Data transmission method, communication apparatus, and storage medium

Abstract

The present disclosure provides a data transmission method, an apparatus, and a storage medium. The method comprises: a first node sends HARQ-ACK feedback information to a second node, wherein the HARQ-ACK feedback information at least comprises first HARQ-ACK feedback information corresponding to a first physical shared channel, and the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before the first physical shared channel is decoded.

Description

Data transmission method, communication device and storage medium

[0001] This disclosure claims priority to Chinese patent application No. 202410039773.4, filed on January 9, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a data transmission method, a communication device, and a storage medium. Background Art

[0003] In related technologies, in order to determine whether the terminal has correctly received the downlink transmission, the base station requires the terminal to feedback the hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback information of the downlink transmission to the base station. This HARQ-ACK feedback mechanism is an indispensable part of wireless communications, especially in systems such as long-term evolution (LTE) and fifth-generation mobile communication technology (5G). For example, if a downlink transmission is correctly received, the HARQ-ACK feedback information corresponding to the downlink transmission is an acknowledgment (ACK); otherwise, the HARQ-ACK feedback information corresponding to the downlink transmission is a negative acknowledgement (NACK). Summary of the Invention

[0004] The present disclosure provides a data transmission method, a communication device, and a storage medium. The technical solution of the present disclosure is as follows:

[0005] In one aspect, an embodiment of the present disclosure provides a data transmission method, applied to a first node, the method comprising:

[0006] HARQ-ACK feedback information is sent, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, where the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0007] On the other hand, an embodiment of the present disclosure provides a data transmission method, applied to a second node, the method comprising:

[0008] HARQ-ACK feedback information is received, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, where the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0009] In another aspect, an embodiment of the present disclosure provides a data transmission device, applied to a first node, the data transmission device including:

[0010] A communication module is configured to send HARQ-ACK feedback information, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, where the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0011] In another aspect, an embodiment of the present disclosure provides a communication device, applied to a second node, wherein the data transmission device includes:

[0012] A communication module is configured to receive HARQ-ACK feedback information, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, where the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0013] On the other hand, an embodiment of the present disclosure provides a communication device, including: a memory and a processor; the memory and the processor are coupled; the memory is used to store computer program instructions executable by the processor; and the data transmission method of any of the above aspects is implemented when the processor executes the computer program instructions.

[0014] On the other hand, an embodiment of the present disclosure provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed on a computer (such as a communication device or a data transmission device), the data transmission method of any of the above aspects is implemented.

[0015] On the other hand, an embodiment of the present disclosure provides a computer program product, which includes computer program instructions, and when the computer program instructions are executed, implements the data transmission method in any of the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the architecture of a communication system according to some embodiments of the present disclosure.

[0017] FIG2 is an interactive flow chart of a data transmission method according to some embodiments of the present disclosure.

[0018] FIG3 is a block diagram of a data transmission device according to some embodiments of the present disclosure.

[0019] FIG4 is a block diagram of another data transmission device according to some embodiments of the present disclosure.

[0020] FIG5 is a block diagram of a communication device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0022] In the description of the present disclosure, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: only A, only B, and A and B. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0023] It should be noted that in this disclosure, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this disclosure as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts by way of example.

[0024] In related technologies, to determine whether a terminal has correctly received a downlink transmission (including the physical downlink shared channel and the physical downlink control channel), the base station requires the terminal to provide HARQ-ACK feedback information for the downlink transmission to the base station. For example, if the downlink transmission is correctly received, the HARQ-ACK information is ACK; otherwise, the HARQ-ACK information is NACK.

[0025] In related technologies, a terminal needs to decode a physical downlink shared channel (PDSCH) and provide the corresponding HARQ-ACK feedback information to the base station. This process requires a certain amount of processing time. For example, it takes a certain amount of time, t, from the end of the PDSCH to the end of the HARQ-ACK feedback information transmission. This time t is related not only to the terminal's decoding capabilities, but also to the frame structure of the communication system. For example, under the time division duplex (TDD) frame structure, after receiving the PDSCH, the terminal needs to obtain an uplink time slot to provide HARQ-ACK feedback information to the base station, so a longer time is required.

[0026] The following introduces the currently available HARQ-ACK feedback mechanism.

[0027] 1. HARQ-ACK codebook mechanism: 1 bit of HARQ-ACK corresponds to one PDSCH or one physical downlink control channel (PDCCH) (PDCCH that is required to feedback HARQ-ACK, such as PDCCH release). In the new radio (NR), in order to reduce the number of HARQ-ACK transmissions on the physical uplink control channel (PUCCH), the HARQ-ACK codebook technology is introduced. For example, the base station and the terminal agree that if the HARQ-ACK information bits of one or more PDSCHs of the terminal are respectively indicated to be transmitted in the same time slot, the HARQ-ACK feedback information bits form a HARQ-ACK codebook, and the terminal transmits the HARQ-ACK codebook through a PUCCH resource in the slot. This mechanism can effectively reduce the number of HARQ-ACK PUCCH transmissions, thereby improving the efficiency of the system. However, this mechanism also has disadvantages. For example, some HARQ-ACK feedback information may not be transmitted as early as possible.

[0028] 2. HARQ-ACK bundling mechanism: This mechanism is to bundle multiple HARQ-ACK feedback information bits into one bit through an "AND" operation, thereby reducing the number of HARQ-ACK feedback information bits and reducing PUCCH resources. However, this mechanism is carried out through a predetermined configuration. For example, if a terminal is configured to execute this mechanism, then the terminal will always bundle multiple HARQ-ACK feedback information bits into 1 bit in subsequent HARQ-ACK feedback information transmissions, and then transmit this 1 bit to the base station. Obviously, the disadvantages of this mechanism are also obvious. For example, if a NACK occurs, the PDSCHs corresponding to the multiple HARQ-ACK feedback information bits need to be retransmitted, regardless of whether these PDSCHs are received correctly. Ultimately, the efficiency of the system will be reduced due to the additional retransmission of PDSCHs.

[0029] 3. NACK-only feedback mechanism: In this mechanism, if the terminal does not correctly receive a PDSCH, it provides the corresponding NACK information to the base station. Otherwise, the terminal does not provide HARQ-ACK feedback information. This mechanism can reduce the number of HARQ-ACK feedback information transmissions because the probability of a PDSCH being correctly decoded is very high.

[0030] 4. Enable / disable HARQ-ACK feedback mechanism: The base station and the terminal determine whether to feedback HARQ-ACK feedback information for a PDSCH through radio resource control (RRC) configuration or downlink control information (DCI) indication. That is, the base station can configure or indicate not to provide HARQ-ACK feedback information for a PDSCH, thereby reducing the number of HARQ-ACK feedback information bits and even reducing the number of HARQ-ACK feedback information transmissions. This mechanism has certain reliability risks. For example, the base station instructs the terminal not to provide HARQ-ACK feedback information for a PDSCH, but the terminal does not correctly receive the PDSCH. Once this happens, the PDSCH will not be retransmitted at the physical layer.

[0031] Normally, the accuracy of a PDSCH transmission is above 90%, that is, in most cases, the terminal has actually received the PDSCH correctly, but it still needs to provide HARQ-ACK feedback information to the base station. Obviously, it is necessary to consider reducing unnecessary HARQ-ACK feedback information transmission.

[0032] Based on this, the present disclosure provides a data transmission method, comprising: a first node sending HARQ-ACK feedback information to a second node, the HARQ-ACK feedback information including at least first HARQ-ACK feedback information corresponding to a first physical shared channel, the first HARQ-ACK feedback information being HARQ-ACK feedback information determined before decoding the first physical shared channel. Because the corresponding HARQ-ACK feedback information can be obtained without decoding the first physical shared channel, and the HARQ-ACK feedback information is provided to the second node, HARQ-ACK information feedback time is shortened and HARQ-ACK feedback efficiency is improved.

