Information indication method, device, terminal, network equipment and storage medium

Abstract

The present application provides an information indication method, apparatus, terminal, network device and storage medium, the method comprising: receiving DCI, the DCI being used to indicate: whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; responding to the DCI. Since the DCI indicates whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, the present application can improve the flexibility of the terminal in responding to the physical downlink channel, and can also save PUCCH resources and terminal power consumption.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an information indication method, device, terminal, network equipment and storage medium. Background Art

[0002] Some physical downlink channels in some communication systems support repeated transmission, such as repeated transmission of the physical downlink shared channel (PDSCH). And the terminal provides feedback for these physical downlink channels, such as Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) feedback. However, currently, the terminal performs a unified response for all unicast physical downlink shared channels (for example, feedback is provided for each physical downlink channel), resulting in poor flexibility in the terminal's response to the physical downlink channel. Summary of the invention

[0003] Embodiments of the present application provide an information indication method, apparatus, terminal, network device, and storage medium, which can improve the flexibility of the terminal in responding to a physical downlink channel.

[0004] In a first aspect, an embodiment of the present application provides an information indication method, which is executed by a terminal and includes:

[0005] receiving downlink control information (DCI), where the DCI is used to indicate at least one of whether a physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel;

[0006] Respond to the DCI.

[0007] In a second aspect, an embodiment of the present application provides an information indication method, which is performed by a network device, including:

[0008] Downlink control information DCI is sent, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0009] In a third aspect, an embodiment of the present application provides an information indication device, which is executed by a terminal, including:

[0010] A receiving module, configured to receive downlink control information DCI, wherein the DCI is used to indicate at least one of: whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel;

[0011] A response module is used to respond to the DCI.

[0012] In a fourth aspect, an embodiment of the present application provides an information indication device, including:

[0013] Downlink control information DCI is sent, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0014] In the fifth aspect, an embodiment of the present application provides a terminal, comprising: a memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the information indication method on the terminal side provided in the embodiment of the present application.

[0015] In the sixth aspect, an embodiment of the present application provides a network device, characterized in that it includes: a memory, a processor, and a program or instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, the steps in the information indication method on the network device side provided in the embodiment of the present application are implemented.

[0016] In the seventh aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the information indication method on the terminal side provided by the embodiment of the present application are implemented; or, when the program or instruction is executed by a processor, the steps of the information indication method on the network device side provided by the embodiment of the present application are implemented.

[0017] In an embodiment of the present application, a DCI is received, and the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; and the DCI is responded to. Since the DCI indicates at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, responding to the DCI can achieve a flexible response according to the content indicated by the DCI, thereby improving the flexibility of the terminal in responding to the physical downlink channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A block diagram showing a wireless communication system to which the embodiments of the present application can be applied;

[0019] Figure 2 is a flow chart of an information indication method provided by an embodiment of the present application;

[0020] Figure 3 is a flowchart of another information indication sending method provided by an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of a PDSCH transmission provided in an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of another PDSCH transmission provided in an embodiment of the present application;

[0023] Figure 6 is a schematic diagram of a PDSCH transmission provided in an embodiment of the present application;

[0024] Figure 7 is a schematic diagram of another PDSCH transmission provided in an embodiment of the present application;

[0025] Figure 8 is a structural diagram of an information indication device provided in an embodiment of the present application;

[0026] Fig. 9 is a structural diagram of another information indication device provided in an embodiment of the present application;

[0027] Fig.10 is a structural diagram of a terminal provided in an embodiment of the present application;

[0028] Fig.11 It is a structural diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0031] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. However, the following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, although these technologies can also be applied to applications other than NR system applications, such as the 6th Generation (6G) communication system.

[0032] Figure 1 A block diagram of a wireless communication system applicable to the embodiment of the present application is shown. The wireless communication system includes a terminal 11 and a network device 12. Among them, the terminal 11 can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a RedCap UE and other terminal-side devices, wherein the RedCap UE) may include: wearable devices, industrial sensors, video surveillance equipment, etc., and the wearable devices include: bracelets, headphones, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application.

[0033] The network device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0034] In addition, in the embodiments of the present application, it can be applied to scenarios supporting broadcast / multicast features, such as: public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, software delivery over wireless, group communications and IoT applications, etc., which support broadcast / multicast features. Of course, the embodiments of the present application are not limited to this, for example, other unicast scenarios are also possible.

