CN102857929A - Interference coordinating method of sectorized common-frequency networking communication system - Google Patents
Interference coordinating method of sectorized common-frequency networking communication system Download PDFInfo
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Abstract
An embodiment of the invention discloses an interference coordinating method of a sectorized common-frequency networking communication system. The method includes: dividing up a forbidden frequency band and an edge frequency band for a cell from all frequency bands; classifying users into cell edge users, sector edge users, cell and sector edge users and center users according to measurement information reported by the users; and allowing to allocate a forbidden frequency band of a neighboring cell and the edge frequency band of the cell as for the cell edge users, the sector edge users and the cell and sector edge users, and preferentially allocating the forbidden frequency band of the neighboring cell prior to allocating the edge frequency band of the cell. According to the method, high frequency band utilization ratio can be guaranteed while good interference suppression effects are obtained.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of disturbance coordination method of sectorization identical networking communication system.
Background technology
In the present communication system, according to different network construction forms, can be divided into identical networking and inter-frequency networking; Under the inter-frequency networking, use different frequency bands between the different neighbor cells, can not produce presence of intercell interference, or only has very little presence of intercell interference (from the interference signal of non-adjacent farther residential quarter), but shortcoming is 1/3 or 1/N that each residential quarter available bandwidth becomes the whole system available bandwidth, generally speaking, although disturb the mode that suppresses simpler, entire throughput still is affected; And for identical networking, can use whole system bandwidths between the neighbor cell, band efficiency is far above inter-frequency networking, but presence of intercell interference can become the key factor that affects entire throughput; Special in the cellular radio Communication system based on the OFDM technology, the user realizes the quadrature of signal in the residential quarter by frequency division multiplexing, to solve the problem of disturbing in the residential quarter.But as cost, identical networking can bring stronger presence of intercell interference.Therefore how to reduce presence of intercell interference, become an important subject of wireless communication system.So, in order to guarantee the frequency spectrum efficiency of transmission, improve user performance in the residential quarter, the communication system of identical networking all needs to adopt interference coordination technique to suppress presence of intercell interference.
Mostly existing interference coordination technique is to disturb inhibition by channeling.Static interference coordinate scheme commonly used mainly contains FFR (partial frequency multiplexing) and SFR (soft-frequency reuse).The principle of FFR algorithm is that residential quarter forbidding frequency band is set, and avoids occuring between the Cell Edge User phase mutual interference for Cell Edge User distributes the forbidding frequency band of adjacent cell; The SFR algorithm principle is to distribute different frequencies and power to avoid occuring between the Cell Edge User phase mutual interference by the edge customer for neighbor cell.Existing simulation result and document demonstration, the static interference coordinate scheme can improve the performance of Cell Edge User to a certain extent.
But, in identical networking, according to different antenna forms, can be further divided into again omnidirectional's co-frequency cell networking of using omnidirectional antenna and the sectorization identical networking that uses directional antenna.The sectorization identical networking can obtain higher antenna gain owing to having used directional antenna, can increase the residential quarter coverage distance, can improve cell capacity again, thereby become the main networking mode of wireless communication system in the city.
The cell structure of existing exemplary sector identical networking communication system as shown in Figure 1, the coverage of each base station (launching tower pattern) is regular hexagon zone, each regular hexagon zone is divided into 3 sectors with dotted line and (spends directional antennas as example take 120 among Fig. 1, both each base station was divided into 3 sectors, if 60 degree directional antennas then are 6 sectors, 180 degree directional antennas then are 2 sectors, by that analogy).
Unified with for simplicity in order to describe, hereinafter the sector is also referred to as the residential quarter, a plurality of sectors of dividing under the same base station are called residential quarter, common location (in Fig. 1, residential quarter 1,4,5 is for being total to the residential quarter, location), the adjacent altogether interference of minizone, location is called common location and disturbs, the sector different from base station under certain sector is called the non-altogether residential quarter, location (in Fig. 1, residential quarter 2,3 is the non-altogether residential quarter, location of residential quarter 1) of this sector.
