CN101945482A - Resource allocation method for coordinated multiple point (CoMP) mode and base station - Google Patents

Resource allocation method for coordinated multiple point (CoMP) mode and base station Download PDF

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CN101945482A
CN101945482A CN2010102923380A CN201010292338A CN101945482A CN 101945482 A CN101945482 A CN 101945482A CN 2010102923380 A CN2010102923380 A CN 2010102923380A CN 201010292338 A CN201010292338 A CN 201010292338A CN 101945482 A CN101945482 A CN 101945482A
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CN101945482B (en
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郭彩丽
卞宏梁
冯春燕
冯淑兰
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Yongtai County State owned asset management company
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Huawei Technologies Co Ltd
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Abstract

The invention discloses a resource allocation method for a coordinated multiple point (CoMP) mode and a base station, belonging to the communication technical field. The method comprises the following steps: receiving measurement information of various user equipment (UE) for which resources are to be allocated in an overlay cell; determining the optional CoMP modes on available time-frequency blocks of the UE and corresponding data rate and degree according to the measurement information; and carrying out resource allocation for the UE according to the optional CoMP mode on the available time-frequency blocks of the UE and the corresponding data rate and the degree. The invention further discloses a base station. The invention solves the problem of allocating time-frequency resources and the CoMP mode for users, and can meet the data rate requirement for each user maximally and maximize system optimization objectives. When the amount of the available time-frequency blocks is obviously less than that of the UE, performances are greatly improved.

Description

A kind of resource allocation methods and base station that is used for multipoint cooperative CoMP mode
Technical field
The present invention relates to communication technical field, particularly a kind of resource allocation methods and base station that is used for CoMP (Coordinative Multiple Point, multipoint cooperative) mode.
Background technology
In Modern Communication System, LTE-A (Long Term Evolution Advanced for example, further Long Term Evolution) in the system, the communication process of edge customer and Serving cell is subjected to the serious interference of neighbor cell, and can not satisfy the telex network needs, in order to address this problem, cooperative multipoint transmission (Coordinated Multiple Point transmission and reception has been proposed, abbreviation CoMP) technology, being cooperation mutually between each neighbor cell, is a terminal UE (User Equipment) or a plurality of UE service jointly.
The CoMP mode that LTE-A supports mainly contains: CBF (Coordinative Beam Form, collaborative beam forming), Coherent JP (Coherent Join Process, relevant Combined Treatment) and Non-Coherent JP (Non-Coherent Join Process, irrelevant Combined Treatment).Different CoMP modes are different with lifting degree to user data rate to the situation that takies of running time-frequency resource.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: neighbor cell has the public available time-frequency piece of multistage at overlapping region, if there are a plurality of users need carry out CoMP in this overlapping region simultaneously, how to select the running time-frequency resource of CoMP for these users' terminal just becomes a problem.
Summary of the invention
In order to select suitable time-frequency piece and CoMP mode for the multi-user, satisfy each user's data rate requirement, the embodiment of the invention provides a kind of resource allocation methods and base station that is used for multipoint cooperative (CoMP) mode.
The resource allocation methods of the described CoMP of being used for mode comprises: the metrical information that receives user equipment (UE) in the overlapping region of a plurality of sub-districts; According to the metrical information of described UE, determine described UE each optional CoMP mode on each optional time-frequency piece; Determine data rate and degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece; According to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
The embodiment of the invention also provides a kind of base station, and this base station comprises: this base station comprises: receiver module, optional CoMP mode determination module, degree determination module and distribution module; Wherein,
Receiver module is used to receive the metrical information of user equipment (UE) in the overlapping region of a plurality of sub-districts;
Optional CoMP mode determination module is used for the metrical information according to described UE, determines described UE each optional CoMP mode on each optional time-frequency piece;
The degree determination module is determined data rate and degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece;
Distribution module, be used for according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: by a kind of resource allocation methods and base station that is used for multipoint cooperative CoMP mode is provided, think that the user distributes running time-frequency resource and CoMP mode, can satisfy each user's data rate requirement to greatest extent.
Description of drawings
A kind of schematic flow sheet that be used for the resource allocation methods of multipoint cooperative (CoMP) mode of Fig. 1 for providing in the embodiment of the invention 1;
A kind of schematic flow sheet that be used for the resource allocation methods of multipoint cooperative (CoMP) mode of Fig. 2 for providing in the embodiment of the invention 2;
The structural representation of a kind of base station of providing in the embodiment of the invention 3 is provided Fig. 3;
Fig. 4 is the structural representation of the optional CoMP mode determination module in the base station of the embodiment of the invention 3;
Fig. 5 is the structural representation of the degree determination module in the base station of the embodiment of the invention 3;
Fig. 6 is the structural representation of the distribution module in the base station of the embodiment of the invention 3;
A kind of model schematic diagram that be used for the resource allocation methods of multipoint cooperative CoMP mode of Fig. 7 for providing in the embodiment of the invention 3.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment 1
A kind of resource allocation methods that is used for multipoint cooperative CoMP mode, referring to Fig. 1, this method may further comprise the steps:
101: the metrical information that receives user equipment (UE) in the overlapping region of a plurality of sub-districts;
102:, determine described UE each optional CoMP mode on each optional time-frequency piece according to the metrical information of described UE;
103: determine data rate and degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece.
104: according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: the beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: by a kind of resource allocation methods and base station that is used for multipoint cooperative CoMP mode is provided, think that the user distributes running time-frequency resource and CoMP mode, can satisfy each user's data rate requirement to greatest extent.
Embodiment 2
Referring to Fig. 2, the embodiment of the invention provides a kind of resource allocation methods that is used for multipoint cooperative CoMP mode, in the present embodiment, i user equipment (UE) (Serving cell of this i UE is sub-district 1 or sub-district 2) with the overlapping region of two sub-districts (sub-district 1 and sub-district 2) is example, for this i UE distributes optional time-frequency piece and optional CoMP mode, wherein i is the number of the subscriber equipment (UE) of overlapping region.
