CN102740301B - Inter cell interference coordination (ICIC) method and apparatus thereof - Google Patents

Inter cell interference coordination (ICIC) method and apparatus thereof Download PDF

Info

Publication number
CN102740301B
CN102740301B CN201110091173.5A CN201110091173A CN102740301B CN 102740301 B CN102740301 B CN 102740301B CN 201110091173 A CN201110091173 A CN 201110091173A CN 102740301 B CN102740301 B CN 102740301B
Authority
CN
China
Prior art keywords
sir
community
interference coordination
described community
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.)
Active
Application number
CN201110091173.5A
Other languages
Chinese (zh)
Other versions
CN102740301A (en
Inventor
吴友
芮华
李兰兰
陈海生
胡啸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Zhongxing Software Co Ltd
Original Assignee
ZTE Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to CN201110091173.5A priority Critical patent/CN102740301B/en
Publication of CN102740301A publication Critical patent/CN102740301A/en
Application granted granted Critical
Publication of CN102740301B publication Critical patent/CN102740301B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Inter-cell interference coordination method and device
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 heart and cell edge have very large difference to the data transfer rate that existing cell mobile communication systems (as 3G system) provides in the cell, not only have impact on the capacity of whole system, and make user have very large fluctuation in the service quality that different positions obtains.Therefore, the new generation broadband wireless communication system researched and developed at present, all coincidentally will improve cell-edge performance as one of main demand parameter.Particularly cell edge area, performance is larger by the impact of presence of intercell interference.Again due to the mechanism that its physical-layer techniques itself does not have presence of intercell interference to suppress, if adopt frequency duplex factor as one to be 1, the interference level of minizone can be caused to increase, and the user performance being particularly positioned at cell edge can be subject to extreme loss.For improving the data rate of cell edge, effectively presence of intercell interference must be alleviated.Interference coordination is a kind of effective ways effectively alleviating presence of intercell interference.
Interference coordination is sometimes referred to as interference and avoids, and its method is a lot, but general principle is all arrange certain restriction to up-downgoing resource management, to coordinate the action of multiple community, 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 the performance by sacrificing Cell Center User to a certain extent, improving the performance of Cell Edge User.According to resource allocation degree of flexibility, between TD-HSPA (TimeDivision-High Speed Downlink Packet Access, time division high speed downlink grouping access) system small area, interference coordination technique can be divided into static coordination, dynamic coordinate.
Basic thought by managing radio resources, presence of intercell interference is controlled, and is a kind ofly to consider that resource in multiple community uses and the situation such as load and the multiple cell radio resource management scenarios of carrying out.Specifically, ICIC (Inter Cell InterferenceCoordination, Inter-Cell Interference Coordination) in the mode of inter-cell coordination, the use of Radio Resource in each community is limited, comprise the use of restriction running time-frequency resource or on certain running time-frequency resource, limit its transmitting power etc., to ensure the spectrum efficiency improving edge customer when throughput of system does not decline as far as possible.
Static interference coordination algorithm forms strongly disturbing user by scheduling of staggering in time or spatially, thus avoid strongly disturbing generation between network, mainly solve the impact of strong jamming on user performance of minizone, strong jamming is once be controlled, and the performance of edge user has and promotes by a relatively large margin.Static interference control algorithm design is divided into TIC (Time InterferenceCoordination, time interference coordination) and SIC (Space Interference Coordination, space interference coordination) algorithm, the user of scheduling neighbor cell of from the time and spatially staggering respectively.
Static interference coordination algorithm specifically implement be exactly no matter any situation all to stagger scheduling from Time and place, when the whole network central user performance is good, edge performance is poor, and when the whole network load is suitable, the better performances of static interference coordination.Cause some Cell Edge User less when the whole network load is uneven, or during the whole network poor performance, actual meeting bring negative effect to system.And dynamic interference coordination algorithm is owing to considering the interference characteristic of adjacent cell, its performance is better than static interference coordination.But in TD-HSDPA system, dynamic interference coordination algorithm needs to transmit adjacent cell relevant information from Iub mouth (interface between radio network controller and Node B), and Iub mouth postpones excessive, causes cannot realizing in existing network.
Summary of the invention
Main purpose of the present invention is to provide a kind of inter-cell interference coordination method and device, to solve the problem.