[0033] The data transmission method provided by the embodiments of the present disclosure can be applied to systems of various communication formats. For example, the data transmission method provided by the embodiments of the present disclosure can be applied to systems including, but not limited to, LTE systems, various versions based on LTE evolution, 5G systems, and other communication systems. In addition, the data transmission method provided by the embodiments of the present disclosure can also be applied to future-oriented communication systems (such as 6G communication systems).

[0034] The network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiment of the present disclosure may include at least a first communication node and a second communication node. It should be understood that in this embodiment, in the downlink, the first communication node may be a network side device (for example, including but not limited to a base station), and the second communication node may be a terminal side device (for example, including but not limited to a terminal). Of course, in the uplink, the first communication node may also be a terminal side device, and the second communication node may also be a network side device. In the device-to-device communication between the two communication nodes, the first communication node and the second communication node may both be a base station or a terminal. The first communication node and the second communication node may be referred to as the first node and the second node, respectively.

[0035] In some embodiments, taking the first communication node as a terminal and the second communication node as a base station as an example, as shown in Figure 1, an embodiment of the present disclosure provides a communication system, which includes a terminal 10 and a base station 20. The terminal 10 and the base station 20 can be one or more, and the embodiment of the present disclosure does not limit the number.

[0036] In some embodiments, base station 20 provides wireless access services to terminal 10. A base station 20 provides at least one service coverage area (also referred to as a cell). Terminal 10 entering this area can communicate with base station 20 via wireless signals to receive the wireless access services provided by base station 20.

[0037] In some embodiments, the base station 20 can be a base station or an evolved base station (eNB or eNodeB) in long term evolution (LTE), long term evolution advanced (LTEA), a base station device in a 5G network, or a base station in a future communication system, etc. The base station 20 can include various macro base stations, micro base stations, home base stations, wireless remote devices, reconfigurable intelligent surfaces (RISs), routers, relays, multiple transmission reception points (TRP), wireless fidelity (WIFI) devices and other network side devices.

[0038] In some embodiments, the terminal 10 may be a device with wireless transceiver capabilities. The terminal 10 may be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present disclosure do not limit the application scenarios. The terminal 10 may sometimes also be referred to as a user, user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent or a UE device, etc., and the embodiments of the present disclosure do not limit this.

[0039] It should be noted that Figure 1 is only an exemplary framework diagram. The number of devices included in Figure 1 and the names of each device are not restricted. In addition to the devices shown in Figure 1, the communication system may also include other devices, such as core network devices.

[0040] The embodiments of the present disclosure do not limit the application scenarios. The system architecture and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art will appreciate that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0041] The present disclosure provides a data transmission method. As shown in FIG2 , the method includes step S101.

[0042] In S101, the first node sends HARQ-ACK feedback information to the second node; accordingly, the second node receives the HARQ-ACK feedback information sent by the first node; the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, and the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0043] Here, the first HARQ-ACK feedback information may also have other names, such as predicted HARQ-ACK feedback information.

[0044] In some embodiments, the physical shared channel includes a physical uplink shared channel (PUSCH) and a PDSCH.

[0045] In some embodiments, when the first HARQ-ACK feedback information is ACK, it indicates that the first physical shared channel will be correctly decoded or has been correctly decoded; when the first HARQ-ACK information is NACK, it indicates that the first physical shared channel will not be correctly decoded or has not been correctly decoded.

[0046] It can be understood that the first HARQ-ACK feedback information is the HARQ-ACK feedback information determined before the first physical shared channel is decoded, that is, the first HARQ-ACK feedback information is the predicted HARQ-ACK feedback information, so the first HARQ-ACK feedback information may not match the actual PDSCH decoding result. Since the corresponding HARQ-ACK feedback information can be obtained without decoding the first physical shared channel, it can be provided to the base station as early as possible. Compared with the relevant mechanism, the interval between the end position of the first physical shared channel and the starting position of the corresponding first HARQ-ACK feedback information can be reduced because no additional time is required to complete the decoding of the first physical shared channel. That is, the use of the first HARQ-ACK feedback information can achieve fast HARQ-ACK feedback.

[0047] In some embodiments, the first HARQ-ACK feedback information is determined based on at least one of the following parameters:

[0048] a first probability, where the first probability is a probability that the first physical shared channel is correctly decoded, determined based on a demodulation reference signal (DMRS) of the first physical shared channel;

[0049] a second probability, where the second probability is a probability that the first physical shared channel is erroneously decoded, determined based on a demodulation reference signal DMRS of the first physical shared channel;

[0050] a third probability, where the third probability is a probability that the first physical shared channel is correctly decoded, determined based on the DMRS of the physical control channel corresponding to the first physical shared channel;

[0051] a fourth probability, where the fourth probability is a probability that the first physical shared channel is erroneously decoded, determined based on the DMRS of the physical control channel corresponding to the first physical shared channel;

[0052] a first preset number of channel quality information before the first physical shared channel;

[0053] Modulation and coding scheme (MCS) information corresponding to the first physical shared channel;

[0054] a signaling indication of the second node;

[0055] channel quality information corresponding to the first physical shared channel;

[0056] MCS matching information corresponding to the first physical shared channel, where the MCS matching information refers to at least one of a probability of the first physical shared channel being correctly decoded or a probability of being incorrectly decoded based on the MCS information corresponding to the first physical shared channel;

[0057] decoding status of a second preset number of physical shared channels preceding the first physical shared channel;

[0058] decoding status of a physical shared channel within a first preset time period before the first physical shared channel; or

[0059] Channel quality information of the first physical shared channel within a second preset time period.

[0060] Here, the physical control channel includes PUCCH and PDCCH.

[0061] In some embodiments, the first preset number, the second preset number, the first preset duration or the second preset duration can be configured by the second node and sent to the first node through Radio Resource Control (RRC) signaling or DCI signaling; or can be configured autonomously by the first node.

[0062] In some embodiments, the MCS information corresponding to the first physical shared channel includes at least one of the following: modulation mode, code rate, spectrum efficiency or transport block size.

[0063] Here, the MCS information may also be an MCS index, based on which at least one of the following information for PDSCH may be obtained: modulation mode, code rate, spectrum efficiency, and size of a transport block corresponding to a physical shared channel.

[0064] In some embodiments, determining the first HARQ-ACK feedback information based on at least one of the probability of the first physical shared channel being correctly decoded or the probability of the first physical shared channel being erroneously decoded is specifically implemented as at least one of the following: determining the first HARQ-ACK feedback information based on comparing the probability of the first physical shared channel being correctly decoded with a first preset threshold, or comparing the probability of the first physical shared channel being erroneously decoded with a second preset threshold.

[0065] Here, at least one of the probability that the first physical shared channel is correctly decoded or the probability that the first physical shared channel is incorrectly decoded can be determined based on the demodulation reference signal DMRS of the first physical shared channel, or based on the DMRS of the physical control channel corresponding to the first physical shared channel.

[0066] In some embodiments, if the probability of the first physical shared channel being correctly decoded is greater than the first preset threshold, or the probability of the first physical shared channel being incorrectly decoded is less than at least one of the second preset thresholds, the first HARQ-ACK feedback information is determined to be ACK; if the probability of the first physical shared channel being correctly decoded is less than the first preset threshold, or the probability of the first physical shared channel being incorrectly decoded is greater than at least one of the second preset thresholds, the first HARQ-ACK feedback information is determined to be NACK.

[0067] In some embodiments, the first node determines at least one of the probabilities of the PDSCH being correctly decoded or incorrectly decoded based on the DMRS of the PDSCH, thereby obtaining predicted HARQ-ACK feedback information for the PDSCH. For example, by detecting the DMRS to obtain the channel quality, predicting at least one of the probabilities of the PDSCH being correctly decoded or incorrectly decoded, and then determining the predicted HARQ-ACK feedback information corresponding to the PDSCH; or, by detecting the DMRS to obtain a channel estimation result, predicting at least one of the probabilities of the PDSCH being correctly decoded or incorrectly decoded based on the channel estimation result, and then determining the predicted HARQ-ACK feedback information corresponding to the PDSCH.

