CN103023607B - Method and system for cooperative transmission of data - Google Patents
Method and system for cooperative transmission of data Download PDFInfo
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Abstract
The application discloses a method and system for cooperative transmission of data. The system comprises a local cell base station, M neighboring cell base stations, a data merging unit, a local cell radio frequency unit and M neighboring cell radio frequency units. The local cell base station is used for receiving the local cell channel information fed back to the local cell base station and neighboring cell channel information of each neighboring cell, wherein each piece of neighboring cell channel information comprises signal strength; the local cell base station is further used for judging whether each signal strength is higher than a preset threshold, and if M signal strengths are higher than the preset threshold, the local cell base station cooperates with the M base stations to obtain local cell precoding data of a local cell terminal and precoding data of M cooperative cells, and then transmits the precoding data to the data merging unit; the M neighboring cell base stations are used for obtaining local cell precoding data of the M neighboring cell base stations, and transmitting the local cell precoding data to the data merging unit; the data merging unit is used for merging the precoding data of the M cooperative cells and the local cell precoding data of the M neighboring cell base stations to get M merged precoding data; the local cell radio frequency unit is used for transmitting the local cell precoding data to the terminal; and the M neighboring cell radio frequency units are used for transmitting the merged precoding data to the terminal.
Description
Technical field
The application is related to communication technical field, more particularly to a kind of method and system of cooperative data transmission.
Background technology
With the development of communication technology, especially with 4G's (4th generation, forth generation wireless communication system)
Development, for the higher requirement that the performance of communication system is proposed, has higher especially for the frequency efficiency of up-downgoing
Require.And COMP (Coordinated multi-point transmission/reception, cooperate with multicast communication) due to
Speed rates coverage, cell edge service quality and handling capacity and throughput of system can be improved, so become raising
The important technology of the frequency efficiency of communication system up-downgoing, has obtained extensive concern.
COMP refers to multiple base station cooperative transmissions, serves one or more user terminals, and it adopts multiple cells
Different antennae is cell edge for providing service simultaneously, so not only avoids the interference of minizone, simultaneously because using
The technology of multiple antennas, can give full play to antenna increases the effect of space dimension so that the capacity and performance of system is obtained significantly
Lifted, so the frequency efficiency of communication system up-downgoing can be improved.
COMP includes that descending cooperative transmission and up joint are received, descending cooperative transmission include again combined dispatching with
Joint sends.Wherein joint transmission is referred to：Multiple cells send data to user terminal simultaneously, to strengthen connecing for user terminal
The collection of letters number.Plurality of cell includes this cell and corresponding adjacent cell, and adjacent cell is used to cooperate with this cell to send
Signal.
In process of the present invention is realized, inventor has found that at least there are the following problems in prior art：
(1) when due to cooperateing between base station, needs carry out data transmission between base station, so there is data traffic between base station
Larger problem；
(2) due to using X2 port transmission data, so there is the larger technical problem of X2 communication interface pressure.
The content of the invention
The present invention provides a kind of method and system of data transfer, to solve prior art in, due to needing in base station
Between carry out data transmission, so there is the larger technical problem of data traffic between base station.
The present invention is by the embodiment in the application, there is provided following technical scheme：
On the one hand, the present invention is by the one embodiment in the application, there is provided following technical scheme：
A kind of method of cooperative data transmission, be applied to include data combination unit and connected local area base station and with
The corresponding local area radio frequency unit in the local area base station, and N number of neighbor base station for being connected with the data combination unit and with the N
In individual neighbor base station in the communication system of the corresponding adjacent area radio frequency unit in each base station, wherein, N is the integer more than or equal to 1；
Methods described comprises the steps：
Receive to the local area channel information of the local area base station feedback, and the channels of neighboring areas of each adjacent area is believed in N number of adjacent area
Breath, described each channels of neighboring areas information includes signal intensity；
Judge that whether each signal intensity is more than pre-set threshold value in N number of signal intensity；
When there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area pre-coding matrix, association
The local area pre-coding matrix of each base station, is prelisted based on local area data and local area in same district pre-coding matrix and the M base station
Code matrix obtains the local area pre-code data of the local area terminal；As needed the data of cooperative transmission and collaboration area prelist
Code matrix obtains M collaboration area's pre-code data；According to the local area data of each base station in the M base station and the M base
The local area pre-coding matrix of each base station in standing, obtains the local area pre-code data of each base station of the M base station, wherein M
It is but the integer more than or equal to zero less than or equal to N；Obtain
Described M collaboration area's pre-code data and the local area pre-code data of the M base station are merged, obtain with
M radio frequency unit it is corresponding M merge after pre-code data；
The local area pre-code data is sent to terminal by local area radio frequency unit corresponding with the local area base station；With
And be sent to the pre-code data after described M merging by the M radio frequency unit corresponding with the M base station described
Terminal.
Optionally, it is described when there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area pre-
Encoder matrix and the local area pre-code data of the local area terminal is obtained according to local area data and the local area pre-coding matrix,
Specially：
Based on the local area channel information, or while based in the local area channel information and M channels of neighboring areas information
One or more channels of neighboring areas information, to the local area data distribution local area running time-frequency resource；
By the local area Deta bearer on the local area running time-frequency resource, this area carrier data are obtained；
Based on the local area channel information, or while based in the local area channel information and M channels of neighboring areas information
One or more channels of neighboring areas information, obtain the local area pre-coding matrix of described area carrier data；
Precoding is carried out to described area carrier data based on the local area pre-coding matrix and obtains local area pre-code data.
Optionally, it is described to obtain collaboration area's pre-coding matrix, and as needed the data of cooperative transmission and collaboration area are pre-
Encoder matrix obtains M collaboration area's pre-code data, specially：
Based on the local area channel information and the M channels of neighboring areas information, and/or the local area channel of M neighbor base station
Information, obtains M collaboration area's pre-coding matrix of described area carrier data；
Precoding is carried out to described area carrier data based on described M collaboration area's pre-coding matrix and obtains M collaboration in advance
Coded data.
