CN102916784A - Method and device for pre-coding coordinated-multiple-point transmission based on grouped wave beam - Google Patents

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

A kind of method and device of coordinated multipoint transmission precoding of group-based wave beam

Technical field

The present invention relates to wireless communication field, particularly a kind of method and device of coordinated multipoint transmission precoding of group-based wave beam.

Background technology

Coordinated multipoint transmission (Coordinated Multiple Point, CoMP) technology is Long Term Evolution (LongTerm Evolution-Advanced, LTE-A) system enlarges the network edge covering, guarantees edge customer service quality (Quality of Service, QoS) one of important technology is the exclusive technology of LTE-A system.The CoMP technology is by mutual mobile subscriber's channel information between adjacent base station, adjacent base station takes certain interference avoidance strategy or a plurality of base station that the mobile subscriber is carried out joint transmission to disturbed user, mainly for Cell Edge User, to reduce the interference of edge customer, improve throughput and the spectrum utilization efficiency of cell edge data.

In the LTE-A system, CoMP comprises two kinds of scenes: cooperation between base stations and distributing antenna system.From data flow always, CoMP can be divided into again descending transmission CoMP and uplink receiving CoMP.Descending transmission CoMP comprises two class technology: cooperative scheduling and beam forming, Combined Treatment and transmission.And for uplink receiving CoMP, then only have to unite to receive and a kind of technology of processing.

When signal is carried out the CoMP precoding processing, at first to determine CoMP excited users collection in the prior art, then adopt the channel relevancy dispatching criterion to select each other user's set of channel relevancy minimum, as final CoMP transmission user collection; Then concentrate each user's channel condition information according to the CoMP transmission user, the design pre-coding matrix like this, will select two processes of user and design matrix separately to carry out, and reduce the signal precoding treatment effeciency, thereby affect the performance of whole system again.

A kind of indicating means and system of extra pre-coding matrix index have been provided in the prior art, the method comprises: subscriber equipment is determined extra pre-coding matrix index type, in ascending control information, carry the indication information that is used to indicate extra pre-coding matrix index type, send to the base station; Perhaps, extra pre-coding matrix index type is determined in the base station, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to subscriber equipment.Wherein, described extra pre-coding matrix index type is for preferably matching pre-coding matrix index or the poorest pairing pre-coding matrix index.The method adopts the precoding processing of codebook mode, can bring certain loss on the precision.

Summary of the invention

The embodiment of the invention provides a kind of method and device of CoMP precoding of group-based wave beam, high efficiency in order to realize, high-precision CoMP precoding processing.

The method of the CoMP precoding of a kind of group-based wave beam that the embodiment of the invention provides comprises:

Two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information;

Each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information;

The CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations;

When the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.

The device of the CoMP precoding of a kind of group-based wave beam that the embodiment of the invention provides comprises:

Scan module is used for utilizing one group of wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information;

Device information interaction and CoMP pairing user selection module are used for the information according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user, obtain the CoMP pairing user of this residential quarter and adjacent cell;

The pre-coding matrix determination module is used for determining according to the CoMP pairing user's of the grouping beamforming matrix of structure and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix, and wherein, the grouping beamforming matrix is according to described one group of beam configurations;

Precoding module is used for utilizing the definite CoMP pre-coding matrix of pre-coding matrix determination module when the CoMP of this residential quarter and adjacent cell pairing telex network, the CoMP of this residential quarter is matched user's signal carry out precoding processing.

As seen through the above technical solutions, in embodiments of the present invention, two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information; Each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information; The CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations; When the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.The method of the embodiment of the invention is when the potential pairing of CoMP user is searched in scanning, needed CoMP pairing user's information when just having obtained definite CoMP pre-coding matrix, then after mutual this information is determined the CoMP pairing user of this residential quarter and adjacent cell between the base station, just can directly determine the CoMP pre-coding matrix, therefore, the embodiment of the invention can realize high efficiency, high-precision CoMP precoding processing, so that each user does not produce interference to other pairing users, thereby improve the performance of whole system.

Description of drawings

Fig. 1 is the schematic flow sheet of the specific embodiment of the inventive method;

Fig. 2 is the schematic diagram of the grouping wave beam of the embodiment of the invention;

Fig. 3 is the schematic diagram that embodiment of the invention method is applied in neighbor cell;

Fig. 4 is the structural representation of apparatus of the present invention embodiment.

Embodiment

Method and the device of the CoMP precoding of a kind of group-based wave beam that the embodiment of the invention provides, the method comprises: two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, search is in the user of this cell edge as the potential pairing of CoMP user, and obtains the potential pairing of CoMP user's information; Each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information; The CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations; When the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.

