CN103619022A - Method and device for interference coordination between cells in heterogeneous network - Google Patents

Method and device for interference coordination between cells in heterogeneous network Download PDF

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CN103619022A
CN103619022A CN201310659286.XA CN201310659286A CN103619022A CN 103619022 A CN103619022 A CN 103619022A CN 201310659286 A CN201310659286 A CN 201310659286A CN 103619022 A CN103619022 A CN 103619022A
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base station
indication message
coupling
abs pattern
coding matrix
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CN103619022B (en
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黄蓉
李福昌
陈国利
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention provides a method and a device for interference coordination between cells in a heterogeneous network, relates to the field of communication, and can effectively guarantee the QoS requirement of UE in a QoS requirement system of the UE. The method comprises the steps that a first base station sends a paging message to the first UE, and after the first UE receives the paging message, the UE feeds back an interference parameter when detecting the interference parameter of a second base station exceeds a threshold value; the first base station calculates to obtain an ABS pattern according to the interference parameter and the QoS requirement of the first UE; the ABS pattern is sent to the second base station, after the second base station judges that the ABS pattern can be configured according to the QoS requirement of the UE served by the second base station, the second base station feeds back an indication message indicating that the second base station can configure the ABS pattern to the first base station, and therefore the first base station transmits data to the first UE on a subframe, reserved to be blank, of the second base station.

Description

The method and apparatus of interference coordination between a kind of heterogeneous network small area
Technical field
The present invention relates to communication network, relate in particular to the method and apparatus of interference coordination between a kind of heterogeneous network small area.
Background technology
Growing along with the prosperity of intelligent terminal and user data rate demand, traditional mobile communications network is all no longer can meet the demands from coverage or from the angle of speed.Therefore 3GPP(3rd Generation Partnership Project, third generation partner program) based on LTE(Long Term Evolution, Long Term Evolution) propose to introduce heterogeneous network technology and solve this problem.Described heterogeneous network technology refers to is disposing the LPN (Low Power Node, low power nodes) as femto base station, femto base station, via node in macro base station coverage area.The deployment of these LPN can be expanded well covering, improve network transmission speed.
Heterogeneous network technology based on above-mentioned, the coverage of LPN is completely in the coverage in macro base station, therefore in the LPN of LPN cell edge UE(Use Equipment, subscriber equipment) can be subject to the strong jamming of macrocell, and in the macrocell UE at macrocell edge, can be subject to being adjacent the strong jamming of LPN community, therefore how the interference between effective coordination macrocell YuLPN community becomes the problem of the main consideration of current heterogeneous network technology.
The method of coordinating the interference between macrocell YuLPN community in prior art is mainly divided into time domain and the large class of frequency domain two.
The method of time domain is to adopt ABS (Almost Blank Subframe, almost blank subframe) technology ，Ji LPN community some locational sub-frame configuration can be become to almost blank subframe, in these approximate blank subframe Shang， LPN communities, will not send data.Like this, while providing service for the UE in macrocell edge in the subframe of macrocell on described correspondence position, the interference that the subframe of macrocell on correspondence position is subject to will be very little.
The method of frequency domain is to adopt frequency band division scheme, by the frequency resource in network is divided, makes the macrocell HeLPN community of phase mutual interference in network use different frequency bands completely or only at cell edge, divide different frequency bands, avoids presence of intercell interference.Example, macrocell central user adopts frequency band F1 and F3, edge customer adopts frequency band F2, LPN Cell Center User adopts frequency band F1 and F2, edge customer adopts frequency band F3, in the frequency resource that simultaneously Liang Ge community takies at edge customer, transmitted power used will be higher than other frequency resources, thereby effectively reduce the interference that two class Cell Edge User are subject to.
As from the foregoing, in prior art, for the interference between effective coordination macrocell YuLPN community, macrocell HeLPN community need to be at some time domains transmitting data not, or can not use some frequency band, in other words, it is disabled in macrocell HuoLPN community, having part resource, the in the situation that in system, UE being more like this, arranging of the division of frequency band or ABS will cause the UE that macrocell HeLPN community can load to reduce in a large number, the QoS(Quality of Service that may cause UE, service quality) demand cannot be met.
Summary of the invention
Embodiments of the invention provide the method and apparatus of interference coordination between a kind of heterogeneous network small area, effectively guarantee the QoS demand of the UE of system.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A method for interference coordination between heterogeneous network small area, comprising:
The first base station sends beep-page message to first user equipment UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback;
Described the first base station receives the interference parameter of a described UE feedback; And according to the service quality QoS demand of described interference parameter and a described UE, carry out almost blank subframe ABS needs estimate, obtain ABS pattern;
Described the first base station sends described ABS pattern to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message;
Described the first base station receives described Indication message;
If described Indication message indicates described the second base station can configure described ABS pattern,, described the first base station is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data;
Wherein, described the first base station is macro base station, and described the second base station is low power base station LPN; Or described the second base station is macro base station, described the first base station is LPN.
A method for interference coordination between heterogeneous network small area, comprising:
The second base station receives the almost blank subframe ABS pattern that the first base station sends;
Can described the second base station judgement, when meeting the QoS demand of UE of its service, configure described ABS pattern;
If can configure described ABS pattern, described the second base station configures described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data;
Wherein, described the first base station is macro base station, and described the second base station is low power base station LPN; Or described the second base station is macro base station, described the first base station is LPN.
