CN103378891B - Business transmitting method and system, user equipment and base station based on global precoding - Google Patents

Abstract

The present invention discloses a service transmission method and system based on global precoding, a user equipment, and a base station, wherein the service transmission method based on global precoding includes: the user equipment UE determines the distance between the UE and a serving cell or a coordinated cell global channel, and calculate the precoding matrix of the global channel, and feed back the precoding matrix to the serving cell; the serving cell shares the precoding matrix with the cooperative cell, and the serving cell and the cooperative The cell performs service transmission based on the precoding matrix. The UE obtains the precoding matrix through the joint diagonalization method, and the precoding matrix can be obtained only through one-time calculation of the UE. Moreover, the UE does not need the base station to issue relevant parameter signaling when analyzing the service, which can fully utilize The advantages of global precoding are not only avoided, but also the disadvantages of constructing a variety of different dimensional codebooks and poor flexibility are avoided. The above-mentioned technical solution of the present invention improves the data transmission rate and gain of cell edge users.

Description

Service transmission method and system, user equipment and base station based on global precoding

technical field

The present invention relates to global precoding technology, in particular to a service transmission method and system based on global precoding, user equipment and a base station.

Background technique

In order to improve the average throughput of the system and solve the problem of low throughput caused by cell edge interference, the Advanced Long Term Evolution system (LTE-Advance, Long Term Evolution Advance) introduces Coordinated Multipoint Transmission (CoMP, Coordinated multipoint transmission) and expands extensive discussion.

Coordinated multi-point technologies can be classified into two categories: joint processing (JP, Joint Process), joint scheduling (CS, Coordinated Scheduling) or joint beamforming (CB, Coordinated Beamforming). For JP, each node in the cooperative set can obtain data, and JP can be divided into joint transmission (JT, Joint Transmission) and dynamic cell switching (DCS, Dynamic Cell Switching); for CS/CB, only available in the serving cell The data is transmitted by the serving cell, but the scheduling of the user and the determination of the beam need to be jointly determined by multiple cells in the coordination set according to the channel conditions.

Among the CoMP transmission schemes currently under discussion, JP transmission methods are mainly divided into two categories: correlated cooperative transmission schemes and non-correlated cooperative transmission schemes. Among them, the relevant cooperative transmission schemes are divided into global precoding schemes, phase correction plus precoding schemes, beam forming (BF, Beam Forming) based precoding schemes, etc.; non-correlated cooperative transmission schemes are divided into independent precoding schemes. Coding scheme, transmission scheme based on Space Frequency Block Code (SFBC, Space Frequency Block Code), transmission scheme based on Cyclic Delay Diversity (CDD, Cyclic Delay Diversity), transmission scheme based on Single Frequency Network (SFN, Single Frequency Network), etc. Several kinds.

Among the above schemes, the global precoding scheme in the related transmission scheme combines and fully utilizes the channel information of multiple cells to obtain a precoding matrix, which has the advantages of large transmission gain and resistance to inter-cell interference, thereby improving cell edge performance. The existing Single User Multiple-Input-Multiple-Output (SU-MIMO, Single User Multiple-Input-Multiple-Output) scheme based on global precoding (global precoding) coordinated multi-point transmission, the basic idea is that the precoding matrix is based on all participating collaborative The channel formed between the cell and the user equipment calculates the precoding matrix, and each cell uses a part of the precoding matrix to perform the precoding operation. It can be seen that when the number of coordinated cells is different, the dimension of the formed channel will exist in various forms. Therefore, the problems of this scheme include: codebook sets of different dimensions need to be designed for various antenna configurations, and the flexibility is poor; due to the increase in the dimension of the matrix, the amount of feedback will be greatly increased for explicit feedback Increase.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a service transmission method and system based on global precoding, user equipment, and a base station, so that the UE can obtain the precoding matrix through one-time calculation, and feed back the precoding matrix to the base station side And save wireless resources.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A service transmission method based on global precoding, comprising:

The user equipment UE determines the global channel between the UE and the serving cell and the coordinated cell, calculates a precoding matrix of the global channel, and feeds back the precoding matrix to the serving cell;

The serving cell shares the precoding matrix with the coordinated cell, and the serving cell and the coordinated cell perform service transmission based on the precoding matrix.

