CN103220088A - Method, terminal and base station for uplink interference cancellation - Google Patents

Abstract

The invention discloses a method, a terminal and a base station for uplink interference cancellation. The terminal receives precoding information from a service base station, the precoding information is adjusted according to channel state information from the terminal to a collaborative base station, and data are sent to the service base station according to an obtained adjusted precoding matrix. The service base station or the collaborative base station adjusts the precoding information used by the terminal according to the channel state information from the terminal to the collaborative base station to obtain adjusted precoding matrix information, the service base station or the collaborative base station sends the adjusted precoding matrix information to the terminal, and the terminal sends data to the service base station according to the adjusted precoding matrix. The service base station or the collaborative base station adjusts the precoding information used by the terminal according to the channel state information from the terminal to the collaborative base station to obtain the adjusted matrix information, the service base station or the collaborative base station sends an adjusted matrix and the precoding information used by the terminal to the terminal, and the terminal adjusts the used precoding information to obtain an adjusted precoding matrix according to the adjusted matrix and sends data to the service base station according to the adjusted precoding matrix. The method, the terminal and the base station for the uplink interference cancellation can achieve interference suppression at a sending end.

Description

Method, terminal and base station that a kind of uplink interference is offset

Technical field

The present invention relates to wireless communication technology field, relate in particular to method, terminal and base station that a kind of uplink interference is offset.

Background technology

Along with the fast development of wireless communication technology, the frequency spectrum resource of wretched insufficiency becomes the principal element of restriction radio communication development gradually; How to make full use of limited frequency spectrum resources, improving the availability of frequency spectrum is the great difficult problem of radio communication.Multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Output) technology can improve efficiency of transmission under the situation that does not increase bandwidth because of it and the availability of frequency spectrum obtains extensive favor.The MIMO technology has been utilized space diversity gain by transmitting and receiving diversity, has utilized antenna array gain by beam forming technique, has utilized the spatial reuse gain by space multiplexing technique.Particularly, obtain the weak correlation that diversity gain utilizes space channel, and the selectivity on binding time/frequency, transmit diversity provides more copy for the transmission of signal, receive diversity is to have received a plurality of copies in the space that transmit, and then improves the reliability of signal transmission, thereby improves the signal to noise ratio of received signal, for example empty block code (SFBC, Space Frequency Block Code) frequently; Obtain array gain and utilize the strong correlation of space channel, by little spacing aerial array is installed, thereby make the electromagnetic wave that transmits in the space produce and interfere the antenna pattern that forms highly directive, make the main lobe directed towards user arrival bearing adaptively of antenna pattern, thereby raising signal to noise ratio, improve power system capacity or coverage, for example single current beam shaping (Single StreamBeamforming); Obtaining the spatial reuse gain also is the weak correlation of utilizing space channel, on a plurality of separate space channels, transmit different data flow, thereby improve the peak rate of transfer of data, Single User MIMO (SU-MIMO for example, Single User MIMO) can (RB be that a user sends a plurality of data flow simultaneously on ResourceBlock) in same resource block.

In LTE Release 8/9, public reference signal (CRS, Common ReferenceSignal) and detection reference signal (SRS, Sounding Reference Signal) have been defined.Subscriber equipment (UE, User Equipment) and strengthen node base station (eNB, enhanced Node Base station) can carry out down channel and up channel respectively by CRS and SRS and measure, provide basic reference information for UE and eNB select different MIMO transmission mode and scheduling of resource.LTE Release 8/9 supported transmission mode comprises diversity, open loop SU-MIMO, closed loop SU-MIMO and closed loop multiuser MIMO (MU-MIMO, Multiple User MIMO).

In LTE Release later release, defined channel state information reference signals (CSI-RS, Channel State Information-Reference Signal) and be exclusively used in channel measurement.UE can measure and calculate pre-coding matrix index (PMI to base station feedback by CSI-RS, Precoding MatrixIndicator), channel quality information indication (CQI, Channel Quality Indicator) and order indication information such as (RI, Rank Indicator).CSI-RS provides possibility for further improving cell spectrum utilance, especially the cell edge availability of frequency spectrum, because CSI-RS is coordinate multipoint (CoMP, CooperativeMulti-Point) The Application of Technology provides possibility, the CoMP technology makes the MIMO technology no longer be confined to single sub-district, but but multi-plot joint is handled and coordination.

Descending CoMP technology mainly comprises two kinds of forms:

Cooperative scheduling/cooperative beam figuration (CS/CB, Coordinated Scheduling/CoordinatedBeamforming): data are only launched from Serving cell, but UE scheduling or wave beam forming (BF, Beamforming) mode is to be finished jointly by cooperation point;

Unite emission (JT, Joint Transmission): data are by each cooperation point Combined Treatment, and promptly the data of each UE are all united emission by all cooperation points, to improve the quality of reception, to eliminate and disturb.

Up CoMP technology mainly comprises owing to being limited to the difficulty of cooperating between the UE:

Unite reception (JR, Joint Reciever): promptly a plurality of cooperation acceptance points, comprise that service acceptance point (serving BS) receives the data that UE sends, carry out remerging after joint-detection or the independent detection, to improve the quality of reception.