Optionally, it is described according to each base station in the local area data of each base station in the M base station and the M base station
Local area pre-coding matrix, obtain the local area pre-code data of each base station of the M base station, specially：
Based on the local area channel information of each adjacent area of the M adjacent area, or while the local area based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of channel information and each adjacent area, to the M neighbor data
In each neighbor data distribution adjacent area running time-frequency resource；
Each neighbor data in the M neighbor data is carried on corresponding adjacent area running time-frequency resource, acquisition M is adjacent
Area carrier data；
Based on the local area channel information of each adjacent area of the M adjacent area, or while the local area based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of channel information and each adjacent area, obtain the M adjacent area and hold
Carry M adjacent area pre-coding matrix of data；
Using the adjacent area pre-coding matrix pair in M adjacent area pre-coding matrix corresponding with each adjacent area carrying data
Each adjacent area carries data and carries out precoding M adjacent area pre-code data of acquisition.
Optionally, it is described to be sent out the local area pre-code data by local area radio frequency unit corresponding with the local area base station
Terminal is delivered to, specially：
The local area pre-code data is sent to the local area radio frequency from the local area base station via data combination unit
Unit；
The local area pre-code data is converted into by the firstth radiofrequency signal by the local area radio frequency unit；
The firstth radiofrequency signal is sent to into terminal via the local area radio frequency unit.
Optionally, it is described pre- after the M radio frequency unit corresponding with the M base station merges described M
Coded data is sent to the terminal, specially：
Based on the base that M collaboration area's pre-code data and M adjacent area pre-code data are transmitted in a control table
Band receives the described M local area radio frequency unit for cooperateing with area's pre-code data and M adjacent area pre-code data with described
And the corresponding relation between the antenna of M adjacent area radio frequency unit, by superposition after the M pre-code datas to be sent point
It is not sent to the adjacent area radio frequency unit belonged in M adjacent area radio frequency unit corresponding with each pre-code data to be sent；
Each adjacent area radio frequency unit after corresponding pre-code data to be sent is received, by the pre-code data to be sent
In collaboration area pre-code data be converted to the second radiofrequency signal, and second radiofrequency signal is sent to the terminal.
On the other hand, the present invention provides following technical scheme by another embodiment in the application：
A kind of system of cooperative data transmission, including following structure：
Local area base station, and local area radio frequency unit corresponding with the local area base station；N number of neighbor base station, and with N number of neighbour
The corresponding adjacent area radio frequency unit of each neighbor base station in area base station, wherein, N is the integer more than or equal to 1；
Wherein, the local area base station, for receiving to the local area channel information of the local area base station feedback, and N number of adjacent area
In each adjacent area channels of neighboring areas information, described each channels of neighboring areas information includes signal intensity；
Judge that whether each signal intensity is more than pre-set threshold value in N number of signal intensity；
When there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area pre-coding matrix, association
The local area pre-coding matrix of each base station, is prelisted based on local area data and local area in same district pre-coding matrix and the M base station
Code matrix obtains the local area pre-code data of the local area terminal；As needed the data of cooperative transmission and collaboration area prelist
Code matrix obtains M collaboration area's pre-code data；Wherein, M is but the integer more than or equal to zero less than or equal to N；And
The local area pre-code data is sent to into the data combination unit；Area's pre-code data is cooperateed with by described M
Send to data combination unit；
M neighbor base station in N number of neighbor base station, for according to the local area number of each base station in the M base station
According to and the M base station in each base station local area pre-coding matrix, the local area for obtaining each base station of the M base station prelists
Code data；And the local area pre-code data of each base station of the M base station is sent to data combination unit；
Data combination unit：For the local area of described M collaboration area's pre-code data and the M base station to be prelisted yardage
According to merging, obtain M corresponding with M radio frequency unit merge after pre-code data；
Local area radio frequency unit：After for the M radio frequency unit corresponding with the M base station is merged for described M
Pre-code data, and send to terminal；
M adjacent area radio frequency unit in N number of adjacent area radio frequency unit, for receiving from the data combination unit
Pre-code data to be sent after M merging, and it is sent respectively to the terminal.
Optionally, the local area base station, including：
Local area Deta bearer unit：, in the local area running time-frequency resource, local area is obtained for by the local area Deta bearer
Carry data；
Local area pre-coding matrix obtaining unit：For being based on the local area channel information, or while believed based on the local area
One or more channels of neighboring areas information in road information and M channels of neighboring areas information, obtain the local area of described area carrier data
Pre-coding matrix；
Local area pre-code data obtaining unit：For being entered to described area carrier data based on the local area pre-coding matrix
Row precoding obtains local area pre-code data.
Optionally, the local area base station, also includes：
Collaboration area's pre-coding matrix obtaining unit：For being believed based on the local area channel information and the M channels of neighboring areas
Breath, and/or the local area channel information of M neighbor base station, obtain M collaboration area's pre-coding matrix of described area carrier data；
Collaboration area's pre-code data obtaining unit：For being held to the local area based on described M collaboration area's pre-coding matrix
Carrying data carries out M collaboration pre-code data of precoding acquisition.
Optionally, each neighbor base station in the M neighbor base station, including：
Adjacent area time-frequency resource distributing unit：For the local area channel information based on each adjacent area of the M adjacent area, or together
When local area channel information based on each adjacent area and each adjacent area channels of neighboring areas information in one or more adjacent areas letters
Road information, to each the neighbor data distribution adjacent area running time-frequency resource in the M neighbor data；
Neighbor data load bearing unit：For each neighbor data in the M neighbor data to be carried on into corresponding neighbour
On area's running time-frequency resource, obtain M adjacent area and carry data；
Adjacent area pre-coding matrix obtaining unit：For the local area channel information based on each adjacent area of the M adjacent area, or
One or more adjacent areas being based on simultaneously in the channels of neighboring areas information of the local area channel information of each adjacent area and each adjacent area
Channel information, obtains the M adjacent area pre-coding matrix that the M adjacent area carries data；
Adjacent area pre-code data obtaining unit：For pre- using the M adjacent area corresponding with each adjacent area carrying data
Adjacent area pre-coding matrix in encoder matrix carries data to each adjacent area and carries out precoding M adjacent area pre-code data of acquisition.
