CN101964700A - Signal transmission processing method, signal transmission control method, signal transmission system, user equipment (UE) and base station - Google Patents

Abstract

The embodiment of the invention discloses a signal transmission processing method, a signal transmission control method, a signal transmission system, user equipment (UE) and a base station. The signal transmission processing method comprises the following steps of: receiving first signal-to-noise ratio offset sent by the base station; acquiring channel quality indicator (CQI) information transmitted in a second-layer space according to a codebook and the first signal-to-noise ratio offset, wherein the codebook comprises a codebook transmitted by the base station or a codebook predetermined by the base station; and feeding the CQI information back to the base station, so that the base station performs signal transmission processing according to the CQI information. In the embodiment of the invention, the UE is only provided with one transmitting antenna, but the UE still can realize two-layer beamforming (BF) transmission; and the UE has low calculation load and does not need the feedback expense of the codebook.

Description

Process of signal transmission, control method and system and subscriber equipment and base station

Technical field

The embodiment of the invention relates to communication technical field, relates in particular to a kind of process of signal transmission, control method and system and subscriber equipment and base station.

Background technology

Along with improving constantly that throughput of system is required, two-layer beam shaping (beamforming, hereinafter to be referred as: BF) transmission replaces individual layer BF transmission gradually.

In existing two-layer BF transmission technology, subscriber equipment (User Equipment, hereinafter to be referred as: UE) can measure the average signal-to-noise ratio of down public guide frequency earlier, obtain and this average signal-to-noise ratio corresponding channel quality indication (channel quality indicator by tabling look-up, hereinafter to be referred as: CQI), then this CQI is fed back to the base station.The base station can be adjusted the CQI that receives, thereby obtains the CQI1 of ground floor space transmission.Reciprocity according to the up-downgoing channel, the base station can increase the CQI2 that gain delta is obtained the transmission of second layer space on the basis of CQI1, and the order of modulation and the channel coding rate of two-layer transfer of data are set respectively, and data are transferred to UE in two-layer BF mode in conjunction with channel matrix H according to CQI1 and CQI2.But, when UE only is provided with 1 emission electric wire, can't carry out two-layer BF transmission.In order to solve this technical problem, the method that prior art adopts can be: the base station sends the omni-beam signal vector to UE, and UE can carry out equivalent channel according to this omni-beam signal vector and estimate, obtains equivalent channel matrix H _eUE selects a code book C in its code book set ∏ then _i, according to this code book C _iAnd equivalent channel matrix H _eSignal to noise ratio SINR etc. the two-layer BF transmission of calculation of parameter ₁And SINR ₂, according to SINR ₁And SINR ₂Calculate corresponding throughput T respectively ₁And T ₂Thereby, determine code book C _iCorresponding throughput T=T ₁+ T ₂, UE can be determined at the code book C of maximum throughput correspondence by calculating the throughput of all code books _d, and according to this code book C _dCorresponding signal to noise ratio SINR ₁And SINR ₂Table look-up and determine corresponding C QI; At last, UE is with code book C _dAnd two CQI feed back to the base station, thereby make the base station according to code book C _d, CQI and spatial manipulation vector come transmission signals.

The inventor is in realizing process of the present invention, there are the following problems at least to find prior art: although prior art also can realize two-layer BF transmission when UE only is provided with a transmitting antenna, but UE need select code book through complicated and a large amount of calculating, causes the calculated load of UE bigger; And UE also needs this code book value is fed back to the base station after select determining code book, therefore, increased the feedback overhead of UE.

Summary of the invention

The embodiment of the invention provides a kind of process of signal transmission, control method and system and subscriber equipment and base station, when carrying out two-layer BF transmission to solve prior art, the technical problem that the calculated load of UE and feedback overhead are bigger realizes reducing the calculated load of UE and the technique effect of feedback overhead.

The embodiment of the invention provides a kind of process of signal transmission method, comprising:

Receive the first signal to noise ratio side-play amount that the base station sends;

According to code book and the described first signal to noise ratio side-play amount, obtain the two-layer channel transmitted quality indication (CQI) information in space, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

The embodiment of the invention provides a kind of signal transfer control method, comprising:

Send the first signal to noise ratio side-play amount to subscriber equipment;

Receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Carry out process of signal transmission according to described channel quality indication (CQI) information.

The embodiment of the invention provides a kind of subscriber equipment, comprising:

First receiver module is used to receive the first signal to noise ratio side-play amount that the base station sends;

Acquisition module is used for obtaining the two-layer channel transmitted quality indication (CQI) information in space according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

First sending module is used for described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

The embodiment of the invention provides a kind of base station, comprising:

Second sending module is used for sending the first signal to noise ratio side-play amount to subscriber equipment;

Second receiver module is used to receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Processing module is used for carrying out process of signal transmission according to described channel quality indication (CQI) information.

The embodiment of the invention also provides a kind of signal transmission system, comprises above-mentioned base station.

In the embodiment of the invention, the code book and the first signal to noise ratio side-play amount that UE both can issue by the base station, calculating is obtained the base station and is carried out the required CQI of two-layer BF transmission, also can be according to the code book and the first signal to noise ratio side-play amount of making an appointment with the base station of its storage, calculate and obtain the base station and carry out the required CQI of two-layer BF transmission.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the flow chart of an embodiment of process of signal transmission method of the present invention;

Fig. 2 is the flow chart of another embodiment of process of signal transmission method of the present invention;

Fig. 3 is the flow chart of an embodiment of signal transfer control method of the present invention;

Fig. 4 is the flow chart of the inventive method embodiment;

Fig. 5 is the structural representation of an embodiment of subscriber equipment of the present invention;

Fig. 6 is the structural representation of another embodiment of subscriber equipment of the present invention;

Fig. 7 is the structural representation of the embodiment in base station of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

Fig. 1 is the flow chart of an embodiment of process of signal transmission method of the present invention, and as shown in Figure 1, the method for present embodiment comprises:

The first signal to noise ratio side-play amount that step 101, reception base station send;

UE receives the first signal to noise ratio offset that the base station sends ₁, this first signal to noise ratio offset ₁Be used for the adjustment processing that follow-up UE carries out signal to noise ratio, to proofread and correct the error of signal to noise ratio.

