CN107182057A - A kind of method and apparatus of LTE system medium and small interval cooperation - Google Patents
A kind of method and apparatus of LTE system medium and small interval cooperation Download PDFInfo
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- CN107182057A CN107182057A CN201610134515.XA CN201610134515A CN107182057A CN 107182057 A CN107182057 A CN 107182057A CN 201610134515 A CN201610134515 A CN 201610134515A CN 107182057 A CN107182057 A CN 107182057A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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Abstract
The invention discloses a kind of method and apparatus of LTE system medium and small interval cooperation, methods described includes：Obtain the pre-allocation of resources figure of each cell；A CoMP user is chosen, according to the pre-allocation of resources figure of its serving cell, resource block workable for CoMP user is determined；And select to be disturbed low by cooperation cell in each workable resource block and to coordinate the small resource block of cost be the CoMP user resource block to be taken；Update serving cell and the pre-allocation of resources figure of cooperation cell；Next CoMP user is chosen, and based on the pre-allocation of resources figure of each cell currently updated, repeats said process, the pre-allocation of resources figure of each cell is issued to each cell, carries out Cooperation controlling by the end condition until meeting setting.The problem of present invention can be efficiently solved for the cooperation of CoMP user minizone and interference coordination, reaches the effect for improving frequency efficiency and cell throughout.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of LTE (Long Term Evolution, Long Term Evolution)
The method and apparatus of system medium and small interval cooperation.
Background technology
In LTE system and LTE-A (Long Term Evolution-Advanced, enhanced Long Term Evolution) system evolved
In, for lifting system handling capacity, especially for improving the service quality and handling capacity of cell edge, the cooperation of minizone and
Interference coordination is more and more important.
With being skyrocketed through for 4G user, and 4G user, for the lifting of data rate and data volume demand, 4G is moved
Dynamic network needs significantly lifting system handling capacity and spectrum efficiency.In order to meet above demand, especially in large stadium and
Intensive block, system needs to improve constantly frequency repeat utilization ratio and spectrum efficiency.Operator has built heterogeneous network HetNet, and portion
Affix one's name to the smaller intensive cell of station spacing.
Intensive cell can increase frequency repeat utilization ratio, but also increase the co-channel interference of minizone simultaneously.Particularly with small
Area edge user, can by multiple neighbor cells strong jamming, its user data rate and spectrum efficiency be all very low, user's body
Test poor.In order to solve the problems, such as the strong jamming of edge customer, a series of solution party are proposed in 3GPP LTE and LTE-A standards
Case.
It is that the cooperative information between eNode B is transmitted by X2 interface in current LTE standard and LTE-A standards, bag
Include disturbance load status information, need to switch UE user face data and control information, almost blank subframe pattern (ABS
Pattern, Almost Blank Subframe Pattern) etc..ENode B can be to a certain extent using these information
Carry out also supporting to carry out association of the minizone based on RRM functions by X2 interface in Inter-Cell Interference Coordination, current LTE-A standards
Make, such as by interactive interfacing high interference information, carry out minizone ICIC cooperations；By interactive interfacing ABS pattern information, enter
Row minizone cooperation and interference coordination based on ABS pattern etc..
In current LTE system and lte-a system, information between eNode B, including disturbance load are transmitted by X2 interface
Status information, the almost data and control information for needing switching UE, blank subframe pattern (ABS Pattern, Almost Blank
Subframe Pattern) etc..Inter-Cell Interference Coordination can be carried out to a certain extent using these information, as current
Also support to carry out cooperation of the minizone based on RRM functions by X2 interface in lte-a system, such as believed by interactive interfacing high interference
Breath, carries out minizone ICIC cooperations；By interactive interfacing ABS pattern information, the minizone based on ABS pattern is carried out
Cooperation and interference coordination etc..
But minizone cooperation and interference coordination can not be preferably only carried out by above-mentioned, LTE-A introduces multipoint cooperative again
The problem of (CoMP, Coordinated Multiple Points) preferably to solve inter-cell interference.In CoMP one it is important
Technical scheme be exactly cooperative scheduling (Coordinated Schedule, CS).
For current CS schemes, mainly coordinated using distributed local resource and scheme is evaded in interference.It is i.e. each
Cell is independently scheduled and resource allocation to UE in this cell coverage area, i.e., be parallel scheduling and money between each cell
Source is distributed.Like this, just effectively it can not be cooperateed with and be cooperated between multiple interference cell-of-origins of CoMP user, CoMP is used
The resource coordination at family may be clashed, and cause the resource allocation of CoMP user can not be completely orthogonal, therefore CoMP user
Performance gain can be restricted.Simultaneously as can not be carried out between multiple interference cell-of-origins of CoMP user effective collaboration and
Cooperation, each cell have disabled many Radio Resources for the CoMP user for the interfered cell that cooperates.It so will result in and be
The resource utilization degradation of system, have impact on the entire throughput and performance of system.
The content of the invention
The present invention provides a kind of method and apparatus of LTE system medium and small interval cooperation, to solve CoMP in the prior art
The problem of effective cooperation and interference coordination can not be just carried out between multiple interference cell-of-origins of user.
