CN114337945A - Information indication method, device, terminal, network equipment and storage medium - Google Patents

Abstract

The application provides an information indication method, an information indication device, a terminal, a network device and a storage medium, wherein the method comprises the following steps: receiving DCI, wherein the DCI is used for indicating: whether a physical downlink channel is transmitted for the last time or not and whether feedback needs to be performed on the physical downlink channel or not; responding to the DCI. Since the DCI indicates at least one of whether the physical downlink channel is a last transmission and whether feedback for the physical downlink channel is required. The method and the device can improve the flexibility of the terminal in responding to the physical downlink channel, and can also save PUCCH resources and save power consumption of the terminal.

Description

Information indicating method, apparatus, terminal, network device and storage medium

technical field

The present invention relates to the field of communication technologies, and in particular, to an information indicating method, apparatus, terminal, network device and storage medium.

Background technique

Some physical downlink channels in some communication systems support repeated transmission, for example: physical downlink shared channel (Physical downlink shared channel, PDSCH) repeated transmission. And the terminal provides feedback for these physical downlink channels, for example: Hybrid Automatic Repeat request Acknowledgement (HARQ-ACK) feedback. However, at present, the terminal performs a unified response for all unicast physical downlink shared channels (eg, feedback is performed for each physical downlink channel), so that the terminal has poor flexibility in performing a response to the physical downlink channel.

SUMMARY OF THE INVENTION

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 to perform a response to a physical downlink channel.

In a first aspect, an embodiment of the present application provides an information indication method, which is executed by a terminal, including:

Receive downlink control information (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 needs to be performed on the physical downlink channel;

Respond to the DCI.

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

Send 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 needs to be performed on the physical downlink channel.

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

a receiving module, configured 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 needs to be performed on the physical downlink channel;

A response module for responding to the DCI.

In a fourth aspect, an embodiment of the present application provides an information indicating device, including:

Send 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 needs to be performed on the physical downlink channel.

In a fifth aspect, an embodiment of the present application provides a terminal, including: a memory, a processor, and a program or instruction stored in the memory and executable on the processor, the program or instruction being executed by the processor When executed, the steps in the terminal-side information indication method provided by the embodiment of the present application are implemented.

In a 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, the program or instruction When executed by the processor, the steps in the method for indicating information on the network device side provided by the embodiments of the present application are implemented.

In a seventh aspect, an embodiment of the present application provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the terminal-side information provided by the embodiment of the present application is implemented The steps in the indication method, or, when the program or instruction is executed by the processor, implement the steps in the information indication method on the network device side provided by the embodiments of the present application.

In the embodiment of the present application, 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 respond to the DCI. 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, in response to the DCI, a flexible response can be implemented according to the content indicated by the DCI, thereby improving the terminal's ability to respond to the physical downlink channel. Flexibility of channel execution responses.

Description of drawings

FIG. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied;

2 is a flowchart of an information indication method provided by an embodiment of the present application;

3 is a flowchart of another method for sending information indication provided by an embodiment of the present application;

4 is a schematic diagram of a PDSCH transmission provided by an embodiment of the present application;

5 is a schematic diagram of another PDSCH transmission provided by an embodiment of the present application;

6 is a schematic diagram of a PDSCH transmission provided by an embodiment of the present application;

7 is a schematic diagram of another PDSCH transmission provided by an embodiment of the present application;

8 is a structural diagram of an information indicating device provided by an embodiment of the present application;

9 is a structural diagram of another information indicating device provided by an embodiment of the present application;

FIG. 10 is a structural diagram of a terminal provided by an embodiment of the present application;

FIG. 11 is a structural diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings 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 those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and "first", "second" distinguishes Usually it is a class, and the number of objects is not limited. For example, the first object may be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

It is worth noting that the technologies described in the embodiments of this application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code division Multiple Access (Code Division Multiple Access, CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (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 not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. However, the following description describes a New Radio (NR) system for example purposes, and uses NR terminology in most of the description below, although these techniques are also applicable to applications other than NR system applications, such as 6th generation ( 6th Generation, 6G) communication system.