Preferably, the UE determines the global channel between the UE and the serving cell and the coordinated cell as:

The UE measures the subchannels between the UE and the serving cell and between the UE and the coordinated cell by using the measurement pilot, and combines the subchannels into the global channel.

Preferably, the UE uses a joint diagonalization method to calculate the precoding matrix of the global channel.

Preferably, the feeding back the precoding matrix to the serving cell is:

sending the precoding matrix to the serving cell;

Alternatively, the index corresponding to the precoding matrix is sent to the serving cell, and the serving cell determines the corresponding precoding matrix according to the index of the precoding matrix.

Preferably, the serving cell shares the precoding matrix with the coordinated cell, which is:

The serving cell notifies the coordinated cell of the precoding matrix through an X2 interface.

Preferably, the service transmission performed by the serving cell and the coordinated cell based on the precoding matrix is:

The serving cell sends the service data to be sent to the UE to the coordinated cell, and the serving cell and the coordinated cell use the uniform precoding matrix to perform precoding on the service data to be sent to the UE Encode the operation, and send.

Preferably, the number of antennas of the base station to which the serving cell belongs and the number of antennas of the base station to which the coordinated cell belongs are equal to the number of receiving antennas of the UE.

Preferably, the method also includes:

The UE detects the control channel of the serving cell, and uses the conjugate transpose of the precoding matrix to analyze the service data according to the indication of the control channel.

A service transmission system based on global precoding, including a serving cell, a coordinated cell, and a UE, wherein:

The UE is configured to determine a global channel between the UE, a serving cell, and a coordinated cell, calculate a precoding matrix of the global channel, and feed back the precoding matrix to the serving cell;

The serving cell is configured to share the precoding matrix with the coordinated cell, cooperate with the coordinated cell, and perform service transmission based on the precoding matrix.

Preferably, the UE is further configured to use measurement pilots to measure sub-channels between the UE and the serving cell, and between the UE and the coordinated cell, respectively, and combine the sub-channels into the global channel.

Preferably, the UE is further configured to use a joint diagonalization method to calculate the precoding matrix of the global channel.

Preferably, the UE is further configured to send the precoding matrix to the serving cell;

Alternatively, the UE is further configured to send the index corresponding to the precoding matrix to the serving cell, and the serving cell is further configured to determine a corresponding precoding matrix according to the index of the precoding matrix.

Preferably, the serving cell is further configured to send service data to be sent to the UE to the coordinated cell;

The serving cell and the cooperating cell are further configured to perform a precoding operation on the service data to be sent to the UE using the unified precoding matrix, and send the same.

Preferably, the number of antennas of the base station to which the serving cell belongs and the number of antennas of the base station to which the coordinated cell belongs are equal to the number of receiving antennas of the UE.

Preferably, the UE is further configured to detect a control channel of the serving cell, and use the conjugate transpose of the precoding matrix to analyze service data according to an indication of the control channel.

A user equipment, comprising a determination unit, a calculation unit and a feedback unit, wherein:

a determining unit, configured to determine a global channel between the UE and a serving cell or a coordinated cell;

a calculation unit, configured to calculate the precoding matrix of the global channel;

a feedback unit, configured to feed back the precoding matrix to a serving cell.

Preferably, the user equipment further includes a detection unit and an analysis unit, wherein:

a detection unit, configured to detect a control channel of the serving cell;

The analysis unit is configured to use the conjugate transpose of the precoding matrix to analyze the service data according to the instruction of the control channel.

Preferably, the determining unit is further configured to measure subchannels between the UE and the serving cell, and between the UE and the coordinated cell by using measurement pilots, and combine the subchannels into the global channel .

Preferably, the feedback unit is further configured to send the precoding matrix to the serving cell;

Alternatively, the feedback unit is further configured to send the index corresponding to the precoding matrix to the serving cell, so that the serving cell determines the corresponding precoding matrix according to the index of the precoding matrix.

