Codebook enhancements for precoding matrix indicator reporting

Abstract

Systems, methods, and devices for wireless communication are described. A method of wireless communication includes receiving, by a wireless device, configuration signaling. The method also includes determining, by the wireless device, a precoding matrix indicator (PMI), where the PMI is based on a codebook indicated by the configuration signaling and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports of a network device. The method also includes transmitting, by the wireless device, the PMI. In some embodiments, the method includes configuration of oversampling factors, configuration of codebook subset restriction, selection of a spatial domain (SD) / frequency domain (FD) basis, non-zero coefficient indication, and non-zero coefficient quantization.

Description

Technical Field

[0001] This patent document generally relates to wireless communication. Background Technology

[0002] Mobile communication technologies are propelling the world toward an increasingly interconnected and networked society. Compared to existing wireless networks, next-generation systems and wireless communication technologies will need to support a wider range of use case characteristics and provide more complex and granular access requirements and flexibility.

[0003] LTE (Long Term Evolution) is a wireless communication standard for mobile devices and data terminals developed by the 3rd Generation Partnership Project (3GPP). LTE-Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The fifth-generation wireless system, known as 5G, advances the LTE and LTE-A wireless standards and aims to support higher data rates, massive connectivity, ultra-low latency, high reliability, and other emerging service requirements. Summary of the Invention

[0004] Techniques for determining a precoding matrix indicator (PMI) corresponding to a precoding matrix applicable to more than 32 antenna ports of a base station (BS) are disclosed. The PMI can be based on a codebook indicated by configuration signaling received from the BS. More specifically, techniques for configuring oversampling factors, configuring codebook subset restrictions, spatial (SD) / frequency (FD) basis selection, non-zero coefficient indication, and non-zero coefficient quantization are disclosed.

[0005] A first example wireless communication method includes receiving configuration signaling by a wireless device. The method further includes determining a precoding matrix indicator (PMI) by the wireless device, wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports of the network device. The method also includes transmitting the PMI by the wireless device.

[0006] The second example wireless communication method includes a network device having more than 32 antenna ports transmitting configuration signaling. The method also includes the network device receiving a precoding matrix indicator (PMI), wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix applicable to the network device having more than 32 antenna ports.

[0007] In another example embodiment, a device configured or operable to perform the methods described above is disclosed. The device includes at least one processor configured to implement the methods described above.

[0008] In another example embodiment, the above method is embodied in processor-executable code and stored in a non-transitory computer-readable storage medium. When executed by a processor, the code included in the computer-readable storage medium causes the processor to implement the method described in this patent document.

[0009] The above and other aspects, and their implementations, are described in more detail in the drawings, description and claims. Attached Figure Description

[0010] Figures 1 to 4 An example of the relationship between bits and spatial domain (SD) basis is illustrated.

[0011] Figure 5 The illustration shows an example of the association between the SD base indicator and the SD base.

[0012] Figures 6 to 8 An example of a non-zero coefficient indication is shown in the illustration.

[0013] Figure 9 and Figure 10 An example of an amplitude quantization scheme is illustrated.

[0014] Figure 11 and Figure 12 An example of a phase quantization scheme is illustrated.

[0015] Figure 13 This is a sample flowchart for determining the Precoding Matrix Indicator (PMI).

[0016] Figure 14 This is a sample flowchart for receiving PMI.

[0017] Figure 15 The diagram illustrates an example block diagram of a hardware platform that may be part of a network device or a wireless device.

[0018] Figure 16 The illustration shows example wireless communications including a base station (BS) and a user equipment (UE) based on some implementations of the disclosed technology. Detailed Implementation

[0019] The example headings in the following sections are provided for ease of understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Therefore, one or more features of one example section may be combined with one or more features of another example section. Furthermore, for clarity, the term "5G" is used; however, the technologies disclosed in this document are not limited to 5G technology and can be used in wireless systems implementing other protocols.

[0020] I. Introduction

[0021] This patent document describes how a wireless device determines a precoding matrix indicator (PMI) corresponding to a precoding matrix applicable to more than 32 antenna ports of a network device.

[0022] To achieve higher downlink (DL) throughput and wider coverage, base stations (BSs) need to be equipped with an increasing number of antenna ports, such as 64 or 128 ports. In frequency division duplex (FDD) systems, user equipment (UEs) need to report a precoding matrix indicator (PMI) to indicate the DL precoding matrix. PMI reporting is based on a predefined codebook. In current industry specifications, the codebook is designed for PMI reporting with 32 or fewer BS antenna ports. In this patent document, we provide a codebook enhancement method to support PMI reporting with more than 32 BS antenna ports. Specifically, the method includes the following embodiments:

[0023] Example 1: Configuration of the oversampling factor

[0024] Example 2: Configuration of codebook subset restrictions

[0025] Example 3: Spatial Domain (SD) / Frequency Domain (FD) Basis Selection

[0026] Example 4: Non-zero coefficient indication

[0027] Example 5: Quantization of Non-zero Coefficients

[0028] PMI reporting is based on predefined codebooks. Prior to Rel-17, the specification provided seven codebooks: Type I single-board, Type I multi-board, Type II, Type II port selection, Enhanced Type II, Enhanced Type III port selection, and Further Enhanced Type II port selection codebooks, defined in sections 5.2.2.2.1 to 5.2.2.2.7, respectively. These codebooks are suitable for different use cases, but they all only support up to 32 antenna ports. If we directly increase the number of antenna ports supported by these codebooks, the PMI reporting overhead will increase significantly due to the increased dimension of the precoding matrix. Simultaneously, DL precoding performance cannot be guaranteed due to the lack of optimization for more than 32 antenna ports. In this patent document, we provide a codebook enhancement method to support PMI reporting with more than 32 antenna ports. DL precoding performance is guaranteed by reducing PMI reporting overhead.

[0029] First, we will explain some of the terms used in the patent documents.

[0030] The following terms are explained in this patent document.

[0031] "UE" can be equated with wireless communication device.

[0032] “BS” can be equivalent to Next Generation Node B (gNB), wireless network equipment, or Transmitter Receiver Point (TRP).

[0033] "Antenna port" can be equivalent to "BS antenna port" or "Channel State Information Reference Signal (CSI-RS) antenna port".

[0034] "High-level parameters" can be equated with "Radio Resource Control (RRC) parameters".