FIG. 1 shows a block diagram of a wireless communication system to which the embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network device 12 . The terminal 11 may also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may 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), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile Internet Device (Mobile Internet Device, MID) or vehicle-mounted equipment (VUE), pedestrian terminal (PUE), Terminal-side devices such as RedCap UEs, where the RedCap UEs may include: wearable devices, industrial sensors, video surveillance devices, etc., and the wearable devices include: bracelets, headphones, glasses, and the like. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 .

The network equipment 12 may be a base station or a core network, where a base station may be referred to as a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, Transmission and Reception 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 specific technical vocabulary, it should be noted that in the embodiment of this application, only the NR system is used The base station in the example is taken as an example, but the specific type of the base station is not limited.

In addition, the embodiments of the present application can be applied to scenarios that support broadcast/multicast characteristics, such as: public safety and mission critical, V2X applications, transparent IPv4/ IPv6 multicast delivery (transparent IPv4/IPv6 multicast delivery), IPTV, software delivery over wireless, group communications and IoT applications, etc. support scenarios with broadcast/multicast features. Of course, this embodiment of the present application is not limited, for example, other unicast scenarios may also be used.

The information indicating method, apparatus, terminal, network device, and storage medium provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Please refer to FIG. 2. FIG. 2 is a flowchart of an information indication method provided by an embodiment of the present application. The method is executed by a terminal. As shown in FIG. 2, the method includes the following steps:

Step 201: 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 needs to be performed on the physical downlink channel.

The above-mentioned DCI may be sent by the receiving network device, and the above-mentioned DCI may be at least one of whether the physical downlink channel is the last transmission and whether feedback on the physical downlink channel is required through the indication bit content in the DCI. Besides, the above-mentioned DCI may indicate or not indicate other contents in addition to the above-mentioned contents, which is not limited.

Whether the above-mentioned 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 this 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.

The above-mentioned whether to perform feedback on the physical downlink channel may be whether to perform HARQ-ACK feedback on the physical downlink channel.

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

PDSCH, Physical downlink control channel (Physical downlink control channel, PDCCH).

Further, the above-mentioned PDSCH and PDCCH may be PDSCH and PDCCH used for broadcast multicast service (Multicast Broadcast Service, MBS), of course, may also be PDSCH and PDCCH used for multimedia broadcast and multicast service (Multimedia Broadcast and Multicast Service, MBMS) , namely PDSCH and PDCCH transmitted by broadcast or multicast, which is not limited, for example: PDSCH and PDCCH used for unicast service, namely PDSCH and PDCCH transmitted by unicast.

In addition, for the PDSCH of MBMS, the PDSCH may be sent through a physical multicast channel (Physical Multicast Channel, PMCH) in an MBMS single frequency network (Multimedia Broadcastmulticast service Single Frequency Network, MBSFN) subframe.

In addition, the above-mentioned PDCCH may be a PDCCH that releases a semi-persistent scheduling (Semi-Persistent Scheduling, SPS) PDSCH, or a PDCCH that instructs the attached cell to enter a sleep state (Scell dormancy), or the like.

Further, the above-mentioned physical downlink channel may be the current physical downlink channel transmission of the terminal.

In addition, the above-mentioned 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. It can be understood that the DCI dynamically indicates: whether the physical downlink channel is the last transmission and whether At least one item of feedback needs to be performed on the physical downlink channel.

Step 202, responding to the DCI.

This step may be, in response to the DCI, determining whether the physical downlink channel is the last transmission, and/or determining whether feedback is required for the physical downlink channel.

The above-mentioned response DCI may be to determine whether to feed back 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 when it is determined that no feedback is required for the physical downlink channel, no feedback is performed on the physical downlink channel; or, when the physical downlink channel is not the last transmission, and or, when it is determined that the physical downlink channel needs to be fed back, the physical downlink channel is fed back.

Further, when the physical downlink channel is the last transmission, and/or when it is determined that the physical downlink channel does not need to be fed back, the physical downlink channel may not be fed back, so that the power consumption of the terminal and the physical uplink control can be saved. Channel Physical Uplink Control Channel, PUCCH) resource.