A base station comprising a receiving unit, a sharing unit and a transmitting unit, wherein:

The receiving unit is used to receive the precoding matrix of the global channel of the serving cell and the coordinated cell sent by the UE;

a sharing unit, configured to share the precoding matrix with the coordinated cell;

A transmission unit, configured to perform service transmission based on the precoding matrix.

In the present invention, the UE obtains the precoding matrix through the joint diagonalization method, and the precoding matrix can be obtained only through one-time calculation of the UE, and the UE does not need the base station to issue relevant parameter signaling when parsing services , which not only makes full use of the advantages of global precoding, but also avoids the disadvantages of constructing various dimensional codebooks and poor flexibility. The above-mentioned technical solution of the present invention improves the data transmission rate and gain of cell edge users. CoMP joint transmission can be realized through fast calculation and explicit feedback of the joint precoding matrix by the UE instead of channel information, and the joint precoding matrix obtained by making full use of the channel state information can obtain more gains at the receiving end. As the number of cells increases, the amount of feedback does not increase, and the computational complexity does not increase significantly. When analyzing services, the serving cell does not need to issue a precoding matrix, but the precoding matrix calculated by the UE itself is used for service analysis, which not only avoids interference between cells, but also improves the performance of users participating in the cooperation at the edge of the cell.

Description of drawings

FIG. 1 is a flowchart of a service transmission method based on global precoding according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an application of a service transmission method based on global precoding according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a composition structure of a base station according to an embodiment of the present invention.

detailed description

The basic idea of the present invention is: the UE determines the global channel between the UE, the serving cell and the coordinated cell, calculates the precoding matrix of the global channel, and feeds back the precoding matrix to the serving cell; the serving cell shares the precoding matrix with the coordinated cell , the serving cell and the coordinated cell perform service transmission based on the precoding matrix.

In order to make the purpose, technical solutions and advantages of the present invention more clear, the following examples are given and the accompanying drawings are given to further describe the present invention in detail.

Fig. 1 is a flowchart of a service transmission method based on global precoding according to an embodiment of the present invention. As shown in Fig. 1 , the service transmission method based on global precoding in this example includes the following steps:

Step S101: the user equipment obtains channel information H _i from each cell to the user equipment through measurement pilot measurement, and calculates a precoding matrix for joint precoding.

Before executing step S101, it is necessary to configure the cooperative cell in the communication system, and at the same time configure the measurement pilot of the cooperative cell; where the measurement pilots are mutually orthogonal in the configuration of the cooperative cell, and the configuration of the cooperative cell can be static or semi-static. still. The measurement pilot may be a Channel State Information-Reference Signal (CSI-RS, Channel State Information-Reference Signal).

The UE measures channels between the serving cell, the coordinated cell and the UE respectively through the measurement pilot. Specifically, channel estimation can be performed by obtaining CSI-RS. The measured content includes the subchannels corresponding to each coordinated cell (including the serving cell of the UE) to the CoMP user equipment, and then all the measured subchannels form a relative CoMP user equipment is a transparent global channel, and then the CoMP UE uses the non-unitary joint diagonalization method to find a non-unitary matrix W, so that W ^H HW is a block diagonalization matrix. It should be noted that the method of non-unitary joint diagonalization belongs to the prior art, and the details of its implementation will not be repeated in this example. For example, you can refer to the article "A Method of Non-unitary Joint Diagonalization for Estimation of Two-Dimensional Arrival Direction" (Authors: Nie Weike, Feng Dazheng, Liu Jianqiang) in "Journal of Xi'an Jiaotong University" No. 06, 2008.

It should be noted that it is an existing technology for the UE to measure the channels from itself to each coordinated cell (including the serving cell of the UE) by using the measurement pilot, and it is also easy to implement. In this example, the implementation details of the channel measurement will not be repeated. The above measurement pilots may be configured in the UE after the coordinated cells are configured, or may be obtained by the UE from the base station to which each coordinated cell belongs. Obtaining the measurement pilot by the UE from the base station to which each coordinated cell belongs belongs to the prior art, and details of its implementation will not be repeated here.

Step S102: the user equipment feeds back the joint precoding matrix W to the serving cell.

The CoMP user equipment feeds back W to the serving cell, and the feedback manner may be periodic or aperiodic, and the specific manner may be configured by the base station.