According to one aspect of the present invention there is provided a kind of method that LTE system medium and small interval cooperates, including：
Step 1, the pre-allocation of resources figure of each cell in collaboration region is obtained；To cell in the pre-allocation of resources figure
The property and state of each resource block are identified, and the property of the resource block includes：Multipoint cooperative CoMP UE resources, common money
Source and resource backup；The state of the resource block is designated unallocated；
Step 2, a CoMP user is chosen in each CoMP user, and according to the pre-allocation of resources figure of its serving cell, really
Resource block workable for the fixed CoMP user；
Step 3, according to the property and state of the resource block of the cooperation cell of the CoMP user, each workable resource is determined
The coordination cost that block is produced by each workable resource block of the interference level of cooperation cell resource block and determination selection, and each
The resource block that selection is disturbed that level is low and coordination cost is small in workable resource block is the CoMP user money to be taken
Source block；
Step 4, the property of the resource block selected in the pre-allocation of resources figure by serving cell is updated to CoMP UE moneys
Source, state are updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with selected resource block
The property of identical resource block is updated to resource backup, state and is updated to distribute；
Step 5, next CoMP user is chosen in each CoMP user, and the resource based on each cell currently updated is divided in advance
Figure, return to step 2, the end condition until meeting setting；
Step 6, the pre-allocation of resources figure that obtained each cell is updated when being up to end condition is issued to respective cell, enters
The Cooperation controlling of each cell of row.
According to another aspect of the present invention there is provided a kind of method that LTE system medium and small interval cooperates, applied to coordinated regions
Each cell in domain, including：
Receive the pre-allocation of resources figure of this cell；
According to the resource allocation conditions of the pre-allocation of resources figure, scheduling of resource is carried out；The scheduling of resource includes：Utilize
The CoMP UE resources distributed in the pre-allocation of resources figure, are scheduled to CoMP user, in the pre-allocation of resources figure points
The resource backup matched somebody with somebody is carried out without scheduling, and using the surplus resources in the pre-allocation of resources figure to non-CoMP user
Scheduling.
According to the third aspect of the invention there is provided the device that a kind of LTE system medium and small interval cooperates, including：
Acquisition module, the pre-allocation of resources figure for obtaining each cell in collaboration region；In the pre-allocation of resources figure
Property and state to each resource block of cell are identified, and the property of the resource block includes：Multipoint cooperative CoMP UE are provided
Source, common resources and resource backup；The state of the resource block is designated unallocated；
Available resources determining module, for choosing a CoMP user in each CoMP user, and according to its serving cell
Pre-allocation of resources figure, determines resource block workable for the CoMP user；
Resource chooses module, for the property and state of the resource block of the cooperation cell according to the CoMP user, it is determined that respectively
Workable resource block is by assisting that each workable resource block of the interference level of cooperation cell resource block and determination selection is produced
Cost is adjusted, and the resource block that selection is disturbed that level is low and coordination cost is small in each workable resource block is the CoMP user
The resource block to be taken；
Update module, the property for the resource block selected in the pre-allocation of resources figure by serving cell is updated to CoMP
UE resources, state are updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with selected money
The property of source block identical resource block is updated to resource backup, state and is updated to distribute；
Iteration module, for choosing next CoMP user in each CoMP user, and based on each cell currently updated
Pre-allocation of resources figure, triggers the available resources determining module, the end condition until meeting setting；
Cooperation controlling module, the pre-allocation of resources figure for being up to each cell that renewal is obtained during end condition is issued to
Respective cell, carries out the Cooperation controlling of each cell.
According to the fourth aspect of the invention there is provided the cell in a kind of LTE system, the cell is in collaboration region
Cell, including：
Receiving module, the pre-allocation of resources figure for receiving this cell；
Scheduler module, for the resource allocation conditions according to the pre-allocation of resources figure, carries out scheduling of resource；The resource
Scheduling includes：Using the CoMP UE resources distributed in the pre-allocation of resources figure, CoMP user is scheduled, to the money
The resource backup distributed in source predistribution figure is without scheduling, and utilizes the surplus resources in the pre-allocation of resources figure, right
Non- CoMP user is scheduled.
The present invention has the beneficial effect that：
Method used in the present invention, can more effectively be solved for CoMP user, minizone cooperation and interference coordination
The problem of, reach the effect for improving frequency efficiency and cell throughout.The present invention can be on the basis of each pre-allocation of resources figure
On, continuous iteration updates pre-allocation of resources figure, gradually approaches optimal pre-allocation of resources effect, that is, takes backup as few as possible
Resource, services more CoMP users.The present invention can be under the throughput demands for meeting CoMP user, occupancy as few as possible
Resource backup, improves the resource utilization of system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only
Some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 divides the schematic diagram of bitmap for Radio Resource property in the present invention；
A kind of flow chart of the method for LTE system medium and small interval cooperation that Fig. 2 provides for the present invention；
Fig. 3 is N_Change computational methods schematic diagrames in the present invention；
Fig. 4 determines to take the pre-allocation of resources figure after updating after resource block for some CoMP user in the present invention；
Fig. 5 divides the pre-allocation of resources figure after being updated after resource for all CoMP users in the present invention；
A kind of structured flowchart of the device for LTE system medium and small interval cooperation that Fig. 6 provides for the present invention；
The structured flowchart of cell in a kind of LTE system that Fig. 7 provides for the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment of the method
The embodiment of the present invention proposes a kind of method of LTE system medium and small interval cooperation, a cycle minizone money more than it
Based on the predistribution of source, according to the user's request of this cycle, iteration, which is more newly arrived, determines this minizone pre-allocation of resources, with as far as possible
Few evades resource to meet the demand of each CoMP user, the problem of solving minizone cooperation and interference coordination.
Specifically, in order to realize scheme that the embodiment of the present invention is proposed, wireless money of the present invention whole system bandwidth
The property in source is divided into three classes：(1) CoMP UE resources, CoMP UE resources are to be pre-assigned to resource used in cell CoMP UE；
(2) resource backup, resource backup is that cell is in resource backup for evading the coordination resource disturbed neighbor cell CoMP UE
On will not send any data；(3) common resources, common resources are to be pre-assigned to resource used in the non-CoMP UE of cell.Such as
It is the schematic diagram that Radio Resource property divides bitmap shown in Fig. 1.Certainly, above-mentioned " resource backup ", " CoMP UE resources " etc.
Entitled description convenient use, those skilled in the art can also be replaced with other titles.
