A communication method, a communication node, a storage medium, and a program product

Abstract

The application provides a communication method, a communication node, a storage medium and a program product. The method comprises the following steps: receiving first signaling, wherein the first signaling is used for indicating that a first communication node reports channel state information (CSI) of at least one CSI-reference signal (CSI-RS) resource combination; reporting first CSI according to the first signaling; and indicating, by the first signaling, that the first communication node reports the CSI of the CSI-RS resource combination. The first communication node determines at least one CSI-RS resource combination that needs to be reported based on the indication of the first signaling, and then reports the first CSI, thereby solving the inconsistency between the actual required CSI and the reported CSI. The second communication node can indicate, through the first signaling, which CSI-RS resource combination the first communication node reports the CSI of, thereby improving the accuracy of CSI reporting and avoiding the waste of resources caused by the mismatch of the reported information.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a communication method, communication node, storage medium, and program product. Background Technology

[0002] Distributed Multi-input Multi-output (DMIMO) systems offer more uniform and stable quality of service compared to centralized MIMO systems. To ensure performance gains, distributed transmitting nodes need to acquire Channel State Information (CSI) to calculate precoding vectors, thereby enhancing signal quality and suppressing interference. Transmitting nodes typically obtain CSI from feedback from receiving nodes, and the accuracy of this feedback significantly impacts system performance.

[0003] In existing schemes, the network side transmits a CSI-Reference Signal (CSI-RS), which includes multiple CSI-RS resources, each corresponding to a Transmit and Receive Point (TRP). The User Equipment (UE) measures the CSI-RS and selects some or all of them for feedback, equivalent to selecting the corresponding serving TRP. The CSI fed back by the UE typically includes Precoding Matrix Indicator (PMI), which quantizes the right singular vector of the channel matrix formed by the serving TRP and the UE. However, the PMI is merely a recommendation from the UE to the network side; the network side flexibly determines the precoding vector based on the actual situation. If the TRP corresponding to the CSI fed back by the UE is inconsistent with the actual set of serving UEs (i.e., the CSI fed back by the UE is inconsistent with the CSI required by the network side), the network side cannot obtain the precoding vector of the actual TRP set from the fed-back CSI. Summary of the Invention

[0004] This application provides a communication method, communication node, storage medium, and program product to solve the problem of inconsistency between the actual required CSI and the feedback CSI.

[0005] To achieve the above objectives, embodiments of this application provide a communication method applied to a first communication node, comprising:

[0006] Receive a first signaling, the first signaling being used to instruct the first communication node to report CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources;

[0007] The first CSI is reported according to the first signaling.

[0008] To achieve the above objectives, embodiments of this application provide another communication method applied to a second communication node, including:

[0009] Send a first signaling message, the first signaling message being used to instruct the first communication node to report CSI for at least one CSI-RS resource combination;

[0010] The first CSI is received, and the first CSI reports according to the first signaling.

[0011] To achieve the above objectives, embodiments of this application provide a communication node, including: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for implementing communication between the processor and the memory. When the program is executed by the processor, it implements the steps of the communication method as described in any one of the embodiments of this application.

[0012] To achieve the above objectives, embodiments of this application provide a storage medium for computer-readable storage, wherein the storage medium stores one or more programs, which can be executed by one or more processors to implement the steps of the communication method described in any one of the embodiments of this application.

[0013] To achieve the above objectives, embodiments of this application provide a computer program product, which includes a computer program that, when executed by a processor, implements the communication method described in any one of the embodiments of this application.

[0014] The communication method, communication node, storage medium, and program product provided in this application embodiment include: a first communication node receiving a first signaling, which instructs the first communication node to report CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources; the first communication node reports a first CSI according to the first signaling; the first signaling instructs the first communication node to report CSI for the CSI-RS resource combination; the first communication node determines at least one CSI-RS resource combination that needs to be reported based on the instruction of the first signaling, and then reports the first CSI, thus solving the problem of inconsistency between the actual required CSI and the fed-in CSI; a second communication node can instruct the first communication node to report which CSI-RS resource combinations according to needs through the first signaling, thereby improving the accuracy of CSI reporting and avoiding resource waste caused by mismatched reported information.

[0015] Further details regarding the above embodiments and other aspects of this application, as well as their implementations, are provided in the accompanying drawings, detailed description, and claims. Attached Figure Description

[0016] Figure 1 An example diagram of a network architecture provided for one embodiment;

[0017] Figure 2 A flowchart illustrating a communication method provided in one embodiment;

[0018] Figure 3 A flowchart illustrating another communication method provided in one embodiment;

[0019] Figure 4 A schematic diagram of the structure of a communication device provided in one embodiment;

[0020] Figure 5 A schematic diagram of the structure of another communication device provided in one embodiment;

[0021] Figure 6 This is a schematic diagram of the structure of a communication node provided in one embodiment. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0023] In wireless communication systems, the transmitting and receiving ends are typically configured with multiple antennas to form a MIMO system, utilizing spatial division multiplexing technology to improve transmission rates. Depending on whether the base station antennas are deployed in the same area, MIMO transmission is divided into centralized and distributed types. Distributed MIMO utilizes TRPs (Transmission Platforms) in different geographical locations to serve UEs, shortening the distance between the UE and the TRPs and providing a more uniform quality of service. Simultaneously, coordinated transmission between TRPs can better suppress interference and improve spectrum efficiency. The 5G NR Release 18 protocol completed the standardization of Coherent Joint Transmission (CJT) as a working mode of distributed MIMO.

[0024] For 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 the 5G NR standard specification, the base station obtains channel state information mainly based on UE feedback, and its basic principle is briefly described below. Figure 1 An example diagram of a network architecture is provided, such as... Figure 1 As shown, TX1, TX2...TXK represent K senders, and RX represents a receiver; there are K TRPs in the network serving the UE in CJT mode. Assume the k-th TRP has N... kThere 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.

[0025] To obtain channel state information, each TRP transmits a downlink reference signal, and the UE measures the reference signal of each TRP to obtain the channel state information H. k By concatenating these components, the global channel state information (H) can be obtained. Based on the global channel information, the UE selects K0 TRPs from the K TRPs to transmit data and provides feedback for the corresponding K0 CSI-RS resources. Specifically, the protocol stipulates that the base station and the UE share a codebook {c1,c2,...,c...} B The UE determines the data transmission layer number, i.e., the Rank Indicator (RI), based on specific criteria, and selects specific codewords from the codebook as recommended precoding vectors, feeding this information back to the base station via the PMI. Simultaneously, the UE combines interference measurement information and assumes the base station uses the codewords indicated by the PMI as precoding vectors to calculate the Signal-to-Interference-Noise Ratio (SINR), further converting it into a Channel Quality Indicator (CQI) and feeding it back to the base station.

[0026] Figure 2 A flowchart of a communication method provided in one embodiment, such as Figure 2 As shown, the communication method described in this application embodiment is applied to a first communication node, exemplarily, the first communication node is a UE; the method includes S110-S120:

[0027] S110. Receive the first signaling, which instructs the first communication node to report CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources.

[0028] In this embodiment, the first signaling can be understood as a communication instruction; the first signaling is used to instruct the first communication node to report CSI for at least one CSI-RS resource combination, or it can be understood as the first signaling to instruct the first communication node to report which CSI-RS resource combinations. A CSI-RS resource combination can be understood as a combination of CSI-RS resources, and a CSI-RS resource combination may include one or more CSI-RS resources.