[0035] The information indication method, apparatus, terminal, network device and storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0036] See also Figure 2 , Figure 2 is a flowchart of an information indication method provided in an embodiment of the present application, the method is executed by a terminal, such as Figure 2 As shown, the following steps are included:

[0037] Step 201: Receive DCI, where the DCI is used to indicate at least one of whether a physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0038] The above-mentioned DCI may be sent by a receiving network device, and the above-mentioned DCI may be through the content of the indication bit in the DCI to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel. In addition to indicating the above-mentioned content, the above-mentioned DCI may also indicate or not indicate other content, which is not limited.

[0039] Whether the above physical downlink channel is the last transmission may be whether the current physical downlink channel is the last transmission in the repeated transmission process of the physical downlink channel. In addition, in the embodiment of the present application, the physical downlink channel may refer to a physical downlink channel signal, a physical downlink channel message or a physical downlink channel transmission.

[0040] Whether feedback is required for the physical downlink channel may be whether HARQ-ACK feedback is performed for the physical downlink channel.

[0041] In this embodiment, the physical downlink channel may include at least one of the following:

[0042] PDSCH, physical downlink control channel (Physical downlink control channel, PDCCH).

[0043] Furthermore, the above-mentioned PDSCH and PDCCH can be the PDSCH and PDCCH used for broadcast and multicast services (Multicast Broadcast Service, MBS). Of course, they can also be the PDSCH and PDCCH used for multimedia broadcast and multicast services (Multimedia Broadcast and Multicast Service, MBMS), that is, PDSCH and PDCCH transmitted by broadcast or multicast. There is no limitation on this. For example: they can also be the PDSCH and PDCCH used for unicast services, that is, PDSCH and PDCCH transmitted by unicast.

[0044] In addition, for the PDSCH of MBMS, the PDSCH may be sent through a physical multicast channel (PMCH) in a MBMS single frequency network (Multimedia Broadcast multicast service Single Frequency Network, MBSFN) subframe.

[0045] In addition, the PDCCH may be a PDCCH for releasing a semi-persistent scheduling (Semi-Persistent Scheduling, SPS) PDSCH, or a PDCCH for instructing an attached cell to enter a dormancy state (Scell ​​dormancy), and the like.

[0046] Furthermore, the above-mentioned physical downlink channel may be the current physical downlink channel transmission of the terminal.

[0047] In addition, the above-mentioned DCI is used to indicate whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel. It can be understood that the DCI dynamically indicates whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0048] Step 202: Respond to the DCI.

[0049] This step in response to the DCI may be to determine whether the physical downlink channel is the last transmission and / or to determine whether feedback is required for the physical downlink channel.

[0050] The above-mentioned response DCI may be to determine whether to provide feedback for the above-mentioned physical downlink channel according to the above-mentioned content indicated by the DCI. For example: when the physical downlink channel is the last transmission and / or it is determined that feedback is not required for the physical downlink channel, feedback is not provided for the above-mentioned physical downlink channel; or, when the physical downlink channel is not the last transmission and / or it is determined that feedback is required for the physical downlink channel, feedback is provided for the above-mentioned physical downlink channel.

[0051] Furthermore, since the physical downlink channel is transmitted for the last time and / or it is determined that no feedback is needed for the physical downlink channel, feedback may not be provided for the physical downlink channel, thereby saving terminal power consumption and physical uplink control channel (PUCCH) resources.

[0052] In an embodiment of the present application, the above steps can be used to achieve that, since the DCI indicates at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, the terminal can obtain more information content of the physical downlink channel, and thus respond to the DCI to improve the flexibility of the terminal in responding to the physical downlink channel. That is, the terminal can flexibly respond according to whether the physical downlink channel is the last transmission and / or whether feedback is required for the physical downlink channel, for example, it can determine whether HARQ-ACK feedback is performed for the physical downlink channel.

[0053] As an optional implementation manner, the physical downlink channel includes:

[0054] The physical downlink channel scheduled by the DCI.

[0055] In this implementation, it is possible to indicate in the DCI of the physical downlink channel whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, so as to avoid adding additional DCI, thereby saving transmission resource overhead.

[0056] In addition, in the embodiment of the present application, the above-mentioned physical downlink channel is not limited to the physical downlink channel scheduled by the above-mentioned DCI, for example, it can also be a physical downlink channel scheduled by other DCIs. Further, in the embodiment of the present application, the above-mentioned DCI is not limited to the DCI for scheduling the physical downlink channel, for example, it can also be the DCI for non-scheduled PDSCH.

[0057] As an optional implementation manner, the DCI includes a first indication field, and the first indication field is used to indicate: whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0058] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0059] Among them, the above-mentioned first indication field can be a specific indication field in the DCI for indicating at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, for example: configuring or newly adding the above-mentioned indication field in the DCI defined in the protocol, or modifying the indication function of one or more indication fields.

