CN105450279B

CN105450279B - A kind of method, apparatus and equipment for carrying out collaboration multi-point cooperative beam forming

Info

Publication number: CN105450279B
Application number: CN201410390810.2A
Authority: CN
Inventors: 赵松峄; 张碧军; 林凌峰
Original assignee: Nokia Shanghai Bell Co Ltd
Current assignee: Nokia Shanghai Bell Co Ltd
Priority date: 2014-08-08
Filing date: 2014-08-08
Publication date: 2018-10-12
Anticipated expiration: 2034-08-08
Also published as: CN105450279A

Abstract

The method that the present invention provides a kind of in the base station of LTE A networks for carrying out collaboration multi-point cooperative beam forming (CoMP CB).The method includes：It obtains to the channel information of each down channel of each user equipment；According to the channel information of each down channel, interconnection vector and the orderly base of association are determined for each down channel；According to each interconnection vector of each down channel, the label of each down channel is generated；According to the degree of correlation of the label of each down channel and each down channel being respectively associated between orderly base, user equipment is selected to carry out CoMP CB in the user equipment that this cell is serviced；Also, the method further includes that the message of the instruction selected user equipment in this base station is sent to other collaboration base stations.Compared with prior art, the present invention is based on the degrees of correlation between the interconnection vector of each down channel and each orderly base to select user equipment to carry out CoMP CB, reduce inter-user interference, improve system performance.

Description

A kind of method, apparatus and equipment for carrying out collaboration multi-point cooperative beam forming

Technical field

The present invention relates to wireless communication fields, more particularly to collaboration multi-point cooperative beam forming field.

Background technology

Since LTE system generally uses identical networking, Cell Edge User to be easy to be interfered by adjacent cell, so as to cause The performance of Cell Edge User is poor.In wireless communications, collaboration multiple spot technology (Coordinated Multi- can be used Point, CoMP) improve the service quality of Cell Edge User by the dynamic cooperative between multiple cells, improve cell side Edge handling capacity.Wherein, using collaboration multi-point cooperative beam forming (CoMP Coordinated Beamforming) technology, can lead to The collaborative beam forming of multiple minizones is crossed to avoid or inhibit the interference between neighboring community, is gulped down to effectively improve cell edge The amount of spitting.It is each to cooperate with how base station selects user equipment and carry out the interference coordination between collaboration base station to keep away under CoMP CB patterns Exempt from or reduce co-channel interference, and how to reduce implementation complexity of the generation for the pre-coding matrix of CoMP CB is to need to solve Certainly the problem of.

Invention content

The object of the present invention is to provide cooperate with multi-point cooperative beam forming for carrying out in the base station of LTE-A network The method and device of (CoMP CB) and a kind of base station including above-mentioned apparatus.

According to an aspect of the present invention, a kind of side in the base station of LTE-A network for carrying out CoMP CB is provided Method, wherein it includes multiple code books for answering the orderly bases of normal orthogonal that the LTE-A network, which uses, and between the multiple orderly base For Linear Rotation transformation relation, the method includes：

It obtains to the channel information of each down channel of each user equipment, each user equipment includes that this base station is taken The CoMP CB candidate user devices that the user equipment of business and other collaboration base stations are serviced；

According to the channel information of each down channel, for each down channel determine in the multiple orderly base under this The row channel degree of correlation meets interconnection vector of the vector of the first predetermined condition as the down channel, and will be where the interconnection vector Orderly base be determined as the orderly base of association of the down channel；

According to each interconnection vector of each down channel, the label of each down channel is generated, wherein the label is available In the instruction interconnection vector；

According to being respectively associated between orderly base for the label of each down channel and each down channel The degree of correlation selects user equipment to carry out CoMP CB in the user equipment that this cell is serviced；

Also, the method further includes：

The message that the instruction selected user equipment in this base station is sent to other collaboration base stations, wherein the message package includes The CoMP CB that this base station is serviced to the label of the down channel of the user equipment and this base station to other collaboration base stations are waited Select the label of the down channel of user equipment.

According to another aspect of the present invention, provide it is a kind of in the base station of LTE-A network for carry out collaboration multiple spot association The device of same beam forming (CoMP CB), wherein it includes multiple code books for answering the orderly bases of normal orthogonal that the LTE-A network, which uses, And it is Linear Rotation transformation relation between the multiple orderly base, described device includes：

Device for obtaining the channel information to each down channel of each user equipment, each user equipment include The CoMP CB candidate user devices that the user equipment and other collaboration base stations that this base station is serviced are serviced；

For according to the channel information of each down channel, for each down channel determine in the multiple orderly base with The down channel degree of correlation meets interconnection vector of the vector as the down channel of the first predetermined condition, and by the interconnection vector The orderly base at place is determined as the device of the orderly base of association of the down channel；

For each interconnection vector according to each down channel, the label of each down channel is generated, wherein the label It may be used to indicate the device of the interconnection vector；

For according to the orderly base of each association of the label of each down channel and each down channel it Between the degree of correlation, select user equipment to carry out the device of CoMP CB in the user equipment that this cell is serviced；

Also, described device further includes：

Device for the message for sending from the instruction selected user equipment in this base station to other collaboration base stations, wherein institute It includes that this base station is serviced to the label of the down channel of the user equipment and this base station to other collaboration base stations to state message The label of the down channel of CoMP CB candidate user devices.

Still another aspect according to the present invention provides a kind of base station including described device.

Compared with prior art, the present invention is based on the correlations between the interconnection vector of each down channel and each orderly base It spends to select user equipment to carry out CoMP CB, reduces inter-user interference, improve system performance.Also, the present invention is based on institute The interconnection vector of down channel corresponding to the downlink user equipment of selection generates prelisting for CoMP CB with orderly base is associated with Code matrix avoids complicated pre-coding matrix and calculates, improves system performance.

Description of the drawings

By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other Feature, objects and advantages will become more apparent upon：

Fig. 1 shows to carry out an exemplary topology of collaboration multi-point cooperative beam forming (CoMP CB) in LTE-A network Figure；

Fig. 2 shows the flow charts according to the method for carrying out CoMP CB of the embodiment of one aspect of the invention；

Fig. 3 show according to the embodiment of one aspect of the invention between cooperate with base station exchange information to select user Equipment carries out the flow chart of the method for CoMP CB.

Fig. 4 shows the schematic diagram of the device for carrying out CoMP CB of another aspect of the invention；

Same or analogous reference numeral represents same or analogous component in attached drawing.

Specific implementation mode

Present invention is further described in detail below in conjunction with the accompanying drawings.

Usually, including multiple base stations, cell is wireless where each base station provides it for LTE-A network as described herein Covering and multiple user equipmenies, each user equipment can in different community or between move.Wherein base station includes but not It is limited to NodeB, eNodeB.Each cell can dispose a base station, and each base station can include several sectors.It can be in base station Between using be used for transmission customer service or control business interface communicate.Base station can directly or indirectly be set with each user Standby communication.And each user equipment can be any type can wirelessly directly or indirectly and base station communication electronic equipment, Including but not limited to：Mobile phone, PDA etc..In addition, each base station in the LTE-A network has more as a preferred method, Antenna, each user equipment also have more antennas.It is double that the time-division may be used in each user equipment and base station in the LTE-A network Work pattern (time-division duplexing mode, TDD mode) or mode of frequency division duplexing (frequency- Division duplexing mode, FDD mode) it receives and sends messages.It should be appreciated by those skilled in the art that each user equipment and The pattern of base station transceiver information is not limited with above-mentioned, other wireless communication techniques and receipts existing or be likely to occur from now on The pattern of photos and sending messages is such as applicable to the present invention, should also be included within the scope of the present invention, and is contained in by reference This.

Fig. 1 shows to carry out an exemplary topology of collaboration multi-point cooperative beam forming (CoMP CB) in LTE-A network Figure.

As shown in Figure 1, in LTE-A network, for the user equipment in cell edge position, CoMP can be utilized CB technologies coordinate the user equipment that it is respectively serviced from the beam position that sends out of each collaboration base station, to reduce inter-user interference. It will be understood by those skilled in the art that CoMP CB can be not only carried out between adjacent base station, and can also between the sectors Nei Ge of base station CoMP CB are carried out, therefore the present invention is applicable not only to the CoMP CB between adjacent base station, is applied equally to the base station sectors Nei Ge Between CoMP CB.For simplicity, hereinafter, we will be described by taking the CoMP CB between base station as an example.

