CN102075294B - One kind cooperation method for precoding and system - Google Patents
One kind cooperation method for precoding and system Download PDFInfo
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- CN102075294B CN102075294B CN201110005872.3A CN201110005872A CN102075294B CN 102075294 B CN102075294 B CN 102075294B CN 201110005872 A CN201110005872 A CN 201110005872A CN 102075294 B CN102075294 B CN 102075294B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
Abstract
The invention discloses one kind cooperation method for precoding, cooperative information exchange method and system.Include the first user terminal that the first base station of first community ownership and first community are serviced, the second user terminal that the second base station of second community ownership and second community are serviced in systems；On same section of running time-frequency resource, the first base station sends data to first terminal after first community carries out precoding using the first precoding weights to the symbol to be launched of the first user terminal；Second base station sends data to second terminal after second community carries out precoding using the second precoding weights to the symbol to be launched of second user terminal；The first precoding weights and the second precoding weights are orthogonality relation.The present invention uses orthogonal cooperation precoding in minizone, achievees the purpose that interference eliminates using the orthogonality of reception space.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of cooperation method for precoding, cooperative information interaction side
Method and system.
Background technology
In wireless communication system, the edge of cell (CELL) can receive the letter of multiple cells outside serving cell
Number, form stronger interference.Be now placed in the receiving terminal of cell edge received wireless signal SINR (Signal
The power ratio of Interference Noise Ratio, signal and interference noise) it is relatively low, therefore the use in cell edge
The transmission performance at family can be poor.
As shown in Figure 1, give the schematic diagram of a scenario that Cell Edge User is interfered.In a wireless communication system, respectively
When cell/base station uses identical time-frequency domain resources location transmission data, due to base station 2 (eNodeB 2), to issue its service small
The signal of the user terminal UE2 of area edge is possible to can be to the user terminal at the serving cell edge of base station 1 (eNodeB 1)
UE1 forms interference, and user terminal UE1 can be subject to the relatively strong jamming from eNodeB2 signals.Similarly, correspondingly eNodeB1 is issued
The signal of the user terminal UE1 at its serving cell edge is also possible to can be to the cell edge user terminal of eNodeB2 services
UE2 is formed compared with strong jamming.
In the 4th generation wireless telecommunication system (4G), such as third generation partner program (3rd Generation
Partnership Project, 3GPP) Long Term Evolution (Long Term Evolution, LTE) standard, due to using just
Frequency division multiplexing (OFDM) technology of friendship, it is very sensitive to interference effect, compare so the performance issue of the user of cell edge seems
It is prominent.In standard evolution process, the demand proposed to the spectrum efficiency of cell edge is higher and higher, but does not have but in the prior art
There is good method to solve interference problem.
For example, a kind of prior art is to solve interference problem by the scheduling of time domain or frequency domain, this technology is commonly referred to as
For cooperative scheduling technology.Simple cooperative scheduling technology can pass through the interaction of information between cell/base station so that cell edge
User avoids being transmitted in same running time-frequency resource position at the same time with the user of cell edge as far as possible.In Fig. 1, user terminal
UE1 and UE2 present positions are more close, therefore easily occur compared with strong jamming under the interference scene shown in Fig. 1, adjusted using cooperation
Degree technology can alleviate interference problem to a certain extent.But under the scene shown in Fig. 2, there is UE1, UE2, eNodeB2 same
The situation of one straight line, three is in same straight line or during close to same straight line, the correlated channels in channel there are direct projection (LOS) footpath
In the case of, the signal that UE2 is issued due to eNodeB2 is possible to can not also have complete attenuation when reaching UE1, also stronger
Jamming power reaches, therefore UE1 still is possible to be subject to the relatively strong jamming from eNB2.Therefore, cooperative scheduling technology passes through
Cell edge interference problem is not can solve in the coordination of time-frequency domain.
