CN102916784B - Method and device for pre-coding coordinated-multiple-point transmission based on grouped wave beam - Google Patents
Method and device for pre-coding coordinated-multiple-point transmission based on grouped wave beam Download PDFInfo
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Abstract
The invention discloses a method and a device for pre-coding CoMP (coordinated-multiple-point) transmission based on a grouped wave beam. The method comprises the following steps: using a group of wave beams to scan a community, searching a potential CoMP paired user and acquiring information of the potential CoMP paired user by a base station; between the adjacent base stations, by interchanging acquired information of a potential CoMP paired user of a counterpart community, determining the CoMP paired users of the community and the adjacent community, and then directly according to the configured grouped wave beam matrix and the information of the CoMP paired user of the community, determining a CoMP precoding matrix of the CoMP paired user of the community; and during communication of the CoMP paired users of the community and the adjacent community, precoding a signal of the CoMP paired user of the community by using the determined CoMP precoding matrix. Therefore, through adoption of the method and the device for pre-coding the CoMP transmission based on the grouped wave beam, high-efficiency and high-precision CoMP pre-coding can be achieved and the performances of the whole system is improved.
Description
Technical field
The present invention relates to wireless communication field, the side of particularly a kind of coordinated multipoint transmission precoding based on packet wave beam
Method and device.
Background technology
Coordinated multipoint transmission (Coordinated Multiple Point, CoMP) technology is Long Term Evolution (Long Term
Evolution-Advanced, LTE-A) system expand network edge cover, ensure edge customer service quality (Quality of
Service, QoS) one of important technology, be the exclusive technology of lte-a system.CoMP technologies are moved by interaction between adjacent base station
Family channel information is employed, adjacent base station takes certain interference avoidance strategy or multiple base stations to mobile use to disturbed user
Family carries out joint transmission, mainly for Cell Edge User, to reduce the interference of edge customer, improves gulping down for cell-edge data
The amount of telling and spectrum utilization efficiency.
In lte-a system, CoMP includes two kinds of scenes：Cooperation between base stations and distributing antenna system.From data flow
From the point of view of, CoMP can be divided into descending transmission CoMP and uplink receiving CoMP again.Descending transmission CoMP includes two class technologies：Cooperative scheduling
With beam shaping, Combined Treatment and transmission.And for uplink receiving CoMP, then only joint is received and processes a kind of skill
Art.
In prior art when CoMP precoding processings are carried out to signal, first have to determine CoMP activation user's collection, then
The minimum user's set of channel relevancy each other is selected using channel relevancy dispatching criterion, as final CoMP transmission
User collects；Then the channel condition information of each user is concentrated further according to CoMP transmission user, pre-coding matrix is designed, so, will
Two processes of user and design matrix of selection are separately carried out, and reduce signal precoding treatment effeciency, so as to affect whole system
Performance.
The indicating means and system of a kind of extra pre-coding matrix index are given in prior art, the method includes：
User equipment determines extra pre-coding matrix index type, is carried for indicating extra precoding in ascending control information
The configured information of matrix index type, is sent to base station；Or, base station determines extra pre-coding matrix index type, under
Carry in row control information or high-rise configuration signal for indicating the configured information of extra pre-coding matrix index type, send
To user equipment.Wherein, the extra pre-coding matrix index type is preferably pairing pre-coding matrix index or worst
Pairing pre-coding matrix index.Precoding processing of the method using codebook mode, can bring certain loss in precision.
The content of the invention
The embodiment of the present invention provides a kind of method and device of the CoMP precodings based on packet wave beam, to realize efficiently
Rate, high-precision CoMP precoding processings.
