CN103139780A - Method and device for coordinating inter-cell interference - Google Patents
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Abstract
The invention discloses a method and a device for coordinating inter-cell interference. The method comprises that a base station determines the position of a user according to a measurement report, wherein the position of the user comprises one of a cell center, a cell edge inside the base station and a cell edge between the base station and other base stations; the available frequency band is determined according to interference frequency band information from other base stations; and in the available frequency band, resources are allocated to the user according to the position of the user. By the aid of the method and the device, the effect of frequency-selecting scheduling can be improved, and the scheduling and the frequency division are flexible.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of inter-cell interference coordination method and device.
Background technology
In the LTE system, owing to having adopted orthogonal frequency division multiplexi, in the residential quarter, interference is eliminated, but in the situation that still there is presence of intercell interference in identical networking between neighbor cell.And along with the application of identical networking, especially be in the Cell Edge User that a plurality of residential quarters cover, because edge customer is closer apart from neighbor cell, these edge customers can produce larger interference to the user of neighbor cell, so presence of intercell interference becomes the principal element of system for restricting capacity and systematic function.
In order to suppress or to eliminate presence of intercell interference, the method for the Inter-Cell Interference Coordination that adopts in correlation technique.But it can limit the frequency band of scheduling edge customer, weakens the effect of selection scheduling frequently.
Summary of the invention
Can the frequency band of scheduling edge customer be limited for inter-cell interference coordination method, weaken the problem of the effect of selection scheduling frequently, the invention provides a kind of inter-cell interference coordination method and device, to address this problem at least.
The invention provides a kind of inter-cell interference coordination method, the method comprises: user's position is determined in the base station according to measurement report, and wherein user's position comprises one of following: the cell edge between the cell edge in center of housing estate, base station, base station and other base station; Determine available band according to the interference band information from other base station; In available band, according to user's position to user resource allocation.
Preferably, in available band,, also comprise to before user resource allocation according to user's position: according to load by heavily to light order, being sorted in the residential quarter in the base station.
Preferably, in available band, comprise to user resource allocation according to user's position: in available band, give according to user's position the user resource allocation of residential quarter the preceding that sorts.
Preferably, according to comprising that following method one of at least sorts to the residential quarter in the base station: the RB quantity allotted of PRB utilance, RB quantity allotted, edge customer.
Preferably, according to before determining available band from the interference band information of other base station, also comprise: receive the interference band information of passing through the X2 Signalling exchange from other base station.
Preferably, in available band, comprise to user resource allocation according to user's position: in the situation that user's position is the cell edge in center of housing estate or base station, give the resource of the first frequency band in the user assignment available band, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain; In the situation that user's position is the cell edge between base station and other base station, give the resource of the second frequency band in the user assignment available band.
The present invention also provides a kind of Inter-Cell Interference Coordination device, is applied to the base station.This device comprises: the first determination module, be used for determining according to measurement report user's position, and wherein user's position comprises one of following: the cell edge between the cell edge in center of housing estate, base station, base station and other base station; The second determination module is used for according to determining available band from the interference band information of other base station; Distribution module is used in available band, according to user's position to user resource allocation.
Preferably, said apparatus also comprises: order module is used for according to load by heavily to light order, being sorted in the residential quarter in the base station.
Preferably, distribution module comprises: the first distribution sub module, be used in available band, and give according to user's position the user resource allocation of residential quarter the preceding that sorts.
Preferably, distribution module comprises: the second distribution sub module, be used in the situation that user's position is the cell edge in center of housing estate or base station, give the resource of the first frequency band in the user assignment available band, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain; The 3rd distribution sub module is used in the situation that user's position is the cell edge between base station and other base station, gives the resource of the second frequency band in the user assignment available band.
The present invention is by distinguishing user's position, and gives according to this position to user resource allocation, improved the effect of selection scheduling frequently, and make scheduling and frequency partition more flexible.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the present invention;
Fig. 2 is the schematic diagram of Inter-Cell Interference Coordination according to the preferred embodiment of the invention;
Fig. 3 is the flow chart of inter-cell interference coordination method according to the preferred embodiment of the invention;
Fig. 4 is the schematic diagram of residential quarter coverage condition according to the preferred embodiment of the invention;
Fig. 5 is the schematic diagram of frequency band according to the preferred embodiment of the invention;
Fig. 6 is the structured flowchart according to the Inter-Cell Interference Coordination device of the embodiment of the present invention;
Fig. 7 is the structured flowchart one of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention;
Fig. 8 is the structured flowchart two of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
The invention provides a kind of inter-cell interference coordination method.Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the present invention, as shown in Figure 1, comprises that following step S102 is to step S106.