[0060] The DCI indicates, through the second indication field of the DCI, whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel. At least one of the following may be:

[0061] The second indication field is reused to indicate at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0062] The DCI overhead can be saved by reusing the second indication field indication.

[0063] Of course, the second indication field may not be reused. For example, the indication function of the second indication field may be extended, such as one value among the pre-configured multiple k1s represents that the terminal does not need to generate and feed back the HARQ-ACK of the physical downlink channel.

[0064] In addition, the second indication field may include one or more indication fields.

[0065] For example, the second indication field may include at least one of the following:

[0066] Transmission power control (TPC) field, physical uplink control channel resource indicator (PRI) field and k1 indication field;

[0067] The k1 indication field is an indication of the time domain interval between the physical downlink channel and the corresponding HARQ-ACK feedback, that is, the PDSCH to HARQ-ACK feedback timing.

[0068] In addition, the second indication field may be an invalid indication field in the DCI. For example, the DCI indicates invalid k1 or invalid PRI to indicate to the terminal that the PDSCH is the last transmission or whether the current PDSCH transmission needs HARQ feedback.

[0069] As an optional implementation, a downlink assignment index (DAI) in the DCI does not count the physical downlink channel.

[0070] In this implementation, when the physical downlink channel is transmitted for the last time and / or when feedback on the physical downlink channel is not required, the DAI in the DCI does not count the physical downlink channel. Of course, there is no limitation to this.

[0071] In this implementation, since the DAI in the DCI does not count the physical downlink channel, the terminal can ignore the DAI, so there is no need to feed back its HARQ-ACK, thereby saving power consumption of the terminal.

[0072] As an optional implementation manner, the responding to the DCI includes:

[0073] The physical downlink channel is received, and when the DCI indicates at least one of the last transmission of the physical downlink channel and no feedback is required for the physical downlink channel, HARQ-ACK feedback is not performed for the physical downlink channel.

[0074] The above-mentioned not performing HARQ-ACK feedback for the physical downlink channel may be that no HARQ-ACK feedback is performed in the case of successful or failed decoding of the physical downlink channel, or reception error, etc., thereby saving PUCCH resources and terminal power consumption.

[0075] Optionally, the not performing hybrid automatic repeat request acknowledgment HARQ-ACK feedback for the physical downlink channel includes:

[0076] not generating HARQ-ACK information for the physical downlink channel; or

[0077] Generate HARQ-ACK information of the physical downlink channel, but do not feed back the HARQ-ACK information.

[0078] The above-mentioned generation of the HARQ-ACK information of the physical downlink channel, but not feeding back the HARQ-ACK information may be that, within the feedback time unit corresponding to the PDSCH, when the HARQ-ACK codebook is constructed, the HARQ-ACK of the physical downlink channel is not included in the codebook. After the PDSCH scheduling, if a transmission codebook is triggered once, the terminal may include the HARQ-ACK information of the PDSCH in the once transmitted codebook, or in a certain time unit after the PDSCH scheduling, the terminal is scheduled for HARQ-ACK feedback of other PDSCHs (the other PDSCHs are not indicated as the last transmission and do not need to be fed back for the physical downlink channel, at least one of the above) and the receiving opportunity corresponding to the PDSCH is included in the PDSCH candidate receiving opportunity fed back in the time slot, then the UE includes the HARQ-ACK information of the PDSCH in the codebook.

[0079] Optionally, the codebook configured by the terminal is a dynamic codebook or an enhanced dynamic codebook.

[0080] The dynamic codebook or enhanced dynamic codebook may be a type 2 codebook (type2 HARQ-ACK codebook) or an enhanced type 2 codebook defined in the protocol.

[0081] Optionally, the codebook configured by the terminal is a once-transmitted codebook and in a HARQ-ACK feedback time unit corresponding to the PDSCH, the terminal is not instructed to feed back HARQ-ACK of the once-transmitted codebook.

[0082] The above-mentioned single transmission codebook may be a type-3 HARQ-ACK codebook (type-3 HARQ-ACK codebook) defined in the protocol.

[0083] For example, if the terminal is configured with a dynamic codebook or an enhanced dynamic codebook, the HARQ-ACK information of the physical downlink channel is not generated, or the HARQ-ACK information of the physical downlink channel is not fed back. For example, when the HARQ-ACK codebook is constructed, the HARQ-ACK of the physical downlink channel is not included in the codebook.

[0084] As an optional implementation manner, the responding to the DCI includes:

[0085] In a case where the codebook configured by the terminal is a semi-static codebook or the terminal feedbacks a one shot codebook in the corresponding time unit, HARQ-ACK information of the physical downlink channel is fed back in the semi-static codebook or the one shot codebook.