For example, another prior art is shaped by the cooperative beam in spatial domain to solve interference problem, what it was applied shows
Scene of anticipating is as shown in Figure 3.The cooperative beam shaping in the spatial domain, mainly according to channel information, come carry out the coordination of wave beam (
It is properly termed as cooperation precoding).This technology can preferably eliminate interference, it depends on the channel information of UE1 to eNodeB2
Feedback adds the feedback quantity of up channel, it is necessary to feed back the channel information of each frequency domain sub-band (Subband)；Also, due to
In cell edge, the feedback accuracy of user can also be affected.
Therefore, it is existing based on spatial domain interference eliminate cooperative beam forming technique there are the problem of include：(1) it is opposite
In single cell conditions, UE needs to feed back extra channel information, it is impossible to and accomplish that pattern is transparent, and need to design new pattern,
For the Standard Edition completed, it is impossible to support the technology；(2) need to increase extra up channel feedback overhead；(3)
Due in cell edge, UE1 measurement eNodeB2 and during channel between it can bring certain channel estimation errors, its
Quantify to also bring along certain error during the channel information estimated fed back；(4) eNodeB2 needs to ensure to transmit UE2
UE1 is not interfered with again while quality, it is necessary to which this 2 channels have preferable orthogonality, so needing to select in scheduling
Suitable UE2 is selected, therefore the limitation necessarily dispatched can be brought.
The content of the invention
The technical problems to be solved by the invention are, there is provided one kind cooperation method for precoding, cooperative information exchange method
And system, for solving the interference problem between neighbor cell.
To solve the above-mentioned problems, the present invention proposes a kind of mobile communication system using cooperation precoding, including：The
The first base station and the first user terminal for being serviced of first community of one cell ownership, the second base station of second community ownership and the
The second user terminal that two cells are serviced；Wherein, on same section of running time-frequency resource, the first base station is used in first community
First precoding weights send data to first terminal after carrying out precoding to the symbol to be launched of the first user terminal；Described
Two base stations are sent after second community carries out precoding using the second precoding weights to the symbol to be launched of second user terminal
Data are to second terminal；The first precoding weights and the second precoding weights are orthogonality relation.
Further, the first base station and the second base station are same base station or different base stations, i.e., described first community
Belong to same base station with second community or belong to different base stations.
Further, the first precoding weightsThe second precoding weightsIts
In, ua, ubRespectively oneVector or matrix, NtFor transmitting antenna number, m be less than or equal toPositive integer, α
For any real number or plural number.
Further, the uaAnd ubIt is identical or different vector or matrix.Further, the uaAnd ubFor just
Friendship relation.
Further, the first precoding weights and the second precoding weights are 8 antenna stack 1 in LTE-A standards respectively
Code word in code book；
Or respectively it is code word in LTE/LTE-A standards in 4 antenna stack, 1 code book；
Either extract what one or more columns per page was obtained respectively in one code word of 8 antenna stack, 4 code book from LTE-A standards
Mutually orthogonal matrix；
Or respectively be setIn mutually orthogonal two values.
Further, the first community is partly or entirely being passed by the first base station that it belongs to second community feedback
Precoding information on defeated resource location；And/or the second community is fed back by the second base station that it belongs to first community
The precoding information on the transfer resource identical or different with first community.
Further, the precoding information is quantified using precoding codebook, is included the use of and precoding codebook pair
The codewords indexes information answered represents the precoding information；Alternatively, the precoding information is quantified using parameter code book, bag
Include：First community and second community agreement precoding model, and use parameter reference information quantization mould corresponding with parameter code book
Parameter in type.
The present invention also provides a kind of method of the cooperation precoding in mobile communication system, what is belonged to including first community
The first user terminal that first base station and first community are serviced, the second base station of second community ownership and second community are serviced
Second user terminal mobile communication system in, this method includes：
On same section of running time-frequency resource, first base station is in first community using the first precoding weights to the first user terminal
Symbol to be launched carry out precoding after send data to first terminal；Second base station prelists code weight in second community using second
Value sends data to second terminal after carrying out precoding to the symbol to be launched of second user terminal；The first precoding weights
It is orthogonality relation with the second precoding weights.
