CN105634577A - Method and device of calculating and feeding back channel quality indicator (CQI), and user scheduling method and device based on CQI - Google Patents

Abstract

The present invention provides a method and device for calculating and feeding back CQI and user scheduling based on the CQI. The present invention provides a method and device for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system; and a method and device for user scheduling of a 3D channel in a base station of a wireless communication system device. Compared with the prior art, the method for calculating and feeding back the CSI of the 3D channel in the user equipment of the wireless communication system provided by the present invention can perform calculation and feedback for the horizontal channel and the vertical channel. The method for user scheduling of the 3D channel in the base station of the communication system can determine the MIMO mode based on the CSI feedback information received from the user equipment for the horizontal channel and the vertical channel, and perform user pairing accordingly, thereby realizing the 3D channel Effective user scheduling in .

Description

A method and device for calculating and feeding back CQI and user scheduling based on the CQI

technical field

The invention relates to the field of wireless communication, in particular to the field of CQI calculation and feedback for wireless communication and the field of user scheduling.

Background technique

In LTE systems, two-dimensional (2D) transmission has been widely studied and adopted. Traditional antenna arrays are arranged horizontally to form beams in the horizontal plane. In order to exploit more spatial gain of three-dimensional (3D) space, a 3D multiple-input multiple-output (MIMO) channel propagation model has been discussed and modeled in a recent 3GPP meeting. In 3DMIMO channels, area array antennas can be employed to obtain vertical space as well as horizontal space gain. For 3DMIMO, many independent processing schemes based on vertical channels and horizontal channels have been proposed. Therefore, how to calculate and feed back the CSI (ChannelStateInformation, channel state information) of the 3D channel, and based on this, the user scheduling of the 3D channel is worth studying.

Contents of the invention

The purpose of the present invention is to provide a method and device for calculating and feeding back the CSI of a 3D channel in a user equipment of a wireless communication system, and a method and device for user scheduling of a 3D channel in a base station of a wireless communication system device.

According to one aspect of the present invention, there is provided a method for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system, wherein the wireless communication system uses CSI for the horizontal channel and the vertical channel respectively for the 3D channel Horizontal codebook and vertical codebook, the method includes:

- based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, determine the precoding matrix indicator PMI _h,i for the horizontal channel of the user equipment, hereinafter denoted as user equipment i, It is denoted as W _h,i in the following formulae;

- Based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, determine the precoding matrix indicator PMI _v, i used by the user equipment i for the vertical channel, which is denoted as W in the following formula _v,i ;

- based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine the best partner for the user equipment i for the horizontal channel Indicate BCI _h,i , which is denoted as W _h,j in the following formula, where it is assumed that the best partner for the horizontal channel is user equipment j;

- based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine the best partner for the user equipment i for the vertical channel Indicate BCI _v,i , which is denoted as W _v,j in the following formula, where it is assumed that the best partner for the vertical channel is user equipment j;

- Based on the W _h,i and W _v,i , determine the user equipment i in SU-MIMO mode according to the following formula

Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i;

- Based on the W _h,i , W _v,i , W _h,j and W _v,j , determine the user equipment i in MU-MIMO mode according to the following formula

Among them, ξ(W _v,j ,W _h,j ) is the combined function of W _h,j and W _v,j , and P _MU is the signal power in MU-MIMO mode;

- will indicate said PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as information is sent to the base station.

According to the above method, which also includes:

- Determine based on the following formula when only the horizontal channel is used for transmission

- Determine based on the following formula when only the transmission is performed based on the vertical channel

According to the method above, which also includes:

-according to as well as Determine the preferred dimension for performing space division multiplexing of the user equipment i based on the following formula, wherein the preferred dimension is a horizontal dimension or a vertical dimension:

when , determine the horizontal dimension as the preferred dimension, otherwise, determine the vertical dimension as the preferred dimension;

- when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as

- sending information indicating said preferred dimensions to a base station;

- will instruct as described information is sent to the base station.

According to the above method, which also includes:

- will instruct as described as well as information is sent to the base station.

According to the above method, which also includes:

- when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as

will instruct the information is sent to the base station.

According to the above method, which also includes:

- sending to the base station information indicating the number R _h,i of ranks allocated to the user equipment i in the horizontal domain;

- Sending information indicating the number _Rv,i of ranks allocated to the user equipment i in the vertical domain to the base station.

According to another aspect of the present invention, there is provided a method for user scheduling of a 3D channel in a base station of a wireless communication system, wherein the wireless communication system uses a horizontal codebook and a vertical codebook for the 3D channel respectively Horizontal channel and vertical channel, the method includes:

- receiving from the user equipment, hereinafter denoted user equipment i, the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as

- Determine the MIMO mode of the user equipment i according to each piece of information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode;

- When the MIMO mode of the user equipment i is the MU-MIMO mode, determining a paired user equipment of the user equipment i based on various information received from the user equipment i.

According to the above user scheduling method, wherein the step of determining the MIMO mode of the user equipment i according to the information received from the user equipment i includes:

- According to each information received from the user equipment i, determine the first MIMO mode of the user equipment i according to the following formula:

-when determining that the first MIMO mode of the user equipment i is a SU-MIMO mode;

-when The first MIMO mode of the user equipment i is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j;

Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, the step of determining the paired user equipment of the user equipment i includes:

- When the first MIMO mode is the MU-MIMO mode, determine the user equipment j whose PMI _v,j matches BCI _v,i and PMI _h,j matches BCI _h,i as the first pairing of the user equipment i user equipment.

According to the above user scheduling method, it also includes:

- receive an indication from the user equipment i as well as Information;

-according to each piece of information received from the user equipment i, determine the preferred dimension for the space division multiplexing of the user equipment i;

- when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as

According to the user's method above, it also includes:

- receiving from the user equipment i information indicating the preferred dimension of the user equipment i for space division multiplexing;

- receive an indication from the user equipment i Information.

According to the above user scheduling method, wherein the step of determining the MIMO mode of the user equipment i according to the information received from the user equipment i includes:

- According to the various information received from the user equipment i, and based on the preferred dimension and the Determine the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i according to the following formula:

-when determining that the second MIMO mode is a SU-MIMO mode;

-when determining that the second MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j;

Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i includes:

- if the first paired user equipment does not exist, and the second MIMO mode is MU-MIMO mode, when the preferred dimension is the vertical dimension, the user equipment that matches PMI _v,j with BCI _v,i Determining j as the second paired user equipment of the user equipment i, when the preferred dimension is the horizontal dimension, determining the user equipment j whose PMI _h,j matches the BCI _h,i as the second paired user equipment of the user equipment i Pair user devices.

According to the above user scheduling method, it also includes:

- when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as

According to the above user scheduling method, it also includes:

- receive an indication from the user equipment i Information.

