CN118264281A

CN118264281A - PMI parameter sharing method, terminal and network side equipment

Info

Publication number: CN118264281A
Application number: CN202211676115.3A
Authority: CN
Inventors: 袁江伟; 吴昊
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2024-06-28

Abstract

The application discloses a PMI parameter sharing method, a terminal and network side equipment, belonging to the field of wireless communication, wherein the PMI parameter sharing method comprises the following steps: the network side equipment indicates first content information of a terminal, wherein the first content information comprises: sharing first information among Ki CSI-RSs in the N CSI-RSs; the first information is used for indicating a PMI related parameter, N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N is a preset value and N is an integer greater than 0.

Description

PMI parameter sharing method, terminal and network side equipment

Technical Field

The application belongs to the technical field of wireless communication, and particularly relates to a method for sharing precoding matrix indicator (Precoding matrix indicator, PMI) parameters, a terminal and network side equipment.

Background

In the related art, the following two codebook structures may be employed:

Or alternatively

Wherein W _1,i, i=1, 2, …, N represents the spatial basis vector matrix associated with the i-th channel state Information reference signal (CHANNEL STATE Information RE REFERENCE SIGNAL, CSI-RS),Representing the combined coefficient matrix of the i-th CSI-RS association,Representing the frequency domain basis vector matrix associated with the i-th CSI-RS,A matrix of frequency domain base vectors representing all CSI-RS associations (the frequency domain base vectors associated within the matrix include the frequency domain base vectors associated with all CSI-RS).

For each transmission-reception point (Transmission Reception Point, TRP) associated combination coefficient matrix, it can be further written as:

Where Am _0,i represents the reference amplitude coefficient associated with the ith CSI-RS (there may be all CSI-RS with a value of 1, i.e., there is no value), and Am _1,i/Am_2,i represents the first polarization reference amplitude coefficient and the second polarization reference amplitude coefficient, respectively (there may be all CSI-RS associated with the same value, i.e., am _1,i of different i is the same, and Am _2,i of different i is the same). Am _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents the magnitude coefficient associated with the mth frequency domain base vector of the jth spatial base vector, where L _i represents the number of spatial base vectors associated with the ith CSI-RS, and M _i represents the number of frequency domain base vectors associated with the ith CSI-RS. Phase _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents the Phase coefficient associated with the mth frequency domain base vector of the jth spatial base vector.

The terminal calculates PMI parameters corresponding to each CSI-RS according to the measurement results of each CSI-RS, and feeds back the PMI parameters corresponding to each CSI-RS to the network side equipment, however, in the case that a plurality of CSI-RSs exist, the network side equipment needs to configure PMI related parameters of each CSI-RS to the terminal, and the terminal also needs to calculate the PMI parameters according to the plurality of CSI-RSs, so that a feedback process of the PMI parameters increases a large amount of load cost compared with one CSI-RS, and how to reduce the load cost in the PMI parameter feedback process is a technical problem to be solved currently.

Disclosure of Invention

The embodiment of the application provides a PMI parameter sharing method, a terminal and network side equipment, which can reduce the load overhead in the PMI parameter feedback process.

In a first aspect, a method for sharing PMI parameters is provided, including: the network side equipment indicates first content information of a terminal, wherein the first content information comprises: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; n is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0.

In a second aspect, there is provided a PMI parameter sharing apparatus, including: a determining module, configured to determine first content information, where the first content information includes: sharing first information between K _i CSI-RSs in the N channel state information reference signals (CSI-RSs), wherein the first information is used for indicating PMI related parameters; n is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0; and the indication module is used for indicating the first content information of the terminal.

In a third aspect, a feedback method of PMI information is provided, including: the terminal acquires first content information indicated by the network side equipment, wherein the first content information comprises: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; n is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0; and/or the terminal sends a CSI report, wherein for PMI information of K _i CSI-RS sharing the first information, PMI information of a reference CSI-RS is fed back in the CSI report, and the reference CSI-RS is one CSI-RS of the K _i CSI-RS.

In a fourth aspect, there is provided a feedback apparatus of PMI information, including: the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring first content information indicated by network side equipment, and the first content information comprises: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; n is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0; and/or a sending module, configured to send a CSI report, where, for PMI information of K _i CSI-RS sharing the first information, PMI information of a reference CSI-RS is fed back in the CSI report, where the reference CSI-RS is one CSI-RS of the K _i CSI-RS.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method according to the third aspect.

In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is configured to implement the steps of the method according to the third aspect, and the communication interface is configured to communicate with an external device.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method as described in the first aspect.

In an eighth aspect, a network side device is provided, which includes a processor and a communication interface, where the processor is configured to implement the steps of the method as described in the first aspect, and the communication interface is configured to communicate with an external device.

In a ninth aspect, there is provided a PMI parameter sharing system, including: a terminal operable to perform the steps of the method according to the third aspect, and a network side device operable to perform the steps of the method according to the first aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the third aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the third aspect.

In the embodiment of the application, the network equipment indicates that the PMI related parameters can be shared among the partial CSI-RSs. When the terminal feeds back the PMI, the terminal feeds back the PMI information of the reference CSI-RS for a plurality of CSI-RSs sharing part of PMI related parameters, so that the feedback overhead of the PMI parameter feedback process can be reduced.

Drawings

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic flow chart of a PMI parameter sharing method according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of another method for sharing PMI parameters according to an embodiment of the present application;

fig. 4 is a schematic flow chart of another method for sharing PMI parameters according to an embodiment of the present application;

Fig. 5 is a schematic flow chart of another method for sharing PMI parameters according to an embodiment of the present application;

fig. 6 is a schematic flow chart of another method for sharing PMI parameters according to an embodiment of the present application;

fig. 7 is a schematic flow chart of a PMI information feedback method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a PMI parameter sharing device according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a PMI information feedback device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11 shows a schematic hardware structure of a terminal according to an embodiment of the present application;

Fig. 12 shows a schematic hardware structure of a network side device according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for exemplary purposes and NR terminology is used in much of the following description, but these techniques may also be applied to applications other than NR system applications, such as 6 th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side device called a notebook, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an ultra-Mobile Personal Computer (ultra-Mobile Personal Computer, UMPC), a Mobile internet appliance (Mobile INTERNET DEVICE, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home device with a wireless communication function, such as a refrigerator, a television, a washing machine, a furniture, etc.), a game machine, a Personal Computer (Personal Computer, a PC), a teller machine, or a self-service machine, etc., and the wearable device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may include an access network device and/or a core network device, where the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or a radio access network element. Access network device 12 may include a base station, a WLAN access Point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access Point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (Extended SERVICE SET, ESS), a home node B, a home evolved node B, a transmission and reception Point (TRANSMITTING RECEIVING Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

In the related art, coefficients of PMI coefficients fed back by the terminal mainly include i ₁ and i ₂, where i ₁ includes i _1,1、i_1,2、i_1,5、i_1,6,l、i_1,7,l、i_1,8,l,i₂ including i _2,3,l、i_2,4,l、i_2,5,l, where l=one or more of 1,2,3,4. For RI v of 2, then l=1, 2, RI v of 4, l=1, 2,3,4.

Wherein,

I _1,1 is used to indicate the sequence number of the airspace base vector group, which is equal to [ q ₁,q₂ ], wherein q ₁∈{0,1,…,O₁-1},q₂∈{0,1,…,O₂-1},O₁,O₂ is the oversampling factor of network configuration;

i _1,2 is used for indicating the sequence numbers of L airspace base vectors in the airspace base vector group indicated by i _1,1, and is equal to Wherein N1, N2 are parameters of port number of network configuration, L is the number of DFT vectors indicated by the network,The number of combinations of L beams selected from N ₁N₂ beams is represented.

I _1,5 denotes the start position M _initial of the window of length 2M _v, the range of values is i _1,5∈{0,1,…,2M_v -1, where M _v denotes the number of frequency domain basis vectors. Note that: only in the case where N ₃ >19, when N ₃ is equal to or less than 19, i _1,5 =0 and the terminal does not need to feed back the coefficient.

I _1,6,l is used for indicating the positions of M _v frequency domain base vectors fed back by layer l in N ₃ frequency domain base vectors, the value range is divided into two cases, and when N ₃ >19, the value range isWhen N ₃ is less than or equal to 19, the value range isFeedback is provided by way of a combination number.

I _1,7,l is a layer l non-zero combination coefficient indication, a bit sequence, and a total length of 2LM _v.