[0029] The first signaling can be generated and sent by the second communication node. The second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the business scenario. Alternatively, the second communication node can send CSI-RS resources to the first communication node and determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the CSI-RS resources sent to the first communication node; or, the second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the information reported by the first communication node; or, the second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node using a combination of the above methods, etc. After determining one or more CSI-RS resource combinations that need to be reported by the first communication node, the second communication node generates and sends the first signaling based on the aforementioned one or more CSI-RS resource combinations. The first communication node communicates with the second communication node and receives the first signaling sent by the second communication node.

[0030] When indicating a CSI-RS resource combination, the first signaling can indicate information about the combination, such as the identifier ID of the CSI-RS resource combination, or it can directly indicate the CSI-RS resources included in the CSI-RS resource combination. For example, the first communication node and the second communication node agree on the CSI-RS resources included in different CSI-RS resource combinations. For instance, CSI-RS resource combination 1 includes CSI-RS resource 1, CSI-RS resource 2, and CSI-RS resource 3, and the ID of CSI-RS resource combination 1 is 1. CSI-RS resource combination 2 includes CSI-RS resource 1 and CSI-RS resource 2, and the ID of CSI-RS resource combination 2 is 2. The second communication node can indicate CSI-RS resource combination 1 by carrying 1 in the first signaling, or the second communication node can indicate CSI-RS resource combination 2 by carrying 2 in the first signaling, or the second communication node can indicate CSI-RS resource combination 1 and CSI-RS resource combination 2 by carrying both 1 and 2 in the first signaling. Alternatively, the second communication node may directly indicate the CSI-RS resources included in the CSI-RS resource combination. For example, if the first signaling carries the CSI-RS resource combination {1,2}, {1,3} and {2,3,4}, it means that the first communication node reports the CSI-RS resource combination {1,2}, {1,3} and {2,3,4}.

[0031] S120. Report the first CSI according to the first signaling.

[0032] In this embodiment, the first CSI can be understood as a type of CSI information, such as a CSI report.

[0033] After receiving the first signaling, the first communication node determines the CSI-RS resource combinations that need to be reported according to the instructions of the first signaling. Then, it determines the CSI-RS resources included in each CSI-RS resource combination and reports the CSI based on the CSI-RS resources included in each CSI-RS resource combination, that is, it reports the first CSI. Each CSI-RS resource combination can be reported separately or reported uniformly.

[0034] The communication method provided in this application embodiment includes a first communication node receiving a first signaling, which instructs the first communication node to report CSI for at least one CSI-RS resource combination. The first communication node reports a first CSI according to the first signaling. The first signaling instructs the first communication node to report CSI for CSI-RS resource combinations. Based on the instruction of the first signaling, the first communication node determines at least one CSI-RS resource combination that needs to be reported, and then reports the first CSI. This solves the problem of inconsistency between the actual required CSI and the reported CSI. A second communication node can, according to requirements, instruct the first communication node via the first signaling to report which CSI-RS resource combinations to report, improving the accuracy of CSI reporting and avoiding resource waste due to mismatched reported information.

[0035] In some embodiments, the method further includes: receiving a second signaling message for determining a set of CSI-RS resource combinations, the set of CSI-RS resource combinations including CSI-RS resource combinations.

[0036] In this embodiment, the second signaling can be understood as a type of communication signaling; the second signaling is used to determine the CSI-RS resource combination set. The second signaling can directly indicate the CSI-RS resource combination set or indirectly indicate the CSI-RS resource combination set. The CSI-RS resource combination set can be understood as a set composed of CSI-RS resource combinations; for example, the CSI-RS resource combination set can directly include one or more CSI-RS resource combinations, or it can include one or more subsets of CSI-RS resource combinations, where the subsets of CSI-RS resource combinations include one or more CSI-RS resource combinations; or, the CSI-RS resource combination set includes one or more CSI-RS resource combinations and one or more subsets of CSI-RS resource combinations, where the subsets of CSI-RS resource combinations include one or more CSI-RS resource combinations.

[0037] The second signaling can be generated by the second communication node. The second communication node can determine the CSI-RS resource combination set or related information about the CSI-RS resource combination set, generate the second signaling based on the CSI-RS resource combination set or related information, and send it. The first communication node communicates with the second communication node and receives the second signaling sent by the second communication node. The second signaling can be sent simultaneously with the first signaling or sequentially; the second signaling is usually sent before the first communication node reports the first CSI. The first communication node can determine the CSI resource combination set based on the second signaling and determine at least one CSI-RS resource combination that needs to be reported based on the first information.

[0038] In some embodiments, the second signaling is associated with a set of CSI-RS resources; and / or, the second signaling indicates a set of CSI-RS resource combinations.

[0039] The second signaling can be associated with a CSI-RS resource set, which may include one or more CSI-RS resources. Upon receiving the second signaling, the first communication node can determine a set of CSI-RS resource combinations based on its associated CSI-RS resource set. For example, if the CSI-RS resource set includes CSI-RS resource 1, CSI-RS resource 2, and CSI-RS resource 3, the set of CSI-RS resource combinations could be {{1},{2},{3},{1,2},{1,3},{2,3},{1,2,3}}. Alternatively, the second signaling can directly indicate the set of CSI-RS resource combinations. For example, the second signaling may carry a set of CSI-RS resource combinations, which could be {{1},{2},{3},{1,2},{1,3},{2,3},{1,2,3}}.

[0040] In some embodiments, prior to receiving the first signaling, the method further includes: reporting a second CSI.

[0041] In this embodiment, the second CSI can be understood as a type of CSI information, such as a CSI report. The first communication node can first perform CSI measurement and then report the second CSI based on the measurement results. The second communication node can receive the second CSI reported by the first communication node, determine the CSI-RS resource combination that needs to be reported by the first communication node based on the second CSI, and then generate a first signaling and send it to the first communication node.

[0042] For example, the implementation may also be as follows: the second communication node sends a third signaling to the first communication node, indicating a CSI-RS resource set through the third signaling; after receiving the third signaling, the first communication node performs CSI-RS measurements according to the CSI-RS resource set indicated by the third signaling and reports the second CSI; after receiving the second CSI, the second communication node generates a first signaling based on the second CSI and sends it to the first communication node; after receiving the first signaling, the first communication node reports the first CSI based on the first signaling. For example, the third signaling may be the second signaling.

[0043] In some embodiments, the first signaling and the second signaling are contained in the same signaling, or the first signaling and the second signaling are contained in different signaling.

[0044] The first and second signaling can be contained in the same signaling, meaning that both the first and second signaling are carried in one signaling. The second signaling instructs the CSI-RS resource set or the CSI-RS resource combination set, while the first signaling instructs the first communication node to report CSI to at least one CSI-RS resource combination. Alternatively, the first and second signaling can be contained in different signaling. In this case, the first and second signaling can be sent / received simultaneously or sequentially.

[0045] In some embodiments, the first signaling includes at least one of the following: a media access control layer control element, downlink control information, and CSI reporting configuration signaling.

[0046] For example, the first signaling may be a Media Access Control-Control Element (MAC-CE), that is, the second communication node may use the MAC-CE to instruct at least one CSI-RS resource combination in the CSI-RS resource combination set.