According to last, the technical characterstic of descending CoMP as can be seen, descending CoMP technology can not only realize the coordination of precoding, can also reduce interference, and up CoMP technology only is the increase to received energy, interference be there is no inhibitory action, even will have interference mitigation technology now is used in combination with the CoMP technology, for example based on linear minimum mean-squared error (LMMSE, Linear Minimum Mean Square Error) JR of criterion reception also is a kind of passive interference mitigation technology, also can not be as descending CoMP technology, when sending, just consider interference eliminated, promptly eliminate interference in advance at transmitting terminal; Thereby can make the performance of up JR technology be affected.Prior art provides the effective scheme that addresses the above problem.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and terminal of uplink interference counteracting, suppresses to realize that transmitting terminal disturbs, and promotes the performance of coordinate multipoint technology.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides the method that a kind of uplink interference is offset, this method comprises:

Terminal receives the precoding information from serving BS, according to described terminal to the channel condition information between cooperative base station that obtains described precoding information adjustment is obtained adjusting pre-coding matrix;

Terminal sends data according to described adjustment pre-coding matrix to described serving BS.

This method further comprises:

Under the FDD pattern, terminal to the channel condition information between cooperative base station is measured by described cooperative base station; Described cooperative base station is notified to serving BS with the channel condition information that measures, and is notified to described terminal by serving BS; Perhaps described cooperative base station directly is notified to described terminal with the channel condition information that measures.

This method further comprises:

Under the TDD pattern, described terminal is measured the channel condition information of cooperative base station to described terminal room, and determines that according to described cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station.

The terminal that described foundation is obtained to the channel condition information between cooperative base station obtains adjusting pre-coding matrix to precoding information adjustment, for:

Described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS, determines to adjust matrix according to described terminal; Perhaps, according to described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that described terminal sends to serving BS to the channel condition information between serving BS, described terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, described pre-coding matrix is determined according to precoding information.

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

This method further comprises:

Described terminal is carried out one of at least the power adjustment according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

The terminal that the present invention also provides a kind of uplink interference to offset, this terminal comprises:

First adjusting module is used to receive the precoding information that serving BS sends to terminal, according to described terminal to the channel condition information between cooperative base station that obtains described precoding information adjustment is obtained adjusting pre-coding matrix;

First sending module is used for sending data according to described adjustment pre-coding matrix to described serving BS.

Under the FDD pattern, described terminal to the channel condition information between cooperative base station is measured by described cooperative base station;

The channel condition information that described cooperative base station measures is notified to described terminal by serving BS, perhaps directly is notified to described terminal.

Described first adjusting module is further used for, under the TDD pattern, measure the channel condition information of cooperative base station, and determine that according to described cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station to described terminal room.

Described first adjusting module is further used for, and to the channel condition information between cooperative base station, from the precoding information of serving BS, determines to adjust matrix according to described terminal; Perhaps, according to described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that described terminal sends to serving BS to the channel condition information between serving BS, described terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, described pre-coding matrix is determined according to precoding information.

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

Described first adjusting module is further used for,

One of at least carry out the power adjustment according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information and carry out the power adjustment, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

The method that the present invention also provides a kind of uplink interference to offset, this method comprises:

Serving BS or cooperative base station are adjusted the precoding information that described terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix, adjust pre-coding matrix and adjust pre-coding matrix information accordingly, and described adjustment pre-coding matrix information is sent to described terminal; Described terminal is determined the corresponding pre-coding matrix of adjusting according to the adjustment pre-coding matrix information that receives, and sends data according to the adjustment pre-coding matrix of determining to described serving BS;

Perhaps, serving BS or cooperative base station are adjusted the precoding information that described terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix and adjust matrix information accordingly, and the precoding information of described adjustment matrix information and terminal employing is sent to described terminal; Described terminal is determined corresponding pre-coding matrix according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to described serving BS according to described adjustment pre-coding matrix.

This method further comprises:

When the precoding information that serving BS adopts described terminal according to the channel condition information of terminal between cooperative base station was adjusted, described terminal to the channel condition information between cooperative base station was notified to serving BS by cooperative base station.

This method further comprises:

When the precoding information that cooperative base station adopts described terminal according to the channel condition information of terminal between cooperative base station is adjusted, the precoding information that described terminal adopts is notified to cooperative base station by serving BS, and adjustment matrix information that described terminal receives or adjustment pre-coding matrix information send to terminal by cooperative base station via serving BS.

This method further comprises: adjust pre-coding matrix=adjustment matrix * pre-coding matrix,

Described adjustment matrix is determined according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that described terminal adopts, terminal send to serving BS to the channel condition information between serving BS, described terminal to channel condition information between cooperative base station and following information.

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

This method further comprises: adjusts pre-coding matrix=power and adjusts matrix * adjustment matrix * pre-coding matrix,

Wherein, described power is adjusted matrix by terminal determining one of at least according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information; Perhaps, by serving BS or cooperative base station determining one of at least: from power control information, the HARQ feedback information of serving BS according to following information.