I _1,8,l is the layer L strongest combination coefficient indication, and the value range is i _1,8,l e {0,1, …,2L-1}, where i _1,8,l represents the i _1,8,l th nonzero combination coefficient for rank=1 transmission, and i _1,8,l represents the i _1,8,l th coefficient for transmissions greater than rank=1.

I _2,3,l is a layer l two polarized amplitude coefficient quantization indication, each amplitude coefficient is 4bit string, each bit string corresponds to a quantization value, wherein the polarized amplitude coefficient where the strongest coefficient is located is not fed back, and is assumed to be 1.

I _2,4,l is an indication of quantization of the amplitude coefficients of all non-zero combined coefficients of layer l, each amplitude coefficient being a bit string of 3 bits, each codepoint corresponding to a quantized value. The amplitude coefficient of the strongest coefficient is not fed back, and is assumed to be 1, and the residual coefficient only feeds back the amplitude non-zero combined coefficient, so the number of total feedback coefficients for layer l is K _NZ,l -1, wherein K _NZ,l represents the number of layer l amplitude non-zero combined coefficients.

I _2,5,l is a phase coefficient quantization indication of all non-zero combined coefficients of layer l, each coefficient is a 4bit string, and each codepoint corresponds to a quantized value. The phase coefficient of the strongest coefficient is not fed back, and is assumed to be 0, and the residual coefficient only feeds back the phase coefficient corresponding to the amplitude non-zero combination coefficient, so that the number of total feedback coefficients for layer l is K _NZ,l -1, wherein K _NZ,l represents the number of amplitude non-zero combination coefficients.

Under the condition that a plurality of CSI-RSs are configured on a network side, a terminal needs to calculate PMI parameters according to the plurality of CSI-RSs, so that a large amount of PMI load overhead is increased.

The method for sharing PMI parameters provided by the embodiment of the application is described in detail below through some embodiments and application scenarios thereof with reference to the accompanying drawings.

Fig. 2 shows a flowchart of a method for sharing PMI parameters in an embodiment of the present application, and the method 200 may be performed by a network side device. In other words, the method may be performed by software or hardware installed on the network-side device. As shown in fig. 2, the method may include the following steps.

S210, the network side equipment indicates first content information of a terminal, wherein the first content information comprises: and sharing first information among K _i CSI-RSs in the N channel state information reference signals (CSI-RSs), wherein the first information is used for indicating PMI related parameters.

In an embodiment of the present application, the first information may include at least one of:

(1) The frequency domain base vector indication is used for indicating the frequency domain base vector associated with the CSI-RS; and when the terminal feeds back the PMI parameter, sharing frequency domain base vector indication among K _i CSI-RSs.

(2) A frequency domain base vector offset indication for indicating a CSI-RS associated frequency domain base vector offset; and when the terminal feeds back PMI parameters, sharing frequency domain base vector offset indication among K _i CSI-RSs. The shared frequency domain base vector offset indication may or may not be fed back, and is not particularly limited.

(3) Window starting position indication information of a frequency domain base vector window is used for indicating the frequency domain starting position of a frequency domain base vector window associated with the CSI-RS; when the terminal feeds back the PMI parameter, K _i CSI-RSs share window starting position indication information of a frequency domain base vector window. The window start position indication information of the shared frequency domain base vector window may or may not exist, and is not limited. For example, when the number of frequency domain base vectors is equal to or greater than a specific value, it is not present when it is less than the specific value.

(4) The space domain base vector indication is used for indicating the space domain base vector associated with the CSI-RS; and when the terminal feeds back the PMI, sharing the airspace base vector indication among K _i CSI-RSs.

(5) The strongest coefficient indication is used for indicating the space domain position and the frequency domain position of the strongest coefficient associated with the CSI-RS; and sharing the strongest coefficient indication among the K _i CSI-RSs in terminal feedback. At this time, the strongest coefficient indicating bit length may be related to the number of spatial base vectors associated with one CSI-RS of the K _i CSI-RSs.

(6) The non-zero coefficient indication is used for indicating the space domain position and the frequency domain position of the non-zero coefficient associated with the CSI-RS; and when the terminal feeds back, sharing non-zero coefficient indication among the K _i CSI-RSs. At this time, the non-zero coefficient indicates that the bit length is related to the number of spatial base vectors and the number of frequency domain base vectors associated with one CSI-RS of the K _i CSI-RSs.

(7) A non-zero coefficient number indication for indicating the number of non-zero coefficients associated with the CSI-RS; and when the terminal feeds back, indicating the number of non-zero coefficients among the K _i CSI-RSs. I.e., K _i CSI-RSs have the same number of non-zero coefficients.

(8) The resource selection indication is used for indicating the CSI-RS associated with the PMI parameter fed back by the terminal; and when the terminal feeds back, sharing the resource selection indication among the K _i CSI-RSs. For example: the K _i CSI-RSs either feed back the associated partial PMI parameters or feed back no associated partial PMI parameters.

(9) The space-domain base vector quantity indication is used for indicating the space-domain base vector quantity associated with the CSI-RS; and when the terminal feeds back, sharing the space vector quantity indication among the K _i CSI-RSs, and calculating the PMI parameter load. That is, K _i CSI-RSs are associated with the same number of spatial base vectors.

(10) The frequency domain base vector quantity indication is used for indicating the quantity of the frequency domain base vectors associated with the CSI-RS; and when the terminal feeds back, sharing frequency domain base vector quantity indication among K _i CSI-RSs, and calculating the PMI parameter load size. That is, K _i CSI-RSs are associated with the same number of frequency domain base vectors.

(11) The number of airspace base vectors configured by the network; for K _i CSI-RSs sharing the first information, the number of spatial base vectors configured by the network side device is the same, for example, the network side device configures one value or configures a plurality of same values.

(12) Number of frequency domain basis vectors for network configuration. For K _i CSI-RSs sharing the first information, the number of frequency domain base vectors configured by the network side device is the same, for example, the network configures one value, or configures a plurality of same values.

That is, the network side device instructs the terminal that at least one of the above-described information (1) to (12) can be shared among the K _i CSI-RSs.

Wherein N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0.

In an embodiment of the present application, n may be equal to 1. For example, the network side device configures n=4 CSI-RSs, and the network side device may indicate that CSI-RS1 and CSI-RS2 share the first information. Or configuring n=4 CSI-RS at the network side device, the network side device may indicate that CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4 share the first information. Or configuring n=4 CSI-RS at the network side device, the network side device may indicate that CSI-RS1, CSI-RS2, and CSI-RS3 share the first information.

Or n may be 2 or an integer greater than 2. For example, the network side device configures n=4 CSI-RSs, and the network side device may indicate that K ₁ =2 CSI-RSs and K ₂ =2 CSI-RSIs share the first information, e.g., CSI-RS1 and CSI-RS2 share the first information, and CSI-RS3 and CSI-RS4 share the first information.

In the embodiment of the present application, the K _i may be equal or unequal, which is not limited in the embodiment of the present application.

In an optional implementation manner, when the network side device indicates the first content information, the network side device may indicate N CSI-RS resource packets in N CSI-RS, where the ith CSI-RS resource packet includes K _i CSI-RS sharing the first information. For example, the network side device may display or implicitly indicate one or more CSI-RS resource groups of the N CSI-RS, where CSI-RS in the same CSI-RS resource group share the first information. By adopting the alternative implementation manner, K _i CSI-RSs sharing the first information can be flexibly indicated by indicating one or more CSI-RS resource groups in the N CSI-RSs.

In the above optional implementation manner, when the terminal feeds back the PMI parameter, the CSI-RS resource selection indication bit sequence (bitmap) length or bit number in the first portion (part 1) of the CSI report is determined according to the number of CSI-RS resource groups, where each CSI-RS resource group is formed by K _i CSI-RS resources sharing the first information. For example, the network side device configures n=4 CSI-RSs, where the network side device may indicate that CSI-RS1 and CSI-RS2 share first information, and a CSI-RS resource selection indication bit sequence (bitmap) length or bit number in a first portion (part 1) of the CSI report is 3, where a first bit corresponds to CSI-RS1 and CSI-RS2, a second bit corresponds to CSI-RS3, and a third bit corresponds to CSI-RS4.

In an alternative implementation, the first information is shared by default N CSI-RSs. When the terminal feeds back the PMI parameter, the length or bit number of the CSI-RS resource selection indication bit sequence (bitmap) in the first part (part 1) of the CSI report is 0, or the terminal does not feed back the resource selection indication bit sequence (bitmap), or the network configuration terminal does not feed back the resource selection indication bit sequence (bitmap).