[0035] and Corresponding spatial (SD) base and Defined in Clause 5.2.2.2.1 of TS 38.214, as follows:

[0036]

[0037]

[0038]

[0039] in N 1. N 2 is defined in Clause 5.2.2.2.1 of TS 38.214 as the number of antenna ports. P =2 N 1 N 2, O 1. O 2 is the oversampling factor defined in clause 5.2.2.2.1 of TS38.214.

[0040] With layers l of The corresponding frequency domain (FD) basis is defined in Clause 5.2.2.2.5 of TS 38.214, as follows:

[0041] ,

[0042] in , N 3 represents the total number of precoding matrices. M v The number of selected FD bases. l It is a layer index.

[0043] - "Amplitude" can be equivalent to "amplitude coefficient" or "coefficient amplitude".

[0044] The general process for PMI reporting is as follows:

[0045] - The UE receives configuration signaling and CSI-RS from the BS;

[0046] - The UE determines the PMI based on configuration signaling and CSI-RS, where the PMI is based on the codebook indicated by the configuration signaling and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports;

[0047] - The UE sends a PMI to the BS.

[0048] II. Example 1

[0049] This embodiment involves the configuration of the oversampling factor.

[0050] The precoding matrix indicated by PMI consists of a pair of oversampling factors. O 1 and O 2. Confirmed. When N 1>16、 N 2>16 or the number of antenna ports P >32 hours:

[0051] - Oversampling factor, based on one of the following options O 1 can be made by N 1. Confirmed:

[0052] When 16< N When 1≤32, O 1 = 4; when 32 < N When 1≤64, O 1 = 2; when 64 < N At 1 o'clock, O 1 = 1;

[0053] When 16< N When 1≤32, O 1 = 2; when 32 < N At 1 o'clock, O 1 = 1;

[0054] When 16< N When 1≤64, O 1 = 2; when 64 < N At 1 o'clock, O 1 = 1.

[0055] - Oversampling factor, based on one of the following options O 2 can be derived from N 2. Confirmed:

[0056] When 16< N When 2≤32, O 2 = 4; when 32 < N When 2≤64, O 2=2; when 64< N At 2 o'clock, O 2 = 1;

[0057] When 16< N When 2≤32, O 2=2; when 32< N At 2 o'clock, O 2 = 1;

[0058] When 16< N When 2≤64, O 2=2; when 64< N At 2 o'clock, O 2 = 1.

[0059] - Oversampling factor, based on one of the following options O 1 or O 2 can be determined by the number of antenna ports. P Sure:

[0060] When 32< P When ≤64, O 1 = 4; when 64 < P When ≤128, O 1 = 2; when 128 < P hour, O 1 = 1;

[0061] When 32< P When ≤64, O 1 = 2; when 64 < P hour, O 1 = 1;

[0062] When 32< P When ≤128, O 1 = 2; when 128 < P hour, O 1 = 1;

[0063] When 32< P When ≤64, O 2 = 4; when 64 < P When ≤128, O 2=2; when 128< P hour O 2 = 1;

[0064] When 32< P When ≤64, O 2=2; when 64< P hour, O 2 = 1;

[0065] When 32< P When ≤128, O 2=2; when 128< P hour, O 2 = 1.

[0066] - Oversampling factor O 1 can be made by N 1 and the number of antenna ports P Sure.

[0067] - Oversampling factor O 2 can be derived from N 2 and the number of antenna ports P Sure.

[0068] III. Example 2

[0069] This embodiment involves the configuration of codebook subset restrictions.

[0070] Configuration signaling may include bit sequences ... , This bit sequence indicates which precoding matrices the reported PMI is not allowed to correspond to, where It is the least significant bit (LSB). It is the most significant bit (MSB).

[0071] - A c It can be equal to N 1 O 1 N 2 O 2 / X 1 / X 2, of which X 1 and X 2 is two integers, and N 1 O 1 and N 2 O 2 can be respectively X 1 and X Divisible by 2. If A c Each bit in the bits is associated with one or more SD bases, then when A c When one bit in a set of bits is set to zero, the reported PMI is not allowed to correspond to a precoding matrix based on any SD basis associated with the zero bit. If A c If multiple bits in a set of bits are associated with a base, then when any one of the multiple bits is set to zero, the reported PMI is not allowed to correspond to a precoding matrix based on any SD base associated with the zero bit.

[0072] If the precoding matrix corresponding to PMI is based on SD base Then bits ( , It can be used with SD base ( , Related to, such as Figure 1 As shown. Figure 1 High-level parameters are shown n1-n2 or ng-n1-n2 The bits and SD base included The relationship between them.

[0073] If the precoding matrix corresponding to PMI is based on SD base ,and X 1=1, X 2=2, then bits and ( , ) and SD base Related;

[0074] If the precoding matrix corresponding to PMI is based on SD base ,and X 1=2, X 2=1, then bits and ( , ) and SD base Related.

[0075] If the precoding matrix corresponding to PMI is based on SD base ,and X 1= X 2=2, then bits ( , ) and SD base Related.

[0076] If the precoding matrix corresponding to PMI is based on SD base ,and X 1>2, X If 2>2, then ( , ) and SD base ( , (related to)

[0077] Choose one of the following options X The value of 1 can be determined by N 1. O 1 or N 1 O At least one of 1 is determined:

[0078] When 16< N When 1≤32, X 1 = 2; when 32 < N When 1≤64, X 1 = 4; when 64 < N At 1 o'clock, X 1 = 8;

[0079] When 16< N When 1≤32, X 1 = 1; when 32 < N When 1≤64, X 1 = 2; when 64 < N At 1 o'clock, X 1 = 4;

[0080] When 16< N When 1≤32, X 1 = 2; when 32 < N When 1≤64, X 1 = 2; when 64 < N At 1 o'clock, X 1 = 4.

[0081] Choose one of the following options X The value of 2 can be obtained from N 2. O 2, or N 2 O At least one of 2 is determined:

[0082] When 16< N When 2≤32, X 2=2; when 32< N When 2≤64, X 2 = 4; when 64 < N At 2 o'clock, X 2 = 8;

[0083] When 16< N When 2≤32, X 2 = 1; when 32 < N When 2≤64, X 2=2; when 64< N At 2 o'clock, X 2 = 4;

[0084] When 16< N When 2≤32, X 2=2; when 32< N When 2≤64, X 2=2; when 64< N At 2 o'clock, X 2 = 4.

[0085] If the precoding matrix corresponding to PMI is based on SD base Then with that bit ( , The associated SD base can be derived from y 1. y 2. X 1. X 2. c 1. and c 2. Determined, among which c 1 and c 2 represents two integers representing two comb values. N 1 O 1 and N 2 O 2 can be respectively X 1 c 1 and X 1 c Divisible by 2.