[0068] In other embodiments, the first node determines at least one of the probabilities of the PDSCH being correctly decoded or the probabilities of being incorrectly decoded based on the DMRS corresponding to the PDCCH corresponding to the PDSCH, thereby obtaining predicted HARQ-ACK feedback information, including: for the PDSCH scheduled by the DCI in the PDCCH, when the first node is configured to provide predicted HARQ-ACK information, the first node determines at least one of the probabilities of the PDSCH being correctly decoded or the probabilities of being incorrectly decoded according to the DMRS in the PDCCH corresponding to the PDSCH, and then determines the predicted HARQ-ACK feedback information corresponding to the PDSCH; or, for a PDCCH, when the first node is configured to provide predicted HARQ-ACK information, the first node determines at least one of the probabilities of the PDSCH being correctly decoded or the probabilities of being incorrectly decoded according to the DMRS of the PDCCH, and then determines the predicted HARQ-ACK feedback information corresponding to the PDSCH.

[0069] In some further embodiments, for a first node configured to obtain the predicted HARQ-ACK feedback information corresponding to the PDSCH based on m (m is a positive integer) channel quality information reported before the PDSCH; the first node can determine at least one of the probabilities of the PDSCH being correctly decoded or incorrectly decoded (based on historical situations) based on the average of the m channel qualities continuously reported before receiving the PDSCH, combined with the MCS information (including at least one of the modulation mode or the code rate) scheduled for the PDSCH, thereby obtaining the predicted HARQ-ACK feedback information corresponding to the PDSCH.

[0070] In some embodiments, it can also be improved that the first node determines at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded based on one or more channel quality information related to the frequency domain resources (for example, the subband where the PDSCH is located) in which the PDSCH is scheduled among the m channel quality information reported before receiving the PDSCH, and then combines the MCS information (including at least one of the modulation mode or code rate) in which the PDSCH is scheduled to determine, and then determines the predicted HARQ-ACK feedback information corresponding to the PDSCH. For example, the bandwidth of a carrier is divided into 4 subbands in the frequency domain, and the first node measures the channel quality in each subband and reports it to the base station. If a PDSCH is scheduled in the second subband, the first node uses one or more channel quality information in the second subband reported before the PDSCH to determine at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded, thereby obtaining the predicted HARQ-ACK feedback information corresponding to the PDSCH.

[0071] In fact, using this method, the first node needs to first decode the PDCCH corresponding to the PDSCH, and then obtain the frequency domain resources where the PDSCH is located from the frequency domain resource allocation information in the PDCCH, and then combine one or more channel quality information related to the frequency domain resources reported by the first node to determine the predicted HARQ-ACK feedback information of the PDSCH. This method can also transmit the HARQ-ACK feedback information as early as possible relative to the HARQ-ACK feedback information transmission position in the related art.

[0072] In some further embodiments, based on the MCS information corresponding to the PDSCH (the MCS information includes at least one of: modulation mode, code rate or spectrum efficiency), the predicted HARQ-ACK feedback information of the PDSCH is determined, including: for the MCS information configured based on the PDSCH to obtain the predicted HARQ-ACK feedback information corresponding to the PDSCH, the first node can estimate at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded based on the historical PDSCH decoding results and the corresponding MCS information accumulated experience, combined with the MCS corresponding to the PDSCH, and finally obtain the predicted HARQ-ACK feedback information corresponding to the PDSCH.

[0073] It is understandable that this approach can be implemented based on an artificial intelligence (AI) model. For example, the AI ​​model is trained by using historical PDSCH decoding results and corresponding MCS information, so that the AI ​​model can accurately predict the HARQ-ACK feedback information based on the MCS of the PDSCH.

[0074] In some embodiments, the first HARQ-ACK feedback information is determined based on output information of an artificial intelligence (AI) model, where the output information of the AI ​​model includes at least one of the following:

[0075] HARQ-ACK feedback information corresponding to the first physical shared channel predicted by the AI ​​model;

[0076] The probability of the first physical shared channel being correctly decoded, as predicted by the AI ​​model;

[0077] The probability of the first physical shared channel being erroneously decoded, as predicted by the AI ​​model; or

[0078] Channel quality information corresponding to the first physical shared channel predicted by the AI ​​model.

[0079] In some embodiments, the AI ​​model is trained based on sample information and sample labels of at least one sample.

[0080] Here, the sample information is the relevant information of a physical shared channel within a historical time period, and the relevant information of the physical shared channel includes at least one of the following: the fourth preset number of channel quality information before the physical shared channel, the channel quality information within the third preset time length before the physical shared channel, the decoding result of the physical shared channel within the fourth preset time length before the physical shared channel, the MCS information corresponding to the physical shared channel, and the channel quality information corresponding to the physical shared channel; the sample label is the decoding result of the physical shared channel.

[0081] In some embodiments, the channel quality information corresponding to the physical shared channel is determined based on at least one of the following:

[0082] Channel quality information measured by DMRS of the physical shared channel;

[0083] the fifth predetermined number of channel quality information before the physical shared channel; or

[0084] Channel quality information measured by the DMRS of the physical control channel corresponding to the physical shared channel.

[0085] In some embodiments, the sample information further includes at least one of the following:

[0086] MCS conformity information corresponding to the physical shared channel sent by the second node, where the MCS conformity information refers to at least one of a probability of the physical shared channel being correctly decoded or a probability of being incorrectly decoded based on the MCS information corresponding to the physical shared channel; or

[0087] The channel quality information corresponding to the physical shared channel sent by the second node is determined based on MCS information corresponding to the physical shared channel.

[0088] In some embodiments, the MCS information corresponding to the physical shared channel includes at least one of the following: modulation mode, code rate, spectrum efficiency or transport block size.

[0089] In some embodiments, the second node can send the MCS matching information corresponding to the physical shared channel to the first node at the same time when scheduling a PDSCH, and the AI ​​model can also be trained based on the MCS matching information, so that when the MCS matching information corresponding to the physical shared channel is input into the AI ​​model, the predicted HARQ-ACK feedback information corresponding to the physical shared channel can be output.

[0090] The second node may also send channel quality information to the first node at the same time when scheduling a PDSCH. The channel quality information is associated with the PDSCH. That is, from the second node side, the second node determines the MCS information corresponding to the PDSCH based on the channel quality information. From the second node side, it is believed that the channel quality information matches the PDSCH, and the first node should be able to correctly decode the PDSCH. In this way, the AI ​​model can also be trained based on the channel quality information and output predicted HARQ-ACK feedback information. When the channel quality information of the physical shared channel is input to the AI ​​model, the predicted HARQ-ACK feedback information corresponding to the physical shared channel can be output.

[0091] In some embodiments, during the training process, the AI ​​model can input sample information (sample information is relevant information of a physical shared channel in a historical time period) into the AI ​​model one by one, and output the predicted HARQ-ACK feedback information of the PDSCH. Then, the loss value can be determined based on the actual HARQ-ACK feedback information of the PDSCH corresponding to the output predicted HARQ-ACK feedback information of the PDSCH. The loss value can be used to characterize the difference between the predicted HARQ-ACK feedback information of the PDSCH output and the actual HARQ-ACK feedback information of the corresponding PDSCH. The larger the loss value, the greater the difference. Afterwards, the loss value can be used to update the parameters of the initial AI model. Thus, each time a sample information is input, the parameters of the AI ​​model can be updated based on the actual HARQ-ACK feedback information corresponding to the sample information.

[0092] In some embodiments, HARQ-ACK information is transmitted for the PDSCH based on the AI ​​model, or at least one of the probability of correct decoding or the probability of incorrect decoding output by the AI ​​model for the PDSCH is used to obtain predicted HARQ-ACK information. For all of the above correct decoding probabilities or incorrect decoding probabilities, a decision can be made based on a predetermined threshold to obtain HARQ-ACK information.