According to the above user scheduling method, wherein the step of determining the MIMO mode of the user equipment i according to the information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode include:

-according to the various information received from the user equipment i, and based on the Determine the third MIMO mode of the user equipment i when performing space division multiplexing only based on the non-preferred dimension for the user equipment i according to the following formula:

-when determining that the third MIMO mode is a SU-MIMO mode;

-when determining that the third MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j;

Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i includes:

- if the first paired user equipment and the second paired user equipment do not exist, and the third MIMO mode is MU-MIMO mode, when the non-preferred dimension is the vertical dimension, match the PMI _{v, j} The user equipment j of BCI _v,i is determined as the third paired user equipment of the user equipment i, and when the non-preferred dimension is the horizontal dimension, the user equipment j whose PMI _h,j matches the BCI _h,i is determined as the user A third paired user equipment for device i.

According to the above user scheduling method, it also includes:

- receiving from the user equipment i the number R _h,i indicating the rank allocated to the user equipment i in the horizontal domain;

- receiving from the user equipment i the number _Rv,i indicating the rank allocated to the user equipment i in the vertical domain;

Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i further includes:

-Determine that the following conditions are met between the selected paired user equipment j and the user equipment i:

R _v,i + R _{v,j ≤} M, and

R _h,i +R _h,j ≤N,

Where M is the number of vertical antenna ports of the base station, and N is the number of horizontal antenna ports of the base station.

According to yet another method of the present invention, an apparatus for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system is provided, wherein the wireless communication system uses a horizontal channel and a vertical channel respectively for the 3D channel The horizontal codebook and vertical codebook, the device includes:

- for determining the precoding matrix indication PMI _{h for the horizontal channel of the user equipment, hereinafter denoted as user equipment i, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, i} , which is written as W _h,i means in the following formula;

- for determining the precoding matrix indication PMI _v,i for the user equipment i for the vertical channel based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, which is recorded in the following formula Do the device of W _v,i ;

- for determining the maximum horizontal channel for the user equipment i based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i The best partner indicates BCI _h,i , which is recorded as W _h,j in the following formula, where it is assumed that the best partner for the horizontal channel is the device of user equipment j;

- for determining the maximum vertical channel for the user equipment i based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i The best partner indicates BCI _v,i , which is recorded as W _v,j in the following formula, where it is assumed that the best partner for the vertical channel is the device of user equipment j;

- for determining the user equipment i in SU-MIMO mode based on the W _h,i and W _v,i according to the following formula installation:

Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i;

- for determining the user equipment i in MU-MIMO mode based on the W _h,i , W _v,i , W _h,j and W _v,j according to the following formula installation:

Among them, ξ(W _v,j ,W _h,j ) is the combined function of W _h,j and W _v,j , and P _MU is the signal power in MU-MIMO mode;

- used to indicate the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as The information is sent to the device of the base station.

According to still another aspect of the present invention, an apparatus for user scheduling of a 3D channel in a base station of a wireless communication system is provided, wherein the wireless communication system uses a horizontal codebook and a vertical codebook for the horizontal channel of the 3D channel respectively and vertical channels, the device includes:

- for receiving from a user equipment, hereinafter referred to as user equipment i, the PMI _h,i , PMI _v,i , and BCI _h, of the user equipment i determined according to the method for calculating and feeding back CSI according to one aspect of the present invention _i 、BCI _v,i 、 as well as installation;

- a device for determining the MIMO mode of the user equipment i according to each piece of information received from the user equipment i, wherein the MIMO mode is a SU-MIMO mode or a MU-MIMO mode;

- When the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, determine the paired user equipment of the user equipment i.

Compared with the prior art, the method for calculating and feeding back the CSI of the 3D channel in the user equipment of the wireless communication system provided by the present invention can perform calculation and feedback for the horizontal channel and the vertical channel. The method for user scheduling of the 3D channel in the base station of the communication system can determine the MIMO mode based on the CSI feedback information received from the user equipment for the horizontal channel and the vertical channel, and perform user pairing accordingly, thereby realizing the 3D channel Effective user scheduling in .

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 shows a schematic diagram based on a 3D channel;

Fig. 2 shows a flowchart of a method for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system according to an embodiment of an aspect of the present invention;

FIG. 3 shows a flowchart of a method for user scheduling of a 3D channel in a base station of a wireless communication system according to an embodiment of another aspect of the present invention;

Fig. 4 shows a schematic diagram of an apparatus for user scheduling of a 3D channel in a base station of a wireless communication system according to an embodiment of another aspect of the present invention;

Fig. 5 shows a schematic diagram of an apparatus for user scheduling of a 3D channel in a base station of a wireless communication system according to an embodiment of another aspect of the present invention.

The same or similar reference numerals in the drawings represent the same or similar components.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The wireless communication described in this article includes communication methods based on GSM and 3GPP protocols through wireless signals. Among them, the wireless communication network includes a communication network based on GSM and 3GPP protocols, generally, it includes a plurality of base stations, each base station provides wireless coverage of the cell where it is located, and a plurality of user equipment, each user equipment can be in a different cell or to move between. The base station includes but not limited to NodeB and eNodeB. One base station can be deployed in each cell, and each base station can include several sectors. Interfaces for transmitting user traffic or control traffic can be used between base stations to communicate with each other. A base station may communicate directly or indirectly with various user equipments. Each user equipment can be any electronic equipment that can directly or indirectly communicate with the base station in a wireless manner, including but not limited to: mobile phones, PDAs, and the like. In addition, as a preferred manner, each base station in the wireless communication network has multiple antennas, and each user equipment also has multiple antennas. Additionally, user equipment may be distributed at different vertical heights. Thus, the user equipment and the base station can constitute a wireless communication system based on a 3D channel. Preferably, each user equipment and base station in the wireless communication network can transmit and receive information in a time-division duplex mode (TDD mode) and a frequency-division duplex mode (FDD mode). Those skilled in the art should understand that the wireless communication technology and the mode of transmitting and receiving information between each user equipment and the base station are not limited to the above, and other existing or future wireless communication technologies and modes of transmitting and receiving information are applicable to the present invention, It should also be included in the protection scope of the present invention, and is included here by reference.

Fig. 1 shows a schematic diagram based on 3D channels. As shown in the figure, the base station 1 uses an antenna array to form beams directed to the user equipment 1 and the user equipment 2 respectively. Since user equipment 1 and user equipment 2 are located at different vertical heights, the two beams pointing to user equipment at different vertical heights need to have different downtilt angles in addition to different azimuth angles, that is, 3D Channel beamforming needs to support horizontal and vertical beamforming. For the vertical channel and the horizontal channel in the 3D channel, the wireless communication can use the vertical codebook and the horizontal codebook respectively.

Fig. 2 shows a flowchart of a method for calculating and feeding back 3D channel CSI in a user equipment of a wireless communication system according to an embodiment of an aspect of the present invention.

The method is described below by taking user equipment i as an example.

In step S21, the user equipment i determines the precoding matrix indicator PMI _h,i used by the user equipment i for the horizontal channel based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, which Denoted as W _h,i in the following formula, it is a certain codeword in the horizontal codebook. Here, the user equipment may use any known method to determine the PMI _h,i , which will not be repeated here.

In step S22, the user equipment determines the precoding matrix indicator PMI _v,i used by the user equipment i for the vertical channel based on the channel information of the 3D channel, the horizontal codebook, and the vertical codebook, which is in W v,i is recorded as W _v,i in the following formula, which is a certain codeword in the vertical codebook. Here, the user can use any known method to determine the PMI _v,i , which will not be repeated here.

