Information transmission method and apparatus, storage medium, and program product

Abstract

Embodiments of the present disclosure provide an information transmission method and device, a storage medium and a program product, relating to the technical field of communication, and can improve the communication performance. The method comprises: performing measurement based on a plurality of reference signal measurement resources to obtain measurement results; and sending a measurement report to a second node, the measurement report comprising first type measurement results of K1 reference signal measurement resources in the plurality of reference signal measurement resources; the first type measurement results comprising interference information; and K1 being a positive integer.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to information transmission methods, devices, storage media and program products. Background Technology

[0002] Distributed multi-input multi-output (DMIMO) systems offer a more uniform and stable quality of service compared to centralized multi-input multi-output (MIMO) systems, featuring multiple distributed transmission and reception points (TRPs). However, when these TRPs communicate with the terminal, some TRPs may interfere with the terminal's transmission, thus affecting the terminal's communication performance. Summary of the Invention

[0003] This disclosure provides an information transmission method, apparatus, storage medium, and program product that can improve communication performance.

[0004] On the one hand, an information transmission method is provided, including: performing measurements based on multiple reference signal measurement resources to obtain measurement results;

[0005] A measurement report is sent to the second node. The measurement report includes the first type of measurement results of K1 reference signal measurement resources out of the plurality of reference signal measurement resources. The first type of measurement results includes interference information. K1 is a positive integer.

[0006] In another aspect, an information transmission method is provided, comprising: receiving a measurement report sent by a first node, the measurement report including first-type measurement results of K1 reference signal measurement resources out of a plurality of reference signal measurement resources; the first-type measurement results including interference information; K1 being a positive integer;

[0007] The interference is suppressed on the first node based on the interference information.

[0008] In another aspect, an information transmission device is provided, comprising: a measurement unit and a transmission unit; the measurement unit is used to perform measurements based on multiple reference signal measurement resources to obtain measurement results;

[0009] The transmitting unit is used to send a measurement report to the second node. The measurement report includes a first type of measurement results for K1 reference signal measurement resources out of the plurality of reference signal measurement resources. The first type of measurement results includes interference information. K1 is a positive integer.

[0010] In another aspect, an information transmission device is provided, comprising: a receiving unit and a processing unit; the receiving unit is configured to receive a measurement report sent by a first node, the measurement report including first-type measurement results of K1 reference signal measurement resources out of a plurality of reference signal measurement resources; the first-type measurement results include interference information; K1 is a positive integer;

[0011] The processing unit is used to suppress interference on the first node based on the interference information.

[0012] In another aspect, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and the processor, when executing the computer program, implements the information transmission method of any of the above embodiments.

[0013] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the information transmission method of any of the above embodiments.

[0014] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed by a processor, implement the information transmission method of any of the above embodiments.

[0015] This disclosure discloses an embodiment in which a first node can send a measurement report based on the measurement results of multiple reference signal measurement resources. This measurement report includes measured interference information. In this way, a second node can perform interference suppression processing based on the interference information fed back by the first node, thereby reducing the interference caused by the TRP (Transmission Reference Resource) in the second node to the first node and improving communication performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of a plurality of TRPs provided for some embodiments of this disclosure;

[0018] Figure 2 This disclosure provides an architecture diagram of a TRP and a terminal for some embodiments;

[0019] Figure 3 A communication system architecture diagram provided for some embodiments of this disclosure;

[0020] Figure 4A flowchart illustrating an information transmission method provided in some embodiments of this disclosure;

[0021] Figure 5 This is a schematic flowchart illustrating the configuration of reference signal measurement resources according to some embodiments of this disclosure;

[0022] Figure 6 A flowchart illustrating another information transmission method provided in some embodiments of this disclosure;

[0023] Figure 7 This is a schematic diagram of the structure of a communication device provided in some embodiments of this disclosure;

[0024] Figure 8 This is a schematic diagram of the structure of another communication device provided in some embodiments of this disclosure;

[0025] Figure 9 This is a schematic diagram of the structure of another communication device provided in some embodiments of this disclosure. Detailed Implementation

[0026] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0027] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0028] It should be noted that, in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0029] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0030] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0031] In this disclosure, suffixes such as "module," "part," or "unit" used to represent elements are used only for the purpose of illustrative purposes and have no inherent meaning. Therefore, "module," "part," or "unit" can be used interchangeably.

[0032] In wireless communication systems, the transmitting and receiving ends typically configure multiple antennas to form a MIMO system, thereby utilizing spatial division multiplexing technology to improve transmission rates. Depending on whether the base station's multiple antennas are deployed in the same area, MIMO transmission is divided into centralized MIMO and distributed MIMO. Distributed MIMO utilizes multiple TRPs deployed in different geographical locations to serve user equipment (UE), thereby shortening the distance between the UE and the TRPs and providing a more uniform and stable quality of service. Simultaneously, the coordinated transmission among TRPs can better suppress interference and improve spectrum efficiency. Multiple TRPs serve the UE in a cooperative manner; considering the impact of path loss, only a portion of the cooperative TRPs need to be selected to transmit useful signals, while the other cooperative TRPs will interfere with the UE and are used for interference suppression (also known as interfering TRPs).

[0033] For example, such as Figure 1As shown, TRP1-7 are used to serve the UE. Among them, TRP1 / 2 / 3 / 6 / 7 cooperate to serve UE A. For example, TRP1 / 2 / 3 sends useful signals to UE A, while TRP6 / 7 does not need to transmit useful signals to UE A. Instead, it transmits useful signals to UE B, causing interference to UE A. When TRP6 / 7 transmits useful signals to UE B, the selection of the precoding matrix needs to consider the interference suppression to UE A, thereby reducing the interference of TRP6 / 7 to UE A.