First base station, comprising:
Transmitting element, for sending beep-page message to first user equipment UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback;
Receiving element, for receiving the interference parameter of a described UE feedback;
Processing unit, for the described interference parameter that receives according to receiving element and the service quality QoS demand of a described UE, carries out almost blank subframe ABS needs estimate, obtains ABS pattern;
Described transmitting element, the described ABS pattern also obtaining for send described processing unit to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message;
Described receiving element, also for receiving described Indication message;
Described processing unit, while also indicating described the second base station can configure described ABS pattern for the described Indication message receiving at described receiving element, is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data.
Second base station, comprising:
Receiving element, the almost blank subframe ABS pattern sending for receiving the first base station;
Can processing unit, for judging when meeting the QoS demand of UE of its service, configure described ABS pattern;
Described processing unit, for judging can configure described ABS pattern time, configure described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data.
The method of interference coordination between the heterogeneous network small area that the embodiment of the present invention provides, by the first base station according to described the second base station the QoS demand to a described UE interference parameter and a described UE, calculate and obtain ABS pattern, and while going out to configure described ABS pattern according to the QoS demand estimation of the UE of its service in described the second base station, according to described ABS pattern, in described the second base station, be left in blank subframe to UE transmission data.Method provided by the invention, only in the situation that meet the QoS demand of the QoS demand of a described UE and the UE of described the second base station service, adopts ABS pattern to transmit, and can effectively guarantee the QoS demand of UE.
Accompanying drawing explanation
The method flow schematic diagram of interference coordination between a kind of heterogeneous network small area that Fig. 1 provides for the embodiment of the present invention 1;
The method flow schematic diagram of interference coordination between the another kind of heterogeneous network small area that Fig. 2 provides for the embodiment of the present invention 1;
The method flow schematic diagram of interference coordination between a kind of heterogeneous network small area that Fig. 3 provides for the embodiment of the present invention 2;
A kind of heterogeneous network system configuration diagram that Fig. 4 provides for the embodiment of the present invention 2;
A kind of ABS pattern schematic diagram that Fig. 5 provides for the embodiment of the present invention 2;
A kind of the first architecture of base station block diagram that Fig. 6 provides for the embodiment of the present invention 3;
A kind of the second architecture of base station block diagram that Fig. 7 provides for the embodiment of the present invention 3.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In the technical scheme that the embodiment of the present invention provides, relating to two kinds of base station-the first base stations and the second base station, there are following two kinds of situations in these two kinds of base stations, and a kind of situation is: described the first base station is macro base station, and described the second base station is LPN; Another kind of situation is: described the second base station is macro base station, and described the first base station is LPN.
The embodiment of the present invention provides the method for interference coordination between a kind of heterogeneous network small area, and its executive agent is the first base station, and as shown in Figure 1, described method comprises:
101, the first base station sends beep-page message to a UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.
A described UE is the UE of described the first base station service, described the first base station is when needs transmit data to a UE, can send beep-page message to a described UE, a described UE receives after described beep-page message, will send page-response message to described the first base station, a described UE can measure the interference parameter of the second base station simultaneously, and when the interference parameter that the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.
102, described the first base station receives the interference parameter of a described UE feedback; And according to the service quality QoS demand of described interference parameter and a described UE, carry out almost blank subframe ABS needs estimate, obtain ABS pattern.
Described the first base station can be calculated as the needed running time-frequency resource of described UE transmission data according to the QoS demand of the interference parameter receiving and a described UE, thereby carries out ABS needs estimate, obtains ABS pattern.Wherein, in described ABS pattern, indicate which sub-frame configuration described the second base station need to be blank subframe by, and described the first base station is while sending data by these blank subframe to a described UE, can meet the QoS demand of a described UE.
103, described the first base station sends described ABS pattern to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message.
Described the first base station obtains after described ABS pattern in step 102, described ABS pattern can be sent to described the second base station, described the second base station can judge after receiving described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, still can meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can configure described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, can not meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can not configure described ABS pattern.Can described the second base station configure after described ABS pattern judging, can be to described the first base station feedback Indication message.
104, described the first base station receives described Indication message.
If 105 described Indication messages indicate described the second base station can configure described ABS pattern,, described the first base station is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data.
If described the second base station is judged described the second base station and is configured described ABS pattern, described Indication message indicates described the second base station to configure described ABS pattern, and described the first base station is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data.
Example, suppose to indicate that described the second base station need to be blank subframe by the 4th sub-frame configuration in the ABS pattern that described in step 102, the first base station obtains, in step 105, described Indication message indicates described the second base station to configure described ABS pattern, and described the first base station just can be to described UE transmission data in the 4th subframe.Because described the second base station is blank subframe by described the 4th sub-frame configuration, therefore in described the 4th subframe, described the second base station can not send data, and now described the first base station in the 4th subframe to described UE transmission data, so time described in a UE just can not be subject to the interference of described the second base station.
The embodiment of the present invention also provides the method for interference coordination between a kind of heterogeneous network small area, and its executive agent is the second base station, and as shown in Figure 2, described method comprises:
201, the second base station receives the almost blank subframe ABS pattern that the first base station sends.
Described the first base station is when needs transmit data to a UE, can send beep-page message to a described UE, a described UE receives after described beep-page message, will send page-response message to described the first base station, a described UE can measure the interference parameter of the second base station simultaneously, and when the interference parameter that the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.Described the first base station can be calculated as the needed running time-frequency resource of described UE transmission data according to the QoS demand of the interference parameter receiving and a described UE, thereby carry out ABS needs estimate, obtain ABS pattern, then, described the first base station will send to described the second base station by described ABS pattern.Wherein, in described ABS pattern, indicate which sub-frame configuration described the second base station need to be blank subframe by, and described the first base station is while sending data by these blank subframe to a described UE, can meet the QoS demand of a described UE.