[0093] In some embodiments, the predicted HARQ-ACK feedback information is determined using the output information of the AI ​​model based on the following method:

[0094] The AI ​​model is trained based on the PDSCH decoding results in the historical time period and the corresponding channel quality information measured by the DMRS of the PDSCH. When using the AI ​​model, the input of the AI ​​model is the channel quality information measured by the DMRS of the PDSCH, and the output is at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded, or the (predicted) HARQ-ACK feedback information of the PDSCH.

[0095] The AI ​​model is trained based on the PDSCH decoding results in the historical time period and the channel quality information measured by the DMRS of the PDCCH corresponding to the PDSCH. When using the AI ​​model, the input of the AI ​​model is the channel quality information measured by the DMRS of the PDCCH corresponding to the PDSCH, and the output is at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded, or the (predicted) HARQ-ACK feedback information of the PDSCH.

[0096] The AI ​​model is trained based on the PDSCH decoding results within the historical time period and the corresponding fourth preset number of channel quality information before the PDSCH or the channel quality information within the third preset time length before the PDSCH. When using the AI ​​model, the input of the AI ​​model is the fourth preset number of channel quality information before the PDSCH or the channel quality information within the third preset time length (or window length) before the PDSCH, and the output is at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded, or the (predicted) HARQ-ACK feedback information of the PDSCH.

[0097] The AI ​​model is trained based on the PDSCH decoding results within the historical time period and the corresponding PDSCHs decoding results within the fourth preset time length (or window length) before the PDSCH. When using the AI ​​model, the input of the AI ​​model is the PDSCHs decoding result within the fourth preset time length (or window length) before the PDSCH, and the output is at least one of the probability of the PDSCH being correctly decoded or the probability of being incorrectly decoded, or the (predicted) HARQ-ACK feedback information of the PDSCH.

[0098] In some embodiments, the HARQ-ACK feedback information further includes second HARQ-ACK feedback information corresponding to the second physical shared channel, where the second HARQ-ACK feedback information is HARQ-ACK feedback information determined after decoding the second physical shared channel.

[0099] Here, the second HARQ-ACK feedback information may also have other names, such as actual HARQ-ACK feedback information, which is not limited in this disclosure.

[0100] In some embodiments, when the second HARQ-ACK feedback information is ACK, it indicates that the second physical shared channel will be correctly decoded or has been correctly decoded; when the second HARQ-ACK information is NACK, it indicates that the second physical shared channel will not be correctly decoded or has not been correctly decoded.

[0101] In some embodiments, the form of the HARQ-ACK feedback information includes at least one of the following: a HARQ-ACK codebook mechanism, a HARQ-ACK bundling mechanism, a NACK only feedback mechanism, or a disabled HARQ-ACK mechanism.

[0102] In some embodiments, the first node sends a HARQ-ACK codebook to the second node, where the HARQ-ACK codebook includes HARQ-ACK feedback information, and each bit in the HARQ-ACK codebook corresponds to one of the following:

[0103] at least one first HARQ-ACK feedback information; or

[0104] At least one second HARQ-ACK feedback information.

[0105] In some embodiments, the first bit in the bits of the HARQ-ACK codebook is located before the second bit, the first bit is a bit corresponding to at least one first HARQ-ACK feedback information, and the second bit is a bit corresponding to at least one second HARQ-ACK feedback information.

[0106] For example, the HARQ-ACK feedback information included in a HARQ-ACK codebook is only the first HARQ-ACK feedback information determined based on the DMRS of each PDSCH in multiple PDSCHs. Here, a HARQ-ACK codebook cannot include both the first HARQ-ACK feedback information and the second HARQ-ACK feedback information.

[0107] Alternatively, the HARQ-ACK feedback information contained in a HARQ-ACK codebook is allowed to include first HARQ-ACK feedback information and second HARQ-ACK feedback information. For example, the first HARQ-ACK feedback information is concatenated in the order of PDSCH, and the second HARQ-ACK feedback information is concatenated in the order of the corresponding PDSCH. The concatenated first HARQ-ACK feedback information is placed before (or after) the concatenated second HARQ-ACK feedback information to obtain a HARQ-ACK codebook. The PUCCH resources used by the HARQ-ACK codebook are from the PUCCH resources configured for the second HARQ-ACK feedback information.

[0108] The transmission of the first HARQ-ACK feedback information can be based on the HARQ-ACK codebook mechanism and the HARQ-ACK bundling mechanism. For example, the above mechanism requires that: if a HARQ-ACK codebook contains one or more first HARQ-ACK feedback information and one or more second HARQ-ACK feedback information at the same time, then the first HARQ-ACK feedback information can be bundled with each other, the second HARQ-ACK feedback information can be bundled with each other, but the first HARQ-ACK feedback information and the second HARQ-ACK feedback information cannot be bundled with each other. Or, for example, the above mechanism requires that: if a HARQ-ACK codebook contains one or more first HARQ-ACK feedback information and one or more second HARQ-ACK feedback information at the same time, different types of HARQ-ACK feedback information can be bundled with each other.

[0109] In some embodiments, the start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the end symbol of the DMRS of the first physical shared channel, and the start symbol is separated from the end symbol of the DMRS of the first physical shared channel by at least a third preset number of symbols; or,

[0110] The start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel, and the start symbol is separated from the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel by at least a sixth preset number of symbols; or,

[0111] The start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel follows the end symbol of the physical control channel corresponding to the first physical shared channel, and the start symbol and the end symbol of the first physical control channel are separated by at least a seventh preset number of symbols.

[0112] In some embodiments, the interval duration between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the DMRS of the first physical shared channel is determined based on a third preset number.

[0113] Alternatively, the interval duration between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel is determined based on a sixth preset number.

[0114] Alternatively, the interval duration between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the physical control channel corresponding to the first physical shared channel is determined based on a seventh preset number.

[0115] In some embodiments, the third predetermined number is determined based on at least one of the following:

[0116] a subcarrier spacing of the first physical shared channel;

[0117] The subcarrier spacing of the physical control channel corresponding to the first physical shared channel; or

[0118] The subcarrier spacing of the physical control channel occupied by the first HARQ-ACK feedback information corresponding to the first physical shared channel.

[0119] In some embodiments, the third preset number, the sixth preset number, and the seventh preset number are predetermined in the standard, or configured by the first node and reported to the second node.

[0120] In some embodiments, the earliest starting position of the first HARQ-ACK feedback information corresponding to a PDSCH is defined as: after the end symbol of the DMRS of the PDSCH and at least T symbols after the end symbol of the DMRS of the first physical shared channel. T is predetermined in the standard. Alternatively, T is reported to the base station by the UE. The value of T is related to the subcarrier spacing of the PDSCH, the subcarrier spacing of the PDCCH that schedules the PDSCH, and the subcarrier spacing of the PUCCH where the HARQ-ACK is located.

[0121] In addition, in the related art, for a PDSCH, the actual HARQ-ACK feedback information of the PDSCH is provided at the earliest N1 symbols after the last symbol of the PDSCH, which is converted into time and expressed as: the actual HARQ-ACK feedback information of the PDSCH is provided at the earliest T after the last symbol of the PDSCH. proc,1 duration, In some cases, T proc,1Will be fine-tuned by the following formula d 1,1 Or d2. Similar principle, for the above predicted HARQ-ACK information, the new T proc,1 Determined based on T, for example, using T to replace N1 or (N1+d 1,1 ), and the other parameters remain unchanged. Generally, especially for PDSCH scheduled in the pre-DMRS mode, since the DMRS is located before the PDSCH, the new T is determined based on the third preset number of symbols after the DMRS symbol of the PDSCH, relative to the earliest starting position of the HARQ-ACK feedback information in the related art. proc,1 It can provide the earliest starting position of HARQ-ACK feedback information earlier, thereby reducing the delay of HARQ-ACK information.

