CN102740301A - Inter cell interference coordination (ICIC) method and apparatus thereof - Google Patents
Inter cell interference coordination (ICIC) method and apparatus thereof Download PDFInfo
- Publication number
- CN102740301A CN102740301A CN2011100911735A CN201110091173A CN102740301A CN 102740301 A CN102740301 A CN 102740301A CN 2011100911735 A CN2011100911735 A CN 2011100911735A CN 201110091173 A CN201110091173 A CN 201110091173A CN 102740301 A CN102740301 A CN 102740301A
- Authority
- CN
- China
- Prior art keywords
- district
- sub
- sir
- interference coordination
- gbr
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses an inter cell interference coordination (ICIC) method and an apparatus thereof. The method comprises the following steps: determining whether all the UE possess GBRs in a cell; if the GBRs are not possessed by all the UE in the cell, acquiring SIRs of all the UE in the cell and determining a Gini coefficient in the cell according to the SIRs of all the UE in the cell; when the Gini coefficient is greater than a preset first threshold, starting a interference coordination function of the cell. In the prior art, dynamic ICIC can not acquire adjacent cell information in time so as to adjust the cell and static interference coordination is only suitable for an occasion with an uniform load so that an interference coordination effect is not ideal. Through a technical scheme provided in the invention, the above problem can be solved and the each cell can achieve a good interference coordination effect under the condition that the load is nonuniform.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of inter-cell interference coordination method and device.
Background technology
The data transfer rate that existing cell mobile communication systems (like the 3G system) provides has very big difference at center of housing estate and cell edge, not only influenced the capacity of whole system, and the service quality that the user is obtained in different positions has very big fluctuation.Therefore, the new generation broadband wireless communication system of researching and developing at present all coincidentally will improve cell-edge performance as one of main demand parameter.Cell edge area particularly, performance receives the influence of presence of intercell interference bigger.Because the mechanism that its physical-layer techniques itself does not have presence of intercell interference to suppress is 1 if adopt frequency duplex factor as one, can cause the interference level of minizone to increase again, the user performance that particularly is positioned at cell edge can receive very big loss.For improving the data rate of cell edge, must effectively alleviate presence of intercell interference.Interference coordination is a kind of effective ways that effectively alleviate presence of intercell interference.
Interference coordination is sometimes referred to as to disturb and avoids, and its method is a lot, but basic principle all is that the up-downgoing resource management is provided with certain restriction, to coordinate the action of a plurality of sub-districts, avoids producing serious presence of intercell interference.This restriction can be the restriction to scheduling of resource, also can be the restriction to transmitting power in certain Resource Block.Can be described as to a certain extent through sacrificing the performance of Cell Center User, improve the performance of Cell Edge User.According to the resource allocation degree of flexibility, the minizone interference coordination technique can be divided into static coordination, dynamic coordinate in TD-HSPA (TimeDivision-High Speed Downlink Packet Access, time division high speed downlink divide into groups to insert) system.
Basic thought is to make presence of intercell interference controlled through managing radio resources, is a kind of many cell radio resources Managed Solution of considering situation such as resource use and load in a plurality of sub-districts and carrying out.Particularly; ICIC (Inter Cell InterferenceCoordination; Inter-Cell Interference Coordination) limits with of the use of minizone coordinated mode Radio Resource in each sub-district; Comprise the use that limits running time-frequency resource or in certain its transmitting power of running time-frequency resource limit etc., to guarantee under the situation that throughput of system does not descend, to improve as far as possible the spectrum efficiency of edge customer.
The static interference tuning algorithm through in time or the scheduling of staggering on the space form strongly disturbing user; Thereby avoided strongly disturbing generation between network; Mainly solve the influence of the strong jamming of minizone to user performance; Strong jamming is in a single day controlled, the performance of edge customer is had by a relatively large margin promote.The design of static interference control algolithm is divided into TIC (Time InterferenceCoordination; The time interference coordination) and SIC (Space Interference Coordination; Spatial interference is coordinated) algorithm, go up and stagger and dispatch the user of neighbor cell in the space from the time respectively.
The practical implementation of static interference tuning algorithm is exactly the scheduling no matter any situation all staggers from time and space, and edge performance is poor when the whole network central user performance is good, and the whole network load is when suitable, the better performances of static interference coordination.Cause some Cell Edge User less when the whole network load is inhomogeneous, perhaps during the whole network poor performance, actually can bring negative effect to system.And the dynamic interference coordination algorithm has been owing to considered the interference characteristic of adjacent sub-district, and its performance is better than static interference and coordinates.But in the TD-HSDPA system, the dynamic interference coordination algorithm need transmit adjacent sub-district relevant information from Iub mouth (interface between radio network controller and the Node B), and the delay of Iub mouth is excessive, causes in existing network, can't realizing.
Summary of the invention
Main purpose of the present invention is to provide a kind of inter-cell interference coordination method and device, to address the above problem.