[0047] For example, the first signaling can be downlink control information (DCI), meaning that the second communication node can also use DCI to indicate at least one CSI-RS resource combination in the CSI-RS resource combination set.

[0048] For example, the first signaling can be CSI reporting configuration signaling, that is, the second communication node can also use CSI reporting configuration signaling to indicate at least one CSI-RS resource combination in the CSI-RS resource combination set.

[0049] For example, the first signaling may include MAC-CE and DCI; for instance, the second communication node indicates a subset of CSI-RS resource combinations in the CSI-RS resource combination set via MAC-CE, and further indicates at least one CSI-RS resource combination in the subset via DCI; or, the second communication node indicates a subset of CSI-RS resource combinations in the CSI-RS resource combination set via DCI, and further indicates at least one CSI-RS resource combination in the subset via MAC-CE. Alternatively, the first signaling transmitted at different times may be either MAC-CE or DCI; for instance, the second communication node indicates at least one CSI-RS resource combination in the CSI-RS resource combination set via MAC-CE at time t1, and at least one CSI-RS resource combination in the CSI-RS resource combination set via DCI at time t2; or, the second communication node indicates at least one CSI-RS resource combination in the CSI-RS resource combination set via DCI at time t1, and at least one CSI-RS resource combination in the CSI-RS resource combination set via MAC-CE at time t2.

[0050] In some embodiments, the second signaling includes CSI reporting configuration signaling.

[0051] For example, the second signaling may be CSI reporting configuration signaling, which indicates the CSI-RS resource set and / or CSI-RS resource combination set.

[0052] In some embodiments, reporting a first CSI according to a first signaling includes at least one of the following:

[0053] For each CSI-RS resource combination indicated by the first signaling, CSI reporting is performed;

[0054] Select at least one CSI-RS resource combination from the CSI-RS resource combination indicated by the first signaling to report CSI.

[0055] When the first communication node reports the first CSI according to the first signaling, it can report all CSI-RS resource combinations indicated by the first signaling; the first communication node can also determine all CSI-RS resource combinations indicated by the first signaling and select one or more CSI-RS resource combinations from the above-mentioned CSI-RS resource combinations for CSI reporting.

[0056] In some embodiments, the first CSI includes at least one of the following:

[0057] CSI-RS resource indicator (CRI), rank indicator (RI), precoding matrix indicator (PMI), and channel quality indicator (CQI).

[0058] In some embodiments, the second CSI includes at least one of the following:

[0059] CSI-RS resource indicator, rank indicator, precoding indicator, channel quality indicator.

[0060] In some embodiments, the CSI-RS resource portfolio includes at least one CSI-RS resource, and the first reported CSI includes PMI;

[0061] The PMI meets at least one of the following criteria:

[0062] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0063] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0064] The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same;

[0065] The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0066] The first CSI reported by the first communication node may include PMIs. The first communication node can report different CSI-RS resource combinations. The CSI-RS resources in different CSI-RS resource combinations may be the same or different. That is, the CSI-RS resources included in different CSI-RS resource combinations may be completely different or not completely the same (i.e., partially the same). Therefore, when reporting multiple CSI-RS resource combinations, there may be some duplicate CSI-RS resources. Therefore, when the reported first CSI includes PMIs, the PMIs included in the reported first CSI satisfy at least one of the following: the number of spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the number of frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same; and the frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0067] For example, the number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same. This can be understood as follows: when different CSI-RS resource combinations contain the same CSI-RS resource, the number of spatial basis vectors of the PMI corresponding to this CSI-RS resource is the same. For example, if both CSI-RS resource combination 1 and CSI-RS resource combination 2 include the same CSI-RS resource 1, then when performing CSI reporting, the number of spatial basis vectors of the PMI corresponding to CSI-RS resource 1 is the same regardless of whether it is in CSI-RS resource combination 1 or CSI-RS resource combination 2. Similarly, the meanings of having the same number of frequency domain basis vectors, the same number of spatial basis vectors, and the same number of frequency domain basis vectors are similar to the meaning of having the same number of spatial basis vectors mentioned above. Those skilled in the art can refer to the meaning of having the same number of spatial basis vectors to determine the meanings of having the same number of frequency domain basis vectors, the same number of spatial basis vectors, and the same number of frequency domain basis vectors. This application embodiment will not elaborate further on this.

[0068] If PMI meets at least one of the above conditions, for the same CSI-RS resource in different CSI-RS resource combinations, CSI reporting can be performed only once, avoiding duplicate reporting, wasting resources, and effectively reducing feedback overhead. For example, if CSI-RS resource 1 is included in both CSI-RS resource combinations, CSI-RS resource 1 will only be reported once.

[0069] In some embodiments, the reported first CSI and second CSI include PMI, wherein the PMI satisfies at least one of the following:

[0070] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same.

[0071] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0072] The spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0073] The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0074] When both the first CSI and the second CSI include PMIs, the first CSI and the second CSI can report for the same CSI-RS resource. For example, the first communication node first reports the second CSI for CSI-RS resource 1, then receives the first signaling, and reports the first CSI for CSI-RS resource 1 according to the instruction of the first signaling. That is, the first CSI and the second CSI report for the same CSI-RS resource. Therefore, when the reported first CSI and the second CSI include PMIs, the PMIs included in the reported first CSI and the second CSI satisfy at least one of the following: the number of spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; the number of frequency basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; the spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same; and the frequency basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0075] For example, when the first communication node reports CSI-RS resources 1, 2, and 3 at the first moment, and the second communication node indicates CSI-RS resource 1 at the second moment, the reported spatial / frequency domain basis vector (vector) is the same as that of resource 1 reported at the first moment.

[0076] When the first and second CSI reports include PMI, the PMI must satisfy at least one of the above conditions. For the same CSI-RS resource, CSI reporting can be done only once, avoiding duplicate reporting, wasting resources, and effectively reducing feedback overhead. For example, if the second CSI has already reported CSI-RS resource 1, the first CSI does not need to report CSI-RS resource 1 again.

[0077] For example, signaling can be used to indicate whether the conditions required for the PMI to be activated are met. For instance, a fourth signaling can be used to indicate that the PMI must meet at least one of the conditions described above.

[0078] In some embodiments, a fourth signaling is received, the fourth signaling being used to indicate whether the PMIs included in the reported first CSI satisfy a first condition; the first condition includes at least one of the following: the number of spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the number of frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same; the frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0079] In some embodiments, a fifth signaling is received, the fifth signaling being used to indicate whether the PMIs included in the reported first CSI and second CSI satisfy a second condition; the second condition includes at least one of the following: the number of spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the number of frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; the spatial basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same; the frequency basis vectors of the PMIs corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0080] For example, the fourth and fifth signaling messages can be the same signaling message or different signaling messages. That is, the same signaling message can be used to indicate whether the PMI included in the reported first CSI meets the first condition, and to indicate whether the PMI included in the reported first CSI and second CSI meets the second condition; alternatively, two separate signaling messages can be used to indicate this. This application embodiment does not limit this. The fourth and fifth signaling messages can be sent by the second communication node.

[0081] In some embodiments, the method further includes: receiving deviation information corresponding to CSI-RS resources; and calculating a channel quality indicator based on the deviation information.

