CN105338533A - Inter-cell interference coordination method and device - Google Patents

Abstract

The invention discloses an inter-cell interference coordination method and a device. The method comprises steps: cells in each base station are grouped, wherein cells whose mutual interference is in an allowable range are divided into a group; a working frequency band is distributed for each cell group respectively, the working frequency band distributed for the cells in the same group has the same central frequency point, and the working frequency bands distributed for cells in different groups have different central frequency points. According to the technical scheme provided by the embodiment of the invention, interference coordination is carried out on cells in each base station in an integrated mode, and compared with an ICIC distributive coordination mode, inter-cell interface load is reduced. In addition, interference coordination is carried out on cells in each base station in an integrated mode, cells in each base station are grouped firstly, cells whose mutual interference exceeds the allowable range are divided into different groups, different central frequency points are distributed, interference is effectively reduced, and interference coordination effects are ensured.

Description

A kind of inter-cell interference coordination method and device

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of inter-cell interference coordination method and device.

Background technology

In a wireless communication system, signal is propagated by wireless environment, under many base station deployment, if adjacent base station adopts identical operating frequency, in most systems, as OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM), in system, code division multiple access (CodeDivisionMultipleAccess, CDMA) system, neighbor cell interference can be caused, thus cause frequency spectrum resource effectively not used, reduce wireless system transmission performance.

To adopt Long Term Evolution (LongTermEvolution, the LTE) system of OFDM technology.In LTE system, base station is that the running time-frequency resource of terminal distribution different sub carrier carries out business datum Signal transmissions, and in community, terminal room does not disturb.If but different districts uses identical frequency resource, then can presence of intercell interference be caused between neighbor cell.

Along with mobile communication is more and more universal, reply business demand, wireless communication system, while dense deployment community, also must minimize presence of intercell interference, to ensure systematic function.

Interference coordination technique in current LTE system has inter-cell interference cancellation (Inter-cellInterferenceCoordination, ICIC) technology.ICIC technology refer to load instruction by carrying out neighbor cell between adjacent base station and high interference indication information mutual, under base station, the mode of minizone employing distributed coordination, carries out interference coordination.The mode of interference coordination can be: if community 1 load is high, serious interference, the central user of adjacent cell 2 can use the whole resource of frequency range in community, minimizing edge customer Resourse Distribute or edge customer only use part resource, to ensure the Signal transmissions of community 1 user.

Current emulation and application all show that ICIC technology is not fine for the effect of Inter-Cell Interference Coordination, raising power system capacity.

Under dense deployment cell scenario (hereinafter referred to as dense deployment scene), problem of inter-cell interference is than more outstanding and serious under grand net deployment scenario, because community is intensive, the number of cells that Inter-Cell Interference Coordination relates to is more, mutual by distributed signaling, signalling demand is large, cause minizone interface load overweight, and many owing to involving node, the effectiveness comparison of distribute amplification tuning algorithm is poor.

In addition, the interference problem of what ICIC mainly solved is minizone under identical networking, under identical networking, the center frequency point of community and bandwidth are relatively-stationary.Under dense deployment scene, cell operation is at high band, and the working frequency range that base station allows is wider, can flexible utilization frequency resource, the problem of inter-cell interference under adopting ICIC technology cannot solve dense deployment scene.

Summary of the invention

The object of this invention is to provide a kind of inter-cell interference coordination method and device, to solve the problem of ICIC interference coordination weak effect.

The object of the invention is to be achieved through the following technical solutions:

A kind of inter-cell interference coordination method, comprising:

Divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group;

Be respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

Preferably, identical with group community institute assignment frequency range.

Based on above-mentioned any means embodiment, preferably, is divided into groups in the community of each base station, comprising:

Determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group;

Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group;

Each community ungrouped is added respectively and disturbs in minimum group by it.

Preferably, determine to comprise the community that the interference that is subject in the community of each base station is maximum:

Determine the interference adjacent area of the community of each base station;

The community calculating each base station is interfered the interference of adjacent area;

According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, determine to comprise the community that the interference that is subject in the community of each base station is maximum:

The community calculating each base station is subject to the interference of other communities;

According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, find in ungrouped community and maximum community disturbed to non-NULL group, comprising:

Determine the interference adjacent area of the community of each base station;

Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group;

Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, find in ungrouped community and maximum community disturbed to non-NULL group, comprising:

Calculate the interference of ungrouped community to the community in non-NULL group;

Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, each community ungrouped is added respectively and disturbs in minimum group by it, comprising:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Preferably, each community ungrouped is added respectively and disturbs in minimum group by it, comprising:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Based on above-mentioned any means embodiment, preferably, when having new community, the method also comprises:

Calculate the interference that described new community is organized each;

Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community;

For described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.