[0086] The above corresponding time unit may be a time resource for HARQ-ACK feedback.

[0087] The above-mentioned semi-static codebook may be a type-1 HARQ-ACK codebook (type-1 HARQ-ACK codebook) defined in the protocol.

[0088] The above-mentioned single transmission codebook may be a type-3 HARQ-ACK codebook (type-3 HARQ-ACK codebook) defined in the protocol.

[0089] In this implementation, if a semi-static codebook is configured or the corresponding time unit terminal is instructed to feed back a transmission codebook once, HARQ-ACK information of the physical downlink channel is generated. When the HARQ-ACK codebook is constructed, the HARQ-ACK of the physical downlink channel can be included in the codebook.

[0090] Optionally, in this implementation, if a semi-static codebook is configured, if in the feedback time unit corresponding to the PDSCH, the terminal also schedules other PDSCHs or PDCCHs that are not indicated as the last transmission and do not need to provide feedback for at least one of the physical downlink channels, the UE can feedback the HARQ-ACK information corresponding to the PDSCH. Conversely, if the terminal only schedules feedback of the PDSCH that is indicated as the last transmission and does not need to provide feedback for at least one of the physical downlink channels, the UE does not need to feedback HARQ-ACK, that is, the UE does not need to construct a HARQ-ACK codebook and does not need to transmit a PUCCH carrying HARQ-ACK information.

[0091] In this way, feeding back the HARQ-ACK information of the physical downlink channel in the semi-static codebook or the one-time transmission codebook does not increase the overhead of the semi-static codebook or the one-time transmission codebook, because the size of the semi-static codebook or the one-time transmission codebook is fixed, and feeding back the HARQ-ACK information of the physical downlink channel allows the network device to obtain more useful information.

[0092] Furthermore, in MBMS or MBS, since the physical downlink channel of MBMS or MBS is sent to multiple terminals, and the codebook types configured by these multiple terminals may be different, for example, some terminals may be configured with a dynamic codebook, and other terminals may be configured with a semi-static codebook or the corresponding time unit terminal feedback is a one-time transmission codebook, so that the terminal with the dynamic codebook does not need to feedback, and only the terminal configured with a semi-static codebook or the terminal with the corresponding time unit feedback is a one-time transmission codebook feedback, thereby saving PUCCH resources as a whole.

[0093] As an optional implementation manner, the responding to the DCI includes:

[0094] The physical downlink channel is received, and if decoding of the physical downlink channel fails, a discontinuous reception (DRX) retransmission timer is not started.

[0095] In this implementation, when the physical downlink channel is transmitted for the last time and / or feedback for the physical downlink channel is not required, if the physical downlink channel decoding fails, the DRX retransmission timer is not started.

[0096] In this implementation, since the DRX retransmission timer is not started, the power consumption of the terminal can be further saved.

[0097] In the embodiment of the present application, a DCI is received, and the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; and the DCI is responded to. Since the DCI indicates at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, the terminal can obtain more information content of the physical downlink channel, and thus respond to the DCI to improve the flexibility of the terminal in responding to the physical downlink channel, and can also save PUCCH resources and save terminal power consumption.

[0098] See also Figure 3 , Figure 3 is a flowchart of another information indication method provided in an embodiment of the present application, the method is executed by a network device, such as Figure 3 As shown, including:

[0099] Step 301: Send DCI, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0100] Optionally, the physical downlink channel includes at least one of the following:

[0101] Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

[0102] Optionally, the physical downlink channel includes:

[0103] The physical downlink channel scheduled by the DCI.

[0104] Optionally, the DCI includes a first indication field, where the first indication field is used to indicate: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0105] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0106] Optionally, the downlink allocation index DAI in the DCI does not count the physical downlink channel.

[0107] It should be noted that this embodiment is Figure 2 The implementation method of the corresponding network device side in the embodiment shown in the figure can be found in the specific implementation method. Figure 2 The related descriptions of the embodiment shown are not repeated in this embodiment to avoid repeated descriptions. In this embodiment, it can also be determined that the flexibility of the terminal in responding to the physical downlink channel is improved, and PUCCH resources and terminal power consumption can be saved.