[0086] Bit ( , ) and SD base Related. Figure 2 An example is given, where X 1= X 2=2 and c 1= c 2=2. Figure 2 High-level parameters are shown n1-n2 or ng-n1-n2 The bits and SD base included Examples of relationships between them, where X 1= X 2=2, and c 1= c 2=2.

[0087] As mentioned above, X The value of 1 can be determined by N 1. O 1 or N 1 O At least one of 1 is determined.

[0088] As mentioned above, X The value of 2 can be obtained from N 2. O 2, or N 2 O At least one of 2 is determined.

[0089] Choose one of the following options c The value of 1 can be determined by N 1. O1 or N 1 O At least one of 1 is determined:

[0090] When 16< N When 1≤32, c 1 = 1; when 32 < N When 1≤64, c 1 = 2; when 64 < N At 1 o'clock, c 1 = 4;

[0091] When 16< N When 1≤32, c 1 = 2; when 32 < N When 1≤64, c 1 = 2; when 64 < N At 1 o'clock, c 1 = 4;

[0092] When 16< N When 1≤32, c 1 = 2; when 32 < N When 1≤64, c 1 = 4; when 64 < N At 1 o'clock, c 1 = 8.

[0093] Choose one of the following options c The value of 2 can be obtained from N 2. O 2, or N 2 O At least one of 2 is determined:

[0094] When 16< N When 2≤32, c 2 = 1; when 32 < N When 2≤64, c 2=2; when 64< N At 2 o'clock, c 2 = 4;

[0095] When 16< N When 2≤32, c 2=2; when 32< N When 2≤64, c 2=2; when 64< N At 2 o'clock, c 2 = 4;

[0096] When 16< N When 2≤32, c 2=2; when 32< N When 2≤64, c 2 = 4; when 64 <N At 2 o'clock, c 2 = 8.

[0097] Configuration signaling may include bit sequences B This bit sequence indicates that it is for some SD base The maximum permissible amplitude or average amplitude (average amplitude is defined in Clause 5.2.2.2.5 of TS 38.214), where the bit sequence B 1 and B 2 are cascaded to form B .

[0098] bit sequence B The length of 1 can be bit sequence B 1 can indicate R 1 R Two numbers of SD base sets Q A number of SD basis sets, by ( along with k (Increases with the increase of the index) Q The first of the number of SD base sets k The number of SD base sets includes the following A number of SD bases :

[0099]

[0100] if Q = R 1 R 2, then B 1 is empty.

[0101] R The value of 1 can be determined by O 1. N 1 or N 1 O At least one of 1 is determined.

[0102] R The value of 2 can be obtained from O 2. N 2, or N 2 O At least one of 2 is determined.

[0103] R 1 and R The value of 1 can be determined as R 1= R 2 = 4.

[0104] R 1 and RThe value of 2 can be set to... O 1 and O 2.

[0105] Q The value can be determined by R 1. R 2, or R 1 R At least one of 2 is determined.

[0106] Q The value can be determined to be 4.

[0107] Q The value can be determined as R 1 R 2 / 4.

[0108] sequence It is a bit sequence ( k =0, 1, ... Q The cascade of -1), which corresponds to the first k Number of SD base sets.

[0109] bit sequence It can be defined as , of which bits ( It is associated with the following SD bases:

[0110] ,like Figure 3 As shown. Figure 3 Bits are shown and A diagram illustrating the relationships between SD bases within an SD base set.

[0111] Bit It may indicate the maximum permissible magnitude for each relevant SD base, the maximum permissible average magnitude of the relevant SD base, the maximum permissible average magnitude for each relevant SD base (the average magnitude is defined in Clause 5.2.2.2.5 of TS 38.214), or the maximum permissible average magnitude of the relevant SD base (the average magnitude is defined in Clause 5.2.2.5 of TS 38.214).

[0112] Choose one of the following options X The value of 1 can be determined by N 1. O 1. R 1. N 1 O 1 or At least one of the following must be determined:

[0113] When 16< When ≤32, X 1 = 2; when 32 < When ≤64, X 1 = 4; when 64 < hour, X 1 = 8;

[0114] When 16< When ≤32, X 1 = 1; when 32 < When ≤64, X 1 = 2; when 64 < hour, X 1 = 4;

[0115] When 16< When ≤32, X 1 = 2; when 32 < When ≤64, X 1 = 2; when 64 < hour, X 1 = 4.

[0116] Choose one of the following options X The value of 2 can be obtained from N 2. O 2. R 2. N 2 O 2, or At least one of the following must be determined:

[0117] When 16< When ≤32, X 2=2; when 32< When ≤64, X 2 = 4; when 64 < hour, X 2 = 8;

[0118] When 16< When ≤32, X 2 = 1; when 32 < When ≤64, X 2=2; when 64< hour, X 2 = 4;

[0119] When 16< When ≤32, X 2=2; when 32< When ≤64, X 2=2; when 64< hour, X 2 = 4.

[0120] bit sequence It can be defined as Among them, ( It is associated with the following SD bases:

[0121] ,like Figure 4 As shown. Figure 4 Bits are shown and A diagram illustrating the relationships between SD bases within an SD base set.

[0122] If bits If set to zero, PMI is not allowed to correspond to any precoding matrix based on the SD base associated with that bit.

[0123] As mentioned above, X The value of 1 can be determined by N 1. O 1. R 1. N 1 O 1 or At least one of them must be determined.

[0124] As mentioned above, X The value of 2 can be obtained from N 2. O 2. R 2. N 2 O 2, or At least one of them must be determined.

[0125] IV. Example 3

[0126] This embodiment involves SD base selection.

[0127] PMI can correspond to v Layer precoding matrix. (and) v The precoding vectors corresponding to each layer can be based on the SD base. The PMI can include an indicator that indicates the public set of the SD base.

[0128] - The number of SD bases in the common set, based on one of the following options. L It can be determined by the number of antenna ports. P Sure:

[0129] When 32< P When ≤64, L =6; when 64 < P When ≤128, L =8; when 128 < P hour, L =10;

[0130] When 32< P When ≤64, L =8; when 64 < P When ≤128, L =10; when 128 < P hour, L =12;

[0131] When 32< P When ≤64, L =8; when 64 < P When ≤128, L =8; when 128 < P hour, L =10.