According to an aspect of the present invention, provide a kind of inter-cell interference coordination method, comprising: judge in community, whether all UE have GBR; When not every UE has GBR in community, obtain the signal-to-jamming ratio SIR of all UE in community, and determine the Gini coefficient of community according to the SIR of UE all in community; When above-mentioned Gini coefficient is greater than the first preset thresholding, open the interference coordination function of community.
After judging in community that whether all UE have GBR, also comprise: when UE all in community has GBR, whether the GBR judging central user in community not Service Efficiency is less than or equal to the second preset thresholding; When Service Efficiency is not less than or equal to the second preset thresholding to the GBR of central user, whether the GBR judging community inward flange user not Service Efficiency is greater than the 3rd preset thresholding; When Service Efficiency is not greater than the 3rd preset thresholding to the GBR of edge customer, open the interference coordination function of community.
Before judging in community that whether all UE have GBR, also comprise: according to the timeslot allocation scheme preset, for cell configuration interference coordination function open after time interval resource.
After interference coordination function is opened in community, also comprise: when a predetermined condition is satisfied, close the interference coordination function of community, wherein, predetermined condition comprise following one of at least: the number of users of community is less than the 4th preset thresholding; The edge customer number of community is 0; The GBR of the central user of community not Service Efficiency is greater than the second preset thresholding; The protection timer expiry of community.
Determine that according to the SIR of UE all in community the algorithm of the Gini coefficient of community comprises:
wherein, N is the number of all UE in community, 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 nfor the sir value of UE all in community, as 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 nfor the sir value of UE all in community,
According to a further aspect in the invention, provide a kind of Inter-Cell Interference Coordination device, comprising: ensure judge module, for judging in community, whether all user equipment (UE)s all have guarantee bit rate GBR; Coefficient determination module, for when UE not every in community has GBR, obtains the signal-to-jamming ratio SIR of all UE in community, and determines the Geordie Gini coefficient of community according to the SIR of UE all in community; Function opening module, for when above-mentioned Gini coefficient is greater than the first preset thresholding, opens the interference coordination function of community.
Above-mentioned Inter-Cell Interference Coordination device, also comprises: center judge module, and for when UE all in community has GBR, whether the GBR judging central user in community not Service Efficiency is less than or equal to the second preset thresholding; Edge judge module, for when Service Efficiency is not less than or equal to the second preset thresholding to the GBR of central user, whether the GBR judging community inward flange user not Service Efficiency is greater than the 3rd preset thresholding; Above-mentioned functions opening module, also for when Service Efficiency is not greater than the 3rd preset thresholding to the GBR of edge customer, opens the interference coordination function of community.
Above-mentioned Inter-Cell Interference Coordination device, also comprises: time slot configuration module, for according to preset timeslot allocation scheme, for cell configuration interference coordination function open after time interval resource.
Above-mentioned Inter-Cell Interference Coordination device, also comprises: function closing module, after opening interference coordination function in community, when a predetermined condition is satisfied, close the interference coordination function of community, wherein, predetermined condition comprise following one of at least: the number of users of community is less than the 4th preset thresholding; The edge customer number of community is 0; The GBR of the central user of community not Service Efficiency is greater than the second preset thresholding; The protection timer expiry of community.
Above-mentioned coefficient determination module determines that according to the SIR of UE all in community the algorithm of the Geordie Gini coefficient of community comprises:
wherein, N is the number of all UE in community, 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 nfor the sir value of UE all in community, as 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 nfor the sir value of UE all in community,
Pass through the present invention, adopt according to UE (User Equipment all in community, subscriber equipment) SIR (Signal toInterference Ratio, signal-to-jamming ratio) Gini (Geordie) coefficient of calculation plot, the situation of change of interference is characterized by Gini coefficient, to determine the scheme of opening or closing the interference coordination function of community, solve in prior art and cannot obtain neighboring BS information in time due to dynamic I CIC interference coordination thus adjust this community, and the problem that the interference coordination effect that the occasion that static interference coordination is only applicable to Load Balanced causes is undesirable, make each community also can obtain good interference coordination effect when load is uneven.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the inter-cell interference coordination method according to the embodiment of the present 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 schematic diagram related in the TIC algorithm according to example of the present invention;
Fig. 4 is the flow chart of the closedown interference coordination function according to example of the present invention;
Fig. 5 is the structured flowchart of the Inter-Cell Interference Coordination device according to the embodiment of the present invention;
Fig. 6 is the structured flowchart of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Fig. 1 is the flow chart of the inter-cell interference coordination method according to the embodiment of the present invention.As shown in the figure, comprise according to the inter-cell interference coordination method of the embodiment of the present invention:
Step S102, judges in community, whether all UE have GBR (Guaranteed BitRate ensures bit rate);
Step S104, when UE not every in community has GBR, obtains the SIR of all UE in community, and determines the Geordie Gini coefficient of community according to the SIR of UE all in community;
Step S106, (is designated as Thr when above-mentioned Gini coefficient is greater than the first preset thresholding 1) time, open the interference coordination function of community.
