CN104244429B - Dispatching method and controlling equipment for cell - Google Patents
Dispatching method and controlling equipment for cell Download PDFInfo
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- CN104244429B CN104244429B CN201310227420.9A CN201310227420A CN104244429B CN 104244429 B CN104244429 B CN 104244429B CN 201310227420 A CN201310227420 A CN 201310227420A CN 104244429 B CN104244429 B CN 104244429B
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Abstract
Provide a kind of dispatching method and controlling equipment for cell.The dispatching method comprises determining that switch state of the cell in multiple frequency resources；The switch state in each the multiple frequency resource of leisure is exchanged with the neighboring community of the cell；And it is scheduled based on the switch state of a variety of channel state informations and the neighboring community of the user feedback of the cell in the multiple frequency resource.It by the above method and equipment, can be scheduled with very short time interval, and execute the channel state information considered when scheduling from user feedback, enable scheduling result to be better adapted to the change of wireless environment, to improve system performance.
Description
Technical field
The present invention relates to wireless communication fields, and are specifically related to a kind of dispatching method and controlling equipment for cell.
Background technique
It is more including the neighboring community of serving cell and the serving cell in cooperative multi-point (Comp) transmission technology
A cell (or base station) cooperatively to mobile station send signal/from mobile station receive signal, to reduce between cell
Interference, improve base station/mobile station received signal quality, to improve the handling capacity of communication system.For this reason, it may be necessary to described
Cooperative scheduling is carried out between multiple cells.It has been proposed concentrating cooperative scheduling method, in this approach, by central scheduler
Intensively processing for each cell scheduling information (such as channel state information) and based on these information it is intensively right
Each cell is scheduled.However, due to needing while carrying out processing related with multiple cells and scheduling, this centralized dispatching
Mode it is more complicated, and higher requirement is proposed to the processing capacity of central scheduler.
To solve the above-mentioned problems, distributed collaborative scheduling is proposed, wherein instead of carrying out concentration tune to multiple cells
A scheduler is arranged to each cell with the scheduling for the cell in degree.Distributed collaborative scheduling complexity is lower, to scheduling
The requirement of the processing capacity of device also reduces.Two kinds of distributed collaborative dispatching methods are developed, i.e. enhancing inter-cell interference association
(eICIC) and proportional frequency is adjusted to reuse (FFR).EICIC method can be used for carrying out the cooperative scheduling of time domain in heterogeneous network,
FFR method can be used for carrying out the cooperative scheduling of frequency domain in homogeneous network.However, both methods belongs to semi-static cooperation
Dispatching method.For example, (such as several hundred milliseconds) is scheduled at larger time intervals, this makes scheduling result not in FFR
Vertiginous wireless environment is adapted to, thus limited to system bring performance gain.
The method of distributed scheduling can be dynamically carried out in the case where multi-cell cooperating therefore, it is necessary to one kind and is set
It is standby.
Summary of the invention
The present invention is proposed in view of problem above.It is an object of the present invention to provide a kind of scheduling for cell
Method and controlling equipment in a distributed fashion can dynamically adjust each cell in the case where multi-cell cooperating
Degree, so that scheduling result can adapt to the change in wireless environment, to effectively improve the performance of system.
According to an aspect of the invention, there is provided a kind of dispatching method for cell, comprising: determine that the cell exists
Switch state in multiple frequency resources；Opening in each the multiple frequency resource of leisure is exchanged with the neighboring community of the cell
Off status；And the user feedback based on the cell a variety of channel state informations and the neighboring community in the multiple frequency
Switch state in rate resource is scheduled.
According to another aspect of the present invention, a kind of controlling equipment for cell is provided, comprising: pre-scheduling device, quilt
It is configured to determine switch state of the cell in multiple frequency resources；Communication device is configured as the phase with the cell
Adjacent cell exchanges the switch state in each the multiple frequency resource of leisure；And dispatching device, it is configured as based on described small
Switch state of a variety of channel state informations and the neighboring community of the user feedback in area in the multiple frequency resource comes
It is scheduled.
It, can be independent to each cell in a frequency domain by the dispatching method and controlling equipment of above-mentioned aspect according to the present invention
Ground is scheduled, rather than carries out centralized dispatching to multiple cells, thus scheduler has not needed very high processing capacity.This
It outside, can be with very short time interval (such as 1 millisecond) in the dispatching method and controlling equipment of above-mentioned aspect according to the present invention
It is scheduled, and is executing the channel state information considered when scheduling from user feedback, due to the channel state information
The dynamic for being able to reflect wireless environment changes, and accordingly, with respect to traditional Semi-static scheduling method, scheduling result can be preferably
It is adapted to the change of wireless environment, to improve the performance of communication system.
Detailed description of the invention
Embodiments of the present invention is described in detail in conjunction with the accompanying drawings, above and other objects of the present invention, feature,
Advantage will become apparent, in which:
Figure 1A and Figure 1B schematically illustrates the application scenarios of the embodiment of the present invention.
Fig. 2 is the flow chart for showing the dispatching method for cell according to a first embodiment of the present invention.
Fig. 3 is the flow chart operated in detail for showing step S201 shown in Fig. 2.
Fig. 4 be show according to a second embodiment of the present invention, the switch shape that determines the cell on multiple frequency subbands
The flow chart of state operated in detail.
Fig. 5 be show according to a third embodiment of the present invention, the switch shape that determines the cell on multiple frequency subbands
The flow chart of state operated in detail.
Fig. 6 is the block diagram for showing the controlling equipment according to an embodiment of the present invention for cell.
Fig. 7 is the block diagram for showing the exemplary structure of dispatching device 603 shown in fig. 6.
Fig. 8 is the block diagram for showing the first exemplary structure of pre-scheduling device 601 shown in fig. 6.