[0132] - Indicators that indicate the public set of an SD base can include pairs of integers. , q 1 = 0, 1, ... O 1-1, q 2 = 0, 1, ... O 2-1, and K pairs of integers , k =1, 2, ..., K , where each integer pair Indicate multiple SD bases .

[0133] K pairs of integers This can be indicated by a bit sequence, the length of which can be... .

[0134] No. k pairs of integers Can instruct SD base ( , ),in It is an integer pair that can be determined as one of the following options:

[0135] like Figure 5 As shown, . Figure 5 It shows The association between the selected SD base (dark gray and light gray boxes), where .

[0136] .

[0137] .

[0138] ,in and There are two integers.

[0139] and It can be determined as or .

[0140] and Can be respectively by N 1 and N 2. Confirmed.

[0141] ,in and There are two integers.

[0142] and It can be determined as or .

[0143] and Can be respectively by N 1 and N 2. Confirmed.

[0144] PMI can correspond to v Layer precoding matrix. v Each layer can be divided into M There are sets, where each set includes v / M There are several layers. For each layer set, the precoding vectors corresponding to the layers in that set can be based on a common set of SD bases. M The precoding vectors corresponding to each layer can be based on M A corresponding SD base set. PMI may include indicators. M Indicators for a set of SD bases.

[0145] M The value can be determined as v That is, each layer group includes one layer.

[0146] M The value can be determined by v , N 1. N 2. N 1 N 2, or P =2 N 1 N At least one of 2 is determined.

[0147] PMI can includeM Each of the following indicators indicates... M A set of SD bases.

[0148] - M Each SD base set can be shared. L 0 public SD bases, and with the first m Each set of levels can have the SD base set corresponding to a set of levels. L m A dedicated SD base.

[0149] L 0 or L m The value can be determined by N 1. N 2. P =2 N 1 N 2 or N 1 N At least one of 2 is determined.

[0150] L 0 or L m The value can be determined to be a fixed value of 2 or 4.

[0151] PMI may include instructions L Indicators for 0 common SD bases, and indicators for each M Dedicated SD base for each layer M One indicator.

[0152] - M A set of SD bases can belong to L A public group of 0 SD bases, and with the first m The corresponding layer set is the first m Each SD base set can include L m SD base.

[0153] L 0 or L m The value can be determined by N 1. N 2. P =2 N 1 N 2 or N 1 N At least one of 2 is determined.

[0154] L The value of 0 can be determined as a fixed value of 4, 8, 12, or 16.

[0155] L mThe value can be determined as a fixed value of 2, 4, 6, or 8.

[0156] L m The value can be determined by L 0 is determined as L 0 / 2.

[0157] PMI may include instructions L Indicators for the common group of 0 SD bases, and indicators for each M Each set M A set of SD bases M One indicator.

[0158] V. Example 4

[0159] This embodiment involves a non-zero coefficient indication.

[0160] PMI can correspond to v Layer precoding matrix. For each layer, the precoding vector can be based on... L A number of selected SD bases and M v A number of selected FD bases. For each polarization type, there are LM v The number of coefficients and the selected SD and FD bases LM v There are corresponding combinations, and for the two polarization types, there are a total of 2 LM v A number of coefficients. For each layer, PMI may include an indication of 2. LM v Indicator of the non-zero coefficients among a number of coefficients.

[0161] - Non-zero coefficient indicators can include a bit sequence ,in ( ),and ( , ). Bit With coefficient Related, among which ( , ) indicates the first polarization type. l The selected SD base and the first m The coefficients corresponding to the combination of selected FD bases ( , ) indicates the first polarization type. l The selected SD base and the first mThe parameters corresponding to the combination of selected FD bases. If the bits If set to 1, it indicates that the coefficient associated with that bit is non-zero.

[0162] X The value of 1 can be determined by L Sure.

[0163] X The value of 2 can be obtained from M v Sure.

[0164] X 1 and X The value of 2 can be determined as X 1=1 X 2=2、 X 1= X 2=2, or X 1=2 X 2 = 4. Figure 6 The diagram shows X 1= X An example of 2=2. Figure 6 It shows the result of A diagram illustrating the non-zero coefficients, where X 1= X 2=2.

[0165] - Non-zero coefficient indicators can include those applicable to both polarization types. K pairs of integers ( k =1, 2, ..., K ), or applicable to two sets of two corresponding polarization types. K pairs of integers ( k =1, 2, ..., K ).

[0166] K pairs of integers ( k =1, 2, ..., K This can be indicated by a bit sequence, the length of which can be... .

[0167] K pairs of integers ( k =1, 2, ..., K Each pair of integers in ) can indicate multiple non-zero coefficients.

[0168] No. K pairs of integers Indicator coefficients (in and The coefficient is non-zero. Corresponding to the l The selected SD base and the first m A combination of selected FD bases, and It is an integer pair that can be determined as one of the following options:

[0169] .

[0170] .

[0171] .

[0172] ,in and There are two integers.

[0173] and It can be determined as or .

[0174] and Can be respectively by L and M v Sure.

[0175] ,in and There are two integers.

[0176] and It can be determined as or .

[0177] and Can be respectively by L and M v Sure.

[0178] ,in and There are two integers. Figure 7 The diagram shows The situation. Figure 7 It shows the result of A diagram illustrating the non-zero coefficients, where and .

[0179] It can be determined as or .

[0180] It can be by M v Sure.

[0181] ,in and There are two integers.

[0182] It can be determined as or .

[0183] It can be by M v Sure.

[0184] - Figure 8 It shows the result of L pairs of integers ( l =1, 2, ..., L A graph showing the non-zero coefficients indicated by (). For example... Figure 8 As shown, the non-zero coefficient indicator can include L pairs of integers ( l =1, 2, ..., L ),in and Applicable to both polarization types, or both sets L pairs of integers Applicable to two corresponding polarization types.

[0185] If the l pairs of integers If it is not reported, it means All are non-zero.

[0186] Each pair of integers ( l =1, 2, ..., L () indicates multiple non-zero coefficients.

[0187] No. l pairs of integers ( l =1, 2, ..., L Indicator coefficient { or } is non-zero, where Is with the first l The first SD base and the first m The coefficients corresponding to the combination of FD bases.

[0188] It can be equal to The non-zero coefficient indicator can then include indicators applicable to both polarization types. L integers ( l =1, 2, ..., L ), or include two sets applicable to two corresponding polarization types. L integers ( l =1, 2, ..., L ).

[0189] VI. Example 5

[0190] This embodiment involves non-zero coefficient quantization.