In Fig. 1 system, for each sector, respectively have and overlap independently running time-frequency resource, the directive gain by antenna suppresses with the interference between the sector, location.And in order to guarantee continuous covering, the sector intersection still has certain antenna gain, and the interference between a plurality of sectors under the same base just can not be effectively suppressed like this.During these disturb, be positioned at cell edge, from this cell base station away from, from adjacent non-co-siting base stations close to the user of (such as the A point), this part user is larger to the interference of non-altogether location adjacent cell, and the interference that self is subject to the non-altogether edge customer of location adjacent cell simultaneously is also larger; And the edge customer of common location neighbor cell, if from the base station close to, be in center of housing estate (such as the B point), then its common location to adjacent altogether residential quarter, location is disturbed also larger, particularly to the having the greatest impact of the Cell Edge User of adjacent altogether residential quarter, location because this moment path loss to the decline of signal much smaller than the decay of directional antenna to signal; At last, be total to the sector-edge user of location neighbor cell, if from the base station away from (such as the C point), or from two adjacent non-altogether location cell edges all close to and away from this cell base station (such as the E point), or from two adjacent common location cell edges all close to and from this cell base station also close to (such as the F point), such user may be subject to simultaneously a plurality of adjacent cells or be subject to simultaneously common location adjacent cell and the interference of non-altogether location adjacent cell.
For above-mentioned this sectorization identical networking communication system, because what existing SFR and FFR algorithm mainly solved is the non-altogether interference problem between the residential quarter, location, therefore in the sectorization identical networking situation, interference between the residential quarter, location does not provide special processing mode altogether, that is to say, in existing SFR and FFR algorithm, only there are two kinds of classification of edge customer and central user, for from the closer sector-edge user of this cell base station (such as B point user), when judging user type, according to existing user's mode classification, this part user may be judged to be central user (such as D point user), make this part user can't obtain interference suppressioning effect.
Although also can be with this part user by unified user's screening rule, classify as edge customer, unify according to edge customer (such as the A point, C point user) processes, make this part user can access interference suppressioning effect, but in fact, this part user from this cell base station close to, only other residential quarters under the co-siting base stations are produced and disturb, and the user of non-co-siting base stations residential quarter is disturbed not quite, when adopting the SFR algorithm, if this part user and edge customer can not be distinguished, and be its allocations of edge frequency band, then both there is no need, also reduced the frequency band transmission efficient (bps/Hz) of edge customer, because the user of transmitting on the limited frequency band is more, the speed that each user can average transmission so is just lower; Like this, can't carry out targetedly bandwidth assignment for user's interference characteristics, also just reduce whole band efficiency.
When adopting the FFR algorithm, similarly, if it is processed as edge customer, then too much edge customer makes each residential quarter need to mark off more forbidding frequency band could to satisfy the communication quality requirement, and this moment is because the forbidding frequency band too much also can cause band efficiency to descend.
In addition, although the whole band efficiency of the relative FFR of SFR is higher, but do not eliminate the interference between the neighbor cell fully, just avoided the heaviest interference between the neighbor cell, still have the less interference between the central user of Cell Edge User and adjacent cell, interference suppressioning effect is more inferior than FFR.In addition, the division of FFR edge frequency band is more flexible, even under the static frequency configuration, also can divide the edge band that surpasses whole system bandwidth 1/3 for edge customer, and SFR can only divide the edge band that can not surpass whole system bandwidth 1/3 for edge customer at most.
In a word, existing interference coordination technique can't be taken into account on the technical indicators such as interference suppressioning effect, band efficiency, frequency band division flexibility simultaneously, can only attend to one thing and lose sight of another.
Summary of the invention
In view of this, the invention provides a kind of disturbance coordination method of sectorization identical networking communication system, can obtain simultaneously preferably interference suppressioning effect in the situation that guarantee the high frequency band utilance.
For reaching above-mentioned purpose, technical scheme of the present invention specifically is achieved in that
A kind of disturbance coordination method of sectorization identical networking communication system, the method comprises:
From whole frequency bands, mark off in advance forbidding frequency band and the edge band of residential quarter;
Metrical information according to reporting of user is categorized as the user: from this cell base station with altogether away from the cell edge of location, and the Cell Edge User close to some non-altogether location cell edges; From this cell base station with altogether close to the cell edge of location, the sector-edge user away from some non-altogether location cell edges; Close to common location cell edge and non-altogether location cell edge and away from this cell base station, or from two adjacent non-altogether location cell edges all close to and away from this cell base station, or from two adjacent common location cell edges all close to and residential quarter and sector-edge user close to this cell base station; And, the central user beyond the above situation;
For Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution;
Allow to distribute whole frequency bands for central user.