[0122] In some embodiments, the first node sending HARQ-ACK feedback information to the second node includes:

[0123] When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are different, the first node sends the first HARQ-ACK feedback information to the second node and then sends the second HARQ-ACK feedback information;

[0124] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are the same, after the first node sends the first HARQ-ACK feedback information to the second node, it does not send the second HARQ-ACK feedback information;

[0125] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is NACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is ACK, the first node does not send the second HARQ-ACK feedback information after sending the first HARQ-ACK feedback information to the second node;

[0126] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is ACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is NACK, the first node sends the first HARQ-ACK feedback information to the second node and then sends the second HARQ-ACK feedback information.

[0127] It's understandable that because the first HARQ-ACK feedback information is estimated, its purpose is to reduce feedback latency, at the expense of possible transmission errors. Therefore, when the first HARQ-ACK feedback information differs from the second HARQ-ACK feedback information, it's necessary to promptly resend the second HARQ-ACK feedback information on the same physical shared channel to eliminate the aforementioned negative impact. Of course, the probability of this negative impact occurring is relatively small, as the estimated success rate of the first HARQ-ACK feedback information is only used if it meets a certain threshold.

[0128] Considering that the probability of the first HARQ-ACK feedback information and the second HARQ-ACK feedback information being different is low, the following optimization scheme may be further considered:

[0129] If the first HARQ-ACK feedback information and the second HARQ-ACK feedback information corresponding to the same physical shared channel are the same, the first node will no longer send the second HARQ-ACK feedback information corresponding to the physical shared channel after sending the first HARQ-ACK feedback information to the second node; otherwise, the first HARQ-ACK feedback information will be sent before the second HARQ-ACK feedback information. In this way, the first node's transmission can be reduced and the above-mentioned negative impact can be eliminated. Because after the second node receives the first HARQ-ACK feedback information of a physical shared channel, if it does not receive the second HARQ-ACK feedback information of the physical shared channel, the base station considers the first HARQ-ACK information to be valid, which is equivalent to the result after actually decoding the physical shared channel.

[0130] Let’s continue to consider the following example:

[0131] If the first HARQ-ACK feedback information corresponding to the same physical shared channel is NACK information, and the corresponding second HARQ-ACK feedback information is ACK, the first node will no longer send the second HARQ-ACK feedback information after sending the first HARQ-ACK feedback information to the second node.

[0132] In this case, although the physical shared channel may be retransmitted, the first node has already obtained the physical shared channel, so this processing method will not affect the first node's acquisition of the correct physical shared channel.

[0133] If the first HARQ-ACK feedback information corresponding to the same physical shared channel is ACK information, and the corresponding second HARQ-ACK feedback information is NACK, the first node sends the first HARQ-ACK feedback information to the second node, and then sends the second HARQ-ACK feedback information. In this case, the first node does not obtain the correct physical shared channel, so it needs to send the second HARQ-ACK feedback information again in a timely manner.

[0134] It is understood that this mechanism can provide HARQ-ACK information with less delay and reduce the number of HARQ-ACK PUCCH transmissions without causing additional unacceptable errors. For example, if only predicted HARQ-ACK information is performed and the predicted HARQ-ACK information is erroneous, it will cause unacceptable errors.

[0135] In some embodiments, after the first node sends HARQ-ACK feedback information corresponding to the physical shared channel to the second node, it also includes: the first node sends first indication information to the second node, and the first indication information is used to indicate whether the first HARQ-ACK feedback information corresponding to the physical shared channel is correct.

[0136] It can be understood that after the first node sends the first HARQ-ACK feedback information corresponding to the physical shared channel to the second node, it sends the first indication information, and the first indication information is used to indicate whether the first HARQ-ACK feedback information corresponding to the physical shared channel is correct. That is, the first indication information is used to indicate whether the first HARQ-ACK feedback information corresponding to the physical shared channel and the corresponding second HARQ-ACK feedback information are the same, or the first indication information is used to indicate whether the first HARQ-ACK feedback information is correct, that is, the first HARQ-ACK feedback information is correct if it is the same as the second HARQ-ACK feedback information, otherwise it is incorrect.

[0137] The above embodiment is further optimized as follows:

[0138] If the results of the first HARQ-ACK feedback information and the corresponding second HARQ-ACK feedback information corresponding to the physical shared channel are the same, the first indication information is not sent after the first node sends the first HARQ-ACK feedback information to the second node; or the first indication information is sent after the first node sends the first HARQ-ACK feedback information to the second node. In this case, the first indication information is used to indicate that the first HARQ-ACK feedback information corresponding to the physical shared channel is correct.

[0139] If the first HARQ-ACK feedback information corresponding to the physical shared channel is NACK, and the corresponding second HARQ-ACK feedback information is ACK, the first indication information is no longer sent. In this case, the first node has correctly received the physical shared channel, even though the first HARQ-ACK feedback information sent by the first node is NACK. Therefore, the first indication information can be no longer sent. Although this will cause the base station to retransmit the physical shared channel, it will not affect the timeliness of the physical shared channel, but will only consume additional resources related to retransmitting the physical shared channel.

[0140] If the first HARQ-ACK feedback information corresponding to the physical shared channel is ACK, and the corresponding second HARQ-ACK feedback information is NACK, the first indication information is sent after the first node sends the first HARQ-ACK feedback information to the second node. In this case, the first indication information is used to indicate that the first HARQ-ACK feedback information corresponding to the physical shared channel is incorrect.

[0141] In some embodiments, the first indication information is sent via an independent PUCCH resource, and the first indication information is represented in a sequence-based manner.

[0142] In some embodiments, the first node receives second indication information sent by the second node, where the second indication information is used to indicate at least one of the following:

[0143] Sending first HARQ-ACK feedback information;

[0144] Sending second HARQ-ACK feedback information;

[0145] Parameters used to determine the first HARQ-ACK feedback information; or

[0146] Output information of the AI ​​model.

[0147] Here, the second indication information may be RRC signaling or DCI signaling.

[0148] In some embodiments, the second node indicates, through RRC signaling or DCI signaling, the mechanism by which the first node sends the HARQ-ACK feedback information corresponding to the PDSCH. For example, the first node sends the first HARQ-ACK feedback information corresponding to the PDSCH to the second node, or the first node sends the second HARQ-ACK feedback information corresponding to the PDSCH. If the first node is instructed to send the first HARQ-ACK feedback information corresponding to the PDSCH, and there are multiple ways to determine the first HARQ-ACK feedback information, it is further indicated which way to use to determine the first HARQ-ACK feedback information.

[0149] Based on this, HARQ-ACK feedback information is sent to the second node via the first node. The HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel. Here, the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel. Since the corresponding HARQ-ACK feedback information can be obtained without decoding the first physical shared channel, and the HARQ-ACK feedback information is provided to the second node, the HARQ-ACK information feedback time is shortened and the efficiency of HARQ-ACK feedback is improved.

[0150] The above mainly introduces the scheme of the embodiment of the present disclosure from the perspective of method. A data transmission device is also shown below for executing the data transmission method in any of the above embodiments and possible implementation methods thereof. It can be understood that the data transmission device includes at least one of the hardware structures or software modules corresponding to the execution of each function for the data transmission method; those skilled in the art should easily realize that, in combination with the algorithm steps of each embodiment described in the embodiment of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the embodiment. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0151] The embodiment of the present disclosure can divide the data transmission device into functional modules according to the above-mentioned method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above-mentioned integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiment of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0152] FIG3 is a block diagram of a data transmission device according to some embodiments of the present disclosure. The data transmission device 30 includes: a communication module 31 and a model training module 32.

[0153] The communication module 31 is used to send HARQ-ACK feedback information, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to the first physical shared channel, and the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding the first physical shared channel.

[0154] In some embodiments, the HARQ-ACK feedback information further includes second HARQ-ACK feedback information corresponding to the second physical shared channel, where the second HARQ-ACK feedback information is HARQ-ACK feedback information determined after decoding the second physical shared channel.