It should be noted that when feeding back the precoding matrix W to the serving base station to which the serving cell belongs, W can be directly fed back to the serving base station, or the indexes of various joint precoding matrices can be set in advance, and when the UE calculates W, Select the precoding matrix corresponding to the calculated W, notify the index of the corresponding precoding matrix to the serving base station, and the serving base station determines the corresponding precoding matrix according to the received index, so as to realize the precoding matrix feedback.

Step S103: The serving cell shares the joint precoding matrix W fed back by the user equipment among the set of CoMP cooperating cells.

The serving base station to which the serving cell belongs receives the joint precoding matrix W fed back by the user equipment, and shares it among the CoMP cooperating cells through the X2 interface. That is to say, since the serving base station to which the serving cell belongs and the base stations to which the coordinated cells of the serving cell belong are not necessarily the same base station, it is necessary to realize the sharing of the joint precoding matrix W through the interface between the base stations in order to realize the CoMP service transmission.

Step S104: Each coordinated cell uses a unified joint precoding matrix to precode the jointly transmitted service and transmit it.

Each coordinated cell (including the serving cell of the UE) uses a unified joint precoding matrix to perform a precoding operation on the service data to be sent to the CoMP user equipment, and sends it. In the case of obtaining the joint precoding matrix, it is easy to implement the corresponding encoding of the service data, and this example will not repeat the specific implementation manner of the encoding.

Step S105: the user equipment uses the calculated joint precoding matrix to analyze service data.

The CoMP user equipment detects the control channel of the serving cell, and uses the conjugate transpose of the precoding matrix to analyze the service data according to the indication of the control channel. Specifically, the CoMP user equipment multiplies the received service data by the conjugate transpose of the joint precoding matrix W calculated in step S101 to obtain a block diagonal matrix multiplied by the service of each cell, and then simply Parse the business data sent by the sender.

It should be noted that, in this example, the number of antennas of the base station to which the serving cell belongs and the number of antennas of the base station to which the coordinated cell belongs are equal to the number of receiving antennas of the UE.

In the present invention, the UE obtains the precoding matrix through the joint diagonalization method, and the precoding matrix can be obtained only through one-time calculation of the UE, and the UE does not need the base station to issue relevant parameter signaling when parsing services , which not only makes full use of the advantages of global precoding, but also avoids the disadvantages of constructing various dimensional codebooks and poor flexibility. The above-mentioned technical solution of the present invention improves the data transmission rate and gain of cell edge users. CoMP joint transmission can be realized through fast calculation and explicit feedback of the joint precoding matrix by the UE instead of channel information, and the joint precoding matrix obtained by making full use of the channel state information can obtain more gains at the receiving end. As the number of cells increases, the amount of feedback does not increase, and the computational complexity does not increase significantly. When analyzing services, the serving cell does not need to issue a precoding matrix, but the precoding matrix calculated by the UE itself is used for service analysis, which not only avoids interference between cells, but also improves the performance of users participating in the cooperation at the edge of the cell.

Figure 2 is a schematic diagram of the application of the service transmission method based on global precoding according to the embodiment of the present invention. illustrate. For the user equipment, two cells are considered to be measured, the serving cell is Cell#0 (for simplicity, the cell with the cell ID n is described as Cell#n), and the other measurement cells are Cell#1.

The user equipment performs channel measurement, respectively obtains the channels H ₀ and H ₁ of the serving cell and the coordinated cell, and obtains the global channel matrix H=[H ₀ , H ₁ ] according to the channels H ₀ and H ₁ , where the square brackets indicate the channel H ₀ , H ₁ are combined, and the combination method is horizontal arrangement; then the matrix W is calculated using the joint diagonalization algorithm, so that W ^H HW is a block diagonalization matrix, that is, H ₁ =WΛ ₁ W ^H , H ₁ =WΛ ₁ W ^H , the matrix W is the joint precoding matrix. Wherein, W ^H represents the transpose of matrix W, and Λ ₀ and Λ ₁ are the diagonalized matrices of channels H ₀ and H ₁ respectively.

The user equipment feeds back the joint precoding matrix W to the serving cell.

