Channel state information reporting method and wireless communication device

Abstract

Provided in the present disclosure is a channel state information (CSI) reporting method. The method comprises: a terminal receiving configuration information sent by a base station, wherein the configuration information includes configuration information of a plurality of CSI-RS resources and configuration information for CSI reporting; and the terminal jointly reporting a plurality of pieces of CSI on the basis of the configuration information, wherein the plurality of pieces of CSI corresponding to the plurality of CSI-RS resources are determined on the basis of the same group of codebook parameter combinations. Since the total number of antenna ports corresponding to the plurality of CSI-RS resources is greater than a predefined threshold value, and when the base station is configured with antenna array radio frequency channels of which the number is greater than the predefined threshold value, Type-I and Type-II codebooks used for terminal communication can support a larger antenna port, so as to expand the coverage range and increase the throughput.

Description

A method for reporting channel state information and a wireless communication device Technical Field

[0001] The present disclosure relates to the field of wireless communications, and in particular, to a method for reporting channel state information and a wireless communication device. Background Art

[0002] With the continuous development of some emerging applications, the demand for communication capacity has become increasingly large, and MIMO technology is one of the key technologies to improve network capacity. In order to meet the increasing network requirements, MIMO technology tends to adopt larger-scale antenna arrays. Currently, the mainstream market antenna arrays in the 5G mid-frequency band are gradually expanding, and more transceiver RF channels can provide more vertical degrees of freedom in space and greater antenna gain. However, in the application scenario of larger antenna arrays, the maximum number of 32 antenna ports supported by a single CSI-RS resource in the prior art cannot meet the requirements. Therefore, a method for reporting channel state information and a wireless communication device for more antenna ports are needed to improve the problems in the prior art and other problems.

[0003] Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for reporting channel state information aiming at the above-mentioned defects in the prior art to solve the problems existing in the prior art.

[0005] According to one aspect of the present disclosure, a method for reporting channel state information is provided, which is executed on a terminal, and the method includes:

[0006] Receiving configuration information sent by a base station, where the configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information CSI reporting, and the total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold;

[0007] Based on the configuration information, jointly reporting the multiple CSIs; where the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; the same layer of each CSI corresponds to the same spatial domain basis or antenna port.

[0008] According to one aspect of the present disclosure, a method for reporting channel state information is provided, which is executed on a terminal, and the method includes:

[0009] Receiving configuration information sent by a base station, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported;

[0010] Report multiple CSIs corresponding to the selected multiple CSI-RS resources based on the configuration information, where the reporting amount corresponding to the CSI includes a channel state information reference signal resource indicator (CRI), and the multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resource, rank information of the CSI corresponding to the CSI-RS resource, and reporting overhead information of the CSI corresponding to the CSI-RS resource.

[0011] According to one aspect of the present disclosure, a method for reporting channel state information is provided, which is executed in a base station. The method includes: <000…​​​​​​​​​​​​​​​​​​​Advantages of the present invention: The disclosed terminal receives configuration information sent by a base station. The configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information (CSI) reporting. Based on the configuration information, the terminal jointly reports multiple CSIs. The multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations. Since the total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold, when the number of radio frequency channels of the base station's antenna array is greater than the predefined threshold, the base station and the terminal can support codebook-based data transmission with the total number of antenna ports across multiple CSI-RS resources being greater than the predefined threshold, so as to expand the coverage range and improve the throughput. Description of the Drawings

[0019] To more clearly illustrate the embodiments of the present disclosure or related technologies, the following drawings will be briefly introduced in the embodiments. Obviously, the drawings are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0020] FIG. 1 illustrates a schematic diagram of the wireless communication system architecture provided by the present disclosure.

[0021] FIG. 2 illustrates a schematic diagram of the reporting process of CSI provided by the present disclosure.

[0022] FIG. 3a illustrates a flowchart of the method for channel state information reporting provided by the present disclosure.

[0023] FIG. 3b illustrates a flowchart of the method for channel state information reporting provided by the present disclosure.

[0024] FIG. 4a illustrates a flowchart of the method for channel state information reporting provided by the present disclosure.

[0025] FIG. 4b illustrates a flowchart of the method for channel state information reporting provided by the present disclosure.

[0026] FIG. 5 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0027] FIG. 6 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0028] FIG. 7 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0029] FIG. 8 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0030] FIG. 9 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0031] FIG. 10 illustrates a schematic diagram of the antenna port distribution provided by the present disclosure.

[0032] FIG. 11 illustrates a schematic diagram of antenna port distribution provided by the present disclosure.

[0033] FIG. 12 illustrates a schematic diagram of antenna port distribution provided by the present disclosure.

[0034] FIG. 13 illustrates a schematic diagram of antenna port distribution provided by the present disclosure.

[0035] FIG. 14 illustrates a schematic diagram of antenna port distribution provided by the present disclosure.

[0036] FIG. 15 illustrates an exemplary block diagram for a wireless communication system provided by the present disclosure. DETAILED DESCRIPTION

[0037] Embodiments of the present disclosure have described technical matters, structural features, achieved objectives and effects in detail with reference to the accompanying drawings, as described below. Specifically, the terms in the embodiments of the present disclosure are only used for the purpose of describing specific embodiments and do not limit the present disclosure.

[0038] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B".

[0039] In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0040] The slash ( / ) or comma used in the present disclosure may mean "and / or". For example, "A / B" may mean "A and / or B". Therefore, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B or C".

[0041] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". Additionally, in the present disclosure, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0042] Furthermore, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". Additionally, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B, and C".

[0043] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, "a plurality of" means two or more unless specifically defined otherwise.

[0044] Those skilled in the art will recognize and understand that the details of the described examples are illustrative of only some embodiments, and the teachings set forth herein are applicable to a variety of alternative arrangements.

[0045] The technical solutions of this disclosure can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, 5G communication systems or future wireless communication systems, etc.

[0046] Exemplarily, the wireless communication system 100 to which this disclosure is applied is shown in FIG. 1. The wireless communication system 100 may include a base station 110, and the base station 110 may be a device that communicates with a user equipment 120 (UE). The base station 110 can provide communication coverage for a specific geographical area and can communicate with user equipment located within that coverage area. Optionally, the base station 110 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or the base station may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network or a base station in a future communication system, etc.

[0047] The wireless communication system 100 further includes at least one user equipment 120 within the coverage area of the base station 110. As used herein, "user equipment" includes, but is not limited to, being connected via wired lines, such as via the Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as, for a cellular network, Wireless Local Area Network (WLAN), digital television network such as a DVB-H network, satellite network, AM-FM broadcast transmitter; and / or a device configured to receive / transmit communication signals for another user equipment; and / or an Internet of Things (IoT) device. A user equipment configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radiotelephone with data processing, facsimile, and data communication capabilities; PDAs that may include a radiotelephone, pager, Internet / intranet access, Web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palmtop receivers or other electronic devices including radiotelephone transceivers. User equipment may refer to an access terminal, user unit, user station, mobile station, mobile unit, remote station, remote user equipment, mobile device, wireless communication device, or user agent. An access terminal may be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device, or other processing devices connected to a wireless modem, in-vehicle device, wearable device, user equipment in a 5G network, or user equipment in a future evolved PLMN, etc.

[0048] Optionally, Device to Device (D2D) communication may be performed between user equipments 120.

[0049] Optionally, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0050] The wireless communication system 100 further includes a core network 130. The core network 130 may be an IP mobile communication network operated by a mobile communication operator. For example, the core network 130 may be the core network used by a mobile communication operator for operating and managing the wireless communication system 100, or may also be the core network used by a virtual mobile communication operator such as an MVNO (Mobile Virtual Network Operator).

[0051] The core network 130 may be connected to the base station 110 and serve as a relay device for transmitting user data. The user equipment 120 communicates user data via the core network 130. It should be noted that the communication of user data is not limited to IP communication and may also be non-IP communication.

[0052] FIG. 1 exemplarily shows one base station 110, two user equipments 120, and a core network 130. Optionally, the wireless communication system 100 may include multiple base stations, and the coverage range of each base station may include other numbers of user equipments. The present disclosure does not limit this.

[0053] Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and network elements. The present disclosure does not limit this. For example, the core network 130 may include other network entities such as a network controller, a mobility management entity, and network elements. The present disclosure does not limit this.

[0054] It should be understood that in the present disclosure, a device with wireless communication function in a network / system may be referred to as a wireless communication device. Taking the wireless communication system 100 shown in FIG. 1 as an example, the wireless communication device may include the base station 110, the user equipment 120, and the core network 130 with communication functions. The base station 110 and the user equipment 120 may be the specific devices described above and will not be elaborated here; the wireless communication device may also include other devices (the core network 130) in the wireless communication system 100. For example, the core network 130 may include other network entities such as a network controller and a mobility management entity. The present disclosure does not limit this.

[0055] For ease of understanding the technical solutions of the present disclosure, the following describes the technical solutions related to the present disclosure. [[ID=第十九]] [[ID=第二十]]

[0056] [[ID=第二十一]]Before further describing the present disclosure in detail, the prior art is provided for better understanding of the present disclosure. [[ID=第二十二]] [[ID=第二十三]]

[0057] [[ID=第二十四]]1. The schematic diagram of the CSI reporting process is shown in FIG. 2: [[ID=第二十五]]

[0058] As can be seen from Figure 2, the measurement feedback of CSI mainly includes four steps:

[0059] Step1: Before transmitting the reference signal, the base station first transmits the configuration information of channel measurement;

[0060] Step2: The base station transmits the reference signal for downlink channel measurement, such as CSI-RS;

[0061] Step3: The terminal calculates the CSI based on the measurement reference signal transmitted by the base station and reports it to the base station;

[0062] Step4: The base station determines the precoding information for downlink data transmission based on the CSI reported by the terminal and performs downlink data transmission;

[0063] II. Rel 15 Type I codebook

[0064] The Type I codebook follows the codebook design principle of LTE and adopts a two-level codebook structure of W = W1W2. W1 is based on a block diagonal structure, and each diagonal block represents a beam group in a polarization direction. The antenna arrays in different polarization directions use the same beam group, that is, L DFT beams are selected from N1O1N2O2 beams, and L can be configured as 1 or 4. Among them, P is used to select the beam, the corresponding position of the selected beam is 1, and the rest of the elements are 0. φ is used to quantify the phase difference between the two polarization directions and adopts quantization, N P ∈ {1, 2, 3, 4}. The values of N1, N2, O1, and O2 are shown in Table 1:

[0065] Table 1: Configurations supported by (N1, N2) and (O1, O2)

[0066] Furthermore, for the Type I codebook, if the number of CSI-RS resources configured for channel measurement is greater than 1, it is necessary to report the CRI to distinguish the beam corresponding to the CSI-RS resource selected by the terminal. And when the CRI is included in the reportQuantity, if the number of CSI-RS resources in the CSI-RS resource set is greater than 2, the maximum number of ports corresponding to each CSI-RS resource is 8.

[0067] III. Rel 15 Type II codebook

[0068] The Type II codebook is a high-precision codebook, which is designed based on the beam combination principle. The 5G New Radio Type II codebook expands the number of orthogonal beams for combination, and beam combination is independently performed in different polarization directions. Both the flexibility and precision of the codebook are improved compared to Type I, but the feedback overhead also increases significantly. Therefore, it only supports transmission scenarios with Rank = 1 or 2 (the number of parallel data streams).

[0069] Type II is also a two-level codebook structure based on W = W1W2, and its spatial beam set is the same as that of Type I. W1 is based on a block diagonal structure, and each diagonal block represents a beam group in a polarization direction. The antenna arrays in different polarization directions use the same beam group, that is, L DFT beams are selected from N1O1N2O2 beams, where L ∈ {2, 3, 4}. W2 = P WB P SB C, where P WB represents the broadband amplitude quantization coefficient, P SB corresponds to the sub-band amplitude quantization coefficient, and C corresponds to the sub-band phase quantization coefficient. Since Type II generates the codebook by using orthogonal beam combination, the user equipment selects the beam orthogonal basis from the spatial beam set by measuring the channel information, that is, one group is selected from O1O2 groups of DFT beam orthogonal bases, and the same group of orthogonal bases is used for different layers and polarization directions.

[0070] IV. Enhanced Type II Codebook eType II codebook

[0071] The existing Rel 16 eTypeII codebook adopts a three-level codebook architecture where W1 ∈ C P×2L represents the spatial basis matrix, is the projection coefficient obtained by projecting the precoding matrix onto the spatial and frequency domain basis matrices, is the frequency domain basis matrix, P is the number of antenna ports, L represents the number of spatial basis vectors selected in a single polarization direction, M v represents the number of frequency domain basis vectors corresponding to the v-th layer, and N3 represents the number of PMI sub-bands. In the above codebook architecture, some or all of the dimension information of different matrices is indicated by the base station to the terminal, such as L, M v etc. The base station indicates the number of spatial-frequency domain bases and the control factor of the number of non-zero coefficients reported by the terminal in the form of a combination of codebook parameters, as shown in Table 2:

[0072] Table 2: Codebook parameter configuration for L, β and p v

[0073] Among them, ​R represents the number of PMI sub-bands included in the CQI sub-band; β is used to control the number of reported maximum non-zero coefficients. For example, the number of reported maximum non-zero coefficients by the terminal in the first layer can be expressed as Furthermore, the positions of the non-zero coefficients reported in W2 are indicated by a bitmap, and the length of the bitmap is 2LM v . In addition, for the Rel-16 eTypeII codebook, the selection of the spatial-frequency domain basis matrix is based on an orthogonal DFT vector set. For example, the spatial domain basis matrix W1 is a block diagonal matrix The dimension of w is w ∈ C P / 2×L , and the L column vectors of the matrix w are selected from the orthogonal DFT vector set with dimension P / 2; while for the W f matrix, the M v column vectors are selected from the orthogonal DFT vector set with dimension N3

[0074] V. Further enhanced type II port selection codebook FeType II port selection codebook

[0075] The existing Rel 17 FeTypeII codebook adopts a three-level codebook architecture Among them represents the spatial domain basis matrix, is the projection coefficient obtained by projecting the precoding matrix onto the spatial and frequency domain basis matrices, is the frequency domain basis matrix, P is the number of antenna ports, K1 = 2L, L represents the number of antenna ports selected in a single polarization direction, M represents the number of selected frequency domain basis vectors, and N3 represents the number of PMI sub-bands. In the above codebook architecture, the dimension information of different matrices is directly or indirectly indicated by the base station to the terminal. For example, M, K1, etc. The base station indicates the number of port selections, the number of frequency domain basis, and the control factor β of the number of non-zero coefficients reported by the terminal in the form of a codebook parameter combination, as shown in Table 3

[0076] Table 3: Codebook parameter configuration for α, M, and β

[0077] Among them, M = 1 or 2, β is used to control the number of reported maximum non-zero coefficients. For example, the number of reported maximum non-zero coefficients by the terminal in the first layer can be expressed as Furthermore, the positions of the non-zero coefficients reported in W2 are indicated by a bitmap, and the length of the bitmap is 2LM. In addition, for the Rel-17 FeTypeII codebook, the selection of the spatial-frequency domain basis matrix is based on an orthogonal DFT vector set. For example, the spatial domain basis matrix W1 is a block diagonal matrix The dimension of w is w ∈ CP / 2×L , and the L column vectors of matrix w are selected from the set of orthogonal DFT vectors with dimension P / 2; and W f The M v column vectors of the matrix are selected from the set of orthogonal DFT vectors with dimension N3.