A kind of method of CoMP precodings based on packet wave beam provided in an embodiment of the present invention includes：
Two adjacent base stations are utilized respectively one group of wave beam of identical and are scanned in the cell for being covered, and search in this
The user of cell edge is used as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP；
The information of the potential pairing users of CoMP of other side's cell that each base station is obtained according to interaction respectively, obtains this cell
With the CoMP pairing users of adjacent cell；
Each base station determines this cell according to the information of the CoMP pairing users of the packet beamforming matrix and this cell of construction
CoMP match user CoMP pre-coding matrixes, wherein, packet beamforming matrix according to one group of beam configurations；
When CoMP pairing telex network of this cell with adjacent cell, the CoMP precodings that each base station is determined using itself
Matrix, carries out precoding processing to the signal of the CoMP pairing users of this cell.
A kind of device of CoMP precodings based on packet wave beam provided in an embodiment of the present invention includes：
Scan module, for being scanned in the cell for being covered using one group of wave beam, is searched in this cell edge
User as the potential pairing users of CoMP, and obtain CoMP it is potential pairing user information；
Device information interaction and CoMP pairing user's selecting modules, the CoMP of the other side's cell for being obtained according to interaction
The information of potential pairing user, obtains the CoMP pairing users of this cell and adjacent cell；
Pre-coding matrix determining module, the CoMP for packet beamforming matrix and this cell according to construction match user's
Information determines that the CoMP of this cell matches the CoMP pre-coding matrixes of user, wherein, packet beamforming matrix is according to one group of ripple
Beam is constructed；
Precoding module, it is for when the CoMP of this cell and adjacent cell matches telex network, true using pre-coding matrix
The CoMP pre-coding matrixes that cover half block determines, carry out precoding processing to the signal of the CoMP pairing users of this cell.
As seen through the above technical solutions, in embodiments of the present invention, two adjacent base stations are utilized respectively one group of identical
Wave beam is scanned in the cell for being covered, and searches the user in this cell edge as the potential pairing users of CoMP, and
Obtain the information of the potential pairing users of CoMP；The potential pairings of CoMP of other side's cell that each base station is obtained according to interaction respectively are used
The information at family, obtains the CoMP pairing users of this cell and adjacent cell；Each base station is according to the packet beamforming matrix for constructing and originally
The information of the CoMP pairing users of cell determines that the CoMP of this cell matches the CoMP pre-coding matrixes of user, wherein, it is grouped ripple
Beam matrix is according to one group of beam configurations；When CoMP pairing telex network of this cell with adjacent cell, each base station utilizes
The CoMP pre-coding matrixes that itself determines, carry out precoding processing to the signal of the CoMP pairing users of this cell.It is of the invention real
The method of example is applied while scanning search CoMP potential pairing users, just has been obtained for determining CoMP pre-coding matrixes when institute
The CoMP of needs matches the information of user, and then between base station, this information of interaction determines the CoMP pairing users of this cell and adjacent cell
Afterwards, so that it may directly determine CoMP pre-coding matrixes, therefore, the embodiment of the present invention can be realized efficient, high-precision
CoMP precoding processings so that each user does not produce interference to other pairing users, so as to improve the performance of whole system.
Description of the drawings
Schematic flow sheets of the Fig. 1 for the specific embodiment of the inventive method；
Schematic diagrams of the Fig. 2 for the packet wave beam of the embodiment of the present invention；
Fig. 3 applies the schematic diagram in neighbor cell for present invention method；
Structural representations of the Fig. 4 for apparatus of the present invention embodiment.
Specific embodiment
A kind of method and device of CoMP precodings based on packet wave beam provided in an embodiment of the present invention, the method bag
Include：Two adjacent base stations are utilized respectively one group of wave beam of identical and are scanned in the cell for being covered, and search in this cell
The user at edge is used as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP；Each base station basis respectively
The information of the potential pairing users of CoMP of other side's cell that interaction is obtained, obtains the CoMP pairing users of this cell and adjacent cell；
According to the information of the CoMP pairing users of the packet beamforming matrix and this cell of construction, each base station determines that the CoMP of this cell matches somebody with somebody
CoMP pre-coding matrixes to user, wherein, packet beamforming matrix is according to one group of beam configurations；When this cell and adjacent cell
CoMP pairing telex networks when, the CoMP pre-coding matrixes that each base station is determined using itself are matched to the CoMP of this cell
The signal of user carries out precoding processing.
