CN105307275B - A kind of downlink CoMP resource allocation methods - Google Patents
A kind of downlink CoMP resource allocation methods Download PDFInfo
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- CN105307275B CN105307275B CN201410227005.8A CN201410227005A CN105307275B CN 105307275 B CN105307275 B CN 105307275B CN 201410227005 A CN201410227005 A CN 201410227005A CN 105307275 B CN105307275 B CN 105307275B
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Abstract
This application discloses a kind of downlinks to cooperate with multiple spot (CoMP) resource allocation methods, the band downlink resource of cell is divided into CoMP frequency range and common frequency range, wherein CoMP frequency range is divided into 3 sections, neighboring community selects primary CoMP frequency range of the different CoMP frequency ranges as this cell, non-primary CoMP frequency range of other CoMP frequency ranges as this cell；For common frequency range, the ordinary user for being preferentially supplied to this cell is used；CoMP user and the use priority of collaborative user are below ordinary user, and wherein CoMP user is prior to collaborative user；For primary CoMP frequency range, the CoMP user for being preferentially supplied to this cell is used；For non-primary CoMP frequency range, the collaborative user for being preferentially supplied to the primary CoMP frequency range in neighboring community is used；The CoMP user for being provided secondarily to this cell uses and other collaborative users use；Ordinary user is minimum using the priority of CoMP frequency range.
Description
Technical field
This application involves wireless communication technology field more particularly to a kind of downlink CoMP resource allocation methods.
Background technique
During the technical discussion of LTE evolution (LTE-A), there is a kind of utilization click-through separated on geographical location
Row collaboration is sent or received method, and 3GPP is called collaboration multiple spot technology (CoMP, Coordinated Multi-Point
Transmission/Reception).CoMP be as the covering of improvement high data rate, cell edge throughput and
(or) tool that improves throughput of system introduces LTE-A.
CoMP is that a kind of multiple points carry out cooperative transmission/received technology, due to its can using distributed antenna and
The control function of centralization can be easy to progress semi and arrange net.As shown in Figure 1, many access points are all connected to together
One base station (eNodeB), and each access point may include one or more bay.For user equipment (UE)
For, multiple UE can carry out the transmission of data with multiple access points simultaneously, and these access points may belong to the same base station
Or different base station.In the transmission process of data, master controller receives the transmission information of each access point, including letter
Road quality, transmitted data rates etc. determine to make scheduling, distribute resource to meet the QoS need of each user, business
It asks, and maximizes the throughput performance of whole system.Since cordless communication network is larger, all base stations cooperate progress completely
It is high to transmit complexity, as a consequence it is hardly possible to realize, therefore cells all in communication network are generally divided into several cooperative clusters, appoint
One cell only cooperates with same cluster cell, forms the multi-cell cooperation system based on clustering architecture.
In general, downlink CoMP, which refers to, carries out cooperative transmission in multiple geographically separated transfer points, main includes such as
Lower two kinds of implementations:
Mode one: Combined Treatment (Joint Processing).
Which can be further divided into two kinds again:
Joint transmission (Joint Transmission): multiple transmission point (cell) carries out PDSCH simultaneously for the same UE
Transmission, can increase signal transmission quality or reduce activation interference level.
For such CoMP mode, synchronization can be the same UE or multiple UE by multiple transmission point (cell) into
Row transmission, in this manner it is possible to by the Combined Treatment between multiple and different cells, and combine transmission to improve UE for it
The quality of reception of own signal can effectively inhibit to interfere.It, can be how defeated using CoMP single user multi input by such mode
The technology of (CoMP-SU-MIMO) or CoMP multi-user's multiple-input and multiple-output (CoMP-MU-MIMO) carries out joint transmission out.
Dynamic cell selection (Dynamic Cell Selection): it is concentrated in CoMP operation, one cell of dynamic select
The transmission of PDSCH is carried out, the same moment only allows a cell to be transmitted.The CoMP operation collection refers to
The set for the transfer point that CoMP UE carries out data transmission.CoMP operation collection is the subset of cooperative cluster.