In the prior art, dynamic I CIC interference coordination due to Iub mouth postpone excessive so neighboring BS information cannot be obtained in time thus adjust this community, and static interference coordination is only applicable to the occasion of Load Balanced, these defects can cause in actual applications that interference coordination effect is undesirable, and are that system brings negative impact.Said method synthetically considers the change of cell load uneven and community user business, with good conditionsily opens interference coordination function, thus greatly enhances the effect of interference coordination, is a kind of Quasi dynamic disturbance coordination method.
In the above-mentioned methods, first to judge in community, whether all UE have GBR, because in fact different judged results correspond to different processing methods.When not every UE has GBR, just need the SIR obtaining all UE further, and the final Gini coefficient determining community according to these SIR.The application here of Gini coefficient is the gap in order to characterize all UE performances in community, just illustrate that when Gini coefficient is larger performance gap in community between UE is larger, at this moment just need to open interference coordination function to reduce this gap, just illustrate that when Gini coefficient is less performance gap in community between UE is less, at this moment just does not need to open interference coordination function.Therefore a thresholding (the first namely above-mentioned thresholding) can just be set, as the foundation opening interference coordination function, when Gini coefficient is greater than this thresholding, then open interference coordination function, when Gini coefficient is less than or equal to this thresholding, then do not open interference coordination function, direct process ends.The value of this thresholding can set according to concrete needs, is different for the value of this thresholding different systems, and can be optimized by emulation, there is an optimal value.
Preferably, as shown in Figure 2, after judging in community that whether all UE have GBR, can further include:
Step S212, when UE all in community has GBR, the GBR judging central user in community not Service Efficiency (is designated as NSR c) whether be less than or equal to the second preset thresholding and (be designated as Thr 2);
Step S214, when Service Efficiency is not less than or equal to the second preset thresholding to the GBR of central user, the GBR judging community inward flange user not Service Efficiency (is designated as NSR edge) whether be greater than the 3rd preset thresholding and (be designated as Thr 3);
Step S216, when Service Efficiency is not greater than the 3rd preset thresholding to the GBR of edge customer, opens the interference coordination function of community.
When UE all in community has GBR, subsequent treatment when not every UE has a GBR in its subsequent treatment and community is distinct.When UE all in community has GBR, whether the GBR just needing to judge further central user not Service Efficiency is less than or equal to the second preset thresholding, namely judge that whether the performance of central user is enough good, because to some degree, interference coordination is the performance by sacrificing Cell Center User, improve the performance of Cell Edge User, when central user GBR can not be guaranteed time, it is nonsensical for doing interference coordination.When the performance of central user is enough good, whether the GBR that just can judge edge customer further not Service Efficiency is greater than the 3rd preset thresholding, and namely whether the performance of edge customer is enough poor, because significantly, only when the poor-performing of edge customer, do interference coordination and be only significant.When above-mentioned condition has one not meet, just there is no need to open interference coordination function, flow process just can finish.It should be noted that, for different systems, the value of the second above-mentioned thresholding, the 3rd thresholding is also different, and the value of these two thresholdings also can be optimized by emulation, there is an optimal value.
Here can see, according in community whether all UE all there is the difference of the result of the judgement of GBR, follow-up process just point in order to two kinds, as shown in Figure 2, wherein, step S206-step S210 and step S216 is just equivalent to above-mentioned step S102-step S106.
Preferably, as shown in Figure 2, before judging in community that whether all UE have GBR, can further include:
Step S202, configuration time interval resource, namely according to preset timeslot allocation scheme, for cell configuration interference coordination function open after time interval resource.