In the embodiment of the present application, the above steps can be used to achieve, because 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, so that the terminal can obtain more physical downlink channels. In response to the DCI, in order to improve the flexibility of the terminal to respond to the physical downlink channel, that is, the terminal can determine whether the physical downlink channel is the last transmission and/or whether the physical downlink channel needs to be Feedback flexible response, for example, it can be determined whether to perform HARQ-ACK feedback for the physical downlink channel.

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

The physical downlink channel scheduled by the DCI.

In this embodiment, at least one of indicating whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel can be realized through the DCI of the physical downlink channel, so as to avoid adding additional DCI, thereby saving energy Transmission resource overhead.

In addition, in the embodiment of the present application, the above-mentioned physical downlink channel is not limited to be the above-mentioned physical downlink channel scheduled by DCI, for example, it may also be another physical downlink channel scheduled by DCI. Further, in the embodiment of the present application, the above-mentioned DCI is not limited to be the DCI for scheduling the physical downlink channel, for example, it may also be the DCI for the non-scheduled PDSCH.

As an optional implementation manner, the DCI includes a first indication field, and the first indication field is used to indicate at least one of whether the physical downlink channel is the last transmission and whether feedback on the physical downlink channel is required ;or

The DCI indicates through the second indication field of the DCI: at least one of whether the physical downlink channel is the last transmission and whether feedback needs to be performed on the physical downlink channel.

Wherein, the above-mentioned first indication field may be a specific indication field in the DCI 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. The above-mentioned indication fields are configured or newly added in the defined DCI, or the indication function of one or more indication fields is modified.

The above-mentioned DCI indicates through the second indication field of the DCI: at least one of whether the physical downlink channel is the last transmission and whether feedback is required for the physical downlink channel may be:

By reusing the second indication field, it is indicated: at least one of whether the physical downlink channel is the last transmission and whether feedback needs to be performed on the physical downlink channel.

The overhead of DCI can be saved by reusing the second indication field indication.

Of course, it is also not necessary to reuse the second indication field to indicate, for example, the indication function of the second indication field can be extended, for example, one value in the pre-configured multiple k1 indicates that the terminal does not need to generate and feed back the HARQ-ACK of the physical downlink channel .

In addition, the above-mentioned second indication field may include one or more indication fields.

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

Transmission power control (transmission power control, TPC) field, physical uplink control channel resource indicator (PUCCH resource indicator, PRI) field and k1 indication field;

Wherein, the k1 indication field is an indication indicating the time domain interval between the physical downlink channel and the corresponding HARQ-ACK feedback, that is, the PDSCH to HARQ-ACK feedback timing.

In addition, the second indication field may be an invalid indication field in the DCI. For example, by indicating invalid k1 or invalid PRI in the DCI, it indicates to the terminal that the PDSCH is the last transmission or whether the current PDSCH transmission needs to be fed back with HARQ.

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

In this embodiment, the DAI in the DCI may not count the physical downlink channel when the physical downlink channel is the last transmission, and/or the physical downlink channel does not need to be fed back. This is not limited.

In this embodiment, since the DAI in the DCI does not count the physical downlink channel, the terminal can ignore the DAI, and thus does not need to feed back its HARQ-ACK, thereby saving the power consumption of the terminal.

As an optional implementation manner, the response to the DCI includes:

Receive the physical downlink channel, and in the case that the DCI indicates that the physical downlink channel is the last transmission and does not need to perform feedback on the physical downlink channel at least one of the conditions, do not perform HARQ for the physical downlink channel- ACK feedback.

Wherein, the above-mentioned not performing HARQ-ACK feedback for the physical downlink channel may be that HARQ-ACK feedback is not performed in the case that the above-mentioned physical downlink channel decoding succeeds or fails decoding, or receives errors, etc., thereby saving PUCCH resources and saving Terminal power consumption.

Optionally, the HARQ-ACK feedback not to perform HARQ-ACK feedback for the physical downlink channel includes:

do not generate HARQ-ACK information for the physical downlink channel; or

HARQ-ACK information of the physical downlink channel is generated, but the HARQ-ACK information is not fed back.