According to an aspect of the present invention, a kind of inter-cell interference coordination method is provided, has comprised: judged whether all UE have GBR in the sub-district; When not every UE has GBR in the sub-district, obtain the signal-to-jamming ratio SIR of all UE in the sub-district, and confirm the Gini coefficient of sub-district according to the SIR of all UE in the sub-district; When above-mentioned Gini coefficient during, open the interference coordination function of sub-district greater than first thresholding that presets.
Whether all UE have after the GBR in judging the sub-district, also comprise: when UE all in the sub-district has GBR, judge that whether the GBR of central user in the sub-district does not satisfy rate smaller or equal to second thresholding that presets; When center user's GBR does not satisfy rate smaller or equal to second thresholding that presets, judge that whether sub-district inward flange user's GBR does not satisfy rate greater than the 3rd thresholding that presets; When the GBR of edge customer does not satisfy rate greater than the 3rd thresholding that presets, open the interference coordination function of sub-district.
Whether all UE have before the GBR in judging the sub-district, also comprise: according to the preset time slot allocation strategy, for cell configuration interference coordination function is opened time interval resource afterwards.
After the interference coordination function is opened in the sub-district, also comprise: when satisfying predetermined condition, close the interference coordination function of sub-district, wherein, predetermined condition comprise following one of at least: the number of users of sub-district is less than the 4th thresholding that presets; The edge customer number of sub-district is 0; The GBR of the central user of sub-district does not satisfy rate greater than second thresholding that presets; The protection timer expiry of sub-district.
SIR according to all UE in the sub-district confirms that the algorithm of the Gini coefficient of sub-district comprises:
Wherein, N is the number of all UE in the sub-district, when Min≤0, and p
i=(i/N, (Sir
i-Min+1)/Sir
Total), p
I, 1=i/N, p
I, 2=(Sir
i-Min+1)/Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
When Min＞0, p
i=(i/N, Sir
i/ Sir
Total), p
I, 1=i/N, p
I, 2=Sir
i/ Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
According to a further aspect in the invention, a kind of Inter-Cell Interference Coordination device is provided, has comprised: guaranteed judge module, be used to judge whether all user equipment (UE)s all have the bit rate of assurance GBR in the sub-district; Coefficient determination module is used for when not every UE has GBR in the sub-district, obtaining the signal-to-jamming ratio SIR of all UE in the sub-district, and confirms the Geordie Gini coefficient of sub-district according to the SIR of all UE in the sub-district; The function opening module is used for opening the interference coordination function of sub-district when above-mentioned Gini coefficient during greater than first thresholding that presets.
Above-mentioned Inter-Cell Interference Coordination device also comprises: the center judge module, be used for when UE all in the sub-district has GBR, and judge that whether the GBR of central user in the sub-district does not satisfy rate smaller or equal to second thresholding that presets; The edge judge module is used for when center user's GBR does not satisfy rate smaller or equal to second thresholding that presets, judging that whether sub-district inward flange user's GBR does not satisfy rate greater than the 3rd thresholding that presets; The above-mentioned functions opening module also is used for when the GBR of edge customer does not satisfy rate greater than the 3rd thresholding that presets, opening the interference coordination function of sub-district.
Above-mentioned Inter-Cell Interference Coordination device also comprises: the time slot configuration module is used for according to the preset time slot allocation strategy, for cell configuration interference coordination function is opened time interval resource afterwards.
Above-mentioned Inter-Cell Interference Coordination device also comprises: the function closing module is used for after the interference coordination function is opened in the sub-district; When satisfying predetermined condition; Close the interference coordination function of sub-district, wherein, predetermined condition comprise following one of at least: the number of users of sub-district is less than the 4th thresholding that presets; The edge customer number of sub-district is 0; The GBR of the central user of sub-district does not satisfy rate greater than second thresholding that presets; The protection timer expiry of sub-district.
Above-mentioned coefficient determination module confirms that according to the SIR of all UE in the sub-district algorithm of the Geordie Gini coefficient of sub-district comprises:
Through the present invention; Employing is according to all UE (User Equipment in the sub-district; Subscriber equipment) SIR (Signal toInterference Ratio; Signal-to-jamming ratio) Gini of calculation plot (Geordie) coefficient; Characterize the situation of change of interference through the Gini coefficient, open or close the scheme of the interference coordination function of sub-district, thereby solved in the prior art because dynamic I CIC interference coordination can't in time obtain neighboring BS information and adjust this sub-district with decision; And static interference is coordinated only to be applicable to the unfavorable problem of interference coordination effect that the uniform occasion of load is caused, and makes each sub-district under the uneven situation of load, also can obtain interference coordination effect preferably.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the invention;
Fig. 2 is the flow chart of inter-cell interference coordination method according to the preferred embodiment of the invention;
Fig. 3 is the soft time-multiplexed sketch map that relates in the TIC algorithm of the instance according to the present invention;
Fig. 4 is the flow chart of closing the interference coordination function of the instance according to the present invention;
Fig. 5 is the structured flowchart according to the Inter-Cell Interference Coordination device of the embodiment of the invention;
Fig. 6 is the structured flowchart of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the invention.As shown in the figure, comprise according to the inter-cell interference coordination method of the embodiment of the invention:
Step S102 judges whether all UE have GBR (Guaranteed BitRate guarantees bit rate) in the sub-district;
Step S104 when not every UE has GBR in the sub-district, obtains the SIR of all UE in the sub-district, and confirms the Geordie Gini coefficient of sub-district according to the SIR of all UE in the sub-district;
Step S106 is when above-mentioned Gini coefficient (is designated as Thr greater than first thresholding that presets
1) time, open the interference coordination function of sub-district.