[0191] PMI can correspond to v Layer precoding matrix. For each layer, the precoding vector can be based on... L A number of selected SD bases and M v A number of selected FD bases. For each polarization type, there are LM v The number of coefficients and the selected SD and FD bases LM v There are corresponding combinations, and for the two polarization types, there are a total of 2 LM v A number of coefficients. For each level, PMI may include... There are 2 non-zero coefficients, which are selected from 2 LM v A number of coefficients are used, and the amplitude and phase of these non-zero coefficients are quantized.

[0192] - The non-zero coefficients can be divided into two sets. These two sets of non-zero coefficients are quantized using two corresponding quantization schemes.

[0193] For any polarization type, satisfying nonzero coefficient It can belong to a set, but does not satisfy the condition. nonzero coefficient It can belong to another set, where ( , ) indicates the relationship with the first l The selected SD base and the first m The coefficients corresponding to the combination of selected FD bases This indicates the strongest coefficient.

[0194] D The value can be determined by L , M v ,or LM v At least one of them must be determined.

[0195] D The value can be indicated by higher-level parameters.

[0196] D The value can be determined as 2, 3, 4, or 5.

[0197] For any polarization type, satisfying nonzero coefficient The amplitude can be Quantification is performed within the specified range, and the conditions are not met. nonzero coefficient The amplitude can be Quantification is performed within the specified range.

[0198] For any polarization type, satisfying nonzero coefficient The amplitude can be Quantification is performed within the specified range, and the conditions are not met. nonzero coefficient The amplitude can be Quantification is performed within the specified range.

[0199] For any polarization type, satisfying nonzero coefficient The amplitude can be quantized using 4 or 3 bits, which does not satisfy... nonzero coefficient The amplitude can be quantized using 3 or 2 bits.

[0200] For any polarization type, satisfying nonzero coefficient The amplitude can be used as follows Figure 9 The amplitude quantization scheme 1 shown does not meet the requirements. nonzero coefficient The amplitude can be used Figure 10 The amplitude quantization scheme 2 shown is used for quantization.

[0201] For any polarization type, satisfying nonzero coefficient The phase can be quantized using 3, 4, or 5 bits, which does not satisfy... nonzero coefficient The phase can be quantized using 2, 3, or 4 bits.

[0202] For any polarization type, satisfying nonzero coefficient The phase can be used as follows Figure 11 The phase quantization scheme 1 shown does not satisfy the requirements. nonzero coefficient The phase can be used Figure 12 The phase quantization scheme 2 shown is used for quantization.

[0203] - For For non-zero coefficients, the phase quantization scheme can be determined by the quantized value of the amplitude.

[0204] If the quantization amplitude is greater than or equal to the threshold If the phase of the corresponding coefficient is quantized, then the phase of the corresponding coefficient can be quantized using the first phase quantization scheme; otherwise, the phase of the corresponding coefficient can be quantized using the second phase quantization scheme.

[0205] threshold The value can be .

[0206] If the quantization amplitude is greater than or equal to the threshold If the phase of the corresponding coefficient is quantized, then the phase of the corresponding coefficient can be quantized using 3, 4, or 5 bits; otherwise, the phase of the corresponding coefficient can be quantized using 2, 3, or 4 bits.

[0207] If the quantization amplitude is greater than or equal to the threshold Then the phase of the corresponding coefficient can be used Figure 11 Quantization is required; otherwise, the phase of the corresponding coefficient can be used. Figure 12 Quantify it.

[0208] This patent document provides a method for codebook enhancement when the number of BS antenna ports is greater than 32. Codebook enhancement encompasses oversampling factor configuration, codebook subset restriction configuration, SD base selection and indication, non-zero coefficient indication, and non-zero coefficient quantization. The proposed method can reduce configuration signaling overhead and PMI reporting overhead while maintaining DL precoding performance.

[0209] Figure 13 This is an example flowchart for determining the PMI. Operation 1302 includes receiving configuration signaling by the wireless device. Operation 1304 includes determining a precoding matrix indicator (PMI) by the wireless device, wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports of the network device. Operation 1306 includes transmitting the PMI by the wireless device. In some embodiments, the method may be implemented according to embodiments 1-5. In some embodiments, other steps of performing the method may be based on better system performance than conventional protocols.

[0210] In some embodiments, the precoding matrix applicable to more than 32 antenna ports consists of a pair of oversampling factors. O 1 and O 2. Determined, among which O 1 by N 1. P ,or N 1 and P At least one of them is determined, wherein O 2 by N 2. P ,or N 2 and P At least one of them is determined, wherein N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces, and among them P This is the total number of antenna ports.

[0211] In some embodiments, configuration signaling includes a bit sequence. ... , The total number of bits in the bit sequence equal N 1 O 1 N 2 O 2 / X 1 / X 2, of which O 1 and O 2 is a pair of oversampling factors, where N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces, of which X 1 and X 2 is two integers, where N 1 O 1 and N 2 O 2 can be respectively X 1 and X Divisible by 2, where one or more bits in the bit sequence are divisible by one or more spatial (SD) bases. or Associated, and wherein PMI is not allowed to correspond to any of one or more SD bases associated with any one of the bits in one or more bits of the bit sequence that is set to zero.

[0212] In some embodiments, one or more bits in the bit sequence are determined by at least one of the following:

[0213] If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. Then bits ( , ) and SD base ( , Related to;

[0214] If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1=1, X 2=2, then bits and ( , ) and SD base Related;

[0215] If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1=2, X 2=1, then bits and ( , ) and SD base Related;

[0216] If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1= X 2=2, then bits ( , ) and SD base Related; or

[0217] If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1>2, X If 2 > 2, then the bits ( , ) and SD base ( , (related to)

[0218] In some embodiments, X 1 by N 1. O 1 or N 1 OAt least one of 1 is determined, and among them X 2 by N 2. O 2, or N 2 O At least one of 2 is determined.

[0219] In some embodiments, the precoding matrix applicable to more than 32 antenna ports is based on the SD base. , among which bit ( , ) associated SD base y 1. y 2. X 1. X 2. c 1. and c 2. Determined, among which c 1 and c 2 represents two integers representing two comb values, and where N 1 O 1 and N 2 O 2 can be respectively X 1 c 1 and X 1 c Divisible by 2.

[0220] In some embodiments, bits ( , ) and SD base Related.

[0221] In some embodiments, configuration signaling includes a bit sequence. B bit sequence B Instructions for airspace (SD) base The maximum allowed amplitude or average amplitude, where the bit sequence B From bit sequence B 1 and B It is formed by two cascades.