Based on above-mentioned any means embodiment, preferably, when having community closedown or load to reduce, the method also comprises:

Search respectively in each group and be subject to organizing the maximum community of interior interference;

Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined;

The working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

Preferably, repeat the set-up procedure of above-mentioned cell group, until the community number carrying out dividing into groups to adjust reaches predetermined value.

Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of Inter-Cell Interference Coordination device, comprising:

Cell group module, for being divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group;

Working frequency range distribution module, for being respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

Preferably, identical with group community institute assignment frequency range.

Based on above-mentioned any device embodiment, preferably, described cell group module specifically for:

Determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group;

Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group;

Each community ungrouped is added respectively and disturbs in minimum group by it.

Preferably, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

The community calculating each base station is interfered the interference of adjacent area;

According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

The community calculating each base station is subject to the interference of other communities;

According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, find when maximum community disturbed to non-NULL group in ungrouped community, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group;

Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, find when maximum community disturbed to non-NULL group in ungrouped community, described cell group module specifically for:

Calculate the interference of ungrouped community to the community in non-NULL group;

Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, each community ungrouped is added respectively when disturbing in minimum group by it, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Preferably, each community ungrouped is added respectively when disturbing in minimum group by it, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Based on above-mentioned any device embodiment, preferably, when having new community:

Described cell group module also for, calculate the interference that described new community is organized each; Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community;

Described working frequency range distribution module also for, be described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.

Based on above-mentioned any device embodiment, preferably, when having community closedown or load to reduce:

Described cell group module also for, search respectively in each group and be subject to organizing the maximum community of interior interference; Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined;

Described working frequency range distribution module also for, the working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

Preferably, repeat the set-up procedure of above-mentioned cell group and working frequency range, until the community number carrying out dividing into groups to adjust reaches predetermined value.

Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, comprising:

Processor, this processor is configured to perform the computer program possessing following function: divided into groups the community of each base station, and wherein, the community of mutual interference in allowed band is divided into one group; Be respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different;

Memory, this memory is configured to the code preserving above computer program.

Preferably, identical with group community institute assignment frequency range.

Based on above-mentioned any base station embodiment, preferably, processor is also configured to perform the computer subprogram possessing following function: determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group; Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group; Each community ungrouped is added respectively and disturbs in minimum group by it.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: the interference adjacent area determining the community of each base station; The community calculating each base station is interfered the interference of adjacent area; According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: the community calculating each base station is subject to the interference of other communities; According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: the interference adjacent area determining the community of each base station; Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group; Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: calculate the interference of ungrouped community to the community in non-NULL group; Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: for each group is determined that one is disturbed maximum ungrouped community to it respectively; Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community; Repeat above-mentioned steps until added in group all ungrouped communities.Memory is also configured to the code preserving above computer subprogram.

Preferably, processor is also configured to perform the computer subprogram possessing following function: for each group is determined that one is disturbed maximum ungrouped community to it respectively; Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community; Repeat above-mentioned steps until added in group all ungrouped communities.Memory is also configured to the code preserving above computer subprogram.

Based on above-mentioned any base station embodiment, preferably, processor is also configured to perform the computer program possessing following function: when having new community, calculates the interference that described new community is organized each; Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community; For described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.Memory is also configured to the code preserving above computer program.

Based on above-mentioned any base station embodiment, preferably, processor is also configured to perform the computer program possessing following function: when having community closedown or load to reduce, search respectively and be subject to organizing the maximum community of interior interference in each group; Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined; The working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.Memory is also configured to the code preserving above computer program.

Preferably, repeat the set-up procedure of above-mentioned cell group and working frequency range, until the community number carrying out dividing into groups to adjust reaches predetermined value.

The technical scheme that the embodiment of the present invention provides, concentrates and carries out interference coordination to the community of each base station, than the distributed coordination mode of ICIC, decrease minizone interface load.In addition, concentrate and interference coordination is carried out to the community of each base station, first divided into groups in the community of each base station, the community making presence of intercell interference exceed allowed band is in different groups, distribute different center frequency point, thus effectively reduce interference, improve radio transmission performance, thus raising power system capacity, ensure interference coordination effect.

Accompanying drawing explanation

The inter-cell interference coordination method flow chart that Fig. 1 provides for the embodiment of the present invention;

The device schematic diagram that Fig. 2 provides for the embodiment of the present invention;

The base station schematic diagram that Fig. 3 provides for the embodiment of the present invention.