Fig. 1 is the schematic flow sheet of the specific embodiment of the inventive method.

Referring to shown in Figure 1, the method for the CoMP precoding of a kind of group-based wave beam that the embodiment of the invention provides may further comprise the steps:

Step 101: two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information.

Here, described one group of wave beam comprises the first wave beam and the second wave beam.Have one to set angle between the first wave beam and the second wave beam; The first wave beam and the second wave beam quadrature.

Two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and comprising: each base station covers this residential quarter with described one group of wave beam; Along the direction of setting, for example clockwise direction or counter clockwise direction are carried out spacescan with the discrete angle of setting to this residential quarter with described one group of wave beam, and wherein, the angle in the scanning process between the interior wave beam of group remains unchanged.The potential pairing of the CoMP that obtains user's information comprises the residing wave beam sequence number of the potential pairing of CoMP user and scanning times.

Step 102: each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information.

Wherein, each base station is respectively according to the potential information of matching the user of the CoMP of the other side residential quarter that obtains alternately, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

Step 103: the CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations.

Here, $W_p=e^{\mathrm{jf}\left(\mathrm{n\θ}\right)}\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right),$ Wherein, W _pBe the CoMP pre-coding matrix, $\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right)$ Be the vector of the N of described grouping beamforming matrix row, M is number of transmit antennas, and n is scanning times, and θ is scanning stepping angle.

Step 104: when the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.

The below's row are explained in detail the CoMP method for precoding of group-based wave beam shown in Figure 1 for two example two.

An embodiment, the number of users of neighbor cell is 2, and base station transmit antennas is counted M=4, and the base station emission number of plies is 2 layers, each CU one deck, then one group of wave beam comprises two wave beams, and described two wave beam quadratures.

As described in step 101, two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information.When initial, the first wave beam, the second wave beam are fixed beam and quadrature, and wherein, the residential quarter is covered by one group of wave beam of the first wave beam and the second wave beam composition according to the angle of its coverage; Then described one group of wave beam carries out spacescan along clockwise direction, the overlay area of supposing the residential quarter is 2 π/3 radians, the wave beam three dB bandwidth of 4 antenna arrays is π/12 radians, then carry out spacescan with discrete angle π/12 radians, and remain the quadrature position of wave beam in the group during scanning, scan so 4 times and can cover whole residential quarter.

When scanning, estimate the position of user's wave beam of living in the residential quarter according to scanning beam.Investigate the first adjacent residential quarter and the second residential quarter, in the first residential quarter, to be positioned at first wave intrafascicular when being in the cell edge first user, and then selecting first user is the potential pairing of the CoMP user of the first residential quarter.In like manner, in the second residential quarter, to be positioned at Second Wave intrafascicular as the second user who is in cell edge, and then selecting the second user is the potential pairing of the second residential quarter CoMP user.

As described in step 102, interface is passed through respectively in each base station, such as X2 interface, obtain alternately the potential pairing of the CoMP user's of the other side residential quarter information, namely the residing wave beam sequence number of first user and scanning angle are transmitted to the base station of the second residential quarter in the base station of the first residential quarter, the residing wave beam sequence number of the second user and scanning angle are transmitted in the base station of the second residential quarter to the base station of the first residential quarter, scanning angle adopts discrete scanning times to characterize, so actual mutual amount of information and little.Then each base station is respectively according to the potential information of matching the user of the other side's who obtains alternately CoMP, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

As described in step 103, each base station is according to the grouping beamforming matrix W of structure _SAnd the CoMP of this residential quarter pairing user's information, it is intrafascicular to be in first wave such as first user, and the discrete scanning angle of this moment is π/12 radians, and scanning times is n ₁=1; It is intrafascicular that the second user is in Second Wave, and the discrete scanning angle π of this moment/12 radians, and scanning times is n ₂=3, determine the CoMP pairing user's of this residential quarter CoMP pre-coding matrix.The CoMP pre-coding matrix of first user is W in the first residential quarter _P1, the second user's CoMP pre-coding matrix W in the second residential quarter _P2, W _S, W _P1, W _P2As follows:

$W_S=\left(\begin{array}{cc}{w}_{11}& w_{12}\\ w_{21}& w_{22}\\ w_{31}& w_{32}\\ w_{41}& w_{42}\end{array}\right),$ $W_{p1}=e^{\mathrm{jf}\left(\frac{\mathrm{\π}}{12}\right)}\left(\begin{array}{c}{w}_{11}\\ w_{21}\\ w_{31}\\ w_{41}\end{array}\right),$ $W_{p2}=e^{\mathrm{jf}\left(\frac{\mathrm{\π}}{4}\right)}\left(\begin{array}{c}{w}_{12}\\ w_{22}\\ w_{32}\\ w_{42}\end{array}\right)$