Step 102, according to code book and the described first signal to noise ratio side-play amount, obtain the two-layer channel transmitted quality indication (CQI) information in space, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

For instance, code book C _xCan be that (long term evolution is hereinafter to be referred as LTE) 2 antenna codebooks among the R8 for Long Term Evolution.In the present embodiment, because the diversity ratio between the code book is less, so the base station both can select code book according to antenna configurations, also can preset a fixing code book, then by high-level signaling with this code book C _xSend to UE.The two-layer transmission in space in the present embodiment is in the signal transmission adopts two space transmission channel with transmission signals simultaneously.

For example, if base station configuration horizontal/vertical poliarizing antenna battle array, UE is configuration level/vertical polarized antenna battle array also, and then code book C as follows can be selected in the base station ₀:

$C_0=\frac{1}{\sqrt{2}}\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]$

Under this antenna configurations, space ground floor signal transmits on vertical polarized antenna array element, and space second layer signal transmits in horizonally-polarized array unit.For the UE that has adopted horizontal/vertical poliarizing antenna battle array, horizontally-polarized antenna can receive the horizontal polarization wave beam of base station, and vertical polarized antenna can receive the perpendicular polarization wave beam of base station, and can avoid polarization loss this moment.

If base station configuration+/-45 degree poliarizing antenna battle arrays, and user device configuration is horizontal/vertical poliarizing antenna battle array, then code book C as follows can be selected in the base station ₁Perhaps C ₂:

$C_1=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ 1& -1\end{array}\right],$ $C_2=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ i& -i\end{array}\right]$

Under this antenna configurations, space ground floor signal transmits on+45 degree poliarizing antenna array elements and-45 degree poliarizing antenna array elements simultaneously; Space second layer signal also is like this.For the UE that has adopted horizontal/vertical poliarizing antenna battle array, horizonally polarized receiving antenna can receive the signal from two different polarization wave beams of base station, and the perpendicular polarization reception antenna also can receive the signal from two different polarization wave beams of base station.

UE is according to code book C _xAnd first the signal to noise ratio side-play amount can obtain the CQI of the two-layer transmission in space.This code book can send to UE by the base station, also can be that UE and base station are appointed in advance.Because the difference between each code book on performance is little, therefore, UE and base station are arranged code book in advance neither can influence systematic function, can also save the base station sends channel resource from code book to UE.

In embodiment of process of signal transmission method of the present invention, described in the step 102 according to the described code book and the first signal to noise ratio side-play amount, obtain the two-layer channel transmitted quality indication (CQI) information in space, can comprise:, calculate respectively and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio according to described code book;

Use the described first signal to noise ratio side-play amount described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio are adjusted processing, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

For instance, UE can estimate equivalent channel H according to omni-beam signal vector Y _e:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

UE employing least mean-square error (minimum mean squared error, hereinafter to be referred as: MMSE) Processing Algorithm, according to following formula, calculate in the two-layer transmission in space, the pairing transmission signal to noise ratio of k (k=1,2) layer transmission signals, i.e. space ground floor transmission signal to noise ratio SINR ₁With space second layer transmission signal to noise ratio SINR ₂:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _eC _x, I _MBe the unit matrix of M dimension (M=2), E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.

Then, UE is according to SINR _k, and the first signal to noise ratio offset notified of base station ₁, to space ground floor transmission signal to noise ratio SINR ₁With space second layer transmission signal to noise ratio SINR ₂Adjust processing, obtain adjusted transmission signal to noise ratio: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.

Step 103, described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

UE can feed back to described base station with described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information, is about to CQI1 and CQI2 and feeds back to the base station.The base station can estimate the arrival angle of upward signal, and (Direction of Arrival is hereinafter to be referred as DoA) numerical value θ.If the spacing of same polarization bay is a half wavelength,, can obtain the spatial manipulation vector of 4 array elements so according to DoA numerical value:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\π}\sin \mathrm{\θ}}& e^{i2\mathrm{\π}\sin \mathrm{\θ}}& e^{i3\mathrm{\π}\sin \mathrm{\θ}}\end{array}\right]$

If information symbol to be sent vector is S=[s1, s2], then the base station is according to order of modulation and the code rate of the CQI1 that receives and definite accordingly s1 of CQI2 and s2, and the base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁And V ₂Be respectively the spatial manipulation vector that obtains according to V, V ₁And V ₂Can be the same or different C _xIt is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in the base station.

In process of signal transmission method the foregoing description of the present invention, the code book and the first signal to noise ratio side-play amount that UE both can issue by the base station, calculating is obtained the base station and is carried out the required CQI of two-layer BF transmission, also can be according to the code book and the first signal to noise ratio side-play amount of making an appointment with the base station of its storage, calculate and obtain the base station and carry out the required CQI of two-layer BF transmission.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again this code book to be fed back to the base station, and therefore, the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.

