CN107437975A - A kind of MIMO modes method for handover control and device - Google Patents
A kind of MIMO modes method for handover control and device Download PDFInfo
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- CN107437975A CN107437975A CN201610352743.4A CN201610352743A CN107437975A CN 107437975 A CN107437975 A CN 107437975A CN 201610352743 A CN201610352743 A CN 201610352743A CN 107437975 A CN107437975 A CN 107437975A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The invention discloses a kind of MIMO method method for handover control and device, wherein, methods described includes：The CQI reported according to terminal determines the inner ring spectrum efficiency of at least two MIMO methods to be selected, it is scheduled finish time in terminal, update the outer shroud spectrum efficiency of described at least two MIMO methods to be selected, the MIMO method of the inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum at least two MIMO method to be selected, the MIMO method as current scheduling are selected in scheduling start time.Technical scheme provided in an embodiment of the present invention, outer shroud spectrum efficiency more new frequency spectrum is associated with the type of service of terminal and the size of portfolio, the switching time dynamically changeable of MIMO method, time delay can be reduced, improve the ageing of pattern switching, and the Packet Error Ratio of reduction mode switching instant, service stability during so as to improve pattern switching, reduce the cutting off rate in cell.
Description
Technical field
The present embodiments relate to communication technical field, more particularly to a kind of MIMO method method for handover control and device.
Background technology
Efficiency of transmission and reliability are to restrict the fast-developing bottleneck of GSM, are difficult to accomplish both under wireless environment
The stability of guarantee system, lifts efficiency of transmission to greatest extent again.Long Term Evolution (Long Term Evolution, LTE)
Technological system lifts transmission effect using multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology
Rate, improve reliability, save Radio Resource.
For descending transmission mode (Transmission Mode, TM), third generation partner program (Third
Generation Partnership Project, 3GPP) standard defines 10 kinds, (refer to 36.213 agreements as table 1 shows
Table7.1-5).TM1 belongs to common single antenna port mode, and we do not include TM1 in MIMO mechanism herein, and remaining 8
Kind transmission mode can be attributed to 3 classes：Transmitting diversity (TM2), spatial reuse (TM3, TM4, TM5, TM6), wave beam forming (TM7,
TM8, TM9), only use the effect that can be only achieved lifting system performance in specific scene for every kind of transmission mode.
The LTE terminal downlink transfer pattern of table 1
The mobility of user terminal (User Equipment, UE), the uncertainty in geographical position all can in wireless environment
UE channel conditions are made quickly to change, to adapt to this quick change base station (eNodeB) must just control switching UE biography in real time
Defeated pattern.In the prior art, the method that MIMO method switches in solution pattern is broadly divided into two kinds.The first is that base station uses
The mode of timer attempts MIMO method to be scheduled, and this method does not consider that UE measurement results are directly attempted to dispatch, is attempting rank
The reliability of section can not be protected, and ageing poor.It is for second the quality of wireless channel situation that base station reports UE
As the foundation of switching MIMO method, switching instant use Timer Controlling, this method constantly carried out in window statistics with
Judge, it is less efficient, it is ageing poor.
The content of the invention
The present invention provides a kind of MIMO method method for handover control and device, to reduce the mistake bag of transmission mode switching instant
Rate, and improve the ageing of pattern switching, service stability during so as to improve pattern switching, reduces the cutting off rate in cell.
In a first aspect, the embodiments of the invention provide a kind of MIMO method method for handover control, including：
The CQI reported according to terminal determines the inner ring spectrum efficiency of at least two MIMO methods to be selected；
It is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected；
The inner ring spectrum efficiency and outer shroud frequency spectrum at least two MIMO method to be selected are selected in scheduling start time
The maximum MIMO method of efficiency sum, the MIMO method as current scheduling.
Second aspect, the embodiment of the present invention additionally provide a kind of MIMO method switching control, including：
Inner ring spectrum efficiency determining unit, the CQI for being reported according to terminal determine at least two MIMO methods to be selected
Inner ring spectrum efficiency；
First outer shroud spectrum efficiency updating block, for being scheduled finish time in terminal, renewal described at least two is treated
Select the outer shroud spectrum efficiency of MIMO method；
MIMO method selecting unit, for being selected in scheduling start time at least two MIMO method to be selected
The MIMO method of ring spectrum efficiency and outer shroud spectrum efficiency sum maximum, the MIMO method as current scheduling.