Schematic flow sheets of the Fig. 1 for the specific embodiment of the inventive method.
Shown in Figure 1, a kind of method of the CoMP precodings based on packet wave beam provided in an embodiment of the present invention includes
Following steps：
Step 101：Two adjacent base stations are utilized respectively one group of wave beam of identical and are scanned in the cell for being covered, and search
The user in this cell edge is sought as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP.
Here, one group of wave beam includes the first wave beam and the second wave beam.Have one to set between first wave beam and the second wave beam
Clamp angle；First wave beam and the second wave beam are orthogonal.
Two adjacent base stations are utilized respectively one group of wave beam of identical and are scanned in the cell for being covered, including：Each
Base station is by this cell of one group of wave cover；By one group of wave beam along the direction of setting, such as clockwise direction or inverse time
Pin direction, carries out spacescan to this cell with the discrete angular for setting, wherein, the angle organized in scanning process between interior wave beam is protected
Hold constant.The information of the potential pairing users of CoMP of acquisition includes the wave beam sequence number residing for the potential pairing users of CoMP and scanning time
Number.
Step 102：The information of the potential pairing users of CoMP of other side's cell that each base station is obtained according to interaction respectively, obtains
Obtain the CoMP pairing users of this cell and adjacent cell.
Wherein, the information of the potential pairing users of the CoMP of other side's cell that each base station is obtained according to interaction respectively, judges
Two are located at whether this cell pairing user potential with the CoMP of adjacent cell is in one group of wave beam not in scanning respectively
In with wave beam, if it is, determining described two little for this positioned at this cell pairing user potential with the CoMP of adjacent cell respectively
The CoMP pairing users of area and adjacent cell.
Step 103：Each base station is true according to the information of the CoMP pairing users of the packet beamforming matrix and this cell of construction
The CoMP of fixed this cell matches the CoMP pre-coding matrixes of user, wherein, packet beamforming matrix is according to one group of beam configurations.
Here,Wherein, WpFor CoMP pre-coding matrixes,For the packet beamforming matrix
Nth column vector, M is transmitting antenna number, and n is scanning times, and θ is scanning step angle.
Step 104：When CoMP pairing telex network of this cell with adjacent cell, each base station is determined using itself
CoMP pre-coding matrixes, carry out precoding processing to the signal of the CoMP pairing users of this cell.
Two embodiments are set forth below to detailed explaining being carried out based on the CoMP method for precoding of packet wave beam shown in Fig. 1
State.
One embodiment, the number of users of neighbor cell is 2, and Base Transmitter antenna number M=4, the Base Transmitter number of plies are 2
Layer, one layer of each CU, then one group of wave beam include two wave beams, and described two wave beams are orthogonal.
As described in step 101, two adjacent base stations are utilized respectively one group of wave beam of identical to be carried out in the cell for being covered
Scanning, searches the user in this cell edge as the potential pairing users of CoMP, and obtains the letter of the potential pairing users of CoMP
Breath.When initial, the first wave beam, the second wave beam are fixed beam and orthogonal, wherein, cell is according to the angle of its coverage by the
One group of wave cover of one wave beam and the second wave beam composition；Then one group of wave beam carries out spacescan along clockwise direction,
The overlay area of hypothesis cell is 2 π/3 radians, and the wave beam three dB bandwidth of 4 antenna arrays is π/12 radian, then with discrete angular π/12
Radian carries out spacescan, and the quadrature position of wave beam in group is remained when scanning, then scanning can cover for 4 times whole little
Area.
When being scanned, the position of wave beam according to residing for scanning beam estimates intra-cell users.Investigate adjacent first
Cell and second community, in first community, when being located in the first wave beam in cell edge first user, then select first to use
CoMP potential pairing user of the family for first community.In the same manner, in second community, when the second user in cell edge is located at
In second wave beam, then second user is selected to be the potential pairing user of second community CoMP.