[0222] In some embodiments, bit sequence B 1 instruction R 1 R Two numbers of SD base sets Q A number of SD basis sets, of which are composed of Indexed Q The first of the number of SD base sets k The number of SD base sets includes the following A number of SD bases .

[0223] In some embodiments, bit sequence B 2 is determined by at least one of the following:

[0224] bit sequence From bit sequence Cascaded together, among which k =0, 1, ... Q -1 corresponds to Q The first of the number of SD base sets k A number of SD basis sets, in which bit sequences Defined as , of which bits ( ) and SD base Related; or

[0225] bit sequence Defined as , of which bits ( ) and SD base Related.

[0226] In some embodiments, O 1 and O 2 is a pair of oversampling factors, where N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces. R 1 by N 1. O 1 or N 1 O At least one of 1 is determined, wherein R 2 by N 2. O 2, or N 2 O At least one of 2 is determined, wherein Q Depend on R 1. R 2, or R 1 R At least one of 2 is determined, wherein if Q = R 1 R 2, then B 1 is empty, where X 1 by N 1. O 1. R 1. N 1 O 1 or At least one of them is determined, and among them X 2 byN 2. O 2. R 2. N 2 O 2, or At least one of them must be determined.

[0227] In some embodiments, bits Instructions for bits The maximum allowed amplitude of each SD base in the associated SD base, and the bit The maximum permissible average value of the magnitude of the associated SD base, for bits The maximum allowable average amplitude of each SD base in the associated SD base, or with bits The maximum permissible average of the associated SD base's average amplitude.

[0228] In some embodiments, if bits If set to zero, PMI is not allowed to correspond to the AND bit in the SD base. The precoding matrix of any associated SD base.

[0229] In some embodiments, the PMI includes an indicator of the spatial (SD) basis set, wherein the number of SD basis sets in the SD basis set is... L Depend on P Determined, and among them P This is the total number of antenna ports.

[0230] In some embodiments, the indicator indicating the SD base set includes integer pairs. , q 1 = 0, 1, ... O 1-1, q 2 = 0, 1, ... O 2-1, and K A number of integer pairs , k =1, 2, ..., K , where each integer pair Indicate multiple SD bases , of which k pairs of integers Indicate SD base ( , ), and among them It is an integer pair.

[0231] In some embodiments, the precoding matrix applicable to more than 32 antenna ports includes v A number of precoding vector layers, wherein the PMI includes indicators v+1 number of spatial (SD) basis sets v +1 number of indicators.

[0232] In some embodiments, the precoding matrix applicable to more than 32 antenna ports includes v A number of precoding vector layers, wherein the PMI includes an indicator indicating the spatial domain (SD) basis set and an indicator indicating that it belongs to the SD basis set. v A number of SD basis sets v A number of indicators.

[0233] In some embodiments, the precoding matrix applicable to more than 32 antenna ports includes v There are a number of precoding vector layers, where the precoding vectors for each layer are based on... L A number of selected spatial (SD) bases and M v A number of selected frequency domain (FD) bases, where the PMI includes a non-zero coefficient indicator, the non-zero coefficient indicator indicating 2 for two polarization types. LM v The non-zero coefficients among a number of coefficients, where the non-zero coefficient indicator includes a bit sequence. ,in ( ),and ( , ), where bits and Related, among which ( , ) indicates the first polarization type. l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where ( , ) indicates the first polarization type. l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where X 1 by L Confirmed, among which X 2 by M v Determine, and where if the bit If set to 1, then with that bit The associated coefficients are non-zero.

[0234] In some embodiments, the non-zero coefficient indicator includes indicators applicable to both polarization types. K A number of integer pairs (k =1, 2, ..., K ), or applicable to two sets of two corresponding polarization types. K A number of integer pairs ( k =1, 2, ..., K ),in K A number of integer pairs ( k =1, 2, ..., K Each pair of integers in ) indicates multiple non-zero coefficients, where the first... K pairs of integers Indicator coefficient ( and ) is non-zero, where the coefficient is Corresponding to the l The selected SD base and the first m A combination of selected FD bases, and where It is an integer pair.

[0235] In some embodiments, the non-zero coefficient indicator includes indicators applicable to both polarization types. L A number of integer pairs ( l =1, 2, ..., L , ,and ), or applicable to two sets of two corresponding polarization types. L A number of integer pairs , of which l pairs of integers ( l =1, 2, ..., L Indicator coefficient { or } is non-zero, and its coefficient is... Corresponding to the l The selected SD base and the first m A combination of selected FD bases.

[0236] In some embodiments, the precoding matrix applicable to more than 32 antenna ports includes v There are a number of precoding vector layers, where the precoding vectors for each layer are based on... L A number of selected spatial (SD) bases and M v A number of selected frequency domain (FD) bases, where the PMI includes a non-zero coefficient indicator, the non-zero coefficient indicator indicating 2 for two polarization types. LM v The number of coefficients A number of non-zero coefficients, of which A number of non-zero coefficients are divided into more than one set, and more than one set of non-zero coefficients is quantized using more than one corresponding quantization scheme.

[0237] In some embodiments, for any polarization type, satisfying nonzero coefficient It belongs to the first set, which does not satisfy nonzero coefficient Belongs to the second set, where ( , ) indicates the relationship with the first l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where This represents the strongest coefficient, and among them... D Depend on L , M v ,or LM v At least one of them is determined by high-level parameters, or is determined to be 2, 3, 4, or 5.

[0238] In some embodiments, for The phase quantization scheme is determined by the quantization value of the amplitude, which has a number of non-zero coefficients.

[0239] Figure 14 This is an example flowchart for receiving a PMI. Operation 1402 includes sending configuration signaling by a network device including more than 32 antenna ports. Operation 1404 includes receiving a precoding matrix indicator (PMI) by the network device, wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix suitable for a network device including more than 32 antenna ports. In some embodiments, the method can be implemented according to embodiments 1-5. In some embodiments, other steps of performing the method can be based on better system performance than conventional protocols. All the above-described techniques applicable to wireless devices are also applicable to network devices.

