CN102036393B - Method and equipment for determining multi-cell channel information - Google Patents

Abstract

The embodiment of the invention discloses a method and equipment for determining multi-cell channel information. Multi-cell channel quality information fed back by a terminal, channel state information between each cell and the terminal and interference information of each cell to the resource information distributed by the terminal are utilized in a base station, and then user scheduling, interference coordination and modulation and coding mode selection are performed so as to improve the throughput and processing efficiency of multi-cell combined processing.

Description

Definite method and apparatus of multi-cell channel information

Technical field

The present invention relates to communication technical field, particularly a kind of definite method and apparatus of multi-cell channel information.

Background technology

At the LTE-Advanced of 3GPP (Long Term Evolution Advanced, senior Long Term Evolution) in system, can adopt CoMP (Co-ordinated Multi-Point Transmission, multi-point cooperative transmission) technology to improve the service quality of Cell Edge User.

Multi-point cooperative transmission technology, by combined dispatching or the cooperative transmission of multiple communities of separating on geographical position, improves user's received signal quality, reduces the interference of minizone, thereby effectively improves power system capacity and edge customer spectrum efficiency.

Multi-point cooperative transmission technical scheme is mainly divided into two classes: combined dispatching and combine transmission.

Combined dispatching is by the coordination of the time between community, frequency and space resources, for different UE (User Equipment, user terminal) distributes mutually orthogonal resource, avoids interference each other.The interference of minizone is the principal element of restriction cell edge UE performance, and therefore combined dispatching can reduce the interference of minizone, thereby improves the performance of cell edge UE.

As shown in Figure 1, for the schematic diagram of a kind of application scenarios of combined dispatching technology in prior art, by the combined dispatching of San Ge community, three UE that may phase mutual interference have dispatched in mutually orthogonal resource, have effectively avoided the interference between community.

Only have Yi Ge community different to UE transmission data from combined dispatching scheme, in associating delivery plan, have multiple communities to send data to UE simultaneously, receive signal to strengthen UE.

As shown in Figure 2, be the schematic diagram of the application scenarios of a kind of associated transmission technology in prior art, San Ge community sends data to a UE in identical resource, and UE receives the signal of multiple communities simultaneously.

On the one hand, can promote from the useful signal stack of multiple communities the signal quality that UE receives.On the other hand, reduce the interference that UE is subject to, thereby improved systematic function.

In LTE system, UE estimates the channel information of base station to UE according to the public guide frequency port of Serving cell, and calculate channel quality indication (CQI) information (CQI) and feed back to base station, and the CQI index that may also have pre-coding matrix (PMI) and the number of data streams (RI) together fed back.

CQI feedback makes that base station can be dispatched, resource is distributed and the operation such as MCS selections, the raising availability of frequency spectrum.

LTE-A system, for supporting multi-point cooperative transmission, has further strengthened the transmission of channel information.UE estimates the channel information of each community to UE according to the public guide frequency of measuring set of cells (Measurement Set) interior community transmission.Subsequently, UE directly feeds back to base station by channel information after scalar quantization or vector quantization.Pre-coding matrix calculating is carried out according to the channel information of UE feedback in base station, multi-user's pairing, the operations such as MCS selection.

For TDD system, the SRS signal that base station can send according to UE obtains uplink channel information, and utilizes the reciprocity of upper and lower property channel to obtain descending channel information.

In the process that realizes the embodiment of the present invention, applicant finds that prior art at least exists following problem:

In practical operation, the interference that uplink downlink is subject to is generally different, base station cannot be predicted the interference that UE is subject to accurately, moreover, the employing of the schemes such as combined dispatching, the interference level of phase cooperation cell is changed, and UE can not dope the variation of interference level in the time carrying out feedback of channel information.

Based on above reason, only according to the channel information of UE feedback or the channel information being obtained by SRS, base station can accurately not selected MCS and carry out frequency domain dispatching for UE.

Summary of the invention

The embodiment of the present invention provides a kind of definite method and apparatus of multi-cell channel information, the resource information that makes base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out user's scheduling accordingly, resource distribute and MCS select.