[0108] The information indication method provided by the embodiment of the present invention is illustrated below by taking MBS as an example through multiple embodiments:

[0109] Embodiment 1:

[0110] like Figure 4 As shown, the network device schedules the transmission of PDSCH1_1 for MBS data through PDCCH1. At this time, the PDSCH can be the first transmission (i.e., initial transmission) of a transport block (TB) or the Nth transmission, where N>1. After PDSCH1_1, the network device will receive HARQ-ACK feedback from the terminal receiving the MBS service. If the network device receives NACK, the network device schedules the retransmission of the TB. Figure 4The network device schedules PDSCH1_2 through PDCCH2 to retransmit the TB. That is, PDSCH 1_1 and PDSCH 1_2 are different repeated transmissions of the same TB. Figure 4 Terminal 1 (i.e., UE1) is a terminal that accesses the MBS group after PDSCH1_1 and before PDSCH 1-2. Therefore, terminal 1 only receives PDSCH 1_2 and does not receive the transmission before the TB. For terminal 1, it may not be able to correctly decode PDSCH 1_2 due to the redundancy version (RV) or channel conditions. For MBS services, the network device may not infinitely retransmit the TB because individual terminals do not correctly decode the TB (for example, in extreme cases, there are always new terminals accessing, and the newly accessed terminals continue to feedback NACK, and the network device needs to continuously retransmit the same TB). In other words, the network device may not retransmit the TB because terminal 1 feedbacks NACK, so terminal 1 does not need to feedback HARQ-ACK or wait for the retransmission of the TB. Therefore, when scheduling the PDSCH, the network device can indicate that the PDSCH is the last transmission, or indicate that the PDSCH does not require HARQ-ACK feedback. Specifically, the network device may use a unique indication field in the DCI for scheduling PDSCH, such as 1-bit indication information, or use a specific combination of certain fields or status indications, such as indicating through PRI, TPC, DAI and other fields that the terminal is transmitting the PDSCH for the last time, or indicating that the PDSCH does not require HARQ-ACK feedback. Specifically, the network device may indicate in the scheduling PDSCH that the HARQ-ACK of the PDSCH does not need to be fed back. Or through the timing indication field (k1) from PDSCH to HARQ-ACK, one of the multiple k1s configured by the network device indicates that the terminal does not need to generate and feedback the HARQ-ACK of the PDSCH.

[0111] On the terminal side, if the terminal receives a PDSCH, which indicates the last transmission, or indicates that HARQ-ACK feedback is not required, the terminal may not generate HARQ-ACK information for the PDSCH, and does not feedback the HARQ-ACK information for the PDSCH. For example: if the terminal is configured with a type 2 codebook or an enhanced type 2 HARQ-ACK codebook (and a one shot codebook is not configured), the terminal generates the A / N information for the PDSCH, and does not feedback the HARQ-ACK information for the PDSCH, that is, the HARQ-ACK for the PDSCH is not included in the HARQ-ACK codebook.

[0112] If the terminal is configured with type 1 codebook or the terminal feedbacks one shot codebook in the corresponding time unit, the terminal can generate HARQ-ACK for the PDSCH and feedback the A / N information of the PDSCH in the corresponding type 1 codebook or one shot codebook. Among them, if it is a one shot codebook, the terminal will feedback the A / N information of the PDSCH only when the feedback of the one shot codebook is requested. If the one shot codebook is not triggered in the DCI that schedules the PDSCH, that is, if the PDSCH does not trigger the one shot codebook feedback after the terminal receives the PDSCH, the terminal does not need to feedback the A / N of the PDSCH. The terminal can generate the A / N information of the PDSCH (or not generate it, or it is implemented by the terminal). If the terminal is triggered by the one shot codebook, the terminal can feedback the A / N information of the PDSCH at the A / N bit position corresponding to the PDSCH in the one shot codebook (or feedback NACK)

[0113] In addition, if the DCI scheduling PDSCH contains C-DAI and / or T-DAI, the PDSCH may not need to be accumulated, such as Figure 5 As shown, from the perspective of terminal 1, the PDSCH received by terminal 1, where PDSCH2 is before PDSCH 1_2, and its corresponding C-DAI = 1, PDSCH 3 and PDSCH 4 are after PDSCH 1_2, and their C-DAI are 2 and 3 respectively, and these PDSCHs all feedback HARQ-ACK in one time slot. When counting C-DAI, PDSCH 1_2 does not need to be accumulated.

[0114] On the terminal side, the terminal receives the DCI of the PDSCH. If the DCI includes DAI, this DAI does not need to be accumulated for downlink scheduling. The terminal can ignore the DAI indication or the DAI can be used as other indications.