The present invention determines the inner ring spectrum efficiency of at least two MIMO methods to be selected by the CQI reported according to terminal,
Terminal is scheduled finish time, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected, in scheduling start time
The MIMO method of the inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum in described at least two MIMO methods to be selected is selected,
MIMO method as current scheduling.Due to being to update the spectrum efficiency of MIMO method to be selected in terminal scheduling finish time, eventually
The type of service at end and the size of portfolio are related to the frequent degree that terminal is scheduled, i.e., by outer shroud spectrum efficiency more new frequency spectrum
Associated with the type of service of terminal and the size of portfolio, the switching time dynamically changeable of MIMO method；At the finishing scheduling moment
The spectrum efficiency of MIMO method to be selected is updated, the switching of MIMO method is carried out in scheduling start time, switching time is short, response speed
Degree is fast.Time delay can be reduced, the ageing of pattern switching, and the Packet Error Ratio of reduction mode switching instant are improved, so as to improve mould
Service stability when formula switches, reduce the cutting off rate in cell.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for the MIMO method method for handover control that the embodiment of the present invention one provides；
Fig. 2 is the schematic flow sheet for the MIMO method method for handover control that the embodiment of the present invention two provides；
Fig. 3 is the schematic flow sheet that the inner ring spectrum efficiency that the embodiment of the present invention three provides determines；
Fig. 4 a are the schematic flow sheets for the MIMO method method for handover control that the embodiment of the present invention four provides；
Fig. 4 b are the schematic flow sheets of MIMO method method for handover control in the pattern of the offer of the embodiment of the present invention four；
Fig. 5 is the schematic flow sheet for the MIMO method method for handover control that the embodiment of the present invention five provides；
Fig. 6 is the schematic flow sheet for the MIMO method method for handover control that the embodiment of the present invention six provides；
Fig. 7 is the structural representation for the MIMO method switching control that the embodiment of the present invention seven provides.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Fig. 1 is a kind of schematic flow sheet for MIMO method method for handover control that the embodiment of the present invention one provides.This implementation
Example is applicable to the situation in scheduling instance switching transmission mode, and this method can be held by MIMO method switching control
OK, described device is configured in base station.The MIMO method method for handover control that the present embodiment provides specifically includes：
S110, the CQI reported according to terminal determine the inner ring spectrum efficiency of at least two MIMO methods to be selected.
Terminal can report CQI, or the request aperiodicity initiated according to network side according to the configuration cycle property of network
CQI is reported, can specifically be configured and determined by the wireless heterogeneous networks (Radio Resource Control, RRC) that base station issues.Connect
, can be to be selected according to the inner ring spectrum efficiency of estimated at least two MIMO methods to be selected of CQI after receiving the CQI that terminal reports
MIMO method is the MIMO method that scheduling may be selected in system.Referring to table 1, there are multiple transmission modes in existing communication standard, it is every kind of
Transmission mode includes multiple MIMO methods again, and MIMO method to be selected can be the MIMO method of different transmission mode, or
MIMO method under single transmission mode.
S120, it is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected.
Such as at the present sub-frame finishing scheduling moment, judge whether terminal is scheduled.If terminal is scheduled, update at least
The outer shroud spectrum efficiency of two kinds of MIMO methods to be selected., can be according to the inner ring frequency spectrum after renewal in next subframe scheduling start time
The MIMO method of efficiency and outer shroud spectrum efficiency selection scheduling.
S130, the inner ring spectrum efficiency in scheduling start time selection at least two MIMO method to be selected and outer shroud
The maximum MIMO method of spectrum efficiency sum, the MIMO method as current scheduling.
In the present embodiment, the spectrum efficiency of MIMO method is equal to inner ring spectrum efficiency and outer shroud spectrum efficiency sum.I.e.
MIMO method of the maximum MIMO method of spectrum efficiency as current scheduling is selected in MIMO method to be selected.Such as opened in scheduling
Begin to dispatch the MIMO method currently selected in transmission mode field of the moment in RRC antenna configuration informations.
In the present embodiment, the adjustment determination of inner ring spectrum efficiency reports pattern related to terminal CQI, inner ring spectrum efficiency
Adjustment is relatively fixed.And the time adjustment of outer shroud spectrum efficiency at the time of terminal is scheduled, i.e. the renewal of spectrum efficiency also exists
Terminal is scheduled the moment.Inner ring spectrum efficiency and outer shroud spectrum efficiency were determined according to last time in present terminal start time that is scheduled
An optimal MIMO method is selected as current transmission means.Due to being to update MIMO to be selected in terminal scheduling finish time
The spectrum efficiency of mode, the type of service of terminal and the size of portfolio are related to the frequent degree that terminal is scheduled, will be outer
Ring spectrum efficiency more new frequency spectrum associates with the type of service of terminal and the size of portfolio, and the switching time dynamic of MIMO method can
Become, the spectrum efficiency of MIMO method to be selected updated at the finishing scheduling moment, the switching of MIMO method is carried out in scheduling start time,
Switching time is short, fast response time.Time delay can be reduced, improves the ageing of pattern switching, and reduction mode switching instant
Packet Error Ratio, service stability during so as to improve pattern switching, reduce the cutting off rate in cell.