202, can described the second base station judgement, when meeting the QoS demand of UE of its service, configure described ABS pattern.
Described the second base station can judge after receiving described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, still can meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can configure described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, can not meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can not configure described ABS pattern.
If 203 configure described ABS pattern, described the second base station configures described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data.
When described the second base station is judged described the second base station and can be configured described ABS pattern, even if show that described the second base station has configured described ABS pattern, still can meet the QoS demand of the UE of described the second base station self service, now, described the second base station just can configure described ABS pattern, described like this first base station just can be left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data, and when blank subframe, described the second base station can not send data, therefore a described UE just can not be subject to the interference of described the second base station.
The method of interference coordination between the heterogeneous network small area that the embodiment of the present invention provides, by the first base station according to described the second base station the QoS demand to a described UE interference parameter and a described UE, calculate and obtain ABS pattern, and while going out to configure described ABS pattern according to the QoS demand estimation of the UE of its service in described the second base station, according to described ABS pattern, in described the second base station, be left in blank subframe to UE transmission data.Method provided by the invention, only in the situation that meet the QoS demand of the QoS demand of a described UE and the UE of described the second base station service, adopts ABS pattern to transmit, and can effectively guarantee the QoS demand of UE.
Embodiment 2
The embodiment of the present invention provides the method for interference coordination between a kind of heterogeneous network small area, the method is applied to include in the system of the first base station and the second base station, the step that carry out described the first base station comprises the step described in Fig. 1 in embodiment 1, the step that carry out described the second base station comprises the step described in Fig. 2 in embodiment 1, as shown in Figure 3, described method comprises:
301, the first base station sends beep-page message to a UE.
A described UE is the UE of described the first base station service, and described the first base station, when needs transmit data to a described UE, can send beep-page message to a described UE.
302, a described UE, after receiving described beep-page message, detects the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.
Described the first base station is when needs transmit data to a described UE, can send beep-page message to a described UE, a described UE receives after described beep-page message, will send page-response message to described the first base station, a described UE can measure the interference parameter of the second base station simultaneously, and when the interference parameter that the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.
Certainly, if the interference parameter of the second base station detected, do not surpass threshold value, a described UE just can not send to described the first base station the interference parameter of described the second base station.This just shows that described the second base station can not produce and disturb a described UE, therefore when described the first base station does not receive the interference parameter of described the second base station, described the first base station will be normally to described UE transmission data.
Example, described interference parameter can be signal strength signal intensity, a described UE can measure the signal strength signal intensity of described the second base station, if the signal strength signal intensity of described the second base station detected, surpass threshold value, illustrate that described the second base station can produce strong jamming to a described UE, now a described UE just can feed back to this signal strength signal intensity described the first base station.
303, described the first base station receives the interference parameter of a described UE feedback; And according to the service quality QoS demand of described interference parameter and a described UE, carry out almost blank subframe ABS needs estimate, obtain ABS pattern.
Described the first base station can be calculated as the needed running time-frequency resource of described UE transmission data according to the QoS demand of the interference parameter receiving and a described UE, thereby carries out ABS needs estimate, obtains ABS pattern.Wherein, in described ABS pattern, indicate which sub-frame configuration described the second base station need to be blank subframe by, and described the first base station is while sending data by these blank subframe to a described UE, can meet the QoS demand of a described UE.
304, described the first base station sends described ABS pattern to the second base station.
305, can described the second base station judgement, when meeting the QoS demand of UE of its service, configure described ABS pattern.
Described the second base station can judge after receiving described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, still can meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can configure described ABS pattern, if described the second base station according to described ABS pattern arrangement after blank subframe, can not meet the QoS demand of the UE of described the second base station self service, judge described the second base station and can not configure described ABS pattern.
If can configure, carry out step 306-307, if can not configure, carry out step 308-311.
306, described the second base station configures described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern.
Example, in described Indication message, can carry a sign ABS_IND, if described ABS_IND=1, show that described Indication message indicates described the second base station can configure described ABS pattern, if described ABS_IND=0, shows that described Indication message indicates described the second base station can not configure described ABS pattern.
307, described the first base station is left in described the second base station according to described ABS pattern in blank subframe to UE transmission data.
When blank subframe, described the second base station does not send data, and described the first base station is to described UE transmission data, therefore a described UE just can not be subject to the interference of described the second base station.
Like this, only in the situation that meet the QoS demand of the QoS demand of a described UE and the UE of described the second base station service, adopt ABS pattern to transmit, can effectively guarantee the QoS demand of UE.
308, described the second base station is to described the first base station feedback Indication message, and described Indication message indicates described the second base station not configure described ABS pattern.
309, described the first base station sends and measures Indication message to a described UE, so that a described UE measures and feeds back the first channel information between a described UE and described the first base station, and the second channel information between a described UE and described the second base station.
310, described the first base station receives described the first channel information and the second channel information of a described UE feedback.
311, described the first base station is according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, wherein, the WeiLPN community, community that described LPN covers.
Here it should be noted that, the flexibility because LPN disposes, can be operated under following three kinds of patterns:
A, open: in network, all UE(comprise macrocell UEHe LPN community UE) all can access LPN community, and between each UE, there is no priority difference.Example, described LPN community can be the Hot Spot that operator oneself disposes.
B, hybrid: in network, all UE all can access LPN community, but the right that signing UE has priority access LPN community is carried out in YuLPN community.
C, closed: i.e. closed user group formula, only have YuLPN community to carry out signing UE and could access LPN community, and other UE all can not access, example, described LPN community can be the community of oneself disposing and not allowing other people to access in company or family.