Among another embodiment of process of signal transmission method of the present invention, can also comprise: receive the second signal to noise ratio side-play amount that the base station sends, calculate according to the described second signal to noise ratio side-play amount and obtain space one deck channel transmitted quality indication (CQI) information; Step 103 is described to be fed back to described channel quality indication (CQI) information before the described base station, can also comprise: calculate according to the two-layer channel transmitted quality indication (CQI) information in described space and obtain the throughput of the two-layer transmission in space, and calculate the throughput of obtaining one deck transmission of described space according to described space one deck channel transmitted quality indication (CQI) information; Described described channel quality indication (CQI) information is fed back to described base station, can comprise: when the throughput of the two-layer transmission in described space is big greater than the throughput of space one deck transmission, will feed back to described base station with the throughput corresponding channel quality indication information of the two-layer transmission in described space.When the throughput of the two-layer transmission in described space during, then will feed back to described base station with the throughput corresponding channel quality indication information of described space one deck transmission smaller or equal to the throughput of space one deck transmission.

Further, described calculating according to the described second signal to noise ratio side-play amount obtained space one deck channel transmitted quality indication (CQI) information, comprise: use the described second signal to noise ratio side-play amount signal to noise ratio of described space one deck transmission is adjusted processing, and obtain corresponding space one deck channel transmitted quality indication (CQI) information according to the signal to noise ratio of adjusted space one deck transmission.

Fig. 2 is the flow chart of another embodiment of process of signal transmission method of the present invention, and as shown in Figure 2, the method for present embodiment comprises:

The code book C that step 201, reception base station send _x, the first signal to noise ratio offset ₁And the second signal to noise ratio offset ₂

Wherein, code book C _xCan be 2 antenna codebooks among the LTE R8.In the present embodiment, code book both can be selected according to antenna configurations in the base station, then by high-level signaling with this code book C _xSend to UE; And because the diversity ratio between the code book is less, so the code book C in the step 201 _xAlso can be for realizing agreement between base station and the UE, thus this code book is stored among the UE, so that follow-up use, and issue without base station busy channel resource.

The first signal to noise ratio offset ₁And the second signal to noise ratio offset ₂Be respectively applied for the signal to noise ratio of two-layer transmission in space and the transmission of space one deck is adjusted processing.The two-layer transmission in space in the present embodiment is in signal transmission adopts two space transmission channel with transmission signals simultaneously, and one deck transmission in space is in the signal transmission and only adopts a space transmission channel with transmission signals.Present embodiment also adopts space one deck transmission when adopting the two-layer transmission in space, promptly present embodiment has adopted two kinds of transmission modes.

Step 202, estimate equivalent channel H according to this omni-beam signal vector Y _e

UE estimates equivalent channel H according to omni-beam signal vector Y _eCan for:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

Step 203, according to equivalent channel H _eAnd code book C _xThe transmission signal to noise ratio of the two-layer transmission of computer memory, and obtain the throughput T of the two-layer transmission in space according to the transmission signal to noise ratio of the two-layer transmission in space ₂

The transmission signal to noise ratio of the two-layer transmission in space is space ground floor transmission signal to noise ratio SINR ₁With second layer transmission signal to noise ratio SINR ₂, its calculating can be adopted following formula:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\ρ}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _eC _x, I _MBe the unit matrix of M dimension (M=2),

E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.

Then, UE is according to the SINR that obtains _k, and the first signal to noise ratio offset of base station notice ₁, to space ground floor transmission signal to noise ratio SINR ₁With second layer transmission signal to noise ratio SINR ₂Adjust processing, obtain adjusted transmission signal to noise ratio: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.Then, obtain the throughput T of the two-layer transmission in space (rank=2) according to this ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2 calculating ₂

Step 204, according to receive channel, calculate and to obtain space one deck transmission signal to noise ratio, and obtain the throughput T of space one deck transmission according to space one deck transmission signal to noise ratio ₁

Present embodiment can be established antenna 1 and the antenna 5 that public guide frequency is present in base station side.If UE has 2 reception antennas, the average signal-to-noise ratio of Ce Lianging is so:

${\mathrm{SINR}}_0=\frac{\mathrm{\&rho;}}{4}({\left|{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="H2009100896526E0000031.png,H2009100896526E0000032.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}\right|}^2+{\left|{\mathrm{<figure-callout\; id="15"\; label="h"\; filenames="H2009100896526E0000033.png"\; state="\{\{state\}\}">h</figure-callout>}}_{15}\right|}^2+{\left|h_{21}\right|}^2+{\left|h_{25}\right|}^2)$

Wherein:

E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.h _MnBe channel (m=1～2 between m reception antenna and n the transmitting antenna; N=1～8).UE is according to SINR ₀, and the second signal to noise ratio offset notified of base station ₀Adjust processing, obtain adjusted space one deck transmission signal to noise ratio:

SINR ₀＝SINR ₀+Δ ₀，

UE also can obtain the CQI of space one deck transmission by the mode of tabling look-up, and promptly CQI0 can calculate the throughput T that obtains space one deck transmission (rank=1) according to this CQI0 ₁

Need to prove not have sequencing between step 203 and the step 204.

Step 205, judgement T ₂Whether greater than t ₁If then execution in step 206, otherwise execution in step 207.

Judge T ₂Whether greater than T ₁Process be judgement under current state, whether the transmission performance of the two-layer transmission in space greater than the transmission performance of space one deck transmission, which transmission performance was good during the two-layer transmission in space was transmitted with space one deck, promptly which kind of transmission mode is throughput greatly just use.

Step 206, the CQI of the two-layer transmission in space and corresponding transmission mode are sent to the base station.

CQI1 and CQI2 and rank=2 are sent to the base station, thereby make and can know when the base station gets access to rank=2 that the throughput when the two-layer transmission of front space is bigger, thus can be according to CQI1 and CQI2 and code book C _xCarry out the two-layer transmission in space.

Step 207, CQI and corresponding transmission mode that space one deck is transmitted send to the base station.

CQI0 and rank=1 are sent to the base station, thereby make and to know when the base station gets access to rank=1 that the throughput when front space one deck transmission is bigger, thereby carry out space one deck transmission according to CQI0.