Embodiment two
Fig. 2 is a kind of schematic flow sheet for MIMO method method for handover control that the embodiment of the present invention two provides.This implementation
Example is optimized on the basis of above-described embodiment one, the MIMO method switching control side provided referring to Fig. 2, the present embodiment
Method specifically includes：
S210, the CQI reported according to terminal and the mapping relations of CQI and spectrum efficiency determine currently used MIMO side
The inner ring spectrum efficiency of formula.
Wherein, the mapping relations of CQI and spectrum efficiency refer to table 2 below.The mapping relations of CQI and spectrum efficiency can also
Obtained by emulation., can be according to the CQI in CQI value and following table and spectrum efficiency after the CQI that terminal reports is received
Mapping relations determine the inner ring spectrum efficiency of MIMO method in current transmission mode.
The CQI of table 2 and spectrum efficiency SE mapping relations
It is S220, true according to the inner ring spectrum efficiency of the currently used MIMO method and default spectrum efficiency conversion rule
The inner ring spectrum efficiency of fixed at least two MIMO method to be selected.
Wherein, the default spectrum efficiency conversion rule, including：
In the transmission mode for reporting order instruction (Rank Indicator, RI), the frequency spectrum of the more MIMO method of the number of plies
Efficiency is converted to the spectrum efficiency of the less MIMO method of the number of plies, the frequency of the less MIMO method of the number of plies plus the first given threshold
Spectrum efficiency subtracts the second given threshold and converted to the spectrum efficiency of the more MIMO method of the number of plies；
Exemplary, the currently used MIMO method of system is transmission means A, and the RI numbers of plies reported are 2, the inner ring of mapping
Spectrum efficiency for S1；It is A that S1 is obtained into the transmission means that the number of plies is 1 plus the first given threshold (generally being obtained by emulation)
Inner ring spectrum efficiency.S1 is subtracted into the second given threshold (generally being obtained by emulation) and obtains the transmission means A's that the number of plies is 4
Inner ring spectrum efficiency.
The spectrum efficiency of transmitting diversity mode subtracts the 3rd given threshold and converted to the spectrum efficiency of non-transmission diversity mode,
The spectrum efficiency of non-transmission diversity mode is converted to the spectrum efficiency of transmitting diversity mode plus the 4th given threshold.
Exemplary, the currently used MIMO method of system is sends diversity mode, and corresponding spectrum efficiency is S2, by S2
Subtract the 3rd given threshold and obtain the spectrum efficiency of non-sent diversity mode (such as main transmission mode in transmission mode TM3).
S230, it is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected.
Further, below equation can be used to calculate the outer shroud spectrum efficiency of at least two MIMO methods to be selected of renewal：
Bler=ACK/ (ACK+NACK)；
DeltaSe_tmp=(BLER_Target-bler) × STEP/ (1-BLER_Target)；
DeltaSe=DeltaSe+DeltaSe_tmp；
Wherein, ACK be report hybrid automatic repeat-request (Hybrid Automatic Repeat Request,
HARQ affirmative acknowledgment in), NACK are the confirmation for negating in the HARQ reported.
BLER_Target is desired value, and STEP is adjusting step, and DeltaSe is that the outer shroud frequency spectrum of MIMO method to be selected is imitated
Rate.BLER_Target and STEP is usually empirical value, can be adjusted and set according to the use environment of different system and system
Put.
S240, the inner ring spectrum efficiency in scheduling start time selection at least two MIMO method to be selected and outer shroud
The maximum MIMO method of spectrum efficiency sum, the MIMO method as current scheduling.
The technical scheme that the present embodiment provides, the CQI and CQI and the mapping relations of spectrum efficiency reported according to terminal are true
The inner ring spectrum efficiency of fixed currently used MIMO method.According to the inner ring spectrum efficiency of the currently used MIMO method and
Default spectrum efficiency conversion rule determines the inner ring spectrum efficiency of described at least two MIMO methods to be selected.Can be relatively accurately
Estimate the inner ring spectrum efficiency of MIMO method to be selected.
Embodiment three
Fig. 3 is the schematic flow sheet that a kind of inner ring spectrum efficiency that the embodiment of the present invention three provides determines.In actual transmissions
In scheduling process, terminal just reports RI values only under transmission mode TM3, TM4, TM8, TM9 and TM10, MIMO method to be selected
The determination process of inner ring spectrum efficiency is specifically as follows below scheme：
S301, beginning.
S302, base station receive the CQI and RI that terminal reports.
Whether S303, current transmission mode are TM3, TM4, TM8, TM9 or TM10；If going to S304, go to if not
305。
S304, the inner ring frequency spectrum effect according to the MIMO method in the newest CQI and RI values mapping current transmission mode reported
Rate, other MIMO methods do conversion processing.
Conversion processing procedure refers to the description in above-described embodiment.
S305, MIMO method in the CQI mapping current transmission modes reported according to newest inner ring spectrum efficiency, other
MIMO method does conversion processing.
S306, end.