As described in step 102, respectively by interface, such as X2 interface, interaction obtains the CoMP of other side's cell and dives for each base station
Pairing user information, i.e., base station from the base station of first community to second community transmission first user residing for wave beam sequence number and
Scanning angle, base station transmission second user from the base station of second community to first community residing for wave beam sequence number and scanning angle,
Scanning angle is characterized using discrete scanning times, and the quantity of information of so actual interaction is simultaneously little.Then each base station basis respectively
The information of the potential pairing users of CoMP of the other side that interaction is obtained, judges that two CoMP respectively positioned at this cell with adjacent cell dive
Whether it is in the different beams of one group of wave beam when user is matched in scanning, if it is, determining described two difference
Positioned at the CoMP pairing users that this cell pairing user potential with the CoMP of adjacent cell is this cell and adjacent cell.
As described in step 103, packet beamforming matrix W of each base station according to constructionSAnd the CoMP pairings of this cell are used
The information at family, such as first user are in the first wave beam, and discrete scanning angle now is π/12 radian, and scanning times are n1
=1；Second user is in the second wave beam, and discrete scanning angle π/12 radian now, and scanning times are n2=3, it is determined that
The CoMP of this cell matches the CoMP pre-coding matrixes of user.In first community, the CoMP pre-coding matrixes of first user are Wp1,
The CoMP pre-coding matrix W of second user in second communityp2, WS、Wp1、Wp2It is as follows：
As described in step 104, when CoMP pairing telex network of this cell with adjacent cell, each base station is true using itself
Fixed CoMP pre-coding matrixes, carry out precoding processing to the signal of the CoMP pairing users of this cell.The signal of first user
S1The transmission signal after precoding processing is carried out for Wp1S1, in the same manner, the signal S of second user2Carry out the transmitting after precoding processing
Signal is Wp2S2。
Another embodiment, the number of users of neighbor cell is 2, and Base Transmitter antenna number M=4, the Base Transmitter number of plies are 4
Layer, each CU two-layer, then one group of wave beam include two wave beams, and described two wave beams are orthogonal.
As described in step 101, two adjacent base stations are utilized respectively one group of wave beam of identical to be carried out in the cell for being covered
Scanning, searches the user in this cell edge as the potential pairing users of CoMP, and obtains the letter of the potential pairing users of CoMP
Breath.When initial, the first wave beam, the second wave beam are fixed beam and orthogonal, wherein, cell is according to the angle of its coverage by the
One group of wave cover of one wave beam and the second wave beam composition；Then one group of wave beam carries out spacescan along clockwise direction,
The overlay area of hypothesis cell is 2 π/3 radians, and the wave beam three dB bandwidth of 4 antenna arrays is π/12 radian, then with discrete angular π/12
Radian carries out spacescan, and the quadrature position of wave beam in group is remained when scanning, then scanning can cover for 4 times whole little
Area.
When being scanned, the position of wave beam according to residing for scanning beam estimates intra-cell users.Investigate adjacent first
Cell and second community, in first community, when being located in the first wave beam in cell edge first user, then select first to use
CoMP potential pairing user of the family for first community.In the same manner, in second community, when the second user in cell edge is located at
In second wave beam, then second user is selected to be the potential pairing user of second community CoMP.
As described in step 102, respectively by interface, such as X2 interface, interaction obtains the CoMP of other side's cell and dives for each base station
Pairing user information, i.e., base station from the base station of first community to second community transmission first user residing for wave beam sequence number and
Scanning angle, base station transmission second user from the base station of second community to first community residing for wave beam sequence number and scanning angle,
Scanning angle is characterized using discrete scanning times, and the quantity of information of so actual interaction is simultaneously little.Then each base station basis respectively
The information of the potential pairing users of CoMP of the other side that interaction is obtained, judges that two CoMP respectively positioned at this cell with adjacent cell dive
Whether it is in the different beams of one group of wave beam when user is matched in scanning, if it is, determining described two difference
Positioned at the CoMP pairing users that this cell pairing user potential with the CoMP of adjacent cell is this cell and adjacent cell.