The above generation of the HARQ-ACK information of the physical downlink channel, but not feeding back the HARQ-ACK information may be, in the feedback time unit corresponding to the PDSCH, when the HARQ-ACK codebook is constructed, the HARQ of the physical downlink channel. - ACK is not included in the codebook. After PDSCH scheduling, if a transmission codebook is triggered once, the terminal can include the HARQ-ACK information of the PDSCH in the transmission codebook, or in a certain time unit after PDSCH scheduling, the terminal is scheduled with other HARQ-ACK feedback of PDSCH (at least one of the other PDSCH is not indicated as the last transmission and does not need to be fed back for the physical downlink channel) and the receiver corresponding to the PDSCH will be included in the time slot feedback If there is a PDSCH candidate reception opportunity, the UE includes the HARQ-ACK information of the PDSCH in the codebook.

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

The above 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.

Optionally, the codebook configured by the terminal is a one-time transmission codebook, and in the HARQ-ACK feedback time unit corresponding to the PDSCH, the terminal is not instructed to feed back the HARQ-ACK of the one-time transmission codebook.

The above-mentioned one-time transmission codebook may be a type-3 HARQ-ACK codebook (type-3 HARQ-ACK codebook) defined in the protocol.

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, such as the HARQ-ACK codebook During construction, the HARQ-ACK of the physical downlink channel is not included in the codebook.

As an optional implementation manner, the response to the DCI includes:

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

The above-mentioned corresponding time unit may be a time resource for HARQ-ACK feedback.

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

The above-mentioned one-time transmission codebook may be a type-3 HARQ-ACK codebook (type-3 HARQ-ACK codebook) defined in the protocol.

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

Optionally, in this embodiment, if a semi-static codebook is configured, if in the feedback time unit corresponding to the PDSCH, the terminal also schedules other transmissions that are not indicated as the last transmission and do not need to be targeted for the physical downlink. channel to feed back at least one PDSCH or PDCCH, the UE can feed back the HARQ-ACK information corresponding to the PDSCH, on the contrary, if the terminal only schedules the feedback that is indicated as the last transmission and does not need to be directed to the physical downlink channel If the PDSCH of at least one item of feedback is performed, the UE does not need to feed back the HARQ-ACK, that is, the UE does not need to construct a HARQ-ACK codebook, and does not need to transmit the PUCCH carrying the HARQ-ACK information.

In this way, the HARQ-ACK information of the physical downlink channel is fed back in the semi-static codebook or the one-time transmission codebook without increasing 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 The fixed and feedback HARQ-ACK information of the physical downlink channel allows network equipment to obtain more useful information.

Further, in MBMS or MBS, since the physical downlink channel of MBMS or MBS is sent to multiple terminals, the codebook types configured by these multiple terminals may be different. Some terminals may be configured with a semi-static codebook or the corresponding time unit terminal feeds back a transmit codebook, so the terminal of the dynamic codebook does not need feedback, only the configured semi-static codebook or the corresponding time unit terminal feeds back once. Codebook feedback is transmitted so that PUCCH resources can be saved as a whole.

As an optional implementation manner, the response to the DCI includes:

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

In this embodiment, when the physical downlink channel is the last transmission, and/or no feedback is required for the physical downlink channel, if the decoding of the physical downlink channel fails, the DRX retransmission timer is not started.

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

In the embodiment of the present application, 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 respond to the DCI. 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 respond to the DCI in this way, so as to improve the performance of the terminal. The flexibility of the response to the physical downlink channel can also save PUCCH resources and save power consumption of the terminal.

Please refer to FIG. 3. FIG. 3 is a flowchart of another information indication method provided by an embodiment of the present application. The method is executed by a network device, as shown in FIG. 3, including:

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 needs to be performed on the physical downlink channel.

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

Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

Optionally, the physical downlink channel includes:

The physical downlink channel scheduled by the DCI.

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 needs to be performed on 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 the last transmission and whether feedback needs to be performed on the physical downlink channel.

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

It should be noted that this embodiment is an implementation on the network device side corresponding to the embodiment shown in FIG. 2 , and reference may be made to the relevant description of the embodiment shown in FIG. 2 for the specific implementation, so as to avoid repeated descriptions. This embodiment will not be repeated here. In this embodiment, it can also be determined that the flexibility of the terminal to perform a response to the physical downlink channel can be improved, and PUCCH resources can also be saved, and the power consumption of the terminal can be saved.