[0115] Embodiment 2:

[0116] In this embodiment, Figure 6, the UE receives PDSCH1, PDSCH 2 and PDSCH 3 at n-3, n-2 and n-1 respectively, where PDSCH 1 and PDSCH 3 are not indicated as the last transmission or do not indicate that HARQ-ACK feedback is not required, PDSCH 2 is indicated as the last transmission or indicates that HARQ-ACK feedback is not required, and according to the PDSCH to HARQ-ACK feedback timing indication (i.e. k1) in their respective corresponding PDCCHs, it can be determined that the HARQ-ACKs corresponding to the three PDSCHs are all fed back in time slot n (if feedback is required). In this embodiment, if the UE is configured with a semi-static codebook (in this case, there may be no DAI indication information in the DCI) or the UE is instructed to feedback a one shot codebook in time slot n, the UE feeds back HARQ-ACK of PDSCH 1, PDSCH 2, and PDSCH 3 in time slot n. If the UE is configured with a dynamic codebook or an enhanced dynamic codebook or is not instructed to feed back a one shot codebook in time slot n, the UE only needs to feed back HARQ-ACK of PDSCH 1 and PDSCH 3 in time slot n, and does not need to feed back HARQ-ACK of PDSCH 2.

[0117] Embodiment 2:

[0118] In this embodiment, Figure 7 In the example, the UE is configured with a semi-static codebook. In time slot n-2, the UE receives PDSCH 1 and is indicated as the last transmission, or is indicated that no HARQ-ACK feedback is required. According to the PDSCH to HARQ-ACK feedback timing indication (i.e. k1) in its PDCCH, it can be determined that the HARQ-ACK corresponding to its PDSCH is fed back in time slot n (if feedback is required). If the UE does not receive other PDSCHs or PDCCHs indicating that it is fed back in time slot n, the UE does not feed back the HARQ-ACK of PDSCH1 in time slot n, and does not transmit the PUCCH carrying HARQ-ACK.

[0119] Embodiment 3:

[0120] Some communication systems (e.g., NR systems) support the DRX function, that is, when the terminal is configured with DRX, the terminal can only not detect the downlink PDCCH and PDSCH at certain times, so as to achieve the purpose of saving power consumption. The terminal can configure a DRX retransmission timer, such as drx-RetransmissionTimer, which is used to start the retransmission timer when the data has not been correctly received (ACK) after the HARQ round trip time (Round Trip Time, RTT), so as to monitor the PDCCH within the timer and receive the retransmitted data. After receiving PDSCH1_2, the above-mentioned terminal 1 did not correctly decode the PDSCH. If the network device indicates that the PDSCH is the last transmission or does not need to feedback HARQ-ACK, the terminal will not start the retransmission timer when it fails to decode the PDSCH.

[0121] The embodiments of the present application can achieve:

[0122] The network device indicates through DCI whether the current PDSCH transmission of the terminal is the last transmission or whether HARQ-ACK feedback is required. If so, the terminal does not need to feedback HARQ-ACK and does not need to start the DRX retransmission timer to reduce unnecessary HARQ-ACK feedback and power consumption of the terminal.

[0123] See also Figure 8 , Figure 8 is a structural diagram of an information indication device provided by an embodiment of the present invention, such as Figure 8 As shown, the information indicating device 800 includes:

[0124] The receiving module 801 is used to receive DCI, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel;

[0125] The response module 802 is configured to respond to the DCI.

[0126] Optionally, the physical downlink channel includes at least one of the following:

[0127] Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

[0128] Optionally, the physical downlink channel includes:

[0129] The physical downlink channel scheduled by the DCI.

[0130] Optionally, the DCI includes a first indication field, where the first indication field is used to indicate: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0131] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0132] Optionally, the downlink allocation index DAI in the DCI does not count the physical downlink channel.

[0133] Optionally, the responding to the DCI includes:

[0134] The physical downlink channel is received, and when the DCI indicates at least one of the last transmission of the physical downlink channel and no feedback is required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK feedback is not performed for the physical downlink channel.

[0135] Optionally, the not performing hybrid automatic repeat request acknowledgment HARQ-ACK feedback for the physical downlink channel includes:

[0136] not generating HARQ-ACK information for the physical downlink channel; or

[0137] Generate HARQ-ACK information of the physical downlink channel, but do not feed back the HARQ-ACK information.

[0138] Optionally, the codebook configured by the terminal is a dynamic codebook or an enhanced dynamic codebook.

[0139] Optionally, the response module 802 is configured to feedback the HARQ-ACK information of the physical downlink channel in the semi-static codebook or the once transmitted codebook when the codebook configured by the terminal is a semi-static codebook or the terminal feedback in the corresponding time unit is a once transmitted codebook.

[0140] Optionally, the response module 802 is used to receive the physical downlink channel, and if the decoding of the physical downlink channel fails, a discontinuous reception DRX retransmission timer is not started.

[0141] The information indication device provided in the embodiment of the present application can achieve Figure 2 To avoid repetition, the various processes in the method embodiment are not described here, and the flexibility of the terminal in responding to the physical downlink channel can be improved.

[0142] It should be noted that the information indication device in the embodiment of the present application can be a device, or a component, an integrated circuit, or a chip in a terminal.