As described in step 103, packet beamforming matrix W of each base station according to constructionTAnd the CoMP pairings of this cell are used
The information at family, such as first user are in the first wave beam, and discrete scanning angle now is π/12 radian, and scanning times are n1
=1；Second user is in the second wave beam, and discrete scanning angle π/12 radian now, and scanning times are n2=3, it is determined that
The CoMP of this cell matches the CoMP pre-coding matrixes of user.In first community, the CoMP pre-coding matrixes of first user are Wp1,
The CoMP pre-coding matrix W of second user in second communityp2, WT、Wp1、Wp2It is as follows：
As described in step 104, when CoMP pairing telex network of this cell with adjacent cell, each base station is true using itself
Fixed CoMP pre-coding matrixes, carry out precoding processing to the signal of the CoMP pairing users of this cell.The signal of first user
S1The transmission signal after precoding processing is carried out for Wp1S1, in the same manner, the signal S of second user2Carry out the transmitting after precoding processing
Signal is Wp2S2。
Schematic diagrams of the Fig. 2 for the packet wave beam of the embodiment of the present invention, shown in Figure 2, the first wave beam and the second wave beam structure
Into one group of wave beam, and the first wave beam is orthogonal with the second wave beam.
Fig. 3 applies the schematic diagram in neighbor cell for present invention method, shown in Figure 3, in different districts
One user is located in two different wave beams in same group of wave beam with second user, wherein, the first of first community edge
User is located in the first wave beam, and the second user of second community edge is located in the second wave beam, then select first user and the
Two users are the potential pairing users of CoMP.Therefore, first user and second user be when CoMP precodings are done, and wave beam is not each other
Interfere with each other so that systematic entirety preferably can be improved.
Structural representations of the Fig. 4 for apparatus of the present invention embodiment.
Shown in Figure 4, a kind of device of the CoMP precodings based on packet wave beam provided in an embodiment of the present invention includes：
Scan module 41, device information interaction and CoMP pairing user's selecting module 42, pre-coding matrix determining module 43, precoding
Module 44.
Scan module 41, for being scanned in the cell for being covered using one group of wave beam, is searched in this cell side
The user of edge is used as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP；
Device information interaction and CoMP pairing users selecting module 42, for according to the interactive other side's cell for obtaining
The information of the potential pairing users of CoMP, obtains the CoMP pairing users of this cell and adjacent cell；
Pre-coding matrix determining module 43, for the CoMP pairing users of the packet beamforming matrix and this cell according to construction
Information determine this cell CoMP match user CoMP pre-coding matrixes, wherein, packet beamforming matrix according to described one group
Beam configurations；
Precoding module 44, for when the CoMP of this cell and adjacent cell matches telex network, using pre-coding matrix
The CoMP pre-coding matrixes that determining module 43 determines, carry out precoding processing to the signal of the CoMP pairing users of this cell.
Here, one group of wave beam includes the first wave beam and the second wave beam.Have one to set between first wave beam and the second wave beam
Clamp angle；First wave beam and the second wave beam are orthogonal.
The scan module 41 includes：Overlay module, for by this cell of one group of wave cover；Discrete scanning mould
Block, for the direction for setting one group of wave beam edge, such as clockwise or counterclockwise, with the discrete angular for setting
Spacescan is carried out to this cell, wherein, the angle between interior wave beam is organized in scanning process and keeps constant.The CoMP of acquisition is potential to be matched somebody with somebody
Wave beam sequence number and scanning times residing for the potential pairing users of CoMP are included to the information of user.
Described device information interaction and CoMP pairing users selecting module 42, for the other side's cell obtained according to interaction
CoMP it is potential pairing user information, judge two respectively be located at this cell it is potential with the CoMP of adjacent cell match user sweeping
Whether it is in when retouching in the different beams of one group of wave beam, if it is, determining described two this cell that are located at respectively with neighbour
The potential pairing users of CoMP of cell are the CoMP pairing users of this cell and adjacent cell.