Step S102, user's position is determined in the base station according to measurement report, wherein user's position comprises one of following: the cell edge between the cell edge in center of housing estate, base station, base station and other base station.
Step S104 determines available band according to the interference band information from other base station.
Step S106, in available band, according to user's position to user resource allocation.
In correlation technique, inter-cell interference coordination method can limit the frequency band of scheduling edge customer, weakens the effect of selection scheduling frequently.In the embodiment of the present invention, by distinguishing user's position, and according to this position to user resource allocation, improved the effect of the frequency selection scheduling the base station in, and make dispatch and frequency partition more flexible.
and then, consider that the residential quarter that load weighs can take more available bandwidth, and load light residential quarter has a lot of idling-resources, just be used on the coordination edge customer, the present invention can be according to load by heavily to light order, sorted in residential quarter in the base station, then according to user's position, in available band, give the user resource allocation of residential quarter the preceding that sorts, thereby realize the priority ordering user resource allocation of residential quarter (residential quarter that load is heavy) the preceding, then give sequence after the user resource allocation of residential quarter (residential quarter that load is light), can to greatest extent edge customer be coordinated to open.Wherein, the method that is sorted in the residential quarter in the base station can comprise the RB quantity allotted of PRB utilance, RB quantity allotted or edge customer.
Preferably, in the interference band information of basis from other base station, before determining available band, the present invention can also comprise between the base station by X2 Signalling exchange interference band information, like this, can carry out coordinating semi-static interference between the base station, in order to consult the scope of restricted band.
Need to prove, can be by following mode to user resource allocation in the present invention, namely in the situation that user's position is the cell edge in center of housing estate or base station, give the resource of the first frequency band in the user assignment available band, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain; In the situation that user's position is the cell edge between base station and other base station, give the resource of the second frequency band in the user assignment available band.Like this, the Cell Edge User in the base station is dispatched respectively on different frequency bands from the Cell Edge User between the base station, realized the frequency band quadrature fully.
Need to prove, can carry out in the computer system such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Describe below in conjunction with preferred embodiment, following preferred embodiment combines above-described embodiment and preferred implementation.
Fig. 2 is the schematic diagram of Inter-Cell Interference Coordination according to the preferred embodiment of the invention, as shown in Figure 2, adopts in the base station and adopts coordinating semi-static interference mechanism between dynamic interference coordination mechanism, base station.
Fig. 3 is the flow chart of inter-cell interference coordination method according to the preferred embodiment of the invention, as shown in Figure 3, comprises that following step S302 is to step S308.
Step S302, according to the measurement report of A3 Event triggered, judgement user's position, Serving cell can infer that the user is in cell edge or center of housing estate.When being in cell edge, can further judge the covering that is arranged in which residential quarter.If these adjacent areas and Serving cell belong to same eNodeB, this user is the edge customer in eNodeB, if one of them adjacent area and Serving cell do not belong to an eNodeB, this user is the edge customer between eNodeB.
Fig. 4 is the schematic diagram of residential quarter coverage condition according to the preferred embodiment of the invention, as shown in Figure 4, has residential quarter 2 and 3 around residential quarter 1, and residential quarter 1 and residential quarter 2 belong to same eNodeB1, and residential quarter 3 belongs to eNodeB2.Wherein regional A, B, C, D represent the covering lap of three residential quarters.
When the user was positioned at regional A, the user was the eNodeB inward flange user of residential quarter 1 and residential quarter 2; When the user was positioned at regional B, the user was edge customer between the eNodeB of residential quarter 1 and residential quarter 3; When the user was positioned at regional C, the user was edge customer between the eNodeB of residential quarter 2 and residential quarter 3; When the user was positioned at regional D, the user was edge customer between the eNodeB of residential quarter 1, residential quarter 2 and residential quarter 3, is also the eNodeB inward flange user of residential quarter 1 and residential quarter 2.
Step S304, pass through the X2 signaling between eNodeB (as Overload Indicator, High Interference Indication), inform being disturbed frequency band or producing interference band of this residential quarter of neighbor cell, neighbor cell can make edge customer avoid these frequency bands, to suppress presence of intercell interference.Both sides finally negotiate the scope of restricted band according to the loading condition of self residential quarter.User type according to step 201 judgement draws user's available band.