For such CoMP, synchronization, which only has a transfer point (cell), can be transmitted UE, but can lead to
It crosses fast cell selection and is flexibly determined as the cell that UE carries out data transmission, effectively improve the performance of total system.
Mode two: cooperative scheduling/beam shaping (Coordinated Scheduling/Beamforming).
Only serving cell can carry out the transmission of data, and dispatch, the decision of beam shaping is then to pass through CoMP operation
What whole cells of concentration were made jointly.
In the prior art, CoMP resource allocation mainly uses joint ratio fair scheduling scheme.In this scenario, not into
The division of line frequency section, but measure each resource block (RB, Resource Block) and passed under CoMP transmission mode with single cell
Then superiority and inferiority under defeated mode selects the transmission mode of the RB.Joint ratio fair scheduling scheme makes Cell Center User and small
Area edge user has the chance of equality to go using radio resource, but this method is only applicable to the nonoverlapping cell of cooperative cluster (such as
If fruit cooperative cluster is overlapped, can not determine which cluster use the RB gives), thus obtained throughput gain is limited.Cooperation
Cluster, which is not overlapped, refers to that a cell is not simultaneously in two cooperative clusters.
Summary of the invention
This application provides a kind of downlink CoMP resource allocation methods, can not be limited by whether cooperative cluster is overlapped, and
And by resource shared by reasonable distribution CoMP, throughput of system is improved.
A kind of downlink CoMP resource allocation methods that the embodiment of the present application embodiment provides, by the band downlink resource of cell
It is divided into CoMP frequency range and common frequency range, wherein CoMP frequency range is divided into 3 sections, and neighboring community selects different CoMP frequency ranges small as this
The primary CoMP frequency range in area, non-primary CoMP frequency range of other CoMP frequency ranges as this cell；
For common frequency range, the ordinary user for being preferentially supplied to this cell is used；The use of CoMP user and collaborative user
Priority is below ordinary user, and wherein CoMP user is prior to collaborative user；
For primary CoMP frequency range, the CoMP user for being preferentially supplied to this cell is used；It is excellent for non-primary CoMP frequency range
The collaborative user for being first supplied to the primary CoMP frequency range in neighboring community uses；Be provided secondarily to this cell CoMP user use and its
His collaborative user uses；Ordinary user is minimum using the priority of CoMP frequency range.
Preferably, the neighboring community selects primary CoMP frequency range of the different CoMP frequency ranges as this cell are as follows: each
Cell selects primary CoMP frequency range of the corresponding CoMP frequency range as this cell according to 3 result of Physical Cell Identifier PCI mould.
Preferably, this method comprises:
A, the resource requirement for counting cell CoMP user number and each CoMP user in a period of time, calculates the cell
CoMP resource requirement；
B, judge whether the CoMP resource requirement of the cell is greater than preset threshold value, it is no if it is being transferred to step C
Then it is transferred to step G；
C, the corresponding primary CoMP frequency allocation of this cell is given to the CoMP user of this cell, priority is set to height and notifies
Cooperation district is occupied the resource frequency range mark by collaborative user, and priority is set to height；
If D, the non-primary CoMP frequency range of this cell has available resources, and is obtained by carrying out information exchange with cooperation cell
Know the corresponding resource of frequency range in cooperation cell be idle or occupied but priority be it is low, then be transferred to step E, otherwise terminate this stream
Journey；
E, give this cell CoMP user, during priority is set as, will cooperate with the non-primary CoMP frequency allocation of this cell
The resource frequency range mark of cell is that collaborative user occupies, and during priority is set as, is transferred to step F；
F, judge whether the CoMP resource of this cell distribution has reached the CoMP resource requirement of the cell, if so, terminating this
Process, otherwise return step D；
G, judge in the corresponding primary CoMP frequency range of this cell with the presence or absence of the free time for the CoMP resource requirement for meeting cell
Resource, and if it exists, the idling-resource is then distributed to the CoMP user of this cell, otherwise seizes low or middle priority users money
Source assigns them to the CoMP user of this cell, and priority is set to height, and notify cooperation district by the resource frequency range mark for association
Same user occupancy, priority are set to height, terminate this process.
