CN105515731A - Method and device for realizing downward CoMP - Google Patents
Method and device for realizing downward CoMP Download PDFInfo
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- CN105515731A CN105515731A CN201410488134.2A CN201410488134A CN105515731A CN 105515731 A CN105515731 A CN 105515731A CN 201410488134 A CN201410488134 A CN 201410488134A CN 105515731 A CN105515731 A CN 105515731A
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Abstract
The invention discloses a method for realizing downward CoMP, comprising the following steps: first, determining CoMP UE of a local cell and a coordinated cell thereof according to the received signal quality of the local cell and a neighboring cell reported by UE; then, notifying the CoMP UE of the local cell to report the CQI thereof in the local cell and in the coordinated cell, sending the frequency band used by the CoMP UE of the local cell and the CQI of the CoMP UE of the local cell in the coordinated cell to a corresponding coordinated cell, and receiving the frequency band used by CoMP UE of the neighboring cell and the CQI of the CoMP UE of the neighboring cell in the local cell sent by the neighboring cell; and finally, determining a matching user for the CoMP UE of the neighboring cell among center users of the local cell, scheduling the matching user if matching succeeds, or, scheduling the center users of the local cell according to a non-CoMP mode. By implementing the technical scheme disclosed by the invention, the feedback quantity of a downward CS/CB CoMP algorithm is reduced, and the method can be compatible with the existing mechanism of the LTE system to the maximum in the aspects of the feedback mechanism and the X2 interface capacity and is easy to implement.
Description
Technical field
The application relates to wireless communication technology field, particularly a kind of method and device realizing descending CoMP.
Background technology
In LTE system, the throughput of Cell Edge User is well below the throughput of central area user.In order to improve the data rate of Cell Edge User transmission, and improve the throughput of whole system and average throughput efficiency, in the technical discussion process of LTE-Advanced, introduce the point that a kind of utilization separates on geographical position and carry out the collaborative method sending or receive, 3GPP is called collaborative multiple spot technology (CoMP, CoordinatedMulti-PointTransmission/Reception).CoMP be as one improve that high data rate covers, cell edge throughput and (or) instrument that improves throughput of system introduces LTE-A.
CoMP is the technology that a kind of multiple point carries out cooperative transmission/reception, because it can adopt distributed antenna and centralized controlling functions, can carry out arranging net of semi easily.As shown in Figure 1, multiple access point is all connected to same eNodeB, and each access point can comprise one or more bay.For UE, multiple UE can simultaneously and multiple access point carry out the transmission of data, and these access points can belong to same eNodeB or different eNodeB.In the transmitting procedure of data, master controller receives the transmission information of each access point, comprises channel quality, transmitted data rates etc., thus makes scheduling decision, Resources allocation meets the QoS demand of each user, business, and maximizes the throughput performance of whole system.
Generally speaking, descending CoMP refers to that the transfer point of separating in multiple geographical position carries out cooperative transmission, mainly comprises the following two kinds method:
1) Combined Treatment (JointProcessing)
Joint transmission (JointTransmission): multiple transfer point carries out the transmission of PDSCH for same UE simultaneously, can increase the transmission quality of signal or reduce the interference level activated;
(DynamicCellSelection) is selected in dynamic cell: concentrate in CoMP operation, the transmission of PDSCH is carried out in Dynamic Selection community, and synchronization only can transmit You Yige community.
2) cooperative scheduling/wave beam forming (CoordinatedScheduling/Beamforming)
For collaborative figuration technology, only have the Serving cell of terminal to send data to terminal, other communities participating in cooperation can utilize identical wireless resource block for different Terminal Service.Need, according to coordinating the interference of other cell terminals, to reduce the interference to other cell terminals as much as possible when participating in each community transmission signal of collaborative figuration.Wave beam larger for interference ratio, by coordinating the beam direction sending signal, is avoided by minizone effectively, reaches the object reducing interference each other, and therefore, the decision-making of scheduling, beam shaping is that whole communities of being concentrated by CoMP operation are made jointly.
Multipoint cooperative can be divided in base station multipoint cooperative between multipoint cooperative and base station.In base station, multipoint cooperative refers to user in each community by access point (SITE) access network, and multiple access point can be managed by a base station, the application mainly for be multipoint cooperative pattern in base station.