Embodiment

Before by specific embodiment technical scheme provided by the invention being described, first some technical characteristics related in the embodiment of the present invention are explained.

Centralized node, a centralized node can control multiple base station.Centralized node can be logic entity, also can be independently equipment.Such as, can be the equipments of the core network such as standalone gateway (GW), also can be software or the hardware module being arranged on the equipments of the core network such as GW, it can be core net node, can be Operations, Administration and Maintenance (OperationAdministrationandMaintenance, OAM) node, also can be the software or the hardware module that are arranged on OAM node, can be base station, also can be the software or the hardware module that are arranged on base station.A centralized node can control multiple base station.

Base station, in the embodiment of the present invention, base station refers to small station, as low power nodes (LowPowerNode, LPN), femto base station (pico), Home eNodeB (femto), access point (AccessPoint, AP) etc.Have one or more community under a base station, under dense deployment scene, You Yige community under a usual base station, also can be described as small-cell.

Community, if base station (small station) is operated in a center frequency point, so, this base station is divided into a community, the working frequency points of this community and the working frequency points (center frequency point) of base station.If base station operation is in two or more center frequency point, so, this base station is divided into two or more communities, and the quantity of community is the working frequency points quantity of base station, and the working frequency points of each community is a working frequency points of base station.

Adjacent area interference relationships table, adjacent area interference relationships table, based on cell maintenance, refers to for each community, needs unified one group of community of carrying out coordinating to avoid interference with it.Can think that presence of intercell interference is caused in the Bu Duigai community, community beyond the interference relationships table of adjacent area, can not interference coordination be carried out.

The working frequency range allowed, namely the actual operable frequency range in base station, relevant with operator with the capacity of equipment of base station, for authorizing the part or all of of frequency range.

Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described in detail.

The inter-cell interference coordination method that the embodiment of the present invention provides as shown in Figure 1, specifically comprises following operation:

Step 100, divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group.

Interference between each community under same base station is maximum, and need by these little differentiations in different groups, therefore, packet count should be greater than the maximum of the number of cells under each base station.

In the embodiment of the present invention, one group also can be described as cluster.

In the embodiment of the present invention, each base station refers to each base station of concentrating and carrying out Inter-Cell Interference Coordination.

Step 110, be respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

The method that the embodiment of the present invention provides can but be not limited only to realize in centralized node.

The technical scheme that the embodiment of the present invention provides, concentrates and carries out interference coordination to the community of each base station, than the distributed coordination mode of ICIC, decrease minizone interface load.In addition, concentrate and interference coordination is carried out to the community of each base station, first divided into groups in the community of each base station, the community making presence of intercell interference exceed allowed band is in different groups, distribute different center frequency point, thus effectively reduce interference, improve radio transmission performance, thus raising power system capacity, ensure interference coordination effect.

In the embodiment of the present invention, can be the same or different with group community institute assignment frequency range.For ease of distributing and management, preferably, the working frequency range with group community is identical, and the center frequency point namely with Zu Ge community not only working frequency range is identical, and the bandwidth of working frequency range is also identical.

In the embodiment of the present invention, the allowed band of above-mentioned presence of intercell interference both can be defined by concrete interference threshold, also can define by other means.Below by the implementation of concrete example description of step 100.

Preferably, the implementation of above-mentioned steps 100 is:

Determine the community that the interference that is subject in the community of each base station is maximum, and the maximum community of the interference this be subject to adds one empty group; Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Each community ungrouped is added respectively and disturbs in minimum group by it.

Wherein, empty group refers to also do not have community to add this group, and non-NULL group refers in this group to have a community at least.

Wherein, be the interference sum to each community in this non-NULL group to the interference of a non-NULL group.If Liang Ge does not disturb adjacent area in community each other, then can think to there is not interference between this Liang Ge community, therefore, the interference sum to each community in this non-NULL group can be thought to the interference sum of interference adjacent area each in a non-NULL group.

Wherein, if there is two or more non-NULL group, disturbing maximum community to non-NULL group, is determine by comparing the interference maximum of community to each non-NULL group.

In above-mentioned processing procedure, if there be N number of group, then first find the community that N number of mutual interference is maximum, be divided into this N number of group respectively.To all the other ungrouped communities, be divided into respectively and disturbed minimum group by it.That is, will larger community being disturbed each other to be divided into different groups as far as possible, being divided into identical group by disturbing less community each other.In the embodiment of the present invention, can think according in the group result that above-mentioned processing procedure obtains, with the interference of the minizone in group in allowed band.