In an alternative implementation, the network-side device may indicate the first content information through higher layer signaling. In this alternative implementation, the network-side device may explicitly or implicitly indicate which CSI-RSs share the first information through higher layer signaling, where the higher layer signaling includes one or more indication information, and each indication information indicates which CSI-RSs (may also be referred to as measurement resources) share the first information. Optionally, for CSI-RS not indicated by higher layer signaling, the terminal assumes that these CSI-RS do not share the first information with each other or with the indicated CSI-RS.

In one possible implementation manner, the high-layer signaling is configured with a shared domain, where the shared domain includes n pieces of indication information, and the ith indication information includes an identifier of K _i CSI-RSs sharing the first information. For example, a shared domain may be configured in the signaling NZP-CSI-RS-resource set, where the shared domain includes one or more indication information, each indication information includes a plurality of sequence numbers, and the sequence numbers have values from 0 to N-1, where 0 represents a first CSI-RS configured in the NZP-CSI-RS-resource set, and N-1 represents an nth CSI-RS configured in the NZP-CSI-RS-resource set. If one indication information includes 2 sequence numbers, the CSI-RS associated with the 2 sequence numbers share the first information.

In another possible implementation manner, a shared domain is configured in the higher layer signaling, where the shared domain includes N pieces of indication information, each piece of indication information is an N-bit sequence, and a value of a bit corresponding to K _i CSI-RS in an ith piece of indication information is a predetermined value. For example, a shared field is configured in the signaling NZP-CSI-RS-resource set, where the field includes one or more indication information, each indication information is a bit sequence, and the length is N, where a first bit is associated with a first CSI-RS, an nth bit is associated with an nth CSI-RS, and a bit associated CSI-RS with a bit sequence of 1 shares the first information.

In yet another possible implementation, the higher layer signaling may directly configure n indication information for indicating which CSI-RSs share the first information. For example, one or more indication information is directly configured in the signaling NZP-CSI-RS-resource set to indicate which CSI-RS share the first information.

In yet another possible implementation manner, the higher layer signaling associates one group identifier for each CSI-RS of the N CSI-RS, and the CSI-RS associated with the same group identifier share the first information. For example, one Group ID is associated in each CSI-RS resource (resource), indicating to which Group this resource is associated, shared first information associated to the same Group.

In yet another possible implementation, the higher layer signaling configures a sequence including N group identifications for the CSI-RS resource set, each group identification in the sequence is associated with one CSI-RS, and the CSI-RS associated with the same group identification share the first information. For example, a sequence (group ID sequence) is configured in resource set, the sequence including N group IDs, each ID in the sequence being associated with one resource, the resources associated with the same group ID sharing the first information.

In one possible implementation manner, after the network side device indicates the first content information of the terminal, the terminal feeds back the PMI information of the reference CSI-RS and the amplitude offset value of other CSI-RS in the K _i CSI-RS relative to the reference CSI-RS according to the first content information when feeding back the PMI parameter, so as to further reduce the non-zero coefficient amplitude indication overhead. Thus, in this possible implementation, as shown in fig. 3, after S210, the method may further comprise the steps of:

s212, the network side equipment receives PMI information of reference CSI-RSs fed back by the terminal and amplitude offset values of non-zero coefficients associated with each first CSI-RS, wherein the amplitude offset values are offset values of the amplitudes of the non-zero coefficients associated with the first CSI-RSs relative to the amplitudes of the non-zero coefficients associated with the reference CSI, the amplitude offset values are quantized values in a first quantized table, the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except for the reference CSI-RSs in the K _i CSI-RSs sharing the first information.

In this possible implementation manner, for K _i CSI-RSs sharing the first information, the terminal determines one reference CSI-RS according to the network configuration or a default rule, or the terminal feeds back the reference CSI-RS, for any one of the remaining K _i -1 CSI-RSs, the terminal uses the first quantization table to indicate the amplitude of its associated non-zero coefficient. For example, for a non-zero coefficient associated with any CSI-RS of K _i -1 CSI-RS, the terminal calculates an amplitude offset value (which may be a difference value or a ratio value) of the non-zero coefficient and an associated reference non-zero coefficient, and performs quantization feedback on the offset value by using a first quantization table. Wherein the reference non-zero coefficient is a reference CSI-RS associated non-zero coefficient. Wherein, a reference non-zero coefficient associated with a non-zero coefficient associated with any CSI-RS is the reference non-zero coefficient with the same position as the non-zero coefficient in the reference non-zero coefficient.

For example, the network side device configures 4 CSI-RS (CMR 0/1/2/3), and indicates through higher layer signaling that CMR0/1/2 can share a spatial domain base vector as well as a frequency domain base vector. For CMR0/1/2, the spatial base vector and the frequency base vector can be shared, the precoding matrix is expressed as:

Or alternatively

For CMR0/1/2, the space domain base vectors and the frequency domain base vectors can be shared, and assuming that the terminal obtains or selects the CSI-RS 0 as a reference resource according to a rule, the terminal feeds back the ratio of the amplitude coefficient associated with the kth frequency domain base vector of the jth space domain base vector of the CSI-RS1/2 relative to the amplitude coefficient associated with the kth frequency domain base vector of the jth space domain base vector of the CSI-RS 0 by using the following 2bit quantization table (low feedback overhead quantization table).

Then, the combined coefficient amplitude matrix associated with the 1/2 th CSI-RS is:

Where Am _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents a combined coefficient amplitude matrix associated with a reference CSI-RS (CSI-RS 0), and f _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents an offset value of an amplitude coefficient associated with an mth frequency domain base vector of the jth spatial base vector. For reference CSI-RS, f _2,j,m =1. Wherein the offset value needs to be indicated to the network with the sequence number of the quantization table.

S214, the network side equipment network determines the amplitude quantization value of the non-zero coefficient associated with each first CSI-RS according to the offset value associated with each first CSI-RS and the amplitude quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

For example, in the above example, the network side device obtains a corresponding value according to the sequence number of the quantization table fed back by the terminal, so as to obtain (CSI-RS 1 and CSI-RS 2 here) f _2,j,m of each CSI-RS. Further, the network side device can obtain the precoding matrix W according to the PMI information of the reference CSI-RS fed back by the terminal and the PMI information associated with the CSI-RS 3.

In another possible implementation manner, after the network side device indicates the first content information of the terminal, the terminal feeds back the PMI information of the reference CSI-RS and the phase quantization value of other CSI-RS in the K _i CSI-RS relative to the reference CSI-RS according to the first content information when feeding back the PMI parameter, so as to further reduce the phase quantization value indication overhead of the non-zero coefficient. Thus, in this possible implementation, as shown in fig. 4, the method may further comprise the steps of:

S211, the network side equipment receives PMI information of reference CSI-RSs and M _j phase quantization values associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RSs of K _i CSI-RSs sharing first information, the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information, M _j is the frequency domain base vector quantity associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1.

In this possible implementation, each first CSI-RS needs to be associated with M _j phase quantization values, and M _j phase quantization values associated with each first CSI-RS may or may not be the same. The M _j may be the number of frequency domain base vectors fed back by the terminal to the network side device, or the M _j may also be the number of frequency domain base vectors configured by the network side device.

S213, the network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to M _j phase quantization values associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

The network determines the phase quantization value of the non-zero coefficient associated with the ith CSI-RS according to the M _j phase quantization values associated with the ith CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS.

Or alternatively

For CMR0/1/2, the space domain base vector and the frequency domain base vector can be shared, and if the terminal obtains according to a rule or the terminal selects the CSI-RS 0as a reference resource, the terminal feeds back the phase quantization value of the amplitude coefficient associated with the mth frequency domain base vector of the CSI-RS 1/2. Then, the 1/2 th CSI-RS associated combined coefficient phase matrix is:

Wherein Phase _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents a combined coefficient Phase matrix associated with a reference CSI-RS (CSI-RS 0), and p _2,m,m＝0,…,M_i -1 represents a Phase quantization value associated with an mth frequency domain base vector. For reference CSI-RS, p _2,m = 1. In addition, the network side equipment further can obtain a precoding matrix W according to the PMI information of the reference CSI-RS and the PMI information associated with the CSI-RS3 fed back by the terminal.

In one possible implementation, each of the first CSI-RS may be associated with L _j or 2L _j phase quantization values, and thus, as shown in fig. 5, after S210, the method may further include the steps of:

S216, the network side equipment receives PMI information of reference CSI-RSs fed back by the terminal and L _j or 2L _j phase quantization values associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information, and L _j is the number of phase quantization values associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1.