Divided based on above-mentioned resource property, a kind of method of LTE system medium and small interval cooperation provided in an embodiment of the present invention
As shown in Fig. 2 comprising the following steps：
Step S201, obtains the pre-allocation of resources figure of each cell in collaboration region；To small in the pre-allocation of resources figure
The property and state of each resource block in area are identified, and the property of the resource block includes：CoMP UE resources, common resources with
And resource backup；The state of the resource block is designated unallocated；
In the step, the cell in collaboration region includes the serving cell of CoMP user and for the capable and experienced of the CoMP user
Cell is disturbed, it is necessary to evade cooperation in CS schemes, these strong jamming cells are called cooperation cell.
Further, in the step, the pre-allocation of resources figure of each cell in collaboration region is obtained, is specifically included：Detection
Each cell whether there is the pre-allocation of resources figure in a upper cycle, if in the presence of the pre-allocation of resources of the acquisition upper cycle cell
Figure, if being not present, initial resource predistribution figure is created for the cell；The property of each resource block in the initial resource predistribution figure
Matter is designated common resources.
Step S202, chooses a CoMP user in each CoMP user；
Step S203, according to the pre-allocation of resources figure of the serving cell of the CoMP user, determines that the CoMP user can be used
Resource block；
Specifically, in the step, determine that institute is stateful for unappropriated resource in the pre-allocation of resources figure of its serving cell
Block is resource block workable for the CoMP user.
Step S204, according to the property and state of the resource block of the cooperation cell of the CoMP user, is determined each workable
The coordination cost that resource block is produced by each workable resource block of the interference level of cooperation cell resource block and determination selection, and
Selection is disturbed the resource block that level is low and coordination cost is small to be taken for the CoMP user in each workable resource block
Resource block；
In the step, before the selection CoMP user resource block to be taken, it is preferred that first to judge the CoMP user institute
Whether the resource block number needed reaches the upper limit of the CoMP UE total number resources of its serving cell, if, it is determined that current residual
The number of CoMP UE resources is the resource number that the CoMP user is used；Otherwise, it determines the resource block required for the CoMP user
Number is the resource number that the CoMP user is used.
It is determined that after the resource number that the CoMP user is used, according to the resource number of determination, in each workable resource
The selection resource block low with the resource block mutual interference of cooperation cell is the CoMP user resource block to be taken in block.
Further, in the step, it is described in each workable resource block selection be disturbed level it is low and coordinate cost
Small resource block is the CoMP user resource block to be taken, and is preferably realized in the following way：
Based on each workable resource block is by the interference level of cooperation cell resource block and selects each workable resource
The coordination cost that block is produced, according to the ordering strategy of setting, priority ranking is carried out to each workable resource block；According to preferential
Level order, selects the CoMP user resource block to be taken in each workable resource block.
It is on the contrary then priority is higher specifically, it is lower to be disturbed level more high priority, coordinate cost more high priority more
It is low, it is on the contrary then priority is higher.
It should be noted that after obtaining being disturbed level and coordinating cost, those skilled in the art can be based on two
Parameter, according to self-demand sets itself ordering strategy (sort algorithm), for example, the level of being disturbed and coordination can be given respectively
The different weight of cost asks the two and value etc., can be flexible according to demand for specific sort algorithm those skilled in the art
Setting, the present invention is not limited uniquely it.
Further, in the step, determine each workable resource block by the interference level of cooperation cell resource block, bag
Include：
For each workable resource block in serving cell, determine in each cooperation cell with the workable resource block phase
The property and state of same resource block；
It is that CoMP UE resources, state are allocated each cooperation that CoMP user, which is asked for, by the property of the resource block determined
The power and value of the interference signal of cell, obtain the interference level that the workable resource block is disturbed by each cooperation cell；
Further, in the step, it is determined that the coordination cost that each workable resource block of selection is produced, including：
For each workable resource block in serving cell, α is entered as according to unappropriated common resources, unappropriated
Resource backup is entered as being less than the mark that α, unappropriated CoMP UE resources are entered as being entered as setting more than α, allocated resource
The principle of quasi- value, to carrying out assignment with the workable resource block identical resource block in each cooperation cell, asks for each cooperation small
The resource block assignment and value in area, obtains the coordination cost of the workable resource block；Wherein, unappropriated common resources, standby
The assignment of part resource and CoMP UE resources is all higher than the standard value.
Step S205, the property of the resource block selected in pre-allocation of resources figure by serving cell is updated to CoMP UE
Resource, state are updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with selected resource
The property of block identical resource block is updated to resource backup, state and is updated to distribute；
Step S206, chooses next CoMP user in each CoMP user, and based on the resource of each cell currently updated
Predistribution figure, return to step S203, the end condition until meeting setting；
Wherein, the end condition of setting includes：In collaboration region the CoMP user number of resources of each cell reach the upper limit or
CoMP user has been carried out pre-allocation of resources.
Step S207, the pre-allocation of resources figure for each cell that renewal is obtained is issued to corresponding small when being up to end condition
Area, carries out the Cooperation controlling of each cell.
Preferably, before down distributing resource predistribution figure, the resource that obtained each cell is updated when being up to end condition is pre-
In distribution diagram the stateful property for unappropriated resource block be all updated to common resources, state and be all updated to distribute.
Further, the embodiment of the present invention also proposes a kind of method of LTE system medium and small interval cooperation, applied to coordinated regions
Each cell in domain, comprises the following steps：
Step 1, the pre-allocation of resources figure of this cell is received；
Step 2, according to the resource allocation conditions of the pre-allocation of resources figure, scheduling of resource is carried out；The scheduling of resource bag
Include：Using the CoMP UE resources distributed in the pre-allocation of resources figure, CoMP user is scheduled, the resource is divided in advance
The resource backup distributed in figure is without scheduling, and utilizes the surplus resources in the pre-allocation of resources figure, to non-CoMP
User is scheduled.
