CN104185206B - A kind of switching method and device of transmission mode - Google Patents
A kind of switching method and device of transmission mode Download PDFInfo
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- CN104185206B CN104185206B CN201310196213.1A CN201310196213A CN104185206B CN 104185206 B CN104185206 B CN 104185206B CN 201310196213 A CN201310196213 A CN 201310196213A CN 104185206 B CN104185206 B CN 104185206B
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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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
Abstract
The invention discloses a kind of switching methods of transmission mode, and the weighting function expression formula of pattern switching is used for transmission including determining；Information and scheduling information are reported according to the metrical information of base station side and terminal side, estimates the value of each variable in the weighting function expression formula under each transmission mode；The value for calculating the weighting function expression formula under each transmission mode determines that maximum value or the corresponding transmission mode of minimum value are changeable transmission mode in the value of the weighting function expression formula, and carries out transmission mode switching.The present invention also discloses a kind of switching devices of transmission mode can accurately switch and improve the handling capacity of system using the present invention.
Description
Technical field
The present invention relates in long term evolution (Long Term Evolution, LTE) system more particularly to a kind of transmission mould
The switching method and device of formula.
Background technique
In order to match different application scenarios, a variety of transmission modes are coexisted among LTE system, and how according to applied field
The characteristics of scape, the optimal transmission mode of adaptive selection become the key for improving system performance.In the prior art, it generally adopts
The switching of transmission mode is carried out with information such as speed, channel relevancy, signal-to-noise ratio, spectrum efficiencies, and the acquisition of these information is logical
Often estimated by base station side or the modes such as terminal reports are realized.
Wherein, for the mode of base station side estimation, the problems of be that some information in base station side are to be unable to estimate
, such as: for beam shaping (Beamforming, BF) technology, agreement regulation uses client DRS (Dedicated Reference Signal) (UE-
Specific Reference Signals, UE-SRS) carry out channel estimation；And for transmitting diversity (Space
Frequency Block Code, SFBC) technology, agreement regulation is using cell specific reference signal (Cell-specific
Reference Signals, CRS) channel estimation is carried out, since the difference and terminal channel estimation method of pilot configuration may
Difference, therefore, system performance difference is that base station side can not accurately be estimated, and then just will affect the accuracy of switching.
For the mode that terminal reports, the problems of be: firstly, some information protocols are not supported to report；
Secondly, not only will affect the accuracy of switching when the information inaccuracy that terminal reports, also will cause the decline of system performance.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of switching method of transmission mode and device, Neng Gouzhun
It definitely changes, and the handling capacity of system can be improved.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The present invention provides a kind of switching methods of transmission mode, which comprises determination is used for transmission pattern switching
Weighting function expression formula；Information and scheduling information are reported according to the metrical information of base station side and terminal side, estimates each biography
Under defeated mode in the weighting function expression formula each variable value；Calculate the weighting function expression formula under each transmission mode
Value；Determine that maximum value or the corresponding transmission mode of minimum value are changeable transmission mould in the value of the weighting function expression formula
Formula, and carry out transmission mode switching.
In above scheme, the value for calculating the weighting function expression formula under each transmission mode, comprising: according to estimation
Each transmission mode under in the weighting function expression formula each variable value, divide transmission mode set；To the needs divided
The transmission mode set T of trial3It attempts to dispatch according to scheduling pattern in a scheduling window, obtain each in weighting function expression formula
The value of variable；Calculate the transmission mode set T for having obtained the required all information of transmission mode switching divided2In various biographies
The value of weighting function expression formula under defeated mode；And institute is calculated according to the value of each variable in the weighting function expression formula of acquisition
State transmission mode set T3In various transmission modes weighting function expression formula value.
In above scheme, the scheduling pattern includes: scheduling pattern one: in order or backward is successively to the transmission mode
Set T3Interior each transmission mode carries out round-robin scheduling；Scheduling pattern two: in order or backward is successively to the transmission mode
Set T3Interior each transmission mode carries out round-robin scheduling, and the number continuously dispatched in the every wheel of each transmission mode is greater than one
It is secondary；Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；Scheduling
Pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode is scheduled, even number wheel
In reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and in the every wheel of each transmission mode
The number continuously dispatched is greater than primary.
In above scheme, each variable in the weighting function expression formula includes spectrum efficiency, Block Error Rate, packet loss and right
The interference that adjacent area generates.
In above scheme, the metrical information of the base station side includes: channel-estimation information and channel measurement information；The end
The information that reports of end side includes: channel quality instruction, pre-coding matrix instruction and order instruction；The scheduling information packet of the terminal side
Include: scheduling times, the modulation of scheduling and encoding scheme and scheduling transmission mode.
In above scheme, the method also includes: maximum value or minimum value are corresponding in the value of the weighting function expression formula
Transmission mode when having multiple, determine changeable transmission mode according to random selection or permanent order.