The first base station and the second base station are same base station or different base stations, i.e., described first community and second community
Belong to same base station or belong to different base stations.
The first precoding weightsThe second precoding weightsWherein, ua, ubPoint
Wei not be oneVector or matrix, NtFor transmitting antenna number, m be less than or equal toPositive integer, α is any reality
Number or plural number.
The uaAnd ubIt is identical or different vector or matrix.The uaAnd ubFor orthogonality relation.
First precoding weights and the second precoding weights are in LTE-A standards in 8 antenna stack, 1 code book respectively
Code word；
Or respectively it is code word in LTE/LTE-A standards in 4 antenna stack, 1 code book；
Either extract what one or more columns per page was obtained respectively in one code word of 8 antenna stack, 4 code book from LTE-A standards
Mutually orthogonal matrix；
Or respectively be setIn mutually orthogonal two values.
The first community is fed back in part or all of transfer resource position by the first base station that it belongs to second community
The precoding information put；And/or the second community is fed back with first by the second base station that it belongs to first community
Precoding information on the identical or different transfer resource of cell.
The precoding information is quantified using precoding codebook, includes the use of code word rope corresponding with precoding codebook
Fuse breath represents the precoding information；Alternatively, the precoding information is quantified using parameter code book, including：First is small
Area and second community agreement precoding model, and use the ginseng in parameter reference information quantization model corresponding with parameter code book
Number.
The present invention also provides a kind of exchange method of minizone cooperative information, apply in first belonged to including first community
The first user terminal that base station and first community are serviced, the second base station of second community ownership and second community serviced the
In the mobile communication system of two user terminals, which includes：
The first community is fed back in part or all of transfer resource position by the first base station that it belongs to second community
The precoding information put；And/or
The second community is fed back in part or all of transfer resource position by the second base station that it belongs to first community
The precoding information put.
The method is further included：The precoding information that the second community is fed back according to first community cooperate pre-
Coding；And/or the precoding information that the first community is fed back according to second community carries out cooperation precoding.
The precoding information is quantified using precoding codebook, includes the use of code word rope corresponding with precoding codebook
Fuse breath represents the precoding information；Alternatively, the precoding information is quantified using parameter code book, including：First is small
Area and second community agreement precoding model, and use the ginseng in parameter reference information quantization model corresponding with parameter code book
Number.
The precoding information carries out quantization using precoding codebook and further includes：Prelist using described in the instruction of layer configured information
Code code book or parameter code book.
When the first community and/or second community send precoding information, represent that pre-coded index is believed using N number of bit
Breath or parameter reference information.
When the first community and/or second community send precoding information, the model arranged isα
=1, -1, j,-j, the first community and/or second community inform that the parameter a of cooperation part model F (α) believes using 2 bits
Breath.
When the first community and/or second community send precoding information, the model that is limited as
α=1, -1, j,-j, the first community and/or second community are using the method for codebook quantification respectively to model F's (α, u)
Cooperation part is informed after parameter a, u information quantization.
When the first community and/or second community send precoding information, 4 antennas of LTE-A or 8 antenna codebooks are used
Or its subset quantifies precoding information, and inform the corresponding index information of cooperation part.
The prior art is to carry out interference signal force zero based on interference channel information, is connect as far as possible so that not interfering with signal and reaching
Receiving end, and the present invention then uses orthogonal cooperation precoding in minizone, is disappeared using the orthogonality of reception space to reach interference
The purpose removed, it is allowed to disturb noise to reach receiving terminal, since cooperation precoding causes the signal from different districts receiving sky
Between there is orthogonality, receive when extract useful signal while, due to orthogonal relation, interference can be reduced and offset.
Compared with prior art, the present invention has the following advantages：
(1) it is very suitable for the dual polarized antenna configuration of mainstream, although at this time in the SINR of receiving algorithm processing front signal
It is larger, but disturb and can be eliminated well after receiving algorithm processing, SINR very littles, can effectively eliminate interference；(2) eventually
Extra feedback is not required in end；(3) cooperate precoding when do not require channel orthogonal in itself, it is only necessary to cooperating precoding just
Hand over, dispatching flexibility is high.