With concrete example, above-mentioned processing procedure is described below.Suppose that the packet count determined is N, be denoted as C respectively ₁~ C _n, each base station central controlled has M community (Cell ₁~ Cell _m).

First determine to be assumed to be Cell in the community that the presence of intercell interference that is subject to is maximum from M community ₁, and by Cell ₁add one empty group, such as C ₁.

Then from ungrouped community Cell ₂~ Cell _min search C ₁disturb maximum community, suppose it is Cell ₂, then by Cell ₂add one empty group, such as C ₂; Continue at ungrouped community Cell ₃~ Cell _min, calculate the interference of these communities to each non-NULL group respectively, and determine the interference maximum of these communities to each non-NULL group respectively, compare the interference maximum of these communities to each non-NULL group and determine to disturb maximum community to non-NULL group, suppose it is Cell ₃, by Cell ₃add one empty group, such as C ₃; Until NGe Zujunyou community adds.

Finally, each community ungrouped is added respectively disturb in minimum group by it.

In above-mentioned processing procedure, determine that the implementation of the community that the interference that is subject in the community of each base station is maximum has multiple, only exemplify wherein several below.

Implementation A1:

Determine the interference adjacent area of the community of each base station; The community calculating each base station is interfered the interference of adjacent area; According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

Wherein, interference Neighboring Cell List can being pre-determined, then determining the interference adjacent area of the community of each base station by searching interference Neighboring Cell List.The mode of setting up of adjacent area interference relationships list can but not only comprise the following two kinds:

The first, set up by the mode of nearby region measurement.Concrete, centralized node carries out measurement configuration to each base station, comprises the threshold value (as TH_RSRP) measuring frequency and measuring amount; Nearby region measurement is carried out according to measurement configuration respectively in each base station, is reported by the measured value (as RSRP measured value) of measuring amount of the adjacent cell stored mark (as PCI, ECGI) and the adjacent cell that is greater than TH_RSRP; The adjacent cell PCI that centralized node reports according to base station measurement, RSRP measured value for adjacent area interference relationships table is set up in the community under base station, if the adjacent cell being greater than TH_RSRP is interference adjacent area, otherwise are not interference adjacent areas.

The second, the mode calculated by path loss is set up.Concrete, at the base station deployment initial stage, obtain the circuit loss value between base station by the mode of on-the-spot test, and be stored in centralized node; Centralized node calculates the interference calculation value between base station, and the transmitting power as interference received power=base station is multiplied by the circuit loss value between base station; Centralized node according to the interference received power between base station, for adjacent area interference relationships table is set up in the community under base station, as be greater than pre-determined threshold base station under community be interference adjacent area, otherwise be not interference adjacent area.

Wherein, the interference that can be subject to by following formulae discovery community:

$I\left({\mathrm{Cell}}_i\right)=\underset{{\mathrm{Cell}}_j\∈I_i,i\≠j}{\mathrm{\Σ}}{w}_{j,i}$

Wherein, I (Cell _i) be cell i (Cell _i) interference that is subject to, be the interference of the adjacent area that is interfered here;

I _ifor Cell _iinterference adjacent area set in the interference relationships table of adjacent area;

W _j,ifor Cell _jto Cell _iinterference value, can be the measured value of measuring amount, also can be interference calculation value, Cell _jfor Cell _iinterference adjacent area in the interference relationships table of adjacent area.

Implementation A2:

The community calculating each base station is subject to the interference of other communities; According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

Wherein, other communities refer to other communities in the community of each base station except this community.

Wherein, the interference that can be subject to by following formulae discovery community:

$I\left({\mathrm{Cell}}_i\right)=\underset{{\mathrm{Cell}}_j\∈\mathrm{\Φ},j\≠i}{\mathrm{\Σ}}{w}_{j,i}$

Wherein, I (Cell _i) be Cell _ithe interference be subject to, the interference of other communities be namely subject to here; Φ is the set of cells under each base station.

In above-mentioned processing procedure, in ungrouped community, find that to disturb the implementation of maximum community to have to non-NULL group multiple, only exemplify wherein several below.

Implementation B1:

Determine the interference adjacent area of the community of each base station; Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group; Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Wherein, when calculating the interference of ungrouped community to the interference adjacent area in non-NULL group, for ungrouped each community, calculate its interference to the interference adjacent area in each non-NULL group respectively.Using community to the interference sum of the interference adjacent area in a non-NULL group as the interference to this non-NULL group, more each community is to the interference maximum of each non-NULL group, and the maximum community of comparative result is disturb maximum community to non-NULL group.

