CN105024780A - Information transmitting and confirmation and channel reconstruction method and related device and system - Google Patents

Abstract

The invention discloses an information transmitting and confirmation and channel reconstruction method and a related device and system. Weight mapping is performed on a 3D MIMO antenna by a base station according to the set vertical and horizontal dimension weight vectors so as to obtain vertical and horizontal dimension equivalent channels, and CSI-RS and the vertical dimension weight vector related to the vertical and horizontal dimension equivalent channels and CQI indication information used for indicating a CQI calculation method required by a terminal are transmitted to the terminal so that the terminal is enabled to obtain the corresponding CQI through calculation according to the received CSI-RS, the weight vector and the CQI indication information, and the base station is enabled to realize corresponding channel reconstruction according to the CQI fed back by the terminal. Therefore, objectives of enhancing CSI-RS emission power, enhancing CQI calculation accuracy and improving system performance are achieved on the basis of providing the information transmitting method and the CQI calculation method suitable for a 3D MIMO system.

Description

A kind of information sends, determine and channel reconstruction method and relevant apparatus and system

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of method for sending information based on 3D-MIMO (3Dimension-Multiple Input Multiple Output, three-dimensional multiple-input and multiple-output) technology, defining method and channel reconstruction method and relevant apparatus and system.

Background technology

At present, LTE (Long Term Evolution, Long Term Evolution) and WiMax (World WideInteroperability for Microwave Access, worldwide interoperability for microwave access) etc. existing communication system adopt be all traditional 2D-MIMO technology, can according to UE (User Equipment, subscriber equipment) in horizontal plane dimensions, form from the different of the angle of base station the narrow beam following the tracks of user, to suppress the interference from other users while providing service for user, and then reach and improve transmission quality, improve the object of power system capacity.

Particularly, as shown in Figure 1, when adopting 2D-MIMO technology to form the narrow beam following the tracks of user, because UE1, UE2 and UE4 are different from the angle of base station in horizontal plane dimensions, therefore, base station can horizontal plane dimensions formed 3 aim at respectively UE1, UE2 and UE4 travel direction send and non-interfering narrow beam provides corresponding service for it.But, for UE2 and UE3, because it is identical with the angle of base station in horizontal dimensions, therefore, if still adopt 2D-MIMO technology to form the narrow beam following the tracks of UE2 and UE3, then because the direction of base station to the narrow beam that described UE2 with UE3 sends is identical, thus the narrow beam that base station can be made to send for described UE2 and UE3 can disturb mutually, and then can cause the reduction of UE2 and UE3 service quality.

In order to solve the problem, the vertical space degree of freedom is fully excavated in direction more feasible at present, by traditional 2D MIMO technological expansion to 3D MIMO technology, to make full use of 3 dimensions in space to improve systematic function.Particularly, at present, 3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie standardization body) enters on the channel model and Simulation Evaluation hypothesis etc. of 3D-MIMO technology in LTE-Advanced Rel-12 standardization.Wherein, in order to realize the degree of freedom of 3D-MIMO vertical direction, need improve existing 2D-MIMO system antenna, as shown in Figure 2, in 3D-MIMO system, S × the N that original N antenna can be expanded to matrix form ties up antenna, wherein, described S, N are positive integer, described S represents the antenna oscillator number of vertical dimensions, described N represents the antenna oscillator number of horizontal dimensions, a certain polarised direction, and namely through improving, every root horizontal antenna originally can be made up of the antenna oscillator of S (as 8 ~ 10) vertical direction.

Correspondingly, as shown in Figure 3, in 3D-MIMO system, can according to UE2, UE3 in vertical direction with the difference of the angle of base station, the directional antenna beam of base station for UE2 and UE3 is once distinguished in the vertical dimension. again, to form at three dimensions the narrow beam of accurately aiming at UE2 and UE3 respectively and to provide corresponding service for it, thus while improving QoS of customer, reach the object improving system spectral efficiency.

But, due to CSI-RS (channel state information reference signal conventional at present, channel state information reference signals) send mode, CQI (Channel Quality Indicator, channel quality indicates) account form and channel reconstruction mode be all for 2D-MIMO system, cannot be directly applied in 3D-MIMO system, therefore, cause the impact of performance of current 3D-MIMO system not good, therefore, need the CSI-RS send mode that a kind of 3D-MIMO system that is applicable to newly is provided badly, CQI account form and channel reconstruction mode solve the problems referred to above.

Summary of the invention

Embodiments provide a kind of information to send, determine and channel reconstruction method and relevant apparatus and system, in order to solve exist at present cannot be not good by the impact of performance directly applying to the 3D-MIMO system that 3D-MIMO system causes based on the CSI-RS send mode of 2D-MIMO system and CQI account form etc. problem.

Embodiments provide a kind of method for sending information, comprising:

Base station is weighted mapping to 3DMIMO antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively; And

The CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt are sent to terminal, calculates corresponding CQI to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Further, the embodiment of the present invention additionally provides a kind of information defining method, comprising:

Terminal receive that base station sends, with described base station according to the vertical dimensions weighing vector set to 3DMIMO antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and described base station according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector are weighted to 3D mimo antenna and are used to indicate the CQI indication information of the CQI account form that terminal need adopt; And

Corresponding CQI is calculated according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Further, the embodiment of the present invention additionally provides a kind of channel reconstruction method, comprising:

The CQI of base station receiving terminal feedback; And

3D mimo channel is reconstructed based on the described CQI received;

Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and described base station according to the horizontal dimensions weighing vector set to 3D mimo antenna be weighted the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighting to and the CQI indication information that is used to indicate the CQI account form that terminal need adopt calculate.

Further, the embodiment of the present invention additionally provides a kind of base station, comprising:

Weighting map unit, for being weighted mapping to 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively;

Information transmitting unit, for the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt are sent to terminal, calculate corresponding CQI to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Further, the embodiment of the present invention additionally provides a kind of terminal, comprising:

Information receiving unit, for receive that base station sends, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and described base station according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector are weighted to 3D mimo antenna and are used to indicate the CQI indication information of the CQI account form that terminal need adopt;

Information determination unit, for calculating corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive.

Further, the embodiment of the present invention additionally provides a kind of base station, comprising:

Information receiving unit, for the CQI of receiving terminal feedback;

Channel reconstruction unit, reconstructs 3DMIMO channel for the described CQI received based on described information receiving unit;

Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and the described base station CQI indication information that according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector is weighted to 3D mimo antenna and is used to indicate the CQI account form that terminal need adopt calculate.

Further, the embodiment of the present invention additionally provides a kind of information determining system, and described system comprises base station and terminal, wherein:

Described base station, for being weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt are sent to described terminal;

Described terminal, for receiving the CSI-RS relevant to described horizontal dimensions equivalent channel that described base station sends, CSI-RS, described vertical dimensions weighing vector and the described CQI indication information relevant with described vertical dimensions equivalent channel, and calculate corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Further, the embodiment of the present invention additionally provides a kind of channel reconstruction system, and described system comprises base station and terminal, wherein:

Described base station, for receiving the CQI of described terminal feedback, and reconstructs 3D mimo channel based on the described CQI received;

Described terminal, for the corresponding CQI of described base station feedback; Wherein, described CQI is that described terminal sent, and be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains to described base station according to the vertical dimensions weighing vector set to 3D mimo antenna, be weighted the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector with described base station according to the horizontal dimensions weighing vector set to 3D mimo antenna and be used to indicate the CQI account form that terminal need adopt CQI indication information according to described base station calculates.