[0078] VI. Enhanced type II codebook for precoding matrix indicator (PMI) used for prediction eType II codebook for predicted PMI

[0079] The eTypeII PMI prediction codebook adopts a three-level codebook architecture where W1 ∈ C P×2L represents the spatial domain basis matrix, is the projection coefficient obtained by projecting the precoding matrix onto the spatial and frequency domain basis matrices, is the frequency domain basis matrix, P is the number of antenna ports, L represents the number of spatial basis vectors selected for a single polarization direction, M v represents the number of frequency domain basis vectors corresponding to the v-th layer, and N3 represents the number of PMI subbands. In the above codebook architecture, the dimension information of different matrices is partially or fully indicated by the base station to the terminal, such as L, M v etc. The base station indicates the number of spatial and frequency domain bases and the control factor for the number of non-zero coefficients reported by the terminal in the form of a codebook parameter combination, as shown in Table 4:

[0080] Table 4: Codebook parameter configuration for L, β, and p v

[0081] Among them, R represents the number of PMI subbands included in the CQI subband; β is used to control the number of reported maximum non-zero coefficients. For example, the number of reported maximum non-zero coefficients by the terminal in the first layer can be expressed as Furthermore, the positions of the non-zero coefficients reported in W2 are indicated by a bitmap, and the length of the bitmap is 2LM v . In addition, for the Rel-16 eTypeII codebook, the selection of the spatial and frequency domain basis matrices is based on the set of orthogonal DFT vectors. For example, the spatial domain basis matrix W1 is a block diagonal matrix with dimension w ∈ C P / 2×L , and the L column vectors of matrix w are selected from the set of orthogonal DFT vectors with dimension P / 2; and W f The M v column vectors of the matrix are selected from the set of orthogonal DFT vectors with dimension N3.

[0082] ​For the eTypeII PMI prediction codebook, a parameter N4 is introduced. N4 represents the dimension of the time-domain channel, and N4 ∈ {1, 2, 4, 8}. The dimension after time-domain compression is Q.

[0083] VII. Enhanced Type II related joint transmission codebook eType II CJT codebook

[0084] The eTypeII PMI prediction codebook adopts a three-level codebook architecture where W1 ∈ C P×2L represents the spatial domain basis matrix, are the projection coefficients obtained by projecting the precoding matrix onto the spatial and frequency domain basis matrices, is the frequency domain basis matrix, P is the number of antenna ports, L represents the number of spatial basis vectors selected for a single polarization direction, M v represents the number of frequency domain basis vectors corresponding to the v-th layer, and N3 represents the number of PMI subbands. In the above codebook architecture, the dimension information of different matrices is partially or fully indicated by the base station to the terminal. For example, L, M v etc. The base station indicates the number of spatial and frequency domain bases of the terminal and the control factor of the number of non-zero coefficients reported by the terminal in the form of a codebook parameter combination, as shown in Table 5-7: [[ID=!~20]]

[0085] Table 5: Codebook parameter configuration for

[0086] Table 6: Codebook parameter configuration for {p v , β}

[0087] Table 7: Codebook parameter configuration for and {p υ , β}

[0088] Exemplary method

[0089] This embodiment provides a method for reporting channel state information, which can be applied to a terminal. Specifically, as shown in Figure 3a, the method includes:

[0090] Step S100, receiving the configuration information sent by the base station. Among them, the configuration information includes the configuration information of multiple CSI-RS resources and the configuration information for channel state information CSI reporting. The total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold;

[0091] Step S200: Jointly report multiple CSIs based on the configuration information; among them, multiple CSIs corresponding to multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; the same layer of each CSI corresponds to the same spatial domain basis or antenna port.

[0092] This embodiment provides a method for reporting channel state information, which can be applied to a base station. Specifically, as shown in Figure 3b, the method includes:

[0093] Step H100: Transmit configuration information, where the configuration information includes configuration information of multiple CSI-RS resources and configuration information for reporting channel state information (CSI), and the total number of antenna ports corresponding to multiple CSI-RS resources is greater than a predefined threshold;

[0094] Step H200: Receive multiple jointly reported CSIs, where multiple CSIs corresponding to multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; the same layer of each CSI corresponds to the same spatial domain basis or antenna port.

[0095] Specifically, the configuration information further includes codebook parameter combination information; the configuration information of CSI-RS resources is used to configure the reference signal for channel measurement, and the corresponding CSI can be obtained based on the measurement of this reference signal. Since the current NR TypeI and TypeII codebooks only support a maximum of the predefined threshold number of antenna ports (such as 32 antenna ports), it will cause problems of limited coverage and capacity. Therefore, in this disclosure, when the base station sends the configuration information of multiple CSI-RS resources for channel measurement to the terminal, the total number of antenna ports corresponding to multiple CSI-RS resources in the configuration information of multiple CSI-RS resources is greater than the predefined threshold. The terminal jointly reports multiple CSIs based on the configuration information for reporting channel state information (CSI), enabling the base station to support precoding with more than the predefined threshold number of antenna ports to send data information, thereby further improving the system capacity. In addition, when the terminal jointly reports multiple CSIs, multiple CSIs corresponding to multiple CSI-RS resources are determined based on the same set of codebook parameter combinations, and the same layer of each CSI corresponds to the same spatial domain basis or antenna port, which can reduce the reporting overhead of the terminal. For a detailed example of this part, see the following text.

[0096] In some embodiments, the configuration information further includes configuration information for channel state information (CSI) reporting. Before receiving multiple pieces of CSI jointly reported by a terminal, the base station also sends configuration information including CSI reporting and distributes channel measurement reference information (i.e., CSI-RS resources). In some embodiments, after receiving multiple pieces of CSI jointly reported by a terminal, the base station further includes sending downlink data after precoding. In some embodiments, the configuration information further includes codebook parameter combination information. In some embodiments, the predefined threshold is 32, and multiple CSI-RS resources are used for channel measurement.

[0097] When the base station sends multiple CSI-RS resources for channel measurement to support a codebook scheme with a maximum of 128 antenna ports or more than 32 antenna ports, there are configuration constraint problems for multiple CSI-RS resources. The large-scale MIMO system on the network side can already support antenna arrays with far more than 32 radio frequency channels. To better utilize the advantages of large-scale antenna arrays, a downlink codebook with more than 32 antenna ports needs to be designed for large-scale antenna arrays. Since a single CSI-RS resource supports a maximum of 32 antenna ports, multiple CSI-RS resources need to be configured simultaneously. To ensure the time-domain coherence of the channels of large-scale antenna arrays and simplify the configuration of CSI-RS resources, the configuration of multiple CSI-RS resources needs to be constrained.

[0098] In some embodiments, the method for channel state information reporting further includes constraining multiple CSI-RS resources located in the same CSI-RS resource set. The constraint further includes that multiple CSI-RS resources are of the same type (i.e., the same class of CSI-RS resources, such as all periodic / aperiodic / semi-persistent). The constraint further includes: the number of antenna ports corresponding to multiple CSI-RS resources is the same, and the distribution (N1, N2) of antenna ports corresponding to the number of antenna ports is the same. The constraint further includes: the number of antenna ports corresponding to multiple CSI-RS resources may not be the same, and the number of horizontal antenna ports and / or vertical antenna ports among the number of antenna ports corresponding to multiple CSI-RS resources is the same.

[0099] Constrain the representation of the channel state information CSI, and the acquisition of PMI in the CSI information is determined based on the same antenna port oversampling group (O1, O2). By constraining multiple CSI-RS resources for channel measurement located in the same CSI-RS resource set as described above, the time-domain coherence of the channels of the measured large-scale antenna array (i.e., an antenna array with a maximum of 128 antenna ports) can be ensured.

[0100] The following uses actual examples to elaborate in detail. For the high-layer parameter codebook type codebookType in the CSI-ReportConfig of the UE being 'typeII-r19', 'typeII-PortSelection-r19', 'etypeII-r19', 'etypeII-PortSelection-r19', or 'FetypeII-PortSelection-r19', the UE expects to configure K CSI-RS resources for channel measurement in the reference signal resource set, where K is greater than or equal to 1 and less than or equal to 4, or K is greater than 1 and less than or equal to 4, and each CSI-RS resource has a maximum of 32 antenna ports. Among them, 'typeII-r19', 'typeII-PortSelection-r19', 'etypeII-r19', 'etypeII-PortSelection-r19', 'FetypeII-PortSelection-r19' respectively indicate that the codebooks of the codebook types 'typeII', 'typeII-PortSelection', 'typeII-r16', 'typeII-PortSelection-r16', 'FetypeII-PortSelection-r16' support a maximum of 128 CSI-RS antenna ports across all CSI-RS resources, or support configuring multiple CSI-RS resources for channel measurement, and the sum of the antenna port numbers of multiple CSI-RS resources is greater than 32.

[0101] It should be noted that the above-mentioned multiple CSI-RS resources can also meet the constraint that they are of the same type of CSI-RS resources, such as being periodic / aperiodic / semi-persistent, and for the K aperiodic / semi-persistent CSI-RS resources, they are triggered by the same triggering instance; furthermore, the above-mentioned multiple CSI-RS resources can also meet the requirement that they are located in the same time slot or adjacent multiple time slots in the time domain; for example, for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or adjacent multiple time slots; or for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or adjacent two time slots or for K aperiodic CSI-RS resources, the maximum interval between two consecutive CSI-RS resources is 1 or 2 time slots; or for K aperiodic CSI-RS resources, the interval between different CSI-RS resources does not exceed 1 or 2 time slots; or for K aperiodic CSI-RS resources, they are located in the same time slot or adjacent multiple time slots. For the K semi-persistent or periodic CSI-RS resources, the multiple resources meet the same period, and the offsets within the period of the multiple CSI-RS resources are the same or located in adjacent multiple time slots; or the offsets within the period of the multiple CSI-RS resources are the same or the maximum interval is 1 or 2 time slots; or for multiple periodic or semi-persistent CSI-RS resources, the time domain positions occupied by the CSI-RS resources within the same period meet the same constraints as the above-mentioned multiple aperiodic CSI-RS resources.

[0102] In addition, the above-mentioned multiple CSI-RS resources can also meet the requirement that the number of antenna ports is the same, and the distribution (N1, N2) of the antenna ports can also be the same; finally, for the codebook mentioned above, during the codebook design process, when the multiple CSI-RS resources meet the requirement that the number of antenna ports is the same and the distribution of the antenna ports is the same, the oversampling groups (O1, O2) can also be the same.

[0103] In some other embodiments, when the reported quantity corresponding to the channel state information CSI includes CRI (i.e., the high-layer parameter reportQuantity in CSI-ReportConfig is set to 'cri-RSRP', 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-SINR', or 'cri-SINR-Index'), the constraints include: when the number of CSI-RS resources is 2, the number of antenna ports corresponding to each CSI-RS resource is at least 16. When the reported quantity corresponding to the channel state information CSI includes CRI, the constraints further include: when the number of CSI-RS resources is 3, the number of antenna ports corresponding to each CSI-RS resource is at least 12, and when the number of resources is greater than 3 and less than 8, the number of antenna ports corresponding to each CSI-RS resource is at least 8. The constraints further include: multiple CSI-RS resources are in the same time slot or two adjacent time slots in the time domain. The constraints further include: the number of antenna ports corresponding to multiple CSI-RS resources is the same, and the distribution of the antenna ports corresponding to the number of antenna ports is the same; the constraints further include: the number of antenna ports corresponding to multiple CSI-RS resources may not be the same, and the number of horizontal antenna ports and / or vertical antenna ports among the number of antenna ports corresponding to multiple CSI-RS resources is the same. The representation of the channel state information CSI is constrained, and the acquisition of PMI in the CSI information is determined based on the same antenna port oversampling group. By constraining multiple CSI-RS resources for channel measurement in the same CSI-RS resource set as described above, the time-domain coherence of the channel of a large-scale antenna array (i.e., an antenna array with a maximum of 128 antenna ports) obtained by measurement can be ensured.

[0104] The following will be elaborated in detail with practical examples. For the HBF architecture, in order to support CRI-based CSI reporting codebooks for up to 128 antenna ports across all CSI-RS resources, the existing CSI-RS resource configuration constraints need to be modified accordingly. For example, in addition to setting reportQuantity in CSI-ReportConfig to 'cri-RI-PMI-CQI' and codebookType to 'typeII-CJT-r18', 'typeII-CJT-PortSelection-r18', 'typeII-Doppler-r18', 'typeII-Doppler-PortSelection-r18', 'etypeII-CJT-r19', 'FetypeII-CJT-PortSelection-r19', 'etypeII-Doppler-r19' or 'typeII-Doppler-PortSelection-r19', if the higher-layer parameter reportQuantity in the CSI-ReportConfig configured by the UE is set to 'cri-RSRP', 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', 'cri-RI-LI-PMI-CQI', 'cri-SINR', or 'cri-SINR-Index', and K is configured in the corresponding channel measurement resource set s >1 CSI-RS resources. If the configured CSI-RS resource is K s = 2, then each resource has at least 16 CSI-RS antenna ports; if the configured CSI-RS resource is K s = 3, then each resource has at least 12 antenna ports; if the number of configured CSI-RS resources 3 < K s≤8, then each resource contains at least 8 CSI-RS antenna ports. 'etypeII-CJT-r19', 'FetypeII-CJT-PortSelection-r19', 'etypeII-Doppler-r19' or 'typeII-Doppler-PortSelection-r19' are further enhancements of the 'typeII-CJT-r18', 'typeII-CJT-PortSelection-r18', 'typeII-Doppler-r18', 'typeII-Doppler-PortSelection-r18' codebooks, where 'etypeII-CJT-r19' / 'FetypeII-CJT-PortSelection-r19' further supports the configuration of 1 ≤ K ≤ 16 CSI-RS resources, and the maximum number of antenna ports of the CSI-RS resources is 32; 'etypeII-Doppler-r19' / 'typeII-Doppler-PortSelection-r19' further supports the configuration of K ∈ {4, 8, 12, 16, 24, 32, 36, 48} non-periodic CSI-RS resources, or the configuration of 1 ≤ K ≤ 4 periodic CSI-RS resources with the same period, or the configuration of 1 ≤ K ≤ 4 semi-persistent CSI-RS resources.

[0105] It should be noted that the above-mentioned multiple CSI-RS resources can also meet the constraint that they are of the same type of CSI-RS resources, for example, all are periodic / aperiodic / semi-persistent, and the K aperiodic / semi-persistent CSI-RS resources are triggered by the same triggering instance; furthermore, the above-mentioned multiple CSI-RS resources can also meet the condition that they are located in the same time slot or two adjacent time slots in the time domain; for example, for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or multiple adjacent time slots, or for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or two adjacent time slots; or for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or multiple adjacent time slots; or for K aperiodic CSI-RS resources, the maximum interval between different CSI-RS resources does not exceed 1 or 2 time slots; or for K aperiodic CSI-RS resources, they are located in the same time slot or multiple adjacent time slots. For K semi-persistent or periodic CSI-RS resources, the multiple resources satisfy the same period, and the offsets within the period of the multiple CSI-RS resources are the same or located in multiple adjacent time slots; or the offsets within the period of the multiple CSI-RS resources are the same or the maximum interval is 1 or 2 time slots; or the time domain positions occupied by the CSI-RS resources within the same period of the multiple periodic or semi-persistent CSI-RS resources satisfy the same constraints as the above-mentioned multiple aperiodic CSI-RS resources.