Optionally, the system, also includes：
Memory element, for storing control table, the control table is used for the reflection transmission local area pre-code data, described
The base band of M collaboration area's pre-code data and M adjacent area pre-code data and the reception local area pre-code data,
The local area radio frequency unit and the M adjacent area of M collaboration area's pre-code data and M adjacent area pre-code data
Corresponding relation between the antenna of radio frequency unit.
One or more technical schemes in above-mentioned technical proposal, have the following technical effect that or advantage：
(1) as a result of the technical scheme for all processing the precoding process of data in local area base station, so reach
Reduce the technique effect of data syn-chronization complexity and raising system reliability between base station；
(2) technical scheme of data merging is carried out as a result of in radio frequency unit front end, so reached make full use of
The advantage of hardware and the technique effect that is accurately positioned；
(3) domain encoder matrix is obtained simply by channel is exchanged as a result of in the not direct transmission data in minizone
Technical scheme, so reached the technique effect for substantially reducing X2 interface communication pressure.
Description of the drawings
Fig. 1 is the method flow diagram of cooperative data transmission in the embodiment of the present application one；
Fig. 2 is the schematic diagram of cooperative data transmission in the embodiment of the present application one；
Fig. 3 is the flow chart that local area pre-code data is obtained in the embodiment of the present application one；
Fig. 4 is the flow chart that collaboration area's pre-code data is obtained in the embodiment of the present application one；
Fig. 5 is the flow chart that M adjacent area pre-code data is obtained in the embodiment of the present application one；
Fig. 6 is to send local area pre-code data via data combination unit to the stream of terminal in the embodiment of the present application one
Journey；
Base band and receive the radio frequency unit that signal is adopted that Fig. 7 is adopted by sending signal in the embodiment of the present application one
Corresponding relation figure between antenna；
Fig. 8 is M pre-code data to be sent after superposition to be sent to the flow chart of terminal in the embodiment of the present application one；
Fig. 9 is the hardware environment figure of the system of cooperative data transmission in the embodiment of the present application two.
Specific embodiment
In order that the application the technical staff in the technical field is more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
Fig. 1 to Fig. 8 is refer to, the embodiment of the present application one provides a kind of method of cooperative data transmission, is applied to include
Data combination unit and connected local area base station and local area radio frequency unit corresponding with the local area base station, and with the data
The connected N number of neighbor base station of combining unit and adjacent area radio frequency unit corresponding with each base station in N number of neighbor base station it is logical
In letter system, wherein, N is the integer more than or equal to 1；Methods described comprises the steps：
S101：Receive to the local area channel information of the local area base station feedback, and the adjacent area of each adjacent area is believed in N number of adjacent area
Road information, described each channels of neighboring areas information includes signal intensity；
As shown in Fig. 2 being the schematic diagram figure of cooperative data transmission in specific implementation process.
Wherein, EPC refers to core net, provides to be passed from core net to each base station (being base station bbua, bbub in figure)
Defeated data, in the embodiment of the present application, core net to the data that base station bbua sends are a, to the data that base station bbub sends
For b.In addition, base station bbua is local area base station, base station bbub is neighbor base station.
In specific implementation process, the base station number in the application is not limited to two, the skill of the application art
Art personnel can adopt multiple base stations according to its actual demand.But as long as the application person of ordinary skill in the field is adopted
Technique effect produced by the number of base station is equal to technique effect in the embodiment of the present application, belongs to present invention
Within thought concept and range.
S102：Judge that whether each signal intensity is more than pre-set threshold value in N number of signal intensity；
In specific implementation process, the pre-set threshold value of an interference channel can be internally provided with local area base station bbua,
Here it is set as Sq；
So need to judge that whether each signal intensity is more than pre-set threshold value in the N number of signal intensity for feeding back one by one；
S103：When there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area precoding square
Battle array, cooperates with the local area pre-coding matrix of each base station in area's pre-coding matrix and the M base station, based on local area data and local area
Pre-coding matrix obtains the local area pre-code data of the local area terminal；As needed the data of cooperative transmission and collaboration area
Pre-coding matrix obtains M collaboration area's pre-code data；According to the local area data and the M of each base station in the M base station
The local area pre-coding matrix of each base station in individual base station, obtains the local area pre-code data of each base station of the M base station, its
Middle M is but the integer more than or equal to zero less than or equal to N；
In specific implementation process, if it is judged that the signal intensity S1 in M channels of neighboring areas information is more than predetermined threshold value
Sq, then local area base station bbua is cooperateed with neighbor base station bbub corresponding with this M signal intensity S1, obtains local area pre-
Encoder matrix W11 and M collaboration area pre-coding matrix W12, then obtains according to local area data a and local area pre-coding matrix W11
The local area pre-code data of local area terminal Uea is sent to, D11 is designated as.The data of cooperative transmission and M institute as needed
The collaboration area pre-code data that collaboration area pre-coding matrix W12 obtains the M local area data is stated, D12 is designated as.According to the M
The local area pre-coding matrix W22 of each base station obtains the local area precoding of the local area data that be sent to M terminal in individual base station
Data, are designated as D22.