[0034] In related technologies, the transmission of multiple TRPs can be achieved through coherent joint transmission (CJT). Furthermore, to ensure performance gain, the base station's TRPs need to acquire channel state information (CSI) to calculate precoding vectors (i.e., precoding matrices) to enhance signal quality and suppress interference. The UE typically obtains CSI by receiving feedback from other UEs; the accuracy of this feedback has a significant impact on system performance.

[0035] During multi-TRP CJT transmission, the base station needs to determine the number of data layers, modulation scheme, and precoding vector based on channel state information. In 5G New Radio (NR), the base station obtains channel state information primarily based on feedback from the UE.

[0036] For example, such as Figure 2 As shown, in a distributed network transmission system, there are K TRPs (transmitting nodes, TX) serving UEs (receiving nodes, RX) in CJT mode, namely TX1, TX2...TXK. Assume the k-th TRP has N... k There are [number] antenna ports, and all transmitting nodes have a total of [number] antenna ports. With M antenna ports, and the UE having M antenna ports, the downlink channel matrix of the entire distributed system can be represented as follows: in This represents the downlink channel matrix formed by the k-th TRP and the UE.

[0037] To obtain channel state information, each TRP transmits a downlink reference signal, and the UE measures the downlink reference signal of each TRP to obtain the channel state information H. kBy concatenating the channel state information corresponding to each TRP, the global channel state information H can be obtained. Based on the global channel state information, the UE selects K0 TRPs from K TRPs to transmit data and provides feedback for the corresponding K0 CSI-RS resources. Specifically, the base station and the UE share a codebook {c1,c2,…,c…} B The UE determines the data transmission layer number, or rank, according to specific criteria and selects specific codewords from the codebook as recommended precoding vectors, feeding this information back to the base station via a precoding matrix indicator (PMI). Simultaneously, the UE aggregates interference measurement information and, assuming the base station uses the codewords indicated by the fed-back PMI as precoding vectors, calculates the signal-to-interference-noise ratio (SINR), further converting it into a channel quality indicator (CQI) and feeding it back to the base station.

[0038] In related technologies, the UE can estimate the received interference based on reference signals, for example, using non-zero power channel state information reference signals (NZP CSI RS for interference measurement) or channel state information for interference measurement (CSI-IM). The UE can then perform interference suppression based on the estimated interference, such as minimum mean square error (MMSE) detection. However, since the downlink reference signal received by the UE is only the downlink reference signal transmitted by the TRP serving the UE, and the interfering TRP does not transmit downlink reference signals to the UE, the UE can only determine the interference factor using the channel state information corresponding to the TRP serving the current UE. Therefore, the above method can only reduce the impact of interference to a certain extent and cannot change the interference itself caused to the UE by other TRPs that do not transmit data to the UE (i.e., interfering TRPs, such as TRP6 / 7 mentioned above).

[0039] To address this, this disclosure provides an information transmission method in which a first node can send a measurement report based on the measurement results of multiple reference signal measurement resources. This measurement report includes measured interference information. In this way, a second node can perform interference suppression processing based on the interference information fed back by the first node, thereby reducing the interference caused by the TRP (Transmission Reference Resource) in the second node to the first node and improving communication performance.

[0040] The information transmission method provided in this disclosure can be applied to systems with various communication standards. For example, the information transmission method provided in this disclosure can be applied to systems including, but not limited to, Long Term Evolution (LTE) systems, various versions based on LTE evolution, 5G systems, future mobile communication networks (such as 6G mobile communication networks), or multiple converged communication systems. Furthermore, the information transmission method provided in this disclosure can also be applied to future-oriented communication systems.

[0041] For example, the above information transmission method can be applied to, for example, Figure 3 In the aforementioned communication system, such as Figure 3 As shown, the communication system includes: a first node 301 and a second node 302.

[0042] The first node 301 and the second node 302 are communicatively connected. The first node 301 can be referred to as a UE, terminal-side device, user-side device, etc. The second node 302 can be referred to as a TRP, base station-side device, network-side device, etc. It should be noted that the second node 301 can communicate with the first node 301 through multiple distributed TRPs.

[0043] In some embodiments, the first node 301 performs measurements based on multiple reference signal measurement resources to obtain measurement results. Then, the first node 301 sends a measurement report to the second node 302. The measurement report includes first-type measurement results for K1 reference signal measurement resources out of the multiple reference signal measurement resources. The first-type measurement results include interference information; K1 is a positive integer. Thus, the second node 302 can perform interference suppression processing based on the received interference information, thereby reducing the interference of interference TRPs in the second node 302 on the first node 301 and improving communication performance.

[0044] It should be noted that, Figure 3 This is just an example framework diagram. Figure 3 The number of communication devices included, and the names of each communication device, are unlimited, except for... Figure 3 In addition to the communication equipment shown, the communication system may also include other communication equipment, such as relay nodes.

[0045] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0046] The information transmission method provided by the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0047] The information transmission method provided in this disclosure can be applied to... Figure 3 The first node 301 in the communication system shown. Figure 4 A flowchart illustrating an information transmission method is shown, such as... Figure 4 As shown, the information transmission method includes the following S401 and S402.

[0048] S401. Measurements are performed based on multiple reference signal measurement resources to obtain measurement results.

[0049] The reference signal measurement resources may include CSI-RS resources. Multiple reference signal resources are configured for the second node to be used by the first node for measurement.

[0050] In one possible implementation, the first node can measure each of the multiple reference signal measurement resources to obtain a measurement result for each reference signal measurement resource, or it can measure only a portion of the multiple reference signal measurement resources to obtain a measurement result for each measured reference signal measurement resource. This measurement result can be a measured channel measurement matrix, such as an interference channel matrix.