Preferably, forbidding frequency band and the edge band of described in advance division of cells comprise:
Between the forbidding frequency band of neighbor cell common factor is arranged in twos, and do not have common subset between all forbidding frequency bands;
Between the edge band of neighbor cell, between the edge band of same residential quarter and the forbidding frequency band, all there is not common subset between the forbidding frequency band of this utilizing cell edge frequency band and neighbor cell.
Preferably, the method further comprises:
, further classified in corresponding its nearest non-altogether residential quarter, location of Cell Edge User from the non-altogether far and near degree of residential quarter, location of a plurality of differences according to the user;
Be total to the far and near degree of residential quarter, location according to the user from a plurality of differences, further classified in corresponding its nearest residential quarter, common location of sector-edge user.
Preferably, the method further comprises:
According to being disturbed degree, described Cell Edge User is further divided into interference greatly and disturbs less two classes;
According to being disturbed degree, described sector-edge user is further divided into interference greatly and disturbs less two classes;
According to being disturbed degree, described residential quarter and sector-edge user are further divided into interference greatly and disturb less two classes.
Preferably, described for Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution comprises:
For residential quarter and sector-edge user, allow to distribute common factor and this utilizing cell edge frequency band of its adjacent cell forbidding frequency band, and the common factor of its adjacent cell forbidding frequency band of priority allocation;
For Cell Edge User and sector-edge user, allow to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter, and this utilizing cell edge frequency band; And remove the part that common factor is arranged with this residential quarter in its nearest adjacent cell forbidding frequency band of priority allocation.
Preferably, described for Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution comprises:
For residential quarter and sector-edge user, allow to distribute common factor and this utilizing cell edge frequency band of its adjacent cell forbidding frequency band; Wherein, disturb larger user priority to distribute the common factor of its adjacent cell forbidding frequency band; Disturb less user priority to distribute the edge band of this residential quarter;
For Cell Edge User and sector-edge user, allow to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter, and this utilizing cell edge frequency band; Wherein, disturb larger user priority to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter; Disturb less user priority to distribute the edge band of this residential quarter.
Preferably, described metrical information comprises: Reference Signal Received Power RSRP.
Preferably, described metrical information according to reporting of user comprises user's classification:
The RSRP that reaches each adjacent cell to this residential quarter according to reporting of user calculates pilot to powerratio PPR or the interference power Pinter that the user arrives this residential quarter and arrives each adjacent cell, according to default PPR thresholding or interference power Pinter the user is classified.
As seen from the above technical solution, the disturbance coordination method of this sectorization identical networking communication system of the present invention, by on the frequency band division basis of FFR, the frequency band division of SFR has superposeed, and simultaneously by Cell Edge User is divided into groups by the disturbed condition that is subject to, make the large user of the degree of being interfered organize the forbidding frequency band of priority allocation FFR, the edge band of user's set of dispense SFR that the degree that is interfered is slightly little; Can reduce the size of residential quarter forbidding frequency band under the identical like this Cell Edge User load, in the situation that the reduce disturbance degree has improved again band efficiency simultaneously as far as possible, both avoid the shortcoming of FFR and SFR, effectively give play to again advantage separately.
Description of drawings
Fig. 1 is existing exemplary sector identical networking communication system cell structural representation.
Fig. 2 is that the subdistrict frequency band of the embodiment of the invention is divided schematic diagram.
Fig. 3 is that user's available band of the embodiment of the invention is distributed schematic diagram.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The present invention mainly is on the frequency band division basis of partial frequency multiplexing technology, the frequency band division of soft-frequency reuse has superposeed, and simultaneously the user is divided into groups according to annoyance level, user's component of the degree that is interfered maximum is to the forbidding frequency band of partial frequency multiplexing, and user's component that the degree that is interfered is slightly little arrives the edge band of soft-frequency reuse; Can reduce the size of residential quarter forbidding frequency band under the identical like this Cell Edge User load, in the situation that the reduce disturbance degree has improved again band efficiency simultaneously as far as possible, both avoid the shortcoming of partial frequency multiplexing and soft-frequency reuse, effectively given play to again advantage separately.
Particularly, the improvement of disturbance coordination method of the present invention is mainly in frequency band division, user classification with specifically to aspect three of the bandwidth assignment of different user, below gives an example respectively.