Optionally, it is described when there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area pre-
Encoder matrix and the local area pre-code data of the local area terminal is obtained according to local area data and the local area pre-coding matrix,
As shown in figure 3, specifically including following steps：
S301：Based on the local area channel information, or while based on the local area channel information and M channels of neighboring areas information
In one or more channels of neighboring areas information, to the local area data distribution local area running time-frequency resource；
S302：By the local area Deta bearer on the local area running time-frequency resource, this area carrier data are obtained；
S303：Based on the local area channel information, or while based on the local area channel information and M channels of neighboring areas information
In one or more channels of neighboring areas information, obtain described area carrier data local area pre-coding matrix；
S304：Precoding is carried out to described area carrier data based on the local area pre-coding matrix and obtains local area precoding
Data.
In specific implementation process, if had determined that in S102 M channels of neighboring areas information H12 is so judged
In signal intensity S1 be more than predetermined threshold value Sq, then first based on local area channel information H11, or while be based on local area channel
Channels of neighboring areas information H12 corresponding to information H11 and M neighbor base station bbub being cooperateed with local area base station bbua is carried out
Collaboration, to the local area data a local area running time-frequency resource ra is distributed, and local area running time-frequency resource ra is a Deta bearer carrier；
Then local area data a are carried on local area running time-frequency resource ra, you can obtain this area carrier data a, the local area
Carry data a and local area data a to be substantially not different, simply many carrying carriers, so or being represented with a.
Then the local area channel information H11 is based on again, or while based on local area channel information H11 and and local area
Channels of neighboring areas information H12 corresponding to M neighbor base station bbub that base station bbua is cooperateed with is cooperateed with, and obtains the local area
Carry the local area pre-coding matrix W11 of data a；
It is finally based on and has been obtained for this area carrier data a and local area pre-coding matrix W11, using local area pre-coding matrix
W11 carries out precoding to this area carrier data a, obtains local area pre-code data D11, and its coding formula can be：
D11=W11*a ... ... ... ... ... ... ... ... [1]
In specific implementation process, the first local area pre-code data D11 method is obtained in the application and is not limited to formula 1.This
Application person of ordinary skill in the field can obtain the first local area precoding number according to its actual demand with other methods
According to D11, but as long as produced by the first local area pre-code data D11 for being calculated of the application person of ordinary skill in the field
The technique effect that technique effect is produced with formula in the embodiment of the present application 1 is equal to, and belongs to present invention thought concept model
Within enclosing.
Optionally, it is described to obtain collaboration area's pre-coding matrix, and as needed the data of cooperative transmission and collaboration area are pre-
Encoder matrix obtains M collaboration area's pre-code data, as shown in figure 4, comprising the steps：
S401：Based on the local area channel information and the M channels of neighboring areas information, and/or the local area of M neighbor base station
Channel information, obtains M collaboration area's pre-coding matrix of the data for needing cooperative transmission；
S402：Precoding is carried out based on described M collaboration area's pre-coding matrix to the data for needing cooperative transmission to obtain
Obtain M collaboration pre-code data.
In specific implementation process, the local area base station bbua first will distribute local area running time-frequency resource to local area data a
Ra, the adjacent area of the local area channel information H11 and M adjacent area Ueb for feeding back local area Uea to local area base station bbua from local area Uea are believed
The identification information of road information H12, the ID of local area terminal and local area terminal is sent to corresponding adjacent area base in M neighbor base station
Stand bbub；
Neighbor base station bbub is received after above- mentioned information, then combine the neighbour of adjacent area Ueb corresponding with neighbor base station bbub feedbacks
The local area channel information H22 in area, is matched in the Ueb of adjacent area, while giving adjacent area Ueb predistribution local area running time-frequency resource ra；
Then the Deta bearer of cooperative transmission will be needed on local area running time-frequency resource ra, you can obtain local area collaboration and carry number
According to.In specific implementation process, need the data of cooperative transmission, can be local area base station transmission total data a, or
A part in total data a of local area base station transmission, in the embodiment of the present application one, it is assumed that the data for needing cooperative transmission are
A, then it is also a that local area collaboration carries data.
Then, local area channel information H22, the predistribution running time-frequency resource of the adjacent area that neighbor base station bbub feeds back adjacent area Ueb
Ra, the ID of local area terminal, the identification information of adjacent area terminal are sent to local area base station bbua；
Local area base station bbua is received after the local area channel information H22 of the identification information of local area terminal and adjacent area terminal, base
In the identification information and the local area channel information H22 of adjacent area terminal feedback of local area terminal, and with reference to local area channel information H11, neighbour
Area channel information H12, the collaboration area pre-coding matrix for calculating local area base station, are designated as W12.
In specific implementation process, calculating the collaboration area pre-coding matrix of local area base station can also enter in neighbor base station
OK, then the collaboration area pre-coding matrix for calculating sent to local area base station.
In specific implementation process, the calculating position of collaboration area's pre-coding matrix of the local area base station in the application is not limited to
Local area base station, neighbor base station.As long as the application person of ordinary skill in the field calculates the collaboration area precoding of local area base station
The technique effect that matrix is produced is equal to the technique effect produced in the embodiment of the present application, belongs to present invention thought general
Within reading scope.
Since it is also a and collaboration area pre-coding matrix W12 to have been obtained for local area collaboration and carry data, then can be adopted
Carrying data a to local area collaboration with collaboration area pre-coding matrix W12 carries out precoding, obtains collaboration area's pre-code data D12, its
Encoding formula can be：
D12=W12*a ... ... ... ... ... ... ... [2]
In specific implementation process, the method that collaboration area's pre-code data D12 is calculated in the application is not limited to formula 2.This
Application person of ordinary skill in the field can obtain first and cooperate with area's precoding according to its actual demand with other methods
Data D12, but as long as first collaboration area's pre-code data D12 that the application person of ordinary skill in the field is calculated is produced
The technique effect that raw technique effect is produced with formula in the embodiment of the present application 2 is equal to, and belongs to present invention thought general
Within reading scope.
