CN104918331B - A kind of frequency resource allocation method and device - Google Patents
A kind of frequency resource allocation method and device Download PDFInfo
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- CN104918331B CN104918331B CN201510309034.3A CN201510309034A CN104918331B CN 104918331 B CN104918331 B CN 104918331B CN 201510309034 A CN201510309034 A CN 201510309034A CN 104918331 B CN104918331 B CN 104918331B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/27—Control channels or signalling for resource management between access points
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Abstract
The invention discloses a kind of frequency resource allocation method and devices, the interference between Small Cell is effectively reduced under the intensive identical networking scene of Small Cell.A kind of frequency resource allocation method provided by the invention, it include: Centralized Controller when determining the slight allocating frequency resource under needing to control for the Centralized Controller, determine the small cell of the interference of the cell of the Centralized Controller self maintained, and the frequency resource currently occupied according to the interference cell, for the slight allocating frequency resource；The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of frequency resource allocation methods and device.
Background technique
With flourishing for mobile broadband technology, various intelligent terminals bring the blowout of data service to increase.Meanwhile
Higher and higher data traffic concentrates on each hot spot scene of indoor and outdoor.Traditional macro base station encounters the bottleneck of networking and covering,
In order to realize depth covering and the capacity boost of network, while considering cost effect, operator turns to more attentions
Cell (Small Cell).Small Cell can complete to provide high data with high quality-of-service and low cost well
The requirement of rate business.
Under the scene of Small Cell identical networking, the dense deployment of Small Cell will lead to adjacent S mall Cell
The distance between reduce, thus generate serious interference problem, reduce the performance of system.In this regard, must be using effective interference
Management strategy.Adaptive frequency reuse (Adaptive Frequency Reuse, AFR) is a kind of technical side proposed recently
Case.In AFR scheme, whole system frequency band is made of multiple sub-bands.For each Small Cell, band system band is divided into
Orthogonal subbands, reuse sub-band and the sub-band three parts being forbidden to use.Each Small Cell has an interference column
Table, storage and the adjacent S mall Cell for oneself having interference relationships.Wherein, interfering the method for building up of list is, Small Cell
After powering on, by the reference signal strength of other Small Cell of network intercepting (Sniffer) functional measurement, if reference signal
Intensity is more than preset judgement thresholding, then the Small Cell is added in interference list.
The realization process of AFR is divided into three steps:
Step 1: the Small Cell to interfere with each other distributes an orthogonal sub-band；
Step 2: it is followed successively by Small Cell and distributes multiple orthogonal sub-bands, while guaranteeing to there is interference relationships
The sub-band of Small Cell distribution is mutually orthogonal；
Step 3: by interference level of the limitation adjacent S mall Cell in same frequency band resource, adjacent S mall is allowed
Cell conditionally reuses identical sub-band, thus increasing band system band utilization rate and reducing interference value two in frequency band
Compromise is obtained between person.
In step 3, for each nonopiate sub-band, if Small Cell needs to assess it as multiplexing son frequency
Band, the influence to the snr of received signal of the Small Cell in the Small Cell and its interference list, if receiving letter
It makes an uproar than in license thresholding, then it is assumed that it can be used as the reuse sub-band of the Small Cell.Frequency resource multiplexing request and
Response (license or refusal) is realized by the interactive process between Small Cell.
In the prior art, AFR scheme uses distributed structure/architecture, and each Small Cell is required and adjacent Small
Cell interaction, in this way, interaction between Small Cell then can very frequently, and transmission is opened when Small Cell quantity is more
Sell larger.
From realization mechanism, the sub-band number that Small Cell can be multiplexed is only related with the quality of wireless signal,
And not necessarily match itself load or resource use demand.Meanwhile Small Cell is needed in request frequency resource multiplex
Request message is sent to adjacent each Small Cell, only after the multiplexing license for receiving each request Small Cell,
It just can be carried out channeling.In this way, not only when extend, but also success rate is low.When adjacent S mall Cell number is more, problem is got over
It is prominent.In addition, under some complications, for example, a Small Cell is received after sending frequency resource multiplexing request message
The frequency resource multiplexing request message of adjacent S mall Cell transmission is arrived, very complicated and effect is poor in realization.
In addition, in the prior art, each Small Cell forms respective interference list.Since measurement fluctuation etc. influences,
The partial information content of the list may be unidirectional, i.e. two Small Cell not interference relationships each other, cannot be truly anti-
Reflect actual interference situation.
In conclusion the prior art, under the intensive identical networking scene of Small Cell, each Small Cell oneself is true
The frequency resource for needing to occupy calmly, and respectively safeguard the interfered cell list of oneself, therefore there are adjacent Small Cell
Between the larger problem of interference.
Summary of the invention
The embodiment of the invention provides a kind of frequency resource allocation method and devices, to intensive with frequency in Small Cell
Under networking scene, the interference between Small Cell is effectively reduced.
A kind of frequency resource allocation method provided in an embodiment of the present invention, comprising:
For Centralized Controller when determining the slight allocating frequency resource under needing to control for the Centralized Controller, determining should
The interference cell of the cell of Centralized Controller self maintained, and provided according to the frequency that the interference cell currently occupies
Source, for the slight allocating frequency resource；
The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell.