One, frequency band division
Take the networking mode of Fig. 1 as example, in the present invention, the division of frequency band as shown in Figure 2, Ω is available total frequency band of whole system; 1,2,3 is respectively sector0, sector1, sector2, three forbidding frequency bands that are total to the residential quarter, location; A, B, C are respectively sector0, sector1, sector2, three edge bands that are total to the residential quarter, location;
Wherein, need to satisfy following relation between each residential quarter forbidding frequency band and edge band:
Between each residential quarter forbidding frequency band common factor is arranged in twos, namely
There is not common subset between all forbidding frequency bands, namely
Between the edge band of each residential quarter, edge band and this residential quarter and and the forbidding frequency band of adjacent cell between all do not have common subset, namely
Can find out, with the frequency band division method shown in Fig. 2, when the edge customer of each residential quarter used the forbidding frequency band of neighbor cell, the frequency band pairwise orthogonal staggered; When the edge customer of each residential quarter used the edge band of residential quarter self, frequency band also was that pairwise orthogonal staggers; Simultaneously, it also is mutually orthogonal staggering between the forbidding frequency band that the edge band of each residential quarter and each Cell Edge User use; Like this, as long as edge customer is distributed in the forbidding frequency band of adjacent cell or any one frequency of edge band, all the edge customer with adjacent cell is that quadrature staggers in the frequency band use; Difference is, if user assignment on the forbidding frequency band of adjacent cell, does not have to disturb or only exist very little interference so mutually between this user and the adjacent cell; And if user assignment is on the edge band of this residential quarter, the former is slightly large for the interference ratio between this user and the adjacent cell so, but still belongs to less interference; But both common ground are not have the phase mutual interference between the strong interferers between the neighbor cell, have arrived to suppress preferably the purpose disturbed.
According to frequency band static division or dynamically division, above-mentioned edge band and forbidding frequency band can carry out the bandwidth of different proportion size and divide; For static division, edge band accounts at most system bandwidth 1/3, and (this is limiting case, is pure soft-frequency reuse, the forbidding frequency band is empty), the forbidding frequency band accounts at most system bandwidth 1/2 (this is pure partial frequency multiplexing for another limiting case, and edge band is empty); For dynamic division, then can carry out adaptive distribution according to concrete cell edge and sector-edge user loading condition, bandwidth changes more flexible, as long as guarantee quadrature between edge band, the forbidding frequency band, does not launch to describe at this.
Two, user's classification
The user is after start, and the regular report measurement information of meeting among the present invention, can be classified to the user by the metrical information of reporting of user.
Equally take the networking mode of Fig. 1 as example, according to the metrical information of reporting of user, the user can be divided into following large class:
From this cell base station with altogether away from the cell edge of location, the Cell Edge User close to some non-altogether location cell edges; From this cell base station with altogether close to the cell edge of location, the sector-edge user away from some non-altogether location cell edges; Close to common location cell edge and non-altogether location cell edge and away from this cell base station, or from two adjacent non-altogether location cell edges all close to and away from this cell base station, or from two adjacent common location cell edges all close to and residential quarter and sector-edge user close to this cell base station; And, the central user beyond the above situation.
In addition, because under the networking mode of Fig. 1, there are two different adjacent altogether residential quarters, location (such as the residential quarter, common location 4,5 of Fig. 1 small area 1) each residential quarter, two different adjacent non-altogether residential quarters, location (such as the non-altogether residential quarter, location 2,3 of Fig. 1 small area 1) are also arranged so for Cell Edge User and sector-edge user, can also according to the user from the non-altogether far and near degree of residential quarter, location of a plurality of differences, Cell Edge User further be classified corresponding its nearest non-altogether residential quarter, location of Cell Edge User; As be categorized as Cell Edge User 1 and Cell Edge User 2, respectively in the respective cell 1, with residential quarter 2,3 nearest Cell Edge User.
In like manner, also can be total to according to the user the far and near degree of residential quarter, location from a plurality of differences, further be classified in corresponding its nearest residential quarter, common location of sector-edge user; As be categorized as sector-edge user 1 and sector-edge user 2, respectively in the respective cell 1, with residential quarter 4,5 nearest sector-edge user.
Carry out the classify metrical information of institute's foundation of user, can decide as the case may be, as long as can reflect the position relationship between user and this cell base station, the neighbor cell, relatively typical as: Reference Signal Received Power (RSRP), RSRP is that terminal is measured, the user can measure a RSRP to each adjacent cell, and reports the base station, and can classify this moment according to this metrical information.
