Precoding matrix transmission method, communication device, storage medium and program product

Abstract

The embodiment of the invention provides a precoding matrix transmission method, a communication device, a storage medium and a program product, relates to the technical field of communication, and solves the problem that terminal equipment cannot flexibly report a precoding matrix. The method comprises the following steps: determining a sending mode of a first precoding matrix; the sending mode comprises a first sending mode and a second sending mode, and the first sending mode is a sending mode for sending full information of the first precoding matrix; the second sending mode is a sending mode for sending increment information of the first precoding matrix, and the increment information of the first precoding matrix is increment information of the first precoding matrix relative to the second precoding matrix; and sending the first precoding matrix to the second node based on the sending mode.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the field of communication technologies, and in particular, to a precoding matrix transmission method, a communication device, a storage medium, and a program product. Background Art

[0002] Currently, the methods for a terminal device to report a precoding matrix to a network device include incremental reporting and full reporting. Full reporting means that the terminal device reports the full information of the precoding matrix to the network device. Full reporting can enable the network device to obtain a more accurate precoding matrix, but requires more transmission resources when transmitting the precoding matrix. Incremental reporting means that the terminal device reports the incremental information of the precoding matrix to the network device. Incremental reporting can reduce the transmission resources required when transmitting the precoding matrix, but may cause the network device to be unable to accurately parse the current precoding matrix.

[0003] Although there are two methods for reporting the precoding matrix in related technologies, currently the terminal device can only fixedly adopt one of the methods to report the precoding matrix. Therefore, how to enable the terminal device to flexibly report the precoding matrix has become an urgent technical problem to be solved currently. Summary of the Invention

[0004] Embodiments of the present disclosure provide a precoding matrix transmission method, a communication device, a storage medium, and a program product, which solve the problem that the terminal device cannot flexibly report the precoding matrix.

[0005] On the one hand, a precoding matrix transmission method is provided, including: determining a sending method of a first precoding matrix; the sending method includes a first sending method and a second sending method, the first sending method is a sending method for sending the full information of the first precoding matrix; the second sending method is a sending method for sending the incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to a second precoding matrix; based on the sending method, sending the first precoding matrix to a second node.

[0006] On the other hand, a communication device is provided, including: a processing unit and a communication unit; the processing unit is configured to determine a sending method of a first precoding matrix; the sending method includes a first sending method and a second sending method, the first sending method is a sending method for sending the full information of the first precoding matrix; the second sending method is a sending method for sending the incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to a second precoding matrix; the communication unit is configured to send the first precoding matrix to a second node based on the sending method

[0007] On the one hand, a precoding matrix transmission method is provided, including: receiving information carrying a first precoding matrix sent by a first node, where the sending method of the first precoding matrix includes a first sending method and a second sending method. The first sending method is a sending method for sending all the information of the first precoding matrix; the second sending method is a sending method for sending incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to a second precoding matrix; obtaining the first precoding matrix from the information carrying the first precoding matrix according to the sending method of the first precoding matrix.

[0008] On the other hand, a communication device is provided, including: a communication unit; the communication unit is configured to receive a first precoding matrix sent by a first node, where the sending method of the first precoding matrix includes a first sending method and a second sending method. The first sending method is a sending method for sending all the information of the first precoding matrix; the second sending method is a sending method for sending incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to a second precoding matrix.

[0009] On yet another hand, a communication device is provided, including: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; when the processor executes the computer program, the precoding matrix transmission method of any one of the above embodiments is implemented.

[0010] On yet another hand, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the precoding matrix transmission method of any one of the above embodiments is implemented.

[0011] On yet another hand, a computer program product is provided, which includes computer program instructions. When the computer program instructions are executed by a processor, the precoding matrix transmission method of any one of the above embodiments is implemented.

[0012] Embodiments of the present disclosure provide a precoding matrix transmission method. The first node first determines whether to send all the information of the first precoding matrix or send incremental information of the first precoding matrix. After that, the first node sends the first precoding matrix to the second node based on the determined method. Based on this, the first node can flexibly select a suitable sending method to send the first precoding matrix to the second node according to actual transmission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0014] Figure 2 is a schematic flowchart of a precoding matrix transmission method provided by an embodiment of the present disclosure;

[0015] Figure 3 Schematic flowchart of yet another precoding matrix transmission method provided by an embodiment of the present disclosure;

[0016] Figure 4 Schematic flowchart of yet another precoding matrix transmission method provided by an embodiment of the present disclosure;

[0017] Figure 5 Schematic flowchart of yet another precoding matrix transmission method provided by an embodiment of the present disclosure;

[0018] Figure 6 Schematic flowchart of yet another precoding matrix transmission method provided by an embodiment of the present disclosure;

[0019] Figure 7 Schematic flowchart of yet another precoding matrix transmission method provided by an embodiment of the present disclosure;

[0020] Figure 8 Schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0021] Figure 9 Schematic structural diagram of yet another communication device provided by an embodiment of the present disclosure;

[0022] Figure 10 Schematic hardware structure diagram of a communication device provided by an embodiment of the present disclosure. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part rather than all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the embodiments of the present disclosure.

[0024] It should be noted that in the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to represent examples, illustrations or descriptions. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0025] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0026] In the description of the embodiments of the present disclosure, unless otherwise specified, " / " means "or". For example, A / B may represent A or B. Herein, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality of" means two or more.

[0027] Hereinafter, the related technologies involved in the embodiments of the present disclosure will be explained first.

[0028] In the related art, when a terminal device and a network device communicate, since the channel between the terminal device and the network device constantly changes, the network device sends a reference signal to the terminal device, and the terminal device periodically / aperiodically measures the reference signal sent by the network device to determine the channel state information between the terminal device and the network device. The terminal device generates a channel state information report (which may also be simply referred to as a report in the present disclosure) based on the channel state information and sends the channel state information report to the network device. The channel state information report carries a precoding matrix determined by the terminal device according to the channel state information. After receiving the channel state information report from the terminal device, the network device performs data transmission with the terminal device based on the precoding matrix in the channel state information report.

[0029] In some embodiments, when the terminal device sends a precoding matrix to the network device, it is implemented by sending precoding matrix information to the network device, and the precoding matrix information is an expression form of the precoding matrix.

[0030] In some embodiments, the reference signal sent by the network device to the terminal device is a downlink reference signal. In different communication systems, the downlink reference signal can be different signals. For example, in a Long Term Evolution (LTE) system, the downlink reference signals include: cell-specific reference signal (CRS), and channel-state information reference signal (CSI-RS). In a New Radio (NR) system, the downlink reference signal for channel state information reporting includes: CSI-RS. CSI-RS is carried in a channel-state information reference signal resource (CSI-RS resource), and the channel-state information reference signal resource is usually composed of code division multiplexing (CDM) groups. A CDM group is composed of radio resource elements, and the CSI-RS of a group of CSI-RS ports is multiplexed on the CSI-RS ports in a code division multiplexing manner.

[0031] Currently, the methods for the terminal device to send a precoding matrix to the network device include full reporting and incremental reporting. Among them, full reporting means that the terminal device reports the full information of the precoding matrix to the network device. Full reporting can enable the network device to obtain a more accurate precoding matrix, but requires more transmission resources when transmitting the precoding matrix. Since the terminal device usually measures the reference signal multiple times and reports the precoding matrix multiple times, therefore, when the terminal device adopts the full reporting method, it will cause more transmission resources to be occupied when sending the precoding matrix.

[0032] Incremental reporting means that the terminal device reports the incremental information of the precoding matrix to the network device. The network device determines the current complete precoding matrix (i.e., the full information of the precoding matrix) based on the incremental information of the precoding matrix and the previously resolved precoding matrix. Incremental reporting can reduce the transmission resources required when transmitting the precoding matrix, but may cause the network device to be unable to accurately resolve the current precoding matrix.

[0033] For example, when the terminal device reports the precoding matrix to the network device for the first time, it reports the full information of the first precoding matrix, and the network device determines the complete precoding matrix based on the full information of the precoding matrix. When reporting the precoding matrix to the network device for the second time, the terminal device reports the incremental information of the second precoding matrix relative to the first precoding matrix to the network device. The network device determines the complete second precoding matrix based on the received incremental information and the full information of the first precoding matrix. Similarly, when reporting the precoding matrix to the network device for the nth time, the terminal device reports the incremental information of the nth precoding matrix relative to the n-1th (or nbth, the embodiment of the present disclosure does not limit this, b is an integer less than n) precoding matrix to the network device. The network device determines the complete nth precoding matrix based on the received incremental information and the full information of the n-1th (or nbth) precoding matrix. n is a positive integer.

[0034] Since in the incremental reporting process, the network device obtains the precoding matrix reported each time depending on the previously determined precoding matrix, if the network device fails to correctly parse the precoding matrix at a certain time, it may cause the network device to fail to correctly parse the precoding matrix after that time.

[0035] For example, when reporting the precoding matrix to the network device for the nth time, the terminal device fails to successfully send the nth precoding matrix to the network device, or the network device fails to successfully parse the nth precoding matrix. Then, at the n+1th time, the network device will not be able to determine the n+1th precoding matrix based on the nth precoding matrix and the incremental information obtained at the n+1th time, and the subsequent n+2th time, etc., will also fail to correctly parse the precoding matrix.