In the prior art; So thereby dynamic I CIC interference coordination is adjusted this sub-district because the Iub mouth postpones the excessive neighboring BS information that can't in time obtain; And static interference coordinates only to be applicable to the uniform occasion of load; These defectives can cause in practical application the interference coordination effect undesirable, and are that system brings negative influence.Said method considered synthetically that cell load is inhomogeneous and changed with community user is professional, with good conditionsily opens the interference coordination function, thereby improved the effect of interference coordination to a great extent, is a kind of accurate dynamic interference coordination method.
In said method, to judge at first whether all UE have GBR in the sub-district because different judged results in fact corresponding different processing methods.When not every UE has GBR, just need further obtain the SIR of all UE, and finally confirm the Gini coefficient of sub-district according to these SIR.The application here of Gini coefficient is in order to characterize the gap of all UE performances in the sub-district; When the Gini coefficient is big, just explain that the performance gap between the UE is bigger in the sub-district; At this moment just need open the interference coordination function to dwindle this gap; Hour just explain that the performance gap between the UE is less in the sub-district when the Gini coefficient, at this moment just need not open the interference coordination function.Therefore just can set a thresholding (being the first above-mentioned thresholding), as the foundation of opening the interference coordination function, when Gini coefficient during greater than this thresholding; Then open the interference coordination function; When Gini coefficient during, then do not open the interference coordination function, directly process ends smaller or equal to this thresholding.The value of this thresholding can be set according to concrete needs, and the value of this thresholding is different for different systems, and can be optimized through emulation, has an optimal value.
Preferably, as shown in Figure 2, whether all UE have after the GBR in judging the sub-district, can further include:
Step S212 when UE all in the sub-district has GBR, judges that the GBR of central user does not satisfy rate in the sub-district (to be designated as NSR
C) whether (be designated as Thr smaller or equal to second thresholding that presets
2);
Step S214, when center user's GBR did not satisfy rate smaller or equal to second thresholding that presets, the GBR that judges sub-district inward flange user did not satisfy rate and (is designated as NSR
Edge) whether (be designated as Thr greater than the 3rd thresholding that presets
3);
Step S216 when the GBR of edge customer does not satisfy rate greater than the 3rd thresholding that presets, opens the interference coordination function of sub-district.
When UE all in the sub-district had GBR, the subsequent treatment when not every UE has GBR in its subsequent treatment and the sub-district was distinct.When UE all in the sub-district has GBR; Just need further to judge whether the GBR of central user does not satisfy rate smaller or equal to second thresholding that presets, and judges promptly whether the performance of central user is enough good, because to some degree; Interference coordination is through sacrificing the performance of Cell Center User; Improve the performance of Cell Edge User, when center user GBR can not get guaranteeing, it is nonsensical doing interference coordination.When center user's performance is enough good; Whether the GBR that just can further judge edge customer does not satisfy rate greater than the 3rd thresholding that presets, and promptly whether the performance of edge customer is enough poor, because significantly; When having only user's on the edge of poor-performing, do interference coordination and be only significant.When above-mentioned condition has one not satisfy, just there is no need to have opened the interference coordination function, flow process just can be through with.Need to prove that for different systems, the second above-mentioned thresholding, the value of the 3rd thresholding also are different, and the value of these two thresholdings can be optimized also through emulation, have an optimal value.
Here can see; According in the sub-district whether all UE all have result's the difference of the judgement of GBR, follow-up processing just divides for two kinds, and is as shown in Figure 2; Wherein, step S206-step S210 and step S216 just are equivalent to above-mentioned step S102-step S106.
Preferably, as shown in Figure 2, whether all UE have before the GBR in judging the sub-district, can further include:
Step S202, the configuration time interval resource is promptly according to the preset time slot allocation strategy, for cell configuration interference coordination function is opened time interval resource afterwards.
Above-mentioned steps adopts the TIC algorithm after mainly opening the interference coordination function to the sub-district; When system is in initial condition; Each base station can be according to the preset time slot allocation strategy; Open time interval resource afterwards for each cell configuration interference coordination function, above-mentioned time slot allocation strategy only uses when this coordinating district interference function is opened.After the sub-district got into ICIC, there was its fixing special TTI each sub-district, when special TTI arrives, and the priority scheduling edge customer, and improve transmitting power.Non-special TTI is not then dispatched edge customer, the user of control centre, and reduce the central user transmitting power.