In process of signal transmission method the foregoing description of the present invention, UE is by receiving the code book and the first signal to noise ratio side-play amount that the base station sends, can calculate and obtain the base station and carry out the required CQI of two-layer BF transmission, perhaps according to the code book and the first signal to noise ratio side-play amount of making an appointment with the base station of its storage, calculating is obtained the base station and is carried out the required CQI of two-layer BF transmission, also can obtain the required CQI of space one deck transmission according to receive channel and the calculating of the second signal to noise ratio side-play amount of UE itself, and according to the two-layer throughput of transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and the indication base station transmits with the bigger form of throughput.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.And the base station can transmit in more excellent mode by the transmission mode that UE reports, thereby has improved signal transfer quality.

Fig. 3 is the flow chart of an embodiment of signal transfer control method of the present invention, and as shown in Figure 3, the method for present embodiment comprises:

Step 301, send the first signal to noise ratio side-play amount to subscriber equipment;

The base station can send the first signal to noise ratio offset to UE ₁, this first signal to noise ratio offset ₁Be used for the adjustment processing that follow-up UE carries out signal to noise ratio.

Step 302, receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount;

For instance, the base station can be by high-level signaling with this code book C _xSend to this code book of UE C _xCan be 2 antenna codebooks among the LTE R8.In the present embodiment, this code book can send to UE by the base station, also can be that UE and base station are appointed in advance.Because the difference between each code book on performance is little, therefore, UE and base station are arranged code book in advance neither can influence systematic function, can also save the base station sends channel resource from code book to UE.The two-layer transmission in space in the present embodiment is in the signal transmission adopts two space transmission channel with transmission signals simultaneously.For example, if base station configuration horizontal/vertical poliarizing antenna battle array, UE is configuration level/vertical polarized antenna battle array also, and then code book C as follows can be selected in the base station ₀:

$C_0=\frac{1}{\sqrt{2}}\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]$

Under this antenna configurations, space ground floor signal transmits on vertical polarized antenna array element, and space second layer signal transmits in horizonally-polarized array unit.For the UE that has adopted horizontal/vertical poliarizing antenna battle array, horizontally-polarized antenna can receive the horizontal polarization wave beam of base station, and vertical polarized antenna can receive the perpendicular polarization wave beam of base station, and can avoid polarization loss this moment.

If base station configuration+/-45 degree poliarizing antenna battle arrays, and user device configuration is horizontal/vertical poliarizing antenna battle array, then code book C as follows can be selected in the base station ₁Perhaps C ₂:

$C_1=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ 1& -1\end{array}\right],$ $C_2=\frac{1}{2}\left[\begin{array}{cc}1& 1\\ i& -i\end{array}\right]$

Under this antenna configurations, space ground floor signal transmits on+45 degree poliarizing antenna array elements and-45 degree poliarizing antenna array elements simultaneously; Space second layer signal also is like this.For the UE that has adopted horizontal/vertical poliarizing antenna battle array, horizonally polarized receiving antenna can receive the signal from two different polarization wave beams of base station, and the perpendicular polarization reception antenna also can receive the signal from two different polarization wave beams of base station.

UE is according to code book C _xAnd first the signal to noise ratio side-play amount can obtain the CQI of the two-layer transmission in space.

In embodiment of signal transfer control method of the present invention, the two-layer channel transmitted quality indication (CQI) information in space that the described subscriber equipment of reception described in the step 302 obtains according to described code book and the described first signal to noise ratio side-play amount, can comprise: receive described subscriber equipment and calculate respectively according to described code book and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, use the described first signal to noise ratio side-play amount and described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio are adjusted ground floor channel quality indication (CQI) information and the second layer channel quality indication (CQI) information of handling and obtaining according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio.

For instance, UE can estimate equivalent channel H according to omni-beam signal vector Y _e:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

UE adopts the MMSE Processing Algorithm,, calculates in the two-layer transmission in space the pairing transmission signal to noise ratio of k (k=1,2) layer transmission signals, i.e. space ground floor transmission signal to noise ratio SINR according to following formula ₁With space second layer transmission signal to noise ratio SINR ₂:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\&rho;}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _eC _x, I _MBe the unit matrix of M dimension (M=2), E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.

Then, UE is according to SINR _k, and the first signal to noise ratio offset notified of base station ₁, to space ground floor transmission signal to noise ratio SINR ₁With space second layer transmission signal to noise ratio SINR ₂Adjust processing, obtain adjusted transmission signal to noise ratio: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.

Step 303, carry out process of signal transmission according to described channel quality indication (CQI) information.

UE feeds back to the base station with CQI1 and CQI2.The base station can estimate the DoA numerical value θ of upward signal.If the spacing of same polarization bay is a half wavelength,, can obtain the spatial manipulation vector of 4 array elements so according to DoA numerical value:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\&pi;}\sin \mathrm{\&theta;}}& e^{i2\mathrm{\&pi;}\sin \mathrm{\&theta;}}& e^{i3\mathrm{\&pi;}\sin \mathrm{\&theta;}}\end{array}\right]$

If information symbol to be sent vector is S=[s1, s2], then the base station is according to order of modulation and the code rate of the CQI1 that receives and definite accordingly s1 of CQI2 and s2, and the base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁And V ₂Be respectively the spatial manipulation vector that obtains according to V, V ₁And V ₂Can be the same or different C _xIt is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in the base station.

In signal transfer control method the foregoing description of the present invention, after the base station sent to UE with code book and the first signal to noise ratio side-play amount, UE can calculate and obtain the base station and carry out the required CQI of two-layer BF transmission.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.