At present, descending cooperative scheduling/collaborative wave beam forming (CS/CB) CoMP algorithm mainly contains the CS/CBCoMP algorithm based on space covariance matrix feedback.This algorithm is a kind of CS/CBCoMP algorithm based on explicit channel status/statistical information feedback.User needs feedback space covariance matrix, base station end is according to the space covariance matrix of feedback, the method calculating peak signal leakage noise ratio (SLNR:SignaltoLeakageandNoiseRatio) is utilized to carry out solving of beam shape-endowing weight value matrix, and then complete CoMP cooperation transmission, improve the performance of edge customer.
Above-mentioned existing method can to realize in CoMP cooperative groups sharing of channel information between community to greatest extent, thus obtain significant performance boost, but, its obvious drawback needs feedack amount excessive, amendment by a relatively large margin is all had to the feedback mechanism of existing LTE system and X2 interface capacity, compatible bad, be unfavorable for realizing.
Summary of the invention
This application provides a kind of method and the device that realize descending CoMP, to reduce the feedback quantity of descending CS/CBCoMP algorithm.
A kind of method realizing descending collaborative multicast communication CoMP that the application provides, comprising:
The received signal quality of steps A, this community reported according to UE and adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Step B, notify that the CoMPUE of this community reports it at the CQI of this community and cooperation cell;
Step C, the frequency range that the CoMPUE of this community is used and send to corresponding cooperation cell at the CQI of cooperation cell, and the frequency range that uses of the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Step D, in the central user of this community for the CoMPUE of described adjacent cell determines to match user, if successful matching, scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
Preferably, described steps A comprises:
Steps A 1, for non-CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of carrying out CoMP, if need to carry out CoMP, is defined as CoMPUE by described UE, and determines the cooperation cell of its correspondence;
Steps A 2, for CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of proceeding CoMP, if do not needed, described UE are defined as non-CoMPUE.
Preferably, described steps A 1 comprises:
Judge whether the RSRP of this community that each non-CoMPUE reports is greater than the first thresholding, if be greater than, the UE of correspondence is judged to be center UE successively, otherwise, the UE of correspondence is judged to be edge UE;
Judge whether this community RSRP of each edge UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if be less than, the UE of correspondence is defined as CoMPUE, and the strongest described adjacent cell is defined as the cooperation cell of described CoMPUE successively.
Preferably, described steps A 2 comprises:
Judge whether the RSRP of this community that each CoMPUE reports is greater than the 3rd thresholding successively, and whether the RSRP of this community of described CoMPUE is greater than the 4th thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, described CoMPUE is defined as non-CoMPUE.
Preferably, described D comprises:
D1, arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
All UE in D2, traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, i is UE index, and N is subcarrier number, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
Preferably, the method comprises further: frequency resource is divided into three frequency ranges, and each community takies a frequency range in three frequency ranges respectively according to the result of Physical Cell Identifier PCImod3, for the CoMPUE in each community.
Present invention also provides a kind of device realizing descending CoMP, comprising: CoMPUE judging module, interactive module and CoMP user matching module, wherein:
Described CoMPUE judging module, for the received signal quality of this community of reporting according to UE and adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Described interactive module, for notifying that the CoMPUE of this community reports it at the CQI of this community and cooperation cell, the frequency range that the CoMPUE of Bing Jiangzhe community uses and send to corresponding cooperation cell at the CQI of cooperation cell, the frequency range also used for the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Described CoMP user matching module, determines to match user for the CoMPUE for described adjacent cell in the central user of this community, if successful matching, and scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
Preferably, described CoMPUE judging module is for performing following operation:
For non-CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of carrying out CoMP, if need to carry out CoMP, is defined as CoMPUE by described UE, and determines the cooperation cell of its correspondence;
For CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of proceeding CoMP, if do not needed, described UE are defined as non-CoMPUE.
Preferably, for non-CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each non-CoMPUE reports is greater than the first thresholding, if be greater than, the UE of correspondence is judged to be center UE successively, otherwise, the UE of correspondence is judged to be edge UE;
Judge whether this community RSRP of each edge UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if be less than, the UE of correspondence is defined as CoMPUE, and the strongest described adjacent cell is defined as the cooperation cell of described CoMPUE successively.
Preferably, for CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each CoMPUE reports is greater than the 3rd thresholding successively, and whether the RSRP of this community of described CoMPUE is greater than the 4th thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, described CoMPUE is defined as non-CoMPUE.