Generally speaking (can with reference to figure 2), above-mentioned preferred embodiment can may further comprise the steps:
1, when system is in initial condition, each base station is according to the preset time slot allocation strategy, for each cell configuration interference coordination function is opened time interval resource afterwards;
2, when all UE in the sub-district have GBR to guarantee, change step 3 over to, when not all UE in the sub-district has GBR to guarantee, then change step 4 over to;
3, do not get into interference coordination when center user GBR does not satisfy rate greater than second thresholding, when center user GBR does not satisfy rate smaller or equal to second thresholding, change step 5 over to;
4, the SIR of all UE in the calculation plot utilizes the SIR of all UE in the sub-district to calculate the Gini coefficient of this sub-district.This Gini coefficient and first thresholding relatively, when Gini coefficient during, open the interference coordination function of sub-district, otherwise do not open the interference coordination function of sub-district greater than first thresholding;
5, edge customer GBR does not satisfy rate and then opens the interference coordination function of sub-district greater than the 3rd thresholding, otherwise, do not open the interference coordination function.
Preferably, after the interference coordination function is opened in the sub-district, can further include:
When satisfying predetermined condition, close the interference coordination function of sub-district, wherein, above-mentioned predetermined condition can comprise following one of at least: the number of users of sub-district (is designated as Thr less than the 4th thresholding that presets
4); The edge customer number of sub-district is 0; The GBR of the central user of sub-district does not satisfy rate greater than above-mentioned second thresholding that presets; The protection timer expiry of sub-district.
In the practical implementation process, after the interference coordination function is opened, when satisfying some condition; Just there is no need to have proceeded interference coordination again, for example, the number of users of sub-district is less than the 4th thresholding that presets; Be that user in the sub-district is less; Because the user is less,, therefore just interference coordination need not have been proceeded so each user's performance will improve naturally; The edge customer number of sub-district is 0, when not having edge customer in the sub-district, also just has been far from being interference coordination naturally; The GBR of the central user of sub-district does not satisfy rate greater than above-mentioned second thresholding that presets, and when center user's performance can not ensure, it is just nonsensical to carry out interference coordination again; The protection timer expiry of sub-district, when the sub-district had the protection timer, under the situation of protection timer expiry, interference coordination had just stopped naturally.Need to prove that the condition of closing the coordinating district interference function is not limited to above-mentioned 4 kinds, can expand as the case may be.
Preferably, the SIR according to all UE in the sub-district confirms that the algorithm of the Geordie Gini coefficient of this sub-district comprises:
N is the number of all UE in the sub-district, when Min≤0, and p
i=(i/N, (Sir
i-Min+1)/Sir
Total), p
I, 1=i/N, p
I, 2=(Sir
i-Min+1)/Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
When Min＞0, p
i=(i/N, Sir
i/ Sir
Total), p
I, 1=i/N, p
I, 2=Sir
i/ Sit
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
Above-mentioned algorithm can be divided into two steps to be accomplished:
Step 1: the SIR that establishes UE is respectively Sir
1, Sir
2..., Sir
N, Min=min (Sir is arranged
1, Sir
2..., Sir
N), if Min≤0 then has
p
i=(i/N, (Sir
1-Min+1)/Sir
Total), if Min＞0 then has
p
i=(i/N, Sir
i/ Sir
Total);
Step 2: in the length of side is 1 square, by little to following N point: the p that draws greatly
1, p
2..., p
N, connect this N point, again with initial point p
0=(0,0) couples together; The diagonal in the foursquare lower left corner and the upper right corner that draws, the curve that this diagonal and above-mentioned N point connect into constitutes a closed interval, and this interval area is S
TotalGini=S
Total/ (1/2), wherein 1/2 area, i.e. Gini=2*S for following triangle
Total, Gini coefficient is 1 to the maximum, and minimum is 0, and concrete calculation procedure is following:
The B value that above-mentioned formula calculates is the area that calculated curve below and X axle surround the zone.Because this zone is by several trapezoidal compositions, summation symbol the inside is the formula of trapezoidal area.
Therefore, Gini=2*S
Total=2* (1/2-B)=1-2B.
Below in conjunction with instance above-mentioned preferred embodiment is elaborated, whole instance may further comprise the steps:
Step 1, initialization.What initialization was mainly carried out is that each base station is according to the preset time slot allocation strategy; For each cell configuration interference coordination function is opened time interval resource afterwards; Above-mentioned time slot allocation strategy mainly refers to the time slot allocation that relates in the TIC algorithm, and this time slot allocation strategy only uses when this coordinating district interference function is opened.
TIC algorithm design thought is to be one section special TTI of each cell setting (Transmission Time Tnterval; Transmission Time Interval); The configuration of staggering of the special TTI of neighbor cell, each NodeB (Node B) side improves the priority of edge customer in special TTI, reaches neighbor cell with this and staggers and dispatch the purpose of edge customer; And the adjacent area reduces the transmitting power of dispatched users at the moment, to reduce the interference to the current area edge customer.
The main points of this algorithm were to the special time period of each cell configuration, and are promptly soft time-multiplexed.A kind of simple configuration method be 1: 3 multiplexing, as shown in Figure 4, T
sBe special TTI length, default configuration 100 sub-frame length.Three sub-district number consecutivelies to each base stations control are 1,2,3, as special scheduling slot numbering.As shown in Figure 4, the special TTI section of different shadings is distributed to the sub-district of corresponding shading.