In summary, method used in the present invention, can more effectively be solved for CoMP user, minizone cooperation and
The problem of interference coordination, reach the effect for improving frequency efficiency and cell throughout.The present invention can be in each pre-allocation of resources
On the basis of figure, continuous iteration updates pre-allocation of resources figure, gradually approaches optimal pre-allocation of resources effect, that is, takes as far as possible
Few resource backup, services more CoMP users.The present invention can be under the throughput demands for meeting CoMP user, as far as possible
Few occupancy resource backup, improves the resource utilization of system.
For a clearer preferred embodiment for illustrating the present invention, the present invention being given below, the embodiment is by draping over one's shoulders
Reveal more ins and outs, more detailed explanation is carried out to the method for the invention.It is pointed out that disclosed in the present embodiment
Ins and outs user explains the present invention, not unique to limit the present invention.
The method for a kind of minizone cooperation that this example is provided, it is adaptable to GSM, especially lte-a system.
It is discussed in detail with reference to specific steps.The specific implementation step of the example is as follows：
In the present embodiment, if the strong jamming cell of CoMP user common n, respectively CoCell1, CoCell2 ..., then claim this
A little strong jamming cells are cooperation cell.
Preliminary step：If there is the pre-allocation of resources figure of the pre-allocation of resources figure in a upper cycle, above a cycle in cell
Based on, if being not present, all resource blocks in initial resource predistribution figure, initial resource predistribution figure are set up to cell
Property is all designated as " common resources ".The resource block and the resource block of upper cycle pre-allocation of resources figure of initial resource predistribution figure
Flag (state that can be understood as resource block) is denoted as " do not update and (can be understood as unallocated) ".
The first step：CoMP user is chosen according to the priority of CoMP user.
Second step：Calculating each usable resource block of the CoMP user, (i.e. the flag of its serving cell SerCell is
The resource block of " not updating ") be disturbed horizontal IL.The interference level IL of m-th of resource block is calculated as follows：
Wherein：
I (k) is the power of the interference signal for the cooperation cell k that the CoMP user is subject to.
3rd step：(i.e. its serving cell SerCell flag is " not to each usable resource block of calculating CoMP user
The resource block of renewal ") corresponding coordination work factor.
Wherein, coordinating work factor can be calculated by that need to change number of resource blocks N_change (m).
It can be used that resource block RBG (m) is corresponding need to change number of resource blocks N_change for m-th of the CoMP user
(m) the resource number sum changed is needed on resource block RBG (m) by the cooperation cell of the CoMP user：
Wherein, Mchange (k) needs to change resource number for k-th of cooperation cell of the CoMP user.
Change resource number Mchange (k) is needed to count as follows for k-th of cooperation cell of the CoMP user
Calculate：
If the flag on the resource block RBG (m) of the cooperation cell of the CoMP user is " renewal ", Mchange (k)
Taking in the standard value of setting, the present embodiment makes it take 0.
If the flag on the resource block RBG (m) of k-th of cooperation cell of the CoMP user is " not updating "：
If resource block RBG (m) property is " common resources ", Mchange (k), which is taken in α, the present embodiment, makes it take 1；
If resource block RBG (m) property is " resource backup ", Mchange (k) takes γ；Wherein, γ is less than 1 just
Number；
If resource block RBG (m) property is " CoMP UE resources ", Mchange (k) takes u；Wherein, u is more than 1 just
Number.
That is, for some usable resource block of CoMP user, if should in the pre-allocation of resources figure of cooperation cell
Resource block is that " resource backup " (i.e. upper cycle resource block is also that as evading resource, the cell does not dispatch the resource typically
Block), then when this calculates coordination work factor, take the less factor so that the CoMP user tends to take the resource block；If association
It is that " CoMP UE resources " (i.e. upper cycle resource block is as the cell to make the resource block in the pre-allocation of resources figure of cell
Some CoMP user resource block), then this calculate coordinate work factor when, take the larger factor so that the CoMP user
Trend is not take up the resource block；If the resource block is " common resources " (i.e. upper cycle in the pre-allocation of resources figure of cooperation cell
The resource block is the general resource of the cell, and (other cell coordinations are not needed for dispatching the non-CoMP user of non-CoMP user
The UE of cooperation)), then when this calculates coordination work factor, take the moderate factor so that the CoMP user is to taking the resource block
Taxis it is moderate.
It is illustrated below：
For serving Cell some CoMP UE, there are RBG 1, RBG 2, RBG3, RBG 4 in Serving Cell
It is that resource can be used Deng 4 RBG.The interfered cell of the CoMP user is Cell1, Cell 2, Cell 3.Its resource type is distributed
As shown in Figure 3.
Current state is：
Serving cell all RBG are common resources；
Cell11~cell3 RBG1 flag is " renewal ":Cell 1 RBG1 has been updated to CoMP UE resources,
Cell 2, cell3 have been updated to resource backup；
Cell11~cell3 RBG2~RBG4 flag is " not updating ".
So in figure 3, for RBG 1, Cell1 corresponding is that flag is " renewal " " CoMP UE resources ", Cell
2 and Cell 3 corresponding is that flag is " renewal " " resource backup ", then for RBG 1, N_Change (1) size is
0。
For RBG 2, Cell1 and Cell3 it is corresponding be flag be " not updating " " resource backup ", Cell2 is corresponding
It is " common resources " that flag is " not updating ".Therefore, for RBG 2, N_Change (2) size is 1+2 γ.
For RBG 3, Cell1 and Cell 2 it is corresponding be flag be " not updating " " common resources ", the correspondences of Cell 3
Be flag be " not updating " " CoMP UE resources ".Therefore, for RBG 3, N_Change (3) size is 2+u.
For RBG 4, it is all " common resources " that flag is " not updating " that Cell1, Cell 2 be corresponding with Cell3.Cause
This, for RBG 4, N_Change (4) size is 3.