Beneficial effect of the present invention is as follows:

Embodiments provide a kind of information to send, determine and channel reconstruction method and relevant apparatus and system, base station is weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3DMIMO antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and overlap CSI-RS by relevant to described horizontal dimensions equivalent channel and vertical dimensions equivalent channel two, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt send to terminal, to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information calculate corresponding CQI, and and then make described base station can according to the described CQI of described terminal feedback, realize the reconstruct of corresponding 3D-MIMO channel, thus can at the CSI-RS send mode providing a kind of 3D-MIMO system that is applicable to newly, on the basis of CQI computational methods and channel reconstruction method etc., reach and improve CSI-RS transmitting power, reduce CSI-RS and take expense, improve the calculating accuracy of CQI and improve the object of systematic function.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Figure 1 shows that the narrow beam schematic diagram under 2D-MIMO system;

Figure 2 shows that the antenna structure view of 3D-MIMO system;

Figure 3 shows that the narrow beam schematic diagram under 3D-MIMO system;

Figure 4 shows that the schematic flow sheet of method for sending information described in the embodiment of the present invention one;

Figure 5 shows that the schematic flow sheet of information defining method described in the embodiment of the present invention two;

Figure 6 shows that the schematic flow sheet of channel reconstruction method described in the embodiment of the present invention three;

Figure 7 shows that the structural representation of base station described in the embodiment of the present invention four;

Figure 8 shows that the structural representation of terminal described in the embodiment of the present invention five;

Figure 9 shows that the structural representation of base station described in the embodiment of the present invention six;

Figure 10 shows that the structural representation of information determining system described in the embodiment of the present invention seven;

Figure 11 shows that the structural representation of channel reconstruction system described in the embodiment of the present invention eight.

Embodiment

Embodiments provide a kind of information to send, determine and channel reconstruction method and relevant apparatus and system, base station is weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3DMIMO antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and by the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant to described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt send to terminal, to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information calculate corresponding CQI, and and then make described base station can according to the described CQI of described terminal feedback, realize the reconstruct of corresponding 3D-MIMO channel, thus can at the CSI-RS send mode providing a kind of 3D-MIMO system that is applicable to newly, on the basis of CQI computational methods and channel reconstruction method etc., reach and improve CSI-RS transmitting power, reduce CSI-RS and take expense, improve the calculating accuracy of CQI and improve the object of systematic function.

In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment one:

The embodiment of the present invention one provides a kind of method for sending information being applicable to 3D-MIMO system, and as shown in Figure 4, it is the schematic flow sheet of method for sending information described in the embodiment of the present invention one, and described method for sending information can comprise the following steps:

Step 101: base station is weighted mapping to 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively.

Particularly, in embodiment of the present invention, for convenience, be equipped with single antenna with terminal, it is that example is described that base station is equipped with the 3D uniform surface battle array multiple antennas shown in Fig. 2.It should be noted that, in systems in practice, in order to reduce the physical area shared by antenna, usually adopting dual polarized antenna, now, the antenna oscillator number of base station can be expressed as Sx2N; Wherein, described S, N are positive integer, and described S represents the antenna oscillator number of vertical dimensions, and described N represents the antenna oscillator number of horizontal dimensions, a certain polarised direction.

Further, in embodiment of the present invention, in order to improve the transmitting power of vertical dimensions antenna and horizontal dimensions antenna CSI-RS, and ensure that the terminal in cell range can both receive corresponding CSI-RS, base station needed to be weighted mapping to 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively before sending CSI-RS.

Particularly, in embodiment of the present invention, base station can be the vertical dimensions weighing vector w of 1xS respectively by dimension _vand dimension is the horizontal dimensions weighing vector w of 1xN _hmapping is weighted to 3D mimo antenna, to obtain equivalent level antenna port array that dimension is 1x2N and the equivalent vertical antenna array of ports that dimension is 1xS dimension respectively, and and then obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel respectively, the embodiment of the present invention is not limited in any way this.

Further, according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector, mapping is being weighted to 3D mimo antenna respectively, after obtaining corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, the operation of the corresponding CSI-RS of transmission described in step 102 etc. can be performed.

Step 102: the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt are sent to terminal by base station, calculate corresponding CQI to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Particularly, in embodiment of the present invention, the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant with described vertical dimensions equivalent channel respectively by being weighted described horizontal dimensions equivalent channel that mapping obtains and vertical dimensions equivalent channel (or equivalent level antenna port array and equivalent vertical antenna array of ports) to 3D mimo antenna, can be sent to terminal by base station; Further,

When carrying out the transmission of CSI-RS, in order to reduce the mutual interference between signal, usually mutually orthogonal mode can be adopted to send the described CSI-RS relevant to described horizontal dimensions equivalent channel and the CSI-RS relevant with described vertical dimensions equivalent channel, and the embodiment of the present invention is not limited in any way this.

Further, in embodiment of the present invention, base station except sending two cover CSI-RS to terminal in horizontal dimensions equivalent channel and vertical dimensions equivalent channel, to reach the transmitting power improving CSI-RS, outside the effect taking expense of reduction CSI-RS, also the vertical dimensions weighing vector adopted when being weighted mapping to 3D-MIMO antenna and the CQI indication information being used to indicate the CQI account form that terminal need adopt can be sent to terminal, to make terminal according to the CSI-RS received, vertical dimensions weighing vector and described CQI indication information calculate corresponding CQI, thus the effect of the calculating accuracy improving CQI can be reached.

It should be noted that, in embodiment of the present invention, base station can adopt existing signaling or new definition signaling to send corresponding vertical dimensions weighing vector and CQI indication information to described terminal, and the embodiment of the present invention is not limited in any way this.

Further, in embodiment of the present invention, the value matched with corresponding CQI account form can be carried in described CQI indication information, as the first set point of matching with single CQI account form, (this first set point can set according to actual conditions, as 1 etc. can be set to) or the second set point of matching with two CQI account form (this second set point also can set according to actual conditions, as 0 etc. can be set to) etc., to make described terminal according to the value of carrying in the described CQI indication information received, determine the CQI account form matched with entrained value.

Particularly, in embodiment of the present invention, the setting of the value of CQI indication information can be carried out in such a way: when described CQI account form is single CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is two CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

That is, when the value of described CQI indication information is 1, can think that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form; When the value of described CQI indication information be 0 or for corresponding default value etc. time, then can think that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form.

Certainly it should be noted that, in embodiment of the present invention, also can carry out the setting of the value of CQI indication information according to other modes.Such as, when described CQI account form is two CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is single CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

Further, in embodiment of the present invention, if described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form, then to make described terminal calculate corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, can comprise:

To make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

If described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form, then to make described terminal calculate corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, can comprise:

To make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI (Precoding Matrix Indicator, pre-coding matrix indicates) of obtained horizontal dimensions and the PMI of vertical dimensions.

Embodiments provide a kind of method for sending information, base station can be weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and by the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant to described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt send to terminal, to make described terminal according to the CSI-RS received, vertical dimensions weighing vector and CQI indication information calculate corresponding CQI, thus can on the basis of CSI-RS send mode and CQI computational methods etc. providing a kind of 3D-MIMO system that is applicable to newly, reach and improve CSI-RS transmitting power, reduce the object that CSI-RS takies the calculating accuracy of expense and raising CQI.

Embodiment two:

The embodiment of the present invention two provides a kind of information defining method being applicable to 3D-MIMO system, and as shown in Figure 5, it can comprise the following steps for the schematic flow sheet of information defining method described in the embodiment of the present invention two, described information defining method:

Step 201: terminal receive that base station sends, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and described base station according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector are weighted to 3D mimo antenna and are used to indicate the CQI indication information of the CQI account form that terminal need adopt.