In step S23, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , the user equipment i determines the The best partner indicator for the horizontal channel indicates BCI _h,i , which is recorded as W _h,j in the following formula, which is a certain codeword in the horizontal codebook, where it is assumed that the best partner for the horizontal channel is user equipment j. Here, the user equipment may use any known method to determine the BCI _h,i , which will not be repeated here.

In step S24, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , the user equipment i determines the The best partner for the vertical channel indicates BCI _v,i , which is recorded as W _v,j in the following formula, which is a certain codeword in the vertical codebook, where it is assumed that the best partner for the vertical channel is user equipment j. Here, the user equipment may use any known method to determine the BCI _v,i , which will not be repeated here.

In step S25, based on the W _h,i and W _v,i , the user equipment i determines the

Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i. Here, ξ(W _v,i ,W _h,i ) can be any available combination function on W _h,i and W _v,i .

In step S26, based on the W _h,i , W _v,i , W _h,j and W _v,j , the user equipment i determines the

Wherein, ξ(W _v,j ,W _h,j ) is the combination function of W _h,j and W _v,j mentioned above, and P _MU is the signal power in the MU-MIMO mode.

In step S27, user equipment i will indicate the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as information is sent to the base station. Here, the user equipment may send the above CSI information about the user equipment to the base station through an air interface.

In one embodiment, the user equipment i is determined based on the following formula when only based on the horizontal channel

And, the user equipment i determines, based on the following formula, when only transmitting based on the vertical channel

Here, ξ(W _v,j ,W _h,j ), P _MU , OCI, etc. are defined as above.

In one embodiment, user equipment i is based on as well as Determine the preferred dimension for space division multiplexing of the user equipment i based on the following formula, wherein the preferred dimension is a horizontal dimension or a vertical dimension: when , determine the horizontal dimension as the preferred dimension; otherwise, determine the vertical dimension as the preferred dimension. When the preferred dimension is the horizontal dimension, user equipment i will as When the preferred dimension is the vertical dimension, user equipment i will as Then user equipment i sends information indicating the preferred dimension to the base station. Here, user equipment i may, for example, use 1 bit to represent the information indicating the preferred dimension. For example, when its value is 0, it may indicate that the preferred dimension is a vertical dimension, and when its value is 1, it may indicate that the preferred dimension is a horizontal dimension. In addition, user equipment i may indicate the information is sent to the base station. Here, user equipment i can set the value to the base station, or the value with the above offset between values sent to the base station. In addition, the user equipment may also map the above offset value to, for example, a 2-bit value for representation. For example, when When it is 0db, use 00 to represent; when When it is [-1db-0db), use 01 to represent; and so on. Those skilled in the art should understand that here, the information indicating the preferred dimension and the indication The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In a preferred embodiment, when the preferred dimension is the horizontal dimension, the user equipment i will as When the preferred dimension is the vertical dimension, the user equipment will as And, user equipment i will indicate information is sent to the base station. Here, user equipment i can set the value to the base station, or the value with the above offset between values sent to the base station, and the value with the above offset between values sent to the base station. In addition, the user equipment i may also map the above-mentioned offset into a value of, for example, 2 bits to represent in the method described above, which will not be repeated here. Those skilled in the art should understand that, here, the indication The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In another embodiment, user equipment i may indicate the as well as information is sent to the base station. Here, the user equipment i does not determine the preferred dimension for space division multiplexing, but uses the CQI when transmitting based on the horizontal channel and the vertical channel respectively, that is, and The information of is sent to the base station, and the base station determines the preferred dimension of the user equipment i for space division multiplexing according to the received information. Here, user equipment i can use and The value of is sent to the base station, and it can also be compared with the above The offset between the values, i.e. and sent to the base station. As mentioned above, the user equipment may also map the offset value to, for example, a 2-bit value, which will not be repeated here. Those skilled in the art should understand that, here, the indication and The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In yet another embodiment, user equipment i may send information indicating the number R _h,i of ranks allocated to the user equipment i in the horizontal domain to the base station, and indicate the ranks R h,i allocated to the user equipment i in the vertical domain The information of the quantity R _v,i is sent to the base station.

3 shows a flowchart of a method for user scheduling of a 3D channel in a base station of a wireless communication system according to another embodiment of the present invention. The wireless communication system uses a horizontal codebook and a vertical codebook for the 3D channel respectively. The horizontal channel and vertical channel of the channel.

In the following, the base station performs user scheduling for user equipment i as an example for illustration.

In step S31, the base station receives from user equipment i the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as Specifically, the base station may receive the above information from the user equipment i through an air interface, which will not be repeated here.

In step S32, the base station determines the MIMO mode of the user equipment i according to various information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode. Next, in step S33, when the MIMO mode of the user equipment i is the MU-MIMO mode, the base station determines the paired user equipment of the user equipment i based on various information received from the user equipment i.

In an embodiment, the base station determines the first MIMO mode of the user equipment i according to the following formula according to each information received from the user equipment i:

-when determining that the first MIMO mode of the user equipment i is a SU-MIMO mode;

-when The first MIMO mode of the user equipment i is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the first predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

Here, the above-mentioned first MIMO mode is the MIMO mode of the user equipment i when spatial division multiplexing is performed based on the horizontal dimension and the vertical dimension.

And, when the above-mentioned first MIMO mode is the MU-MIMO mode, the base station determines the user equipment j whose PMI _v,j matches BCI _v,i and PMI _h,j matches BCI _h,i as the first MIMO mode of the user equipment i Pair user devices.

In one embodiment, the base station may also receive an indication from user equipment i as well as Information. Next, the base station determines the preferred dimension for space division multiplexing of the user equipment i according to various information received from the user equipment i. Specifically, when When , the base station determines that the horizontal dimension is the preferred dimension; otherwise, the base station determines that the vertical dimension is the preferred dimension. And, when the preferred dimension is the horizontal dimension, the base station will as When the preferred dimension is the vertical dimension, the base station will as In another embodiment, the base station may receive from user equipment i information indicating the preferred dimension of the user equipment i for space division multiplexing. For example, the preferred dimension information may be a 1-bit value. When the value is 0, the base station takes the horizontal dimension as the preferred dimension, and when the value is 1, the base station takes the vertical dimension as the preferred dimension. In addition, the base station may also receive an indication from the user equipment i Information. As mentioned above, the instruction information can be value, or value with offset between values offset, and this offset can be mapped to, for example, a 2bit value. Based on the received information, the base station can calculate the corresponding value. Those skilled in the art should understand that, here, the received indication and The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In a preferred embodiment, the base station is based on the preferred dimensions and the Determine the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i according to the following formula:

-when determining that the second MIMO mode is a SU-MIMO mode;

-when determining that the second MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the second predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

The above-mentioned second MIMO mode is the MIMO mode of user equipment i when space division multiplexing is performed based only on the preferred dimension.