[0106] In addition, the above-mentioned multiple CSI-RS resources can also satisfy the same number of antenna ports, and the distribution (N1, N2) of the antenna ports can also be the same; finally, for the codebook mentioned above, during the codebook design process, when the multiple CSI-RS resources satisfy the same number of antenna ports and the same distribution of the antenna ports, the oversampling groups (O1, O2) can also be the same.

[0107] In some other embodiments, the method for constraining multiple CSI-RS resources located in the same CSI-RS resource set can also be at least one of the following:

[0108] 1. When the high-layer parameters in the CSI-ReportConfig of a UE are configured with 'N4', the reportQuantity parameter value is 'cri-RI-PMI-CQI', and the associated codebook type is 'eTypeII-Doppler-r19' or 'FeTypeII-DopplerPortSelection-r19', it is expected to configure K ∈ {4, 8, 12, 16, 24, 32, 36, 48} aperiodic CSI-RS resources, or configure 1 ≤ K ≤ 4 CSI-RS resources with the same period, or configure 1 ≤ K ≤ 4 semi-persistent and CSI-RS resources with the same period. For the set of aperiodic CSI-RS resources used for channel measurement, K CSI-RS resources are triggered by the same trigger signal; among the K aperiodic CSI-RS resources, across multiple CSI-RS resources, the maximum supported CSI measurement with 128 CSI-RS antenna ports or multiple resources with more than 32 antenna ports can be regarded as a CSI-RS resource group, and multiple CSI-RS resources under the same resource group are located in the same or adjacent time slots; where 'etypeII-Doppler-r19' / 'typeII-Doppler-PortSelection-r19' is the 'typeII-Doppler-r18', 'typeII-Doppler-PortSelection-r18' codebook that further supports the configuration of K ∈ {4, 8, 12, 16, 24, 32, 36, 48} aperiodic CSI-RS resources, or configure 1 ≤ K ≤ 4 CSI-RS resources with the same period, or configure 1 ≤ K ≤ 4 semi-persistent CSI-RS resources, and the maximum number of antenna ports of the CSI-RS resources is 32; if multiple aperiodic CSI-RS resources are configured, the multiple aperiodic CSI-RS resources can be divided into N ∈ {4, 8, 12} resource groups, each resource group contains 1 ≤ M ≤ 4 CSI-RS resources, and the sum of the antenna ports of multiple CSI-RS resources under the resource group is greater than 32. Or multiple aperiodic CSI-RS resources can be divided into 1 ≤ N ≤ 4 resource groups, each resource group contains M ∈ {4, 8, 12} resources, one resource is taken from each resource group to form a resource pair, and the sum of the antenna ports of multiple CSI-RS resources under each resource pair is greater than 32. For periodic and semi-persistent CSI-RS resources, the sum of the antenna ports of multiple CSI-RS resources is greater than 32.

[0109] It should be noted that the above-mentioned multiple CSI-RS resources can also satisfy the constraint that they are of the same type of CSI-RS resources, such as being periodic / aperiodic / semi-persistent, and the K aperiodic / semi-persistent CSI-RS resources are triggered by the same triggering instance; furthermore, the above-mentioned multiple CSI-RS resources can also satisfy being located in the same time slot or two adjacent time slots in the time domain; for example, for aperiodic CSI-RS resources, two consecutive CSI-RS resources in the same resource group are located in the same time slot or multiple adjacent time slots; or for aperiodic CSI-RS resources, two consecutive CSI-RS resources in the same resource group are located in the same time slot or two adjacent time slots; or two consecutive CSI-RS resources in the same resource group are located in the same time slot or multiple adjacent time slots; or the interval between different CSI-RS resources in the same resource group does not exceed 1 or 2 time slots; or the CSI-RS resources in the same resource group are located in the same time slot or multiple adjacent time slots. For K semi-persistent or periodic CSI-RS resources, the multiple resources satisfy the same period, and the offsets within the period of the multiple CSI-RS resources are the same or located in multiple adjacent time slots; or the offsets within the period of the multiple CSI-RS resources are the same or the maximum interval is 1 or 2 time slots; or the time domain positions occupied by the CSI-RS resources within the same period of the multiple periodic or semi-persistent CSI-RS resources satisfy the same constraints as the above-mentioned multiple aperiodic CSI-RS resources.

[0110] In addition, the above-mentioned multiple CSI-RS resources can also satisfy the same number of antenna ports, and the distribution (N1, N2) of the antenna ports can also be the same; finally, for the codebook mentioned above, during the codebook design process, when the multiple CSI-RS resources satisfy the same number of antenna ports and the same distribution of antenna ports, the oversampling groups (O1, O2) can also be the same.

[0111] Second, when the codebook type configured by the high-layer parameter in the CSI-ReportConfig of a UE is 'etypeII-CJT-r19', 'FetypeII-CJT-PortSelection-r19', and the value of the reportQuantity parameter of the reported quantity is 'cri-RI-PMI-CQI', it is expected to configure 1 ≤ K ≤ 16 CSI-RS resources in the CSI-RS resource set for channel measurement, or configure 1 ≤ K ≤ 4 CSI-RS resources in 1 ≤ N ≤ 4 resource sets for channel measurement. When 1 ≤ K ≤ 16, the multiple CSI-RS resources in the CSI-RS resource set can be regarded as a resource group, each resource group contains 1 ≤ M ≤ 4 CSI-RS resources, and the maximum number of antenna ports of each CSI-RS resource is 32, and the sum of the number of antenna ports of the multiple CSI-RS resources under each resource group is greater than 32;

[0112] It should be noted that the above-mentioned multiple CSI-RS resources can also meet the constraint that they are the same type of CSI-RS resources, for example, all are periodic / aperiodic / semi-persistent, and the K aperiodic / semi-persistent CSI-RS resources are triggered by the same triggering instance; furthermore, the multiple CSI-RS resources under the same resource set or the multiple CSI-RS resources under the same resource group can also meet the condition that they are located in the same time slot or adjacent time slots in the time domain; for example, for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or adjacent time slots; or for K aperiodic CSI-RS resources, two consecutive CSI-RS resources are located in the same time slot or two adjacent time slots or for K aperiodic CSI-RS resources, the maximum interval between two consecutive CSI-RS resources is 1 or 2 time slots; or for K aperiodic CSI-RS resources, the interval between different CSI-RS resources does not exceed 1 or 2 time slots; or for K aperiodic CSI-RS resources, they are located in the same time slot or adjacent time slots. For K semi-persistent or periodic CSI-RS resources, the multiple resources satisfy the same period, and the offsets within the period of the multiple CSI-RS resources are the same or located in adjacent time slots; or the time domain positions occupied by the multiple periodic or semi-persistent CSI-RS resources within the same period satisfy the same constraints as the above-mentioned multiple aperiodic CSI-RS resources.

[0113] In addition, the above-mentioned multiple CSI-RS resources can also meet the condition that the number of antenna ports is the same, and the distribution (N1, N2) of the antenna ports can also be the same; the constraint also includes: the number of antenna ports corresponding to the multiple CSI-RS resources can be different, and the horizontal antenna port number and / or vertical antenna port number among the number of antenna ports corresponding to the multiple CSI-RS resources are the same. Finally, for the codebook mentioned above, during the codebook design process, when the multiple CSI-RS resources meet the conditions of the same number of antenna ports and the same distribution of antenna ports, the oversampling group (O1, O2) can also be the same.

[0114] In some embodiments, when the total number of antenna ports across multiple CSI-RS resources for channel measurement is greater than 32, the number of antenna ports supported by the codebook is at least one of the set of antenna port numbers; for example, the antenna port number P ∈ {36, 48, 64, 72, 96, 128}, and it satisfies that it is an integer multiple of the number of antenna ports P CSI-RS ∈ {4, 8, 12, 16, 24, 32}, and the maximum multiple is 4, that is, a maximum of 4 CSI-RS resources can be configured. The above number of antenna ports requires configuring multiple CSI-RS resources, and the configuration of the multiple CSI-RS resources satisfies at least one of the following configurations:

[0115] (1) The number of antenna ports corresponding to multiple CSI-RSs is the same, and the number of CSI-RS resources is the least. For example, for 64 antenna ports, 2 CSI-RS resources with 32 antenna ports can be configured. This configuration method is simple and relatively friendly to codebook design. When the terminal reports for different CSI-RS resources, the terminal reporting volume can be reduced;

[0116] (2) The number of antenna ports corresponding to multiple CSI-RSs is the same, and the number of CSI-RS resources is the most. For example, for 64 antenna ports, 4 CSI-RS resources with 16 antenna ports can be configured. This method has a relatively flexible antenna port arrangement, but the codebook design is relatively complex;

[0117] (3) The number of antenna ports corresponding to multiple CSI-RSs is the same. For example, for 64 antenna ports, 2 CSI-RS resources with 32 antenna ports can be configured, or 4 CSI-RS resources with 16 antenna ports can be configured;

[0118] In some other embodiments, considering different combination methods of antenna arrays, when the number of antenna ports is greater than 32, the number of antenna ports supported by the codebook is at least one in the set of the number of antenna ports; for example, the number of antenna ports P ∈ {36, 40, 44, 48, 56, 64, 78, 80, 96, 128}, satisfying that it is the sum of the number of antenna ports P CSI-RS ∈ {4, 8, 12, 16, 24, 32} supported by at most 4 single CSI-RSs, the multiple CSI-RS resource configurations satisfy at least one of the following configurations:

[0119] (1) The number of antenna ports corresponding to multiple CSI-RSs is all the same or not all the same, and the number of CSI-RS resources is the least. For example, for 36 antenna ports, 1 CSI-RS resource with 32 antenna ports and one CSI-RS resource with 4 antenna ports can be configured; this method has a relatively flexible antenna port arrangement, but the codebook design is relatively complex;

[0120] (2) The number of antenna ports corresponding to multiple CSI-RSs is all the same or not all the same, and the number of CSI-RS resources is the most. For example, for 36 antenna ports, 3 CSI-RS resources with 4 antenna ports and 1 CSI-RS resource with 24 antenna ports can be configured; this method has a relatively flexible antenna port arrangement, but the codebook design is relatively complex;

[0121] (3) The number of antenna ports corresponding to multiple CSI-RSs is all the same or not all the same. For example, for 36 antenna ports, 1 CSI-RS resource with 32 antenna ports and one CSI-RS resource with 4 antenna ports can be configured, or 3 CSI-RS resources with 4 antenna ports and 1 CSI-RS resource with 24 antenna ports can be configured;

[0122] In some other embodiments, to further enrich the form of the antenna array, when the antenna ports are more than 32, the number of antenna ports supported by the codebook is at least one of the set of antenna port numbers; for example, the number of antenna ports P ∈ {36, 40, 44, 48, 56, 64, 72, 78, 80, 96, 128}, which satisfies that the number of antenna ports P supported by a single CSI-RS CSI-RS is an integer multiple of ∈ {4, 8, 12, 16, 24, 32}, the maximum multiple is 4, and it can simultaneously satisfy the sum of the number of antenna ports P supported by at most 4 single CSI-RSs CSI-RS In the case of the sum of ∈ {4, 8, 12, 16, 24, 32}, the configuration of multiple CSI-RS resources satisfies at least one of the following configurations:

[0123] (1) The number of antenna ports corresponding to multiple CSI-RSs are all the same or not all the same, and the number of CSI-RS resources is the least. For example, for 36 antenna ports, 1 CSI-RS resource with 32 antenna ports and 1 CSI-RS resource with 4 antenna ports can be configured; for 64 antenna ports, 2 CSI-RS resources with 32 antenna ports can be configured. This configuration method is simple and relatively friendly to the codebook design. When the terminal reports for different CSI-RS resources, the terminal reporting amount can be reduced; furthermore, for the configuration with the same number of antenna ports, the indication of the codebook parameters can be relatively simplified. For example, multiple resources use the same codebook parameters; for the configuration that is not all the same, the codebook can be configured for different CSI-RS resources. And for the configuration that is not all the same, more port types can be combined to meet more antenna array designs.

[0124] (2) The number of antenna ports corresponding to multiple CSI-RSs are all the same or not all the same, and the number of CSI-RS resources is the most. For example, for 36 antenna ports, 3 CSI-RS resources with 4 antenna ports and 1 CSI-RS resource with 24 antenna ports can be configured; for 64 antenna ports, 4 CSI-RS resources with 16 antenna ports can be configured. This method has a relatively flexible antenna port arrangement, but the codebook design is relatively complex; furthermore, for the configuration with the same number of antenna ports, the indication of the codebook parameters can be relatively simplified. For example, multiple resources use the same codebook parameters; for the configuration that is not all the same, the codebook needs to be configured for different CSI-RS resources. And for the configuration that is not all the same, more port types can be combined to meet more antenna array designs.

[0125] (3) The number of antenna ports corresponding to multiple CSI-RSs may be all the same or not all the same. For example, for 36 antenna ports, one CSI-RS resource with 32 antenna ports and one CSI-RS resource with 4 antenna ports may be configured, or three CSI-RS resources with 4 antenna ports and one CSI-RS resource with 24 antenna ports may be configured. For 64 antenna ports, four CSI-RS resources with 16 antenna ports may be configured, or for 64 antenna ports, two CSI-RS resources with 32 antenna ports may be configured.

[0126] In some embodiments, the distribution (N1, N2) of the total antenna ports corresponding to all CSI-RS resources is indicated by the n1-n2 parameter, where the n1-n2 parameter is determined based on the distribution of the total antenna ports. In some other embodiments, the distribution of the total antenna ports corresponding to all CSI-RS resources is represented by the distribution (S1, S2) of multiple antenna port groups, where the antenna port group is the antenna ports corresponding to each CSI-RS resource. Among the distribution (S1, S2) of the multiple antenna port groups, S1 and S2 respectively indicate the number of antenna port groups distributed in the horizontal direction and the vertical direction.