Particularly, in embodiment of the present invention, terminal can adopt existing signaling or new definition signaling to receive corresponding vertical dimensions weighing vector and the CQI indication information of the transmission of described base station, and the embodiment of the present invention is not limited in any way this.

Wherein, the value matched with corresponding CQI account form can be carried in described CQI indication information, as the first set point of matching with single CQI account form, (this first set point can set according to actual conditions, as 1 etc. can be set to) or the second set point of matching with two CQI account form (this second set point also can set according to actual conditions, as 0 etc. can be set to) etc., to make described terminal according to the value of carrying in the described CQI indication information received, determine the CQI account form matched with entrained value.

Particularly, the setting of the value of described CQI indication information is identical with the set-up mode of the value of the CQI indication information described in the embodiment of the present invention one.Such as, when described CQI account form is single CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is two CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (e.g., any numerical value can not be set, maintenance space state).

That is, when according to the described CQI indication information that receives, when the value determining described CQI indication information is 1, can think that the CQI account form indicated by described base station is single CQI account form; When according to the described CQI indication information that receives, determine the value of described CQI indication information be 0 or for corresponding default value etc. time, then can think that the CQI account form indicated by described base station is two CQI account forms.

Certainly it should be noted that, in embodiment of the present invention, also can carry out the setting of the value of CQI indication information according to other modes.Such as, when described CQI account form is two CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is single CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

Step 202: terminal calculates corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Particularly, in embodiment of the present invention, terminal calculates corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, can comprise:

If according to the described CQI indication information received, determine that the CQI account form that need adopt is single CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and in conjunction with described vertical dimensions weighing vector w _vcorresponding CQI (i.e. single CQI) is obtained according to following formulae discovery:

Or, if according to the described CQI indication information received, determine that the CQI account form that need adopt is two CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and in conjunction with described vertical dimensions weighing vector w _vthe CQI of corresponding horizontal dimensions is calculated respectively according to following formula ^leveland the CQI of vertical dimensions ^vertically(i.e. two CQI):

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described vec{} represents and is carried out superposing to form larger column vector by each row of matrix; Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

Particularly, in embodiment of the present invention, the channel of all vertical polarized antenna oscillators of base station and horizontally-polarized antenna oscillator and terminal room can be expressed as wherein, described in all vertical polarized antenna oscillators of described base station and the channel matrix of terminal room, described in all horizontally-polarized antenna oscillators of described base station and the channel matrix of terminal room.For convenience, consider that channel is straight length channel, then all vertical polarized antenna oscillators of described base station and the channel matrix of terminal room and all horizontally-polarized antenna oscillators of described base station and the channel matrix of terminal room can be expressed as: $H_{S\×N}^{\mathrm{Ver}}=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Ver}}\right\}{h}_V^T{h}_H,$ $H_{S\×N}^{\mathrm{Hor}}=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Hor}}\right\}{h}_V^T{h}_H,$ Wherein, described h ₀for the amplitude gain of described base station and terminal room channel, wherein contain the path loss of the transmitting power of base station and base station and terminal room channel, shadow fading and the gain of multipath fading channel magnitude etc.

Correspondingly, all poliarizing antenna oscillators of described base station and the channel matrix of terminal room i.e. all channel matrixes of user can be expressed as:

$H_{S\×2N}^{\mathrm{All}}=\left[\begin{array}{cc}{H}_{S\×N}^{\mathrm{Hor}}& H_{S\×N}^{\mathrm{Ver}}\end{array}\right]=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Hor}}\right\}\left[\begin{array}{cc}{h}_V^T{h}_H& \exp \left\{j({\mathrm{\ω}}_0^{\mathrm{Ver}}-{\mathrm{\ω}}_0^{\mathrm{Hor}})\right\}{h}_V^T{h}_H\end{array}\right];$

Wherein, $h_V=\left[\begin{array}{cccc}1& \exp \left\{j2\mathrm{\π}{\mathrm{\Δ}}_V\right\}& \·\·\·& \exp \left\{j2\mathrm{\π}{\mathrm{\Δ}}_V(S-1)\right\}\end{array}\right];$

$h_H=\left[\begin{array}{cccc}1& \exp \left\{j2\mathrm{\π}{\mathrm{\Δ}}_H\right\}& \·\·\·& \exp \left\{j2\mathrm{\π}{\mathrm{\Δ}}_H(N-1)\right\}\end{array}\right];$

Described Δ _vfor phase difference value when vertical dimensions two antenna oscillators receive identical signal; Described Δ _hthe phase difference values of horizontal dimensions two antenna oscillators when receiving identical signal.

Correspondingly, if the signal to noise ratio that hypothesis down channel is estimated is higher, then correspondingly, the horizontal dimensions equivalent channel obtained is estimated according to the CSI-RS received can be expressed as:

$\begin{array}{c}{\stackrel{\‾}{h}}_{1\×2N}^{\mathrm{All}}=w_V{H}_{S\×2N}^{\mathrm{All}}=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Hor}}\right\}{w}_V\left[\begin{array}{cc}{h}_V^T{h}_H& \exp \left\{j({\mathrm{\ω}}_0^{\mathrm{Ver}}-{\mathrm{\ω}}_0^{\mathrm{Hor}})\right\}{h}_V^T{h}_H\end{array}\right]\\ =h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Hor}}\right\}{a}_V\left[\begin{array}{cc}{h}_H& \exp \left\{j({\mathrm{\ω}}_0^{\mathrm{Ver}}-{\mathrm{\ω}}_0^{\mathrm{Hor}})\right\}{h}_H\end{array}\right]\end{array};$

Wherein, described w _vfor the vertical dimensions weighing vector that dimension is 1xS, described in

Further, due to all vertical polarized antenna oscillators of described base station and the channel matrix of terminal room can be shown below:

$H_{S\×N}^{\mathrm{Ver}}=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Ver}}\right\}{h}_V^T{h}_H;$

Therefore, if the signal to noise ratio that hypothesis down channel is estimated is higher, then correspondingly, the vertical dimensions equivalent channel obtained is estimated according to the CSI-RS received can be expressed as:

${\tilde{h}}_{S\×1}^{\mathrm{Ver}}=H_{S\×N}^{\mathrm{Ver}}{w}_H^T=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Ver}}\right\}{h}_V^T{h}_H{w}_H^T=h_0\exp \left\{j{\mathrm{\ω}}_0^{\mathrm{Ver}}\right\}{a}_H{h}_V^T;$

Wherein, described w _hfor the horizontal dimensions weighing vector that dimension is 1xN, described in

Further, the vertical dimensions equivalent channel that the horizontal dimensions equivalent channel obtained from above-mentioned estimation and estimation obtain, the directional information of the vertical dimensions equivalent channel that the directional information of the horizontal dimensions equivalent channel that described estimation obtains and estimation obtain can be expressed as and ${\stackrel{\→}{h}}_V=h_V/\left|\right|h_V\left|\right|,$ Wherein, ${\stackrel{\‾}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}=\left[\begin{array}{cc}{h}_H& \exp \left\{j({\mathrm{\ω}}_0^{\mathrm{Ver}}-{\mathrm{\ω}}_0^{\mathrm{Hor}})\right\}{h}_H\end{array}\right].$

Further, it should be noted that, from the computational process of above-mentioned CQI, when carrying out the calculating of CQI, need use and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI of obtained horizontal dimensions and the PMI of vertical dimensions.That is, in embodiment of the present invention, after estimating to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and according to the CSI-RS received, before described vertical dimensions weighing vector and described CQI indication information calculate corresponding CQI, also can quantize the directional information of the vertical dimensions equivalent channel that the directional information and estimation of estimating the horizontal dimensions equivalent channel obtained obtain respectively, with the PMI of the PMI and vertical dimensions that obtain horizontal dimensions, namely, will prior to the calculating to CQI to the calculating of PMI, the embodiment of the present invention does not repeat this.