Described the first base station is after receiving described the first channel information and described second channel information, can carry out the selection of cooperation transmission mode by the mode of operation of LPN community, even LPN community is closed, adopt CS/CB(Coordinated Scheduling/Beamforming, cooperative scheduling/wave beam forming) mode is to described UE transmission data, RuoLPN community is open or hybrid, adopting JT(Joint Transmission, combine transmission) mode is to described UE transmission data.
Wherein, it should be noted that, CS/CB refers on same Resource Block, and a plurality of communities are chosen respectively two lower UE of wave beam forming correlation by scheduling and transmitted, and each community be only that self service UE is transmitted data; JT refers on same Resource Block, a plurality of communities are through consulting to form a large multi-antenna base station, on a Resource Block, dispatch a plurality of these communities UE that belong to, each community needs to send the data of all UE simultaneously, and this process can be regarded as the process of multi-user multi-antenna transmission.CS/CB and JT can utilize resource more fully, the UE number that can simultaneously serve in system is remained unchanged, compared to existing technology, adopt ABS technology system in some subframe can only serve a UE simultaneously, or in employing frequency band division, certain frequency band can only be served a UE and compared, can utilize more fully resource, for UE more provides service.
Optionally, when described LPN community is closed community, adopt CS/CB mode to described UE transmission data, step 311 comprises the following steps:
S1, described the first base station are according to described second channel information, calculate the disturbed condition that different pre-coding matrixes that described the second base station adopts described the first base station pre-stored cause a described UE, and according to described disturbed condition, described different pre-coding matrixes are sorted, obtain pre-coding matrix ordered set Ω.
In described the first base station, store a lot of different pre-coding matrixes, when described the first base station sends data to the UE of its service, described base station will therefrom select a pre-coding matrix to transmit.
Described the first base station obtains after the second channel information between a described UE and described the second base station, just can be according to described second channel information, calculate the disturbed condition that described the second base station adopts described different pre-coding matrixes to cause a described UE, concrete computational process all has a clear understanding of for those skilled in the art, does not repeat them here.Calculate after described disturbed condition, can sort to described different pre-coding matrixes according to described disturbed condition in described the first base station, obtain pre-coding matrix ordered set Ω, it in described Ω, can be disturbed condition sequence from big to small, also can be disturbed condition sequence from small to large, at this, not limit.
S2, described the first base station send to described the second base station by described Ω.
S3, described the second base station judge whether that existence meets the first pre-conditioned coupling UE and coupling pre-coding matrix.
Described the first pre-conditioned comprising: when described the second base station adopts and mates pre-coding matrix in described Ω described coupling UE is carried out to transfer of data, not only meet the QoS demand of described coupling UE, and the interference of a described UE is not surpassed to threshold value.The interference of a described UE is not surpassed to the QoS demand that threshold value shows to meet a described UE here.
If exist, carry out step S4-S5, if do not exist, carry out step S6-S7.
S4, described the second base station adopt described coupling pre-coding matrix to described coupling UE transmission data, and described the second base station sends match condition Indication message to described the first base station; The match is successful in described match condition Indication message indication.
Example, in described match condition Indication message, can carry a sign MATCH_IND, if described MATCH_IND=1, the match is successful to show described match condition Indication message indication, if described ABS_IND=0, shows that described match condition Indication message indication coupling is unsuccessful.
S5, described the first base station receive after described match condition Indication message, according to described the first channel information, calculate the laser propagation effect of described the first base station while adopting described different pre-coding matrixes to transmit a described UE, obtain the best optimum pre-coding matrix of described laser propagation effect, and adopt described optimum pre-coding matrix to carry out transfer of data to a described UE.
Described the first base station obtains after the first channel information between a described UE and described the first base station, just can be according to described the first channel information, calculate the laser propagation effect of described the first base station while adopting described different pre-coding matrixes to transmit a described UE, concrete computational process all has a clear understanding of for those skilled in the art, does not repeat them here.Calculate after described laser propagation effect, the optimum pre-coding matrix that best laser propagation effect is corresponding can be selected in described the first base station, to described UE, carries out transfer of data.
Like this, on same Resource Block, described the first base station adopts optimum pre-coding matrix to described UE transmission data, when described the second base station adopts described coupling pre-coding matrix to described coupling UE transmission data, described the second base station is just very little to the interference of a described UE, be that described the first base station and described the second base station are chosen respectively two lower UE of wave beam forming correlation and transmitted, very little to the interference of a described UE.
Like this with employing ABS technology of the prior art or employing frequency band division technology, a Resource Block (as some subframes or some frequency bands) is only served a UE and is compared, the method that the embodiment of the present invention provides can improve resource utilization, and has guaranteed the QoS demand of each UE.
S6, described the second base station send match condition Indication message to described the first base station; Described match condition Indication message indication coupling is unsuccessful.
S7, described the first base station abandon carrying out transfer of data to a described UE.
If do not exist, no matter how explanation transmits the QoS demand that all can not meet each UE, and this just means that described the first base station cannot provide satisfied QoS for a described UE, and therefore, abandon as a UE service described the first base station.
Optionally, described LPN community is open community or hybrid community, adopts JT mode to described UE transmission data, and step 311 comprises the following steps:
Q1, described the first base station send described the first channel information and described second channel information to described the second base station.
Q2, described the second base station judge whether that according to described the first channel information and described second channel information existence meets the second pre-conditioned coupling UE.
Wherein, described the second pre-conditioned comprising: described the second base station is to described coupling UE transmission data, in the situation that meet the QoS demand of described coupling UE, throughput of system is maximum.