[0051] S402, Send a measurement report to the second node.

[0052] The measurement report includes the first type of measurement results for K1 reference signal measurement resources out of multiple reference signal measurement resources; the first type of measurement results includes interference information; K1 is a positive integer. These K1 reference signal measurement resources are used to measure interference information.

[0053] When the first node measures multiple reference signal measurement resources, it can measure the interference information of K1 reference signal measurement resources, thus obtaining the measurement results of K1 reference signal measurement resources as the first type of measurement result, i.e., interference information. In this way, the first node can feed back the interference information obtained from these K1 reference signal measurement resources to the second node through a measurement report, allowing the second node to perform interference suppression based on the interference information. Since the interference received by the first node includes the interference from the aforementioned interfering TRPs, the second node, when performing interference suppression based on the interference information, can reduce the impact of the interfering TRPs in the second node's multiple TRPs on the first node, thereby improving communication performance.

[0054] In one possible interference suppression method, after receiving interference information, the second node can calculate the null space of the interference channel matrix, since the interference information can be an interference channel matrix. Projecting the precoding vector (i.e., the precoding vector determined based on CSI) onto this null vector achieves interference suppression. For example, without interference suppression, suppose the precoding vector of the second node for other first nodes is W, and the null space corresponding to the current first node's channel is U; if interference suppression is considered, the precoding vector after interference suppression (i.e., after correction) is W% = UU. H W. In this way, the interference experienced by the current first node is reduced, thereby improving system performance.

[0055] In some embodiments, the measurement report also includes a second type of measurement results from K0 reference signal measurement resources out of a plurality of reference signal measurement resources. These second type of measurement results include channel state information; K0 is a positive integer. Since the primary function of the reference signal measurement resources is to allow the first node to feed back channel state information, in addition to measuring K1 reference signal measurement resources to obtain interference information, the first node can also perform measurements based on K0 reference signal measurement resources out of the plurality of reference signal measurement resources to obtain channel state information. Thus, the measurement report fed back by the first node can also include channel state information, enabling the first node to perform interference suppression based on both channel state information and interference information, thereby improving communication performance.

[0056] Among these, the K0 reference signal measurement resources are used to measure channel state information (PMI). The channel state information may include the Precoding Vector (PMI). After receiving the PMI, the second node can determine the precoding vector.

[0057] In one possible implementation, the K0 and K1 reference signal measurement resources may or may not have overlapping reference signal measurement resources. Furthermore, K0 + K1 may be equal to or less than the number of reference signal measurement resources, meaning that the measurement results of some reference signal measurement resources may not be reported.

[0058] For example, taking K CSI RS resources as multiple reference signal measurement resources, the first node performs measurements based on K0 of the CSI RS resources to obtain PMI, and then feeds back PMI; and performs measurements based on K1 of the CSI RS resources to obtain interference information, and then feeds back interference information.

[0059] After obtaining channel state information and interference information, the first node needs to feed these back to the second node. Furthermore, the first node also needs to report which reference signal measurement resource each measurement result was based on. This is because one reference signal resource corresponds to a channel between the second node and a TRP (Transmission Point Resource) on which the first node operates. Therefore, the second node can determine which TRPs experience the most severe interference based on the correspondence between interference information and reference signal measurement resources, and thus take action to reduce the interference experienced by the first node. The following is the indication method by which the first node demonstrates the correspondence between measurement results and reference signal measurements.

[0060] In some embodiments, the measurement report is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources; K = K0 + K1. The type of measurement result is either interference information or channel state information. That is, the first node can configure the purpose of the K reference signal measurement resources in the measurement report, i.e., for measuring channel state information or for measuring interference information. The following are several ways to indicate the type of measurement result.

[0061] Method 1: The measurement report also includes bitmap information, which is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources.

[0062] For example, the measurement report includes a bit sequence of length K (i.e., the bitmap information mentioned above). This bit sequence indicates the measurement result type corresponding to the identifier of each reference signal measurement resource in a bitmap manner. For example, if the first bit in the bit sequence is 0, it means that the measurement result type of the first reference signal measurement resource is interference information, and if it is 1, it means that the corresponding measurement result type is channel state information.

[0063] Method 2: The measurement report also includes the identifier of each reference signal measurement resource, and the type of measurement result associated with the identifier of each reference signal measurement resource.

[0064] Method 3: When K is the number of multiple reference signal measurement resources, and K1 reference signal measurement resources and K0 reference signal measurement resources are not duplicated, the measurement report is specifically used to indicate the identifier of the reference signal measurement resource corresponding to the first type of measurement result or the second type of measurement result.

[0065] The first and second nodes can agree that K0 + K1 = K. That is, both the first and second nodes know the value of K. Therefore, the first node only needs to feed back the reference signal measurement resources corresponding to the interference information. The type of the measurement results corresponding to the remaining reference signal measurement resources can be determined as channel state information, thus saving field resources. Correspondingly, the first node can also only feed back the reference signal measurement resources corresponding to the channel state information.

[0066] For example, the second node configures 5 CSI RS resources for the first node, labeled 1-5, corresponding to... Figure 1 The antenna ports of TRP 1 / 2 / 3 / 6 / 7 are used. After measuring these five CSI RS resources, the first node can indicate CSI RS resources 1-3 by feeding back the bit sequence "11100", indicating that the corresponding measurement result type is channel state information. The bit sequence "00011" is used to indicate CSI RS resources 4-5, indicating that the corresponding measurement result type is interference information. In this way, the second node can use TRP 1 / 2 / 3 to transmit data, while TRP 6 / 7, when serving other first nodes, can consider interference suppression for the current first node based on the interference information.