Step 201: the metrical information that receives the user equipment (UE) of each resource to be allocated in the overlay cells;
Serving cell sends to time-frequency position, bandwidth and the Serving cell transmission power information on these time-frequency pieces that can be used for the available time-frequency piece of CoMP mode in the overlapping region UE that belongs to this Serving cell of overlapping region, promptly, sub-district 1 sends to the UE that belongs to sub-district 1 with above-mentioned information, and sub-district 2 sends to above-mentioned information the UE that belongs to sub-district 2.
After each UE in the overlapping region receives above-mentioned information, measure information such as downlink channel response on the corresponding time-frequency piece and noise power, and these metrical informations are reported Serving cell to separately, present embodiment is not done qualification to the content of metrical information, and Serving cell receives the metrical information of UE separately.
Step 202:, determine described UE each optional CoMP mode on each optional time-frequency piece according to the metrical information of described UE;
The signal that each sub-district that comprises in the metrical information according to described UE sends on the downlink channel response information on each available time-frequency piece of this UE, each sub-district each available time-frequency piece at this UE and under described each optional CoMP mode each sub-district signal transmitted to each UE effect, the data rate when calculating described UE and on described each available time-frequency piece, adopting described each available CoMP mode;
In the data-rate requirements scope of data rate at this UE when if described UE adopts an available CoMP mode on an available time-frequency piece, then determining to adopt on the described available time-frequency piece described CoMP mode is the optional CoMP mode of employing on the optional time-frequency piece of described UE.In the embodiments of the invention, described " available time-frequency piece " and " available CoMP mode " refer to candidate's time-frequency piece and the CoMP mode of a UE, these resources differ and satisfy the demand of UE surely, it will become the optional resource of UE when these resources can satisfy the UE demand, and promptly UE can select to use these optional resources to carry out work.
Still with the above-mentioned example that is exemplified as, (this metrical information comprises the downlink channel response information of each UE on each available time-frequency piece according to the metrical information that each UE sent that belongs to sub-district 1 that receives in sub-district 1, the useful signal that each sub-district sends on the available time-frequency piece of the UE of each resource to be allocated that belongs to sub-district 1), and (for example according to the effect of 2 pairs of sub-districts 1, sub-district under the various optional CoMP modes, in such cases, sub-district 2 is as cooperation cell or interfered cell, because the signal that cooperation cell and interfered cell are launched is different to the effect of the received signal of the UE that belongs to sub-district 1), used computing formula during by following describe in detail, the UE that can calculate each resource to be allocated that belongs to sub-district 1 is adopting under every kind of optional CoMP mode the data rate that can reach on each available time-frequency piece; To belong to the data rate that the UE of each resource to be allocated of sub-district 1 adopts every kind of CoMP mode to reach on each available time-frequency piece compares with the data-rate requirements scope of the UE of described resource to be allocated, if described data rate is included in the data-rate requirements scope of UE of described resource to be allocated, the optional CoMP mode of the UE that then described CoMP mode is described resource to be allocated on described available time-frequency piece.
Each UE is traveled through all available time-frequency pieces and in the optional CoMP mode of this available time-frequency piece, and optional CoMP mode on each available time-frequency piece is determined for each UE that belongs to sub-district 1 in sub-district 1.
Similar with the aforementioned calculation process, optional CoMP mode on each available time-frequency piece is also determined for each UE that belongs to sub-district 2 in sub-district 2.
To specifically describe sub-district 1 and sub-district 2 below and be respectively the process that each UE that belongs to this sub-district determines the optional CoMP mode on each available time-frequency piece:
For convenience of description, the optional CoMP mode with present embodiment is expressed as follows:
The optional CoMP mode of present embodiment comprises collaborative beam forming CBF, relevant Combined Treatment Coherent JP and irrelevant Combined Treatment Non-Coherent JP.
CoMP mode coding rule is defined as follows:
Suppose that j available time-frequency piece is SP (j), then carrying out CBF on SP (j) can be expressed as: CoMP (x), wherein x=(j-1) * 3+1;
Carrying out Coherent JP on SP (j) can be expressed as: CoMP (x), wherein x=(j-1) * 3+2;
Carrying out Non-Coherent JP on SP (j) can be expressed as: CoMP (x), wherein x=j*3.
The Serving cell of i user equipment (UE) (i) is set at eNB (k) (k is the numbering of the sub-district of CoMP participating mode, and be example with two cell cooperatives, and then k is 1 or 2) here;
The metrical information of i the UE that belongs to eNB (k) (being expressed as UE (i)) that service cell eNB (k) receives has comprised the downlink channel response H of UE (i) in eNB (k), on the j individual available time-frequency piece J, k, i, (k is 1 and/or 2) and the noise power σ on each time-frequency piece 2 I, j
Be specifically described as the detailed process that UE in the overlay cells determines various optional CoMP modes below respectively:
A) determine that can UE (i) carry out the CBF mode on available time-frequency piece SP (j)
The service cell eNB (k) of all supposing UE (i) in the example below is sub-district 1, and promptly k=1 is under the CBF mode in optional CoMP mode, and the downstream signal that sub-district 2 sends on identical time-frequency piece is to disturb to UE (i).
Utilize formula (1), to go up the downlink channel response H of sub-district 1 to UE (i) at time-frequency piece SP (j) J, 1, iCarrying out SVD decomposes.
H j，1，i＝UAV H (1)
In the formula, H J, 1, iBe the N*M matrix, U and V are respectively the unitary matrice of N*N and M*M, and Λ is the N*M matrix, and its diagonal entry is non-negative real number, and off diagonal element is 0, and the diagonal entry of Λ is the H that arranges from big to small from top to bottom J, 1, iSingular value.The matrix V that obtains like this is H J, 1, iCorresponding linear predictive coding matrix V J, 1, iBe that UE (i) selects the column vector corresponding with maximum singular value among the V, as it precoding vector U (j, 1, i).At the whole embodiment of the present invention, the variable that the letter in expression formula bracket and the subscript of expression formula all are used to express this expression formula, the two there is no essence difference.For example, H J, 1, iWith H (j, 1, i) implication of Biao Daing is identical.