If exist, carry out step Q3-Q5, if do not exist, carry out step Q6-Q7.
Q3, described the second base station are calculated and are obtained a described UE and optimal joint pre-coding matrix corresponding to described coupling UE, and adopt the second pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and coupling UE, carry out transfer of data.
Here, described the second base station and the first base station can be formed to a large multi-antenna base station, the one UE and coupling UE are as two UE under this large base station, carry out multi-antenna multi-user MIMO(Multiple-Input Multiple-Output, multiple-input and multiple-output) transmission, calculate optimal joint pre-coding matrix, its concrete calculated case is what those skilled in the art know that, is not described in detail in this.
MIMO transmission just can be carried out in described like this second base station, adopts the second pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, and to a described UE and coupling UE, carries out transfer of data.
Q4, described the second base station send to described the first base station the match condition Indication message that carries described optimal joint pre-coding matrix and described coupling UE information, and the match is successful in described match condition Indication message indication.
Q5, described the first base station receive described match condition Indication message, and adopt the first pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, and to a described UE and described coupling UE, carry out transfer of data.
Like this with employing ABS technology of the prior art or employing frequency band division technology, a Resource Block (as some subframes or some frequency bands) is only served a UE and is compared, the method that the embodiment of the present invention provides can improve resource utilization, and has guaranteed the QoS demand of each UE.
Q6, described the second base station send match condition Indication message to described the first base station; Described match condition Indication message indication coupling is unsuccessful.
Q7, described the first base station abandon carrying out transfer of data to a described UE.
If do not exist, no matter how explanation transmits the QoS demand that all can not meet each UE, and this just means that described the first base station cannot provide satisfied QoS for a described UE, and therefore, abandon as a UE service described the first base station.
The heterogeneous network system shown in Fig. 4 of take below illustrates the method that the embodiment of the present invention provides as example.In the heterogeneous network system shown in Fig. 4, in the macrocell that macro base station 41 covers, be deployed with a plurality of LPN, suppose that described the first base station is macro base station 41 here, described the second base station is LPN42, a described UE43 is the signing UE of described macro base station 41, a described UE43 is in macrocell edge, from described LPN42 cover LPN community very close to, be easily subject to the strong jamming of described LPN42.
As shown in Figure 4, described macro base station 41 is when to described UE43 transmission data, can send beep-page message to a described UE43, a described UE43 receives after described beep-page message, will send page-response message to described macro base station 41, a described UE43 can measure the interference parameter of LPN42 simultaneously, and the interference parameter that a described UE43 can detect LPN42 surpasses threshold value, and a UE43 is just to the described interference parameter of described macro base station 41 feedback.
Macro base station 41 receives after the interference parameter of a described UE43 feedback, can be according to the service quality QoS demand of described interference parameter and a described UE, carry out ABS needs estimate, obtain ABS pattern as shown in Figure 5, in described ABS pattern, indicate that described the second base station need to be blank subframe by the 4th sub-frame configuration, described macro base station 41 sends to LPN42 by the ABS pattern shown in Fig. 5, described LPN42 judgement is when meeting the QoS demand of UE of its service, can configure described ABS pattern, because only have a UE44 in described LPN42, even the resource in described LPN42 configured ABS pattern also completely can load described in UE44, therefore described LPN42 can judge when meeting the QoS demand of UE44 of its service, can configure described ABS pattern, therefore the ABS pattern of described LPN42 shown in will allocation plan 5, and send to described macro base station 41 Indication message that carries judged result ABS_IND=1, described macro base station 41 receives just to be known described LPN42 after described Indication message and can configure described ABS pattern, therefore described macro base station 41 will be left in the 4th blank subframe to UE transmission data at described LPN42 according to described ABS pattern.In described the 4th subframe, described LPN42 can not send data like this, and now described macro base station 41 in the 4th subframe to described UE43 transmission data, so time described in a UE43 just can not be subject to the interference of described LPN42.
Like this, only in the situation that meet the QoS demand of the QoS demand of a described UE and the UE of described the second base station service, adopt ABS pattern to transmit, can effectively guarantee the QoS demand of UE.
Certainly, if there are a lot of UE44 in LPN42, described LPN42 is after having configured described ABS pattern, its resource does not likely meet the QoS demand of the UE44 of its service, now, described LPN42 will send the Indication message that carries judged result ABS_IND=0 to described macro base station 41, and described like this macro base station will select to adopt CS/CB according to the mode of operation of LPN42, or select to adopt the mode of JT to UE43 transmission data, detailed process can be with reference to above-mentioned method.
The method of interference coordination between the heterogeneous network small area that the embodiment of the present invention provides, by the first base station according to described the second base station the QoS demand to a described UE interference parameter and a described UE, calculate and obtain ABS pattern, and while going out to configure described ABS pattern according to the QoS demand estimation of the UE of its service in described the second base station, according to described ABS pattern, in described the second base station, be left in blank subframe to UE transmission data.Method provided by the invention, only in the situation that meet the QoS demand of the QoS demand of a described UE and the UE of described the second base station service, adopts ABS pattern to transmit, and can effectively guarantee the QoS demand of UE.
In addition, when described the second base station can not configure ABS pattern, CS/CB can be selected to adopt according to the mode of operation of LPN community in described the first base station, or select to adopt the mode of JT to UE transmission data, described CS/CB or JT mode can be for a plurality of UE provide service on a Resource Block, utilize more fully resource, the UE number that can simultaneously serve in system is remained unchanged, in some subframes, can only serve a UE with of the prior art simultaneously, or some frequency bands can only be served a UE and compared, can utilize more fully resource, for UE more provides service.