The base station that the present invention also provides a kind of uplink interference to offset is serving BS or cooperative base station,

This base station comprises: second adjusting module, be used for the precoding information that described terminal adopts being adjusted according to terminal to the channel condition information between cooperative base station, and obtain adjusting matrix, adjust pre-coding matrix and adjust pre-coding matrix information accordingly;

Second sending module, be used for described adjustment pre-coding matrix information is sent to described terminal, determine the corresponding pre-coding matrix of adjusting for described terminal according to the adjustment pre-coding matrix information that receives, and send data to described serving BS according to the adjustment pre-coding matrix of determining;

Perhaps comprise: adjust the matrix determination module, be used for the precoding information that described terminal adopts being adjusted, obtain adjusting matrix and adjust matrix information accordingly according to terminal to the channel condition information between cooperative base station;

The 3rd sending module is used for the precoding information of described adjustment matrix information and terminal employing is sent to described terminal; Determine corresponding pre-coding matrix for described terminal according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to described serving BS according to described adjustment pre-coding matrix.

When the base station that described uplink interference is offset was serving BS, described terminal to the channel condition information between cooperative base station was notified to serving BS by cooperative base station.

When the base station that described uplink interference is offset is cooperative base station, the precoding information that described terminal adopts is notified to cooperative base station by serving BS, and adjustment matrix information that described terminal receives or adjustment pre-coding matrix information send to terminal by cooperative base station via serving BS.

Adjust pre-coding matrix=adjustment matrix * pre-coding matrix,

Described adjustment matrix is determined according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that described terminal adopts, terminal send to serving BS to the channel condition information between serving BS, described terminal to channel condition information between cooperative base station and following information.

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

Adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix,

Wherein, described power is adjusted matrix by terminal determining one of at least according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information; Perhaps, by described base station determining one of at least according to following information: power control information, HARQ feedback information from serving BS are determined.

Method and terminal that a kind of uplink interference provided by the present invention is offset can realize that the interference of transmitting terminal suppresses, and have promoted the performance of coordinate multipoint technology.

Description of drawings

Fig. 1 is the method flow diagram that a kind of uplink interference of the embodiment of the invention is offset;

Fig. 2 is the schematic diagram that the uplink interference of the embodiment of the invention is offset;

The schematic diagram that Fig. 3 offsets for the uplink interference that has the power adjustment of the embodiment of the invention;

Fig. 4 is the uplink interference channel measurement schematic diagram under the fdd mode of the embodiment of the invention;

Fig. 5 is the uplink interference channel measurement schematic diagram under the tdd mode of the embodiment of the invention;

Fig. 6 is the structural representation of the terminal offset of a kind of uplink interference of the embodiment of the invention;

Fig. 7 is the method flow diagram that a kind of uplink interference of another embodiment of the present invention is offset;

Fig. 8 is the structural representation of a kind of uplink interference of the embodiment of the invention base station of offsetting;

Fig. 9 is the method flow diagram that a kind of uplink interference of yet another embodiment of the invention is offset;

Figure 10 is the structural representation of a kind of uplink interference of yet another embodiment of the invention base station of offsetting.

Embodiment

The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.

The method that a kind of uplink interference that the embodiment of the invention provided is offset mainly comprises as shown in Figure 1:

Step 101, terminal receives the precoding information from serving BS, according to terminal to the channel condition information between cooperative base station that obtains precoding information adjustment is obtained adjusting pre-coding matrix.

Terminal in the embodiment of the invention is specified by serving BS.

Under Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplexing) pattern, terminal to the channel condition information between cooperative base station is measured by cooperative base station; Cooperative base station is notified to serving BS with the channel condition information that measures, and is notified to terminal by serving BS, and perhaps, cooperative base station directly is notified to terminal with the channel condition information that measures.

Under time division duplex (TDD, Time Division Duplexing) pattern, terminal is measured the channel condition information of cooperative base station to terminal room, and determines that according to cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station.

Wherein, to the channel condition information between cooperative base station precoding information is carried out the phase place adjustment according to the terminal of obtaining and obtains adjusting pre-coding matrix, be specially:

Terminal to the channel condition information between cooperative base station, from the precoding information of serving BS, determines to adjust matrix according to terminal; Perhaps, according to terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that terminal sends to serving BS to the channel condition information between serving BS, terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, pre-coding matrix is determined according to precoding information.

Wherein, terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

Preferable, terminal can be according to following information carry out one of at least the power adjustment: from the power control information of serving BS, mix automatic repeat requests (HARQ, Hybrid Automatic Repeat Request) feedback information, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

Step 102, terminal sends data according to adjusting pre-coding matrix to serving BS.

The method of uplink interference shown in Figure 1 being offset below in conjunction with specific embodiment further elaborates.

The schematic diagram that Fig. 2 offsets for uplink interference among the present invention, among this embodiment, base station 1,2,3 is positioned at (being the colocation site base station) on the identical site, and information exchange can directly be carried out between the base station, does not need BackHaul (back haul link).For the UE1 serving base station is base station 1, for the UE2 serving base station is base station 2, for the UE3 serving base station is base station 3.When base station 2 was served to UE2, cooperative base station was base station 1 and base station 3.