Utilize formula (2), the Signal to Interference plus Noise Ratio SINR of the useful signal that the sub-district 1 of calculating UE (i) demodulation output sends J, 1, i
SINR i , x = SIN R j , 1 , i = | U j , 1 , i H H j , 1 , i H H j , 1 , i U j , 1 , i | P 1 , j | U j , 1 , i H H j , 1 , i H H j , 2 , i U j , 2 , i * | P 2 , j + σ i , j 2 - - - ( 2 )
Because sub-district 1 is the Serving cell of UE (i), the downstream signal that sub-district 2 sends on identical time-frequency piece produces interference effect to UE (i), so UE (i) is at total Signal to Interference plus Noise Ratio SINR of the useful signal of identical time-frequency piece I, xWith the Signal to Interference plus Noise Ratio SINR of sub-district 1 at the useful signal of identical time-frequency piece J, 1, iEquate.
In the formula, molecule is the available signal power that the sub-district that receives of UE (i) 1 sends, first of denominator For hypothesis 2 has user I in the sub-district *When also using SP (j) to carry out CBF, sub-district 2 sends the interference power that downstream signal causes UE (i), second of denominator
Figure BSA00000286316600072
The noise power of locating at SP (j) for UE (i).
Utilize formula (3), can obtain the useful signal data rate R that sub-district 1 sends J, 1, i, under this sight, suppose that the interference that cooperation cell 2 ideally causes is zero, like this, the total data rate of useful signal
CoR I, xWith the data rate R of sub-district 1 at identical time-frequency piece J, 1, iEquate.
CoR i，x＝R j，1，i＝B j*log(1+SINR j，1，i) (3)
Wherein B (j) is the bandwidth of j available time-frequency piece SP (j), x=(j-1) * 3+1.
If CoR I, xIn the data-rate requirements scope R (i) of UE (i) (the data-rate requirements scope of UE (i) is a predetermined value), then UE (i) is CBF in the optional CoMP mode of time-frequency piece SP (j), that is, and and CoMP I, x=1, (wherein x=(j-1) * 3+1).
If CoR I, xIn the data-rate requirements scope R (i) of UE (i), then UE (i) can not select the CBF mode, that is, and and CoMP I, x=0, wherein (x=(j-1) * 3+1).
B) determine that can UE (i) carry out Coherent JP on available time-frequency piece SP (j)
Under this mode, sub-district 1 and sub-district 2 all are UE (i) service, and sub-district 1 data identical with sub-district 2 synchronized transmissions are given UE (i), that is, the signal of two sub-district transmissions merges at UE (i) end.
Utilize above-mentioned formula (1), on time-frequency piece SP (j), the downlink channel response H of sub-district 1 and sub-district 2 to UE (i) J, 1, iAnd H J, 2, iCarry out SVD respectively and decompose, obtain the precoding vector U that should use sub-district 1 J, 1, iThe precoding vector U that should use with sub-district 2 J, 2, i
Utilize formula (5), calculate total Signal to Interference plus Noise Ratio SINR of the useful signal of UE (i) I, x, (wherein x=(j-1) * 3+2).
SINR i , x = | U 1 H H j , 1 , i H H j , 1 , i U 1 | P 1 , j + | U 2 H H j , 2 , i H H j , 2 , i U 2 | P 2 , j σ i , j 2 - - - ( 5 )
In the formula, molecule is the available signal power sum that the sub-district 1 that receives of UE (i) and sub-district 2 send, and denominator is the noise power that SP (j) locates at UE (i),
Because Coherent JP regulation can only be distributed to a user, so the co-channel interference that does not exist other user to cause.
Utilize formula (6), can calculate the data rate CoR that UE (i) adopts Coherent JP mode to reach I, x:
CoR i，x＝B j*log(1+SINR i，x) (6)
Wherein B (j) is the bandwidth of j available time-frequency piece SP (j), x=(j-1) * 3+2.
If CoR I, xIn the data-rate requirements scope R (i) of UE (i), then the optional CoMP mode of UE (i) on time-frequency piece SP (j) is Coherent JP, that is, and and CoMP I, x=1, (wherein x=(j-1) * 3+2).
If CoR I, xIn the data-rate requirements scope R (i) of UE (i), then UE (i) can not select Coherent JP mode, CoMP on time-frequency piece SP (j) I, x=0 (wherein x=(j-1) * 3+2).
C) determine that can UE (i) carry out Non-Coherent JP mode on available time-frequency piece SP (j)
In this manner, 2, two sub-districts of serving for UE (i) (Serving cell is sub-district 1) in sub-district 1 and sub-district that have send different data to UE (i), and two paths of signals has the phase mutual interference.
At first, respectively on time-frequency piece SP (j), the downlink channel response H of sub-district 1 and sub-district 2 to UE (i) J, 1, iAnd H J, 2, iCarry out SVD and decompose, obtain under this CoMP mode the precoding vector U that sub-district 1 should be used J, 1, iAnd the sub-district 2 precoding vector U that should use J, 2, i
In this manner, it is demodulation respectively that the signal of two sub-district transmissions is held at UE (i), utilizes formula (7) and formula (8) respectively, calculates the Signal to Interference plus Noise Ratio SINR of two paths of signals demodulation output J, 1, iAnd SINR J, 2, i
SIN R j , 1 , i = | U 1 H H j , 1 , i H H j , 1 , i U 1 | P 1 , j | U 1 H H j , 1 , i H H j , 2 , i U 2 | P 2 , j + σ i , j 2 - - - ( 7 )
SINR j , 2 , i = | U 2 H H j , 2 , i H H j , 2 , i U 2 | P 2 , j | U 2 H H j , 2 , i H H j , 1 , i U 1 | P 1 , j + σ i , j 2 - - - ( 8 )
In the formula (7), molecule is the available signal power that the sub-district that receives of UE (i) 1 sends, first of denominator The interference power that the signal that the signal that sends for sub-district 2 sends demodulation sub-district 1 causes, second of denominator
Figure BSA00000286316600084
The noise power of locating at UE (i) for SP (j).The implication and the formula (7) of variable are similar in the formula (8).