The present invention also provides a kind of switching device of transmission mode, described device includes determination unit, estimation unit,
One computing unit and switch unit, wherein the determination unit, for determining the weighting function expression for being used for transmission pattern switching
Formula；The estimation unit, for reporting information and scheduling information according to the metrical information of base station side and terminal side, estimation is each
Under transmission mode in the weighting function expression formula each variable value；First computing unit, for calculating each transmission
The value of the weighting function expression formula under mode；The switch unit, in the value for determining the weighting function expression formula most
Big value or the corresponding transmission mode of minimum value are changeable transmission mode, and carry out transmission mode switching.
In above scheme, first computing unit includes division unit, scheduling unit and the second computing unit, wherein
The division unit is divided and is passed for the value of each variable in weighting function expression formula described under each transmission mode according to estimation
Defeated set of modes；The scheduling unit, the transmission mode set T for attempting the needs divided3In a scheduling window
Trial scheduling is carried out according to scheduling pattern, obtains the value of each variable in weighting function expression formula；Second computing unit, is used for
Calculate the transmission mode set T for having obtained the required all information of transmission mode switching divided2In under various transmission modes
Weighting function expression formula value；And the transmission mould is calculated according to the value of each variable in the weighting function expression formula of acquisition
Formula set T3In various transmission modes weighting function expression formula value.
In above scheme, the scheduling pattern includes: scheduling pattern one: in order or backward is successively to the transmission mode
Set T3Interior each transmission mode carries out round-robin scheduling；Scheduling pattern two: in order or backward is successively to the transmission mode
Set T3Interior each transmission mode carries out round-robin scheduling, and the number continuously dispatched in the every wheel of each transmission mode is greater than one
It is secondary；Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；Scheduling
Pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode is scheduled, even number wheel
In reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and in the every wheel of each transmission mode
The number continuously dispatched is greater than primary.
In above scheme, each variable in the weighting function expression formula includes spectrum efficiency, Block Error Rate, packet loss and right
The interference that adjacent area generates.
In above scheme, the metrical information of the base station side includes: channel-estimation information and channel measurement information；The end
The information that reports of end side includes: channel quality instruction, pre-coding matrix instruction and order instruction；The scheduling information packet of the terminal side
Include: scheduling times, the modulation of scheduling and encoding scheme and scheduling transmission mode.
In above scheme, described device further includes selecting unit；The selecting unit is used for the weighting function expression formula
Value in maximum value or minimum value corresponding transmission mode when having multiple, determine can be switched according to random selection or permanent order
Transmission mode.
The switching method and device of transmission mode provided by the invention first determine the weighting function for being used for transmission pattern switching
Expression formula；Metrical information and terminal side further according to base station side report information and scheduling information, estimate under each transmission mode
The value of each variable in the weighting function expression formula；The weighting function expression formula under each transmission mode is calculated later
Value determines that maximum value or the corresponding transmission mode of minimum value are changeable transmission mould in the value of the weighting function expression formula
Formula, and carry out transmission mode switching；During calculating the value of weighting function expression formula, the present invention can be transmitted by dividing
Set of modes and the mode for attempting scheduling, obtain the relevant information under various transmission modes, and then the information based on acquisition is true
Surely the changeable transmission mode and switching for carrying out transmission mode can effectively improve system in this way, may make switching more accurate
Handling capacity.
Detailed description of the invention
Fig. 1 is the implementation process schematic diagram of the switching method of transmission mode of the present invention；
Fig. 2 is the specific implementation flow schematic diagram of step 103 in Fig. 1；
Fig. 3 is the composed structure schematic diagram of the switching device of transmission mode of the present invention；
Fig. 4 is the composed structure schematic diagram of the first computing unit in Fig. 3.
Specific embodiment
The basic idea of the invention is that: the weighting function expression formula for being used for transmission pattern switching is determined, in each transmission mode
Under, determine that transmission mode corresponding to weighting function maximum value or minimum value is changeable transmission mode and carries out transmission mode
Switching.
Wherein, the information that the determination is used for transmission the weighting function expression formula of pattern switching includes spectrum efficiency
(Spectrum Effectiveness, SE), Block Error Rate (Block Error Ratio, BLER), packet loss (Harq Fail
Rate, HFR), interference (NI) etc. that adjacent area is generated；Transmission mould corresponding to the determining weighting function maximum value or minimum value
Formula is changeable transmission mode and carries out transmission mode switching and completed by base station.
The technical solution of the present invention is further elaborated in the following with reference to the drawings and specific embodiments.