[0036] From the above description, it can be seen that the current methods for terminal devices to report precoding matrices to network devices include incremental reporting and full reporting. Full reporting refers to the terminal device reporting the full information of the precoding matrix to the network device. Full reporting can enable the network device to obtain a more accurate precoding matrix, but more transmission resources are required when transmitting the precoding matrix. Incremental reporting refers to the terminal device reporting incremental information of the precoding matrix to the network device. Incremental reporting can reduce the transmission resources required when transmitting the precoding matrix, but it may cause the network device to be unable to accurately parse the current precoding matrix.

[0037] Although there are two ways to report the precoding matrix in the related art, the current terminal device can only adopt one of the two ways to report the precoding matrix. Therefore, how to enable the terminal device to flexibly report the precoding matrix has become a technical problem that needs to be solved urgently.

[0038] To solve the above technical problems, embodiments of the present disclosure provide a method for transmitting a precoding matrix. The first node first determines whether to transmit the full information of the first precoding matrix or the incremental information of the first precoding matrix. After that, the first node transmits the first precoding matrix to the second node based on the determined method. Based on this, the first node can flexibly select an appropriate transmission method according to the actual transmission requirements to transmit the first precoding matrix to the second node.

[0039] The method for transmitting a precoding matrix provided by the embodiments of the present disclosure can be applied to a communication system 10 such as Figure 1 shown in Figure 1 The communication system 10 includes: a first node 101 and a second node 102.

[0040] Among them, the second node 102 is used to send a reference signal to the first node 101. The first node 101 is used to measure the reference signal sent by the second node 102, determine the channel state information between the first node 101 and the second node 102, and send a channel state information report to the network device after generating a channel state information report according to the channel state information. The channel state information report includes the precoding matrix determined by the first node 101.

[0041] In some embodiments, the first node 101 also determines the transmission method for transmitting the precoding matrix to the second node 102. The transmission methods include two types: incremental transmission and full - quantity transmission. The first node 101 transmits the precoding matrix to the second node 102 according to the determined transmission method. For example, when the first node 101 determines the transmission method as incremental transmission, it transmits the incremental information of the precoding matrix to the second node 102. When the first node 101 determines the transmission method as full - quantity transmission, it transmits the full information of the precoding matrix to the second node 102.

[0042] In the embodiments of the present disclosure, the first node and the second node can communicate through a wireless channel. For example, the first node is a terminal device, the second node is a network device, and the network device and the terminal device communicate through a wireless channel. Another example is that the first node is a terminal device, the second node is a wireless router, and the wireless router and the terminal device communicate through a wireless channel. Another example is that the first node is a first network device, the second node is a second network device, and the first network device and the second network device communicate through a wireless channel. Another example is that the first node is a first terminal device, the second node is a second terminal device, and the first terminal device and the second terminal device communicate through a wireless channel. Another example is that the first node is a repeater, the second node is a network device, and the network device and the repeater communicate through a wireless channel. Another example is that the first node is a terminal device, the second node is a repeater, and the repeater and the terminal device communicate through a wireless channel.

[0043] For another example, the first node is the first repeater, the second node is the second repeater, and the first repeater communicates with the second repeater through a wireless channel. For another example, the first node is a network device, the second node is a satellite, and the satellite communicates with the network device through a wireless channel. For another example, the first node is a satellite, the second node is a network device, and the network device communicates with the satellite through a wireless channel. For another example, the first node is a terminal device, the second node is a satellite, and the satellite communicates with the terminal device through a wireless channel. For another example, the first node is a satellite, the second node is a terminal device, and the terminal device communicates with the satellite through a wireless channel. For another example, the first node is a ground device, the second node is an aircraft, and the aircraft communicates with the ground device through a wireless channel. For another example, the first node is the first aircraft, the second node is the second aircraft, and the first aircraft communicates with the second aircraft through a wireless channel.

[0044] It should be noted that Figure 1 it is only an exemplary framework diagram, Figure 1 the number of devices included therein, and the names of each device are not limited, and in addition to Figure 1 the devices shown, the communication system may further include other devices.

[0045] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and service scenarios described in the embodiments of the present disclosure are for more clearly explaining 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 of ordinary skill in the art know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0046] Next, the precoding matrix transmission method provided by the embodiments of the present disclosure will be introduced in detail with reference to the accompanying drawings.

[0047] Figure 2 It is a schematic flowchart of a precoding matrix transmission method applied to a first node provided by an embodiment of the present disclosure. In the embodiment of the present disclosure, the first node determines whether the sending method of the first precoding matrix is an incremental sending method or a full sending method. After that, the first node sends the first precoding matrix to the second node based on the determined sending method. Hereinafter, the functions and operations performed by each device in the communication system provided by the embodiments of the present disclosure will be introduced. As Figure 2 shown, the precoding matrix transmission method includes the following steps:

[0048] Step 201: The first node determines the sending method of the first precoding matrix.

[0049] Among them, the sending methods include a first sending method and a second sending method. The first sending method is a sending method for sending all the information of the first precoding matrix. The second sending method is a sending method for sending the incremental information of the first precoding matrix. The incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to the second precoding matrix. The incremental information of the first precoding matrix can be obtained by jointly processing the first precoding matrix and the second precoding matrix. In contrast to the incremental information, the all information of the first precoding matrix does not need to be obtained from jointly processing the first precoding matrix and the second precoding matrix. The all information of the first precoding matrix only includes the first precoding matrix and does not include the second precoding matrix.

[0050] In some embodiments, the second precoding matrix is a precoding matrix among at least one precoding matrix that has been sent to the second node.

[0051] In some embodiments, the first node measures the reference signals sent by the second node to determine the precoding matrix for data transmission between the first node and the second node. After that, the first node determines whether to adopt the first sending method or the second sending method based on the precoding matrix and the transmission requirements of the first node and the second node.

[0052] For example, the first node can determine the sending method of the first precoding matrix based on the magnitude of the change of the first precoding matrix relative to the precoding matrix that has been sent.

[0053] When the change of the first precoding matrix relative to the precoding matrix that has been sent is small, for example, only a few matrix elements are changed, the first node determines that the second sending method can be adopted to send the incremental information of the first precoding matrix to the second node. At this time, the first node only sends the index values of the changed matrix elements and the changed element values to the second node. After receiving the incremental information of the first precoding matrix, the second node updates the matrix elements at the corresponding index value positions in the second precoding matrix based on the incremental information to obtain the first precoding matrix. In this process, the first node does not need to transmit the complete first precoding matrix to the second node, thereby reducing the resource overhead when the first node sends the first precoding matrix to the second node.

[0054] If the first precoding matrix varies greatly from the precoding matrix that has been transmitted, for example, most of the matrix elements need to be recalculated or the entire precoding matrix needs to be recalculated, then the first node determines that the first full - amount information of the precoding matrix can be sent to the second node by using the first transmission method. After receiving the full - amount information of the first precoding matrix, the second node determines the first precoding matrix based on the full - amount information of the first precoding matrix. In this process, the second node can obtain all the element information of the first precoding matrix, making the first precoding matrix determined by the second node more accurate and comprehensive, thereby improving the communication quality between the first node and the second node.

[0055] It should be noted that in the embodiments of the present disclosure, the first node can also determine the method of sending the first precoding matrix based on other parameters. Specifically, refer to the following description. The embodiments of the present disclosure will not elaborate on this.

[0056] Step 202: The first node sends the first precoding matrix to the second node based on this transmission method.

[0057] In some embodiments, if the first node determines that the transmission method of the first precoding matrix is the first transmission method, then the first node sends the full - amount information of the first precoding matrix to the second node. If the first node determines that the transmission method of the first precoding matrix is the second transmission method, then the first node sends the incremental information of the first precoding matrix relative to the second precoding matrix to the second node.

[0058] The embodiments of the present disclosure provide a method for transmitting a precoding matrix. The first node first determines whether to send the full - amount information of the first precoding matrix or the incremental information of the first precoding matrix. After that, the first node sends the first precoding matrix to the second node based on the determined method. Based on this, the first node can flexibly select a suitable transmission method to send the first precoding matrix to the second node according to the actual transmission requirements.

[0059] The first node can flexibly select whether to send the full - amount information or the incremental information of the precoding matrix according to the current transmission requirements, thereby achieving the effect of improving the transmission efficiency and resource utilization rate while ensuring the communication quality.

[0060] In the embodiments of the present disclosure, when the transmission mode of the first precoding matrix is the second transmission mode, the first node may further indicate to the second node other parameters related to calculating the first precoding matrix, so that the second node can determine the first precoding matrix more accurately or efficiently. The content indicated by the first node to the second node includes but is not limited to: Scenario 1: The first node indicates a reference precoding matrix to the second node; Scenario 2: The first node indicates a candidate reference precoding matrix to the second node; Scenario 3: The first node indicates the transmission mode of the first precoding matrix to the second node. Hereinafter, Scenario 1, Scenario 2, and Scenario 3 will be described in detail respectively.

[0061] Scenario 1: The first node indicates a reference precoding matrix to the second node

[0062] Among them, the reference precoding matrix is the second precoding matrix recorded in step 201 above. In other words, in combination with Figure 2 , as Figure 3 shown, Scenario 1 can be implemented through the following step 301.

[0063] Step 301: The first node sends a first indication message to the second node. The first indication message is used to indicate the second precoding matrix.

[0064] In the embodiments of the present disclosure, after generating the first precoding matrix, the first node may determine the transmission mode of the first precoding matrix based on the change amount between the first precoding matrix and the historical precoding matrix (i.e., the precoding matrix that has been sent to the second node). In order to minimize the incremental information transmitted during incremental transmission, the first node may select a historical precoding matrix with a high similarity to the first precoding matrix from the historical precoding matrices. For example, the first node may compare the first precoding matrix with the Z (Z is a positive integer) most recently sent precoding matrices respectively, and use the historical precoding matrix with the smallest relative change amount of the first precoding matrix as the second precoding matrix. At this time, the first node needs to report less incremental information of the first precoding matrix, thereby reducing the resource overhead of the first precoding matrix sent by the first node to the second node and improving the reliability of sending the first precoding matrix.