The following uses the MBS to illustrate the information indication method provided by the embodiment of the present invention through multiple embodiments:

Example 1:

As shown in FIG. 4 , the network device schedules the transmission of PDSCH1_1 for transmitting MBS data through PDCCH1. At this time, the PDSCH may be the first transmission (ie, initial transmission) of a certain transport block (TB), or it may be the Nth transmission. transmissions, where N>1. After PDSCH1_1, the network device will receive the 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. In Figure 4, the 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. In FIG. 4, terminal 1 (ie, 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 be Due to reasons such as redundancy version (Redundancy Version, RV) or channel conditions, PDSCH 1_2 cannot be decoded correctly. As for the MBS service, the network device may not retransmit the TB indefinitely because individual terminals do not decode the TB correctly (for example, in extreme cases, there are always new terminals accessing, and the newly accessed terminals continuously feedback NACK, and the network device you need to keep retransmitting the same TB). That is, the network device may not retransmit the TB because the terminal 1 feeds back a NACK, so the terminal 1 may not need to feed back the HARQ-ACK, nor wait for the retransmission of the TB. Therefore, when scheduling the PDSCH, the network device may indicate that the PDSCH is the last transmission, or indicate that the PDSCH does not require HARQ-ACK feedback. Specifically, the network device can use a specific indication field indication, such as 1-bit indication information, in the DCI scheduling PDSCH, or use a specific combination or state indication of some fields, such as PRI, TPC, DAI and other fields to indicate the PDSCH to the terminal. It is the last transmission, or indicates that the PDSCH does not require HARQ-ACK feedback. Specifically, the network device may indicate that it does not need to feed back the HARQ-ACK of the PDSCH when scheduling the PDSCH. Or through the timing indication field (k1) from PDSCH to HARQ-ACK, one value in multiple k1 configured by the network device indicates that the terminal does not need to generate and feed back the HARQ-ACK of the PDSCH.

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 the HARQ-ACK information of the PDSCH and not feed back the HARQ-ACK information of the PDSCH. . For example: if the terminal is configured with a type 2 codebook or an enhanced type 2 HARQ-ACK codebook (and no one shot codebook is configured), the terminal generates the A/N information of the PDSCH and does not feed back the HARQ-ACK information of the PDSCH, that is, the The HARQ-ACK of PDSCH is not included in the HARQ-ACK codebook.

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

In addition, if there is C-DAI and or T-DAI in the DCI that schedules the PDSCH, it is not necessary to accumulate the PDSCH. As shown in FIG. 5 , it is the PDSCH received by the terminal 1 from the perspective of the terminal 1, of which PDSCH2 is in the Before PDSCH 1_2, its corresponding C-DAI=1, PDSCH 3 and PDSCH 4 after PDSCH 1_2, its C-DAI is 2 and 3 respectively, and these PDSCHs are fed back HARQ-ACK in one time slot, C-DAI is in When counting, PDSCH 1_2 does not need to be accumulated.

On the terminal side, the terminal receives the DCI of the PDSCH. If the DCI contains DAI, the DAI does not need to be accumulated for downlink scheduling, and the terminal can ignore the DAI indication or the DAI can be used as other indications.

Example 2:

This embodiment is shown in Figure 6. The UE receives PDSCH1, PDSCH 2 and PDSCH 3 at n-3, n-2, and n-1 respectively, wherein PDSCH 1 and PDSCH 3 are not indicated as the last transmission or do not indicate that HARQ-ACK is not required Feedback, PDSCH 2 indicates that it is the last transmission or indicates that HARQ-ACK feedback is not required, and according to the PDSCH to HARQ-ACK feedback timing indication (ie k1) in their respective corresponding PDCCHs, it can be determined that the HARQ-ACK corresponding to the three PDSCHs are all in Slot n feedback (if feedback is required). In this embodiment, if the UE is configured with a semi-static codebook (there may be no DAI indication information in the DCI at this time) or the UE is instructed to feed back the one shot codebook in time slot n, the UE feeds back PDSCH 1, PDSCH in time slot n 2 and HARQ-ACK of PDSCH 3, if the dynamic codebook or enhanced dynamic codebook configured by the UE or is not instructed to feed back the one shot codebook in time slot n, the UE only needs to feed back the HARQ of PDSCH 1 and PDSCH3 in time slot n -ACK instead of HARQ-ACK for PDSCH 2.