And, when the MIMO mode of the user equipment i is the MU-MIMO mode, if the first paired user equipment does not exist, and the second MIMO mode is the MU-MIMO mode, then when the preferred dimension is vertical dimension, the base station determines the user equipment j whose PMI _v,j matches the BCI _v,i as the second paired user equipment of the user equipment i, and when the preferred dimension is the horizontal dimension, the base station determines the PMI _h,j and The user equipment j that matches the BCI _h,i is determined as the second paired user equipment of the user equipment i.

According to the method described above, when the base station cannot match the first paired user equipment for user equipment i, the base station can still find the second paired user equipment for user equipment i according to the preferred dimension, so that the user scheduling strategy of the base station more flexible.

In one embodiment, when the base station receives the indication from the user equipment i as well as After the preferred dimension is determined by the information, when the preferred dimension is a horizontal dimension, the base station will as When the preferred dimension is the vertical dimension, the base station will as In another embodiment, the base station receives from the user equipment i the information indicating the preferred dimension of the user equipment i for space division multiplexing, and in addition, the base station also receives the indication from the user equipment i Information. As mentioned above, the indication received by the base station information can be used for the value, or for the value with the above offset between values can also be used for the value with the above offset between values And, as mentioned above, the above offset can also be mapped to a value of, for example, 2 bits. Here, according to the received information, the base station can correspondingly calculate the value, which will not be repeated here.

Then, in a preferred embodiment, the base station according to the information received from the user equipment i and based on the Determine the third MIMO mode of the user equipment i when performing space division multiplexing only based on the non-preferred dimension for the user equipment i according to the following formula:

-when determining that the third MIMO mode is a SU-MIMO mode;

-when determining that the third MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the third predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

The above-mentioned third MIMO mode is the MIMO mode of user equipment i when space division multiplexing is performed only based on non-preferred dimensions.

And, if neither the first paired user equipment nor the second paired user equipment exists, and the third MIMO mode is the MU-MIMO mode, when the non-preferred dimension is the vertical dimension, the base station sets the PMI _v, The user equipment j whose _j matches BCI _v,i is determined as the third paired user equipment of the user equipment i, and when the non-preferred dimension is the horizontal dimension, the base station determines the user equipment j whose PMI _h,j matches BCI _h,i as A third paired user equipment of the user equipment i.

According to the method described above, when the base station is unable to match the first paired user equipment and the second paired user equipment for user equipment i, the base station can still find a third paired user equipment for user equipment i according to the non-preferred dimension, so that The flexibility of the user scheduling policy of the base station is further increased.

In yet another embodiment, the base station may receive from user equipment i the number Rh,i indicating the rank allocated to the user equipment i in the horizontal domain, and may receive from user equipment i the number Rh,i indicating the rank allocated to the user equipment i in the vertical domain The number of ranks Rv,i. At this time, when the MIMO mode of the user equipment i is the MU-MIMO mode, when determining the user equipment paired with the user equipment i, the base station should also determine the relationship between the selected paired user equipment j and the user equipment i meet the following conditions:

R _v,i + R _{v,j ≤} M, and

R _h,i +R _h,j ≤N,

Where M is the number of vertical antenna ports of the base station, and N is the number of horizontal antenna ports of the base station.

Fig. 4 shows a schematic diagram of an apparatus for calculating and feeding back 3D channel CSI in a user equipment of a wireless communication system according to an embodiment of another aspect of the present invention.

The apparatus is described below by taking user equipment i as an example.

The user equipment i is used to determine the precoding matrix indicator for the horizontal channel of the user equipment based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, which is referred to as user equipment i in the following PMI _h,i , which is recorded as W _h,i in the following formula. The device 41, hereinafter referred to as the horizontal channel precoding matrix indication determining device 41, is based on the channel information of the 3D channel, the horizontal codebook and the vertical The codebook is used to determine the precoding matrix indicator PMI _h, i used by the user equipment i for the horizontal channel, which is recorded as W _h,i in the following formula, which is a certain codeword in the horizontal codebook. Here, the horizontal channel precoding matrix indication determining unit 41 may use any known method to determine the PMI _h,i , which will not be repeated here.

The user equipment i is used to determine the precoding matrix indicator PMI _v,i used by the user equipment i for the vertical channel based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, which is as follows The device 42 denoted as W _v,i in the formula, hereinafter referred to as the vertical channel precoding matrix indication determining device 42, determines the user The precoding matrix used by device i for the vertical channel indicates PMI _v,i , which is denoted as W _v,i in the following formula, which is a certain codeword in the vertical codebook. Here, the vertical channel precoding matrix indication determining unit 42 may use any known method to determine the PMI _v,i , which will not be repeated here.

The user equipment _i is used to determine the _horizontal The best partner of the channel indicates BCI _h,i , which is recorded as W _h,j in the following formula, where it is assumed that the best partner for the horizontal channel is the device 43 of user equipment j, hereinafter referred to as the best partner for the horizontal channel Indicating determining means 43, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine that the user equipment i is used for the horizontal channel The best partner for indicates BCI _h,i , which is recorded as W _h,j in the following formula, which is a certain codeword in the horizontal codebook, where it is assumed that the best partner for the horizontal channel is user equipment j . Here, the horizontal channel best partner indication determining unit 43 may use any known method to determine the BCI _h,i , which will not be repeated here.

The user _{equipment i} is used to determine the vertical The best partner of the channel indicates BCI _v,i , which is recorded as W _v,j in the following formula, wherein, it is assumed that the best partner for the vertical channel is the device 44 of the user equipment j, hereinafter referred to as the best vertical channel partner Indicating determining means 44, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine that the user equipment i is used for the vertical channel The best partner indicates BCI _v,i , which is recorded as W _v,j in the following formula, which is a certain codeword in the vertical codebook, where it is assumed that the best partner for the vertical channel is user equipment j . Here, the vertical channel best partner indication determining unit 44 may use any known method to determine the BCI _v,i , which will not be repeated here.

The user equipment i is used to determine the user equipment i in the SU-MIMO mode based on the W _h,i and W _v,i . device 45, hereinafter referred to as Determining means 45, based on the W _h,i and W _v,i , determine the user equipment i in SU-MIMO mode according to the following formula:

Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i. Here, ξ(W _v,i ,W _h,i ) can be any available combination function on W _h,i and W _v,i .

The user equipment i is used to determine the user equipment i in the MU-MIMO mode based on the W _h,i , W _v,i , W _h,j and W _v,j . The device 46, hereinafter referred to as The determining means 46 determines the user equipment i in MU-MIMO mode based on the W _h,i , W _v,i , W _h,j and W _v,j according to the following formula:

Wherein, ξ(W _v,j ,W _h,j ) is the combination function of W _h,j and W _v,j mentioned above, and P _MU is the signal power in the MU-MIMO mode.

User equipment i will indicate the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as The information sent to the base station device 47, hereinafter referred to as the first sending device 47, will indicate the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as information is sent to the base station. Here, the first sending module 47 may send the above CSI information about the user equipment to the base station through an air interface.

In one embodiment, the user equipment i is used to determine when the transmission is based only on the horizontal channel device, hereinafter referred to as determining means 48 (not shown),

And, the user equipment i is used to determine when the transmission is only based on the vertical channel device, hereinafter referred to as Determining means 49 (not shown), based on the following formula

Here, ξ(W _v,j ,W _h,j ), P _MU , OCI, etc. are defined as above.