Preferably, the threshold value is the 1/3 of the total CoMP resource of cell.
Preferably, PdIndicate the resource requirement of CoMP user, BdFor the efficiency of transmission of CoMP user, when CoMP user is current
Business is then P when guaranteeing bit rate GBR trafficd=GBRd/Bd；When CoMP user current business is not guarantee bit rate
When Non-GBR business, then Pd=MinBRd/Bd；Wherein
GBRdFor the minimum guarantee rate of the GBR traffic, MinBRdFor the minimum guarantee rate of the Non-GBR business.
As can be seen from the above technical solutions, band downlink resource is divided into CoMP frequency range and common frequency range, CoMP frequency range
It is divided into the primary CoMP frequency range and non-primary frequency range of cell again, the ordinary user that common frequency range is preferentially supplied to this cell uses；
Primary CoMP frequency range, the CoMP user for being preferentially supplied to this cell are used, for non-primary CoMP frequency range, are preferentially supplied to adjacent
The collaborative user of the primary CoMP frequency range of cell uses, and other users are arranged to the lower use priority of above-mentioned frequency range, makes
It obtains different user and uses different frequency ranges respectively, to reach resource shared by reasonable distribution CoMP, improve the mesh of throughput of system
, and not by the nonoverlapping limitation of cooperative cluster.
Detailed description of the invention
Fig. 1 is the networking schematic diagram for cooperateing with multiple spot technology；
Fig. 2 is division schematic diagram of the application to the cell resource of frequency range；
Fig. 3 is downlink CoMP resource allocation methods flow chart provided by the embodiments of the present application.
Specific embodiment
Band downlink resource is divided into CoMP frequency range and common frequency range by technical scheme, and CoMP frequency range is divided into 3 again
Section, neighboring community select primary CoMP frequency range of the different CoMP frequency ranges as this cell, and other CoMP frequency ranges are small as this
The non-primary CoMP frequency range in area.Each cell has the say to the primary CoMP resource of frequency range of this cell, and cooperation district needs should
When cell provides collaboration resource, need dynamically to obtain the collaboration resource that can be occupied by dynamic cooperation resource bid.Each cell
The distribution of resource is carried out according to uniform principles.The principle includes but is not limited to: specific user accounts for the priority of special frequency channel
Use principle.
For common frequency range, the non-CoMP user i.e. ordinary user for being preferentially supplied to this cell is used；CoMP user and association
Use priority with user is below ordinary user, and wherein CoMP user is prior to collaborative user；
For CoMP frequency range, preferentially it is supplied to CoMP user and collaborative user uses.Primary CoMP frequency range, is preferentially supplied to
The CoMP user of the cell uses；Other two sections are non-primary CoMP frequency range, are preferentially supplied to the primary CoMP frequency range in neighboring community
Collaborative user use；The CoMP user for being provided secondarily to this cell uses and other collaborative users use；Ordinary user uses
The priority of CoMP frequency range is minimum.
The ordinary user, CoMP user, the meaning of collaborative user are described as follows: in a cell A, being divided into common use
Family and CoMP user, wherein the general user under ordinary user, that is, non-CoMP mode, CoMP user refer to needs other cells B association
The user of work；For cell B, the user for needing cell B to cooperate in cell A is collaboration user.
The meaning for dividing different priorities is, when carrying out resource allocation according to above-mentioned priority, if without enough free time
The resource of frequency range, high-priority users can seize in same frequency range, the resource of low priority user；Middle priority users can be seized with frequency
The resource of section low priority user.
To keep the technical principle, feature and technical effect of technical scheme clearer, below in conjunction with specific reality
Example is applied technical scheme is described in detail.