Brief description of the drawings
Fig. 1 is Cell Edge User interference schematic diagram；
Fig. 2 is the schematic diagram of a scenario of UE1, UE2, eNodeB2 in the case of same straight line；
Fig. 3 is the schematic diagram of a scenario of the cooperative beam shaping eliminated based on spatial domain interference；
Fig. 4 is the schematic diagram of precoding and precoding information interaction.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing further
Ground describes in detail.
In the specific embodiment of the present invention, cooperation precoding when institute produced problem is used for interference between neighbor cell,
Propose a kind of technical solution of new cooperation precoding, can independent of UE additional feedback with regard to good elimination can be reached
The purpose of interference.The scene being applicable in Fig. 1 to 3, can also be applied the scene with other neighbor cells.Further give
The interaction technique scheme of minizone cooperative information.
Cell A and cell B is neighbor cell, and the cooperation method for precoding of two cells includes：
Cell A uses waThe symbol to be launched of the user UE1 serviced it carries out precoding, and carries out data sending,
Identical transfer resource position, cell B use wbThe symbol to be launched of the user UE2 serviced it carries out precoding and goes forward side by side line number
According to transmission, the waWith the wbIt is precoding weights, both are orthogonality relation.
Further wa, wbCan be Wherein ua, ubFor oneVector or square
Battle array, NtFor transmitting antenna number, m be less than or equal toPositive integer, α is any real number or plural number.Further, ua, ubCan
With identical or different.Further ua, ubIt can be orthogonality relation.
Meanwhile a kind of exchange method of minizone cooperative information, including, cell A is transmitted to cell B feedback fractions or all
Precoding information on resource location；Further, cell B is to pre- on cell A feedback fractions or whole transfer resource position
Coding information.
The transmission and receiving of cell A and cell B can be completed by the base station of its ownership, both may belong to same base
Stand or belong to different base station.
In mobile communication system in Fig. 1 to 3, as shown in figure 4,
The first base station of cell A ownership uses the first precoding weight w in cell AaTo the symbol to be launched of user terminal 1
Terminal 1 is sent data to after carrying out precoding；
Second base station of cell B ownership uses the second precoding weight w in cell BbTo the symbol to be launched of user terminal 2
Terminal 2 is sent data to after carrying out precoding；
The first precoding weight waWith the second precoding weight wbFor orthogonality relation.
The first base station and the second base station are same base station or different base stations, i.e., described first community and second community
Belong to same base station or belong to different base stations.
The first precoding weightsThe second precoding weights
Wherein, ua, ubRespectively oneVector or matrix, NtFor transmitting antenna number, m be less than or equal toPositive integer, α is any real number or plural number.The uaAnd ubIt is identical or different vector or matrix.The uaAnd ubFor
Orthogonality relation.
In above-mentioned communication system, as shown in figure 4, between cell A and B during the interaction of cooperative information, cell A is anti-to cell B
Present the precoding information on part or all of transfer resource position.Further, cell B is passed to cell A feedback fractions or all
Precoding information on defeated resource location.The transmission and receiving of cell A and cell B can be completed by the base station of its ownership,
Both may belong to same base station or different base station.
Embodiment 1：
It is assumed that there are cell A and cell B, which may belong to same base station, can not also belong to same
Base station, carries out cooperation transmission.Cell A and cell B has Nt root transmitting antennas.On one section of time-frequency transfer resource M, M is one
RB (Resource Block, resource block) or multiple RBs, cell A use w to its service user UE1aCarry out precoding, Nt=
When 8, i.e. w during 8 transmitting antennasaIt can be a code word in LTE-A standards in 8 antenna stack, 1 code book.