Among another embodiment of signal transfer control method of the present invention, can also comprise: send the second signal to noise ratio side-play amount to subscriber equipment, calculate according to the described second signal to noise ratio side-play amount for described subscriber equipment and obtain space one deck channel transmitted quality indication (CQI) information.The two-layer channel transmitted quality indication (CQI) information in space that the described subscriber equipment of reception described in the step 302 obtains according to described code book and the first signal to noise ratio side-play amount, can comprise: when receiving described subscriber equipment calculates the two-layer transmission in space of obtaining according to the two-layer channel transmitted quality indication (CQI) information in described space throughput and calculating the throughput of space one deck transmission of obtaining according to described space one deck channel transmitted quality indication (CQI) information greater than described subscriber equipment, the two-layer channel transmitted quality indication (CQI) information in space of described subscriber equipment feedback.When the throughput of the two-layer transmission in described space during, receive space one deck channel transmitted quality indication (CQI) information that described subscriber equipment sends smaller or equal to the throughput of described space one deck transmission.

In another embodiment of signal transfer control method of the present invention, can also comprise: the channel vector that obtains the up transmitting antenna of subscriber equipment, describedly carry out process of signal transmission, comprising: carry out process of signal transmission according to described channel vector, described channel quality indication (CQI) information according to described channel quality indication (CQI) information.

Fig. 4 is the flow chart of the inventive method embodiment, and as shown in Figure 4, the method for present embodiment can comprise:

Step 401, base station send omni-beam signal vector Y, the first signal to noise ratio offset to UE ₁And the second signal to noise ratio offset ₂

Omni-beam signal vector Y is:

$Y=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]S+n$

The first signal to noise ratio offset ₁And the second signal to noise ratio offset ₂Be respectively applied for the signal to noise ratio of two-layer transmission in space and the transmission of space one deck is adjusted processing.The two-layer transmission in space in the present embodiment is in signal transmission adopts two space transmission channel with transmission signals simultaneously, and one deck transmission in space is in the signal transmission and only adopts a space transmission channel with transmission signals.Present embodiment also adopts space one deck transmission when adopting the two-layer transmission in space, promptly present embodiment has adopted two kinds of transmission modes.

Step 402, UE estimate equivalent channel H according to this omni-beam signal vector Y _e

UE estimates equivalent channel H according to omni-beam signal vector Y _eCan for:

$H_e=H\left[\begin{array}{cc}W& 0\\ 0& W\end{array}\right]$

Step 403, UE are according to equivalent channel H _eAnd code book C _xThe transmission signal to noise ratio of the two-layer transmission of computer memory, and obtain the throughput T of the two-layer transmission in space according to the transmission signal to noise ratio of the two-layer transmission in space ₂

Wherein, code book C _xCan be 2 antenna codebooks among the LTE R8.This code book can be that UE and base station are appointed in advance.Because the difference between each code book on performance is little, therefore, UE and base station are arranged code book in advance neither can influence systematic function, can also save the base station sends channel resource from code book to UE.

The transmission signal to noise ratio of the two-layer transmission in space is space ground floor transmission signal to noise ratio SINR ₁With space second layer transmission signal to noise ratio SINR ₂, its calculating can be adopted following formula:

${\mathrm{SINR}}_k=\frac{1}{{\left({(\frac{\mathrm{\&rho;}}{M}{H_0}^H{H}_0+I_M)}^{-1}\right)}_{k,k}}-1$

Wherein, H _o=H _eC _x, I _MBe the unit matrix of M dimension (M=2), E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.

Then, UE is according to the SINR that obtains _k, and the first signal to noise ratio offset of base station notice ₁, to space ground floor transmission signal to noise ratio SINR ₁With second layer transmission signal to noise ratio SINR ₂Adjust processing, obtain the transmission signal to noise ratio of the two-layer transmission in adjusted space: SINR ' _k=SINR _k+ Δ ₁, UE can obtain the CQI of the two-layer transmission in space by the mode of tabling look-up, i.e. ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2.Then, obtain the throughput T of the two-layer transmission in space (rank=2) according to this ground floor channel quality indication (CQI) information CQI1 and second layer channel quality indication (CQI) information CQI2 calculating ₂

Step 404, UE calculate and obtain space one deck transmission signal to noise ratio, and obtain the throughput T of space one deck transmission according to space one deck transmission signal to noise ratio according to receive channel ₁

Present embodiment can be established antenna 1 and the antenna 5 that public guide frequency is present in base station side.If UE has 2 reception antennas, the average signal-to-noise ratio of Ce Lianging is so:

${\mathrm{SINR}}_0=\frac{\mathrm{\&rho;}}{4}({\left|{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="H2009100896526E0000031.png,H2009100896526E0000032.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}\right|}^2+{\left|{\mathrm{<figure-callout\; id="15"\; label="h"\; filenames="H2009100896526E0000033.png"\; state="\{\{state\}\}">h</figure-callout>}}_{15}\right|}^2+{\left|h_{21}\right|}^2+{\left|h_{25}\right|}^2)$

Wherein:

E _sBe the total transmitting power in base station, N ₀It is noise power spectral density.h _MnBe channel (m=1～2 between m reception antenna and n the transmitting antenna; N=1～8).UE is according to SINR ₀, and the second signal to noise ratio offset notified of base station ₀Adjust processing, obtain adjusted space one deck transmission signal to noise ratio:

SINR ₀＝SINR ₀+Δ ₀，

UE also can obtain the CQI of space one deck transmission by the mode of tabling look-up, and promptly CQI0 can calculate the throughput T that obtains space one deck transmission (rank=1) according to this CQI0 ₁

Need to prove not have sequencing between step 403 and the step 404.

Step 405, UE judge T ₁Whether greater than T ₁If then execution in step 406, otherwise execution in step 407.