Optionally, it is described according to the local area data of each neighbor base station in the M neighbor base station and it is described M it is adjacent
The local area pre-coding matrix of each neighbor base station in area base station, obtains the local area of each neighbor base station of the M neighbor base station
Pre-code data, as shown in figure 5, specifically including following steps：
S501：Based on the local area channel information of each adjacent area of the M adjacent area, or while based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of local area channel information and each adjacent area, to the M adjacent area
Each neighbor data distribution adjacent area running time-frequency resource in data；
S502：Each neighbor data in the M neighbor data is carried on corresponding adjacent area running time-frequency resource, is obtained
M adjacent area carries data；
S503：Based on the local area channel information of each adjacent area of the M adjacent area, or while based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of local area channel information and each adjacent area, obtain it is described M it is adjacent
M adjacent area pre-coding matrix of area carrier data；
S504：Using the adjacent area precoding in M adjacent area pre-coding matrix corresponding with each adjacent area carrying data
Matrix carries data to each adjacent area and carries out precoding M adjacent area pre-code data of acquisition.
In specific implementation process, to neighbor data b adjacent area running time-frequency resource is distributed, be designated as rb, then hold neighbor data b
It is loaded on the running time-frequency resource rb of adjacent area, then can obtains adjacent area and carry data b；Because when neighbor data b is simply carried on adjacent area
In frequency resource rb, but the essence of its data does not change, so adjacent area carries data or b；
Due to there is channel to cooperate with local area base station bbua in neighbor base station bbub, so being based on local area channel information H11, neighbour
Channels of neighboring areas information H22 of area channel information H12 and adjacent area terminal, obtains the adjacent area end corresponding to collaboration area carrier data b
The local area pre-coding matrix W22 at end；
Since having obtained the local area pre-coding matrix W22 that adjacent area carries data b and adjacent area terminal, then can adopt
The local area pre-coding matrix W2 of adjacent area terminal carries data b and carries out precoding to adjacent area, obtains the local area precoding of adjacent area terminal
Data D22, it encodes formula can be：
D22=W22*b................................................ [3]
In specific implementation process, the method that the second local area pre-code data D22 is calculated in the application is not limited to formula 3.
The application person of ordinary skill in the field can obtain the local area of adjacent area terminal according to its actual demand with other methods
Pre-code data D22, but as long as the local area precoding of adjacent area terminal that the application person of ordinary skill in the field is calculated
The technique effect that technique effect produced by data D22 is produced with formula in the embodiment of the present application 3 is equal to, and belongs to the application's
Within invention thought concept and range.
S104：The local area pre-code data of described M collaboration area's pre-code data and the M neighbor base station is closed
And, obtain M corresponding with M radio frequency unit merge after pre-code data；
Above obtain the local area pre-code data of M collaboration area's pre-code data and the M base station, then
Jing data combination unit Jing after row merging treatment, the pre-code data after the M merging for obtaining, specially：
D12+D22=W12*a+W22*b..................................... ... ... ..
[4]
S105：The local area pre-code data was sent to end by local area radio frequency unit corresponding with the local area base station
End；And the pre-code data after the M radio frequency unit corresponding with the M base station merges described M sends
To the terminal.
Optionally, it is described to be sent out the local area pre-code data by local area radio frequency unit corresponding with the local area base station
Terminal is delivered to, as shown in fig. 6, specifically including following steps：
S601：The local area pre-code data is sent to the local area from the local area base station via data combination unit
Radio frequency unit；
S602：The local area pre-code data is converted into by the firstth radiofrequency signal by the local area radio frequency unit；
S603：The firstth radiofrequency signal is sent to into terminal via the local area radio frequency unit.
Optionally, local area pre-code data D11 is being sent out from the local area base station bbua via data combination unit
When delivering to the local area radio frequency unit rrua, can first by the base band for transmitting the local area pre-code data and the reception institute
Corresponding relation between the antenna of the local area radio frequency unit rrua for stating local area pre-code data, constitutes a control table.
In the embodiment of the present application, prelisted using the first base band signal transmission local area of the id11 base band of local area base station bbua
The first via signal of code data D11, the second base band signal transmission local area pre-code data of the id11 base band of local area base station bbua
The second road signal of D11；Then the first of local area pre-code data D11 is received with the antenna id1-1 of local area radio frequency unit rrua
Road signal, antenna id1-2 receives the second road signal of local area pre-code data D11；
In addition, also prelisting comprising transmission M collaboration area's pre-code data and the M adjacent area in the control table
The base band of code data receives the M and cooperates with described of area's pre-code data and M adjacent area pre-code data with described
Corresponding relation between the antenna of area's radio frequency unit and M adjacent area radio frequency unit.
In the embodiment of the present application, the first base band signal transmission collaboration area using the id12 base band of local area base station bbua is pre-
The first via signal of encoded data D 12, the second base band signal transmission collaboration area's precoding of the id12 base band of local area base station bbua
The second road signal of data D12；Then collaboration area's pre-code data D12 is received with the antenna id2-1 of adjacent area radio frequency unit rrub
First via signal, antenna id2-2 receive collaboration area's pre-code data D12 second road signal；
The local area precoding of the first base band signal transmission neighbor base station of the id22 base band of neighbor base station bbub is adopted in addition
The first via signal of data D22, the second base band signal transmission collaboration area's pre-code data of the id22 base band of neighbor base station bbub
The second road signal of D22；Then the local area pre-code data of neighbor base stations is received with the antenna id2-1 of adjacent area radio frequency unit rrub
The first via signal of D22, antenna id2-2 receives the second road signal of local area pre-code data D22 of neighbor base station；
A control table is so obtained, specially：Base band and receive what signal was adopted that sending signal is adopted
Corresponding relation between the antenna of radio frequency unit, the control table is as shown in Figure 7.
In specific implementation process, the control table generated in the application is not limited to the form showed in Fig. 7, belonging to the application
Those skilled in the art can obtain other control tables according to its actual demand, but as long as the affiliated technology neck of the application
The technique effect produced by control table that the technical staff in domain is obtained is produced with the control table shown in Fig. 7 in the embodiment of the present application
Technique effect equivalent, within belonging to present invention thought concept and range.