[0240] Figure 15 An example block diagram of a hardware platform 1500 is shown, which may be part of a network device (e.g., a base station or transmit-receive point (TRP)) or a wireless device (e.g., a user equipment (UE)). The hardware platform 1500 includes at least one processor 1510 and a memory 1505 on which instructions are stored. These instructions, when executed by the processor 1510, configure the hardware platform 1500 to perform... Figures 1 to 14The operations described in the various embodiments described in this patent document are as follows: Transmitter 1515 sends or transmits information or data to another device. For example, a network device transmitter may send a message to a user equipment. Receiver 1520 receives information or data sent or transmitted by another device. For example, a user equipment may receive a message from a network node. For example, as described in this document, a UE, wireless device, or network device may be implemented using hardware platform 1500.

[0241] The implementation described above will be applied to wireless communication. Figure 16 An example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 1620 and one or more user equipments (UEs) 1611, 1612, and 1613 is shown. In some embodiments, the UE uses a communication link to the network (sometimes referred to as the uplink direction, as shown by dashed arrows 1631, 1632, and 1633) to access the BS (e.g., the network, TRP), which subsequently enables subsequent communication from the BS to the UE (e.g., shown in the direction from the network to the UE, sometimes referred to as the downlink direction, as shown by arrows 1641, 1642, and 1643). In some embodiments, the BS sends information to the UE (sometimes referred to as the downlink direction, as shown by arrows 1641, 1642, and 1643), which then enables subsequent communication from the UE to the BS (e.g., in the direction from the UE to the BS, sometimes referred to as the uplink direction, as shown by dashed arrows 1631, 1632, and 1633). The UE can be, for example, a smartphone, tablet, mobile computer, machine-to-machine (M2M) device, Internet of Things (IoT) device, etc. The UE described in this document can be communicatively coupled to Figure 16 The base station 1620 is described in the text.

[0242] Those skilled in the art will understand that this patent document discloses a method for a wireless device to determine a precoding matrix indicator (PMI) corresponding to a precoding matrix applicable to more than 32 antenna ports of a network device. The PMI can be based on a codebook indicated by configuration signaling sent by the network device. More specifically, techniques for configuring oversampling factors, configuring codebook subset restrictions, spatial (SD) / frequency (FD) basis selection, non-zero coefficient indication, and non-zero coefficient quantization are disclosed. The disclosed method can reduce PMI reporting overhead.

[0243] Some embodiments described herein are described in the general context of methods or processes that, in one embodiment, may be implemented by a computer program product embodied in a computer-readable medium, including computer-executable instructions, such as program code, that are executed by a computer in a networked environment. The computer-readable medium may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), optical disc (CD), digital versatile disc (DVD), etc. Therefore, the computer-readable medium may include non-transitory storage media. Typically, program modules may include routines, programs, objects, components, data structures, etc., that perform a particular task or implement a particular abstract data type. Computer or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding actions for implementing the functionality described in such steps or processes.

[0244] Some embodiments of the disclosed examples can be implemented as devices or modules using hardware circuitry, software, or a combination thereof. For example, a hardware circuitry implementation may include discrete analog and / or digital components, which may be integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate arrays (FPGAs) devices. Some implementations may additionally or alternatively include digital signal processors (DSPs), which are special-purpose microprocessors with an architecture optimized for the operational requirements of digital signal processing associated with the functions disclosed in this application. Similarly, the various components or sub-components within each module may be implemented using software, hardware, or firmware. Connections between modules and / or components within modules may be provided using any of the connection methods and media known in the art, including but not limited to communication via the Internet, wired, or wireless networks using appropriate protocols.

[0245] While this document contains numerous details, these details should not be construed as limiting the scope of the claimed invention or the scope of what may be claimed, but rather as descriptions of features of particular embodiments. Certain features described in the context of individual embodiments in this document may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as operating in certain combinations, and even initially claimed in this way, in some cases one or more features from the claimed combination may be removed from that combination, and the claimed combination may involve sub-combinations or variations thereof. Similarly, although operations are described in a specific order in the drawings, this should not be construed as requiring such operations to be performed in the specific order shown or sequentially, or requiring the performance of all shown operations to obtain the desired result.

[0246] Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on the content described and illustrated in this patent document.

Claims

1. A method for wireless communication, comprising: Configuration signaling is received by the wireless device; The wireless device determines a precoding matrix indicator (PMI), wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix applicable to more than 32 antenna ports of the network device; as well as The PMI is transmitted by the wireless device.

2. The method of claim 1, wherein the precoding matrix applicable to more than 32 antenna ports is composed of a pair of oversampling factors. O 1 and O 2. Determined, among which O 1 by N 1. P ,or N 1 and P At least one of them is determined, wherein O 2 by N 2. P ,or N 2 and P At least one of them is determined, wherein N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces, and among them P This is the total number of antenna ports.

3. The method according to claim 1 or 2, wherein the configuration signaling comprises a bit sequence. ... , The total number of bits in the bit sequence equal N 1 O 1 N 2 O 2 / X 1 / X 2, of which O 1 and O 2 is a pair of oversampling factors, where N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces, of which X 1 and X 2 is two integers, where N 1 O 1 and N 2 O 2 can be respectively X 1 and X 2-Divisibility, wherein one or more bits in the bit sequence are divided by one or more spatial (SD) bases. or Associated, and wherein the PMI is not permitted to correspond to any of the one or more SD bases associated with any bit in the bit sequence that is set to zero.

4. The method of claim 3, wherein one or more bits in the bit sequence are determined by at least one of the following: If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. Then bits ( , ) and SD base ( , Related to; If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1=1, X 2=2, then bits and ( , ) and SD base Related; If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1=2, X 2=1, then bits and ( , ) and SD base Related; If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1= X 2=2, then bits ( , ) and SD base Related; or If the precoding matrix is ​​applicable to more than 32 antenna ports, it is based on the SD base. ,and X 1>2, X If 2 > 2, then the bits ( , ) and SD base ( , (related to) 5. The method according to claim 3 or 4, wherein X 1 by N 1. O 1 or N 1 O At least one of 1 is determined, and among them X 2 by N 2. O 2, or N 2 O At least one of 2 is determined.

6. The method according to any one of claims 3 to 5, wherein the precoding matrix applicable to more than 32 antenna ports is based on SD base. , among which bit ( , ) associated SD base y 1. y 2. X 1. X 2. c 1. and c 2. Determined, among which c 1 and c 2 represents two integers representing two comb values, and where N 1 O 1 and N 2 O 2 can be respectively X 1 c 1 and X 1 c Divisible by 2.