In addition, each base station of LTE-A network designed by the present invention and each user equipment use predetermined code book C={ C₁, C₂... C_l, the predetermined code book be include multiple multiple orderly bases of normal orthogonal, and be linearly to revolve between the multiple orderly base Turn the arbitrary code book of transformation relation.

Fig. 2 shows the flow charts according to the method for carrying out CoMP CB of the embodiment of one aspect of the invention.

In the step s 21, base station is obtained to the channel information of each down channel of each user equipment, and each user sets The CoMP CB candidate user devices that the standby user equipment serviced including this base station and other collaboration base stations are serviced.Herein, The CoMP CB candidate user devices that other described collaboration base stations are serviced refer to being serviced by other collaboration base stations, and be in The user equipment of the edge of other collaboration base station institute coverage cells.

In one embodiment, base station can be according to the channel information of each down channel and/or from each use The measurement result of family equipment determines CoMP CB candidate user devices, and sends the CoMP CB candidates to other collaboration base stations The information of user equipment.

Specifically, it is described by taking base station 1 as an example.For all user equipmenies that base station 1 is serviced, 1 basis of base station The measurement result that the channel information of down channel and each user equipment are reported, to determine whether each user equipment is located at cell Marginal position.If certain user equipment is located at cell edge position, then the user equipment can be used as the optional user of CoMP CB and set It is standby.For example, for the user equipment 1A that base station 1 is serviced, base station 1 controls user equipment 1A and carries out channel measurement.When user sets After standby 1A is measured according to measurement request, the measurement result that reporting channel is measured is to base station 1.When base station 1 requires user to set When the channel measurement that standby 1A is carried out is affair, user equipment 1A will carry out event evaluation according to event triggering criterion, work as thing When part triggering criterion meets, user equipment 1A sends measurement result to base station 1, wherein can include different measurement report things Part, such as A1, A2, A3, the events such as A4, A5.When base station 1 receives the measurement report event transmitted by user equipment 1A, such as A3 Event indicates that, for user equipment 1A, neighboring community's service quality confirms user equipment close to serving cell, then base station 1 1A is in cell edge position and can be as the candidate user devices of CoMP CB.With above-mentioned same method, base station 1 determines All CoMP CB candidate user devices in the user equipment of this base station service.It will be understood by those skilled in the art that this place is retouched The method of the candidate user devices of the determination CoMP CB stated is descriptive and non-limiting, there are other various realization sides Formula without departing from the spirit and scope of the invention, and is incorporated herein by reference.

Then, base station sends the information of above-mentioned CoMP CB candidate user devices to other collaboration base stations.For example, each collaboration Base station can establish multicast group, to which base station can send above-mentioned message to the Multicast group address.For another example, base station can also lead to It crosses point-to-point mode and sends above-mentioned message to others collaboration base station.It will be understood by those skilled in the art that hair described herein It is descriptive and non-limiting to send the mode of message, there is spirit of other various realization methods without departing from the present invention And range, and be incorporated herein by reference.

Correspondingly, base station can receive the CoMP CB candidate user devices of other collaboration base stations from other collaboration base stations Information.For example, base station can receive above-mentioned message from above-mentioned Multicast group address.For another example, base station can also be by point-to-point Mode receives above-mentioned message from others collaboration base station.It will be understood by those skilled in the art that reception message described herein Mode is descriptive and non-limiting, there are other various realization methods without departing from the spirit and scope of the invention, and It is incorporated herein by reference.

The CoMP CB candidate users that the user equipment serviced for this base station and other collaboration base stations are serviced are set Standby, base station will be obtained to the channel information of the down channel of each user equipment.For example, in TDD networks, uplink and downlink channel is utilized Reciprocity, base station can by obtain user equipment send detectable signal, estimate the user equipment to base station uplink The channel information of channel, and the channel information of the down channel as base station to user equipment.The channel information preferably can be with It is channel matrix.Since the technology that those skilled in the art obtain base station channel information has been known, therefore herein no longer in detail It states.Also, it will be understood by those skilled in the art that being merely illustrative and non-limiting retouching herein in regard to the description for obtaining channel information It states, there are various other realization methods without departing from the spirit or scope of the present invention, and is incorporated herein by reference.

Then in step S22, base station is described in each down channel determines according to the channel information of each down channel Meet interconnection vector of the vector of the first predetermined condition as the down channel in multiple orderly bases with the down channel degree of correlation, And the orderly base where the interconnection vector is determined as to the orderly base of association of the down channel.

Above-mentioned first predetermined condition can be ordered into vector and the down channel degree of correlation highest in base.Also, one In a preferred embodiment, the code book is denoted as C={ C₁, C₂... C_N, C_i∈C^[T*T]Just for i-th of multiple standard in code book C It is the antenna number of base station, C to hand over orderly base, T_{I, k}For orderly base C_iIn k-th of base vector,To believe to the downlink of user j The channel matrix in road,M to carry out the left feature matrix after singular value decomposition to the channel matrix is arranged, and is pair The feature vector of the corresponding down channel of m-th of characteristic value of the Ying Yuzhi user j, according under following formula (1) determination and this The row channel degree of correlation meets the vectorial C of the first predetermined condition_{I, k}Interconnection vector as the down channel：

Wherein, Re () indicates to take the real part of the multiplication of complex numbers.

Also, base station is by C_{I, k}The orderly base C at place_iIt is determined as the orderly base of association of the down channel.

Then, in step S23, base station generates each down channel according to each interconnection vector of each down channel Label, wherein the label may be used to indicate the interconnection vector.

For example it is assumed that C_{I, k}It, then can be by C for the interconnection vector of the down channel_{I, k}The rope of the corresponding orderly base of association The row number k of quotation marks i and the interconnection vector in the orderly base of the association is added in label, to can be with according to the label generated Know the interconnection vector.Further, it is also possible to classify to down channel according to by the relevance degree calculated above, and will The classification information is also added in label.For example, the threshold value of the degree of correlation can be set according to such as empirical value or historical statistics value, and Classified according to threshold value.When the degree of correlation between down channel and interconnection vector is higher than the threshold value, it is meant that the downlink is believed There is smaller interference between road and other directions, " high-quality " can be added in its label；And when the degree of correlation is not higher than the threshold value When, " non-prime " can be added in its label.It will be understood by those skilled in the art that herein, generating the label of instruction interconnection vector Process and the description of the label information that includes be merely illustrative and non-limiting description, there are various other realization methods Without departing from the spirit or scope of the present invention, and it is incorporated herein by reference.

Then, in step s 24, the label and each down channel of the base station according to each down channel The degree of correlation being respectively associated between orderly base, select user equipment to carry out CoMP CB in the user equipment that this cell is serviced.

Herein, base station can determine the correlation of each down channel being respectively associated between orderly base as follows Degree：The code book is denoted as C={ C₁, C₂... C_N, C_i, C_j∈ C are i-th and j-th orderly base in code book C, C_{I, 1}For Orderly base C_iIn the 1st base vector, C_{J, 1}For orderly base C_j, in the 1st base vector, calculated according to following formula (2) orderly Base C_i, C_j, between degree of correlation γ (C_{I, 1}, C_{J, 1})：

In addition, in one embodiment, multiple orderly bases in code book can also be arranged in by correlation size in advance One circle cyclic sequence, it is ensured that have larger correlation between adjacent orderly base, correlation is minimum between the orderly base of spaced furthest.This Place, can determine the circle cyclic sequence of orderly base according to (3) as follows：

Wherein, P={ N！, it is N number of orderly possible all arrangements of base }.

And it is possible to by two sorted by circle cyclic sequence orderly base C_iAnd C_jBetween distance L (C_i, C_j), i ≠ j is fixed Justice is such as following formula (4)：

Wherein, [i] is mould N operations, and [i]-[j] is mould N subtractions.

To in the degree of correlation between calculating two orderly bases, can directly be obtained according to the distance between two orderly bases. Apart from smaller, for example, 1, then the degree of correlation is higher.Distance is bigger, and for example, N/2, then the degree of correlation is smaller.

It will be understood by those skilled in the art that herein, the description about the degree of correlation between the orderly base of determination is merely illustrative And non-limiting description, there are various other realization methods without departing from the spirit or scope of the present invention, and with the side of reference Formula is incorporated herein.

Then, base station is orderly according to each association of the label and each down channel of each down channel The degree of correlation between base selects user equipment to carry out CoMP CB in the user equipment that this cell is serviced.