For achieving the above object, the embodiment of the present invention provides a kind of definite method of multi-cell channel information on the one hand, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in described multiple community, Yi Ge community is terminal, other communities are the cooperation cell of described terminal, corresponding base station, described each community, for described terminal provides cooperation transmission service, comprising:

The base station of described Serving cell receives the channel quality indicator CQI information of described each community of described terminal transmission;

The base station of described Serving cell obtains the channel condition information of described each community to described terminal;

The base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell;

The base station of the base station of described the Serving cell channel condition information to described terminal, described Serving cell according to the CQI information of described each community, described each community obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, determines Signal Interference and Noise Ratio SINR;

Wherein, the base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, is specially:

What the base station of described Serving cell obtained the scheduling of described cooperation cell dispatches with described Serving cell the precoding information that resource that the resource of described terminal is identical is used.

On the other hand, the embodiment of the present invention also provides a kind of base station, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in described multiple community, Yi Ge community is terminal, other communities are the cooperation cell of described terminal, corresponding base station, described each community provides cooperation transmission service for described terminal, and corresponding described Serving cell, described base station, comprising:

Receiver module, for receiving the CQI information of described each community that described terminal sends;

Acquisition module, for obtaining the channel condition information of described each community to described terminal, and the scheduling of described cooperation cell is dispatched the interfere information of the resource of described terminal to described Serving cell;

Determination module, obtain the scheduling of described cooperation cell for the base station of the channel condition information to described terminal, described Serving cell according to the CQI information of described each community, described each community the interfere information of the resource of described terminal is dispatched in described Serving cell, determine Signal Interference and Noise Ratio SINR;

Processing module, for according to the determined SINR of described determination module, determines the mode that sends downlink data to described terminal;

Wherein, the base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, is specially:

What the base station of described Serving cell obtained the scheduling of described cooperation cell dispatches with described Serving cell the precoding information that resource that the resource of described terminal is identical is used.

Compared with prior art, the embodiment of the present invention has the following advantages:

By the technical scheme of the application embodiment of the present invention, the resource information that makes base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out accordingly user's scheduling, resource distribution and MCS and select, thereby, improve throughput and the treatment effeciency of multi-plot joint processing.

brief description of the drawings

Fig. 1 is the schematic diagram of a kind of application scenarios of combined dispatching technology in prior art;

Fig. 2 is the schematic diagram of a kind of application scenarios of associated transmission technology in prior art;

Fig. 3 is the schematic flow sheet of definite method of a kind of multi-cell channel information of embodiment of the present invention proposition;

Fig. 4 is the schematic flow sheet of definite method of a kind of multi-cell channel information under the concrete application scenarios that proposes of the embodiment of the present invention;

Fig. 5 is the structural representation of a kind of base station of embodiment of the present invention proposition;

Fig. 6 is the structural representation of a kind of terminal of embodiment of the present invention proposition.

embodiment

As stated in the Background Art, existing technical scheme is only according to the channel information of UE feedback or the channel information being obtained by SRS, and base station can accurately not selected MCS and carry out frequency domain dispatching for UE.

For the problems referred to above, the resource information that can make base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out user's scheduling accordingly, resource distribute and MCS select.

Based on above-mentioned technical thought, the embodiment of the present invention has proposed a kind of definite method of multi-cell channel information, be applied in the mobile communication system that comprises multiple communities, the Serving cell that in multiple communities, Yi Ge community is terminal, other communities are the cooperation cell of terminal, and corresponding base station, each community provides combined dispatching service for terminal.

As shown in Figure 3, the schematic flow sheet of definite method of a kind of multi-cell channel information proposing for the embodiment of the present invention, specifically comprises the following steps:

The base station receiving terminal of step S301, Serving cell sends the channel quality indicator CQI information of Ge community.

It should be noted that, send the CQI information of Ge community at the base station of Serving cell receiving terminal before, also comprise following handling process:

(1) corresponding base station, each community sends respectively CRS and/or CSI-RS.