In one embodiment, the user equipment i is configured according to as well as Determine the preferred dimension of the user equipment i for space division multiplexing, wherein the preferred dimension is a device for horizontal or vertical dimensions, hereinafter referred to as the preferred dimension determination device 49 (not shown), according to as well as Determine the preferred dimension for space division multiplexing of the user equipment i based on the following formula, wherein the preferred dimension is a horizontal dimension or a vertical dimension: when , the preferred dimension determining means 49 determines the horizontal dimension as the preferred dimension; otherwise, the preferred dimension determining means 49 determines the vertical dimension as the preferred dimension. When the preferred dimension is a horizontal dimension, when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as device, hereinafter referred to as Determining means 410 (not shown), will as When the preferred dimension is the vertical dimension, determining means 410 will as Then, the means of user equipment i for sending the information indicating the preferred dimension to the base station, hereinafter referred to as the preferred dimension sending means 411 (not shown), sends the information indicating the preferred dimension to the base station. Here, the preferred dimension sending device 411 may, for example, use 1 bit to represent the information indicating the preferred dimension. For example, when its value is 0, it may indicate that the preferred dimension is a vertical dimension; when its value is 1, it may indicate that the preferred dimension is a horizontal dimension. dimension. Furthermore, the use of user equipment i will indicate the The device that sends the information to the base station, hereinafter referred to as The information sending means 412 (not shown), may indicate the information is sent to the base station. here, The information sending device 412 can send the value is sent to the base station, or the value with the above offset between values sent to the base station. also, The information sending device 412 may also map the above-mentioned offset value to, for example, a 2-bit value to represent it. For example, when When it is 0db, use 00 to represent; when When it is [-1db-0db), use 01 to represent; and so on. Those skilled in the art should understand that here, the information indicating the preferred dimension and the indication The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In a preferred embodiment, when the preferred dimension is the horizontal dimension, the user equipment i is configured to, when the preferred dimension is the horizontal dimension, as When the preferred dimension is the vertical dimension, the as device, hereinafter referred to as Determining means 413 (not shown), will as When the preferred dimension is the vertical dimension, The determining means 413 will as And, user equipment i will indicate information is sent to the base station. Here, the use of user equipment i will indicate the The device that sends the information to the base station, hereinafter referred to as Information sending means 414 (not shown), can put the value to the base station, or the value with the above offset between values sent to the base station, and the value with the above offset between values sent to the base station. also, The information sending device 414 may also map the above-mentioned offset to, for example, a 2-bit value to represent it in the method described above, which will not be repeated here. Those skilled in the art should understand that, here, the indication The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In another embodiment, user equipment i's user will indicate the as well as The device for sending the information to the base station, hereinafter referred to as the second information sending device 415 (not shown), may indicate the as well as information is sent to the base station. Here, the user equipment i does not determine the preferred dimension for space division multiplexing, but uses the CQI when transmitting based on the horizontal channel and the vertical channel respectively, that is, and The information of is sent to the base station, and the base station determines the preferred dimension of the user equipment i for space division multiplexing according to the received information. Here, the second information sending device 415 can send and The value of is sent to the base station, and it can also be compared with the above The offset between the values, i.e. and sent to the base station. As mentioned above, the second information sending device 415 may also map the offset value to, for example, a 2-bit value, which will not be repeated here. Those skilled in the art should understand that, here, the indication and The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In yet another embodiment, the user equipment i is configured to send information indicating the number of ranks R _h,i allocated to the user equipment i in the horizontal domain to the base station, hereinafter referred to as the R _h,i information sending means 416 (not shown), the information indicating the number of ranks R _h,i allocated to the user equipment i in the horizontal domain may be sent to the base station, and used to indicate the number of ranks allocated to the user equipment i in the vertical domain The device for sending the information of R _v,i to the base station, hereinafter referred to as the R _v,i information sending device 417 (not shown), sends the information indicating the number of ranks R _v,i assigned to the user equipment i in the vertical domain to the base station.

Fig. 5 shows a schematic diagram of an apparatus for user scheduling of a 3D channel in a base station of a wireless communication system according to an embodiment of another aspect of the present invention, the wireless communication system uses a horizontal codebook and a vertical codebook for the 3D channel respectively horizontal and vertical channels.

In the following, the base station performs user scheduling for user equipment i as an example for illustration.

The base station is used to receive from the user equipment, hereinafter referred to as user equipment i, the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v of the user equipment i determined according to the method described above _{, i} , as well as The means 51, hereinafter referred to as the first receiving means 51, receives from the user equipment i the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v of the user equipment i determined according to the method described above _{, i} , as well as Specifically, the first receiving module 51 may receive the above information from the user equipment i through an air interface, which will not be repeated here.

The base station is used to determine the MIMO mode of the user equipment i according to the various information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode 52, hereinafter referred to as the base station MIMO mode The determining module 52 is configured to determine the MIMO mode of the user equipment i according to various information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode. Next, when the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, the means 53 for determining the paired user equipment of the user equipment i, hereinafter referred to as the user equipment The pairing unit 53 is configured to determine a paired user equipment of the user equipment i based on various information received from the user equipment i when the MIMO mode of the user equipment i is the MU-MIMO mode.

In one embodiment, the means for determining the first MIMO mode of the user equipment i according to various information received from the user equipment i, hereinafter referred to as the first MIMO mode determining means 521 (not shown), according to From each information received by the user equipment i, determine the first MIMO mode of the user equipment i according to the following formula:

-when determining that the first MIMO mode of the user equipment i is a SU-MIMO mode;

-when The first MIMO mode of the user equipment i is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the first predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

Here, the above-mentioned first MIMO mode is the MIMO mode of the user equipment i when spatial division multiplexing is performed based on the horizontal dimension and the vertical dimension.

And, when the above-mentioned first MIMO mode is the MU-MIMO mode, the user equipment pairing means 53 determines the user equipment j whose PMI _v,j matches BCI _v,i and whose PMI _h,j matches BCI _h,i as the user equipment i's first paired user equipment.

In one embodiment, the base station is used to receive the indication from the user equipment i as well as The device for the information, hereinafter referred to as the second receiving device 54 (not shown), may also receive an indication from the user equipment i as well as Information. Next, the base station is used to determine the preferred dimension of the user equipment i for space division multiplexing according to the various information received from the user equipment i, hereinafter referred to as the base station preferred dimension determining means 55 (not shown), According to each piece of information received from the user equipment i, a preferred dimension for space division multiplexing of the user equipment i is determined. Specifically, when , the base station preferred dimension determining means 55 determines the horizontal dimension as the preferred dimension; otherwise, the base station preferred dimension determining means 55 determines the vertical dimension as the preferred dimension. And, when the preferred dimension is the horizontal dimension, the base station is used to set as When the preferred dimension is the vertical dimension, the as device, hereinafter referred to as Determining means 56 (not shown), will as When the preferred dimension is the vertical dimension, Determining means 56 will as In another embodiment, the base station's means for receiving from the user equipment i the information indicating the preferred dimension of the user equipment i for space division multiplexing, hereinafter referred to as the preferred dimension receiving means 57 (not shown) , the information indicating the preferred dimension for space division multiplexing of the user equipment i may be received from the user equipment i. For example, the information of the preferred dimension can be a 1-bit value. When the value is 0, the preferred dimension receiving means 57 takes the horizontal dimension as the preferred dimension, and when the value is 1, the preferred dimension receiving means 57 takes the vertical dimension as the preferred dimension. dimension. In addition, the base station is used for receiving the indication from the user equipment i means of information, hereinafter referred to as The receiving means 58 (not shown) may also receive an indication from the user equipment i Information. As mentioned above, the instruction information can be value, or value with offset between values offset, and this offset can be mapped to, for example, a 2bit value. According to the received information, the receiving device 58 can correspondingly calculate the value. Those skilled in the art should understand that, here, the received indication and The representation of the information is only an exemplary rather than a limiting description, and any antenna applicable to the present invention should also be included in the protection scope of the present invention, and is included here by reference.