Fig. 1 is the implementation process schematic diagram of the switching method of transmission mode of the present invention, as shown in Figure 1, the tool of switching method
Body process is as follows:
Step 101: determining the weighting function expression formula for being used for transmission pattern switching；
Here, the weighting function for being used for transmission pattern switching is denoted as f (SE, BLER, HFR, NI), and weighting function is available
Expression formula (1) indicates:
F (SE, BLER, HFR, NI)=W1*SE(1-BLER)+W2*ε(HFR-TH1)+W3*NI (1)
Wherein, SE indicates variable spectrum efficiency, and BLER indicates that variable Block Error Rate, HFR indicate that variable packet loss, NI indicate to become
The interference generated to adjacent area is measured, TH1 indicates the upper limit of system tolerant packet loss, W1、W2、W3The respectively power of variable spectrum efficiency
The weight coefficient that weight coefficient, the weight coefficient of variable packet loss and variable interfere adjacent area, ε (t) indicate jump function, expression
Formula isWherein t indicates stochastic variable.
About expression formula (1), those skilled in the art can determine weighting according to the characteristic of system and experience etc.
The expression formula of function.In actual operation, weighting function expression formula can be determined accordingly according to a certain parameter of system, such as:
System for laying particular emphasis on spectrum efficiency, can be by the weight coefficient W of variable spectrum efficiency SE1It is arranged to be far longer than other parameters
Weight coefficient；And the LTE system for maximizing criterion based on spectrum efficiency, it can only retain the weight of variable spectrum efficiency SE
Coefficient W1, and 0 is set by the weight coefficient of other parameters；For isolated island cell, due to without the concern for the interference to adjacent area,
Therefore the weight coefficient W for the interference NI that variable can be generated adjacent area3It is set as 0.
Step 102: information and scheduling information being reported according to the metrical information of base station side and terminal side, estimate each transmission
Under mode in the weighting function expression formula each variable value；
Here, the metrical information of the base station side includes channel-estimation information, channel measurement information etc., and terminal side reports
Information includes channel quality instruction (Channel Quality Indicator, CQI), pre-coding matrix instruction (Precoding
Matrix Indication, PMI) and order instruction (Rank Indication, RI) etc., the scheduling information of terminal side includes scheduling
Number, the modulation of scheduling and encoding scheme (Modulation Coding Scheme, MCS), the transmission mode of scheduling etc..
Specifically, T can be denoted as the set that participate in each transmission mode of switching in system, transmission mode set T be can wrap
Include but be not limited to transmitting diversity, single stream transmission modes such as beam shaping and dual-layer beam forming；In the judgement of transmission mode switching
Moment, base station report information and scheduling information according to the metrical information of base station side and terminal side, estimate under each transmission mode
In weighting function expression formula, variable spectrum efficiency SE, variable block error rate BLER, variable packet loss HFR and variable generate adjacent area
Interference NI.
Step 103: calculating the value of the weighting function expression formula under each transmission mode, determine the weighting function table
It is changeable transmission mode up to maximum value in the value of formula or the corresponding transmission mode of minimum value, and carries out transmission mode switching.
Here, the value for calculating the weighting function expression formula under each transmission mode is determined based on step 101
The upper limit TH of the system tolerant packet loss1With the weight coefficient W1、W2、W3And each transmission estimated in step 102
The value progress of each variable in weighting function expression formula under mode, wherein the weight coefficient W1、W2And W3To a certain extent
Determine the value of the weighting function expression formula, correspondingly, it needs to be determined that in the value of the weighting function expression formula maximum value or
The corresponding transmission mode of minimum value is changeable transmission mode, and carries out transmission mode switching.
Specifically, Fig. 2 is the specific implementation flow schematic diagram of step 103 in Fig. 1, as shown in Fig. 2, step 103 include with
Lower step:
Step 201: according to the value of each variable in the weighting function expression formula of estimation, the transmission mode set of switching will be participated in
T is divided into the transmission mode set T that can not become changeable transmission mode1, obtained transmission mode switching needed for whole
The transmission mode set T of information2The transmission mode set T attempted with needs3；
Wherein, the transmission mode set T that changeable transmission mode can not be become1Refer to that base station does not obtain transmission mould
All information needed for formula switching, even and if none obtained information selection theoretially optimum value；Weighting corresponding to the transmission mode
The value of function expression is generally impossible to become the set of the transmission mode of maximum value or minimum value；
The transmission mode set T for having obtained the required all information of transmission mode switching2Refer to that base station has obtained
The set of the transmission mode of all information needed for transmission mode switching；
The transmission mode set T for needing to attempt3Refer to that base station does not obtain the required all information of transmission mode switching,
But when none obtained information chooses theoretially optimum value, the value of weighting function expression formula corresponding to the transmission mode is likely to become most
The transmission mode set of big value or minimum value.