In the uplink process, each serving BS has all fed back optimum PMI to service UE.For example: PMI11 has been fed back to UE1 in base station 1, and corresponding precoding vector is W ₁₁PMI22 has been fed back to UE2 in base station 2, and corresponding precoding vector is W ₂₂PMI33 has been fed back to UE3 in base station 3, and corresponding precoding vector is W ₃₃

Is example with base station 2 to the UE2 service, in order to improve the receptivity of base station 2, wishes to improve its received signal to noise ratio, and general JR method is introduced as background technology, and base station 1, base station 2 and base station 3 all can receive the data s that UE2 sends ₂, carry out JR then and merge to receive, and if UE1 takies identical resource with UE3 and UE2, and directly adopt the precoding vectors W of base station 1 and base station 3 appointments ₁₁And W ₃₃, will cause interference to the reception of base station 2 so, and the interference elimination method among the present invention can reduce interfering energy.Concrete grammar is as follows:

For base station 2, UE1 will produce interference to base station 1 transmission upstream data and UE3 to UE2 when base station 3 sends upstream datas, therefore the precoding vectors to cooperative base station 1 and base station 3 carries out the phase place adjustment, thereby make that the signal of UE1 transmission and the signal that UE 3 sends are reverse stacks when 2 places superpose in the base station, reach and disturb the purpose of cancelling out each other.

Now adjust to example the interference cancellation process be described with the precoding that UE1 is used:

If adopt Rank (order)=2 transmission this moment, and the data of UE1 transmission $s_1=\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right],$ Interference channel is that UE1 is to the up channel between the base station 2, channel coefficient matrix H ₂₁Be the matrix of the capable T row of R, the data that UE3 sends are s ₃, interference channel is that UE3 is to the up channel between the base station 2, channel coefficient matrix H ₂₃Be the matrix of the capable T row of R, then UE1 and the UE3 interference signal that 2 places produce in the base station is:

$I=H_{21}{W}_{11}{s}_1+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3=H_{21}{W}_{11}\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

Interference Cancellation process with UE1 is that example describes: if the antenna for base station number is T, then the adjustment matrix of UE1 is a diagonal matrix: diag (V ₁)=[e ^{J θ 1}e ^{J θ 2}... e ^{J θ T}]

Accordingly, the adjustment pre-coding matrix of UE1 is: (V ₁V ₁₁)

After UE1 adjusted, UE1 and the UE3 interference signal that 2 places produce in the base station was:

$I=H_{21}(V_1\&CenterDot;W_{11})s_1+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3=H_{21}(V_1\&CenterDot;W_{21})\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

When UE3 does not carry out the Interference Cancellation operation, optimum V ₁Satisfy following condition:

$V_1^{\mathrm{opt}}=\underset{V_1}{\min }\left(I\right)=H_{21}(V_1\&CenterDot;W_{11})s_1=H_{21}(V_1\&CenterDot;W_{21})\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]$

Thereby obtain V ₁Be UE before sending data, minimize and find the solution the adjustment matrix V by calculating interference signal I=0 or I ₁

With 2 (transmitting antenna) * 2 (reception antenna) is example:

$I=H_{21}(V_1\&CenterDot;W_{11})s_1+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3=\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right](\left[\begin{array}{cc}{e}^{{\mathrm{j\&theta;}}_1}& 0\\ 0& e^{{\mathrm{j\&theta;}}_2}\end{array}\right]\&CenterDot;\left[\begin{array}{cc}{w}_{11}& w_{12}\\ w_{21}& w_{22}\end{array}\right])\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}{W}_{23}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

$=\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right]\left[\begin{array}{cc}{e}^{{\mathrm{j\&theta;}}_1}{w}_{11}& e^{{\mathrm{j\&theta;}}_1}{w}_{12}\\ e^{j{\mathrm{\&theta;}}_2}{w}_{21}& e^{{\mathrm{j\&theta;}}_2}{w}_{22}\end{array}\right]\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

$=\left[\begin{array}{cc}{h}_{11}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{12}{e}^{{\mathrm{j\&theta;}}_2}{w}_{21}& h_{11}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="12"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{12}+h_{12}{e}^{j{\mathrm{\&theta;}}_2}{w}_{22}\\ h_{21}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{22}{e}^{j{\mathrm{\&theta;}}_2}{w}_{21}& h_{21}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="12"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{12}+h_{22}{e}^{j{\mathrm{\&theta;}}_2}{w}_{22}\end{array}\right]\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

$=\left[\begin{array}{c}(h_{11}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{12}{e}^{{\mathrm{j\&theta;}}_2}{w}_{21})s_{11}+(h_{11}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="12"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{12}+h_{12}{e}^{j{\mathrm{\&theta;}}_2}{w}_{22})s_{12}\\ (h_{21}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{22}{e}^{j{\mathrm{\&theta;}}_2}{w}_{21})s_{11}+(h_{21}{e}^{{\mathrm{j\&theta;}}_1}{\mathrm{<figure-callout\; id="12"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{12}+h_{22}{e}^{{\mathrm{j\&theta;}}_2}{w}_{22})s_{12}\end{array}\right]+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

When UE3 also carries out interference cancellation, adopt and the similar method of UE1.Finally, after UE1 and UE3 carried out the process of interference cancellation, UE1 and the UE3 interference signal that 2 places produce in the base station was:

$I=H_{21}(V_1\&CenterDot;W_{11})s_1+H_{23}({\mathrm{<figure-callout\; id="3"\; label="V"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">V</figure-callout>}}_3\&CenterDot;W_{33}){\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3=H_{21}(\left[\begin{array}{cc}{e}^{j{\mathrm{\&theta;}}_1}& 0\\ 0& e^{j{\mathrm{\&theta;}}_2}\end{array}\right]\&CenterDot;W_{11})\left[\begin{array}{c}{s}_{11}\\ s_{12}\end{array}\right]+H_{23}(\left[\begin{array}{cc}{e}^{j{\mathrm{\&theta;}}_3}& 0\\ 0& e^{j{\mathrm{\&theta;}}_4}\end{array}\right]\&CenterDot;W_{33}){\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

UE1 minimizes and finds the solution the adjustment matrix V by calculating interference signal I=0 or I before transmission ₁, UE3 minimizes and finds the solution the adjustment matrix V by calculating interference signal I=0 or I before transmission ₃

Need to prove that the foregoing description is that the interference signal that receives on two antennas with elimination is that example describes; In the practical application, can carry out the interference cancellation on the part reception antenna, not necessarily need all antennas all to carry out interference cancellation, thereby can reduce complicated operation degree and signaling complexity.For example: $V=\left[\begin{array}{cc}{e}^{\mathrm{j\&theta;}}& 0\\ 0& 1\end{array}\right]$ Or $V=\left[\begin{array}{cc}1& 0\\ 0& e^{\mathrm{j\&theta;}}\end{array}\right],$ Only can regulate interference signal antenna on, unless the characteristic of channel of two antennas identical owing to have only a variable in the adjustment matrix this moment.

Need to prove that also the foregoing description is example with Rank=2, but Rank is applicable to interference cancellation method of the present invention more than or equal to 1 situation.Still with transmitting antenna, the antenna of 2 reception antennas is an example:

Rank=1, promptly UE1 only sends 1 data flow; Accordingly, carry out the process of interference eliminated at UE1 after, UE1 and the UE3 interference signal that 2 places produce in the base station is:

$I=H_{21}(V_1\&CenterDot;W_{11})s_1+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3=\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right](\left[\begin{array}{cc}{e}^{j{\mathrm{\&theta;}}_1}& 0\\ 0& e^{j{\mathrm{\&theta;}}_2}\end{array}\right]\&CenterDot;\left[\begin{array}{c}{w}_{11}\\ w_{21}\end{array}\right])s_{11}+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

$=\left[\begin{array}{cc}{h}_{11}& h_{12}\\ h_{21}& h_{22}\end{array}\right]\left[\begin{array}{c}{e}^{j{\mathrm{\&theta;}}_1}{w}_{11}\\ e^{j{\mathrm{\&theta;}}_2}{w}_{21}\end{array}\right]s_{11}+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

$=\left[\begin{array}{c}{h}_{11}{e}^{{\mathrm{j\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{12}{e}^{{\mathrm{j\&theta;}}_2}{w}_{21}\\ h_{21}{e}^{j{\mathrm{\&theta;}}_1}{\mathrm{<figure-callout\; id="11"\; label="w"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">w</figure-callout>}}_{11}+h_{22}{e}^{j{\mathrm{\&theta;}}_2}{w}_{21}\end{array}\right]s_{11}+H_{23}{W}_{33}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="HDA0000132888770000012.png,HDA0000132888770000021.png"\; state="\{\{state\}\}">s</figure-callout>}}_3$

UE minimizes and finds the solution the adjustment matrix V by calculating interference signal I=0 or I before sending data ₁

The uplink interference counteracting schematic diagram that Fig. 3 adjusts for having power among the present invention; This embodiment and embodiment one are similar, and difference is that UE can also carry out the power adjustment.For example, the UE3 among Fig. 3 has carried out the power adjustment.

This moment, the interference volume at UE1 and UE3 2 places in the base station was: I=H ₂₁(V ₁W ₁₁) s ₁+ H ₂₃(p ₃V ₃W ₃₃) s ₃

Owing to increased a power adjustment, interference cancellation has increased the degree of freedom, more helps interference cancellation.But can carry out the power adjustment, serving BS 3 service quality and the current channel condition information in the past that needs to consider UE3 be determined, for example determines according to the HARQ feedback information of data.

If UE1 and UE3 carry out the power adjustment simultaneously, then the interference volume at UE1 and UE3 2 places in the base station is at this moment: I=H ₂₁(p ₁V ₁W ₁₁) s ₁+ H ₂₃(p ₃V ₃W ₃₃) s ₃

In addition, in the uplink interference cancellation process, the channel condition information that UE1 and UE3 need obtain interference channel could calculate the adjustment matrix, obtains adjusting pre-coding matrix.

Under fdd mode shown in Figure 4, the method for the channel condition information of UE1 and UE3 acquisition interference channel is as follows:

UE1 can be to the up Sounding signal SRS1 of its serving BS 1 normal transmission, base station 2 also can receive SRS1, and, for example include but not limited to following content: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix according to the channel condition information that SRS1 estimates UE1 interference channel of 2 to the base station; Base station 2 is with the part or all of informing base station 1 of the channel condition information of the interference channel that obtains, and base station 1 is again by down channel notice UE1;

Same, UE3 can send up Sounding signal SRS3 to its serving BS 3 is normal, and base station 2 also can receive SRS3, and estimates the channel condition information of UE3 interference channel of 2 to the base station according to SRS3; Base station 2 is with the part or all of informing base station 3 of the channel condition information of the interference channel that obtains, and base station 3 is again by down channel notice UE3.