[0082] In this embodiment, the deviation information can be one or more types of information such as time-domain deviation, frequency deviation, power deviation, and phase deviation. The deviation information affects the channel quality indicator (CMI), therefore, the CMI can be calculated based on the deviation information. The first communication node can receive the deviation information corresponding to the CSI-RS resource, determine the impact of the deviation information on the precoding vector, and then calculate the CMI based on the precoding vector.

[0083] In some embodiments, the deviation information includes at least one of the following:

[0084] Frequency deviation information;

[0085] Phase deviation information.

[0086] In this embodiment, frequency deviation information can be understood as information describing frequency deviation, such as frequency deviation, relative frequency deviation, etc. Among them, frequency deviation can directly describe the frequency difference, and relative frequency deviation can describe the relative value of the frequency with respect to a certain frequency.

[0087] In this embodiment, phase deviation information can be understood as information describing phase deviation, such as phase deviation, relative phase deviation, etc., where phase deviation can directly describe the phase difference value, and relative phase deviation can describe the relative value of a phase with respect to a certain phase.

[0088] In some embodiments, the frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range;

[0089] In some embodiments, the phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

[0090] In some embodiments, calculating a channel quality indicator based on deviation information includes: determining a precoding vector based on the deviation information and the feedback PMI; and calculating a channel quality indicator based on the precoding vector.

[0091] In this embodiment, the feedback PMI can be understood as the PMI reported during CSI reporting. The feedback PMI is corrected based on the deviation information to obtain a precoding vector, and the channel quality indicator is further calculated based on the precoding vector.

[0092] In the prior art, the feedback PMI is usually directly used as the precoding vector. However, due to the deviation of CSI-RS resources, the precoding vector calculated in this way is inaccurate. The embodiments of this application correct the feedback PMI through deviation information to obtain an accurate precoding vector, and finally calculate the channel quality indicator based on the accurate precoding vector.

[0093] In some embodiments, the precoded vectors used for the layer l data include at least one of the following:

[0094]

[0095] Where, φ g The value is determined based on the phase deviation information in the deviation information. For the σth layer of layer lg PMI corresponding to each CSI-RS resource, σ g Let g be the identifier of the g-th CSI-RS resource in the CSI-RS resource portfolio, where g = 1, 2, ..., G, and G is the number of CSI-RS resources included in the CSI-RS resource portfolio. θ g The value of N is determined based on the frequency deviation information in the deviation information, and N3 is the number of frequency domain units.

[0096] For example, the CSI-RS resource combination is [2,3], σ1=2, σ2=3. The PMI is the second CSI-RS resource in layer l.

[0097] Determine φ using deviation information g and θ g According to φ g and θ g The precoding vector is determined, and its form can be any one or more of the three forms mentioned above. The φ value is determined based on the deviation information. g and θ g By substituting these values ​​into the form of at least one of the precoding vectors mentioned above, a precoding vector can be obtained.

[0098] If there is only one form of precoding vector, the precoding vector can be obtained directly; if there are multiple forms of precoding vector, multiple precoding vectors can be obtained, and multiple precoding vectors can be combined to obtain a final precoding vector for use.

[0099] The first communication node, using the aforementioned precoding vector format, can assess the impact of cross-site synchronization errors on performance. Based on this precoding vector format, the SINR of each layer's data can be obtained, which is then further converted into the reported CQI. After receiving the reported CSI, the second communication node can more accurately assess whether cross-site cooperation should be adopted.

[0100] Figure 3 A flowchart of another communication method provided in one embodiment, such as Figure 3 As shown, the communication method described in this application embodiment is applied to a second communication node, exemplarily, the second communication node is the network side; the method includes S210-S220:

[0101] S210. Send a first signaling message, which instructs the first communication node to report CSI for at least one CSI-RS resource combination.

[0102] The second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the business scenario. Alternatively, the second communication node can send CSI-RS resources to the first communication node and determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the CSI-RS resources sent to the first communication node. Or, the second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node based on the information reported by the first communication node. Or, the second communication node can determine one or more CSI-RS resource combinations that need to be reported by the first communication node by combining the above methods, and so on. After determining one or more CSI-RS resource combinations that need to be reported by the first communication node, the second communication node generates and sends a first signaling based on the above one or more CSI-RS resource combinations. When indicating the CSI-RS resource combinations, the first signaling can indicate the information of the combination, such as the identifier ID of the CSI-RS resource combination, or it can directly indicate the CSI-RS resources included in the CSI-RS resource combination, and so on.

[0103] S220, Receive the first CSI.

[0104] In some embodiments, the first CSI reports according to the first signaling.

[0105] The second communication node receives the first CSI reported by the first communication node. The first CSI can be reported according to the first signaling. After receiving the first signaling, the first communication node determines the CSI-RS resource combinations that need to be reported according to the instructions of the first signaling, then determines the CSI-RS resources included in each CSI-RS resource combination, and reports the CSI based on the CSI-RS resources included in each CSI-RS resource combination, that is, reports the first CSI. Each CSI-RS resource combination can be reported separately or reported uniformly.

[0106] The communication method provided in this application embodiment involves a second communication node sending a first signaling message, which instructs a first communication node to report CSI for at least one CSI-RS resource combination. The second communication node receives a first CSI reported according to the first signaling message. By instructing the first communication node to report CSI for CSI-RS resource combinations through the first signaling message, the first communication node can determine at least one CSI-RS resource combination that needs to be reported based on the instruction of the first signaling message, and then report the first CSI. This solves the problem of inconsistency between the actual required CSI and the fed-in CSI. The second communication node can instruct the first communication node to report which CSI-RS resource combinations according to needs through the first signaling message, thereby improving the accuracy of CSI reporting and avoiding resource waste caused by mismatched reported information.

[0107] In some embodiments, the method further includes: sending a second signaling, the second signaling being used to determine a set of Channel State Information Reference Signal (CSI-RS) resource combinations, the set of CSI-RS resource combinations including CSI-RS resource combinations.

[0108] In some embodiments, the method further includes, before sending the first signaling, receiving a second CSI and generating the first signaling based on the second CSI.

[0109] In some embodiments, the method further includes, before sending the first signaling, receiving a second CSI; the second CSI being used to generate the first signaling.

[0110] In some embodiments, the second signaling is associated with a CSI-RS resource set; and / or, the second signaling indicates a CSI-RS resource combination set.

[0111] In some embodiments, the first signaling and the second signaling are contained in the same signaling, or the first signaling and the second signaling are contained in different signaling.

[0112] In some embodiments, the first signaling includes at least one of the following: a media access control layer control element, downlink control information, and CSI reporting configuration signaling.

[0113] In some embodiments, the second signaling includes CSI reporting configuration signaling.

[0114] In some embodiments, receiving the first CSI includes at least one of the following:

[0115] Receive CSIs reported according to each CSI-RS resource combination indicated by the first signaling;

[0116] Receive CSIs reported from at least one CSI-RS resource combination selected from the CSI-RS resource combination indicated by the first signaling.

[0117] In some embodiments, the first CSI includes at least one of the following: CSI-RS resource indicator, rank indicator, precoding indicator PMI, and channel quality indicator.

[0118] In some embodiments, the second CSI includes at least one of the following: CSI-RS resource indicator, rank indicator, precoding indicator PMI, and channel quality indicator.