Here, step 201 is that each variable in weighting function expression formula is estimated under each transmission mode according to step 102
Value, to realize the division to the transmission mode set T for participating in switching.Since step 102 can not be quasi- to the value presence of certain variables
The situation for really estimating, being unable to estimate or reporting inaccuracy, so that the value of these variables can be considered unknown, and then by these
Transmission mode corresponding to variate-value is divided into transmission mode set T3In, therefore, the present invention is to transmission mode set T3By tasting
Examination scheduling is to obtain transmission mode set T3The interior corresponding variate-value of each transmission mode, to enable the invention to accurately switch, and
The handling capacity of system can be improved.
Wherein, described the case where can not accurately estimating includes: the channel estimation of base station side when signal-to-noise ratio (SNR) is very low
Method and measurement method failure；Described the case where being unable to estimate includes: the example since the pilot configuration of different transmission mode is different
Such as, the pilot configuration of BF and the pilot configuration difference of SFBC etc. cause the inconsistent of the two demodulation performance；It is described to report inaccuracy
The case where include when referring to that RI, PMI for reporting of terminal side, CQI information are unsatisfactory for timeliness.
By transmission mode set T1、T2And T3Definition it is found that transmission mode set T1In transmission mode can not become
Changeable transmission mode, changeable transmission mode can only be in transmission mode set T2Or T3In.
Step 202: to the transmission mode set T3It attempts to dispatch according to scheduling pattern in a scheduling window, obtains and add
The value of each variable in weight function expression formula；
Here, the scheduling window is for describing continuously to dispatch several times；System loss is brought due to attempting scheduling meeting, because
This, dispatch the setting range of window and be generally arranged according to the expense that system can allow for, generally the switching cycle of transmission mode
1%-10%.The scheduling pattern includes:
Scheduling pattern one: in order or backward is successively to the transmission mode set T3Interior each transmission mode is followed
Ring scheduling；
Scheduling pattern two: in order or backward is successively to the transmission mode set T3Interior each transmission mode is followed
Ring scheduling, and the number continuously dispatched in the every wheel of each transmission mode is greater than once；
Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode
It is scheduled, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；
Scheduling pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and each biography
The number continuously dispatched in the defeated every wheel of mode is greater than primary.
It can be by transmission mode set T3Interior various transmission modes are denoted as: T3(1), T3(2)...T3(n), correspondingly, it is described
Scheduling pattern one, two, three and four includes following scheduling pattern:
Scheduling pattern is 1.: T3(1)T3(2)...T3(n), T3(1)T3(2)...T3(n) ...；
Scheduling pattern is 2.: T3(1)...T3(1), T3(2)...T3(2) ..., T3(n)...T3(n) ...；
Scheduling pattern is 3.: T3(n)T3(n-1)...T3(1), T3(n)T3(n-1)...T3(1) ...；
Scheduling pattern is 4.: T3(n)...T3(n) ..., T3(2)...T3(2), T3(1)...T3(1), T3(n)...T3
(n) ..., T3(2)...T3(2), T3(1)...T3(1) ...；
Scheduling pattern is 5.: T3(1)T3(2)...T3(n), T3(n)T3(n-1)...T3(1) ...；
Scheduling pattern is 6.: T3(n)T3(n-1)...T3(1), T3(1)T3(2)...T3(n) ...；
Scheduling pattern is 7.: T3(1)...T3(1), T3(2)...T3(2) ..., T3(n)...T3(n), T3(n)...T3
(n) ..., T3(2)...T3(2), T3(1)...T3(1) ...；
Scheduling pattern is 8.: T3(N)...T3(n) ..., T3(2)...T3(2), T3(1)...T3(1), T3(1)...T3(1),
T3(2)...T3(2) ..., T3(n)...T3(n) ...；
Above-mentioned scheduling pattern those skilled in the art can reasonably be changed according to performance of system etc..In general,
Base station is in a scheduling window, according to above-mentioned one or more of scheduling patterns to transmission mode set T3Interior various transmission moulds
Formula carries out trial scheduling；Base station is according to trial scheduling as a result, to obtain the value of each variable in weighting function expression formula.
Step 203: calculating the transmission mode set T2In weighting function expression formula under various transmission modes value；And
According to the value of each variable in the weighting function expression formula of acquisition, the transmission mode set T is calculated3In various transmission modes
The weighting function expression formula value；
Step 204: determine in the value of the weighting function expression formula maximum value or the corresponding transmission mode of minimum value be can
The transmission mode of switching, and carry out transmission mode switching.
Further, if the corresponding maximum transmission mode of the value of weighting function expression formula have it is multiple, according to random choosing
Select or determine in a fixed order changeable transmission mode.
Above-mentioned steps 202 are to transmission mode set T3The treatment process of middle transmission mode, if the result that step 201 divides
In, transmission mode set T3In without corresponding transmission mode when, then without step 202, be directly entered step 203.