Under tdd mode shown in Figure 5, the method for the channel condition information of UE1 and UE3 acquisition interference channel is as follows:

Base station 2 can normally send the down channel measuring-signal to the UE2 of its service, for example channel state information reference signals CSI-RS2; UE1 and UE3 also can receive CSI-SRS2, UE1 estimates the channel condition information of base station 2 to UE1 according to CSI-SRS2, UE3 for example includes but not limited to following content: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix according to the channel condition information that CSI-SRS2 estimates base station 2 to UE3; UE1 is according to the up-downgoing channel reciprocity, obtains the channel condition information of UE1 interference channel of 2 to the base station, and UE3 is according to the up-downgoing channel reciprocity, obtains the channel condition information of UE3 interference channel of 2 to the base station.

Need to prove that above-mentioned Fig. 4 and embodiment shown in Figure 5 can make up with Fig. 2 and embodiment shown in Figure 3, form assembled scheme, repeat no more herein.

The method that corresponding above-mentioned uplink interference is offset, the terminal that the present invention also provides a kind of uplink interference to offset as shown in Figure 6, mainly comprises: first adjusting module 61 and first sending module 62.

Wherein, first adjusting module 61 is used to receive the precoding information that serving BS sends to terminal, according to terminal to the channel condition information between cooperative base station that obtains precoding information adjustment is obtained adjusting pre-coding matrix;

First sending module 62 is used for sending data according to adjusting pre-coding matrix to serving BS.

Preferable, under fdd mode, terminal to the channel condition information between cooperative base station is measured by cooperative base station; The channel condition information that cooperative base station measures is notified to terminal by serving BS, perhaps directly is notified to terminal.

Under tdd mode, first adjusting module 61 is measured the channel condition information of cooperative base station to terminal room, and determines that according to cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station.

First adjusting module 61 is further used for, and to the channel condition information between cooperative base station, from the precoding information of serving BS, determines to adjust matrix according to terminal; Perhaps, according to terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that terminal sends to serving BS to the channel condition information between serving BS, terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, pre-coding matrix is determined according to precoding information.

Wherein, terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix; Terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

First adjusting module 61 is further used for, one of at least carry out the power adjustment according to following information: from power control information, the HARQ feedback information of serving BS, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

Need to prove that in the above-described embodiments, adjustment matrix, adjustment pre-coding matrix are all determined in end side; As another kind of embodiment of the present invention, adjust and be notified to terminal after matrix or adjustment pre-coding matrix also can be determined by base station side, below this embodiment is elaborated.

The method that a kind of uplink interference that another embodiment of the present invention provided is offset as shown in Figure 7, mainly comprises:

Step 701, serving BS or cooperative base station are adjusted the precoding information that terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix, adjust pre-coding matrix and adjust pre-coding matrix information accordingly, and will adjust pre-coding matrix information and send to terminal.

When the operation of step 701 was carried out by serving BS, terminal was notified to serving BS after the channel condition information between cooperative base station is measured by cooperative base station;

When the operation of step 701 was carried out by cooperative base station, the precoding information that terminal adopts was notified to cooperative base station by serving BS, and the adjustment pre-coding matrix information that terminal receives sends to terminal by cooperative base station via serving BS.

Wherein, adjust pre-coding matrix=adjustment matrix * pre-coding matrix,

Adjusting matrix determines according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that terminal adopts, terminal send to serving BS to the channel condition information between serving BS, terminal to channel condition information between cooperative base station and following information.Identical in the method for solving of adjusting matrix and the previous embodiment, also be to minimize by calculating interference signal I=0 or I to find the solution, repeat no more herein.

Terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

Step 702, terminal is determined the corresponding pre-coding matrix of adjusting according to the adjustment pre-coding matrix information that receives, and according to sending data according to the adjustment pre-coding matrix of determining to serving BS.

Preferable, on basis embodiment illustrated in fig. 7, can also carry out the power adjustment, promptly adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix,

Wherein, power is adjusted matrix by serving BS or cooperative base station determining one of at least according to following information: from power control information, the HARQ feedback information of serving BS.

The base station that the method that uplink interference corresponding shown in Figure 7 is offset, the embodiment of the invention also provide a kind of uplink interference to offset, serving BS or cooperative base station for base station side as shown in Figure 8, mainly comprise: second adjusting module 81 and second sending module 82.

Second adjusting module 81 is used for according to terminal to the channel condition information between cooperative base station the precoding information that terminal adopts being adjusted, and obtains adjusting matrix, adjusts pre-coding matrix and adjusts pre-coding matrix information accordingly;

Second sending module 82 is used for adjustment pre-coding matrix information is sent to terminal, determines the corresponding pre-coding matrix of adjusting for terminal according to the adjustment pre-coding matrix information that receives, and sends data according to the adjustment pre-coding matrix of determining to serving BS.

The method that a kind of uplink interference that yet another embodiment of the invention provided is offset as shown in Figure 9, mainly comprises:

Step 901, serving BS or cooperative base station are adjusted the precoding information that terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix and adjust matrix information accordingly, and will adjust the precoding information that matrix information and terminal adopt and send to terminal.