Certainly, RSRP is not the direct basis that the user classifies, and need to be converted to other parameter, and concrete example is as follows:
(A) distinguish the user according to pilot to powerratio PPR
Each user is calculated to the PPR (PPR (i)=RSRP of each adjacent cell in the base station
Target(i)-RSRP
Source(i)), wherein, RSRP
TargetBe the RSRP of user to target serving district, RSRP
Source, be the RSRP of user to this residential quarter; The user that the i representative is different.
By setting suitable PPR thresholding, comparison according to user's PPR and this thresholding, and the PPR of relative each adjacent cell of user and the comparison of this thresholding, the user can be categorized into above-mentioned a few class, as PPR larger centered by the user, secondly be sector-edge user, less is Cell Edge User, specifically relatively the PPR of which residential quarter is less according to the user, can further distinguish the user from which residential quarter more close to, thereby sector-edge user and Cell Edge User are further distinguished.
Concrete PPR thresholding can be determined by emulation and the debugging of actual field testing.
(B) distinguish the user according to interference power Pinter
Each user is calculated to the PPR of each adjacent cell in the base station, and this user is to the uplink receiving power P recv of this cell base station.Calculate the user to the interference power Pinter=Precv-PPR of each adjacent area;
By setting suitable Pinter thresholding, comparison according to user's Pinter and this thresholding, and the Pinter of relative each adjacent cell of user and the comparison of this thresholding, the user can be categorized into above-mentioned a few class, as Pinter larger centered by the user, secondly be sector-edge user, less is Cell Edge User, specifically the Pinter according to relative which residential quarter of user is less, can further distinguish the user from which residential quarter more close to, thereby sector-edge user and Cell Edge User are further distinguished.
Need to prove, just lifted two kinds of methods of dividing the user here, also can distinguish user type with other method.
Three, user's bandwidth assignment
To disturb in order maximizing to reduce, reasonably to distribute different frequency bands according to user's type, in the present invention bandwidth assignment is had following principle:
1) cell edge, sector-edge user, residential quarter and sector-edge user can be used the forbidding frequency band of adjacent cell and the edge band of this residential quarter.
2) allocation rule of specifically forbidding frequency band can be used the forbidding frequency band of adjacent cell still with reference to the rule of existing FFR such as Cell Edge User, cell edge and sector-edge user are used the common factor of the forbidding frequency band of two neighbor cells.
3) central user can be used the Whole frequency band bandwidth.
4) the forbidding frequency band of preferentially using adjacent cell for the maximum edge customer that is interfered just uses the edge band of this residential quarter when the forbidding frequency band is finished; Because the interference that is subject to of transmission is minimum on the forbidding frequency band, on the edge band secondly.
5) as possible, when making the resource of each edge customer distribution, preferentially use adjacent area forbidding frequency band as far as possible, next uses this utilizing cell edge frequency band.
Like this, have following two kinds of allocative decisions roughly on the concrete bandwidth assignment at least:
Scheme one: because the size of radius of society, sectorization directional antenna secondary lobe are different with dorsad signal attenuation degree, the interference size of the interference of residential quarter, location and non-altogether residential quarter, location also may be different altogether, the interference that might be total to the generation of residential quarter, location is larger, and the interference that also might non-ly be total to the generation of residential quarter, location is larger; Therefore Cell Edge User, sector-edge user, between residential quarter and the sector-edge user, it is not certain which kind of edge customer disturbs maximum, so at this moment, can be according to equipment and the networking situation of reality, determine Cell Edge User, sector-edge user, which kind of is that interference is large among residential quarter and the sector-edge user, and which kind of disturbs slightly little; Thereby adjacent cell is forbidden the frequency band priority allocation to being disturbed large edge customer, this utilizing cell edge frequency band priority allocation is given disturb slightly little edge customer; If but frequency band separately in use also has residue, the edge customer that so also can distribute to other classes uses.
Scheme two: the annoyance level of interference source and interference source have very large relation apart from far and near degree and the aerial angle of this residential quarter, in non-altogether location adjacent cell with all have altogether strong jamming and the difference of weak interference slightly in the interference source of location adjacent cell; So, can be in Cell Edge User, sector-edge user, further distinguish in residential quarter and the sector-edge user than strong interferers with than two user classs in weak jamming source, preferentially allow and disturb stronger user to use adjacent cell forbidding frequency band, allow and disturb slightly weak user to use this utilizing cell edge frequency band; The thresholding that concrete grammar can be further divided into two grades for PPR thresholding or the interference power thresholding with above-mentioned differentiation edge customer carries out the differentiation of annoyance level according to this.
