARQ process indication information based on the first HARQ process indication information, it is determined whether the HARQ process having the correspondence relationship is one with invalid or valid HARQ feedback. Alternatively, the first HARQ process indication information jointly indicates with the aforementioned second HARQ process indication information and activation / invalidation indication information. After determining a HARQ process having a correspondence relationship with the second HARQ process indication information based on the first HARQ process indication information, based on the activation / invalidation indication information, it is determined whether the HARQ process having the correspondence relationship is one with invalid or valid HARQ feedback. The activation / invalidation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates the invalidation of HARQ feedback. When the value of the bit is 1, it indicates the activation of HARQ feedback, and vice versa. Here, an exhaustive enumeration is omitted.

[0079] For example, the first HARQ process indication information may be a set of HARQ process identifiers (IDs). All HARQ processes corresponding to the set of HARQ process identifiers indicated by the first HARQ process indication information are those with valid HARQ feedback, or all are those with invalid HARQ feedback. Other HARQ processes not corresponding to the set of HARQ process identifiers are, by default, those with valid or invalid HARQ feedback.

[0080] For example, the first HARQ process indication information may be a set of HARQ process identifiers (IDs), and the first HARQ process indication information can be used in combination with activation / deactivation indication information to give an indication. The activation / deactivation indication information is used to indicate whether each HARQ process corresponding to a set of HARQ process identifiers indicated by the first HARQ process indication information is valid or invalid for HARQ feedback. The activation / deactivation indication information may be included in the indication information, or may be included in the DCI in operation 201, and the embodiments of the present invention are not limited thereto. For example, when indicated as activated by the activation / deactivation indication information, all HARQ processes corresponding to a set of HARQ process identifiers indicated by the first HARQ process indication information are those with valid HARQ feedback; when indicated as deactivated by the activation / deactivation indication information, all HARQ processes corresponding to a set of HARQ process identifiers indicated by the second HARQ process indication information are those with invalid HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback; when the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa, and an exhaustive enumeration is omitted here.

[0081] For example, the first HARQ process indication information can further perform a joint indication with the aforementioned second HARQ process indication information and activation / deactivation indication information. For example, the first HARQ process indication information can indicate a HARQ process having a corresponding relationship with the aforementioned second HARQ process indication information. Based on the first HARQ process indication information, after determining a HARQ process having a corresponding relationship with the second HARQ process indication information (the HARQ process corresponding to a set of HARQ process identifiers), based on the activation / deactivation indication information, it is determined whether the corresponding HARQ process is one with invalid or valid HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa. Here, an exhaustive enumeration is omitted.

[0082] In the above content, the HARQ process corresponding to one HARQ process identifier refers to the fact that the identifier of the HARQ process is the one HARQ process identifier.

[0083] For example, the first HARQ process indication information may be one second offset value offset, and the second offset value offset may be an offset value of the HARQ process identifier. For example, the HARQ process identifier corresponding to the second offset value is the maximum value X of the identifiers of the HARQ processes for which HARQ feedback is valid or invalid. In other words, all HARQ processes with HARQ process identifiers from 0 to X are HARQ processes for which HARQ feedback is valid or invalid. Or, the HARQ process identifier corresponding to the second offset value is the minimum value Y of the identifiers of the HARQ processes for which HARQ feedback is valid or invalid. In other words, all HARQ processes with HARQ process identifiers from Y to Z - 1 corresponding to the second offset value are HARQ processes for which HARQ feedback is valid or invalid. The Z may be the number of HARQ processes preset, predefined, or set by signaling, and the embodiments of the present invention are not limited thereto. Alternatively, the first HARQ process indication information can further be used in combination with activation / deactivation indication information for indication. The activation / deactivation indication information is used to indicate whether the HARQ processes corresponding to the second offset value indicated by the first HARQ process indication information (for example, with IDs from 0 to X or Y - Z - 1) are those for which HARQ feedback is valid or invalid. The activation / deactivation indication information may be included in the indication information, or may be included in the DCI in operation 201, and the embodiments of the present invention are not limited thereto.For example, according to the activation / deactivation indication information, when it is indicated to be activated, the HARQ process corresponding to the HARQ process identifier corresponding to the second offset value indicated by the first HARQ process indication information (for example, the ID is 0 to X or Y - Z - 1) has valid HARQ feedback. When it is indicated to be deactivated according to the activation / deactivation indication information, the HARQ process corresponding to the HARQ process identifier corresponding to the second offset value indicated by the first HARQ process indication information (for example, the ID is 0 to X or Y - Z - 1) has invalid HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa. Here, an exhaustive enumeration is omitted.

[0084] For example, the first HARQ process indication information may be one second offset value offset. The first HARQ process indication information jointly indicates with the aforementioned bitmap or the second HARQ process indication information. For example, the first HARQ process indication information can indicate some of the aforementioned HARQ processes by the second offset value. For example, it indicates the maximum value or the minimum value of the identifiers of some of the HARQ processes (corresponding to the maximum second offset value and the minimum second offset value respectively). After determining some of the HARQ processes based on the first HARQ process indication information, based on each bit of the bitmap, it indicates whether each HARQ process of some of the HARQ processes is effective or ineffective in HARQ feedback. Or, after determining the HARQ processes having a correspondence with the second HARQ process indication information based on the first HARQ process indication information, it determines whether the HARQ processes having a correspondence are ineffective or effective in HARQ feedback. Alternatively, the first HARQ process indication information jointly indicates with the aforementioned second HARQ process indication information and the activation / deactivation indication information. After determining the HARQ processes having a correspondence with the second HARQ process indication information based on the first HARQ process indication information, based on the activation / deactivation indication information, it determines whether the HARQ processes having a correspondence are ineffective or effective in HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates the deactivation of HARQ feedback. When the value of the bit is 1, it indicates the activation of HARQ feedback, and vice versa. Here, an exhaustive enumeration is omitted.

[0085] For example, the first HARQ process indication information may be a set of second offset values. All the HARQ processes corresponding to the HARQ process identifiers corresponding to the set of second offset values indicated by the first HARQ process indication information are effective or ineffective in HARQ feedback. Other HARQ processes not corresponding to the set of second offset values are, by default, effective or ineffective in HARQ feedback.

[0086] For example, the first HARQ process indication information may be a set of second offset values. The first HARQ process indication information can be used in combination with activation / deactivation indication information to give an indication. The activation / deactivation indication information is used to indicate whether the HARQ feedback for each HARQ process corresponding to a set of second offset values indicated by the first HARQ process indication information is valid or invalid. The activation / deactivation indication information may be included in the indication information, or may be included in the DCI in operation 201. Embodiments of the present invention are not limited thereto. For example, when indicated as activated by the activation / deactivation indication information, all HARQ processes corresponding to a set of second offset values indicated by the first HARQ process indication information have valid HARQ feedback. When indicated as deactivated by the activation / deactivation indication information, all HARQ processes corresponding to a set of second offset values indicated by the second HARQ process indication information have invalid HARQ feedback. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa. Enumeration in detail is omitted here.

[0087] For example, the first HARQ process indication information can further perform a joint indication with the aforementioned second HARQ process indication information and activation / deactivation indication information. For example, the first HARQ process indication information can indicate a HARQ process having a corresponding relationship with the aforementioned second HARQ process indication information. After determining a HARQ process (a HARQ process corresponding to a set of second offset values) having a corresponding relationship with the second HARQ process indication information based on the first HARQ process indication information, it is determined whether the HARQ process having a corresponding relationship is invalid or valid for HARQ feedback based on the activation / deactivation indication information. The activation / deactivation indication information may be 1-bit indication information. When the value of the bit is 0, it indicates deactivation of HARQ feedback. When the value of the bit is 1, it indicates activation of HARQ feedback, and vice versa. Enumeration in detail is omitted here.

[0088] For example, each piece of information in the indication information is conveyed by upper layer signaling as described above, or when the indication information includes a bitmap and / or first HARQ process indication information and / or second HARQ process indication information, the indication information is conveyed by the upper layer signaling as described above, and the aforementioned activation / deactivation indication information is conveyed by DCI in operation 201 (for example, the activation / deactivation indication information is conveyed by the fourth information field), or when the indication information includes activation / deactivation indication information, the indication information may be conveyed by DCI in operation 201. The embodiments of the present invention are not limited thereto.

[0089] In some embodiments, the terminal device can determine, based on the indication information and the DCI, whether the HARQ processes corresponding to one or more PDSCHs scheduled by the DCI are those with HARQ feedback being invalid or valid. For example, based on the indication information and / or the activation / deactivation indication information carried by the DCI, determine the HARQ processes indicated by the DCI, and then determine whether the indicated HARQ processes are those with feedback being valid or invalid. After that, determine the HARQ processes corresponding to the PDSCH scheduled by the DCI, and then determine whether the HARQ processes corresponding to the scheduled PDSCH are those with feedback being valid or invalid. Among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid.

[0090] In some embodiments, the method may further include the following (not shown), that is, the terminal device receives one or more PDSCHs. For example, the terminal device can receive PDSCHs from slot n - N + 1 to slot n. At 202, use the uplink resource (PUCCH or PUSCH) at slot n + k1 to transmit the HARQ feedback information about one or more PDSCHSs. The value of k1 may be indicated by the DCI or may be indicated by upper layer signaling. The meaning and indication method of k1 can be determined according to the prior art. The HARQ feedback information is included in the HARQ-ACK codebook. In other words, when receiving a plurality of DCIs, the time domain positions (for example, slot n + k1) of the HARQ-ACK feedback of the plurality of DCIs (or it can also be said as the PDSCHs scheduled by the plurality of DCIs) are the same.

[0091] In some embodiments, the HARQ-ACK codebook may be a semi-static codebook. For the size and generation method of the semi-static codebook, reference can be made to the prior art, and the detailed description thereof is omitted herein. The semi-static codebook includes at least HARQ feedback information for one or more PDSCHs. Hereinafter, only how to determine the HARQ feedback information of the one or more PDSCHs in different scenarios will be described.

[0092] Note that in the embodiments of the present invention, the PDSCH scheduled by DCI may refer to the PDSCH (configured PDSCH) corresponding to the PDSCH TDRA setting indicated by the DCI, or may refer to the PDSCH actually scheduled by the DCI (actual PDSCH), and the present invention is not limited thereto. For example, the actual PDSCH may be a configured PDSCH that satisfies the first condition, or the actual PDSCH may be equivalent to the configured PDSCH. In some embodiments, the above-mentioned first condition may be a condition related to the semi-statically configured transmission direction (or information for semi-statically configuring the transmission direction) and / or the configured PRACH resource and / or information for dynamically scheduling uplink transmission and / or information for dynamically setting the transmission direction. For example, the actual PDSCH may be a configured PDSCH that does not include symbols with a semi-statically configured transmission direction of uplink, or it may be said that the actual PDSCH may be a configured PDSCH having a corresponding HARQ process. Here, an exhaustive enumeration is omitted. In other words, in the embodiments of the present invention, "PDSCH scheduled by DCI" is interchangeable with "configured PDSCH scheduled by DCI", "PDSCH actually scheduled by DCI", "actual PDSCH scheduled by DCI", and "actual PDSCH among the PDSCHs scheduled by DCI". "HARQ feedback information" is interchangeable with "HARQ-ACK information".

[0093] In some embodiments, when SPS is not set or not activated in the terminal device, or when considering regardless of whether SPS is set or activated in the terminal device, if the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with disabled feedback, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH. That the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH may mean ignoring the decoding result of the second PDSCH and setting the HARQ feedback information corresponding to the second PDSCH as NACK. In other words, even if the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is still set as NACK. Among them, there may be one or more second PDSCHs, and since the HARQ process corresponding to the second PDSCH has disabled feedback, the terminal device does not have to transmit the HARQ feedback information about the second PDSCH corresponding to the HARQ process. At this time, without considering the actual decoding result of the second PDSCH, the HARQ feedback information corresponding to the second PDSCH may be directly set as NACK.

[0094] In some embodiments, when SPS is not set or not activated in the terminal device, or when considering whether SPS is set or activated in the terminal device or not, if the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process for which feedback is enabled, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH. Among them, there may be one or more first PDSCHs, and since the HARQ process corresponding to the first PDSCH has feedback enabled, the terminal device needs to transmit HARQ feedback information about the first PDSCH corresponding to the HARQ process. At this time, it is necessary to consider the actual decoding result of the first PDSCH. When decoding is successful (receiving is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when decoding fails (receiving fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0095] In some embodiments, when SPS is further set or activated in the terminal device, and the HARQ process corresponding to the SPS PDSCH (SPS PDSCH) has HARQ feedback disabled, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH may be the same or different. The HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH (when decoding is successful (receiving is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when decoding fails (receiving fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK). Among them, the HARQ process corresponding to the SPS PDSCH can be determined by the following formula (1) or (2).

[0096] HARQ Process ID = [floor(CURRENT_slot × 10 / (numberOfSlotsPerFrame × periodicity))] modulo nrofHARQ - Processes Formula (1) HARQ Process ID = [floor(CURRENT_slot × 10 / (numberOfSlotsPerFrame × periodicity))] modulo nrofHARQ - Processes + harq - ProcID - Offset Formula (2) Among them, CURRENT_slot is equal to [(SFN × numberOfSlotsPerFrame) + slot number in the frame], where numberOfSlotsPerFrame is the number of slots included in one system frame, nrofHARQ - Processes is the number of HARQ processes, harq - ProcID - Offset is the HARQ process identifier offset (for example, the offset for HARQ process identifier 0), and is included in the SPS configuration information SPS - Config. When harq - ProcID - Offset is not set, the HARQ process identifier associated with the start slot of downlink transmission may be determined by formula (1), and when harq - ProcID - Offset is set, the HARQ process identifier associated with the start slot of downlink transmission may be determined by formula (2). Also, when DCI for activating SPS schedules multiple PDSCHs, the HARQ process identifier of the SPS PDSCH is further related to the number of PDSCHs scheduled by the DCI and / or the sequence numbers of the PDSCH time - domain resources in at least two PDSCH time - domain resources scheduled by the DCI. Specifically, reference can be made to the prior art, and the detailed description is omitted here. Also, when supporting the setting of enabling or disabling the feedback of the HARQ process, it is further necessary to determine the HARQ process corresponding to the SPS PDSCH based on the enabling or disabling of the feedback of the HARQ process. For example, all HARQ processes corresponding to HARQ process identifiers within the range of 0 to harq - ProcID - Offset are either all with HARQ feedback enabled or all with HARQ feedback disabled. Here, an exhaustive enumeration is omitted.

[0097] For example, the same determination method for the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, that is, ignoring the decoding result of the SPS PDSCH, setting the HARQ feedback information corresponding to the SPS PDSCH as NACK, and the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, that is, ignoring the decoding result of the second PDSCH, setting the HARQ feedback information corresponding to the second PDSCH as NACK. In other words, even if the decoding of the second PDSCH and the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH and the SPS PDSCH is still set as NACK. Alternatively, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH. That is, when the decoding of the SPS PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the SPS PDSCH as ACK, when the decoding of the SPS PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the SPS PDSCH as NACK, when the decoding of the second PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the second PDSCH as ACK, and when the decoding of the second PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the second PDSCH as NACK.

[0098] For example, the difference in the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, that is, ignoring the decoding result of the second PDSCH and setting the HARQ feedback information corresponding to the second PDSCH as NACK (even if the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is still set as NACK), that is, when the decoding of the SPS PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the SPS PDSCH as ACK, and when the decoding of the SPS PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the SPS PDSCH as NACK, but the HARQ feedback information corresponding to the second PDSCH is always NACK, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, that is, ignoring the decoding result of the SPS PDSCH and setting the HARQ feedback information corresponding to the SPS PDSCH as NACK (even if the decoding of the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the SPS PDSCH is still NACK), and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH, that is, when the decoding of the second PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the second PDSCH as ACK, and when the decoding of the second PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the second PDSCH as NACK, but the HARQ feedback information corresponding to the SPS PDSCH is always NACK.

[0099] In some embodiments, the PDSCH corresponding to the HARQ process with effective feedback is referred to as the first PDSCH, and the PDSCH corresponding to the HARQ process with ineffective feedback is referred to as the second PDSCH. The first PDSCH and / or the second PDSCH may be the above-mentioned configured PDSCH or the actual PDSCH. Alternatively, it can also be said as follows, that is, the first PDSCH and / or the second PDSCH has a corresponding HARQ process. In 201, the at least one DCI includes a first DCI and / or a second DCI and / or a third DCI. The first DCI schedules a plurality of PDSCHs, and the plurality of PDSCHs includes at least one first PDSCH and at least one second PDSCH. The second DCI schedules (or can schedule) a plurality of PDSCHs, and all of the plurality of PDSCHs are second PDSCHs, or the second DCI schedules (or can schedule) only one PDSCH, and the one PDSCH is a second PDSCH. The third DCI schedules (or can schedule) a plurality of PDSCHs, and all of the plurality of PDSCHs are first PDSCHs, or the third DCI schedules (or can schedule) only one PDSCH, and the one PDSCH is a first PDSCH.