Code book model during 1 layer of 8 antenna of LTE-A standards is：
Parameter phi thereinn=ejπn/2, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]T
For example, can beWherein,, can be with value 1 for a plural number, -1, j,-j are equivalent,For
DFT vectors,
On same section of time-frequency transfer resource M, cell B uses w to its service user UE2bCarry out precoding, wbCan be
A code word in LTE-A standards in 8 antenna stack, 1 code book.Such as can beWherein,For a plural number, For DFT vectors,
It by the above method, can cause in signal of the A cell transmissions to UE1, after by the processing of UE2 receiving algorithms, do
Disturb and be eliminated or reduced, while also so that signal of the B cell transmissions to UE2, after by the processing of UE1 receiving algorithms, disturbs and disappeared
Remove or reduce.
Embodiment 2
There are cell A and cell B, belongs to or is not belonging to same base station, carries out cooperation transmission.Cell A and B have Nt
Root transmitting antenna.
On one section of time-frequency transfer resource M, M is a RB (Resource Block, resource block) or multiple RBs, cell A
W is used to its service user UE1aCarry out precoding, during Nt=4, waCan be 4 days in LTE/LTE-A standards as shown in Table 1
A code word in 1 code book of line layer.
Table 1：4 antenna codebook lists
Wherein,I is unit battle array,Representing matrix WkJth column vector.Represent
Matrix WkJth1, j2..., jnArrange the matrix formed.Such as can be
On same section of time-frequency transfer resource M, cell B uses w to its service user UE2bCarry out precoding, wbCan be
A code word in LTE-A standards in 4 antenna stack, 1 code book.
Such as can beOther and w in either 4 antenna codebooksaOrthogonal code word, such asCan also use 4 antenna codebooks outside withOrthogonal pre-encoding codeword carries out precoding.
Embodiment 3：
There are cell A and cell B, belongs to same base station or belongs to different base stations, carries out cooperation transmission.Cell A and B
There are Nt root transmitting antennas.
On one section of time-frequency transfer resource M, M takes it for a RB (Resource Block) or multiple RBs, cell A
Business user UE1 uses waCarry out precoding, during Nt=8, waIt can be a code word in LTE-A standards in 8 antenna stack, 4 code book
Wherein two row.
Code word model is in code book during 4 layers of 8 antenna of LTE-A：
Wherein：φn=ejπn/2, vm=[1 ej2πm/32 ej4πm/32 ej6πm/32]T,
vm′=[1 ej2πm′/32 ej4πm′/32 ej6πm′/32]T
For example, it may beWherein,
, can be with value 1 for a plural number, -1, j,-j are equivalent,For DFT vectors：
On same section of time-frequency transfer resource M, cell B uses w to its service user UE2bCarry out precoding, wbCan be
Wherein two row of a code word in LTE-A standards in 8 antenna stack, 4 code book.
Such as can be
Wherein,For a plural number,For DFT vectors：
It can be seen that w hereaAnd wbIt is orthogonal.
It by the above method, can cause in signal of the A cell transmissions to UE1, after by the processing of UE2 receiving algorithms, do
Disturb and be eliminated or reduced, while also so that signal of the B cell transmissions to UE2, after by the processing of UE1 receiving algorithms, disturbs and disappeared
Remove or reduce.
Embodiment 4：
Similar with embodiment 3, the precoding weights can be：
WhereinWithIt is orthogonal.Or
Alternatively, the precoding weights can be：
WhereinWithIt is all orthogonal,WithIt is all orthogonal,OrIt is alternatively, described
Precoding weight wa, wbCan be the parameter that dimension does not wait, such as：
WhereinWithIt is all orthogonal,WithIt is all orthogonal,Or
Embodiment 5：
There are cell A and cell B, belongs to or is not belonging to same base station, carries out cooperation transmission.Cell A and B have Nt
Root transmitting antenna.
On one section of time-frequency transfer resource M, M is a resource block RB (Resource Block) or multiple resource blocks
(RBs), cell A uses w to its service user UE1aCarry out precoding.waIt can be any in following index (Index) 0~3
It is a.