In this possible implementation, each first CSI-RS needs to be associated with L _j or 2L _j phase quantization values, and the L _j or 2L _j phase quantization values associated with the respective first CSI-RS are not necessarily the same.

Optionally, the L _j is the number of spatial base vectors of one polarization direction fed back by the terminal to the network side device, or the number of spatial base vectors of one polarization direction configured by the network side device in L _j.

And S218, the network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to the L _j or 2L _j phase quantization values associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

The network side device may determine the phase quantization value of the non-zero coefficient associated with the i-th CSI-RS according to the L _j or 2L _j phase quantization values associated with the i-th CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS.

For example, the network configures 4 CSI-RSs (CMR 0/1/2/3) and indicates through higher layer signaling that CMR0/1/2 can share spatial domain base vectors as well as frequency domain base vectors. For CMR0/1/2, the spatial base vector and the frequency base vector can be shared, the precoding matrix is expressed as:

Or alternatively

For CMR0/1/2, the space domain base vector and the frequency domain base vector can be shared, and if the terminal obtains according to a rule or selects the CSI-RS 0 as a reference resource, the terminal feeds back the phase quantization value of the amplitude coefficient associated with the first space domain base vector of the CSI-RS 1/2. Then, the combined coefficient phase matrix of the 1 st polarization associated with the 1 st/2 th CSI-RS is:

The combined coefficient phase matrix of the 2 nd polarization associated with the 1/2 th CSI-RS is as follows:

Wherein Phase _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents a combined coefficient Phase matrix associated with a reference CSI-RS (CSI-RS 0), and p _2,l,l＝0,…,L_i -1 represents a Phase quantization value associated with a first spatial basis vector. For reference CSI-RS, p _2,l = 1. In addition, the network side equipment further can obtain a precoding matrix W according to the PMI information of the reference CSI-RS and the PMI information associated with the CSI-RS3 fed back by the terminal.

For another example, the network configures 4 CSI-RSs (CMR 0/1/2/3) and indicates through higher layer signaling that CMR0/1/2 can share spatial and frequency domain base vectors. For CMR0/1/2, the spatial base vector and the frequency base vector can be shared, the precoding matrix is expressed as:

Or alternatively

For CMR0/1/2, the space domain base vector and the frequency domain base vector can be shared, and if the terminal obtains according to a rule or selects the CSI-RS 0 as a reference resource, the terminal feeds back the phase quantization value of the amplitude coefficient associated with the first space domain base vector of the CSI-RS 1/2. Then, the 1/2 th CSI-RS associated combined coefficient phase matrix is:

Wherein Phase _2,j,m,j＝0,…,2L_i-1,m＝0,…,M_i -1 represents a combined coefficient Phase matrix associated with a reference CSI-RS (CSI-RS 0), and p _2,l,l＝0,…,2L_i -1 represents a Phase quantization value associated with a first spatial basis vector. For reference CSI-RS, p _2,l = 1. In addition, the network side equipment further can obtain a precoding matrix W according to the PMI information of the reference CSI-RS and the PMI information associated with the CSI-RS3 fed back by the terminal.

In another possible implementation manner, the terminal may further feed back one phase quantization value associated with each first CSI-RS, so, as shown in fig. 6, after S210, the method may further include:

S215, the network side equipment receives PMI information of reference CSI-RSs and 1 phase quantization value associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information.

In this possible implementation, each first CSI-RS needs to be associated with a phase quantization value, which is not necessarily the same for each first CSI-RS.

S217, the network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to the 1 phase quantization value associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

The network side device may determine the phase quantization value of the non-zero coefficient associated with the i-th CSI-RS according to the 1-th phase quantization value associated with the i-th CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS.

Or alternatively

For CMR 0/1/2, the space domain base vector and the frequency domain base vector can be shared, and assuming that the terminal obtains according to a rule or the terminal selects CSI-RS 0 as a reference resource, the 1/2 th CSI-RS associated combination coefficient phase matrix is:

Where P _i, i=1, 2 represents the phase quantization value associated with the i-th CSI-RS (non-CSI-RS 0). In addition, the network side equipment further can obtain a precoding matrix W according to the PMI information of the reference CSI-RS and the PMI information associated with the CSI-RS 3 fed back by the terminal. Alternatively, for reference resource CSI-RS 0, the network and terminal may assume their associated phase quantization value to be 1.

In one or more possible implementations, the network-side device may determine the reference CSI-RS by one of:

(1) Default rules agreed with the terminal.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, wherein the CSI-RS 0/1/2/3 share the first information, and the CSI-RS associated with the strongest coefficient is the reference RS by default.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured in the network side device, where CSI-RS 0/1/2/3 share the first information, and then the CSI-RS 0 with the smallest default ID is the reference RS. Or the CSI-RS 3 with the largest ID is the reference RS.

For example, the network side device configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 shares the first information and CSI-RS 2/3 shares the first information, CSI-RS 0 in the default resource group { CSI-RS 0/1} is the reference CSI-RS, and CSI-RS 2 in the default resource group { CSI-RS 2/3} is the reference CSI-RS.

For example, the network side device configures 4 CSI-RS (CSI-RS 0/1/2/3), where CSI-RS 0/1 share the first information and CSI-RS 2/3 share the first information, then CSI-RS 0 associated with the strongest coefficient in the default resource group { CSI-RS 0/1} is the reference CSI-RS, and CSI-RS 2 associated with the strongest coefficient in the default resource group { CSI-RS 2/3} is the reference CSI-RS. At this time, the terminal needs to feed back one strongest coefficient indication for each resource group, that is, feeds back two strongest coefficient indications altogether, and each strongest coefficient indication is associated with one default resource group. For both resource groups, the terminal may also need to feed back the amplitude difference or ratio between the resource groups.

(2) And the configuration of the network side equipment.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, wherein CSI-RS 0/1/2/3 shares the first information, and the network indicates that CSI-RS 0 is the reference RS.

For example, the network side device configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 shares the first information, CSI-RS 2/3 shares the first information, then the default resource group { CSI-RS 0/1}, the network indicates that CSI-RS 0 is the reference CSI-RS, the default resource group { CSI-RS 2/3}, and the network indicates that CSI-RS 2 is the reference CSI-RS.

(3) And feeding back the terminal.

For example, the network side device configures 4 CSI-RS (CSI-RS 0/1/2/3), where CSI-RS 0/1 share the first information and CSI-RS 2/3 share the first information, for CSI-RS 0/1, the terminal uses the 1-bit sequence to feed back CSI-RS 0 as the reference CSI-RS, and the terminal uses the 1-bit sequence to feed back CSI-RS 2 as the reference CSI-RS.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, wherein the CSI-RS 0/1/2/3 share the first information, and the terminal feeds back the CSI-RS 0 as a reference CSI-RS by using a 2bit sequence; or the CSI-RS associated with the strongest coefficient is defaulted to be the reference RS.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, where the CSI-RS 0/1/2 share the first information, and the terminal feeds back the CSI-RS 0 as a reference CSI-RS by using a 2bit sequence.

According to the technical scheme provided by the embodiment of the application, the network side equipment indicates that some PMI parameters can be shared among the partial CSI-RSs, so that feedback overhead is reduced. Further, the feedback overhead is further reduced by using a low-overhead amplitude quantization table or feeding back a small number of phase offset coefficients.

Fig. 7 is a flowchart illustrating a PMI information feedback method provided by an embodiment of the present application, where the method 700 may be performed by a terminal. In other words, the method may be performed by software or hardware installed on the terminal. Method 700 is a method performed by a terminal corresponding to method 200, and has an implementation corresponding to method 200, and is mainly described below with respect to the steps performed by the terminal, and other minor matters may be referred to in the related description of method 200. As shown in fig. 7, the method may include the following steps.

S710, the terminal acquires first content information indicated by the network side equipment, wherein the first content information comprises: and sharing first information between K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters, N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N is a preset value, and N is an integer greater than 0.

Wherein the first content information is the same as the first content information in the method 200, reference may be made specifically to the description in the method 200.