[0100] In some embodiments, in 201, the terminal device can receive only one or more first DCIs, or can receive only one or more second DCIs, or can receive only one or more third DCIs. Alternatively, in addition to receiving at least one first DCI or at least one second DCI, it further receives at least one third DCI. Hereinafter, how to determine the HARQ feedback information of the one or more PDSCHs when different DCIs are received will be described respectively.

[0101] (1) When SPS is not configured or not activated in the terminal device In some embodiments, when only at least one of the first DCIs is received, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH (ignoring the actual decoding result of the second PDSCH), the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH.

[0102] For example, when the HARQ feedback information corresponding to the second PDSCH is NACK and the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0103] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK, when the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK, when the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0104] In the above embodiments, receiving only at least one first DCI means the following, that is, within a predetermined period before the feedback time domain position corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI (for example, slot n + k), the terminal device has not received any other second DCI and / or third DCI corresponding to this time domain position (for example, slot n + k), or, in other words, within a predetermined period before the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI, the second DCI and / or third DCI have been received, but the slot position corresponding to the HARQ feedback timing corresponding to the second DCI and / or third DCI is different from the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI. In this case as well, it means that only at least one first DCI has been received. Also, when multiple first DCIs are received, the feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by the multiple first DCIs (or, it may also be said as the time domain position of the corresponding HARQ-ACK information feedback) is the same.

[0105] In some embodiments, when only at least one of the second DCIs is received, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is irrelevant to the decoding result of the PDSCH scheduled by the second DCI (ignoring the actual decoding result of the second PDSCH).

[0106] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK. When the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK. Alternatively, the decoding result of the second PDSCH scheduled by the second DCI is ignored, and the HARQ feedback information corresponding to the second PDSCH is set to NACK.

[0107] In the above embodiments, receiving only at least one second DCI refers to the following, that is, within a predetermined period before the feedback time domain position corresponding to the HARQ feedback timing (the aforementioned k) of the second DCI (for example, slot n + k), the terminal device has not received other first DCIs and / or third DCIs corresponding to this time domain position (for example, slot n + k). Or, it can also be said as follows, that is, within a predetermined period before the time domain position corresponding to the HARQ feedback timing (the aforementioned k) of the second DCI, the first DCI and / or third DCI are received, but the slot position corresponding to the HARQ feedback timing of the first DCI and / or third DCI is different from the time domain position corresponding to the HARQ feedback timing (the aforementioned k) of the second DCI (for example, slot n + k). In this case, it also means that only at least one second DCI is received. Also, when multiple second DCIs are received, the feedback time domain positions of the HARQ feedback information corresponding to the PDSCHs scheduled by the multiple second DCIs (or it can also be said as the time domain positions of the corresponding HARQ-ACK information feedback) are the same.

[0108] In some embodiments, when only at least one of the third DCIs is received, the HARQ feedback information corresponding to the PDSCH scheduled by the third DCI is related to the decoding result of the PDSCH scheduled by the third DCI.

[0109] For example, when the decoding of the first PDSCH scheduled by the third DCI is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0110] In the above embodiments, receiving only at least one third DCI means the following, that is, within a predetermined period before the feedback time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the third DCI, the terminal device has not received other first DCIs and / or second DCIs corresponding to this time domain position (for example, slot n + k), or, in other words, although the first DCI and / or second DCI have been received within a predetermined period before the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the third DCI, the slot position corresponding to the HARQ feedback timing corresponding to the first DCI and / or second DCI is different from the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the third DCI. In this case, it also means that only at least one third DCI has been received. Also, when multiple third DCIs are received, the feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by the multiple third DCIs (or, it may also be said as the time domain position of the corresponding HARQ-ACK information feedback) is the same.

[0111] In some embodiments, when receiving at least one of the first DCI and / or at least one of the second DCI, and further receiving at least one of the third DCI, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH (ignoring the actual decoding result of the second PDSCH), the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0112] For example, when the HARQ feedback information corresponding to the second PDSCH is NACK and the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0113] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK, when the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK, when the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0114] In the above embodiments, within a predetermined period before the feedback time domain position corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI and / or the second DCI (for example, slot n + k), the terminal device has further received a third DCI corresponding to the time domain position (for example, slot n + k), or, in other words, within a predetermined period before the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI and / or the second DCI, the terminal device has received a third DCI, and the slot position corresponding to the HARQ feedback timing corresponding to the third DCI is the same as the time domain position (for example, slot n + k) corresponding to the HARQ feedback timing (the aforementioned k) corresponding to the first DCI or the second DCI. Also, at least one first DCI and / or at least one second DCI is the same as the feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by at least one third DCI (or it may be said as the time domain position of the corresponding HARQ-ACK information feedback).

[0115] (2) When SPS is set or activated in the terminal device In some embodiments, when SPS is set or activated in the terminal device, and the HARQ feedback of the HARQ - ACK process corresponding to the PDSCH of the SPS (SPS PDSCH) is disabled, and only at least one of the first DCIs is received or only at least one of the third DCIs is received, or when SPS is set or activated in the terminal device, and the HARQ feedback of the HARQ - ACK process corresponding to the SPS PDSCH is disabled, and at least one of the first DCIs is received and / or at least one of the second DCIs is received, and further at least one of the third DCIs is received, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH.

[0116] For example, the HARQ feedback information corresponding to the second PDSCH and the feedback information corresponding to the SPS PDSCH are NACKs (ignoring the actual decoding results of the second PDSCH and the SPS PDSCH). When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0117] Alternatively, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH.

[0118] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK; when the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK; when the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK; when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK; when the decoding of the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the SPS PDSCH is set to ACK; when the decoding of the SPS PDSCH fails (the reception fails), the HARQ feedback information corresponding to the SPS PDSCH is set to NACK.

[0119] Alternatively, the determination methods of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH are different. The HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH. The HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH.

[0120] For example, the feedback information corresponding to the SPS PDSCH is NACK (ignoring the actual decoding result of the SPS PDSCH). When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK. When the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK. When the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK. When the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK.

[0121] Alternatively, the determination methods of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH are different. The HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH. The HARQ feedback information corresponding to the second PDSCH is not related to the decoding result of the second PDSCH. The HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH.

[0122] For example, the feedback information corresponding to the second PDSCH is NACK (ignoring the actual decoding result of the second PDSCH). When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK. When the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK. When the decoding of the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the SPS PDSCH is set to ACK. When the decoding of the SPS PDSCH fails (the reception fails), the HARQ feedback information corresponding to the SPS PDSCH is set to NACK.

[0123] In some embodiments, SPS is set or activated in the terminal device, and the HARQ feedback of the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS is invalidated, and when only at least one of the second DCIs is received, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI.

[0124] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK, and when the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK. When the decoding of the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the SPS PDSCH is set to ACK, and when the decoding of the SPS PDSCH fails (the reception fails), the HARQ feedback information corresponding to the SPS PDSCH is set to NACK.

[0125] Alternatively, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same, the HARQ feedback information corresponding to the SPS PDSCH is not related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is not related to the decoding result of the second PDSCH.

[0126] For example, ignore the decoding results of the second PDSCH scheduled by the second DCI and the SPS PDSCH, and set all the HARQ feedback information corresponding to the second PDSCH and the HARQ feedback information corresponding to the SPS PDSCH to NACK.

[0127] In some embodiments, when SPS is set or activated in the terminal device, and the HARQ feedback of the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS is enabled, and only at least one of the first DCI is received or only at least one of the second DCI is received or only at least one of the third DCI is received, or when SPS is set or activated in the terminal device, and the HARQ feedback of the HARQ-ACK process corresponding to the SPS PDSCH is enabled, and at least one of the first DCI is received and / or at least one of the second DCI is received, and further at least one of the third DCI is received, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH.

[0128] For example, ignoring the decoding results of the second PDSCH scheduled by the second DCI and the SPS PDSCH, setting all the HARQ feedback information corresponding to the second PDSCH and the HARQ feedback information corresponding to the SPS PDSCH as NACK, when the decoding of the first PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the first PDSCH as ACK, and when the decoding of the first PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the first PDSCH as NACK.

[0129] Alternatively, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same. The HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH.

[0130] For example, when the decoding of the second PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the second PDSCH is set to ACK. When the decoding of the second PDSCH fails (the reception fails), the HARQ feedback information corresponding to the second PDSCH is set to NACK. When the decoding of the SPS PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the SPS PDSCH is set to ACK. When the decoding of the SPS PDSCH fails (the reception fails), the HARQ feedback information corresponding to the SPS PDSCH is set to NACK. When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK. When the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0131] In the above (ii), among the first DCI and / or the second DCI and / or the third DCI, and the first DCI and / or the second DCI and / or the third DCI correspond to the feedback time domain position corresponding to the HARQ feedback timing (the aforementioned k) of the SPS PDSCH (or it can also be said to be the time domain position of the corresponding HARQ-ACK information feedback). The meaning of only receiving the first DCI and / or only receiving the second DCI and / or only receiving the third DCI is described in the above (i), and the detailed description is omitted here.

[0132] Note that the above-mentioned Figure 2 is for illustrative explanation of the embodiments of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation can be appropriately adjusted, or several operations can be increased or decreased. Those skilled in the art can make appropriate modifications based on the above description of Figure 2 without being limited thereto.

[0133] The above-mentioned embodiments are for illustrative explanation of the embodiments of the present invention, but the present invention is not limited to these, and furthermore, appropriate modifications can also be made based on the above-mentioned embodiments. For example, each of the above-mentioned embodiments can be used alone, or a combination of a plurality of the above-mentioned embodiments can be used.

[0134] As can be seen from the above-mentioned embodiments, when the HARQ mechanism such as activation / invalidation of HARQ feedback can be supported, HARQ feedback information can be transmitted, so that the overhead of uplink control signaling can be reduced. In addition, since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0135] <Embodiment of the second aspect> Figure 3 is a diagram showing an information feedback method in an embodiment of the present invention, which is applied to the terminal device side. As shown in Figure 3, the method includes the following steps.

[0136] 301: The terminal device receives a fourth downlink control information (DCI), and the fourth DCI includes cumulative downlink assignment indicator (C-DAI) information and / or total DAI (total downlink assignment indicator, C-DAI) information; and 302: The terminal device determines HARQ feedback information based on the cumulative DAI information and / or the total DAI information.

[0137] In some embodiments, the fourth DCI can be used to schedule PDSC, and the PDSCH scheduled by the DCI includes PDSCHs corresponding to HARQ processes with HARQ feedback enabled or disabled. The fourth DCI can schedule one or more PDSCHs. The DCI schedules one PDSCH, and the PDSCH time domain resource allocation table used by the DCI supports only scheduling one PDSCH by one DCI, or the DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the DCI supports scheduling multiple PDSCHs by one DCI. For specific implementation manners, reference can be made to the embodiments of the first aspect, and detailed description thereof is omitted here. It should be noted that the embodiments of the present invention are not limited thereto. For example, the fourth DCI may further be used to schedule PUSCH (one or more PUSCHs), or the fourth DCI does not schedule data transmission, and exhaustive enumeration is omitted here. The format of the fourth DCI may be 1_0 or 1_1, and specifically, reference can be made to the prior art.

[0138] In some embodiments, the fourth DCI includes C-DAI and / or T-DAI. In the conventional method, C-DAI represents the number of releases of PDSCH or SPS PDSCH associated with DCI format 1_1 / 1_0 that is cumulatively received and is represented by a {serving cell, PDCCH monitoring / control timing} pair. The counting order of the cumulative number follows the ascending order of the serving cell index first and then the ascending order of the PDCCH monitoring / control timing index. The T-DAI value represents the total number of {serving cell, PDCCH monitoring / control timing} pairs. The T-DAI for all serving cells with the same PDCCH monitoring / control timing is the same, and T-DAI is updated by the PDCCH monitoring / control timing index. FIG. 4 is a diagram showing C-DAI and T-DAI according to the conventional method. As shown in FIG. 4, in the first PDCCH monitoring / control timing, the DCI received at serving cells 1 and 3 includes C-DAI and T-DAI, and the DCI received at serving cell 2 includes C-DAI. Among them, the value of T-DAI is 3, and the C-DAI at each serving cell is arranged in ascending order of the serving cell index. In the second PDCCH monitoring / control timing, the DCI received at serving cell 1 includes C-DAI and T-DAI, and the DCI received at serving cell 3 includes C-DAI. Among them, the value of T-DAI is 5, and the C-DAI at serving cells 1 and 3 is arranged in ascending order of the serving cell index. In other words, in the conventional method, when counting C-DAI and T-DAI, it does not consider whether to support the indication or setting of enabling or disabling the feedback of the HARQ process, or, to put it another way, it does not consider whether the PDSCH scheduled by the DCI includes the PDSCH corresponding to the HARQ process for which the feedback is disabled or enabled.

[0139] In order to support the instruction or setting for enabling or disabling the feedback of the HARQ process, in embodiments of the present invention, a method for counting and tallying C-DAI and T-DAI different from the conventional method has been proposed. When counting C-DAI and T-DAI, it is necessary to consider whether the PDSCH scheduled by DCI includes the PDSCH corresponding to the HARQ process for which the feedback is disabled or enabled. The cumulative DAI information and / or the total DAI information perform counting with DCI as the granularity for the DCI for scheduling the PDSCH, and / or perform counting with the PDSCH as the granularity. Hereinafter, the method for counting and tallying C-DAI and T-DAI respectively and how to determine the HARQ feedback information based on the cumulative DAI information and / or the total DAI information under each method will be described.

[0140] (1) Counting with DCI as the granularity In some embodiments, the DCI that may participate in the counting may include the actually received DCI for scheduling the PDSCH, may include the DCI with detection missed (not received) (used or not used for scheduling the PDSCH), may include the DCI for activating SPS, and may include the DCI of the PDSCH that actually collides (competes) with the uplink. However, the DCI that may participate in the counting needs to include at least one DCI having the corresponding HARQ process. Hereinafter, for the convenience of explanation, in each exemplary figure, the PDSCH scheduled by DCI refers to the PDSCH having the corresponding HARQ process, and this explanation can also be applied to (2) described later in the same manner.

[0141] FIGS. 28A to 28C are diagrams showing C-DAI and T-DAI that count DCI as a granularity. As shown in FIGS. 28A to 28C, the uplink resource (time domain position) for transmitting HARQ feedback information corresponding to the PDSCH scheduled by DCI is the same. As shown in FIG. 28A, C-DAI and T-DAI count the actually received DCI as a granularity. As shown in FIG. 28B, the difference from FIG. 28A is that DCI with detection leakage (not received) (used or not used for scheduling the PDSCH) also participates in the counting. As shown in FIG. 28C, DCI of at least one PDSCH with uplink collision also participates in the counting.

[0142] In some embodiments, among the DCI that can participate in the counting, the C-DAI and / or T-DAI only count DCI that includes at least one PDSCH corresponding to a HARQ process with valid feedback for the PDSCH scheduled by the DCI for scheduling the PDSCH. The C-DAI and / or T-DAI do not count DCI that only includes a PDSCH corresponding to a HARQ process with invalid feedback for the scheduled PDSCH. Note that the aforementioned DCI refers to general DCI and does not specifically refer to the fourth DCI in 301.

[0143] For example, for the fourth DCI for scheduling the PDSCH, the PDSCH scheduled by the fourth DCI includes at least one first PDSCH corresponding to a HARQ process with valid feedback and at least one second PDSCH corresponding to a HARQ process with invalid feedback. The C-DAI and / or T-DAI count the fourth DCI, or it can be said that the fourth DCI is included in the counting. The meaning represented by the C-DAI and / or T-DAI in the fourth DCI is the same as before, and the detailed description thereof is omitted here.

[0144] FIG. 5 is a diagram showing C-DAI and T-DAI that count DCI as a granularity. As shown in FIG. 5, the differences from FIG. 4 are as follows. The PDSCH scheduled by the DCI received by serving cell 1 at the first PDCCH monitoring / control timing includes one second PDSCH, but the PDSCH scheduled by the DCI further includes three first PDSCHs. Therefore, the DCI is also counted by C-DAI and / or T-DAI. That is, at the first PDCCH monitoring / control timing, the DCI received at serving cells 1 and 3 includes C-DAI and T-DAI, and the DCI received at serving cell 2 includes C-DAI. Among them, the value of T-DAI is 3, and the C-DAI at each serving cell is arranged in ascending order of the serving cell index. At the second PDCCH monitoring / control timing, the DCI received at serving cell 1 includes C-DAI and T-DAI, and the DCI received at serving cell 3 includes C-DAI. Among them, the value of T-DAI is 5, and the C-DAI at serving cells 1 and 3 is arranged in ascending order of the serving cell index.

[0145] In the above embodiments, the terminal device determining the HARQ feedback information based on the cumulative DAI information and / or the total DAI information includes the following, that is, among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process for which feedback is valid is related to the decoding result of the first PDSCH. Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which feedback is invalid is not related to the decoding result of the second PDSCH, that is, ignoring the actual decoding result of the second PDSCH, setting the HARQ feedback information corresponding to the second PDSCH as NACK. When the decoding of the first PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the first PDSCH as ACK, and when the decoding of the first PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the first PDSCH as NACK.