Step 2, for carrying out margin and center user judgement (with reference to step S204 among the figure 2), the foundation of judgement is the SNPL (Serving and Neighbor Cell Path Loss, Serving cell and neighbor cell path loss) of UE here.As SNPL during, then think edge customer, otherwise think central user less than a thresholding.The recommendation of thresholding is 2dB.Certainly, under the situation that user and central user have been confirmed on the edge of, this step has not just needed.
Step 3 judges whether all UE have GBR in this sub-district, if execution in step 4, if fruit is not, execution in step 6.
Step 4; When the business that is passed as this sub-district UE has GBR to guarantee, judge the performance of Cell Center User, because to some degree; Interference coordination is through sacrificing the performance of Cell Center User; Improve the performance of Cell Edge User, when center user GBR can not get guaranteeing, it was nonsensical doing interference coordination.Have only central user GBR not satisfy rate smaller or equal to a thresholding (Thr
2) time execution in step 5, otherwise the interference coordination function is not opened in the sub-district.
Step 5 is judged the performance of edge customer, when edge customer GBR does not satisfy greater than a thresholding (Thr
3) time, just open the interference coordination function of sub-district.
When step 6, the business that is passed as this sub-district UE do not have GBR to guarantee, then calculate the Gini coefficient judging the gap of all UE performances of sub-district, when the performance gap of all UE greater than a thresholding (Thr
1) time, the interference coordination function is opened in the sub-district, otherwise does not open.
Thresholding (the Thr that here relates to
1, Thr
2, Thr
3), its concrete value need be optimized through emulation, has an optimal value.
The escape mechanism of ICIC (promptly closing the flow process of interference coordination function) is as shown in Figure 4, has several kinds of situation can withdraw from ICIC.When the community user number less than a thresholding (Thr
4) time, perhaps, current area does not exist edge UE then to withdraw from ICIC.Because ICIC sacrifices the central user performance to improve marginal user performance, thus when the center user performance after ICIC opens, it is more to descend, when center user's GBR does not satisfy rate greater than a thresholding (Thr
2), then must consider to withdraw from ICIC, refer step S404.For fear of the sub-district ICIC open withdraw from ICIC before table tennis switch, each cell setting a protection timer, refer step 406, when the sub-district is in non-ICIC state, the timer zero clearing, when the sub-district was in the ICIC state, timer was started working.After execution in step 404, if should protect timer expiry, then ICIC is withdrawed from this sub-district, otherwise does not withdraw from.
Equally, here, the thresholding (Thr that mentions
2, Thr
4) with the protection timer time limit, its concrete value need be optimized through emulation, has an optimal value.
Simulating, verifying proves that through above-mentioned flow process, under the uniform situation of each cell load, this scheme is suitable with static ICIC, and under the inhomogeneous situation of each cell load, this programme has the gain of 10%-25% than static ICIC scheme.
Fig. 5 is the structured flowchart according to the Inter-Cell Interference Coordination device of the embodiment of the invention.As shown in Figure 5, comprise according to the Inter-Cell Interference Coordination device of the embodiment of the invention:
Coefficient determination module 506 links to each other with guaranteeing judge module 504, and is used for when not every UE has GBR in the sub-district, obtaining the SIR of all UE in the sub-district, and confirms the Geordie Gini coefficient of sub-district according to the SIR of all UE in the sub-district;
Function opening module 508 links to each other with coefficient determination module 506, is used for opening the interference coordination function of sub-district when Gini coefficient during greater than first thresholding that presets.
Said apparatus has been used a kind of accurate dynamic interference coordination scheme, has considered synthetically that cell load is inhomogeneous to change with community user is professional that the interference coordination function of opening with good conditionsi has improved the effect of interference coordination to a great extent.
In said apparatus, guarantee judge module 504 is mainly used in judge whether all UE have GBR in the sub-district because different judged results in fact correspondence different processing methods.When not every UE had GBR, coefficient determination module 506 just need further be obtained the SIR of all UE, and finally confirmed the Gini coefficient of sub-district according to these SIR.The application here of Gini coefficient is in order to characterize the gap of all UE performances in the sub-district; When the Gini coefficient is big, just explain that the performance gap between the UE is bigger in the sub-district; At this moment just need open the interference coordination function to dwindle this gap; Hour just explain that the performance gap between the UE is less in the sub-district when the Gini coefficient, at this moment just need not open the interference coordination function.Therefore just can set a thresholding (being the first above-mentioned thresholding); As the foundation of opening the interference coordination function; When Gini coefficient during greater than this thresholding; Function opening module 508 is just opened the interference coordination function, when Gini coefficient during smaller or equal to this thresholding, does not then open the direct process ends of interference coordination function.The value of this thresholding can be set according to concrete needs, and the value of this thresholding can be optimized through emulation for different systems, has an optimal value.
Preferably, as shown in Figure 6, can further include according to the Inter-Cell Interference Coordination device of the embodiment of the invention:
Above-mentioned functions opening module 508 also links to each other with edge judge module 512, also is used for when the GBR of edge customer does not satisfy rate greater than the 3rd thresholding that presets, opening the interference coordination function of sub-district.