Preferably, described CoMP user matching module is for performing following operation:
Arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
All UE in traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, i is UE index, and N is subcarrier number, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
Preferably, frequency resource is divided into three frequency ranges, and each community takies a frequency range in three frequency ranges respectively according to the result of PCImod3;
Described interactive module, for sending to the cooperation cell of described CoMPUE as the frequency range that CoMPUE uses using the frequency range shared by this community.
As seen from the above technical solution, the application, by determining the CoMPUE in each community, is reported the CQI of this community and cooperation cell by CoMPUE, and by the central user of CoMPUE and cooperation cell being matched, achieves descending CoMP.Compared with existing scheme, technical scheme only needs CoMPUE to feed back the CQI of this community and cooperation cell, this descending CS/CBCoMP algorithm feedback quantity is little, and in feedback mechanism and X2 interface capacity, the compatible to greatest extent current mechanism of LTE system, is beneficial to realization.
Accompanying drawing explanation
Fig. 1 is existing CoMP schematic diagram;
Fig. 2 is the better schematic flow sheet realizing the method for descending CoMP of the application one;
Fig. 3 is that the better CoMPUE of the application one adds schematic flow sheet;
Fig. 4 is that the better CoMPUE of the application one exits schematic flow sheet
Fig. 5 is the application one takies different frequency range respectively according to PCI schematic diagram compared with Jia Ge community;
Fig. 6 is the better composition structural representation realizing the device of descending CoMP of the application one.
Embodiment
For making the object of the application, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the application is described in further detail.
For solving the problem existing for prior art, this application provides a kind of method realizing descending CoMP, as shown in Figure 2, the method comprises the following steps its better flow chart:
Step 201: this community reported according to UE and the received signal quality of adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Step 202: notify that the CoMPUE of this community reports it at the CQI of this community and cooperation cell;
Step 203: the frequency range that the CoMPUE of this community is used and send to corresponding cooperation cell at the CQI of cooperation cell, and the frequency range that uses of the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Step 204: for the CoMPUE of described adjacent cell determines to match user in the central user of this community, if successful matching, scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
Determine in above-mentioned steps 201 that the CoMPUE of this community can be divided into two parts:
The non-CoMPUE of a part becomes the judging process of CoMPUE, this community mainly reported according to UE and the received signal quality of adjacent cell judge that UE is the need of carrying out CoMP, if need to carry out CoMP, then this UE is defined as CoMPUE, and determines the cooperation cell of its correspondence.Specifically, UE and edge UE centered by whether the RSRP information of this community that first can report according to UE is greater than the first thresholding and is divided by UE, then this community reported according to UE and the RSRP information of adjacent cell, judge that edge UE is the need of carrying out CoMP collaboration mode.
Another part is the judging process that CoMPUE becomes center UE, and this community mainly reported according to UE and the received signal quality of adjacent cell judge that UE is the need of proceeding CoMP, if do not needed, this UE are defined as non-CoMPUE.Specifically, whether can be greater than the 3rd thresholding according to the RSRP of CoMPUE Serving cell, and CoMPUE is in the RSRP information of Serving cell and adjacent cell, judges that this CoMP user is the need of returning as non-CoMP pattern.
Below in conjunction with accompanying drawing, describe CoMPUE respectively in detail and add flow process and CoMPUE exits flow process.
Fig. 3 is that the better CoMPUE of the application one adds schematic flow sheet, and this flow process comprises the following steps:
1st step: the Serving cell RSRP information and the adjacent cell RSRP information that read edge UE successively.
2nd step: judge whether the Serving cell RSRP of this UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, that is: judge whether this UE satisfies condition: | RSRP
service-RSRP
neighbor| < Delta_RSRP_Th, if met, then performs the 3rd step, otherwise, return the 1st step.
3rd step: this edge UE is designated CoMPUE, the strongest described adjacent cell is recorded as its cooperation cell, and record its available cooperation frequency range, added CoMPUE list, proceeded to the 4th step.
4th step: judged whether the judgement to all edge UE, if so, proceeds to the 5th step, otherwise proceeds to the 1st step.
5th step: obtain CoMPUE list.
Fig. 4 is that the better CoMPUE of the application one exits schematic flow sheet, and this flow process comprises the following steps:
1st step: the RSRP information obtaining the Serving cell of each CoMPUE successively.
