CN104507112B - The method of adjustment and device of MCS thresholdings, base station - Google Patents
The method of adjustment and device of MCS thresholdings, base station Download PDFInfo
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- CN104507112B CN104507112B CN201410838280.3A CN201410838280A CN104507112B CN 104507112 B CN104507112 B CN 104507112B CN 201410838280 A CN201410838280 A CN 201410838280A CN 104507112 B CN104507112 B CN 104507112B
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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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
- H04L1/0004—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes applied to control information
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Abstract
The invention discloses a kind of method of adjustment of MCS thresholdings and device, base station, this method to include：According to the current Modulation and Coding Scheme MCS thresholdings of descending pilot frequency time slot DwPTS, spectrum efficiency corresponding to the current MCS thresholdings is determined；Determine whether sent data volume under highest ranking MCS corresponding to the DwPTS in preset time period；If being sent in the preset time period under highest ranking MCS corresponding to the DwPTS has data volume, according to the BLER of the highest ranking MCS, the MCS thresholdings of the DwPTS after acquisition adjustment.By judging whether highest ranking MCS sends data volume and highest ranking MCS BLER, MCS thresholdings are adjusted, by this method in different network states, the dynamic adjustment of MCS thresholdings is realized, improves the handling capacity of each user equipment.
Description
Technical field
The present invention relates to the communication technology, and in particular to a kind of method of adjustment of MCS thresholdings and device, base station.
Background technology
Dual mode system is to include TD SDMA (Time Division Synchronized Code
Division Multiple Access, abbreviation TD-SCDMA) use frequency range and TD SDMA-Long Term Evolution
(TD-SCDMA Long Term Evolution, abbreviation TD-LTE) uses the broadband system of frequency range.Because dual mode system is adopted
Reception and sendaisle are shared, therefore can have interference phenomenon, for example, when TD-SCDMA frequency ranges are transmission state
When, when TD-LTE frequency ranges are reception state, i.e. TD-SCDMA and asynchronous TD-LTE transmitting-receivings, then combining can not be passed through by receiving and dispatching path
Wave filter is isolated, and now two frequency range reiving/transmitting states are inconsistent, can there is interference at crossed slot phenomenon, and transmission path
Signal feeds back to receiving path, may cause the damage of radio frequency reception path.
It is existing in order to be interfered with each other when solving the problems, such as that TD-SCDMA and TD-LTE transmitting-receivings are inconsistent in dual mode system
The method commonly used in technology is the frame header position by translating TD-SCDMA and TD-LTE signal transmitteds, to ensure above-mentioned two
In frequency range sub-frame of uplink to descending sub frame switch when switching point align, and by adjusting the protection time slot in TD-LTE frequency ranges
(Guard Period, abbreviation GP) size avoids interference up and down in the ranks.But although this method is solved in dual mode system
The interference problem of TD-SCDMA frequency ranges and TD-LTE frequency ranges up and down in the ranks, but it cannot be guaranteed that TD-SCDMA frequency ranges and TD-LTE frequency ranges
In all subframe ratios can coexist.Meanwhile this method result in descending pilot frequency time slot in the configuration of TD-LTE special subframes
(Downlink Pilot Time Slot, abbreviation DwPTS) longer configuration can not use, so as to have influence on whole system
Handling capacity.
The defects of in order to overcome the above method to exist, one kind is had also been proposed in the prior art and zooms out mould applied to dual-mode radio frequency
Subframe configuration method in block (Radio Remote Unit, abbreviation RRU), by selling the part DwPTS of TD-LTE system,
Make the DwPTS of TD-LTE system and uplink pilot time slot (Uplink Pilot Time Slot, the abbreviation of TD-SCDMA system
UpPTS) do not conflict, while remain the function of the DwPTS bearing data services in TD-LTE system to a certain extent.At present
2 are used in TD-SCDMA:4 configurations, and TD-LTE subframes are that 2 configurations coexist, and special subframe is using configuration 6 (9:3:2) under configuring,
In order to ensure in TD-SCDMA and TD-LTE that ascending-descending subframes are not coexisted, it is necessary to do truncation processing to TD-LTE the 9th symbol,
More due to truncating length, during descending scheduling PDSCH, DwPTS needs to limit Modulation and Coding Scheme (Modulation and
Coding Scheme, abbreviation MCS) grade, but and do not know actual DwPTS average MCS grades can reach how many.