When UE all in the sub-district had GBR, the subsequent treatment when not every UE has GBR in its subsequent treatment and the sub-district was distinct.When UE all in the sub-district has GBR; Center judge module 510 just needs further to judge whether the GBR of central user does not satisfy rate smaller or equal to second thresholding that presets, and judges promptly whether the performance of central user is enough good, because to some degree; Interference coordination is through sacrificing the performance of Cell Center User; Improve the performance of Cell Edge User, when center user GBR can not get guaranteeing, it is nonsensical doing interference coordination.When center user's performance is enough good; Edge judge module 512 just can judge further that whether the GBR of edge customer does not satisfy rate greater than the 3rd thresholding that presets; Whether the performance that is edge customer is enough poor; Because significantly, when having only user's on the edge of poor-performing, do interference coordination and be only significant.When above-mentioned condition has one not satisfy, just there is no need to have opened the interference coordination function.Need to prove that for different systems, the second above-mentioned thresholding, the value of the 3rd thresholding are different, and the value of these two thresholdings can be optimized also through emulation, have an optimal value.
Preferably, as shown in Figure 6, can further include according to the Inter-Cell Interference Coordination device of the embodiment of the invention:
Time slot configuration module 502 links to each other with assurance judge module 504, is used for according to the preset time slot allocation strategy, for cell configuration interference coordination function is opened time interval resource afterwards.
Time slot configuration module 502 can adopt the device of TIC algorithm to establish after mainly opening the interference coordination function to the sub-district; When system is in initial condition; Time slot configuration module 502 can be opened the above-mentioned time slot allocation strategy of time interval resource afterwards for each cell configuration interference coordination function and only when this coordinating district interference function is opened, use according to the preset time slot allocation strategy.After the sub-district got into ICIC, there was its fixing special TTI each sub-district, when special TTI arrives, and the priority scheduling edge customer, and improve transmitting power.Non-special TTI is not then dispatched edge customer, the user of control centre, and reduce the central user transmitting power.
Preferably, as shown in Figure 6, can further include according to the Inter-Cell Interference Coordination device of the embodiment of the invention:
Function closing module 514; Link to each other with function opening module 508; Be used for after the interference coordination function is opened in the sub-district, when satisfying predetermined condition, close the interference coordination function of sub-district; Wherein, above-mentioned predetermined condition can comprise following one of at least: the number of users of sub-district is less than the 4th thresholding that presets; The edge customer number of sub-district is 0; The GBR of the central user of sub-district does not satisfy rate greater than above-mentioned second thresholding that presets; The protection timer expiry of sub-district.
In the practical implementation process, after the interference coordination function is opened, when satisfying some condition; Just there is no need to have proceeded interference coordination again, function closing module 514 will be closed the interference coordination function, for example; The number of users of sub-district is less than the 4th thresholding that presets, and promptly the user in the sub-district is less, because the user is less; So each user's performance will improve naturally, therefore just interference coordination need not have been proceeded; The edge customer number of sub-district is 0, when not having edge customer in the sub-district, also just has been far from being interference coordination naturally; The GBR of the central user of sub-district does not satisfy rate greater than above-mentioned second thresholding that presets, and when center user's performance can not ensure, it is just nonsensical to carry out interference coordination again; The protection timer expiry of sub-district, when the sub-district had the protection timer, under the situation of protection timer expiry, interference coordination had just stopped naturally.Need to prove that the condition of closing the interference coordination function of sub-district is not limited to above-mentioned 4 kinds, can expand as the case may be.
Preferably, coefficient determination module 506 confirms that according to the SIR of all UE in the sub-district algorithm of the Gini coefficient of this sub-district comprises:
N is the number of all UE in the sub-district, when Min≤0, and p
i=(i/N, (Sir
i-Min+1)/Sir
Total), p
I, 1=i/N, p
I, 2=(Sir
i-Min+1)/Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
When Min＞0, p
i=(i/N, Sir
i/ Sir
Total), p
I, 1=i/N, p
I, 2=Sir
i/ Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the sub-district,
Coefficient determination module 506 is carried out the process of above-mentioned algorithm, and existing hereinbefore detailed description the in detail repeated no more here.
From above description, can find out that technical scheme provided by the invention is through measuring some key parameters of this sub-district; Characterize the situation of change of interference through these parameters; When marginal user performance worsens, then open the interference coordination function of sub-district, the interference environment when this sub-district improves; Then close the interference coordination function of sub-district, proposed a kind ofly can take all factors into consideration the inhomogeneous interference coordination technique with the professional situation of change of community user of cell load.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an inter-cell interference coordination method is characterized in that, comprising:
Judge whether all user equipment (UE)s all have the bit rate of assurance GBR in the sub-district;
When not every UE has GBR in the said sub-district, obtain the signal-to-jamming ratio SIR of all UE in the said sub-district, confirm the Geordie Gini coefficient of said sub-district according to the SIR of all UE in the said sub-district;
When said Gini coefficient during, open the interference coordination function of said sub-district greater than first thresholding that presets.