On same section of time-frequency transfer resource M, cell B uses w to its service user UE2bCarry out precoding：
WhenWhen,
WhenWhen,
WhenWhen,
WhenWhen,
Embodiment 6：
There are cell A and cell B, both may belong to same base station or belong to different base stations, carries out cooperation transmission.
Precoding information on one section of time-frequency transfer resource M is issued cell B by cell A.M is a resource block RB (Resource
) or multiple resource blocks (RBs) Block；Correspondingly, the precoding information that cell B is sent according to cell A, layer information, is assisted
Make precoding.
Further, cell A can be by prelisting on the few time-frequency transfer resource position M1 part of M (M1 be)
Code information is sent to cell B；In addition cell B is sending the precoding information on a part of time-frequency transfer resource position M2
Give cell A.In transfer resource position M1, the precoding information that cell B is sent according to cell A, the precoding to cooperate：Passing
Defeated resource location M2, the precoding information that cell A is sent according to cell B, the precoding to cooperate.
Further, cell A and cell B can send precoding information on identical time-frequency transfer resource position.Example
Such as on one section of identical time-frequency transfer resource M, cell A sends precoding information and gives cell B, cell B also to send precoding letter
Cease and give cell A.Cell A and cell B, which is renegotiated, carries out cooperation precoding.
Embodiment 7：
Precoding information is quantified using precoding codebook, includes the use of codewords indexes letter corresponding with precoding codebook
Breath represents the precoding information；Alternatively, precoding information is quantified using parameter code book, including, first community and second
Cell arranges precoding model, and uses the parameter in parameter reference information quantization model corresponding with parameter code book.
The precoding information carries out quantization using precoding codebook and further includes：Prelist using described in the instruction of layer configured information
Code code book or parameter code book.When the first community and/or second community send precoding information, represent pre- using N number of bit
Code index information or parameter reference information.
When the first community and/or second community send precoding information, the model arranged isα
=1, -1, j,-j, the first community and/or second community inform that the parameter a of cooperation part model F (α) believes using 2 bits
Breath.
When the first community and/or second community send precoding information, the model that is limited as
α=1, -1, j,-j, the first community and/or second community are using the method for codebook quantification respectively to model F's (α, u)
Cooperation part is informed after parameter a, u information quantization.
When the first community and/or second community send precoding information, 4 antennas of LTE-A or 8 antenna codebooks are used
Or its subset quantifies precoding information, and inform the corresponding index information of cooperation part.
When it is implemented, as described in embodiment 6, when cell A or cell B send precoding information, come using N number of bit
Quantify precoding information.For example, quantify a layer information using 1 or 2 bit；Precoding information is represented using N number of bit.Use
The corresponding sub-codebook of layer quantifies precoding information, and 2NEqual to the code word number that layer corresponds to sub-codebook.It is of course also possible to using other
Code book.
When cell A or cell B sends precoding information, code word model F (α) can also be limited, only informs that we are used
Model to cooperation part.Such as limit the model that uses asα=1, -1, j,-j, model F (α) correlations are informed using 2bit
A information with determine specific F (α).
When cell A or cell B sends precoding information, code word model F (α, u) can also be limited, informs relevant a, u letters
Breath is with definite specific F (α, u).Such as limit the model that uses asUsable quantization bit informs relevant a, u information.
It is worth noting that in the present invention and its specific embodiment, the vector or matrix of description, each row are multiplied by one
Constant coefficient belongs to the equivalent transformation of the present invention, does not influence the implementation result of the present invention.In addition, for square all in the present invention
Battle array, to it includes row carry out arbitrary row exchange and belong to its equivalent transformation, do not influence its implementation result.