Example IV
Fig. 4 a are a kind of schematic flow sheets for MIMO method method for handover control that the embodiment of the present invention four provides.This implementation
Example is optimized on the basis of above-described embodiment one, the MIMO method switching control provided referring to Fig. 4 a, the present embodiment
Method specifically includes：
S410, the CQI reported according to terminal determine the inner ring spectrum efficiency of at least two MIMO methods to be selected.
S420, it is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected.
If the MIMO method of S430, last scheduled is transmitting diversity mode, inner ring spectrum efficiency and outer shroud frequency spectrum effect are selected
MIMO method of the maximum MIMO method of rate sum as current scheduling；
If the MIMO method of last scheduled (the preceding of current scheduling moment is once dispatched) is diversity mode, current scheduling
MIMO method can be other transmission modes in MIMO method, you can switch between the pattern of different transmission mode.
If the MIMO method of S440, last scheduled is non-transmission diversity mode, the non-sent diversity mode is judged
Whether inner ring spectrum efficiency and outer shroud spectrum efficiency sum are more than the inner ring spectrum efficiency and outer shroud frequency spectrum effect of transmitting diversity mode
Rate sum.
S450, if so, then selecting MIMO method of the non-sent diversity mode as current scheduling.
S460, if it is not, then selection send MIMO method of the diversity mode as current scheduling.
It should be noted that if the MIMO method of last scheduled is non-transmission diversity mode, in order in mode handover procedure
System it is stable, can only be switched in transmission mode during current scheduling.Intra-mode handover process flow as shown in Figure 4 b, has
Body includes following flow：
S401, beginning.
S402, obtain the spectrum efficiency SE_sfbc for launching diversity mode under current transmission mode.
S403, the maximum spectral efficiency SE_max for obtaining each MIMO method of non-transmission diversity under current transmission mode.
Whether S404, SE_sfbc are more than or equal to SE_max, if then going to S405, if otherwise going to S406.
S405, this scheduling MIMO method are transmitting diversity mode.
S406, this scheduling MIMO method are MIMO method corresponding to SE_max.
S407, end.
The technical scheme that the present embodiment provides, first choice determine whether the MIMO method of last scheduled is transmitting diversity mode,
If so, then switch between prioritized mode, if it is not, then being switched over when being dispatched at this in pattern.It may insure pattern
System in handoff procedure is stable, reduces the Packet Error Ratio of transmission mode switching instant, and business during so as to improve pattern switching is steady
It is qualitative, reduce the cutting off rate in cell.
Embodiment five
Fig. 5 is a kind of schematic flow sheet for MIMO method method for handover control that the embodiment of the present invention five provides.This implementation
Example is optimized on the basis of above-described embodiment one, the MIMO method switching control side provided referring to Fig. 5, the present embodiment
Method specifically includes：
S510, the CQI reported according to terminal determine the inner ring spectrum efficiency of at least two MIMO methods to be selected.
S520, it is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected.
S530, the inner ring spectrum efficiency in scheduling start time selection at least two MIMO method to be selected and outer shroud
The maximum MIMO method of spectrum efficiency sum, the MIMO method as current scheduling.
The value of the spectrum efficiency fallback counter for the MIMO method that S540, removing are dispatched.
Each MIMO method to be selected is all corresponding with respective spectrum efficiency fallback counter, initial value zero.Dispatching
Start time, after a MIMO method is selected from MIMO method to be selected as the MIMO method of current scheduling, it will obtain
The value of the spectrum efficiency fallback counter of the MIMO method of scheduling is reset.
The outer shroud spectrum efficiency for the MIMO method not being scheduled in S550, renewal at least two MIMO method to be selected.
In scheduling start time, MIMO method of the MIMO method as current scheduling is selected from MIMO method to be selected
Afterwards, the spectrum efficiency of the MIMO method that current time is not dispatched in MIMO method to be selected is updated.
Further, the outer shroud frequency spectrum effect of not scheduled MIMO method at least two MIMO method to be selected is updated
The concrete mode of rate is as follows：
The value of the spectrum efficiency fallback counter of not scheduled MIMO method is added 1；
It is more than or equal to spectrum efficiency rollback in the value of the spectrum efficiency fallback counter of not scheduled MIMO method to count
During device thresholding, it is determined that the outer shroud spectrum efficiency of the not scheduled MIMO method is greater than also being less than spectrum efficiency rollback mesh
Scale value；
Wherein, spectrum efficiency fallback counter thresholding can configure, the spectrum efficiency fallback counter door of all MIMO methods
Limit identical.