As described in step 104, when the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.The signal S of first user ₁Carry out transmitting after the precoding processing and be W _P1S ₁, in like manner, the second user's signal S ₂Carry out transmitting after the precoding processing and be W _P2S ₂

Another embodiment, the number of users of neighbor cell is 2, and base station transmit antennas is counted M=4, and the base station emission number of plies is 4 layers, and each CU is two-layer, and then one group of wave beam comprises two wave beams, and described two wave beam quadratures.

As described in step 101, two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information.When initial, the first wave beam, the second wave beam are fixed beam and quadrature, and wherein, the residential quarter is covered by one group of wave beam of the first wave beam and the second wave beam composition according to the angle of its coverage; Then described one group of wave beam carries out spacescan along clockwise direction, the overlay area of supposing the residential quarter is 2 π/3 radians, the wave beam three dB bandwidth of 4 antenna arrays is π/12 radians, then carry out spacescan with discrete angle π/12 radians, and remain the quadrature position of wave beam in the group during scanning, scan so 4 times and can cover whole residential quarter.

When scanning, estimate the position of user's wave beam of living in the residential quarter according to scanning beam.Investigate the first adjacent residential quarter and the second residential quarter, in the first residential quarter, to be positioned at first wave intrafascicular when being in the cell edge first user, and then selecting first user is the potential pairing of the CoMP user of the first residential quarter.In like manner, in the second residential quarter, to be positioned at Second Wave intrafascicular as the second user who is in cell edge, and then selecting the second user is the potential pairing of the second residential quarter CoMP user.

As described in step 102, interface is passed through respectively in each base station, such as X2 interface, obtain alternately the potential pairing of the CoMP user's of the other side residential quarter information, namely the residing wave beam sequence number of first user and scanning angle are transmitted to the base station of the second residential quarter in the base station of the first residential quarter, the residing wave beam sequence number of the second user and scanning angle are transmitted in the base station of the second residential quarter to the base station of the first residential quarter, scanning angle adopts discrete scanning times to characterize, so actual mutual amount of information and little.Then each base station is respectively according to the potential information of matching the user of the other side's who obtains alternately CoMP, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

As described in step 103, each base station is according to the grouping beamforming matrix W of structure _TAnd the CoMP of this residential quarter pairing user's information, it is intrafascicular to be in first wave such as first user, and the discrete scanning angle of this moment is π/12 radians, and scanning times is n ₁=1; It is intrafascicular that the second user is in Second Wave, and the discrete scanning angle π of this moment/12 radians, and scanning times is n ₂=3, determine the CoMP pairing user's of this residential quarter CoMP pre-coding matrix.The CoMP pre-coding matrix of first user is W in the first residential quarter _P1, the second user's CoMP pre-coding matrix W in the second residential quarter _P2, W _T, W _P1, W _P2As follows:

$W_T=\left(\begin{array}{cccc}{w}_{\mathrm{1,11}}& w_{\mathrm{1,12}}& w_{\mathrm{2,13}}& w_{\mathrm{2,14}}\\ w_{\mathrm{1,21}}& w_{\mathrm{1,22}}& w_{\mathrm{2,23}}& w_{\mathrm{2,24}}\\ w_{\mathrm{1,31}}& w_{\mathrm{1,32}}& w_{\mathrm{2,33}}& w_{\mathrm{2,34}}\\ w_{\mathrm{1,41}}& w_{\mathrm{1,42}}& w_{\mathrm{2,43}}& w_{\mathrm{2,44}}\end{array}\right),$ $W_{p1}=e^{\mathrm{jf}\left(\frac{\mathrm{\π}}{12}\right)}\left(\begin{array}{cc}{w}_{\mathrm{1,11}}& w_{\mathrm{1,12}}\\ w_{\mathrm{1,21}}& w_{\mathrm{1,22}}\\ w_{\mathrm{1,31}}& w_{\mathrm{1,32}}\\ w_{\mathrm{1,41}}& w_{\mathrm{1,42}}\end{array}\right),$ $W_{p2}=e^{\mathrm{jf}\left(\frac{\mathrm{\π}}{4}\right)}\left(\begin{array}{cc}{w}_{\mathrm{2,13}}& w_{\mathrm{2,14}}\\ w_{\mathrm{2,23}}& w_{\mathrm{2,24}}\\ w_{\mathrm{2,33}}& w_{\mathrm{2,34}}\\ w_{\mathrm{2,43}}& w_{\mathrm{2,44}}\end{array}\right)$