In this way, Centralized Controller is needed when determining for the slight allocating frequency money under Centralized Controller control
When source, the interference cell of the cell of the Centralized Controller self maintained is determined, and current according to the small cell of interference
The frequency resource of occupancy, for the slight allocating frequency resource；The Centralized Controller provides the frequency distributed for the slight area
Source notifies to give the cell, so that under the intensive identical networking scene of Small Cell, due to using centralized architecture, Small
Reliable transmission and interaction are not needed between Cell, and especially when Small Cell quantity is more, transport overhead can be effectively reduced；
Also, since Centralized Controller uniformly safeguards Small Cell interference relationships, the reality being truly reflected between Small Cell
Disturbed condition, therefore the interference between Small Cell can be effectively reduced.
Preferably, available frequency resource is divided into center frequency-band and edge band in advance, wherein the edge band
Including multiple edge sub-bands.
Preferably, the Centralized Controller is determined as follows the cell under needing to control for the Centralized Controller
Dividing frequency resource: when the original frequency resource allocation request that the cell received under Centralized Controller control is sent,
It determines and needs to distribute original frequency resource for the slight area；
The Centralized Controller is according to the interference cell of the cell of the Centralized Controller self maintained and described
The frequency resource that cell currently occupies is interfered, for the slight allocating frequency resource, is specifically included: the Centralized Controller root
The frequency currently occupied according to the interference cell and the interference cell of the cell of the Centralized Controller self maintained
Resource distributes one or more edges sub-band for the slight area；
The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell, specifically include: by institute
It states center frequency-band and notifies to give the cell for the information of the edge sub-band of slight area's distribution.
Preferably, this method further include: the Centralized Controller periodically acquires the frequency resource that the cell reports and needs
Seek information.
Preferably, this method further include: the Centralized Controller uses feelings according to the frequency resource that the cell reports
Condition information determines for needing to recycle the edge sub-band for having distributed to the cell and the edge sub-band for needing to recycle
Number, and the frequency resource currently occupied according to the current interference cell of the cell, and the edge sub-band for needing to recycle
Number, recycling distributed to the edge sub-band of the cell.
Preferably, the frequency resource that the Centralized Controller is currently occupied according to the current interference cell of the cell,
And the number for the edge sub-band for needing to recycle, recycling have been distributed to the edge sub-band of the cell, have been specifically included:
The Centralized Controller determines the edge sub-band that the current interference cell of the cell currently occupies, and is directed to
In the edge sub-band each edge sub-band statistics occupy the edge sub-band cell number, according to number from
Small sequence is arrived greatly, and the edge sub-band is ranked up, according to ranking results, and the edge sub-band that needs to recycle
Number successively recycles the edge sub-band for having distributed to the cell.
Preferably, this method further include: the Centralized Controller is believed according to the frequency resource demand that the cell reports
Breath, determination need to distribute new edge sub-band for the slight area and need to be that the slight area distributes new edge sub-band
Number, and the frequency resource currently occupied according to the current interference cell of the cell, and need to distribute for the slight area
The number of new edge sub-band, for cell allocations of edge sub-band again.
Preferably, the frequency resource that the Centralized Controller is currently occupied according to the current interference cell of the cell,
And need to distribute the number of new edge sub-band for the slight area, for cell allocations of edge sub-band again, specifically
Include:
The Centralized Controller determines the edge sub-band that the current interference cell of the cell currently occupies, and is directed to
Each edge sub-band statistics in the edge sub-band occupies the number of the cell of the edge sub-band, according to number from small
To big sequence, to the edge, sub-band is ranked up, and according to ranking results, and needs to distribute new edge for the slight area
The number of sub-band, for cell allocations of edge sub-band again.
Preferably, cell interference matrix relation table of the Centralized Controller according to the Centralized Controller self maintained,
Determine the interference cell of the cell, wherein the cell interference matrix relation table include the small cell that interferes with each other it
Between corresponding relationship；
The Centralized Controller according to the cell frequency resource allocation table of the Centralized Controller self maintained, determine described in
Interfere the frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each small cell is current
The information of the frequency resource of occupancy.
A kind of frequency resource allocation device provided in an embodiment of the present invention, comprising:
First unit, for determining when determining the slight allocating frequency resource under needing to control for Centralized Controller
The interference cell of the cell of the Centralized Controller self maintained, and the frequency currently occupied according to the interference cell
Resource, for the slight allocating frequency resource；
Second unit, for will be that the frequency resource that the slight area distributes notifies to give the cell.
Preferably, available frequency resource is divided into center frequency-band and edge band in advance by the first unit, wherein
The edge band includes multiple edge sub-bands.
Preferably, the first unit is determined as follows the slight differentiation under needing to control for the Centralized Controller
With frequency resource: when the original frequency resource allocation request that the cell received under Centralized Controller control is sent, really
Surely it needs to distribute original frequency resource for the slight area；
The first unit is according to the interference cell of the cell of the Centralized Controller self maintained and described dry
The frequency resource that cell currently occupies is disturbed, distributes one or more edges sub-band for the slight area；
The second unit is specifically used for: the edge sub-band distributed by the center frequency-band and for the slight area
Information notifies to give the cell.
Preferably, the first unit is also used to: periodically acquiring the frequency resource demand information that the cell reports.
Preferably, the first unit is also used to: the frequency resource service condition information reported according to the cell, really
The fixed number for needing to recycle the edge sub-band for having distributed to the cell and the edge sub-band for needing to recycle, and according to this
The frequency resource that the current interference cell of cell currently occupies, and the number of edge sub-band for needing to recycle, are recycled
The edge sub-band of the cell is distributed to.