[0067] In one possible implementation, channel state information may include CQI, rank indicator (RI), etc., in addition to PMI.

[0068] The above describes various ways to indicate the type of measurement results. The following section will describe the reporting scheme for interference information.

[0069] Option 1: The interference information includes K1×Nr interference channel matrices obtained by measuring K1 reference signal measurement resources.

[0070] One of the interference channel matrices is an N k The frequency domain channel matrix H is ×M. k,r N r N represents the number of antenna ports in the first node used to receive the reference signal. kM represents the number of antenna ports used to report reference signals in the first node, and M represents the number of frequency domain units.

[0071] The first node can provide feedback on interference information through explicit feedback of the interference channel matrix. The first node can measure K1 reference signal measurement resources for measuring interference information, obtaining K1×Nr interference channel matrices. Each interference channel matrix corresponds to a channel between a TRP and one antenna port of the first node. Then, the first node can quantize and feed back the interference channel matrix based on a pre-agreed codebook; that is, the measurement report includes the quantized channel matrix.

[0072] For each interference channel matrix, an interference channel matrix is ​​an N k The frequency domain channel matrix H is ×M. k,r That is, each frequency domain channel matrix corresponds to the channel state of each frequency domain unit in the channel corresponding to that antenna port, thus characterizing the difference in the channel matrix of different frequency domain units.

[0073] In one possible implementation, the frequency domain channel matrix H k,r It is represented as follows: multiple spatial basis vectors and multiple frequency basis vectors selected from a preset set of basis vectors, as well as the linear combination coefficients of the multiple spatial basis vectors and multiple frequency basis vectors.

[0074] The methods for quantizing and feeding back the interference channel matrix include:

[0075] A,

[0076] Where h k,r,m For a length of N k The column vector, α k,r This is used to characterize the magnitude of the interference channel matrix. In some cases, the second node may not need to know the magnitude of the interference channel matrix, thus eliminating the need for α feedback. k,r {w i} and {z i} are spatial and frequency domain basis vectors, respectively, selected from a pre-agreed set of basis vectors (i.e., the aforementioned pre-defined set of basis vectors) agreed upon by the first and second nodes. Subsequently, the first node can indicate the selected basis vectors through a measurement report. Y represents the linear combination coefficients of the spatial and frequency domain basis vectors, with their amplitude and phase quantized and fed back.

[0077] B. Regarding H k,r The phase / amplitude of each element in H is quantized and fed back separately. That is, unlike A, the quantization feedback is of H. k,r The phase / amplitude of each element in the equation, not H. k,r Convert to The phase and amplitude of the subsequent elements.

[0078] Option 2: The interference information includes a value space determined based on the interference channel matrix.

[0079] The first node can measure K1 reference signal measurement resources for measuring interference information, obtain the interference channel matrix, calculate the value space of the interference channel matrix, and provide feedback. For example, it can perform singular value decomposition (SVD) on the interference channel matrix, taking the first right starting vector... The column is subjected to quantization feedback, and the quantization feedback method is the same as in Scheme 1. The only difference compared to Scheme 1 is that the measured interference channel matrix is... Interference channel matrix,

[0080] Option 3: The interference information includes indication information of K1×G vectors; the vectors are used to characterize the projection direction of the interference channel matrix obtained by measuring K1 reference signal measurement resources; the projection direction satisfies a preset size condition; G is the number of vectors in each of the K1 groups of vectors selected according to the projection direction.

[0081] Among them, the preset size condition can be that the projection energy in the projection direction is the largest (or the second largest, the third largest, etc.).

[0082] The first node can measure K1 reference signal measurement resources for measuring interference information to obtain the interference channel matrix. It then projects the interference channel matrix onto multiple basis vectors (or vectors) in a preset set of basis vectors (or preset vector sets). Based on the projection energy, K1 sets of orthogonal bases are selected, along with G basis vectors in each set, resulting in a total of K1×G basis vectors. The measurement report can include indication information for each set of orthogonal bases and the indication information for the G basis vectors under each set of orthogonal bases, thus characterizing the interference channel matrix, i.e., the interference information.

[0083] For example, suppose the pre-defined orthogonal basis set agreed upon by the first node and the second node is a two-dimensional discrete Fourier transform (2D-DFT) orthogonal basis, with the two dimensions being of size N. 1,k N 2,k Considering that TRPs are generally configured with dual-polarized antennas,

[0084] N k =2N 1,k N 2,k Assuming the oversampling factors for the two dimensions are O1 and O2, there are a total of O1O2 orthogonal basis vectors, and the 2D-DFT basis vectors vl,m It can be represented as:

[0085]

[0086] Wherein, the 2D-DFT basis vector v l,m This can be determined by parameters m and l. For the k-th reference signal measurement resource used to measure interference information, the indication information of the G basis vectors fed back is...

[0087] {m 1,k ,m 2,k ,…,m G,k ,l 1,k ,l 2,k ,…,l G,k}, where m g,k ∈{0,1,…,O2N 2,k -1},l g,k ∈{0,1,…,O1N 1,k -1}. That is, for each reference signal measurement resource, G basis vectors must be fed back.

[0088] The above describes the feedback methods for interference information. In addition to interference information and channel state information, the measurement report may also include the channel gains obtained from interference suppression based on the interference information, i.e., channel state change information. The following is a description of the channel state change information.

[0089] In some embodiments, the measurement report further includes channel state change information; the channel state change information is determined by the first node and obtained by the second node after interference suppression based on the interference information.