Embodiment one:
In the present embodiment, it is assumed that the transmission mode of switching is participated in as transmitting diversity and two kinds of beam shaping, then, this implementation
Example transmission mode switching method the following steps are included:
Step 301: determining the weighting function expression formula for being used for transmission pattern switching；
Here, suppose that the system is the system for maximizing criterion based on spectrum efficiency, then, enable the W in expression formula (1)1
=1, W2=0, W3=0 and TH1=0.01, then expression formula (1) is deformed into expression formula (2):
F (SE, BLER, HFR, NI)=SE (1-BLER)+0 ε (HFR-0.01)+0NI
F (SE, BLER, HFR, NI)=SE (1-BLER) (2)
Step 302: information and scheduling information being reported according to the metrical information of base station side and terminal side, estimate each transmission
Under mode in weighting function expression formula each variable value；
Step 303a: according to the value of each variable in the weighting function expression formula of estimation, the transmission mode collection of switching will be participated in
It closes T and is divided into the transmission mode set T that can not become changeable transmission mode1, obtained transmission mode switching needed for it is complete
The transmission mode set T of portion's information2The transmission mode set T attempted with needs3；
Here, suppose that step 302 fails to estimate the value of each variable in effective weighting function expression formula, then, it will send out
It penetrates diversity and beam shaping and is divided in transmission mode set T3In set.
Step 303b: trial scheduling, the weighting of acquisition are carried out respectively to two kinds of transmission modes of transmitting diversity and beam shaping
The value of each variable in function expression；
Here, suppose that the channel quality of adjacent scheduling is basically unchanged, then, in order to obtain more accurate information, attempt
The scheduling pattern selection scheduling pattern of scheduling is 1., it may be assumed that transmitting diversity T3(1), beam shaping T3(2), transmitting diversity T3(1), wave beam
Excipient T3(2)...
For transmitting diversity T3(1), the value of each variable in the weighting function expression formula obtained after attempting scheduling are as follows: SE
=2.1, BLER=0.1, HFR=0, NI=0；
For beam shaping T3(2), the value of each variable in the weighting function expression formula obtained after attempting scheduling are as follows: SE
=3, BLER=0.1, HFR=0, NI=1.
Step 303c: according to the value of each variable in the weighting function expression formula of acquisition, the transmission mode set T is calculated3
In various transmission modes weighting function expression formula value；
According to expression formula (2), the value of the weighting function expression formula of transmitting diversity transmission mode are as follows:
F (SE, BLER, HFR, NI)=SE (1-BLER)=2.1 × (1-0.1)=1.89.
According to expression formula (2), the value of the weighting function expression formula of beamforming transmission mode are as follows:
F (SE, BLER, HFR, NI)=SE (1-BLER)=3 × (1-0.1)=2.7.
Step 303d: determine that the corresponding transmission mode of maximum value is changeable biography in the value of the weighting function expression formula
Defeated mode, and carry out transmission mode switching.
In the present embodiment, due to beam shaping weighting function expression formula value than transmitting diversity weighting function expression formula
Value it is big, therefore, changeable transmission mode is beam shaping, and then transmission mode is switched to beam shaping.
Embodiment two:
In the present embodiment, it is assumed that the transmission mode for participating in switching has transmitting diversity, single stream beam shaping and double-current wave beam to assign
Three kinds of type, then, the switching method of the transmission mode of the present embodiment the following steps are included:
Step 401: determining the weighting function expression formula for being used for transmission pattern switching；
Here, suppose that the system is the system for requiring packet loss to be not higher than 0.001, then, enable the W in expression formula (1)1=
1、W2=-100, W3=0 and TH1=0.001, then expression formula (1) is deformed into expression formula (3):
F (SE, BLER, HFR, NI)=SE (1-BLER) -100 ε (HFR-0.001)+0NI
- 100 ε (HFR-0.001) (3) of f (SE, BLER, HFR, NI)=SE (1-BLER)
Step 402: information and scheduling information being reported according to the metrical information of base station side and terminal side, estimate each transmission
Under mode in weighting function expression formula each variable value；
Information and scheduling information, the result of estimation are reported according to the metrical information of base station side and terminal side are as follows: double fluid
The value of the variable packet loss HFR of beamforming transmission mode is 0.01, and the value of variable block error rate BLER is 0.1, and other information is not
Know；The variable packet loss HFR of single stream beamforming transmission mode is 0.0001, and other information is unknown；Estimate transmitting diversity transmission
The information of mode is unknown；
Step 403a: according to the value of each variable in the weighting function expression formula of estimation, the transmission mode collection of switching will be participated in
Close the transmission mode set T for being divided into and can not becoming changeable transmission mode1, obtained transmission mode switching needed for whole
The transmission mode set T of information2The transmission mode set T attempted with needs3；
Specifically, assuming that the theoretially optimum value of variable spectrum efficiency SE is 5, theoretical worst-case value is 0；Variable is to adjacent area
The theoretially optimum value for interfering NI is 0, and theoretical worst-case value is 100；The theoretially optimum value of variable block error rate BLER is 0, theoretical
Worst-case value is 1；
The value of each variable in each transmission mode weighting function expression formula estimated according to step 402, assigns double-current wave beam
Type transmission mode, since variable packet loss HFR is 0.01 greater than 0.001, therefore even if variable spectrum efficiency SE takes theoretially optimum value
5, variable takes theoretially optimum value 0, the value of the expression formula of weighting function to the interference NI of adjacent area are as follows:
F (SE, BLER, HFR, NI)=5 × (1-0.1) -100 × 1+0 × 0=-95.5.