In a preferred embodiment, the base station is configured based on the information received from the user equipment i and based on the preferred dimension and the The means for determining the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i, hereinafter referred to as the second MIMO mode determining means 522 (not shown), Based on the preferred dimensions and the Determine the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i according to the following formula:

-when determining that the second MIMO mode is a SU-MIMO mode;

-when determining that the second MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the second predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

The above-mentioned second MIMO mode is the MIMO mode of user equipment i when space division multiplexing is performed based only on the preferred dimension.

And, when the MIMO mode of the user equipment i is the MU-MIMO mode, if the first paired user equipment does not exist, and the second MIMO mode is the MU-MIMO mode, then when the preferred dimension is vertical dimension, the user equipment pairing unit 53 determines the user equipment j whose PMI _v,j matches the BCI _v,i as the second paired user equipment of the user equipment i, and when the preferred dimension is the horizontal dimension, the user equipment pairing The means 53 determines the user equipment j whose PMI _h,j matches the BCI _h,i as the second paired user equipment of the user equipment i.

According to the method described above, when the user equipment pairing means 53 cannot match the first paired user equipment for user equipment i, the user equipment pairing means 53 can still find the second paired user equipment for user equipment i according to the preferred dimension , so that the user scheduling strategy of the base station is more flexible.

In one embodiment, when the base station receives the indication from the user equipment i as well as After the preferred dimension is determined by the information, when the preferred dimension is a horizontal dimension, the base station is used to set as When the preferred dimension is the vertical dimension, the as device, hereinafter referred to as Determining means 59 (not shown), will as When the preferred dimension is the vertical dimension, Determining means 59 will as In another embodiment, the base station's means for receiving from the user equipment i the information indicating the preferred dimension of the user equipment i for space division multiplexing, hereinafter referred to as the preferred dimension receiving means 510 (not shown) , receiving from the user equipment i the information indicating the preferred dimension of the user equipment i for space division multiplexing, in addition, the base station is used to receive the indication from the user equipment i means of information, hereinafter referred to as The receiving means 511 (not shown), further receives an indication from the user equipment i Information. As mentioned above, The instruction received by the receiving means 511 information can be used for the value, or for the value with the above offset between values can also be used for the value with the above offset between values And, as mentioned above, the above offset can also be mapped to a value of, for example, 2 bits. here, According to the received information, the receiving device 511 can correspondingly calculate the value, which will not be repeated here.

Next, in a preferred embodiment, the base station uses the information received from the user equipment i and based on the The means for determining the third MIMO mode of the user equipment i when space division multiplexing is performed only based on the non-preferred dimension for the user equipment i, hereinafter referred to as the third MIMO mode determining means 523 (not shown), according to Each information received from the user equipment i, and based on the Determine the third MIMO mode of the user equipment i when performing space division multiplexing only based on the non-preferred dimension for the user equipment i according to the following formula:

-when determining that the third MIMO mode is a SU-MIMO mode;

-when determining that the third MIMO mode is an MU-MIMO mode;

Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j.

Here, the third predetermined threshold is a preset threshold based on, for example, a statistical value or an empirical value, and its value can be adjusted according to actual needs of the system.

The above-mentioned third MIMO mode is the MIMO mode of user equipment i when space division multiplexing is performed only based on non-preferred dimensions.

And, if neither the first paired user equipment nor the second paired user equipment exists, and the third MIMO mode is the MU-MIMO mode, when the non-preferred dimension is the vertical dimension, the user equipment pairing means 52 Determining the user equipment j whose PMI _v,j matches BCI _v,i as the third paired user equipment of the user equipment i, when the non-preferred dimension is the horizontal dimension, the user equipment pairing means 52 matches the PMI _h,j to the BCI _{h , the user equipment j of i} is determined as the third paired user equipment of the user equipment i.

According to the method described above, when the user equipment pairing means 52 cannot match the first paired user equipment and the second paired user equipment for user equipment i, the user equipment pairing means 52 can still match the user equipment i according to the non-preferred dimensions. Finding the third paired user equipment, thereby further increasing the flexibility of the user scheduling policy of the base station.

In yet another embodiment, the base station's means for receiving from the user equipment i indicates the number of ranks R _h,i allocated to the user equipment i in the horizontal domain, hereinafter referred to as the R _h,i receiving means 512 (not shown shown), can receive from user equipment i the number Rh,i indicating the rank allocated to the user equipment i in the horizontal domain, and the base station is used to receive the indication from the user equipment i to assign to the user in the vertical domain The apparatus for the number of ranks _Rv,i of equipment i, hereinafter referred to as _Rv,i receiving means 513 (not shown), receives from user equipment i the number of ranks Rv, i. At this time, when the MIMO mode of the user equipment i is the MU-MIMO mode, when the user equipment pairing module 52 determines the user equipment paired with the user equipment i, it should also determine that the selected paired user equipment j is compatible with the user equipment j. The following conditions are met between user equipment i:

R _v,i + R _{v,j ≤} M, and

R _h,i +R _h,j ≤N,

Where M is the number of vertical antenna ports of the base station, and N is the number of horizontal antenna ports of the base station.

It should be noted that the present invention can be implemented in software and/or a combination of software and hardware, for example, it can be implemented by an application specific integrated circuit (ASIC), a general purpose computer or any other similar hardware devices. In one embodiment, the software program of the present invention can be executed by a processor to realize the steps or functions described above. Likewise, the software program (including associated data structures) of the present invention can be stored in a computer-readable recording medium such as RAM memory, magnetic or optical drive or floppy disk and the like. In addition, some steps or functions of the present invention may be implemented by hardware, for example, as a circuit that cooperates with a processor to execute each step or function.

In addition, a part of the present invention can be applied as a computer program product, such as a computer program instruction. When it is executed by a computer, the method and/or technical solution according to the present invention can be invoked or provided through the operation of the computer. The program instructions for invoking the method of the present invention may be stored in a fixed or removable recording medium, and/or transmitted through broadcasting or data streams in other signal-carrying media, and/or stored in the in the working memory of the computer device on which the program instructions described above are executed. Here, an embodiment according to the present invention comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, a trigger The operation of the device is based on the foregoing methods and/or technical solutions according to multiple embodiments of the present invention.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of means stated in the device claims can also be realized by one device by software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order.