4th step：Interference level the amount IL_RBG and N_change on resource block can be used according to each, to CoMP user
Resource block can be used to carry out priority ranking.
5th step：" the CoMP UE moneys of resource block number and CoMP user serving cell according to needed for the CoMP user
Source " the sum upper limit, determines the resource number that the CoMP user is used.
The resource number that the CoMP user is used in the step is：
Min (the resource block number needed for the CoMP user, current residue " CoMP UE resources " number)
Wherein, remaining " CoMP resources " number is equal to " CoMP UE resources " sum of the CoMP user serving cell at present
The upper limit subtracts that property be " CoMP UE resources " in the resource allocation map of the current CoMP user serving cell and flag is " more
Number of resource blocks sum newly ".
6th step：The resource block number used according to the CoMP user, according to the resource block priority orders of the 4th step, is accounted for
Corresponding resource block is used, and updates pre-allocation of resources figure.
Update pre-allocation of resources figure operation be：These resource blocks i for determining to take for the CoMP user, by the CoMP
These resource blocks i of the serving cell of user property is updated to " CoMP UE resources " and flag is updated to " renewal ", for
These resource blocks i in the cooperation cell of the CoMP user, by the property of the resource block that flag does not update in these resource blocks i more
New is " resource backup " and flag is updated to " renewal ".
Assuming that the CoMP user in the 3rd step is determined in the 6th step using resource block RBG2, then updated in the 6th step
The pre-allocation of resources figure arrived is as shown in Figure 4.I.e.：The resource block RBG2 for determining to take for the CoMP user, by the CoMP user
The resource block RBG2 property of serving cell be updated to " CoMP UE resources " and flag is updated to " renewal ", and should
Property is updated to " resource backup " and flag for the resource block RBG2 of " common resources " property in the cooperation cell of CoMP user
It is updated to " renewal ", property keeps for the resource block RBG2 properties of " CoMP UE resources " in the cooperation cell of the CoMP user
It is constant.The flag that property is " resource backup " in the cooperation cell of the CoMP user, flag is the resource block RBG2 not updated is more
New is to have updated.
7th step：The each CoMP user of correspondence repeats above-mentioned second step to the 6th step, until the CoMP user of each cell is provided
Source number reaches that the upper limit or CoMP user have been made pre-allocation of resources occupancy.
8th step：Update pre-allocation of resources figure.By all flag in the pre-allocation of resources figure of each cell for " not more
The property of resource block newly " is all updated to " common resources ", and flag is updated to " renewal ".
Assuming that the CoMP user in the 3rd step is the CoMP user for finally needing to divide resource, and for the CoMP user,
Determined in the 6th step using resource block RBG2, then final updating pre-allocation of resources figure is as shown in Figure 5.
9th step：Pre-allocation of resources figure is sent to each cell by Centralized Controller.Each cell is according to pre-allocation of resources
Figure, is scheduled to common UE and CoMP user and to the CoMP user progress resource avoidance for other cells for needing to coordinate.
The title of heretofore described " common resources ", " resource backup ", " CoMP UE resources " only as an example, with
Just understand；It can be indicated with other such as " A classes ", " B classes ", " C classes " titles.
The present invention can be on the basis of each pre-allocation of resources figure, and continuous iteration updates pre-allocation of resources figure, gradually forces
Nearly optimal pre-allocation of resources effect, that is, take resource backup as few as possible, services more CoMP users.The present invention can be with
Under the throughput demands for meeting CoMP user, it is only possible to few occupancy resource backup, the resource utilization of system is improved.
Device embodiment
The embodiment of the present invention provides a kind of device of LTE system medium and small interval cooperation, and the device is a kind of Centralized Controller,
As shown in fig. 6, described device includes：
Acquisition module 610, the pre-allocation of resources figure for obtaining each cell in collaboration region；The pre-allocation of resources figure
In the property and state of each resource block of cell are identified, the property of the resource block includes：Multipoint cooperative CoMP UE are provided
Source, common resources and resource backup；The state of the resource block is designated unallocated；
Available resources determining module 620, for choosing a CoMP user in each CoMP user, and according to its serving cell
Pre-allocation of resources figure, determine resource block workable for the CoMP user；
Resource chooses module 630, for the property and state of the resource block of the cooperation cell according to the CoMP user, it is determined that
Each workable resource block is produced by each workable resource block of the interference level of cooperation cell resource block and determination selection
Coordinate cost, and the resource block that selection is disturbed that level is low and coordination cost is small in each workable resource block is that the CoMP is used
The family resource block to be taken；
Update module 640, the property for the resource block selected in the pre-allocation of resources figure by serving cell is updated to
CoMP UE resources, state are updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with it is selected
The property for the resource block identical resource block selected is updated to resource backup, state and is updated to distribute；
Iteration module 650, for choosing next CoMP user in each CoMP user, and based on each cell currently updated
Pre-allocation of resources figure, trigger the available resources determining module, the end condition until meeting setting；
Cooperation controlling module 660, for being up to during end condition under the pre-allocation of resources figure for each cell that renewal is obtained
Respective cell is dealt into, the Cooperation controlling of each cell is carried out.
Based on said structure framework and implementation principle, several specific and sides of being preferable to carry out under the above constitution are given below
Formula, the function to refine and optimize device of the present invention, so that the implementation of the present invention program is more convenient, accurately.Specifically relate to
And following content：
In the present embodiment, acquisition module 610, specifically for detecting that each cell whether there is the pre-allocation of resources in a upper cycle
Figure, if in the presence of the pre-allocation of resources figure of the acquisition upper cycle cell, if being not present, initial resource is created for the cell
Predistribution figure；The property of each resource block is designated common resources in the initial resource predistribution figure.