[0155] In some embodiments, the first HARQ-ACK feedback information is determined based on at least one of the following parameters:

[0156] A first probability, where the first probability is a probability that the first physical shared channel is correctly decoded, determined based on a demodulation reference signal DMRS of the first physical shared channel;

[0157] a second probability, where the second probability is a probability that the first physical shared channel is erroneously decoded, determined based on a demodulation reference signal DMRS of the first physical shared channel;

[0158] a third probability, where the third probability is a probability that the first physical shared channel is correctly decoded, determined based on the DMRS of the physical control channel corresponding to the first physical shared channel;

[0159] a fourth probability, where the fourth probability is a probability that the first physical shared channel is erroneously decoded, determined based on the DMRS of the physical control channel corresponding to the first physical shared channel;

[0160] a first preset number of channel quality information before the first physical shared channel;

[0161] Modulation and coding scheme MCS information corresponding to the first physical shared channel;

[0162] a signaling indication of the second node;

[0163] channel quality information corresponding to the first physical shared channel;

[0164] MCS matching information corresponding to the first physical shared channel, where the MCS matching information refers to at least one of a probability of the physical shared channel being correctly decoded or a probability of being incorrectly decoded based on the MCS information corresponding to the first physical shared channel;

[0165] decoding status of a second preset number of physical shared channels preceding the first physical shared channel;

[0166] decoding status of a physical shared channel within a first preset time period before the first physical shared channel; or

[0167] Channel quality information of the first physical shared channel within a second preset time period.

[0168] In some embodiments, the first HARQ-ACK feedback information is determined based on output information of an artificial intelligence (AI) model, where the output information of the AI ​​model includes at least one of the following:

[0169] HARQ-ACK feedback information corresponding to the first physical shared channel predicted by the AI ​​model;

[0170] The probability of the first physical shared channel being correctly decoded, as predicted by the AI ​​model;

[0171] The probability of the first physical shared channel being erroneously decoded, as predicted by the AI ​​model; or

[0172] Channel quality information corresponding to the first physical shared channel predicted by the AI ​​model.

[0173] In some embodiments, the communication module 31 is configured to send a HARQ-ACK codebook, where the HARQ-ACK codebook includes HARQ-ACK feedback information, and each bit in the HARQ-ACK codebook corresponds to one of the following:

[0174] at least one first HARQ-ACK feedback information; or

[0175] At least one second HARQ-ACK feedback information.

[0176] In some embodiments, the first bit in the bits of the HARQ-ACK codebook is located before the second bit, the first bit is a bit corresponding to at least one first HARQ-ACK feedback information, and the second bit is a bit corresponding to at least one second HARQ-ACK feedback information.

[0177] In some embodiments, the start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the end symbol of the DMRS of the first physical shared channel, and the start symbol is separated from the end symbol of the DMRS of the first physical shared channel by at least a third preset number of symbols; or,

[0178] The start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel, and the start symbol is separated from the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel by at least a sixth preset number of symbols; or,

[0179] The start symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel follows the end symbol of the physical control channel corresponding to the first physical shared channel, and the start symbol and the end symbol of the first physical control channel are separated by at least a seventh preset number of symbols.

[0180] In some embodiments, the interval duration between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the DMRS of the first physical shared channel is determined based on a third preset number; or,

[0181] The duration of the interval between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the DMRS of the physical control channel corresponding to the first physical shared channel is determined based on a sixth preset number; or,

[0182] The duration of the interval between the position of the start symbol corresponding to the first HARQ-ACK feedback information corresponding to the first physical shared channel and the end symbol of the physical control channel corresponding to the first physical shared channel is determined based on the seventh preset number.

[0183] In some embodiments, the third predetermined number is determined based on at least one of the following:

[0184] a subcarrier spacing of the first physical shared channel;

[0185] The subcarrier spacing of the physical control channel corresponding to the first physical shared channel; or

[0186] The subcarrier spacing of the physical control channel occupied by the first HARQ-ACK feedback information corresponding to the first physical shared channel.

[0187] In some embodiments, the communication module 31 is configured to, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are different, send the first HARQ-ACK feedback information and then send the second HARQ-ACK feedback information;

[0188] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are the same, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not sent;

[0189] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is NACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is ACK, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not sent;

[0190] Alternatively, when the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is ACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is NACK, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is sent.

[0191] In some embodiments, the communication module 31 is configured to send first indication information, where the first indication information is used to indicate whether first HARQ-ACK feedback information corresponding to the first physical shared channel is correct.

[0192] In some embodiments, the communication module 31 is configured to receive second indication information, where the second indication information is configured to indicate at least one of the following:

[0193] Sending first HARQ-ACK feedback information;

[0194] Sending second HARQ-ACK feedback information;

[0195] Parameters used to determine the first HARQ-ACK feedback information; or

[0196] Output information of the AI ​​model.

[0197] In some embodiments, a model training module 32 is configured to train an AI model based on sample information and sample labels of at least one sample;

[0198] Here, the sample information is the relevant information of a physical shared channel within a historical time period, and the relevant information of the physical shared channel includes at least one of the following: the fourth preset number of channel quality information before the physical shared channel, the channel quality information within the third preset time length before the physical shared channel, the decoding result of the physical shared channel within the fourth preset time length before the physical shared channel, the MCS information corresponding to the physical shared channel, and the channel quality information corresponding to the physical shared channel; the sample label is the decoding result of the physical shared channel.

[0199] In some embodiments, the channel quality information corresponding to the physical shared channel is determined based on at least one of the following:

[0200] Channel quality information measured by DMRS of the physical shared channel;

[0201] the fifth predetermined number of channel quality information before the physical shared channel; or

[0202] Channel quality information measured by the DMRS of the physical control channel corresponding to the physical shared channel.

[0203] In some embodiments, the sample information further includes at least one of the following:

[0204] MCS matching information corresponding to the physical shared channel sent by the second node; or

[0205] The channel quality information corresponding to the physical shared channel sent by the second node is determined based on MCS information corresponding to the physical shared channel.

[0206] In some embodiments, the communication module 31 is used for MCS information corresponding to the physical shared channel, which includes at least one of the following: modulation mode, code rate, spectrum efficiency, or transport block size.

[0207] FIG4 is a block diagram of another data transmission device according to some embodiments of the present disclosure. The data transmission device 40 includes: a communication module 41 and a model training module 42.

[0208] The communication module 41 is configured to receive hybrid automatic repeat request HARQ-ACK feedback information corresponding to a physical shared channel, where the HARQ-ACK feedback information includes at least first HARQ-ACK feedback information corresponding to a first physical shared channel, where the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding of the first physical shared channel.

[0209] In some embodiments, the HARQ-ACK feedback information further includes second HARQ-ACK feedback information corresponding to the second physical shared channel, where the second HARQ-ACK feedback information is HARQ-ACK feedback information determined after decoding the second physical shared channel.

[0210] In some embodiments, the communication module 41 is configured to receive a HARQ-ACK codebook, where the HARQ-ACK codebook includes multiple bits, each of which corresponds to one of the following:

[0211] at least one first HARQ-ACK feedback information; or

[0212] At least one second HARQ-ACK feedback information.

[0213] In some embodiments, the communication module 41 is configured to, when the first physical shared channel and the second physical shared channel are the same physical shared channel and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are different, receive the first HARQ-ACK feedback information and then receive the second HARQ-ACK feedback information; or

[0214] When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel and the second HARQ-ACK feedback information corresponding to the physical shared channel are the same, after receiving the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not received; or

[0215] When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is NACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is ACK, after receiving the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not received; or

[0216] When the first physical shared channel and the second physical shared channel are the same physical shared channel, the first HARQ-ACK feedback information corresponding to the physical shared channel is ACK information, and the second HARQ-ACK feedback information corresponding to the physical shared channel is NACK, after receiving the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is received.

[0217] In some embodiments, the communication module 41 is configured to receive first indication information, where the first indication information is used to indicate whether first HARQ-ACK feedback information corresponding to the first physical shared channel is correct.