The serving cell Cell# ₀ receives the W fed back by the user equipment, and shares it with Cell#1 in the CoMP coordinated cell. The business data received in is _denoted by S1.

The main serving cell Cell#0 and the cooperative cell Cell#1 uniformly precode the data to be sent to the user equipment into: WS ₀ , WS ₁ , and send the data to the user equipment.

The user equipment multiplies the received data HWS (S includes S ₀ and S ₁ ) by the matrix W ^H to the left to obtain a form in which a block diagonalized matrix is multiplied by the service: For the user equipment, it does not know which base station sends the service data, and the transmission of the service data is transparent to the user equipment. In this embodiment, the number of antennas of Cell#0 and Cell#1 is the same, and Equal to the number of receiving antennas of the UE.

The present invention also records a service transmission system based on global precoding, including a serving cell, a coordinated cell, and a UE, wherein:

The UE is used to determine the global channel between the UE and the serving cell and the coordinated cell, calculate the precoding matrix of the global channel, and feed back the precoding matrix to the serving cell;

The serving cell is configured to share the precoding matrix with the cooperating cell, cooperate with the cooperating cell, and perform service transmission based on the precoding matrix.

The above-mentioned UE is also used to measure the sub-channels between the UE and the serving cell and between the UE and the coordinated cell by using the measurement pilot, and combine the sub-channels into a global channel.

The above-mentioned UE is also used to calculate the precoding matrix of the global channel by using the method of joint diagonalization.

The above UE is also used to send the precoding matrix to the serving cell;

Alternatively, the UE is further configured to send the index corresponding to the precoding matrix to the serving cell, and the serving cell is further configured to determine the corresponding precoding matrix according to the index of the precoding matrix.

The above serving cell is also used to send the service data to be sent to the UE to the coordinated cell;

The serving cell and the coordinating cell are also used to perform a precoding operation on the service data to be sent to the UE using a unified precoding matrix, and send it.

The serving cell notifies the coordinated cell of the precoding matrix and the service data to be sent to the UE through the X2 interface.

The number of antennas of the base station to which the serving cell belongs and the number of antennas of the base station to which the coordinated cell belongs are equal to the number of receiving antennas of the UE.

The above-mentioned UE is further configured to detect a control channel of the serving cell, and use the conjugate transpose of the precoding matrix to analyze service data according to the indication of the control channel.

The functions implemented by the UE, the serving cell, and the coordinated cell in the above-mentioned service transmission system based on global precoding can be understood by referring to the relevant description in the service transmission method based on global precoding. The service transmission system based on the global precoding of the present invention only improves the relevant functions of the UE and the base station, and does not change the network structure in the communication system.

In the service transmission system based on the global precoding of the present invention, the UE obtains the precoding matrix through the joint diagonalization method, and the precoding matrix can be obtained only through one-time calculation of the UE, and the UE does not need The base station issues relevant parameter signaling, which not only makes full use of the advantages of global precoding, but also avoids the disadvantages of poor flexibility due to the construction of various dimensional codebooks. The above-mentioned technical solution of the present invention improves the data transmission rate and gain of cell edge users. CoMP joint transmission can be realized through fast calculation and explicit feedback of the joint precoding matrix by the UE instead of channel information, and the joint precoding matrix obtained by making full use of the channel state information can obtain more gains at the receiving end. As the number of cells increases, the amount of feedback does not increase, and the computational complexity does not increase significantly. When analyzing services, the serving cell does not need to issue a precoding matrix, but the precoding matrix calculated by the UE itself is used for service analysis, which not only avoids interference between cells, but also improves the performance of users participating in the cooperation at the edge of the cell.

FIG. 3 is a schematic diagram of the composition and structure of a user equipment according to an embodiment of the present invention. As shown in FIG. 3 , the user equipment in this example includes a determination unit 30, a calculation unit 31, and a feedback unit 32, wherein:

A determining unit 30, configured to determine a global channel between the UE and a serving cell or a coordinated cell;

A calculation unit 31, configured to calculate the precoding matrix of the global channel;

The feedback unit 32 is configured to feed back the precoding matrix to the serving cell.