[0065] After the first node determines the second precoding matrix and indicates it to the second node, the second node can accurately know the second precoding matrix determined by the first node, and further the second node can determine the first precoding matrix according to the second precoding matrix and the incremental information of the first precoding matrix relative to the second precoding matrix.

[0066] In some embodiments, the first indication message includes at least one of the following: an identifier of the second precoding matrix; a measurement time of the first reference signal; the second precoding matrix is obtained by measuring the first reference signal.

[0067] In other words, in the embodiments of the present disclosure, the first node may indicate the second precoding matrix to the second node by indicating the identifier of the second precoding matrix; alternatively, the first node may also indicate the second precoding matrix by indicating the measurement time of the first reference signal.

[0068] It can be understood that the first node can obtain the precoding matrix after measuring the reference signal. Therefore, there is a corresponding relationship between the reference signal and the precoding matrix. Thus, the first node can indirectly indicate the second precoding matrix obtained by measuring the first reference signal by indicating the measurement time of the first reference signal. The second node can determine the second precoding matrix indicated by the first node according to the corresponding relationship between the precoding matrix and the measurement time, and the measurement time indicated by the first node.

[0069] Optionally, the identifier of the second precoding matrix in the embodiments of the present disclosure may be: the number of the second precoding matrix, the number of reporting intervals of the second precoding matrix relative to the first precoding matrix, the reporting interval time of the second precoding matrix relative to the first precoding matrix, etc. The embodiments of the present disclosure do not limit this.

[0070] In some embodiments, the first indication information may be carried in the same message as the incremental information of the first precoding matrix sent by the first node to the second node (for example, both are carried in the channel state information report sent by the first node to the second node), or the first indication information may be carried in a different message from the incremental information of the first precoding matrix. The embodiments of the present disclosure do not limit this.

[0071] Scenario 2: The first node indicates the candidate reference precoding matrix to the second node

[0072] In some embodiments, the first node indicates the reference precoding matrix to the second node, but the second node may not correctly receive (or parse) the reference precoding matrix. At this time, even if the first node indicates the reference precoding matrix to the second node, the second node cannot determine the first precoding matrix according to the reference precoding and the incremental information of the first precoding matrix. Therefore, the first node may also indicate the candidate reference precoding matrix to the second node. At this time, even if the second node does not successfully receive the reference precoding matrix, it can determine the currently required precoding matrix according to the candidate reference precoding matrix indicated by the first node and the incremental information of the first precoding matrix.

[0073] It should be noted that the precoding matrix determined by the second node based on the reference precoding matrix may be different from the precoding matrix determined by the second node based on the candidate reference precoding matrix. Therefore, embodiments of the present disclosure may select a historical precoding matrix with a high similarity to the reference precoding matrix as the candidate precoding matrix to improve the accuracy of the precoding matrix determined by the second node based on the reference precoding matrix.

[0074] Among them, the above candidate reference precoding matrix may also be referred to as the third precoding matrix. In other words, as Figure 3 shown, scenario 2 can be specifically implemented through the following step 302.

[0075] Step 302: The first node sends second indication information to the second node.

[0076] Among them, the second indication information is used to indicate M third precoding matrices. The third precoding matrix includes the precoding matrices among at least one precoding matrix that has been sent to the second node and has a replacement relationship with the second precoding matrix. M is a positive integer.

[0077] In some embodiments, the second indication information includes at least one of the following: the identifier of the third precoding matrix, the measurement time of the second reference signal. The third precoding matrix is obtained by measuring the second reference signal.

[0078] For the understanding of the identifier of the third precoding matrix and the measurement time of the second reference signal, reference may be made to the identifier of the second precoding matrix and the measurement time of the first reference signal above, which will not be elaborated here.

[0079] In a possible implementation, the second indication information may be carried in the same message as the incremental information of the first precoding matrix sent by the first node to the second node; the second indication information may also be carried in a different message from the incremental information of the first precoding matrix. Embodiments of the present disclosure do not make any limitations in this regard.

[0080] Furthermore, in combination with the first indication information, the first indication information, the second indication information, and the incremental information of the first precoding matrix in embodiments of the present disclosure may all be carried in the same message; or, the first indication information and the incremental information of the first precoding matrix are carried in the same message, and the second indication information is carried in a different message; or, the second indication information and the incremental information of the first precoding matrix are carried in the same message, and the first indication information is carried in a different message; or, the first indication information and the second indication information are carried in the same message, and the incremental information of the first precoding matrix is carried in a different message. Embodiments of the present disclosure do not make any limitations in this regard.

[0081] In some embodiments, the first node may select one or more candidate reference precoding matrices from historical precoding matrices to improve the success rate of the second node in determining the current precoding matrix. At this time, the first node may indicate the number of candidate reference precoding matrices to the second node, so that the second node can determine the candidate reference precoding matrices according to the number of candidate reference precoding matrices. This process may be specifically implemented through the content described in Scenario 2.1 below.

[0082] Scenario 2.1: The first node indicates the number of candidate reference precoding matrices to the second node.

[0083] In some embodiments, as Figure 3 shown, in combination with the above step 302, Scenario 2.1 may be specifically implemented through the following step 303.

[0084] Step 303: The first node sends third indication information to the second node. The third indication information is used to indicate the value of M.

[0085] In the embodiments of the present disclosure, the first node indicates that the number of third precoding matrices to the second node is M. The second node may determine M third precoding matrices based on the number of third precoding matrices.

[0086] For example, the second node uses the precoding matrices in the M historical reports closest to the currently reported one as candidate reference precoding matrices. Or, the second node uses the precoding matrices in the M historical reports closest to the currently reported one excluding the reference precoding matrix as candidate reference precoding matrices. Or, the second node uses the M historical times closest to the time corresponding to the currently reported one as candidate reference times. Or, the second node uses the M historical times closest to the time corresponding to the currently reported one excluding the reference time as candidate reference times.

[0087] The first node indicates the number of candidate reference precoding matrices or the number of candidate reference times to the second node, and the first node may flexibly determine the number of candidate reference precoding matrices or the number of candidate reference times according to the channel conditions, thereby improving the reliability of the second node in parsing the precoding matrices in the current report and subsequent reports.

[0088] Another example, the first node indicates the number of candidate reference precoding matrices or the number of candidate reference times to the second node, and indicates the candidate reference precoding matrices or candidate reference times, so that the second node can determine the candidate reference precoding matrices or candidate reference times based on the number indicated by the first node.

[0089] In a possible implementation manner, as Figure 3 shown, before step 302, the method further includes:

[0090] Step 304: The first node receives fourth indication information from the second node. The fourth indication information is used to indicate the value of M.

[0091] In some embodiments, the fourth indication information may be carried in the configuration information sent by the second node to the first node, and the configuration information is used to configure the value of M for the first node.

[0092] Based on this, the second node can pre-determine the number of candidate reference precoding matrices that the second node can support according to its own capability information.

[0093] For example, the second node can flexibly determine the number of subsequent reference precoding matrices according to parameters such as its own storage capacity and computing power status. For example, when the second node can only store 5 precoding matrices, in addition to the reference precoding matrix, the second node can only store 4 candidate precoding matrices. At this time, the value of M indicated to the first node is 4. After receiving this indication, the first node selects 4 candidate precoding matrices from the historical precoding matrices.

[0094] It should be noted that in the embodiments of the present disclosure, the number of candidate reference precoding matrices indicated by the second node to the first node may be the same as or different from the number of candidate reference precoding matrices actually determined by the first node, and the present disclosure does not limit this. When the first node selects less than 4 candidate precoding matrices, the first node can indicate the number of actually selected candidate precoding matrices to the second node in the manner described in step 303 above. For example, if the first node selects 3 candidate reference precoding matrices, the first node indicates that the number of actually selected candidate reference precoding matrices by the first node is 3.

[0095] In the embodiments of the present disclosure, the reference precoding matrix of the second node is different from the precoding matrix calculated according to the candidate reference precoding matrix, which will affect the subsequent selected coding and modulation methods. To reduce the influence of the error when the second node calculates the current precoding matrix according to the candidate precoding matrix on the subsequent process, the first node can calculate the channel quality adjustment value corresponding to the candidate reference precoding matrix and the reference precoding matrix, and indicate this value to the second node. This process can be specifically implemented through the following scenario 2.2:

[0096] Scenario 2.2: The first node indicates the channel quality adjustment value of the candidate precoding matrix to the second node.

[0097] In Scenario 2.2, the channel quality adjustment value of the candidate precoding matrix may be carried in the fifth indication information. At this time, as Figure 3 shown, Scenario 2.2 can be specifically implemented through the following step 305:

[0098] Step 305: The first node sends fifth indication information to the second node.

[0099] The fifth indication information is used to indicate the channel quality adjustment value of each third precoding matrix. The channel quality adjustment value of a third precoding matrix is determined according to the channel quality corresponding to the second precoding matrix and the channel quality corresponding to a third precoding matrix.