Example 2:

In this embodiment, as shown in FIG. 7 , the UE is configured with a semi-static codebook, and in time slot n-2, the UE receives PDSCH 1 and is indicated as the last transmission, or indicated that no HARQ-ACK feedback is required. According to the PDSCH to HARQ-ACK feedback timing indication (ie 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), and the UE has not received other PDSCH or PDCCH indicating that it is at the time Slot n feedback, the UE does not feed back the HARQ-ACK of PDSCH1 in slot n, and does not transmit the PUCCH carrying the HARQ-ACK.

Example 3:

Some communication systems (eg, NR systems) support the DRX function, that is, after the terminal is configured with DRX, the terminal may not detect the downlink PDCCH and PDSCH only at certain times, so as to achieve the purpose of saving power consumption. The terminal can configure the 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 delay (Round Trip Time, RTT). The PDCCH is monitored internally, and retransmission data is received. After the above-mentioned terminal 1 receives PDSCH1_2, it fails to decode the PDSCH correctly. If the network device indicates that the PDSCH is the last transmission or does not need to feed back HARQ-ACK, the terminal does not start the retransmission timer when decoding the PDSCH fails.

The embodiment of the present application can realize:

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 feed back HARQ-ACK and does not need to start the DRX retransmission timer to reduce unnecessary HARQ-ACK feedback and power consumption.

Please refer to FIG. 8. FIG. 8 is a structural diagram of an information indication apparatus provided by an embodiment of the present invention. As shown in FIG. 8, the information indication apparatus 800 includes:

A receiving module 801, configured 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 needs to be performed on the physical downlink channel;

A response module 802, configured to respond to the DCI.

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

Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

Optionally, the physical downlink channel includes:

The physical downlink channel scheduled by the DCI.

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 needs to be performed on 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 the last transmission and whether feedback needs to be performed on the physical downlink channel.

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

Optionally, the response to the DCI includes:

Receive the physical downlink channel, and in the case that the DCI indicates that the physical downlink channel is the last transmission and does not require at least one of feedback for the physical downlink channel, do not perform hybrid automatic for the physical downlink channel The retransmission request acknowledges the HARQ-ACK feedback.

Optionally, the HARQ-ACK feedback not to perform HARQ-ACK feedback for the physical downlink channel includes:

do not generate HARQ-ACK information for the physical downlink channel; or

HARQ-ACK information of the physical downlink channel is generated, but the HARQ-ACK information is not fed back.

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

Optionally, the response module 802 is configured to, in the case that the codebook configured by the terminal is a semi-static codebook or the one-time transmission codebook fed back by the terminal corresponding to the time unit, in the case of the semi-static codebook or the The HARQ-ACK information of the physical downlink channel is fed back in the one-time transmission codebook.

Optionally, the response module 802 is configured to receive the physical downlink channel, and if the decoding of the physical downlink channel fails, do not start the discontinuous reception DRX retransmission timer.

The information indicating device provided in this embodiment of the present application can implement each process in the method embodiment of FIG. 2 , which is not repeated here to avoid repetition, and can improve the flexibility of the terminal to perform a response to the physical downlink channel.

It should be noted that the information indicating device in this embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal.

Please refer to FIG. 9. FIG. 9 is a structural diagram of another information indication apparatus provided by an embodiment of the present invention. As shown in FIG. 9, the information indication apparatus 900 includes:

The sending module 901 is configured 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 needs to be performed on the physical downlink channel.

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

Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

Optionally, the physical downlink channel includes:

The physical downlink channel scheduled by the DCI.

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 needs to be performed on 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 the last transmission and whether feedback needs to be performed on the physical downlink channel.

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

The information indicating device provided in the embodiment of the present application can implement each process in the method embodiment of FIG. 3 , which is not repeated here to avoid repetition, and can improve the flexibility of the terminal to perform a response to the physical downlink channel.

It should be noted that, the information indicating device in this embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a network device.