In one embodiment, respectively collaboration base station can degrees of coordination priority in advance, such as each collaboration base station can arrange Highest scheduling priority is obtained in turn.In another embodiment, collaboration base station can send it to other collaboration base stations and be used for The scheduling priority information of next time slot, and receive the scheduling that other collaboration base stations are used for next time slot from other collaboration base stations Precedence information.To by cooperateing with the information exchange between base station, each collaboration base station that can determine respective for next time slot Scheduling priority information.

In one embodiment, the collaboration base station with highest priority in this scheduling, can be serviced from it CoMP CB candidate user devices, namely the user equipment in its cell edge position are selected in user equipment.And other are cooperateed with Non- CoMP CB candidate user devices are selected in the user equipment that base station can respectively be serviced from it, namely in its cell Between position user equipment, with reduce high priority cooperate with the selected user equipment in base station caused by interfere.

In another embodiment, each collaboration base station can select user equipment according to respective dispatching criterion.Example Such as, base station can be according to equitable proportion or maximum throughput criterion, to be selected from the user equipment that this base station is serviced. For another example, as described above, until can be associated with comprising the down channel in the label of each down channel of each user equipment to Degree of correlation information between amount, base station can select the degree of correlation being associated between vector higher accordingly namely channel quality compared with User equipment corresponding to good down channel.Further, it is also possible to be combined the degree of correlation from this base with other selection criterions It is selected in the user equipment for the service of standing.In a preferred embodiment, base station can also classify user equipment, example Such as it is divided into CoMP CB candidate user devices classes and non-CoMP CB candidate user devices classes, and to the certain weight of all kinds of impartings, And it is scheduled according to the height of weighted value.For example, it is contemplated that better throughput of system is arrived, it can be by non-CoMP CB candidates User equipment, namely the weight of the user equipment in center of housing estate position are adjusted to 1.2, and by non-CoMP CB candidate users The weighted value of equipment is adjusted to 0.5.Next, for every a kind of user equipment, it can be by the weight of such user equipment and such User equipment sum is multiplied and obtains its total weight, and selects user equipment from the maximum a kind of user equipment of total weight. In one preferred embodiment, base station can be combined with the dispatching priority of this scheduling to adjust CoMP CB candidate user devices Weight.For example, when the dispatching priority of this scheduling is higher, the corresponding weight that CoMP CB candidate user devices are turned up, from And alloing, there is the base station compared with scheduling priority to increase the chance for dispatching CoMP CB candidate user devices；Correspondingly, when When the dispatching priority of this scheduling is relatively low, the weight of CoMP CB candidate user devices is accordingly turned down, to have relatively low scheduling The base station of priority can avoid scheduling CoMP CB candidate user devices to reduce to the base station with higher priority very as possible It may be by the interference of the CoMP CB candidate user devices of scheduling.

After having selected user equipment, each base station can also send to other collaboration base stations and indicate that this base station is selected The message of user equipment, and receive disappearing for instruction other collaboration selected user equipmenies in base station from other collaboration base stations Breath.To which each base station is able to know the selected user equipment in each collaboration base station.

It will be understood by those skilled in the art that the method for selection user equipment described herein is descriptive and non-limiting , there are other various realization methods without departing from the spirit and scope of the invention, and be incorporated herein by reference.

In a preferred embodiment, message can be exchanged between collaboration base station to coordinate the process of selection user equipment.Fig. 3 Show according to the embodiment of one aspect of the invention between cooperate with base station exchange information to select user equipment to carry out The flow chart of the method for CoMP CB.For simplicity, below we with two collaboration base stations, come for base station 1 and base station 2 into Row explanation, and, it is assumed that the CoMP CB user equipment that base station 1 is serviced includes user equipment 1A and user equipment 1B, and its The non-CoMP CB users equipment serviced includes user equipment 1C and user equipment 1D；The CoMP CB users that base station 2 is serviced Equipment includes user equipment 2A and user equipment 2B, and its non-CoMP CB users equipment serviced includes user equipment 2C And user equipment 2D.Furthermore, it is assumed that in this this scheduling, base station 1 has higher dispatching priority.

In step S31, base station sends the message of the instruction selected user equipment in this base station to other collaboration base stations, Described in message to include this base station taken to the label of the down channel of the user equipment and this base station to other collaboration base stations The label of the down channel of the CoMP CB candidate user devices of business.For example, as described above, respectively collaboration base station can establish multicast Group, to which base station can send above-mentioned message to the Multicast group address.For another example, base station can also by point-to-point mode to its The base station of his collaboration multi-point joint transmission sends above-mentioned message.In a preferred embodiment, base station can only be dispatched to it Priority sends above-mentioned message less than other collaboration base stations of the dispatching priority of this base station.It will be understood by those skilled in the art that The mode of transmission message described herein is descriptive and non-limiting, exist other various realization methods without departing from The spirit and scope of the present invention, and be incorporated herein by reference.

In a preferred embodiment, to the message for indicating its selected user equipment transmitted by other collaboration base stations In further include this base station be used for next time slot scheduling priority information.

In this example, the higher base station 1 of dispatching priority sends to base station 2 and indicates its selected user equipment, it is assumed that For CoMP CB candidate user devices 1A, message.Wherein described message package includes base station 1 to the down channel of user equipment 1A CoMP CB candidate user devices that label and base station 1 are serviced to base station 2 namely user equipment 2A's and user equipment 2B The label of down channel.As described above, the label of down channel may be used to indicate the interconnection vector of the down channel, wherein I WithTo refer to the label from base station j to user equipment i.Then in this example, the base station 1 is to disappearing transmitted by base station 2 Breath is { selected user equipment, or be { selected user equipment Next timeslot scheduling priority=5 }.

In step s 32, base station is received from other collaboration base stations indicates other collaboration selected user equipmenies in base station Message, wherein the message package includes this other collaboration base stations to the label of the down channel of the user equipment and this its The downlink that he cooperates with base station to the CoMP CB candidate user devices serviced from other collaboration base stations for cooperateing with base stations different is believed The label in road.For example, base station can receive above-mentioned message by Multicast group address described above.For another example, base station can also By point-to-point mode above-mentioned message is received from the base station of other collaboration multi-point joint transmissions.Those skilled in the art should manage Solution, the mode of receptions message described herein is descriptive and non-limiting, exist the various realization methods of others without Away from the spirit and scope of the present invention, and it is incorporated herein by reference.

In a preferred embodiment, the instruction received from other collaboration base stations other collaboration selected use in base station It further include the scheduling priority information that other described collaboration base stations are used for next time slot in the message of family equipment.

In this example, the message that base station 2 is received from base station 1 is { selected user equipment , or be { selected user equipmentNext timeslot scheduling priority=5 }.

Then, in step S33, when base station receives other collaboration base stations from dispatching priority higher than this base station , after the message for indicating this other collaboration selected user equipmenies in base station, base station according to the label of each down channel with And the degree of correlation of each down channel being respectively associated between orderly base, and should according to the instruction received from other collaboration base stations The message of other collaboration selected user equipmenies in base station selects to meet following condition in the user equipment that this cell is serviced User equipment carry out CoMP CB：

When selected user equipment is non-CoMP CB candidate user devices, this base station to its own selected use The down channel of family equipment cooperates with the selected CoMP CB in base station with this base station to dispatching priority higher than other of this base station Meet the second predetermined condition between the down channel of candidate user devices；

When selected user equipment is CoMP CB candidate user devices, this base station to its own selected use The down channel of family equipment cooperates with the selected CoMP CB in base station with this base station to dispatching priority higher than other of this base station Meet the second predetermined condition between the down channel of candidate user devices, also, dispatching priority is higher than other collaborations of this base station Base station is higher than its of this base station to the down channel of the selected CoMP CB candidate user devices in this base station with dispatching priority He cooperates with base station to meet the second predetermined condition between the down channel of its own selected CoMP CB candidate user devices；

Wherein, the second predetermined condition is met between the down channel includes：

The degree of correlation between the orderly base of association of each down channel meets third predetermined condition, and the association of each down channel to It is different to measure residing second time target serial number in its orderly base.

Specifically, herein, third predetermined condition can be the relevance degree height between the orderly base of association of each down channel In predetermined threshold.Also, the predetermined threshold can dynamically be adjusted according to system needs.

Example is connected, as described above, the message that base station 2 is received from base station 1 is { selected user equipment , it is CoMP CB candidate user devices to which base station 2 knows that the higher base station of dispatching priority 1 has selected user equipment 1A.