[0100] In some embodiments, the channel quality adjustment value is the adjustment value of the channel quality indication (CQI). In other words, the first node sends the CQI deviation value corresponding to each candidate reference precoding matrix to the second node. After receiving the CQI deviation value corresponding to the candidate reference precoding matrix, if the candidate reference precoding matrix is used when determining the current precoding matrix, the second node further determines the CQI deviation value corresponding to the candidate reference precoding matrix used this time, and then based on this CQI deviation value, determines subsequent coding, modulation, etc. Based on this, when the second node determines the current precoding matrix through the candidate precoding matrix, it can select an appropriate coding and modulation method based on the CQI deviation value corresponding to the candidate precoding matrix to improve the transmission quality between the first node and the second node.

[0101] Scenario 3: The first node indicates the sending method of the first precoding matrix to the second node.

[0102] In Scenario 3, the sending method of the first precoding matrix can be carried in the eighth indication information. At this time, as Figure 3 shown, Scenario 3 can be specifically implemented through the following Step 306:

[0103] Step 306: The first node sends the eighth indication information to the second node. The eighth indication information is used to indicate the sending method of the first precoding matrix.

[0104] In the embodiments of the present disclosure, after determining the sending method of the first precoding matrix, the first node can use the eighth indication information to indicate the method of the first precoding matrix to the second node. After receiving the eighth indication information, the second node can determine the first precoding matrix in a corresponding manner according to the sending method indicated by the eighth indication information.

[0105] As above, in combination with specific scenarios, the first node's indication to the second node of other parameters related to calculating the first precoding matrix is described.

[0106] Next, in combination with the above Step 201, the process of the first node determining the first precoding matrix will be described in detail.

[0107] In an embodiment of the present disclosure, the transmission mode of the first precoding matrix may be determined based on one or more of the following parameters: the coding rate used to transmit the first precoding matrix, the number of resources configured for transmitting the first precoding matrix, the time domain channel property (TDCP) of the channel between the first node and the second node, the serial number corresponding to the first precoding matrix, and the response message of the second node to the fourth precoding matrix. The fourth precoding matrix includes one or more of at least one precoding matrix transmitted to the second node before the current time.

[0108] In other words, the transmission mode of the first precoding matrix may be determined based on the following methods: Method 1, determined based on the coding rate used to transmit the first precoding matrix; Method 2, determined based on the number of resources configured for transmitting the first precoding matrix; Method 3, determined based on the TDCP between the first node and the second node; Method 4, determined based on the serial number corresponding to the first precoding matrix; Method 5, determined based on the response message of the second node to the fourth precoding matrix. The following will explain the above Methods 1 to 5 in detail:

[0109] Method 1: Determine the transmission mode of the first precoding matrix based on the coding rate used to transmit the first precoding matrix.

[0110] The coding rate, also known as the coding efficiency, refers to the ratio of the information bits to the code group symbols during the coding process. Generally speaking, the larger the coding rate, the larger the proportion of information bits. When the message length is the same, the larger the coding rate, the more information bits for transmitting information in the message, and the higher the transmission efficiency. Therefore, when the coding rate of the first precoding matrix is relatively large, it is usually applicable to the first transmission mode. The smaller the coding rate, the smaller the proportion of information bits. When the message length is the same, the smaller the coding rate, the fewer information bits for transmitting information in the message, and the lower the transmission efficiency. However, at this time, the transmission reliability of the message is higher. Therefore, when the coding rate of the first precoding matrix is relatively small, it is usually applicable to the second transmission mode.

[0111] In an embodiment of the present disclosure, the first node may determine the transmission mode of the first precoding matrix based on the coding rate used to transmit the first precoding matrix.

[0112] For example, when the coding rate used to transmit the first precoding matrix is greater than the first threshold value, more information can be used when transmitting the first precoding matrix. Correspondingly, more information of the first precoding matrix (such as the element values of the matrix) can be transmitted. At this time, the first node determines to use the first transmission mode to transmit the first precoding matrix. In other words, when the coding rate used to transmit the first precoding matrix is greater than the first threshold value, the first node transmits the full amount of information of the first precoding matrix to the second node.

[0113] When the coding rate used for transmitting the first precoding matrix is less than or equal to the first threshold value, less information can be used when transmitting the first precoding matrix. Correspondingly, less information about the first precoding matrix that can be transmitted (such as the element values of the matrix) is also available. At this time, the first node determines to use the second transmission method to transmit the first precoding matrix. In other words, when the coding rate used for transmitting the first precoding matrix is less than or equal to the first threshold value, the first node sends the incremental information of the first precoding matrix to the second node.

[0114] It should be noted that the first node can determine the threshold value of the coding rate used for transmitting the first precoding matrix (denoted as the second threshold value). When the first node determines the transmission method of the first precoding matrix based on the coding rate used for transmitting the first precoding matrix, the first node can determine the transmission method of the first precoding matrix by comparing the magnitudes of the first threshold value and the second threshold value. For example, when the second threshold value is greater than the first threshold value, the first node determines to use the first transmission method to transmit the first precoding matrix. When the second threshold value is less than or equal to the first threshold value, the first node determines to use the second transmission method to transmit the first precoding matrix.

[0115] In some embodiments, the first node can determine the magnitude of the first threshold value in multiple ways. For example, the first node can determine the magnitude of the first threshold value according to the indication of the second node; or, the first node can determine the magnitude of the first threshold value according to the number of antenna ports for transmitting the first precoding matrix. In addition, the first node can also determine the magnitude of the first threshold value through other means, and the embodiments of the present disclosure do not limit this.

[0116] When the first node determines the magnitude of the first threshold value according to the indication of the second node, the second node determines the first threshold value according to its own transmission requirements and indicates this first threshold value to the first node. In this way, the second node can indicate the first threshold value required by the second node to the first node according to its own transmission requirements.

[0117] When the first node determines the magnitude of the first threshold value according to the number of antenna ports for transmitting the first precoding matrix, different first threshold values corresponding to different numbers of antenna ports are pre-configured in the first node. For example, when the number of antenna ports is 1, it corresponds to the first threshold value #1; when the number of antenna ports is 2, it corresponds to the first threshold value #2;...; when the number of antenna ports is c, it corresponds to the first threshold value #c, where c is a positive integer. At this time, the first node determines the corresponding first threshold value according to the number of antenna ports for transmitting the first precoding matrix.

[0118] In addition, the second node may also indicate to the first node the coding rate expected by the second node for transmitting the first precoding matrix, so that the first node determines the coding rate used for transmitting the first precoding matrix according to the indication of the second node. After that, the first node determines the sending manner of the first precoding matrix based on the coding rate indicated by the second node.

[0119] Method 2: Determine the sending manner of the first precoding matrix based on the number of resources configured for sending the first precoding matrix.

[0120] When the number of resources configured for sending the first precoding matrix is large, the number of information bits in the transmission message used by the first node to send the first precoding matrix is also large. At this time, the first node can fully utilize the number of resources configured for sending the first precoding matrix by sending the full amount of information of the first precoding matrix to the second node. When the number of resources configured for sending the first precoding matrix is small, the number of information bits in the transmission message used by the first node to send the first precoding matrix is also small. At this time, the first node sends incremental information of the first precoding matrix to the second node, which can avoid the situation where the first precoding matrix cannot be transmitted due to insufficient resources and reduce the amount of resources consumed for transmitting the first precoding matrix.

[0121] In the embodiments of the present disclosure, the first node may determine the sending manner of the first precoding matrix based on the number of resources configured for sending the first precoding matrix.

[0122] When the number of resources configured for sending the first precoding matrix is greater than a third threshold, more information bits can be used when sending the first precoding matrix. Correspondingly, more information of the first precoding matrix (such as the element values of the matrix) can be transmitted. At this time, the first node determines to use the first sending manner to send the first precoding matrix. In other words, when the number of resources configured for sending the first precoding matrix is greater than the third threshold, the first node sends the full amount of information of the first precoding matrix to the second node.

[0123] When the number of resources configured for sending the first precoding matrix is less than or equal to the third threshold, fewer information bits can be used when sending the first precoding matrix. Correspondingly, less information of the first precoding matrix (such as the element values of the matrix) can be transmitted. At this time, the first node determines to use the second sending manner to send the first precoding matrix. In other words, when the number of resources configured for sending the first precoding matrix is less than or equal to the third threshold, the first node sends incremental information of the first precoding matrix to the second node.

[0124] It should be noted that at the first node, a threshold value (denoted as the fourth threshold value) for determining the number of resources for transmitting the first precoding matrix configuration can be determined. When the first node determines the transmission mode of the first precoding matrix based on the number of resources for transmitting the first precoding matrix configuration, the first node can determine the transmission mode of the first precoding matrix by comparing the magnitudes of the third threshold value and the fourth threshold value. For example, when the fourth threshold value is greater than the third threshold value, the first node determines to use the first transmission mode to transmit the first precoding matrix. When the fourth threshold value is less than or equal to the third threshold value, the first node determines to use the second transmission mode to transmit the first precoding matrix.

[0125] In some embodiments, the first node can determine the magnitude of the third threshold value in multiple ways. For example, the first node can determine the magnitude of the third threshold value according to the indication of the second node; or, the first node can determine the magnitude of the third threshold value according to the number of antenna ports for transmitting the first precoding matrix. In addition, the first node can also determine the magnitude of the third threshold value by other means, which is not limited in the embodiments of the present disclosure.

[0126] When the first node determines the magnitude of the third threshold value according to the indication of the second node, the second node determines the third threshold value according to its own transmission requirements and indicates the third threshold value to the first node. In this way, the second node can indicate the third threshold value required by the second node to the first node according to its own transmission requirements.