The pre-coding matrix determining module 43 is matched for the CoMP of packet beamforming matrix and this cell according to construction
The information of user determines that the CoMP of this cell matches the CoMP pre-coding matrix W of userp,Wherein, Wp
For CoMP pre-coding matrixes,For the vector of the Nth column of the packet beamforming matrix, M is transmitting antenna number, and n is scanning
Number of times, θ are scanning step angle.
As seen through the above technical solutions, in embodiments of the present invention, two adjacent base stations are utilized respectively one group of identical
Wave beam is scanned in the cell for being covered, and searches the user in this cell edge as the potential pairing users of CoMP, and
Obtain the information of the potential pairing users of CoMP；The potential pairings of CoMP of other side's cell that each base station is obtained according to interaction respectively are used
The information at family, obtains the CoMP pairing users of this cell and adjacent cell；Each base station is according to the packet beamforming matrix for constructing and originally
The information of the CoMP pairing users of cell determines that the CoMP of this cell matches the CoMP pre-coding matrixes of user, wherein, it is grouped ripple
Beam matrix is according to one group of beam configurations；When CoMP pairing telex network of this cell with adjacent cell, each base station utilizes
The CoMP pre-coding matrixes that itself determines, carry out precoding processing to the signal of the CoMP pairing users of this cell.Therefore, this
Bright embodiment can realize efficient, high-precision CoMP precoding processings so that each user is not used to other pairings
Family produces interference, so as to improve the performance of whole system.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications and modification to the present invention belong to the model of the claims in the present invention and its equivalent technologies
Within enclosing, then the present invention is also intended to comprising these changes and modification.
Claims (14)
1. it is a kind of based on packet wave beam coordinated multipoint transmission CoMP precodings method, it is characterised in that the method includes：
Two adjacent base stations are utilized respectively one group of wave beam of identical and are scanned in the cell for being covered, and search in this cell
The user at edge is used as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP；
The information of the potential pairing users of the CoMP in other side's cell that each base station is obtained according to interaction respectively, obtains this cell
With the CoMP pairing users of adjacent cell；
Each base station determines this cell according to the information of the CoMP pairing users of the packet beamforming matrix and this cell of construction
CoMP matches the CoMP pre-coding matrixes of user, wherein, packet beamforming matrix is according to one group of beam configurations；
When CoMP pairing telex network of this cell with adjacent cell, the CoMP precoding squares that each base station is determined using itself
Battle array, carries out precoding processing to the signal of the CoMP pairing users of this cell；
Wherein, each base station determines this cell according to the information of the CoMP pairing users of the packet beamforming matrix and this cell of construction
CoMP pairing user CoMP pre-coding matrixes include：
Wherein, WpFor CoMP pre-coding matrixes,For the Nth column for being grouped beamforming matrix
Vector, M are transmitting antenna number, and n is scanning times, and θ is scanning step angle.
2. the method for claim 1, it is characterised in that one group of wave beam includes the first wave beam and the second wave beam, and,
There is a setting angle between first wave beam and the second wave beam.
3. method as claimed in claim 2, it is characterised in that the first wave beam and the second wave beam are orthogonal.
4. the method for claim 1, it is characterised in that two adjacent base stations are utilized respectively one group of wave beam of identical in institute
It is scanned in the cell of covering, including：
Each base station is by this cell of one group of wave cover；
By one group of wave beam along the direction of setting, spacescan is carried out to this cell with the discrete angular for setting, wherein, scanning
During angle in group between wave beam keep constant.
5. method as claimed in claim 4, it is characterised in that the direction for setting is clockwise or counterclockwise side
To.
6. the method for claim 1, it is characterised in that the information of the potential pairing user of the CoMP includes that CoMP is potential
Wave beam sequence number and scanning times residing for pairing user.