Fig. 3 is that user's available band of the embodiment of the invention is distributed schematic diagram, and among this figure, the division of subdistrict frequency band is identical with Fig. 2, and 1,2,3 are respectively sector0, sector1, sector2, three forbidding frequency bands that are total to the residential quarter, location; A, B, C are respectively sector0, sector1, sector2, three edge bands that are total to the residential quarter, location.Wherein, establish 1 ', 2 ', 3 ' the residue frequency band that represents respectively after all parts of occuring simultaneously of 1,2,3 deductions;
12The common factor frequency band of expression 1,2, the common factor frequency band of 23 expressions 2,3, the rest may be inferred; Xy represents the union of X, Y common factor frequency band and X ' frequency band, such as 1
2The union that the common factor frequency band of expression 1,2 and 1 ' frequency band form (being equivalent to 1 frequency band gets rid of and 2 parts of occuring simultaneously), the rest may be inferred.
Be expressed as J+K such as frequency band, but represent this user's service band J and frequency band K.
As follows to two kinds of allocative decision concrete examples according to Fig. 3, extremely must be that Cell Edge User is forbidden frequency band with the adjacent area for scheme once not limiting, this utilizing cell edge frequency band of sector-edge user.And second more flexible to scheme, can be according to the not concrete Resources allocation in user's disturbance source region.
Illustrate, if operational version one for sector 0 (sector0), is in left lower side and top right-hand side away from the zone (being residential quarter and sector-edge user) of this cell base station, can use the common factor (frequency band of two adjacent cells forbidding frequency band
23) and the edge band (A) of this residential quarter, preferentially use the common factor (frequency band of two adjacent cells forbidding frequency band
23).The user's (being Cell Edge User) who is in right hypotenuse and lower edge regions can use respectively the forbidding frequency band of the adjacent cell nearest with it, and (right hypotenuse is near sector2, therefore the user can use in the forbidding frequency band of sector2 and get rid of the part of occuring simultaneously with this residential quarter forbidding frequency band, and namely frequency band 3
2In like manner, following near sector1, so the user can use in the forbidding frequency band of sector1 and get rid of the part of occuring simultaneously with this residential quarter forbidding frequency band, namely frequency band 2
3) and the edge band (A) of this residential quarter, preferentially use the forbidding frequency band (A) of adjacent cell.And the user's (sector-edge user) who is in close this cell base station zone of left hypotenuse and top can use respectively the edge band (A) of this residential quarter and the forbidding frequency band of neighbor cell (left hypotenuse user service band 3
2, top user's service band 2
3), preferentially use the forbidding frequency band (A) of adjacent cell.The bandwidth assignment rule that other sector zones of different user uses is identical, repeats no more here.
If operational version two, then at Cell Edge User, in sector-edge user residential quarter and the sector-edge user, size according to annoyance level continues to be divided into the large edge customer of annoyance level and the little edge customer of annoyance level, as adopt the PPR method to divide the user, then except the PPR thresholding of dividing edge customer, set again a PPR annoyance level thresholding less than above-mentioned PPR thresholding, edge customer less than this thresholding is the large edge customer of annoyance level, edge customer greater than this thresholding is the little edge customer of annoyance level, if and adopt the user classification method of interference power, then equally except setting the interference power thresholding of distinguishing edge customer, set again the annoyance level thresholding larger than above-mentioned interference power thresholding, edge customer greater than this thresholding is the large edge customer of annoyance level, is the little edge customer of annoyance level less than the edge customer of this thresholding.
Divide timing in resource, then scheme 2 relative plans 1 are more clear and definite and careful, its main distribution method is identical with such scheme 1, just dividing timing according to annoyance level, divide matched adjacent zone forbidding frequency band for the large user priority of annoyance level, and then distribute to the little user of annoyance level, the user assignment that annoyance level is little is larger to the probability of the edge band of this residential quarter.
Above-described embodiment all is that the networking situation that has been divided into 3 sectors under each base station is example, the networking situation of dividing for other sectors such as 2,6, the method of concrete frequency band division, user's classification, bandwidth assignment is similarly, has just given an example no longer one by one here.