The foregoing is merely the embodiment of the present invention, is not intended to limit the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (21)
1. a kind of mobile communication system using cooperation precoding, including：The first base station and first community of first community ownership
The second user terminal that the first user terminal serviced, the second base station of second community ownership and second community are serviced；Its
In, on same section of running time-frequency resource,
The first base station is in first community using the first precoding weights to being sent to the symbol to be launched of the first user terminal
Number carry out precoding after send data to the first user terminal；
Second base station is in second community using the second precoding weights to being sent to the symbol to be launched of second user terminal
Number carry out precoding after send data to second user terminal；
The first community is fed back on part or all of transfer resource position by the first base station that it belongs to second community
Precoding information, the precoding information that the second community is fed back according to first community carries out cooperation precoding；
And/or the second community is fed back identical with first community or not by the second base station that it belongs to first community
Precoding information on same transfer resource, the precoding information that the first community is fed back according to second community carry out cooperation and prelist
Code；
The first precoding weights and the second precoding weights are orthogonality relation.
2. mobile communication system as claimed in claim 1, it is characterised in that
The first base station is same base station or different base stations from the second base station, i.e., described first community and second community belong to
Same base station belongs to different base stations.
3. mobile communication system as claimed in claim 1 or 2, it is characterised in that
The first precoding weightsThe second precoding weights
Wherein, ua, ubRespectively oneVector or matrix, NtFor transmitting antenna number, m be less than or equal to's
Positive integer, α are any real number or plural number.
4. mobile communication system as claimed in claim 3, it is characterised in that
The uaAnd ubIt is identical or different vector or matrix.
5. mobile communication system as claimed in claim 3, it is characterised in that
The uaAnd ubFor orthogonality relation.
6. mobile communication system as claimed in claim 3, it is characterised in that
First precoding weights and the second precoding weights are the code word in LTE-A standards in 8 antenna stack, 1 code book respectively；
Or respectively it is code word in LTE/LTE-A standards in 4 antenna stack, 1 code book；
Either extracted respectively in one code word of 8 antenna stack, 4 code book from LTE-A standards one or more columns per page obtained it is mutual
Orthogonal matrix；
Or respectively be setIn mutually orthogonal two values.
7. mobile communication system as claimed in claim 1, it is characterised in that
The precoding information is quantified using precoding codebook, includes the use of codewords indexes letter corresponding with precoding codebook
Breath represents the precoding information；Alternatively, the precoding information is quantified using parameter code book, including：First community and
Second community arranges precoding model, and uses the parameter in parameter reference information quantization model corresponding with parameter code book.
A kind of 8. method of the cooperation precoding in mobile communication system, in the first base station belonged to including first community and first
The second user terminal that the first user terminal that cell is serviced, the second base station of second community ownership and second community are serviced
Mobile communication system in, this method includes：
On same section of running time-frequency resource, first base station is in first community using the first precoding weights to being sent to the first user
The symbol to be launched of terminal sends data to the first user terminal after carrying out precoding；Second base station uses second in second community
Precoding weights send data to second user end after precoding is carried out to the symbol to be launched for being sent to second user terminal
End；The first precoding weights and the second precoding weights are orthogonality relation；
The first community is fed back on part or all of transfer resource position by the first base station that it belongs to second community
Precoding information；And/or
The second community is fed back in the biography identical or different with first community by the second base station that it belongs to first community
Precoding information in defeated resource.
9. method as claimed in claim 8, it is characterised in that
The first base station is same base station or different base stations from the second base station, i.e., described first community and second community belong to
Same base station belongs to different base stations.
10. method as claimed in claim 8 or 9, it is characterised in that
The first precoding weightsThe second precoding weights
Wherein, ua, ubRespectively oneVector or matrix, NtFor transmitting antenna number, m be less than or equal toJust
Integer, α are any real number or plural number.
11. method as claimed in claim 10, it is characterised in that
The uaAnd ubIt is identical or different vector or matrix.
12. method as claimed in claim 10, it is characterised in that
The uaAnd ubFor orthogonality relation.
13. method as claimed in claim 10, it is characterised in that
First precoding weights and the second precoding weights are the code word in LTE-A standards in 8 antenna stack, 1 code book respectively；
Or respectively it is code word in LTE/LTE-A standards in 4 antenna stack, 1 code book；
Either extracted respectively in one code word of 8 antenna stack, 4 code book from LTE-A standards one or more columns per page obtained it is mutual
Orthogonal matrix；
Or respectively be setIn mutually orthogonal two values.