(2) terminal sends according to the each base station receiving CRS and/or CSI-RS, calculate the corresponding CQI information in each community, and concrete computing formula is as follows:

${\mathrm{CQI}}_i=\frac{\stackrel{\‾}{P_i}}{N_0+I_0}$

Wherein, P _ifor terminal receives the received power of the signal of each community,

N ₀for the reception noise of terminal,

I ₀other disturbing factors outside Wei Ge community.

In concrete application scenarios, above-mentioned terminal receives the mean receiving power P of the signal of each community _i, specifically calculate by following two kinds of modes:

Mode one:

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}\left|\right|}^2,i=\mathrm{1,2}...$

Wherein, H _{i, k}it is the channel matrix to terminal on k the subcarrier of i cooperation cell in Measurement bandwidth.

Mode two:

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}(m,n)\left|\right|}^2,i=\mathrm{1,2}...$

Wherein, H _{i, k}the channel matrix to terminal on k the subcarrier of i cooperation cell in Measurement bandwidth, H _{i, k}(m, n) is the channel coefficients of n transmit antennas to m root reception antenna.

The computer capacity that it is pointed out that the mean receiving power of above-mentioned two kinds of modes can be whole bandwidth or predetermined one section of frequency band.

(3) terminal sends the CQI information of each community to the base station of Serving cell.

The base station of step S302, Serving cell obtains the channel condition information of each community to terminal.

Wherein, the base station of Serving cell obtains the channel information of terminal, specifically comprises following two kinds of modes:

The base station receiving terminal of mode one, Serving cell sends the downlink channel condition information between corresponding base station, Ge community and terminal.

The SRS signal that the base station receiving terminal of mode two, each community sends, and according to the up channel state information between base station corresponding to SRS signal acquisition terminal Yu Ge community, and obtain the downlink channel condition information between corresponding base station, each community and terminal according to channel reciprocity.

Wherein, the base station of Serving cell obtains each community to before the channel condition information of terminal, also comprises:

Be the CRS that sent according to each base station of receiving by terminal and/or CSI-RS while calculating when the base station of Serving cell obtains Ge community to the channel condition information of terminal, terminal is normalized according to the downlink channel condition information between corresponding base station, following formula Dui Ge community and terminal:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _{i, k}being described terminal estimates the channel matrix to described terminal on k the subcarrier in Measurement bandwidth of i the cooperation cell obtaining according to CRS and/or CSI-RS,

P _ifor described terminal is calculating the mean receiving power of using when CQI;

Or,

The SRS signal that the base station of Dang Ge community sends according to the terminal receiving, while determining the downlink channel condition information between corresponding base station, each community and terminal, base station corresponding to each community is normalized according to the downlink channel condition information between corresponding base station, following formula Dui Ge community and terminal:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _{i, k}on k the subcarrier in Measurement bandwidth that the SRS signal that to be i cooperation cell send according to described terminal obtains, arrive the channel matrix of described terminal,

P _ifor the mean receiving power of the base station of described each community, concrete algorithm and terminal receive the received power P of the signal of each community _iaccount form identical, at this repeated description no longer.

The base station of step S303, Serving cell obtains cooperation cell dispatches the interfere information of the resource to Serving cell dispatch terminal.

It is the precoding information that the identical resource of the resource with Serving cell dispatch terminal of acquisition cooperation cell, the base station scheduling of Serving cell is used.

The base station of the base station of step S304, the Serving cell channel condition information to terminal, Serving cell according to the CQI information of each community, each community obtains cooperation cell dispatches the interfere information of the resource to Serving cell dispatch terminal, determines SINR.