[0127] The following uses actual examples to elaborate in detail. For the above antenna port configuration, during the codebook design process for the high-layer parameter codebook type codebookType in the UE's CSI-ReportConfig being 'typeI-single-panel-r19', 'typeI-Multi-panel-r19', 'typeII-r19', 'etypeII-r19', 'etypeII-CJT-r19', or 'etypeII-Doppler-r19', it is necessary to know the distribution (N1, N2) of the antenna ports and the corresponding oversampling configuration (O1, O2). The distribution of the antenna ports can be indicated to the terminal through RRC signaling. Among them, 'typeI-single-panel-r19', 'typeI-Multi-panel-r19', and 'typeII-r19' are respectively the codebooks 'typeI-single-panel', 'typeI-Multi-panel', and 'typeII'. The codebooks support a maximum of 128 CSI-RS antenna ports across all CSI-RS resources, or support configuring multiple CSI-RS resources for channel measurement, and the sum of the antenna port numbers of the multiple CSI-RS resources is greater than 32. The specific indication method can adopt at least one of the following forms:

[0128] Method 1: Indicated by the 'n1-n2' parameter in RRC, the specific value of (N1, N2) is expanded. For example, assuming a CSI-RS resource with 32 antenna ports, the distribution of antenna ports is (N1, N2) = (4, 4), while for a CSI-RS with 64 antenna ports, the distribution of antenna ports can be expressed as (N1, N2) = (8, 4) or (N1, N2) = (4, 8); the following gives the port distribution (N1, N2) and oversampling configuration (O1, O2) corresponding to different antenna ports for the 'typeI-single-panel-r19', 'typeI-Multi-panel-r19', 'typeII-r19', 'etypeII-r19', 'etypeII-CJT-r19' or 'etypeII-Doppler-r19' codebook. For the supported antenna ports, P CSI-RS ∈{4,8,12,16,24,32} multiples, the main consideration is to expand the port distribution (N1, N2) corresponding to a single CSI-RS resource horizontally or vertically. Therefore, for the 'typeI-single-panel-r19', 'typeI-Multi-panel-r19', 'typeII-r19', 'etypeII-r19', 'etypeII-CJT-r19' or 'etypeII-Doppler-r19' codebook, the configuration shall be at least one or more of the following Table 8:

[0129] Table 8: Antenna port distribution and oversampling configuration

[0130] For Type I, multiple panel codebooks are configured with at least one or more of the following Table 9:

[0131] Table 9: Antenna port distribution configuration for the 'typeI-Multi-panel-r19' codebook

[0132] Method 2: To simplify RRC parameter configuration, a new CSI-RS resource distribution indicator or antenna port group distribution indicator is added to RRC. For example, it is configured through 's1-s2' in RRC. The specific corresponding format can be (S1, S2), where S1 represents the number of CSI-RS resources / antenna port groups arranged in the horizontal direction, and S2 represents the number of CSI-RS resources / antenna port groups arranged in the vertical direction. If the CSI-RS resources / antenna port groups are arranged in the horizontal direction or the vertical direction, the distribution of the antenna ports contained in the corresponding CSI-RS resources / antenna port groups is spliced ​​in the horizontal direction or the vertical direction. For example, assuming a CSI-RS resource with 32 antenna ports, the distribution of the antenna ports is (N1, N2) = ( 4,4), while the 64-antenna-port CSI-RS consists of two 32-antenna-port CSI-RS resources or antenna port groups. The specific distribution of CSI-RS resources or antenna port groups can be (S1,S2) = (2,1) or (S1,S2) = (1,2), where (S1,S2) = (2,1) indicates that the horizontal direction contains two CSI-RS resources / antenna port groups and the vertical direction contains one CSI-RS resource / antenna port group. Therefore, the number of horizontal and vertical antenna ports for the 64-antenna-port CSI-RS is 2S1N1 = 16 and 2S2N2 = 4, respectively, where 2 represents two polarization directions. It is worth noting that the antenna port group here corresponds to the antenna port of one CSI-RS resource.

[0133] Therefore, for a codebook whose codebook type codebookType is 'typeI-single-panel-r19', 'typeI-Multi-panel-r19', 'typeII-r19', 'etypeII-r19', 'etypeII-CJT-r19' or 'etypeII-Doppler-r19', the configuration of the codebook is at least one or more of the following:

[0134] Table 10: Antenna port group distribution and oversampling configuration

[0135] In addition, for codebook schemes that support a maximum of 128 antenna ports across multiple CSI-RS resources, if multiple CSI-RS resources are located in the same slot, the mapping of multiple CSI-RS resources in the time domain is at least separated by X OFDM symbols, for example, the value of X can be 1, 2, 3, or 4.

[0136] For codebook designs that combine multiple CSI-RS resources to support a maximum of 128 antenna ports or more than 32 antenna ports, the terminal needs to determine the specific form of terminal feedback information and the terminal feedback overhead based on network-side instructions. In the existing standard Type II codebook, which supports a maximum of 32 antenna ports for a single CSI-RS, the Rel-15 Type II codebook directly specifies the number of possible spatial bases; the Rel-16 eType II and Rel-17 FeType II codebooks indicate this through codebook parameter combinations. If this codebook is expanded to combine multiple CSI-RS resources to support a maximum of 128 antenna ports or more than 32 antenna ports, the specific form of terminal feedback information and the terminal feedback overhead can still be determined through codebook parameter combinations for eType II and FeType II. However, since multiple CSI-RS resources are involved, the codebook parameter combination indication format needs to be determined, as well as how the codebook parameter combination adapts to codebooks with a maximum of 128 antenna ports or more than 32 antenna ports.

[0137] In some embodiments, when jointly reporting the multiple CSIs, the terminal determines the multiple CSIs corresponding to the multiple CSI-RS resources based on the same set of codebook parameter combinations; the codebook parameter combination is indicated by a codebook parameter combination indicator (ie, paramCombination).

[0138] The following is a detailed description using an actual example. For 'etypeII-r19' (or 'etypeII-PortSelection-r19, or 'FetypeII-PortSelection-r19', or 'etypeII-Doppler-r19', or 'typeII-Doppler-PortSelection-r19'), a codebook with a codebook parameter combination needs to be configured. CSI corresponding to all CSI-RS resources is acquired based on the same codebook parameter combination list, and CSI corresponding to all CSI-RSs is acquired based on the same set of codebook parameter combinations. The codebook parameter combination is indicated to the terminal through RRC / DCI / MAC CE signaling. For example, CSI corresponding to all CSI-RS resources is acquired based on the codebook parameter combination list of the existing eTypeII codebook (or eTypeII port selection codebook, or FeTypeII port selection codebook, or eTypeII PMI prediction codebook, or FeTypeII PMI prediction port selection codebook) with a maximum of 32 antenna ports (3GPP 38.214 Table 1). 5.2.2.2.5-1, or Table 5.2.2.2.6-1, or Table 5.2.2.2.7-1, or 3GPP 38.214 Table 5.2.2.2.10-1, or 3GPP 38.214 Table 5.2.2.2.11-1) to determine the specific parameter combination to be used in the codebook parameter combination list. This can be configured through RRC signaling. At the same time, the corresponding field, configuration, or parameter should be added to the RRC signaling to distinguish whether the current configuration is applicable to a codebook with a maximum of 128 antenna ports or greater than 32 antenna ports.It should be noted that we do not restrict the specific form of the above configuration here, but only give possible implementation methods, for example: in RRC CodebookConfig A new codebook configuration option, CodebookConfig-r19, is added under IE. This configuration includes two codebook types: Type I and Type II. For type II codebooks, paramCombination parameter configuration is required. This paramCombination parameter configuration applies to all CSI-RS resources. At the same time, for multiple CSI-RS resources, the specific form of antenna port distribution can be determined by combining the antenna port distribution indicator 'n1-n2' for a single CSI-RS resource and the distribution indicator 's1-s2' for a CSI-RS resource or antenna port group. The antenna port distribution for the case where the total number of antenna ports for multiple combined CSI-RS resources is greater than 32 is shown in Table 10. Alternatively, the antenna port distribution indicator 'n1-n2' for a single CSI-RS resource is extended. The specific extended antenna port distribution for the case where the total number of antenna ports for multiple combined CSI-RS resources is greater than 32 is shown in Table 8. For multi-panel scenarios, the specific extended antenna port distribution for the case where the total number of antenna ports for multiple combined CSI-RS resources is greater than 32 is shown in Table 9. Because the channels corresponding to the antenna ports of multiple CSI-RS resources have a certain degree of spatial consistency and time domain coherence, the same codebook parameters are used to represent the CSI corresponding to multiple CSI-RS resources. This configuration method helps to simplify RRC signaling configuration and reduce RRC signaling indication overhead. However, since the CSI measured by all CSI-RS resources uses the same set of parameters, it will have a certain impact on the CSI description accuracy, which will lead to a certain degree of system performance degradation.

[0139] In other embodiments, a new antenna port configuration indication Antenna port may be added for the codebook parameter configuration of Type I and / or Type II in the CodebookConfig / CodebookConfig-r16 / CodebookConfig-r17 / CodebookConfig-r18 configuration under the existing RRC CodebookConfig IE. The configurable value is the number of supported antenna ports, such as 32 / 64 / 128, etc. This parameter configuration is optional. If it is defaulted, it means that it is for the existing codebook with no more than 32 antenna ports; or a new CSI-RS resource number configuration indication resource is added. The value that can be configured for num is the number of supported CSI-RS resources, such as 1 / 2 / 3 / 4. This parameter configuration is optional. If it is defaulted, it indicates that the codebook is for an existing codebook with no more than 32 antenna ports. Alternatively, the codebook configuration can be directly distinguished as being for a codebook with a maximum of 128 antenna ports or greater than 32 antenna ports based on the configuration of the 'n1-n2' codebook subset constraint. The specific port distribution can be obtained based on the codebook subset constraint associated with the actual antenna port distribution indication 'n1-n2'. Alternatively, the number of ports applicable to the current codebook can be distinguished based on the RRC signaling indication 's1-s2' for the distribution of CSI-RS resources or antenna port groups, combined with the single CSI-RS resource antenna port distribution indication 'n1-n2'. If 's1-s2' is configured by default, it indicates that the current codebook is applicable to a maximum of 32 antenna ports. The specific number of ports can be determined based on the configuration of n1-n2. If 's1-s2' is configured, the distribution of multiple CSI-RS resource antenna ports can be determined based on Table 10.

[0140] In some other embodiments, the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations, including: the multiple CSIs are combined into a joint CSI; the joint CSI is determined based on a set of codebook parameter combinations in a codebook parameter combination list, wherein the codebook parameter combination list includes multiple sets of codebook parameter combinations. The latitude of the precoding matrix corresponding to the single stream and single subband in the joint CSI is NP×N R , where N is the number of CSI-RS resources, P is the number of antenna ports for a single CSI-RS resource, and N R is the number of RF channels or antenna ports corresponding to the terminal, that is, the joint CSI is composed of the CSI corresponding to multiple CSI-RS resources spliced ​​according to the antenna port, for example Where V is the precoding matrix corresponding to the joint CSI, and V n It is the precoding matrix corresponding to the CSI corresponding to each CSI-RS resource.

[0141] For codebooks that require configuration of codebook parameter combinations, the joint CSI corresponding to all CSI-RS resources is obtained based on a set of codebook parameter combinations in a codebook parameter combination list, and the set in the codebook parameter combination list can be indicated to the terminal through RRC / DCI / MAC CE signaling. For example, the acquisition of the joint CSI corresponding to all CSI-RS resources is based on the codebook parameter combination list (3GPP 38.214 Table 5.2.2.2.5-1, or Table 5.2.2.2.6-1, or Table 5.2.2.2.7-1, or 3GPP 38.214 Table 5.2.2.2.10-1, or 3GPP 38.214 Table 5.2.2.2.10-1) of the existing eType II codebook (or eType II port selection codebook, or FeType II port selection codebook, or eType II PMI prediction codebook, or FeType II PMI prediction port selection codebook) with a maximum of 32 antenna ports. 5.2.2.2.11-1) to determine, the number of frequency domain basis can be kept unchanged, and the selected spatial basis or antenna port can be increased, or the number of frequency domain basis can be kept unchanged, and the port selection coefficient and the non-zero coefficient selection coefficient can also be kept unchanged, or the number of frequency domain basis can be kept unchanged, and smaller values ​​of the port selection coefficient and / or the non-zero coefficient selection coefficient can be introduced, as shown below: For the 'typeII-r19' codebook, the number of spatial basis can be further expanded on the existing number of spatial basis L∈{2,3,4}. On the existing number of candidate spatial basis L, the number of spatial basis can be expanded according to the number of configured CSI-RS resources. For example, the existing number of spatial basis L is multiplied by 2, 3, and 4 at the same time to obtain a candidate number of spatial basis including at least one of the following candidate values ​​L∈{2,3,4,6,8,9,12,16}.

[0142] For the eType II codebook, based on the codebook parameter combination list 3GPP 38.214 Table 5.2.2.2.5-1, the number of frequency domain bases and the codebook non-zero coefficient selection coefficients can be kept unchanged, and the selected spatial bases or antenna ports can be added. For example, the number of spatial bases L in each row of codebook parameter combinations is multiplied by 2, 3, or 4 to form a new codebook parameter combination, and the number of spatial bases includes at least one of the following candidate values ​​L∈{2,4,6,8,12,16,18,24}; and for the selection of spatial bases, it is selected from the spatial candidate base DFT bases corresponding to the total number of CSI-RS resource antenna ports. The specific selection indication overhead can be expressed as Wherein N represents the number of CSI-RS resources.

[0143] For the eType II port selection codebook: Based on the codebook parameter combination list 3GPP 38.214 Table 5.2.2.2.6-1, the number of port selections L in each row of the codebook parameter combination is multiplied by 2, 3, or 4 to form a new codebook parameter combination; and the number of port selections includes at least one of the following candidate values ​​L∈{2,4,6,8,12,16,18,24}; and for the selection of antenna ports, it is selected from the antenna port candidate basis DFT basis corresponding to the total number of antenna ports of multiple CSI-RS resources. The specific selection indication overhead can be expressed as Wherein N represents the number of CSI-RS resources.

[0144] For the FeTypeII port selection codebook: Based on the codebook parameter combination list 3GPP 38.214 Table 5.2.2.2.7-1, the number of frequency domain bases M and the non-zero coefficient selection coefficient β can be kept unchanged. In order to control the reporting overhead, a smaller α value can be introduced, such as α∈{1 / 4,1 / 8}; or the number of frequency domain bases M and the port selection coefficient α are kept unchanged, and a smaller non-zero coefficient selection coefficient β is introduced, such as β∈{1 / 4,1 / 8}; the number of selected ports can be expressed as K1=αNP, where N represents the number of CSI-RS resources and P is the number of antenna ports of a single CSI-RS resource. The port selection overhead can be expressed as Wherein, L=K1 / 2 represents the number of CSI-RS resources.

[0145] For the above method, we believe that for the eType II codebook / eType II port selection codebook / FeType II port selection codebook, the codebook parameter combination list used when supporting a maximum of 128 antenna ports or a codebook with more than 32 antenna ports is at least at least one of the codebook parameter combinations newly added in Table 3GPP 38.214 Table 5.2.2.2.5-1 / 3GPP 38.214 Table 5.2.2.2.6-1 / 3GPP 38.214 Table 5.2.2.2.7-1;

[0146] There are many ways to configure the codebook parameter combination. It should be noted that we do not specifically restrict the specific form of the above configuration here, but only give possible implementation methods, as follows, for example,

[0147] The CodebookConfig / CodebookConfig-r16 / CodebookConfig-r17 configuration under the existing RRC CodebookConfig IE contains the paramCombination configuration for the codebook parameter configuration of the codebook type TypeI and / or TypeII, and is configured through paramCombination; for the codebook parameter configuration of the codebook type TypeI and / or TypeII, a new antenna port configuration indication Antenna port is added. The configurable value is the number of supported antenna ports, such as 32 / 64 / 128, etc. This parameter configuration is optional. If it is defaulted, it means that it is for the existing codebook with no more than 32 antenna ports; or a new CSI-RS resource number configuration indication resource is added The value that can be configured for num is the number of supported CSI-RS resources, such as 1 / 2 / 3 / 4. This parameter configuration is optional. If it is defaulted, it indicates that the codebook is for an existing codebook with no more than 32 antenna ports. Alternatively, the codebook configuration can be directly distinguished as being for a codebook with a maximum of 128 antenna ports or greater than 32 antenna ports based on the configuration of the 'n1-n2' codebook subset constraint. The specific port distribution can be obtained based on the codebook subset constraint associated with the actual antenna port distribution indication 'n1-n2'. Alternatively, the number of ports applicable to the current codebook can be distinguished based on the RRC signaling indication 's1-s2' for the distribution of CSI-RS resources or antenna port groups, combined with the single CSI-RS resource antenna port distribution indication 'n1-n2'. If 's1-s2' is configured by default, it indicates that the current codebook is applicable to a maximum of 32 antenna ports. The specific number of ports can be determined based on the configuration of n1-n2. If 's1-s2' is configured, the distribution of multiple CSI-RS resource antenna ports can be determined based on Table 10.