Then, it is non-CoMP CB candidate user devices in this example, it is assumed that base station 2 wishes to select user equipment 2C. To which base station 2 is it needs to be determined that the down channel of user equipment 2C is arrived in base station 2, and (it is excellent to dispatch with base station 2 to user equipment 1A The first higher 1 selected CoMP CB users equipment of base station of grade) down channel between meet the second predetermined condition.That is, base station 2 judge whether the degree of correlation between the orderly base of association of two down channels is higher than predetermined threshold, and two downlink letters Whether the respective interconnection vector in road second time target serial number residing in its orderly base be different, so that it is determined that wishing to select User equipment 2C it is whether eligible.

Or in this example, it is assumed that base station 2 wishes to select user equipment 2A, for CoMP CB candidate user devices. To which base station 2 is removed it needs to be determined that base station 2 arrives the down channel of user equipment 1A with base station 2 to the down channel of user equipment 2A Between meet except the second predetermined condition, it is also necessary to determine base station 1 arrive user equipment 2A down channel, set to user with base station 1 Meet the second predetermined condition between the down channel of standby 1A.Instruction its selected user received from base station 1 by base station 2 is set It include the label of above-mentioned down channel in standby messageAndAs described above, according to label, base station 2 It can learn two respective interconnection vectors of down channel, and thereby obtain its respective orderly base of association, then base station is sentenced Whether the degree of correlation between the orderly base of association of disconnected two down channels is higher than predetermined threshold, and two down channels are each From interconnection vector it is residing in its orderly base second time target serial number it is whether different, so that it is determined that wishing the use of selection Whether family equipment 2A is eligible.

When base station determines that its desired user equipment selected meets above-mentioned condition, base station, which determines, selects the user equipment Carry out CoMP CB.When base station determines that its desired user equipment selected is unsatisfactory for above-mentioned condition, in one embodiment, Base station can re-start selection, or in another embodiment, and base station can abandon this dispatcher meeting.

In one embodiment, when the dispatching priority of base station is not highest or is secondary high, base station will be only in non-CoMP CB Selector closes the user equipment of above-mentioned condition in user equipment.

Then, in step S34, base station sends disappearing for the instruction selected user equipment in this base station to other collaboration base stations Breath, wherein the message package includes this base station cooperates with base to the label of the down channel of the user equipment and this base station to other The label of the down channel for the CoMP CB candidate user devices for standing serviced.As described above, base station can be to other each collaborations Base station sends the message, only can also send the message to the lower base station of priority.In this example, it is assumed that selected by base station 2 User equipment be 2C.Base station 2 can send the message for indicating selected user equipment 2C to base station 1, be { selected user Equipment}。

Then, in step s 35, base station in above-described manner, instruction this other is received from other collaboration base stations The message of the selected user equipment in base station is cooperateed with, wherein the message package includes other collaboration base stations to the user equipment The CoMP that the label of down channel and other collaboration base stations are serviced to the collaboration base station different from other collaboration base stations The label of the down channel of CB candidate user devices.In this example, base station 1 receives instruction 2 selected use of base station from base station 2 Message { the selected user equipment of family equipment 2C}。

In one embodiment, base station according to the selected user equipment in this base station and to dispatching priority higher than this Down channel { the L of other collaboration selected CoMP CB candidate user devices in base station of base station₁, L₂... L_n, wherein L₁For To the down channel of the selected CoMP CB candidate user devices in the highest base station of dispatching priority, and wherein { L₁, L₂, ...L_nEach down channel Li interconnection vectorFor orderly baseK_iRow are generated for CoMP CB's Pre-coding matrix, wherein the pre-coding matrix byComposition, whereinForK_iRow, wherein i=1 to n.

For example it is assumed that other collaborations to the selected user equipment in this base station and to dispatching priority higher than this base station The down channel of the selected CoMP CB candidate user devices in base station is { L₁, L₂, L₃, L₄, interconnection vector is { C_5,1, C_5,2, C_2,3, C_4,5, wherein the down channel to the selected CoMP CB candidate user devices in the highest base station of dispatching priority is L₁ (hereinafter referred to as the first down channel), interconnection vector C_5,1, it is C to be associated with orderly base₅.Then pre-coding matrix will serve as reasons Column vector C_5,1, C_5,2, C_5,3, C_5,5The matrix of composition, wherein using C_5,3, C_5,5Approximation replaces C_2,3, C_4,5.Due to as described above, each It is Linear Rotation transformation relation between orderly base, and the orderly base of association of selected each down channelWith the first downlink The orderly base of association of channelThe degree of correlation meet third predetermined condition, can be the degree of correlation be higher than certain threshold value, then WithCarry out approximate replacement C_{Vi, Ki}Energy loss caused by forming pre-coding matrix is smaller.And due to C_{Vi, Ki}It can be byApproximate substitution, due to as previously mentioned, selected each down channel interconnection vector C_{Vi, Ki}In respective orderly base The serial number of the second residing subscript Ki is different, that is, can useIn there are different second time target vector to distinguish Each C of approximate substitution_{Vi, Ki}.Due to as previously mentioned, orderly base in code book is the orderly base of multiple normal orthogonal, namelyIn have Second time target vector C of difference_{V1, Ki}It is orthogonal, that is, each interconnection vector C of its approximated replacement_{Vi, Ki}Each other it is approximate just It hands over, therefore when carrying out downlink transfer, interference to each other is smaller.In aforementioned manners, can be believed according to selected downlink The interconnection vector in road quickly generates pre-coding matrix for CoMP CB with orderly base is associated with, and prelists so as to avoid complicated Code matrix calculates, and improves system performance.

Fig. 4 shows the schematic diagram of the device for carrying out CoMP CB of the embodiment according to one aspect of the invention.

(hereinafter referred to as channel information is obtained device 41 for obtaining to the channel information of each down channel of each user equipment Take device 41) it obtains to the channel information of each down channel of each user equipment, each user equipment includes that this base station is taken The CoMP CB candidate user devices that the user equipment of business and other collaboration base stations are serviced.Herein, other described collaboration base stations The CoMP CB candidate user devices serviced refer to being serviced by other collaboration base stations, and other cooperate with base station institutes in this The user equipment of the edge of coverage cell.

In one embodiment, for according to each down channel channel information and/or set from each user Standby measurement result determines that the device 45 of CoMP CB candidate user devices (is not shown, hereinafter referred to as CoMP CB candidate users Equipment determining device 45) it can be according to the channel information of each down channel and/or the measurement from each user equipment As a result, determine CoMP CB candidate user devices, and its, it is set for sending the CoMP CB candidate users to other collaboration base stations The device 46 (being not shown, hereinafter referred to as CoMP CB candidate user devices information transmitting apparatus 46) of standby information is assisted to other The information of the CoMP CB candidate user devices is sent with base station.

Specifically, it is described by taking base station 1 as an example.For all user equipmenies that base station 1 is serviced, CoMP CB are waited The measurement result for selecting user equipment determining device 45 to be reported according to the channel information and each user equipment of down channel is come true Whether fixed each user equipment is located at cell edge position.If certain user equipment is located at cell edge position, then CoMP CB candidates use Family equipment determining device 45 determines that the user equipment can be used as the optional user equipment of CoMP CB.For example, being taken for base station 1 The user equipment 1A of business, base station 1 control user equipment 1A and carry out channel measurement.When user equipment 1A is surveyed according to measurement request After amount, the measurement result that reporting channel is measured is to base station 1.When the CoMP CB candidate user devices determining device 45 of base station 1 is wanted Ask user equipment 1A carry out channel measurement be affair when, user equipment 1A will according to event triggering criterion carry out event comment Estimate, when event triggering criterion meets, user equipment 1A sends measurement result to base station 1, wherein can include different measurements Report event, such as A1, A2, A3, the events such as A4, A5.When the CoMP CB candidate user devices determining device 45 of base station 1 receives It is indicated to the measurement report event transmitted by user equipment 1A for user equipment 1A, neighboring community's Service Quality such as A3 events Amount confirms that user equipment 1A is in cell close to serving cell, then the CoMP CB candidate user devices determining device 45 of base station 1 Marginal position simultaneously can be as the candidate user devices of CoMP CB.It is used with the CoMP CB candidates of above-mentioned same method, base station 1 Family equipment determining device 45 determines all CoMP CB candidate user devices in the user equipment of this base station service.This field skill The method that art personnel should be understood that the candidate user devices of determining CoMP CB described herein be it is descriptive and non-limiting, Without departing from the spirit and scope of the invention in the presence of other various realization methods, it and is incorporated herein by reference.