Above-mentioned steps adopts TIC algorithm after mainly opening interference coordination function for community, when system is in initial condition, each base station can according to the timeslot allocation scheme preset, for each cell configuration interference coordination function open after time interval resource, above-mentioned timeslot allocation scheme only when this coordinating district interference function is opened use.After community enters ICIC, there is its fixing special TTI each community, when special TTI arrives, and priority scheduling edge customer, and improve transmitting power.No special TTI does not then dispatch edge customer, control centre user, and reduces central user transmitting power.
Generally speaking (can with reference to figure 2), above preferred embodiment can comprise the following steps:
1, when system is in initial condition, each base station according to preset timeslot allocation scheme, for each cell configuration interference coordination function open after time interval resource;
2, when UE all in community have GBR to ensure, proceed to step 3, when UE not all in community has GBR to ensure, then proceed to step 4;
3, when central user GBR not Service Efficiency be greater than the second thresholding and do not enter interference coordination, when Service Efficiency is not less than or equal to the second thresholding to central user GBR, proceed to step 5;
4, the SIR of all UE in calculation plot, utilizes the SIR of all UE in community to calculate the Gini coefficient of this community.This Gini coefficient is compared with the first thresholding, when Gini coefficient is greater than the first thresholding, opens the interference coordination function of community, otherwise do not open the interference coordination function of community;
5, edge customer GBR not Service Efficiency be greater than the interference coordination function that the 3rd thresholding then opens community, otherwise, do not open interference coordination function.
Preferably, after interference coordination function is opened in community, can further include:
When a predetermined condition is satisfied, close the interference coordination function of community, wherein, above-mentioned predetermined condition can comprise following one of at least: the number of users of community is less than the 4th preset thresholding and (is designated as Thr 4); The edge customer number of community is 0; The GBR of the central user of community not Service Efficiency is greater than above-mentioned the second preset thresholding; The protection timer expiry of community.
In specific implementation process, after interference coordination function is opened, when some condition is fulfilled, just there is no need to proceed interference coordination again, such as, the number of users of community is less than the 4th preset thresholding, namely the user in community is less, because user is less, so the performance of each user will improve naturally, therefore just interference coordination need not be proceeded; The edge customer number of community is 0, and when not having edge customer in community, be also just far from being interference coordination naturally; The GBR of the central user of community not Service Efficiency is greater than above-mentioned the second preset thresholding, and when the performance of central user can not ensure, then it is just nonsensical to carry out interference coordination; The protection timer expiry of community, when community has protection timer, when protecting timer expiry, interference coordination just stopped naturally.It should be noted that, the condition of closing coordinating district interference function is not limited to above-mentioned 4 kinds, can expand as the case may be.
Preferably, determine according to the SIR of UE all in community that the algorithm of the Geordie Gini coefficient of this community comprises:
Gini = 1 - 2 Σ i = 1 N - 1 [ ( 1 - 2 * i + 1 2 * N ) * ( p i , 2 - p i - 1,2 ) ] , Wherein,
N is the number of all UE in community, 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 nfor the sir value of UE all in community, as 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 nfor the sir value of UE all in community,
Above-mentioned algorithm can be divided into two steps to complete:
Step 1: establish the SIR of UE to be respectively Sir 1, Sir 2..., Sir n, have Min=min (Sir 1, Sir 2..., Sir n), if Min≤0, then have p i=(i/N, (Sir 1-Min+1)/Sir total), if Min > 0, then have p i=(i/N, Sir i/ Sir total);
Step 2: be in the square of 1 in the length of side, by little to drawing greatly following N point: p 1, p 2..., p n, connect this N point, then with initial point p 0=(0,0) couples together; Draw the diagonal in the foursquare lower left corner and the upper right corner, the curve that this diagonal and above-mentioned N point connect into forms a closed interval, and this intervening areas is S total; Gini=S total/ (1/2), wherein 1/2 is the area of lower triangle, i.e. Gini=2*S total, Gini coefficient is 1 to the maximum, and minimum is 0, and concrete calculation procedure is as follows:
B = Σ i = 1 N [ 1 / 2 * ( 1 - p i - 1,1 + 1 - p i , 1 ) * ( p i , 2 - p i - 1,2 ) ]
= Σ i = 1 N [ 1 / 2 * ( 2 - p i - 1,1 - p i , 1 ) * ( p i , 2 - p i - 1,2 ) ]
= Σ i = 1 N [ ( 1 - 2 * i + 1 2 * N ) * ( p i , 2 - p i - 1,2 ) ]
The B value of above-mentioned formulae discovery is the area surrounding region below calculated curve with X-axis.Because this region to be trapezoidally made up of several, therefore be the formula of trapezoidal area inside summation symbol.