Fig. 9 is the block diagram for showing the second exemplary structure of pre-scheduling device 601 shown in fig. 6.
Figure 10 is the block diagram for showing the third exemplary structure of pre-scheduling device 601 shown in fig. 6.
Specific embodiment
The dispatching method and controlling equipment according to an embodiment of the present invention for cell described below with reference to accompanying drawings.?
In attached drawing, identical reference label indicates identical element from beginning to end.It is understood that the embodiments described herein is only to say
Bright property, and be not necessarily to be construed as limiting the scope of the invention.
Firstly, A and Figure 1B describes the exemplary application scene of the embodiment of the present invention referring to Fig.1.
Figure 1A shows the first exemplary application scene.The scene is based on centralized Radio Access Network (C-RAN) frame
Structure, wherein by control unit (such as Base Band Unit (BBU)) and be connected to the multiple of the Base Band Unit and (for the sake of simplicity, scheming
Three are shown in 1A) long distance wireless head RRH forms centralized base station eNB, and each RRH can form a cell.These three cells
Constitute the collaboration set of CoMP.A BBU can be set for each cell (or RRH), the BBU can serve as scheduler to carry out
The scheduling of respective cell.Figure 1B shows second of exemplary application scene, wherein three base station eNBs be respectively formed it is three small
Area.These three cells constitute collaboration set.One scheduler (not shown) can be set in each eNB to carry out respective cell
Scheduling.It should be appreciated that although the quantity for only showing three RRH and three eNB, RRH and eNB in Figure 1A and Figure 1B is unlimited
In 3, but it can be any right quantity determine according to actual needs.
In the following, describing the dispatching method for cell according to a first embodiment of the present invention referring to Fig. 2.As described above,
This method can be by the scheduler or BBU(BBU1, BBU2 or BBU3 for example shown in figure 1A for each cell) execute so as to
The scheduling for carrying out respective cell, thus the distributed scheduling in the case of realizing multi-cell cooperating.In an embodiment of the present invention, with
The example of frequency subband or resource block as the frequency resource, it should be appreciated that the frequency resource is also possible to use
The other kinds of frequency resource of the basic unit to work as dispatcher.
As shown in Fig. 2, in step s 201, determining the cell in multiple frequency the cell of scheduling to be executed
The switch state taken.Hereinafter, for ease of description, the cell for currently executing scheduling is known as serving cell.
In Comp transmission technology, cooperative scheduling is carried out to the multiple cells for belonging to the same collaboration set, it is each to coordinate
A cell sends and receives, to reduce the interference between cell.In an embodiment of the present invention, by for the multiple
Each frequency subband in frequency subband selectively closes off one or more cells in (mute) the multiple cell, i.e.,
So that one or more cell does not send data on the frequency subband, to reduce the interference that other cells are subject to.Therefore,
It needs to be determined that switch state (or be switching mode (pattern)) of each cell on each frequency subband, that is, Mei Ge little
Area is to open or close on each frequency subband, this is properly termed as the pre-scheduling of cell.
Determine the serving cell in multiple frequency subbands in the following, being described in more detail in step S201 referring to Fig. 3
On switch state method.
As shown in figure 3, calculating in step S2011 and working as each frequency of the serving cell in the multiple frequency subband
The performance loss of serving cell when being closed on subband.
Specifically, it is assumed that share n frequency subband, can calculate when serving cell on all n frequency subbands not
The maximum performance P for the serving cell that can be obtained when closingmax.For this purpose, can be scheduled on each frequency subband, with
Determine the user for distributing to each frequency subband.For example, for each frequency subband, it can be according to each use from serving cell
The CSI(of family feedback is as described below) performance corresponding with the user is calculated, and the user for selecting performance best is as distribution
To the user of the frequency subband.It is then possible to which estimating that the user for being assigned to each frequency subband is communicated can obtain
The sum of the performance of serving cell, this corresponds to the maximum performance of serving cell.The performance can be the handling capacity of cell,
In this case, the sum of the handling capacity that can be realized by the user distributed on each frequency subband can be calculated, as this
The maximum performance of serving cell.The method for estimating the performance for the serving cell that can be obtained on each frequency subband is this field
It is well known, it repeats no more herein.
Next, can calculate when being closed on each frequency subband when serving cell in the multiple frequency subband
The performance of serving cell.Specifically, it can calculate when serving cell is closed on the first frequency subband in this n frequency subband
When estate performance Psb1-mute.For example, can be adjusted on other each frequency subbands other than first frequency subband
Degree distributes to the users of other each frequency subbands to determine, then calculate other than first frequency subband other are each
The performance P for the serving cell that can be obtained when being communicated on a frequency subband by the user distributedsb1-mute.Similarly, may be used
With calculate when serving cell second frequency subband, third frequency subband ... the clothes that can obtain when closing on the n-th frequency subband
The performance P for cell of being engaged insb2-mute、Psb3-mute、…、Psbn-mute。
Then, the maximum performance P based on serving cellmaxWith it is small when serving cell is closed on each frequency subband
The performance P in areasb1-mute、Psb2-mute、Psb3-mute、…、Psbn-mute, the quilt on each frequency subband can be calculated when serving cell
Estate performance loss when closing.In an embodiment of the present invention, it can calculate separately when serving cell is in each frequency subband
On when being closed cell performance Psb1-mute、Psb2-mute、Psb3-mute、…、Psbn-muteWith the maximum performance PmaxBetween ratio
Rate rsb1-mute、rsb2-mute、rsb3-mute、…、rsbn-mute, since the ratio is able to reflect since serving cell is in each frequency
Estate performance caused by being closed is taken relative to the maximum performance PmaxReduction degree, therefore it can be indirectly anti-
Reflect the performance loss.In another embodiment, the maximum performance P of serving cell can be calculatedmaxWith when serving cell each
The performance P of cell when being closed on frequency subbandsb1-mute、Psb2-mute、Psb3-mute、…、Psbn-muteBetween difference, and use
Each difference and maximum performance PmaxBetween ratio directly reflect the performance loss.It, can also be direct in another embodiment
Use each difference as the performance loss.