Utilize formula (9) and formula formula (10) respectively, calculate the data rate Rj of two paths of signals, 1, i and Rj, 2, i
R j，1，i＝B j*log(1+SINR j，1，i) (9)
R j，2，i＝B j*log(1+SINR j，2，i) (10)
Wherein B (j) is the bandwidth of j available time-frequency piece SP (j).
Utilize formula (11), calculate the data rate CoR that UE (i) adopts this CoMP mode to reach I, x, CoR I, xBe two paths of signals data rate sum:
CoR i，x＝R j，1，i+R j，2，i＝B j*[log(1+SINR j，1，i)+log(1+SINR j，2，i)] (11)
Wherein B (j) is the bandwidth of j available time-frequency piece SP (j), (wherein x=j*3).
If CoR I, xIn the data rate R of UE (i) (i) range of needs, the optional Non-Coherent JP of UE (i) mode then, that is, and CoMP I, x=1 (wherein x=j*3), the UE optional CoMP mode CoMP on available time-frequency piece SP (j) I, xPairing data rate is CoR I, x
If CoR I, xIn the data rate R of UE (i) (i) range of needs, then UE (i) can not select Non-Coherent JP mode, CoMP I, x=0 (wherein x=j*3).
Travel through all available time-frequency pieces and (promptly find the solution and obtain all CoMP in the optional CoMP mode of this available time-frequency piece I, xX=0 wherein, 1,2 ..., (J*L-1), J is the sum of available time-frequency piece, L is available CoMP mode, here, and L=3, obtaining that the described unallocated optional CoMP mode of UE on described available time-frequency piece of joining resource gather (is CoMP I, xAll x of=1).
Through above-mentioned steps, determined that for each UE of overlay cells the optional CoMP mode on the available time-frequency piece gathers.
Step 203: determine the degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece;
If adopting described optional CoMP mode on the described optional time-frequency piece is collaborative beam forming CBF, the quantity that the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be CBF is other UE of CBF for the optional CoMP mode that belongs to same sub-district with described UE and adopt on identical optional time-frequency piece;
If adopt described optional CoMP mode to be relevant Combined Treatment Coherent JP on the described optional time-frequency piece, the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be Coherent JP is and the described UE quantity that to have the optional CoMP mode that adopts on the identical optional time-frequency piece be other UE of Coherent JP;
If adopting described optional CoMP mode on the described optional time-frequency piece is irrelevant Combined Treatment Non-Coherent JP, the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be Non-Coherent JP is and the described UE quantity that to have the optional CoMP mode that adopts on the identical optional time-frequency piece be other UE of Non-Coherent JP.
Accept top example, determined optional CoMP on the available time-frequency piece at the UE (i) that is the resource to be allocated of overlay cells I, xAfter the mode, for the UE of described each resource to be allocated has determined optional CoMP on the available time-frequency piece I, xThe degree of mode.
If optional CoMP mode is CBF on the available time-frequency piece of this UE, the degree that optional CoMP mode is CBF on the available time-frequency piece of this UE is so: belong to the quantity of the UE of other unallocated resource that optional CoMP mode is CBF on same sub-district and the identical available time-frequency piece with this UE.
If optional CoMP mode is relevant Combined Treatment Coherent JP or irrelevant Combined Treatment Non-Coherent JP on the available time-frequency piece of this UE, so on the available time-frequency piece of this UE optional CoMP mode for the degree of relevant Combined Treatment Coherent JP or irrelevant Combined Treatment Non-Coherent JP be respectively on this described available time-frequency piece optional CoMP mode for the quantity of the UE of other unallocated resource of relevant Combined Treatment Coherent JP or irrelevant Combined Treatment Non-Coherent JP and.
For the UE of described each resource to be allocated has determined the detailed process of carrying out resource allocation for the UE of described each resource to be allocated to be described below after the degree of optional CoMP (x) mode on the available time-frequency piece:
Step 204: according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
If having, the UE of unallocated resource adopts optional CoMP mode on the optional time-frequency piece, then calculate the ratio of the degree of the described optional CoMP mode of employing on the data rate that adopts optional CoMP mode on the optional time-frequency piece of UE of all unallocated resources and the described optional time-frequency piece, the optional CoMP mode on pairing optional time-frequency piece of maximum ratio and the described time-frequency piece is distributed to the UE of described maximum ratio correspondence;
Never deletion during the UE of Resources allocation gathers with described UE;
Upgrade on the optional time-frequency piece of UE of unallocated resource and adopt optional CoMP mode,
According to the UE of unallocated resource adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for the UE of described unallocated resource carries out resource allocation; Till the UE of unallocated resource does not have on the optional time-frequency piece the optional CoMP mode of employing or all UE distribute to adopt optional CoMP mode on the optional time-frequency piece.
With the top example that is exemplified as, UE to current all unallocated resources, by the degree of optional CoMP mode on the data rate of optional CoMP mode on the available time-frequency piece of the UE of all unallocated resources and the described available time-frequency piece is done the ratio computing, optional CoMP mode on the pairing available time-frequency piece of maximum ratio is distributed to the pairing UE of this maximum ratio, that is, this UE has been distributed optional CoMP mode on available time-frequency piece and this available time-frequency piece.This UE is never deleted among the UE of Resources allocation.Owing to deleted the UE that has distributed resource, need utilize said method, recomputate the degree of optional CoMP mode on the available time-frequency piece of UE of these unallocated resources; Upgrade optional CoMP mode on the available time-frequency piece of resource UE to be allocated, afterwards, utilize identical method to carry out resource allocation, all be assigned with resource or do not had available time-frequency piece or optional CoMP mode is distributed to the UE of resource to be allocated up to all UE for the UE of the unallocated resource of remainder.