Preferably, the first unit determines the edge sub-band that the current interference cell of the cell currently occupies,
And the number of the cell of the edge sub-band is occupied for each edge sub-band statistics in the edge sub-band, according to
The sequence of number from big to small is ranked up the edge sub-band, according to ranking results, and edge for needing to recycle
The number of frequency band successively recycles the edge sub-band for having distributed to the cell.
Preferably, the first unit is also used to: the frequency resource demand information reported according to the cell, determining needs
To be that the slight area distributes new edge sub-band and needs to be number that the slight area distributes new edge sub-band, and root
According to the frequency resource that the current interference cell of the cell currently occupies, and need to distribute new edge for the slight area
The number of frequency band, for cell allocations of edge sub-band again.
Preferably, the first unit determines the edge sub-band that the current interference cell of the cell currently occupies,
And the number of the cell of the edge sub-band is occupied for each edge sub-band statistics in the edge sub-band, according to a
The sequence of number from small to large, to the edge, sub-band is ranked up, and according to ranking results, and is needed for slight area's distribution newly
Edge sub-band number, for cell allocations of edge sub-band again.
Preferably, cell interference matrix relation table of the first unit according to the Centralized Controller self maintained, really
The interference cell of the fixed cell, wherein the cell interference matrix relation table includes between the small cell interfered with each other
Corresponding relationship；
The first unit determines described dry according to the cell frequency resource allocation table of the Centralized Controller self maintained
Disturb the frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each cell currently accounts for
The information of frequency resource.
Detailed description of the invention
Fig. 1 is centralized control configuration diagram provided in an embodiment of the present invention；
Fig. 2 is Small Cell interference matrix relation schematic diagram provided in an embodiment of the present invention；
Fig. 3 is that frequency resource provided in an embodiment of the present invention divides schematic diagram；
Fig. 4 is a kind of idiographic flow schematic diagram of frequency resource management method provided in an embodiment of the present invention；
Fig. 5 is a kind of flow diagram of frequency resource recovery method provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of frequency resource reassignment method provided in an embodiment of the present invention；
Fig. 7 is a kind of overall schematic of frequency resource management method provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of frequency resource managing device provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of frequency resource allocation method and devices, are suitable for Small Cell intensively with frequency
The interference between Small Cell can be effectively reduced in networking scene.
The embodiment of the present invention is based on centralized architecture, as shown in Figure 1.In Fig. 1, M Small Cell and Centralized Controller
It is connected.Here, Centralized Controller is logical functional entity, can be independent physical equipment, can also be set with other physics
Standby close sets, such as can close and set with any server of network side.
In technical solution provided in an embodiment of the present invention, Centralized Controller is that coupled each Small Cell is distributed
Frequency resource.Specifically, in the Small Cell electrifying startup stage, Centralized Controller is that Small Cell distributes initial frequency
Resource；In Small Cell working stage, Centralized Controller combination Small Cell Current resource use demand and load condition
And the disturbed condition of adjacent S mall Cell, update the frequency resource that Small Cell can be used.In the whole process,
Which frequency resource Small Cell can be used and is completely controlled by Centralized Controller, and at the same time, Centralized Controller needs reality
When safeguard two tables: Small Cell interference matrix relation table and Small Cell frequency resource allocation table.
Wherein, Small Cell interference matrix relation table by the network intercepting of Small Cell and reports, and concentrates control
Device processed determines the processes such as the processing for reporting content.Specifically, peripheral base station is periodically actively listened to after Small Cell is powered on
Cell signal, measure adjacent S mall Cell Reference Signal Received Power (Reference Signal Received
Power, RSRP) and it is reported to Centralized Controller.Centralized Controller reports information to handle to Small Cell's, generates
Small Cell interference matrix relation table.
As an example, a kind of simple processing method can be, if Small Cell is to adjacent S mall Cell's
RSRP measured value is greater than pre-determined threshold, then it is assumed that the two has interference, otherwise it is assumed that not interfering with.The present invention is to specific judgement
Criterion is with no restriction.Note Small Cell interference matrix is [Iij], building method are as follows: if Small Celli and Small
Cellj has interference relationships, alternatively, Small Cellj and Small Celli have interference relationships, then Iij=IjiSet 1, otherwise, Iij
=Iji0 is set, as shown in Figure 2.
Example matrix as shown in Figure 2 is as it can be seen that Small Cell1 and Small Cell2 and Small Cell3 have interference to close
System；Small Cell2 only has interference relationships with Small Cell1；Small Cell3 and Small Cell1 and Small Cell
M has interference relationships etc..
The each Small Cell being had recorded under Centralized Controller administration in Small Cell frequency resource allocation table has divided
The frequency resource matched.Assuming that M Small Cell identical networking.In embodiments of the present invention, band system band resource is divided into center
Frequency band Bc and edge band Be two parts, edge band Be are divided into N number of sub-band again, this N number of sub-band resource is mutually just
It hands over.The division number N of edge sub-band is bigger, and granularity is smaller, controls finer, as shown in Figure 3.The size of center frequency-band Bc
It can be by running and safeguarding (Operations&Maintenance, O&M) entity configuration.Central user equipment preferentially uses center
When center frequency-band resource is inadequate, edge sub-band resource is can be used in band resource；Edge customer equipment can only use edge
Band resource.