Then, CoMP CB candidate user devices information transmitting apparatus 46 sends above-mentioned CoMP CB to other collaboration base stations The information of candidate user devices.For example, respectively collaboration base station can establish multicast group, to CoMP CB candidate user devices information Sending device 46 can send above-mentioned message to the Multicast group address.For another example, CoMP CB candidate user devices information sends dress Above-mentioned message can also be sent by point-to-point mode to others collaboration base station by setting 46.It will be understood by those skilled in the art that this The mode for the transmission message that place illustrates is descriptive and non-limiting, there are other various realization methods without departing from this The spirit and scope of invention, and be incorporated herein by reference.

Correspondingly, the letter of the CoMP CB candidate user devices for receiving other collaboration base stations from other collaboration base stations The device 47 (being not shown, hereinafter referred to as CoMP CB candidate user devices information receiver 47) of breath can be from other collaborations Base station receives the information of the CoMP CB candidate user devices of other collaboration base stations.For example, CoMP CB candidate user devices are believed Breath reception device 47 can receive above-mentioned message from above-mentioned Multicast group address.For another example, CoMP CB candidate user devices information connects Receiving apparatus 47 can also receive above-mentioned message by point-to-point mode from others collaboration base station.Those skilled in the art should manage Solution, the mode of receptions message described herein is descriptive and non-limiting, exist the various realization methods of others without Away from the spirit and scope of the present invention, and it is incorporated herein by reference.

The CoMP CB candidate users that the user equipment serviced for this base station and other collaboration base stations are serviced are set Standby, channel information acquisition device 41 will be obtained to the channel information of the down channel of each user equipment.For example, in TDD networks, Using the reciprocity of uplink and downlink channel, the detectable signal that channel information acquisition device 41 can be sent by obtaining user equipment, The user equipment is estimated to the channel information of the up channel of base station, and the letter of the down channel as base station to user equipment Road information.The channel information preferably can be channel matrix.Since those skilled in the art obtain channel information for base station Technology known that therefore this will not be detailed here.Also, it will be understood by those skilled in the art that herein in regard to channel information is obtained Description be merely illustrative and non-limiting description, there are various other realization methods without departing from the present invention spirit or model Farmland, and be incorporated herein by reference.

It is then used to the channel information according to each down channel, is determined in the multiple orderly base for each down channel Meet interconnection vector of the vector as the down channel of the first predetermined condition with the down channel degree of correlation, and by the association to Orderly base where amount is determined as device 42 (being hereinafter referred to as associated with determining device 42) root of the orderly base of association of the down channel According to the channel information of each down channel, for each down channel determine in the multiple orderly base with the down channel degree of correlation Meet interconnection vector of the vector as the down channel of the first predetermined condition, and the orderly base where the interconnection vector is determined For the orderly base of association of the down channel.

Above-mentioned first predetermined condition can be ordered into vector and the down channel degree of correlation highest in base.Also, one In a preferred embodiment, the code book is denoted as C={ C₁, C₂... C_N, C_i∈C^[T*T]Just for i-th of multiple standard in code book C It is the antenna number of base station, C to hand over orderly base, T_{I, k}For orderly base C_iIn k-th of base vector,For to the down channel of user j Channel matrix,M to carry out the left feature matrix after singular value decomposition to the channel matrix is arranged, to correspond to In the feature vector of the corresponding down channel of m-th of characteristic value to the user j, association determining device 42 is according to following formula (1) the vectorial C for meeting the first predetermined condition with the down channel degree of correlation is determined_{I, k}Interconnection vector as the down channel：

Also, determining device 42 is associated with by C_{I, k}The orderly base C at place_iIt is determined as the orderly base of association of the down channel.

Then, it is used for each interconnection vector according to each down channel, generates the label of each down channel, wherein described Label may be used to indicate the device 43 (hereinafter referred to as label generating means 43) of the interconnection vector according to each of each down channel Interconnection vector generates the label of each down channel, wherein the label may be used to indicate the interconnection vector.

For example it is assumed that C_{I, k}For the interconnection vector of the down channel, then label generating means 43 can be by C_{I, k}Corresponding It is associated with the row number k of the call number i and the interconnection vector of orderly base in the orderly base of the association to be added in label, to according to institute The label of generation can know the interconnection vector.In addition, label generating means 43 can also be according to by the correlation calculated above The classification information is also added in label to classify to down channel for angle value.For example, label generating means 43 can root The threshold value of the degree of correlation is set according to such as empirical value or historical statistics value, and is classified according to threshold value.When down channel and pass When the degree of correlation between connection vector is higher than the threshold value, it is meant that there is smaller interference, mark between the down channel and other directions " high-quality " can be added in its label in label generating means 43；And when the degree of correlation is not higher than the threshold value, label generating means 43 can " non-prime " is added in its label.It will be understood by those skilled in the art that herein, generating the process of the label of instruction interconnection vector And the description of the label information that includes is merely illustrative and non-limiting description, there are various other realization methods without carrying on the back Spirit or scope from the present invention, and be incorporated herein by reference.

Then, it is used for orderly according to each association of the label and each down channel of each down channel The degree of correlation between base selects the device 44 that user equipment carries out CoMP CB (following in the user equipment that this cell is serviced Abbreviation user equipment selection device 44) according to the label of each down channel and each pass of each down channel The degree of correlation being associated between sequence base selects user equipment to carry out CoMP CB in the user equipment that this cell is serviced.

Herein, user equipment selection device 44 can determine that each association of each down channel is orderly as follows The degree of correlation between base：The code book is denoted as C={ C₁, C₂... C_N, C_i, C_j∈ C, which are i-th and j-th in code book C, to be had Sequence base, C_{I, 1}For orderly base C_iIn the 1st base vector, C_{J, 1}For orderly base C_jIn the 1st base vector, according to following formula (2) Calculate orderly base C_i, C_jBetween degree of correlation γ (C_{I, 1}, C_{J, 1})：

In addition, in one embodiment, user equipment selection device 44 can also be in advance by multiple orderly bases in code book It is arranged in a circle cyclic sequence by correlation size, it is ensured that there is larger correlation, spaced furthest to have between adjacent orderly base Correlation is minimum between sequence base.Herein, user equipment selection device 44 can determine the circle of orderly base according to (3) as follows Enclose cyclic sequence：

Also, user equipment selection device 44 can be by two sorted by circle cyclic sequence orderly base C_iAnd C_jBetween Distance L (C_i, C_j), i ≠ j is defined as such as following formula (4)：

Wherein, [i] is mould N operations, and [i]-[j] is mould N subtractions.

To which in the degree of correlation between calculating two orderly bases, user equipment selection device 44 can be directly according to two Distance between orderly base obtains.Apart from smaller, for example, 1, then the degree of correlation is higher.Bigger, for example, N/2 of distance, the then degree of correlation It is smaller.

Then, user equipment selection device 44 is believed according to the label and each downlink of each down channel The degree of correlation being respectively associated between orderly base in road selects user equipment to carry out CoMP in the user equipment that this cell is serviced CB。

In one embodiment, respectively the user equipment selection device 44 of collaboration base station can coordinated scheduling priority in advance, Such as the user equipment selection device 44 of each collaboration base station can arrange to obtain highest scheduling priority in turn.In another implementation In example, collaboration base station can send it to other collaboration base stations and be used for the scheduling priority information of next time slot, and be assisted from other The scheduling priority information that other collaboration base stations are used for next time slot is received with base station.To by cooperateing with the letter between base station Breath exchanges, each to cooperate with the user equipment selection device 44 of base station that determine that the respective dispatching priority for next time slot is believed Breath.

In one embodiment, the user equipment selection device for cooperateing with base station with highest priority in this scheduling 44, CoMP CB candidate user devices are selected in the user equipment that can be serviced from it, namely in its cell edge position User equipment.And it is selected in the user equipment that the user equipment selection device 44 of other collaboration base stations can respectively be serviced from it Non- CoMP CB candidate user devices, namely the user equipment in its cell centre position cooperate with base to reduce to high priority It stands and interferes caused by selected user equipment.