Wherein the first information may include at least one of:

the frequency domain base vector indication is used for indicating the frequency domain base vector associated with the CSI-RS;

a frequency domain base vector offset indication for indicating a CSI-RS associated frequency domain base vector offset;

Window starting position indication information of a frequency domain base vector window is used for indicating the frequency domain starting position of a frequency domain base vector window associated with the CSI-RS;

The space domain base vector indication is used for indicating the space domain base vector associated with the CSI-RS;

the strongest coefficient indication is used for indicating the space domain position and the frequency domain position of the strongest coefficient associated with the CSI-RS;

the non-zero coefficient indication is used for indicating the space domain position and the frequency domain position of the non-zero coefficient associated with the CSI-RS;

a non-zero coefficient number indication for indicating the number of non-zero coefficients associated with the CSI-RS;

the resource selection indication is used for indicating the CSI-RS associated with the PMI parameter fed back by the terminal;

The space-domain base vector quantity indication is used for indicating the space-domain base vector quantity associated with the CSI-RS;

the frequency domain base vector quantity indication is used for indicating the quantity of the frequency domain base vectors associated with the CSI-RS;

The number of airspace base vectors configured by the network;

Number of frequency domain basis vectors for network configuration.

S712, the terminal sends a CSI report, wherein for PMI information of K _i CSI-RSs sharing first information, PMI information of reference CSI-RSs is fed back in the CSI report, and the reference CSI-RSs are one of the K _i CSI-RSs.

In the embodiment of the present application, S710 and S712 may exist separately, for example, the terminal may acquire, according to S710, first content information indicated by the network side device, where the first content information includes: the first information is shared among K _i CSI-RSs in the N CSI-RSs, the first information can be PMI related parameters configured by a network, for example, the number of space domain base vectors, the number of frequency domain base vectors and the like, the terminal can determine that the same first information is used among K _i CSI-RSs according to the first content information, and therefore the expenditure of configuring the PMI related parameters for the terminal by network side equipment can be reduced. For another example, the terminal may determine that the first information is shared between K _i CSI-RSs in the N CSI-RSs by itself, where the first information may be a PMI parameter fed back by the terminal, for example, a frequency domain base vector indication, a spatial domain base vector indication, or a strongest coefficient indication, and in S712, for PMI information of K _i CSI-RSs sharing the first information, PMI information of a reference CSI-RS is fed back in the CSI report, where the reference CSI-RS is one CSI-RS in the K _i CSI-RSs, and for other CSI-RSs in the K _i CSI-RSs, offset values of these CSI-RSs relative to the reference CSI-RS may be fed back.

In one possible implementation manner, the obtaining, by the terminal, the first content information indicated by the network side device may include the following steps:

Step 1, the terminal acquires N CSI-RS resource groups in N CSI-RSs indicated by the network side equipment;

and step 2, the terminal determines that the CSI-RS in the same CSI-RS resource grouping shares the first information.

In the above possible implementation manner, optionally, a bit sequence length of the CSI-RS resource selection indication in the first portion of the CSI report is determined according to the number n of CSI-RS resource packets. In this possible implementation manner, the network side device may display or implicitly indicate one or more CSI-RS resource packets in the N CSI-RS, where the CSI-RS resource selection indication bit sequence (bitmap) length or bit number in CSI part1 is determined according to the number of CSI-RS resource packets, where each CSI-RS resource packet is made up of K _i CSI-RS resources sharing the first information.

In one possible implementation manner, in a case that the terminal does not support the network side device to instruct or configure the terminal to feed back CSI associated with a partial CSI-RS in the K _i CSI-RS, a CSI-RS resource selection indication field in a first part of the CSI report indicates a partial CSI-RS selected by the terminal from the N CSI-RS.

For example, the network configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 shares first information, CSI-RS 2/3 shares first information, and when the terminal does not support network indication or configures the terminal to feedback CSI associated with a Part of CSI-RS in K _i CSI-RS, the sequence length of a first field in CSI Part1 fed back by the terminal (used to indicate a selection result of the terminal to select the Part of CSI-RS from the 4 CSI-RS) is 2 bits, where the first bit corresponds to CSI-RS 0/1, and the second bit corresponds to CSI-RS 2/3.

For another example, the network configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 share the first information, CSI-RS2/3 share the first information, and when the terminal does not support the network indication or configures CSI associated with a Part of CSI-RS in the K _i CSI-RSs for feedback by the terminal, and the sequence length of the first field in CSI Part1 fed back by the terminal is n=4, the values of bits associated with CSI-RS 0/1 are the same, i.e. all 1 or all 0. The value of the associated bit of the CSI-RS2/3 is the same, namely all 1 or all 0.

For another example, 4 CSI-RSs (CSI-RSs 0/1/2/3) are configured in the network, where the CSI-RSs 0/1/2/3 share the first information, and when the terminal does not support the network indication or configures CSI associated with a Part of the CSI-RSs in the K _i CSI-RSs for feedback by the terminal, the sequence length of the first field in CSI Part1 fed back by the terminal (which is used to indicate the selection result of the terminal to select the Part of the CSI-RSs from the 4 CSI-RSs) is 0bit, that is, the terminal does not perform CSI-RS selection.

For another example, 4 CSI-RSs (CSI-RS 0/1/2/3) are configured in the network, where the CSI-RS 0/1/2/3 share the first information, and when the terminal does not support the network to instruct or configure CSI associated with Part of CSI-RS in the terminal feedback K _i CSI-RSs, and the sequence length of the first field in the CSI Part1 fed back by the terminal is n=4, the values of bits associated with the CSI-RS 0/1/2/3 are the same, that is, all 1 or all 0.

For another example, 4 CSI-RSs (CSI-RSs 0/1/2/3) are configured in the network, where CSI-RSs 0/1/2 share the first information, and when the terminal does not support network indication or configures CSI associated with a Part of CSI-RSs in K _i CSI-RSs for feedback by the terminal, a sequence length of a first field in CSI Part1 (used to indicate a selection result of the terminal to select the Part of CSI-RSs from the 4 CSI-RSs) fed back by the terminal is 2 bits, where the first bit corresponds to CSI-RS 0/1/2, and the second bit corresponds to CSI-RS 3.

For another example, the network configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1/2 share the first information, and when the terminal does not support the network indication or configures CSI associated with a Part of CSI-RS in the K _i CSI-RSs for feedback by the terminal, and the sequence length of the first field in CSI Part1 fed back by the terminal is n=4, the values of bits associated with CSI-RS 0/1/2 are the same, that is, all 1 or all 0.

Through the possible implementation manner, the terminal can not support network indication or configure the terminal to feed back the CSI associated with part of the CSI-RS in the K _i CSI-RSs; or the terminal indicates the network side equipment under the condition that the terminal does not support network indication or the terminal is configured to feed back the CSI associated with part of the CSI-RSs in the N CSI-RSs, so that the terminal can be consistent with the understanding of the network side equipment.

In one possible implementation manner, the obtaining, by the terminal, the first content information indicated by the network side device may include: the terminal receives a high-layer signaling sent by the network side device, and obtains n pieces of indication information included in the high-layer information, wherein the ith indication information is used for indicating K _i pieces of CSI-RS sharing first information.

The possible implementation of the higher layer signaling may be referred to as related description in the method 200, and will not be described herein.

In one possible implementation, the sending, by the terminal, the CSI report may include:

Step 1, the terminal obtains amplitude offset values of the amplitude of the reference non-zero coefficient associated with each first CSI-RS relative to the reference non-zero coefficient associated with the reference CSI-RS, wherein the first CSI-RS are CSI-RS except for the reference CSI-RS in the K _i CSI-RS sharing the first information, and the amplitude offset values are quantization values in a first quantization table.

And step 2, the terminal feeds back each amplitude offset value in the CSI report.

For example, for a non-zero coefficient associated with any one of the K _i -1 first CSI-RS, the terminal calculates an amplitude offset value (which may be a difference value or a ratio value) of the non-zero coefficient and an associated reference non-zero coefficient, and performs quantization feedback on the offset value by using the first quantization table. Wherein the reference non-zero coefficient is a reference CSI-RS associated non-zero coefficient. Wherein, a reference non-zero coefficient associated with a non-zero coefficient associated with any CSI-RS is the reference non-zero coefficient with the same position as the non-zero coefficient in the reference non-zero coefficient.

Wherein the first quantization table may be a low feedback overhead quantization table.

In another possible implementation manner, the terminal sending the CSI report may include:

Step 1, the terminal obtains M _j phase quantization values associated with each first CSI-RS, where M _j is the number of frequency domain base vectors associated with the j-th first CSI-RS, j=1, 2, …, K _i -1, and the first CSI-RS are CSI-RS except the reference CSI-RS in the K _i CSI-RS sharing the first information;

And 2, the terminal feeds back M _j phase quantized values associated with each first CSI-RS in the CSI report.