Further, in embodiment of the present invention, terminal is after calculating corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive, and described method can also comprise:

Give described base station by described CQI feedback, reconstruct 3D mimo channel to make described base station based on the described CQI received.It should be noted that, described terminal, before giving described base station by described CQI feedback, also can quantize the described CQI calculated usually accordingly; Correspondingly, the CQI feeding back to described base station can be the CQI after quantizing accordingly usually, and the embodiment of the present invention does not repeat this.

Further, in embodiment of the present invention, terminal described CQI feedback to be given while described base station or before, described method can also comprise:

The directional information and terminal of respectively terminal being estimated to the horizontal dimensions equivalent channel obtained are estimated that the PMI of PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions feeds back to described base station; To make described base station after the PMI receiving the PMI of described CQI and described horizontal dimensions, described vertical dimensions, based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3D mimo channel.

Embodiments provide a kind of information defining method, terminal is when the information sent according to base station carries out the isoparametric calculating of CQI, except the CSI-RS parameter that reference base station sends, also can reference base station send mapping is weighted to 3D-MIMO antenna time the vertical dimensions weighing vector that adopts and the CQI indication information being used to indicate the CQI account form that terminal need adopt, thus the original CQI of correction can be reached to a certain extent, to improve the object of the calculating accuracy of CQI.

Embodiment three:

The embodiment of the present invention three provides a kind of channel reconstruction method being applicable to 3D-MIMO system, and as shown in Figure 6, it is the schematic flow sheet of channel reconstruction method described in the embodiment of the present invention three, and described channel reconstruction method can comprise the following steps:

Step 301: the CQI of base station receiving terminal feedback; Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and the described base station CQI indication information that according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector is weighted to 3D mimo antenna and is used to indicate the CQI account form that terminal need adopt calculate.

It should be noted that, the computational process that the CSI-RS that terminal sends according to base station, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt calculate the process of corresponding CQI and the CQI described in the embodiment of the present invention two is similar, and the embodiment of the present invention repeats no more this.

Step 302: base station reconstructs 3D mimo channel based on the described CQI received.

Particularly, in embodiment of the present invention, base station is before reconstructing 3DMIMO channel based on the described CQI received, and described method can also comprise:

Receive the PMI of the horizontal dimensions of described terminal feedback and the PMI of vertical dimensions; Wherein, the directional information of the vertical dimensions equivalent channel obtained estimated by the CSI-RS that the directional information of the horizontal dimensions equivalent channel obtained estimated by the PMI of described horizontal dimensions and the PMI of the vertical dimensions CSI-RS that to be described terminal respectively send according to base station described terminal and described terminal send according to base station obtains after carrying out quantizing.Particularly, the description based on the embodiment of the present invention two is known, and terminal estimates that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained can be expressed as correspondingly, terminal is estimated to directional information and the terminal of the horizontal dimensions equivalent channel obtained estimate that the PMI of instruction PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions can be expressed as the embodiment of the present invention repeats no more this.

Correspondingly, reconstruct 3D mimo channel based on the described CQI received, can comprise:

Based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3D mimo channel.

Particularly, the CSI-RS that the described CQI received for base station sends according to base station for described terminal, described vertical dimensions weighing vector and be used to indicate the single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, reconstruct 3D mimo channel based on the described CQI received, can comprise:

Corresponding 3D mimo channel is obtained according to following expression re-formation

${\hat{H}}_{S\×2N}^{\mathrm{All}}=C\hat{Q}I{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\stackrel{\widehat{\→}}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}};$

Wherein, described in for the quantized value of described single CQI; Described for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received.

Further, if the described CQI that base station the receives CSI-RS, the described vertical dimensions weighing vector that send according to base station for described terminal and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of two CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallyat interior two CQI, then reconstruct 3D mimo channel based on the described CQI received, can comprise:

Corresponding 3D mimo channel is obtained according to following expression re-formation

Wherein, described in for the quantized value of the CQI level of described horizontal dimensions; Described for described vertical dimensions quantized value, described in for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received.

Further, it should be noted that, if the CSI-RS that the described CQI received sends according to base station for described terminal, described vertical dimensions weighing vector and be used to indicate the single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, then described single CQI can be expressed as usually:

If the CSI-RS that the described CQI received sends according to base station for described terminal, described vertical dimensions weighing vector and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of two CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallyat interior two CQI, the then CQI of described horizontal dimensions ^leveland the CQI of vertical dimensions ^verticallyusually can be expressed as:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains; Described

It should be noted that, concrete formula corresponding to above-mentioned each parameter can see the detailed description in example two of the present invention, and the embodiment of the present invention three repeats no more this.

Embodiments provide a kind of channel reconstruction method, base station can according to terminal feedback, the CSI-RS that sent according to base station by described terminal, mapping is weighted to 3D-MIMO antenna time the vertical dimensions weighing vector that adopts and the CQI that calculates of the CQI indication information that is used to indicate the CQI account form that terminal need adopt, realize the reconstruct of corresponding 3D-MIMO channel, thus providing on a kind of basis being applicable to the channel reconstruction method of 3D-MIMO system etc. newly, the object improving systematic function can be reached.

Embodiment four:

The embodiment of the present invention four provide a kind of can in order to realize the base station of method shown in the embodiment of the present invention one, as shown in Figure 7, it can comprise weighting map unit 11 and information transmitting unit 12 for the structural representation of base station described in the embodiment of the present invention four, described base station, wherein:

Described weighting map unit 11 can be used for being weighted mapping to 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively; Wherein, the weighing vector of described vertical dimensions weighing vector to be dimension be 1xS, the weighing vector of described horizontal dimensions weighing vector to be dimension be 1xN; Described S, N are positive integer, and described S represents the antenna oscillator number of vertical dimensions, antenna oscillator number that described N represents horizontal dimensions, that belong to same polarised direction.

Particularly, the vertical dimensions weighing vector that it is 1xS that described weighting map unit 11 can be used for according to the dimension of setting is weighted each the array antenna oscillator in 3D mimo antenna, to obtain the equivalent level antenna port array that dimension is 1x2N, and and then obtain corresponding horizontal dimensions equivalent channel; Or,

The horizontal dimensions weighing vector that specifically to can be used for according to dimension be 1xN is weighted the every a line antenna element belonging to any one group of poliarizing antenna of same polarised direction in 3D mimo antenna, to obtain the equivalent vertical antenna array of ports that dimension is 1xS dimension, and and then obtain corresponding vertical dimensions equivalent channel, the embodiment of the present invention is not limited in any way this.

Described information transmitting unit 12 can be used for the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt to send to terminal, calculates corresponding CQI to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

Particularly, described information transmitting unit 12 specifically can be used for respectively by described horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant with described vertical dimensions equivalent channel are sent to terminal; And, when carrying out the transmission of CSI-RS, in order to reduce the mutual interference between signal, usually mutually orthogonal mode can be adopted to send the described CSI-RS relevant to described horizontal dimensions equivalent channel and the CSI-RS relevant with described vertical dimensions equivalent channel, and the embodiment of the present invention does not repeat this.

Further, described information transmitting unit 12 specifically also can be used for adopting existing signaling or new definition signaling to send corresponding vertical dimensions weighing vector and CQI indication information to described terminal, and the embodiment of the present invention is not limited in any way this.