[0146] Alternatively, among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process for which feedback is valid is related to the decoding result of the first PDSCH. Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which feedback is invalid is related to the decoding result of the second PDSCH, that is, when the decoding of the first PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the first PDSCH as ACK, and when the decoding of the first PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the first PDSCH as NACK. When the decoding of the second PDSCH is successful (the reception is successful), setting the HARQ feedback information corresponding to the second PDSCH as ACK, and when the decoding of the second PDSCH fails (the reception fails), setting the HARQ feedback information corresponding to the second PDSCH as NACK.

[0147] For example, for the fourth DCI used to schedule the PDSCH, all the PDSCHs scheduled by the fourth DCI are the first PDSCHs, and the C-DAI and / or T-DAI count the fourth DCI, or when counting, it can be said that the fourth DCI is included in the count. The meanings represented by the C-DAI and / or T-DAI in the fourth DCI are the same as those in the prior art, and the detailed description thereof is omitted here. As shown in FIG. 4, among the PDSCHs scheduled by the DCI received by each serving cell at each PDCCH monitoring / control timing, only one or more first PDSCHs are included and no second PDSCH is included. Therefore, each DCI is counted by the C-DAI and / or T-DAI. That is, at the first PDCCH monitoring / control timing, the DCI received by serving cells 1 and 3 includes the C-DAI and T-DAI, the DCI received by serving cell 2 includes the C-DAI, among which the value of the T-DAI is 3, and the C-DAI at each serving cell is arranged in ascending order of the serving cell index. At the second PDCCH monitoring / control timing, the DCI received by serving cell 1 includes the C-DAI and T-DAI, the DCI received by serving cell 3 includes the C-DAI, among which the value of the T-DAI is 5, and the C-DAI at serving cells 1 and 3 is arranged in ascending order of the serving cell index.

[0148] In the above embodiment, the terminal device determining the HARQ feedback information based on the cumulative DAI information and / or the total DAI information includes the following. The HARQ feedback information corresponding to the first PDSCH scheduled by the fourth DCI is related to the decoding result of the first PDSCH. When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK. When the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK.

[0149] For example, for the fourth DCI for scheduling PDSCH, all the PDSCHs scheduled by the fourth DCI are the second PDSCHs, and the C-DAI and / or T-DAI do not count the fourth DCI, or it can be said that the fourth DCI is not included when counting. For the C-DAI and / or T-DAI in the fourth DCI, it may be the cumulative number of received DCIs (where at least one first PDSCH is included in the PDSCH scheduled by the DCI). For example, the C-DAI and / or T-DAI may be equal to the total number of DCIs received in each serving cell at each monitoring / control timing up to the PDCCH monitoring / control timing of receiving the fourth DCI (where at least one first PDSCH is included in the PDSCH scheduled by the DCI).

[0150] Figure 6 is a diagram showing C-DAI and T-DAI that count using DCI as the granularity. As shown in Figure 6, the differences from Figure 4 are as follows: The PDSCH scheduled by the DCI received by serving cell 1 at the first PDCCH monitoring / control timing only includes the second PDSCH and does not include the first PDSCH. Therefore, the DCI is not counted by the C-DAI and / or T-DAI. That is, at the first PDCCH monitoring / control timing, the DCIs received by serving cells 2 and 3 include C-DAI and T-DAI. Among them, the value of T-DAI is 2, and the C-DAI in each serving cell is arranged in ascending order of the serving cell index. At the second PDCCH monitoring / control timing, the DCIs received by serving cells 1 and 3 include C-DAI and T-DAI. Among them, the value of T-DAI is 4, and the C-DAI in serving cells 1 and 3 is arranged in ascending order of the serving cell index.

[0151] FIG. 7 is a diagram showing C-DAI and T-DAI that count DCI as a granularity. As shown in FIG. 7, in the DCI received by serving cell 1 at the first PDCCH monitoring / control timing, the PDSCH scheduled by the DCI includes only the second PDSCH and does not include the first PDSCH. Therefore, the DCI is not counted by C-DAI and / or T-DAI. The difference from FIG. 6 is as follows: that is, the DCI (the fourth DCI) may include T-DAI, and T-DAI may be equal to the total number 2 of DCIs received by each serving cell at the first PDCCH monitoring / control timing (the PDSCH scheduled by the DCI includes at least one first PDSCH).

[0152] FIG. 8 is a diagram showing C-DAI and T-DAI that count DCI as a granularity. As shown in FIG. 8, in the DCI received by serving cell 1 at the first PDCCH monitoring / control timing, the PDSCH scheduled by the DCI includes only the second PDSCH and does not include the first PDSCH. Therefore, the DCI is not counted by C-DAI and / or T-DAI. The difference from FIG. 7 is as follows: that is, the DCI (the fourth DCI) may further include C-DAI. C-DAI may be equal to the total number 2 of DCIs received by each serving cell at the first PDCCH monitoring / control timing (the PDSCH scheduled by the DCI includes at least one first PDSCH).

[0153] In the above embodiment, since all that is scheduled by the fourth DCI is the second PDSCH, it is not necessary to generate HARQ feedback information for the second PDSCH.

[0154] Note that FIGS. 5 to 8 described above explain how to count DCI as a granularity only in combination with the scenario in FIG. 28A. However, FIGS. 5 to 8 can also be combined with the scenarios in FIGS. 28B to 28C, and the detailed description thereof is omitted here.

[0155] In the above embodiments, after the terminal device receives a plurality of DCIs, after determining the HARQ feedback information of the PDSCH scheduled by each DCI using one of the same methods as the PDSCH scheduled by the above-mentioned fourth DCI, a dynamic codebook can be generated. The dynamic codebook contains the HARQ feedback information of X PDSCHs, where X is equal to the T-DAI value in the last received DCI. The HARQ feedback information of the PDSCH scheduled by a certain DCI is arranged at the Y-th position of the dynamic codebook, where Y is equal to the value of C-DAI in the DCI. That is, the terminal device includes the HARQ feedback information in the codebook and transmits it at the time domain position for transmitting the determined HARQ feedback information, which will be described later. Also, when considering the SPS PDSCH or when supporting the codeblock group, the generation method of the dynamic codebook can refer to the prior art, and the detailed description thereof is omitted here.

[0156] (2) Counting with PDSCH as the granularity In some embodiments, the PDSCH that may participate in the counting may include the PDSCH actually received and scheduled by the DCI that schedules the PDSCH, the PDSCH scheduled by the DCI with detection leakage (not received) (used or not used for scheduling the PDSCH), and the other PDSCH that is not in conflict with the uplink and is scheduled by the DCI of the PDSCH in conflict with the uplink and actually received. However, the PDSCH scheduled by the DCI that may participate in the counting needs to have the corresponding HARQ process.

[0157] Figures 29A to 29C are diagrams showing C-DAI and T-DAI that count PDSCH as a granularity. As shown in Figures 29A to 29C, the uplink resource (time domain position) for transmitting HARQ feedback information corresponding to the PDSCH scheduled by DCI is the same. As shown in Figure 29A, C-DAI and T-DAI perform counting with the PDCCH scheduled by DCI that was actually received as a granularity. As shown in Figure 29B, the difference from Figure 29A is as follows: that is, PDSCHs scheduled by DCI with detection missed (not received) (used or not used for scheduling PDSCH) may also participate in the counting. As shown in Figure 29C, the difference from Figure 29A is as follows: that is, other PDSCHs scheduled by DCI that include at least one PDSCH colliding with the uplink may also participate in the counting.

[0158] Figures 30A to 30C are diagrams showing C-DAI and T-DAI that count PDSCH as a granularity. As shown in Figures 30A to 30C, the uplink resource (time domain position) for transmitting HARQ feedback information corresponding to the PDSCH scheduled by DCI is the same. The difference from Figures 29A to 29C is as follows: that is, when one DCI schedules multiple PDSCHs, the C-DAI in Figures 29A to 29C indicates the number corresponding to the last PDSCH scheduled by the DCI, while the C-DAI in Figures 30A to 30C indicates the number corresponding to the first PDSCH scheduled by the DCI. Hereinafter, the explanation will be made only by taking the case where C-DAI indicates the number corresponding to the last PDSCH scheduled by the DCI as an example.

[0159] In some embodiments, among the PDSCHs that can participate in the counting, the C-DAI and / or T-DAI only count the PDSCHs corresponding to the HARQ processes for which feedback is valid for the PDSCHs scheduled by DCI. The cumulative DAI information and / or the total DAI information do not count the PDSCHs corresponding to the HARQ processes for which feedback is invalid. It should be noted that the aforementioned DCI refers to the general DCI and does not specifically refer to the fourth DCI in 301. By counting with the PDSCH as the granularity, when feedback HARQ-ACK information using a dynamic codebook, the codebook size can be reduced and the resource overhead can be reduced.

[0160] For example, for the fourth DCI for scheduling the PDSCH, the PDSCH scheduled by the fourth DCI includes at least one first PDSCH corresponding to a HARQ process for which feedback is valid and at least one second PDSCH corresponding to a HARQ process for which feedback is invalid. The C-DAI and / or T-DAI count the first PDSCH scheduled by the fourth DCI, or it can be said that the first PDSCH scheduled by the fourth DCI is included in the counting. The C-DAI and / or T-DAI in the fourth DCI may be equal to the cumulative number of the first PDSCHs received in each serving cell at each monitoring and control timing up to the PDCCH monitoring and control timing of the reception of the fourth DCI.

[0161] FIG. 9 is a diagram showing C-DAI and T-DAI that count PDSCHs as granularities. As shown in FIG. 9, the PDSCH scheduled by the DCI received by serving cell 1 at the first PDCCH monitoring / control timing includes one second PDSCH, but the PDSCH scheduled by the DCI further includes three first PDSCHs. Therefore, only three first PDSCHs are counted in the fourth DCI by C-DAI and / or T-DAI. That is, at the first PDCCH monitoring / control timing, the DCI received by serving cells 1 and 3 includes C-DAI and T-DAI, and the DCI received by serving cell 2 includes C-DAI. Among them, the value of T-DAI is 6, and the C-DAI in each serving cell is arranged in ascending order of the serving cell index. At the second PDCCH monitoring / control timing, the DCI received by serving cell 1 includes C-DAI and T-DAI, and the DCI received by serving cell 3 includes C-DAI. Among them, the value of T-DAI is 9, and the C-DAI in serving cells 1 and 3 is arranged in ascending order of the serving cell index.

[0162] In the above embodiment, the step in which the terminal device determines the HARQ feedback information based on the cumulative DAI information and / or the total DAI information includes the following, that is, it is related to the decoding result of the first PDSCH scheduled by the fourth DCI. When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK, and when the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK. In other words, it is not necessary to generate the HARQ feedback information of the second PDSCH.

[0163] For example, for the fourth DCI used to schedule the PDSCH, all the PDSCHs scheduled by the fourth DCI are the first PDSCHs, and the C-DAI and / or T-DAI count each first PDSCH scheduled by the fourth DCI, or it can be said that when counting, each first PDSCH scheduled by the fourth DCI is included in the count. The C-DAI in the fourth DCI may be equal to the current cumulative number of the first PDSCHs scheduled up to the PDCCH monitoring and control timing of the reception of the fourth DCI, and the T-DAI in the fourth DCI may be equal to the total number of the first PDSCHs received on each serving cell at each monitoring and control timing up to the PDCCH monitoring and control timing of the reception of the fourth DCI.

[0164] FIG. 10 is a diagram showing the C-DAI and T-DAI that count using the PDSCH as the granularity. As shown in FIG. 10, since all the DCIs received on each serving cell corresponding to each monitoring and control timing schedule only the first PDSCHs, each first PDSCH is included in the count by the C-DAI and / or T-DAI. That is, at the first PDCCH monitoring and control timing, the DCIs received on serving cells 1 to 3 include the C-DAI and T-DAI. Among them, the value of the T-DAI is 7, and the values of the C-DAI are sequentially 5, 6, and 7. At the second PDCCH monitoring and control timing, the DCIs received on serving cells 1 and 3 include the C-DAI and T-DAI. Among them, the value of the T-DAI is 10, and the C-DAI values for serving cells 1 and 3 are sequentially 9 and 10.

[0165] In the above embodiments, the terminal device determining the HARQ feedback information based on the cumulative DAI information and / or the total DAI information includes the following, that is, it is related to the decoding result of the first PDSCH scheduled by the fourth DCI. When the decoding of the first PDSCH is successful (the reception is successful), the HARQ feedback information corresponding to the first PDSCH is set to ACK. When the decoding of the first PDSCH fails (the reception fails), the HARQ feedback information corresponding to the first PDSCH is set to NACK. In other words, since the second PDSCH is not included in the fourth DCI, there is no need to generate the HARQ feedback information for the second PDSCH.

[0166] For example, regarding the fourth DCI for scheduling the PDSCH, all the PDSCHs scheduled by the fourth DCI are second PDSCHs, and the C-DAI and / or T-DAI do not count all the second PDSCHs scheduled by the fourth DCI, or it can be said that when counting, all the second PDSCHs scheduled by the fourth DCI are not included. The C-DAI and / or T-DAI in the fourth DCI may be equal to the cumulative number of the first PDSCHs received on each serving cell at each monitoring and control timing up to the PDCCH monitoring and control timing of the reception of the fourth DCI.

[0167] FIG. 11 shows C-DAI and T-DAI that count using PDSCH as a granularity. As shown in FIG. 11, since the fourth DCI schedules only the second PDSCH, the second PDSCH scheduled by the fourth DCI is not counted by C-DAI and / or T-DAI. That is, at the first PDCCH monitoring / control timing, the DCI received on serving cells 2 to 3 includes C-DAI and T-DAI. Among them, the value of T-DAI is 3, and the values of C-DAI are sequentially 1 and 3. At the second PDCCH monitoring / control timing, the DCI received on serving cells 1 and 3 includes C-DAI and T-DAI. Among them, the value of T-DAI is 6, and the C-DAI on serving cells 1 and 3 are sequentially 5 and 6. At the first PDCCH monitoring / control timing, the T-DAI included in the DCI received on serving cell 1 is 2.

[0168] In the above embodiment, since all that is scheduled by the fourth DCI is the second PDSCH, it is not necessary to generate HARQ feedback information for the second PDSCH.

[0169] In the above embodiments, after the terminal device receives a plurality of DCIs, after determining the HARQ feedback information of the PDSCH scheduled by each DCI using one of the same methods as the PDSCH scheduled by the above-mentioned fourth DCI, a dynamic codebook can be generated. The dynamic codebook includes the HARQ feedback information of X PDSCHs, where X is equal to the T-DAI value in the last received DCI. The HARQ feedback information of the PDSCH scheduled by a certain DCI is arranged at the Y-th position of the dynamic codebook, where Y is equal to the C-DAI value in the DCI. That is, the terminal device includes the HARQ feedback information in the codebook and transmits it at the time domain position for transmitting the determined HARQ feedback information, which will be described later. Also, when considering the SPS PDSCH or when supporting the coded block group, the generation method of the dynamic codebook can refer to the prior art, and the detailed description thereof is omitted here.

[0170] In some embodiments, the methods in the above (1) and (2) may be executed alone or in combination, and the embodiments of the present invention are not limited thereto.

[0171] In some embodiments, when all the PDSCHs scheduled by the fourth DCI are second PDSCHs, the C-DAI and / or T-DAI in the fourth DCI are specific values.

[0172] For example, only the fourth DCI(s) for scheduling one or more PDSCHs corresponding to a HARQ process with disabled feedback is / are received, but when there is a DCI that has been missed (not received) (used or not used for scheduling a PDSCH), for example, determined based on C-DAI / T-DAI in the received DCI, HARQ feedback information also needs to be transmitted, and all the information bits included in the HARQ feedback information are NACKs. The C-DAI and / or T-DAI in the fourth DCI is / are set to a specific value, e.g., 0, and does not need to change based on the scheduling situation (does not need to change based on the number of other DCIs or the number of PDSCHs scheduled by other DCIs).

[0173] In some embodiments, the method may further include the following (not shown), that is, the terminal device receives one or more PDSCHs. For example, the terminal device can receive PDSCHs from slot n-N+1 to slot n. The method may further include the following (not shown), that is, the terminal device transmits the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the received PDSCH.

[0174] In some embodiments, the terminal device determines the time domain position for transmitting the HARQ feedback information based on the time domain position where the last PDSCH corresponding to a HARQ process with enabled HARQ feedback scheduled by the DCI is located.

[0175] For example, based on the time domain position where the last PDSCH corresponding to the HARQ process with HARQ feedback enabled, which is scheduled by the DCI, is located, and the HARQ feedback timing, the terminal device determines the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI. The HARQ feedback timing k indicates the time domain offset between the time domain position where the last PDSCH corresponding to the HARQ process with HARQ feedback enabled, which is scheduled by the DCI, is located, and the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI. For example, the time domain position may be a slot and / or a symbol. Thereby, the feedback latency can be further reduced.