FIG. 10 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

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, a processor 1010 and other components .

Those skilled in the art can understand that the terminal 1000 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 1010 through a power management system, so as to manage charging, discharging, and power consumption through the power management system management and other functions. The structure of the electronic device shown in FIG. 10 does not constitute a limitation on the electronic device, and the electronic device may include more or less components than the one shown, or combine some components, or arrange different components, which will not be repeated here. .

The radio frequency unit 1001 is configured 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 needs to be performed on the physical downlink channel;

The processor 1010 is configured to respond to the DCI.

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

Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

Optionally, the physical downlink channel includes:

The physical downlink channel scheduled by the DCI.

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 needs to be performed on 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 the last transmission and whether feedback needs to be performed on the physical downlink channel.

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

Optionally, the response to the DCI includes:

Receive the physical downlink channel, and in the case that 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, do not perform hybrid automatic for the physical downlink channel The retransmission request acknowledges the HARQ-ACK feedback.

Optionally, the HARQ-ACK feedback not to perform HARQ-ACK feedback for the physical downlink channel includes:

do not generate HARQ-ACK information for the physical downlink channel; or

HARQ-ACK information of the physical downlink channel is generated, but the HARQ-ACK information is not fed back.

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

Optionally, the response to the DCI includes:

In the case that the codebook configured by the terminal is a semi-static codebook or the one-time transmission codebook fed back by the terminal corresponding to the time unit is fed back the physical downlink channel in the semi-static codebook or the one-time transmission codebook the HARQ-ACK information.

Optionally, the response to the DCI includes:

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

This embodiment can improve the flexibility of the terminal to perform a response to the physical downlink channel.

Optionally, an embodiment of the present invention further provides a terminal, including a processor 1010, a memory 1008, a program or instruction stored in the memory 1008 and executable on the processor 1010, and the program or instruction is executed by the processor 1010. During execution, each process of the above information indicating method embodiment is implemented, and the same technical effect can be achieved. In order to avoid repetition, details are not described here.

Referring to FIG. 11, FIG. 11 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, where:

The transceiver 1102 is configured 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 needs to be performed on the physical downlink channel.

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

Physical downlink shared channel PDSCH, physical downlink control channel PDCCH.

Optionally, the physical downlink channel includes:

The physical downlink channel scheduled by the DCI.

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 needs to be performed on 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 the last transmission and whether feedback needs to be performed on the physical downlink channel.

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

This embodiment can improve the flexibility of the terminal to perform a response to the physical downlink channel.

The transceiver 1102 is used for receiving and transmitting data under the control of the processor 1101, and the transceiver 1102 includes at least two antenna ports.

In FIG. 11 , the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1101 and various circuits of memory represented by memory 1103 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, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 1102 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 1104 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.

Preferably, an embodiment of the present invention further provides a network-side device, including a processor 1101, a memory 1103, a program or an instruction stored in the memory 1103 and executable on the processor 1101, the program or instruction being executed by the processor When 1101 is executed, each process of the above-mentioned information indicating method embodiment is implemented, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.

Embodiments of the present application further provide a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the information indication method on the terminal side provided by the embodiment of the present application is implemented. or, when the program or instruction is executed by the processor, the steps in the method for indicating information on the network device side provided by the embodiments of the present application are implemented.

The embodiments of the present application further provide a program product, the program product is stored in a non-volatile storage medium, and the program product is executed by at least one processor to implement the terminal-side information indication method provided by the embodiments of the present application or, the program product is executed by at least one processor to implement the steps in the method for indicating information on the network device side provided by the embodiments of the present application.

Wherein, the processor is the processor in the terminal or the network device described in the foregoing embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or an instruction to implement the above-mentioned terminal-side information indication method Or the information on the network device side indicates each process of the method embodiment, and can achieve the same technical effect, and to avoid repetition, details are not described here.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip, or the like.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in the reverse order depending on the functions involved. To perform functions, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to some examples may be combined in other examples.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in a part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims (22)

1. An information indication method executed by a terminal, comprising:

receiving Downlink Control Information (DCI), wherein the DCI is used for indicating: whether a physical downlink channel is transmitted for the last time or not and whether feedback needs to be performed on the physical downlink channel or not;

responding to the DCI.