[0148] Or add a new CodebookConfig-r19 codebook configuration option under RRC CodebookConfig IE. The codebook types included in this configuration are TypeI and TypeII. For typeII codebooks, paramCombination needs to be configured. The specific codebook parameter combination is configured through paramCombination.

[0149] The above configuration method can simplify the RRC configuration to a certain extent. There is no need to configure codebook parameter combinations for different CSI-RS resources separately. This configuration is possible because the antenna ports of multiple CSI-RS resources are mapped to the same physical antenna array. The channels corresponding to different antenna ports are spatially consistent. Therefore, the CSI corresponding to multiple CSI-RS resources can be jointly represented based on the same set of codebook parameters.

[0150] In other embodiments, for a codebook that requires configuration of a codebook parameter combination, CSI corresponding to all CSI-RS resources is acquired based on the same codebook parameter combination list, and CSI corresponding to all CSI-RSs is acquired based on two or more codebook parameter combinations, and the codebook parameter combination is indicated to the terminal through RRC / DCI / MAC CE signaling; for example, CSI corresponding to all CSI-RS resources is acquired based on the codebook parameter combination list (3GPP 38.214 Table 5.2.2.2.5-1, or Table 5.2.2.2.6-1, or Table 5.2.2.2.7-1, or 3GPP 38.214 Table 5.2.2.2.10-1, or 3GPP 38.214 Table 5.2.2.2.10-1) of an existing eType II codebook (or eType II port selection codebook, or FeType II port selection codebook, or eType II PMI prediction codebook, or FeType II PMI prediction port selection codebook) with a maximum of 32 antenna ports. 5.2.2.2.11-1) determines which codebook parameter combination the CSI corresponding to each CSI-RS resource is based on. This can be configured through RRC information. At the same time, corresponding fields or configurations should be added to the RRC signaling to distinguish whether the current configuration is applicable to a codebook with a maximum of 128 antenna ports or greater than 32 antenna ports. It should be noted that we do not specifically restrict the specific form of the above configuration here, but only provide possible implementation methods, as follows, for example,

[0151] In the CodebookConfig / CodebookConfig-r16 / CodebookConfig-r17 / CodebookConfig-r18 configuration under the existing RRC CodebookConfig IE, the codebook parameter configuration for codebook type TypeI and / or TypeII includes the paramCombination configuration. New paramCombination configurations for different CSI-RS resources are added. Each CSI-RS corresponds to one paramCombination configuration, up to 4. If only one paramCombination is configured, it means that the current codebook is for a maximum of 32 antenna ports. If multiple paramCombinations are configured, it means that the current codebook is for multiple CSI-RS resources and the total number of antenna ports is greater than 32.

[0152] Or add a new CodebookConfig-r19 codebook configuration option under RRC CodebookConfig IE. The codebook types included in this configuration are TypeI and TypeII. For typeII codebooks, paramCombination needs to be configured. ParamCombination configuration is performed for different CSI-RS resources. Each CSI-RS corresponds to one paramCombination configuration, up to 4; if only two paramCombinations are configured, it means that the current codebook is configured with two CSI-RS measurement resources; it should be pointed out that if the codebook type is TypeII and the codebook paramCombination needs to be configured, the mapping relationship between the corresponding CSI-RS resource and the codebook parameter combination will also be configured during the codebook parameter configuration, and multiple CSI-RS can correspond to one codebook parameter combination; the above configuration method can describe the measured CSI results with different accuracies according to the measurement results of different CSI-RS resources, so that the base station can better recover the CSI, thereby helping to improve the performance of the system. If multiple CSI-RS resources for channel measurement are configured, but only one set of codebook parameter combinations is configured, it indicates that the current codebook parameter combination is applicable to the representation of the CSI of all CSI-RS resources.

[0153] In other embodiments, for codebooks requiring configuration of codebook parameter combinations, all CSI-RS resources correspond to the same frequency-domain basis indication parameter and non-zero coefficient selection coefficient, but may correspond to different numbers of spatial basis (as shown in Table 11), and may correspond to multiple numbers of spatial basis, with the final use of which one determined by the terminal. The terminal determines the corresponding basis number and reports it to the base station. For example, the indication of the spatial basis corresponding to all CSI-RS resources is determined based on the codebook parameter combination list (3GPP 38.214 Table 5.2.2.2.8-1 or 3GPP 38.214 Table 5.2.2.2.9-1) of the existing eType II CJT codebook (or FeType II CJT port selection codebook) with a maximum of 32 antenna ports, as shown in Tables 11-12:

[0154] Table 11: Target Codebook parameter configuration

[0155] or

[0156] Table 12: Target Codebook parameter configuration

[0157] There are many ways to configure the codebook parameter combination. It should be noted that we do not specifically restrict the specific form of the above configuration here, but only give possible implementation methods, as follows, for example,

[0158] In the existing RRC CodebookConfig IE, the codebook parameter configuration for codebook types Type I and / or Type II includes the paramCombination configuration, which is indicated by the newly added spatial basis parameter configuration spatial-paramCombination. If this parameter is configured, it indicates that it is for the newly added codebook type;

[0159] Or add a new CodebookConfig-r19 codebook configuration option under RRC CodebookConfig IE. The codebook types included in this configuration are TypeI and TypeII. For typeII codebooks, paramCombination needs to be configured, which is indicated by configuring spatial-paramCombination through the domain basis parameter.

[0160] In some embodiments, when multiple CSIs correspond to the same spatial basis or antenna port, the same layer in the precoding matrix indicator PMI corresponding to each CSI is determined based on the same spatial basis or antenna port (i.e., the CSI-RS common method), which helps the terminal reduce the bit overhead when multiple CSIs are jointly reported.

[0161] The following is a detailed explanation using a practical example. When calculating the CSI corresponding to multiple CSI-RS resources, the selection of the spatial basis (for the eType II enhanced codebook and the eType II PMI prediction enhanced codebook) or the selection of the antenna port (eType II port selection enhanced codebook, FeType II port selection enhanced codebook, and FeType II PMI prediction port selection enhanced codebook) adopts the CSI-RS common method, that is, the calculation of the CSI corresponding to multiple CSI-RS resources or antenna port groups selects the same spatial basis or antenna port. This requires that multiple CSI-RS resources correspond to the same number of ports or the distribution mode (N1, N2) of multiple CSI-RS resource antenna ports is the same, and the oversampling groups (O1O2) are the same; for the eType II enhanced codebook or the eType II PMI prediction enhanced codebook, it involves the selection of the oversampling group and the selection of the spatial basis under the oversampling group. The indication overhead of the oversampling group selection can be expressed as The indication overhead of the spatial basis selection is Where P / 2 represents the number of antenna ports in a single polarization direction, L corresponds to the number of spatial bases selected for a single polarization direction, O1 corresponds to the number of oversampling times in the horizontal direction, and O2 corresponds to the number of oversampling times in the vertical latitude. The spatial bases selected for different polarization directions are the same. The bit overhead required for selecting antenna ports for eTypeII port selection, FeTypeII port selection, and FeTypeII PMI prediction port selection is Among them, P / 2 represents the number of antenna ports in a single polarization direction, L corresponds to the number of ports selected in a single polarization direction, and the antenna ports selected for different polarization directions are the same. The bit sequence of the above specific indication can be placed in part 2 of the CSI feedback. The above selection method can reduce the bit overhead of terminal feedback. The CSI feedback of multiple CSI-RS resources only needs to use one spatial basis selection / port selection indication overhead. The reason why the selection of the spatial basis or the selection of the number of ports can adopt the CSI-RS common method is mainly because the multiple CSI information obtained by measuring multiple CSI-RS resources has a strong correlation in the spatial domain.

[0162] In other embodiments, when calculating the CSI corresponding to multiple CSI-RS resources, the selection of the spatial basis of the CSI corresponding to different CSI-RS resources (for the eType II enhanced codebook, the eType II PMI prediction enhanced codebook) or the selection of the antenna port (for the eType II port selection enhanced codebook, the FeType II port selection enhanced codebook, and the FeType II PMI prediction port selection enhanced codebook) is independent, that is, the CSI calculation corresponding to different CSI-RS resources selects the spatial basis or antenna port respectively; for the eType II enhanced codebook or the eType II PMI prediction enhanced codebook, the selection of the oversampling group and the selection of the spatial basis under the oversampling group are involved, and the indication overhead of the oversampling group selection can be expressed as The bit overhead required to indicate the selection of the spatial basis is Where P / 2 represents the number of antenna ports in a single polarization direction, L corresponds to the number of spatial bases selected for a single polarization direction, N is the number of CSI-RS resources, O1 corresponds to the number of oversampling times in the horizontal direction, and O2 corresponds to the number of oversampling times in the vertical latitude. The spatial bases selected for different polarization directions are the same; and for the indication of antenna port selection for eTypeII port selection enhanced codebook, FeTypeII port selection enhanced codebook, and FeTypeII PMI prediction port selection enhanced codebook, the bit overhead required is Where P / 2 represents the number of antenna ports for a single polarization, L corresponds to the number of ports selected for a single polarization, and N is the number of CSI-RS resources. The selected antenna ports for different polarizations are the same. The bit sequence for this indication can be included in part 2 of the CSI feedback. This approach can help improve the accuracy of CSI information corresponding to different CSI-RS resources, but the terminal needs to report multiple spatial bases or antenna port selection indicators.

[0163] In other embodiments, when calculating the CSI corresponding to multiple CSI-RS resources, in the process of selecting the spatial basis of the CSI corresponding to different CSI-RS resources (for the eType II enhanced codebook and the eType II PMI prediction enhanced codebook), the oversampling group is first selected, and then the spatial basis is selected. The selection of the oversampling group can adopt the CSI-RS common method, that is, the PMI calculation of the CSI corresponding to different CSI-RS resources is based on the same oversampling group; and the selection of the spatial basis adopts an independent method, that is, the CSI calculation corresponding to different CSI-RS resources is based on the same oversampling group but the spatial basis is selected separately; and for the eType II enhanced codebook or the eType II PMI prediction enhanced codebook, the indication overhead of the oversampling group selection can be expressed as The bit overhead required to indicate the selection of the spatial basis is Where P / 2 represents the number of antenna ports for a single polarization, L corresponds to the number of spatial bases selected for a single polarization, N is the number of CSI-RS resources, O1 corresponds to the number of horizontal oversampling times, and O2 corresponds to the number of vertical oversampling times. The same spatial bases are selected for different polarizations. The bit sequence indicated above can be included in part 2 of the CSI feedback. This approach can help improve the accuracy of CSI information corresponding to different CSI-RS resources.

[0164] It is worth noting that in the above-mentioned eTypeII enhanced codebook / eTypeII PMI prediction enhanced codebook / eTypeII port selection enhanced codebook / FeTypeII port selection enhanced codebook / FeTypeII PMI prediction port selection enhanced codebook, the so-called enhancement mainly refers to the existing eTypeII codebook / eTypeII PMI prediction codebook / eTypeII PMI prediction port selection codebook / eTypeII port selection codebook / FeTypeII port selection codebook / FeTypeII PMI prediction port selection codebook supporting a maximum of 128 antenna ports across multiple CSI-RS resources or supporting more than 32 antenna ports or multiple CSI-RS resources for channel measurement across multiple CSI-RS resources.

[0165] In some embodiments, precoding matrix indicators (PMIs) corresponding to the multiple CSIs are determined based on the same number of non-zero coefficients, which can greatly reduce the feedback overhead of the terminal.

[0166] The following is a detailed explanation using a practical example. The CSI corresponding to each CSI-RS resource contains the same number of non-zero coefficients; and the number of non-zero coefficients is placed in part 1. This can greatly reduce the indication overhead of the number of non-zero coefficients. For example, if there are 4 CSI-RS resources, if the total number of non-zero coefficients contained in the CSI corresponding to all CSI-RS resources is indicated in part 1 as X, the number of bits required is If the CSI corresponding to each CSI-RS resource contains the same number of non-zero coefficients, the number of bits required is Relative to At least 2 bits of overhead are saved.

[0167] In some embodiments, the non-zero coefficients of the same layer / stream in each of the CSIs are determined based on the same position, which can reduce the feedback overhead of the terminal.

[0168] The following is a detailed explanation using a practical example. The selection of non-zero coefficients adopts the CSI-RS common method, that is, when selecting non-zero coefficients for each layer, the PMI of the CSI corresponding to each CSI-RS resource selects non-zero coefficients in the same position. The position of the non-zero coefficients is usually indicated by a bitmap, and the position indication bitmap information of the non-zero coefficients is placed in part 2. In this way, the terminal only needs to report a bitmap corresponding to the non-zero coefficients, thereby greatly reducing the feedback overhead of the terminal.

[0169] This embodiment provides a method for reporting channel state information, which can be applied to a terminal. Specifically, as shown in FIG4a , the method includes:

[0170] Step A100: receiving configuration information sent by a base station, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported;

[0171] Step A200: Based on the configuration information, multiple CSIs corresponding to the selected multiple CSI-RS resources are reported, and the reporting amount corresponding to the CSI includes the channel state information reference signal resource indication CRI. The multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

[0172] This embodiment provides a method for reporting channel state information, which can be applied to a base station. Specifically, as shown in FIG4b , the method includes:

[0173] Step B100: Send configuration information, where the configuration information is used to indicate the number n1 of channel state information CSIs to be reported;

[0174] Step B200: Receive multiple CSIs corresponding to the selected multiple CSI-RS resources, where the reporting amount corresponding to the CSI includes a channel state information reference signal resource indication CRI, and the multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

[0175] Specifically, for CSI reporting based on CRI extension under the hybrid beamforming architecture, the terminal can report multiple CRIs and CSIs, and the CSI includes at least one of PMI, RI, and CQI. The more CRIs and corresponding CSIs reported by the terminal, the greater the probability that the terminal participates in pairing (that is, the base station uses the same time-frequency resources to schedule multiple terminals), which is more conducive to improving system performance. However, in order to reduce the overhead of terminal reporting, the base station can impose some constraints on the number of CRIs and corresponding CSIs reported by the terminal, or let the terminal decide how many CRIs and corresponding CSIs to report. The multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resource, rank information of the CSI corresponding to the CSI-RS resource, and reporting overhead information of the CSI corresponding to the CSI-RS resource. The joint reporting of multiple CSIs based on the predefined priority information can enable high-priority information to be reported first. Detailed examples of this part are provided later.