For K _i CSI-RSs sharing the first information, the terminal determines one reference CSI-RS or feeds back the reference CSI-RS according to network configuration or default rules, and for any one of the rest K _i -1 CSI-RSs, the terminal feeds back M _j phase quantization values. Wherein M _j is the number of frequency domain base vectors associated with the CSI-RS (the number may be terminal feedback or network configuration).

In yet another possible implementation manner, the terminal sending the CSI report may include:

step 1, the terminal obtains L _j or 2L _j phase quantization values associated with each first CSI-RS, where the first CSI-RS are CSI-RS except the reference CSI-RS in the K _i CSI-RS sharing the first information, L _j is the number of spatial base vectors of one polarization direction associated with the j-th first CSI-RS, and j=1, 2, …, K _i -1;

And step 2, the terminal feeds back L _j or 2L _j phase quantization values associated with each first CSI-RS in the CSI report.

For example, for K _i CSI-RS sharing the first information, the terminal determines one reference CSI-RS or the terminal feeds back the reference CSI-RS according to the network configuration or the default rule, and for any one of the remaining K _i -1 CSI-RS, the terminal feeds back L _j or 2L _j phase quantization values. Wherein L _j is the number of spatial base vectors of one polarization direction associated with the CSI-RS (the number may be terminal feedback or network configuration);

In one possible implementation, the terminal sending the CSI report may include:

Step 1, the terminal acquires 1 phase quantization value associated with each first CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information;

and step 2, the terminal feeds back the phase quantization value associated with each first CSI-RS in the CSI report.

For example, for K _i CSI-RS sharing the first information, the terminal determines one reference CSI-RS according to the network configuration or default rule, and for any one of the remaining K _i -1 CSI-RS, the terminal feeds back 1 phase quantization value.

In one or more possible implementations, the reference CSI-RS is determined according to one of:

(1) Default rules agreed with the network side equipment.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, where the CSI-RS 0/1/2/3 share the first information, the network side device and the terminal may agree on the CSI-RS associated with the default strongest coefficient as the reference RS.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured in the network side device, where the CSI-RS 0/1/2/3 share the first information, the network side device and the terminal may agree on the CSI-RS 0 with the smallest default ID as the reference RS, or the CSI-RS 3 with the largest ID as the reference RS.

For example, the network side device configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 shares the first information and CSI-RS 2/3 shares the first information, so that the network side device and the terminal may agree on CSI-RS0 in the default resource group { CSI-RS 0/1} as the reference CSI-RS, and the network side device and the terminal may agree on CSI-RS 2 in the default resource group { CSI-RS 2/3} as the reference CSI-RS.

(2) And the configuration of the network side equipment.

For example, 4 CSI-RS (CSI-RS 0/1/2/3) are configured at the network side device, where CSI-RS 0/1/2/3 share the first information, and the network side device indicates CSI-RS 0 as the reference RS.

For example, the network side device configures 4 CSI-RSs (CSI-RS 0/1/2/3), where CSI-RS 0/1 shares the first information, CSI-RS 2/3 shares the first information, then the default resource group { CSI-RS 0/1}, the network indicates that CSI-RS 0 is the reference CSI-RS, the default resource group { CSI-RS 2/3}, and the network side device indicates that CSI-RS 2 is the reference CSI-RS.

(3) And feeding back the terminal.

In the above technical solution provided in the embodiment of the present application, the network indicates, through a higher layer signaling, which reference resources share first information, where the first information includes some configuration parameters and feedback parameters; the terminal does not support network indication or configures the terminal to feed back the CSI associated with part of CSI-RSs in the K _i CSI-RSs; or the terminal does not support network indication or configures the terminal to feed back the CSI associated with part of CSI-RSs in the N CSI-RSs; under the condition that K _i CSI-RSs share first information, the UE selects an associated bitmap design; for shared CSI-RS, acquiring a default rule or feeding back a reference CSI-RS by a terminal, and for non-reference CSI-RS, feeding back an amplitude coefficient difference value by the terminal by using a low-overhead quantization table; for shared CSI-RS, acquiring a default rule or feeding back a reference CSI-RS by a terminal, and for non-reference CSI-RS, feeding back a phase offset value by each CSI-RS of the terminal; for shared CSI-RS, a default rule obtains or feeds back a reference CSI-RS by a terminal, and for non-reference CSI-RS, each CSI-RS of the terminal feeds back K phase offset values, wherein K is the number of FD/SD base vectors fed back by the terminal. Thus, feedback overhead of the PMI parameter can be reduced.

According to the PMI parameter sharing method provided by the embodiment of the application, the execution main body can be a PMI parameter sharing device. In the embodiment of the present application, a method for sharing PMI parameters by a PMI parameter sharing device is taken as an example, and the PMI parameter sharing device provided in the embodiment of the present application is described.

Fig. 8 shows a schematic structural diagram of a PMI parameter sharing apparatus according to an embodiment of the present application, and as shown in fig. 8, the apparatus 800 mainly includes: a determination module 801 and an indication module 802.

In an embodiment of the present application, the determining module 801 is configured to determine first content information, where the first content information includes: sharing first information between K _i CSI-RSs in the N channel state information reference signals (CSI-RSs), wherein the first information is used for indicating PMI related parameters; an indication module 802, configured to indicate the first content information of the terminal; wherein N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0.

In one possible implementation, the first information includes at least one of: the frequency domain base vector indication is used for indicating the frequency domain base vector associated with the CSI-RS; a frequency domain base vector offset indication for indicating a CSI-RS associated frequency domain base vector offset; window starting position indication information of a frequency domain base vector window is used for indicating the frequency domain starting position of a frequency domain base vector window associated with the CSI-RS; the space domain base vector indication is used for indicating the space domain base vector associated with the CSI-RS; the strongest coefficient indication is used for indicating the space domain position and the frequency domain position of the strongest coefficient associated with the CSI-RS; the non-zero coefficient indication is used for indicating the space domain position and the frequency domain position of the non-zero coefficient associated with the CSI-RS; a non-zero coefficient number indication for indicating the number of non-zero coefficients associated with the CSI-RS; the resource selection indication is used for indicating the CSI-RS associated with the PMI parameter fed back by the terminal; the space-domain base vector quantity indication is used for indicating the space-domain base vector quantity associated with the CSI-RS; the frequency domain base vector quantity indication is used for indicating the quantity of the frequency domain base vectors associated with the CSI-RS; the number of airspace base vectors configured by the network; number of frequency domain basis vectors for network configuration.

In one possible implementation, the indicating module 802 indicates the terminal first content information, including: and indicating N CSI-RS resource groups in the N CSI-RSs, wherein the ith CSI-RS resource group comprises K _i CSI-RSs sharing the first information.

In one possible implementation, the indicating module 802 indicates the terminal first content information, including: the first content information is indicated by higher layer signaling.

In one possible implementation, the apparatus further includes:

The receiving module is used for receiving PMI information of reference CSI-RSs fed back by the terminal and amplitude offset values of non-zero coefficients associated with each first CSI-RS, wherein the amplitude offset values are offset values of the amplitudes of the non-zero coefficients associated with the first CSI-RSs relative to the amplitudes of the non-zero coefficients associated with the reference CSI, the amplitude offset values are quantized values in a first quantization table, the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except for the reference CSI-RSs in the K _i CSI-RSs sharing the first information;

The determining module is further configured to determine an amplitude quantization value of the non-zero coefficient associated with each first CSI-RS according to the offset value associated with each first CSI-RS and the amplitude quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

In one possible implementation, the apparatus further includes:

A receiving module, configured to receive PMI information of a reference CSI-RS fed back by the terminal and M _j phase quantization values associated with each first CSI-RS, where the reference CSI-RS is one CSI-RS of K _i CSI-RS sharing first information, the first CSI-RS are CSI-RS except for the reference CSI-RS in K _i CSI-RS sharing first information, and M _j is a frequency domain base vector number associated with a j-th first CSI-RS, where j=1, 2, …, and K _i -1;

The determining module is further configured to determine, according to M _j phase quantization values associated with each first CSI-RS and the phase quantization values of the non-zero coefficients associated with the reference CSI-RS indicated by the PMI information, the phase quantization values of the non-zero coefficients associated with each first CSI-RS.

In one possible implementation manner, the M _j is the number of frequency domain base vectors fed back by the terminal to the network side device, or the M _j is the number of frequency domain base vectors configured by the network side device.