Wherein, the value matched with corresponding CQI account form can be carried in described CQI indication information, as the first set point of matching with single CQI account form, (this first set point can set according to actual conditions, as 1 etc. can be set to) or the second set point of matching with two CQI account form (this second set point also can set according to actual conditions, as 0 etc. can be set to) etc., to make described terminal according to the value of carrying in the described CQI indication information received, determine the CQI account form matched with entrained value.

Particularly, in embodiment of the present invention, the setting of the value of CQI indication information can be carried out in such a way: when described CQI account form is single CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is two CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

That is, when the value of described CQI indication information is 1, can think that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form; When the value of described CQI indication information be 0 or for corresponding default value etc. time, then can think that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form.

Certainly it should be noted that, in embodiment of the present invention, also can carry out the setting of the value of CQI indication information according to other modes.Such as, when described CQI account form is two CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is single CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

Further, described information transmitting unit 12 is specifically used in and sends to the described CQI indication information of described terminal to be when to be used to indicate CQI account form that terminal need adopt be the CQI indication information of single CQI account form, to make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

Or, specifically be used in and send to the described CQI indication information of described terminal to be when to be used to indicate CQI account form that terminal need adopt be the CQI indication information of two CQI account form, to make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

The embodiment of the present invention four provides a kind of base station, described base station can be weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and by the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant to described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt send to terminal, to make described terminal according to the CSI-RS received, vertical dimensions weighing vector and corresponding CQI indication information calculate corresponding CQI, thus can on the basis of CSI-RS send mode and CQI computational methods etc. providing a kind of 3D-MIMO system that is applicable to newly, reach and improve CSI-RS transmitting power, reduce the object that CSI-RS takies the calculating accuracy of expense and raising CQI.

Embodiment five:

The embodiment of the present invention five provide a kind of can in order to realize the terminal of method shown in the embodiment of the present invention two, as shown in Figure 8, it can comprise information receiving unit 21 and information determination unit 22 for the structural representation of terminal described in the embodiment of the present invention five, described terminal, wherein:

Described information receiving unit 21 can be used for the transmission of reception base station, according to the vertical dimensions weighing vector set, the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains is weighted to 3D mimo antenna to described base station, according to the horizontal dimensions weighing vector set, the relevant CSI-RS of vertical dimensions equivalent channel that mapping obtains is weighted to 3D mimo antenna to described base station, described vertical dimensions weighing vector and be used to indicate the CQI indication information of the CQI account form that terminal need adopt,

CSI-RS, described vertical dimensions weighing vector and described CQI indication information that described information determination unit 22 can be used for according to receiving calculate corresponding CQI.

Wherein, the value matched with corresponding CQI account form can be carried in described CQI indication information, as the first set point of matching with single CQI account form, (this first set point can set according to actual conditions, as 1 etc. can be set to) or the second set point of matching with two CQI account form (this second set point also can set according to actual conditions, as 0 etc. can be set to) etc., to make described information determination unit 22 according to the value of carrying in the described CQI indication information received, determine the CQI account form matched with entrained value.

Particularly, the setting of the value of described CQI indication information is identical with the set-up mode of the value of the CQI indication information described in the embodiment of the present invention one.Such as, when described CQI account form is single CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is two CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (e.g., any numerical value can not be set, maintenance space state).

That is, described information determination unit 22 specifically can be used for when according to the described CQI indication information that receives, when the value determining described CQI indication information is 1, can think that the CQI account form indicated by described base station is single CQI account form; Or, specifically can be used for when according to the described CQI indication information that receives, determine the value of described CQI indication information be 0 or for corresponding default value etc. time, then can think that the CQI account form indicated by described base station is two CQI account forms.

Certainly it should be noted that, in embodiment of the present invention, also can carry out the setting of the value of CQI indication information according to other modes.Such as, when described CQI account form is two CQI account form, the value of described CQI indication information can be set to 1; When described CQI account form is single CQI account form, the value of described CQI indication information can be set to 0 or other non-1 numerical value or other default values (as, any numerical value can not be set, keep space state), the embodiment of the present invention is not limited in any way this.

Further, if described information determination unit 22 specifically can be used for the described CQI indication information according to receiving, determine that the CQI account form that need adopt is single CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and in conjunction with described vertical dimensions weighing vector w _vcorresponding CQI is obtained according to following formulae discovery:

Or, if specifically can be used for the described CQI indication information according to receiving, determine that the CQI account form that need adopt is two CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and in conjunction with described vertical dimensions weighing vector w _vthe CQI of corresponding horizontal dimensions is calculated respectively according to following formula ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

Further, it should be noted that, from the computational process of above-mentioned CQI, when carrying out the calculating of CQI, need use and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the PMI of obtained horizontal dimensions and the PMI of vertical dimensions.That is, in embodiment of the present invention, after described information determination unit 22 is also used in and estimates to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS that receives, and according to the CSI-RS received, before described vertical dimensions weighing vector and described CQI indication information calculate corresponding CQI, respectively the directional information of the vertical dimensions equivalent channel that the directional information and estimation of estimating the horizontal dimensions equivalent channel obtained obtain is quantized, with the PMI of the PMI and vertical dimensions that obtain horizontal dimensions, the embodiment of the present invention does not repeat this.

Further, in embodiment of the present invention, described terminal also can comprise information transmitting unit 23, wherein:

After described information transmitting unit 23 is used in and calculates corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive, give described base station by described CQI feedback, reconstruct 3D mimo channel to make described base station based on the described CQI received.It should be noted that, described information transmitting unit 23, before giving described base station by described CQI feedback, also can quantize the described CQI calculated usually accordingly; Correspondingly, the CQI feeding back to described base station can be the CQI after quantizing accordingly usually, and the embodiment of the present invention does not repeat this.

Further, described information transmitting unit 23 is also used in described CQI feedback to while described base station or before, the directional information and terminal of respectively terminal being estimated to the horizontal dimensions equivalent channel obtained are estimated that the PMI of PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions feeds back to described base station, to make described base station at the PMI receiving described CQI and described horizontal dimensions, after the PMI of described vertical dimensions, based on the PMI of the described CQI received and the described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3DMIMO channel.

The embodiment of the present invention five provides a kind of terminal, described terminal is when the information sent according to base station carries out the isoparametric calculating of CQI, except the CSI-RS parameter that reference base station sends, also can reference base station send mapping is weighted to 3D-MIMO antenna time the vertical dimensions weighing vector that adopts and the CQI indication information being used to indicate the CQI account form that terminal need adopt, thus the original CQI of correction can be reached to a certain extent, to improve the object of the calculating accuracy of CQI.

Embodiment six:

The embodiment of the present invention six provide a kind of can in order to realize the base station of method shown in the embodiment of the present invention three, as shown in Figure 9, it can comprise information receiving unit 31 and channel reconstruction unit 32 for the structural representation of base station described in the embodiment of the present invention six, described base station, wherein:

Described information receiving unit 31 can be used for the CQI of receiving terminal feedback; Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3DMIMO antenna be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and the described base station CQI indication information that according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector is weighted to 3D mimo antenna and is used to indicate the CQI account form that terminal need adopt calculate;

The described CQI that described channel reconstruction unit 32 can be used for receiving based on described information receiving unit 31 reconstructs 3D mimo channel.

Particularly, in embodiment of the present invention, described information receiving unit 31 is also used in described channel reconstruction unit 32 based on before the described CQI reconstruct 3D mimo channel received, and receives the PMI of the horizontal dimensions of described terminal feedback and the PMI of vertical dimensions; Wherein, the directional information of the vertical dimensions equivalent channel obtained estimated by the CSI-RS that the directional information of the horizontal dimensions equivalent channel obtained estimated by the PMI of described horizontal dimensions and the PMI of the vertical dimensions CSI-RS that to be described terminal respectively send according to base station described terminal and described terminal send according to base station obtains after carrying out quantizing.Particularly, the description based on the embodiment of the present invention two is known, and terminal estimates that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained can be expressed as correspondingly, terminal is estimated to directional information and the terminal of the horizontal dimensions equivalent channel obtained estimate that the PMI of PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions can be expressed as the embodiment of the present invention repeats no more this.