[0090] After receiving interference information, the second node can perform interference suppression based on this information. This results in a better channel state after interference suppression, representing a gain or improvement in channel state change information. Meanwhile, after receiving interference information, the first node can also predict the channel state changes after interference suppression by the second node and report these changes via measurement reports. This allows the second node to determine whether to perform interference suppression and which first nodes' interference to suppress, further improving system performance. For example, for first nodes with minimal channel state changes, the second node can choose not to perform interference suppression.

[0091] The channel state change information is determined based on interference information and precoding information. The precoding information is either preset or estimated by the first node. Since the first node only obtains the interference channel matrix representing the interference information and does not know the precoding method used by the interfering TRP, the first and second nodes can pre-agree (or estimate) on the precoding method of the interfering TRP, thereby determining the channel state change information based on the precoding method. The precoding information includes the precoding matrix or the type of the precoding matrix.

[0092] Furthermore, this precoding method is only used for interference estimation and determining channel state change information. After the second node receives the measurement report from the first node, it can either change the precoding method for service transmission or continue using the agreed-upon precoding method.

[0093] In one possible implementation, the type of the precoding matrix agreed upon by the first and second nodes can be a random matrix W with a size of N. t ×RI. Where N t This represents the sum of the number of ports included in the CSI-RS resources used to measure interference information, where RI is the number of transmission data layers fed back by the first node. The elements of this matrix, with m rows and n columns, can be represented as follows: Where β is the normalization factor, φ m,n For random variables that follow a specific distribution, such as φ m,n It follows a uniform distribution in (0, 2π).

[0094] In another possible implementation, the channel state change information includes interference power change information and / or channel quality change information. For example, the channel state change information may include the amount of reduction in interference power and / or the amount of increase in channel quality indication (CQI).

[0095] The channel state change information refers to either the changed channel state information or the difference between the changed information and the channel state information included in the measurement report. In other words, the measurement report can include both the measured channel state information and the determined channel state change information. This channel state change information can be the changed channel state information (followed by existing CQI quantization feedback methods) or the difference between the changed information and the original channel state information (i.e., the channel state information in the measurement report) (i.e., a differential method), for example, the difference relative to the reported CQI, which is an integer. For example, if the first node reports an original CQI index of 10, and the CQI index becomes 12 after considering interference suppression, then only the CQI index needs to be increased by 2 in the feedback as a benefit of considering interference suppression.

[0096] Regarding interference power variation information, the first node can feed back the interference power corresponding to the CSI RS resources used to measure interference information, which is also the estimated interference power after interference suppression. For example, if the interference channel matrix corresponding to the CSI RS resources used to measure interference information is H, and the precoding matrix agreed upon by the first and second nodes for estimating interference is W, then the estimated interference power is trace(HWW). H H H This value is also the reduced interference power resulting from the second node's interference suppression based on interference information.

[0097] To improve CQI, the first node calculates the SINR of each frequency domain cell based on the PMI seat precoding vector recommended by the second node and the interference information measured by the first node itself, and further converts it into CQI. When interference suppression is considered by the second node, the interference situation will change. The first node can calculate a new SINR and convert the new SINR into a new CQI in the traditional CQI manner.

[0098] The above is a description of the measurement report. The following will describe how the second node configures the reference signal measurement resources.

[0099] In some embodiments, combined with Figure 4 ,like Figure 5 As shown, prior to S401 above, the method provided in this disclosure embodiment further includes:

[0100] S501, Receive the first configuration information.

[0101] The first configuration information is used to configure multiple reference signal measurement resources and to indicate the type of measurement result corresponding to at least one of the multiple reference signal measurement resources.

[0102] The type of measurement result corresponding to each reference signal measurement resource can be determined by the first node itself. That is, the first node selects a reference signal measurement resource for measuring interference information or a reference signal measurement resource for measuring channel state information from multiple reference signal measurement resources.

[0103] Alternatively, the first node can receive the first configuration information from the second node. This configuration information, in addition to configuring multiple reference signal measurement resources, can also indicate the type of measurement result corresponding to each reference signal measurement resource. This way, the first node does not need to determine whether each reference signal measurement resource is used to measure interference information or channel state information.

[0104] It should be noted that since the type of measurement result corresponding to each reference signal measurement resource is determined by the second node, the second node can make this determination based on historical channel measurement results. However, when the first node makes its own selection, it can select based on the measurement results of multiple reference signal measurement resources, for example, choosing to report multiple interference information items with a significant impact from the interference information.

[0105] In one possible implementation, the first configuration information is specifically used to configure the type of measurement results corresponding to K3 reference signal measurement resources out of at least one reference signal measurement resource as interference information; K1 reference signal measurement resources are some or all of the K3 reference signal measurement resources. That is, among the K3 reference signal measurement resources configured by the first configuration information for measuring interference information, the first node can select only the measurement results of K1 reference signal measurement resources out of K3 for reporting.

[0106] For example, the first configuration information configures K ≥ 1 CSI RS resources, indicating in the first configuration information that K1 CSI RS resources are used to measure interference information, and K0 CSI RS resources are used to measure channel state information. After receiving the first configuration information, the first node measures the K1 CSI RS resources to obtain interference information. However, the first node does not need to report the interference information corresponding to all K1 CSI RS resources, but instead selects K%1∈{0,1,…,K1} (where K1 is K1) CSI RS resources to report the interference information based on the measurement results. Figure 1 For example, the second node is configured with CSI-RS resources corresponding to TRP 4 / 5 / 6 / 7 for measuring interference information. The identifier or index of the CSI-RS resources is 1-4. After the first node's measurement, only CSI-RS resources 3 / 4 corresponding to TRP 6 / 7 are selected for measuring interference information, and the feedback bit is "0011".