[0127] When the first node determines the magnitude of the third threshold value according to the number of antenna ports for transmitting the first precoding matrix, different third threshold values corresponding to different numbers of antenna ports are pre-configured in the first node. For example, when the number of antenna ports is 1, the corresponding third threshold value is #1; when the number of antenna ports is 2, the corresponding third threshold value is #2; ……; when the number of antenna ports is c (c is a positive integer), the corresponding third threshold value is #c. At this time, the first node determines the corresponding third threshold value according to the number of antenna ports for transmitting the first precoding matrix.

[0128] In addition, the second node can also indicate to the first node the number of resources expected to be used for transmitting the first precoding matrix, so that the first node determines the number of resources used for transmitting the first precoding matrix according to the indication of the second node. After that, the first node determines the transmission mode of the first precoding matrix based on the number of resources indicated by the second node.

[0129] Method 3: Determine the transmission mode of the first precoding matrix based on the TDCP between the first node and the second node.

[0130] The value of TDCP is used to identify the time-domain correlation of a channel, which characterizes the influence on a signal during transmission as it changes over time, such as the impact of signal attenuation, multipath effects, interference, etc. on the signal during the signal process. For example, the time-domain correlation coefficient of the channel is used as the value of TDCP for the time-domain channel attribute, or the magnitude of the time-domain correlation coefficient of the channel is used as the value of TDCP for the time-domain channel attribute. Generally speaking, the closer the value of TDCP is to 1, the stronger the time-domain correlation of the channel; the farther the value of TDCP is from 1, the weaker the time-domain correlation of the channel. Among them, the value range of TDCP is between (0, 1).

[0131] In the embodiments of the present disclosure, the first node may determine the transmission mode of the first precoding matrix based on the TDCP value between the first node and the second node.

[0132] For example, when the TDCP value is greater than the fifth threshold, the first node determines to send the first precoding matrix according to the second transmission mode. When the TDCP value is large, it indicates that the precoding matrices at different times with strong channel time-sequence correlation usually change less. The first node determines that the transmission mode of the first precoding matrix is the second transmission mode. At this time, sending the first precoding matrix based on the second transmission mode can reduce the resource overhead required to transmit the first precoding matrix without affecting the communication quality.

[0133] When the value of TDCP of the first node is less than or equal to the fifth threshold, the first precoding matrix is sent according to the first transmission mode. When the value of TDCP is small, it indicates that the channel time-sequence correlation is weak, and the precoding matrices at different times usually change greatly. At this time, the first node determines that the transmission mode of the first precoding matrix is the first transmission mode. At this time, sending the first precoding matrix based on the first transmission mode can enable the second node to obtain more comprehensive first precoding matrix information. Based on this, the second node can reconstruct the precoding matrix more accurately.

[0134] In some other embodiments, the first node sets two thresholds for the TDCP value, namely the sixth threshold and the seventh threshold. The sixth threshold is greater than the seventh threshold. When the TDCP value is greater than the sixth threshold, the first node determines to send the first precoding matrix according to the second transmission mode. When the value of TDCP is less than or equal to the seventh threshold, the first node sends the first precoding matrix according to the first transmission mode. When the value of TDCP is less than or equal to the sixth threshold and greater than the seventh threshold, the transmission mode of the first precoding matrix is determined based on the channel quality indication value.

[0135] It should be noted that in the embodiments of the present disclosure, the first node may also set two corresponding threshold values for other parameters (such as coding rate and resource quantity), and the specific implementation method may refer to the corresponding implementation method in TDCP. The embodiments of the present disclosure do not limit this.

[0136] Method 4: Determine the transmission method of the first precoding matrix based on the serial number corresponding to the first precoding matrix.

[0137] In the embodiments of the present disclosure, the first node may report full information for the precoding matrix with a specific serial number and report incremental information for the precoding matrix with other serial numbers. In this way, the first node can report full information and incremental information in a certain proportion, thereby overall controlling the signaling overhead required for transmitting the precoding matrix and the transmission loss caused by the failure to successfully parse a precoding matrix, which can improve the network transmission performance of the first node overall.

[0138] In the embodiments of the present disclosure, the above specific serial number may be a specific value indicated by the second node to the first node, or may be a specific value determined by the first node. The embodiments of the present disclosure do not limit this.

[0139] In Method 4, the serial number corresponding to the first precoding matrix may be the serial number of the time slot for transmitting the first precoding matrix (denoted as Case 3). Alternatively, the serial number corresponding to the first precoding matrix may be the number of the first precoding matrix determined after numbering the first precoding matrix based on a preset numbering rule (denoted as Case 4). Hereinafter, a detailed description will be given in combination with Case 3 and Case 4:

[0140] Case 3: The serial number corresponding to the first precoding matrix is the serial number of the time slot for transmitting the first precoding matrix.

[0141] In Case 3, the first node transmits the full information of the precoding matrix in the time sequence of the specific serial number. In the time sequence other than the above specific serial number, the incremental information of the precoding matrix is transmitted. In other words, the first node determines that the transmission method of the precoding matrix transmitted in the time sequence of the specific serial number is the first transmission method; the transmission method of the precoding matrix transmitted in the time sequence other than the above specific serial number is the second transmission method.

[0142] In the embodiments of the present disclosure, the serial number of the time slot for transmitting the first precoding matrix can be understood as the serial number of the time slot for transmitting the channel state information report carrying the first precoding matrix. The first node determines to transmit the full information of the precoding matrix in the time sequence of the specific serial number and transmit the incremental information of the precoding matrix in the time sequence of other serial numbers.

[0143] As an example, the time sequence of the specific serial number is arranged in a cycle of K. The first node determines that the serial number with a remainder of R when the serial number of the time sequence is divided by K is the specific serial number. Wherein, both the values of K and R are integers.

[0144] Case 4: The serial number corresponding to the first precoding matrix is the number of the first precoding matrix determined after numbering the first precoding matrix based on a preset numbering rule.

[0145] In some implementation manners, the starting number of the precoding matrix is F, and the first node reports full information of every P precoding matrices. In other words, the first node reports full information for the precoding matrices with serial numbers F, F + P, F + 2P, …… F + a×P, where the values of F and P are both positive integers, the value of F is less than P, and the value of a is an integer. The first node reports incremental information for other precoding matrices. At this time, the first node reports full information of the precoding matrix every P times.

[0146] In still some other implementation manners, the starting number of the precoding matrix is F. For the precoding matrix with the serial number L, if L satisfies: mod(L, P) = F, then the first node determines that the precoding matrix with the serial number L adopts the first sending manner. If L does not satisfy: mod(L, P) = F, then the first node determines that the precoding matrix with the serial number L adopts the second sending manner. Wherein, L is a positive integer. The values of F and P can refer to the descriptions in the foregoing text. At this time, the first node reports full information of the precoding matrix every P times. Correspondingly, the maximum number of precoding matrices that the second node cannot correctly parse is only P, thereby improving the effectiveness of precoding matrix transmission.

[0147] As an example, the starting number of the precoding matrix is 0. At this time, the first node determines that the precoding matrices with serial numbers: 0, 0, 0 + P, 0 + 2P, …… 0 + a×P report full information, and the remaining precoding matrices report incremental information. Or, the starting number of the precoding matrix is 0. At this time, the first node determines that the precoding matrices whose serial numbers satisfy: mod(L, P) = 0 report full information, and the precoding matrices whose serial numbers do not satisfy: mod(L, P) = 0 report incremental information.

[0148] As another example, the starting number of the precoding matrix is 1. At this time, the first node determines that the precoding matrices with serial numbers: 1, 1 + P, 1 + 2P, …… 1 + a×P report full information, and the remaining precoding matrices report incremental information. Or, the starting number of the precoding matrix is 1. At this time, the first node determines that the precoding matrices whose serial numbers satisfy: mod(L, P) = 1 report full information, and the precoding matrices whose serial numbers do not satisfy: mod(L, P) = 1 report incremental information.

[0149] Wherein, mod(L, P) represents a modulo operation, L represents the dividend, and P represents the divisor. The relevant content involving modulo operations in other embodiments of the present disclosure can be understood by reference, and the present disclosure will not elaborate thereon.

[0150] Method 5: Determine the sending method of the first precoding matrix based on the response message of the second node to the fourth precoding matrix.

[0151] In Method 5, after receiving the precoding matrix sent by the first node, the second node sends a response message of the precoding matrix to the first node. The response message of the precoding matrix is used to indicate whether the second node correctly receives the precoding matrix sent by the first node.

[0152] In some embodiments, the response message includes a correct response message and a denial response message. Among them, the correct response message is used to characterize that the second node correctly resolves the precoding matrix. The denial response message is used to characterize that the second node does not correctly resolve the precoding matrix.

[0153] If the first node receives the denial response message sent by the second node, it determines that the second node does not correctly resolve the precoding matrix. At this time, the first node needs to send the full information of the first precoding matrix to the second node to avoid the second node still being unable to correctly resolve the precoding matrix subsequently.

[0154] If the first node receives the correct response message sent by the second node, it determines that the second node has correctly resolved the precoding matrix. At this time, the first node can send the incremental information of the first precoding matrix to the second node. In addition, if the first node receives the correct response message sent by the second node, the first node can also send the full information of the first precoding matrix when other conditions are met (such as coding rate, resource quantity, TDCP value, serial number, etc.). The embodiments of the present disclosure do not limit this.

[0155] In some embodiments, the response message of the second node to the fourth precoding matrix is used to respond to the fourth precoding matrix or to respond to the channel state information report carrying the fourth precoding matrix. The fourth precoding matrix specifically includes one or more precoding matrices whose transmission time is closest to the first time point. The first time point is before the first node sends the first precoding matrix.