On the basis of the user equipment shown in Figure 3, the user equipment in this embodiment of the present invention further includes a detection unit (not shown in Figure 3) and an analysis unit (not shown in Figure 3), wherein:

a detection unit, configured to detect a control channel of the serving cell;

The analysis unit is configured to use the conjugate transpose of the precoding matrix to analyze the service data according to the instruction of the control channel.

The determining unit 30 is further configured to measure subchannels between the UE and the serving cell, and between the UE and the coordinated cell by using measurement pilots, and combine the subchannels into the global channel.

The feedback unit 32 is further configured to send the precoding matrix to the serving cell;

Alternatively, the above feedback unit is further configured to send the index corresponding to the precoding matrix to the serving cell, so that the serving cell determines the corresponding precoding matrix according to the index of the precoding matrix.

In this example, the number of antennas of the base station to which the serving cell belongs and the number of antennas of the base station to which the coordinated cell belongs are equal to the number of receiving antennas of the user equipment.

Those skilled in the art should understand that the implementation functions of each processing unit in the user equipment shown in FIG. 3 can be understood by referring to the relevant description of the service transmission method based on global precoding. Those skilled in the art should understand that the functions of each processing unit in the user equipment shown in FIG. 3 may be implemented by a program running on a processor, or may be implemented by a specific logic circuit.

FIG. 4 is a schematic diagram of the composition and structure of a base station according to an embodiment of the present invention. As shown in FIG. 4 , the base station according to this embodiment of the present invention includes a receiving unit 40, a sharing unit 41, and a transmission unit 42, wherein:

The receiving unit 40 is configured to receive the precoding matrix of the global channel of the serving cell and the coordinated cell sent by the UE;

A sharing unit 41, configured to share the precoding matrix with the coordinated cell;

The transmission unit 42 is configured to perform service transmission based on the precoding matrix.

The above-mentioned sharing unit 41 shares the precoding matrix with the coordinated cell through the X2 interface.

The above-mentioned sharing unit 41 also shares the service data to be sent to the UE with the coordinated cell, and the transmission unit 42 uses the unified preset The encoding matrix is pre-encoded and sent by the transmission unit 42 .

Those skilled in the art should understand that the implementation functions of each processing unit in the base station shown in FIG. 4 can be understood by referring to the relevant description of the service transmission method based on the global precoding. Those skilled in the art should understand that the functions of each processing unit in the base station shown in FIG. 4 may be implemented by a program running on a processor, or may be implemented by a specific logic circuit.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (20)

1. a kind of business transmitting method based on global precoding, it is characterised in that methods described includes：

User equipment (UE) determines the global channel between the UE and serving cell, cooperation cell, and calculates the global channel Pre-coding matrix, by the precoding matrix feedback to serving cell；

The serving cell shares the pre-coding matrix and the cooperation cell, the serving cell and the cooperation cell Business transmission is carried out based on the pre-coding matrix；

UE carries out business datum parsing using the pre-coding matrix having calculated that.

2. according to the method for claim 1, it is characterised in that the UE determines the UE and serving cell, cooperation cell Between global channel, be：

The UE utilizations measure pilot tone and measured respectively between the UE and the serving cell, the UE and the cooperation cell Subchannel, each subchannel is merged into the global channel.

3. according to the method for claim 1, it is characterised in that the UE is calculated described complete using the method for Joint diagonalization The pre-coding matrix of office's channel.

4. according to the method for claim 1, it is characterised in that it is described by the precoding matrix feedback to serving cell, For：

The pre-coding matrix is sent to the serving cell；

Or index corresponding to the pre-coding matrix is sent to the serving cell, the serving cell is according to described pre- Pre-coding matrix corresponding to the index determination of encoder matrix.

5. according to the method for claim 1, it is characterised in that the serving cell is by the pre-coding matrix and the association Shared as cell, be：

The serving cell is notified the pre-coding matrix to the cooperation cell by X2 interface.

6. according to the method for claim 1, it is characterised in that the serving cell and the cooperation cell are based on described pre- Encoder matrix carries out business transmission, is：

The business datum that the serving cell is intended to be sent to the UE is sent to the cooperation cell, the serving cell and institute The pre-coding matrix for stating the business datum use unification that cooperation cell is intended to be sent to the UE carries out pre-encode operation, and Send.