[0176] In some embodiments, the base station configures a maximum of N CSI-RS measurement resources for the terminal, for example, N=4, and can instruct the terminal through configuration information to report the PMI, RI, and CQI obtained by measuring each CSI-RS resource. At this time, the terminal does not need to report CRI information. The configuration information also includes configuration information for multiple CSI-RS resources and configuration information for reporting channel state information CSI. The base station will send down channel measurement reference information before receiving the multiple CSIs corresponding to the selected multiple CSI-RS resources. In some embodiments, after receiving the multiple CSIs corresponding to the selected multiple CSI-RS resources, the base station also sends downlink data with added precoding. In some embodiments, the configuration information also includes codebook parameter combination information. In some embodiments, the total number of antenna ports corresponding to the multiple CSI-RS resources is greater than the predefined threshold of 32, and the multiple CSI-RS resources are used for channel measurement.

[0177] In some embodiments, the terminal receives configuration information sent by the base station, the configuration information is used to indicate the number n1 of channel state information CSI to be reported; the number n1 is less than or equal to the number n2 of CSI-RS resources, and the terminal reports the n1 CSI indicated in the configuration information to the base station. For example, the base station configures a maximum of n2 (i.e., N) CSI-RS measurement resources for the terminal and instructs the terminal to report n1 (i.e., N CRI ) CSI corresponding to CSI-RS resources, wherein the CSI includes at least one of PMI, RI, and CQI, and N≥N CRI The terminal reports n1 (ie N CRI ) CSI corresponding to the CSI-RS resources, and report n1 (ie N CRI ) CRI corresponding to the CSI-RS resources.

[0178] In some embodiments, the terminal receives configuration information sent by the base station, and the configuration information is used to indicate the number n1 of channel state information CSI to be reported; the number n1 is less than or equal to the n2, and the configuration information also includes an instruction for the terminal to report a CSI corresponding to the configured CSI-RS resource to the base station, and the number of CRIs is n1-1. The terminal reports the n1 CSIs indicated in the configuration information to the base station, wherein the CSI includes a CSI corresponding to the configured CSI-RS resource that the base station instructs the terminal to report. For example, the base station configures a maximum of n2 (i.e., N) CSI-RS measurement resources for the terminal, and specifies that the CSI corresponding to one of the CSI-RS resources must be reported, and then instructs the terminal to report n1 (i.e., N CRI ) CSI corresponding to CSI-RS resources, and N ≥ N CRI The terminal reports n1 (ie NCRI ) CSI corresponding to the CSI-RS resources, and report n1-1 (ie N CRI -1) CRI corresponding to the CSI-RS resource.

[0179] In some embodiments, the terminal receives configuration information sent by the base station, the configuration information is used to indicate the number n1 of channel state information CSI to be reported; the number n1 is less than or equal to the n2, the configuration information also includes reporting a CSI corresponding to the configured CSI-RS resource, the number of CRIs is n1-1, and the terminal reports a CSI corresponding to the configured CSI-RS resource and / or the CSI corresponding to the selected n3 CSI-RS resources included in the configuration information to the base station. For example, the base station configures a maximum of n2 (i.e., N) CSI-RS measurement resources for the terminal, and the terminal decides to report n1 (i.e., N CRI ) CSI corresponding to CSI-RS resources, wherein the CSI includes at least one of PMI, RI, and CQI, where N≥N CRI , and the terminal informs the base station by reporting CRI which CSI-RS resources correspond to the CSI to be reported; or the base station configures a maximum of n2 (i.e., N) CSI-RS measurement resources for the terminal, and specifies that the CSI corresponding to one of the CSI-RS resources is reported by default, and the terminal decides to report n1-1 (i.e., N CRI -1) CSI corresponding to the CSI-RS resource, where N≥N CRI , and the terminal informs the base station by reporting CRI which CSI-RS resources correspond to the CSI to be reported.

[0180] In some embodiments, the method of reporting the multiple CSIs corresponding to the selected multiple CSI-RS resources based on the configuration information includes at least one of the following: reporting the multiple CSIs corresponding to the selected multiple CSI-RS resources based on a bitmap method; and reporting the multiple CSIs corresponding to the selected multiple CSI-RS resources based on a combination number method.

[0181] The following is a detailed description using an actual example. The manner in which the terminal reports the multiple CSIs corresponding to the selected multiple CSI-RS resources may be at least one of the following manners:

[0182] Method 1: Reporting is performed through a bitmap. The bitmap length is N bits, and each CSI-RS resource corresponds to 1 bit. If the bit is 1, it means that the terminal has reported the CSI corresponding to the CSI-RS resource. The CSI includes at least one of PMI, RI, and CQI. When the base station specifies that the CSI corresponding to a CSI-RS resource needs to be reported, the bitmap length is N-1 bits. The above bitmap indicates that for CSI reporting divided into part 1 and part 2, the bitmap indication is placed in part 1. In this way, after receiving part 1, the base station can further determine the bit length in part 2.

[0183] Method 2: Report by combining the number of combinations, for the base station to indicate the terminal N CRI In some embodiments, the terminal can report in this way. For example, for some embodiments (the base station configures a maximum of N CSI-RS measurement resources for the terminal and instructs the terminal to report N CRI The CSI corresponding to the CSI-RS resources includes at least one of PMI, RI, and CQI, and N≥N CRI , the terminal reports N based on the instruction of the base station CRI CSI corresponding to CSI-RS, and report N CRI CSI-RS resources corresponding to the CRI), select N from N CSI-RS resources CRI There are Species (Note: Indicates selecting N from N CSI-RS resources CRI possible selection methods for each resource), and Need bits, obviously if N=4, N CRI =2, then this indication method requires 3 bits. For some embodiments (the base station configures a maximum of N=4 CSI-RS measurement resources for the terminal, and the terminal decides to report N CRI CSI corresponding to CSI-RS resources, where N≥N CRI , and the terminal informs the base station by reporting CRI which CSI-RS resources correspond to the CSI to be reported. Since it is the terminal that decides N CRI The terminal needs to indicate the value of N CRI , it is also necessary to indicate which CSI-RS resources are used. The terminal indicates the overhead of For example, when N=4, N CRI=2, the terminal indicates an overhead of 5 bits. For some embodiments (the base station configures a maximum of N=4 CSI-RS measurement resources for the terminal, and specifies that the CSI corresponding to one of the CSI-RS resources is reported by default, and then instructs the terminal to report N CRI CSI corresponding to CSI-RS resources, and N ≥ N CRI , the terminal reports N based on the instruction of the base station CRI CSI corresponding to CSI-RS, and report N CRI -1 CSI-RS resource corresponding to the CRI), since the base station specifies that the CSI corresponding to a certain CSI-RS resource needs to be reported, and indicates the N CRI CSI-RS resources corresponding to the CSI, the terminal only needs to select N from N-1 CSI-RS resources CRI -1 resource, and the options are possibility, and express Need For some embodiments (the base station configures a maximum of N=4 CSI-RS measurement resources for the terminal and specifies that the CSI corresponding to one of the CSI-RS resources is reported by default, and the terminal decides to report N CRI -CSI corresponding to 1 CSI-RS resource, where N≥N CRI , and the terminal informs the base station by reporting CRI which CSI-RS resources correspond to the CSI). Since the base station specifies that the CSI corresponding to a certain CSI-RS resource needs to be reported, the terminal determines N CRI The terminal needs to indicate the value of N CRI -1, it is also necessary to indicate which CSI-RS resources are used. The terminal indicates the overhead of For example, when N=4, N CRI =2, the terminal indicates that the overhead is 4 bits.

[0184] Method 3: It should be noted that, for some embodiments (the base station configures a maximum of N CSI-RS measurement resources for the terminal and instructs the terminal to report N CRI The CSI corresponding to the CSI-RS resources includes at least one of PMI, RI, and CQI, and N≥N CRI , the terminal reports N based on the instruction of the base station CRI CSI corresponding to CSI-RS, and report N CRI CSI-RS resources corresponding to CRI) and other embodiments (the base station configures a terminal with a maximum of N CSI-RS measurement resources, and the terminal decides to report N CRI CSI corresponding to CSI-RS resources, where N≥N CRI, and the terminal informs the base station by reporting CRI that it has selected the CSI corresponding to the CSI-RS resources to be reported), if the number of CRIs indicated by the base station to be reported is the same as the number of configured CSI-RS resources, or the number of CRIs selected for reporting by the terminal is the same as the number of configured CSI-RS resources, then the terminal does not need to report the corresponding CRI; and for other embodiments (the base station configures a maximum of N CSI-RS measurement resources for the terminal, and specifies that the CSI corresponding to one of the CSI-RS resources is reported by default, and then instructs the terminal to report N CRI CSI corresponding to CSI-RS resources, and N ≥ N CRI , the terminal reports N based on the instruction of the base station CRI CSI corresponding to CSI-RS, and report N CRI -1 CSI-RS resource corresponding to the CRI), if the terminal indicates that the number of reports is 1 and specifies which CSI-RS resource it is, the terminal does not need to report the corresponding CRI indication; and for other embodiments (the base station configures a maximum of N (for example, N = 4) CSI-RS measurement resources for the terminal and specifies that the CSI corresponding to one of the CSI-RS resources is reported by default, the terminal decides to report N CRI -CSI corresponding to 1 CSI-RS resource, where N≥N CRI , and the terminal informs the base station by reporting the CRI which CSI corresponding to the CSI-RS resources it has selected to report). If the terminal ultimately decides to report CSI information corresponding to a CRI, it can only be the CSI corresponding to the default CRI specified by the base station. In this case, the terminal does not need to report CRI indication information. Furthermore, if the number of CRIs selected for reporting by the terminal plus the number of CSIs corresponding to the default CRI reported equals the total number of CSI-RSs, the terminal does not need to report the corresponding CRI indication information.

[0185] When the terminal reports CSI corresponding to multiple CSI-RS resources simultaneously, the base station will ultimately select the CSI corresponding to only one of the CSI-RS resources for use. Therefore, in the case of resource constraints, the reporting of CSI corresponding to different CSI-RS resources can be prioritized so that the base station can select the CSI corresponding to the CSI-RS resource based on priority. In some embodiments, the multiple CSIs corresponding to the multiple CSI-RS resources selected for reporting include the multiple CSIs corresponding to the multiple CSI-RS resources selected based on polling reporting. The multiple CSIs corresponding to the multiple CSI-RS resources selected for polling reporting can be reporting all the CSIs of a CSI-RS resource set (including multiple CSI-RS resources) in a certain order and then reporting all the CSIs of another CSI-RS resource set (including multiple CSI-RS resources). For example, when the CSI-RS resource set corresponds to 3 CSIs, the order of the multiple CSIs corresponding to the multiple CSI-RS resources selected based on polling reporting can be CSI1, CSI2, CSI3, CSI1, CSI2, CSI3..., and the order of the multiple CSIs corresponding to the multiple CSI-RS resources selected based on polling reporting can also be CSI2, CSI1, CSI3, CSI2, CSI1, CSI3... In practice, there are two ways to report CSI: one is that the reported CSI does not distinguish between part 1 and part 2, and the other is that the reported CSI distinguishes between part 1 and part 2.

[0186] When the reported CSI does not distinguish between Part 1 and Part 2, the multiple CSIs may be jointly reported based on predefined priority information (i.e., at least one of the channel quality information corresponding to the CSI-RS resource, the rank information of the CSI corresponding to the CSI-RS resource, and the reporting overhead information of the CSI corresponding to the CSI-RS resource) in at least one of the following ways:

[0187] Method 1: Cross-reporting of the CSI corresponding to different CSI-RS resources helps ensure that information is available for the CSI corresponding to each CSI-RS resource, thereby helping the base station make scheduling decisions to improve system performance. The cross-reporting order can be sorted by the beam quality received by the terminal, with priority given to reporting beams / channels with better quality information. For example, the order can be based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. Secondly, in the case where the base station indicates that the CSI corresponding to the CSI-RS resource is reported by default (the CSI includes at least one of PMI, RI, and CQI), the cross-reporting order can be to first report the CSI-RS indicated by default, the CSI corresponding to the resource, and then cross-report according to the quality of the received beam / channel, for example, based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. Furthermore, the size of the CSI reporting overhead of different CSI-RS resources is cross-reported. The terminal can determine the reporting overhead of the CSI corresponding to different CSI-RS resources. The cross-reporting can be done in order of overhead from small to large, or from large to small. This method can ensure that relatively more CSI is available on the base station side and can take into account the integrity of the CSI to a certain extent.

[0188] Method 2: The terminal prioritizes the quality of the received beams / measurement channels and reports the CSI corresponding to the CSI-RS resources with the best beam / channel quality first. For example, the ranking is based on the RSRP / SINR / CQI of the received beams / measurement channels. This reporting method helps ensure that system performance is not significantly affected when reporting resources are limited.

[0189] Method 3: For the CSI of the CSI-RS resource indicated by the base station as reported by default, where the CSI includes at least one of PMI, RI, and CQI, the terminal defaults to the CSI corresponding to the CSI-RS resource as the highest priority when reporting, and then prioritizes it according to the quality of the received beam / measurement channel. For example, the priority is sorted based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. This reporting method helps to ensure the needs of the base station side, and at the same time helps to ensure that the performance of the system will not be greatly affected when the reporting resources are tight.

[0190] Method 4: Since the reporting overhead of CSI corresponding to different CSI-RS resources may vary, in order to ensure that complete CSI is available on the base station side, priority can be given according to the size of the CSI reporting overhead corresponding to the CSI-RS resources. For example, priority can be given to reporting CSI-RS resources corresponding to smaller or larger CSI overheads, which can be determined specifically based on resource constraints. This method helps to ensure that complete CSI information is available on the base station side, and whether to sort by larger overhead or smaller overhead can be determined by the terminal based on specific resource conditions. On the one hand, it helps to better utilize resources, and on the other hand, it also takes into account system performance.

[0191] Method 5: In order to ensure that the base station can adjust more data streams and increase the performance of the system, the rank (i.e., Rank) values ​​of different beams / channels can be reported. For example, the priorities can be sorted from large to small according to the Rank value, and the larger the rank value, the higher the priority; secondly, for beams / channels with the same rank value, they can be sorted according to the quality of the beam / channel. The CSI with good beam / channel quality has a higher priority. For example, the ranking is based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. The larger the RSRP / SINR / CQI, the higher the priority.

[0192] In addition, for the same antenna array, the large-scale variation between the channels corresponding to the beams associated with different CSI-RS resources can be relatively small. In order to reduce the reporting overhead of the terminal, the terminal can report one RI value for multiple CSI-RS resources.