When the operation of step 901 was carried out by serving BS, terminal was notified to serving BS after the channel condition information between cooperative base station is measured by cooperative base station;

When the operation of step 901 was carried out by cooperative base station, the precoding information that terminal adopts was notified to cooperative base station by serving BS, and the adjustment matrix information that terminal receives sends to terminal by cooperative base station via serving BS.

Step 902, terminal is determined corresponding pre-coding matrix according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to serving BS according to adjusting pre-coding matrix.

Adjust pre-coding matrix=adjustment matrix * pre-coding matrix,

Adjusting matrix determines according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that terminal adopts, terminal send to serving BS to the channel condition information between serving BS, terminal to channel condition information between cooperative base station and following information.Identical in the method for solving of adjusting matrix and the previous embodiment, also be to minimize by calculating interference signal I=0 or I to find the solution, repeat no more herein.

Terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

Preferable, on basis embodiment illustrated in fig. 9, can also carry out the power adjustment, promptly adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix,

Wherein, power is adjusted matrix and is sent to terminal by serving BS or cooperative base station according to behind the determining one of at least of following information: from power control information, the HARQ feedback information of serving BS, perhaps, by terminal determining one of at least: from power control information, the HARQ feedback information of serving BS according to following information.

The base station that the method that uplink interference corresponding shown in Figure 9 is offset, the embodiment of the invention also provide a kind of uplink interference to offset is serving BS or cooperative base station, as shown in figure 10, mainly comprises: adjust matrix determination module 1001 and the 3rd sending module 1002.

Adjust matrix determination module 1001, be used for the precoding information that terminal adopts being adjusted, obtain adjusting matrix and adjust matrix information accordingly according to terminal to the channel condition information between cooperative base station;

The 3rd sending module 1002, the precoding information that is used for adjusting the employing of matrix information and terminal sends to terminal; Determine corresponding pre-coding matrix for terminal according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to serving BS according to adjusting pre-coding matrix.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (24)

1. the method offset of a uplink interference is characterized in that this method comprises:

Terminal receives the precoding information from serving BS, according to described terminal to the channel condition information between cooperative base station that obtains described precoding information adjustment is obtained adjusting pre-coding matrix;

Terminal sends data according to described adjustment pre-coding matrix to described serving BS.

2. according to the method for the described uplink interference counteracting of claim 1, it is characterized in that this method further comprises:

Under the FDD pattern, terminal to the channel condition information between cooperative base station is measured by described cooperative base station; Described cooperative base station is notified to serving BS with the channel condition information that measures, and is notified to described terminal by serving BS; Perhaps described cooperative base station directly is notified to described terminal with the channel condition information that measures.

3. according to the method for the described uplink interference counteracting of claim 1, it is characterized in that this method further comprises:

Under the TDD pattern, described terminal is measured the channel condition information of cooperative base station to described terminal room, and determines that according to described cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station.

4. according to the method for claim 2 or 3 described uplink interference counteractings, it is characterized in that the terminal that described foundation is obtained to the channel condition information between cooperative base station obtains adjusting pre-coding matrix to precoding information adjustment, for:

Described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS, determines to adjust matrix according to described terminal; Perhaps, according to described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that described terminal sends to serving BS to the channel condition information between serving BS, described terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, described pre-coding matrix is determined according to precoding information.

5. the method for offsetting according to the described uplink interference of claim 4 is characterized in that,

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

6. according to the method for the described uplink interference counteracting of claim 4, it is characterized in that this method further comprises:

Described terminal is carried out one of at least the power adjustment according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

7. the terminal offset of a uplink interference is characterized in that this terminal comprises:

First adjusting module is used to receive the precoding information that serving BS sends to terminal, according to described terminal to the channel condition information between cooperative base station that obtains described precoding information adjustment is obtained adjusting pre-coding matrix;

First sending module is used for sending data according to described adjustment pre-coding matrix to described serving BS.

8. the terminal of offsetting according to the described uplink interference of claim 7 is characterized in that under the FDD pattern, described terminal to the channel condition information between cooperative base station is measured by described cooperative base station;

The channel condition information that described cooperative base station measures is notified to described terminal by serving BS, perhaps directly is notified to described terminal.

9. the terminal of offsetting according to the described uplink interference of claim 7, it is characterized in that, described first adjusting module is further used for, under the TDD pattern, measure the channel condition information of cooperative base station, and determine that according to described cooperative base station to the channel condition information of terminal room terminal is to the channel condition information between cooperative base station to described terminal room.

10. according to Claim 8 or the terminal offset of 9 described uplink interference, it is characterized in that described first adjusting module is further used for, to the channel condition information between cooperative base station, from the precoding information of serving BS, determine to adjust matrix according to described terminal; Perhaps, according to described terminal to the channel condition information between cooperative base station, from the precoding information of serving BS and following information one of at least, determine to adjust matrix: the data that described terminal sends to serving BS to the channel condition information between serving BS, described terminal;

Accordingly, adjust pre-coding matrix=adjustment matrix * pre-coding matrix, wherein, described pre-coding matrix is determined according to precoding information.

11. the terminal according to the described uplink interference of claim 10 is offset is characterized in that,

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

12. the terminal according to the described uplink interference of claim 10 is offset is characterized in that described first adjusting module is further used for,

One of at least carry out the power adjustment according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information and carry out the power adjustment, accordingly, adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix.