Further, in the embodiment of the present invention, available resources determining module 620 is used specifically for the CoMP for determining to choose
All resource bulk states are that unappropriated resource block is that the CoMP user can be used in the pre-allocation of resources figure of the serving cell at family
Resource block.
Further, in the embodiment of the present invention, resource chooses module 630, further comprises：
Sorting sub-module, for the interference level based on each workable resource block by cooperation cell resource block and selection
The coordination cost that each workable resource block is produced, according to the ordering strategy of setting, row major is entered to each workable resource block
Level sequence；
Resource block chooses submodule, for according to priority orders, selecting the CoMP to use in each workable resource block
The family resource block to be taken.
Further, in the embodiment of the present invention, resource chooses module 630, further comprises：
Interference level calculating sub module, for for each workable resource block in serving cell, determining that each cooperation is small
The property and state of the Qu Zhongyu workable resource block identical resource blocks；CoMP user is asked for by the resource block determined
The power and value for the interference signal that property is CoMP UE resources, state is allocated each cooperation cell, obtain this workable
The interference level that resource block is disturbed by each cooperation cell；
Coordinate cost calculation sub-module, for for each workable resource block in serving cell, according to unappropriated
Common resources are entered as α, unappropriated resource backup and are entered as being entered as more than α, less than α, unappropriated CoMP UE resources
The resource of distribution be entered as setting standard value principle, in each cooperation cell with the workable resource block identical resource
Block carries out assignment, asks for the resource block assignment and value of each cooperation cell, obtains the coordination cost of the workable resource block；Its
In, the assignment of unappropriated common resources, resource backup and CoMP UE resources is all higher than the standard value.
Further, it is each workable in the serving cell that interference level calculating sub module is obtained in the embodiment of the present invention
The interference level that resource block is disturbed by each cooperation cell isIn formula：
N is the number of cooperation cell；I (k) is the power of the interference signal for the cooperation cell k that the CoMP user chosen is subject to.
Further, in the embodiment of the present invention, coordinate respectively make in the selection serving cell that cost calculation sub-module is obtained
Resource block produce coordination cost be
If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks
To have distributed, then Mchange (k) takes the standard value of setting；
If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks
To be unallocated, then：
When the property of resource block is common resources, then Mchange (k) takes α；
When the property of resource block is resource backup, then Mchange (k) takes γ；Wherein, γ is less than α；
When the property of resource block is CoMP UE resources, then Mchange (k) takes u；Wherein, u is more than α.
Further, in the embodiment of the present invention, resource is chosen module 630 and selected in workable resource before resource, also
Whether the resource block number required for judging the CoMP user reaches the upper limit of the CoMP UE total number resources of its serving cell,
If, it is determined that the number of current residual CoMP UE resources is the resource number that the CoMP user is used；Otherwise, it determines should
Resource block number required for CoMP user is the resource number that the CoMP user is used；According to the resource number of determination, each
The selection resource block low with the resource block mutual interference of cooperation cell is the CoMP user money to be taken in workable resource block
Source block.
Further, in the embodiment of the present invention, the end condition set in iteration module 650 includes：It is each in collaboration region
The CoMP user number of resources of cell reaches that the upper limit or CoMP user have been carried out pre-allocation of resources.
Further, in the embodiment of the present invention, Cooperation controlling module 660 updates specifically for being up to during end condition
In the pre-allocation of resources figure of obtained each cell the stateful property for unappropriated resource block be all updated to common resources, shape
State is all updated to distribute, and the pre-allocation of resources figure of each cell after renewal is issued into respective cell.
The embodiment of the present invention also provides the cell in a kind of LTE system, and the cell is the cell in collaboration region, is such as schemed
Shown in 7, including：
Receiving module 710, the pre-allocation of resources figure for receiving this cell；
Scheduler module 720, for the resource allocation conditions according to the pre-allocation of resources figure, carries out scheduling of resource；It is described
Scheduling of resource includes：Using the CoMP UE resources distributed in the pre-allocation of resources figure, CoMP user is scheduled, to institute
The resource backup distributed in pre-allocation of resources figure is stated without scheduling, and utilizes the remaining money in the pre-allocation of resources figure
Source, is scheduled to non-CoMP user.
In summary, device of the present invention, can more effectively be solved for CoMP user, minizone cooperation and interference
The problem of coordination, reach the effect for improving frequency efficiency and cell throughout.The present invention can be in each pre-allocation of resources figure
On the basis of, continuous iteration updates pre-allocation of resources figure, gradually approaches optimal pre-allocation of resources effect, that is, takes as few as possible
Resource backup, services more CoMP users.The present invention can be as few as possible under the throughput demands for meeting CoMP user
Resource backup is taken, the resource utilization of system is improved.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is its difference with other embodiment.Particularly with device
For embodiment, due to its substantially similar and embodiment of the method, so, description it is fairly simple, related part is real referring to method
Apply the part explanation of example.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
In a word, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (20)
1. a kind of method of LTE system medium and small interval cooperation, it is characterised in that including：
Step 1, the pre-allocation of resources figure of each cell in collaboration region is obtained；To each money of cell in the pre-allocation of resources figure
The property and state of source block are identified, and the property of the resource block includes：Multipoint cooperative CoMP UE resources, common resources with
And resource backup；The state of the resource block is designated unallocated；
Step 2, a CoMP user is chosen in each CoMP user, and according to the pre-allocation of resources figure of its serving cell, it is determined that should
Resource block workable for CoMP user；
Step 3, according to the property and state of the resource block of the cooperation cell of the CoMP user, determine each workable resource block by
The interference level of cooperation cell resource block and the coordination cost for determining each workable resource block generation of selection, and can respectively make
The resource block that selection is disturbed that level is low and coordination cost is small in resource block is the CoMP user resource block to be taken；
Step 4, the property of the resource block selected in the pre-allocation of resources figure by serving cell is updated to CoMPUE resources, state
Be updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with selected resource block identical
The property of resource block is updated to resource backup, state and is updated to distribute；
Step 5, next CoMP user is chosen in each CoMP user, and based on the pre-allocation of resources of each cell currently updated
Figure, return to step 2, the end condition until meeting setting；
Step 6, the pre-allocation of resources figure that obtained each cell is updated when being up to end condition is issued to respective cell, carries out each
The Cooperation controlling of cell.