In concrete application scenarios, concrete account form is to calculate by following formula:

$\mathrm{SINR}=\frac{{\stackrel{\‾}{P}}_1\×{\left|\right|{\stackrel{\‾}{H}}_{1,k}{w}_1\left|\right|}^2}{\underset{i=2}{\overset{N}{\mathrm{\Σ}}}{\stackrel{\‾}{P}}_i\×{\left|\right|{\stackrel{\‾}{H}}_{i,k}{w}_i\left|\right|}^2+I_0+N_0}=\frac{{\mathrm{CQI}}_1\×{\left|\right|{\stackrel{\‾}{H}}_{1,k}{w}_1\left|\right|}^2}{1+\underset{i=2}{\overset{N}{\mathrm{\Σ}}}{\mathrm{CQI}}_i\×{\left|\right|{\stackrel{\‾}{H}}_{i,k}{w}_i\left|\right|}^2}$

Wherein, H _{i, k}descending normalization channel condition information between corresponding base station, Shi Ge community and terminal,

W ₁descending the used pre-coding matrix information that base station corresponding to Serving cell determined,

W _ithe precoding information that the identical resource of the resource with Serving cell dispatch terminal of cooperation cell scheduling is used,

CQI ₁the corresponding CQI information in Serving cell,

CQI _ithe corresponding CQI information in cooperation cell.

It needs to be noted; above-mentioned various formula are the preferred exemplary that the embodiment of the present invention is selected for the explanation of technical scheme; based on the technology of the present invention thought, and formula and the parameter that can reach constructed effect belong to protection scope of the present invention equally.

The base station of step S305, Serving cell is according to SINR, and really directional terminals sends the mode of downlink data.

In concrete application scenarios, the base station that the specific implementation content of this step is Serving cell is according to SINR, and really directional terminals sends modulation coding mode MCS and the frequency domain resource of downlink data.

Compared with prior art, the embodiment of the present invention has the following advantages:

By the technical scheme of the application embodiment of the present invention, the resource information that makes base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out accordingly user's scheduling, resource distribution and MCS and select, thereby, improve throughput and the treatment effeciency of multi-plot joint processing.

Below, in conjunction with concrete application scenarios, the technical scheme that the embodiment of the present invention is proposed describes.

As shown in Figure 4, for the embodiment of the present invention has proposed the schematic flow sheet of definite method of a kind of multi-cell channel information under concrete application scenarios, specifically comprise the following steps:

Multiple cell base stations in the set of step S401, cooperation cell send CRS or and CSI-RS.

The reference signal that step S402, UE send based on multiple cell base stations, measuring respectively the received power of multiple communities and the ratio of noise jamming is CQI information.

Taking 2 communities as example, what its CQI information represented thes contents are as follows:

The CQI information of Serving cell: ${\mathrm{CQI}}_1=\frac{\stackrel{\‾}{P_1}}{N_0+I_0};$

The CQI information of cooperation cell: ${\mathrm{CQI}}_2=\frac{\stackrel{\‾}{P_2}}{N_0+I_0}.$

Wherein, P _i=P _i× PL _i, P has represented the transmitting power of each cell base station, PL is the path loss of each cell base station to UE terminal, N ₀for the reception noise of UE end, I ₀for other disturbing factors outside the set of cooperation cell.

Concrete realizing in engineering, UE, according to the reference symbol receiving, measures each cooperation cell mean receiving power of (comprising Serving cell):

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}\left|\right|}^2,i=\mathrm{1,2}$

Wherein, H _{i, k}be the channel matrix to UE on k the subcarrier of i cooperation cell in Measurement bandwidth, mean receiving power calculates taking overall channel state information as benchmark.

Mean receiving power also can calculate as follows:

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}(m,n)\left|\right|}^2,i=\mathrm{1,2}$

Wherein, H _{i, k}the channel matrix to UE on k the subcarrier of i cooperation cell in Measurement bandwidth,

H _{i, k}(m, n) is the channel coefficients of n transmit antennas to m root reception antenna, and mean receiving power information is calculated as benchmark the channel of dual-mode antenna taking certain.

The value of m and n is for pre-determining as being fixed as (1,1) or being arranged by base station and UE.

The computer capacity of mean receiving power can be whole bandwidth or predetermined one section of frequency band.

Step S403, UE terminal send multiple communities CQI information of measuring base station to Serving cell.

Step S404, base station in service sector and base station, cooperation cell obtain the channel condition information H between UE terminal.