On the optional time-frequency piece that upgrades remaining resource UE to be allocated during optional CoMP mode, as the case may be, this optional CoMP mode is deleted the optional CoMP mode from the optional time-frequency piece of the resource UE to be allocated of remainder on the optional time-frequency piece that determines whether to have distributed.
The optional time-frequency piece of described renewal resource UE to be allocated and corresponding C oMP mode specifically comprise:
If the CoMP mode that is assigned with is Coherent JP or Non-Coherent JP, optional time-frequency piece that then will distribute and corresponding C oMP mode are never deleted in the optional time-frequency piece of the UE of Resources allocation and the corresponding CoMP mode thereof;
If the CoMP mode that is assigned with is CBF, and the UE of unallocated resource and the UE that is assigned with resource belong to same Serving cell, and optional time-frequency piece that then will distribute and corresponding C oMP mode are deleted from the optional time-frequency piece of described unallocated resource UE and corresponding CoMP mode thereof;
If the CoMP mode that is assigned with is CBF, and the UE of unallocated resource and the UE that is assigned with resource do not belong to same Serving cell, then judge whether to exist in and carry out the UE that CBF can satisfy jamming margin and satisfy the minimum data rate of self on the identical time-frequency piece, if exist, optional time-frequency piece that then will distribute and corresponding C oMP mode are retained in the optional time-frequency piece and corresponding CoMP mode thereof of described resource UE to be allocated; Otherwise, the optional time-frequency piece that distributed and corresponding C oMP mode are deleted from the optional time-frequency piece of described resource UE to be allocated and corresponding CoMP mode thereof.
When on the optional time-frequency piece that upgrades remaining unallocated resource UE, adopting optional CoMP mode, this optional CoMP mode is deleted the optional CoMP mode from the optional time-frequency piece of the unallocated resource UE of remainder on the optional time-frequency piece that whether will distribute, needs to do further to judge:
If the CoMP mode that is assigned with is CBF:
When the UE that has only unallocated resource and the UE that is assigned with resource belong to same Serving cell, just CBF mode on the optional time-frequency piece that distributed and this time-frequency piece cannot be distributed the UE of this unallocated resource, that is, the optional time-frequency piece that distributed and the CBF mode on this time-frequency piece are never deleted in the CBF mode on this time-frequency piece of the UE of Resources allocation.
And when the UE of resource to be allocated and the UE that is assigned with resource belong to different Serving cell, then utilize formula (4), calculating is the UE of each resource to be allocated of sub-district 2 at Serving cell, if also adopt the CBF mode on this time-frequency piece, the Serving cell (sub-district 1) under the UE of Resources allocation (supposing that Serving cell is sub-district 1) is to the jamming margin I of sub-district 2 J, 2, i,
Δ j，2，i＝SINR j，1，i-f -1(R imin) (4)
F wherein -1Expression is by the anti-SINR that asks of channel capacity
According to Δ J, 2, iCan obtain UE (i) jamming margin I to eNB2 under CoMP (x) mode J, 2, i
If the jamming margin of UE that calculates the 1 pair of sub-district 2, sub-district under the UE that has distributed the CBF mode satisfies the requirement of system (can by systemic presupposition), and the minimum data rate that satisfies the UE self of sub-district 2 requires (by systemic presupposition), then CBF mode on this optional time-frequency piece that has distributed can also be distributed in the UE of sub-district 2, otherwise, CBF mode on this optional time-frequency piece that has distributed cannot be distributed in the UE of sub-district 2.
If the CoMP mode that is assigned with is other modes:
Optional CoMP mode is never deleted in the optional CoMP mode on this optional time-frequency piece of the UE of Resources allocation and this available time-frequency piece on the optional time-frequency piece that then will distribute and this time-frequency piece.
Embodiment 3
Above-mentionedly, can finish the UE of resource to be allocated by colouring for distributing the step of optional CoMP mode on available time-frequency piece and this available time-frequency piece.
Referring to Fig. 7, optional CoMP mode on the available time-frequency piece of the UE of resource to be allocated is defined as CoMP I, x: the UE in the corresponding overlapping region of i wherein, with x mould 3, resulting quotient is the available time-frequency piece number of UE (i), and with x mould 3, the corresponding optional CoMP mode of resulting remainder, remainder is 1 corresponding CBF mode, and remainder is 2 corresponding Coherent JP modes, and remainder is 3 corresponding Non-Coherent JP modes, make the corresponding Col (x) of x, that is, the corresponding a kind of color of each X is just with CoMP I, xCorrespond to Col I, x
In this example, suppose that there are 5 available time-frequency piece (time-frequency pieces 0 overlapping region, 1,2,3,4), each time-frequency piece all has 3 kinds of optional CoMP modes, and so total 5*3=15 kind resource need be distributed to all UE in the overlapping region, for example, assignable resource is when optional CoMP mode is CBF on the time-frequency piece 0, can be expressed as CoMP I, 1(because x removes 3 merchant is the number of time-frequency piece, the remainder of x mould 3 is optional CoMP, remainder is 1 for the CBF mode, remainder is 2 corresponding Coherent JP modes, remainder is 0 corresponding Non-Coherent JP mode, so when assignable resource is CBF mode on the available time-frequency piece 0, can calculate x=0*3+1=1).
In this example, suppose that there are 4 UE (UEs, UEt, UEm, UEn) overlapping region.The process of the coloring models of setting up these 4 UE is described below:
At first, with 4 summits (Vs, Vt, Vm, Vn) in the corresponding respectively one-tenth color-patch map of these 4 UE (UEs, UEt, UEm, the UEn) model, then for setting up information list in each summit.