In the embodiment of the present application, each cell is according to Physical Cell Identifier (PCI, Physical Cell Identifier)
3 result of mould selects primary CoMP frequency range of the corresponding CoMP frequency range as this cell, and other CoMP frequency ranges are as this cell
Non-primary CoMP frequency range.
Downlink CoMP resource allocation methods process provided by the embodiments of the present application as shown in figure 3, the specific steps for including such as
Under:
Step 301: the resource requirement of statistics a period of time (T) interior cell CoMP user number and each CoMP user, meter
CoMP resource (Req_Prb_Num_CoMP) needed for calculating the cell.
Step 302: it is preset whether CoMP resource (Req_Prb_Num_CoMP) needed for judging this cell is greater than
Otherwise threshold value is transferred to step 307 if it is step 303 is transferred to.In the embodiment of the present application, the threshold value is the total CoMP money of cell
The 1/3 of source (Total_Prb_Num_CoMP), total CoMP resource include the primary CoMP resource of frequency range and non-primary CoMP frequency
The resource of section.
Step 303: the corresponding primary CoMP frequency allocation of this cell being given to the CoMP user of this cell, priority is set to height
And cooperation district is notified to be occupied the resource frequency range mark by collaborative user, priority is set to height, is transferred to step 304.If this is small
The corresponding primary CoMP frequency range in area is by, low priority user occupancy, then CoMP user seizes the resource of frequency range.
Step 304: if the non-primary CoMP frequency range of this cell has available resources, and by carrying out information with cooperation cell
Interaction learn the corresponding resource of frequency range in cooperation cell be idle or occupied but priority be it is low, then be transferred to step 305, otherwise
Terminate this process.
Step 305: give the non-primary CoMP frequency allocation of this cell to this cell CoMP user, during priority is set as,
It is that collaborative user occupies by the resource frequency range mark of cooperation district, during priority is set as, is transferred to step 306；
Step 306: judging whether the CoMP resource of this cell distribution has reached the total CoMP resource requirement (Req_ of the cell
Prb_Num_CoMP), if so, terminating this process, otherwise return step 304.
Step 307: judging to whether there is Req_Prb_Num_CoMP RB's in the corresponding primary CoMP frequency range of this cell
Idling-resource, and if it exists, be then distributed directly to the CoMP user of this cell, otherwise seize low or middle priority users money
Source assigns them to the CoMP user of this cell, and priority is set to height, and notify cooperation district by the resource frequency range mark for association
Same user occupancy, priority are set to height, terminate this process.
In the embodiment of the present application, if there are there is idle frequency range in ordinary user and primary CoMP frequency range in cell, it will
It distributes to ordinary user, and priority is set as low.
The specific implementation that another embodiment of the application gives the resource requirement for obtaining each CoMP user is as follows:
PdIndicate the resource requirement (unit PRB) of CoMP user, BdFor the efficiency of transmission (when initial transmission of CoMP user
Using default value), when CoMP user current business is to guarantee bit rate (GBR) business, then Pd=GBRd/Bd；When CoMP is used
Family current business is when not guaranteeing bit rate (Non-GBR) business, then Pd=MinBRd/Bd；Wherein, GBRdFor the minimum guarantee speed of the GBR traffic
Rate, MinBRdFor the minimum guarantee rate of the Non-GBR business.
The foregoing is merely the preferred embodiments of the application, not to limit the protection scope of the application, it is all
Within the spirit and principle of technical scheme, any modification, equivalent substitution, improvement and etc. done should be included in this Shen
Within the scope of please protecting.