Therefore, Gini=2*S total=2* (1/2-B)=1-2B.
Be described in detail to above preferred embodiment below in conjunction with example, whole example comprises the following steps:
Step 1, initialization.What initialization was mainly carried out is that each base station is according to the timeslot allocation scheme preset, for each cell configuration interference coordination function open after time interval resource, above-mentioned timeslot allocation scheme mainly refers to the time slot allocation related in TIC algorithm, and this timeslot allocation scheme only uses when this coordinating district interference function is opened.
TIC algorithm design thought is for each community arranges one section of special TTI (Transmission Time Tnterval, Transmission Time Interval), the special TTI of neighbor cell is in staggered configuration, in special TTI, the priority of edge customer is improved in each NodeB (Node B) side, with this reach neighbor cell stagger scheduling edge customer object, and adjacent area reduces the transmitting power of dispatched users at the moment, to reduce the interference to current area edge customer.
The main points of this algorithm are to each cell configuration special time period, namely soft time-multiplexed.A kind of simple collocation method is 1: 3 multiplexing, as shown in Figure 4, and T sfor special TTI length, default configuration 100 subframe lengths.Three the community number consecutivelies controlled each base station are 1,2,3, number as special scheduling slot.As shown in Figure 4, the special TTI section of different shading distributes to the community of corresponding shading.
Step 2, for carrying out margin and center user judgement (with reference to step S204 in figure 2), the foundation of adjudicating here is the SNPL (Serving and Neighbor Cell Path Loss, Serving cell and neighbor cell path loss) of UE.When SNPL is less than a thresholding, then thinks edge customer, otherwise think central user.The recommendation of thresholding is 2dB.Certainly, when edge customer and central user are determined, this step has not just needed.
Step 3, judges in this community, whether all UE have GBR, if perform step 4, if fruit is no, performs step 6.
Step 4, when the business that this community UE passes has GBR to ensure, judge the performance of Cell Center User, due to some degree, interference coordination is the performance by sacrificing Cell Center User, improve the performance of Cell Edge User, when central user GBR can not be guaranteed time, it is nonsensical for doing interference coordination.Only have central user GBR not Service Efficiency be less than or equal to a thresholding (Thr 2) time perform step 5, otherwise interference coordination function is not opened in community.
Step 5, the performance of edge user judges, is greater than a thresholding (Thr when edge customer GBR does not meet 3) time, just open the interference coordination function of community.
Step 6, when the business that this community UE passes does not have GBR to ensure, then calculates Gini coefficient to judge the gap of all UE performances in community, when the performance gap of all UE is greater than a thresholding (Thr 1) time, interference coordination function is opened in community, otherwise does not open.
Thresholding (the Thr here related to 1, Thr 2, Thr 3), its concrete value needs to be optimized by emulation, there is an optimal value.
The escape mechanism (namely closing the flow process of interference coordination function) of ICIC as shown in Figure 4, has several situation to exit ICIC.When community user number is less than a thresholding (Thr 4) time, or there is not edge UE and then exit ICIC in current area.Because ICIC sacrifices central user performance to improve marginal user performance, therefore when center user performance is after ICIC opens, decline more, when central user GBR not Service Efficiency be greater than a thresholding (Thr 2), then must consider to exit ICIC, refer step S404.In order to avoid community ICIC open to exit with ICIC before pingpang handoff, each community is provided with a protection timer, refer step 406, and when community is in non-ICIC state, timer resets, and when community is in ICIC state, timer is started working.After execution step 404, if this protection timer expiry, Ze Gai exits ICIC in community, otherwise does not exit.
Equally, the thresholding (Thr mentioned here 2, Thr 4) with time limit of protection timer, its concrete value needs to be optimized by emulation, there is an optimal value.
Simulating, verifying proves, by above-mentioned flow process, in the uniform situation of each cell load, the program is suitable with static ICIC, and when in the uneven situation of each cell load, this programme has the gain of 10%-25% than static ICIC scheme.