All comprise summit itself in the information list on each summit in the summit respectively, and the Serving cell of each pairing UE in summit is documented in the information list on each summit;
With the available time-frequency piece of these 4 UE and the optional CoMP mode CoMP on this time-frequency piece I, xCorresponding become the summit manage to make do color Col I, x(wherein s, t, m, the n (having indicated each UE) among corresponding Vs, Vt of i, Vm, the Vn).For example, be CoMP by calculating the assignable resource of UEs S, 1, CoMP S, 5And CoMP S, 9, the color of managing to make do that corresponds in the information list of summit Vs is: Col S, 1, Col S, 5And Col S, 9, the color of managing to make do in the information list of summit Vt is: Col T, 1, Col T, 5And Col T, 9, the color of managing to make do in the information list of summit Vm is: Col M, 1And Col M, 5, the color of managing to make do in the information list of summit Vn is: Col N, 1And Col N, 9
The original painted income a of the information list on each summit in this example I, x, be this UE data rate that this optional CoMP mode can reach on this available time-frequency piece.
Describe below and utilize colouring to calculate the degree d that each manages to make do color I, x(to degree that should the pairing UE in summit this optional CoMP mode on this available time-frequency piece).
At first be described as the process of each the summit edged in this model:
With summit Vs is example, the information list by this summit as can be known, this summit has 3 kinds and manages to make do color Col S, 1, Col S, 5And Col S, 9, wherein each is managed to make do color, judging also has identical color in the information list whether other summit is arranged in this model, then can come to be these summit edgeds according to the pairing optional CoMP mode of this color.If summit Vi manages to make do color Col I, xCorresponding Coherent JP or Non-Coherent JP mode (is 2 or 0 with the remainder of x mould 3) are if then exist fixed point V I '(i ' comprise i) manage to make do Coherent JP or Non-Coherent JP mode, the i.e. Col of the corresponding same time-frequency piece of color I ', (x/3) * 3) or Col I ', (x/3) * 3+2), wherein (x/3) expression removes merchant after 3 to x, then with the solid line connection of this color they.If manage to make do the corresponding CBF mode (is 1 with the remainder of x mould 3) of color, judge then whether have the identical summit of color of managing to make do with Vs belongs to a Serving cell with Vs, if then the solid line with this color connects them, otherwise, connect them with this dotted line of color of managing to make do.
In this model, for managing to make do color Cols, 1, owing to manage to make do color Col S, 1In 1 mould 3 surplus 1 (corresponding CBF mode), the information list of summit Vs, Vt, Vm and Vn all has this color of managing to make do, the edged process is specific as follows:
Serving cell in the information table of Vs and Vt identical (sub-district 1) is then with managing to make do color Col S, 1Solid line connect summit Vs and Vt.
Serving cell in the information table of Vs and Vm is different, then with managing to make do color Col S, 1Dotted line connect summit Vs and Vm.
Serving cell in the information table of Vs and Vn is different, then with managing to make do color Col S, 1Dotted line connect summit Vs and Vn.
Serving cell in the information table of Vt and Vm is different, then with managing to make do color Col S, 1Dotted line connect summit Vt and Vm.
Serving cell in the information table of Vt and Vn is different, then with managing to make do color Col S, 1Dotted line connect summit Vt and Vn.
Serving cell in the information table of Vm and Vn identical (sub-district 2) is then with managing to make do color Col S, 1Solid line connect the summit
For managing to make do color Col S, 5, owing to manage to make do color Col S, 5In 5 moulds 3 surplus the 2 Coherent JP modes of the 2nd time-frequency piece (corresponding), the information list of summit Vs, Vt and Vm all has this color of managing to make do, the edged process is as follows: respectively with managing to make do color Col S, 5Solid line connect summit Vs and Vt, Vs and Vm and Vt and Vm.
For managing to make do color Cols, 9, owing to manage to make do color Col S, 9In 9 moulds 3 surplus 0 (corresponding the 3rd time-frequency piece Non-Coherent JP mode), the information list of summit Vs, Vt and Vn all has this color of managing to make do, the edged process is as follows: with managing to make do color Cols, 9 solid line connects summit Vs and Vt, Vs and Vn and Vt and Vn respectively.
And every kind in the information list on each summit manages to make do the degree of color to manage to make do the real limit number of color for this that is connected with this summit in the model.Thus, every kind in the information list on each summit in this model manages to make do the degree of color to be:
Manage to make do color Col in the information list of Vs S, 1Degree be 1, manage to make do color Col S, 5Degree be 2, manage to make do color Col S, 9Degree be 2;
Manage to make do color Col in the information list of Vt S, 1Degree be 1, manage to make do color Col S, 5Degree be 2, manage to make do color Col S, 9Degree be 2;
Manage to make do color Col in the information list of Vm S, 1Degree be 1, manage to make do color Col S, 5Degree be 2;
Manage to make do color Col in the information list of Vn S, 1Degree be 1, manage to make do color Col S, 9Degree be 2.
Process for each vertex coloring in this coloring models is described below:
Initial 4 summit Vs, Vt, Vm and Vn are not colored, at this moment, information list by each summit can calculate every kind of each summit and manage to make do the painted income of color and the ratio of this degree of managing to make do color, supposes that in such cases, maximum ratio is that the color of managing to make do of Vs is Col S, 1Painted income and the ratio of this degree of managing to make do color, this moment, will to manage to make do color be Col S, 1Distribute to Vs, that is, carried out painted summit Vs.(because Col S, 1In 1 mould, 3 quotients be surplus 0,1 mould 31, that is, the CBF mode on the time-frequency piece 0 is distributed to the pairing UEs of Vs).Delete in the summit that painted summit Vs never is colored, because summit Vs is deleted, empty limit that is connected with summit Vs and real limit are also with deleted.
Owing to deleted summit Vs and the empty limit that is connected with summit Vs and real limit also with the deleted information list that upgrades remaining 3 summits:
Owing to will manage to make do color Col S, 1Distribute to summit Vs, in the information list of summit Vt, Vm and Vn, whether delete and manage to make do color Col S, 1Need to do to judge:
To manage to make do color Col S, 1Delete from having the information list on summit of same services sub-district with Vs; In such cases, will manage to make do color Col in the information list of summit Vt S, 1Deletion is not managed to make do color Col and do not delete in the information list of Vm and Vn S, 1
Again upgrade the information list on remaining 3 summits, that is, calculate every kind of degree of managing to make do color on remaining 3 summits; Similar with the colorize method that is Vs, be other vertex coloring, up to all summits all be colored or the information list on remaining summit in do not managed to make do color.