[0156] In other words, the response message of the second node to the fourth precoding matrix satisfies at least one of the following:

[0157] The response message closest to the first time point before, the response message of the channel state information report closest to the first time point before, the confirmation receipt response of the precoding matrix closest to the first time point before, the response message within the closest time window before the first time point, the response message of the channel state information report within the closest time window before the first time point, the response message of the precoding matrix within the closest time window before the first time point. The first time point is before the first node reports the channel state information report.

[0158] In some embodiments, the response message closest to the first time point may be: the response message before the first time point and closest to the first time point.

[0159] The response message of the channel state information report closest to the first time point may be: the response message corresponding to the channel state information report before the first time point and closest to the first time point.

[0160] The acknowledgment reception response of the precoding matrix closest to the first time point may be: the response message corresponding to the precoding matrix before the first time point and closest to the first time point.

[0161] The response message based on which the first node determines the sending manner of the first precoding matrix should be the response message closest to the time before the first time, which enables the first node to have the opportunity to determine the sending manner of the first precoding matrix based on the corresponding response message and process the information of the precoding matrix; and because it is closest to the first time, in the sending manner of incremental information, the corresponding reference precoding matrix has a relatively large correlation with the current precoding matrix, and the change amount is generally small, so that the first node reports less first node incremental information, thereby reducing the resource overhead of the first node for sending the first precoding matrix and reliably transmitting the information of the precoding matrix.

[0162] The report corresponding to the response message based on which the first node determines the sending manner of the first precoding matrix is the report closest to the time before the first time, which enables the first node to have the opportunity to use the precoding matrix carried in the closest report as the reference precoding matrix; and because it is closest to the first time, in the sending manner of incremental information, the corresponding reference precoding matrix has a relatively large correlation with the current precoding matrix, and the change amount is generally small, so that the first node reports less first node incremental information, thereby reducing the resource overhead of the first node for sending the first precoding matrix and reliably transmitting the information of the precoding matrix.

[0163] The precoding matrix corresponding to the response message based on which the first node determines the sending manner of the first precoding matrix is the precoding matrix closest to the time before the first time, which enables the first node to have the opportunity to use the closest precoding matrix as the reference precoding matrix; and because it is closest to the first time, in the sending manner of incremental information, the corresponding reference precoding matrix has a relatively large correlation with the current precoding matrix, and the change amount is generally small, so that the first node reports less first node incremental information, thereby reducing the resource overhead of the first node for sending the first precoding matrix and reliably transmitting the information of the precoding matrix.

[0164] Corresponding to the response message being a correct reception response, the first node reports incremental information and uses the precoding matrix corresponding to the response message as the reference precoding matrix; corresponding to the response message being a negative reception response, the first node reports full information.

[0165] The response message is the response message within the most recent time window before the first time; or, the response message is the reported response message within the most recent time window before the first time; or, the response message is the response message of the precoding matrix within the most recent time window before the first time; increasing the number of possible candidate reference precoding matrices or the number of possible reference precoding matrices, increasing the chance of having a correct reception response in the response message, thereby increasing the chance of reporting incremental information, thereby reducing the resource overhead occupied by reporting the precoding matrix and improving the reliability of transmitting the information of the precoding matrix.

[0166] In some embodiments, there is a time interval T between the first time point and the time when the first node sends the current channel state information report. The first node can determine the time length of T based on the configuration of the second node, or based on the capabilities of the first node reported to the second node. The embodiments of the present disclosure do not limit this.

[0167] In still other embodiments, the first time point is the time of the Jth channel state information report before sending the current channel state information report, where J is a positive integer.

[0168] In still other embodiments, the first time point is the time of the reference resource; where the reference resource is the resource assumed by the first node to report the channel state information to the second communication node, that is, the channel state reported by the first node to the second communication node is the channel state of the assumed resource.

[0169] In Mode 5, the first node needs to determine whether the second node will feedback a response message to the first node. Combining Figure 2 , as Figure 4 shown, the first node can instruct the second node to feedback a response message to the first node, specifically:

[0170] Step 401, the first node sends sixth indication information to the second node. Among them, the sixth indication information is used to instruct the second node to send a response message of the precoding matrix to the first node.

[0171] Optionally, the sixth indication information can be carried in the channel state information report sent by the first node to the second node, and the sending time of this channel state information report is before the first time point; or, the sending time of this channel state information report is before the sending time of the measurement report corresponding to the response message feedback before the first time point.

[0172] Step 402: The first node receives seventh indication information from the second node. The seventh indication information is used to indicate that when the second node receives a precoding matrix from the first node, a response message of the precoding matrix is sent to the first node.

[0173] In some embodiments, the seventh indication information is carried in DCI signaling sent by the second node to the first node. The DCI signaling is used to trigger the first node to send a precoding matrix to the second node. In addition, the DCI signaling is further used to indicate to the first node that when the second node receives a precoding matrix from the first node, a response message of the precoding matrix will be sent to the first node.

[0174] In still other embodiments, the first indication information is carried in configuration information sent by the second node to the first node.

[0175] It should be noted that the sending of the precoding matrix in the embodiments of the present disclosure can be understood as sending a channel state information report carrying the precoding matrix.

[0176] Figure 5 FIG. is a schematic flowchart of a precoding matrix transmission method applied to a second node provided by an embodiment of the present disclosure. In the embodiment of the present disclosure, the second node receives a first precoding matrix from the first node, and the first precoding matrix is sent by the first node according to a sending manner determined by the first node. Hereinafter, the functions and operations performed by each device in the communication system provided by the embodiment of the present disclosure are introduced, as Figure 5 shown, the precoding matrix transmission method includes the following steps:

[0177] Step 501: The second node receives information carrying the first precoding matrix sent by the first node.

[0178] The sending manner of the first precoding matrix includes a first sending manner and a second sending manner. The first sending manner is a sending manner for sending all information of the first precoding matrix; the second sending manner is a sending manner for sending incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is incremental information of the first precoding matrix relative to the second precoding matrix.

[0179] It should be noted that the understanding of the first precoding matrix and the process of the first node determining the sending manner of the first precoding matrix can be understood with reference to the description in the foregoing embodiments, and the present disclosure will not elaborate thereon.

[0180] Step 502: The second node obtains the first precoding matrix from the information carrying the first precoding matrix according to the sending manner of the first precoding matrix.

[0181] In some possible implementations, after the second node receives the information carrying the first precoding matrix, it determines the transmission mode of the first precoding matrix.

[0182] If the second node determines that the transmission mode of the first precoding matrix is the first transmission mode, it obtains the full information of the first precoding matrix from the information carrying the first precoding matrix, and determines the first precoding matrix based on the full information of the first precoding matrix.

[0183] If the second node determines that the transmission mode of the first precoding matrix is the second transmission mode, it obtains the incremental information of the first precoding matrix from the information carrying the first precoding matrix, and determines the second precoding matrix. The second node processes the second precoding matrix based on the incremental information to determine the first precoding matrix.

[0184] In some embodiments, in combination Figure 5 , such as Figure 6 shown, in the embodiments of the present disclosure, the second node may also receive other information from the first node. The following is a detailed description:

[0185] Step 601: The second node receives the first indication information from the first node.

[0186] Among them, the specific implementation of step 601 may refer to the above scenario 1 and step 301, and the present disclosure will not elaborate on this.

[0187] Step 602: The second node receives the second indication information from the first node.

[0188] Among them, the specific implementation of step 602 may refer to the above scenario 2 and step 302, and the present disclosure will not elaborate on this.

[0189] Step 603: The second node receives the third indication information from the first node.

[0190] Among them, the specific implementation of step 603 may refer to the above scenario 2.1 and step 303, and the present disclosure will not elaborate on this.

[0191] Step 604: The second node sends the fourth indication information to the first node.

[0192] Among them, the specific implementation of step 604 may refer to the above step 304, and the present disclosure will not elaborate on this.

[0193] Step 605: The second node receives the fifth indication information from the first node.

[0194] Among them, the specific implementation of step 605 may refer to the above scenario 2.2 and step 305, and the present disclosure will not elaborate on this.

[0195] Step 606: The second node receives the eighth indication information from the first node.

[0196] Specifically, the implementation of step 606 may refer to the above scenario 3 and step 306, which will not be elaborated in this disclosure.

[0197] In some embodiments, the first node needs to determine the sending mode of the first precoding matrix according to the response message of the precoding matrix fed back by the second node to the first node. At this time, the second node needs to indicate to the first node whether it will feed back the response message of the precoding matrix to the first node. Combining Figure 5 , as Figure 7 shown, the second node indicating to the first node whether it will feed back the response message of the precoding matrix to the first node can be specifically implemented through the following process:

[0198] Step 701: The second node receives the sixth indication information from the first node.

[0199] Specifically, the implementation manner of step 701 may refer to the above step 401, which will not be elaborated in this disclosure.

[0200] Step 702: The second node sends the seventh indication information to the first node.

[0201] Specifically, the implementation manner of step 702 may refer to the above step 402, which will not be elaborated in this disclosure.

[0202] The above various scenarios and various manners can be combined, and this disclosure embodiment does not make any limitations thereto.

[0203] It can be understood that in order for the communication device to implement the above functions, it includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in this disclosure embodiment, this disclosure embodiment can be implemented in the form of hardware or the combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraint conditions of the technical solution. Professional technicians 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 this disclosure embodiment.

[0204] Embodiments of the present disclosure may divide the communication device into functional modules according to the above method embodiments. 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 integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, only a logical function division, and there may be other division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0205] Figure 8 is a structural schematic diagram of a communication device provided by an embodiment of the present disclosure Figure 1 , and the communication device can execute the precoding matrix transmission method provided by the above method embodiment. As Figure 8 shown, the communication device includes: a processing unit 801 and a communication unit 802.