2. method according to claim 1 is characterized in that, after all UE have GBR in judging said sub-district, also comprises:
When UE all in the said sub-district has GBR, judge that whether the GBR of central user in the said sub-district does not satisfy rate smaller or equal to second thresholding that presets;
When the GBR of said central user does not satisfy rate smaller or equal to said second thresholding that presets, judge that whether said sub-district inward flange user's GBR does not satisfy rate greater than the 3rd thresholding that presets;
When the GBR of said edge customer does not satisfy rate greater than said the 3rd thresholding that presets, open the interference coordination function of said sub-district.
3. method according to claim 2 is characterized in that, before all UE have GBR in judging said sub-district, also comprises:
According to the preset time slot allocation strategy, for said cell configuration interference coordination function is opened time interval resource afterwards.
4. method according to claim 3 is characterized in that, after the interference coordination function is opened in said sub-district, also comprises:
When satisfying predetermined condition, close the interference coordination function of said sub-district, wherein, said predetermined condition comprise following one of at least:
The number of users of said sub-district is less than the 4th thresholding that presets;
The edge customer number of said sub-district is 0;
The GBR of the central user of said sub-district does not satisfy rate greater than said second thresholding that presets;
The protection timer expiry of said sub-district.
5. according to each described method of claim 1-4, it is characterized in that, confirm that according to the SIR of all UE in the said sub-district algorithm of the Geordie Gini coefficient of said sub-district comprises:
N is the number of all UE in the said sub-district, when Min≤0, and p
i=(i/N, (Sir
i-Min+1)/Sir
Total), p
I, 1=i/N, p
I, 2=(Sir
i-Min+1)/Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the said sub-district,
When Min＞0, p
i=(i/N, Sir
i/ Sir
Total), p
I, 1=i/N, p
I, 2=Sir
i/ Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
2, Sir
2..., Sir
NBe the sir value of all UE in the said sub-district,
6. an Inter-Cell Interference Coordination device is characterized in that, comprising:
Guarantee judge module, be used to judge whether all user equipment (UE)s all have the bit rate of assurance GBR in the sub-district;
Coefficient determination module is used for when not every UE has GBR in the said sub-district, obtaining the signal-to-jamming ratio SIR of all UE in the said sub-district, confirms the Geordie Gini coefficient of said sub-district according to the SIR of all UE in the said sub-district;
The function opening module is used for opening the interference coordination function of said sub-district when said Gini coefficient during greater than first thresholding that presets.
7. device according to claim 6 is characterized in that, also comprises:
The center judge module is used for when UE all in the said sub-district has GBR, judges that whether the GBR of central user in the said sub-district does not satisfy rate smaller or equal to second thresholding that presets;
The edge judge module is used for when the GBR of said central user does not satisfy rate smaller or equal to said second thresholding that presets, judging that whether said sub-district inward flange user's GBR does not satisfy rate greater than the 3rd thresholding that presets;
Said function opening module also is used for when the GBR of said edge customer does not satisfy rate greater than said the 3rd thresholding that presets, opening the interference coordination function of said sub-district.
8. device according to claim 7 is characterized in that, also comprises:
The time slot configuration module is used for according to the preset time slot allocation strategy, for said cell configuration interference coordination function is opened time interval resource afterwards.
9. device according to claim 8 is characterized in that, also comprises:
The function closing module is used for after the interference coordination function is opened in said sub-district, when satisfying predetermined condition, closes the interference coordination function of said sub-district, wherein, said predetermined condition comprise following one of at least:
The number of users of said sub-district is less than the 4th thresholding that presets;
The edge customer number of said sub-district is 0;
The GBR of the central user of said sub-district does not satisfy rate greater than said second thresholding that presets;
The protection timer expiry of said sub-district.
10. according to each described device of claim 6-9, it is characterized in that said coefficient determination module confirms that according to the SIR of all UE in the said sub-district algorithm of the Geordie Gini coefficient of said sub-district comprises:
N is the number of all UE in the said sub-district, when Min≤0, and p
i=(i/N, (Sir
i-Min+1)/Sir
Total), p
I-1=i/N, p
I, 2=(Sir
i-Min+1)/Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the said sub-district,
When Min＞0, p
i=(i/N, Sir
i/ sir
Total), p
I, 1=i/N, p
I, 2=Sir
i/ Sir
Total, wherein, Min=min (Sir
1, Sir
2..., Sir
N), Sir
1, Sir
2..., Sir
NBe the sir value of all UE in the said sub-district,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091173.5A CN102740301B (en) | 2011-04-12 | 2011-04-12 | Inter cell interference coordination (ICIC) method and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091173.5A CN102740301B (en) | 2011-04-12 | 2011-04-12 | Inter cell interference coordination (ICIC) method and apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102740301A true CN102740301A (en) | 2012-10-17 |