When the outer shroud spectrum efficiency of the not scheduled MIMO method is more than the spectrum efficiency rollback desired value, press
According to the outer shroud spectrum efficiency for the MIMO method not being scheduled described in below equation renewal：
DeltaSe1=DeltaSe1-DeltaSe_step
When the outer shroud spectrum efficiency of not scheduled MIMO method is less than the spectrum efficiency rollback desired value, according to
The outer shroud spectrum efficiency for the MIMO method not being scheduled described in lower formula renewal：
DeltaSe1=DeltaSe1+DeltaSe_step
Wherein, the spectrum efficiency rollback desired value of all MIMO methods is identical, and can configure.DeltaSe1 is not adjusted
The outer shroud spectrum efficiency of the MIMO method of degree, is initially zero.DeltaSe_step is spectrum efficiency rollback step-length, DeltaSe_
Step is preset value, usually empirical value, and the DeltaSe_step of the use of all MIMO methods is identical.
The technical scheme that the present embodiment provides, uses outer shroud frequency spectrum in the outer shroud spectrum efficiency renewal process of MIMO method
Efficiency counter, when the value of counter meets to impose a condition, update the outer shroud spectrum efficiency of MIMO method.Make MIMO method
The dynamically changeable that switching instant becomes, and increase the probability that not scheduled MIMO method is attempted scheduling, make system optimal
Transmission mode under work.
Embodiment six
Fig. 6 is a kind of schematic flow sheet for MIMO method method for handover control that the embodiment of the present invention six provides.Referring to figure
6, this method includes following flow：
S601, beginning.
S602, present sub-frame finishing scheduling moment terminal are scheduled, transmission mode=TMi, i=2.
Whether S603, transmission mode have stepped through end；If so, go to S621.
Whether S604, current transmission mode are the transmission mode of last scheduled, if so, going to S607.
The outer shroud spectrum efficiency of each MIMO method under S605, the unscheduled pattern of renewal.
S606, i++, transmission mode=TMi, go to S603.
Each MIMO method under S607, circulation current transmission mode.
S608, current MIMO method whether be last scheduled MIMO method；If it is not, go to S613.
S609, remove spectrum efficiency fallback counter count results under the MIMO method.
S610, calculate sub-frame level bler=ACK/ (ACK+NACK).
S611, calculate outer shroud adjustment amount DeltaSe_temp=(Bler_target-bler) × step/ (1-Bler_
target)。
S612, outer shroud adjustment result DeltaSe=DeltaSe+DeltaSe_temp is calculated, go to S619.
Spectrum efficiency fallback counter under S613, the MIMO method adds 1.
Whether S614, the spectrum efficiency fallback counter of the MIMO method are more than or equal to spectrum efficiency fallback counter door
Limit；If it is not, go to S619.
Whether S615, the outer shroud spectrum efficiency of the MIMO method are equal to spectrum efficiency rollback desired value, if so, going to
S619。
Whether S616, the MIMO method outer shroud spectrum efficiency are more than spectrum efficiency rollback desired value, if so, going to S618.
S617, outer shroud spectrum efficiency Delta=Delta+DeltaSe_step under the MIMO method is updated, gone to
S619。
S618, update outer shroud spectrum efficiency Delta=Delta-DeltaSe_step under the MIMO method.
Whether each MIMO method of S619, current transmission mode has stepped through end；If it is not, go to S607.
S620, i++, transmission mode=TMi, go to S603.
S621, end.
It should be noted that if not redirecting execution after current procedures execution terminates, order performs.
Embodiment seven
Fig. 7 is a kind of structural representation for MIMO method switching control that the embodiment of the present invention seven provides.Referring to figure
7, described device includes：
Inner ring spectrum efficiency determining unit 710, the CQI for being reported according to terminal determine at least two MIMO methods to be selected
Inner ring spectrum efficiency；
First outer shroud spectrum efficiency updating block 720, for being scheduled finish time in terminal, renewal described at least two
The outer shroud spectrum efficiency of MIMO method to be selected；
MIMO method selecting unit 730, for being selected in scheduling start time at least two MIMO method to be selected
Inner ring spectrum efficiency and the maximum MIMO method of outer shroud spectrum efficiency sum, the MIMO method as current scheduling.
Further, the inner ring spectrum efficiency determining unit 710 includes：
Reference spectral efficiency determination subelement 711, for reflecting for the CQI and CQI that are reported according to terminal and spectrum efficiency
The relation of penetrating determines the inner ring spectrum efficiency of currently used MIMO method；
Inner ring spectrum efficiency determination subelement 712, for being imitated according to the inner ring frequency spectrum of the currently used MIMO method
Rate and default spectrum efficiency conversion rule determine the inner ring spectrum efficiency of described at least two MIMO methods to be selected.
Wherein, the default spectrum efficiency conversion rule includes：
In the transmission mode for reporting order instruction RI, the spectrum efficiency of the more MIMO method of the number of plies is plus the first setting threshold
Value is converted to the spectrum efficiency of the less MIMO method of the number of plies, the spectrum efficiency of the less MIMO method of the number of plies and subtracts the second setting
Threshold value is converted to the spectrum efficiency of the more MIMO method of the number of plies；
The spectrum efficiency of transmitting diversity mode subtracts the 3rd given threshold and converted to the spectrum efficiency of non-transmission diversity mode,
The spectrum efficiency of non-transmission diversity mode is converted to the spectrum efficiency of transmitting diversity mode plus the 4th given threshold.