Fig. 5 is the structured flowchart of the Inter-Cell Interference Coordination device according to the embodiment of the present invention.As shown in Figure 5, comprise according to the Inter-Cell Interference Coordination device of the embodiment of the present invention:
Ensure judge module 504, for judging in community, whether all UE have GBR;
Coefficient determination module 506, is connected with guarantee judge module 504, and for when UE not every in community has GBR, and the SIR of all UE in acquisition community, and the Geordie Gini coefficient of community is determined according to the SIR of UE all in community;
Function opening module 508, is connected with coefficient determination module 506, for when Gini coefficient is greater than the first preset thresholding, opens the interference coordination function of community.
Said apparatus applies a kind of Quasi dynamic interference coordination schemes, synthetically considers the change of cell load uneven and community user business, with good conditionsily opens interference coordination function, greatly enhances the effect of interference coordination.
In said apparatus, ensure that judge module 504 is mainly used in judging in community, whether all UE have GBR, because in fact different judged results correspond to different processing methods.When not every UE has GBR, coefficient determination module 506 just needs the SIR obtaining all UE further, and the final Gini coefficient determining community according to these SIR.The application here of Gini coefficient is the gap in order to characterize all UE performances in community, just illustrate that when Gini coefficient is larger performance gap in community between UE is larger, at this moment just need to open interference coordination function to reduce this gap, just illustrate that when Gini coefficient is less performance gap in community between UE is less, at this moment just does not need to open interference coordination function.Therefore a thresholding (the first namely above-mentioned thresholding) can just be set, as the foundation opening interference coordination function, when Gini coefficient is greater than this thresholding, function opening module 508 just opens interference coordination function, when Gini coefficient is less than or equal to this thresholding, then do not open the direct process ends of interference coordination function.The value of this thresholding can set according to concrete needs, and the value for this thresholding different systems can be optimized by emulation, there is 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 present invention:
Center judge module 510, is connected with guarantee judge module 504, and for when UE all in community has GBR, whether the GBR judging central user in community not Service Efficiency is less than or equal to the second preset thresholding;
Edge judge module 512, is connected with center judge module 510, and for when Service Efficiency is not less than or equal to the second preset thresholding to the GBR of central user, whether the GBR judging community inward flange user not Service Efficiency is greater than the 3rd preset thresholding.
Above-mentioned functions opening module 508, is also connected with edge judge module 512, also for when Service Efficiency is not greater than the 3rd preset thresholding to the GBR of edge customer, opens the interference coordination function of community.
When UE all in community has GBR, subsequent treatment when not every UE has a GBR in its subsequent treatment and community is distinct.When UE all in community has GBR, whether the GBR that center judge module 510 just needs to judge further central user not Service Efficiency is less than or equal to the second preset thresholding, namely judge that whether the performance of central user is enough good, because to some degree, interference coordination is the performance by sacrificing Cell Center User, improve the performance of Cell Edge User, when central user GBR can not be guaranteed time, it is nonsensical for doing interference coordination.When the performance of central user is enough good, whether the GBR that edge judge module 512 just can judge edge customer further not Service Efficiency is greater than the 3rd preset thresholding, namely whether the performance of edge customer is enough poor, because significantly, only when the poor-performing of edge customer, do interference coordination and be only significant.When above-mentioned condition has one not meet, just there is no need to open interference coordination function.It should be noted that, for different systems, the value of the second above-mentioned thresholding, the 3rd thresholding is different, and the value of these two thresholdings also can be optimized by emulation, there is 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 present invention:
Time slot configuration module 502, is connected with guarantee judge module 504, for according to default timeslot allocation scheme, for cell configuration interference coordination function open after time interval resource.
Time slot configuration module 502 can adopt the device of TIC algorithm to establish after mainly opening interference coordination function for community, when system is in initial condition, time slot configuration module 502 can according to preset timeslot allocation scheme, for each cell configuration interference coordination function open after the above-mentioned timeslot allocation scheme of time interval resource only when this coordinating district interference function is opened use.After community enters ICIC, there is its fixing special TTI each community, when special TTI arrives, and priority scheduling edge customer, and improve transmitting power.No special TTI does not then dispatch edge customer, control centre user, and reduces 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 present invention:
Function closing module 514, be connected with function opening module 508, after opening interference coordination function in community, when a predetermined condition is satisfied, close the interference coordination function of community, wherein, above-mentioned predetermined condition can comprise following one of at least: the number of users of community is less than the 4th preset thresholding; The edge customer number of community is 0; The GBR of the central user of community not Service Efficiency is greater than above-mentioned the second preset thresholding; The protection timer expiry of community.