[0176] FIGS. 12 and 13 are diagrams showing the time domain position for transmitting HARQ feedback information. As shown in FIGS. 12 and 13, the offset between the time domain position slot n + k and the time domain position slot n where the last PDSCH corresponding to the HARQ process with HARQ-ACK feedback enabled, which is scheduled by the DCI, is located is equal to the HARQ feedback timing k. The value of k may be indicated by the DCI or may be indicated by upper layer signaling.

[0177] For example, the fourth DCI includes a first information field, and the first information field is used to indicate the HARQ feedback timing. Alternatively, the method may further include the following (not shown), that is, the terminal device receives upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing k.

[0178] Note that for the method of transporting k, the prior art can be referred to, and the detailed description thereof is omitted herein. When a plurality of DCIs are received, the time domain positions of the HARQ-ACK feedback of the plurality of DCIs (or it can also be said as the PDSCH scheduled by the plurality of DCIs) are the same.

[0179] In some embodiments, for the method of determining whether the PDSCH scheduled by the DCI is the first PDSCH or the second PDSCH, the embodiments of the first aspect can be referred to, and the detailed description thereof is omitted herein.

[0180] As can be seen from the above embodiments, since HARQ feedback information can be transmitted when the HARQ mechanism such as activation / invalidation of HARQ feedback can be supported, the overhead of uplink control signaling can be reduced. Also, since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0181] <Embodiments of the third aspect> In the embodiments of the present invention, an information feedback method is provided and described from the perspective of the terminal device. Here, the description of the parts overlapping with the embodiments of the first or second aspect is omitted.

[0182] FIG. 14 is a diagram showing an information reception method in an embodiment of the present invention. As shown in FIG. 14, the method includes the following steps.

[0183] 1401: The terminal device receives a PDSCH, and the HARQ process corresponding to the PDSCH is one with invalid feedback; and 1402: The terminal device does not transmit a HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH.

[0184] In some embodiments, at 1401, the PDSCH may be a PDSCH among one or more PDSCHs scheduled by DCI, or may be an SPS PDSCH. When the PDSCH is a PDSCH among one or more PDSCHs scheduled by DCI, for example, the DCI schedules a plurality of PDSCHs, and the terminal device receives one or a part or all of the PDSCHs among the plurality of scheduled PDSCHs. In other words, a plurality of PDSCHs among the PDSCHs received at 1401 are scheduled by the same DCI, but the embodiments of the present invention are not limited thereto. The method for determining the PDSCH corresponding to the HARQ process with invalid feedback is the same as that of the first aspect, and the detailed description thereof is omitted here.

[0185] Therefore, when it is possible to support both the HARQ mechanism of enabling / disabling HARQ feedback and the scheduling method of scheduling a plurality of PDSCHs by one DCI at the same time, it may not be necessary to transmit HARQ feedback information. Therefore, by reducing the number of times the terminal device monitors the PDCCH, the complexity and power consumption of the terminal device for monitoring the PDCCH can be reduced, and by reducing the resource overhead for transmitting downlink control signaling (DCI), the data throughput can also be improved. Furthermore, the overhead of uplink control signaling can be reduced, and since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0186] In some embodiments, for the method of determining the time domain position, reference can be made to the embodiments of the first aspect or the second aspect. It should be noted that the time domain position only corresponds to the PDSCH, that is, there is no other downlink transmission corresponding to the time domain position before a predetermined time of the time domain position, that is, there is no downlink transmission for feedback of HARQ-ACK information (codebook) at the time domain position. For example, there is no other PDSCH corresponding to the time domain position before a predetermined time of the time domain position. In other words, there is no other PDSCH at the time domain position that needs to transmit HARQ feedback information (codebook) corresponding to other PDSCHs.

[0187] In some embodiments, the terminal device determines that the time domain position only corresponds to the PDSCH based on C-DAI and / or T-DAI in DCI, and / or the terminal device determines that the time domain position only corresponds to the PDSCH based on the configuration and / or active state of SPS.

[0188] For example, the terminal device determines that the time domain position corresponds only to the PDSCH based on the C-DAI and / or T-DAI in the DCI. In other words, based on the C-DAI and / or T-DAI in the DCI, each received DCI or the PDSCH scheduled by each DCI can be determined, whereby it is determined whether there is another downlink transmission (e.g., PDSCH) corresponding to the time domain position before a predetermined time of the time domain position, and it is determined whether the time domain position corresponds only to the PDSCH (when there is no downlink transmission corresponding to the time domain position before a predetermined time of the time domain position, it is determined that the time domain position corresponds only to the PDSCH). Similarly, the terminal device determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the C-DAI and / or T-DAI in the DCI. In other words, based on the C-DAI and / or T-DAI in the DCI, each received DCI or the PDSCH scheduled by each DCI can be determined, whereby it is determined whether there is another downlink transmission (e.g., PDSCH) corresponding to the time domain position before a predetermined time of the time domain position, it is determined whether the time domain position corresponds only to the PDSCH, and it is determined whether to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH (when the time domain position corresponds only to the PDSCH, it is determined not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH). The above-mentioned DCI may be the DCI that schedules the received PDSCH, but the embodiments of the present invention are not limited thereto. The above-mentioned DCI may further be a DCI received within a predetermined time before or after the DCI that schedules the received PDSCH.

[0189] In some embodiments, in the following cases 1)-3), the terminal device determines that it is necessary to transmit a HARQ feedback codebook (semi-static codebook or dynamic codebook) at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the C-DAI and / or T-DAI in the DCI. 1) It has received only one or more DCIs that schedule one or more PDSCHs corresponding to HARQ processes for which feedback is disabled, but there is a DCI (used or not used for scheduling the PDSCH) that has been undetected (not received) (e.g., determined based on the C-DAI / T-DAI in the received DCI).

[0190] 2) It has received only one DCI, the HARQ process corresponding to the PDSCH scheduled by the DCI has feedback disabled, the C-DAI of the DCI is not a first specific value, e.g., 1, and / or the T-DAI (e.g., included in the DCI) is not a second specific value, e.g., 1 (assuming the C-DAI is counted based on the DCI).

[0191] 3) It has received only one DCI, the HARQ process corresponding to the PDSCH scheduled by the DCI has feedback disabled, and the C-DAI of the DCI is not a first specific value, e.g., 1, or is the number of PDSCHs scheduled by the DCI, and / or the T-DAI (e.g., included in the DCI) is not a second specific value, e.g., 1, or is the number of PDSCHs scheduled by the DCI (assuming the DAI is counted based on the PDSCH).

[0192] In the above cases 1)-3), all the information bits of the feedback codebook are NACK, and the above DCI is a DCI that can schedule only one PDSCH or a DCI that can schedule multiple PDSCHs.

[0193] In FIGS. 15A to 15C, taking the example of receiving one DCI and the DCI scheduling one PDSCH, the C-DAI and T-DAI in the above cases 1)-3) are described. In FIGS. 31A to 31D, taking the example of receiving one DCI and the DCI scheduling a plurality of PDSCHs, the C-DAI and T-DAI in the above cases 1)-3) are described. In FIGS. 31A to 31D, the DAI is counted with the DCI as the granularity. In FIGS. 32A to 32D, taking the example of receiving one DCI and the DCI scheduling a plurality of PDSCHs, the C-DAI and T-DAI in the above cases 1)-3) are described. In FIGS. 32A to 32D, the DAI is counted with the PDCCH as the granularity. That is, in the scenarios of FIGS. 15A to 15C, FIGS. 31A to 31D, and FIGS. 32A to 32D, the terminal device determines that it is necessary to transmit the HARQ feedback codebook (semi-static codebook or dynamic codebook) at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the C-DAI and / or T-DAI in the DCI, but all the information bits of the feedback codebook are NACK.

[0194] In some embodiments, in addition to the case where the feedback for the HARQ process corresponding to the PDCCH is invalid, in the following cases 4)-6), the terminal device determines that it is not necessary to transmit the HARQ feedback codebook (semi-static codebook or dynamic codebook) at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the C-DAI and / or T-DAI in the DCI.

[0195] 4) Only receiving one or more DCIs that schedule the PDSCH corresponding to the HARQ process with invalid feedback, and there is no undetected (not received) DCI (for example, determined based on the C-DAI / T-DAI in the received DCI) that is (used or not used) for scheduling the PDSCH.

[0196] 5) Only one DCI is received, and the HARQ process corresponding to the PDSCH scheduled by the DCI has feedback disabled. The C-DAI of the DCI is a first specific value, e.g., 0 / 1, and / or the T-DAI (e.g., included in the DCI) is a second specific value, e.g., 0 / 1 (assuming that the C-DAI is counted based on the DCI). The DCI can be a DCI that schedules only one PDSCH or a DCI that schedules multiple PDSCHs.

[0197] 6) Only one DCI is received, and the HARQ process corresponding to the PDSCH scheduled by the DCI has feedback disabled, and the C-DAI of the DCI is a first specific value, e.g., 0 / 1 or the number of PDSCHs scheduled by the DCI, and / or the T-DAI (e.g., included in the DCI) is a second specific value, e.g., 0 / 1 or the number of PDSCHs scheduled by the DCI (assuming that the DAI is counted based on the PDSCH).

[0198] In FIGS. 33A to 33B, one DCI is received, and the case where the DCI schedules one PDSCH is taken as an example to explain the C-DAI and T-DAI in the above cases 4)-6). In FIGS. 34A to 34B, one DCI is received, and the case where the DCI schedules a plurality of PDSCHs is taken as an example to explain the C-DAI and T-DAI in the above cases 4)-6). In FIGS. 34A to 34D, the DAI is counted with the DCI as the granularity. In FIGS. 35A to 35D, one DCI is received, and the case where the DCI schedules a plurality of PDSCHs is taken as an example to explain the C-DAI and T-DAI in the above cases 4)-6). In FIGS. 35A to 35D, the DAI is counted with the PDCCH as the granularity. That is, in the scenarios of FIGS. 33A to 33B, FIGS. 34A to 34B, and FIGS. 35A to 35D, the terminal device determines that it is not necessary to transmit the HARQ feedback codebook (semi-static codebook or dynamic codebook) at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the C-DAI and / or T-DAI in the DCI.

[0199] For example, the terminal device determines, based on the SPS configuration and / or active state, that the time domain position corresponds only to the PDSCH. In other words, the SPS PDSCH can be determined based on the SPS configuration and / or active state, thereby determining whether there is another downlink transmission (e.g., SPS PDSCH) corresponding to the time domain position before a predetermined time of the time domain position, and determining whether the time domain position corresponds only to the PDSCH (when there is no downlink transmission corresponding to the time domain position before a predetermined time of the time domain position, it is determined that the time domain position corresponds only to the PDSCH). Similarly, the terminal device determines, based on the SPS configuration and / or active state, not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH. In other words, the SPS PDSCH can be determined based on the SPS configuration and / or active state, thereby determining whether there is another downlink transmission (e.g., SPS PDSCH) corresponding to the time domain position before a predetermined time of the time domain position, determining whether the time domain position corresponds only to the PDSCH, and determining whether to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH (when the time domain position corresponds only to the PDSCH, it is determined not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH).

[0200] In some embodiments, the time domain position for transmitting the HARQ feedback information corresponding to the PDSCH (e.g., slot n + k) may be determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI scheduling the PDSCH. Specifically, reference may be made to the embodiments of the first aspect or the second aspect, and the detailed description thereof is omitted here.

[0201] In some embodiments, at 1402, the HARQ feedback codebook may be for only the HARQ feedback information of the received PDSCH.

[0202] For example, when SPS is not configured or not activated in the terminal device, and the terminal device receives only at least one second DCI described in the first aspect, the PDSCH received at 1401 is a PDSCH among the PDSCHs scheduled by the DCI, and the HARQ processes corresponding to all the second PDSCHs scheduled by the second DCI are all feedback-invalidated. After that, when the terminal device receives one or more or all of the second PDSCHs (hereinafter collectively referred to as the received PDSCH), the generation of the feedback codebook (for example, a semi-static codebook) can be skipped (the feedback codebook is not generated), in other words, the HARQ feedback information (or the codebook) is not transmitted at the time-domain position for transmitting the HARQ feedback information corresponding to the received PDSCH. The PDSCHs scheduled by at least two second DCIs and the SPS PDSCH correspond to the same time-domain position for transmitting the HARQ feedback information.

[0203] For example, when the SPS PDSCH is configured or activated in the terminal device and the PDSCH received at 1401 is the SPS PDSCH, the terminal device can skip the generation of the feedback codebook (for example, a semi-static codebook) (the feedback codebook is not generated), in other words, the HARQ feedback information (or the codebook) for the SPS PDSCH is not transmitted at the time-domain position for transmitting the HARQ feedback information corresponding to the received SPS PDSCH.

[0204] For example, when SPS is configured or activated in the terminal device and the terminal device receives only at least one second DCI described in the first aspect, the PDSCH received at 1401 includes the PDSCH scheduled by the DCI and the SPS PDSCH. The terminal device can skip generating a feedback codebook (e.g., a semi-static codebook), that is, not generate the feedback codebook. In other words, the terminal device does not transmit HARQ feedback information (or a codebook) for the SPS PDSCH at the time domain position for transmitting HARQ feedback information corresponding to the received PDSCH scheduled by the DCI and the SPS PDSCH. Among them, the PDSCH scheduled by the DCI and the SPS PDSCH correspond to the same time domain position for transmitting HARQ feedback information.

[0205] For example, the difference from the embodiment of the second aspect is as follows. That is, when the terminal device receives only at least one fourth DCI described in the second aspect, the PDSCH received at 1401 is the PDSCH among the PDSCHs scheduled by the fourth DCI. The HARQ processes corresponding to all the second PDSCHs scheduled by the fourth DCI are all feedback-invalidated. After that, when the terminal device receives one or more or all of the PDSCHs among the second PDSCHs (hereinafter collectively referred to as the received PDSCHs), the C-DAI and / or T-DAI in the fourth DCI can be ignored.

[0206] As can be seen from the above embodiments, for the PDSCH corresponding to the HARQ process without feedback, it is not necessary to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH. Thus, when the HARQ mechanism of enabling / disabling HARQ feedback can be supported, it is not necessary to transmit HARQ feedback information, so that the overhead of uplink control signaling can be reduced. Also, since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0207] <Embodiment of the fourth aspect> In the embodiments of the present invention, an information feedback method is provided and described from the perspective of the terminal device. Here, the description of the overlapping parts with the embodiments of the second or third aspect is omitted.

[0208] FIG. 16 is a diagram showing an information reception method in an embodiment of the present invention. As shown in FIG. 16, the method includes the following steps.

[0209] 1601: The terminal device receives DCI for scheduling the PDSCH; 1602: The terminal device determines the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI based on the time domain position where the last PDSCH corresponding to the HARQ process with valid HARQ feedback scheduled by the DCI is located; and 1603: The terminal device transmits the HARQ feedback information about the PDSCH at the determined time domain position.

[0210] For the implementation manners of 1601 and 1603, reference can be made to the embodiments of the second aspect described above, and the detailed description thereof is omitted here.

[0211] In some embodiments, the terminal device determines the time domain position for transmitting the HARQ feedback information based on the time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located.

[0212] For example, the terminal device determines the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI based on the time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and the HARQ feedback timing. The HARQ feedback timing k indicates the time domain offset between the time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI. For example, the time domain position may be a slot and / or a symbol.

[0213] For example, the DCI includes a first information field, and the first information field is used to indicate the HARQ feedback timing, or the method further includes the following (not shown), that is, the terminal device receives upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing k.

[0214] Note that for the method of transporting k, reference can be made to the prior art, and the detailed description thereof is omitted here. When receiving a plurality of DCIs, the time domain positions of the HARQ-ACK feedbacks of the plurality of DCIs (or it can also be said as the PDSCHs scheduled by the plurality of DCIs) are the same (for example, slot n + k). Also, the above method is only applicable when a dynamic codebook is fed back to determine the time domain position of the HARQ feedback information, and it may not be applicable when a semi-static codebook is fed back to determine the time domain position of the HARQ feedback information. However, the embodiments of the present invention are not limited thereto.

[0215] According to the above embodiments, the feedback latency can be further reduced.

[0216] <Embodiment of the fifth aspect> In the embodiments of the present invention, an information receiving method is provided and described from the perspective of the network device side. Here, the description of the overlapping parts with the embodiments of the first aspect or the second aspect is omitted.

[0217] FIG. 17 is a diagram showing the information receiving method in the embodiments of the present invention. As shown in FIG. 17, the method includes the following steps.

[0218] 1701: The network device transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) to the terminal device. The DCI schedules one or more PDSCHs, and among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process for which HARQ feedback is valid or invalid; and 1702: The network device receives HARQ feedback information about one or more PDSCHSs transmitted by the terminal device.

[0219] In some embodiments, for the implementation manners of 1601 - 1602, reference can be made to 201 - 202 in the embodiments of the first aspect, and the detailed description thereof is omitted here.