Next, in step S2012, according to the serving cell when serving cell is closed on each frequency subband
Whether performance loss is more than loss threshold value, determines switch state of the serving cell on the frequency subband.In implementation of the invention
It, can be respectively by ratio r in examplesb1-mute、rsb2-mute、rsb3-mute、…、rsbn-muteRespectively with rate threshold rthresholdCompared
Compared with whether being more than loss threshold value with the determination performance loss, wherein loss threshold value may be calculated 1-rthreshold.For example,
When ratio r corresponding with frequency subband i(1≤i≤n)sbi-muteGreater than rate threshold rthresholdWhen, if this explanation service is small
Area is closed on frequency subband i, then the performance loss of serving cell is less than loss threshold value, that is, closes on the frequency subband
Serving cell is smaller on the influence of the performance of the serving cell, hence, it can be determined that switch of the serving cell on the frequency subband
State is to close., whereas if ratio rsbi-muteLess than rate threshold rthresholdIf this explanation serving cell is in frequency
It is closed on band i, the performance loss of serving cell is greater than loss threshold value, that is, serving cell is closed on the frequency subband to this
The performance of serving cell is affected, hence, it can be determined that the serving cell should not be closed.It can be seen that the rate threshold
Bigger, i.e. loss threshold value is smaller, then serving cell will be closed on fewer frequency subband, conversely, the rate threshold is got over
Small, i.e. loss threshold value is bigger, then serving cell will be closed on more frequency subbands.The rate threshold can be according to setting
Meter needs and/or other factors are flexibly set.Fixed value can be set by rate threshold.For example, can be by the ratio threshold
Value is set as (n-1)/n, it means that serving cell can be closed at least one frequency subband.Alternatively, can by this ratio
It is 5%), therefore, to work as ratio r that rate threshold value, which is set as the corresponding loss threshold value of 0.95(,sbi-muteWhen more than 95%, the cell is at this
It is closed on frequency subband i, otherwise the cell is opened on frequency subband i.In addition it is also possible to which set rate threshold to can
The value of change.Such as rate threshold can be set to the value that can change according to the business load dynamic of network, so that when business is negative
When carrying larger, rate threshold can be increased, so that the frequency subband that the cell may close on it is reduced, and when business is negative
When carrying smaller, rate threshold can reduce, so that the frequency subband that the cell may close on it increases.
By being carried out operation shown in Fig. 3 for each frequency subband, the cell can be determined in each frequency
The switch state taken.
Fig. 2 is returned, in step S202, the multiple frequency of each leisure is exchanged with the neighboring community of the serving cell
The switch state (or switching mode) taken.For example, can be by back haul link (backhaul) in serving cell and adjacent small
The switch state on each the multiple frequency subband of leisure is exchanged between area.In this way, each cell in collaboration set can obtain
Know switch state of other cells on each frequency subband.
Then, in step S203, a variety of channel state informations of user's (mobile station) based on serving cell feedback and
Switch state of the neighboring community on the multiple frequency subband is scheduled.
Specifically, each frequency subband is needed to know in order to which user's (mobile station) to serving cell is scheduled
Radio channel state between the user and the base station of serving cell.For this purpose, can be from the user to described in base station feedback reflection
The channel state information (CSI) of radio channel state, such as channel quality indicator (CQI).In an embodiment of the present invention, right
It, can be corresponding a variety of from user feedback and the different switch states of serving cell and the neighboring community in each frequency subband
CSI.For example, in the case where collaboration set includes multiple cells, these cells can have it is fully open, all close and
Partially open and part close etc. a variety of switch states.The serving cell and the different switch states of the neighboring community can be with
It is all or part of in these switch states.Specifically, the user can calculate and the whole in these switch states
Or a part of corresponding CSI, and it is fed back to serving cell (base station).The user calculates corresponding with various switch states
The specific method of CSI be it is known in the art that repeating no more herein.In an embodiment of the present invention, the user can be with
It is the edge customer of serving cell, in other embodiments, the user can be any user of serving cell.
Due to having learned that switch state of the neighboring community of serving cell on each frequency subband in step S202,
Therefore, it for each frequency subband, can be selected from a variety of CSI of user feedback and the switch state pair of the neighboring community
The CSI answered is then based on selected CSI to be scheduled, such as is allocated to the MCS grade of the user of the frequency subband
Selection so that user using the MSC grade carry out data transmission.For example, including two cells (that is, service in collaboration set
Cell and a neighboring community) in the case where, if the switch state of serving cell is to open, phase for some frequency subband
The switch state of adjacent cell be close, then can from a variety of CSI of user feedback, select with serving cell opening and it is adjacent small
The state corresponding CSI that area closes carries out the scheduling.It as another example, include that (service is small for three cells in collaboration set
Area, neighboring community 1, neighboring community 2) in the case where, if the switch state of serving cell is to beat for some frequency subband
It opens, the switch state of neighboring community 1 is to open, and the switch state of neighboring community 2 is to close, and distribute to the frequency subband
The cooperation cell of user is cell 3, then can select from a variety of CSI for the user feedback for distributing to the frequency subband and service
The corresponding CSI of state that cell is opened, neighboring community 1 opens and neighboring community 2 closes, and institute is carried out based on the CSI
State scheduling.
In dispatching method according to a first embodiment of the present invention, based on from user feedback a variety of channel state informations and
Switch state of the neighboring community on the multiple frequency subband is scheduled, this makes by being scheduling to user's selection
MCS grade is better adapted to radio channel state when scheduling, that is, so that scheduling result is better adapted to wireless environment
Variation, so as to improve system performance, such as the handling capacity of system.