Suppose there are two ungrouped community Cell ₄and Cell ₅, have two non-NULL group C ₁and C ₂.Then calculate respectively: Cell ₄to C ₁the interference of middle interference adjacent area, Cell ₄to C ₂the interference of middle interference adjacent area, Cell ₅to C ₁the interference of middle interference adjacent area, Cell ₅to C ₂the interference of middle interference adjacent area.By Cell ₄to C ₁interference and Cell ₅to C ₁interference compare, if Cell ₄to C ₁interference large, so Cell ₄to C ₁disturb maximum community, in like manner find out C ₂disturb maximum community, such as Cell ₅.Again by Cell ₄to C ₁interference and Cell ₅to C ₂interference compare, find and maximum community disturbed to non-NULL group, such as Cell ₅.

Wherein, can by following formulae discovery community to the interference of non-NULL group:

$I({\mathrm{Cell}}_k,C_n)=\underset{{\mathrm{Cell}}_j\∈C_n,{\mathrm{Cell}}_j\∈I_k,k\≠j}{\mathrm{\Σ}}{w}_{k,j}$

Wherein, I (Cell _k, C _n) be Cell _kto C _ninterference, here namely to C _nin the interference sum of interference adjacent area;

I _kfor Cell _kinterference adjacent area set in the interference relationships table of adjacent area;

W _k,jfor Cell _kto C _ninterior Cell _jinterference value, Cell _jfor Cell _kinterference adjacent area in the interference relationships table of adjacent area.

Implementation B2:

Calculate the interference of ungrouped community to the community in non-NULL group; Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Wherein, when calculating the interference of ungrouped community to the community in non-NULL group, for ungrouped each community, calculate its interference to the community in each non-NULL group respectively.Using community to the interference sum of the community in a non-NULL group as the interference to this non-NULL group, more each community is to the interference maximum of each non-NULL group, and the maximum community of comparative result is disturb maximum community to non-NULL group.

Wherein, can by following formulae discovery community to the interference of non-NULL group:

$I({\mathrm{Cell}}_k,C_n)=\underset{{\mathrm{Cell}}_j\∈C_n,k\≠j}{\mathrm{\Σ}}{w}_{k,j}$

Wherein, I (Cell _k, C _n) be Cell _kto C _ninterference, here namely to C _nin the interference sum of community;

C _nfor the set of cells in group n, n=1,2 ..., N;

W _k,jfor Cell _kto C _ninterior Cell _jinterference value, Cell _jfor C _nin community.

In above-mentioned processing procedure, each community ungrouped is added respectively to disturb the implementation in minimum group to have by it multiple, only exemplify wherein several below.

Implementation C1:

For each group is determined that one is disturbed maximum ungrouped community to it respectively; Add disturbing maximum community in the community determined and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community; Repeat above-mentioned steps until added in group all ungrouped communities.

Wherein, in the community determined, disturb maximum community, refer to the maximum community of the interference of the group of correspondence.

Suppose have three to organize C ₁, C ₂and C ₃, have 4 non-packet cell Cell ₁, Cell ₂, Cell ₃and Cell ₄.To C ₁maximum community is disturbed to be Cell ₁, to C ₂maximum community is disturbed to be Cell ₂, to C ₃maximum community is disturbed to be Cell ₃, suppose Cell ₁to C ₁interference be greater than Cell ₂to C ₂interference, and be greater than Cell ₃to C ₃interference, compare Cell ₁to C ₂and C ₃interference, if Cell ₁to C ₂interference be less than C ₃interference, and C ₂in do not have and Cell ₁belong to the community of same base station, then by Cell ₁add C ₂.Cell ₂, Cell ₃and Cell ₄in, to C ₁maximum community is disturbed to be Cell ₃, to C ₂maximum community is disturbed to be Cell ₂, to C ₃maximum community is disturbed to be Cell ₄, suppose Cell ₂to C ₂interference be greater than Cell ₃to C ₁interference, and be greater than Cell ₄to C ₃interference, compare Cell ₂to C ₁and C ₃interference, if Cell ₁to C ₁interference be less than C ₃interference, and C ₁in do not have and Cell ₂belong to the community of same base station, then by Cell ₂add C ₁.Cell ₃and Cell ₄in, to C ₁maximum community is disturbed to be Cell ₃, to C ₂maximum community is disturbed to be Cell ₄, to C ₃maximum community is disturbed to be Cell ₃, suppose Cell ₃to C ₁interference be greater than Cell ₄to C ₂interference, and be greater than it to C ₃interference, compare Cell ₃to C ₂and C ₃interference, if Cell ₃to C ₂interference be less than C ₃interference, and C ₂in do not have and Cell ₃belong to the community of same base station, then by Cell ₃add C ₂.Cell ₄to C ₂interference maximum, compare Cell ₄to C ₁and C ₃interference, if Cell ₄to C ₁interference be less than C ₃interference, and C ₁in do not have and Cell ₄belong to the community of same base station, then by Cell ₄add C ₁.