In embodiments of the present invention, all Small Cell Sharing Center band resource, different Small Cell occupy
Identical or different edge sub-band, the Small Cell interfered with each other use different edge sub-bands as far as possible, current to provide
Source use demand and the lesser Small Cell of load use fewer number of edge sub-band as far as possible.Centralized Controller combines
The load condition of Small Cell and the disturbed condition of adjacent S mall Cell dynamically adjust each Small under its administration
The number and location of the available edge sub-band of Cell complete the side Small Cell to reduce the interference between Small Cell
The assigning process of edge sub-band.
Specific frequency resource allocation implementation process is as shown in Figure 4, comprising:
Step 1:Small Cell completes electrifying startup and is listening to after reporting, to the initial frequency of Centralized Controller request distribution
Rate resource；
Step 2: Centralized Controller is request distribution original frequency according to the Small Cell interference matrix relation table of update
The Small Cell of resource distributes one or more edges sub-band；
Step 3: Centralized Controller is to the Small Cell resource response allocation result, including center frequency-band and one
A or multiple edges sub-band；Later, which enters work according to the resource allocation result that Centralized Controller is sent
Stage.
It should be noted that no longer needing to send out when subsequent Centralized Controller is the frequency resource of Small Cell adjustment distribution
Send the information of center frequency-band, it is only necessary to the information of the edge Small Cell sub-band is notified, because of all Small Cell
Shared center frequency-band resource is pre-set, if subsequent have adjusted, then carries out notifying updated center frequency-band
Resource information.
Step 4: Centralized Controller updates Small Cell frequency resource allocation table；
Step 5: in working stage, Small Cell periodically carries out resource service condition statistics and reports centralized control
Device；
Step 6: Centralized Controller decides whether that needing to distribute new edge sub-band or recycling for Small Cell has divided
The edge sub-band matched；If necessary to distribute or recycle edge sub-band, Centralized Controller according to Small Cell statistically
Respond with and in conjunction with self maintained interference matrix relationship and frequency resource allocation table, determine need distribute or recycle edge sub-band
Number and its position；
Step 7: if necessary to distribute or recycle edge sub-band, Centralized Controller sends frequency resource to Small Cell
Update instruction message, indicates its new available edge sub-band information, and Small Cell is according to the resource allocation of Centralized Controller
As a result UE resource allocation is carried out；
Step 8: if necessary to distribute or recycle edge sub-band, Centralized Controller updates Small Cell frequency resource point
With table.
Above-mentioned steps 7 and step 8 are optional steps.
Wherein, the specific implementation in step 7, for example,
Step 1: Centralized Controller starts timer, to the Small Cell received during primary operation in timer
Reporting message be uniformly processed；The timing length of timer is configured by O&M, the setting of the duration depend on Small Cell with
Transmission delay between Centralized Controller；
Step 2: the Small Cell Current resource use demand and load feelings are carried in the message that Small Cell is reported
Condition, including UE number, edge UE number, edge Physical Resource Block (Physical Resource Block, the PRB) resource received
Demand etc., here, particular content is with no restriction.The Current resource use demand that Centralized Controller is reported according to Small Cell
With load condition and be the allocated edge sub-band situation of the Small Cell, it is determined whether need for each Small Cell
Distribution or recycling edge sub-band and corresponding edge sub-band number.
Following table provides a simple example.Assuming that Small Cell Current resource use demand situation is T, two are preset
Resource use demand thresholding is respectively the first thresholding TH1 and the second thresholding TH2, TH1 < TH2.In the case of different resource use demand
The edge sub-band number needed is different.
It as seen from the above table, may finally be according to the difference that the 4th column obtain in table, it is determined whether need for Small Cell
Reallocation edge sub-band, and if desired reallocation edge sub-band when required reallocation edge sub-band number, or
Person determines the need for being recovered as the allocated edge sub-band of Small Cell, and if desired recycles allocated edge
When sub-band, the allocated edge sub-band number of required recycling.For example, if the Current resource of a Small Cell uses
Demand T < TH1 is determined and is needed for the A1-B edge sub-band of Small Cell reallocation, if A1-B if then A1-B is greater than zero
Equal to zero, it is determined that do not need to reallocate for the Small Cell or recycle edge sub-band, if A1-B is less than zero, it is determined that
Need to recycle the absolute value edge sub-band for being the A1-B that the Small Cell is distributed.TH1≤T<TH2 and T>=
The case where TH2, similarly, repeats no more.
Under actual conditions, the judgement of resource service condition can also have other modes, and the embodiment of the present invention is without limiting.
Assuming that Centralized Controller has received reporting for M Small Cell altogether, wherein mode shown in table determines M1 in use
A Small Cell needs to recycle edge sub-band, and M2 Small Cell needs to reallocate edge sub-band, M3 Small
Cell does not both need to recycle or do not need allocations of edge sub-band；Here, M=M1+M2+M3.
Step 3: assuming that when determining need to M1 Small Cell progress edge sub-band resource reclaim, referring to figure
5, the processing of edge sub-band resource reclaim is carried out to the M1 Small Cell using following steps:
S501, m=1 is enabled；
S502, the Small Cell for needing to discharge edge sub-band for m-th are interfered according to the Small Cell of maintenance
Matrix relationship table, the adjacent S mall Cell that obtaining has interference relationships with the Small Cell gather, it is assumed that shared L1 interference
Small Cell；There is shared edge sub-band with m-th of Small Cell and provide in this L1 interference Small Cell
Source.