And beamforming transmission mode is flowed for single, even if variable spectrum efficiency SE takes theoretical worst-case value 0, variable is to adjacent area
Interference NI take theoretical worst-case value 100, variable block error rate BLER takes theoretical worst-case value 1；
F (SE, BLER, HFR, NI)=1 × 0 × (1-1) -100 × 0+0 × 100=0.
By above-mentioned calculating it is found that dual-layer beam forming transmission mode is divided in transmission mode set T1In, and singly flow
Beamforming transmission mode and transmitting diversity transmission mode are divided in transmission mode set T3In.
Step 403b: carrying out trial scheduling to transmitting diversity and single stream two kinds of transmission modes of beam shaping respectively, acquisition
The value of each variable in weighting function expression formula；
Here, suppose that channel quality is gradual, and it is simple in order to be realized in engineering, attempt the scheduling pattern selection scheduling figure of scheduling
Case is 2., it may be assumed that transmitting diversity T3(1), transmitting diversity T3(1), single stream beam shaping T3(2), single stream beam shaping T3(2)...
For transmitting diversity T3(1), the value of each variable in the weighting function expression formula obtained after attempting scheduling are as follows: SE
=2, BLER=0.1, HFR=0, NI=1；
Beam shaping T is flowed for single3(2), the value of each variable in the weighting function expression formula obtained after attempting scheduling
Are as follows: SE=1, BLER=0.1, HFR=0, NI=1；
Step 403c: according to the value of each variable in the weighting function expression formula of acquisition, the transmission mode set T is calculated3
In various transmission modes weighting function expression formula value；
According to expression formula (3), the value of the weighting function expression formula of transmitting diversity transmission mode are as follows:
- 100 ε (HFR-0.001)=1.8 of f (SE, BLER, HFR, NI)=SE (1-BLER)；
According to expression formula (3), the value of single weighting function expression formula for flowing beamforming transmission mode are as follows:
- 100 ε (HFR-0.001)=0.9 of f (SE, BLER, HFR, NI)=SE (1-BLER)；
Step 403d: determine that the corresponding transmission mode of maximum value is changeable biography in the value of the weighting function expression formula
Defeated mode, and carry out transmission mode switching.
In the present embodiment, due to weighting function table of the value than singly flowing beam shaping of the weighting function expression formula of transmitting diversity
Value up to formula is big, and therefore, changeable transmission mode is transmitting diversity, and then transmission mode is switched to transmitting diversity.
Fig. 3 is the composed structure schematic diagram of the switching device of transmission mode of the present invention, as shown in figure 3, the transmission mode
Switching device include determination unit 31, estimation unit 32 and the first computing unit 33 and switch unit 34；Wherein,
The determination unit 31, for determining the weighting function expression formula for being used for transmission pattern switching；
The estimation unit 32, for reporting information and scheduling to believe according to the metrical information of base station side and terminal side
Breath, estimates the value of each variable in the weighting function expression formula under each transmission mode；
Each variable includes spectrum efficiency, Block Error Rate, packet loss and generates to adjacent area in the weighting function expression formula
Interference.
The metrical information of the base station side includes: channel-estimation information and channel measurement information；
The information that reports of the terminal side includes: channel quality instruction, pre-coding matrix instruction and order instruction；
The scheduling information of the terminal side includes: the transmission mould of scheduling times, the modulation of scheduling and encoding scheme and scheduling
Formula.
First computing unit 33, for calculating the value of the weighting function expression formula under each transmission mode；
The switch unit 34, maximum value or the corresponding biography of minimum value in the value for determining the weighting function expression formula
Defeated mode is changeable transmission mode, and carries out transmission mode switching.
Further, the switching device of the transmission mode further includes selecting unit, the selecting unit, is added for described
When maximum value or the corresponding transmission mode of minimum value have multiple in the value of weight function expression formula, according to random selection or permanent order
Determine changeable transmission mode.