In concrete application scenarios, the preparation method of above-mentioned channel condition information H comprises following two kinds, and detailed process is described as follows:

Method one, UE terminal send SRS signal (Sounding Reference Signal), the SRS sending is received by multiple cell base stations, the base station end of many communities is measured SRS signal and is obtained UE terminal up channel state information, obtains descending channel condition information Hi according to channel reciprocity.Yi Liang community is example: i.e. Serving cell H ₁, cooperation cell H ₂.

Method two, UE terminal are measured the CSI-CS (channel condition information reference symbol) that multi-cell base station sends, and the Hi matrix of each community Hi is quantized to compression and process, or the Hi matrix that directly feeds back multiple communities is to Serving cell.

In addition, the Hi matrix information that in above-mentioned two kinds of methods, base station or UE measure, before further processing, all needs the normalization of channel condition information power, and concrete power normalization method is as follows:

${\stackrel{\‾}{H}}_{i,k}=\frac{H_{i,k}}{{\stackrel{\‾}{P}}_i}$

The computational methods of the mean receiving power in denominator should be consistent with the method for UE calculating average power in step S402, for two kinds of above-mentioned account forms, because the factors such as the receiver gain of UE and base station end, channel conditions, witness mark symbol are different, the power normalization matrix obtaining is numerical value difference specifically, but is identical for the account form of power normalization.

Multiple cell base stations in step S405, cooperation cell set carry out information interaction, make the precoding information wi of acquisition cooperation cell, Serving cell scheduling UE, or directly obtain interfere information.

If use the channel condition information Hi of SRS in the many communities of each cell measurement, the normalization channel condition information H that also needs interactive cooperation cell base station to measure _{i, k}.

Step S406, base station be according to the CQI information of cooperation cell, the normalization channel condition information H of cooperation cell _{i, k}, and the pre-coding matrix information wi of cooperation cell, calculate and obtain SINR.

For example, $\mathrm{SINR}=\frac{{\stackrel{\‾}{P}}_1\×{\left|\right|{\stackrel{\‾}{H}}_{1,k}{w}_1\left|\right|}^2}{\underset{i=2}{\overset{N}{\mathrm{\Σ}}}{\stackrel{\‾}{P}}_i\×{\left|\right|{\stackrel{\‾}{H}}_{i,k}{w}_i\left|\right|}^2+I_0+N_0}=\frac{{\mathrm{CQI}}_1\×{\left|\right|{\stackrel{\‾}{H}}_{1,k}{w}_1\left|\right|}^2}{1+\underset{i=2}{\overset{N}{\mathrm{\Σ}}}{\mathrm{CQI}}_i\×{\left|\right|{\stackrel{\‾}{H}}_{i,k}{w}_i\left|\right|}^2}$

Wherein, H _{i, k}the descending normalization channel condition information between corresponding base station, described each community and described terminal,

W ₁descending the used pre-coding matrix information that base station corresponding to described Serving cell determined,

W _ibe the scheduling of described cooperation cell dispatch with described Serving cell the precoding information that resource that the resource of described terminal is identical is used,

CQI ₁the corresponding CQI information in described Serving cell,

CQI _ithe corresponding CQI information in described cooperation cell.

It is pointed out that above-mentioned algorithm is a kind of preferred embodiment that the present invention provides for convenience of description, in reality, can use more complicated algorithm, the variation of specific algorithm rule can't affect protection scope of the present invention.

Modulation coding mode MCS and the frequency domain resource that descending transmission data are used determined according to SINR in step S407, base station.

Compared with prior art, the embodiment of the present invention has the following advantages:

By the technical scheme of the application embodiment of the present invention, the resource information that makes base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out accordingly user's scheduling, resource distribution and MCS and select, thereby, improve throughput and the treatment effeciency of multi-plot joint processing.

In order to realize the technical scheme of the embodiment of the present invention, the embodiment of the present invention also provides a kind of base station, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in multiple communities, Yi Ge community is terminal, other communities are the cooperation cell of terminal, corresponding base station, each community provides cooperation transmission service, this corresponding with service community, base station for terminal.

As shown in Figure 5, the structural representation of a kind of base station providing for the embodiment of the present invention, specifically comprises:

Receiver module 51, for the CQI information of receiving terminal transmission Ge community.