S503, the Small Cell frequency resource allocation table according to maintenance, are determined as each in this L1 Small Cell
The allocated edge sub-band of Small Cell, and for each of these allocated edge sub-bands edge sub-band
It is counted, counts each edge sub-band and occupied by how many a Small Cell, according to the sequence that statistical result is descending,
These allocated edge sub-bands are ranked up, the ranking results of these allocated edge sub-bands are obtained；
For example, the first Small Cell has 10 interference Small Cell, according to Small Cell frequency resource allocation table
Determine this 10 occupied edge sub-bands of interference Small Cell, such as there are three edge sub-band, wherein first edge
6 Small Cell that sub-band is interfered in Small Cell by this 10 are occupied, and second edge sub-band is interfered by this 10
8 Small Cell in Small Cell are occupied, and third edge sub-band is by this 10 3 interfered in Small Cell
Small Cell is occupied, then ranking results are second edge sub-band, first edge sub-band, third edge sub-band.If the
One Small Cell needs to discharge an edge sub-band resource, then discharges second edge sub-band resource, if the first Small
Cell needs to discharge two edge sub-band resources, then discharges the resource of second edge sub-band and first edge sub-band.
S504, the edge sub-band number for needing to discharge is determined according to table shown in step 2, successively described in selection
Sequence is discharged near preceding edge sub-band in ranking results；
S505, Small Cell frequency resource allocation table is updated；
S506, Centralized Controller send frequency resource update instruction message to the Small Cell, indicate its available side
Edge sub-band information, wherein not including the information for the edge sub-band being released；
S507, m=m+1；
S508, judge whether m is less than or equal to M1, if it is, going to step S502, otherwise, terminate.
Step 4: assuming that when determine have M2 Small Cell need to reallocate edge sub-band when, referring to Fig. 6, to this
M2 Small Cell carries out the reallocation processing of edge sub-band resource using following steps:
S601, m '=1 is enabled；
S602, the Small Cell for being directed to a edge sub-band that needs to reallocate of m ', according to the Small Cell of maintenance
Interference matrix relation table, the adjacent S mall Cell that obtaining has interference relationships with the Small Cell gather, it is assumed that shared L2
Small Cell；
S603, the Small Cell frequency resource allocation table according to maintenance determine edge of this L2 Small Cell
Bandwidth assignment situation determines the edge sub-band that this L2 Small Cell is occupied, occupy for this L2 Small Cell
Each of edge sub-band edge sub-band counted, count each edge sub-band by how many a Small
Cell is occupied, and according to the sequence that statistical result is ascending, is arranged this L2 Small Cell edge sub-band occupied
Sequence obtains ranking results；
S604, it is directed to the Small Cell, according to the ranking results of step S603, and needed for the Small Cell again
The edge sub-band number of distribution, selected and sorted result is near preceding from the edge sub-band that this L2 Small Cell is occupied
One or more edge sub-bands are allocated；Wherein, need for the Small Cell reallocate edge sub-band number by
Step 2 determines；
For example, the 2nd Small Cell has 10 interference Small Cell, according to Small Cell frequency resource allocation table
Determine this 10 occupied edge sub-bands of interference Small Cell, such as there are three edge sub-band, wherein first edge
6 Small Cell that sub-band is interfered in Small Cell by this 10 are occupied, and second edge sub-band is interfered by this 10
8 Small Cell in Small Cell are occupied, and third edge sub-band is by this 10 3 interfered in Small Cell
Small Cell is occupied, then ranking results are third edge sub-band, first edge sub-band, second edge sub-band.If the
Two Small Cell need to reallocate an edge sub-band resource, then third edge sub-band resource are distributed, if the 2nd Small
Cell needs to reallocate two edge sub-band resources, then distributes the resource of third edge sub-band and first edge sub-band.
S605, Small Cell frequency resource allocation table is updated；
S606, Centralized Controller send frequency resource update instruction message to the Small Cell, indicate its available side
Edge sub-band information, including the edge sub-band information reallocated for the Small Cell；
S607, m '=m '+1 is enabled；
S608, judge whether m ' is less than or equal to M2, if it is, going to S602, otherwise, terminate.
It can be seen that referring to Fig. 7, a kind of frequency resource allocation method provided in an embodiment of the present invention, comprising:
S101, Centralized Controller when determine need for the Centralized Controller control under slight allocating frequency resource when,
Determine the interference cell of the cell of the Centralized Controller self maintained, and currently occupied according to the interference cell
Frequency resource, for the slight allocating frequency resource；
S102, the Centralized Controller notify the frequency resource distributed for the slight area to give the cell.
Preferably, available frequency resource is divided into center frequency-band and edge band in advance, wherein the edge band
Including multiple edge sub-bands.
Preferably, the Centralized Controller is determined as follows the cell under needing to control for the Centralized Controller
Dividing frequency resource: when the original frequency resource allocation request that the cell received under Centralized Controller control is sent,
It determines and needs to distribute original frequency resource for the slight area；
The Centralized Controller is according to the interference cell of the cell of the Centralized Controller self maintained and described
The frequency resource that cell currently occupies is interfered, for the slight allocating frequency resource, is specifically included: the Centralized Controller root
The frequency currently occupied according to the interference cell and the interference cell of the cell of the Centralized Controller self maintained
Resource distributes one or more edges sub-band for the slight area；
The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell, specifically include: by institute
It states center frequency-band and notifies to give the cell for the information of the edge sub-band of slight area's distribution.
Preferably, this method further include: the Centralized Controller periodically acquires the frequency resource that the cell reports
Demand information.