In one possible implementation, the apparatus further includes:

The receiving module is used for receiving PMI information of reference CSI-RSs fed back by the terminal and L _j or 2L _j phase quantization values associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing first information, and L _j is the number of phase quantization values associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1;

The determining module 801 is further configured to determine a phase quantization value of a non-zero coefficient associated with each first CSI-RS according to L _j or 2L _j phase quantization values associated with each first CSI-RS and a phase quantization value of a non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

In one possible implementation manner, the L _j is the number of airspace base vectors of one polarization direction fed back by the terminal to the network side device, or the number of airspace base vectors of one polarization direction configured by the network side device in L _j.

In one possible implementation, the apparatus further includes:

The receiving module is used for receiving PMI information of reference CSI-RSs fed back by the terminal and 1 phase quantization value associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information;

The determining module 801 is further configured to determine a phase quantization value of a non-zero coefficient associated with each first CSI-RS according to 1 phase quantization value associated with each first CSI-RS and a phase quantization value of a non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

In one possible implementation, the determining module 801 is further configured to determine a reference CSI-RS of K _i CSI-RS sharing the first information according to one of:

Default rules agreed with the terminal;

The configuration of the network side equipment;

and feeding back the terminal.

In one possible implementation manner, the determining module is further configured to obtain a precoding matrix according to PMI information of N reference CSI-RS and PMI information of a second CSI-RS fed back by the terminal, where the second CSI-RS is a CSI-RS other than K _i CSI-RS sharing the first information in the N CSI-RS.

The PMI parameter sharing device provided by the embodiment of the application can realize each process realized by the network side device in the method embodiment of fig. 2 to 7 and achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

Fig. 9 shows a schematic structural diagram of a PMI information feedback apparatus according to an embodiment of the present application, and as shown in fig. 9, the apparatus 900 mainly includes: an acquisition module 901 and a transmission module 902.

In the embodiment of the present application, an obtaining module 901 is configured to obtain first content information indicated by a network side device, where the first content information includes: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; a sending module 902, configured to send a CSI report, where, for PMI information of the K _i CSI-RS, PMI information of a reference CSI-RS is fed back in the CSI report, where the reference CSI-RS is one CSI-RS of the K _i CSI-RS; wherein N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N being a predetermined value and N being an integer greater than 0.

In one possible implementation manner, the acquiring module 901 acquires first content information indicated by the network side device, including:

Acquiring N CSI-RS resource groups in N CSI-RSs indicated by the network side equipment;

and determining that the CSI-RSs in the same CSI-RS resource grouping share the first information.

In one possible implementation, the bit sequence length of the CSI-RS resource selection indication in the first part of the CSI report is determined according to the number n of CSI-RS resource packets.

In one possible implementation, the CSI-RS resource selection in the first portion of the CSI report indicates the partial CSI-RS selected by the terminal from the N CSI-RS without supporting network side equipment to indicate or configure to feed back the CSI associated with the partial CSI-RS in the K _i CSI-RS.

And receiving a high-layer signaling sent by the network side equipment, and acquiring n pieces of indication information included in the high-layer information, wherein the ith indication information is used for indicating K _i CSI-RSs sharing the first information.

In one possible implementation, the sending module 902 sends the CSI report, including:

Acquiring amplitude offset values of the amplitude of reference non-zero coefficients associated with each first CSI-RS relative to the reference non-zero coefficients associated with the reference CSI-RS, wherein the first CSI-RS is one of K _i CSI-RSs sharing first information except the reference CSI-RS, and the amplitude offset values are quantization values in a first quantization table;

and feeding back each amplitude offset value in the CSI report.

Obtaining M _j phase quantized values associated with each first CSI-RS, wherein M _j is the frequency domain base vector quantity associated with the j-th first CSI-RS, j=1, 2, … and K _i -1, and the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information;

And feeding back M _j phase quantized values associated with each first CSI-RS in the CSI report.

Acquiring L _j or 2L _j phase quantization values associated with each first CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information, L _j is the number of spatial vector vectors of one polarization direction associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1;

And feeding back L _j or 2L _j phase quantized values associated with each first CSI-RS in the CSI report.

Acquiring 1 phase quantization value associated with each first CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information;

And feeding back the phase quantized values associated with the first CSI-RSs in the CSI reports.

In one possible implementation, the reference CSI-RS is determined according to one of:

Default rules agreed with the network side equipment;

The configuration of the network side equipment;

and feeding back the terminal.

The feedback device of PMI information in the embodiment of the application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, the terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the present application are not limited in detail.

The PMI information feedback device provided by the embodiment of the application can realize each process realized by the terminal in the method embodiment of fig. 2 to 7, and achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

Optionally, as shown in fig. 10, the embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002, where the memory 1002 stores a program or an instruction that can be executed on the processor 1001, for example, when the communication device 1000 is a terminal, the program or the instruction is executed by the processor 1001 to implement the steps of the PMI information feedback method embodiment, and the same technical effects can be achieved. When the communication device 1000 is a network side device, the program or the instruction implements the steps of the PMI parameter sharing method embodiment when executed by the processor 1001, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal which comprises a processor and a communication interface, wherein the processor is used for realizing the steps of the PMI information feedback method embodiment, and the communication interface is used for communicating with external equipment. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 11 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 1100 includes, but is not limited to: at least part of the components of the radio frequency unit 1101, the network module 1102, the audio output unit 1103, the input unit 1104, the sensor 1105, the display unit 1106, the user input unit 1107, the interface unit 1108, the memory 1109, and the processor 1110, etc.

Those skilled in the art will appreciate that the terminal 1100 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 1110 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 11 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine some components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1104 may include a graphics processing unit (Graphics Processing Unit, GPU) 11041 and a microphone 11042, the graphics processor 11041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes at least one of a touch panel 11071 and other input devices 11072. The touch panel 11071 is also referred to as a touch screen. The touch panel 11071 may include two parts, a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1101 may transmit the downlink data to the processor 1110 for processing; in addition, the radio frequency unit 1101 may send uplink data to the network side device. Typically, the radio frequency unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 1109 may be used to store software programs or instructions and various data. The memory 1109 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 1109 may include volatile memory or nonvolatile memory, or the memory 1109 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (Double DATA RATE SDRAM, DDRSDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCH LINK DRAM, SLDRAM), and Direct random access memory (DRRAM). Memory 1109 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1110.

The processor 1110 is configured to obtain first content information indicated by a network side device, where the first content information includes: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; a radio frequency unit 1101, configured to send a CSI report, where, for PMI information of the K _i CSI-RS, PMI information of a reference CSI-RS is fed back in the CSI report, where the reference CSI-RS is one CSI-RS of the K _i CSI-RS;

The embodiment of the application also provides a network side device which comprises a processor and a communication interface, wherein the processor is used for realizing the steps of the PMI parameter sharing method embodiment, and the communication interface is used for being carried out with external equipment. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 12, the network side device 1200 includes: an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204, and a memory 1205. The antenna 1201 is connected to a radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information via the antenna 1201 and transmits the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes information to be transmitted, and transmits the processed information to the radio frequency device 1202, and the radio frequency device 1202 processes the received information and transmits the processed information through the antenna 1201.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 1203, and the baseband apparatus 1203 includes a baseband processor.

The baseband device 1203 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 12, where one chip, for example, a baseband processor, is connected to the memory 1205 through a bus interface, so as to call a program in the memory 1205 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 1206, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 1200 of the embodiment of the present invention further includes: instructions or programs stored in the memory 1205 and executable on the processor 1204, the processor 1204 invokes the instructions or programs in the memory 1205 to perform the method performed by the modules shown in fig. 9 and achieve the same technical effects, and are not described herein in detail for the sake of avoiding repetition.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, where the program or the instruction implements each process of the PMI parameter sharing method embodiment or each process of the PMI information feedback method embodiment when executed by a processor, and the process can achieve the same technical effect, so that repetition is avoided and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or an instruction, implementing each process of the embodiment of the method for sharing the PMI parameter or implementing each process of the embodiment of the method for feeding back the PMI information, and the same technical effect can be achieved, so that repetition is avoided, and no redundant description is provided herein.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement each process of the above-mentioned PMI parameter sharing method embodiment, or implement each process of the above-mentioned PMI information feedback method embodiment, and achieve the same technical effect, so that repetition is avoided and no further description is given here.

The embodiment of the application also provides a PMI parameter sharing system, which comprises: the terminal can be used for executing the steps of the PMI information feedback method, and the network side device can be used for executing the steps of the PMI parameter sharing method.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A feedback method of PMI information, comprising:

The terminal acquires first content information indicated by the network side equipment, wherein the first content information comprises: sharing first information among K _i CSI-RSs in the N CSI-RSs, wherein the first information is used for indicating PMI related parameters; and/or the number of the groups of groups,

The terminal sends a CSI report, wherein for PMI information of K _i CSI-RSs sharing the first information, PMI information of reference CSI-RSs is fed back in the CSI report, and the reference CSI-RSs are one of the K _i CSI-RSs;

2. The method of claim 1, wherein the first information comprises at least one of:

The number of airspace base vectors configured by the network;

Number of frequency domain basis vectors for network configuration.