[0206] Among them, the processing unit 801 is used to determine the sending mode of the first precoding matrix; the sending mode includes a first sending mode and a second sending mode. The first sending mode is the sending mode for sending all the information of the first precoding matrix; the second sending mode is the sending mode for sending the incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to the second precoding matrix. The communication unit 802 is used to send the first precoding matrix to the second node based on the sending mode.

[0207] In a possible implementation manner, the second precoding matrix is a precoding matrix among at least one precoding matrix that has been sent to the second node.

[0208] In a possible implementation manner, the communication unit 802 is further used to send a first indication information to the second node, and the first indication information is used to indicate the second precoding matrix.

[0209] In a possible implementation manner, the first indication information includes at least one of the following: the identifier of the second precoding matrix, the measurement time of the first reference signal; the second precoding matrix is obtained by measuring the first reference signal.

[0210] In a possible implementation manner, the communication unit 802 is further used to send a second indication information to the second node, and the second indication information is used to indicate M third precoding matrices; the third precoding matrices include the precoding matrices among at least one precoding matrix that has been sent to the second node and have a replacement relationship with the second precoding matrix; M is a positive integer.

[0211] In a possible implementation, the second indication information includes at least one of the following: the identifier of the third precoding matrix, the measurement time of the second reference signal; the third precoding matrix is obtained by measuring the second reference signal.

[0212] In a possible implementation, the communication unit 802 is further configured to send third indication information to the second node, where the third indication information is used to indicate the value of M.

[0213] In a possible implementation, the communication unit 802 is further configured to receive fourth indication information from the second node, where the fourth indication information is used to indicate the value of M.

[0214] In a possible implementation, the communication unit 802 is further configured to send fifth indication information to the second node, where the fifth indication information is used to indicate the channel quality adjustment value of each third precoding matrix; wherein, the channel quality adjustment value of a third precoding matrix is determined according to the channel quality corresponding to the second precoding matrix and the channel quality corresponding to a third precoding matrix.

[0215] In a possible implementation, the transmission mode of the first precoding matrix is determined based on one or more of the following parameters: the coding rate used to transmit the first precoding matrix, the number of resources configured for transmitting the first precoding matrix, the time-domain channel property TDCP of the channel between the first node and the second node, the serial number corresponding to the first precoding matrix, the response message of the second node to the fourth precoding matrix, and the fourth precoding matrix includes one or more of at least one precoding matrix sent to the second node before the current time.

[0216] In a possible implementation, the serial number corresponding to the first precoding matrix is any one of the following: the serial number of the time slot for transmitting the first precoding matrix; the serial number of the first precoding matrix determined after numbering the first precoding matrix based on a preset numbering rule.

[0217] In a possible implementation, the response message of the second node to the fourth precoding matrix includes at least one of the following: the response message closest to the first time point before the first time point; the response message of the channel state information report closest to the first time point before the first time point; the response message of the precoding matrix closest to the first time point before the first time point; the response message within the time window closest to the first time point before the first time point; the response message of the channel state information report within the time window closest to the first time point before the first time point; the response message of the precoding matrix within the time window closest to the first time point before the first time point; the first time point is before the first node transmits the first precoding matrix.

[0218] In a possible implementation, the communication unit 802 is further configured to send sixth indication information to the second node, where the sixth indication information is used to indicate that the second node sends a response message of the precoding matrix to the first node.

[0219] In a possible implementation, the communication unit 802 is further configured to receive seventh indication information from a second node; the seventh indication information is used to indicate that when the second node receives a precoding matrix from a first node, a response message of the precoding matrix is sent to the first node.

[0220] In a possible implementation, the seventh indication information is further used to indicate the precoding matrix corresponding to the response message of the precoding matrix sent by the second node to the first node.

[0221] In a possible implementation, the communication unit 802 is further configured to send eighth indication information to the second node, and the eighth indication information is used to indicate the sending manner of a first precoding matrix.

[0222] Figure 9 This is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure Figure 2 , and the communication device can execute the precoding matrix transmission method provided by the foregoing method embodiment. As Figure 9 shown, the communication device includes: a communication unit 901.

[0223] The communication unit 901 is configured to receive information carrying a first precoding matrix sent by a first node. The sending manner of the first precoding matrix includes a first sending manner and a second sending manner. The first sending manner is a sending manner for sending all information of the first precoding matrix; the second sending manner is a sending manner for sending incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is the incremental information of the first precoding matrix relative to a second precoding matrix; according to the sending manner of the first precoding matrix, the first precoding matrix is obtained from the information carrying the first precoding matrix.

[0224] In a possible implementation, the second precoding matrix is a precoding matrix among at least one precoding matrix that has been sent to the second node.

[0225] In a possible implementation, the communication unit 901 is further configured to receive first indication information from the first node, and the first indication information is used to indicate the second precoding matrix.

[0226] In a possible implementation, the first indication information includes at least one of the following: an identifier of the second precoding matrix, a measurement time of a first reference signal; the second precoding matrix is obtained by measuring the first reference signal.

[0227] In a possible implementation, the communication unit 901 is further configured to receive second indication information from the first node, where the second indication information is used to indicate M third precoding matrices; the third precoding matrices include the precoding matrices that have a replacement relationship with the second precoding matrix among at least one precoding matrix that has been sent to the second node; M is a positive integer.

[0228] In a possible implementation, the second indication information includes at least one of the following: the identifier of the third precoding matrix, the measurement time of the second reference signal; the third precoding matrix is obtained by measuring the second reference signal.

[0229] In a possible implementation, the communication unit 901 is further configured to receive third indication information from the first node, where the third indication information is used to indicate the value of M.

[0230] In a possible implementation, the communication unit 901 is further configured to send fourth indication information to the first node, where the fourth indication information is used to indicate the value of M.

[0231] In a possible implementation, the communication unit 901 is further configured to receive fifth indication information from the first node, where the fifth indication information is used to indicate the channel quality adjustment value of each third precoding matrix; where the channel quality adjustment value of a third precoding matrix is determined according to the channel quality corresponding to the second precoding matrix and the channel quality corresponding to a third precoding matrix.

[0232] In a possible implementation, the sending mode of the first precoding matrix is determined based on one or more of the following parameters: the coding rate used to send the first precoding matrix, the number of resources configured for sending the first precoding matrix, the time-domain channel property TDCP of the channel between the first node and the second node, the serial number corresponding to the first precoding matrix, the response message of the second node to the fourth precoding matrix, and the fourth precoding matrix includes one or more of at least one precoding matrix sent to the second node before the current time.

[0233] In a possible implementation, the serial number corresponding to the first precoding matrix is any one of the following: the serial number of the time slot for sending the first precoding matrix, the serial number of the first precoding matrix determined after numbering the first precoding matrix based on a preset numbering rule.

[0234] In a possible implementation, the response message of the second node to the fourth precoding matrix includes at least one of the following: the response message closest to the first time point before the first time point; the response message of the channel state information report closest to the first time point before the first time point; the response message of the precoding matrix closest to the first time point before the first time point; the response message within the closest time window before the first time point; the response message of the channel state information report within the closest time window before the first time point; the response message of the precoding matrix within the closest time window before the first time point; the first time point is before the first node sends the first precoding matrix.

[0235] In a possible implementation, the communication unit 901 is further configured to receive sixth indication information from the first node, where the sixth indication information is used to instruct the second node to send a response message of the precoding matrix to the first node.

[0236] In a possible implementation, the communication unit 901 is further configured to send seventh indication information to the first node; the seventh indication information is used to instruct that when the second node receives the precoding matrix from the first node, the second node sends a response message of the precoding matrix to the first node.

[0237] In a possible implementation, the seventh indication information is further used to instruct the second node to send the precoding matrix corresponding to the response message of the precoding matrix to the first node.

[0238] In a possible implementation, the method further includes:

[0239] Receiving eighth indication information from the first node, where the eighth indication information is used to indicate the sending manner of the first precoding matrix.

[0240] In the case of implementing the functions of the above integrated module in the form of hardware, another possible structure of the communication device involved in the above embodiment is provided by the embodiments of the present disclosure. As Figure 10 shown, the communication device 100 includes: a processor 1002, a bus 1004. Optionally, the communication device may further include a memory 1001; optionally, the communication device may further include a communication interface 1003.

[0241] The processor 1002 can be a device that implements or executes various exemplary logical blocks, modules, and circuits described in connection with the embodiments of the present disclosure. The processor 1002 can 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, transistor logic device, hardware component, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the embodiments of the present disclosure. The processor 1002 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0242] The communication interface 1003 is used to connect to other devices through a communication network. The communication network can be an Ethernet, a radio access network, a wireless local area network (WLAN), etc.

[0243] The memory 1001 can 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. It can also be an electrically erasable programmable read-only memory (EEPROM), a magnetic 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.

[0244] As a possible implementation, the memory 1001 can exist independently of the processor 1002. The memory 1001 can be connected to the processor 1002 through a bus 1004 for storing instructions or program code. When the processor 1002 calls and executes the instructions or program code stored in the memory 1001, the precoding matrix transmission method provided by the embodiments of the present disclosure can be implemented.

[0245] In another possible implementation, the memory 1001 can also be integrated with the processor 1002.

[0246] The bus 1004 can be an extended industry standard architecture (EISA) bus, etc. The bus 1004 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 only a thick line is shown in the figure, but it does not mean that there is only one bus or one type of bus.