It should be appreciated that dispatching method according to a first embodiment of the present invention described above is merely exemplary, rather than
It is restrictive.Those skilled in the art can according to the design needs make a change it, without departing from spirit and model of the invention
It encloses.For example, calculating the performance of the serving cell when serving cell is closed on a frequency subband in above-mentioned steps S201
Loss, and whether be more than loss threshold value according to the performance loss, determine serving cell in the switch state of the frequency subband.It can
Alternatively, the performance loss of the serving cell when serving cell is closed on two or more frequency subbands can be calculated, and
And according to the performance loss whether be more than loss threshold value, determine switch of the serving cell on described two or more frequency subbands
State.In such a case, it is possible to calculate the maximum performance P of serving cell as described abovemax, then can calculate when service
The performance of cell serving cell when being closed simultaneously on described two or more frequency subbands, to obtain when serving cell exists
The performance loss of serving cell when being closed simultaneously on described two or more frequency subbands.It then, can be according to the performance
Whether loss is more than loss threshold value, determines switch state of the serving cell on described two or more frequency subbands.For example, working as
When the performance loss is more than loss threshold value, it can determine that serving cell is opened on described two or more frequency subbands, and
When the performance loss is no more than loss threshold value, it can determine serving cell on described two or more frequency subbands simultaneously
It closes.The loss threshold value can be arranged as already mentioned above, repeat no more herein.
In dispatching method according to a first embodiment of the present invention, when in step s 201 determine serving cell in multiple frequencies
When switch state on rate subband, the information (such as CSI) of serving cell is only considered, the information without considering adjacent base station.From
From the perspective of entire collaboration set, determining switch state is not necessarily optimal in this way.Specifically, this method is to guarantee
The serving cell is closed in the lesser situation of serving cell oneself performance loss, to wish to reduce the interference to neighboring community, so
And due to not accounting for neighboring community when determining switch state, so if serving cell is opened on some frequency subband
Off status is confirmed as closing, this may generate two kinds of results: although (1) serving cell is closed such that the serving cell
Reduced performance, but therefore neighboring community can but obtain biggish performance gain, in this case, from entire collaboration set
From the point of view of angle, it is believed that identified switch state is appropriate；(2) serving cell is closed such that the property of the serving cell
It can reduce, while this self-sacrifice of serving cell cannot but make neighboring community obtain biggish performance gain, in this feelings
Under condition, identified switch state is obviously unsuitable.In order to solve this problem, the second implementation according to the present invention is proposed
The dispatching method of example, in this approach, in the switch state for determining serving cell, it is contemplated that the letter from neighboring community
Breath.
Compared with each step S201-S203 of dispatching method according to a first embodiment of the present invention, according to the present invention
The difference is that only for the method for two embodiments executes step S201(that is, determining serving cell on each frequency subband
Switch state) concrete mode it is different.For the sake of simplicity, hereinafter, only the difference will be described, and omission pair
The detailed description of same section.
Fig. 4 show in the dispatching method for cell according to a second embodiment of the present invention execute step S201(that is,
Determine switch state of the serving cell on the multiple frequency subband) concrete mode.
As shown in figure 4, in step S2011 ', to each frequency subband in the multiple frequency subband carry out pre-scheduling with
Determine the user for distributing to the frequency subband.Can be determined in the way of being described above with reference to Fig. 3 distribute to it is each
The user of frequency subband.
Next, for each frequency subband, determine whether distributed user is edge customer in step S2012 ',
If the user distributed is edge customer, the cooperation cell (neighboring community) of the edge customer is sent and requests the cooperation
The turn-off request that cell is closed on the frequency subband.It should be noted that if not being for the user of some frequency subband distribution
Edge customer does not send the turn-off request then, in other words, for the frequency subband, does not need to execute step S2012 '.It can be with
Determine whether distributed user is edge customer using any method well known in the art, omits it herein and retouch in detail
It states.
Then, it in step S2013 ', receives from neighboring community, request serving cell and is closed on the frequency subband
Turn-off request.Specifically, since the neighboring community in collaboration set is also executing dispatching method according to a second embodiment of the present invention,
Therefore neighboring community may also send the turn-off request to serving cell, and correspondingly, serving cell can receive from adjacent
The turn-off request of cell.
Next, in step S2014 ', according to the quantity of the quantity of the turn-off request of transmission and received turn-off request, really
Determine switch state of the serving cell on the frequency subband.
Specifically, one counter can be set for each frequency subband, initial value can be set to 0, and whenever
As soon as send turn-off request to other cells from serving cell, the value of the counter is reduced 1, and whenever serving cell connects
As soon as receive the turn-off request from neighboring community, 1 will be increased for the value of the counter of frequency subband setting.Therefore,
The value of the counter is the difference of the quantity of the quantity of the received turn-off request of serving cell and the turn-off request of transmission, in this way,
The value of the counter can be used to determine switch state of the serving cell on the frequency subband.For example, can be set one
Amount threshold, and according to the value of counter whether be greater than the amount threshold determine serving cell on the frequency subband whether
It should close.It is any suitable that the amount threshold can be flexibly set according to many factors (such as closeness according to cell)
When value.Preferably, the amount threshold can be set to the value not less than 1, such as 1 or 2.It is set by the amount threshold
It is set in 1 example, for some frequency subband, if the value of counter is greater than the amount threshold 1, this illustrates the received pass of institute
It is one at least more than transmitted turn-off request to close request, in other words, the quantity for the neighboring community that request serving cell is closed is more
Therefore quantity in the neighboring community closed by service cell request can close serving cell, enable adjacent cells to obtain
Obtain bigger performance gain enables serving cell to obtain bigger performance gain conversely, can then open serving cell.