[0119] In some embodiments, the CSI-RS resource portfolio includes at least one CSI-RS resource, and the first reported CSI includes PMI;

[0120] The PMI satisfies at least one of the following:

[0121] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0122] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0123] The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same;

[0124] The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0125] In some embodiments, the reported first CSI and second CSI include PMI, wherein the PMI satisfies at least one of the following:

[0126] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0127] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0128] The spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same;

[0129] The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0130] In some embodiments, the method further includes: sending deviation information corresponding to the CSI-RS resource.

[0131] In some embodiments, the deviation information includes at least one of the following:

[0132] Frequency deviation information;

[0133] Phase deviation information.

[0134] In some embodiments, the frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range;

[0135] In some embodiments, the phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

[0136] The communication process is described using the following implementation method:

[0137] The communication process is explained using the example of the first communication node being the UE and the second communication node being the network side.

[0138] In the existing scheme, the network side sends a CSI reference signal containing multiple CSI-RS resources, each corresponding to a Transmitter-Receiver Node (TRP). The UE measures the CSI-RS and selects some or all of them for feedback, which is equivalent to selecting the corresponding serving TRP. However, this scheme may have the following problems:

[0139] Question 1: The CSI fed back by the UE typically includes Precoding Indication Information (PMI), which quantizes the right singular vector of the channel matrix formed by the serving TRP and the UE. However, the PMI is merely a recommendation from the UE to the network side, which flexibly determines the precoding vector based on the actual situation. If the actual set of serving TRPs differs from the preset set of TRPs fed back by the UE, the precoding vector of the actual TRP set cannot be obtained from the fed-back PMI. Specifically, assuming the UE feeds back CSI-RS resources corresponding to TRPs 1 / 2 / 3, the fed-back PMI can be understood as a right singular vector V of H = [H1, H2, H3]. Assuming that due to scheduling constraints, only TRPs 1 / 2 can serve the UE at a certain moment, the network side wants to obtain a right singular vector V' of H' = [H1, H2]. However, the network side cannot extract the information of V' from V.

[0140] Question 2: In actual deployment, different TRPs may belong to different sites, meaning the baseband units (BBUs) connected to the two TRPs may be different. Typically, TRPs at the same site tend to have higher synchronization accuracy, while cross-site TRPs exhibit synchronization errors. However, in existing solutions, the UE cannot access more information about the CSI-RS resources, and therefore cannot ascertain the synchronization accuracy of the TRP corresponding to the CSI-RS, potentially leading to deviations in the calculation of the feedback CSI.

[0141] The above-mentioned problems can be solved by the following implementation methods provided in the embodiments of this application.

[0142] Implementation Method 1

[0143] To obtain downlink channel state information, the UE needs to measure the downlink reference signal transmitted by the network. Taking CSI-RS as an example, the UE's CSI reporting process is as follows:

[0144] 1. The UE receives a second signaling sent by the network side. For example, the second signaling may be a CSI reporting configuration signaling, which is associated with a CSI-RS resource set.

[0145] 2. The UE determines a CSI report (e.g., a first CSI report or a second CSI report) based on the second signaling and the CSI-RS resource set; the CSI report contains at least one of the following: CSI-RS resource indication (CRI, rank indication RI, precoding indication PMI, channel quality indication CQI);

[0146] 3. The UE reports the CSI report to the network side.

[0147] Implementation Method 2

[0148] As described in Implementation 1, the CSI-RS resource set associated with the second signaling includes K CSI-RS resources, where K ≥ 1. The network side determines a set of CSI-RS resource combinations and instructs the UE to report CSI for at least one CSI-RS resource combination via signaling. For example, the first signaling instructs the UE to report CSI for at least one CSI-RS resource combination. The instruction methods include, but are not limited to:

[0149] CSI reports configuration signaling instructions (e.g., CSI reports configuration signaling instructions for at least one CSI-RS resource combination from the CSI-RS resource combination set and the CSI-RS resource combination set);

[0150] The CSI-RS resource combination set is indicated by the configuration signaling reported by CSI, and at least one CSI-RS resource combination in the CSI-RS resource combination set is further indicated by MAC-CE.

[0151] The CSI reports the configuration signaling to indicate the CSI-RS resource combination set, and further indicates at least one CSI-RS resource combination in the CSI-RS resource combination set through DCI;

[0152] The configuration signaling reported by CSI indicates the set of CSI-RS resource combinations, and further indicates the subset of CSI-RS resource combinations in the set of CSI-RS resource combinations through MAC-CE, and further indicates at least one CSI-RS resource combination in the subset of CSI-RS resource combinations through DCI.

[0153] Based on the first signaling instruction, the CSI reporting methods agreed upon by the network side and the UE include, but are not limited to:

[0154] CSI reporting is performed for each CSI-RS resource combination indicated by the first signaling;

[0155] Select one of the CSI-RS resource combinations indicated by the first signaling to report CSI.

[0156] The CSI reporting configuration design addresses problem 1 above. Assuming TRP 1 / 2 / 3 coordinate to serve the UE, sending CSI-RS resources 1 / 2 / 3 respectively. Assuming the network side believes the UE is likely to be served by either TRP 1 / 2 / 3 or TRP 1 / 2, the first signaling (e.g., the CSI reporting configuration signaling) can indicate two CSI-RS resource combinations: CSI-RS resource {1,2,3} and CSI-RS resource {1,2}. The UE can report CSI for each CSI-RS resource combination, i.e., return right singular vectors H = [H1,H2,H3] and H' = [H1,H2] respectively. Upon receiving the CSI feedback, the network side can perform user scheduling more flexibly, choosing to serve the UE using either TRP 1 / 2 / 3 or TRP 1 / 2.

[0157] In another implementation, taking the first signaling including CSI reporting configuration signaling and DCI as an example, the CSI reporting configuration signaling indicates the two CSI-RS resource combinations mentioned above, and the DCI can be used at different times to instruct the UE to use one CSI-RS resource combination to determine the CSI. For example, when sending the CSI reporting configuration signaling, the UE is instructed to determine the CSI to be reported for CSI-RS resources {1,2,3}. At a later time, if the network side needs TRP 3 to serve other UEs, the DCI is used to instruct the UE to determine the CSI to be reported for CSI-RS resources {1,2}.

[0158] In some implementations, the network side can determine a set of CSI-RS resource combinations based on the CSI reported by the UE at a first moment, and indicate at least one CSI-RS resource combination via signaling at a second moment. For example, the network side determines a set of CSI-RS resource combinations based on the second CSI reported by the UE at a first moment, and indicates at least one CSI-RS resource combination via first signaling at a second moment.

[0159] For example, if there are 4 TRP cooperative service UEs on the network side, and the network side configures 4 CSI-RS resources at the first moment, in the existing Release 18 reporting scheme, the UE can select some CSI-RS resources for CSI reporting. The reported content indicates the index (or identifier) ​​of the CSI-RS resource. Taking the UE selecting CSI-RS resource {1,2,3} as an example, the resource combination set determined by the network side can be: CSI-RS resources {{1},{2},{3},{1,2},{1,3},{2,3},{1,2,3}}.

[0160] The network and the UE agree on how to generate this resource combination set. Subsequently, the network can use the first signaling such as DCI to indicate some CSI-RS resource combinations in the above set. For example, if the network believes that TRP 3 needs to serve other UEs in a later time, it can use DCI to indicate the fourth CSI-RS resource combination in the above set, i.e., CSI-RS resource {1,2}, and request the UE to report CSI for this resource combination.