If all summits can both be painted, represent that then all users that optional CoMP mode is arranged can both carry out CoMP, can satisfy the demand of oneself, can make system optimization target maximum again.If there have the residue summit not have to be painted, then Dui Ying user is current can not carry out CoMP, needs to wait for certain hour.
This programme has solved the problem of distributing running time-frequency resource and CoMP mode for the user.Each user's oneself data-rate requirements can be satisfied to greatest extent, system optimization target maximum can be made again.When available time-frequency number of blocks obviously is less than UE and counts, compare stochastic selection algorithm, the method that present embodiment provided obviously promotes performance.
Embodiment 4
Present embodiment provides a kind of base station.Participate in Fig. 3, this base station comprises: receiver module 300, optional CoMP mode determination module 310, degree determination module 320 and distribution module 330;
Wherein receiver module 300 is used to receive the metrical information of user equipment (UE) in the overlapping region of a plurality of sub-districts;
The metrical information that optional CoMP mode determination module 210 is used for according to described UE is determined described UE each optional CoMP mode on each optional time-frequency piece;
Degree determination module 220 is used for determining data rate and the degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece;
Distribution module 230 be used for according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
Referring to Fig. 4, described optional CoMP mode determination module 310 specifically comprises: computing unit 311 and determining unit 312; Wherein
Computing unit 311, be used for signal that each sub-district that the metrical information according to described UE comprises sends on the downlink channel response information on each available time-frequency piece of this UE, each sub-district each available time-frequency piece at this UE and under described each optional CoMP mode each sub-district signal transmitted to each UE effect, the data rate when calculating described UE and on described each available time-frequency piece, adopting described each available CoMP mode;
Determining unit 312, be used in the data-rate requirements scope of data rate at this UE when if described UE adopts an available CoMP mode on an available time-frequency piece, then determining to adopt on the described available time-frequency piece described CoMP mode is the optional CoMP mode of employing on the optional time-frequency piece of described UE.
Referring to Fig. 5, wherein said degree determination module 320 specifically comprises: beam shaping CBF degree computing unit 321, relevant Combined Treatment Coherent JP degree computing unit 322 and irrelevant Combined Treatment Non-Coherent JP degree computing unit 323;
Wherein beam shaping CBF degree computing unit 321, the described optional CoMP mode of employing is collaborative beam forming CBF on the described optional time-frequency piece if be used for calculating, the quantity that the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be CBF is other UE of CBF for the optional CoMP mode that belongs to same sub-district with described UE and adopt on identical optional time-frequency piece;
Relevant Combined Treatment Coherent JP degree computing unit 322, adopt described optional CoMP mode to be relevant Combined Treatment Coherent JP on the described optional time-frequency piece if be used for calculating, the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be Coherent JP is and the described UE quantity that to have the optional CoMP mode that adopts on the identical optional time-frequency piece be other UE of Coherent JP;
Irrelevant Combined Treatment Non-Coherent JP degree computing unit 323, to adopt described optional CoMP mode on the described optional time-frequency piece be irrelevant Combined Treatment Non-Coherent JP if be used for calculating, and the degree that then described UE adopts optional CoMP mode on optional time-frequency piece be Non-Coherent JP is and the described UE quantity that to have the optional CoMP mode that adopts on the identical optional time-frequency piece be other UE of Non-Coherent JP.
Referring to Fig. 6, wherein said distribution module 330 specifically comprises: allocation units 331; Wherein
Allocation units 331, the data rate when UE that is used for calculating respectively a plurality of unallocated resources adopts each optional CoMP mode on each optional time-frequency piece and the ratio of degree are distributed to the UE that has this maximum ratio with the optional CoMP mode on pairing optional time-frequency piece of maximum ratio and the described time-frequency piece.
The device that present embodiment provides belongs to same design with method embodiment, and its specific implementation process sees method embodiment for details, repeats no more here.
This programme has solved the problem of distributing running time-frequency resource and CoMP mode for the user.Each user's oneself data-rate requirements can be satisfied to greatest extent, system optimization target maximum can be made again.When available time-frequency number of blocks obviously was less than UE and counts, it was more obvious to compare the stochastic selection algorithm performance boost.
All or part of content in the technical scheme that above embodiment provides can realize that its software program is stored in the storage medium that can read by software programming, storage medium for example: the hard disk in the computer, CD or floppy disk.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a resource allocation methods that is used for multipoint cooperative CoMP mode is characterized in that, this method comprises:
Receive the metrical information of user equipment (UE) in the overlapping region of a plurality of sub-districts;
According to the metrical information of described UE, determine described UE each optional CoMP mode on each optional time-frequency piece;
Determine data rate and degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece;
According to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
2. method according to claim 1 is characterized in that, described metrical information according to described UE determines that described UE each optional CoMP mode on each optional time-frequency piece comprises:
The signal that each sub-district that comprises in the metrical information according to described UE sends on the downlink channel response information on each available time-frequency piece of this UE, each sub-district each available time-frequency piece at this UE and under described each optional CoMP mode each sub-district signal transmitted to this UE effect, the data rate when calculating described UE and on described each available time-frequency piece, adopting described each available CoMP mode;
In the data-rate requirements scope of data rate when if described UE adopts an available CoMP mode on an available time-frequency piece, determine that then the described CoMP mode of employing is the optional CoMP mode that adopts on the optional time-frequency piece of described UE on the described available time-frequency piece at this UE.