[0220] FIG. 18 is a diagram showing an information reception method in an embodiment of the present invention. As shown in FIG. 18, the method includes the following steps.

[0221] 1801: The network device transmits a fourth DCI to the terminal device, and the fourth DCI includes cumulative DAI information and / or total DAI information; and 1802: The network device receives HARQ feedback information determined based on the cumulative DAI information and / or total DAI information transmitted by the terminal device.

[0222] In some embodiments, for the implementation manners of 1801-1802, reference can be made to 301-302 in the embodiments of the first aspect, and the detailed description thereof is omitted here.

[0223] Note that for the implementation manners of the above-mentioned DCI, cumulative DAI information and / or total DAI information, HARQ feedback information, and the fourth DCI, reference can be made to the foregoing embodiments and the embodiments of the corresponding seventh aspect, and the detailed description thereof is omitted here.

[0224] <Embodiments of the Sixth Aspect> In an embodiment of the present invention, an information feedback device is provided. The device may be, for example, a terminal device, or one or more components or assemblies arranged in the terminal device. Here, the description of the same content as in the embodiments of the first to fourth aspects is omitted.

[0225] FIG. 19 is a diagram showing an information feedback device in an embodiment of the present invention. As shown in FIG. 19, the information feedback device 1900 includes the following.

[0226] First receiving unit 1901: Receives at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), where the DCI schedules one or more PDSCHs, and among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and First transmitting unit 1902: Transmits HARQ feedback information about one or more PDSCHSs.

[0227] In some embodiments, when the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with invalid feedback, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0228] In some embodiments, the fact that the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK.

[0229] In some embodiments, when the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process with valid feedback, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH.

[0230] In some embodiments, when SPS is further set or activated in the terminal device and the HARQ feedback of the HARQ process corresponding to the PDSCH of SPS (SPS PDSCH) is invalidated, the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different.

[0231] In some embodiments, the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH being the same includes that the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0232] In some embodiments, the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH being different includes that the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0233] In some embodiments, the terminal device transmits the HARQ feedback information at a time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs.

[0234] In some embodiments, the feedback time domain positions of the HARQ feedback information corresponding to the PDSCHs scheduled by at least two DCIs are the same, or the feedback time domain positions of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH are the same.

[0235] In some embodiments, the first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process.

[0236] In some embodiments, the at least one DCI includes a first DCI and / or a second DCI and / or a third DCI. The first DCI schedules a plurality of PDSCHs, and the plurality of PDSCHs includes at least one first PDSCH corresponding to a HARQ process with valid feedback and at least one second PDSCH corresponding to a HARQ process with invalid feedback. The second DCI schedules a plurality of second PDSCHs, and all of the plurality of second PDSCHs correspond to a HARQ process with invalid HARQ feedback, or the second DCI schedules one second PDSCH, and the one second PDSCH corresponds to a HARQ process with invalid HARQ feedback. The third DCI schedules a plurality of first PDSCHs, and all of the plurality of first PDSCHs correspond to a HARQ process with valid HARQ feedback, or the third DCI schedules one first PDSCH, and the one first PDSCH corresponds to a HARQ process with valid HARQ feedback.

[0237] In some embodiments, when the first receiving unit receives only at least one of the first DCIs, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH.

[0238] In some embodiments, when the first receiving unit receives only at least one of the second DCIs, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is irrelevant to the decoding result of the PDSCH scheduled by the second DCI.

[0239] In some embodiments, when the first receiving unit receives only at least one of the third DCIs, the HARQ feedback information corresponding to the PDSCH scheduled by the third DCI is related to the decoding result of the PDSCH scheduled by the third DCI.

[0240] In some embodiments, when the first receiving unit receives at least one of the first DCIs and / or at least one of the second DCIs, and further receives at least one of the third DCIs, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0241] In some embodiments, when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback disabled, and the first receiving unit receives only at least one of the first DCIs, or only at least one of the third DCIs, or when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the SPS PDSCH has HARQ feedback disabled, and the first receiving unit receives at least one of the first DCIs and / or at least one of the second DCIs, and further receives at least one of the third DCIs, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH; or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH; or the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH; or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH.

[0242] In some embodiments, when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH of the SPS (SPS PDSCH) has HARQ feedback disabled, and the first receiving unit receives only at least one of the second DCIs, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is irrelevant to the decoding result of the second PDSCH.

[0243] In some embodiments, when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH of the SPS (SPS PDSCH) has HARQ feedback enabled, and the first receiving unit receives only at least one of the first DCIs or only at least one of the second DCIs or only at least one of the third DCIs, or when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the SPS PDSCH has HARQ feedback enabled, and the first receiving unit receives at least one of the first DCIs and / or at least one of the second DCIs, and further receives at least one of the third DCIs, The HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH.

[0244] In some embodiments, when the first receiving unit does not receive other DCIs corresponding to the time domain position within a predetermined period before the time domain position corresponding to the HARQ feedback timing corresponding to the DCI, it indicates that the terminal device has received only the DCI.

[0245] FIG. 20 is a diagram showing another information feedback device in an embodiment of the present invention. As shown in FIG. 20, the information feedback device 2000 includes the following.

[0246] A second receiving unit 2001: receives a fourth downlink control information (DCI), and the fourth DCI includes cumulative DAI information and / or total DAI information; and A first determining unit 2002: determines HARQ feedback information based on the cumulative DAI information and / or the total DAI information.

[0247] In some embodiments, the cumulative DAI information and / or the total DAI information perform counting with the DCI as a granularity and / or perform counting with the PDSCH as a granularity for the DCI for scheduling the PDSCH.

[0248] In some embodiments, for the DCI for scheduling the PDSCH, the cumulative DAI information and / or the total DAI information only count the DCI for which the scheduled PDSCH includes at least one PDSCH corresponding to a HARQ process with valid feedback.

[0249] In some embodiments, the cumulative DAI information and / or the total DAI information do not count a DCI that is a DCI for which the scheduled PDSCH includes only a PDSCH corresponding to a HARQ process with invalid feedback.

[0250] In some embodiments, the PDSCH scheduled by the fourth DCI includes a fourth PDSCH corresponding to a HARQ process with valid feedback and a second PDSCH corresponding to a HARQ process with invalid feedback, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0251] In some embodiments, the HARQ feedback information corresponding to the fourth PDSCH corresponding to a HARQ process with valid feedback for the PDSCH scheduled by the fourth DCI is related to the decoding result of the fourth PDSCH, and among the PDSCH scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback is unrelated or related to the decoding result of the second PDSCH.

[0252] In some embodiments, the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback among the PDSCH scheduled by the fourth DCI is unrelated to the decoding result of the second PDSCH includes the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback among the PDSCH scheduled by the fourth DCI is NACK.

[0253] In some embodiments, for the PDSCH scheduled by DCI, the cumulative DAI information and / or the total DAI information count only the PDSCH corresponding to the HARQ process for which feedback is valid.

[0254] In some embodiments, the cumulative DAI information and / or the total DAI information do not count the PDSCH corresponding to the HARQ process for which feedback is invalid.

[0255] In some embodiments, among the PDSCH scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process for which feedback is valid is related to the decoding result of the first PDSCH.

[0256] In some embodiments, the apparatus further includes the following.

[0257] A second transmission unit (not shown): Transmit the HARQ feedback information at a time domain position for transmitting the HARQ feedback information corresponding to the PDSCH.

[0258] In some embodiments, the apparatus further includes the following.

[0259] A second determination unit (not shown): Determine the time domain position for transmitting the HARQ feedback information based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located.

[0260] In some embodiments, the second determination unit determines the time domain position for transmitting the HARQ feedback information based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located and the HARQ feedback timing.

[0261] In some embodiments, the HARQ feedback timing indicates a time domain offset between the time domain position where the last PDSCH corresponding to a HARQ process for which HARQ feedback is valid is located and the time domain position for transmitting the HARQ feedback information, and the HARQ feedback timing is scheduled by the DCI.

[0262] In some embodiments, the fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the apparatus further includes the following.

[0263] A third receiving unit (not shown): receives upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0264] In some embodiments, the fourth DCI is used to schedule PDSCH and / or PUSCH.

[0265] In some embodiments, the fourth DCI is used to schedule PDSCH, and the PDSCH scheduled by the DCI includes PDSCH corresponding to a HARQ process for which HARQ feedback is valid or invalid.

[0266] In some embodiments, the fourth DCI does not schedule data transmission.

[0267] In some embodiments, the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling a plurality of PDSCHs by one DCI.

[0268] FIG. 21 is a diagram showing another information feedback apparatus according to an embodiment of the present invention. As shown in FIG. 21, the information feedback apparatus 2100 includes the following.

[0269] Fourth receiving unit 2101: receives DCI for scheduling PDSCH; Third determining unit 2102: determines a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located; and Second transmitting unit 2103: transmits HARQ feedback information of the PDSCH scheduled by the DCI at the determined time domain position.

[0270] In some embodiments, the third determining unit determines a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and HARQ feedback timing.

[0271] In some embodiments, the HARQ feedback timing indicates a time domain offset between a time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI.

[0272] In some embodiments, the DCI includes a first information field, and the first information field is used to indicate the HARQ feedback timing, or the apparatus further includes the following.

[0273] Fifth receiving unit (not shown): receives upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0274] FIG. 22 is a diagram showing another information feedback apparatus according to an embodiment of the present invention. As shown in FIG. 22, the information feedback apparatus 2200 includes the following.

[0275] Sixth receiving unit 2201: receives the PDSCH, and HARQ processes corresponding to the PDSCH have feedback disabled; and Processing unit 2202: does not transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH.

[0276] In some embodiments, the time domain position corresponds only to the PDSCH.

[0277] In some embodiments, the fact that the time domain position corresponds only to the PDSCH includes that there is no other downlink transmission corresponding to the time domain position before a predetermined time of the time domain position.

[0278] In some embodiments, the processing unit determines that the time domain position corresponds only to the PDSCH based on C-DAI and / or T-DAI in the DCI, and / or determines that the time domain position corresponds only to the PDSCH based on the SPS setting and / or active state.

[0279] In some embodiments, the processing unit determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on C-DAI and / or T-DAI in the DCI, and / or determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the SPS setting and / or active state.

[0280] In some embodiments, the processing unit does not generate the HARQ feedback codebook corresponding to the PDSCH.

[0281] In some embodiments, the PDSCH includes a PDSCH scheduled by DCI and / or an SPS PDSCH.

[0282] In some embodiments, a plurality of PDSCHs among the PDSCHs are scheduled by the same DCI.

[0283] Each of the above embodiments is for illustratively explaining the embodiments of the present invention, and the present invention is not limited thereto, and appropriate modifications may be further made based on each of the above embodiments. For example, each of the above embodiments may be used alone, or a plurality of the above embodiments may be combined and used.

[0284] It should be noted that only the components or modules related to the present invention have been described above, but the present invention is not limited thereto. The information feedback device 1900-2200 may further include other components or modules, and for the specific contents of these components or modules, reference may be made to related technologies.

[0285] For the sake of convenience, only the connection relationships or signal directions between components or modules are shown in FIGS. 19-22. However, as those skilled in the art can understand, various related technologies such as bus connections may be adopted. Each of the above components or modules may be implemented by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0286] As can be seen from the above embodiments, when the HARQ mechanism that can support the activation / invalidation of HARQ feedback is available, HARQ feedback information can be transmitted or not transmitted, so that the overhead of uplink control signaling can be reduced. In addition, since the network device can transmit new data without waiting for the report of HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0287] <Embodiment of the seventh aspect> In an embodiment of the present invention, an information receiving device is provided. The device may be, for example, a network device, or one or more components or assemblies installed in the network device. Here, the description of the same content as in the embodiment of the fifth aspect is omitted.

[0288] FIG. 23 is a diagram showing an information receiving device according to an embodiment of the present invention. As shown in FIG. 23, the information receiving device 2300 includes the following.

[0289] A third transmission unit 2301: transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) to a terminal device, and the DCI schedules one or more PDSCHs, among which the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and A seventh receiving unit 2302: receives HARQ feedback information about one or more PDSCHSs transmitted by the terminal device.

[0290] In some embodiments, when the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with disabled feedback, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0291] In some embodiments, the fact that the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK.

[0292] In some embodiments, when the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process with enabled feedback, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH.

[0293] In some embodiments, when SPS is further configured or activated in the terminal device and the HARQ process corresponding to the PDSCH of SPS (SPS PDSCH) has disabled HARQ feedback, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different.

[0294] In some embodiments, the manner of determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH being the same includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0295] In some embodiments, the manner of determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH being different includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0296] In some embodiments, the seventh receiving unit receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs.

[0297] In some embodiments, the feedback time domain positions of the HARQ feedback information corresponding to the PDSCHs scheduled by at least two DCIs are the same, or the feedback time domain positions of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH are the same.

[0298] In some embodiments, the first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process.

[0299] FIG. 24 is a diagram showing another information receiving apparatus according to an embodiment of the present invention. As shown in FIG. 24, the information receiving apparatus 2400 includes the following.

[0300] A fourth transmitting unit 2401: transmits fourth DCI to the terminal device, and the fourth DCI includes cumulative DAI information and / or total DAI information; and An eighth receiving unit 2402: receives HARQ feedback information determined based on the cumulative DAI information and / or the total DAI information transmitted by the terminal device.

[0301] In some embodiments, the cumulative DAI information and / or the total DAI information is counted in terms of the DCI for scheduling the PDSCH, with the DCI as the granularity and / or the PDSCH as the granularity.

[0302] In some embodiments, the cumulative DAI information and / or the total DAI information only counts the DCI for which the scheduled PDSCH includes at least one PDSCH corresponding to a HARQ process for which feedback is valid, for the DCI for scheduling the PDSCH.

[0303] In some embodiments, the cumulative DAI information and / or the total DAI information does not count the DCI for which the scheduled PDSCH includes only the PDSCH corresponding to the HARQ process for which feedback is invalid.

[0304] In some embodiments, the PDSCH scheduled by the fourth DCI includes a fourth PDSCH corresponding to a HARQ process with valid feedback and a second PDSCH corresponding to a HARQ process with invalid feedback, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0305] In some embodiments, the HARQ feedback information corresponding to the fourth PDSCH with valid feedback of the HARQ process corresponding to the PDSCH scheduled by the fourth DCI is related to the decoding result of the fourth PDSCH. Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback is unrelated or related to the decoding result of the second PDSCH.

[0306] In some embodiments, the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback among the PDSCHs scheduled by the fourth DCI is unrelated to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback among the PDSCHs scheduled by the fourth DCI is NACK.

[0307] In some embodiments, the cumulative DAI information and / or the total DAI information only counts the PDSCH corresponding to a HARQ process with valid feedback for the PDSCH scheduled by the DCI.

[0308] In some embodiments, the cumulative DAI information and / or the total DAI information does not count the PDSCH corresponding to a HARQ process with invalid feedback.

[0309] In some embodiments, among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process with effective feedback is related to the decoding result of the first PDSCH.

[0310] In some embodiments, the eighth receiving unit receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the PDSCH.

[0311] In some embodiments, the time domain position for transmitting the HARQ feedback information is determined based on the time domain position where the last PDSCH corresponding to the HARQ process with effective HARQ feedback scheduled by the DCI is located.

[0312] In some embodiments, the time domain position for transmitting the HARQ feedback information is determined based on the time domain position where the last PDSCH corresponding to the HARQ process with effective HARQ feedback scheduled by the DCI is located and the HARQ feedback timing.

[0313] In some embodiments, the HARQ feedback timing indicates a time domain offset between the time domain position where the last PDSCH corresponding to the HARQ process with effective HARQ feedback scheduled by the DCI is located and the time domain position for transmitting the HARQ feedback information.

[0314] In some embodiments, the fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the device further includes the following.

[0315] Fifth transmission unit (not shown): Transmits upper layer signaling to the terminal device, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0316] In some embodiments, the fourth DCI is used to schedule PDSCH and / or PUSCH.

[0317] In some embodiments, the fourth DCI is used to schedule PDSCH, and the PDSCH scheduled by the DCI includes PDSCH corresponding to HARQ processes with HARQ feedback being valid or invalid.

[0318] In some embodiments, the fourth DCI does not schedule data transmission.

[0319] In some embodiments, the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling multiple PDSCHs by one DCI.

[0320] FIG. 25 is a diagram showing another information receiving device in an embodiment of the present invention. As shown in FIG. 25, the information receiving device 2500 includes the following.

[0321] Sixth transmission unit 2501: Transmits DCI for scheduling PDSCH; and Seventh receiving unit 2502: Receives HARQ feedback information of the PDSCH scheduled by the DCI from the terminal device at a time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI, and the time domain position is determined based on the time domain position where the last PDSCH corresponding to the HARQ process with valid HARQ feedback scheduled by the DCI is located.

[0322] In some embodiments, the time domain position is determined based on the time domain position of the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI, and the HARQ feedback timing.

[0323] In some embodiments, the HARQ feedback timing indicates a time domain offset between the time domain position of the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI, and the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI.