[0161] When a UE reports CSI, in order to reduce feedback overhead, when the signaling instructs the UE to report CSI for multiple CSI-RS resource combinations, the network side and the UE may agree or instruct through signaling that the reported CSI must meet at least one of the following conditions: the number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource is the same, and the number of frequency basis vectors of the PMI corresponding to the same CSI-RS resource is also the same.

[0162] In some implementations, the CSI reported for CSI-RS resource combination 1 and combination 2 includes PMI, satisfying at least one of the following relationships:

[0163] 1) The spatial basis vectors of the PMI corresponding to the same CSI-RS resource are the same;

[0164] 2) The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource are the same;

[0165] 3) The spatial and frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource are the same;

[0166] For example, in the CSI-RS resource combination set indicated by the second signaling (e.g., CSI reporting configuration signaling), combination 1 and combination 2 have the same CSI-RS resources. When the first signaling (e.g., DCI) is used to indicate CSI reporting for combination 1 and combination 2 at different times, the spatial and / or frequency domain basis vectors corresponding to the CSI-RS resources only need to be fed back in one CSI reporting content, for example, in the first CSI reporting content.

[0167] For example, when a UE reports CSI corresponding to multiple CSI-RS combinations at a certain moment, the spatial and / or frequency domain basis vectors of the same CSI-RS resource only need to be fed back once, instead of reporting them separately for each combination containing the CSI-RS resource.

[0168] For example, at the first moment, the network side determines the resource combination set based on the UE feedback. Since the CSI-RS resource combinations indicated by the network side in the subsequent moments are all subsets of the resource combination set determined at the first moment, and the UE has already fed back the space frequency and / or frequency domain basis vectors for all CSI-RS resources at the first moment, the subsequent reporting process does not need to feed back the indication information of the space frequency and / or frequency domain basis vectors.

[0169] The above discussion assumes that the restrictions are activated. In some cases, the restrictions can also be deactivated. Whether to enable or disable restrictions can be indicated by signaling.

[0170] Assuming CSI-RS resource combination 1 is CSI-RS resource {1,2} and CSI-RS resource combination 2 is CSI-RS resource {1,2,3}, the L-th level PMI reported for these two combinations can be represented as follows: The PMI vector corresponding to the c-th CSI-RS resource can be equivalently represented as:

[0171]

[0172] The meanings of the parameters in the above formula are as follows:

[0173] W c,l For N t,c A matrix of dimensions N × N3, N t,c N is the number of ports contained in the c-th CSI-RS resource, and N3 is the number of frequency domain units;

[0174] α l These are the normalization coefficients;

[0175] L c This represents the number of PMI spatial basis vectors corresponding to the c-th CSI-RS resource, and the value is the same for both combinations; M is the number of PMI frequency domain basis vectors corresponding to all CSI-RS resources, and the value is the same for both combinations.

[0176] v i Represents spatial basis vectors, p represents the frequency domain basis vector. l,i,f and q l,i,f These are the combination coefficients of the spatial frequency basis vectors in the two polarization directions.

[0177] Due to the aforementioned limitations, only the spatial and / or frequency basis vectors corresponding to CSI-RS resources {1,2,3} need to be fed back once. The CSIs corresponding to the two combinations share the indication information of the spatial-frequency basis vectors, and only the combination coefficients p need to be fed back separately. l,i,f and q l,i,f This reduces feedback overhead.

[0178] Implementation Method 3

[0179] Regarding issue 2 above, the network side can indicate the same-site or cross-site relationship of TRP through CSI-RS resource combination. In order to reflect the cross-site impact and enable the UE to more accurately evaluate cross-site performance, the network side should indicate the deviation information corresponding to different CSI-RS resources through signaling, or indicate the relative deviation information corresponding to different CSI-RS resources.

[0180] The deviation information includes at least one of the following: frequency deviation information and phase deviation information.

[0181] Frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range;

[0182] Phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

[0183] For example, suppose TRP 1 / 2 belongs to the same site with a relative frequency deviation of 0; TRP 3 / 4 belongs to another site with a relative frequency deviation of 0. All four TRPs can provide good coverage for the target UE. However, there is a certain frequency and / or phase deviation between TRP 1 / 2 and TRP 3 / 4. In this case, the network side can configure CSI-RS resource combinations {1,2},{3,4},{1,2,3,4}, allowing the UE to report the CSI of each combination. This allows the network side to decide whether to cooperate with the UE across sites or which site to use to serve the UE.

[0184] To assess the impact of cross-site cooperation, the UE should calculate the CQI based on the frequency and / or phase offset information indicated by the network side when determining whether to report CSI. Furthermore, when calculating the CQI, the UE should assume that the precoding vector used by the network side for Layer 1 data is in one of the following three forms:

[0185] Where φ g The value is determined based on the phase deviation information indicated by the network side, g = 1, 2...G, where G is the number of CSI-RS resources included in the CSI-RS resource combination;

[0186] in θ g The value is determined based on the frequency deviation information indicated by the network side, g = 1, 2...G, where G is the number of CSI-RS resources included in the CSI-RS resource combination, and N3 is the number of frequency domain units;

[0187] Where φ g and θ gThe values ​​are determined based on the phase and frequency deviation information indicated by the network side, g = 1, 2...G, where G is the number of CSI-RS resources included in the CSI-RS resource combination, and N3 is the number of frequency domain units.

[0188] In the form described, For the σth layer of layer l g PMI corresponding to each CSI-RS resource, σ g This represents the index (identifier) ​​of the g-th CSI-RS resource in the resource combination. The UE can use this precoding method to assess the impact of cross-site synchronization errors on performance. Based on the precoding assumptions, the SINR of each layer's data can be obtained, which is further converted into the reported CQI. After receiving the reported CSI, the network side can more accurately assess whether cross-site cooperation should be adopted.

[0189] Figure 4 This is a schematic diagram of a communication device provided in one embodiment. The device is applied to a first communication node, such as... Figure 4 As shown, the device includes a first signaling receiving module 310 and a first CSI reporting module 320.

[0190] The first signaling receiving module 310 is used to receive a first signaling, which is used to instruct the first communication node to report CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources.

[0191] The first CSI reporting module 320 is used to report the first CSI according to the first signaling.

[0192] The communication device provided in this application embodiment includes a first communication node receiving a first signaling, which instructs the first communication node to report CSI for at least one CSI-RS resource combination. The first communication node reports a first CSI according to the first signaling. By instructing the first communication node to report CSI for CSI-RS resource combinations through the first signaling, the first communication node determines at least one CSI-RS resource combination that needs to be reported based on the instruction of the first signaling, and then reports the first CSI, thus solving the problem of inconsistency between the actual required CSI and the fed-in CSI. A second communication node can instruct the first communication node to report which CSI-RS resource combinations according to needs through the first signaling, thereby improving the accuracy of CSI reporting and avoiding resource waste caused by mismatched reported information.

[0193] In some embodiments, the device further includes:

[0194] The second signaling receiving module is used to receive second signaling, which is used to determine a CSI-RS resource combination set, wherein the CSI-RS resource combination set includes CSI-RS resource combinations.

[0195] In some embodiments, the device further includes:

[0196] The second CSI reporting module is used to report the second CSI.

[0197] In some embodiments, the second signaling is associated with a CSI-RS resource set; and / or, the second signaling indicates a CSI-RS resource combination set.