Implementation C2:

For each group is determined that one is disturbed maximum ungrouped community to it respectively; Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with this community; Repeat above-mentioned steps until added in group all ungrouped communities.

Suppose have three to organize C ₁, C ₂and C ₃, have 4 non-packet cell Cell ₁, Cell ₂, Cell ₃and Cell ₄.To C ₁maximum community is disturbed to be Cell ₁, to C ₂maximum community is disturbed to be Cell ₂, to C ₃maximum community is disturbed to be Cell ₃, compare Cell ₁to C ₂and C ₃interference, if Cell ₁to C ₂interference be less than C ₃interference, and C ₂in do not have and Cell ₁belong to the community of same base station, then by Cell ₁add C ₂, compare Cell ₂to C ₁and C ₃interference, if Cell ₂to C ₁interference be less than C ₃interference, and C ₁in do not have and Cell ₂belong to the community of same base station, then by Cell ₂add C ₁, compare Cell ₃to C ₁and C ₂interference, if Cell ₃to C ₂interference be less than C ₁interference, and C ₂in do not have and Cell ₃belong to the community of same base station, then by Cell ₃add C ₂.Cell ₄to C ₂interference maximum, compare Cell ₄to C ₁and C ₃interference, if Cell ₄to C ₁interference be less than C ₃interference, and C ₁in do not have and Cell ₄belong to the community of same base station, then by Cell ₄add C ₁.

It should be pointed out that and can coordinate enforcement between each implementation above-mentioned.Implement if implementation A1 and B1 coordinates, then only need the interference adjacent area determining a community.

Based on above-mentioned any means embodiment, the implementation of above-mentioned steps 110 can but be not limited only to be:

Within the scope of the working frequency range allowed, choose N number of working frequency range (comprise center frequency point and bandwidth, the center frequency point of each working frequency range is not identical), an each group of corresponding working frequency range, preferably, this N number of working frequency range is not overlapping;

For cell configuration working frequency range: the working frequency range that the cell configuration in group is identical, the working frequency range that the cell configuration between group is different;

To frequency and the bandwidth information of transmission community, base station, so that the community under base station uses frequency and the bandwidth operation of configuration.

In each embodiment above-mentioned, before for cell allocation working frequency range, community is not also opened, but can distinguish each community by the identification information of community.The identification information of community can be that base station reports to during Centroid request working frequency range, also can be centralized node is base station assigns.

Based on above-mentioned any means embodiment, when having new community, calculate the interference that this new community is organized each; Being added this new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community; For the cell allocation working frequency range that this is new, this working frequency range and this new community to add the center frequency point of other communities in group identical.

Based on above-mentioned any means embodiment, when having community closedown or load to reduce, search respectively in each group and be subject to organizing the maximum community of interior interference; Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined; The working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

Preferably, repeat the set-up procedure of above-mentioned cell group, until the community number carrying out dividing into groups to adjust reaches predetermined value.

Community is closed or cell load reduces, and shows that presence of intercell interference reduces, and resource is had more than needed, and can adjust, its specific implementation can be:

Step 1, centralized node travel through N number of group, and to the interference that each group of calculating group small area is subject to, specific formula for calculation is as follows:

$I\left({\mathrm{Cell}}_{n,i}\right)=\underset{{\mathrm{Cell}}_j\∈C_n,j\≠i}{\mathrm{\Σ}}{w}_{j,i}$

Wherein, I (Cell _n,i) be C _ninterior community Cell _n,ithe interference be subject to;

C _nfor the set of cells in group n, n=1,2 ..., N;

W _k,jfor Cell _jto Cell _n,iinterference value, can be the measured value of measuring amount, also can be interference calculation value, Cell _jfor C _nin community.

It should be pointed out that at calculating C _ninterior community Cell _n,iduring the interference be subject to, also can be calculate C _ninterior Cell _jeach interference sum of being subject to of interference adjacent area.