2. the method as described in claim 1, it is characterised in that the pre-allocation of resources of each cell in the acquisition collaboration region
Figure, including：
Detected that each cell whether there is the pre-allocation of resources figure in a upper cycle, if in the presence of the money of the acquisition upper cycle cell
Source predistribution figure, if being not present, initial resource predistribution figure is created for the cell；Respectively provided in the initial resource predistribution figure
The property of source block is designated common resources.
3. the method as described in claim 1, it is characterised in that the pre-allocation of resources figure according to its serving cell, it is determined that
Resource block workable for the CoMP user, is specifically included：Determine that all resources are block in the pre-allocation of resources figure of its serving cell
State is that unappropriated resource block is resource block workable for the CoMP user.
4. the method as described in claim 1, it is characterised in that the selection in each workable resource block is disturbed level
It is low and to coordinate the small resource block of cost be the CoMP user resource block to be taken, specifically include：
Based on each workable resource block is by the interference level of cooperation cell resource block and selects each workable resource block to produce
Raw coordination cost, according to the ordering strategy of setting, priority ranking is carried out to each workable resource block；
According to priority orders, the CoMP user resource block to be taken is selected in each workable resource block.
5. the method as described in Claims 1-4 any one, it is characterised in that each workable resource block of the determination by
The interference level of cooperation cell resource block, including：
For each workable resource block in serving cell, determine in each cooperation cell with the workable resource block identical
The property and state of resource block；
It is that CoMP UE resources, state are allocated each cooperation cell that CoMP user, which is asked for, by the property of the resource block determined
Interference signal power and value, obtain the interference level that the workable resource block is disturbed by each cooperation cell；
And/or, the coordination cost for determining each workable resource block generation of selection, including：
For each workable resource block in serving cell, α, unappropriated backup are entered as according to unappropriated common resources
Resource is entered as being less than the standard value that α, unappropriated CoMP UE resources are entered as being entered as setting more than α, allocated resource
Principle, to carrying out assignment with the workable resource block identical resource block in each cooperation cell, ask for each cooperation cell
Resource block assignment and value, obtain the coordination cost of the workable resource block；Wherein, unappropriated common resources, backup money
The assignment of source and CoMP UE resources is all higher than the standard value.
6. method as claimed in claim 5, it is characterised in that
Each workable resource block determined is by the interference level of cooperation cell resource block：
In formula：
N is the number of cooperation cell；I (k) is the power of the interference signal for the cooperation cell k that the CoMP user chosen is subject to；
The coordination cost of resource block generation is workable for the selection of determination is each：
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If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks is
Distribution, then Mchange (k) takes the standard value of setting；
If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks is not
Distribution, then：
When the property of resource block is common resources, then Mchange (k) takes α；
When the property of resource block is resource backup, then Mchange (k) takes γ；Wherein, γ is less than α；
When the property of resource block is CoMP UE resources, then Mchange (k) takes u；Wherein, u is more than α.
7. the method as described in Claims 1-4,6 any one, it is characterised in that described in each workable resource block
It is the CoMP user resource block to be taken that selection, which is disturbed the resource block that level is low and coordination cost is small, is specifically included：
Whether the resource block number required for judging the CoMP user reaches the upper of the CoMP UE total number resources of its serving cell
Limit, if, it is determined that the number of current residual CoMP UE resources is the resource number that the CoMP user is used；Otherwise, it determines should
Resource block number required for CoMP user is the resource number that the CoMP user is used；
According to the resource number of determination, selection is disturbed the resource that level is low and coordination cost is small in each workable resource block
Block is the CoMP user resource block to be taken.
8. the method as described in claim 1, it is characterised in that the end condition of the setting includes：It is each small in collaboration region
The CoMP user number of resources in area reaches that the upper limit or CoMP user have been carried out pre-allocation of resources.
9. the method as described in Claims 1-4,6,8 any one, it is characterised in that the step 6 is specifically included：It will reach
To updated during end condition in the obtained pre-allocation of resources figure of each cell the stateful property for unappropriated resource block all
It is updated to common resources, state to be all updated to distribute, and the pre-allocation of resources figure of each cell after renewal is issued to correspondence
Cell.
10. a kind of method of LTE system medium and small interval cooperation, it is characterised in that applied to each cell in collaboration region, bag
Include：
Receive the pre-allocation of resources figure of this cell；
According to the resource allocation conditions of the pre-allocation of resources figure, scheduling of resource is carried out；The scheduling of resource includes：Using described
The CoMP UE resources distributed in pre-allocation of resources figure, are scheduled to CoMP user, to what is distributed in the pre-allocation of resources figure
Resource backup is scheduled without scheduling, and using the surplus resources in the pre-allocation of resources figure to non-CoMP user.