[0198] In some embodiments, the first signaling and the second signaling are contained in the same signaling, or the first signaling and the second signaling are contained in different signaling.

[0199] In some embodiments, the first signaling includes at least one of the following:

[0200] Media intervention control layer control elements, downlink control information, CSI reported configuration signaling.

[0201] In some embodiments, the second signaling includes CSI reporting configuration signaling.

[0202] In some embodiments, reporting the first CSI according to the first signaling includes at least one of the following:

[0203] CSI reporting is performed for each CSI-RS resource combination indicated by the first signaling;

[0204] Select at least one CSI-RS resource combination from the CSI-RS resource combination indicated by the first signaling to report CSI.

[0205] In some embodiments, the first CSI includes at least one of the following: CSI-RS resource indicator, rank indicator, precoding indicator PMI, and channel quality indicator.

[0206] In some embodiments, the CSI-RS resource portfolio includes at least one CSI-RS resource, and the first reported CSI includes PMI;

[0207] The PMI satisfies at least one of the following:

[0208] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0209] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0210] The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same;

[0211] The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0212] In some embodiments, the reported first CSI and second CSI include PMI, wherein the PMI satisfies at least one of the following:

[0213] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0214] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0215] The spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same;

[0216] The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0217] In some embodiments, the device further includes:

[0218] The deviation information receiving module is used to receive deviation information corresponding to CSI-RS resources;

[0219] The channel quality calculation module is used to calculate the channel quality indication based on the deviation information.

[0220] In some embodiments, the deviation information includes at least one of the following:

[0221] Frequency deviation information;

[0222] Phase deviation information.

[0223] In some embodiments, the frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range;

[0224] In some embodiments, the phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

[0225] In some embodiments, calculating the channel quality indication based on the deviation information includes:

[0226] The precoding vector is determined based on the deviation information and the feedback PMI;

[0227] The channel quality indicator is calculated based on the precoding vector.

[0228] In some embodiments, the precoded vectors used for the layer l data include at least one of the following:

[0229]

[0230] Where, φ g The value of Wσ is determined based on the phase deviation information in the deviation information. g,l For the σth layer of layer l g PMI corresponding to each CSI-RS resource, σ g Let g be the identifier of the g-th CSI-RS resource in the CSI-RS resource portfolio, where g = 1, 2, ..., G, and G is the number of CSI-RS resources included in the CSI-RS resource portfolio. θ g The value of N is determined based on the frequency deviation information in the deviation information, and N3 is the number of frequency domain units.

[0231] The communication device proposed in this embodiment belongs to the same inventive concept as the communication method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same beneficial effects as the communication method.

[0232] Figure 5 This is a schematic diagram of another communication device provided in one embodiment, which is applied to a second communication node, such as... Figure 5 As shown, the device includes a first signaling transmission module 410 and a first CSI receiving module 420.

[0233] The first signaling sending module 410 is used to send a first signaling, which instructs the first communication node to report CSI for at least one CSI-RS resource combination.

[0234] The first CSI receiving module 420 is used to receive the first CSI, which is reported according to the first signaling.

[0235] In some embodiments, the first CSI reports according to the first signaling.

[0236] The communication device provided in this application embodiment includes a second communication node sending a first signaling instruction to the first communication node to report CSI for at least one CSI-RS resource combination. The second communication node receives the first CSI reported according to the first signaling instruction. By instructing the first communication node to report CSI for CSI-RS resource combinations through the first signaling instruction, the first communication node can determine the at least one CSI-RS resource combination that needs to be reported based on the instruction of the first signaling instruction, and then report the first CSI. This solves the problem of inconsistency between the actual required CSI and the fed-in CSI. The second communication node can instruct the first communication node to report which CSI-RS resource combinations according to needs through the first signaling instruction, thereby improving the accuracy of CSI reporting and avoiding resource waste caused by mismatched reported information.

[0237] In some embodiments, the device further includes:

[0238] The second signaling transmission module is used to transmit a second signaling, which is used to determine a set of Channel State Information Reference Signal (CSI-RS) resource combinations, wherein the set of CSI-RS resource combinations includes CSI-RS resource combinations.

[0239] In some embodiments, the device further includes:

[0240] The second CSI receiving module is used to receive the second CSI.

[0241] The first signaling generation module is used to generate the first signaling based on the second CSI.

[0242] In some embodiments, the second signaling is associated with a CSI-RS resource set; and / or, the second signaling indicates a CSI-RS resource combination set.

[0243] In some embodiments, the first signaling and the second signaling are contained in the same signaling, or the first signaling and the second signaling are contained in different signaling.

[0244] In some embodiments, the first signaling includes at least one of the following: a media access control layer control element, downlink control information, and CSI reporting configuration signaling.

[0245] In some embodiments, the second signaling includes CSI reporting configuration signaling.

[0246] In some embodiments, receiving the first CSI includes at least one of the following:

[0247] Receive CSIs reported according to each CSI-RS resource combination indicated by the first signaling;

[0248] Receive CSIs reported from at least one CSI-RS resource combination selected from the CSI-RS resource combination indicated by the first signaling.

[0249] In some embodiments, the first CSI includes at least one of the following: CSI-RS resource indicator, rank indicator, precoding indicator PMI, and channel quality indicator.

[0250] In some embodiments, the second CSI includes at least one of the following: CSI-RS resource indicator, rank indicator, precoding indicator PMI, and channel quality indicator.

[0251] In some embodiments, the CSI-RS resource portfolio includes at least one CSI-RS resource, and the first reported CSI includes PMI;

[0252] The PMI satisfies at least one of the following:

[0253] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0254] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same;

[0255] The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same;

[0256] The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

[0257] In some embodiments, the reported first CSI and second CSI include PMI, wherein the PMI satisfies at least one of the following:

[0258] The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0259] The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same;

[0260] The spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same;

[0261] The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

[0262] In some embodiments, the device further includes:

[0263] The deviation information sending module is used to send deviation information corresponding to CSI-RS resources.

[0264] In some embodiments, the deviation information includes at least one of the following:

[0265] Frequency deviation information;

[0266] Phase deviation information.

[0267] In some embodiments, the frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range;

[0268] In some embodiments, the phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

[0269] The communication device proposed in this embodiment belongs to the same inventive concept as the communication method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same beneficial effects as the communication method.

[0270] This application also provides a communication node. Figure 6 A schematic diagram of the structure of a communication node is provided as an embodiment, such as... Figure 6 As shown, the communication node provided in this application includes a processor 510, a memory 520, and a computer program stored in the memory and executable on the processor. When the processor 510 executes the program, it implements the above-described communication method.

[0271] The communication node may also include a memory 520; the processor 510 in the communication node may be one or more. Figure 5 Taking a processor 510 as an example; memory 520 is used to store one or more programs; the one or more programs are executed by the one or more processors 510, so that the one or more processors 510 implement the communication method as described in the embodiments of this application.

[0272] The communication node also includes: a communication module 530, an input device 540, and an output device 550.

[0273] The processor 510, memory 520, communication module 530, input device 540, and output device 550 in the communication node can be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0274] Input device 540 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the communication node. Output device 550 may include display devices such as a display screen.

[0275] The communication module 530 may include a receiver and a transmitter. The communication module 530 is configured to perform information transmission and reception communication under the control of the processor 510.