Fig. 5 is the schematic diagram of frequency band according to the preferred embodiment of the invention, as shown in Figure 5, frequency band 1 is for edge customer between the eNodeB of dispatcher-controlled territory residential quarter 1 and residential quarter 2, namely be positioned at regional B, the C of Fig. 2 and the user of D, residue frequency band 2 is used for edge customer and the central user in scheduling eNodeB, namely is positioned at user and the Cell Center User of the regional A of Fig. 2.Between the eNodeB of residential quarter 1 and residential quarter 2 and residential quarter 3, edge customer is dispatched respectively on different frequency bands like this, has realized the frequency band quadrature fully.
Step S306 sorts to the residential quarter in eNodeB, determines the dispatching sequence of residential quarter.Sort why priority scheduling load heavy residential quarter, sector is because load heavy residential quarter very likely can take more available bandwidth, and has a lot of idling-resources in load light residential quarter, just is being used on the coordination edge customer.
The sort method of residential quarter can have following one or more:
Method one: PRB utilance.Add up each residential quarter PRB utilance.The PRB utilance is higher, i.e. this residential quarter load of eating dishes without rice or wine is heavier, and priority is higher; Otherwise there is more idle PRB this residential quarter, and priority is lower.
Method two: RB quantity allotted.The RB quantity summation that will distribute in each residential quarter current TTI of pre-estimation.If RB quantity is higher, illustrate that the PRB occupancy of this residential quarter in current TTI is very high, priority is high, otherwise otherwise.
Method three: the RB quantity allotted of edge customer.Will distribute to the RB quantity summation of edge customer in each sector current TTI of pre-estimation.If RB quantity is higher, illustrate that the RB quantity to be allocated of the edge customer of this sector in current TTI is higher, the frequency band limits that need to consider when the frequency selection scheduling is more, if first dispatch the user of this residential quarter, the edge customer that can guarantee larger business data volume is selected frequency band preferably, so priority is high, otherwise otherwise.
Sector sequence all is based on the method design of pre-estimation load.Good sector sort algorithm, the preferentially scheduling of the heavier residential quarter of proof load, and then improve throughput of system.
Step S308 carries out frequency band selection according to user type, edge customer is coordinated to open as far as possible.
The below illustrates dispatching method of the present invention.
Suppose, according to step S306 sequence, the priority of the residential quarter 1 under eNodeB1 is greater than residential quarter 2.
The user of first dispatching cell 1 according to user's channel quality, the factors such as qos requirement of business, dispatches one by one to the user.Consider user's type, the available band of selecting in step S304 is dispatched: the 1) edge customer in the user is Cell Center User or eNodeB is its Resources allocation in the frequency band 1 in Fig. 5; 2) when the user be edge customer between eNodeB, be its Resources allocation in the frequency band 2 in Fig. 5.
Follow the user of dispatching cell 2.Because residential quarter 1 has preferentially been dispatched, the edge customer of residential quarter 2 will be avoided the edge customer of having dispatched in residential quarter 1 as far as possible.
1) as the user-center user, be its Resources allocation in the frequency band 1 in Fig. 5, do not consider the scheduling situation of residential quarter 1.
2) being the eNodeB inward flange user of residential quarter 2 and residential quarter 1 as the user, is its Resources allocation in the frequency band 1 in Fig. 5, and can not the frequency band identical with the eNodeB inward flange CU of the residential quarter 2 of having dispatched in residential quarter 1 and residential quarter 1.
3) when the user be edge customer between the eNodeB of residential quarter 2 and residential quarter 3, be its Resources allocation in Fig. 5, do not consider the scheduling situation of residential quarter 1.
4) when the user be edge customer between the eNodeB of residential quarter 1, residential quarter 2 and residential quarter 3, also the eNodeB inward flange user for residential quarter 1 and residential quarter 2, be its Resources allocation in frequency band 2 in Fig. 5, and can not the frequency band identical with the eNodeB inward flange CU of the residential quarter 2 of having dispatched in residential quarter 1 and residential quarter 1.
The embodiment of the present invention provides a kind of Inter-Cell Interference Coordination device, and this Inter-Cell Interference Coordination device can be used for realizing above-mentioned inter-cell interference coordination method.Fig. 6 is the structured flowchart according to the Inter-Cell Interference Coordination device of the embodiment of the present invention, as shown in Figure 6, comprises the first determination module 62, the second determination module 64 and distribution module 66, and the below is described in detail its structure.
The first determination module 62 is used for determining user's position according to measurement report, and wherein user's position comprises one of following: the cell edge between the cell edge in center of housing estate, base station, base station and other base station; The second determination module 64 is used for determining available band according to the interference band information from other base station; Distribution module 66 is connected to the first determination module 62 and the second determination module 64, is used for the user's definite according to the first determination module 62 position, in the available band that the second determination module 64 is determined, gives user resource allocation.