[0218] In some embodiments, the communication module 41 is configured to send second indication information, where the second indication information is configured to indicate at least one of the following:

[0219] Sending first HARQ-ACK feedback information;

[0220] Sending second HARQ-ACK feedback information;

[0221] Parameters used to determine the first HARQ-ACK feedback information; or

[0222] Output information of the AI ​​model.

[0223] In some embodiments, the model training module 42 is configured to train an AI model based on sample information and sample labels of at least one sample;

[0224] Here, the sample information is the relevant information of a physical shared channel within a historical time period, and the relevant information of the physical shared channel includes at least one of the following: the fourth preset number of channel quality information before the physical shared channel, the channel quality information within the third preset time length before the physical shared channel, the decoding result of the physical shared channel within the fourth preset time length before the physical shared channel, the MCS information corresponding to the physical shared channel, and the channel quality information corresponding to the physical shared channel; the sample label is the decoding result of the physical shared channel.

[0225] In some embodiments, the channel quality information corresponding to the physical shared channel is determined based on at least one of the following:

[0226] Channel quality information measured by DMRS of the physical shared channel;

[0227] the fifth predetermined number of channel quality information before the physical shared channel; or

[0228] Channel quality information measured by the DMRS of the physical control channel corresponding to the physical shared channel.

[0229] In some embodiments, the MCS information corresponding to the first physical shared channel includes at least one of the following: modulation mode, code rate, and spectrum efficiency.

[0230] Here, the related contents such as the determination method of the first HARQ-ACK feedback information, the HARQ-ACK codebook and sample information can be referred to the description of the above embodiment and will not be repeated here.

[0231] In the case of implementing the functions of the above-mentioned integrated modules in hardware, the embodiments of the present disclosure also provide a possible structure of a communication device for executing the data transmission method provided in the embodiments of the present disclosure. As shown in Figure 5, the communication device 500 includes: a communication interface 503, a processor 502, and a bus 504. In some embodiments, the communication device may also include a memory 501.

[0232] The processor 502 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor (DSP) and a microprocessor, and the like.

[0233] The communication interface 503 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0234] The memory 501 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0235] In some embodiments, the memory 501 may exist independently of the processor 502 and may be connected to the processor 502 via a bus 504 for storing instructions or program codes. When the processor 502 calls and executes the instructions or program codes stored in the memory 501, the data transmission method provided in the embodiments of the present disclosure can be implemented.

[0236] In other embodiments, the memory 501 may also be integrated with the processor 502 .

[0237] Bus 504 can be an Extended Industry Standard Architecture (EISA) bus, etc. Bus 504 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, FIG5 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0238] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the data transmission method described in any of the above embodiments.

[0239] In some embodiments, the computer may be the aforementioned data transmission device, and the present disclosure does not limit the exemplary form of the computer.

[0240] In some embodiments, the computer-readable storage medium may include, but is not limited to, magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent at least one of one or more devices or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, at least one of a wireless channel and various other media capable of storing, containing, and / or carrying instructions or data.

[0241] An embodiment of the present disclosure provides a computer program product comprising instructions. When the computer program product is run on a computer, the computer is enabled to execute the data transmission method described in any one of the above embodiments.

[0242] The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A data transmission method, applied to a first node, the method comprising: Sending HARQ-ACK feedback information, where the HARQ-ACK feedback information at least includes first HARQ-ACK feedback information corresponding to a first physical shared channel, and the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding of the first physical shared channel.

2. The method according to claim 1, wherein The HARQ-ACK feedback information further includes second HARQ-ACK feedback information corresponding to a second physical shared channel, and the second HARQ-ACK feedback information is HARQ-ACK feedback information determined after decoding of the second physical shared channel.

3. The method according to claim 1, wherein The first HARQ-ACK feedback information is determined based on at least one of the following parameters: A first probability, where the first probability is the probability that the first physical shared channel is correctly decoded based on the demodulation reference signal DMRS of the first physical shared channel; A second probability, where the second probability is the probability that the first physical shared channel is incorrectly decoded based on the demodulation reference signal DMRS of the first physical shared channel; A third probability, where the third probability is the probability that the first physical shared channel is correctly decoded based on the DMRS of the physical control channel corresponding to the first physical shared channel; A fourth probability, where the fourth probability is the probability that the first physical shared channel is incorrectly decoded based on the DMRS of the physical control channel corresponding to the first physical shared channel; Channel quality information of a first preset number of channels before the first physical shared channel; Modulation and coding scheme MCS information corresponding to the first physical shared channel; Signaling indication of a second node; Channel quality information corresponding to the first physical shared channel; MCS matching degree information corresponding to the first physical shared channel, where the MCS matching degree information refers to at least one of the probability that the first physical shared channel is correctly decoded or the probability that the first physical shared channel is incorrectly decoded based on the MCS information corresponding to the first physical shared channel; Decoding conditions of a second preset number of physical shared channels before the first physical shared channel; Decoding conditions of physical shared channels within a first preset time period before the first physical shared channel; or Channel quality information within a second preset time period before the first physical shared channel.

4. The method according to claim 1, wherein The first HARQ-ACK feedback information is determined based on output information of an artificial intelligence AI model, and the output information of the AI model includes at least one of the following: The HARQ-ACK feedback information corresponding to the first physical shared channel predicted by the AI model; The probability that the first physical shared channel is correctly decoded predicted by the AI model; The probability that the first physical shared channel is incorrectly decoded predicted by the AI model; or The channel quality information corresponding to the first physical shared channel predicted by the AI model.

5. The method according to claim 1, wherein The sending of the HARQ-ACK feedback information includes: Transmit a HARQ-ACK codebook, where the HARQ-ACK codebook contains the HARQ-ACK feedback information, and each bit in the bits of the HARQ-ACK codebook corresponds to one of the following: At least one first HARQ-ACK feedback information; or At least one second HARQ-ACK feedback information.

6. The method according to claim 5, wherein Among the bits of the HARQ-ACK codebook, the first bit is before the second bit, the first bit is the bit corresponding to the at least one first HARQ-ACK feedback information, and the second bit is the bit corresponding to the at least one second HARQ-ACK feedback information.

7. The method according to claim 1, wherein The starting symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the ending symbol of the DMRS of the first physical shared channel, and is separated from the ending symbol of the DMRS of the first physical shared channel by at least a third preset number of symbols; or, The starting symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the ending symbol of the DMRS of the physical control channel corresponding to the first physical shared channel, and is separated from the ending symbol of the DMRS of the physical control channel corresponding to the first physical shared channel by at least a sixth preset number of symbols; or, The starting symbol of the first HARQ-ACK feedback information corresponding to the first physical shared channel is after the ending symbol of the physical control channel corresponding to the first physical shared channel, and is separated from the ending symbol of the physical control channel corresponding to the first physical shared channel by at least a seventh preset number of symbols.

8. The method according to claim 7, wherein, The interval duration between the position of the starting symbol corresponding to the first HARQ-ACK feedback information of the first physical shared channel and the ending symbol of the DMRS of the first physical shared channel is determined based on the third preset number; or, The interval duration between the position of the starting symbol corresponding to the first HARQ-ACK feedback information of the first physical shared channel and the ending symbol of the DMRS of the physical control channel corresponding to the first physical shared channel is determined based on the sixth preset number; or, The interval duration between the position of the starting symbol corresponding to the first HARQ-ACK feedback information of the first physical shared channel and the ending symbol of the physical control channel corresponding to the first physical shared channel is determined based on the seventh preset number.

9. The method according to claim 7 or 8, wherein The third preset number is determined based on at least one of the following: The subcarrier spacing of the first physical shared channel; The subcarrier spacing of the physical control channel corresponding to the first physical shared channel; or The subcarrier spacing of the physical control channel occupied by the first HARQ-ACK feedback information corresponding to the first physical shared channel.