In another embodiment, the user equipment selection device 44 of each collaboration base station can be according to respective scheduling standard Then select user equipment.For example, user equipment selection device 44 can according to equitable proportion or maximum throughput criterion, from It is selected in the user equipment that this base station is serviced.For another example, as described above, until the mark of each down channel of each user equipment It can be associated with the degree of correlation information between vector comprising the down channel in label, user equipment selection device 44 can come accordingly Select the degree of correlation that is associated between vector higher namely the preferable down channel of channel quality corresponding to user equipment.This Outside, user equipment selection device 44 can also set the degree of correlation with the user that other selection criterions are combined to be serviced from this base station It is selected in standby.In a preferred embodiment, user equipment selection device 44 can also classify user equipment, Such as it is divided into CoMP CB candidate user devices classes and non-CoMP CB candidate user devices classes, and to the certain power of all kinds of impartings Weight, and be scheduled according to the height of weighted value.For example, it is contemplated that arriving better throughput of system, user equipment selection device Non- CoMP CB candidate user devices, namely the weight of the user equipment in center of housing estate position can be adjusted to 1.2 by 44, And the weighted value of non-CoMP CB candidate user devices is adjusted to 0.5.Next, for every a kind of user equipment, user equipment The weight of such user equipment can be multiplied with such user equipment sum and obtain its total weight by selection device 44, and be weighed from total User equipment is selected in the maximum a kind of user equipment of weight.In a preferred embodiment, user equipment selection device 44 may be used also The weight of CoMP CB candidate user devices is adjusted with the dispatching priority dispatched in conjunction with this.For example, when the tune of this scheduling When degree priority is higher, the weight of CoMP CB candidate user devices is accordingly turned up in user equipment selection device 44, so that tool There is the base station compared with scheduling priority that can increase the chance of scheduling CoMP CB candidate user devices；Correspondingly, when this is dispatched Dispatching priority it is relatively low when, user equipment selection device 44 accordingly turns down the weight of CoMP CB candidate user devices, to have There is the base station of relatively low dispatching priority that can avoid scheduling CoMP CB candidate user devices to reduce to higher prior as possible The base station of grade is likely to the interference for the CoMP CB candidate user devices that will be dispatched.

After having selected user equipment, each base station indicates that this base station is selected for being sent to other collaboration base stations The device 48 (being not shown, hereinafter referred to as user equipment selection instruction message sending device 48) of the message of user equipment can be with The message of the instruction selected user equipment in this base station is sent to other collaboration base stations, also, for being connect from other collaboration base stations It receives and indicates that the device 49 of the message of other collaboration selected user equipmenies in base station (is not shown, hereinafter referred to as user equipment Selection instruction message reception device 49) it receives the instruction from other collaboration base stations other collaboration selected users in base station and sets Standby message.To which each base station is able to know the selected user equipment in each collaboration base station.

In a preferred embodiment, message can be exchanged between collaboration base station to coordinate the process of selection user equipment.For For the sake of simplicity, we are illustrated with two collaboration base stations for base station 1 and base station 2 below, and, it is assumed that 1 institute of base station The CoMP CB user equipment of service includes user equipment 1A and user equipment 1B, and its non-CoMP CB user serviced is set Standby includes user equipment 1C and user equipment 1D；The CoMP CB user equipment that base station 2 is serviced includes user equipment 2A and user Equipment 2B, and its non-CoMP CB users equipment serviced includes user equipment 2C and user equipment 2D.Furthermore, it is assumed that In this this scheduling, base station 1 has higher dispatching priority.

First, user equipment selection instruction message sending device 48 sends to other collaboration base stations and indicates selected by this base station User equipment message, wherein the message package includes this base station to the label and this base of the down channel of the user equipment The label of the down channel for the CoMP CB candidate user devices serviced to other collaboration base stations of standing.For example, as described above, each Collaboration base station can establish multicast group, to which user equipment selection instruction message sending device 48 can come to the Multicast group address Send above-mentioned message.For another example, user equipment selection instruction message sending device 48 can also be by point-to-point mode to others The base station of multi-point joint transmission is cooperateed with to send above-mentioned message.In a preferred embodiment, user equipment selection instruction message hair Other the above-mentioned message of collaboration base stations transmission for sending device 48 that can only be less than the dispatching priority of this base station to its dispatching priority. It will be understood by those skilled in the art that the mode of transmission message described herein is descriptive and non-limiting, there are other Various realization methods without departing from the spirit and scope of the invention, and be incorporated herein by reference.

In a preferred embodiment, user equipment selection instruction message sending device 48 is to transmitted by other collaboration base stations Instruction its selected user equipment message in further include scheduling priority information that this base station is used for next time slot.

In this example, the user equipment selection instruction message sending device 48 of the higher base station of dispatching priority 1 is to base station 2 Send indicate its selected user equipment, it is assumed that be CoMP CB candidate user devices 1A, message.The wherein described message package Base station 1 is included to set to the CoMP CB candidate users that base station 2 is serviced to the label of the down channel of user equipment 1A and base station 1 The label of standby namely user equipment 2A and user equipment 2B down channel.As described above, the label of down channel can be used for Indicate the interconnection vector of the down channel, wherein we withTo refer to the label from base station j to user equipment i.Then exist In this example, the user equipment of the base station 1 select instruction message sending device 48 to the message transmitted by base station 2 be { selected user Equipment, or be { selected user equipmentNext timeslot scheduling is excellent First grade=5 }.

Then, user equipment selection instruction message reception device 49 is received from other collaboration base stations indicates other collaboration bases It stands the message of selected user equipment, wherein downlinks that the message package includes other collaboration base stations to the user equipment are believed The label in road and other collaboration base stations are waited to the CoMP CB that the collaboration base station different from other collaboration base stations is serviced Select the label of the down channel of user equipment.For example, user equipment selection instruction message reception device 49 can pass through institute above The Multicast group address stated receives above-mentioned message.For another example, user equipment selection instruction message reception device 49 can also pass through a little The base station of multi-point joint transmission is cooperateed with to receive above-mentioned message from others point mode.It will be understood by those skilled in the art that herein The mode of illustrated reception message is descriptive and non-limiting, there are other various realization methods without departing from this hair Bright spirit and scope, and be incorporated herein by reference.

In a preferred embodiment, user equipment selection instruction message reception device 49 is received from other collaboration base stations Instruction this other collaboration selected user equipmenies in base station message in further include that other described collaboration base stations are used for lower a period of time The scheduling priority information of gap.

In this example, the user equipment of base station 2 select the message that instruction message reception device 49 is received from base station 1 for { selected user equipment, or be { selected user equipmentIt is next Timeslot scheduling priority=5 }.

Then, when user equipment selection instruction message reception device 49 is received from dispatching priority higher than this base station Other collaboration base stations, after the message for indicating other collaboration selected user equipmenies in base station, user equipment selection device 44 According to the degree of correlation of the label of each down channel and each down channel being respectively associated between orderly base, and according to from The message for indicating other collaboration selected user equipmenies in base station that other collaboration base stations are received, is serviced in this cell Selection meets the user equipment progress CoMP CB of following condition in user equipment：

Example is connected, as described above, what the user equipment selection instruction message reception device 49 of base station 2 was received from base station 1 Message is { selected user equipment, to which base station 2 knows that the higher base station 1 of dispatching priority is selected User equipment 1A has been selected, has been CoMP CB candidate user devices.

Then, it is non-in this example, it is assumed that the user equipment selection device 44 of base station 2 wishes to select user equipment 2C CoMP CB candidate user devices.To which the user equipment selection device 44 of base station 2 is it needs to be determined that user equipment 2C's arrived in base station 2 Down channel, (it sets for the higher 1 selected CoMP CB users of base station of dispatching priority with base station 2 to user equipment 1A It is standby) down channel between meet the second predetermined condition.That is, the user equipment selection device 44 of base station 2 judges two downlinks Whether the degree of correlation between the orderly base of association of channel is higher than predetermined threshold, and two respective interconnection vectors of down channel Whether second time residing target serial number different in its orderly base, so that it is determined that wish selection user equipment 2C whether It is eligible.

Or in this example, it is assumed that base station 2 user equipment selection device 44 wish select user equipment 2A, be CoMP CB candidate user devices.To which the user equipment selection device 44 of base station 2 removes it needs to be determined that user equipment 2A is arrived in base station 2 Down channel, meet except the second predetermined condition between the down channel of base station 2 to user equipment 1A, it is also necessary to determine base station 1 arrives the down channel of user equipment 2A, meets the second predetermined condition between the down channel of base station 1 to user equipment 1A.Due to What the user equipment selection instruction message reception device 49 of base station 2 was received from base station 1 indicates its selected user equipment It include the label of above-mentioned down channel in messageAndAs described above, according to label, the user of base station 2 Equipment selection device 44 can learn two respective interconnection vectors of down channel, and thereby it is orderly to obtain its respective association Base, then the user equipment selection device 44 of base station whether judge the degree of correlation between the orderly bases of association of two down channels Higher than predetermined threshold, and second time target serial number that two respective interconnection vectors of down channel are residing in its orderly base It is whether different, so that it is determined that wishing whether the user equipment 2A of selection is eligible.