Correspondingly, described channel reconstruction unit 32 specifically can be used for based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, and reconstruct obtains corresponding 3D mimo channel.

Particularly, when described channel reconstruction unit 32 specifically can be used for the CSI-RS when the described CQI that described information receiving unit 31 receives sends according to base station for described terminal, described vertical dimensions weighing vector and is used to indicate single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, obtain corresponding 3D mimo channel according to following expression re-formation

${\hat{H}}_{S\×2N}^{\mathrm{All}}=C\hat{Q}I{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\stackrel{\widehat{\→}}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}};$

Wherein, described in for the quantized value of described single CQI; Described for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received;

Or, the CSI-RS that the described CQI that specifically can be used for receiving when described information receiving unit 31 sends according to base station for described terminal, described vertical dimensions weighing vector and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of pair CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallywhen interior two CQI, obtain corresponding 3D mimo channel according to following expression re-formation

Wherein, described in for the CQI of described horizontal dimensions ^levelquantized value; Described for described vertical dimensions quantized value, described in for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received.

Further, it should be noted that, if the CSI-RS that the described CQI that described information receiving unit 31 receives sends according to base station for described terminal, described vertical dimensions weighing vector and be used to indicate the single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, then described single CQI can be expressed as:

If the CSI-RS that the described CQI that described information receiving unit 31 receives sends according to base station for described terminal, described vertical dimensions weighing vector and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of two CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallyat interior two CQI, the then CQI of described horizontal dimensions ^leveland the CQI of vertical dimensions ^verticallycan be expressed as:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains; Described

The embodiment of the present invention six provides a kind of base station, described base station can according to terminal feedback, the CSI-RS that sent according to base station by described terminal, mapping is weighted to 3D-MIMO antenna time the vertical dimensions weighing vector that adopts and the CQI that calculates of the CQI indication information that is used to indicate the CQI account form that terminal need adopt, realize the reconstruct of corresponding 3D-MIMO channel, thus providing on a kind of basis being applicable to the channel reconstruction method of 3D-MIMO system etc. newly, the object improving systematic function can be reached.

Embodiment seven:

The embodiment of the present invention seven provide a kind of can in order to realize the information determining system of method shown in the embodiment of the present invention one or embodiment two, as shown in Figure 10, it is the structural representation of information determining system described in the embodiment of the present invention seven, described information determining system can comprise at least one base station 41 and at least one terminal 42, wherein:

Described base station 41 can be used for being weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the CQI account form that terminal need adopt are sent to described terminal 42;

Described terminal 42 can be used for receiving described base station 41 sends the CSI-RS relevant to described horizontal dimensions equivalent channel, CSI-RS, described vertical dimensions weighing vector and the described CQI indication information relevant with described vertical dimensions equivalent channel, and according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, calculate corresponding CQI.

Particularly, described base station 41 is weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, similar to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel and to send the respective process described in the process of corresponding CSI-RS and the embodiment of the present invention one or embodiment four, the embodiment of the present invention repeats no more this; In addition, the computational process that the CSI-RS that described terminal 42 sends according to base station 41, described vertical dimensions weighing vector and described CQI indication information calculate the process of corresponding CQI and the embodiment of the present invention two or the CQI described in embodiment five is similar, and the embodiment of the present invention also repeats no more this.

The embodiment of the present invention seven provides a kind of information determining system being applicable to 3D-MIMO system, within the system, base station can be weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and by the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant to described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information being used to indicate the CQI account form that terminal need adopt send to terminal, to make described terminal according to the CSI-RS received, vertical dimensions weighing vector and CQI indication information calculate corresponding CQI, thus can on the basis of CSI-RS send mode and CQI computational methods etc. providing a kind of 3D-MIMO system that is applicable to newly, reach and improve CSI-RS transmitting power, reduce the object that CSI-RS takies the calculating accuracy of expense and raising CQI.

Embodiment eight:

The embodiment of the present invention eight provide a kind of can in order to realize the channel reconstruction system of method shown in the embodiment of the present invention three, as shown in figure 11, it is the structural representation of channel reconstruction system described in the embodiment of the present invention eight, described channel reconstruction system can comprise at least one base station 51 and at least one terminal 52, wherein:

Described base station 51 can be used for the CQI receiving described terminal 52 feedback, and reconstructs 3D mimo channel based on the described CQI received;

Described terminal 52 can be used for feeding back corresponding CQI to described base station 51; Wherein, described CQI is that described terminal 52 sent, and be weighted the relevant CSI-RS of horizontal dimensions equivalent channel that mapping obtains to described base station 51 according to the vertical dimensions weighing vector set to 3D mimo antenna, be weighted the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector with described base station 52 according to the horizontal dimensions weighing vector set to 3D mimo antenna and be used to indicate the CQI account form that terminal need adopt CQI indication information according to described base station 51 calculates.

Particularly, described base station 51 receives the CQI of described terminal 52 feedback, and it is similar to reconstruct the channel reconstruction process described in the process of 3D mimo channel and the embodiment of the present invention three or embodiment six based on the described CQI received, the embodiment of the present invention repeats no more this.

The embodiment of the present invention eight provides a kind of channel reconstruction system, within the system, base station can according to the CSI-RS sent according to base station by described terminal of terminal feedback, mapping is weighted to 3D-MIMO antenna time the vertical dimensions weighing vector that adopts and the CQI that calculates of the CQI indication information that is used to indicate the CQI account form that terminal need adopt, realize the reconstruct of corresponding 3D-MIMO channel, thus providing on a kind of basis being applicable to the channel reconstruction method of 3D-MIMO system etc. newly, the object improving systematic function can be reached.

It will be understood by those skilled in the art that embodiments of the invention can be provided as method, device (equipment) or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, device (equipment) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (30)

1. a method for sending information, is characterized in that, comprising:

Base station is weighted mapping to three-dimensional multiple-input and multiple-output 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively; And

The channel state information reference signals CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the channel quality indicator (CQI) account form that terminal need adopt are sent to terminal, calculates corresponding CQI to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

2. method for sending information as claimed in claim 1, it is characterized in that, if described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form, then to make described terminal calculate corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, comprising:

To make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

If described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form, then to make described terminal calculate corresponding CQI according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information, comprising:

To make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described with be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the pre-coding matrix instruction PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

3., as right wants the method for sending information as described in 2, it is characterized in that,

If the value of described CQI indication information is the first set point matched with single CQI account form, then represent that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form;

If the value of described CQI indication information is the second set point matched with two CQI account form, then represent that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form.

4. the method for sending information as described in as arbitrary in claims 1 to 3, is characterized in that,

The weighing vector of described vertical dimensions weighing vector to be dimension be 1xS, the weighing vector of described horizontal dimensions weighing vector to be dimension be 1xN;

Wherein, described S, N are positive integer, and described S represents the antenna oscillator number of vertical dimensions, antenna oscillator number that described N represents horizontal dimensions, that belong to same polarised direction.