Further, the first outer shroud spectrum efficiency updating block 720 is used for：
The outer shroud spectrum efficiency of at least two MIMO methods to be selected of renewal is calculated using below equation：
Bler=ACK/ (ACK+NACK)；
DeltaSe_tmp=(BLER_Target-bler) × STEP/ (1-BLER_Target)；
DeltaSe=DeltaSe+DeltaSe_tmp；
Wherein, ACK is affirmative acknowledgment in the HARQ reported, and NACK is the confirmation for negating in the HARQ reported, BLER_
Target is desired value, and STEP is adjusting step, and DeltaSe is the outer shroud spectrum efficiency of MIMO method to be selected.
Further, the MIMO method selecting unit 730 includes：
First MIMO method selects subelement 731, if the MIMO method for last scheduled is transmitting diversity mode, selection
MIMO method of the MIMO method of inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum as current scheduling；
Spectrum efficiency comparing subunit 732, if the MIMO method for last scheduled is non-transmission diversity mode, judge
Whether the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of the non-sent diversity mode are more than the inner ring of transmitting diversity mode
Spectrum efficiency and outer shroud spectrum efficiency sum；
Second MIMO method selects subelement 733, if inner ring spectrum efficiency and the outer shroud frequency for non-sent diversity mode
Spectrum efficiency sum is more than the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of transmitting diversity mode, then selects described non-sent point
MIMO method of the mode set as current scheduling；
3rd MIMO method selects subelement 734, if inner ring spectrum efficiency and the outer shroud frequency for non-sent diversity mode
Spectrum efficiency sum is not more than the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of transmitting diversity mode, then selection sends diversity side
MIMO method of the formula as current scheduling；
Further, described device also includes：
Counter initialization unit 740, at least two MIMO method to be selected is selected in scheduling start time
Inner ring spectrum efficiency and the maximum MIMO method of outer shroud spectrum efficiency sum, after the MIMO method of current scheduling, clearly
Except the value of the spectrum efficiency fallback counter for the MIMO method dispatched.
Second outer shroud spectrum efficiency updating block 750, is not adjusted for updating in described at least two MIMO methods to be selected
The outer shroud spectrum efficiency of the MIMO method of degree.
Further, the second outer shroud spectrum efficiency updating block 750 includes：
Counter updates subelement 751, the value for the spectrum efficiency fallback counter of MIMO method that will be not scheduled
Add 1；
Outer shroud spectrum efficiency comparing subunit 752, counted for being retracted in the spectrum efficiency of not scheduled MIMO method
When the value of device is more than or equal to spectrum efficiency fallback counter thresholding, it is determined that the outer shroud frequency spectrum effect of the not scheduled MIMO method
Rate is greater than also being less than spectrum efficiency rollback desired value；
First outer shroud spectrum efficiency updates subelement 753, for the outer shroud frequency spectrum in the not scheduled MIMO method
When efficiency is more than the spectrum efficiency rollback desired value, according to the outer shroud for the MIMO method not being scheduled described in below equation renewal
Spectrum efficiency：
DeltaSe1=DeltaSe1-DeltaSe_step
Second outer shroud spectrum efficiency updates subelement 754, for the outer shroud spectrum efficiency in not scheduled MIMO method
During less than the spectrum efficiency rollback desired value, according to the outer shroud frequency spectrum for the MIMO method not being scheduled described in below equation renewal
Efficiency：
DeltaSe1=DeltaSe1+DeltaSe_step
Wherein, DeltaSe1 is the outer shroud spectrum efficiency of not scheduled MIMO method, and DeltaSe_step is imitated for frequency spectrum
Rate rollback step-length.
Said apparatus can perform the method that any embodiment of the present invention is provided, and possess the corresponding functional module of execution method
And beneficial effect.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (14)
- A kind of 1. MIMO method method for handover control, it is characterised in that including：The channel quality indicator (CQI) reported according to terminal determines the inner ring frequency of at least two multiple-input and multiple-output MIMO methods to be selected Spectrum efficiency；It is scheduled finish time in terminal, updates the outer shroud spectrum efficiency of at least two MIMO method to be selected；Inner ring spectrum efficiency and outer shroud spectrum efficiency in selecting at least two MIMO method to be selected in scheduling start time The maximum MIMO method of sum, the MIMO method as current scheduling.
- 2. according to the method for claim 1, it is characterised in that the CQI reported according to terminal determines that at least two is to be selected The inner ring spectrum efficiency of MIMO method, including：The CQI and CQI and the mapping relations of spectrum efficiency that are reported according to terminal determine the inner ring of currently used MIMO method Spectrum efficiency；According to determining the inner ring spectrum efficiency of the currently used MIMO method and default spectrum efficiency conversion rule extremely The inner ring spectrum efficiency of few two kinds of MIMO methods to be selected.