Preferably, this method further include: the Centralized Controller uses feelings according to the frequency resource that the cell reports
Condition information determines for needing to recycle the edge sub-band for having distributed to the cell and the edge sub-band for needing to recycle
Number, and the frequency resource currently occupied according to the current interference cell of the cell, and the edge sub-band for needing to recycle
Number, recycling distributed to the edge sub-band of the cell.
Preferably, the frequency resource that the Centralized Controller is currently occupied according to the current interference cell of the cell,
And the number for the edge sub-band for needing to recycle, recycling have been distributed to the edge sub-band of the cell, have been specifically included:
The edge sub-band that the Centralized Controller determines that the current interference cell of the cell currently occupies (at least wraps
An edge sub-band is included, multiple edge sub-bands may be occupied in most cases), and for the edge currently occupied son frequency
Each edge sub-band statistics in band occupies the number of the cell of the edge sub-band, according to number from big to small suitable
Sequence is ranked up the edge sub-band that this is currently occupied, according to ranking results, and of edge sub-band for needing to recycle
Number, successively recycles the edge sub-band for having distributed to the cell.
Preferably, this method further include: the Centralized Controller is believed according to the frequency resource demand that the cell reports
Breath, determination need to distribute new edge sub-band for the slight area and need to be that the slight area distributes new edge sub-band
Number, and the frequency resource currently occupied according to the current interference cell of the cell, and need to distribute for the slight area
The number of new edge sub-band, for cell allocations of edge sub-band again.
Preferably, the frequency resource that the Centralized Controller is currently occupied according to the current interference cell of the cell,
And need to distribute the number of new edge sub-band for the slight area, for cell allocations of edge sub-band again, specifically
Include:
The edge sub-band that the Centralized Controller determines that the current interference cell of the cell currently occupies (at least wraps
An edge sub-band is included, multiple edge sub-bands may be occupied in most cases), and for the edge currently occupied son frequency
Each edge sub-band statistics in band occupies the number of the cell of the edge sub-band, according to number from small to large suitable
Sequence is ranked up the edge sub-band that this is currently occupied, and according to ranking results, and needs to distribute new side for the slight area
The number of edge sub-band, for cell allocations of edge sub-band again.
Preferably, cell interference matrix relation table of the Centralized Controller according to the Centralized Controller self maintained,
Determine the interference cell of the cell, wherein the cell interference matrix relation table include the small cell that interferes with each other it
Between corresponding relationship；
The Centralized Controller according to the cell frequency resource allocation table of the Centralized Controller self maintained, determine described in
Interfere the frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each small cell is current
The information of the frequency resource of occupancy.
With this method correspondingly, referring to Fig. 8, a kind of frequency resource allocation device provided in an embodiment of the present invention, comprising:
First unit 11, for when determine need for Centralized Controller control under slight allocating frequency resource when, really
The interference cell of the cell of the fixed Centralized Controller self maintained, and the frequency currently occupied according to the interference cell
Rate resource, for the slight allocating frequency resource；
Second unit 12, for will be that the frequency resource that the slight area distributes notifies to give the cell.
Preferably, available frequency resource is divided into center frequency-band and edge band in advance by the first unit, wherein
The edge band includes multiple edge sub-bands.
Preferably, the first unit is determined as follows the slight differentiation under needing to control for the Centralized Controller
With frequency resource: when the original frequency resource allocation request that the cell received under Centralized Controller control is sent, really
Surely it needs to distribute original frequency resource for the slight area；
The first unit is according to the interference cell of the cell of the Centralized Controller self maintained and described dry
The frequency resource that cell currently occupies is disturbed, distributes one or more edges sub-band for the slight area；
The second unit is specifically used for: the edge sub-band distributed by the center frequency-band and for the slight area
Information notifies to give the cell.
Preferably, the first unit is also used to: periodically acquiring the frequency resource demand information that the cell reports.
Preferably, the first unit is also used to: the frequency resource service condition information reported according to the cell, really
The fixed number for needing to recycle the edge sub-band for having distributed to the cell and the edge sub-band for needing to recycle, and according to this
The frequency resource that the current interference cell of cell currently occupies, and the number of edge sub-band for needing to recycle, are recycled
The edge sub-band of the cell is distributed to.
Preferably, the first unit determines the edge sub-band that the current interference cell of the cell currently occupies,
And the number of the cell of the edge sub-band is occupied for each edge sub-band statistics in the edge sub-band, according to
The sequence of number from big to small is ranked up the edge sub-band, according to ranking results, and edge for needing to recycle
The number of frequency band successively recycles the edge sub-band for having distributed to the cell.
Preferably, the first unit is also used to: the frequency resource demand information reported according to the cell, determining needs
To be that the slight area distributes new edge sub-band and needs to be number that the slight area distributes new edge sub-band, and root
According to the frequency resource that the current interference cell of the cell currently occupies, and need to distribute new edge for the slight area
The number of frequency band, for cell allocations of edge sub-band again.
Preferably, the first unit determines the edge sub-band that the current interference cell of the cell currently occupies,
And the number of the cell of the edge sub-band is occupied for each edge sub-band statistics in the edge sub-band, according to a
The sequence of number from small to large, to the edge, sub-band is ranked up, and according to ranking results, and is needed for slight area's distribution newly
Edge sub-band number, for cell allocations of edge sub-band again.