It will recognize, set amount threshold is bigger, and serving cell is more difficult to be closed, in other words, in each cell of collaboration set
In, pent cell is fewer.
Determine that serving cell after the switch state on each frequency subband, can execute and referring to figure as described above
The step S202 and S203 of 2 descriptions identical step, to realize the scheduling of community user.It repeats no more herein.
In dispatching method according to a second embodiment of the present invention, the closing sent from serving cell to neighboring community is considered
Request and the relative populations of turn-off request sent from neighboring community to serving cell determine the switch state of serving cell.This
So that the influence that may cause to the performance of neighboring community has been taken into account in the switch state for determining serving cell, to the greatest extent may be used
Energy the performance to neighboring community is avoided to bring significant adverse effect.
The dispatching method for cell according to a third embodiment of the present invention is described below.Implement with according to the present invention first
Each step S201-S203 of the dispatching method of example is compared, and the difference of method according to a third embodiment of the present invention only exists
In executing step S201(that is, determining switch state of the serving cell on the multiple frequency subband) concrete mode it is different,
It has also contemplated the information from adjacent base station.For the sake of simplicity, hereinafter, only the difference will be described, and
Omit the description to same section.
In the following, describing to execute step in the dispatching method for cell according to a third embodiment of the present invention referring to Fig. 5
Rapid S201(is that is, determine switch state of the serving cell on multiple frequency subbands) concrete mode.
As shown in figure 5, carrying out pre-scheduling to each frequency subband in the multiple frequency subband in step S2011 ' '
To determine the user for distributing to the frequency subband.It can determine and be distributed to often in the way of being described above with reference to Fig. 3
The user of a frequency subband.
In step S2012 ' ', for each frequency subband, determine whether distributed user is edge customer, if institute
The user of distribution is edge customer, then sends the first information to the cooperation cell of the edge customer, and institute is worked as in first information instruction
Stating cooperation cell will be to the cell bring performance gain (not relative to the cooperation cell when closing in the frequency resource
When closing).
Specifically, for each frequency subband, can preparatory definition performance gain table, can will be in frequency
Take the performance gain that each cell in collaboration set can be obtained since other cells are closed entire scope be divided into it is more
A section, and each section is indicated with corresponding more bit informations.For example, entire performance gain range can be divided into
4 sections, and each section is indicated with 2 bit values, in this case, an example of the performance gain table is as follows
Shown in table 1:
| Performance gain | 2 bit values | Explanation |
| (- ∞, 1) | 00 | If cooperation cell is closed, performance gain very little (less than 1) |
| (1,3) | 01 | If cooperation cell is closed, performance gain is located in (1,3) section |
| (3,5) | 10 | If cooperation cell is closed, performance gain is located in (3,5) section |
| (5, ∞) | 11 | If cooperation cell is closed, performance gain is greater than 5 |
Table 1
In this way, when carrying out the scheduling of serving cell, if the user distributed is that edge is used for some frequency subband
Family can then determine that serving cell is by the performance gain of acquisition when the closing of the cooperation cell of the user, and according to institute above
The performance gain table stated, the cooperation cell Xiang Suoshu send the information (that is, first information) for indicating the performance gain accordingly, make
When the proper cooperation cell receives the first information, it can know that turn itself off will be to the clothes according to the performance gain table
Business cell bring performance gain.For example, when the performance gain is 4 binary value " 10 " can be sent to cooperation cell
As the first information, so that the cooperation cell for receiving the binary value obtains, turn itself off will be to serving cell bring
Performance gain is in section (3,5).It should be noted that if the user to the distribution of some frequency subband is not edge customer, no
The first information is sent, in other words, for the frequency subband, does not need to execute step S2012 ' '.
Next, receiving the second information from neighboring community in step S2013 ', second information instruction is small when servicing
Area will give neighboring community's bring performance gain when closing on the frequency subband.Specifically, due to the phase in collaboration set
Adjacent cell also executing dispatching method according to a third embodiment of the present invention, therefore neighboring community may also as described above
Mode sends instruction to serving cell will be to neighboring community's bring when serving cell is closed on the frequency subband
The information of energy gain, i.e. the second information.Correspondingly, serving cell can receive second information.
Then, in step S2014 ' ', according to the first information with the second information, determine the cell on the frequency subband
Switch state.For example, for the frequency subband, if performance gain (or the property for the first information instruction that serving cell is sent
Can the sum of gain) be less than the performance gain (or the sum of performance gain) indicated from received second information in neighboring community, then it can be with
Determine that switch state of the serving cell on the frequency subband is to close, otherwise can determine serving cell on the frequency subband
It opens.Specifically, one counter can be set for each frequency subband, initial value may be configured as 0.Furthermore, it is possible to not
Same performance gain section assigns different increments, so that when receiving second information in instruction different performance gain section,
The value of counter is increased into corresponding increment, and when having sent the first information in instruction different performance gain section, it will count
The value of device reduces corresponding increment.Then, determine serving cell in the frequency according to whether the value of counter is greater than predetermined threshold
Switch state on rate subband.The predetermined threshold can be flexibly set according to the design needs, such as 0.Show shown in the table 1
Example in, if such as be arranged to send or receive binary value " 00 ", keep Counter Value constant, if hair
Send/have received binary value " 01 ", then reduce Counter Value/increase by 2, it, will if sending/having received binary value " 10 "
Counter Value reduces/increase by 4, if sending/having received binary value " 11 ", Counter Value is reduced/increase by 6.Then, lead to
It crosses and is compared Counter Value and preset threshold value 0.If Counter Value is greater than 0, this illustrates that serving cell is closed to adjacent
Cell bring performance gain closes greater than neighboring community and gives serving cell bring performance gain, from the angle of entire collaboration set
Consider, serving cell should be closed., whereas if Counter Value, less than 0, this illustrates that serving cell is closed and brings to neighboring community
Performance gain be less than neighboring community and close and answered from the point of view of entire collaboration set to serving cell bring performance gain
When opening serving cell.