[0247] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions, which, when running on a computer, cause the computer to execute the precoding matrix transmission method described in any one of the above embodiments.

[0248] Exemplarily, the above computer-readable storage medium may include, but is not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., Compact Disks (CDs), Digital Versatile Disks (DVDs), etc.), smart cards, and flash memory devices (e.g., Erasable Programmable Read-Only Memories (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the embodiments of the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0249] The embodiments of the present disclosure provide a computer program product containing instructions, which, when running on a computer, cause the computer to execute the precoding matrix transmission method described in any one of the above embodiments.

[0250] As described above, the above are only the specific implementation manners of the embodiments of the present disclosure, but the protection scope of the embodiments of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present disclosure should be covered by the protection scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A precoding matrix transmission method, characterized in that: Applied to the first node, the method comprises: Determine a sending mode of a first precoding matrix; the sending mode includes a first sending mode and a second sending mode, the first sending mode is a sending mode for sending full information of the first precoding matrix; the second sending mode is a sending mode for sending incremental information of the first precoding matrix, and the incremental information of the first precoding matrix is ​​incremental information of the first precoding matrix relative to the second precoding matrix; Based on the sending mode, the first precoding matrix is ​​sent to the second node.

2. The method according to claim 1, characterized in that The second precoding matrix is ​​a precoding matrix in at least one precoding matrix that has been sent to the second node.

3. The method according to claim 1, characterized in that In a case where the sending mode of the first precoding matrix is ​​the second sending mode, the method further includes: Sending first indication information to the second node, where the first indication information is used to indicate the second precoding matrix.

4. The method according to claim 3, characterized in that The first indication information includes at least one of the following: an identifier of the second precoding matrix; The measurement time of the first reference signal; the second precoding matrix is ​​obtained by measuring the first reference signal.

5. The method according to claim 1, characterized in that In a case where the sending mode of the first precoding matrix is ​​the second sending mode, the method further includes: Sending second indication information to the second node, where the second indication information is used to indicate M third precoding matrices; the third precoding matrix includes a precoding matrix that has a replacement relationship with the second precoding matrix among at least one precoding matrix that has been sent to the second node; and M is a positive integer.

6. The method according to claim 5, characterized in that The second indication information includes at least one of the following: an identifier of the third precoding matrix; The measurement time of the second reference signal; the third precoding matrix is ​​obtained by measuring the second reference signal.

7. The method according to claim 5, characterized in that The method further comprises: Send third indication information to the second node, where the third indication information is used to indicate a value of the M.

8. The method according to claim 5, characterized in that Before sending the second indication information to the second node, the method further includes: Receive fourth indication information from the second node, where the fourth indication information is used to indicate a value of the M.

9. The method according to claim 5, characterized in that The method further comprises: Send fifth indication information to the second node, wherein the fifth indication information is used to indicate the channel quality adjustment value of each of the third precoding moments; wherein the channel quality adjustment value of a third precoding moment is determined based on the channel quality corresponding to the second precoding matrix and the channel quality corresponding to the third precoding moment.

10. The method according to claim 1, characterized in that The sending manner of the first precoding matrix is ​​determined based on one or more of the following parameters: Sending a coding rate used by the first precoding matrix; The number of resources configured for sending the first precoding matrix; A time domain channel property TDCP of a channel between the first node and the second node; A sequence number corresponding to the first precoding matrix; A response message of the second node to a fourth precoding matrix, where the fourth precoding matrix includes one or more of at least one precoding matrix sent to the second node before a current time.

11. The method according to claim 10, characterized in that The sequence number corresponding to the first precoding matrix is ​​any one of the following: Sending the sequence number of the time slot of the first precoding matrix; The number of the first precoding matrix is ​​determined after the first precoding matrix is ​​numbered based on a preset numbering rule.

12. The method according to claim 11, characterized in that The response message of the second node to the fourth precoding matrix includes at least one of the following: the most recent response message before the first time point; A response message of the most recent channel state information report before the first time point; A response message of the most recent precoding matrix before the first time point; a response message within a time window closest to the first time point; a response message to a channel state information report within a time window closest to the first time point; A response message of a precoding matrix within a time window closest to the first time point; The first time point is before the first node sends the first precoding matrix.

13. The method according to claim 10, characterized in that In a case where the sending manner of the first precoding matrix is ​​based on a response message of the second node to a fourth precoding matrix, the method further includes: Send sixth indication information to the second node, where the sixth indication information is used to instruct the second node to send a response message of the precoding matrix to the first node.

14. The method according to claim 10, characterized in that In a case where the sending manner of the first precoding matrix is ​​based on a response message of the second node to a fourth precoding matrix, the method further includes: Receive seventh indication information from the second node; the seventh indication information is used to indicate that when the second node receives the precoding matrix from the first node, a response message of the precoding matrix is ​​sent to the first node.

15. The method according to claim 14, characterized in that The seventh indication information is further used to instruct the second node to send a precoding matrix corresponding to a response message of the precoding matrix to the first node.

16. The method according to claim 1, characterized in that The method further comprises: Sending eighth indication information to the second node, where the eighth indication information is used to indicate a sending method of the first precoding matrix.

17. A precoding matrix transmission method, characterized in that: Applied to the second node, the method comprises: receiving information carrying a first precoding matrix sent by a first node, where a sending mode of the first precoding matrix includes a first sending mode and a second sending mode, where the first sending mode is a sending mode for sending full information of the first precoding matrix; and the second sending mode is a sending mode for sending incremental information of the first precoding matrix, where the incremental information of the first precoding matrix is ​​incremental information of the first precoding matrix relative to a second precoding matrix; According to the sending mode of the first precoding matrix, the first precoding matrix is ​​acquired from the information carrying the first precoding matrix.

18. The method according to claim 17, characterized in that The second precoding matrix is ​​a precoding matrix in at least one precoding matrix that has been sent to the second node.

19. The method according to claim 17, characterized in that The method further comprises: First indication information is received from the first node, where the first indication information is used to indicate the second precoding matrix.

20. The method according to claim 19, characterized in that The first indication information includes at least one of the following: an identifier of the second precoding matrix; The measurement time of the first reference signal; the second precoding matrix is ​​obtained by measuring the first reference signal.

21. The method according to claim 17, characterized in that The method further comprises: Receive second indication information from the first node, where the second indication information is used to indicate M third precoding matrices; the third precoding matrix includes a precoding matrix that has a replacement relationship with the second precoding matrix among at least one precoding matrix sent to the second node; and M is a positive integer.

22. The method according to claim 21, characterized in that The second indication information includes at least one of the following: an identifier of the third precoding matrix; The measurement time of the second reference signal; the third precoding matrix is ​​obtained by measuring the second reference signal.

23. The method according to claim 21, characterized in that The method further comprises: Receive third indication information from the first node, where the third indication information is used to indicate a value of the M.

24. The method according to claim 21, characterized in that Before receiving the second indication information from the first node, the method further includes: Send fourth indication information to the first node, where the fourth indication information is used to indicate a value of the M.

25. The method according to claim 21, characterized in that The method further comprises: Receive fifth indication information from the first node, wherein the fifth indication information is used to indicate a channel quality adjustment value of each of the third precoding matrices; wherein the channel quality adjustment value of a third precoding matrix is ​​determined based on a channel quality corresponding to the second precoding matrix and a channel quality corresponding to the third precoding matrix.

26. The method according to claim 17, characterized in that The sending manner of the first precoding matrix is ​​determined based on one or more of the following parameters: Sending a coding rate used by the first precoding matrix; The number of resources configured for sending the first precoding matrix; A time domain channel property TDCP of a channel between the first node and the second node; A sequence number corresponding to the first precoding matrix; A response message of the second node to a fourth precoding matrix, where the fourth precoding matrix includes one or more of at least one precoding matrix sent to the second node before a current time.

27. The method according to claim 26, characterized in that The sequence number corresponding to the first precoding matrix is ​​any one of the following: Sending the sequence number of the time slot of the first precoding matrix; The number of the first precoding matrix is ​​determined after the first precoding matrix is ​​numbered based on a preset numbering rule.

28. The method according to claim 27, characterized in that The response message of the second node to the fourth precoding matrix includes at least one of the following: the most recent response message before the first time point; A response message of the most recent channel state information report before the first time point; A response message of the most recent precoding matrix before the first time point; a response message within a time window closest to the first time point; a response message to a channel state information report within a time window closest to the first time point; A response message of a precoding matrix within a time window closest to the first time point; The first time point is before the first node sends the first precoding matrix.

29. The method according to claim 26, characterized in that In a case where the sending manner of the first precoding matrix is ​​based on a response message of the second node to a fourth precoding matrix, the method further includes: Receive sixth indication information from the first node, where the sixth indication information is used to instruct the second node to send a response message of a precoding matrix to the first node.

30. The method according to claim 26, characterized in that In a case where the sending manner of the first precoding matrix is ​​based on a response message of the second node to a fourth precoding matrix, the method further includes: Sending seventh indication information to the first node; the seventh indication information is used to indicate that when the second node receives the precoding matrix from the first node, a response message of the precoding matrix is ​​sent to the first node.

31. The method according to claim 30, characterized in that The seventh indication information is further used to instruct the second node to send a precoding matrix corresponding to a response message of the precoding matrix to the first node.

32. The method according to claim 17, characterized in that The method further comprises: Receive eighth indication information from the first node, where the eighth indication information is used to indicate a sending method of the first precoding matrix.

33. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 32 is performed.

34. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 32.

35. A computer program product, characterized in that The computer program product comprises computer program instructions, which implement the method according to any one of claims 1 to 32 when executed by a processor.

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