[0324] In some embodiments, the DCI includes a first information field, and the first information field is used to indicate the HARQ feedback timing, or the apparatus further includes the following.

[0325] An eighth transmission unit (not shown): transmits upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0326] Each of the above embodiments is for exemplarily explaining the embodiments of the present invention, and the present invention is not limited thereto, and appropriate modifications may be further made based on each of the above embodiments. For example, each of the above embodiments may be used alone, or a plurality of the above embodiments may be used in combination.

[0327] It should be noted that only the components or modules related to the present invention are described above, but the present invention is not limited thereto. The information receiving apparatuses 2300-2500 may further include other components or modules, and the specific contents of these components or modules can be referred to the related art.

[0328] For convenience, only the connection relationships or signal directions between components or modules are shown in FIGS. 23 to 25. However, as can be understood by those skilled in the art, various related technologies such as bus connections may be adopted. Each of the above components or modules may be implemented by hardware such as a processor, a memory, a transmitter, a receiver, etc., but the implementation of the present invention is not limited thereto.

[0329] As can be seen from the above embodiments, when the HARQ mechanism that can support the activation / invalidation of HARQ feedback is available, the HARQ feedback information can be transmitted or not transmitted, so that the overhead of uplink control signaling can be reduced. In addition, since the network device can transmit new data without waiting for the report of the HARQ feedback information from the terminal device, the data transmission latency can also be reduced.

[0330] <Embodiment of the Eighth Aspect> In an embodiment of the present invention, a communication system is further provided. For this, reference can be made to FIG. 1, where the description of the same content as the embodiments of the first aspect to the fourth aspect is omitted.

[0331] In some embodiments, the communication system 100 may include at least a terminal device 102 and a network device 101.

[0332] In some embodiments, for the implementation manner of the terminal device 102, reference can be made to the following terminal device 2600, and for the implementation manner of the network device 101, reference can be made to the following network device 2700.

[0333] In an embodiment of the present invention, a network device is further provided, which may be, for example, a base station, but the present invention is not limited thereto, and it may also be other network devices.

[0334] FIG. 27 is a diagram showing the configuration of a network device according to an embodiment of the present invention. As shown in FIG. 27, the network device 2700 may include a processor 2710 (e.g., a central processing unit CPU) and a memory 2720, and the memory 2720 is connected to the processor 2710. Among them, the memory 2720 can store various data, can further store a program 2730 for information processing, and can execute the program 2730 under the control of the processor 2710.

[0335] For example, the processor 2710 may be configured to execute a program to implement the information reception method described in the embodiment of the fifth aspect.

[0336] Also, as shown in FIG. 27, the network device 2700 may further include a transceiver 2740, an antenna 2750, etc. Since the functions of these components are similar to those of the prior art, the detailed description thereof is omitted here. Note that the network device 2700 does not necessarily include all the components shown in FIG. 27. Also, the network device 2700 may further include components not shown in FIG. 10, but reference may be made to the prior art for this.

[0337] In an embodiment of the present invention, a terminal device is further provided, and the present invention is not limited thereto, and other devices may also be used.

[0338] FIG. 26 is a diagram showing a terminal device according to an embodiment of the present invention. As shown in FIG. 26, the terminal device 2600 includes a processor 2610 and a memory 2620. The memory 2620 stores data and programs and is connected to the processor 2610. Note that this figure is merely an example, and other types of configurations may be used to supplement or replace this configuration to implement a telecommunication function or other functions.

[0339] For example, the processor 2610 may be configured to execute a program to implement the information feedback method described in the embodiment of the first or second or third or fourth aspect.

[0340] As shown in FIG. 26, the terminal device 2600 may further include a communication module 2630, an input unit 2640, a display 2650, a power supply 2660, etc. Among them, since the functions of these components are similar to those of the prior art, the detailed description thereof is omitted here. Note that the terminal device 2600 does not necessarily include all the components shown in the block diagram 26. In addition, the terminal device 2600 may further include components not shown in FIG. 26, for which reference may be made to the prior art.

[0341] In an embodiment of the present invention, a computer program is further provided. When the program is executed on a terminal device, the program causes the terminal device to execute the information feedback method described in the embodiment of the first or second or third or fourth aspect.

[0342] In an embodiment of the present invention, a storage medium storing a computer program is further provided. The computer program causes a terminal device to execute the information feedback method described in the embodiment of the first or second or third or fourth aspect.

[0343] In an embodiment of the present invention, a computer program is further provided. When the program is executed on a network device, the program causes the network device to execute the information reception method described in the embodiment of the fifth aspect.

[0344] In an embodiment of the present invention, a storage medium storing a computer program is further provided. The computer program causes a network device to execute the information reception method described in the embodiment of the fifth aspect.

[0345] In addition, the above-described apparatus and method may be implemented by software or hardware, or may be implemented by a combination of hardware and software. The present invention further relates to a computer-readable program as follows, that is, when the program is executed by a logic component, the logic component realizes the above-described apparatus or component, or realizes the various methods or steps described above for the logic component. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor used in a computer, or the like. The present invention further relates to a storage medium storing the above-described program, such as a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, or the like.

[0346] Furthermore, one or more combinations of the functional blocks described in the drawings and / or one or more combinations of the functional blocks may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic component, discrete gate or transistor logic component, discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks described in the drawings and / or one or more combinations of the functional blocks may further be configured as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors connected in communication with a DSP, or any other configuration combination.

[0347] As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to such embodiments, and any changes to the present invention belong to the technical scope of the present invention as long as the gist of the present invention is not departed from.

[0348] Regarding the above-described embodiments and the like, the following supplementary notes are further disclosed.

[0349] (Appendix 1) An information feedback method, applicable to a terminal device, wherein the terminal device receives at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), the DCI schedules one or more PDSCHs, and among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and the method includes the terminal device transmitting HARQ feedback information about one or more PDSCHs.

[0350] (Appendix 2) The method according to Appendix 1, when the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with feedback being invalid, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0351] (Appendix 3) The method according to Appendix 2, wherein the fact that the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK.

[0352] (Appendix 4) The method according to Appendix 1, when the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process with feedback being valid, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH.

[0353] (Appendix 5) The method according to any one of Appendices 1 to 4, wherein when SPS is further set or activated in the terminal device and HARQ feedback of the HARQ process corresponding to the PDSCH (SPS PDSCH) of the SPS is disabled, the method for determining HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different.

[0354] (Appendix 6) The method according to Appendix 5, wherein the fact that the method for determining HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0355] (Appendix 7) The method according to Appendix 5, wherein the fact that the method for determining HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is different includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0356] (Appendix 8) The method according to any one of Appendices 1 to 7, wherein the terminal device transmits the HARQ feedback information at a time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs.

[0357] (Appendix 8a) The method according to any one of Appendices 1 to 8, wherein the feedback time domain positions of the HARQ feedback information corresponding to the PDSCHs scheduled by at least two DCIs are the same, or the feedback time domain positions of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH are the same.

[0358] (Appendix 9) The method according to any one of Appendices 2 to 8a, wherein the first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process.

[0359] (Appendix 10) The method according to any one of Appendices 1 to 9, wherein The at least one DCI includes a first DCI and / or a second DCI and / or a third DCI. The first DCI schedules a plurality of PDSCHs, and the plurality of PDSCHs include at least one first PDSCH corresponding to a HARQ process with valid feedback and at least one second PDSCH corresponding to a HARQ process with invalid feedback. The second DCI schedules a plurality of second PDSCHs, and all of the plurality of second PDSCHs correspond to HARQ processes with invalid HARQ feedback, or the second DCI schedules one second PDSCH, and the one second PDSCH corresponds to a HARQ process with invalid HARQ feedback. The third DCI schedules a plurality of first PDSCHs, and all of the plurality of first PDSCHs correspond to HARQ processes with valid HARQ feedback, or the third DCI schedules one first PDSCH, and the one first PDSCH corresponds to a HARQ process with valid HARQ feedback.

[0360] (Appendix 11) The method according to Appendix 10, when only at least one of the first DCIs is received, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH.

[0361] (Appendix 12) The method according to Appendix 10, A method in which, when receiving only at least one of the second DCIs, HARQ feedback information corresponding to a PDSCH scheduled by the second DCI is related to a decoding result of the PDSCH scheduled by the second DCI, or HARQ feedback information corresponding to a PDSCH scheduled by the second DCI is unrelated to a decoding result of the PDSCH scheduled by the second DCI.

[0362] (Appendix 13) The method according to Appendix 10, A method in which, when receiving only at least one of the third DCIs, HARQ feedback information corresponding to a PDSCH scheduled by the third DCI is related to a decoding result of the PDSCH scheduled by the third DCI.

[0363] (Appendix 14) The method according to Appendix 10, A method in which, when receiving at least one of the first DCIs and / or at least one of the second DCIs and further receiving at least one of the third DCIs, HARQ feedback information corresponding to the second PDSCH is unrelated to a decoding result of the second PDSCH, HARQ feedback information corresponding to the first PDSCH is related to a decoding result of the first PDSCH, or HARQ feedback information corresponding to the first PDSCH is related to a decoding result of the first PDSCH and HARQ feedback information corresponding to the second PDSCH is related to a decoding result of the second PDSCH.

[0364] (Appendix 15) The method according to Appendix 10, When SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback disabled, and only at least one of the first DCIs is received or only at least one of the third DCIs is received, or when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the SPS PDSCH has HARQ feedback disabled, and at least one of the first DCIs is received and / or at least one of the second DCIs is received, and further at least one of the third DCIs is received, The HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH; or The HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH; or The HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH; or The HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, method.

[0365] (Appendix 16) The method according to Supplementary Note 10, wherein when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback disabled, and only at least one of the second DCIs is received, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is irrelevant to the decoding result of the second PDSCH.

[0366] (Supplementary Note 17) The method according to Supplementary Note 10, wherein when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback enabled, and only at least one of the first DCIs is received or only at least one of the second DCIs is received or only at least one of the third DCIs is received, or when SPS is configured or activated in the terminal device, and the HARQ-ACK process corresponding to the SPS PDSCH has HARQ feedback enabled, and at least one of the first DCIs is received and / or at least one of the second DCIs is received, and further at least one of the third DCIs is received, The HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, method.

[0367] (Appendix 18) The method according to any one of Appendices 11 to 17, When the terminal device does not receive another DCI corresponding to the time domain position within a predetermined period before the time domain position corresponding to the HARQ feedback timing corresponding to the DCI, it represents that the terminal device has received only the DCI, method.

[0368] (Appendix 19) An information feedback method, applied to a terminal device, The terminal device receives fourth downlink control information (DCI), and the fourth DCI includes cumulative DAI information and / or total DAI information; and The method includes the terminal device determining HARQ feedback information based on the cumulative DAI information and / or the total DAI information.

[0369] (Appendix 20) The method according to Appendix 19, The cumulative DAI information and / or the total DAI information counts for the DCI for scheduling the PDSCH with the DCI as the granularity and / or counts the PDSCH with the PDSCH as the granularity, method.

[0370] (Appendix 21) The method according to Appendix 19 or 20, When counting DCI in terms of granularity, the cumulative DAI information and / or the total DAI information only count DCI for which the scheduled PDSCH includes at least one PDSCH corresponding to a HARQ process for which feedback is valid, and the scheduled PDSCH only includes DCI corresponding to HARQ processes with valid feedback.

[0371] (Appendix 22) The method according to any one of Appendices 19 to 21, When counting DCI in terms of granularity, the cumulative DAI information and / or the total DAI information do not count DCI for which the scheduled PDSCH only includes PDSCH corresponding to HARQ processes for which feedback is invalid.

[0372] (Appendix 23) The method according to any one of Appendices 19 to 21, The PDSCH scheduled by the fourth DCI includes a fourth PDSCH corresponding to a HARQ process with valid feedback and a second PDSCH corresponding to a HARQ process with invalid feedback, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0373] (Appendix 24) The method according to Appendix 23, The HARQ feedback information corresponding to the fourth PDSCH for which the feedback of the HARQ process corresponding to the PDSCH scheduled by the fourth DCI is valid is related to the decoding result of the fourth PDSCH. Among the PDSCH scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process with invalid feedback is unrelated or related to the decoding result of the second PDSCH.

[0374] (Appendix 25) The method according to Appendix 24, Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process with invalid feedback is irrelevant to the decoding result of the second PDSCH, which includes that the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process with invalid feedback among the PDSCHs scheduled by the fourth DCI is NACK. Method.

[0375] (Appendix 26) The method according to Appendix 19 or 20, wherein When counting the PDSCH by granularity, the cumulative DAI information and / or the total DAI information only count the PDSCHs corresponding to the HARQ processes with valid feedback for the PDSCHs scheduled by the DCI. Method.

[0376] (Appendix 27) The method according to Appendix 19 or 20 or 26, wherein When counting the PDSCH by granularity, the cumulative DAI information and / or the total DAI information do not count the PDSCHs corresponding to the HARQ processes with invalid feedback. Method.

[0377] (Appendix 28) The method according to Appendix 26 or 27, wherein Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process with valid feedback is related to the decoding result of the first PDSCH. Method.

[0378] (Appendix 29) The method according to any one of Appendices 19 to 28, further comprising The terminal device transmits the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the PDSCH. Method.

[0379] (Appendix 30) The method according to Supplementary Note 29, wherein the terminal device determines the time domain position for transmitting the HARQ feedback information based on the time domain position of the last PDSCH scheduled by the DCI and corresponding to a HARQ process with HARQ feedback enabled.

[0380] (Supplementary Note 31) The method according to Supplementary Note 29 or 30, wherein the terminal device determines the time domain position for transmitting the HARQ feedback information based on the time domain position of the last PDSCH scheduled by the DCI and corresponding to a HARQ process with HARQ feedback enabled, and the HARQ feedback timing.

[0381] (Supplementary Note 32) The method according to Supplementary Note 31, wherein the HARQ feedback timing indicates a time domain offset between the time domain position of the last PDSCH scheduled by the DCI and corresponding to a HARQ process with HARQ feedback enabled, and the time domain position for transmitting the HARQ feedback information.

[0382] (Supplementary Note 33) The method according to Supplementary Note 31 or 32, wherein the fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the method further includes the terminal device receiving upper layer signaling, the upper layer signaling is used to indicate the HARQ feedback timing.

[0383] (Supplementary Note 34) The method according to any one of Supplementary Notes 19 to 33, wherein the fourth DCI is used to schedule PDSCH and / or PUSCH.

[0384] (Appendix 35) The method according to any one of Appendices 19 to 34, wherein the fourth DCI is used to schedule a PDSCH, and the PDSCH scheduled by the DCI includes a PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid.

[0385] (Appendix 36) The method according to any one of Appendices 19 to 33, wherein the fourth DCI does not schedule data transmission.

[0386] (Appendix 37) The method according to Appendix 35, wherein the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling a plurality of PDSCHs by one DCI.

[0387] (Appendix 38) An information feedback method, applied to a terminal device, wherein the terminal device receives a DCI for scheduling a PDSCH; the terminal device determines a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to a HARQ process with HARQ feedback being valid and scheduled by the DCI is located; and the terminal device transmits HARQ feedback information of the PDSCH scheduled by the DCI at the determined time domain position.

[0388] (Appendix 39) The method according to Appendix 38, The method for the terminal device to determine a time domain position for transmitting HARQ feedback information of a PDSCH scheduled by the DCI, based on a time domain position where the last PDSCH corresponding to a HARQ process with HARQ feedback enabled and scheduled by the DCI is located and HARQ feedback timing.

[0389] (Appendix 40) The method according to Appendix 39, wherein the HARQ feedback timing indicates a time domain offset between a time domain position where the last PDSCH corresponding to a HARQ process with HARQ feedback enabled and scheduled by the DCI is located and a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI.

[0390] (Appendix 41) The method according to Appendix 39 or 40, wherein the DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the method further includes the terminal device receiving upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0391] (Appendix 42) An information feedback method, applicable to a terminal device, wherein the terminal device receives a PDSCH, and HARQ feedback for the HARQ process corresponding to the PDSCH is disabled; and the terminal device does not transmit a HARQ feedback codebook at a time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH.

[0392] (Appendix 43) The method according to Appendix 42, wherein A method in which the time domain position corresponds only to the PDSCH.

[0393] (Appendix 44) A method according to Appendix 43, wherein the fact that the time domain position corresponds only to the PDSCH includes that there is no other downlink transmission corresponding to the time domain position before a predetermined time of the time domain position.

[0394] (Appendix 45) A method according to Appendix 42, wherein the terminal device determines that the time domain position corresponds only to the PDSCH based on C-DAI and / or T-DAI in DCI, and / or the terminal device determines that the time domain position corresponds only to the PDSCH based on the SPS setting and / or active state.

[0395] (Appendix 46) A method according to Appendix 42 or 45, wherein the terminal device determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on C-DAI and / or T-DAI in DCI, and / or the terminal device determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the SPS setting and / or active state.