Determine that serving cell after the switch state on multiple frequency subbands, can execute and referring to figure as described above
The step S202 and S203 of 2 descriptions identical step, to realize the scheduling of community user.It repeats no more herein.
With respect to the dispatching method of first embodiment of the invention, dispatching method according to a third embodiment of the present invention exists
Determine serving cell in the switch state on each frequency subband, it is also considered that the information from neighboring community, to take into account
The influence that may cause to the performance of neighboring community, avoids the performance to neighboring community from bringing significant adverse effect.In addition,
With respect to the dispatching method of second embodiment of the invention, in dispatching method according to a third embodiment of the present invention, due to
First and second information more accurately show to close due to serving cell to neighboring community's bring performance gain and due to
Neighboring community, which closes, gives serving cell bring performance gain, and therefore, the scheduling result being achieved in that has comprehensively considered collaboration set
In each cell performance, to effectively improve the performance of entire collaboration set.
In the following, describing the controlling equipment according to an embodiment of the present invention for cell referring to Fig. 6, can execute upper
The dispatching method for cell of described in the text.As described above, one controlling equipment is set for each cell in collaboration set.
For example, controlling equipment is respectively set for cell 1-3 in the application scenarios shown in Figure 1A and Figure 1B.These three controlling equipments can
To be connected via back haul link.These controlling equipments can be used as BBU and be arranged in control unit shown in figure 1A, or
Person is separately positioned in each eNB shown in Figure 1B.In fig. 6 it is shown that three scheduling for being respectively used to cell 1-3 are set
It is standby, it is structurally and operationally essentially identical due to them, hereinafter carried out by taking the controlling equipment 600 for cell 1 as an example
Description.
As shown in fig. 6, controlling equipment 600 includes pre-scheduling device 601, communication device 602 and dispatching device 603.
Pre-scheduling device 601 determines switch state of the serving cell (being cell 1 in Fig. 6) on multiple frequency subbands
(i.e. switching mode).Pre-scheduling device 601 can be realized with various ways, will be described in pre-scheduling device 601 later.
It is the multiple that neighboring community's (being cell 2 and 3 in Fig. 6) of communication device 602 and serving cell exchanges each leisure
Switch state on frequency subband.For example, communication device 602 can be via back haul link and the communication device of neighboring community (not
Show) communication, to exchange the switch state.
A variety of CSI of user feedback of the dispatching device 603 based on serving cell and the neighboring community are in the multiple frequency
Switch state on rate subband is scheduled.As described above, a variety of CSI include respectively with the cell and the phase
The corresponding CSI of different switch states of adjacent cell.Fig. 7 shows the specific structure of dispatching device 603.As shown in fig. 7, scheduling dress
Setting 603 may include selecting unit 6031 and scheduling unit 6032.Selecting unit 6031 can be for each frequency subband, from institute
It states and selects CSI corresponding with the switch state of the neighboring community in multiple CSI.Scheduling unit 6032 can be based on selected
CSI is scheduled.For example, scheduling unit 6031 can based on selected CSI to distribute to the user of the frequency subband into
Row scheduling, selects the MCS grade of the user, so that user carries out the transmission of data using the MSC grade.6031 He of selecting unit
Scheduling unit 6032 can execute its operation in the way of describing above with reference to Fig. 2, herein for the sake of simplicity and
It omits the detailed description.
In the following, will be described in pre-scheduling device 601.As described below, pre-scheduling device can be realized with various ways
601。
Fig. 8 shows the first exemplary structure of pre-scheduling device 601.As shown in figure 8, pre-scheduling device 601 includes
Computing unit 6011 and determination unit 6012.Computing unit 6011 can calculate one in the frequency subband when serving cell
The performance loss of serving cell when being closed on a or multiple frequency subbands.As described above, computing unit 6011 can calculate
The performance loss of serving cell when serving cell is closed on each frequency subband can also be calculated when serving cell is two
The performance loss of serving cell when being closed simultaneously on a or more frequency subband.Determination unit 6012 can be damaged according to the performance
Whether be more than loss threshold value, determine switch state of the serving cell on one or more of frequency subbands if losing.Computing unit
6011 and determination unit 6012 can execute respective operation according to the method that describes above with reference to Fig. 3, herein in order to
It avoids repeating and omitting the detailed description.
Fig. 9 shows second of exemplary structure of pre-scheduling device 601.As shown in figure 9, pre-scheduling device 601 includes
Pre-scheduling unit 6011 ', communication unit 6012 ' and determination unit 6013 '.
Pre-scheduling unit 6011 ' can carry out pre-scheduling to each frequency subband, distribute to the frequency subband with determination
User.In addition, pre-scheduling unit 6011 ' can also determine whether the user for distributing to each frequency subband is edge customer.In advance
Scheduling unit 6011 ' can execute pre-scheduling in the way of describing above with reference to Fig. 4 and determine edge customer,
Here it omits the detailed description.
Communication unit 6012 ' can be when the user for distributing to the frequency subband be edge customer, to the edge customer
Cooperation cell sends the turn-off request for requesting the cooperation cell to be closed on the frequency subband.In addition, communication unit 6012 ' is also
It can receive the turn-off request that from neighboring community, the request cell is closed on the frequency subband.Communication unit 6012 '
The turn-off request can be sent to cooperation cell by back haul link and receive the turn-off request sent from neighboring community.Together
Sample, if the user is not edge customer, communication unit 6012 ' can not execute above-mentioned transmission operation.