Acquisition module 52, for obtaining the channel condition information of each community to terminal, and the interfere information of the resource to Serving cell dispatch terminal is dispatched in cooperation cell.

In concrete application scenarios, acquisition module 52 obtains the channel information of terminal, is specially:

Acquisition module 52 receiving terminals send the downlink channel condition information between corresponding base station, Ge community and terminal; Or,

The SRS signal that acquisition module 52 receiving terminals send, and according to the up channel state information between base station corresponding to SRS signal acquisition terminal Yu Ge community, and obtain the downlink channel condition information between corresponding base station, each community and terminal according to channel reciprocity.

Wherein, when the base station that acquisition module 52 obtains Serving cell obtain each community to the channel information of terminal before, also comprise:

Be the CRS that sent according to each base station of receiving by terminal and/or CSI-RS while calculating when acquisition module 52 obtains Ge community to the channel condition information of terminal, terminal is normalized according to the downlink channel condition information between corresponding base station, following formula Dui Ge community and terminal:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _{i, k}being described terminal estimates the channel matrix to described terminal on k the subcarrier in Measurement bandwidth of i the cooperation cell obtaining according to CRS and/or CSI-RS,

P _ifor described terminal is calculating the mean receiving power of using when CQI;

Or,

When acquisition module 52 is according to the SRS signal of the terminal transmission receiving, while determining the downlink channel condition information between corresponding base station, each community and terminal, acquisition module is normalized according to the downlink channel condition information between corresponding base station, following formula Dui Ge community and terminal:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _{i, k}on k the subcarrier in Measurement bandwidth that the SRS signal that to be i cooperation cell send according to described terminal obtains, arrive the channel matrix of described terminal,

P _ifor the mean receiving power of the base station of described each community.

Determination module 53, obtains cooperation cell for the base station of the channel condition information to terminal, Serving cell according to the CQI information of each community, each community and dispatches the interfere information of the resource to Serving cell dispatch terminal, determines SINR.

Processing module 54, for according to the determined SINR of determination module 53, really directional terminals sends the mode of downlink data.

In concrete application scenarios, concrete processing procedure is:

Processing module 54 is according to SINR, and really directional terminals sends modulation coding mode MCS and the frequency domain resource of downlink data.

On the other hand, the embodiment of the present invention also provides a kind of terminal, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in multiple communities, Yi Ge community is terminal, other communities are the cooperation cell of terminal, and corresponding base station, each community provides cooperation transmission service for terminal.

As shown in Figure 6, the structural representation of a kind of terminal proposing for the embodiment of the present invention, specifically comprises:

Receiver module 61, the CRS and/or the CSI-RS that send respectively for receiving corresponding base station, each community;

Computing module 62, for the CRS and/or the CSI-RS that send according to the received each base station of receiver module 61, calculates the corresponding CQI information in each community;

In concrete application scenarios, CRS and/or CSI-RS that computing module sends according to the each base station receiving, calculate the corresponding CQI information in each community, specifically calculates by following formula:

${\mathrm{CQI}}_i=\frac{\stackrel{\‾}{P_i}}{N_0+I_0}$

Wherein, P _ifor terminal receives the received power of the signal of each community,

N ₀for the reception noise of terminal,

I ₀other disturbing factors outside Wei Ge community.

Sending module 63, sends for the base station to Serving cell the CQI information that computing module generates.

Compared with prior art, the embodiment of the present invention has the following advantages:

By the technical scheme of the application embodiment of the present invention, the resource information that makes base station utilize the multi-cell channel quality information He Ge community of terminal feedback to distribute for this terminal is determined Signal Interference and Noise Ratio, and carry out accordingly user's scheduling, resource distribution and MCS and select, thereby, improve throughput and the treatment effeciency of multi-plot joint processing.

Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention and can realize by hardware, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment 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 that each implements the method described in scene in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the embodiment of the present invention in some instructions.

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

It will be appreciated by those skilled in the art that the module in the device of implementing in scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into multiple submodules.

The invention described above embodiment sequence number, just to describing, does not represent the quality of implementing scene.