7. according to the method for claim 1, it is characterised in that the number of antennas of the serving cell own base station and institute The number of antennas for stating cooperation cell own base station is equal with the reception antenna number of the UE.

8. the method according to claim 1 or 7, it is characterised in that methods described also includes：

The UE detects the control channel of the serving cell, according to the instruction of control channel, uses the pre-coding matrix Conjugate transposition parses business datum.

9. a kind of service transmission system based on global precoding, it is characterised in that the system is small including serving cell, cooperation Area and UE, wherein：

UE, for determining the global channel between the UE and serving cell, cooperation cell, and calculate the pre- of the global channel Encoder matrix, by the precoding matrix feedback to serving cell；

Serving cell, for the pre-coding matrix and the cooperation cell to be shared, cooperated with the cooperation cell, based on institute State pre-coding matrix and carry out business transmission；

UE, it is additionally operable to carry out business datum parsing using the pre-coding matrix having calculated that.

10. system according to claim 9, it is characterised in that the UE is additionally operable to, and institute is measured respectively using pilot tone is measured The subchannel between UE and the serving cell, the UE and the cooperation cell is stated, each subchannel is merged into the overall situation Channel.

11. system according to claim 9, it is characterised in that the UE is additionally operable to, and utilizes the method meter of Joint diagonalization Calculate the pre-coding matrix of the global channel.

12. system according to claim 9, it is characterised in that the UE is additionally operable to, and the pre-coding matrix is sent to The serving cell；

Or the UE is additionally operable to, index corresponding to the pre-coding matrix is sent to the serving cell, the service is small Area is additionally operable to, the pre-coding matrix according to corresponding to determining the index of the pre-coding matrix.

13. system according to claim 9, it is characterised in that the serving cell is additionally operable to, and is intended to be sent to the UE Business datum be sent to the cooperation cell；

The serving cell, cooperation cell are additionally operable to, and the business datum for being intended to be sent to the UE prelists using described in unification Code matrix carries out pre-encode operation, and sends.

14. system according to claim 9, it is characterised in that the number of antennas of the serving cell own base station and The number of antennas of the cooperation cell own base station and the reception antenna number of the UE are equal.

15. the system according to claim 9 or 14, it is characterised in that the UE is additionally operable to, and detects the serving cell Control channel, according to the instruction of control channel, business datum is parsed using the conjugate transposition of the pre-coding matrix.

A kind of 16. user equipment, it is characterised in that the user equipment includes determining unit, computing unit and feedback unit, its In：

Determining unit, for determining the global channel between UE and serving cell, cooperation cell；

Computing unit, for calculating the pre-coding matrix of the global channel；

Feedback unit, for by the precoding matrix feedback to serving cell；

Resolution unit, for carrying out business datum parsing using the pre-coding matrix having calculated that.

17. user equipment according to claim 16, it is characterised in that the user equipment also includes detection unit and conciliate Unit is analysed, wherein：

Detection unit, for detecting the control channel of the serving cell；

Resolution unit, for the instruction according to control channel, business datum is parsed using the conjugate transposition of the pre-coding matrix.

18. the user equipment according to claim 16 or 17, it is characterised in that the determining unit is additionally operable to, and utilizes survey Amount pilot tone measures the subchannel between the UE and the serving cell, the UE and the cooperation cell respectively, by each sub- letter Road is merged into the global channel.

19. the user equipment according to claim 16 or 17, it is characterised in that the feedback unit is additionally operable to, by described in Pre-coding matrix is sent to the serving cell；

Or the feedback unit is additionally operable to, index corresponding to the pre-coding matrix is sent to the serving cell, makes institute State serving cell pre-coding matrix according to corresponding to determining the index of the pre-coding matrix.

A kind of 20. base station, it is characterised in that the base station includes receiving unit, shared cell and transmission unit, wherein：

Receiving unit, for receiving the pre-coding matrix of the serving cell of UE transmissions and the global channel of cooperation cell；

Shared cell, for the pre-coding matrix and the cooperation cell to be shared；

Transmission unit, for carrying out business transmission based on the pre-coding matrix.