13. the method that uplink interference is offset is characterized in that this method comprises:

Serving BS or cooperative base station are adjusted the precoding information that described terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix, adjust pre-coding matrix and adjust pre-coding matrix information accordingly, and described adjustment pre-coding matrix information is sent to described terminal; Described terminal is determined the corresponding pre-coding matrix of adjusting according to the adjustment pre-coding matrix information that receives, and sends data according to the adjustment pre-coding matrix of determining to described serving BS;

Perhaps, serving BS or cooperative base station are adjusted the precoding information that described terminal adopts according to terminal to the channel condition information between cooperative base station, obtain adjusting matrix and adjust matrix information accordingly, and the precoding information of described adjustment matrix information and terminal employing is sent to described terminal; Described terminal is determined corresponding pre-coding matrix according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to described serving BS according to described adjustment pre-coding matrix.

14. the method according to the described uplink interference of claim 13 is offset is characterized in that this method further comprises:

When the precoding information that serving BS adopts described terminal according to the channel condition information of terminal between cooperative base station was adjusted, described terminal to the channel condition information between cooperative base station was notified to serving BS by cooperative base station.

15. the method according to the described uplink interference of claim 13 is offset is characterized in that this method further comprises:

When the precoding information that cooperative base station adopts described terminal according to the channel condition information of terminal between cooperative base station is adjusted, the precoding information that described terminal adopts is notified to cooperative base station by serving BS, and adjustment matrix information that described terminal receives or adjustment pre-coding matrix information send to terminal by cooperative base station via serving BS.

16. the method according to the described uplink interference of claim 13 is offset is characterized in that this method further comprises: adjust pre-coding matrix=adjustment matrix * pre-coding matrix,

Described adjustment matrix is determined according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that described terminal adopts, terminal send to serving BS to the channel condition information between serving BS, described terminal to channel condition information between cooperative base station and following information.

17. the method according to the described uplink interference of claim 16 is offset is characterized in that,

Described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

18. the method according to claim 16 or 17 described uplink interference counteractings is characterized in that this method further comprises: adjust pre-coding matrix=power and adjust matrix * adjustment matrix * pre-coding matrix,

Wherein, described power is adjusted matrix by terminal determining one of at least according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information; Perhaps, by serving BS or cooperative base station determining one of at least: from power control information, the HARQ feedback information of serving BS according to following information.

19. the base station that uplink interference is offset for serving BS or cooperative base station, is characterized in that,

This base station comprises: second adjusting module, be used for the precoding information that described terminal adopts being adjusted according to terminal to the channel condition information between cooperative base station, and obtain adjusting matrix, adjust pre-coding matrix and adjust pre-coding matrix information accordingly;

Second sending module, be used for described adjustment pre-coding matrix information is sent to described terminal, determine the corresponding pre-coding matrix of adjusting for described terminal according to the adjustment pre-coding matrix information that receives, and send data to described serving BS according to the adjustment pre-coding matrix of determining;

Perhaps comprise: adjust the matrix determination module, be used for the precoding information that described terminal adopts being adjusted, obtain adjusting matrix and adjust matrix information accordingly according to terminal to the channel condition information between cooperative base station;

The 3rd sending module is used for the precoding information of described adjustment matrix information and terminal employing is sent to described terminal; Determine corresponding pre-coding matrix for described terminal according to the precoding information that receives, determine the corresponding matrix of adjusting according to the adjustment matrix information that receives, with the adjustment matrix of determining the pre-coding matrix adjustment of determining is obtained adjusting pre-coding matrix, and send data to described serving BS according to described adjustment pre-coding matrix.

20. the base station according to the described uplink interference of claim 19 is offset is characterized in that when the base station that described uplink interference is offset was serving BS, described terminal to the channel condition information between cooperative base station was notified to serving BS by cooperative base station.

21. base station according to the described uplink interference counteracting of claim 19, it is characterized in that, when the base station that described uplink interference is offset is cooperative base station, the precoding information that described terminal adopts is notified to cooperative base station by serving BS, and adjustment matrix information that described terminal receives or adjustment pre-coding matrix information send to terminal by cooperative base station via serving BS.

22. the base station according to the described uplink interference of claim 19 is offset is characterized in that, adjusts pre-coding matrix=adjustment matrix * pre-coding matrix,

Described adjustment matrix is determined according to terminal to the channel condition information between cooperative base station; Perhaps, according to terminal determining one of at least: the data that the precoding information that described terminal adopts, terminal send to serving BS to the channel condition information between serving BS, described terminal to channel condition information between cooperative base station and following information.

23. the base station according to the described uplink interference of claim 22 is offset is characterized in that, described terminal to the channel condition information between cooperative base station comprise following one of at least: the right singular vector of channel coefficient matrix, channel correlation matrix, channel coefficient matrix;

Described terminal to the channel condition information between serving BS comprises: channel coefficient matrix.

24. the base station according to claim 22 or 23 described uplink interference counteractings is characterized in that, adjusts pre-coding matrix=power and adjusts matrix * adjustment matrix * pre-coding matrix,

Wherein, described power is adjusted matrix by terminal determining one of at least according to following information: from the power control information of serving BS, mix automatic repeat requests HARQ feedback information; Perhaps, by described base station determining one of at least according to following information: power control information, HARQ feedback information from serving BS are determined.

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