In specific implementation process, after interference coordination function is opened, when some condition is fulfilled, just there is no need to proceed interference coordination again, interference coordination function will be closed by function closing module 514, such as, the number of users of community is less than the 4th preset thresholding, and the user namely in community is less, because user is less, so the performance of each user will improve naturally, therefore just interference coordination need not be proceeded; The edge customer number of community is 0, and when not having edge customer in community, be also just far from being interference coordination naturally; The GBR of the central user of community not Service Efficiency is greater than above-mentioned the second preset thresholding, and when the performance of central user can not ensure, then it is just nonsensical to carry out interference coordination; The protection timer expiry of community, when community has protection timer, when protecting timer expiry, interference coordination just stopped naturally.It should be noted that, the condition of closing the interference coordination function of community is not limited to above-mentioned 4 kinds, can expand as the case may be.
Preferably, coefficient determination module 506 determines that according to the SIR of UE all in community the algorithm of the Gini coefficient of this community comprises:
Gini = 1 - 2 Σ i = 1 N [ ( 1 - 2 * i + 1 2 * N ) * ( p i , 2 - p i - 1,2 ) ] , Wherein,
N is the number of all UE in community, 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 nfor the sir value of UE all in community, as 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 nfor the sir value of UE all in community,
Coefficient determination module 506 performs the process of above-mentioned algorithm, has a detailed description hereinbefore, repeats no more herein.
From above description, can find out, technical scheme provided by the invention is some key parameters by measuring this community, the situation of change of interference is characterized by these parameters, when marginal user performance worsens, then open the interference coordination function of community, the interference environment when this community improves, then close the interference coordination function of community, propose a kind of interference coordination technique that can consider the uneven and community user business situation of change of cell load.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent 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 in community, whether all user equipment (UE)s all have guarantee bit rate GBR;
When UE not every in described community has GBR, obtain the signal-to-jamming ratio SIR of all UE in described community, determine the Geordie Gini coefficient of described community according to the SIR of UE all in described community;
When described Gini coefficient is greater than the first preset thresholding, open the interference coordination function of described community.
2. method according to claim 1, is characterized in that, after judging in described community that whether all UE have GBR, also comprises:
When UE all in described community has GBR, whether the GBR judging central user in described community not Service Efficiency is less than or equal to the second preset thresholding;
When Service Efficiency is not less than or equal to described the second preset thresholding to the GBR of described central user, whether the GBR judging described community inward flange user not Service Efficiency is greater than the 3rd preset thresholding;
When Service Efficiency is not greater than described the 3rd preset thresholding to the GBR of described edge customer, open the interference coordination function of described community.
3. method according to claim 2, is characterized in that, before judging in described community that whether all UE have GBR, also comprises:
According to preset timeslot allocation scheme, for described cell configuration interference coordination function open after time interval resource.
4. method according to claim 3, is characterized in that, after interference coordination function is opened in described community, also comprises:
When a predetermined condition is satisfied, close the interference coordination function of described community, wherein, described predetermined condition comprise following one of at least:
The number of users of described community is less than the 4th preset thresholding;
The edge customer number of described community is 0;
The GBR of the central user of described community not Service Efficiency is greater than described the second preset thresholding;
The protection timer expiry of described community.
5. the method according to any one of claim 1-4, is characterized in that, determines that the algorithm of the Geordie Gini coefficient of described community comprises according to the SIR of UE all in described community:
Gini = 1 - 2 Σ i = 1 N [ ( 1 - 2 * i + 1 2 * N ) * ( p i , 2 - p i - 1,2 ) ] , Wherein,
N is the number of all UE in described community, 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 nfor the sir value of UE all in described community, as 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 nfor the sir value of UE all in described community,
6. an Inter-Cell Interference Coordination device, is characterized in that, comprising:
Ensure judge module, for judging in community, whether all user equipment (UE)s all have guarantee bit rate GBR;
Coefficient determination module, for when UE not every in described community has GBR, obtains the signal-to-jamming ratio SIR of all UE in described community, determines the Geordie Gini coefficient of described community according to the SIR of UE all in described community;
Function opening module, for when described Gini coefficient is greater than the first preset thresholding, opens the interference coordination function of described community.