After the control table shown in Fig. 7 is generated, based on the control table shown in Fig. 7, local area base station bbua is by local area precoding
Data D11 are sent to data combination unit, and then data combination unit is with reference to the control table shown in Fig. 7, and local area is prelisted yardage
Send to local area radio frequency unit rrua according to D11；
Then local area pre-code data D11 is converted into the first radiofrequency signal by local area radio frequency unit rrua；
First radiofrequency signal is sent to terminal by last local area radio frequency unit rrua, and terminal here is the collaboration
Any terminal in transmission data system.
Optionally, it is described pre- after the M radio frequency unit corresponding with the M base station merges described M
Coded data is sent to the terminal, as shown in figure 8, specifically including following steps：
S801：Area's pre-code data and M adjacent area pre-code data are cooperateed with based on transmitting described M in a control table
Base band receive the M local area radio frequency for cooperateing with area's pre-code data and M adjacent area pre-code data with described
Corresponding relation between the antenna of unit and M adjacent area radio frequency unit, by superposition after the M yardages that prelist to be sent
According to being separately sent to the adjacent area radio frequency list belonged in M adjacent area radio frequency unit corresponding with each pre-code data to be sent
Unit；
S802：Each adjacent area radio frequency unit to be sent prelists this after corresponding pre-code data to be sent is received
Collaboration area pre-code data in code data is converted to the second radiofrequency signal, and second radiofrequency signal was sent to the end
End.
In specific implementation process, the pre-code data that data combination unit will be superimposed after M merging of generation, specifically
For：D12+D22=W12*a+W22*, is sent to corresponding adjacent area radio frequency unit rrub based on the control table shown in Fig. 7；
Corresponding precoding in pre-code data after finally adjacent area radio frequency unit rrub merges M received
Data W12*a+W22*b, send to terminal, and terminal here is any terminal in the cooperative data transmission system.
Fig. 9 is refer to, the embodiment of the present application two provides a kind of system of cooperative data transmission, and the system includes following knot
Structure：
Local area base station bbua, and local area radio frequency unit rrua corresponding with the local area base station；N number of neighbor base station, and with
The corresponding adjacent area radio frequency unit rrub of each neighbor base station bbub in N number of neighbor base station, wherein, N is more than or equal to 1
Integer；
Wherein, the local area base station bbua, for receiving to the local area channel information of local area base station bbua feedbacks, and
The channels of neighboring areas information of each adjacent area in N number of adjacent area, described each channels of neighboring areas information includes signal intensity；Judge the N
Whether each signal intensity is more than pre-set threshold value in individual signal intensity；When there is M signal intensity to be more than pre-set threshold value, and M
Base station is cooperated, and obtains local area pre-coding matrix, cooperates with the local area of each base station in area's pre-coding matrix and the M base station
Pre-coding matrix, based on local area data and local area pre-coding matrix the local area pre-code data of the local area terminal is obtained；
As needed the data of cooperative transmission and collaboration area's pre-coding matrix obtain M collaboration area's pre-code data；Wherein, M be less than
Or equal to N, but the integer more than or equal to zero；And
The local area pre-code data is sent to into the data combination unit；Area's pre-code data is cooperateed with by described M
Send to data combination unit；
M neighbor base station in N number of neighbor base station, for according to the sheet of each base station in the M neighbor base station
The local area pre-coding matrix of each neighbor base station in area's data and the M neighbor base station, obtains the every of the M neighbor base station
The local area pre-code data of individual neighbor base station bbub；And by the local area of each neighbor base station bbub of the M neighbor base station
Pre-code data is sent to data combination unit；
Data combination unit：For the local area of described M collaboration area's pre-code data and the M base station to be prelisted yardage
According to merging, obtain M corresponding with M radio frequency unit merge after pre-code data；
Local area radio frequency unit rrua：For receiving the local area pre-code data from local area base station, and send to end
End；
M adjacent area radio frequency unit rrub in N number of adjacent area radio frequency unit, merges single for receiving from the data
Pre-code data to be sent after M merging of unit, and it is sent respectively to the terminal.
Optionally, the local area base station bbua, including：
Local area Deta bearer unit：, in the local area running time-frequency resource, local area is obtained for by the local area Deta bearer
Carry data；
Local area pre-coding matrix obtaining unit：For being based on the local area channel information, or while believed based on the local area
One or more channels of neighboring areas information in road information and M channels of neighboring areas information, obtain the local area of described area carrier data
Pre-coding matrix；
Local area pre-code data obtaining unit：For being entered to described area carrier data based on the local area pre-coding matrix
Row precoding obtains local area pre-code data.
Optionally, the local area base station bbua, also includes：
Area's pre-coding matrix obtaining unit：For being based on the local area channel information and the M channels of neighboring areas information,
And/or the local area channel information of M neighbor base station, obtain M collaboration area's pre-coding matrix of described area carrier data；
Collaboration area's pre-code data obtaining unit：For being held to the local area based on described M collaboration area's pre-coding matrix
Carrying data carries out M collaboration pre-code data of precoding acquisition.
Optionally, each neighbor base station bbub in the M neighbor base station, also includes：
Adjacent area time-frequency resource distributing unit：For the local area channel information based on each adjacent area of the M adjacent area, or together
When local area channel information based on each adjacent area and each adjacent area channels of neighboring areas information in one or more adjacent areas letters
Road information, to each the neighbor data distribution adjacent area running time-frequency resource in the M neighbor data；
Neighbor data load bearing unit：For each neighbor data in the M neighbor data to be carried on into corresponding neighbour
On area's running time-frequency resource, obtain M adjacent area and carry data；
Adjacent area pre-coding matrix obtaining unit：For the local area channel information based on each adjacent area of the M adjacent area, or
One or more adjacent areas being based on simultaneously in the channels of neighboring areas information of the local area channel information of each adjacent area and each adjacent area
Channel information, obtains the M adjacent area pre-coding matrix that the M adjacent area carries data；
Adjacent area pre-code data obtaining unit：For pre- using the M adjacent area corresponding with each adjacent area carrying data
Adjacent area pre-coding matrix in encoder matrix carries data to each adjacent area and carries out precoding M adjacent area pre-code data of acquisition.