When user equipment selection device 44 determines that its desired user equipment selected meets above-mentioned condition, user equipment Selection device 44, which determines, selects the user equipment to carry out CoMP CB.When user equipment selection device 44 determines its desired selection User equipment when being unsatisfactory for above-mentioned condition, in one embodiment, user equipment selection device 44 can re-start selection, Or in another embodiment, user equipment selection device 44 can abandon this dispatcher meeting.

In one embodiment, when the dispatching priority of base station is not highest or is secondary high, user equipment selection device 44 By the user equipment of the selector conjunction above-mentioned condition only in non-CoMP CB users equipment.

Then, user equipment selection instruction message sending device 48 sends to other collaboration base stations and indicates selected by this base station User equipment message, wherein the message package includes this base station to the label and this base of the down channel of the user equipment The label of the down channel for the CoMP CB candidate user devices serviced to other collaboration base stations of standing.As described above, user equipment Selection instruction message sending device 48 can send the message to other each collaboration base stations, can also be only lower to priority Base station sends the message.In this example, it is assumed that 2 selected user equipment of base station is 2C.The user equipment selection instruction of base station 2 Message sending device 48 can send the message for indicating selected user equipment 2C to base station 1, be { selected user equipment}。

Then, user equipment selection instruction message reception device 49 in above-described manner, base station is cooperateed with from other The message of instruction other collaboration selected user equipmenies in base station is received, wherein the message package includes other collaboration base stations extremely The collaboration base that cooperate with base stations from this other different is arrived in the label of the down channel of the user equipment and this other collaboration base stations The label of the down channel for the CoMP CB candidate user devices for standing serviced.In this example, the user equipment selection of base station 1 refers to Show that message receiving apparatus 49 receives message { the selected user equipment of instruction 2 selected user equipment 2C of base station from base station 2}。

In one embodiment, it (is not shown, hereinafter referred to as precoding square for generating the device 410 of pre-coding matrix Battle array generating means 410) according to other associations to the selected user equipment in this base station and to dispatching priority higher than this base station With the down channel { L of the selected CoMP CB candidate user devices in base station₁, L₂... L_n, wherein L₁For to dispatching priority The down channel of the highest selected CoMP CB candidate user devices in base station, and wherein { L₁, L₂... L_nEach The interconnection vector of down channel LiFor orderly baseK_iRow generate the pre-coding matrix for CoMP CB, In, the pre-coding matrix byComposition, whereinForK_iRow, wherein i =1 to n.

For example it is assumed that other collaborations to the selected user equipment in this base station and to dispatching priority higher than this base station The down channel of the selected CoMP CB candidate user devices in base station is { L₁, L₂, L₃, L₄, interconnection vector is { C_5,1, C_5,2, C_2,3, C_4,5, wherein the down channel to the selected CoMP CB candidate user devices in the highest base station of dispatching priority is L₁ (hereinafter referred to as the first down channel), interconnection vector C_5,1, it is C to be associated with orderly base₅.Then pre-coding matrix generates dress The pre-coding matrix for setting 410 generations will be by column vector C_5,1, C_5,2, C_5,3, C_5,5The matrix of composition, wherein using C_5,3, C_5,5It is approximate Replace C_2,3, C_4,5.Due to as described above, be Linear Rotation transformation relation between each orderly base, and selected each downlink letter The orderly base of association in roadIt is associated with orderly base with the first down channelThe degree of correlation meet third predetermined condition, can Think that the degree of correlation is higher than certain threshold value, then pre-coding matrix generating means 410 are usedCarry out approximate replacement C_{Vi, Ki}Composition is pre- Energy loss is smaller caused by encoder matrix.And due to C_{Vi, Ki}It can be byApproximate substitution, due to as previously mentioned, selected The interconnection vector C for each down channel selected_{Vi, Ki}The serial number of the second residing subscript Ki is different in respective orderly base, That is, pre-coding matrix generating means 410 can be usedIn have different second time target vector each to distinguish approximate substitution C_{Vi, Ki}.Due to as previously mentioned, orderly base in code book is the orderly base of multiple normal orthogonal, namelyIn there are different second subscripts Vectorial C_{V1, Ki}It is orthogonal, that is, each interconnection vector C of its approximated replacement_{Vi, Ki}Nearly orthogonal each other, therefore carrying out When downlink transfer, interference to each other is smaller.In aforementioned manners, pre-coding matrix generating means 410 can be according to selected The interconnection vector of down channel quickly generate pre-coding matrix for CoMP CB with orderly base is associated with, so as to avoid multiple Miscellaneous pre-coding matrix calculates, and improves system performance.

It should be noted that the present invention can be carried out in the assembly of software and/or software and hardware, for example, can adopt With application-specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment In, software program of the invention can be executed by processor to realize steps described above or function.Similarly, of the invention Software program (including relevant data structure) can be stored in computer readable recording medium storing program for performing, for example, RAM memory, Magnetic or optical driver or floppy disc and similar devices.In addition, hardware can be used to realize in some steps or function of the present invention, example Such as, coordinate to execute the circuit of each step or function as with processor.

In addition, the part of the present invention can be applied to computer program product, such as computer program instructions, when its quilt When computer executes, by the operation of the computer, it can call or provide according to the method for the present invention and/or technical solution. And the program instruction of the method for the present invention is called, it is possibly stored in fixed or moveable recording medium, and/or pass through Broadcast or the data flow in other signal loaded mediums and be transmitted, and/or be stored according to described program instruction operation In the working storage of computer equipment.Here, including a device according to one embodiment of present invention, which includes using Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to When order is executed by the processor, method and/or skill of the device operation based on aforementioned multiple embodiments according to the present invention are triggered Art scheme.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims Variation includes within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This Outside, it is clear that one word of " comprising " is not excluded for other units or step, and odd number is not excluded for plural number.That is stated in device claim is multiple Device can also be realized by a device by software or hardware.The first, the second equal words are used to indicate names, and not Indicate any specific sequence.

Claims

1. a kind of method in the base station of LTE-A network for carrying out collaboration multi-point cooperative beam forming CoMP CB, wherein The LTE-A network is linearly to revolve between the multiple orderly base using the code book for including the orderly bases of multiple multiple normal orthogonals Turn transformation relation, the method includes：

It obtains to the channel information of each down channel of each user equipment, each user equipment includes that this base station is serviced The CoMP CB candidate user devices that user equipment and other collaboration base stations are serviced；

According to the channel information of each down channel, determines in the multiple orderly base for each down channel and believe with the downlink The road degree of correlation meets interconnection vector of the vector of the first predetermined condition as the down channel, and by having where the interconnection vector Sequence base is determined as the orderly base of association of the down channel；

According to each interconnection vector of each down channel, the label of each down channel is generated, wherein the label can be used for referring to Show the interconnection vector；

According to the correlation of the label of each down channel and each down channel being respectively associated between orderly base Degree selects user equipment to carry out CoMP CB in the user equipment that this cell is serviced；

Also, the method further includes：

The message that the instruction selected user equipment in this base station is sent to other collaboration base stations, wherein the message package includes Ben Ji The CoMP CB candidates serviced to the label of the down channel of the user equipment and this base station to other collaboration base stations that stand use The label of the down channel of family equipment.

2. according to the method described in claim 1, wherein, the code book is C={ C₁,C₂,KC_N},C_i∈_C ^[T*T]For in code book C I-th of orderly base of multiple normal orthogonal, T are the antenna number of the base station, C_i,kFor orderly base C_iIn k-th of base vector,For To the channel matrix of the down channel of user equipment j,For the left characteristic vector for carrying out after singular value decomposition to the channel matrix The m of matrix is arranged, and is the feature vector corresponding to the corresponding down channel of m-th of characteristic value to user equipment j, In, the channel information according to each down channel, for each down channel determine in the multiple orderly base with the downlink The channel degree of correlation meets interconnection vector of the vector of the first predetermined condition as the down channel, and will be where the interconnection vector Orderly base is determined as the step of association orderly base of the down channel and includes：

The vectorial C for meeting the first predetermined condition with the down channel degree of correlation is determined according to following formula_i,kBelieve as the downlink The interconnection vector in road：

Wherein, Re () indicates to take the real part of the multiplication of complex numbers；

According to identified interconnection vector C_i,k, by the orderly base C where the vector_iIt is determined as being associated with for the down channel Sequence base.