Preferably, cell interference matrix relation table of the first unit according to the Centralized Controller self maintained, really
The interference cell of the fixed cell, wherein the cell interference matrix relation table includes between the small cell interfered with each other
Corresponding relationship；
The first unit determines described dry according to the cell frequency resource allocation table of the Centralized Controller self maintained
Disturb the frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each cell currently accounts for
The information of frequency resource.
In conclusion being Small Cell dividing frequency resource the embodiment of the invention provides centralized architecture is based on
Implementation.Centralized Controller be Small Cell dividing frequency resource when, with reference to Small Cell resource use demand with
Load condition can distribute new frequency resource for it；It can also be recovered as the frequency resource of its distribution；Distributing and recycling frequency
Small Cell interference matrix relation table is referred to when rate resource, is interfered between Small Cell with reducing.Also, due to using collection
Chinese style framework does not need reliable transmission and interaction between Small Cell, especially when Small Cell quantity is more, Ke Yiyou
Effect reduces transport overhead；Dynamic implement frequency resource multiplexing of the present invention, the allocation result each time of Centralized Controller is all as possible
It realizes Small Cell real resource demand and reduces system interference balance between the two；Resource allocation algorithm of the present invention is realized
It is simple and efficient, without concurrent processing；The present invention uniformly safeguards Small Cell interference matrix relation table, is truly reflected Small
Actual interference situation between Cell.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (14)
1. a kind of frequency resource allocation method, which is characterized in that this method comprises:
Centralized Controller determines the concentration when determining the slight allocating frequency resource under needing to control for the Centralized Controller
The interference cell of the cell of controller self maintained, and the frequency resource currently occupied according to the interference cell,
For the slight allocating frequency resource；
The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell；
Available frequency resource is divided into center frequency-band and edge band in advance, wherein the edge band includes multiple edges
Sub-band；
The Centralized Controller is determined as follows the slight allocating frequency money under needing to control for the Centralized Controller
Source: when the original frequency resource allocation request that the cell received under Centralized Controller control is sent, determine that needs are
The slight area distributes original frequency resource；
The Centralized Controller is according to the interference cell and the interference of the cell of the Centralized Controller self maintained
The frequency resource that cell currently occupies specifically includes for the slight allocating frequency resource: the Centralized Controller is according to this
The frequency money that the interference cell of the cell of Centralized Controller self maintained and the interference cell currently occupy
One or more edges sub-band is distributed for the slight area in source；
The Centralized Controller notifies the frequency resource distributed for the slight area to give the cell, specifically include: in described
The information of heart frequency band and the edge sub-band distributed for the slight area notifies to give the cell.
2. the method according to claim 1, wherein this method further include: the Centralized Controller periodically obtains
The frequency resource demand information for taking the cell to report.
3. according to the method described in claim 2, it is characterized in that, this method further include: the Centralized Controller is according to
The frequency resource service condition information that cell reports, determine need recycle distributed to the cell edge sub-band and
The number for the edge sub-band for needing to recycle, and the frequency resource currently occupied according to the current interference cell of the cell,
And the edge sub-band of the cell has been distributed in the number for the edge sub-band for needing to recycle, recycling.
4. according to the method described in claim 3, it is characterized in that, the Centralized Controller interference current according to the cell
The small cell has been distributed in the frequency resource that cell currently occupies, and the number of edge sub-band for needing to recycle, recycling
Edge sub-band, specifically include:
The Centralized Controller determines the edge sub-band that the current interference cell of the cell currently occupies, and for described
In edge sub-band each edge sub-band statistics occupy the edge sub-band cell number, according to number from greatly to
Small sequence is ranked up the edge sub-band, according to ranking results, and of edge sub-band for needing to recycle
Number, successively recycles the edge sub-band for having distributed to the cell.
5. according to the method described in claim 2, it is characterized in that, this method further include: the Centralized Controller is according to
The frequency resource demand information that cell reports determines and needs to distribute new edge sub-band for the slight area and need to be this
Slight area distributes the number of new edge sub-band, and is provided according to the frequency that the current interference cell of the cell currently occupies
Source, and need to distribute the number of new edge sub-band for the slight area, for cell allocations of edge sub-band again.
6. according to the method described in claim 5, it is characterized in that, the Centralized Controller interference current according to the cell
The frequency resource that cell currently occupies, and need to distribute the number of new edge sub-band for the slight area, it is slight for this
Area's allocations of edge sub-band again, specifically includes:
The Centralized Controller determines the edge sub-band that the current interference cell of the cell currently occupies, and is directed to the side
Each edge sub-band statistics in edge sub-band occupies the number of the cell of the edge sub-band, from small to large according to number
Sequence, to the edge, sub-band is ranked up, and according to ranking results, and needs to distribute new edge frequency for the slight area
The number of band, for cell allocations of edge sub-band again.
7. method described in -6 any claims according to claim 1, which is characterized in that the Centralized Controller is according to the concentration control
The cell interference matrix relation table of device self maintained processed, determines the interference cell of the cell, wherein the small cell is dry
Disturbing matrix relationship table includes the corresponding relationship between the cell interfered with each other；
The Centralized Controller determines the interference according to the cell frequency resource allocation table of the Centralized Controller self maintained
The frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each cell currently occupies
Frequency resource information.