As described in step 104, when the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.The signal S of first user ₁Carry out transmitting after the precoding processing and be W _P1S ₁, in like manner, the second user's signal S ₂Carry out transmitting after the precoding processing and be W _P2S ₂

Fig. 2 is the schematic diagram of the grouping wave beam of the embodiment of the invention, and referring to shown in Figure 2, the first wave beam and the second wave beam consist of one group of wave beam, and the first wave beam and the second wave beam quadrature.

Fig. 3 is the schematic diagram that embodiment of the invention method is applied in neighbor cell, referring to shown in Figure 3, first user and second user's different districts are arranged in two different wave beams of same group of wave beam in the different districts, wherein, it is intrafascicular that the first user at the first cell edge place is positioned at first wave, it is intrafascicular that second user at the second cell edge place is positioned at Second Wave, and then selecting first user and the second user is the potential pairing of CoMP user.Therefore, first user and the second user are when doing the CoMP precoding, and wave beam does not interfere with each other each other, so that the entire system performance is improved preferably.

Fig. 4 is the structural representation of apparatus of the present invention embodiment.

Referring to shown in Figure 4, the device of the CoMP precoding of a kind of group-based wave beam that the embodiment of the invention provides comprises: scan module 41, device information interaction and CoMP pairing user selection module 42, pre-coding matrix determination module 43, precoding module 44.

Scan module 41 is used for utilizing one group of wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information;

Device information interaction and CoMP pairing user selection module 42 are used for the information according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user, obtain the CoMP pairing user of this residential quarter and adjacent cell;

Pre-coding matrix determination module 43 is used for determining according to the CoMP pairing user's of the grouping beamforming matrix of structure and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix, and wherein, the grouping beamforming matrix is according to described one group of beam configurations;

Precoding module 44 is used for when the CoMP of this residential quarter and adjacent cell pairing telex network, utilizes the definite CoMP pre-coding matrix of pre-coding matrix determination module 43, the CoMP of this residential quarter is matched user's signal carry out precoding processing.

Here, described one group of wave beam comprises the first wave beam and the second wave beam.Have one to set angle between the first wave beam and the second wave beam; The first wave beam and the second wave beam quadrature.

Described scan module 41 comprises: overlay module is used for described one group of wave beam is covered this residential quarter; Discrete scan module, be used for will described one group of wave beam along the direction of setting, for example clockwise direction or counterclockwise carries out spacescan with the discrete angle of setting to this residential quarter, wherein, the angle in the scanning process between the interior wave beam of group remains unchanged.The potential pairing of the CoMP that obtains user's information comprises the residing wave beam sequence number of the potential pairing of CoMP user and scanning times.

Described device information interaction and CoMP pairing user selection module 42, be used for the information according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

Described pre-coding matrix determination module 43 is used for determining according to the CoMP pairing user's of the grouping beamforming matrix of structure and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix W _p, $W_p=e^{\mathrm{jf}\left(\mathrm{n\θ}\right)}\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right),$ Wherein, W _pBe the CoMP pre-coding matrix, $\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right)$ Be the vector of the N of described grouping beamforming matrix row, M is number of transmit antennas, and n is scanning times, and θ is scanning stepping angle.

As seen through the above technical solutions, in embodiments of the present invention, two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information; Each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information; The CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations; When the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.Therefore, the embodiment of the invention can realize high efficiency, high-precision CoMP precoding processing, so that each user does not produce interference to other pairing users, thereby improves the performance of whole system.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (16)

1. the method for the coordinated multipoint transmission CoMP precoding of a group-based wave beam is characterized in that the method comprises:

Two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information;

Each base station obtains the CoMP pairing user of this residential quarter and adjacent cell respectively according to the potential pairing of the CoMP that is in the other side residential quarter that obtains alternately user's information;

The CoMP pairing user's of this residential quarter CoMP pre-coding matrix is determined according to the grouping beamforming matrix of structure and the CoMP of this residential quarter pairing user's information in each base station, and wherein, the grouping beamforming matrix is according to described one group of beam configurations;

When the CoMP of this residential quarter and adjacent cell pairing telex network, each base station utilizes the CoMP pre-coding matrix of self determining, the CoMP pairing user's of this residential quarter signal is carried out precoding processing.