[0107] The information transmission method provided in this disclosure can be applied to... Figure 3 The second node 302 in the communication system shown. Figure 6 A flowchart illustrating another information transmission method is shown, such as... Figure 6 As shown, the information transmission method includes the following S601 and S602.

[0108] S601, Receive the measurement report sent by the first node.

[0109] The measurement report includes the first type of measurement results for K1 reference signal measurement resources out of multiple reference signal measurement resources; the first type of measurement results includes interference information; K1 is a positive integer.

[0110] S602. Suppress interference on the first node based on interference information.

[0111] The first node can select K1 reference signal measurement resources from the measurement results corresponding to multiple reference signal measurement resources. These K1 measurement results are classified as first-type measurement results, i.e., interference information. In this way, the first node can feed back the interference information obtained from these K1 reference signal measurement resources to the second node through a measurement report. This allows the second node to perform interference suppression based on the interference information, thereby reducing the impact of interfering TRPs in the second node's multiple TRPs on the first node and improving communication performance.

[0112] It should be noted that for descriptions such as measurement reports, please refer to the description on the first node side; the embodiments disclosed herein will not be repeated here.

[0113] It is understood that, in order to achieve the above-mentioned functions, the information transmission device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0114] This disclosure embodiment can divide the information transmission device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0115] Figure 7 This is a schematic diagram of a communication device provided in an embodiment of this disclosure. The communication device can execute the information transmission method provided in the above-described method embodiments. Figure 7 As shown, the communication device includes a measurement unit 701 and a transmission unit 702.

[0116] The measurement unit 701 is used to perform measurements based on multiple reference signal measurement resources and obtain measurement results.

[0117] The sending unit 702 is used to send a measurement report to the second node. The measurement report includes a first type of measurement results of K1 reference signal measurement resources among the plurality of reference signal measurement resources. The first type of measurement results includes interference information. K1 is a positive integer.

[0118] In one possible implementation, the measurement report further includes a second type of measurement results for K0 reference signal measurement resources out of the plurality of reference signal measurement resources, the second type of measurement results including channel state information; K0 is a positive integer.

[0119] In one possible implementation, the measurement report is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources; K = K0 + K1.

[0120] In one possible implementation, the measurement report further includes bitmap information indicating the type of measurement result corresponding to each of the K reference signal measurement resources.

[0121] In one possible implementation, the measurement report may also include an identifier for each reference signal measurement resource, and the type of measurement result associated with the identifier for each reference signal measurement resource.

[0122] In one possible implementation, where K is the number of the plurality of reference signal measurement resources, and the K1 reference signal measurement resources and the K0 reference signal measurement resources are not duplicated, the measurement report is specifically used to indicate the identifier of the reference signal measurement resource corresponding to the first type of measurement result or the second type of measurement result.

[0123] In one possible implementation, the interference information includes K1×N obtained by measuring the K1 reference signal measurement resources. r A number of interference channel matrices, or a value space determined based on the interference channel matrices;

[0124] Wherein, one of the interference channel matrices is an N k The frequency domain channel matrix H is ×M. k,r N r N represents the number of antenna ports in the first node used to receive the reference signal. k M represents the number of antenna ports in the first node used to report the reference signal, and M represents the number of frequency domain units.

[0125] In one possible implementation, the frequency domain channel matrix H k,rIt is represented as follows: multiple spatial basis vectors and multiple frequency basis vectors selected from a preset set of basis vectors, and the linear combination coefficients of the multiple spatial basis vectors and the multiple frequency basis vectors.

[0126] In one possible implementation, the interference information includes indication information of K1×G vectors; the vectors are used to characterize the projection direction of the interference channel matrix obtained by measuring the K1 reference signal measurement resources; the projection direction satisfies a preset size condition; and G is the number of vectors in each of the K1 groups of vectors selected according to the projection direction.

[0127] In one possible implementation, the device further includes a receiving unit 703;

[0128] The receiving unit 703 is configured to receive first configuration information, which is used to configure the plurality of reference signal measurement resources and indicate the type of measurement result corresponding to at least one of the plurality of reference signal measurement resources.

[0129] In one possible implementation, the first configuration information is specifically used to configure the type of the measurement result corresponding to K3 reference signal measurement resources in the at least one reference signal measurement resource as interference information; the K1 reference signal measurement resources are some or all of the K3 reference signal measurement resources.

[0130] In one possible implementation, the measurement report further includes channel state change information; the channel state change information is determined by the first node and obtained by the second node after interference suppression based on the interference information.

[0131] In one possible implementation, the channel state change information is determined based on the interference information and precoding information, wherein the precoding information is preset or estimated by the first node.

[0132] In one possible implementation, the channel state change information includes interference power change information and / or channel quality change information.

[0133] In one possible implementation, the channel state change information is the changed channel state information or the difference compared to the channel state information included in the measurement report.

[0134] In one possible implementation, the channel state change information is used to instruct the second node to determine whether to perform interference suppression based on the channel state change information.

[0135] Figure 8This is a schematic diagram of another communication device provided in an embodiment of this disclosure. The communication device can execute the information transmission method provided in the above-described method embodiments. Figure 8 As shown, the communication device includes a receiving unit 801 and a processing unit 802.

[0136] The receiving unit 801 is configured to receive a measurement report sent by the first node. The measurement report includes first-type measurement results of K1 reference signal measurement resources out of a plurality of reference signal measurement resources. The first-type measurement results include interference information. K1 is a positive integer.

[0137] Processing unit 802 is used to suppress interference on the first node based on the interference information.

[0138] In one possible implementation, the measurement report further includes a second type of measurement results for K0 reference signal measurement resources out of the plurality of reference signal measurement resources, the second type of measurement results including channel state information; K0 is a positive integer.