| CN102740301B CN102740301B (en) | 2015-01-28 |
Family
ID=46994901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110091173.5A Active CN102740301B (en) | 2011-04-12 | 2011-04-12 | Inter cell interference coordination (ICIC) method and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102740301B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106488574A (en) * | 2015-08-31 | 2017-03-08 | 上海摩波彼克半导体有限公司 | A kind of data transmission scheduling method and mobile terminal |
| CN110267283A (en) * | 2019-06-26 | 2019-09-20 | 武汉虹信通信技术有限责任公司 | Adjacent area Synergistic method and device |
| CN110335385A (en) * | 2019-06-18 | 2019-10-15 | 广东汇泰龙科技股份有限公司 | A kind of method for realizing low power consumption and system of intelligent door lock |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080107030A1 (en) * | 2006-11-03 | 2008-05-08 | Samsung Electronics Co., Ltd. | Apparatus and method for controlling data transfer rate on reverse link in mobile communication system |
| US20090196193A1 (en) * | 2006-06-12 | 2009-08-06 | Pal Frenger | Method in a scheduler for reducing inter-cell interference |
| CN101697622A (en) * | 2009-11-03 | 2010-04-21 | 天津理工大学 | Methods for eliminating intra-cell interference and inter-cell interference in TD-SCDMA system |
| CN101777956A (en) * | 2009-01-14 | 2010-07-14 | 普天信息技术研究院有限公司 | Method for coordinating semi-static interference |
-
2011
- 2011-04-12 CN CN201110091173.5A patent/CN102740301B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090196193A1 (en) * | 2006-06-12 | 2009-08-06 | Pal Frenger | Method in a scheduler for reducing inter-cell interference |
| US20080107030A1 (en) * | 2006-11-03 | 2008-05-08 | Samsung Electronics Co., Ltd. | Apparatus and method for controlling data transfer rate on reverse link in mobile communication system |
| CN101777956A (en) * | 2009-01-14 | 2010-07-14 | 普天信息技术研究院有限公司 | Method for coordinating semi-static interference |
| CN101697622A (en) * | 2009-11-03 | 2010-04-21 | 天津理工大学 | Methods for eliminating intra-cell interference and inter-cell interference in TD-SCDMA system |
Non-Patent Citations (2)
| Title |
|---|
| 张瑞，宋荣芳: "基于协作多点的干扰协调技术", 《南京邮电大学学报》 * |
| 郑侃: "宽带0FDM系统的干扰协调技术", 《现代电信科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106488574A (en) * | 2015-08-31 | 2017-03-08 | 上海摩波彼克半导体有限公司 | A kind of data transmission scheduling method and mobile terminal |
| CN110335385A (en) * | 2019-06-18 | 2019-10-15 | 广东汇泰龙科技股份有限公司 | A kind of method for realizing low power consumption and system of intelligent door lock |
| CN110267283A (en) * | 2019-06-26 | 2019-09-20 | 武汉虹信通信技术有限责任公司 | Adjacent area Synergistic method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102740301B (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6175522B2 (en) | System and method for interference reduction in heterogeneous networks | |
| EP2663111B1 (en) | Capacity and coverage self-optimization method and device in mobile network | |
| RU2503142C2 (en) | Communication terminal device, base station device and radio communication system | |
| Zhang et al. | Inter-cell interference coordination based on softer frequency reuse in OFDMA cellular systems | |
| Weber et al. | Scheduling strategies for HetNets using eICIC | |
| CN102036249B (en) | Inter-cell interference coordination method and base station | |
| EP2374296B1 (en) | A method op dimensioning radio access networks, corresponding system and computer program product | |
| CN102056178A (en) | Interference coordination method among cells and evolved NodeB (eNB) | |
| Nasreddine et al. | Time slot allocation based on a path gain division scheme for TD-CDMA TDD systems | |
| Celik et al. | On the feasibility of blind dynamic TDD in ultra-dense wireless networks | |
| CN102740301B (en) | Inter cell interference coordination (ICIC) method and apparatus thereof | |
| Chen et al. | A closed-loop UL power control scheme for interference mitigation in dynamic TD-LTE systems | |
| Nakano et al. | Downlink power allocation with CSI overhearing in an OFDMA macrocell/femtocell coexisting system | |
| Huang et al. | A downlink ICIC method based on region in the LTE-Advanced system | |
| Iskandar et al. | Inter-cell interference management technique for multi-cell lte-a network | |
| Tsolkas et al. | Alleviating control channel interference in femto-overlaid LTE-advanced networks | |
| Nakano et al. | Interference mitigation based on partial CSI feedback and overhearing in an OFDMA heterogeneous system | |
| Hamouda et al. | A game theoretic power control scheme for femtocells under macro-user QoS constraint | |
| Michel et al. | Performance evaluation of the eICIC technique applied to a heterogeneous 4G mobile network | |
| Lee et al. | Dual layer small cell On/Off control for ultra-dense small cell networks | |
| CN104202807A (en) | Method and system for controlling uplink power | |
| Ting et al. | Downlink co-tier interference mitigation for femtocell networks | |
| Sun et al. | Coverage analysis for ultra-dense networks with dynamic TDD | |
| CN102726084B (en) | Frequency reuse method and device | |
| Yin et al. | Fundamental EE tradeoff in LTE-U based small cell systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200818 Address after: 210012 Nanjing, Yuhuatai District, South Street, Bauhinia Road, No. 68 Patentee after: Nanjing Zhongxing New Software Co.,Ltd. Address before: 518057 Nanshan District science and technology, Guangdong Province, South Road, No. 55, No. Patentee before: ZTE Corp. |