By the above embodiments as seen, the disturbance coordination method of this sectorization identical networking communication system of the present invention, by on the frequency band division basis of FFR, the frequency band division of SFR has superposeed, and simultaneously by Cell Edge User is divided into groups by the disturbed condition that is subject to, make the large user of the degree of being interfered organize the forbidding frequency band of priority allocation FFR, the edge band of user's set of dispense SFR that the degree that is interfered is slightly little; Can reduce the size of residential quarter forbidding frequency band under the identical like this Cell Edge User load, in the situation that the reduce disturbance degree has improved again band efficiency simultaneously as far as possible, both avoid the shortcoming of FFR and SFR, effectively give play to again advantage separately.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (8)
1. the disturbance coordination method of a sectorization identical networking communication system is characterized in that, the method comprises:
From whole frequency bands, mark off in advance forbidding frequency band and the edge band of residential quarter;
Metrical information according to reporting of user is categorized as the user: from this cell base station with altogether away from the cell edge of location, and the Cell Edge User close to some non-altogether location cell edges; From this cell base station with altogether close to the cell edge of location, the sector-edge user away from some non-altogether location cell edges; Close to common location cell edge and non-altogether location cell edge and away from this cell base station, or from two adjacent non-altogether location cell edges all close to and away from this cell base station, or from two adjacent common location cell edges all close to and residential quarter and sector-edge user close to this cell base station; And, the central user beyond the above situation;
For Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution;
Allow to distribute whole frequency bands for central user.
2. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 1 is characterized in that, forbidding frequency band and the edge band of described in advance division of cells comprise:
Between the forbidding frequency band of neighbor cell common factor is arranged in twos, and do not have common subset between all forbidding frequency bands;
Between the edge band of neighbor cell, between the edge band of same residential quarter and the forbidding frequency band, all there is not common subset between the forbidding frequency band of this utilizing cell edge frequency band and neighbor cell.
3. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 1 or 2 is characterized in that, the method further comprises:
, further classified in corresponding its nearest non-altogether residential quarter, location of Cell Edge User from the non-altogether far and near degree of residential quarter, location of a plurality of differences according to the user;
Be total to the far and near degree of residential quarter, location according to the user from a plurality of differences, further classified in corresponding its nearest residential quarter, common location of sector-edge user.
4. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 3 is characterized in that, the method further comprises:
According to being disturbed degree, described Cell Edge User is further divided into interference greatly and disturbs less two classes;
According to being disturbed degree, described sector-edge user is further divided into interference greatly and disturbs less two classes;
According to being disturbed degree, described residential quarter and sector-edge user are further divided into interference greatly and disturb less two classes.
5. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 3, it is characterized in that, described for Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution comprises:
For residential quarter and sector-edge user, allow to distribute common factor and this utilizing cell edge frequency band of its adjacent cell forbidding frequency band, and the common factor of its adjacent cell forbidding frequency band of priority allocation;
For Cell Edge User and sector-edge user, allow to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter, and this utilizing cell edge frequency band; And remove the part that common factor is arranged with this residential quarter in its nearest adjacent cell forbidding frequency band of priority allocation.
6. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 4, it is characterized in that, described for Cell Edge User, sector-edge user and residential quarter and sector-edge user, allow to distribute the forbidding frequency band of adjacent cell and the edge band of this residential quarter, and the forbidding frequency band of priority allocation adjacent cell, the edge band of its this residential quarter of sub-distribution comprises:
For residential quarter and sector-edge user, allow to distribute common factor and this utilizing cell edge frequency band of its adjacent cell forbidding frequency band; Wherein, disturb larger user priority to distribute the common factor of its adjacent cell forbidding frequency band; Disturb less user priority to distribute the edge band of this residential quarter;
For Cell Edge User and sector-edge user, allow to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter, and this utilizing cell edge frequency band; Wherein, disturb larger user priority to distribute in its nearest adjacent cell forbidding frequency band and remove the part that common factor is arranged with this residential quarter; Disturb less user priority to distribute the edge band of this residential quarter.
7. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 1 is characterized in that, described metrical information comprises: Reference Signal Received Power RSRP.
8. the disturbance coordination method of sectorization identical networking communication system as claimed in claim 7 is characterized in that, described metrical information according to reporting of user comprises user's classification:
The RSRP that reaches each adjacent cell to this residential quarter according to reporting of user calculates pilot to powerratio PPR or the interference power Pinter that the user arrives this residential quarter and arrives each adjacent cell, according to default PPR thresholding or interference power Pinter the user is classified.
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