- 3. according to the method for claim 2, it is characterised in that the default spectrum efficiency conversion rule, including：In the transmission mode for reporting order instruction RI, the spectrum efficiency of the more MIMO method of the number of plies is rolled over plus the first given threshold Calculate to the spectrum efficiency of the less MIMO method of the number of plies, the spectrum efficiency of the less MIMO method of the number of plies and subtract the second given threshold Convert to the spectrum efficiency of the more MIMO method of the number of plies；The spectrum efficiency of transmitting diversity mode subtracts the 3rd given threshold and converted to the spectrum efficiency of non-transmission diversity mode, non-hair The spectrum efficiency for penetrating diversity mode is converted to the spectrum efficiency of transmitting diversity mode plus the 4th given threshold.
- 4. according to the method for claim 1, it is characterised in that the outer shroud frequency of renewal at least two MIMO method to be selected Spectrum efficiency, including：The outer shroud spectrum efficiency of at least two MIMO methods to be selected of renewal is calculated using below equation：Bler=ACK/ (ACK+NACK)；DeltaSe_tmp=(BLER_Target-bler) × STEP/ (1-BLER_Target)；DeltaSe=DeltaSe+DeltaSe_tmp；Wherein, ACK is affirmative acknowledgment in the HARQ reported, and NACK is the confirmation for negating in the HARQ reported, BLER_Target For desired value, STEP is adjusting step, and DeltaSe is the outer shroud spectrum efficiency of MIMO method to be selected.
- 5. according to the method for claim 1, it is characterised in that to be selected in scheduling start time selection described at least two The MIMO method of inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum in MIMO method, the MIMO side as current scheduling Formula, including：If the MIMO method of last scheduled is transmitting diversity mode, select inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum MIMO method of the MIMO method as current scheduling；If the MIMO method of last scheduled is non-transmission diversity mode, the inner ring frequency spectrum effect of the non-sent diversity mode is judged Whether rate and outer shroud spectrum efficiency sum are more than the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of transmitting diversity mode；If so, then select the MIMO method that the non-sent diversity mode is dispatched as the current scheduling moment；If it is not, then selection sends MIMO method of the diversity mode as current scheduling.
- 6. according to the method for claim 1, it is characterised in that to be selected in scheduling start time selection described at least two Inner ring spectrum efficiency and outer shroud spectrum efficiency sum maximum MIMO method in MIMO method, the MIMO method as current scheduling Afterwards, in addition to：Remove the value of the spectrum efficiency fallback counter for the MIMO method dispatched；Update the outer shroud spectrum efficiency for the MIMO method not being scheduled in described at least two MIMO methods to be selected.
- 7. according to the method for claim 6, it is characterised in that do not adjusted in renewal at least two MIMO method to be selected The outer shroud spectrum efficiency of the MIMO method of degree, including：The value of the spectrum efficiency fallback counter of not scheduled MIMO method is added 1；It is more than or equal to spectrum efficiency fallback counter door in the value of the spectrum efficiency fallback counter of not scheduled MIMO method In limited time, it is determined that the outer shroud spectrum efficiency of the not scheduled MIMO method is greater than also being less than spectrum efficiency rollback target Value；When the outer shroud spectrum efficiency of the not scheduled MIMO method is more than the spectrum efficiency rollback desired value, according to The outer shroud spectrum efficiency for the MIMO method not being scheduled described in lower formula renewal：DeltaSe1=DeltaSe1-DeltaSe_stepWhen the outer shroud spectrum efficiency of not scheduled MIMO method is less than the spectrum efficiency rollback desired value, according to following public affairs The outer shroud spectrum efficiency for the MIMO method not being scheduled described in formula renewal：DeltaSe1=DeltaSe1+DeltaSe_stepWherein, DeltaSe1 is the outer shroud spectrum efficiency of not scheduled MIMO method, and DeltaSe_step returns for spectrum efficiency Regress length.
- A kind of 8. MIMO method switching control, it is characterised in that including：Inner ring spectrum efficiency determining unit, the CQI for being reported according to terminal determine the inner ring of at least two MIMO methods to be selected Spectrum efficiency；First outer shroud spectrum efficiency updating block, for being scheduled finish time in terminal, renewal described at least two is to be selected The outer shroud spectrum efficiency of MIMO method；MIMO method selecting unit, for selecting the inner ring frequency at least two MIMO method to be selected in scheduling start time The MIMO method of spectrum efficiency and outer shroud spectrum efficiency sum maximum, the MIMO method as current scheduling.