[0143] See also Fig. 9 , Fig. 9is a structural diagram of another information indicating device provided by an embodiment of the present invention, such as Fig. 9 As shown, the information indicating device 900 includes:

[0144] The sending module 901 is used to send DCI, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0145] Optionally, the physical downlink channel includes at least one of the following:

[0146] Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

[0147] Optionally, the physical downlink channel includes:

[0148] The physical downlink channel scheduled by the DCI.

[0149] Optionally, the DCI includes a first indication field, where the first indication field is used to indicate: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0150] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0151] Optionally, the downlink allocation index DAI in the DCI does not count the physical downlink channel.

[0152] The information indication device provided in the embodiment of the present application can achieve Figure 3 To avoid repetition, the various processes in the method embodiment are not described here, and the flexibility of the terminal in responding to the physical downlink channel can be improved.

[0153] It should be noted that the information indication device in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a network device.

[0154] Fig.10 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0155] The terminal 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1008, and a processor 1010 and other components.

[0156] Those skilled in the art will appreciate that the terminal 1000 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.10 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0157] The radio frequency unit 1001 is used to receive downlink control information DCI, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel;

[0158] Processor 1010 is configured to respond to the DCI.

[0159] Optionally, the physical downlink channel includes at least one of the following:

[0160] Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

[0161] Optionally, the physical downlink channel includes:

[0162] The physical downlink channel scheduled by the DCI.

[0163] Optionally, the DCI includes a first indication field, where the first indication field is used to indicate: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0164] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0165] Optionally, the downlink allocation index DAI in the DCI does not count the physical downlink channel.

[0166] Optionally, the responding to the DCI includes:

[0167] The physical downlink channel is received, and when the DCI indicates at least one of the last transmission of the physical downlink channel and no feedback is required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK feedback is not performed for the physical downlink channel.

[0168] Optionally, the not performing hybrid automatic repeat request acknowledgment HARQ-ACK feedback for the physical downlink channel includes:

[0169] not generating HARQ-ACK information for the physical downlink channel; or

[0170] Generate HARQ-ACK information of the physical downlink channel, but do not feed back the HARQ-ACK information.

[0171] Optionally, the codebook configured by the terminal is a dynamic codebook or an enhanced dynamic codebook.

[0172] Optionally, the responding to the DCI includes:

[0173] When the codebook configured by the terminal is a semi-static codebook or the terminal feedbacks a once-transmitted codebook in the corresponding time unit, HARQ-ACK information of the physical downlink channel is fed back in the semi-static codebook or the once-transmitted codebook.

[0174] Optionally, the responding to the DCI includes:

[0175] The physical downlink channel is received, and if the physical downlink channel decoding fails, a discontinuous reception DRX retransmission timer is not started.

[0176] This embodiment can improve the flexibility of the terminal in responding to the physical downlink channel.

[0177] Optionally, an embodiment of the present invention also provides a terminal, including a processor 1010, a memory 1008, and a program or instruction stored in the memory 1008 and executable on the processor 1010. When the program or instruction is executed by the processor 1010, each process of the above-mentioned information indication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0178] See also Fig.11 , Fig.11 1 is a structural diagram of a network device provided by an embodiment of the present invention. The network device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103 and a bus interface, wherein:

[0179] The transceiver 1102 is used to send DCI, where the DCI is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel.

[0180] Optionally, the physical downlink channel includes at least one of the following:

[0181] Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

[0182] Optionally, the physical downlink channel includes:

[0183] The physical downlink channel scheduled by the DCI.

[0184] Optionally, the DCI includes a first indication field, where the first indication field is used to indicate: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or

[0185] The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

[0186] Optionally, the downlink allocation index DAI in the DCI does not count the physical downlink channel.

[0187] This embodiment can improve the flexibility of the terminal in responding to the physical downlink channel.

[0188] The transceiver 1102 is used to receive and send data under the control of the processor 1101, and the transceiver 1102 includes at least two antenna ports.

[0189] exist Fig.11 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 1101 and various circuits of memory represented by memory 1103 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 1102 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different user devices, the user interface 1104 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0190] The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 can store data used by the processor 1101 when performing operations.

[0191] Preferably, an embodiment of the present invention also provides a network side device, including a processor 1101, a memory 1103, and a program or instruction stored in the memory 1103 and executable on the processor 1101. When the program or instruction is executed by the processor 1101, each process of the above-mentioned information indication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0192] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the information indication method on the terminal side provided in the embodiment of the present application are implemented; or, when the program or instruction is executed by a processor, the steps of the information indication method on the network device side provided in the embodiment of the present application are implemented.