Disclosed is above only the several concrete enforcement scene of the embodiment of the present invention, and still, the embodiment of the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into the traffic limits scope of the embodiment of the present invention.

Claims (11)

1. definite method of a multi-cell channel information, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in described multiple community, Yi Ge community is terminal, other communities are the cooperation cell of described terminal, corresponding base station, described each community provides cooperation transmission service for described terminal, it is characterized in that, comprising:

The base station of described Serving cell receives the channel quality indicator CQI information of described each community of described terminal transmission;

The base station of described Serving cell obtains the channel condition information of described each community to described terminal;

The base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell;

The base station of the base station of described the Serving cell channel condition information to described terminal, described Serving cell according to the CQI information of described each community, described each community obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, determines Signal Interference and Noise Ratio SINR;

Wherein, the base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, is specially:

What the base station of described Serving cell obtained the scheduling of described cooperation cell dispatches with described Serving cell the precoding information that resource that the resource of described terminal is identical is used.

2. the method for claim 1, is characterized in that, the base station of described Serving cell also comprises before receiving the CQI information of described each community of described terminal transmission:

Corresponding base station, described each community sends respectively public reference signal CRS and/or channel state information reference signals CSI-RS;

CRS and/or CSI-RS that described terminal sends according to the each described base station receiving, calculate the corresponding CQI information in each community;

Described terminal sends the CQI information of described each community to the base station of described Serving cell.

3. method as claimed in claim 2, is characterized in that, CRS and/or CSI-RS that described terminal sends according to the each described base station receiving, calculate the corresponding CQI information in each community, specifically calculates by following formula:

${\mathrm{CQI}}_i=\frac{\stackrel{\‾}{P_i}}{N_0+I_0}$

Wherein, for described terminal receives the mean receiving power of the signal of described each community,

N ₀for the reception noise of described terminal,

I ₀for other disturbing factors outside described each community.

4. the method for claim 1, is characterized in that, the base station of described Serving cell obtains the channel condition information of described each community to described terminal, is specially:

The base station of described Serving cell receives the downlink channel condition information between corresponding base station, described each community and the described terminal that described terminal sends; Or,

The base station of described each community receives the SRS signal that described terminal sends, and according to the up channel state information between base station corresponding to terminal described in described SRS signal acquisition and described each community, and obtain the downlink channel condition information between corresponding base station, described each community and described terminal according to channel reciprocity.

5. method as claimed in claim 4, is characterized in that, the base station of described Serving cell obtains described each community to before the channel condition information of described terminal, also comprises:

The described each community obtaining when the base station of described Serving cell is the CRS that sent according to the described each base station receiving by described terminal and/or CSI-RS while calculating to the channel condition information of described terminal, and described terminal is normalized the downlink channel condition information between corresponding base station, described each community and described terminal according to following formula:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _i,kbeing described terminal estimates the channel matrix to described terminal on k the subcarrier in Measurement bandwidth of i the cooperation cell obtaining according to CRS and/or CSI-RS,

for described terminal is calculating the mean receiving power of using when CQI;

Or,

The SRS signal sending according to the described terminal receiving when the base station of described each community, while determining the downlink channel condition information between corresponding base station, described each community and described terminal, base station corresponding to described each community is normalized the downlink channel condition information between corresponding base station, described each community and described terminal according to following formula:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _i,kon k the subcarrier in Measurement bandwidth that the SRS signal that to be i cooperation cell send according to described terminal obtains, arrive the channel matrix of described terminal,

for the mean receiving power of the base station of described each community.