UE judges T ₂Whether greater than T ₁Process be judgement under current state, whether the transmission performance of the two-layer transmission in space greater than the transmission performance of space one deck transmission, which transmission performance was good during the two-layer transmission in space was transmitted with space one deck, promptly which kind of transmission mode is throughput greatly just use.

Step 406, the CQI of the two-layer transmission in space and corresponding transmission mode are sent to the base station, and execution in step 408.

CQI1 and CQI2 and rank=2 are sent to the base station, thereby make and can know when the base station gets access to rank=2 that the throughput when the two-layer transmission of front space is bigger, thus can be according to CQI1 and CQI2 and code book C _xCarry out the two-layer transmission in space.

Step 407, CQI and corresponding transmission mode that space one deck is transmitted send to the base station, and execution in step 409.

CQI0 and rank=1 are sent to the base station, thereby make and can know when the base station gets access to rank=1 that the throughput when front space one deck transmission is bigger, thereby according to CQI0 and code book C _xCarry out space one deck transmission.

Step 408, base station are according to CQI1, CQI2 and the rank two-layer transmission of row space of going forward side by side of determining to transmit.

The base station can be known after obtaining rank=2 the two-layer BF transmission mode of employing is transmitted.Can determine the order of modulation and the code rate of two layer signal correspondences respectively according to CQI1 CQI2.When specific implementation, the base station can estimate the DoA numerical value θ of upward signal.If the spacing of same polarization bay is a half wavelength,, can obtain the spatial manipulation vector of 4 array elements so according to DoA numerical value:

$V=\frac{1}{2}\left[\begin{array}{cccc}1& e^{\mathrm{i\&pi;}\sin \mathrm{\&theta;}}& e^{i2\mathrm{\&pi;}\sin \mathrm{\&theta;}}& e^{i3\mathrm{\&pi;}\sin \mathrm{\&theta;}}\end{array}\right]$

If information symbol to be sent vector is S=[s1, s2], then the base station is according to order of modulation and the code rate of the CQI1 that receives and definite accordingly s1 of CQI2 and s2, and the base station can obtain according to following formula and transmit:

$\left[\begin{array}{cc}{V}_1& 0\\ 0& V_2\end{array}\right]C_{d}S$

Wherein, V ₁And V ₂Be respectively the spatial manipulation vector that obtains according to V, V ₁And V ₂Can be the same or different C _xIt is the code book that aforementioned base station sends to UE.

So far, two-layer BF transmission can be carried out to sent signal in the base station.

When rank=2, definite transmit also can for:

$\left[\begin{array}{cc}{\tilde{h}}_{1~4}& 0\\ 0& {\tilde{h}}_{5~8}\end{array}\right]C_{x}S$

H=[h ₁h ₂Λ h ₈] ^TIt is a channel vector that fixing up transmitting antenna obtains from UE.Wherein, C _xBe the code book that eNB selects according to antenna configurations, S=[s1, s2] ^TBe the information symbol vector that sends, With

Be respectively the moulding vector of two poliarizing antenna battle arrays, and,

$h_{1~4}^{\&prime;}=\frac{{\left(h_{1~4}\right)}^H}{h_1}$ ${\tilde{h}}_{1~4}=\frac{{\left(h_{1~4}^{\&prime;}\right)}^H}{\left|\right|h_{1~4}^{\&prime;}\left|\right|}$ $h_{5~8}^{\&prime;}=\frac{{\left(h_{5~8}\right)}^H}{h_5}$ ${\tilde{h}}_{5~8}=\frac{{\left(h_{5~8}^{\&prime;}\right)}^H}{\left|\right|h_{5~8}^{\&prime;}\left|\right|}.$

Step 409, according to CQI0 and the rank row space one deck transmission of going forward side by side of determining to transmit.

This transmits and can be VS

Wherein, s is the information symbol vector, and spatial manipulation vector V is:

Wherein, h=[h ₁h ₂Λ h ₈] ^TIt is a channel vector that fixing up transmitting antenna obtains from UE.

So far, space one deck transmission can be carried out to sent signal in the base station.

In the foregoing description, UE is by the code book of appointing in advance with the base station of himself storage, can calculate and obtain the base station and carry out the required CQI of two-layer BF transmission, also can calculate and obtain the required CQI of space one deck transmission according to the receive channel of UE itself, and according to the two-layer throughput of transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and the indication base station transmits with the bigger form of throughput.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the present embodiment, the employed code book of UE is appointed in advance with the base station, therefore, does not need base station busy channel resource to issue, thereby has saved channel resource when reducing the UE computation complexity.And the base station can transmit in more excellent mode by the transmission mode that UE reports, thereby has improved signal transfer quality.

Fig. 5 is the structural representation of an embodiment of subscriber equipment of the present invention, and as shown in Figure 5, the subscriber equipment of present embodiment comprises: first receiver module 11, acquisition module 12 and first sending module 13.Wherein, first receiver module 11 is used to receive the first signal to noise ratio side-play amount that the base station sends; Acquisition module 12 is used for obtaining the two-layer channel transmitted quality indication (CQI) information in space according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement; First sending module 13 is used for described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

The subscriber equipment of present embodiment is identical with the principle of process of signal transmission method embodiment shown in Figure 1, repeats no more.

The code book and the first signal to noise ratio side-play amount that the UE of present embodiment both can issue by the base station, calculating is obtained the base station and is carried out the required CQI of two-layer BF transmission, also can be according to the code book and the first signal to noise ratio side-play amount of making an appointment with the base station of its storage, calculate and obtain the base station and carry out the required CQI of two-layer BF transmission.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.