2nd step: judge whether the RSRP of CoMPUE Serving cell is greater than threshold value RSRP_Th, and whether be greater than Delta_RSRP_Th1 with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, proceed to the 3rd step, otherwise proceed to the 1st step.
3rd step: deleted from CoMPUE list by this UE, proceeds to the 4th step.
4th step: judge whether CoMPUE all completes judgement, if so, then proceeds to the 5th step, otherwise proceeds to the 1st step.
5th step: terminate.
Determine in step 204 shown in Fig. 2 that the method for pairing user is:
First, arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
Then, all UE in traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, H
ibe the matrix of 8 × 2, i is UE index, and N is the subcarrier number of UEi, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
In the application, frequency resource is divided into 3 sections, each community, according to the result (PCI:PhysicalCellIdentifier) of PCImod3, takies frequency range 1,2,3 as its edge frequency range for edge customer, as shown in Figure 5 respectively.
Corresponding to said method, present invention also provides a kind of device realizing descending CoMP, its composition structure chart as shown in Figure 6, comprising: CoMPUE judging module, interactive module and CoMP user matching module, wherein:
Described CoMPUE judging module, for the received signal quality of this community of reporting according to UE and adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Described interactive module, for notifying that the CoMPUE of this community reports it at the CQI of this community and cooperation cell, the frequency range that the CoMPUE of Bing Jiangzhe community uses and send to corresponding cooperation cell at the CQI of cooperation cell, the frequency range also used for the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Described CoMP user matching module, determines to match user for the CoMPUE for described adjacent cell in the central user of this community, if successful matching, and scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
Preferably, described CoMPUE judging module is for performing following operation:
For non-CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of carrying out CoMP, if need to carry out CoMP, is defined as CoMPUE by described UE, and determines the cooperation cell of its correspondence;
For CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of proceeding CoMP, if do not needed, described UE are defined as non-CoMPUE.
Preferably, for non-CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each non-CoMPUE reports is greater than the first thresholding, if be greater than, the UE of correspondence is judged to be center UE successively, otherwise, the UE of correspondence is judged to be edge UE;
Judge whether this community RSRP of each edge UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if be less than, the UE of correspondence is defined as CoMPUE, and the strongest described adjacent cell is defined as the cooperation cell of described CoMPUE successively.
Preferably, for CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each CoMPUE reports is greater than the 3rd thresholding successively, and whether the RSRP of this community of described CoMPUE is greater than the 4th thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, described CoMPUE is defined as non-CoMPUE.
Preferably, described CoMP user matching module is for performing following operation:
Arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
All UE in traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, i is UE index, and N is subcarrier number, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
Preferably, frequency resource is divided into three frequency ranges, and each community takies a frequency range in three frequency ranges respectively according to the result of PCImod3; Described interactive module is used for the cooperation cell frequency range shared by this community being sent to described CoMPUE as the frequency range that CoMPUE uses.
The foregoing is only the preferred embodiment of the application, not in order to limit the application, within all spirit in the application and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.
Claims (12)
1. realize a method of descending collaborative multicast communication CoMP, it is characterized in that, comprising:
The received signal quality of steps A, this community reported according to UE and adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Step B, notify that the CoMPUE of this community reports it at the CQI of this community and cooperation cell;
Step C, the frequency range that the CoMPUE of this community is used and send to corresponding cooperation cell at the CQI of cooperation cell, and the frequency range that uses of the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Step D, in the central user of this community for the CoMPUE of described adjacent cell determines to match user, if successful matching, scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
2. method according to claim 1, is characterized in that, described steps A comprises:
Steps A 1, for non-CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of carrying out CoMP, if need to carry out CoMP, is defined as CoMPUE by described UE, and determines the cooperation cell of its correspondence;
Steps A 2, for CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of proceeding CoMP, if do not needed, described UE are defined as non-CoMPUE.
3. method according to claim 2, is characterized in that, described steps A 1 comprises:
Judge whether the RSRP of this community that each non-CoMPUE reports is greater than the first thresholding, if be greater than, the UE of correspondence is judged to be center UE successively, otherwise, the UE of correspondence is judged to be edge UE;
Judge whether this community RSRP of each edge UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if be less than, the UE of correspondence is defined as CoMPUE, and the strongest described adjacent cell is defined as the cooperation cell of described CoMPUE successively.