Embodiment 3
The embodiment of the present invention has further provided the device embodiment that realizes each step and method in above-described embodiment 1 and embodiment 2.
As shown in Figure 6, be a kind of the first base station that the embodiment of the present invention provides, described the first base station comprises: transmitting element 601, receiving element 602 and processing unit 603.
Transmitting element 601, for sending beep-page message to first user equipment UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback.
Receiving element 602, for receiving the interference parameter of a described UE feedback.
Processing unit 603, for the described interference parameter that receives according to receiving element 602 and the service quality QoS demand of a described UE, carries out almost blank subframe ABS needs estimate, obtains ABS pattern.
Described transmitting element 601, the described ABS pattern also obtaining for send described processing unit 603 to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message.
Described receiving element 602, also for receiving described Indication message.
Described processing unit 603, while also indicating described the second base station can configure described ABS pattern for the described Indication message receiving at described receiving element 602, according to described ABS pattern, in described the second base station, be left in blank subframe to described UE transmission data.
When described Indication message indicates described the second base station can not configure described ABS pattern, described transmitting element 601, also for sending and measure Indication message to a described UE, so that a described UE measures and feeds back the first channel information between a described UE and described the first base station, and the second channel information between a described UE and described the second base station.
Described receiving element 602, also for receiving described the first channel information and the second channel information of a described UE feedback.
Described processing unit 603, also for according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, wherein, the WeiLPN community, community that described LPN covers.
If described LPN community is closed community,,
Described processing unit 603, also for according to described second channel information, calculate the disturbed condition that different pre-coding matrixes that described the second base station adopts described the first base station pre-stored cause a described UE, and according to described disturbed condition, described different pre-coding matrixes are sorted, obtain pre-coding matrix ordered set Ω; Described transmitting element 601, also sends to described the second base station for the described Ω that described processing unit 603 is obtained, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, sends match condition Indication message; Described receiving element 602, also for receiving described match condition Indication message; Described processing unit 603, when in the indication of described match condition Indication message, the match is successful, according to described the first channel information, calculate the laser propagation effect of described the first base station while adopting described different pre-coding matrixes to transmit a described UE, obtain the best optimum pre-coding matrix of described laser propagation effect, and adopt described optimum pre-coding matrix to carry out transfer of data to a described UE; When described match condition Indication message indication coupling is unsuccessful, abandon carrying out transfer of data to a described UE.
If described LPN community is open community or hybrid community,,
Described transmitting element 601, also for send described the first channel information and described second channel information to described the second base station, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, send the match condition Indication message that carries optimal joint pre-coding matrix and described coupling UE information; Described receiving element 602, also for receiving described match condition Indication message; Described processing unit 603, when the match is successful in the indication of described match condition Indication message, adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, corresponding row forms, and to a described UE and described coupling UE, carries out transfer of data; When described match condition Indication message indication coupling is unsuccessful, abandon carrying out transfer of data to a described UE.
The embodiment of the present invention also provides a kind of the second base station, and as shown in Figure 7, described the second base station comprises: receiving element 701 and processing unit 702.
Receiving element 701, the almost blank subframe ABS pattern sending for receiving the first base station;
Can processing unit 702, for judging when meeting the QoS demand of UE of its service, configure described ABS pattern;
Described processing unit 702, for judging can configure described ABS pattern time, configure described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data.
Judging can not configure described ABS pattern time, described processing unit 702, also for to described the first base station feedback Indication message, described Indication message indicates described the second base station can not configure described ABS pattern, so that described the first base station by with the cooperating of described the second base station, to described UE transmission data.
If it is closed community that described LPN covers LPN community,,
Described receiving element 701, the pre-coding matrix ordered set Ω also sending for receiving described the first base station; Described processing unit 702, specifically for: judge whether that existence meets the first pre-conditioned coupling UE and coupling pre-coding matrix, described the first pre-conditioned comprising: when described the second base station adopts and mates pre-coding matrix in described Ω described coupling UE is carried out to transfer of data, not only meet the QoS demand of described coupling UE, and the interference of a described UE is not surpassed to threshold value; Judging while existing, adopt described coupling pre-coding matrix to described coupling UE transmission data, and described the second base station sends match condition Indication message to described the first base station, the match is successful in described match condition Indication message indication, so that the best optimum pre-coding matrix of laser propagation effect in the different pre-coding matrixes of described the first base station employing pre-stored carries out transfer of data to a described UE; Judging while not existing, to described the first base station, sending match condition Indication message, described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE.
Or, if it is open community or hybrid community that described LPN covers LPN community,, described receiving element 701, also for receiving a described UE that described the first base station sends and the first channel information between described the first base station, and the second channel information between a described UE and described the second base station; Described processing unit 702, specifically for: according to described the first channel information and described second channel information, judge whether that existence meets the second pre-conditioned coupling UE, described the second pre-conditioned comprising: when described the second base station adopts Resource Block to described coupling UE transmission data, in the situation that meet the QoS demand of described coupling UE, throughput of system is maximum; Judging while existing, calculate and obtain a described UE and optimal joint pre-coding matrix corresponding to described coupling UE, and adopt the second pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data; To described the first base station, send the match condition Indication message that carries described optimal joint pre-coding matrix and described coupling UE information, the match is successful in described match condition Indication message indication, so that described the first base station adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data; Judging while not existing, to described the first base station, sending match condition Indication message; Described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.