Claims (5)
1. a kind of downlink cooperates with multiple spot CoMP resource allocation methods, which is characterized in that the band downlink resource of cell to be divided into
CoMP frequency range and common frequency range, wherein CoMP frequency range is divided into 3 sections, and neighboring community selects different CoMP frequency ranges as this cell
Primary CoMP frequency range, non-primary CoMP frequency range of other CoMP frequency ranges as this cell；
For common frequency range, the ordinary user for being preferentially supplied to this cell is used；The use of CoMP user and collaborative user are preferential
Grade is below ordinary user, and wherein CoMP user is prior to collaborative user；
For primary CoMP frequency range, the CoMP user for being preferentially supplied to this cell is used；For non-primary CoMP frequency range, preferentially mention
The collaborative user for supplying the primary CoMP frequency range in neighboring community uses；The CoMP user for being provided secondarily to this cell uses and other associations
It is used with user；Ordinary user is minimum using the priority of CoMP frequency range；
Wherein, the meaning of ordinary user, CoMP user and collaborative user are as follows: in a cell A, be divided into ordinary user and CoMP is used
Family, wherein the general user under ordinary user, that is, non-CoMP mode, CoMP user refer to the user for needing other cell cooperatives；For
For the cooperation cell B that cell A needs, the user for needing cell B to cooperate in cell A is collaborative user.
2. the method according to claim 1, wherein the neighboring community selects different CoMP frequency ranges as this
The primary CoMP frequency range of cell are as follows: each cell according to 3 result of Physical Cell Identifier PCI mould select corresponding CoMP frequency range as
The primary CoMP frequency range of this cell.
3. method according to claim 1 or 2, which is characterized in that this method comprises:
A, the resource requirement for counting cell CoMP user number and each CoMP user in a period of time, calculates the CoMP of the cell
Resource requirement；
B, judge whether the CoMP resource requirement of the cell is greater than preset threshold value, if it is step C is transferred to, otherwise turn
Enter step G；
C, the corresponding primary CoMP frequency allocation of this cell is given to the CoMP user of this cell, priority is set to height and notifies to cooperate with
Cell is occupied the resource frequency range mark by collaborative user, and priority is set to height；
If D, the non-primary CoMP frequency range of this cell has available resources, and learns association by carrying out information exchange with cooperation cell
Make the corresponding resource of frequency range of cell be idle or occupied but priority be it is low, then be transferred to step E, otherwise terminate this process；
E, the non-primary CoMP frequency allocation of this cell is given to this cell CoMP user, during priority is set as, by cooperation district
The resource frequency range mark be that collaborative user occupies, during priority is set as, be transferred to step F；
F, judge whether the CoMP resource of this cell distribution has reached the CoMP resource requirement of the cell, if so, terminate this process,
Otherwise return step D；
G, judge to whether there is the idling-resource for meeting the CoMP resource requirement of cell in the corresponding primary CoMP frequency range of this cell,
If it exists, then the idling-resource is distributed to the CoMP user of this cell, otherwise seizes low or middle priority users resource, it will
Its CoMP user for distributing to this cell, priority are set to height, and cooperation district is notified to use the resource frequency range mark for collaboration
Family occupies, and priority is set to height, terminates this process.
4. according to the method described in claim 3, it is characterized in that, the threshold value is the 1/3 of the total CoMP resource of cell.
5. according to the method described in claim 3, it is characterized in that, PdIndicate the resource requirement of CoMP user, BdFor CoMP user
Efficiency of transmission, when CoMP user current business is to guarantee bit rate GBR traffic, then Pd=GBRd/Bd；Work as CoMP user
Current business is when not guaranteeing bit rate Non-GBR business, then Pd=MinBRd/Bd；Wherein GBRdFor the minimum guarantee speed of the GBR traffic
Rate, MinBRdFor the minimum guarantee rate of the Non-GBR business.
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| CN107182057B (en) * | 2016-03-10 | 2022-12-02 | 中兴通讯股份有限公司 | Inter-cell cooperation method and device in LTE system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101868017A (en) * | 2010-06-13 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for realizing CoMP downlink communication |
| CN101989868A (en) * | 2009-08-05 | 2011-03-23 | 株式会社Ntt都科摩 | Multi-cell cooperative transmission method, central controller and user equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989868A (en) * | 2009-08-05 | 2011-03-23 | 株式会社Ntt都科摩 | Multi-cell cooperative transmission method, central controller and user equipment |
| CN101868017A (en) * | 2010-06-13 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for realizing CoMP downlink communication |
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