The community Cell that step 2, centralized node find one to be interfered maximum to each group _nas community to be adjusted, n=1,2 ..., N, optionally, Cell _nload exceed thresholding;

Step 3, centralized node find the community Cell being interfered maximum in community to be adjusted _max;

Step 4, centralized node calculate Cell _maxto the interference of other N-1 groups, find the group C that interference is minimum _min, and C _minin do not have and Cell _maxthe community of same home base station;

Step 5, centralized node calculate Cell _maxat C _minin the interference that is subject to, if the interference be subject to before being less than, so centralized node is by Cell _maxadjust to C _minin, and be its adjustment working frequency range, otherwise redirect performs step 3, until N number of community to be adjusted is all traversed.

Optionally, centralized node performs step 1 ~ 5, until the community number of adjustment meets preset value M.

Generally, the community number of adjustment is unsuitable excessive, because a community worked to be carried out the adjustment of working frequency range, the service UE under Hui Dui community has impact.

The impact of following methods reduction on service UE can be adopted:

UE is reshuffled (comprising the working frequency range after the adjustment of community), appoints the time of onset, ensure that UE continues after the adjustment of community serviced;

UE is switched to other communities;

If UE is in carrier aggregation state, by the mode of SCell deexcitation/activation, can ensure that community adjusting stage UE is not serviced, continue serviced after adjustment.

Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of Inter-Cell Interference Coordination device, and as shown in Figure 2, this device comprises:

Cell group module 201, for being divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group;

Working frequency range distribution module 202, for being respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

Preferably, identical with group community institute assignment frequency range.

Preferably, described cell group module specifically for:

Determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group;

Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group;

Each community ungrouped is added respectively and disturbs in minimum group by it.

Preferably, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

The community calculating each base station is interfered the interference of adjacent area;

According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

The community calculating each base station is subject to the interference of other communities;

According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

Preferably, find when maximum community disturbed to non-NULL group in ungrouped community, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group;

Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, find when maximum community disturbed to non-NULL group in ungrouped community, described cell group module specifically for:

Calculate the interference of ungrouped community to the community in non-NULL group;

Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

Preferably, each community ungrouped is added respectively when disturbing in minimum group by it, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Preferably, each community ungrouped is added respectively when disturbing in minimum group by it, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

Preferably, when having new community:

Described cell group module also for, calculate the interference that described new community is organized each; Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community;

Described working frequency range distribution module also for, be described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.

Preferably, when having community closedown or load to reduce:

Described cell group module also for, search respectively in each group and be subject to organizing the maximum community of interior interference; Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined;

Described working frequency range distribution module also for, the working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

Preferably, repeat the set-up procedure of above-mentioned cell group and working frequency range, until the community number carrying out dividing into groups to adjust reaches predetermined value.

Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, as shown in Figure 3, comprising:

Processor 301, this processor 301 is configured to perform the computer program possessing following function: divided into groups the community of each base station, and wherein, the community of mutual interference in allowed band is divided into one group; Be respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different;

Memory 302, this memory 302 is configured to the code preserving above computer program.

The technical scheme that the embodiment of the present invention provides is applicable to OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) LTE system of technology, be equally applicable to other wireless communication systems that many base station networkings may cause co-channel interference.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (24)

1. an inter-cell interference coordination method, is characterized in that, comprising:

Divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group;

Be respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

2. method according to claim 1, is characterized in that, identical with group community institute assignment frequency range.

3. method according to claim 1 and 2, is characterized in that, is divided into groups the community of each base station, comprising:

Determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group;

Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group;

Each community ungrouped is added respectively and disturbs in minimum group by it.

4. method according to claim 3, is characterized in that, determines to comprise the community that the interference that is subject in the community of each base station is maximum:

Determine the interference adjacent area of the community of each base station;

The community calculating each base station is interfered the interference of adjacent area;

According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

5. method according to claim 3, is characterized in that, determines to comprise the community that the interference that is subject in the community of each base station is maximum:

The community calculating each base station is subject to the interference of other communities;

According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

6. method according to claim 3, is characterized in that, finds and disturbs maximum community to non-NULL group, comprising in ungrouped community:

Determine the interference adjacent area of the community of each base station;

Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group;

Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

7. method according to claim 3, is characterized in that, finds and disturbs maximum community to non-NULL group, comprising in ungrouped community:

Calculate the interference of ungrouped community to the community in non-NULL group;

Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

8. method according to claim 3, is characterized in that, is added respectively each community ungrouped and disturbs in minimum group by it, comprising:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

9. to go the method described in 3 according to right, it is characterized in that, each community ungrouped be added respectively and disturbs in minimum group by it, comprising:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

10. method according to claim 1 and 2, is characterized in that, when having new community, the method also comprises:

Calculate the interference that described new community is organized each;

Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community;

For described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.