8. a kind of frequency resource allocation device, which is characterized in that the device includes:
First unit, for determining the collection when determining the slight allocating frequency resource under needing to control for Centralized Controller
The interference cell of the cell of middle controller self maintained, and provided according to the frequency that the interference cell currently occupies
Source, for the slight allocating frequency resource；
Second unit, for will be that the frequency resource that the slight area distributes notifies to give the cell；
Available frequency resource is divided into center frequency-band and edge band in advance by the first unit, wherein the edge band
Including multiple edge sub-bands；
The first unit is determined as follows the slight allocating frequency resource under needing to control for the Centralized Controller:
When receiving the original frequency resource allocation request that the lower cell of Centralized Controller control is sent, determination needs for this is small
Cell distributes original frequency resource；
The first unit is small according to the interference cell of the cell of the Centralized Controller self maintained and the interference
The frequency resource that cell currently occupies distributes one or more edges sub-band for the slight area；
The second unit is specifically used for: by the information of the center frequency-band and the edge sub-band distributed for the slight area
It notifies to give the cell.
9. device according to claim 8, which is characterized in that the first unit is also used to: it is slight to periodically acquire this
The frequency resource demand information that area reports.
10. device according to claim 9, which is characterized in that the first unit is also used to: according in the cell
The frequency resource service condition information of report determines and needs to recycle the edge sub-band for having distributed to the cell and need to recycle
Edge sub-band number, and the frequency resource currently occupied according to the current interference cell of the cell, and needs
The edge sub-band of the cell has been distributed in the number of the edge sub-band of recycling, recycling.
11. device according to claim 10, which is characterized in that the first unit determines the current interference of the cell
The edge sub-band that cell currently occupies, and the side is occupied for each edge sub-band statistics in the edge sub-band
The number of the cell of edge sub-band is ranked up the edge sub-band, according to the sequence of number from big to small according to row
Sequence as a result, and the number of edge sub-band that needs to recycle, successively recycle the edge sub-band for having distributed to the cell.
12. device according to claim 9, which is characterized in that the first unit is also used to: according in the cell
The frequency resource demand information of report, determination need to distribute new edge sub-band for the slight area and need to be the slight differentiation
Number with new edge sub-band, and the frequency resource currently occupied according to the current interference cell of the cell, and
Need to distribute the number of new edge sub-band for the slight area, for cell allocations of edge sub-band again.
13. device according to claim 12, which is characterized in that the first unit determines the current interference of the cell
The edge sub-band that cell currently occupies, and the edge is occupied for each edge sub-band statistics in the edge sub-band
The number of the cell of sub-band, according to the sequence of number from small to large, to the edge, sub-band is ranked up, and is tied according to sequence
Fruit, and need to distribute the number of new edge sub-band for the slight area, for cell allocations of edge sub-band again.
14. according to device described in any claim of claim 8-13, which is characterized in that the first unit is according to the concentration control
The cell interference matrix relation table of device self maintained processed, determines the interference cell of the cell, wherein the small cell is dry
Disturbing matrix relationship table includes the corresponding relationship between the cell interfered with each other；
The first unit determines that the interference is small according to the cell frequency resource allocation table of the Centralized Controller self maintained
The frequency resource that cell currently occupies, wherein the cell frequency resource allocation table includes that each cell currently occupies
The information of frequency resource.
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| CN201510309034.3A CN104918331B (en) | 2015-06-08 | 2015-06-08 | A kind of frequency resource allocation method and device |
| PCT/CN2016/081456 WO2016197773A1 (en) | 2015-06-08 | 2016-05-09 | Frequency resource allocation method and apparatus |
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| CN105357759B (en) * | 2015-09-25 | 2019-01-18 | 厦门大学 | A kind of method, apparatus and system of small base station centralized configuration resource |
| CN107396444B (en) * | 2016-05-17 | 2020-06-12 | 大唐移动通信设备有限公司 | Method and device for dynamically adjusting carrier of small cell |
| US10136330B2 (en) * | 2016-08-09 | 2018-11-20 | Qualcomm Incorporated | Staggered channel changing for cells of spectrum sharing networks |
| CN106028346B (en) * | 2016-08-12 | 2019-05-07 | 桂林电子科技大学 | A kind of spectrum auction method of cell |
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| CN101998412A (en) * | 2009-08-11 | 2011-03-30 | ***通信集团公司 | Frequency resource allocation method, home node B management system (HMS) and Femto eNB |
| CN104012140A (en) * | 2011-12-21 | 2014-08-27 | 高通股份有限公司 | Methods and apparatus for assignment dependent downlink channel processing for wireless networks |
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| CN102612041A (en) * | 2011-01-20 | 2012-07-25 | 华为技术有限公司 | Spectrum sharing method and network equipment of orthogonal frequency division multiplexing (OFDM) small base station and heterogeneous system network |
| EP2671402B1 (en) * | 2011-02-04 | 2017-01-18 | Nec Corporation | Radio communication system, base station apparatus, radio resource control method, and non-transitory computer readable medium |
| CN104105099B (en) * | 2013-04-07 | 2018-12-14 | 电信科学技术研究院 | A kind of frequency spectrum dynamic allocation method and equipment |
| CN104918331B (en) * | 2015-06-08 | 2019-02-26 | 大唐移动通信设备有限公司 | A kind of frequency resource allocation method and device |
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| CN101998412A (en) * | 2009-08-11 | 2011-03-30 | ***通信集团公司 | Frequency resource allocation method, home node B management system (HMS) and Femto eNB |
| CN104012140A (en) * | 2011-12-21 | 2014-08-27 | 高通股份有限公司 | Methods and apparatus for assignment dependent downlink channel processing for wireless networks |
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