4. method according to claim 2, is characterized in that, described steps A 2 comprises:
Judge whether the RSRP of this community that each CoMPUE reports is greater than the 3rd thresholding successively, and whether the RSRP of this community of described CoMPUE is greater than the 4th thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, described CoMPUE is defined as non-CoMPUE.
5. method according to claim 1, is characterized in that, described D comprises:
D1, arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
All UE in D2, traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, i is UE index, and N is subcarrier number, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
6. the method according to any one of claim 1 to 5, is characterized in that:
The method comprises further: frequency resource is divided into three frequency ranges, and each community takies a frequency range in three frequency ranges respectively according to the result of Physical Cell Identifier PCImod3, for the CoMPUE in each community.
7. realize a device of descending CoMP, it is characterized in that, comprising: CoMPUE judging module, interactive module and CoMP user matching module, wherein:
Described CoMPUE judging module, for the received signal quality of this community of reporting according to UE and adjacent cell, determines CoMPUE and the cooperation cell thereof of this community; Wherein, CoMPUE is the UE needing to carry out CoMP;
Described interactive module, for notifying that the CoMPUE of this community reports it at the CQI of this community and cooperation cell, the frequency range that the CoMPUE of Bing Jiangzhe community uses and send to corresponding cooperation cell at the CQI of cooperation cell, the frequency range also used for the CoMPUE receiving the described adjacent cell that adjacent cell sends and the CQI in this community;
Described CoMP user matching module, determines to match user for the CoMPUE for described adjacent cell in the central user of this community, if successful matching, and scheduling pairing user, otherwise, according to the central user of non-this community of CoMP mode dispatching.
8. device according to claim 7, is characterized in that, described CoMPUE judging module is for performing following operation:
For non-CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of carrying out CoMP, if need to carry out CoMP, is defined as CoMPUE by described UE, and determines the cooperation cell of its correspondence;
For CoMPUE, this community reported according to UE and the received signal quality of adjacent cell judge that described UE is the need of proceeding CoMP, if do not needed, described UE are defined as non-CoMPUE.
9. device according to claim 8, is characterized in that, for non-CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each non-CoMPUE reports is greater than the first thresholding, if be greater than, the UE of correspondence is judged to be center UE successively, otherwise, the UE of correspondence is judged to be edge UE;
Judge whether this community RSRP of each edge UE is less than the second thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if be less than, the UE of correspondence is defined as CoMPUE, and the strongest described adjacent cell is defined as the cooperation cell of described CoMPUE successively.
10. device according to claim 8, is characterized in that, for CoMPUE, described CoMPUE judging module is for performing following operation:
Judge whether the RSRP of this community that each CoMPUE reports is greater than the 3rd thresholding successively, and whether the RSRP of this community of described CoMPUE is greater than the 4th thresholding with the absolute value of the difference of the RSRP of the strongest adjacent cell, if so, described CoMPUE is defined as non-CoMPUE.
11. methods according to claim 7, is characterized in that, described CoMP user matching module is for performing following operation:
Arrange comprise the set omega of all UE in this community=1,2 ..., M}, is less than the threshold value CQI of setting by CQI
gateuser delete from set omega, obtain
wherein, M is the UE number in this community, and Sq is that CQI is less than CQI
gateuE;
All UE in traversal set omega, the channel orthogonality when CoMPUE calculating itself and described adjacent cell matches: max (‖ H
1-H
2‖
2)=maxtrace ((H
1-H
2)
*(H
1-H
2));
Wherein, H
1and H
2be respectively the channel mean matrix of the CoMPUE of UE and described adjacent cell in described set omega, H
1and H
2by
obtain, i is UE index, and N is subcarrier number, H
ifor the channel estimation value of UEi on subcarrier n; By qualified pairing user s
ldelete from set omega, and add pairing user set
in, obtain
Ω=Ω-{ s
l.
12. devices according to any one of claim 7 to 11, is characterized in that:
Frequency resource is divided into three frequency ranges, and each community takies a frequency range in three frequency ranges respectively according to the result of PCImod3;
Described interactive module, for sending to the cooperation cell of described CoMPUE as the frequency range that CoMPUE uses using the frequency range shared by this community.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488134.2A CN105515731B (en) | 2014-09-23 | 2014-09-23 | A kind of method and device for realizing downlink CoMP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488134.2A CN105515731B (en) | 2014-09-23 | 2014-09-23 | A kind of method and device for realizing downlink CoMP |
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