Fig. 4 is the composed structure schematic diagram of the first computing unit in Fig. 3, as shown in figure 4, first computing unit 33 wraps
Include division unit 41, scheduling unit 42 and the second computing unit 43；Wherein,
The division unit 41, for each variable in weighting function expression formula described under each transmission mode according to estimation
The transmission mode set T for participating in switching is divided into the transmission mode set T that can not become changeable transmission mode by value1,
The transmission mode set T of all information needed for obtaining transmission mode switching2The transmission mode set T attempted with needs3；
The scheduling unit 42, for the transmission mode set T3It is carried out in a scheduling window according to scheduling pattern
Scheduling is attempted, the value of each variable in weighting function expression formula is obtained；
Here, the scheduling window is for describing continuously to dispatch several times；System loss is brought due to attempting scheduling meeting, because
This, dispatch the setting range of window and be generally arranged according to the expense that system can allow for, generally the switching cycle of transmission mode
1%-10%.The scheduling pattern includes:
Scheduling pattern one: in order or backward is successively to the transmission mode set T3Interior each transmission mode is followed
Ring scheduling；
Scheduling pattern two: in order or backward is successively to the transmission mode set T3Interior each transmission mode is followed
Ring scheduling, and the number continuously dispatched in the every wheel of each transmission mode is greater than once；
Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode
It is scheduled, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；
Scheduling pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and each biography
The number continuously dispatched in the defeated every wheel of mode is greater than primary.
Second computing unit 43, for calculating all information obtained needed for transmission mode switches divided
Transmission mode set T2In weighting function expression formula under various transmission modes value；And according to the weighting function table of acquisition
Value up to variable each in formula calculates the transmission mode set T3In various transmission modes weighting function expression formula value.
If the above-mentioned integrated unit of the present invention is realized in the form of software function module and is sold as independent product
Or it in use, also can store in a computer readable storage medium.Based on this understanding, the embodiment of the present invention
Substantially the part that contributes to existing technology can be embodied in the form of software products technical solution in other words, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) execute all or part of each embodiment the method for the present invention.And it is preceding
The storage medium stated includes: movable storage device, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (12)
1. a kind of switching method of transmission mode, which is characterized in that the described method includes:
Determine the weighting function expression formula for being used for transmission pattern switching；
Report information and scheduling information according to the metrical information of base station side and terminal side, estimate it is described under each transmission mode plus
The value of each variable in weight function expression formula；
Calculate the value of the weighting function expression formula under each transmission mode；
Determine that maximum value or the corresponding transmission mode of minimum value are changeable transmission mould in the value of the weighting function expression formula
Formula, and carry out transmission mode switching.
2. the method according to claim 1, wherein the weighting function table calculated under each transmission mode
Up to the value of formula, comprising:
According to the value of each variable in weighting function expression formula described under each transmission mode of estimation, transmission mode set is divided；
The transmission mode set T that the needs divided are attempted3It attempts to dispatch according to scheduling pattern in a scheduling window, obtain
The value of each variable in weighting function expression formula；
Calculate the transmission mode set T for having obtained the required all information of transmission mode switching divided2In various transmission modes
Under weighting function expression formula value；And the transmission is calculated according to the value of each variable in the weighting function expression formula of acquisition
Set of modes T3In various transmission modes weighting function expression formula value.
3. according to the method described in claim 2, it is characterized in that, the scheduling pattern includes:
Scheduling pattern one: in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out circulation tune
Degree；
Scheduling pattern two: in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out circulation tune
Degree, and the number continuously dispatched in the every wheel of each transmission mode is greater than once；
Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；
Scheduling pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode is scheduled,
Even number wheel is in reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and each transmission mode
The number continuously dispatched in every wheel is greater than primary.
4. the method according to claim 1, wherein each variable in the weighting function expression formula includes frequency spectrum
Efficiency, Block Error Rate, packet loss and the interference that adjacent area is generated.
5. the method according to claim 1, wherein the metrical information of the base station side includes: channel estimation letter
Breath and channel measurement information；
The information that reports of the terminal side includes: channel quality instruction, pre-coding matrix instruction and order instruction；
The scheduling information of the terminal side includes: the transmission mode of scheduling times, the modulation of scheduling and encoding scheme and scheduling.
6. method according to any one of claims 1 to 5, which is characterized in that the method also includes: the weighting function
When maximum value or the corresponding transmission mode of minimum value have multiple in the value of expression formula, determined according to random selection or permanent order
Changeable transmission mode.
7. a kind of switching device of transmission mode, which is characterized in that described device includes determination unit, estimation unit, the first meter
Calculate unit and switch unit, wherein
The determination unit, for determining the weighting function expression formula for being used for transmission pattern switching；
The estimation unit, for reporting information and scheduling information, estimation according to the metrical information of base station side and terminal side
Under each transmission mode in the weighting function expression formula each variable value；
First computing unit, for calculating the value of the weighting function expression formula under each transmission mode；
The switch unit, maximum value or the corresponding transmission mode of minimum value in the value for determining the weighting function expression formula
For changeable transmission mode, and carry out transmission mode switching.