[0139] In one possible implementation, the measurement report is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources; K = K0 + K1.

[0140] In one possible implementation, the measurement report further includes bitmap information indicating the type of measurement result corresponding to each of the K reference signal measurement resources.

[0141] In one possible implementation, the measurement report may also include an identifier for each reference signal measurement resource, and the type of measurement result associated with the identifier for each reference signal measurement resource.

[0142] In one possible implementation, where K is the number of the plurality of reference signal measurement resources, and the K1 reference signal measurement resources and the K0 reference signal measurement resources are not duplicated, the measurement report is specifically used to indicate the identifier of the reference signal measurement resource corresponding to the first type of measurement result or the second type of measurement result.

[0143] In one possible implementation, the interference information includes K1×N obtained by measuring the K1 reference signal measurement resources. r A number of interference channel matrices, or a value space determined based on the interference channel matrices;

[0144] Wherein, one of the interference channel matrices is an N k The frequency domain channel matrix H is ×M. k,r N rN represents the number of antenna ports in the first node used to receive the reference signal. k M represents the number of antenna ports in the first node used to report the reference signal, and M represents the number of frequency domain units.

[0145] In one possible implementation, the frequency domain channel matrix H k,r It is represented by the following: multiple spatial basis vectors and multiple frequency basis vectors selected from a preset set of basis vectors, and the linear combination coefficients of the multiple spatial basis vectors and the multiple frequency basis vectors.

[0146] In one possible implementation, the interference information includes indication information of K1×G vectors; the vectors are used to characterize the projection direction of the interference channel matrix obtained by measuring the K1 reference signal measurement resources; the projection direction satisfies a preset size condition; and G is the number of vectors in each of the K1 groups of vectors selected according to the projection direction.

[0147] In one possible implementation, the device further includes a transmitting unit 803;

[0148] The transmitting unit 803 is used to transmit first configuration information, which is used to configure the plurality of reference signal measurement resources and indicate the type of measurement result corresponding to at least one of the plurality of reference signal measurement resources.

[0149] In one possible implementation, the first configuration information is specifically used to configure the type of the measurement result corresponding to K3 reference signal measurement resources in the at least one reference signal measurement resource as interference information; the K1 reference signal measurement resources are some or all of the K3 reference signal measurement resources.

[0150] In one possible implementation, the measurement report further includes channel state change information; the channel state change information is determined by the first node and obtained by the second node after interference suppression based on the interference information.

[0151] In one possible implementation, the channel state change information is determined based on the interference information and precoding information, wherein the precoding information is preset or estimated by the first node.

[0152] In one possible implementation, the channel state change information includes interference power change information and / or channel quality change information.

[0153] In one possible implementation, the channel state change information is the changed channel state information or the difference compared to the channel state information included in the measurement report.

[0154] In one possible implementation, the channel state change information is used to instruct the second node to determine whether to perform interference suppression based on the channel state change information.

[0155] In implementing the functionality of the integrated modules described above using hardware, this disclosure provides another possible structure for the communication device involved in the above embodiments. For example... Figure 9 As shown, the communication device 90 includes a processor 902 and a bus 904. Optionally, the communication device may also include a memory 901; alternatively, the communication device may also include a communication interface 903.

[0156] Processor 902 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 902 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 902 may also be a combination that implements computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0157] The communication interface 903 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0158] The memory 901 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0159] In one possible implementation, the memory 901 can exist independently of the processor 902. The memory 901 can be connected to the processor 902 via a bus 904 and is used to store instructions or program code. When the processor 902 calls and executes the instructions or program code stored in the memory 901, it can implement the information transmission method provided in the embodiments of this disclosure.

[0160] In another possible implementation, the memory 901 can also be integrated with the processor 902.

[0161] The 904 bus can be an extended industry standard architecture (EISA) bus, etc. The 904 bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0162] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform the information transmission method as described in any of the above embodiments.

[0163] For example, the computer-readable storage media described above may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices for storing information and / or other machine-readable storage media. The term "machine-readable storage media" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0164] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the information transmission method described in any of the above embodiments. The above descriptions are merely specific implementations of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions within the technical scope disclosed in this disclosure should be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An information transmission method, characterized in that, Applied to the first node, the method includes: Measurements are performed using multiple reference signal measurement resources to obtain measurement results. A measurement report is sent to the second node. The measurement report includes the first type of measurement results of K1 reference signal measurement resources out of the plurality of reference signal measurement resources. The first type of measurement results includes interference information. K1 is a positive integer.

2. The method according to claim 1, characterized in that, The measurement report also includes a second type of measurement results for K0 reference signal measurement resources out of the plurality of reference signal measurement resources. The second type of measurement results includes channel state information; K0 is a positive integer.

3. The method according to claim 2, characterized in that, The measurement report is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources; K = K0 + K1.

4. The method according to claim 3, characterized in that, The measurement report also includes bitmap information, which is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources.

5. The method according to claim 3, characterized in that, The measurement report also includes an identifier for each reference signal measurement resource, and the type of measurement result associated with the identifier for each reference signal measurement resource.

6. The method according to claim 3, characterized in that, When K is the number of the plurality of reference signal measurement resources, and the K1 reference signal measurement resources and the K0 reference signal measurement resources are not duplicated, the measurement report is specifically used to indicate the identifier of the reference signal measurement resource corresponding to the first type of measurement result or the second type of measurement result.

7. The method according to claim 1, characterized in that, The interference information includes K1×N obtained from measurements of the K1 reference signal measurement resources. r A number of interference channel matrices, or a value space determined based on the interference channel matrices; Wherein, one of the interference channel matrices is an N k The frequency domain channel matrix H is ×M. k,r N r N represents the number of antenna ports in the first node used to receive the reference signal. k M represents the number of antenna ports in the first node used to report the reference signal, and M represents the number of frequency domain units.