Claims (14)

1. a method for interference coordination between heterogeneous network small area, is characterized in that, comprising:
The first base station sends beep-page message to first user equipment UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback;
Described the first base station receives the interference parameter of a described UE feedback; And according to the service quality QoS demand of described interference parameter and a described UE, carry out almost blank subframe ABS needs estimate, obtain ABS pattern;
Described the first base station sends described ABS pattern to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message;
Described the first base station receives described Indication message;
If described Indication message indicates described the second base station can configure described ABS pattern,, described the first base station is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data;
Wherein, described the first base station is macro base station, and described the second base station is low power base station LPN; Or described the second base station is macro base station, described the first base station is LPN.
2. method according to claim 1, is characterized in that, if described Indication message indicates described the second base station can not configure described ABS pattern,, described method also comprises:
Described the first base station sends and measures Indication message to a described UE, so that a described UE measures and feeds back the first channel information between a described UE and described the first base station, and the second channel information between a described UE and described the second base station;
Described the first base station receives described the first channel information and the second channel information of a described UE feedback;
Described the first base station is according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, wherein, the WeiLPN community, community that described LPN covers.
3. method according to claim 2, it is characterized in that, if described LPN community is closed community,, described the first base station is according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, comprising:
Described the first base station is according to described second channel information, calculate the disturbed condition that different pre-coding matrixes that described the second base station adopts described the first base station pre-stored cause a described UE, and according to described disturbed condition, described different pre-coding matrixes are sorted, obtain pre-coding matrix ordered set Ω;
Described the first base station sends to described the second base station by described Ω, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, sends match condition Indication message;
Described the first base station receives described match condition Indication message;
If the match is successful in described match condition Indication message indication,, described the first base station is according to described the first channel information, calculate the laser propagation effect of described the first base station while adopting described different pre-coding matrixes to transmit a described UE, obtain the best optimum pre-coding matrix of described laser propagation effect, and adopt described optimum pre-coding matrix to carry out transfer of data to a described UE;
If described match condition Indication message indication coupling is unsuccessful,, described the first base station abandons carrying out transfer of data to a described UE.
4. method according to claim 2, it is characterized in that, if described LPN community is open community or hybrid community,, described the first base station is according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, comprising:
Described the first base station sends described the first channel information and described second channel information to described the second base station, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, send the match condition Indication message that carries optimal joint pre-coding matrix and described coupling UE information;
Described the first base station receives described match condition Indication message;
If the match is successful in described match condition Indication message indication,, described the first base station adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, corresponding row forms, and to a described UE and described coupling UE, carries out transfer of data;
If described match condition Indication message indication coupling is unsuccessful,, described the first base station abandons carrying out transfer of data to a described UE.
5. a method for interference coordination between heterogeneous network small area, is characterized in that, comprising:
The second base station receives the almost blank subframe ABS pattern that the first base station sends;
Can described the second base station judgement, when meeting the service quality QoS demand of user equipment (UE) of its service, configure described ABS pattern;
If can configure described ABS pattern, described the second base station configures described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data;
Wherein, described the first base station is macro base station, and described the second base station is low power base station LPN; Or described the second base station is macro base station, described the first base station is LPN.
6. method according to claim 5, is characterized in that,
If can not configure described ABS pattern, described the second base station sends feedback Indication message to described the first base station, described Indication message indicates described the second base station can not configure described ABS pattern, so that described the first base station by with the cooperating of described the second base station, to described UE transmission data.
7. method according to claim 6, is characterized in that, comprising: if described LPN covers LPN community, be closed community, described method also comprises:
Described the second base station receives the pre-coding matrix ordered set Ω that described the first base station sends;
Described the second base station judges whether that existence meets the first pre-conditioned coupling UE and coupling pre-coding matrix, described the first pre-conditioned comprising: when described the second base station adopts and mates pre-coding matrix in described Ω described coupling UE is carried out to transfer of data, not only meet the QoS demand of described coupling UE, and the interference of a described UE is not surpassed to threshold value;
If judge existence, described the second base station adopts described coupling pre-coding matrix to described coupling UE transmission data, and described the second base station sends match condition Indication message to described the first base station, the match is successful in described match condition Indication message indication, so that the best optimum pre-coding matrix of laser propagation effect in the different pre-coding matrixes of described the first base station employing pre-stored carries out transfer of data to a described UE;
If judge, do not exist, described the second base station sends match condition Indication message to described the first base station; Described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE.
8. method according to claim 6, is characterized in that, if described LPN covers LPN community, is open community or hybrid community, and described method also comprises:
Described the second base station receives a described UE of described the first base station transmission and the first channel information between described the first base station, and the second channel information between a described UE and described the second base station;
Described the second base station judges whether that according to described the first channel information and described second channel information existence meets the second pre-conditioned coupling UE, described the second pre-conditioned comprising: when data are transmitted to described coupling UE in described the second base station, in the situation that meet the QoS demand of described coupling UE, throughput of system is maximum;
If judge existence, described the second base station is calculated and is obtained a described UE and optimal joint pre-coding matrix corresponding to described coupling UE, and adopt the second pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data;
Described the second base station sends to described the first base station the match condition Indication message that carries described optimal joint pre-coding matrix and described coupling UE information, the match is successful in described match condition Indication message indication, so that described the first base station adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data;
If judge, do not exist, described the second base station sends match condition Indication message to described the first base station; Described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE.