Fig. 6 is the structural representation of another embodiment of subscriber equipment of the present invention, and as shown in Figure 6, the subscriber equipment of present embodiment can comprise: first receiver module 11, acquisition module 12 and first sending module 13.Wherein, first receiver module 11 is used to receive the first signal to noise ratio side-play amount that the base station sends; Acquisition module 12 is used for obtaining the two-layer channel transmitted quality indication (CQI) information in space according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement; First sending module 13 is used for described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

Further, acquisition module 12 can comprise: first acquiring unit 121 and second acquisition unit 122.Wherein, first acquiring unit 121 is used for according to described code book, calculates respectively and obtains space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio; Second acquisition unit 122 is used to use the described first signal to noise ratio side-play amount described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio is adjusted processing, and obtains corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio; First sending module 13 is used for described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information are fed back to described base station.

Further, described first receiver module 11 also is used to receive the second signal to noise ratio side-play amount that described base station sends, described first acquiring unit 121 also is used for obtaining space one deck channel transmitted quality indication (CQI) information according to described second signal to noise ratio side-play amount calculating, obtain the throughput of the two-layer transmission in space according to the two-layer channel transmitted quality indication (CQI) information calculating in described space, and calculate the throughput obtain one deck transmission of described space according to described space one deck channel transmitted quality indication (CQI) information, described first sending module 13 is used for will feeding back to described base station with the throughput corresponding channel quality indication information of the two-layer transmission in described space when the throughput of the two-layer transmission in described space is big greater than the throughput of space one deck transmission.First sending module 13 also is used for will feeding back to described base station with the throughput corresponding channel quality indication information of described space one deck transmission when the throughput of the two-layer transmission in described space during smaller or equal to the throughput of space one deck transmission.

The principle of the subscriber equipment of present embodiment and process of signal transmission method of the present invention shown in Figure 2 and method embodiment shown in Figure 4 is identical, repeats no more.

The UE of present embodiment is by receiving the code book and the first signal to noise ratio side-play amount that the base station sends, can calculate and obtain the base station and carry out the required CQI of two-layer BF transmission, perhaps according to the code book and the first signal to noise ratio side-play amount of making an appointment with the base station of its storage, calculating is obtained the base station and is carried out the required CQI of two-layer BF transmission, also can obtain the required CQI of space one deck transmission according to receive channel and the calculating of the second signal to noise ratio side-play amount of UE itself, and according to the two-layer throughput of transmitting the two-layer transmission of CQI computer memory in space, according to the throughput of space one deck transmission CQI computer memory one deck transmission, and the indication base station transmits with the bigger form of throughput.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.And the base station can transmit in more excellent mode by the transmission mode that UE reports, thereby has improved signal transfer quality.

Fig. 7 is the structural representation of the embodiment in base station of the present invention, and as shown in Figure 7, the base station of present embodiment comprises: second sending module 14, second receiver module 15 and processing module 16.Wherein, second sending module 14 is used for sending the first signal to noise ratio side-play amount to subscriber equipment; Second receiver module 15 is used to receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement; Processing module 16 is used for carrying out process of signal transmission according to described channel quality indication (CQI) information.

The base station of present embodiment is identical with the principle of signal transfer control method embodiment of the present invention shown in Figure 3, repeats no more.

After the base station of present embodiment sent to UE with code book, UE can calculate and obtain the base station and carry out the required CQI of two-layer BF transmission.Because in this process, the base station needn't know that the channel matrix of UE calculates corresponding C QI, calculates the operation of obtaining CQI and is finished by UE, even UE only is provided with a transmitting antenna, also can calculate the CQI that obtains the two-layer transmission in space, thereby carries out two-layer BF transmission.And in the embodiment of the invention, UE need not to carry out the calculating selection code book of large amount of complex, thereby has reduced the calculated load of UE.In addition, UE also need not again therefore this code book to be fed back to the base station, and the embodiment of the invention has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.

Embodiment of signal transmission system of the present invention can comprise above-mentioned base station embodiment.In the signal transmission system of the present invention, UE that can receive code book or obtain its storage from base station side with the code book base station agreement, and need not calculating that UE carries out large amount of complex voluntarily selecting this code book, thereby reduced the calculated load of UE.In addition, UE need not again this code book to be fed back to the base station, and therefore, present embodiment has also reduced the feedback overhead of UE, has saved channel resource.That obtain its storage for UE and this mode of the code book base station agreement have further been omitted the base station and have been issued the step of code book to UE, thereby not reducing under the prerequisite of systematic function, further saved channel resource.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the above-mentioned method of each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.It should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not limit it, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solution of the present invention.

Claims (18)

1. a process of signal transmission method is characterized in that, comprising:

Receive the first signal to noise ratio side-play amount that the base station sends;

According to code book and the described first signal to noise ratio side-play amount, obtain the two-layer channel transmitted quality indication (CQI) information in space, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

2. process of signal transmission method according to claim 1 is characterized in that, describedly obtains the two-layer channel transmitted quality indication (CQI) information in space according to code book and the described first signal to noise ratio side-play amount, comprising:

According to described code book, calculate respectively and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Use the described first signal to noise ratio side-play amount described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio are adjusted processing, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Described described channel quality indication (CQI) information is fed back to described base station, comprising:

Described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information are fed back to described base station.

3. process of signal transmission method according to claim 1 is characterized in that, also comprises: receive the second signal to noise ratio side-play amount that the base station sends, calculate according to the described second signal to noise ratio side-play amount and obtain space one deck channel transmitted quality indication (CQI) information;

Described described channel quality indication (CQI) information is fed back to before the described base station, also comprises:

Obtain the throughput of the two-layer transmission in space according to the two-layer channel transmitted quality indication (CQI) information calculating in described space, and calculate the throughput of obtaining one deck transmission of described space according to described space one deck channel transmitted quality indication (CQI) information;

Described described channel quality indication (CQI) information is fed back to described base station, comprising:

When the throughput of the two-layer transmission in described space during, will feed back to described base station with the throughput corresponding channel quality indication information of the two-layer transmission in described space greater than the throughput of space one deck transmission.