8. device according to claim 7, which is characterized in that first computing unit includes division unit, scheduling list
Member and the second computing unit, wherein
The division unit is drawn for the value of each variable in weighting function expression formula described under each transmission mode according to estimation
Divide transmission mode set；
The scheduling unit, the transmission mode set T for attempting the needs divided3According to scheduling in a scheduling window
Pattern carries out trial scheduling, obtains the value of each variable in weighting function expression formula；
Second computing unit, for calculating the transmission mould for having obtained the required all information of transmission mode switching divided
Formula set T2In weighting function expression formula under various transmission modes value；And according in the weighting function expression formula of acquisition
The value of each variable calculates the transmission mode set T3In various transmission modes weighting function expression formula value.
9. device according to claim 8, which is characterized in that the scheduling pattern includes:
Scheduling pattern one: in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out circulation tune
Degree；
Scheduling pattern two: in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out circulation tune
Degree, and the number continuously dispatched in the every wheel of each transmission mode is greater than once；
Scheduling pattern three: odd number wheel is in order or backward is successively to the transmission mode set T3Interior each transmission mode carries out
Scheduling, even number wheel is in reverse order or sequence is successively to the transmission mode set T3Interior each transmission mode is scheduled；
Scheduling pattern four: odd number wheel is in order or backward is to the transmission mode set T3Interior each transmission mode is scheduled,
Even number wheel is in reverse order or sequence is to the transmission mode set T3Interior each transmission mode is scheduled, and each transmission mode
The number continuously dispatched in every wheel is greater than primary.
10. device according to claim 7, which is characterized in that each variable in the weighting function expression formula includes frequency
Spectrum efficiency, Block Error Rate, packet loss and the interference that adjacent area is generated.
11. device according to claim 7, which is characterized in that the metrical information of the base station side includes: channel estimation letter
Breath and channel measurement information；
The information that reports of the terminal side includes: channel quality instruction, pre-coding matrix instruction and order instruction；
The scheduling information of the terminal side includes: the transmission mode of scheduling times, the modulation of scheduling and encoding scheme and scheduling.
12. according to the described in any item devices of claim 7 to 11, which is characterized in that described device further includes selecting unit；
The selecting unit has more for maximum value in the value of the weighting function expression formula or the corresponding transmission mode of minimum value
When a, changeable transmission mode is determined according to random selection or permanent order.
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| CN201310196213.1A CN104185206B (en) | 2013-05-23 | 2013-05-23 | A kind of switching method and device of transmission mode |
| RU2015148748A RU2615998C1 (en) | 2013-05-23 | 2013-12-30 | Method and device for communication mode switching and computer data media |
| JP2016513203A JP6073026B2 (en) | 2013-05-23 | 2013-12-30 | Transmission mode switching method and apparatus, and computer storage medium |
| PCT/CN2013/090928 WO2014187140A1 (en) | 2013-05-23 | 2013-12-30 | Method and apparatus for switching transmission mode, and computer storage medium |
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| CN103095397A (en) * | 2011-11-04 | 2013-05-08 | 华为技术有限公司 | Transmission mode switching method and device and system |
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| KR100713403B1 (en) * | 2003-09-30 | 2007-05-04 | 삼성전자주식회사 | Apparatus and method for controlling transmission scheme according to channel state in a communication system |
| EP1750376B1 (en) * | 2004-06-14 | 2015-10-21 | Panasonic Intellectual Property Management Co., Ltd. | Radio communication device |
| CN101557559B (en) * | 2008-04-11 | 2011-09-21 | 中兴通讯股份有限公司 | Method for switching transmission modes of multimedia broadcasting service and multicasting service |
| JP2010056615A (en) * | 2008-08-26 | 2010-03-11 | Panasonic Electric Works Co Ltd | Load control system |
| CN102244564B (en) * | 2010-05-11 | 2014-12-10 | 中兴通讯股份有限公司 | Downlink transmission method and base station of MIMO (Multiple Input Multiple Output) system |
| IN2010DE02109A (en) * | 2010-09-03 | 2015-08-14 | Motorola Mobility Inc | |
| JP5651005B2 (en) * | 2010-12-22 | 2015-01-07 | 京セラ株式会社 | Base station, communication terminal and communication system |
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| CN103095397A (en) * | 2011-11-04 | 2013-05-08 | 华为技术有限公司 | Transmission mode switching method and device and system |
| CN102724726A (en) * | 2012-06-12 | 2012-10-10 | 大唐移动通信设备有限公司 | Method and device for switching multiple input multiple output (MIMO) mode in transmission mode (TM8) in long-term evolution (LTE) system |
| CN102970119A (en) * | 2012-11-09 | 2013-03-13 | 大唐移动通信设备有限公司 | Method for switching first transmission mode into second transmission mode |
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| JP6073026B2 (en) | 2017-02-01 |
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