7. The method of claim 6, wherein the bit ( , ) and SD base Related.

8. The method according to claim 1 or 2, wherein the configuration signaling comprises a bit sequence. B The bit sequence B Instructions for airspace (SD) base The maximum permissible amplitude or average amplitude of the bit sequence. B From bit sequence B 1 and B It is formed by two cascades; The bit sequence B 1 instruction R 1 R Two numbers of SD base sets Q A number of SD basis sets, of which are composed of The index described Q The first of the number of SD base sets k The number of SD base sets includes the following A number of SD bases ; The bit sequence B 2 is determined by at least one of the following: The bit sequence From bit sequence Cascaded together, among which k =0, 1, ... Q -1 corresponds to the Q The number of SD base sets, the first k A number of SD base sets, wherein the bit sequence Defined as , of which bits , With SD base Related; or The bit sequence Defined as , of which bits , With SD base Related; and in O 1 and O 2 is a pair of oversampling factors, where N 1 is N The total number of 1-dimensional interfaces, of which N 2 is N The total number of 2-dimensional interfaces, of which R 1 by N 1. O 1 or N 1 O At least one of 1 is determined, wherein R 2 by N 2. O 2, or N 2 O At least one of 2 is determined, wherein Q Depend on R 1. R 2, or R 1 R At least one of 2 is determined, wherein if Q = R 1 R 2, then B 1 is empty, where X 1 by N 1. O 1. R 1. N 1 O 1 or At least one of them is determined, and among them X 2 by N 2. O 2. R 2. N 2 O 2, or At least one of them must be determined.

9. The method of claim 8, wherein the bit Instructions for the bits The maximum allowable amplitude of each SD base in the associated SD bases, and the bit The maximum permissible average value of the magnitude of the associated SD base, for the bit The maximum allowable average amplitude of each of the associated SD bases, or the bit The maximum permissible average value of the associated SD base.

10. The method according to claim 8 or 9, wherein if the bit If set to zero, the PMI is not allowed to correspond to the bit in the SD base. The precoding matrix of any associated SD base.

11. The method according to any one of claims 1 to 10, wherein the PMI includes an indicator indicating a set of spatial (SD) bases, wherein the number of SD bases in the set of SD bases is... L Depend on P Determined, and among them P This is the total number of antenna ports.

12. The method of claim 11, wherein the indicator indicating the SD base set comprises integer pairs. , q 1 = 0, 1, ... O 1-1, q 2 = 0, 1, ... O 2-1, and K A number of integer pairs , k =1, 2, ..., K , where each integer pair Indicate multiple SD bases , of which k pairs of integers Indicate SD base , , , and among them It is an integer pair.

13. The method according to any one of claims 1 to 10, wherein the precoding matrix applicable to more than 32 antenna ports comprises v A number of precoding vector layers, and wherein the PMI includes an instruction v +1 number of spatial (SD) basis sets v +1 number of indicators.

14. The method according to any one of claims 1 to 10, wherein the precoding matrix applicable to more than 32 antenna ports comprises v A number of precoded vector layers, wherein the PMI includes an indicator indicating a spatial (SD) basis set and an indicator indicating that the PMI belongs to the SD basis set. v A number of SD basis sets v A number of indicators.

15. The method according to any one of claims 1 to 14, wherein the precoding matrix applicable to more than 32 antenna ports comprises v There are a number of precoding vector layers, where the precoding vectors for each layer are based on... L A number of selected spatial (SD) bases and M v A selected number of frequency domain (FD) bases, wherein the PMI includes a non-zero coefficient indicator that indicates 2 for two polarization types. LM v The non-zero coefficients are among a number of coefficients, wherein the non-zero coefficient indicator comprises a bit sequence. ,in , ,and , , The bits therein and Related, among which ( , ) indicates the first polarization type. l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where ( , ) indicates the first polarization type. l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where X 1 by L Confirmed, among which X 2 by M v Determine, and wherein if the bit If set to 1, then with the bit The associated coefficients are non-zero.

16. The method of claim 15, wherein the non-zero coefficient indicator comprises indicators applicable to the two polarization types. K A number of integer pairs , k =1, 2, ..., K Or, applicable to two sets of two corresponding polarization types. K A number of integer pairs , k =1, 2, ..., K ,in K A number of integer pairs , k =1, 2, ..., K Each pair of integers in the table indicates multiple non-zero coefficients, where the first... K pairs of integers Indicator coefficient , and It is non-zero, where the coefficient is... Corresponding to the l The selected SD base and the first m A combination of selected FD bases, and where It is an integer pair.

17. The method of claim 15, wherein the non-zero coefficient indicator comprises indicators applicable to both polarization types. L A number of integer pairs , l =1, 2, ..., L , ,and Or, applicable to two sets of two corresponding polarization types. L A number of integer pairs , of which l pairs of integers , l =1, 2, ..., L Indicator coefficient { or } is non-zero, and its coefficient is... Corresponding to the l The selected SD base and the first m A combination of selected FD bases.

18. The method according to any one of claims 1 to 17, wherein the precoding matrix applicable to more than 32 antenna ports comprises v There are a number of precoding vector layers, where the precoding vectors for each layer are based on... L A number of selected spatial (SD) bases and M v A selected number of frequency domain (FD) bases, wherein the PMI includes a non-zero coefficient indicator that indicates 2 for two polarization types. LM v The number of coefficients A number of non-zero coefficients, wherein A number of non-zero coefficients are divided into more than one set, and the non-zero coefficients in the more than one set are quantized using more than one corresponding quantization scheme.

19. The method of claim 18, wherein for any polarization type, the following condition is satisfied: nonzero coefficient It belongs to the first set, which does not satisfy nonzero coefficient Belongs to the second set, where , , Indicates and for the first l The selected SD base and the first m The coefficients corresponding to the combinations of selected FD bases, where This represents the strongest coefficient, and among them... D Depend on L , M v ,or LM v At least one of them is determined by high-level parameters, or is determined to be 2, 3, 4, or 5.

20. The method according to claim 18 or 19, wherein the method is for the purpose of... The phase quantization scheme is determined by the quantization value of the amplitude, which has a number of non-zero coefficients.

21. A method for wireless communication, comprising: Configuration signaling is sent by a network device that includes more than 32 antenna ports; as well as The network device receives a precoding matrix indicator (PMI), wherein the PMI is based on a codebook indicated by the configuration signaling, and the PMI corresponds to a precoding matrix applicable to the network device including more than 32 antenna ports.

22. An apparatus for wireless communication, comprising a processor, wherein the processor is configured to implement the method according to any one or more of claims 1 to 21.

23. A computer-readable program storage medium having code stored thereon, which, when executed by a processor, causes the processor to perform the method according to any one or more of claims 1 to 21.

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