10. The method according to claim 2, wherein, The transmitting of the HARQ-ACK feedback information includes: When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is different from the second HARQ-ACK feedback information corresponding to the physical shared channel, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is sent; or, When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is the same as the second HARQ-ACK feedback information corresponding to the physical shared channel, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not sent; or, When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is a NACK message, and the second HARQ-ACK feedback information corresponding to the physical shared channel is an ACK, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is not sent; or, When the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is an ACK message, and the second HARQ-ACK feedback information corresponding to the physical shared channel is a NACK, after sending the first HARQ-ACK feedback information, the second HARQ-ACK feedback information is sent.

11. The method according to claim 1, wherein After sending the HARQ-ACK feedback information, it further includes: Sending first indication information, where the first indication information is used to indicate whether the first HARQ-ACK feedback information corresponding to the first physical shared channel is correct.

12. The method according to claim 2, wherein, The method further includes: Receiving second indication information, where the second indication information is used to indicate at least one of the following: Sending the first HARQ-ACK feedback information; Sending the second HARQ-ACK feedback information; Parameters for determining the first HARQ-ACK feedback information; or Output information of the AI model.

13. The method according to claim 4, wherein The method further includes: Training the AI model based on sample information and sample labels of at least one sample; Wherein, the sample information is related information of a physical shared channel within a historical time period, and the related information of the physical shared channel includes at least one of the following: the channel quality information of the fourth preset number of channels before the physical shared channel, the channel quality information within the third preset duration before the physical shared channel, the decoding result of the physical shared channel within the fourth preset duration before the physical shared channel, the MCS information corresponding to the physical shared channel, and the channel quality information corresponding to the physical shared channel; the sample label is the decoding result of the physical shared channel.

14. The method according to claim 3 or 13, wherein The channel quality information corresponding to the physical shared channel is determined based on at least one of the following: Channel quality information of DMRS measurement of the physical shared channel; Channel quality information of the fifth preset number of channels before the physical shared channel; or Channel quality information of DMRS measurement of the physical control channel corresponding to the physical shared channel.

15. The method according to claim 13, wherein The sample information further includes at least one of the following: MCS matching degree information corresponding to the physical shared channel sent by the second node; or Channel quality information corresponding to the physical shared channel sent by the second node, where the channel quality information corresponding to the physical shared channel is determined based on the MCS information corresponding to the physical shared channel.

16. The method according to claim 3, wherein, The MCS information corresponding to the physical shared channel includes at least one of the following: modulation mode, code rate, spectral efficiency, or transport block size.

17. A data transmission method applied to a second node, the method includes: Receiving hybrid automatic repeat request HARQ-ACK feedback information corresponding to a physical shared channel, where the HARQ-ACK feedback information at least includes first HARQ-ACK feedback information corresponding to a first physical shared channel, and the first HARQ-ACK feedback information is HARQ-ACK feedback information determined before decoding of the first physical shared channel.

18. The method according to claim 17, wherein, The HARQ-ACK feedback information further includes second HARQ-ACK feedback information corresponding to a second physical shared channel, and the second HARQ-ACK feedback information is HARQ-ACK feedback information determined after decoding of the second physical shared channel.

19. The method according to claim 17, wherein The first HARQ-ACK feedback information is determined based on at least one of the following parameters: A first probability, where the first probability is the probability that the first physical shared channel is correctly decoded based on the demodulation reference signal DMRS of the first physical shared channel; A second probability, where the second probability is the probability that the first physical shared channel is incorrectly decoded based on the demodulation reference signal DMRS of the first physical shared channel; A third probability, where the third probability is the probability that the first physical shared channel is correctly decoded based on the DMRS of the physical control channel corresponding to the first physical shared channel; A fourth probability, where the fourth probability is the probability that the first physical shared channel is incorrectly decoded based on the DMRS of the physical control channel corresponding to the first physical shared channel; Channel quality information of the first preset number of channels before the first physical shared channel; Modulation and coding scheme MCS information corresponding to the first physical shared channel; Signaling indication of the second node; Channel quality information corresponding to the first physical shared channel; MCS matching degree information corresponding to the first physical shared channel, where the MCS matching degree information refers to at least one of the probability that the first physical shared channel is correctly decoded or the probability that the first physical shared channel is incorrectly decoded based on the MCS information corresponding to the first physical shared channel; Decoding status of the first preset number of physical shared channels before the first physical shared channel; Decoding status of the physical shared channels within the first preset duration before the first physical shared channel; or Channel quality information within the second preset duration before the first physical shared channel.

20. The method according to claim 17, wherein The first HARQ-ACK feedback information is determined based on the output information of an artificial intelligence (AI) model, and the output information of the AI model includes at least one of the following: The HARQ-ACK feedback information corresponding to the first physical shared channel predicted by the AI model; The probability that the first physical shared channel predicted by the AI model is correctly decoded; The probability that the first physical shared channel predicted by the AI model is incorrectly decoded; or The channel quality information corresponding to the first physical shared channel predicted by the AI model.

21. The method according to claim 18, wherein Receiving the HARQ-ACK feedback information corresponding to the physical shared channel includes: Receiving a HARQ-ACK codebook, where the HARQ-ACK codebook includes a plurality of bits, and each bit in the plurality of bits corresponds to one of the following: At least one first HARQ-ACK feedback information; or At least one second HARQ-ACK feedback information.

22. The method according to claim 18, wherein Receiving the HARQ-ACK feedback information includes: In a case where the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is different from the second HARQ-ACK feedback information corresponding to the physical shared channel, after receiving the first HARQ-ACK feedback information, receiving the second HARQ-ACK feedback information; or, In a case where the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is the same as the second HARQ-ACK feedback information corresponding to the physical shared channel, after receiving the first HARQ-ACK feedback information, not receiving the second HARQ-ACK feedback information; or, In a case where the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is a NACK message, and the second HARQ-ACK feedback information corresponding to the physical shared channel is an ACK, after receiving the first HARQ-ACK feedback information, not receiving the second HARQ-ACK feedback information; or, In a case where the first physical shared channel and the second physical shared channel are the same physical shared channel, and the first HARQ-ACK feedback information corresponding to the physical shared channel is an ACK message, and the second HARQ-ACK feedback information corresponding to the physical shared channel is a NACK, after receiving the first HARQ-ACK feedback information, receiving the second HARQ-ACK feedback information.

23. The method according to claim 17, wherein After receiving the HARQ-ACK feedback information corresponding to the physical shared channel, it further includes: Receiving first indication information, where the first indication information is used to indicate whether the first HARQ-ACK feedback information corresponding to the first physical shared channel is correct.

24. The method according to claim 18, further comprising: Send a second indication message, where the second indication message is used to indicate at least one of the following: Send the first HARQ-ACK feedback information; Send the second HARQ-ACK feedback information; Parameters for determining the first HARQ-ACK feedback information; or Output information of the AI model.

25. The method according to claim 20 further includes: Training the AI model based on sample information and sample labels of at least one sample; Wherein the sample information is related information of a physical shared channel within a historical time period, and the related information of the physical shared channel includes at least one of the following: The fourth preset number of channel quality information before the physical shared channel, the channel quality information within the third preset duration before the physical shared channel, the decoding result of the physical shared channel within the fourth preset duration before the physical shared channel, the MCS information corresponding to the physical shared channel, and the channel quality information corresponding to the physical shared channel; the sample label is the decoding result of the physical shared channel.

26. The method according to claim 25, wherein The channel quality information corresponding to the physical shared channel is determined based on at least one of the following: Channel quality information measured by DMRS of the physical shared channel; The fifth preset number of channel quality information before the physical shared channel; or Channel quality information measured by DMRS of the physical control channel corresponding to the physical shared channel.

27. The method according to claim 19, wherein The MCS information corresponding to the first physical shared channel includes at least one of the following: modulation method, code rate, spectral efficiency, or transport block size.

28. A communication device, comprising: A memory and a processor; The memory is coupled to the processor; The memory is used to store instructions executable by the processor; When the processor executes the instructions, it executes the method according to any one of claims 1 to 27.

29. A computer-readable storage medium, wherein, Computer instructions are stored on the computer-readable storage medium, and when the computer instructions run on the communication device, the communication device is caused to execute the method according to any one of claims 1 to 27.

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