Determination unit 6013 ' can be determined according to the quantity of the turn-off request of transmission and the quantity of received turn-off request
Switch state of the serving cell on the frequency subband.For example, when for some frequency subband, received turn-off request number
When the difference of the quantity of amount and the turn-off request sent is greater than scheduled amount threshold, determination unit 6013 ' can determine the clothes
Business cell is closed on the frequency subband.Determination unit 6013 ' can determine in the way of describing above with reference to Fig. 4
The switch state of the cell, repeats no more herein.Furthermore, it is possible to be arranged the quantity threshold in above-described manner
Value.
Figure 10 shows the third exemplary structure of pre-scheduling device 601.As shown in Figure 10, pre-scheduling device 601 wraps
Include pre-scheduling unit 6011 ' ', communication unit 6012 ' ' and determination unit 6013 ' '.
Identical as pre-scheduling unit 6011 ' shown in Fig. 9, pre-scheduling unit 6011 ' ' can carry out each frequency subband
The user of the frequency subband is distributed in pre-scheduling to determine.In addition, pre-scheduling unit 6011 ' ' can also determine distribute to it is each
Whether the user of frequency subband is edge customer.
Communication unit 6012 ' can use the edge in the case where distributing to the user of frequency subband is edge customer
The cooperation cell at family sends the first information, and first information instruction will give when the cooperation cell is closed in the frequency resource
Serving cell bring performance gain, as described above.In addition, communication unit 6012 ' ' it may also receive from neighboring community
Second information, second information instruction will give neighboring community's bring when serving cell is closed on the frequency subband
It can gain.
Determination unit 6013 ' ' serving cell can be determined in the frequency subband according to the first information with the second information
On switch state.For example, indicated when the performance gain for some frequency subband, first information instruction less than the second information
When performance gain, the determination unit 6013 ' ' determine that the serving cell is closed on the frequency subband.Determination unit
6013 ' ' switch shape of the serving cell on frequency subband can be determined in the way of describing above with reference to Fig. 5
State omits the detailed description for the sake of simplicity herein.
By the dispatching method and controlling equipment according to the above embodiment of the present invention for cell, can with it is very short when
Between interval (such as 1ms) be scheduled, and channel state information from user feedback can be considered when executing scheduling, by
Change in the dynamic that the channel state information is able to reflect wireless environment, therefore, uses scheduling according to an embodiment of the present invention
The scheduling result that method and controlling equipment obtain can be better adapted to the change of wireless environment, to improve system performance.
In addition, above-mentioned scheduler can be implemented by hardware, the reality of the software module as performed by processor can also be passed through
It applies, can also be implemented by the combination of the two.Software module also can be set in RAM(random access memory), flash storage
Device, ROM(read-only memory), EPROM(erasable programmable ROM), EEPROM(electric erasable and programming ROM), register,
In any form of storage medium such as hard disk, removable disk or CD-ROM.The storage medium is connected to processor, so that the processing
Device can be to the storage medium reading writing information.In addition, the storage medium is also desirably integrated into processor.In addition, the storage medium
It also can be set with processor in specific integrated circuit (ASIC).The ASIC also can be set in above-mentioned control unit or wireless
In base station eNB.In addition, the storage medium and processor can also be used as discrete component and above-mentioned control unit or wireless are arranged in
In base station eNB.
While there has been shown and described that example embodiments of the present invention, it will be appreciated by those skilled in the art that not carrying on the back
In the case where from the scope and spirit of the present invention limited in appended claims and their equivalents, these example embodiments can be done
Variation on various forms and details out.
Claims (14)
1. a kind of dispatching method for cell, comprising:
Determine switch state of the cell in multiple frequency resources；
The switch state in each the multiple frequency resource of leisure is exchanged with the neighboring community of the cell；And
A variety of channel state informations of user feedback based on the cell and the neighboring community are in the multiple frequency resource
On switch state be scheduled,
Wherein it is determined that switch state of the cell in multiple frequency resources includes:
Calculate the property of cell when being closed in one or more frequency resources when the cell in the multiple frequency resource
The loss of energy；
Whether it is more than loss threshold value according to the performance loss, determines the cell in one or more of frequency resources
Switch state.
2. a kind of dispatching method for cell, comprising:
Determine switch state of the cell in multiple frequency resources；
The switch state in each the multiple frequency resource of leisure is exchanged with the neighboring community of the cell；And
A variety of channel state informations of user feedback based on the cell and the neighboring community are in the multiple frequency resource
On switch state be scheduled,
Wherein it is determined that switch state of the cell in multiple frequency resources includes:
Pre-scheduling is carried out to determine the user for distributing to the frequency resource to each frequency resource；
If the user for distributing to the frequency resource is edge customer, the cooperation cell of the edge customer is sent described in request
The turn-off request that cooperation cell is closed in the frequency resource；
Receive the turn-off request that from neighboring community, the request cell is closed in the frequency resource；And
According to the quantity of the quantity of the turn-off request of transmission and received turn-off request, determine the cell in the frequency resource
Switch state.
3. method according to claim 2, wherein when for some frequency resource, the quantity of the received turn-off request
And when the difference of the quantity of the turn-off request of transmission is greater than amount threshold, determine that the cell is closed in the frequency resource.
4. a kind of dispatching method for cell, comprising:
Determine switch state of the cell in multiple frequency resources；
The switch state in each the multiple frequency resource of leisure is exchanged with the neighboring community of the cell；And
A variety of channel state informations of user feedback based on the cell and the neighboring community are in the multiple frequency resource
On switch state be scheduled,
Wherein it is determined that switch state of the cell in multiple frequency resources includes:
Pre-scheduling is carried out to determine the user for distributing to the frequency resource to each frequency resource；
If the user for distributing to the frequency resource is edge customer, the first letter is sent to the cooperation cell of the edge customer
Breath, first information instruction will increase when the cooperation cell is closed in the frequency resource to the cell bring performance
Benefit；
The second information from neighboring community is received, second information instruction will when the cell is closed in the frequency resource
To neighboring community's bring performance gain；And
According to the first information with the second information, switch state of the cell in the frequency resource is determined.