4. process of signal transmission method according to claim 3 is characterized in that,

When the throughput of the two-layer transmission in described space during, then will feed back to described base station with the throughput corresponding channel quality indication information of described space one deck transmission smaller or equal to the throughput of space one deck transmission.

5. according to claim 3 or 4 described process of signal transmission methods, it is characterized in that described calculating according to the described second signal to noise ratio side-play amount obtained space one deck channel transmitted quality indication (CQI) information, comprising:

Use the described second signal to noise ratio side-play amount signal to noise ratio of space one deck transmission is adjusted processing, and obtain corresponding space one deck channel transmitted quality indication (CQI) information according to the signal to noise ratio of adjusted space one deck transmission.

6. a signal transfer control method is characterized in that, comprising:

Send the first signal to noise ratio side-play amount to subscriber equipment;

Receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Carry out process of signal transmission according to described channel quality indication (CQI) information.

7. signal transfer control method according to claim 6 is characterized in that, the two-layer channel transmitted quality indication (CQI) information in space that the described subscriber equipment of described reception obtains according to described code book and the described first signal to noise ratio side-play amount comprises:

Receive described subscriber equipment and calculate respectively according to described code book and obtain space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio, use the described first signal to noise ratio side-play amount and described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio are adjusted ground floor channel quality indication (CQI) information and the second layer channel quality indication (CQI) information of handling and obtaining according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio.

8. signal transfer control method according to claim 7, it is characterized in that, also comprise: send the second signal to noise ratio side-play amount to subscriber equipment, calculate according to the described second signal to noise ratio side-play amount for described subscriber equipment and obtain space one deck channel transmitted quality indication (CQI) information.

9. signal transfer control method according to claim 8, it is characterized in that, the two-layer channel transmitted quality indication (CQI) information in space that the described subscriber equipment of described reception obtains according to described code book and the first signal to noise ratio side-play amount, comprise: when receiving described subscriber equipment calculates the two-layer transmission in space of obtaining according to the two-layer channel transmitted quality indication (CQI) information in described space throughput and calculating the throughput of space one deck transmission of obtaining according to described space one deck channel transmitted quality indication (CQI) information greater than described subscriber equipment, the two-layer channel transmitted quality indication (CQI) information in space of described subscriber equipment feedback.

10. signal transfer control method according to claim 9, it is characterized in that, when the throughput of the two-layer transmission in described space during, receive space one deck channel transmitted quality indication (CQI) information that described subscriber equipment sends smaller or equal to the throughput of described space one deck transmission.

11. according to the described signal transfer control method of arbitrary claim in the claim 6～10, it is characterized in that, also comprise: the channel vector that obtains the up transmitting antenna of subscriber equipment, describedly carry out process of signal transmission, comprising: carry out process of signal transmission according to described channel vector, described channel quality indication (CQI) information according to described channel quality indication (CQI) information.

12. a subscriber equipment is characterized in that, comprising:

First receiver module is used to receive the first signal to noise ratio side-play amount that the base station sends;

Acquisition module is used for obtaining the two-layer channel transmitted quality indication (CQI) information in space according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

First sending module is used for described channel quality indication (CQI) information is fed back to described base station, for carrying out process of signal transmission according to described channel quality indication (CQI) information in described base station.

13. subscriber equipment according to claim 12 is characterized in that, described acquisition module comprises:

First acquiring unit is used for according to described code book, calculates respectively and obtains space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Second acquisition unit, be used to use the described first signal to noise ratio side-play amount described space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio are adjusted processing, and obtain corresponding ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information according to adjusted space ground floor transmission signal to noise ratio and space second layer transmission signal to noise ratio;

Described first sending module is used for described ground floor channel quality indication (CQI) information and second layer channel quality indication (CQI) information are fed back to described base station.

14. subscriber equipment according to claim 13 is characterized in that, described first receiver module also is used to receive the second signal to noise ratio side-play amount that described base station sends,

Described first acquiring unit also is used for obtaining space one deck channel transmitted quality indication (CQI) information according to described second signal to noise ratio side-play amount calculating, obtain the throughput of the two-layer transmission in space according to the two-layer channel transmitted quality indication (CQI) information calculating in described space, and calculate the throughput obtain one deck transmission of described space according to described space one deck channel transmitted quality indication (CQI) information

Described first sending module is used for will feeding back to described base station with the throughput corresponding channel quality indication information of the two-layer transmission in described space when the throughput of the two-layer transmission in described space is big greater than the throughput of space one deck transmission.

15. subscriber equipment according to claim 14, it is characterized in that, described first sending module also is used for will feeding back to described base station with the throughput corresponding channel quality indication information of described space one deck transmission when the throughput of the two-layer transmission in described space during smaller or equal to the throughput of space one deck transmission.

16. a base station is characterized in that, comprising:

Second sending module is used for sending the first signal to noise ratio side-play amount to subscriber equipment;

Second receiver module is used to receive the two-layer channel transmitted quality indication (CQI) information in space that described subscriber equipment obtains according to code book and the described first signal to noise ratio side-play amount, described code book comprise code book that the base station issues or in advance with the code book of base station agreement;

Processing module is used for carrying out process of signal transmission according to described channel quality indication (CQI) information.

17. base station according to claim 16, it is characterized in that, described second sending module also is used for sending the second signal to noise ratio side-play amount to subscriber equipment, calculates according to the described second signal to noise ratio side-play amount for described subscriber equipment and obtains space one deck channel transmitted quality indication (CQI) information.

18. a signal transmission system is characterized in that, comprises claim 16 or 17 described base stations.

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