[0396] (Appendix 47) A method according to any one of Appendices 42 to 46, further comprising the terminal device not generating the HARQ feedback codebook corresponding to the PDSCH.

[0397] (Appendix 48) A method according to any one of Appendices 42 to 47, The method, wherein the PDSCH includes a PDSCH scheduled by DCI and / or an SPS PDSCH.

[0398] (Appendix 49) The method according to any one of Appendices 42 to 48, wherein a plurality of PDSCHs among the PDSCHs are scheduled by the same DCI.

[0399] (Appendix 50) An information receiving method, applied to a network device, wherein the network device transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) to a terminal device, the DCI schedules one or more PDSCHs, and among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and the network device receives HARQ feedback information about one or more PDSCHs transmitted by the terminal device.

[0400] (Appendix 51) The method according to Appendix 50, when the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with feedback being invalid, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0401] (Appendix 52) The method according to Appendix 51, wherein the fact that the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK.

[0402] (Appendix 53) The method according to Appendix 50, wherein when the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process for which feedback is valid, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH.

[0403] (Appendix 54) The method according to any one of Appendices 50 to 53, wherein when SPS is further set or activated in the terminal device and the HARQ feedback of the HARQ process corresponding to the PDSCH of the SPS (SPS PDSCH) is invalidated, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different.

[0404] (Appendix 55) The method according to Appendix 54, wherein the fact that the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0405] (Appendix 56) The method according to Appendix 54, wherein The fact that the determination methods of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH are different includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is not related to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is not related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH, method.

[0406] (Appendix 57) The method according to any one of Appendices 49 to 56, The method in which the network device receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs.

[0407] (Appendix 58) The method according to any one of Appendices 50 to 57, The feedback time domain positions of the HARQ feedback information corresponding to the PDSCHs scheduled by at least two DCIs are the same, or the feedback time domain positions of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH are the same, method.

[0408] (Appendix 59) The method according to any one of Appendices 51 to 58, The first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process, method.

[0409] (Appendix 60) An information receiving method, applied to a network device, The network device transmits a fourth DCI to the terminal device, and the fourth DCI includes cumulative DAI information and / or total DAI information; and A method, including the network device receiving, from the terminal device, HARQ feedback information determined based on the cumulative DAI information and / or the total DAI information.

[0410] (Appendix 61) The method according to Appendix 60, wherein the cumulative DAI information and / or the total DAI information counts DCI for scheduling PDSCH by taking DCI as a granularity and / or counts PDSCH by taking PDSCH as a granularity.

[0411] (Appendix 62) The method according to Appendix 60 or 61, wherein when counting DCI by taking DCI as a granularity, the cumulative DAI information and / or the total DAI information only counts DCI for scheduling PDSCH, where the scheduled PDSCH includes at least one PDSCH corresponding to a HARQ process for which feedback is valid.

[0412] (Appendix 63) The method according to any one of Appendices 60 to 62, wherein when counting DCI by taking DCI as a granularity, the cumulative DAI information and / or the total DAI information does not count DCI that includes only PDSCH corresponding to a HARQ process for which feedback is invalid.

[0413] (Appendix 64) The method according to any one of Appendices 60 to 62, wherein the PDSCH scheduled by the fourth DCI includes a fourth PDSCH corresponding to a HARQ process for which feedback is valid and a second PDSCH corresponding to a HARQ process for which feedback is invalid, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0414] (Appendix 65) The method according to Appendix 64, wherein the HARQ feedback information corresponding to the fourth PDSCH for which the feedback of the HARQ process corresponding to the PDSCH scheduled by the fourth DCI is valid is related to the decoding result of the fourth PDSCH, and among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid is unrelated or related to the decoding result of the second PDSCH.

[0415] (Appendix 66) The method according to Appendix 65, wherein among the PDSCHs scheduled by the fourth DCI, the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid is unrelated to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid among the PDSCHs scheduled by the fourth DCI is NACK.

[0416] (Appendix 67) The method according to Appendix 60 or 61, wherein when counting the PDSCH by granularity, the cumulative DAI information and / or the total DAI information count only the PDSCHs corresponding to the HARQ processes for which the feedback is valid for the PDSCHs scheduled by the DCI.

[0417] (Appendix 68) The method according to Appendix 60 or 61 or 67, wherein when counting the PDSCH by granularity, the cumulative DAI information and / or the total DAI information do not count the PDSCHs corresponding to the HARQ processes for which the feedback is invalid.

[0418] (Appendix 69) The method according to Appendix 67 or 68, wherein among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process with valid feedback is related to the decoding result of the first PDSCH.

[0419] (Appendix 70) The method according to any one of Appendices 60 to 69, wherein the network device receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the PDSCH.

[0420] (Appendix 71) The method according to Appendix 60, wherein the time domain position for transmitting the HARQ feedback information is determined based on the time domain position where the last PDSCH corresponding to the HARQ process with valid HARQ feedback is located, which is scheduled by the DCI.

[0421] (Appendix 72) The method according to Appendix 60 or 71, wherein the time domain position for transmitting the HARQ feedback information is determined based on the time domain position where the last PDSCH corresponding to the HARQ process with valid HARQ feedback is located, which is scheduled by the DCI, and the HARQ feedback timing.

[0422] (Appendix 73) The method according to Appendix 72, wherein the HARQ feedback timing indicates the time domain offset between the time domain position where the last PDSCH corresponding to the HARQ process with valid HARQ feedback is located, which is scheduled by the DCI, and the time domain position for transmitting the HARQ feedback information.

[0423] (Appendix 74) The method according to claim 72 or 73, wherein the fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the method further comprises the network device transmitting upper layer signaling to the terminal device, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0424] (Appendix 75) The method according to any one of Appendices 60 to 74, wherein the fourth DCI is used to schedule PDSCH and / or PUSCH.

[0425] (Appendix 76) The method according to any one of Appendices 60 to 75, wherein the fourth DCI is used to schedule PDSCH, and the PDSCH scheduled by the DCI includes PDSCH corresponding to HARQ processes with HARQ feedback being valid or invalid.

[0426] (Appendix 77) The method according to any one of Appendices 60 to 74, wherein the fourth DCI does not schedule data transmission.

[0427] (Appendix 78) The method according to Appendix 76, wherein the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling a plurality of PDSCHs by one DCI.

[0428] (Appendix 79) An information receiving method, applicable to a network device, The network device transmits DCI for scheduling PDSCH; and The method includes receiving, by the network device, HARQ feedback information of the PDSCH scheduled by the DCI at a time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI, where the time domain position is determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located.

[0429] (Appendix 80) The method according to Appendix 79, wherein the time domain position is determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located and the HARQ feedback timing.

[0430] (Appendix 81) The method according to Appendix 79, wherein the HARQ feedback timing indicates a time domain offset between the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located and the time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI.

[0431] (Appendix 82) The method according to Appendix 79 or 80, wherein the DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the method further includes the network device transmits upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0432] (Appendix 83) A terminal device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the information feedback method according to any one of Appendices 1 to 49. A terminal device.

[0433] (Appendix 84) A network device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the information reception method according to any one of Appendices 50 to 82. A network device.

[0434] (Appendix 85) A communication system, including the terminal device according to Appendix 83; and / or the network device according to Appendix 85. A communication system.

[0435] Furthermore, regarding the above-described embodiments and the like, the following appendices are further disclosed.

[0436] (Appendix 1) An information feedback device applied to a terminal device, a first receiving unit for receiving at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), wherein the DCI schedules one or more PDSCHs, and the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and a device including a first transmitting unit for transmitting HARQ feedback information about one or more PDSCHSs.

[0437] (Appendix 2) The apparatus according to Supplementary Note 1, wherein when the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process for which feedback is invalid, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH; an apparatus

[0438] (Supplementary Note 3) The apparatus according to Supplementary Note 2, wherein the fact that the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK; an apparatus

[0439] (Supplementary Note 4) The apparatus according to Supplementary Note 1, wherein when the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process for which feedback is valid, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH; an apparatus

[0440] (Supplementary Note 5) The apparatus according to any one of Supplementary Notes 1 to 4, wherein when SPS is further set or activated in the terminal device and the HARQ feedback of the HARQ process corresponding to the PDSCH of the SPS (SPS PDSCH) is invalidated, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different; an apparatus

[0441] (Supplementary Note 6) The apparatus according to Supplementary Note 5, wherein The fact that the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH, device.

[0442] (Appendix 7) The device according to Appendix 5, wherein The fact that the determination method of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is different includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH, device.

[0443] (Appendix 8) The device according to any one of Appendices 1 to 7, wherein The terminal device transmits the HARQ feedback information at a time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs.

[0444] (Appendix 8a) The device according to any one of Appendices 1 to 8, wherein The feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by at least two DCIs is the same, or the feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH is the same, apparatus.

[0445] (Appendix 9) The apparatus according to any one of Appendices 2 to 8a, The first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process, apparatus.

[0446] (Appendix 10) The apparatus according to any one of Appendices 1 to 9, The at least one DCI includes a first DCI and / or a second DCI and / or a third DCI, the first DCI schedules a plurality of PDSCHs, and the plurality of PDSCHs include at least one first PDSCH corresponding to a HARQ process with valid feedback and at least one second PDSCH corresponding to a HARQ process with invalid feedback, the second DCI schedules a plurality of second PDSCHs, and all of the plurality of second PDSCHs correspond to HARQ processes with invalid HARQ feedback, or the second DCI schedules one second PDSCH, and the one second PDSCH corresponds to a HARQ process with invalid HARQ feedback, the third DCI schedules a plurality of first PDSCHs, and all of the plurality of first PDSCHs correspond to HARQ processes with valid HARQ feedback, or the third DCI schedules one first PDSCH, and the one first PDSCH corresponds to a HARQ process with valid HARQ feedback, apparatus.

[0447] (Appendix 11) The apparatus according to Appendix 10, An apparatus, when the first receiving unit receives only at least one of the first DCIs, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH.

[0448] (Appendix 12) The apparatus according to Appendix 10, An apparatus, when the first receiving unit receives only at least one of the second DCIs, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is independent of the decoding result of the PDSCH scheduled by the second DCI.

[0449] (Appendix 13) The apparatus according to Appendix 10, An apparatus, when the first receiving unit receives only at least one of the third DCIs, the HARQ feedback information corresponding to the PDSCH scheduled by the third DCI is related to the decoding result of the PDSCH scheduled by the third DCI.

[0450] (Appendix 14) The apparatus according to Appendix 10, When the first receiving unit has received at least one of the first DCIs and / or at least one of the second DCIs and further at least one of the third DCIs, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, or the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH, an apparatus.

[0451] (Appendix 15) The apparatus according to Appendix 10, when SPS is set or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback disabled, and the first receiving unit has received only at least one of the first DCIs or only at least one of the third DCIs, or when SPS is set or activated in the terminal device, and the HARQ-ACK process corresponding to the SPS PDSCH has HARQ feedback disabled, and the first receiving unit has received at least one of the first DCIs and / or at least one of the second DCIs and further at least one of the third DCIs, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH; or The HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH; or, The HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, and the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH; or, The HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, apparatus.

[0452] (Appendix 16) The apparatus according to Appendix 10, when SPS is set or activated in the terminal device, and the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS has HARQ feedback disabled, and the first receiving unit receives only at least one of the second DCIs, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is related to the decoding result of the PDSCH scheduled by the second DCI, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the PDSCH scheduled by the second DCI is irrelevant to the decoding result of the second PDSCH, apparatus.

[0453] (Appendix 17) The apparatus according to Appendix 10, wherein SPS is set or activated in the terminal device, and HARQ feedback for the HARQ-ACK process corresponding to the PDSCH (SPS PDSCH) of the SPS is enabled, and the first receiving unit receives only at least one of the first DCIs or only at least one of the second DCIs or only at least one of the third DCIs, or wherein SPS is set or activated in the terminal device, and HARQ feedback for the HARQ-ACK process corresponding to the SPS PDSCH is enabled, and the first receiving unit receives at least one of the first DCIs and / or at least one of the second DCIs, and further receives at least one third DCI, the HARQ feedback information corresponding to the SPS PDSCH is independent of the decoding result of the SPS PDSCH, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, and the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH; or the HARQ feedback information of the first PDSCH is related to the decoding result of the first PDSCH, the HARQ feedback information of the second PDSCH is related to the decoding result of the second PDSCH, and the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, apparatus.

[0454] (Appendix 18) The apparatus according to any one of Appendices 11 to 17, wherein when the first receiving unit does not receive other DCIs corresponding to the time domain position within a predetermined period before the time domain position corresponding to the HARQ feedback timing corresponding to the DCI, it indicates that the terminal device has received only the DCI, apparatus.

[0455] (Appendix 19) An information feedback apparatus applied to a terminal device, a second receiving unit that receives fourth downlink control information (DCI), where the fourth DCI includes cumulative DAI information and / or total DAI information; and a device including a first determining unit that determines HARQ feedback information based on the cumulative DAI information and / or the total DAI information.

[0456] (Appendix 20) The apparatus according to Appendix 19, where the cumulative DAI information and / or the total DAI information count the DCI for scheduling the PDSCH in terms of the DCI granularity and / or count the PDSCH in terms of the PDSCH granularity.

[0457] (Appendix 21) The apparatus according to Appendix 19 or 20, where the cumulative DAI information and / or the total DAI information only count the DCI for scheduling the PDSCH, and the scheduled PDSCH includes at least one PDSCH corresponding to a HARQ process for which feedback is valid.

[0458] (Appendix 22) The apparatus according to any one of Appendices 19 to 21, where the cumulative DAI information and / or the total DAI information do not count the DCI for which the scheduled PDSCH only includes the PDSCH corresponding to a HARQ process for which feedback is invalid.

[0459] (Appendix 23) The apparatus according to any one of Appendices 19 to 21, where the PDSCH scheduled by the fourth DCI includes a fourth PDSCH corresponding to a HARQ process for which feedback is valid and a second PDSCH corresponding to a HARQ process for which feedback is invalid, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0460] (Appendix 24) The apparatus according to Appendix 23, The HARQ feedback information corresponding to the fourth PDSCH for which the feedback of the HARQ process corresponding to the PDSCH scheduled by the fourth DCI is valid is related to the decoding result of the fourth PDSCH. Among the PDSCHs scheduled by the fourth DCI, the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid is unrelated or related to the decoding result of the second PDSCH. Apparatus.

[0461] (Appendix 25) The apparatus according to Appendix 24, Among the PDSCHs scheduled by the fourth DCI, the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid is unrelated to the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH corresponding to the HARQ process for which the feedback is invalid among the PDSCHs scheduled by the fourth DCI is NACK. Apparatus.

[0462] (Appendix 26) The apparatus according to Appendix 19 or 20, The cumulative DAI information and / or the total DAI information only count the PDSCHs corresponding to the HARQ processes for which the feedback is valid for the PDSCH scheduled by the DCI. Apparatus.

[0463] (Appendix 27) The apparatus according to Appendix 19 or 20 or 26, The cumulative DAI information and / or the total DAI information do not count the PDSCHs corresponding to the HARQ processes for which the feedback is invalid. Apparatus.

[0464] (Appendix 28) The apparatus according to Appendix 26 or 27, An apparatus, wherein HARQ feedback information corresponding to a first PDSCH corresponding to a HARQ process with valid feedback among PDSCHs scheduled by the fourth DCI is related to a decoding result of the first PDSCH.

[0465] (Appendix 29) The apparatus according to any one of Appendices 19 to 28, further comprising: a second transmission unit that transmits the HARQ feedback information at a time domain position for transmitting the HARQ feedback information corresponding to the PDSCH.

[0466] (Appendix 30) The apparatus according to Appendix 29, further comprising: a second determination unit that determines a time domain position for transmitting the HARQ feedback information based on a time domain position where a last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located.

[0467] (Appendix 31) The apparatus according to Appendix 29 or 30, wherein the second determination unit determines the time domain position for transmitting the HARQ feedback information based on a time domain position where a last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and HARQ feedback timing.

[0468] (Appendix 32) The apparatus according to Appendix 31, wherein the HARQ feedback timing indicates a time domain offset between a time domain position where a last PDSCH corresponding to a HARQ process with valid HARQ feedback scheduled by the DCI is located and a time domain position for transmitting the HARQ feedback information.

[0469] (Appendix 33) The apparatus according to Appendix 31 or 32, wherein the fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the apparatus further includes a third receiving unit that receives upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing.

[0470] (Appendix 34) The apparatus according to any one of Appendices 19 to 33, wherein the fourth DCI is used to schedule the PDSCH and / or PUSCH.

[0471] (Appendix 35) The apparatus according to any one of Appendices 19 to 34, wherein the fourth DCI is used to schedule the PDSCH, and the PDSCH scheduled by the DCI includes the PDSCH corresponding to the HARQ process with HARQ feedback being valid or invalid.

[0472] (Appendix 36) The apparatus according to any one of Appendices 19 to 33, wherein the fourth DCI does not schedule data transmission.

[0473] (Appendix 37) The apparatus according to Appendix 35, wherein the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling a plurality of PDSCHs by one DCI.