[0193] An embodiment of the present application also provides a program product, which is stored in a non-volatile storage medium, and is executed by at least one processor to implement the steps of the information indication method on the terminal side provided in the embodiment of the present application, or the program product is executed by at least one processor to implement the steps of the information indication method on the network device side provided in the embodiment of the present application.

[0194] The processor is a processor in the terminal or network device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0195] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned terminal side information indication method or network device side information indication method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0196] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0197] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0198] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0199] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An information indication method, executed by a terminal, characterized in that: include: Receive downlink control information DCI, where the DCI is used to indicate at least one of whether a physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, wherein the physical downlink channel includes a physical downlink channel scheduled by the DCI; Responding to the DCI; The responding to the DCI includes: The physical downlink channel is received, and when the DCI indicates at least one of that the physical downlink channel is the last transmission and feedback is not required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK feedback is not performed for the physical downlink channel.

2. The method according to claim 1, characterized in that The physical downlink channel includes at least one of the following: Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

3. The method according to claim 1, characterized in that The DCI includes a first indication field, where the first indication field is used to indicate at least one of: whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

4. The method according to claim 1, characterized in that The downlink allocation index DAI in the DCI does not count the physical downlink channel.

5. The method according to claim 1, characterized in that The not performing hybrid automatic repeat request acknowledgment HARQ-ACK feedback for the physical downlink channel includes: not generating HARQ-ACK information for the physical downlink channel; or Generate HARQ-ACK information of the physical downlink channel, but do not feed back the HARQ-ACK information.

6. The method according to claim 5, characterized in that The codebook configured by the terminal is a dynamic codebook or an enhanced dynamic codebook.

7. The method according to any one of claims 1 to 6, characterized in that The responding to the DCI comprises: In a case where the codebook configured by the terminal is a semi-static codebook or the terminal feeds back a one-time transmission codebook, HARQ-ACK information of the physical downlink channel is fed back in the semi-static codebook or the one-time transmission codebook.

8. The method according to any one of claims 1 to 4, characterized in that The responding to the DCI comprises: The physical downlink channel is received, and if the physical downlink channel decoding fails, a discontinuous reception DRX retransmission timer is not started.

9. An information indication method, executed by a network device, characterized in that: include: Sending downlink control information DCI, where the DCI is used to indicate at least one of whether a physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, wherein the physical downlink channel includes a physical downlink channel scheduled by the DCI; Wherein, when the DCI indicates at least one of that the physical downlink channel is the last transmission and feedback is not required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK is not received for the physical downlink channel.

10. The method according to claim 9, characterized in that The physical downlink channel includes at least one of the following: Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

11. The method according to claim 9, characterized in that The DCI includes a first indication field, where the first indication field is used to indicate at least one of: whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel; or The DCI indicates, through the second indication field of the DCI, at least one of whether the physical downlink channel is transmitted for the last time and whether feedback is required for the physical downlink channel.

12. The method according to claim 9, characterized in that The downlink allocation index DAI in the DCI does not count the physical downlink channel.

13. An information indication device, executed by a terminal, characterized in that: include: A receiving module, configured to receive downlink control information DCI, wherein the DCI is used to indicate at least one of whether a physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, wherein the physical downlink channel includes a physical downlink channel scheduled by the DCI; A response module, used for responding to the DCI; The responding to the DCI includes: The physical downlink channel is received, and when the DCI indicates at least one of that the physical downlink channel is the last transmission and feedback is not required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK feedback is not performed for the physical downlink channel.

14. The device according to claim 13, characterized in that The response module is used to receive the physical downlink channel, and when the DCI indicates that the physical downlink channel is the last transmission and at least one of the feedback for the physical downlink channel is not required, hybrid automatic repeat request confirmation HARQ-ACK feedback is not performed for the physical downlink channel.

15. An information indicating device, characterized in that: include: Sending downlink control information DCI, where the DCI is used to indicate at least one of whether a physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel, wherein the physical downlink channel includes a physical downlink channel scheduled by the DCI; Wherein, when the DCI indicates at least one of that the physical downlink channel is the last transmission and feedback is not required for the physical downlink channel, hybrid automatic repeat request confirmation HARQ-ACK is not received for the physical downlink channel.

16. The device according to claim 15, characterized in that The physical downlink channel includes at least one of the following: Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

17. A terminal, characterized in that: include: A memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps in the information indication method according to any one of claims 1 to 8.

18. A network device, characterized in that: include: A memory, a processor, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps in the information indication method as claimed in any one of claims 9 to 12.

19. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps in the information indication method as described in any one of claims 1 to 8 are implemented, or when the program or instruction is executed by the processor, the steps in the information indication method as described in any one of claims 9 to 12 are implemented.

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