[0193] In some embodiments, when the reported CSI distinguishes between a first part part 1 and a second part part 2, the priority information is applicable to the second part of the CSI, and the multiple CSIs are jointly reported based on predefined priority information (i.e., at least one of the channel quality information corresponding to the CSI-RS resource, the rank information of the CSI corresponding to the CSI-RS resource, and the reporting overhead information of the CSI corresponding to the CSI-RS resource) in at least one of the following ways:

[0194] Method 1: Cross-reporting of the contents of Part 2 corresponding to different CSI-RS resources helps ensure that information is available for the CSI corresponding to each CSI-RS resource, thereby helping the base station make scheduling decisions to improve system performance. The cross-reporting order can be sorted by the quality of the beam received by the terminal, with beams / channels with better quality being reported first. For example, the order can be based on the RSRP / SINR / CQI of the received beam / measurement channel, with the larger the RSRP / SINR / CQI, the higher the priority. Secondly, in the case where the base station indicates that the CSI corresponding to the CSI-RS resource is reported by default (the CSI includes at least one of PMI, RI, and CQI), the cross-reporting order can be to first report Part 2 corresponding to the default CSI-RS resource, and then cross-report according to the quality of the received beam / channel, for example, sorting based on the RSRP / SINR / CQI of the received beam / measurement channel. Furthermore, cross-reporting is performed based on the size of the corresponding part 2 reporting overhead in the CSI of different CSI-RS resources. The terminal can determine the reporting overhead of part 2 in the CSI corresponding to different CSI-RS resources. The cross-reporting can be performed in order of overhead from small to large, or from large to small. This method can ensure that relatively more CSI is available on the base station side and, to a certain extent, can take into account the integrity of the CSI. Finally, the CSI of different CSI-RS resources is sorted by the size of the rank value. The larger the rank value, the higher the priority. For beams / channels with the same rank value, they can be sorted according to the quality of the beam / channel. The part 2 corresponding to the CSI with good beam / channel quality has a higher priority. For example, the sorting is based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. The larger the RSRP / SINR / CQI, the higher the priority.

[0195] Method 2: The terminal prioritizes the quality of the received beams / measurement channels and prioritizes reporting Part 2 of the CSI corresponding to the CSI-RS resource with the best beam / channel quality. For example, the ranking is based on the RSRP / SINR / CQI of the received beams / measurement channels. The larger the RSRP / SINR / CQI, the higher the priority. This reporting method helps ensure that system performance is not significantly affected when reporting resources are limited.

[0196] Method 3: For the CSI of the CSI-RS resource indicated by the base station as reported by default (the CSI includes at least one of PMI, RI, and CQI), the terminal defaults to the highest priority of the PMI of part 2 corresponding to the CSI-RS resource when reporting, and then prioritizes it according to the quality of the received beam / measurement channel. For example, the size of the RSRP / SINR / CQI of the received beam / measurement channel is used for sorting. The larger the RSRP / SINR / CQI, the higher the priority. This reporting method helps to ensure the needs of the base station side, and at the same time helps to ensure that the performance of the system will not be greatly affected when reporting resources are tight.

[0197] Method 4: Since the feedback overhead of CSI corresponding to different CSI-RS resources may be different, in order to ensure that complete CSI is available on the base station side, priority can be given according to the size of the reporting overhead of part 2 in the CSI corresponding to the CSI-RS resource. For example, priority can be given to reporting the part 2 of the CSI corresponding to the CSI-RS resource with smaller or larger overhead, which can be determined specifically based on resource constraints. This method helps to ensure that complete CSI information is available on the base station side, and whether to sort by larger overhead or smaller overhead can be determined by the terminal based on specific resource conditions. On the one hand, it helps to better utilize resources, and on the other hand, it also takes into account system performance.

[0198] Method 5: In order to ensure that the base station can adjust more data streams and increase the performance of the system, it can report according to the size of the Rank value of different beams / channels. For example, the priority can be sorted from large to small according to the Rank value, and the larger the rank value, the higher the priority; secondly, for beams / channels with the same rank value, they can be sorted according to the quality of the beam / channel. The part2 corresponding to the CSI with good beam / channel quality has a higher priority. For example, the ranking is based on the size of the RSRP / SINR / CQI of the received beam / measurement channel. The larger the RSRP / SINR / CQI, the higher the priority.

[0199] In addition, for the same antenna array, the large-scale changes between the channels corresponding to the beams associated with different CSI-RS resources may be relatively small. In order to reduce the reporting overhead of the terminal, the terminal can report one RI value for multiple CSI-RS resources.

[0200] Since the CSI processing unit is used to measure the terminal's CSI processing capability, for traditional Type I and Type II codebooks, when expanded to support a maximum of 128 antenna ports across multiple CSI-RS resources, the requirements for terminal processing capability will inevitably vary. To this end, this disclosure provides a method for calculating the number of CPUs that may be occupied by CSI reporting based on different codebook types.

[0201] In some embodiments, the number of CSI processing units (CPUs) occupied by the multiple CSIs corresponding to the selected multiple CSI-RS resources is determined based on at least one of the following methods: When the reporting quantity in the CSI reporting configuration includes CRI, the codebook type is type one, and the number N of the CSI-RS resources is greater than 1, the number of CPUs is determined based on a first value (equivalent to X in the following text) and N, where the first value is related to the number of ports of the CSI-RS resources; When the reporting quantity in the CSI reporting configuration includes CRI, the codebook type is type one, and the number N of the CSI-RS resources is greater than 1, the number of CPUs is determined based on a first value (equivalent to X in the following text), a second value (equivalent to Y in the following text), and N, where the first value is related to the number of ports of the CSI-RS resources; The second value is related to the number of candidate spatial domain bases configured for each CSI.

[0202] The following uses actual examples to elaborate in detail. For CSI reporting based on CRI under HBF, the number of CPUs occupied by CSI reporting can be at least one of the following methods:

[0203] (1) If the higher-layer parameter reportQuantity under CSI-ReportConfig is configured as 'cri-RI-PMI-CQI', the codebook type is configured as 'typeI-SinglePanel-r19', and the NZP-CSI-RS-ResourceSet for channel measurement contains 1 < N ≤ 4 resources, then O CPU = X·N, where the first value X can take at least one of the following values X ∈ {1, 1.5, 2, 3, 4}, and the value of X is related to the number of ports of the CSI-RS resources. For example, the CSI-RS resource set for channel measurement contains 4 CSI-RS resources, and each resource can have a maximum of 32 antenna ports. In the traditional TypeI configuration, the CSI-RS resource set for channel measurement contains 4 CSI-RS resources, and each resource has a maximum of 8 ports. Therefore, X = 4.

[0204] (2) If the higher-layer parameter reportQuantity under CSI-ReportConfig is configured as 'cri-RI-PMI-CQI', the codebook type is configured as 'typeI-SinglePanel-r19', and the NZP-CSI-RS-ResourceSet for channel measurement contains 1 < N ≤ 4 resources, then O CPU= X·Y·N, where the first value X can take at least one of the following values X ∈ {1, 1.5, 2, 3, 4}, and the value of X is related to the number of ports of the CSI-RS resource. For example, in the CSI-RS resource set for channel measurement, there are 4 CSI-RS resources, and each resource can have a maximum of 32 antenna ports. Under the traditional Type I configuration, in the CSI-RS resource set for channel measurement, there are 4 CSI-RS resources, and each resource has a maximum of 8 ports. Therefore, X = 4. The value of the second value Y depends on the possible number of configured spatial bases. If the possible number of candidate values for the number of spatial beams corresponding to each CSI-RS resource is 1, then Y = 1. If there are multiple possible candidate values for the number of spatial beams corresponding to each CSI-RS resource, then Y can take multiple values, and the values of X and Y are reported through the UE's capability indication.

[0205] In some embodiments, for the type II related codebook, the number of CPUs occupied by CSI reporting can be at least one of the following ways:

[0206] (1) If the higher layer parameter reportQuantity under CSI-ReportConfig is configured as 'RI-PMI-CQI', and the codebook type is configured as 'typeII-r19' / 'typeII-PortSelection-r19' / 'etypeII-r19' / 'etypeII-PortSelection-r19' / 'FetypeII-PortSelection-r19', and the NZP-CSI-RS-ResourceSet for channel measurement contains 1 < N ≤ 4 resources, then O CPU = N.

[0207] (2) If the higher layer parameter reportQuantity under CSI-ReportConfig is configured as 'RI-PMI-CQI', and the codebook type is configured as 'typeII-r19' / 'typeII-PortSelection-r19' / 'etypeII-r19' / 'etypeII-PortSelection-r19' / 'FetypeII-PortSelection-r19', and the NZP-CSI-RS-ResourceSet for channel measurement contains 1 < N ≤ 4 resources, then O CPU = X·N, where X can take at least one of the following values X ∈ {1, 1.5, 2, 3}, and the value of X is related to the number of candidate spatial beams / spatial bases configured for CSI calculation corresponding to each CSI-RS resource, and the value of X is reported through the UE's capability indication.

[0208] (3) If the high-level parameter reportQuantity under CSI-ReportConfig is configured as 'RI-PMI-CQI' and the codebook type is configured as 'etypeII-doopler-r19' / 'FetypeII-doopler-PortSelection-r19', then in the original O CPU The number of CSI-RS resources included in the CSI-RS resource group is further multiplied by .

[0209] In some embodiments, for massive MIMO antenna arrays, increasing the number of RF chains while maintaining the same number of antenna elements can help improve the spatial freedom of the antenna array. Furthermore, increasing both the number of RF chains and the number of antenna elements can help improve the spatial freedom and angular resolution of beamforming, as beamwidth is related to the aperture of the antenna array.

[0210] For the existing Type-I codebook, when the number of antenna ports is greater than 4 and rank = 1 or 2, the number of beams L selected by the UE is configurable: L∈{1,4}. With the increase in spatial degrees of freedom and improved beam angular resolution, to improve beamforming accuracy, this embodiment considers it necessary to increase the number of beams in a beam group. The number of beams in a beam group can be at least one of the following L∈{1,4,6,8,12,16,24}, and the beam patterns of different beam groups may vary depending on the number of beams contained in the beam group. Furthermore, considering the increase in the number of antenna ports in the vertical latitude, the vertical latitude provides more spatial degrees of freedom. Therefore, to improve the accuracy of the selected vertical latitude beam, it may be necessary to increase the number of vertical latitude beams when the number of beams in the beam group is fixed.

[0211] For example, first, for L=6, the beam patterns corresponding to the beam groups can be the following (where d1 and d2 distributions represent the angular resolutions corresponding to the beam pointing in the vertical and horizontal dimensions):

[0212] (1) If N2>1, the 2D antenna port distribution is shown in Figure 5.

[0213] (2) If N2=1, the 1-dimensional antenna port distribution is shown in FIG6 .

[0214] 2. For L=8, the beam patterns corresponding to the beam groups can be the following:

[0215] (1) If N2>1, the 2D antenna port distribution is shown in Figure 7.

[0216] (2) If N2=1, the 1-dimensional antenna port distribution is shown in FIG8 .

[0217] 3. For L = 12, the beam patterns corresponding to the beam groups can be the following:

[0218] (1) If N2>1, the 2D antenna port distribution is shown in Figure 9.

[0219] (2) If N2=1, the 1-dimensional antenna port distribution is shown in FIG10 .

[0220] (3) If N2>2 or N2>3, the 2D antenna port distribution is shown in Figure 11.

[0221] 4. For L=16, the beam patterns corresponding to the beam groups can be the following:

[0222] (1) If N2>1, the 2D antenna port distribution is shown in Figure 12.

[0223] (2) If N2=1, the 1-dimensional antenna port distribution is shown in FIG13 .

[0224] (3) If N2>3, the 2D antenna port distribution is shown in Figure 14.

[0225] It is worth noting that the dark square in the figure represents a beam.

[0226] This document describes a method for reporting channel state information, applicable, for example, to communications between a user equipment terminal (UE) and a base station. However, these inventive concepts, methods, apparatuses, devices, computer-readable storage media, chips, and computer program products are not limited to NR 5G communication systems and can be extended to other communication scenarios to achieve the same technical benefits and effects.

[0227] In these scalable communication scenarios, a UE refers to a device used for communication at the user end, such as a mobile phone. It can also be called a terminal, mobile station, or mobile terminal. A UE can be a variety of devices, including but not limited to mobile phones, tablets, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals for industrial control, wireless terminals for autonomous driving, wireless terminals for remote medical surgery, wireless terminals for smart grids, wireless terminals for environmental monitoring, wireless terminals for smart cities, and wireless terminals for smart homes.

[0228] Furthermore, UEs and base stations can be deployed in different environments, including but not limited to indoors, outdoors, as handheld devices, in vehicles, or even on water, in the air, on airplanes, drones, or satellites.

[0229] Therefore, while this document describes methods and devices for channel state information reporting, the inventive concepts and technologies herein can be extended to other communication scenarios and are expected to achieve the same technical benefits and effects. It is readily apparent that these inventive concepts have broad applicability and scalability, whether in communications between different types of base stations and user equipment, or in different deployment environments.

[0230] It should be noted that the above steps are merely examples and do not limit the scope of the present invention. Various modifications and variations can be made to the steps without departing from the spirit and scope of the present invention.

[0231] The order of the described steps (signaling / boxes) is not intended to be construed as a limitation, and any number of the described steps (signaling / boxes) may be skipped or combined in any order to implement a method or an alternative method.

[0232] The present disclosure describes examples of communication between terminals and network element components in a network architecture in the above embodiments, which are mainly for illustrative purposes and not restrictive.

[0233] The order of the steps (signaling / boxes) described is not intended to be interpreted as limiting, and any number of the steps (signaling / boxes) described can be skipped or combined in any order to implement a method or alternative method. Typically, any of the components, modules, methods, and operations described herein can be implemented using software, firmware, hardware (e.g., fixed logic circuitry), manual processing, or any combination thereof. Some operations of the example methods can be described in the general context of executable instructions stored on a computer-readable memory locally and / or remotely on a computer processing system, and implementation methods can include software applications, programs, functions, and the like. Alternatively or in addition, any function described herein can be performed, at least in part, by one or more hardware logic components, such as, but not limited to, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), an application specific standard product (ASSP), a system on a chip (SoC), a complex programmable logic device (CPLD), and the like.

[0234] In addition, the signaling described in the embodiments of the present disclosure can be implemented in any manner known in the art. For example, the signaling can be explicit and / or implicit. In addition, the steps (signaling / frames) shown are for illustrative purposes only and are not intended to limit the present application.

[0235] FIG15 is a schematic structural diagram of a wireless communication device 900 provided by the present disclosure. The wireless communication device includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and perform the following operations:

[0236] receiving configuration information sent by a base station, wherein the configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information (CSI) reporting, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold;

[0237] Based on the configuration information, the multiple CSIs are jointly reported; wherein the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameters; the same layer of each CSI corresponds to the same spatial basis or antenna port. Or

[0238] Receive configuration information sent by the base station, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported;

[0239] Based on the configuration information, multiple CSIs corresponding to the selected multiple CSI-RS resources are reported, and the reporting amount corresponding to the CSI includes the channel state information reference signal resource indication CRI. The multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

[0240] or

[0241] Sending configuration information, wherein the configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information (CSI) reporting, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold;

[0242] The multiple CSIs reported jointly are received, wherein the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; and the same layer of each CSI corresponds to the same spatial basis or antenna port.

[0243] or

[0244] Sending configuration information, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported;

[0245] Receive multiple CSIs corresponding to multiple selected CSI-RS resources, where the reporting amount corresponding to the CSI includes a channel state information reference signal resource indication CRI, and the multiple CSIs are jointly reported based on predefined priority information, where the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

[0246] The wireless communication device may be a user device, a base station, or a network element. The wireless communication device 900 shown in FIG15 includes a processor 910. The processor 910 may call and run a computer program from a memory to implement the method in an embodiment of the present application.

[0247] Optionally, as shown in FIG15 , the wireless communication device 900 may further include a memory 920. The processor 910 may call and execute a computer program from the memory 920 to implement the method in the embodiment of the present application. The memory 920 may be a separate device independent of the processor 910 or may be integrated into the processor 910.