11. a kind of device of LTE system medium and small interval cooperation, it is characterised in that including：
Acquisition module, the pre-allocation of resources figure for obtaining each cell in collaboration region；To small in the pre-allocation of resources figure
The property and state of each resource block in area are identified, and the property of the resource block includes：CoMP UE resources, common resources with
And resource backup；The state of the resource block is designated unallocated；
Available resources determining module, for choosing a CoMP user in each CoMP user, and according to the resource of its serving cell
Predistribution figure, determines resource block workable for the CoMP user；
Resource chooses module, for the property and state of the resource block of the cooperation cell according to the CoMP user, it is determined that can respectively make
The coordination generation that resource block is produced by each workable resource block of the interference level of cooperation cell resource block and determination selection
Valency, and in each workable resource block selection to be disturbed level low and coordinate the small resource block of cost and wanted by the CoMP user
The resource block of occupancy；
Update module, the property for the resource block selected in the pre-allocation of resources figure by serving cell is updated to CoMP UE
Resource, state are updated to distribute, and by it is workable in the pre-allocation of resources figure of each cooperation cell, with selected resource
The property of block identical resource block is updated to resource backup, state and is updated to distribute；
Iteration module, for choosing next CoMP user in each CoMP user, and based on the resource of each cell currently updated
Predistribution figure, triggers the available resources determining module, the end condition until meeting setting；
Cooperation controlling module, correspondence is issued to for being up to the pre-allocation of resources figure of each cell that renewal is obtained during end condition
Cell, carries out the Cooperation controlling of each cell.
12. device as claimed in claim 11, it is characterised in that the acquisition module, specifically for whether detecting each cell
There is the pre-allocation of resources figure in a upper cycle, if in the presence of the pre-allocation of resources figure of the acquisition upper cycle cell, if not depositing
Then initial resource predistribution figure is being created for the cell；The property of each resource block is identified in the initial resource predistribution figure
For common resources.
13. device as claimed in claim 11, it is characterised in that the available resources determining module, specifically for determining to select
All resource bulk states are that unappropriated resource block is the CoMP in the pre-allocation of resources figure of the serving cell of the CoMP user taken
Resource block workable for user.
14. device as claimed in claim 11, it is characterised in that the resource chooses module, further comprises：
Sorting sub-module, for respectively may be used based on each workable resource block by the interference level of cooperation cell resource block and selection
The coordination cost that the resource block used is produced, according to the ordering strategy of setting, priority row is carried out to each workable resource block
Sequence；
Resource block chooses submodule, for according to priority orders, the CoMP user institute to be selected in each workable resource block
The resource block to be taken.
15. the device as described in claim 11 to 14 any one, it is characterised in that the resource chooses module, specific bag
Include：
Interference level calculating sub module, for for each workable resource block in serving cell, determining in each cooperation cell
With the property and state of the workable resource block identical resource block；Ask for property of the CoMP user by the resource block determined
For the power and value of interference signal that CoMP UE resources, state are allocated each cooperation cell, the workable resource is obtained
The interference level that block is disturbed by each cooperation cell；
Coordinate cost calculation sub-module, for for each workable resource block in serving cell, according to unappropriated common
Resource is entered as α, unappropriated resource backup and is entered as being entered as being more than α less than α, unappropriated CoMP UE resources, has distributed
Resource be entered as setting standard value principle, to entering in each cooperation cell with the workable resource block identical resource block
Row assignment, asks for the resource block assignment and value of each cooperation cell, obtains the coordination cost of the workable resource block；Wherein,
The assignment of unappropriated common resources, resource backup and CoMP UE resources is all higher than the standard value.
16. device as claimed in claim 15, it is characterised in that it is each usable that the interference level calculating sub module is obtained
Resource block be by the interference level of each cooperation cell resource block：
In formula：
N is the number of cooperation cell；I (k) is the power of the interference signal for the cooperation cell k that the CoMP user chosen is subject to；
It is described to coordinate the coordination cost that each workable resource block of selection that cost calculation sub-module obtains produces and be：
If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks is
Distribution, then Mchange (k) takes the standard value of setting；
If the state in k-th of cooperation cell of the CoMP user chosen with workable resource block m identical resource blocks is not
Distribution, then：
When the property of resource block is common resources, then Mchange (k) takes α；
When the property of resource block is resource backup, then Mchange (k) takes γ；Wherein, γ is less than α；
When the property of resource block is CoMP UE resources, then Mchange (k) takes u；Wherein, u is more than α.
17. the device as described in claim 11 to 14,16 any one, it is characterised in that the resource chooses module, specifically
Whether the resource block number required for for judging the CoMP user reaches the CoMP UE total number resources of its serving cell
Limit, if, it is determined that the number of current residual CoMP UE resources is the resource number that the CoMP user is used；Otherwise, it determines should
Resource block number required for CoMP user is the resource number that the CoMP user is used；According to the resource number of determination, each
The resource block that selection is disturbed that level is low and coordination cost is small in workable resource block is the CoMP user money to be taken
Source block.
18. device as claimed in claim 11, it is characterised in that the end condition set in the iteration module includes：Association
The CoMP user number of resources for making each cell in region reaches that the upper limit or CoMP user have been carried out pre-allocation of resources.
19. the device as described in claim 11 to 14,16,18 any one, it is characterised in that the Cooperation controlling module,
Specifically for being up to during end condition, institute is stateful for unappropriated money in the pre-allocation of resources figure for each cell that renewal is obtained
The property of source block is all updated to common resources, state and is all updated to distribute, and by the pre-allocation of resources of each cell after renewal
Figure is issued to respective cell.
20. the cell in a kind of LTE system, it is characterised in that the cell is the cell in collaboration region, including：
Receiving module, the pre-allocation of resources figure for receiving this cell；
Scheduler module, for the resource allocation conditions according to the pre-allocation of resources figure, carries out scheduling of resource；The scheduling of resource
Including：Using the CoMP UE resources distributed in the pre-allocation of resources figure, CoMP user is scheduled, it is pre- to the resource
The resource backup distributed in distribution diagram is without scheduling, and utilizes the surplus resources in the pre-allocation of resources figure, to non-
CoMP user is scheduled.
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| PCT/CN2017/071601 WO2017152719A1 (en) | 2016-03-10 | 2017-01-18 | Inter-cell coordination method and device in lte system, and computer storage medium |
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|---|---|
| CN107182057B (en) | 2022-12-02 |
| WO2017152719A1 (en) | 2017-09-14 |
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