5. the method for sending information as described in as arbitrary in claims 1 to 3, is characterized in that, the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant with described vertical dimensions equivalent channel is sent to terminal, comprising:

Respectively by described horizontal dimensions equivalent channel and vertical dimensions equivalent channel, the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant with described vertical dimensions equivalent channel are sent to terminal; Further,

When carrying out the transmission of CSI-RS, mutually orthogonal mode is adopted to send the described CSI-RS relevant to described horizontal dimensions equivalent channel and the CSI-RS relevant with described vertical dimensions equivalent channel.

6. an information defining method, is characterized in that, comprising:

Terminal receives base station transmission, according to the vertical dimensions weighing vector set, the relevant channel state information reference signals CSI-RS of horizontal dimensions equivalent channel that mapping obtains is weighted to three-dimensional multiple-input and multiple-output 3D mimo antenna to described base station, according to the horizontal dimensions weighing vector set, the relevant CSI-RS of vertical dimensions equivalent channel that mapping obtains is weighted to 3DMIMO antenna to described base station, described vertical dimensions weighing vector and be used to indicate the CQI indication information of the channel quality indicator (CQI) account form that terminal need adopt, and

Corresponding CQI is calculated according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

7. information defining method as claimed in claim 6, is characterized in that, calculate corresponding CQI, comprising according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information:

If according to the described CQI indication information received, determine that the CQI account form that need adopt is single CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

Or, if according to the described CQI indication information received, determine that the CQI account form that need adopt is two CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the pre-coding matrix instruction PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

8. information defining method as claimed in claim 7, is characterized in that,

If according to the described CQI indication information received, determine that the value of described CQI indication information is the first set point matched with single CQI account form, then determine that the CQI account form that need adopt is single CQI account form;

If according to the described CQI indication information received, determine that the value of described CQI indication information is the second set point matched with two CQI account form, then determine that the CQI account form that need adopt is two CQI account form.

9. the information defining method as described in as arbitrary in claim 6 ~ 8, is characterized in that, after calculating corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive, described method also comprises:

Give described base station by described CQI feedback, reconstruct 3D mimo channel to make described base station based on the described CQI received.

10. information defining method as claimed in claim 9, is characterized in that, while giving described base station by described CQI feedback or before, described method also comprises:

The directional information and terminal of respectively terminal being estimated to the horizontal dimensions equivalent channel obtained are estimated that the PMI of PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions feeds back to described base station;

To make described base station reconstruct 3D mimo channel based on the described CQI received, comprising:

To make described base station based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3D mimo channel.

11. 1 kinds of channel reconstruction methods, is characterized in that, comprising:

The channel quality indicator (CQI) of base station receiving terminal feedback; And

Based on the described CQI Reconstruction of three-dimensional multiple-input and multiple-output 3D mimo channel received;

Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant channel state information reference signals CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and the described base station CQI indication information that according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector is weighted to 3D mimo antenna and is used to indicate the CQI account form that terminal need adopt calculate.

12. channel reconstruction methods as claimed in claim 11, is characterized in that, before reconstructing 3D mimo channel based on the described CQI received, described method also comprises:

Receive the pre-coding matrix instruction PMI of the horizontal dimensions of described terminal feedback and the PMI of vertical dimensions, wherein, the directional information of the vertical dimensions equivalent channel obtained estimated by the CSI-RS that the directional information of the horizontal dimensions equivalent channel obtained estimated by the PMI of described horizontal dimensions and the PMI of the vertical dimensions CSI-RS that to be described terminal respectively send according to base station described terminal and described terminal send according to base station obtains after carrying out quantizing;

Reconstruct 3D mimo channel based on the described CQI received, comprising:

Based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3D mimo channel.

13. channel reconstruction methods as claimed in claim 12, it is characterized in that, if the CSI-RS that the described CQI received sends according to base station for described terminal, described vertical dimensions weighing vector and be used to indicate the single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, then reconstruct 3D mimo channel based on the described CQI received, comprising:

Corresponding 3D mimo channel is obtained according to following expression re-formation

${\hat{H}}_{S\×2N}^{\mathrm{All}}=C\hat{Q}I{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\stackrel{\widehat{\→}}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}};$

Wherein, described in for the quantized value of described single CQI; Described for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received;

If the CSI-RS that the described CQI received sends according to base station for described terminal, described vertical dimensions weighing vector and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of two CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallyat interior two CQI, then reconstruct 3D mimo channel based on the described CQI received, comprising:

Corresponding 3D mimo channel is obtained according to following expression re-formation

Wherein, described in for the quantized value of the CQI level of described horizontal dimensions; Described for described vertical dimensions quantized value.

14. channel reconstruction methods as claimed in claim 13, it is characterized in that, described single CQI is expressed as:

The CQI of described horizontal dimensions ^leveland the CQI of vertical dimensions ^verticallybe expressed as:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains; Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained.

15. 1 kinds of base stations, is characterized in that, comprising:

Weighting map unit, for being weighted mapping to three-dimensional multiple-input and multiple-output 3D mimo antenna, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector respectively;

Information transmitting unit, for the channel state information reference signals CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the channel quality indicator (CQI) account form that terminal need adopt are sent to terminal, calculate corresponding channel quality indicator (CQI) to make described terminal according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

16. base stations as claimed in claim 15, is characterized in that,

Described information transmitting unit, specifically for sending to the described CQI indication information of described terminal to be when to be used to indicate CQI account form that terminal need adopt be the CQI indication information of single CQI account form, to make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

Or, specifically for sending to the described CQI indication information of described terminal to be when to be used to indicate CQI account form that terminal need adopt be the CQI indication information of two CQI account form, to make described terminal estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the pre-coding matrix instruction PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

17. base stations as claimed in claim 16, is characterized in that,

If the value of described CQI indication information is the first set point matched with single CQI account form, then represent that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is single CQI account form;

If the value of described CQI indication information is the second set point matched with two CQI account form, then represent that described CQI indication information is be used to indicate the CQI indication information that CQI account form that terminal need adopt is two CQI account form.

18. as arbitrary in claim 15 ~ 17 as described in base station, it is characterized in that,

The weighing vector of described vertical dimensions weighing vector to be dimension be 1xS, the weighing vector of described horizontal dimensions weighing vector to be dimension be 1xN;

Wherein, described S, N are positive integer, and described S represents the antenna oscillator number of vertical dimensions, antenna oscillator number that described N represents horizontal dimensions, that belong to same polarised direction.

19. as arbitrary in claim 15 ~ 17 as described in base station, it is characterized in that,

Described information transmitting unit, specifically for respectively by described horizontal dimensions equivalent channel and vertical dimensions equivalent channel, sends to terminal by the CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS relevant with described vertical dimensions equivalent channel; Further,

When carrying out the transmission of CSI-RS, mutually orthogonal mode is adopted to send the described CSI-RS relevant to described horizontal dimensions equivalent channel and the CSI-RS relevant with described vertical dimensions equivalent channel.

20. 1 kinds of terminals, is characterized in that, comprising:

Information receiving unit, for receive base station send, according to the vertical dimensions weighing vector set, the relevant channel state information reference signals CSI-RS of horizontal dimensions equivalent channel that mapping obtains is weighted to three-dimensional multiple-input and multiple-output 3D mimo antenna to described base station, according to the horizontal dimensions weighing vector set, the relevant CSI-RS of vertical dimensions equivalent channel that mapping obtains is weighted to 3D mimo antenna to described base station, described vertical dimensions weighing vector and be used to indicate the CQI indication information of the channel quality indicator (CQI) account form that terminal need adopt,

Information determination unit, for calculating corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive.