[0474] (Appendix 38) An information feedback apparatus, which is applied to a terminal device, A fourth receiving unit that receives DCI for scheduling PDSCH; and A third determining unit that determines a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to an HARQ process with valid HARQ feedback is located and scheduled by the DCI; and An apparatus including a second transmitting unit that transmits HARQ feedback information of the PDSCH scheduled by the DCI at the determined time domain position.

[0475] (Appendix 39) The apparatus according to Appendix 38, wherein the third determining unit determines a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI based on a time domain position where the last PDSCH corresponding to an HARQ process with valid HARQ feedback is located and scheduled by the DCI and HARQ feedback timing.

[0476] (Appendix 40) The apparatus according to Appendix 39, wherein the HARQ feedback timing indicates a time domain offset between a time domain position where the last PDSCH corresponding to an HARQ process with valid HARQ feedback is located and scheduled by the DCI and a time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI.

[0477] (Appendix 41) The apparatus according to Appendix 39 or 40, wherein the DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the apparatus further An apparatus comprising a fifth receiving unit that receives upper layer signaling, wherein the upper layer signaling is used to indicate the HARQ feedback timing.

[0478] (Appendix 42) An information feedback apparatus applied to a terminal device, a sixth receiving unit that receives a PDSCH, wherein HARQ feedback for the PDSCH is disabled; and an apparatus comprising a processing unit that does not transmit a HARQ feedback codebook at a time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH.

[0479] (Appendix 43) The apparatus according to Appendix 42, wherein the time domain position corresponds only to the PDSCH.

[0480] (Appendix 44) The apparatus according to Appendix 43, wherein the fact that the time domain position corresponds only to the PDSCH includes that there is no other downlink transmission corresponding to the time domain position before a predetermined time of the time domain position.

[0481] (Appendix 45) The apparatus according to Appendix 42, wherein the processing unit determines that the time domain position corresponds only to the PDSCH based on C-DAI and / or T-DAI in DCI, and / or determines that the time domain position corresponds only to the PDSCH based on the SPS setting and / or active state.

[0482] (Appendix 46) The apparatus according to Appendix 42 or 45, The processing unit determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on C-DAI and / or T-DAI in DCI, and / or determines not to transmit the HARQ feedback codebook at the time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on the configuration and / or active state of SPS.

[0483] (Appendix 47) The apparatus according to any one of Appendices 42 to 46, wherein the processing unit does not generate the HARQ feedback codebook corresponding to the PDSCH.

[0484] (Appendix 48) The apparatus according to any one of Appendices 42 to 47, wherein the PDSCH includes the PDSCH scheduled by DCI and / or the SPS PDSCH.

[0485] (Appendix 49) The apparatus according to any one of Appendices 42 to 48, wherein a plurality of PDSCHs among the PDSCHs are scheduled by the same DCI.

[0486] (Appendix 50) An information receiving apparatus applied to a network apparatus, a third transmitting unit that transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) to a terminal apparatus, wherein the DCI schedules one or more PDSCHs, and among them, the one or more PDSCHs include at least one PDSCH corresponding to a HARQ process with HARQ feedback being valid or invalid; and An apparatus comprising a seventh receiving unit that receives HARQ feedback information for one or more PDSCHSs transmitted by the terminal device.

[0487] (Appendix 51) The apparatus according to Appendix 50, When the PDSCH scheduled by the DCI includes a second PDSCH corresponding to a HARQ process with feedback disabled, the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH.

[0488] (Appendix 52) The apparatus according to Appendix 51, The fact that the HARQ feedback information corresponding to the second PDSCH is independent of the decoding result of the second PDSCH includes that the HARQ feedback information corresponding to the second PDSCH is NACK.

[0489] (Appendix 53) The apparatus according to Appendix 50, When the PDSCH scheduled by the DCI includes a first PDSCH corresponding to a HARQ process with feedback enabled, the HARQ feedback information corresponding to the first PDSCH is related to the decoding result of the first PDSCH.

[0490] (Appendix 54) The apparatus according to any one of Appendices 50 to 53, When SPS is further set or activated in the terminal device and the HARQ feedback of the HARQ process corresponding to the PDSCH of the SPS (SPS PDSCH) is disabled, the method for determining the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH is the same or different.

[0491] (Appendix 55) The apparatus according to Supplementary Note 54, The fact that the determination methods of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH are the same includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH. Apparatus.

[0492] (Supplementary Note 56) The apparatus according to Supplementary Note 54, The fact that the determination methods of the HARQ feedback information corresponding to the SPS PDSCH and the second PDSCH are different includes the following, that is, the HARQ feedback information corresponding to the SPS PDSCH is related to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is irrelevant to the decoding result of the second PDSCH, or the HARQ feedback information corresponding to the SPS PDSCH is irrelevant to the decoding result of the SPS PDSCH, and the HARQ feedback information corresponding to the second PDSCH is related to the decoding result of the second PDSCH. Apparatus.

[0493] (Supplementary Note 57) The apparatus according to any one of Supplementary Notes 49 to 56, The seventh receiving unit receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the one or more PDSCHs. Apparatus.

[0494] (Supplementary Note 58) The apparatus according to any one of Supplementary Notes 50 to 57, The feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by at least two DCIs is the same, or the feedback time domain position of the HARQ feedback information corresponding to the PDSCH scheduled by at least one DCI and the SPS PDSCH is the same, apparatus.

[0495] (Appendix 59) The apparatus according to any one of Appendices 51 to 58, The first PDSCH and / or the second PDSCH is the actually transmitted PDSCH, and / or the first PDSCH and / or the second PDSCH has a corresponding HARQ process, apparatus.

[0496] (Appendix 60) An information receiving apparatus, applied to a network apparatus, A fourth transmitting unit that transmits a fourth DCI to a terminal apparatus, the fourth DCI including cumulative DAI information and / or total DAI information; and An apparatus including an eighth receiving unit that receives HARQ feedback information determined based on the cumulative DAI information and / or the total DAI information transmitted by the terminal apparatus.

[0497] (Appendix 61) The apparatus according to Appendix 60, The cumulative DAI information and / or the total DAI information count for the DCI for scheduling the PDSCH, with the DCI as the granularity and / or count the PDSCH with the PDSCH as the granularity, apparatus.

[0498] (Appendix 62) The apparatus according to Appendix 60 or 61, The cumulative DAI information and / or the total DAI information count for the DCI for scheduling the PDSCH, and only count the DCI in which at least one PDSCH corresponding to a HARQ process with valid feedback is included in the scheduled PDSCH, apparatus.

[0499] (Supplementary Note 63) An apparatus according to any one of Supplementary Notes 60 to 62, wherein the cumulative DAI information and / or the total DAI information does not count DCI including only PDSCH corresponding to a HARQ process for which feedback is invalid for a scheduled PDSCH.

[0500] (Supplementary Note 64) An apparatus according to any one of Supplementary Notes 60 to 62, wherein the fourth PDSCH corresponding to a HARQ process for which feedback is valid and the second PDSCH corresponding to a HARQ process for which feedback is invalid are included in the PDSCH scheduled by the fourth DCI, and the cumulative DAI information / or the total DAI information counts the fourth DCI.

[0501] (Supplementary Note 65) An apparatus according to Supplementary Note 64, wherein HARQ feedback information corresponding to the fourth PDSCH for which feedback is valid for the HARQ process corresponding to the PDSCH scheduled by the fourth DCI is related to the decoding result of the fourth PDSCH, and among the PDSCH scheduled by the fourth DCI, HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process for which feedback is invalid is unrelated to or related to the decoding result of the second PDSCH.

[0502] (Supplementary Note 66) An apparatus according to Supplementary Note 65, wherein the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process for which feedback is invalid among the PDSCH scheduled by the fourth DCI is unrelated to the decoding result of the second PDSCH includes the fact that the HARQ feedback information corresponding to the second PDSCH corresponding to a HARQ process for which feedback is invalid among the PDSCH scheduled by the fourth DCI is NACK.

[0503] (Appendix 67) The device according to Appendix 60 or 61, wherein for the PDSCH scheduled by DCI, the cumulative DAI information and / or the total DAI information only count the PDSCH corresponding to the HARQ process for which feedback is valid.

[0504] (Appendix 68) The device according to Appendix 60 or 61 or 67, wherein the cumulative DAI information and / or the total DAI information do not count the PDSCH corresponding to the HARQ process for which feedback is invalid.

[0505] (Appendix 69) The device according to Appendix 67 or 68, wherein for the PDSCH scheduled by the fourth DCI, the HARQ feedback information corresponding to the first PDSCH corresponding to the HARQ process for which feedback is valid is related to the decoding result of the first PDSCH.

[0506] (Appendix 70) The device according to any one of Appendices 60 to 69, wherein the eighth receiving unit receives the HARQ feedback information at the time domain position for transmitting the HARQ feedback information corresponding to the PDSCH.

[0507] (Appendix 71) The device according to Appendix 60, wherein the time domain position for transmitting the HARQ feedback information is determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located.

[0508] (Appendix 72) The device according to Appendix 60 or 71, wherein The time domain position for transmitting the HARQ feedback information is determined based on the time domain position of the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI, and the HARQ feedback timing, and the device.

[0509] (Appendix 73) The device according to Appendix 72, The HARQ feedback timing is the time domain offset between the time domain position of the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI, and the time domain position for transmitting the HARQ feedback information, and the device.

[0510] (Appendix 74) The device according to Appendix 72 or 73, The fourth DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the device further includes a fifth transmission unit that transmits upper layer signaling to the terminal device, and the upper layer signaling is used to indicate the HARQ feedback timing, and the device.

[0511] (Appendix 75) The device according to any one of Appendices 60 to 74, The fourth DCI is used to schedule the PDSCH and / or PUSCH, and the device.

[0512] (Appendix 76) The device according to any one of Appendices 60 to 75, The fourth DCI is used to schedule the PDSCH, and the PDSCH scheduled by the DCI includes the PDSCH corresponding to the HARQ process for which HARQ feedback is valid or invalid, and the device.

[0513] (Appendix 77) The apparatus according to any one of Appendices 60 to 74, wherein the fourth DCI does not schedule data transmission.

[0514] (Appendix 78) The apparatus according to Appendix 76, wherein the fourth DCI schedules one or more PDSCHs, and the PDSCH time domain resource allocation table used by the fourth DCI supports scheduling a plurality of PDSCHs by one DCI.

[0515] (Appendix 79) An information receiving apparatus applied to a network apparatus, a sixth transmitting unit that transmits DCI for scheduling a PDSCH; and a seventh receiving unit that receives HARQ feedback information of the PDSCH scheduled by the DCI at a time domain position for transmitting the HARQ feedback information of the PDSCH scheduled by the DCI, wherein the time domain position is determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located.

[0516] (Appendix 80) The apparatus according to Appendix 79, wherein the time domain position is determined based on the time domain position where the last PDSCH corresponding to the HARQ process for which HARQ feedback is valid and scheduled by the DCI is located and the HARQ feedback timing.

[0517] (Appendix 81) The apparatus according to Appendix 79, The HARQ feedback timing indicates a time domain offset between the time domain position where the last PDSCH corresponding to a HARQ process with valid HARQ feedback is located, which is scheduled by the DCI, and the time domain position for transmitting HARQ feedback information of the PDSCH scheduled by the DCI, and the apparatus.

[0518] (Appendix 82) The apparatus according to Appendix 79 or 80, The DCI includes a first information field, the first information field is used to indicate the HARQ feedback timing, or the apparatus further includes an eighth transmission unit for transmitting upper layer signaling, and the upper layer signaling is used to indicate the HARQ feedback timing, and the apparatus.

[0519] (Appendix 83) An information feedback method, which is applied to a terminal device, the terminal device receives DCI for scheduling a PDSCH; the terminal device receives the PDSCH; and the method includes determining that the terminal device needs to transmit a HARQ feedback codebook at a time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on C-DAI and / or T-DAI in the DCI.

[0520] (Appendix 84) An information feedback apparatus, which is applied to a terminal device, a DCI for scheduling a PDSCH, and a receiving unit for receiving the PDSCH; and a determination unit for determining that it is necessary to transmit a HARQ feedback codebook at a time domain position for transmitting the HARQ feedback codebook corresponding to the PDSCH based on C-DAI and / or T-DAI in the DCI, and the apparatus.

Claims

1. An apparatus for feeding back information, applicable to a terminal device, comprising: a receiver that receives at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), wherein the at least one DCI schedules one or more PDSCHs; and a transmitter that transmits hybrid automatic repeat request - acknowledgement (HARQ - ACK) information for at least one PDSCH corresponding to a HARQ process for which HARQ feedback is valid among the one or more PDSCHs, wherein the receiver further receives a radio resource control (RRC) signal including indication information used to indicate activation and / or de - activation of HARQ feedback, wherein the indication information includes a bitmap, bits in the bitmap correspond to HARQ processes (IDs), the bits set to 1 identify the HARQ processes for which HARQ feedback is invalid, and the bits set to 0 identify the HARQ processes for which HARQ feedback is valid.

2. The apparatus according to claim 1, wherein the DCI among the at least one DCI schedules one PDSCH or a plurality of PDSCHs.

3. The apparatus according to claim 1, wherein the HARQ - ACK information for the at least one PDSCH is related to the decoding result of the transport block of the at least one PDSCH.

4. The apparatus according to claim 1, wherein the HARQ processes corresponding to the bitmap include all configured HARQ processes of the cell.

5. The apparatus according to claim 1, further comprising a processor, wherein the processor determines activation and / or de - activation of HARQ feedback for the PDSCH(s) scheduled by the DCI based on the indication information.

6. The apparatus according to claim 1, wherein the HARQ - ACK information of the at least one PDSCH is multiplexed in a Type - 1 HARQ - ACK codebook. The transmitter reports, in the Type-1 HARQ-ACK codebook, a NACK value as HARQ-ACK information bits corresponding to a transport block of a PDSCH corresponding to a HARQ process for which HARQ feedback is invalid. **Claim 7** The apparatus according to claim 6, wherein the PDSCH corresponding to the HARQ process for which HARQ feedback is invalid includes a PDSCH scheduled by the DCI or an SPS PDSCH. **Claim 8** The apparatus according to claim 1, wherein the HARQ-ACK information of the at least one PDSCH is multiplexed in a Type-2 HARQ-ACK codebook determined based on cumulative DAI and / or total DAI in the DCI. **Claim 9** The apparatus according to claim 8, wherein the DCI carrying the cumulative DAI and / or the total DAI schedules a PDSCH corresponding to a HARQ process for which HARQ feedback is valid and / or a PDSCH corresponding to a HARQ process for which HARQ feedback is invalid, or schedules a PUSCH, or does not schedule a PDSCH or a PUSCH. **Claim 10** The apparatus according to claim 8, wherein the cumulative DAI and / or the total DAI do not count the DCI that schedules a PDSCH including only a PDSCH corresponding to a HARQ process for which HARQ feedback is invalid, or do not count a PDSCH corresponding to a HARQ process for which HARQ feedback is invalid. **Claim 11** The apparatus according to claim 1, wherein the transmitter does not provide a HARQ-ACK codebook when only a PDSCH associated with a HARQ process for which HARQ feedback is invalid is scheduled. **Claim 12** An apparatus for receiving information, applied to a network device, a transmitter that transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), wherein the at least one DCI schedules one or more PDSCHs; and A receiver that receives HARQ-ACK information for at least one of the one or more PDSCHs corresponding to a HARQ process for which HARQ feedback is valid. The transmitter further transmits an RRC (Radio Resource Control) signal including indication information used to indicate activation and / or deactivation of HARQ feedback. The indication information includes a bitmap, bits in the bitmap correspond to HARQ processes (IDs), the bits set to 1 identify the HARQ processes for which HARQ feedback is invalid, and the bits set to 0 identify the HARQ processes for which HARQ feedback is valid. **Claim 13** The apparatus according to claim 12, wherein the HARQ-ACK information for the at least one PDSCH is related to the decoding result of the transport block of the at least one PDSCH. **Claim 14** The apparatus according to claim 12, determining activation and / or deactivation of HARQ feedback for the PDSCH(s) scheduled by the DCI based on the indication information. **Claim 15** The apparatus according to claim 12, wherein the HARQ processes corresponding to the bitmap include all configured HARQ processes of the cell. **Claim 16** A communication system including a network device and a terminal device, wherein the network device transmits at least one downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), the at least one DCI schedules one or more PDSCHs, the terminal device receives the at least one DCI, and transmits HARQ-ACK information for at least one of the one or more PDSCHs corresponding to a HARQ process for which HARQ feedback is valid to the network device, the terminal device further receives an RRC (Radio Resource Control) signal including indication information used to indicate activation and / or deactivation of HARQ feedback. The indication information includes a bitmap, bits in the bitmap correspond to HARQ processes (IDs), the bits set to 1 identify the HARQ processes for which HARQ feedback is invalid, and the bits set to 0 identify the HARQ processes for which HARQ feedback is valid, communication system.

Images