- 9. device according to claim 8, it is characterised in that the inner ring spectrum efficiency determining unit includes：Reference spectral efficiency determination subelement, the CQI and CQI and the mapping relations of spectrum efficiency for being reported according to terminal are true The inner ring spectrum efficiency of fixed currently used MIMO method；Inner ring spectrum efficiency determination subelement, for the inner ring spectrum efficiency according to the currently used MIMO method and preset Spectrum efficiency conversion rule determines the inner ring spectrum efficiency of described at least two MIMO methods to be selected.
- 10. device according to claim 9, it is characterised in that the default spectrum efficiency conversion rule, including：In the transmission mode for reporting order instruction RI, the spectrum efficiency of the more MIMO method of the number of plies is rolled over plus the first given threshold Calculate to the spectrum efficiency of the less MIMO method of the number of plies, the spectrum efficiency of the less MIMO method of the number of plies and subtract the second given threshold Convert to the spectrum efficiency of the more MIMO method of the number of plies；The spectrum efficiency of transmitting diversity mode subtracts the 3rd given threshold and converted to the spectrum efficiency of non-transmission diversity mode, non-hair The spectrum efficiency for penetrating diversity mode is converted to the spectrum efficiency of transmitting diversity mode plus the 4th given threshold.
- 11. device according to claim 8, it is characterised in that the first outer shroud spectrum efficiency updating block is used for：The outer shroud spectrum efficiency of at least two MIMO methods to be selected of renewal is calculated using below equation：Bler=ACK/ (ACK+NACK)；DeltaSe_tmp=(BLER_Target-bler) × STEP/ (1-BLER_Target)；DeltaSe=DeltaSe+DeltaSe_tmp；Wherein, ACK is affirmative acknowledgment in the HARQ reported, and NACK is the confirmation for negating in the HARQ reported, BLER_Target For desired value, STEP is adjusting step, and DeltaSe is the outer shroud spectrum efficiency of MIMO method to be selected.
- 12. device according to claim 8, it is characterised in that the MIMO method selecting unit includes：First MIMO method selects subelement, if the MIMO method for last scheduled is transmitting diversity mode, selects inner ring frequency MIMO method of the MIMO method of spectrum efficiency and outer shroud spectrum efficiency sum maximum as current scheduling；Spectrum efficiency comparing subunit, if the MIMO method for last scheduled is non-transmission diversity mode, judge described non- Send the inner ring spectrum efficiency of diversity mode and whether outer shroud spectrum efficiency sum is more than the inner ring frequency spectrum effect of transmitting diversity mode Rate and outer shroud spectrum efficiency sum；Second MIMO method selects subelement, if the inner ring spectrum efficiency and outer shroud frequency spectrum for the non-sent diversity mode are imitated Rate sum is more than the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of transmitting diversity mode, then selects the non-sent diversity side MIMO method of the formula as current scheduling；3rd MIMO method selects subelement, if the inner ring spectrum efficiency and outer shroud frequency spectrum for the non-sent diversity mode are imitated Rate sum is not more than the inner ring spectrum efficiency and outer shroud spectrum efficiency sum of transmitting diversity mode, then selection sends diversity mode and made For the MIMO method of current scheduling.
- 13. device according to claim 8, it is characterised in that also include：Counter initialization unit, for the inner ring frequency spectrum in selecting at least two MIMO method to be selected in scheduling start time The MIMO method of efficiency and outer shroud spectrum efficiency sum maximum, after the MIMO method of current scheduling, removing is dispatched MIMO method spectrum efficiency fallback counter value；Second outer shroud spectrum efficiency updating block, for updating the MIMO not being scheduled in described at least two MIMO methods to be selected The outer shroud spectrum efficiency of mode.
- 14. device according to claim 13, it is characterised in that the second outer shroud spectrum efficiency updating block includes：Counter updates subelement, for the value of the spectrum efficiency fallback counter of not scheduled MIMO method to be added into 1；Outer shroud spectrum efficiency comparing subunit, the value for the spectrum efficiency fallback counter in not scheduled MIMO method are big When equal to spectrum efficiency fallback counter thresholding, it is determined that the outer shroud spectrum efficiency of the not scheduled MIMO method is greater than Also it is less than spectrum efficiency rollback desired value；First outer shroud spectrum efficiency updates subelement, for being more than in the outer shroud spectrum efficiency of the not scheduled MIMO method During the spectrum efficiency rollback desired value, according to the outer shroud frequency spectrum of scheduled MIMO method is not imitated described in below equation renewal Rate：DeltaSe1=DeltaSe1-DeltaSe_stepSecond outer shroud spectrum efficiency updates subelement, described for being less than in the outer shroud spectrum efficiency of not scheduled MIMO method During spectrum efficiency rollback desired value, according to the outer shroud spectrum efficiency for the MIMO method not being scheduled described in below equation renewal：DeltaSe1=DeltaSe1+DeltaSe_stepWherein, DeltaSe1 is the outer shroud spectrum efficiency of not scheduled MIMO method, and DeltaSe_step returns for spectrum efficiency Regress length.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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