21. terminals as claimed in claim 20, is characterized in that,

Described information determination unit, if specifically for according to the described CQI indication information received, determine that the CQI account form that need adopt is single CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and obtain corresponding CQI in conjunction with described vertical dimensions weighing vector according to following formulae discovery:

Or, if specifically for according to the described CQI indication information received, determine that the CQI account form that need adopt is two CQI account form, then estimate to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel according to the CSI-RS received, and calculate the CQI of corresponding horizontal dimensions respectively according to following formula in conjunction with described vertical dimensions weighing vector ^leveland the CQI of vertical dimensions ^vertically:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains;

Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained; Described be respectively and terminal is estimated that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate that the directional information of the vertical dimensions equivalent channel obtained quantizes the pre-coding matrix instruction PMI of obtained horizontal dimensions and the PMI of vertical dimensions.

22. terminals as claimed in claim 21, is characterized in that,

Described information determination unit, if specifically for according to the described CQI indication information received, determine that the value of described CQI indication information is the first set point matched with single CQI account form, then determine that the CQI account form that need adopt is single CQI account form; Or, if according to the described CQI indication information received, determine that the value of described CQI indication information is the second set point matched with two CQI account form, then determine that the CQI account form that need adopt is two CQI account form.

23. as arbitrary in claim 20 ~ 22 as described in terminal, it is characterized in that, described terminal also comprises information transmitting unit:

Described information transmitting unit, for after calculating corresponding CQI according to the CSI-RS, described vertical dimensions weighing vector and the described CQI indication information that receive, give described base station by described CQI feedback, reconstruct 3D mimo channel to make described base station based on the described CQI received.

24. terminals as claimed in claim 23, is characterized in that,

Described information transmitting unit, also for described CQI feedback to be given while described base station or before, the directional information and terminal of respectively terminal being estimated to the horizontal dimensions equivalent channel obtained are estimated that the PMI of PMI and vertical dimensions that the directional information of the vertical dimensions equivalent channel obtained quantizes obtained horizontal dimensions feeds back to described base station, to make described base station based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstruct obtains corresponding 3D mimo channel.

25. 1 kinds of base stations, is characterized in that, comprising:

Information receiving unit, for the channel quality indicator (CQI) of receiving terminal feedback;

Channel reconstruction unit, for the described CQI Reconstruction of three-dimensional multiple-input and multiple-output 3D mimo channel received based on described information receiving unit;

Wherein, described CQI to be described terminal send according to base station, with described base station according to the vertical dimensions weighing vector set to 3D mimo antenna be weighted the relevant channel state information reference signals CSI-RS of horizontal dimensions equivalent channel that mapping obtains, and the described base station CQI indication information that according to the horizontal dimensions weighing vector set the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector is weighted to 3D mimo antenna and is used to indicate the CQI account form that terminal need adopt calculate.

26. base stations as claimed in claim 25, is characterized in that,

Described information receiving unit, also for before described channel reconstruction unit is based on the described CQI reconstruct 3D mimo channel received, receive the pre-coding matrix instruction PMI of the horizontal dimensions of described terminal feedback and the PMI of vertical dimensions, wherein, the directional information of the vertical dimensions equivalent channel obtained estimated by the CSI-RS that the directional information of the horizontal dimensions equivalent channel obtained estimated by the PMI of described horizontal dimensions and the PMI of the vertical dimensions CSI-RS that to be described terminal respectively send according to base station described terminal and described terminal send according to base station obtains after carrying out quantizing,

Described channel reconstruction unit, specifically for based on the described CQI received and the PMI of described horizontal dimensions received, the PMI of vertical dimensions, reconstructs and obtains corresponding 3D mimo channel.

27. base stations as claimed in claim 26, is characterized in that,

Described channel reconstruction unit, the CSI-RS sent according to base station for described terminal specifically for the described CQI received when described information receiving unit, described vertical dimensions weighing vector and when being used to indicate single CQI that CQI indication information that CQI account form that terminal need adopt is single CQI account form calculates, obtain corresponding 3D mimo channel according to following expression re-formation

${\hat{H}}_{S\×2N}^{\mathrm{All}}=C\hat{Q}I{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\stackrel{\widehat{\→}}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}};$

Wherein, described in for the quantized value of described single CQI; Described for the PMI of horizontal dimensions received, described in for the PMI of vertical dimensions received; Or,

The CSI-RS sent according to base station for described terminal specifically for the described CQI received when described information receiving unit, described vertical dimensions weighing vector and to be used to indicate CQI account form that terminal need adopt be the CQI comprising horizontal dimensions that the CQI indication information of pair CQI account form calculates ^leveland the CQI of vertical dimensions ^verticallywhen interior two CQI, obtain corresponding 3D mimo channel according to following expression re-formation

Wherein, described in for the CQI of described horizontal dimensions ^levelquantized value; Described for described vertical dimensions quantized value.

28. base stations as claimed in claim 27, it is characterized in that, described single CQI is expressed as:

The CQI of described horizontal dimensions ^leveland the CQI of vertical dimensions ^verticallybe expressed as:

Wherein, described in described for terminal estimates the horizontal dimensions equivalent channel that obtains;

Described described for terminal estimates the vertical dimensions equivalent channel that obtains;

Described described w _vfor described vertical dimensions weighing vector; Described for the variance of the Noise and Interference that terminal measurement obtains; Described $\mathrm{\η}={\left|\mathrm{vec}{\left\{{\stackrel{\widehat{\→}}{h}}_V^T{\stackrel{\widehat{\→}}{h}}_{1\×2N}^{\mathrm{All}}\right\}}^T\mathrm{vec}\right\{{\stackrel{\→}{h}}_V^T{\stackrel{\stackrel{\→}{\‾}}{h}}_{1\×2N}^{\mathrm{All}\_\mathrm{Vec}}\left\}\right|}^2;$ Described be respectively terminal and estimate that the directional information of the horizontal dimensions equivalent channel obtained and terminal estimate the directional information of the vertical dimensions equivalent channel obtained.

29. 1 kinds of information determining systems, is characterized in that, described system comprises base station and terminal, wherein:

Described base station, for being weighted mapping according to the vertical dimensions weighing vector set and horizontal dimensions weighing vector to three-dimensional multiple-input and multiple-output 3D mimo antenna respectively, to obtain corresponding horizontal dimensions equivalent channel and vertical dimensions equivalent channel, and the channel state information reference signals CSI-RS relevant to described horizontal dimensions equivalent channel, the CSI-RS be correlated with described vertical dimensions equivalent channel, described vertical dimensions weighing vector and the CQI indication information that is used to indicate the channel quality indicator (CQI) account form that terminal need adopt are sent to described terminal;

Described terminal, for receiving the CSI-RS relevant to described horizontal dimensions equivalent channel that described base station sends, CSI-RS, described vertical dimensions weighing vector and the described CQI indication information relevant with described vertical dimensions equivalent channel, and calculate corresponding channel quality indicator (CQI) according to the CSI-RS received, described vertical dimensions weighing vector and described CQI indication information.

30. 1 kinds of channel reconstruction systems, is characterized in that, described system comprises base station and terminal, wherein:

Described base station, for receiving the channel quality indicator (CQI) of described terminal feedback, and based on the described CQI Reconstruction of three-dimensional multiple-input and multiple-output 3D mimo channel received;

Described terminal, for the corresponding CQI of described base station feedback; Wherein, described CQI is that described terminal sent, and be weighted the relevant channel state information reference signals CSI-RS of horizontal dimensions equivalent channel that mapping obtains to described base station according to the vertical dimensions weighing vector set to 3D mimo antenna, be weighted the CSI-RS that vertical dimensions equivalent channel that mapping obtains is correlated with, described vertical dimensions weighing vector with described base station according to the horizontal dimensions weighing vector set to 3D mimo antenna and be used to indicate the CQI account form that terminal need adopt CQI indication information according to described base station calculates.