Fig. 7 is the structured flowchart one of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention, and as shown in Figure 7, said apparatus also comprises order module 68, is used for according to load by heavily to light order, being sorted in the residential quarter in the base station.Distribution module 66 comprises: the first distribution sub module 662, be used in available band, according to user's position to order module 68 user resource allocation of residential quarter the preceding that sorts.
Fig. 8 is the structured flowchart two of Inter-Cell Interference Coordination device according to the preferred embodiment of the invention, and as shown in Figure 8, above-mentioned distribution module 66 comprises the second distribution sub module 664 and the 3rd distribution sub module 666.The below is described in detail its structure.
The second distribution sub module 664, be connected to the first determination module 62 and the second determination module 64, be used in the situation that the user's that the first determination module 62 is determined position is the cell edge in center of housing estate or base station, give the resource of the first frequency band in the user assignment available band that the second determination module 64 is determined, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain; The 3rd distribution sub module 666, be connected to the first determination module 62 and the second determination module 64, be used for giving the resource of the second frequency band in the user assignment available band that the second determination module 64 is determined in the situation that the user's that the first determination module 62 is determined position is the cell edge between base station and other base station.
Need to prove, the Inter-Cell Interference Coordination device of describing in device embodiment is corresponding to above-mentioned embodiment of the method, and its concrete implementation procedure had been carried out detailed description in embodiment of the method, do not repeat them here.
In sum, according to the abovementioned embodiments of the present invention, a kind of inter-cell interference coordination method and device are provided.The present invention is by distinguishing user's position, and gives according to this position to user resource allocation, improved the effect of selection scheduling frequently, and make scheduling and frequency partition more flexible.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby they can be stored in storage device, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. inter-cell interference coordination method is characterized in that comprising:
User's position is determined in the base station according to measurement report, it is one of following that wherein said user's position comprises: the cell edge between the cell edge in center of housing estate, described base station, described base station and other base station;
Determine available band according to the interference band information from described other base station;
In described available band, give described user resource allocation according to described user's position.
2. method according to claim 1, is characterized in that, in described available band, before giving described user resource allocation according to described user's position, also comprises: according to load by heavily to light order, being sorted in the residential quarter in described base station.
3. method according to claim 2, it is characterized in that, in described available band, comprise for described user resource allocation according to described user's position: in described available band, to give the described sequence user resource allocation of residential quarter the preceding according to described user's position.
4. method according to claim 2, is characterized in that, according to comprising that following method one of at least sorts to the residential quarter in described base station: the RB quantity allotted of PRB utilance, RB quantity allotted, edge customer.
5. method according to claim 1, is characterized in that, according to before determining available band from the interference band information of described other base station, also comprises: receive the described interference band information of passing through the X2 Signalling exchange from described other base station.
6. the described method of any one according to claim 1 to 5, is characterized in that, in described available band, comprises for described user resource allocation according to described user's position:
In the situation that described user's position is the cell edge in center of housing estate or described base station, give the resource of the first frequency band in the described available band of described user assignment, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain;
In the situation that described user's position is the cell edge between described base station and other base station, give the resource of the second frequency band in the described available band of described user assignment.
7. an Inter-Cell Interference Coordination device, be applied to the base station, it is characterized in that comprising:
The first determination module is used for determining according to measurement report user's position, and it is one of following that wherein said user's position comprises: the cell edge between the cell edge in center of housing estate, described base station, described base station and other base station;
The second determination module is used for according to determining available band from the interference band information of described other base station;
Distribution module is used in described available band, gives described user resource allocation according to described user's position.
8. device according to claim 7, is characterized in that, also comprises: order module is used for according to load by heavily to light order, being sorted in the residential quarter in described base station.
9. device according to claim 8, is characterized in that, described distribution module comprises: the first distribution sub module, be used in described available band, and give the described sequence user resource allocation of residential quarter the preceding according to described user's position.
10. the described device of any one according to claim 7 to 9, is characterized in that, described distribution module comprises:
The second distribution sub module, be used in the situation that described user's position is the cell edge in center of housing estate or described base station, give the resource of the first frequency band in the described available band of described user assignment, and the Cell Edge User that has in the base station of same coverage area staggers each other on frequency domain;
The 3rd distribution sub module is used in the situation that described user's position is the cell edge between described base station and other base station, gives the resource of the second frequency band in the described available band of described user assignment.
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| CN103139780B (en) | 2018-01-19 |
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