3. method according to claim 1 or 2, wherein the code book is C={ C₁,C₂,KC_N},C_i,C_j∈ C are code book C In i-th and j-th orderly base, C_i,1For orderly base C_iIn the 1st base vector, C_j,1For orderly base C_jIn the 1st basic vector Amount, wherein the degree of correlation of each down channel being respectively associated between orderly base is：

Orderly base C is calculated according to following formula_i, C_jBetween degree of correlation γ (C_i,1,C_j,1)：

4. method according to any one of claim 1 to 2, wherein to its institute of instruction transmitted by other collaboration base stations Further include in the message of the user equipment of selection：

This base station is used for the scheduling priority information of next time slot.

5. method according to any one of claim 1 to 2, wherein further include：

The message that instruction other collaboration selected user equipmenies in base station are received from other collaboration base stations, wherein the message Including this other collaboration base stations to the label of the down channel of the user equipment and other collaboration base stations to this other The label of the down channel for the CoMP CB candidate user devices that the different collaboration base station in collaboration base station is serviced.

6. method according to any one of claim 1 to 2, wherein from other collaboration instructions for being received of base stations this its He cooperates in the message of the selected user equipment in base station：

Other described collaboration base stations are used for the scheduling priority information of next time slot.

7. according to the method described in claim 5, wherein, according to the label of each down channel and each downlink The degree of correlation of channel being respectively associated between orderly base selects user equipment to carry out CoMP in the user equipment that this cell is serviced The step of CB includes：

According to the correlation of the label of each down channel and each down channel being respectively associated between orderly base Degree, and according to the message for indicating other collaboration selected user equipmenies in base station received from other collaboration base stations, at this Selection meets the user equipment progress CoMP CB of following condition in the user equipment that cell is serviced：

When selected user equipment is non-CoMP CB candidate user devices, this base station is set to its own selected user Standby down channel cooperate with the selected CoMP CB in base station candidates with this base station to dispatching priority higher than other of this base station Meet the second predetermined condition between the down channel of user equipment；

When selected user equipment is CoMP CB candidate user devices, this base station to its own selected user equipment Down channel, cooperate with the selected CoMP CB candidates in base station use higher than other of this base station with this base station to dispatching priority Meet the second predetermined condition between the down channel of family equipment, also, dispatching priority is arrived higher than other collaboration base stations of this base station The down channel of the selected CoMP CB candidate user devices in this base station is cooperateed with dispatching priority higher than other of this base station Base station meets the second predetermined condition between the down channel of its own selected CoMP CB candidate user devices；

The degree of correlation between the orderly base of association of each down channel meets third predetermined condition, and the interconnection vector of each down channel exists Second time residing target serial number is different in its orderly base.

8. method according to any one of claim 1 to 2, wherein according to the label of each down channel with And the degree of correlation of each down channel being respectively associated between orderly base, in the multiple user equipment select user equipment into The step of row CoMP CB further includes：

The weight of CoMP CB candidate user devices is adjusted according to dispatching priority.

9. method according to any one of claim 1 to 2, wherein after selecting user equipment, the method is also wrapped It includes：

Selected by other collaboration base stations to the selected user equipment in this base station and to dispatching priority higher than this base station Down channel { the L for the CoMP CB candidate user devices selected₁,L₂,…L_n, wherein L₁For to the highest base station institute of dispatching priority The down channel of the CoMP CB candidate user devices of selection, and wherein { L₁,L₂,…L_nEach down channel Li pass Connection vectorFor orderly baseK_iRow generate the pre-coding matrix for CoMP CB, wherein the precoding square Battle array by Composition, whereinForK_iRow, wherein i=1 to n.

10. method according to any one of claim 1 to 2, wherein further including：

According to the channel information of each down channel and/or the measurement result from each user equipment, CoMP is determined CB candidate user devices；

The information of the CoMP CB candidate user devices is sent to other collaboration base stations.

11. method according to any one of claim 1 to 2, wherein further include：

The information of the CoMP CB candidate user devices of other collaboration base stations is received from other collaboration base stations.

12. a kind of device in the base station of LTE-A network for carrying out collaboration multi-point cooperative beam forming CoMP CB, wherein The LTE-A network is linearly to revolve between the multiple orderly base using the code book for including the orderly bases of multiple multiple normal orthogonals Turn transformation relation, described device includes：

Device for obtaining the channel information to each down channel of each user equipment, each user equipment includes this base It stands serviced user equipment and other CoMP CB candidate user devices for being serviced of collaboration base stations；

For according to the channel information of each down channel, for each down channel determine in the multiple orderly base under this The row channel degree of correlation meets interconnection vector of the vector of the first predetermined condition as the down channel, and will be where the interconnection vector Orderly base be determined as the down channel the orderly base of association device；

For each interconnection vector according to each down channel, the label of each down channel is generated, wherein the label is available In the device for indicating the interconnection vector；

For according to the label of each down channel and being respectively associated between orderly base for each down channel The degree of correlation selects user equipment to carry out the device of CoMP CB in the user equipment that this cell is serviced；

Also, described device further includes：

Device for the message for sending from the instruction selected user equipment in this base station to other collaboration base stations, wherein described disappear Breath includes the CoMP that this base station is serviced to the label of the down channel of the user equipment and this base station to other collaboration base stations The label of the down channel of CB candidate user devices.

13. device according to claim 12, wherein the code book is C={ C₁,C₂,KC_N},C_i∈C^[T*T]For code book C In i-th of multiple orderly base of normal orthogonal, T is the antenna number of the base station, C_i,kFor orderly base C_iIn k-th of base vector,For to the channel matrix of the down channel of user equipment j,For the left side for carrying out after singular value decomposition to the channel matrix Feature matrix m row, for the feature corresponding to the corresponding down channel of m-th of characteristic value to user equipment j to Amount, wherein the channel information for according to each down channel determines for each down channel in the multiple orderly base Meet interconnection vector of the vector as the down channel of the first predetermined condition with the down channel degree of correlation, and by the association to The device that orderly base where amount is determined as the orderly base of association of the down channel is used for：

14. device according to claim 12 or 13, wherein the code book is C={ C₁,C₂,KC_N},C_i,C_j∈ C are code I-th and j-th orderly base in this C, C_i,1For orderly base C_iIn the 1st base vector, C_j,1For orderly base C_jIn the 1st Base vector, wherein the degree of correlation of each down channel being respectively associated between orderly base is：

15. according to device described in any one of claim 12 to 13, wherein to other collaboration base stations transmitted by instruction its Further include in the message of selected user equipment：

16. according to device described in any one of claim 12 to 13, wherein further include：

Device for receiving the message for indicating other collaboration selected user equipmenies in base station from other collaboration base stations, Described in message include this other collaboration base stations to the label of the down channel of the user equipment and other collaboration base stations The label of the down channel of the CoMP CB candidate user devices serviced to the collaboration base station different from other collaboration base stations.

17. according to device described in any one of claim 12 to 13, wherein the instruction received from other collaboration base stations should Further include in the message of other collaboration selected user equipmenies in base station：

18. device according to claim 16, wherein for according to the label of each down channel and described The degree of correlation of each down channel being respectively associated between orderly base, in the user equipment that this cell is serviced select user equipment into The device of row CoMPCB is used for：

19. according to device described in any one of claim 12 to 13, wherein for according to described in each down channel The degree of correlation of label and each down channel being respectively associated between orderly base, user is selected in the multiple user equipment The device that equipment carries out CoMP CB is additionally operable to：

20. according to device described in any one of claim 12 to 13, wherein further include the device for generating pre-coding matrix, It is used for after selecting user equipment,：

21. according to device described in any one of claim 12 to 13, wherein further including：

For according to the channel information of each down channel and/or the measurement result from each user equipment, determining The device of CoMP CB candidate user devices；

Device for the information for sending from the CoMP CB candidate user devices to other collaboration base stations.

22. according to device described in any one of claim 12 to 13, wherein further include：

The device of the information of CoMP CB candidate user devices for receiving other collaboration base stations from other collaboration base stations.

23. a kind of base station including any one of claim 12-22 described devices.