Optionally, the system of the cooperative data transmission, also includes：
Memory element, for storing control table, the control table is used for the reflection transmission local area pre-code data, described
The base band of M collaboration area's pre-code data and M adjacent area pre-code data and the reception local area pre-code data,
The local area radio frequency unit and the M adjacent area of M collaboration area's pre-code data and M adjacent area pre-code data
Corresponding relation between the antenna of radio frequency unit.
One or more technical schemes in above-mentioned technical proposal, have the following technical effect that or advantage：
(1) as a result of the technical scheme for all processing the precoding process of data in local area base station, so reach
Reduce the technique effect of data syn-chronization complexity and raising system reliability between base station；
(2) technical scheme of data merging is carried out as a result of in radio frequency unit front end, so reached make full use of
The advantage of hardware and the technique effect that is accurately positioned；
(3) domain encoder matrix is obtained simply by channel is exchanged as a result of in the not direct transmission data in minizone
Technical scheme, so reached the technique effect for substantially reducing X2 interface communication pressure.
Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the application scope.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
Claims (11)
1. a kind of method of cooperative data transmission, be applied to include data combination unit and connected local area base station and with institute
State the corresponding local area radio frequency unit in local area base station, and N number of neighbor base station for being connected with the data combination unit and N number of with described
In neighbor base station in the communication system of the corresponding adjacent area radio frequency unit of each neighbor base station, wherein, N is whole more than or equal to 1
Number；Characterized in that, methods described includes：
Receive to the local area channel information of the local area base station feedback, and in N number of adjacent area each adjacent area channels of neighboring areas information, institute
State each channels of neighboring areas information and include signal intensity；
Judge that whether each signal intensity is more than pre-set threshold value in N number of signal intensity；
When there is M signal intensity to be more than pre-set threshold value, and M neighbor base station is cooperated, and obtains local area pre-coding matrix, association
The local area pre-coding matrix of each neighbor base station in same district pre-coding matrix and the M neighbor base station, based on local area data and
Local area pre-coding matrix obtains the local area pre-code data of the local area terminal；As needed the data of cooperative transmission and collaboration area
Pre-coding matrix obtains M collaboration area's pre-code data；According to the local area data of each base station and institute in the M neighbor base station
The local area pre-coding matrix of each neighbor base station in M neighbor base station is stated, each neighbor base station of the M neighbor base station is obtained
Local area pre-code data, wherein M is but the integer more than or equal to zero less than or equal to N；
Described M collaboration area's pre-code data and the local area pre-code data of the M neighbor base station are merged, obtain with
M radio frequency unit it is corresponding M merge after pre-code data；
The local area pre-code data is sent to terminal by local area radio frequency unit corresponding with the local area base station；And it is logical
The pre-code data crossed after M adjacent area radio frequency unit corresponding with the M neighbor base station merges described M is sent to
The terminal.
2. the method for claim 1, it is characterised in that described when there is M signal intensity to be more than pre-set threshold value, and M
Individual neighbor base station is cooperated, and is obtained local area pre-coding matrix and is obtained according to local area data and the local area pre-coding matrix
The local area pre-code data of the local area terminal, specially：
Based on the local area channel information, or while based in the local area channel information and M channels of neighboring areas information
Or multiple channels of neighboring areas information, to the local area data distribution local area running time-frequency resource；
By the local area Deta bearer on the local area running time-frequency resource, this area carrier data are obtained；
Based on the local area channel information, or while based in the local area channel information and M channels of neighboring areas information
Or multiple channels of neighboring areas information, obtain the local area pre-coding matrix of described area carrier data；
Precoding is carried out to described area carrier data based on the local area pre-coding matrix and obtains local area pre-code data.
3. method as claimed in claim 1 or 2, it is characterised in that the acquisition cooperates with area's pre-coding matrix, and according to need
The data and collaboration area's pre-coding matrix for wanting cooperative transmission obtain M collaboration area's pre-code data, specially：
Based on the local area channel information and the M channels of neighboring areas information, and/or the local area channel information of M neighbor base station,
Obtain M collaboration area's pre-coding matrix of described area carrier data；
The data of cooperative transmission are needed to carry out M collaboration of precoding acquisition to described based on described M collaboration area's pre-coding matrix
Pre-code data.
4. method as claimed in claim 1 or 2, it is characterised in that described according to each adjacent area base in the M neighbor base station
The local area pre-coding matrix of each base station in the local area data stood and the M neighbor base station, obtains the M neighbor base station
The local area pre-code data of each neighbor base station, specially：
Based on the local area channel information of each adjacent area of the M adjacent area, or while the local area channel based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of information and each adjacent area, in the M neighbor data
Each neighbor data distribution adjacent area running time-frequency resource；
Each neighbor data in the M neighbor data is carried on corresponding adjacent area running time-frequency resource, M adjacent area is obtained and is held
Carry data；
Based on the local area channel information of each adjacent area of the M adjacent area, or while the local area channel based on each adjacent area
One or more channels of neighboring areas information in the channels of neighboring areas information of information and each adjacent area, obtain the M adjacent area and carry number
According to M adjacent area pre-coding matrix；
Using the adjacent area pre-coding matrix in M adjacent area pre-coding matrix corresponding with each adjacent area carrying data to each
Adjacent area carries data and carries out precoding M adjacent area pre-code data of acquisition.