Claims (30)

1. A method for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system, wherein the wireless communication system uses horizontal codebooks and vertical codes for horizontal channels and vertical channels respectively for 3D channels This method includes: - based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, determine the precoding matrix indicator PMI _h,i for the horizontal channel of the user equipment, hereinafter denoted as user equipment i, It is denoted as W _h,i in the following formulae; - Based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, determine the precoding matrix indicator PMI _v, i used by the user equipment i for the vertical channel, which is denoted as W in the following formula _v,i ; - based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine the best partner for the user equipment i for the horizontal channel Indicate BCI _h,i , which is denoted as W _h,j in the following formula, where it is assumed that the best partner for the horizontal channel is user equipment j; - based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i , determine the best partner for the user equipment i for the vertical channel Indicate BCI _v,i , which is denoted as W _v,j in the following formula, where it is assumed that the best partner for the vertical channel is user equipment j; - Based on the W _h,i and W _v,i , determine the user equipment i in SU-MIMO mode according to the following formula Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i; - Based on the W _h,i , W _v,i , W _h,j and W _v,j , determine the user equipment i in MU-MIMO mode according to the following formula Among them, ξ(W _v,j ,W _h,j ) is the combined function of W _h,j and W _v,j , and P _MU is the signal power in MU-MIMO mode; - will indicate said PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as information is sent to the base station. 2. The method of claim 1, further comprising: - Determine based on the following formula when only the horizontal channel is used for transmission - Determine based on the following formula when only the vertical channel is used for transmission 3. The method of claim 2, further comprising: -according to as well as Determine the preferred dimension for performing space division multiplexing of the user equipment i based on the following formula, wherein the preferred dimension is a horizontal dimension or a vertical dimension: when , determine the horizontal dimension as the preferred dimension, otherwise, determine the vertical dimension as the preferred dimension; - when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as - sending information indicating said preferred dimensions to a base station; - will instruct as described information is sent to the base station. 4. The method of claim 2, further comprising: - will instruct as described as well as information is sent to the base station. 5. The method according to claim 2 or 3, further comprising: - when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as - will instruct as described information is sent to the base station. 6. The method according to any one of claims 1 to 5, further comprising: - sending to the base station information indicating the number R _h,i of ranks allocated to the user equipment i in the horizontal domain; - Sending information indicating the number _Rv,i of ranks allocated to the user equipment i in the vertical domain to the base station. 7. A method for user scheduling of a 3D channel in a base station of a wireless communication system, wherein the wireless communication system uses a horizontal codebook and a vertical codebook for the horizontal channel and the vertical channel of the 3D channel respectively, the Methods include: - receiving from a user equipment, hereinafter denoted user equipment i, the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i 、 as well as - Determine the MIMO mode of the user equipment i according to each piece of information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode; - When the MIMO mode of the user equipment i is the MU-MIMO mode, determining a paired user equipment of the user equipment i based on various information received from the user equipment i. 8. The method according to claim 7, wherein the step of determining the MIMO mode of the user equipment i according to the information received from the user equipment i comprises: - According to each information received from the user equipment i, determine the first MIMO mode of the user equipment i according to the following formula: -when determining that the first MIMO mode of the user equipment i is a SU-MIMO mode; -when The user equipment The first MIMO mode of i is the MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, the step of determining the paired user equipment of the user equipment i includes: - When the first MIMO mode is the MU-MIMO mode, determine the user equipment j whose PMI _v,j matches BCI _v,i and PMI _h,j matches BCI _h,i as the first pairing of the user equipment i user equipment. 9. The method according to claim 7 or 8, further comprising: - receive an indication from the user equipment i as well as Information; -according to each piece of information received from the user equipment i, determine the preferred dimension for the space division multiplexing of the user equipment i; - when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as 10. The method according to claim 7 or 8, further comprising: - receiving from the user equipment i information indicating the preferred dimension of the user equipment i for space division multiplexing; - receive an indication from the user equipment i Information. 11. The method according to claim 9 or 10, wherein the step of determining the MIMO mode of the user equipment i according to each information received from the user equipment i comprises: - According to the various information received from the user equipment i, and based on the preferred dimension and the Determine the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i according to the following formula: -when determining that the second MIMO mode is a SU-MIMO mode; -when determining that the second MIMO mode is an MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i includes: - if the first paired user equipment does not exist, and the second MIMO mode is MU-MIMO mode, when the preferred dimension is the vertical dimension, the user equipment that matches PMI _v,j with BCI _v,i Determining j as the second paired user equipment of the user equipment i, when the preferred dimension is the horizontal dimension, determining the user equipment j whose PMI _h,j matches the BCI _h,i as the second paired user equipment of the user equipment i Pair user devices. 12. The method of claim 9, further comprising: - when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as 13. The method of claim 10, further comprising: - receive an indication from the user equipment i Information. 14. The method according to claim 12 or 13, wherein, according to the information received from the user equipment i, the MIMO mode of the user equipment i is determined, wherein the MIMO mode is SU-MIMO mode or The steps of MU-MIMO mode include: -according to the various information received from the user equipment i, and based on the Determine the third MIMO mode of the user equipment i when performing space division multiplexing only based on the non-preferred dimension for the user equipment i according to the following formula: -when determining that the third MIMO mode is a SU-MIMO mode; -when determining that the third MIMO mode is an MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i includes: - if the first paired user equipment and the second paired user equipment do not exist, and the third MIMO mode is MU-MIMO mode, when the non-preferred dimension is the vertical dimension, match the PMI _{v, j} The user equipment j of BCI _v,i is determined as the third paired user equipment of the user equipment i, and when the non-preferred dimension is the horizontal dimension, the user equipment j whose PMI _h,j matches the BCI _h,i is determined as the user A third paired user equipment for device i. 15. The method according to any one of claims 7 to 14, further comprising: - receiving from the user equipment i the number R _h,i indicating the rank allocated to the user equipment i in the horizontal domain; - receiving from the user equipment i the number _Rv,i indicating the rank allocated to the user equipment i in the vertical domain; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the step of determining the user equipment paired with the user equipment i further includes: -Determine that the following conditions are met between the selected paired user equipment j and the user equipment i: R _v,i + R _{v,j ≤} M, and R _h,i +R _h,j ≤N, Where M is the number of vertical antenna ports of the base station, and N is the number of horizontal antenna ports of the base station. 