3. The method according to claim 1, wherein the terminal obtains first content information indicated by the network side device, including:

The terminal acquires N CSI-RS resource groups in N CSI-RSs indicated by the network side equipment;

and the terminal determines that the CSI-RSs in the same CSI-RS resource grouping share the first information.

4. The method of claim 3, wherein a bit sequence length of a CSI-RS resource selection indication in the first portion of the CSI report is determined according to a number n of CSI-RS resource packets.

5. The method of claim 4, wherein a CSI-RS resource selection indication field in a first portion of the CSI report indicates a partial CSI-RS selected by the terminal from the N CSI-RS if the terminal does not support network side equipment to indicate or configure the terminal to feed back CSI associated with the partial CSI-RS of the K _i CSI-RS.

6. The method according to claim 1, wherein the terminal obtains first content information indicated by the network side device, including:

The terminal receives a high-layer signaling sent by the network side device, and obtains n pieces of indication information included in the high-layer signaling, wherein the ith indication information is used for indicating K _i pieces of CSI-RS sharing first information.

7. The method according to any of claims 1 to 6, wherein the terminal transmits CSI reports comprising:

The terminal obtains amplitude offset values of the amplitude of the reference non-zero coefficient associated with each first CSI-RS relative to the amplitude of the reference non-zero coefficient associated with the reference CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information, and the amplitude offset values are quantized values in a first quantized table;

and the terminal feeds back each amplitude offset value in the CSI report.

8. The method according to any of claims 1 to 6, wherein the terminal transmits CSI reports comprising:

The terminal obtains M _j phase quantized values associated with each first CSI-RS, wherein M _j is the frequency domain base vector quantity associated with the j-th first CSI-RS, j=1, 2, … and K _i -1, and the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information;

and the terminal feeds back M _j phase quantized values associated with each first CSI-RS in the CSI report.

9. The method according to any of claims 1 to 6, wherein the terminal transmits CSI reports comprising:

The terminal obtains L _j or 2L _j phase quantization values associated with each first CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information, L _j is the number of spatial base vectors of one polarization direction associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1;

The terminal feeds back L _j or 2L _j phase quantization values associated with each first CSI-RS in the CSI report.

10. The method according to any of claims 1 to 6, wherein the terminal transmits CSI reports comprising:

the terminal acquires 1 phase quantization value associated with each first CSI-RS, wherein the first CSI-RS is the CSI-RS except the reference CSI-RS in the K _i CSI-RSs sharing the first information;

and the terminal feeds back the phase quantized values associated with the first CSI-RSs in the CSI reports.

11. The method according to any of claims 1 to 6, wherein the reference CSI-RS is determined according to one of:

Default rules agreed with the network side equipment;

The configuration of the network side equipment;

and feeding back the terminal.

12. The method for sharing the PMI parameter indicated by the precoding matrix is characterized by comprising the following steps:

The network side equipment indicates first content information of a terminal, wherein the first content information comprises: first information is shared among K _i CSI-RSs in the N channel state information reference signals CSI-RS, where the first information is used to indicate PMI related parameters, N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N is a predetermined value, and N is an integer greater than 0.

13. The method of claim 12, wherein the first information comprises at least one of:

The number of airspace base vectors configured by the network;

Number of frequency domain basis vectors for network configuration.

14. The method according to claim 12, wherein the network side device indicates the terminal first content information, comprising:

The network side equipment indicates N CSI-RS resource groups in the N CSI-RSs, wherein the ith CSI-RS resource group comprises K _i CSI-RSs sharing the first information.

15. The method according to claim 12, wherein the network side device indicates the terminal first content information, comprising:

the network side equipment indicates the first content information through high-level signaling.

16. The method according to any one of claims 12 to 15, wherein after the network-side device indicates the terminal first content information, the method further comprises:

The network side equipment receives PMI information of reference CSI-RSs fed back by the terminal and amplitude offset values of non-zero coefficients associated with each first CSI-RS, wherein the amplitude offset values are offset values of the amplitudes of the non-zero coefficients associated with the first CSI-RSs relative to the amplitudes of the non-zero coefficients associated with the reference CSI, the amplitude offset values are quantized values in a first quantization table, the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except for the reference CSI-RSs in the K _i CSI-RSs sharing the first information;

The network side equipment determines the amplitude quantization value of the non-zero coefficient associated with each first CSI-RS according to the offset value associated with each first CSI-RS and the amplitude quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

17. The method according to any one of claims 12 to 15, wherein after the network-side device indicates the terminal first content information, the method further comprises:

The network side equipment receives PMI information of reference CSI-RSs and M _j phase quantization values associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information, M _j is the frequency domain base vector quantity associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1;

The network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to M _j phase quantization values associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

18. The method of claim 17, wherein the M _j is a number of frequency domain base vectors fed back by the terminal to the network side device, or the M _j is a number of frequency domain base vectors configured by the network side device.

19. The method according to any one of claims 12 to 15, wherein after the network-side device indicates the terminal first content information, the method further comprises:

The network side equipment receives PMI information of reference CSI-RSs fed back by the terminal and L _j or 2L _j phase quantization values associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing first information, L _j is the number of phase quantization values associated with the j-th first CSI-RS, and j=1, 2, … and K _i -1;

the network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to the L _j or 2L _j phase quantization values associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

20. The method of claim 19, wherein the L _j is a number of spatial base vectors of one polarization direction fed back by the terminal to the network side device, or a number of spatial base vectors of one polarization direction configured by the network side device of the L _j.

21. The method according to any one of claims 12 to 15, wherein after the network-side device indicates the terminal first content information, the method further comprises:

The network side equipment receives PMI information of reference CSI-RSs and 1 phase quantization value associated with each first CSI-RS, wherein the reference CSI-RSs are one CSI-RS of K _i CSI-RSs sharing first information, and the first CSI-RSs are CSI-RSs except the reference CSI-RSs in the K _i CSI-RSs sharing the first information;

The network side equipment determines the phase quantization value of the non-zero coefficient associated with each first CSI-RS according to the 1 phase quantization value associated with each first CSI-RS and the phase quantization value of the non-zero coefficient associated with the reference CSI-RS indicated by the PMI information.

22. The method according to any one of claims 16 to 21, wherein before the network side device receives PMI information of the reference CSI-RS fed back by the terminal, the method further comprises:

The network side device determines a reference CSI-RS in K _i CSI-RSs sharing first information according to one of the following:

Default rules agreed with the terminal;

The configuration of the network side equipment;

and feeding back the terminal.

23. The method according to any one of claims 16 to 21, wherein after the network side device receives PMI information of the reference CSI-RS fed back by the terminal, the method further comprises:

The network side equipment acquires a precoding matrix according to PMI information of N reference CSI-RSs and PMI information of a second CSI-RS fed back by the terminal, wherein the second CSI-RS is the CSI-RS except for K _i CSI-RSs sharing the first information in the N CSI-RSs.

24. A PMI parameter sharing apparatus, comprising:

A determining module, configured to determine first content information, where the first content information includes: sharing first information between K _i CSI-RSs in the N channel state information reference signals CSI-RSs, wherein the first information is used for indicating PMI related parameters, N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N is a preset value, and N is an integer greater than 0;

And the indication module is used for indicating the first content information of the terminal.

25. A feedback device for PMI information, comprising:

The device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring first content information indicated by network side equipment, and the first content information comprises: sharing first information between K _i CSI-RS of the N CSI-RS, where the first information is used to indicate a PMI related parameter, N is an integer greater than 0, K _i is an integer less than or equal to N, i=1, 2, …, N, N is a predetermined value, and N is an integer greater than 0; and/or the number of the groups of groups,

A sending module, configured to send a CSI report, where, for PMI information of the K _i CSI-RS, PMI information of a reference CSI-RS is fed back in the CSI report, where the reference CSI-RS is one CSI-RS of the K _i CSI-RS.

26. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the PMI parameter sharing method of any of claims 12 to 23.

27. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the PMI information feedback method according to any of claims 1 to 12.

28. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, which when executed by a processor, implements the steps of the PMI parameter sharing method of any of claims 12 to 23, or implements the steps of the PMI information feedback method of any of claims 1 to 12.