5. the method for claim 1, it is characterised in that described by local area radio frequency list corresponding with the local area base station
Unit sends the local area pre-code data to terminal, specially：
The local area pre-code data is sent to the local area radio frequency unit from the local area base station via data combination unit；
The local area pre-code data is converted into by the first radiofrequency signal by the local area radio frequency unit；
First radiofrequency signal is sent to into terminal via the local area radio frequency unit.
6. the method for claim 1, it is characterised in that described by the M radio frequency corresponding with the M base station
Pre-code data after unit merges described M is sent to the terminal, specially：
Based on transmit in a control table it is described M collaboration area's pre-code data and M adjacent area pre-code data base band and
The local area radio frequency unit and the institute for receiving M collaboration area's pre-code data and M adjacent area pre-code data
State the corresponding relation between the antenna of M adjacent area radio frequency unit, by superposition after the M pre-code datas to be sent send out respectively
It is sent to the adjacent area radio frequency unit belonged in M adjacent area radio frequency unit corresponding with each pre-code data to be sent；
Each adjacent area radio frequency unit after corresponding pre-code data to be sent is received, by the pre-code data to be sent
Collaboration area's pre-code data is converted to the second radiofrequency signal, and second radiofrequency signal is sent to the terminal.
7. a kind of system of cooperative data transmission, it is characterised in that include：
Local area base station, and local area radio frequency unit corresponding with the local area base station；N number of neighbor base station, and with N number of adjacent area base
The corresponding adjacent area radio frequency unit of each neighbor base station in standing, wherein, N is the integer more than or equal to 1；
Wherein, the local area base station, for receiving to the local area channel information of the local area base station feedback, and in N number of adjacent area often
The channels of neighboring areas information of individual adjacent area, described each channels of neighboring areas information includes signal intensity；
Judge that whether each signal intensity is more than pre-set threshold value in N number of signal intensity；
When there is M signal intensity to be more than pre-set threshold value, and M base station is cooperated, and obtains local area pre-coding matrix, cooperates with area
The local area pre-coding matrix of each base station in pre-coding matrix and the M base station, based on local area data and local area precoding square
Battle array obtains the local area pre-code data of the local area terminal；As needed the data of cooperative transmission and collaboration area's pre-coding matrix are obtained
Obtain M collaboration area's pre-code data；Wherein, M is but the integer more than or equal to zero less than or equal to N；And
The local area pre-code data is sent to into the data combination unit；Described M collaboration area's pre-code data is sent
To data combination unit；
M neighbor base station in N number of neighbor base station, for according to the sheet of each neighbor base station in the M neighbor base station
The local area pre-coding matrix of each neighbor base station in area's data and the M neighbor base station, obtains each base of the M base station
The local area pre-code data stood；And the local area pre-code data of each base station of the M base station is sent to data merging
Unit；
Data combination unit：For the local area pre-code data of described M collaboration area's pre-code data and the M base station to be entered
Row merges, and obtains the pre-code data after M merging corresponding with M radio frequency unit；
Local area radio frequency unit：For receiving the local area pre-code data from the local area base station, and send to terminal；
M adjacent area radio frequency unit in N number of adjacent area radio frequency unit, for receiving M from the data combination unit
Pre-code data to be sent after merging, and it is sent respectively to the terminal.
8. system as claimed in claim 7, it is characterised in that the local area base station, including：
Local area Deta bearer unit：, in the local area running time-frequency resource, this area carrier is obtained for by the local area Deta bearer
Data；
Local area pre-coding matrix obtaining unit：For being based on the local area channel information, or while believed based on the local area channel
One or more channels of neighboring areas information in breath and M channels of neighboring areas information, the local area for obtaining described area carrier data prelists
Code matrix；
Local area pre-code data obtaining unit：It is pre- for being carried out to described area carrier data based on the local area pre-coding matrix
Coding obtains local area pre-code data.
9. system as claimed in claim 7 or 8, it is characterised in that the local area base station, also includes：
Collaboration area's pre-coding matrix obtaining unit：For being based on the local area channel information and the M channels of neighboring areas information,
And/or the local area channel information of M neighbor base station, obtain M collaboration area's pre-coding matrix of described area carrier data；
Collaboration area's pre-code data obtaining unit：For needing collaboration to pass to described based on described M collaboration area's pre-coding matrix
Defeated data carry out precoding and obtain M collaboration pre-code data.
10. system as claimed in claim 7, it is characterised in that each neighbor base station in the M neighbor base station, including：
Adjacent area time-frequency resource distributing unit：For being based on the local area channel information of each adjacent area of the M adjacent area, or while base
One or more channels of neighboring areas letters in the local area channel information of each adjacent area and the channels of neighboring areas information of each adjacent area
Breath, to each the neighbor data distribution adjacent area running time-frequency resource in the M neighbor data；
Neighbor data load bearing unit：During for each neighbor data in the M neighbor data to be carried on into corresponding adjacent area
In frequency resource, obtain M adjacent area and carry data；
Adjacent area pre-coding matrix obtaining unit：For the local area channel information based on each adjacent area of the M adjacent area, or while
Local area channel information based on each adjacent area and one or more channels of neighboring areas in the channels of neighboring areas information of each adjacent area
Information, obtains the M adjacent area pre-coding matrix that the M adjacent area carries data；
Adjacent area pre-code data obtaining unit：For using M adjacent area precoding corresponding with each adjacent area carrying data
Adjacent area pre-coding matrix in matrix carries data to each adjacent area and carries out precoding M adjacent area pre-code data of acquisition.
11. systems as claimed in claim 7, it is characterised in that also include：
Memory element, for storing control table, it is individual that the control table is used for the reflection transmission local area pre-code data, the M
The base band of collaboration area's pre-code data and M adjacent area pre-code data receives the local area pre-code data, institute with described
State M collaboration area's pre-code data and M adjacent area pre-code data the local area radio frequency unit and the M adjacent area penetrate
Corresponding relation between the antenna of frequency unit.
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