7. the method for claim 1, it is characterised in that other side's cell that each base station is obtained according to interaction respectively
The information of the potential pairing users of CoMP, the CoMP pairing users for obtaining this cell with adjacent cell include：
The information of the potential pairing users of CoMP of other side's cell that each base station is obtained according to interaction respectively, judges two difference positions
Whether it is in the different beams of one group of wave beam, such as when this cell pairing user potential with the CoMP of adjacent cell is in scanning
It is really, it is determined that described two potential pairing users of CoMP respectively positioned at this cell and adjacent cell are this cell and adjacent cell
CoMP matches user.
8. it is a kind of based on packet wave beam coordinated multipoint transmission CoMP precodings device, it is characterised in that the device includes：
Scan module, for being scanned in the cell for being covered using one group of wave beam, searches the use in this cell edge
Family is used as the potential pairing users of CoMP, and obtains the information of the potential pairing users of CoMP；
Device information interaction and CoMP pairing user's selecting modules, the CoMP of the other side's cell for being obtained according to interaction are potential
The information of pairing user, obtains the CoMP pairing users of this cell and adjacent cell；
Pre-coding matrix determining module, for the information of user is matched according to the CoMP of the packet beamforming matrix and this cell of construction
Determine that the CoMP of this cell matches the CoMP pre-coding matrixes of user, wherein, packet beamforming matrix is according to one group of wave beam structure
Make；
Precoding module, for when the CoMP of this cell and adjacent cell matches telex network, determining mould using pre-coding matrix
The CoMP pre-coding matrixes that block determines, carry out precoding processing to the signal of the CoMP pairing users of this cell；
Wherein, the pre-coding matrix determining module is used for the CoMP pairings of packet beamforming matrix and this cell according to construction
The information at family determines that the CoMP of this cell matches the CoMP pre-coding matrix W of userp,Wherein, WpFor
CoMP pre-coding matrixes,For the vector of the Nth column of the packet beamforming matrix, M is transmitting antenna number, and n is scanning time
Number, θ are scanning step angle.
9. device as claimed in claim 8, it is characterised in that one group of wave beam includes the first wave beam and the second wave beam, and,
There is a setting angle between first wave beam and the second wave beam.
10. device as claimed in claim 9, it is characterised in that the first wave beam and the second wave beam are orthogonal.
11. devices as claimed in claim 8, it is characterised in that the scan module includes：
Overlay module, for by this cell of one group of wave cover；
Discrete scan module, is carried out to this cell with the discrete angular for setting along the direction of setting for by one group of wave beam
Spacescan, wherein, the angle between interior wave beam is organized in scanning process and keeps constant.
12. devices as claimed in claim 11, it is characterised in that the direction for setting is as clockwise or square counterclockwise
To.
13. devices as claimed in claim 8, it is characterised in that the potential information for matching user of the CoMP includes that CoMP dives
In wave beam sequence number and scanning times residing for pairing user.
14. devices as claimed in claim 8, it is characterised in that described device information interaction and CoMP pairing users select
Module, the information of the potential pairing users of CoMP of the other side's cell for being obtained according to interaction, judges two respectively positioned at originally little
Whether area pairing user potential with the CoMP of adjacent cell is in the different beams of one group of wave beam in scanning, if it is,
Then determine described two respectively positioned at the CoMP that this cell pairing user potential with the CoMP of adjacent cell is this cell and adjacent cell
Pairing user.
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| CN102088779A (en) * | 2009-12-04 | 2011-06-08 | 电子科技大学 | Efficient feedback method aiming at beamforming of closed loop coordinated multipoint transmission |
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| CN101621319A (en) * | 2009-07-23 | 2010-01-06 | 北京航空航天大学 | Multi-cell cooperative downlink transmission user pairing method based on large-scale channel information |
| CN102088779A (en) * | 2009-12-04 | 2011-06-08 | 电子科技大学 | Efficient feedback method aiming at beamforming of closed loop coordinated multipoint transmission |
| CN102065558A (en) * | 2011-01-07 | 2011-05-18 | 中兴通讯股份有限公司 | Double-codebook multipoint coordinated joint beamforming data transmission method and system |
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