3. method according to claim 1 is characterized in that, described definite described UE adopts the degree of described each optional CoMP mode to comprise on described each optional time-frequency piece:
If adopting described optional CoMP mode on the described optional time-frequency piece is collaborative beam forming CBF, then described UE is adopting the degree of CBF to be on the optional time-frequency piece: belong to same sub-district with described UE and adopt the quantity of other UE of CBF on identical optional time-frequency piece;
If adopt described optional CoMP mode to be relevant Combined Treatment Coherent JP on the described optional time-frequency piece, then described UE is adopting the degree of Coherent JP to be on the optional time-frequency piece: adopt the quantity of other UE of Coherent JP with described UE on identical optional time-frequency piece;
If adopting described optional CoMP mode on the described optional time-frequency piece is irrelevant Combined Treatment Non-Coherent JP, then described UE is adopting the degree of Non-Coherent JP to be on the optional time-frequency piece: adopt the quantity of other UE of Non-Coherent JP with described UE on identical optional time-frequency piece.
4. method according to claim 1, it is characterized in that, described according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, comprise for described UE carries out resource allocation:
The data rate when UE that calculates a plurality of unallocated resources respectively adopts each optional CoMP mode on each optional time-frequency piece and the ratio of degree are distributed to the UE that has this maximum ratio with the optional CoMP mode on pairing optional time-frequency piece of maximum ratio and the described time-frequency piece.
5. method according to claim 4 is characterized in that, after the optional CoMP mode on described optional time-frequency piece and the described time-frequency piece was distributed to the UE that has maximum ratio, described method also comprised:
With deletion in the UE of the described Resources allocation UE set of Resources allocation never;
Upgrade the optional CoMP mode that adopts on the optional time-frequency piece of UE of unallocated resource,
According to the UE of unallocated resource adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, the UE that continues as described unallocated resource carries out resource allocation.
6. method according to claim 5 is characterized in that, adopts optional CoMP mode to comprise on the optional time-frequency piece of the UE of the unallocated resource of described renewal:
If the CoMP mode that adopts on the time-frequency piece that has been assigned with is Coherent JP or Non-CoherentJP, delete in the optional CoMP mode that the described CoMP mode that adopts on the described time-frequency piece that then will be assigned with never adopts on the described optional time-frequency piece of the UE of Resources allocation;
If the CoMP mode that adopts on the time-frequency piece that has been assigned with is CBF, and the UE of unallocated resource and the UE that has been assigned with resource belong to same Serving cell, and the mode that adopts CBF on the time-frequency piece that then will be assigned with is deleted from the optional CoMP mode that the described optional time-frequency piece of described unallocated resource UE adopts;
If the CoMP mode that adopts on the time-frequency piece that has been assigned with is CBF, and the UE of unallocated resource and the UE that is assigned with resource do not belong to same Serving cell, then judge whether to exist the UE that adopts CBF can satisfy jamming margin on the described time-frequency piece that has been assigned with and satisfy the minimum data rate of self, if exist, adopt the CBF mode to be retained in the optional CoMP mode that adopts on the optional time-frequency piece of described unallocated resource UE on the described time-frequency piece that then will be assigned with; Otherwise, the CBF mode that adopts on the described time-frequency piece that has been assigned with is deleted from the optional CoMP mode that the optional time-frequency piece of described unallocated resource UE adopts.
7. a base station is characterized in that, this base station comprises: receiver module, optional CoMP mode determination module, degree determination module and distribution module; Wherein,
Receiver module is used to receive the metrical information of user equipment (UE) in the overlapping region of a plurality of sub-districts;
Optional CoMP mode determination module is used for the metrical information according to described UE, determines described UE each optional CoMP mode on each optional time-frequency piece;
The degree determination module is determined data rate and degree when described UE adopts described each optional CoMP mode on described each optional time-frequency piece;
Distribution module, be used for according to described UE adopt described each optional CoMP mode on described each optional time-frequency piece, data rate and degree when on described each optional time-frequency piece, adopting described each optional CoMP mode, for described UE carries out resource allocation.
8. base station according to claim 7 is characterized in that, described optional CoMP mode determination module comprises:
Computing unit, be used for signal that each sub-district that the metrical information according to described UE comprises sends on the downlink channel response information on each available time-frequency piece of this UE, each sub-district each available time-frequency piece at this UE and under described each optional CoMP mode each sub-district signal transmitted to this UE effect, the data rate when calculating described UE and on described each available time-frequency piece, adopting described each available CoMP mode;
Determining unit, be used for if in the data-rate requirements scope of data rate when described UE adopts an available CoMP mode on an available time-frequency piece, determine that then the described CoMP mode of employing is the optional CoMP mode that adopts on the optional time-frequency piece of described UE on the described available time-frequency piece at this UE.
9. base station according to claim 8 is characterized in that, described degree determination module comprises:
Beam shaping CBF degree computing unit, if being used on the described optional time-frequency piece adopting described optional CoMP mode is collaborative beam forming CBF, determine that then described UE is adopting the degree of CBF to be on the optional time-frequency piece: belong to same sub-district with described UE and on identical optional time-frequency piece, adopt the quantity of other UE of CBF;
Relevant Combined Treatment Coherent JP degree computing unit, adopt described optional CoMP mode to be relevant Combined Treatment Coherent JP on the described optional time-frequency piece if be used for calculating, determine that then described UE is adopting the degree of Coherent JP to be on the optional time-frequency piece: on identical optional time-frequency piece, adopt the quantity of other UE of Coherent JP with described UE;
Irrelevant Combined Treatment Non-Coherent JP degree computing unit, to adopt described optional CoMP mode on the described optional time-frequency piece be irrelevant Combined Treatment Non-Coherent JP if be used for calculating, and determines that then described UE is adopting the degree of Non-Coherent JP to be on the optional time-frequency piece: adopt the quantity of other UE of Non-Coherent JP with described UE on identical optional time-frequency piece.
10. base station according to claim 7 is characterized in that, described distribution module comprises:
Allocation units, the data rate when UE that is used for calculating respectively a plurality of unallocated resources adopts each optional CoMP mode on each optional time-frequency piece and the ratio of degree are distributed to the UE that has this maximum ratio with the optional CoMP mode on pairing optional time-frequency piece of maximum ratio and the described time-frequency piece.
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