7. device according to claim 6, is characterized in that, also comprises:
Center judge module, for when UE all in described community has GBR, whether the GBR judging central user in described community not Service Efficiency is less than or equal to the second preset thresholding;
Edge judge module, for when Service Efficiency is not less than or equal to described the second preset thresholding to the GBR of described central user, whether the GBR judging described community inward flange user not Service Efficiency is greater than the 3rd preset thresholding;
Described function opening module, also for when Service Efficiency is not greater than described the 3rd preset thresholding to the GBR of described edge customer, opens the interference coordination function of described community.
8. device according to claim 7, is characterized in that, also comprises:
Time slot configuration module, for according to preset timeslot allocation scheme, for described cell configuration interference coordination function open after time interval resource.
9. device according to claim 8, is characterized in that, also comprises:
Function closing module, after opening interference coordination function in described community, when a predetermined condition is satisfied, closes the interference coordination function of described community, wherein, described predetermined condition comprise following one of at least:
The number of users of described community is less than the 4th preset thresholding;
The edge customer number of described community is 0;
The GBR of the central user of described community not Service Efficiency is greater than described the second preset thresholding;
The protection timer expiry of described community.
10. the device according to any one of claim 6-9, is characterized in that, described coefficient determination module determines that according to the SIR of UE all in described community the algorithm of the Geordie Gini coefficient of described community comprises:
Gini = 1 - 2 Σ i = 1 N [ ( 1 - 2 * i + 1 2 * N ) * ( p i , 2 - p i - 1,2 ) ] , Wherein,
N is the number of all UE in described community, 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 nfor the sir value of UE all in described community, as 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 nfor the sir value of UE all in described community,
CN201110091173.5A 2011-04-12 2011-04-12 Inter cell interference coordination (ICIC) method and apparatus thereof Active CN102740301B (en)

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 CN102740301A (en) 2012-10-17
CN102740301B true 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)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106488574B (en) * 2015-08-31 2020-02-04 展讯通信（上海）有限公司 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8009581B2 (en) * 2006-06-12 2011-08-30 Telefonaktiebolaget Lm Ericsson (Publ) Method in a scheduler for reducing inter-cell interference
KR100902266B1 (en) * 2006-11-03 2009-06-10 삼성전자주식회사 Apparatus and method for controlling reverse data transmission rate in mobile communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
Title
宽带0FDM系统的干扰协调技术;郑侃;《现代电信科技》;20070630;全文 *
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》.2010,全文. *

Also Published As

Publication number Publication date
CN102740301A (en) 2012-10-17

Similar Documents

Publication Publication Date Title
JP6175522B2 (en) System and method for interference reduction in heterogeneous networks
Sun et al. D2D enhanced heterogeneous cellular networks with dynamic TDD
Sun et al. Uplink interference mitigation for OFDMA femtocell networks
EP2663111B1 (en) Capacity and coverage self-optimization method and device in mobile network
Zhang et al. Spectrum allocation and power control in full-duplex ultra-dense heterogeneous networks
Xu et al. Interference management for D2D communications in heterogeneous cellular networks
US9226232B2 (en) Power management in a cellular system
CN102740301B (en) Inter cell interference coordination (ICIC) method and apparatus thereof
CN103491619B (en) A kind of cognitive TD-LTE system ascending power control method considering vertical and horizontal interference
Liu et al. Performance gain of full duplex over half duplex under bidirectional traffic asymmetry
Sial et al. A novel and realistic hybrid downlink-uplink coupled/decoupled access scheme for 5G HetNets
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
You et al. Energy-aware wireless relay selection in load-coupled OFDMA cellular networks
Hamouda et al. A game theoretic power control scheme for femtocells under macro-user QoS constraint
Mohammadi et al. Spectrum allocation using fuzzy logic with optimal power in wireless network
Alquhali et al. Enhanced fractional frequency reuse approach for interference mitigation in femtocell networks
CN104202807B (en) Ascending power control method and system
Michel et al. Performance evaluation of the eICIC technique applied to a heterogeneous 4G mobile network
Ting et al. Downlink co-tier interference mitigation for femtocell networks
Bandari et al. ICon: interference concentration for uplink in multiCell OFDMA networks
Sahu et al. Enhancing cost efficiency of femto cell by mobile traffic offloading
Dong et al. Coalition based interference mitigation in femtocell networks with multi-resource allocation
Mwakwata et al. Inter-cell interference reduction scheme for uplink transmission in NB-IoT 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

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.

TR01 Transfer of patent right