[0248] Optionally, as shown in FIG15 , the wireless communication device 900 may further include a transceiver 930. The processor 910 may control the transceiver 930 to communicate with other devices. Specifically, the transceiver 930 may send information or data to other devices or receive information or data sent by other devices. The transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include one or more antennas.

[0249] Optionally, the wireless communication device 900 may specifically be a base station in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the base station in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0250] Optionally, the wireless communication device 900 may specifically be a mobile user device / user device in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the mobile user device / user device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0251] Optionally, the wireless communication device 900 may specifically be a network element in an embodiment of the present application, and the wireless communication device 900 may implement the corresponding processes implemented by the network element in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0252] According to an example embodiment, a chip is provided, comprising: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes a method according to any one of the above embodiments, examples, or exemplary embodiments.

[0253] According to an example embodiment, there is provided a computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute a method according to any one of the above-mentioned embodiments, examples, or exemplary embodiments.

[0254] According to an example embodiment, a computer program product is provided, comprising a computer program / instruction, which, when executed by a processor (e.g., by the processor or an apparatus, device, computer or machine including the processor), implements a method according to any one of the above-mentioned embodiments, examples, or example embodiments.

[0255] The embodiments of the present disclosure are a combination of techniques / processes that may be employed in 3GPP specifications to create a final product.

[0256] While the present disclosure has been described in connection with what is considered to be the most practical and preferred embodiment, it is to be understood that the disclosure is not limited to the disclosed embodiment, but is intended to cover various arrangements embodied within the broadest interpretation of the appended claims.

Claims

1. A method for reporting channel state information, executed by a terminal, the method comprising: receiving configuration information sent by a base station, wherein the configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information (CSI) reporting, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold; Based on the configuration information, the multiple CSIs are jointly reported; wherein the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; and the same layer of each CSI corresponds to the same spatial basis or antenna port.

2. The method according to claim 1, wherein The predefined threshold is 32, and a plurality of the CSI-RS resources are used for channel measurement.

3. The method according to any one of claims 1 to 2, wherein: The method further includes constraining multiple CSI-RS resources located in the same CSI-RS resource set.

4. The method according to claim 3, wherein: The constraint includes that the multiple CSI-RS resources are of the same type.

5. The method according to claim 3, wherein The constraint further includes: the number of antenna ports corresponding to the plurality of CSI-RS resources is the same, and the distribution of the antenna ports corresponding to the number of antenna ports is the same.

6. The method according to any one of claims 1 to 3, wherein: The configuration information used for the CSI reporting is constrained, where the constraint includes that the PMI information in the channel state information CSI is determined based on the same antenna port oversampling group.

7. The method according to any one of claims 1 to 3, wherein: When the reported amount corresponding to the channel state information CSI includes CRI, the constraints include: When the number of the CSI-RS resources is 2, the number of antenna ports corresponding to each of the CSI-RS resources is at least 16.

8. The method according to any one of claims 1 to 3, wherein: When the reported amount corresponding to the channel state information CSI includes CRI, the constraints include: When the number of the CSI-RS resources is 3, the number of antenna ports corresponding to each of the CSI-RS resources is at least 12.

9. The method according to any one of claims 1 to 3, wherein: When the reported amount corresponding to the channel state information CSI includes CRI and the codebook type is type 1, the constraints include: When the number of the CSI-RS resources is greater than 3 and the number of the CSI-RS resources is less than or equal to 8, the number of antenna ports corresponding to each of the CSI-RS resources is at least 8.

10. The method according to any one of claims 6 to 9, wherein: The constraints also include: The number of antenna ports corresponding to the multiple CSI-RS resources is the same, and the distribution of the antenna ports corresponding to the number of antenna ports is the same.

11. The method according to any one of claims 6 to 10, wherein: The configuration information used for the CSI reporting is constrained, where the constraint includes that the PMI information in the channel state information CSI is determined based on the same antenna port oversampling group.

12. The method according to any one of claims 1 to 11, wherein: The distribution of total antenna ports corresponding to all CSI-RS resources is indicated by n1-n2 parameters, wherein the n1-n2 parameters are determined based on the distribution of the total antenna ports.

13. The method according to any one of claims 1 to 12, wherein: The distribution of the total antenna ports corresponding to all CSI-RS resources is represented by the distribution of multiple antenna port groups, where the antenna port group is the antenna port corresponding to each CSI-RS resource, wherein the distribution of the multiple antenna port groups indicates the distribution of the multiple antenna port groups in the horizontal direction and the vertical direction.

14. The method according to claim 1, wherein The multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations, including: The plurality of CSIs are combined into a joint CSI; The joint CSI is determined based on a set of codebook parameter combinations in a codebook parameter combination list, wherein the codebook parameter combination list includes multiple sets of codebook parameter combinations.

15. The method according to claim 1 or 14, wherein: The codebook parameter combination is indicated by a codebook parameter combination indicator.

16. The method according to claim 14, wherein When a plurality of the CSIs correspond to the same spatial basis or antenna port, the same layer in the precoding matrix indicators PMIs corresponding to the respective CSIs is determined based on the same spatial basis or antenna port.

17. The method according to claim 1 or 16, wherein Precoding matrix indicators (PMIs) corresponding to the multiple CSIs are determined based on the same number of non-zero coefficients.

18. The method according to claim 17, wherein The non-zero coefficients of the same layer in each of the CSIs are determined based on the same position.

19. A method for reporting channel state information, executed by a terminal, the method comprising: Receive configuration information sent by the base station, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported; Based on the configuration information, multiple CSIs corresponding to the selected multiple CSI-RS resources are reported, and the reporting amount corresponding to the CSI includes the channel state information reference signal resource indication CRI. The multiple CSIs are jointly reported based on predefined priority information, and the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

20. The method according to claim 19, wherein The number n1 is less than or equal to the number n2 of the CSI-RS resources, and the reporting, based on the configuration information, of the multiple CSIs corresponding to the multiple CSI-RS resources selected includes: Report the n1 CSIs indicated in the configuration information.

21. The method according to claim 19, wherein The number n1 is less than or equal to n2, the configuration information further includes reporting a CSI corresponding to the configured CSI-RS resource, the number of CRIs is n1-1, and the reporting, based on the configuration information, of the multiple CSIs corresponding to the multiple CSI-RS resources selected includes: Reporting n1 CSIs indicated in the configuration information, wherein the CSIs include a CSI corresponding to the configured CSI-RS resource.

22. The method according to claim 19, wherein The number n1 is less than or equal to n2, the configuration information further includes reporting a CSI corresponding to the configured CSI-RS resource, the number of CRIs is n1-1, and the reporting, based on the configuration information, of the multiple CSIs corresponding to the multiple CSI-RS resources selected includes: Reporting a CSI corresponding to the configured CSI-RS resource and / or CSI corresponding to the selected n3 CSI-RS resources included in the configuration information.

23. The method according to claim 19, wherein The manner of reporting the multiple CSIs corresponding to the multiple selected CSI-RS resources based on the configuration information includes at least one of the following: Reporting the multiple CSIs corresponding to the multiple selected CSI-RS resources based on a bitmap; and The multiple CSIs corresponding to the selected multiple CSI-RS resources are reported based on the number of combinations.

24. The method according to claim 19, wherein The multiple CSIs corresponding to the multiple CSI-RS resources selected for reporting include the multiple CSIs corresponding to the multiple CSI-RS resources selected based on polling reporting.

25. The method according to claim 19 or 24, wherein When the CSI includes a first part and a second part, the priority information is applicable to the second part of the CSI.

26. The method according to claim 19, wherein The number of CSI processing unit CPUs occupied by the multiple CSIs corresponding to the multiple CSI-RS resources selected for reporting is determined based on at least one of the following methods: When the reporting amount of the CSI reporting configuration includes CRI, the codebook type is type 1, and the number N of the CSI-RS resources is greater than 1, the number of the CPUs is determined based on a first value and N, wherein the first value is related to the number of ports of the CSI-RS resources; When the reporting amount of the CSI reporting configuration includes CRI, the codebook type is type 1, and the number N of the CSI-RS resources is greater than 1, the number of CPUs is determined based on the first value, the second value, and N, wherein the first value is related to the number of ports of the CSI-RS resources; the second value is related to the number of candidate spatial bases for each CSI configuration.

27. A method for reporting channel state information, executed by a base station, the method comprising: Sending configuration information, wherein the configuration information includes configuration information of multiple CSI-RS resources and configuration information for channel state information (CSI) reporting, and a total number of antenna ports corresponding to the multiple CSI-RS resources is greater than a predefined threshold; The multiple CSIs reported jointly are received, wherein the multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations; and the same layer of each CSI corresponds to the same spatial basis or antenna port.

28. The method according to claim 27, wherein The predefined threshold is 32, and a plurality of the CSI-RS resources are used for channel measurement.

29. The method according to any one of claims 27-28, wherein: The method further includes constraining multiple CSI-RS resources located in the same CSI-RS resource set.

30. The method according to claim 29, wherein The constraint includes that the multiple CSI-RS resources are of the same type.

31. The method according to any one of claims 29, wherein: The constraint further includes: the number of antenna ports corresponding to the plurality of CSI-RS resources is the same, and the distribution of the antenna ports corresponding to the number of antenna ports is the same.

32. The method according to any one of claims 27 to 31, wherein: The configuration information used for the CSI reporting is constrained, where the constraint includes that the PMI information in the channel state information CSI is determined based on the same antenna port oversampling group.

33. The method according to any one of claims 27 to 31, wherein: When the reported amount corresponding to the channel state information CSI includes CRI, the constraints include: When the number of the CSI-RS resources is 2, the number of antenna ports corresponding to each of the CSI-RS resources is at least 16.

34. The method according to any one of claims 27 to 31, wherein: When the reported amount corresponding to the channel state information CSI includes CRI, the constraints include: When the number of the CSI-RS resources is 3, the number of antenna ports corresponding to each of the CSI-RS resources is at least 12.

35. The method according to any one of claims 27 to 31, wherein: When the reported amount corresponding to the channel state information CSI includes CRI, the constraints include: When the number of the CSI-RS resources is greater than 3 and the number of the CSI-RS resources is less than or equal to 8, the number of antenna ports corresponding to each of the CSI-RS resources is at least 8.

36. The method according to any one of claims 32 to 35, wherein: The constraints also include: The number of antenna ports corresponding to the multiple CSI-RS resources is the same, and the distribution of the antenna ports corresponding to the number of antenna ports is the same.

37. The method according to any one of claims 32 to 36, wherein: The configuration information used for the CSI reporting is constrained, where the constraint includes that the PMI information in the channel state information CSI is determined based on the same antenna port oversampling group.

38. The method according to any one of claims 32 to 37, wherein: The distribution of total antenna ports corresponding to all CSI-RS resources is indicated by n1-n2 parameters, wherein the n1-n2 parameters are determined based on the distribution of the total antenna ports.

39. The method according to any one of claims 27 to 38, wherein: The distribution of the total antenna ports corresponding to all CSI-RS resources is represented by the distribution of multiple antenna port groups, where the antenna port group is the antenna port corresponding to each CSI-RS resource, wherein the distribution of the multiple antenna port groups indicates the distribution of the multiple antenna port groups in the horizontal direction and the vertical direction.

40. The method of claim 27, wherein The multiple CSIs corresponding to the multiple CSI-RS resources are determined based on the same set of codebook parameter combinations, including: The plurality of CSIs are combined into a joint CSI; The joint CSI is determined based on a set of codebook parameter combinations in a codebook parameter combination list, wherein the codebook parameter combination list includes multiple sets of codebook parameter combinations.

41. The method according to claim 27 or 40, wherein The codebook parameter combination is indicated by a codebook parameter combination indicator.

42. The method of claim 40, wherein: When a plurality of the CSIs correspond to the same spatial basis or antenna port, the same layer in the precoding matrix indicators PMIs corresponding to the respective CSIs is determined based on the same spatial basis or antenna port.

43. The method according to claim 27 or 42, wherein Precoding matrix indicators (PMIs) corresponding to the multiple CSIs are determined based on the same number of non-zero coefficients.

44. The method according to claim 43, wherein The non-zero coefficients of the same layer in each of the CSIs are determined based on the same position.

45. A method for reporting channel state information, executed by a base station, the method comprising: Sending configuration information, where the configuration information is used to indicate the number n1 of channel state information CSI to be reported; Receive multiple CSIs corresponding to multiple selected CSI-RS resources, where the reporting amount corresponding to the CSI includes a channel state information reference signal resource indication CRI, and the multiple CSIs are jointly reported based on predefined priority information, where the priority information includes at least one of the following: channel quality information corresponding to the CSI-RS resources, rank information of the CSI corresponding to the CSI-RS resources, and reporting overhead information of the CSI corresponding to the CSI-RS resources.

46. ​​The method of claim 45, wherein The number n1 is less than or equal to the number n2 of the CSI-RS resources, and the multiple CSIs corresponding to the multiple CSI-RS resources selected by the receiving include: Receive n1 CSIs indicated in the configuration information.

47. The method of claim 45, wherein The number n1 is less than or equal to n2, the configuration information further includes reporting a CSI corresponding to the configured CSI-RS resource, the number of the CRI is n1-1, and the multiple CSIs corresponding to the multiple CSI-RS resources selected for receiving include: Receive n1 CSIs indicated in the configuration information, where the CSIs include a CSI corresponding to a configured CSI-RS resource.

48. The method of claim 45, wherein The number n1 is less than or equal to n2, the configuration information further includes reporting a CSI corresponding to the configured CSI-RS resource, the number of the CRI is n1-1, and the multiple CSIs corresponding to the multiple CSI-RS resources selected for receiving include: Receive a CSI corresponding to the configured CSI-RS resource and / or CSI corresponding to n3 CSI-RS resources selected by the terminal, included in the configuration information.

49. The method of claim 45, wherein The manner of receiving the plurality of CSIs corresponding to the selected plurality of CSI-RS resources includes at least one of the following: Receiving the plurality of CSIs corresponding to the plurality of selected CSI-RS resources based on a bitmap manner; and The multiple CSIs corresponding to the selected multiple CSI-RS resources are received based on the number of combinations.

50. The method of claim 45, wherein The receiving of the plurality of CSIs corresponding to the plurality of selected CSI-RS resources includes receiving the plurality of CSIs corresponding to the plurality of selected CSI-RS resources based on polling.

51. The method according to claim 45 or 50, wherein When the CSI includes a first part and a second part, the priority information is applicable to the second part of the CSI.

52. The method of claim 45, wherein The number of CSI processing unit CPUs occupied by the multiple CSIs corresponding to the received selected multiple CSI-RS resources is determined based on at least one of the following methods: When the reporting amount of the CSI reporting configuration includes CRI, the codebook type is type 1, and the number N of the CSI-RS resources is greater than 1, the number of the CPUs is determined based on a first value and N, wherein the first value is related to the number of ports of the CSI-RS resources; When the reporting amount of the CSI reporting configuration includes CRI, the codebook type is type 1, and the number N of the CSI-RS resources is greater than 1, the number of CPUs is determined based on the first value, the second value, and N, wherein the first value is related to the number of ports of the CSI-RS resources; the second value is related to the number of candidate spatial bases for each CSI configuration.

53. A wireless communication device, wherein: The wireless communication device includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 52.

Images