16. An apparatus for calculating and feeding back CSI of a 3D channel in a user equipment of a wireless communication system, wherein the wireless communication system uses horizontal codebooks and vertical codes for horizontal channels and vertical channels respectively for 3D channels This device includes: - for determining the precoding matrix indication PMI _{h for the horizontal channel of the user equipment, hereinafter denoted as user equipment i, based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, i} , which is written as W _h,i means in the following formula; - for determining the precoding matrix indication PMI _v,i for the user equipment i for the vertical channel based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, which is recorded in the following formula Do the device of W _v,i ; - for determining the maximum horizontal channel for the user equipment i based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i The best partner indicates BCI _h,i , which is recorded as W _h,j in the following formula, where it is assumed that the best partner for the horizontal channel is the device of user equipment j; - for determining the maximum vertical channel for the user equipment i based on the channel information of the 3D channel, the horizontal codebook and the vertical codebook, and based on the PMI _h,i and PMI _v,i The best partner indicates BCI _v,i , which is recorded as W _v,j in the following formula, where it is assumed that the best partner for the vertical channel is the device of user equipment j; - for determining the user equipment i in SU-MIMO mode based on the W _h,i and W _v,i according to the following formula installation: Among them, ξ(W _v,i ,W _h,i ) is the combination function of W _h,i and W _v,i , OCI is the interference of other cells, P _SU is the signal power in SU-MIMO mode, and H _i is The channel matrix of user equipment i; - for determining the user equipment i in MU-MIMO mode based on the W _h,i , W _v,i , W _h,j and W _v,j according to the following formula installation: Among them, ξ(W _v,j ,W _h,j ) is the combined function of W _h,j and W _v,j , and P _MU is the signal power in MU-MIMO mode; - used to indicate the PMI _h,i , PMI _v,i , BCI _h,i , BCI _v,i , as well as The information is sent to the device of the base station. 17. The apparatus of claim 16, further comprising: - used to determine based on the following formula when only the horizontal channel is used for transmission installation: - used to determine based on the following formula when only the vertical channel is used for transmission installation: 18. The apparatus of claim 17, further comprising: - used according to as well as Determine the preferred dimension for performing space division multiplexing of the user equipment i based on the following formula, wherein the preferred dimension is a device for horizontal or vertical dimensions: when , determine the horizontal dimension as the preferred dimension, otherwise, determine the vertical dimension as the preferred dimension; - used when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as installation; - means for sending information indicative of said preferred dimension to a base station; - used to place the instructions as described The information is sent to the device of the base station. 19. The apparatus of claim 18, further comprising: - used to place the instructions as described as well as The information is sent to the device of the base station. 20. The apparatus according to claim 17 or 18, further comprising: - used when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as installation; - used to place the instructions as described The information is sent to the device of the base station. 21. The apparatus according to any one of claims 16 to 20, further comprising: - means for sending to the base station information indicating the number R _h,i of ranks allocated to the user equipment i in the horizontal domain; - Means for sending to the base station information indicating the number _Rv,i of ranks allocated to the user equipment i in the vertical domain. 22. An apparatus for user scheduling of a 3D channel in a base station of a wireless communication system, wherein the wireless communication system uses a horizontal codebook and a vertical codebook for the horizontal channel and the vertical channel of the 3D channel respectively, the Devices include: - for receiving from a user equipment, hereinafter denoted user equipment i, the PMI _h,i , PMI _v,i , BCI _h, of the user equipment i determined according to the method according to any one of claims 1 to 5 _i 、BCI _v,i 、 as well as installation; - a device for determining the MIMO mode of the user equipment i according to each piece of information received from the user equipment i, wherein the MIMO mode is a SU-MIMO mode or a MU-MIMO mode; - When the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, determine the paired user equipment of the user equipment i. 23. The apparatus according to claim 22, wherein the means for determining the MIMO mode of the user equipment i according to each information received from the user equipment i comprises: - means for determining the first MIMO mode of said user equipment i according to the following formula according to the respective information received from the user equipment i: -when determining that the first MIMO mode of the user equipment i is a SU-MIMO mode; -when The first MIMO mode of the user equipment i is an MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, based on various information received from the user equipment i, the means for determining the paired user equipment of the user equipment i is used for: - When the first MIMO mode is the MU-MIMO mode, determine the user equipment j whose PMI _v,j matches BCI _v,i and PMI _h,j matches BCI _h,i as the first pairing of the user equipment i user equipment. 24. The apparatus according to claim 22 or 23, further comprising: -for receiving an indication from the user equipment i as well as information device; - means for determining the preferred dimension of the user equipment i for space division multiplexing according to the respective information received from the user equipment i; - used when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as installation. 25. The apparatus according to claim 22 or 23, further comprising: - means for receiving from the user equipment i information indicating a preferred dimension of the user equipment i for space division multiplexing; -for receiving an indication from the user equipment i information device. 26. The apparatus according to claim 24 or 25, wherein the means for determining the MIMO mode of the user equipment i according to each information received from the user equipment i comprises: - for according to the information received from the user equipment i, and based on the preferred dimension and the A device for determining the second MIMO mode of the user equipment i when space division multiplexing is performed only based on the preferred dimension for the user equipment i according to the following formula: -when determining that the second MIMO mode is a SU-MIMO mode; -when determining that the second MIMO mode is an MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the means for determining the user equipment paired with the user equipment i is used for: - if said first paired user equipment does not exist and said second MIMO mode is MU-MIMO mode, then match its PMI _v,j with BCI _v,i when said preferred dimension is the vertical dimension Determining the device j as the second paired user equipment of the user equipment i, when the preferred dimension is the horizontal dimension, determining the user equipment j whose PMI _h,j matches the BCI _h,i as the user equipment j of the user equipment i A second paired user equipment. 27. The apparatus of claim 24, further comprising: - used when the preferred dimension is a horizontal dimension, the as When the preferred dimension is the vertical dimension, the as installation. 28. The apparatus of claim 27, further comprising: -for receiving an indication from the user equipment i information device. 29. The apparatus according to claim 25 or 26, wherein the device is configured to determine the MIMO mode of the user equipment i according to various information received from the user equipment i, wherein the MIMO mode is SU-MIMO mode or MU-MIMO mode devices include: - for according to the information received from the user equipment i, and based on the A device for determining the third MIMO mode of the user equipment i when performing space division multiplexing only based on non-preferred dimensions for the user equipment i according to the following formula: -when determining that the third MIMO mode is a SU-MIMO mode; -when determining that the third MIMO mode is an MU-MIMO mode; Where Cap(CQI) is a mapping function from CQI to capacity, is the total capacity of user equipment i and its best partner user equipment j; Wherein, when the MIMO mode of the user equipment i is the MU-MIMO mode, the means for determining the user equipment paired with the user equipment i is used for: - if the first paired user equipment and the second paired user equipment do not exist, and the third MIMO mode is MU-MIMO mode, when the non-preferred dimension is the vertical dimension, match the PMI _{v, j} The user equipment j of BCI _v,i is determined as the third paired user equipment of the user equipment i, and when the non-preferred dimension is the horizontal dimension, the user equipment j whose PMI _h,j matches the BCI _h,i is determined as the user A third paired user equipment for device i. 30. The apparatus according to any one of claims 22 to 29, further comprising: - means for receiving from the user equipment i the number R _h,i indicating the rank allocated to the user equipment i in the horizontal domain; - means for receiving from the user equipment i the number _Rv,i indicating the rank allocated to the user equipment i in the vertical domain; Wherein, the means for determining the user equipment paired with the user equipment i when the MIMO mode of the user equipment i is the MU-MIMO mode is further used for: -Determine that the following conditions are met between the selected paired user equipment j and the user equipment i: R _v,i + R _{v,j ≤} M, and R _h,i +R _h,j ≤N, Where M is the number of vertical antenna ports of the base station, and N is the number of horizontal antenna ports of the base station.