[0276] The memory 520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the communication method described in the embodiments of this application (e.g., the first signaling receiving module 310 and the first CSI reporting module 320 in the communication device, or the first signaling sending module 410 and the first CSI receiving module 420 in the communication device). The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created according to the use of the communication node, etc. In addition, the memory 520 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 520 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the communication node via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0277] This application also provides a storage medium storing a computer program, which, when executed by a processor, implements any of the communication methods described in this application.

[0278] Optionally, the communication method, applied to a first communication node, includes: receiving a first signaling, the first signaling being used to instruct the first communication node to report a CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources; and reporting a first CSI according to the first signaling.

[0279] Optionally, the communication method, applied to a second communication node, includes: sending a first signaling message, the first signaling message being used to instruct the first communication node to report a CSI for at least one CSI-RS resource combination; and receiving a first CSI, the first CSI being reported according to the first signaling message.

[0280] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable CD-ROM, optical storage device, magnetic storage device, or any suitable combination thereof. The computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0281] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0282] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0283] This application provides a computer program product, which includes a computer program that, when executed by a processor, implements the communication method described in any one of the embodiments of this application.

[0284] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0285] The above description is merely an exemplary embodiment of this application and is not intended to limit the scope of protection of this application.

[0286] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicle-mounted mobile stations.

[0287] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0288] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0289] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on memory. Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD), etc.). Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

[0290] A detailed description of exemplary embodiments of this application has been provided above through exemplary and non-limiting examples. However, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and claims, without departing from the scope of this application. Therefore, the proper scope of this application will be determined by the claims.

Claims

1. A communication method characterized by comprising: Applied to the first communication node, including: Receive a first signaling, the first signaling being used to instruct the first communication node to report CSI for at least one combination of Channel State Information Reference Signals (CSI-RS) resources; The first CSI is reported according to the first signaling.

2. The communication method according to claim 1, characterized by, Also includes: Receive a second signaling message, the second signaling message being used to determine a set of CSI-RS resource combinations, the set of CSI-RS resource combinations including CSI-RS resource combinations.

3. The communication method according to claim 1, wherein, Before receiving the first signaling, the following is also included: Report to the second CSI.

4. The communication method according to claim 2, characterized in that, The second signaling association is a CSI-RS resource set; and / or, The second signaling indicates the CSI-RS resource combination set.

5. The communication method according to claim 2, characterized in that, The first signaling and the second signaling are contained in the same signaling, or the first signaling and the second signaling are contained in different signaling.

6. The communication method of claim 1, wherein, The first signaling includes at least one of the following: Media intervention control layer control elements, downlink control information, CSI reported configuration signaling.

7. The communication method according to claim 2, wherein The second signaling includes CSI reporting configuration signaling.

8. The communication method of claim 1, wherein, The step of reporting the first CSI according to the first signaling includes at least one of the following: CSI reporting is performed for each CSI-RS resource combination indicated by the first signaling; Select at least one CSI-RS resource combination from the CSI-RS resource combination indicated by the first signaling to report CSI.

9. The communication method of claim 1, wherein, The first CSI includes at least one of the following: CSI-RS Resource Indicator, Rank Indicator, Precoding Indicator (PMI), Channel Quality Indicator.

10. The communication method according to claim 1, wherein, The CSI-RS resource portfolio includes at least one CSI-RS resource, and the first CSI reported includes PMI; The PMI satisfies at least one of the following: The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same; The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

11. The communication method according to claim 3, wherein The first and second CSIs reported include PMI, and the PMI satisfies at least one of the following: The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; The spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same; The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

12. The communication method according to any one of claims 1-11, characterized by, Also includes: Receive deviation information corresponding to CSI-RS resources; The channel quality indicator is calculated based on the deviation information.

13. The communication method according to claim 12, wherein, The deviation information includes at least one of the following: Frequency deviation information; Phase deviation information.

14. The communication method according to claim 13, characterized in that, The frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range; The phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

15. The communication method according to claim 12, wherein, The step of calculating the channel quality indication based on the deviation information includes: The precoding vector is determined based on the deviation information and the feedback PMI; The channel quality indicator is calculated based on the precoding vector.

16. The communication method according to claim 15, wherein, The precoding vectors used for the data in layer l include at least one of the following forms: Where, φ g The value is determined based on the phase deviation information in the deviation information. For the σth layer of layer l g PMI corresponding to each CSI-RS resource, σ g Let g be the identifier of the g-th CSI-RS resource in the CSI-RS resource portfolio, where g = 1, 2, ..., G, and G is the number of CSI-RS resources included in the CSI-RS resource portfolio. θ g The value of N is determined based on the frequency deviation information in the deviation information, where N3 is the number of frequency domain units.

17. A communication method, characterized in that, Applied to the second communication node, including: Send a first signaling message, the first signaling message being used to instruct the first communication node to report CSI for at least one CSI-RS resource combination; The first CSI is received, and the first CSI reports according to the first signaling.

18. The communication method according to claim 17, characterized in that, Also includes: Send a second signaling message, which is used to determine a set of Channel State Information Reference Signal (CSI-RS) resource combinations, wherein the set of CSI-RS resource combinations includes CSI-RS resource combinations.

19. The communication method according to claim 17, characterized in that, Before sending the first signaling, the following is also included: Receive second CSI; The first signaling is generated based on the second CSI.

20. The communication method according to claim 18, characterized in that, The second signaling association is a CSI-RS resource set; and / or, The second signaling indicates the CSI-RS resource combination set.

21. The communication method according to claim 17, characterized in that, The receipt of the first CSI includes at least one of the following: Receive CSIs reported according to each CSI-RS resource combination indicated by the first signaling; Receive CSIs reported from at least one CSI-RS resource combination selected from the CSI-RS resource combination indicated by the first signaling.

22. The communication method according to claim 17, characterized in that, The CSI-RS resource portfolio includes at least one CSI-RS resource, and the first CSI reported includes PMI; The PMI satisfies at least one of the following: The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations is the same; The spatial basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same; The frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource in different CSI-RS resource combinations are the same.

23. The communication method according to claim 19, characterized in that, The first and second CSIs reported include PMI, and the PMI satisfies at least one of the following: The number of spatial basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; The number of frequency domain basis vectors of the PMI corresponding to the same CSI-RS resource reported by the first CSI and the second CSI is the same; The spatial basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same; The frequency domain basis vectors of the PMIs corresponding to the same CSI-RS resource reported by the first CSI and the second CSI are the same.

24. The communication method according to any one of claims 17-23, characterized in that, Also includes: Send the deviation information corresponding to the CSI-RS resource.

25. The communication method according to claim 24, characterized in that, The deviation information includes at least one of the following: Frequency deviation information; Phase deviation information.

26. The communication method according to claim 25, characterized in that, The frequency deviation information includes at least one of the following: frequency deviation, frequency range, relative frequency deviation, and relative frequency range; The phase deviation information includes at least one of the following: phase deviation, phase range, relative phase deviation, and relative phase range.

27. A communication node, characterized in that, include: The program includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for implementing communication between the processor and the memory, wherein the program, when executed by the processor, implements the steps of the communication method as described in any one of claims 1-26.

28. A storage medium for computer-readable storage, characterized in that, The storage medium stores one or more programs, which can be executed by one or more processors to implement the steps of the communication method according to any one of claims 1-26.

29. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the communication method according to any one of claims 1-26.

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