11. methods according to claim 1 and 2, is characterized in that, when having community closedown or load to reduce, the method also comprises:

Search respectively in each group and be subject to organizing the maximum community of interior interference;

Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined;

The working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

12. methods according to claim 11, is characterized in that, repeat the set-up procedure of above-mentioned cell group, until the community number carrying out dividing into groups to adjust reaches predetermined value.

13. 1 kinds of Inter-Cell Interference Coordination devices, is characterized in that, comprising:

Cell group module, for being divided into groups the community of each base station, wherein, the community of mutual interference in allowed band is divided into one group;

Working frequency range distribution module, for being respectively each group of cell allocation working frequency range, wherein, the center frequency point with group community institute assignment frequency range is identical, and the center frequency point of different group community institutes assignment frequency range is different.

14. devices according to claim 13, is characterized in that, identical with group community institute assignment frequency range.

15. devices according to claim 13 or 14, is characterized in that, described cell group module specifically for:

Determine the community that the interference that is subject in the community of each base station is maximum, and community maximum for the described interference be subject to is added a group;

Find in ungrouped community and maximum community is disturbed to non-NULL group, and the community found is added one empty group, until all Zu Junyou communities add; Be the interference sum to each community in described non-NULL group to the interference of non-NULL group;

Each community ungrouped is added respectively and disturbs in minimum group by it.

16. devices according to claim 15, is characterized in that, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

The community calculating each base station is interfered the interference of adjacent area;

According to the interference of the adjacent area that is interfered, from the community of each base station, determine the community that the interference that is subject to is maximum.

17. devices according to claim 15, is characterized in that, when determining the maximum community of the interference that is subject in the community of each base station, described cell group module specifically for:

The community calculating each base station is subject to the interference of other communities;

According to the interference being subject to other communities, from the community of each base station, determine the community that the interference that is subject to is maximum.

18. devices according to claim 15, is characterized in that, find when disturbing maximum community to non-NULL group in ungrouped community, described cell group module specifically for:

Determine the interference adjacent area of the community of each base station;

Calculate the interference of ungrouped community to the interference adjacent area in non-NULL group;

Find in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

19. devices according to claim 15, is characterized in that, find when disturbing maximum community to non-NULL group in ungrouped community, described cell group module specifically for:

Calculate the interference of ungrouped community to the community in non-NULL group;

Search in ungrouped community according to result of calculation and maximum community is disturbed to non-NULL group.

20. devices according to claim 15, is characterized in that, are added each community ungrouped when disturbing in minimum group by it respectively, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Add wherein disturbing maximum community and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

21. will remove the device described in 15 according to right, it is characterized in that, are added each community ungrouped when disturbing in minimum group by it respectively, described cell group module specifically for:

For each group is determined that one is disturbed maximum ungrouped community to it respectively;

Added the community determined respectively and disturb minimum target group by it, the target group of community is do not comprise the group belonging to same base station with described community;

Repeat above-mentioned steps until added in group all ungrouped communities.

22. devices according to claim 13 or 14, is characterized in that, when having new community:

Described cell group module also for, calculate the interference that described new community is organized each; Being added described new community disturbs in minimum target group by it, and the target group of community is do not comprise the group belonging to same base station with described community;

Described working frequency range distribution module also for, be described new cell allocation working frequency range, described working frequency range and described new community to add the center frequency point of other communities in group identical.

23. devices according to claim 13 or 14, is characterized in that, have community to close or load reduces time:

Described cell group module also for, search respectively in each group and be subject to organizing the maximum community of interior interference; Determine the target group that the interference of the community found is minimum successively, the target group of community is do not comprise the group belonging to same base station with described community, until the interference having the community found to be subject in the target group determined is less than the interference be subject in former group, the described community found is adjusted to the target group determined;

Described working frequency range distribution module also for, the working frequency range of the community found described in adjustment, the center frequency point of described working frequency range is identical with the center frequency point of other communities in the group that the described community found is adjusted to.

24. devices according to claim 23, is characterized in that, repeat the set-up procedure of above-mentioned cell group and working frequency range, until the community number carrying out dividing into groups to adjust reaches predetermined value.