9. first base station, is characterized in that, comprising:
Transmitting element, for sending beep-page message to first user equipment UE, so that a described UE is after receiving described beep-page message, detect the interference parameter of the second base station, and when the interference parameter that described the second base station detected surpasses threshold value, to interference parameter described in described the first base station feedback;
Receiving element, for receiving the interference parameter of a described UE feedback;
Processing unit, for the described interference parameter that receives according to receiving element and the service quality QoS demand of a described UE, carries out almost blank subframe ABS needs estimate, obtains ABS pattern;
Described transmitting element, the described ABS pattern also obtaining for send described processing unit to the second base station, so that can described the second base station going out configure after described ABS pattern according to the QoS demand estimation of the UE of its service, to described the first base station feedback Indication message;
Described receiving element, also for receiving described Indication message;
Described processing unit, while also indicating described the second base station can configure described ABS pattern for the described Indication message receiving at described receiving element, is left in described the second base station according to described ABS pattern in blank subframe to described UE transmission data.
10. the first base station according to claim 9, is characterized in that,
Described transmitting element, also when indicating described the second base station can not configure described ABS pattern at described Indication message, to a described UE, send and measure Indication message, so that a described UE measures and feeds back the first channel information between a described UE and described the first base station, and the second channel information between a described UE and described the second base station;
Described receiving element, also for receiving described the first channel information and the second channel information of a described UE feedback;
Described processing unit, also for according to described the first channel information and described second channel information, for the type of LPN community, by with the cooperating of described the second base station, to described UE transmission data, wherein, the WeiLPN community, community that described LPN covers.
11. the first base stations according to claim 10, is characterized in that, if described LPN community is closed community,,
Described processing unit, also for according to described second channel information, calculate the disturbed condition that different pre-coding matrixes that described the second base station adopts described the first base station pre-stored cause a described UE, and according to described disturbed condition, described different pre-coding matrixes are sorted, obtain pre-coding matrix ordered set Ω;
Described transmitting element, also sends to described the second base station for the described Ω that described processing unit is obtained, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, sends match condition Indication message;
Described receiving element, also for receiving described match condition Indication message;
Described processing unit, when in the indication of described match condition Indication message, the match is successful, according to described the first channel information, calculate the laser propagation effect of described the first base station while adopting described different pre-coding matrixes to transmit a described UE, obtain the best optimum pre-coding matrix of described laser propagation effect, and adopt described optimum pre-coding matrix to carry out transfer of data to a described UE; When described match condition Indication message indication coupling is unsuccessful, abandon carrying out transfer of data to a described UE;
If described LPN community is open community or hybrid community,,
Described transmitting element, also for send described the first channel information and described second channel information to described the second base station, so that described the second base station is judging whether to exist after coupling UE, to described the first base station, send the match condition Indication message that carries optimal joint pre-coding matrix and described coupling UE information;
Described receiving element, also for receiving described match condition Indication message;
Described processing unit, when the match is successful in the indication of described match condition Indication message, adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, corresponding row forms, and to a described UE and described coupling UE, carries out transfer of data; When described match condition Indication message indication coupling is unsuccessful, abandon carrying out transfer of data to a described UE.
12. a kind of second base station, is characterized in that, comprising:
Receiving element, the almost blank subframe ABS pattern sending for receiving the first base station;
Can processing unit, for judging when meeting the service quality QoS demand of user equipment (UE) of its service, configure described ABS pattern;
Described processing unit, for judging can configure described ABS pattern time, configure described ABS pattern, and to described the first base station feedback Indication message, described Indication message indicates described the second base station can configure described ABS pattern, so that described the first base station is left in described the second base station in blank subframe to UE transmission data.
13. the second base stations according to claim 12, is characterized in that,
Described processing unit, also for judging can not configure described ABS pattern time, to described the first base station feedback Indication message, described Indication message indicates described the second base station can not configure described ABS pattern, so that described the first base station by with the cooperating of described the second base station, to described UE transmission data.
14. the second base stations according to claim 12, is characterized in that, if described LPN covers LPN community, are closed community,,
Described receiving element, the pre-coding matrix ordered set Ω also sending for receiving described the first base station;
Described processing unit, specifically for:
Judge whether that existence meets the first pre-conditioned coupling UE and coupling pre-coding matrix, described the first pre-conditioned comprising: when described the second base station adopts and mates pre-coding matrix in described Ω described coupling UE is carried out to transfer of data, not only meet the QoS demand of described coupling UE, and the interference of a described UE is not surpassed to threshold value;
Judging while existing, adopt described coupling pre-coding matrix to described coupling UE transmission data, and described the second base station sends match condition Indication message to described the first base station, the match is successful in described match condition Indication message indication, so that the best optimum pre-coding matrix of laser propagation effect in the different pre-coding matrixes of described the first base station employing pre-stored carries out transfer of data to a described UE;
Judging while not existing, to described the first base station, sending match condition Indication message, described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE;
Or, if described LPN covers LPN community, be open community or hybrid community,,
Described receiving element, also for receiving a described UE of described the first base station transmission and the first channel information between described the first base station, and the second channel information between a described UE and described the second base station;
Described processing unit, specifically for:
According to described the first channel information and described second channel information, judge whether that existence meets the second pre-conditioned coupling UE, described the second pre-conditioned comprising: when data are transmitted to described coupling UE in described the second base station, in the situation that meet the QoS demand of described coupling UE, throughput of system is maximum;
Judging while existing, calculate and obtain a described UE and optimal joint pre-coding matrix corresponding to described coupling UE, and adopt the second pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data; To described the first base station, send the match condition Indication message that carries described optimal joint pre-coding matrix and described coupling UE information, the match is successful in described match condition Indication message indication, so that described the first base station adopts the first pre-coding matrix that in described optimal joint pre-coding matrix, appropriate section forms, to a described UE and described coupling UE, carry out transfer of data;
Judging while not existing, to described the first base station, sending match condition Indication message; Described match condition Indication message indication coupling is unsuccessful, so that described the first base station abandons carrying out transfer of data to a described UE.
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