6. the method as described in claim 3 or 5, is characterized in that,

Described terminal receives the mean receiving power of signal of described each community or the mean receiving power of the base station of described each community, specifically calculates by following formula:

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}\left|\right|}^2,i=\mathrm{1,2}...$

Wherein, H _i,kit is the channel matrix to described terminal on k the subcarrier of i cooperation cell in Measurement bandwidth; Or,

Described terminal receives the mean receiving power of signal of described each community or the mean receiving power of the base station of described each community, specifically calculates by following formula:

$\stackrel{\‾}{P_i}=\frac{1}{N}\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\left|\right|H_{i,k}(m,n)\left|\right|}^2,i=\mathrm{1,2}...$

Wherein, H _i,kthe channel matrix to described terminal on k the subcarrier of i cooperation cell in Measurement bandwidth, H _i,k(m, n) is the channel coefficients of n transmit antennas to m root reception antenna;

Wherein, the computer capacity of the described terminal reception mean receiving power of signal of described each community or the mean receiving power of the base station of described each community can be whole bandwidth or predetermined one section of frequency band.

7. the method for claim 1, is characterized in that, also comprises:

The mode that sends downlink data to described terminal, according to described SINR, is determined in the base station of described Serving cell, and wherein, the mode of described downlink data comprises modulation coding mode MCS and frequency domain resource.

8. a base station, be applied in the mobile communication system of supporting multiple cell cooperative transmission, the Serving cell that in described multiple community, Yi Ge community is terminal, other communities are the cooperation cell of described terminal, corresponding base station, described each community provides cooperation transmission service for described terminal, it is characterized in that, corresponding described Serving cell, described base station, comprising:

Receiver module, for receiving the CQI information of described each community that described terminal sends;

Acquisition module, for obtaining the channel condition information of described each community to described terminal, and the scheduling of described cooperation cell is dispatched the interfere information of the resource of described terminal to described Serving cell;

Determination module, obtain the scheduling of described cooperation cell for the base station of the channel condition information to described terminal, described Serving cell according to the CQI information of described each community, described each community the interfere information of the resource of described terminal is dispatched in described Serving cell, determine Signal Interference and Noise Ratio SINR;

Processing module, for according to the determined SINR of described determination module, determines the mode that sends downlink data to described terminal;

Wherein, the base station of described Serving cell obtains the scheduling of described cooperation cell the interfere information of the resource of described terminal is dispatched in described Serving cell, is specially:

What the base station of described Serving cell obtained the scheduling of described cooperation cell dispatches with described Serving cell the precoding information that resource that the resource of described terminal is identical is used.

9. base station as claimed in claim 8, is characterized in that, described acquisition module obtains the channel information of described terminal, is specially:

Described acquisition module receives the downlink channel condition information between corresponding base station, described each community and the described terminal that described terminal sends; Or,

Described acquisition module receives the SRS signal that described terminal sends, and according to the up channel state information between base station corresponding to terminal described in described SRS signal acquisition and described each community, and obtain the downlink channel condition information between corresponding base station, described each community and described terminal according to channel reciprocity.

10. base station as claimed in claim 9, is characterized in that, when described acquisition module obtain described each community to the channel condition information of described terminal before, also comprise:

When described each community that described acquisition module obtains is the CRS that sent according to the described each base station receiving by described terminal and/or CSI-RS while calculating to the channel condition information of described terminal, described terminal is normalized the downlink channel condition information between corresponding base station, described each community and described terminal according to following formula:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _i,kbeing described terminal estimates the channel matrix to described terminal on k the subcarrier in Measurement bandwidth of i the cooperation cell obtaining according to CRS and/or CSI-RS,

for described terminal is calculating the mean receiving power of using when CQI;

Or, when described acquisition module is according to the SRS signal of the described terminal transmission receiving, while determining the downlink channel condition information between corresponding base station, described each community and described terminal, described acquisition module is normalized the downlink channel condition information between corresponding base station, described each community and described terminal according to following formula:

$\stackrel{\‾}{H_{i,k}}=\frac{H_{i,k}}{\stackrel{\‾}{P_i}}$

Wherein, H _i,kon k the subcarrier in Measurement bandwidth that the SRS signal that to be i cooperation cell send according to described terminal obtains, arrive the channel matrix of described terminal,

for the mean receiving power of the base station of described each community.

11. base stations as claimed in claim 8, is characterized in that, described processing module, according to described SINR, is determined the mode that sends downlink data to described terminal, is specially

Described processing module, according to described SINR, is determined the modulation coding mode MCS from downlink data to described terminal and the frequency domain resource that send.