8. The method according to claim 7, characterized in that, The frequency domain channel matrix H k,r It is represented as follows: multiple spatial basis vectors and multiple frequency basis vectors selected from a preset set of basis vectors, and the linear combination coefficients of the multiple spatial basis vectors and the multiple frequency basis vectors.

9. The method according to claim 1, characterized in that, The interference information includes indication information of K1×G vectors; the vectors are used to characterize the projection direction of the interference channel matrix obtained by measuring the K1 reference signal measurement resources; the projection direction satisfies a preset size condition; G is the number of vectors in each of the K1 groups of vectors selected according to the projection direction.

10. The method according to claim 1, characterized in that, The method further includes: Receive first configuration information, which is used to configure the plurality of reference signal measurement resources and indicate the type of measurement result corresponding to at least one of the plurality of reference signal measurement resources.

11. The method according to claim 10, characterized in that, The first configuration information is specifically used to configure the type of the measurement result corresponding to K3 reference signal measurement resources in the at least one reference signal measurement resource as interference information; the K1 reference signal measurement resources are some or all of the K3 reference signal measurement resources.

12. The method according to claim 1, characterized in that, The measurement report also includes channel state change information; the channel state change information is determined by the first node and obtained by the second node after interference suppression based on the interference information.

13. The method according to claim 12, characterized in that, The channel state change information is determined based on the interference information and the precoding information, wherein the precoding information is preset or estimated by the first node.

14. The method according to claim 12, characterized in that, The channel state change information includes interference power change information and / or channel quality change information.

15. The method according to claim 12, characterized in that, The channel state change information is the changed channel state information or the difference compared to the channel state information included in the measurement report.

16. The method according to claim 12, characterized in that, The channel state change information is used to instruct the second node to determine whether to perform interference suppression based on the channel state change information.

17. An information transmission method, characterized in that, Applied to the second node, the method includes: Receive a measurement report sent by the first node, the measurement report including first-type measurement results of K1 reference signal measurement resources out of a plurality of reference signal measurement resources; the first-type measurement results include interference information; K1 is a positive integer; The interference is suppressed on the first node based on the interference information.

18. The method according to claim 17, characterized in that, The measurement report also includes a second type of measurement results for K0 reference signal measurement resources out of the plurality of reference signal measurement resources. The second type of measurement results includes channel state information; K0 is a positive integer.

19. The method according to claim 18, characterized in that, The measurement report is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources; K = K0 + K1.

20. The method according to claim 19, characterized in that, The measurement report also includes bitmap information, which is used to indicate the type of measurement result corresponding to each of the K reference signal measurement resources.

21. The method according to claim 19, characterized in that, The measurement report also includes an identifier for each reference signal measurement resource, and the type of measurement result associated with the identifier for each reference signal measurement resource.

22. The method according to claim 19, characterized in that, When K is the number of the plurality of reference signal measurement resources, and the K1 reference signal measurement resources and the K0 reference signal measurement resources are not duplicated, the measurement report is specifically used to indicate the identifier of the reference signal measurement resource corresponding to the first type of measurement result or the second type of measurement result.

23. The method according to claim 17, characterized in that, The interference information includes K1×N obtained from measurements of the K1 reference signal measurement resources. r A number of interference channel matrices, or a value space determined based on the interference channel matrices; Wherein, one of the interference channel matrices is an N k The frequency domain channel matrix H is ×M. k,r N r N represents the number of antenna ports in the first node used to receive the reference signal. k M represents the number of antenna ports in the first node used to report the reference signal, and M represents the number of frequency domain units.

24. The method according to claim 23, characterized in that, The frequency domain channel matrix H k,r It is represented by the following: multiple spatial basis vectors and multiple frequency basis vectors selected from a preset set of basis vectors, and the linear combination coefficients of the multiple spatial basis vectors and the multiple frequency basis vectors.

25. The method according to claim 17, characterized in that, The interference information includes indication information of K1×G vectors; the vectors are used to characterize the projection direction of the interference channel matrix obtained by measuring the K1 reference signal measurement resources; the projection direction satisfies a preset size condition; G is the number of vectors in each of the K1 groups of vectors selected according to the projection direction.

26. The method according to claim 17, characterized in that, The method further includes: Send first configuration information, which is used to configure the plurality of reference signal measurement resources and indicate the type of measurement result corresponding to at least one of the plurality of reference signal measurement resources.

27. The method according to claim 26, characterized in that, The first configuration information is specifically used to configure the type of the measurement result corresponding to K3 reference signal measurement resources in the at least one reference signal measurement resource as interference information; the K1 reference signal measurement resources are some or all of the K3 reference signal measurement resources.

28. The method according to claim 17, characterized in that, The measurement report also includes channel state change information; the channel state change information is determined by the first node and obtained by the second node after interference suppression based on the interference information.

29. The method according to claim 28, characterized in that, The channel state change information is determined based on the interference information and the precoding information, wherein the precoding information is preset or estimated by the first node.

30. The method according to claim 28, characterized in that, The channel state change information includes interference power change information and / or channel quality change information.

31. The method according to claim 28, characterized in that, The channel state change information is the changed channel state information or the difference compared to the channel state information included in the measurement report.

32. The method according to claim 28, characterized in that, The channel state change information is used to instruct the second node to determine whether to perform interference suppression based on the channel state change information.

33. A communication device, characterized in that, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1-32.

34. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-32.

35. A computer program product, characterized in that, The computer program product includes computing technology program instructions, which, when executed by a processor, implement the method as described in any one of claims 1-32.

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