2. The method of claim 1, wherein the physical downlink channel comprises at least one of:

a physical downlink shared channel PDSCH and a physical downlink control channel PDCCH.

3. The method of claim 1, wherein the physical downlink channel comprises at least one of:

and the physical downlink channel scheduled by the DCI.

4. The method of claim 1, wherein the DCI comprises a first indication field to indicate: whether a physical downlink channel is transmitted for the last time or not and whether feedback needs to be performed on the physical downlink channel or not; or

The DCI indicates, through a second indication field of the DCI: whether a physical downlink channel is a last transmission and whether feedback needs to be performed for the physical downlink channel.

5. The method of claim 1, wherein a Downlink Assignment Index (DAI) in the DCI does not count the physical downlink channels.

6. The method of any of claims 1-5, wherein the responding to the DCI comprises:

and receiving the physical downlink channel, and not performing hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback on the physical downlink channel under the condition that the DCI indicates that the physical downlink channel is transmitted for the last time and does not need to perform feedback on the physical downlink channel.

7. The method of claim 6, wherein the not performing hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for the physical downlink channel comprises:

not generating HARQ-ACK information of the physical downlink channel; or

And generating HARQ-ACK information of the physical downlink channel, but not feeding back the HARQ-ACK information.

8. The method of claim 7, wherein the codebook configured by the terminal is a dynamic codebook or an enhanced dynamic codebook.

9. The method of any of claims 1-5, wherein the responding to the DCI comprises:

and under the condition that the codebook configured by the terminal is a semi-static codebook or a primary transmission codebook is fed back by the terminal, feeding back HARQ-ACK information of the physical downlink channel in the semi-static codebook or the primary transmission codebook.

10. The method of any of claims 1-5, wherein the responding to the DCI comprises:

and receiving the physical downlink channel, and if the decoding of the physical downlink channel fails, not starting a Discontinuous Reception (DRX) retransmission timer.

11. An information indication method, performed by a network device, comprising:

sending Downlink Control Information (DCI), wherein the DCI is used for indicating: whether a physical downlink channel is a last transmission and whether feedback needs to be performed for the physical downlink channel.

12. The method of claim 11, wherein the physical downlink channel comprises at least one of:

a physical downlink shared channel PDSCH and a physical downlink control channel PDCCH.

13. The method of claim 11, wherein the physical downlink channel comprises:

and the physical downlink channel scheduled by the DCI.

14. The method of claim 11, wherein the DCI comprises a first indication field to indicate: whether a physical downlink channel is transmitted for the last time or not and whether feedback needs to be performed on the physical downlink channel or not; or

The DCI indicates, through a second indication field of the DCI: whether a physical downlink channel is a last transmission and whether feedback needs to be performed for the physical downlink channel.

15. The method of claim 11, wherein a Downlink Assignment Index (DAI) in the DCI does not count the physical downlink channels.

16. An information indicating apparatus, executed by a terminal, comprising:

a receiving module, configured to receive downlink control information DCI, where the DCI is used to indicate: whether a physical downlink channel is transmitted for the last time or not and whether feedback needs to be performed on the physical downlink channel or not;

a response module to respond to the DCI.

17. The apparatus of claim 16, wherein the response module is configured to receive the physical downlink channel and not perform hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for the physical downlink channel if the DCI indicates that the physical downlink channel is at least one of last transmitted and no feedback is needed for the physical downlink channel.

18. An information indicating device, comprising:

sending Downlink Control Information (DCI), wherein the DCI is used for indicating: whether a physical downlink channel is a last transmission and whether feedback needs to be performed for the physical downlink channel.

19. The apparatus of claim 18, wherein the physical downlink channel comprises at least one of:

a physical downlink shared channel PDSCH and a physical downlink control channel PDCCH.

20. A terminal, comprising: memory, a processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps in the information indication method as claimed in any one of claims 1 to 10.

21. A network device, comprising: memory, processor and program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps in the information indication method as claimed in any one of claims 11 to 15.

22. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implements the steps in the information indication method according to any one of claims 1 to 10, or which, when executed by a processor, implements the steps in the information indication method according to any one of claims 11 to 15.

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