2. the method for claim 1 is characterized in that, described one group of wave beam comprises the first wave beam and the second wave beam, and, have one to set angle between the first wave beam and the second wave beam.

3. method as claimed in claim 2 is characterized in that, the first wave beam and the second wave beam quadrature.

4. the method for claim 1 is characterized in that, two adjacent base stations utilize respectively one group of identical wave beam to scan in the residential quarter that covers, and comprising:

Each base station covers this residential quarter with described one group of wave beam;

Described one group of wave beam along the direction of setting, is carried out spacescan with the discrete angle of setting to this residential quarter, and wherein, the angle in the scanning process between the interior wave beam of group remains unchanged.

5. method as claimed in claim 4 is characterized in that, the direction of described setting is clockwise direction or counter clockwise direction.

6. the method for claim 1 is characterized in that, the potential pairing of described CoMP user's information comprises the residing wave beam sequence number of the potential pairing of CoMP user and scanning times.

7. the method for claim 1 is characterized in that, each base station is respectively according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user's information, and the CoMP pairing user who obtains this residential quarter and adjacent cell comprises:

Each base station is respectively according to the potential information of matching the user of the CoMP of the other side residential quarter that obtains alternately, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

8. the method for claim 1 is characterized in that, each base station determines that according to the CoMP pairing user's of the grouping beamforming matrix of constructing and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix comprises:

$W_p=e^{\mathrm{jf}\left(\mathrm{n\θ}\right)}\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right),$ Wherein, W _pBe the CoMP pre-coding matrix, $\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right)$ Be the vector of the N of described grouping beamforming matrix row, M is number of transmit antennas, and n is scanning times, and θ is scanning stepping angle.

9. the device of the coordinated multipoint transmission CoMP precoding of a group-based wave beam is characterized in that this device comprises:

Scan module is used for utilizing one group of wave beam to scan in the residential quarter that covers, and the user that search is in this cell edge is as the potential pairing of CoMP user, and the potential pairing of acquisition CoMP user's information;

Device information interaction and CoMP pairing user selection module are used for the information according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user, obtain the CoMP pairing user of this residential quarter and adjacent cell;

The pre-coding matrix determination module is used for determining according to the CoMP pairing user's of the grouping beamforming matrix of structure and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix, and wherein, the grouping beamforming matrix is according to described one group of beam configurations;

Precoding module is used for utilizing the definite CoMP pre-coding matrix of pre-coding matrix determination module when the CoMP of this residential quarter and adjacent cell pairing telex network, the CoMP of this residential quarter is matched user's signal carry out precoding processing.

10. device as claimed in claim 9 is characterized in that, described one group of wave beam comprises the first wave beam and the second wave beam, and, have one to set angle between the first wave beam and the second wave beam.

11. device as claimed in claim 10 is characterized in that, the first wave beam and the second wave beam quadrature.

12. device as claimed in claim 9 is characterized in that, described scan module comprises:

Overlay module is used for described one group of wave beam is covered this residential quarter;

Discrete scan module is used for the direction of described one group of wave beam along setting carried out spacescan with the discrete angle of setting to this residential quarter, and wherein, the angle in organizing in the scanning process between wave beam remains unchanged.

13. device as claimed in claim 12 is characterized in that, the direction of described setting is clockwise direction or counter clockwise direction.

14. device as claimed in claim 9 is characterized in that, the potential pairing of described CoMP user's information comprises the residing wave beam sequence number of the potential pairing of CoMP user and scanning times.

15. device as claimed in claim 9, it is characterized in that, described device information interaction and CoMP pairing user selection module, be used for the information according to the potential pairing of the CoMP of the other side residential quarter that obtains alternately user, judge whether two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are in the different beams of described one group of wave beam when scanning, if so, determine that then described two the potential pairing of CoMP users that lay respectively at this residential quarter and adjacent cell are the CoMP pairing user of this residential quarter and adjacent cell.

16. device as claimed in claim 9 is characterized in that, described pre-coding matrix determination module is used for determining according to the CoMP pairing user's of the grouping beamforming matrix of structure and this residential quarter information the CoMP pairing user's of this residential quarter CoMP pre-coding matrix W _p, $W_p=e^{\mathrm{jf}\left(\mathrm{n\θ}\right)}\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right),$ Wherein, W _pBe the CoMP pre-coding matrix, $\left(\begin{array}{c}{w}_{1N}\\ w_{2N}\\ ...\\ w_{\mathrm{MN}}\end{array}\right)$ Be the vector of the N of described grouping beamforming matrix row, M is number of transmit antennas, and n is scanning times, and θ is scanning stepping angle.

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