5. method as claimed in claim 4, wherein when for some frequency resource, the performance gain of first information instruction is small
When the performance gain of the second information instruction, determine that the cell is closed in the frequency resource.
6. the method as described in one of claim 1 to 5, wherein a variety of channel state informations of the user feedback of the cell
Including channel state information corresponding from the different switch states of the cell and the neighboring community respectively.
7. the method as described in one of claim 1 to 5, wherein a variety of channel status of the user feedback based on the cell
The switch state of information and the neighboring community in the multiple frequency resource includes: to be scheduled
For each frequency resource, selected from a variety of channel state informations corresponding with the switch state of the neighboring community
Channel state information；And
It is scheduled based on selected channel state information.
8. a kind of controlling equipment for cell, comprising:
Pre-scheduling device is configured to determine that switch state of the cell in multiple frequency resources；
Communication device is configured as exchanging the switch shape in each the multiple frequency resource of leisure with the neighboring community of the cell
State；And
Dispatching device, a variety of channel state informations and the neighboring community for being configured as the user feedback based on the cell exist
Switch state in the multiple frequency resource is scheduled, wherein the pre-scheduling device includes:
Computing unit is configured as calculating when the cell is closed in one or more frequency resources in the frequency resource
The performance loss of cell when closing；
Whether determination unit is configured as according to the performance loss being more than loss threshold value, determine the cell one or
Switch state in multiple frequency resources.
9. a kind of controlling equipment for cell, comprising:
Pre-scheduling device is configured to determine that switch state of the cell in multiple frequency resources；
Communication device is configured as exchanging the switch shape in each the multiple frequency resource of leisure with the neighboring community of the cell
State；And
Dispatching device, a variety of channel state informations and the neighboring community for being configured as the user feedback based on the cell exist
Switch state in the multiple frequency resource is scheduled,
Wherein, the pre-scheduling device includes:
Pre-scheduling unit is configured as carrying out pre-scheduling to each frequency resource to determine the user for distributing to the frequency resource；
Communication unit, if the user for being configured as distributing to the frequency resource is edge customer, to the association of the edge customer
Make cell and send the turn-off request for requesting the cooperation cell to be closed in the frequency resource, and is additionally configured to receive and come from
Neighboring community, turn-off request that the request cell is closed in the frequency resource；And
Determination unit, is configured as the quantity of the quantity and received turn-off request according to the turn-off request of transmission, determine described in
Switch state of the cell in the frequency resource.
10. equipment as claimed in claim 9, wherein when for some frequency resource, the quantity of the received turn-off request
And when the difference of the quantity of the turn-off request of transmission is greater than amount threshold, the determination unit determines the cell in the frequency resource
Upper closing.
11. a kind of controlling equipment for cell, comprising:
Pre-scheduling device is configured to determine that switch state of the cell in multiple frequency resources；
Communication device is configured as exchanging the switch shape in each the multiple frequency resource of leisure with the neighboring community of the cell
State；And
Dispatching device, a variety of channel state informations and the neighboring community for being configured as the user feedback based on the cell exist
Switch state in the multiple frequency resource is scheduled,
Wherein, the pre-scheduling device includes:
Pre-scheduling unit is configured as carrying out pre-scheduling to each frequency resource to determine the user for distributing to the frequency resource；
Communication unit, if the user for being configured as distributing to the frequency resource is edge customer, to the association of the edge customer
Make cell and send the first information, first information instruction will give described small when the cooperation cell is closed in the frequency resource
Area's bring performance gain, and it is additionally configured to receive the second information from neighboring community, and second information instruction is worked as
The cell will give neighboring community's bring performance gain when closing in the frequency resource；And
Determination unit is configured as determining switch of the cell in the frequency resource with the second information according to the first information
State.
12. equipment as claimed in claim 11, wherein when for some frequency resource, the performance gain of first information instruction
Less than the second information instruction performance gain when, the determination unit determines that the cell is closed in the frequency resource.
13. the equipment as described in one of claim 8 to 12, wherein a variety of channel status of the user feedback of the cell are believed
Breath includes channel state information corresponding from the different switch states of the cell and the neighboring community respectively.
14. the equipment as described in one of claim 8 to 12, wherein the dispatching device includes:
Selecting unit is configured as each frequency resource, from a variety of channel state informations selection with it is described adjacent
The corresponding channel state information of the switch state of cell；And
Scheduling unit is configured as being scheduled based on selected channel state information.
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| JP2014117801A JP6404000B2 (en) | 2013-06-08 | 2014-06-06 | Scheduling method and scheduling device for cell |
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| US10623987B2 (en) | 2015-05-22 | 2020-04-14 | Ntt Docomo, Inc. | User apparatus and base station |
| JP6685295B2 (en) | 2015-05-22 | 2020-04-22 | 株式会社Ｎｔｔドコモ | base station |
| CN110506432B (en) | 2017-03-31 | 2021-06-22 | 华为技术有限公司 | Cooperative cell determination method and network equipment |
| CN109922499B (en) * | 2017-12-12 | 2022-04-22 | 成都鼎桥通信技术有限公司 | Self-adaptive pre-scheduling method and device |
| WO2023065260A1 (en) * | 2021-10-22 | 2023-04-27 | Huawei Technologies Co.,Ltd. | Wireless apparatus and method for mobile network power saving |
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| CN102036385B (en) * | 2009-09-24 | 2015-07-01 | 株式会社Ntt都科摩 | Method for scheduling resources among cells, base stations, user equipment and mobile communication system |
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| WO2012147718A1 (en) * | 2011-04-28 | 2012-11-01 | 三菱電機株式会社 | Communication system |
| CN102821475A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | User dispatching method and device |
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