14. method as claimed in claim 9, it is characterised in that
The precoding information is quantified using precoding codebook, includes the use of codewords indexes letter corresponding with precoding codebook
Breath represents the precoding information；Alternatively, the precoding information is quantified using parameter code book, including：First community and
Second community arranges precoding model, and uses the parameter in parameter reference information quantization model corresponding with parameter code book.
15. a kind of exchange method of minizone cooperative information, is applied small in the first base station and first belonged to including first community
The second user terminal that the first user terminal that area is serviced, the second base station of second community ownership and second community are serviced
In mobile communication system, which includes：
The first community is fed back on part or all of transfer resource position by the first base station that it belongs to second community
Precoding information, the precoding information that the second community is fed back according to first community carries out cooperation precoding；And/or
The second community is fed back on part or all of transfer resource position by the second base station that it belongs to first community
Precoding information, the precoding information that the first community is fed back according to second community carries out cooperation precoding.
16. exchange method as claimed in claim 15, it is characterised in that
The precoding information is quantified using precoding codebook, includes the use of codewords indexes letter corresponding with precoding codebook
Breath represents the precoding information；
Alternatively,
The precoding information is quantified using parameter code book, including, first community and second community agreement precoding model,
And use the parameter in parameter reference information quantization model corresponding with parameter code book.
17. exchange method as claimed in claim 16, it is characterised in that
The precoding information carries out quantization using precoding codebook and further includes：The precoding code is indicated using layer configured information
Sheet or parameter code book.
18. exchange method as claimed in claim 16, it is characterised in that
When the first community and/or second community send precoding information, using N number of bit represent pre-coded index information or
Parameter reference information.
19. exchange method as claimed in claim 16, it is characterised in that
When the first community and/or second community send precoding information, the model arranged isα=1 ,-
1, j ,-j, the first community and/or second community inform the parameter alpha information of cooperation part model F (α) using 2 bits.
20. exchange method as claimed in claim 16, it is characterised in that
When the first community and/or second community send precoding information, the model that is limited asα=
1, -1, j,-j, the first community and/or second community are using the method for codebook quantification respectively to the parameter of model F (α, u)
Cooperation part is informed after α, u information quantization.
21. exchange method as claimed in claim 16, it is characterised in that
When the first community and/or second community send precoding information, using 4 antennas of LTE-A or 8 antenna codebooks or its
Subset quantifies precoding information, and informs the corresponding index information of cooperation part.
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| PCT/CN2011/085028 WO2012094948A1 (en) | 2011-01-12 | 2011-12-30 | Coordinated precoding method, and coordinated information interaction method and system |
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| CN102075294B (en) * | 2011-01-12 | 2018-05-01 | 中兴通讯股份有限公司 | One kind cooperation method for precoding and system |
| EP2677813B1 (en) | 2011-12-15 | 2019-04-10 | Huawei Technologies Co., Ltd. | Interference coordination method, base station and communication system |
| CN102970106B (en) * | 2012-11-13 | 2015-08-19 | 北京航空航天大学 | There is the codeword selection of code word constraint and corresponding channel quality estimation method |
| CN104137603B (en) * | 2012-12-28 | 2018-01-19 | 华为技术有限公司 | Collaboration communication method, device and base station |
| CN103916174B (en) * | 2014-03-27 | 2017-01-18 | 西安空间无线电技术研究所 | Method for forming wave beam by combining spacial domain and polarization domain in frequency division duplex system |
| CN107547120A (en) * | 2016-06-24 | 2018-01-05 | 索尼公司 | Wireless communications method and Wireless Telecom Equipment |
| WO2018094713A1 (en) * | 2016-11-26 | 2018-05-31 | 华为技术有限公司 | Data transmission method, apparatus and system |
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