At present mainly using by operation maintenance personnel configuration parameter, to limit DwPTS single current MCS threshold values and double fluid
MCS threshold values, when in different network states, it may be necessary to different MCS grades, and by operative configuration, it can only configure
The parameter of one compromise, can not adaptively be adjusted according to network state, in addition, MCS grades are the parameter of cell-level at present,
When whole cell configuration is consistent, the individual difference of terminal can not be embodied, when the descending ability of individual terminal is slightly weak, then can be caused
BLock error rate (Block Error Ratio, the abbreviation BLER) rise of the terminal, rate reduction so that user equipment experience is poor.
The content of the invention
For in the prior art the defects of, it is real the invention provides a kind of method of adjustment of MCS thresholdings and device, base station
Show the adjustment to MCS thresholdings, improve the handling capacity of each user equipment.
In a first aspect, the present invention provides a kind of method of adjustment of MCS thresholdings, including：
According to the current Modulation and Coding Scheme MCS thresholdings of descending pilot frequency time slot DwPTS, the current MCS thresholdings are determined
Corresponding spectrum efficiency；
Determine whether sent data volume under highest ranking MCS corresponding to the DwPTS in preset time period；
If being sent in the preset time period under highest ranking MCS corresponding to the DwPTS has data volume, according to
Highest ranking MCS BLER, obtain the MCS thresholdings of the DwPTS after adjustment.
Optionally, the MCS thresholding current according to DwPTS, determine that frequency spectrum corresponding to the current MCS thresholdings is imitated
Rate, including：
According to the current MCS thresholdings of DwPTS, default form is searched, obtains frequency spectrum corresponding to the current MCS thresholdings
Efficiency；
Wherein, the form is according to the spectrum efficiency that third generation partner program 3GPP agreements determine and MCS thresholdings
Corresponding form.
Optionally, the BLER according to the highest ranking MCS, the MCS thresholdings of the DwPTS after adjustment are obtained, including：
According to the BLER of the highest ranking MCS, it is determined that the spectrum efficiency of amendment；
According to the spectrum efficiency of amendment, default form is searched, obtains MCS thresholdings corresponding to the spectrum efficiency of amendment；
MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment；
Wherein, the form is the spectrum efficiency form corresponding with MCS thresholdings determined according to 3GPP agreements.
Optionally, the BLER according to the highest ranking MCS, it is determined that the spectrum efficiency of amendment, including：
Determine whether highest ranking MCS BLER is less than default BLER thresholdings；
If it is, spectrum efficiency corresponding to the current MCS thresholdings is increased to the up-regulation amount of default spectrum efficiency,
The spectrum efficiency corrected；
Otherwise, it determines whether the special subframe data volume sent in the current preset period is more than or equal to a upper preset time
The special subframe data volume sent in section；
If the special subframe data volume sent in the current preset period is more than the spy sent in a upper preset time period
Different sub-frame data amount, then using spectrum efficiency corresponding to current MCS thresholdings as the spectrum efficiency corrected；
If the special subframe data volume in the current preset period is less than the special subframe number in a upper preset time period
According to amount, then spectrum efficiency corresponding to the current MCS thresholdings is reduced to the downward amount of default spectrum efficiency, corrected
Spectrum efficiency.
Optionally, if MCS the thresholdings current DwPTS are single current MCS thresholdings,
Spectrum efficiency corresponding to current MCS thresholdings is single current spectrum efficiency, highest ranking MCS corresponding to the DwPTS
The single current MCS thresholdings that MCS thresholdings for the DwPTS after single current highest ranking MCS, and adjustment are the DwPTS after adjustment.
Optionally, if not sending data under single current highest ranking MCS corresponding to the DwPTS in the preset time period
Amount, methods described also include：
Determine whether sent data volume under double-current highest ranking MCS corresponding to the DwPTS in preset time period；
If being sent in the preset time period under double-current highest ranking MCS corresponding to the DwPTS has data volume, basis
The BLER of the double-current highest ranking MCS, obtain the double-current MCS thresholdings of the DwPTS after adjustment.
Optionally, if not sending data under double-current highest ranking MCS corresponding to the DwPTS in the preset time period
Amount, then the current double-current MCS thresholdings of the DwPTS are not adjusted, and repeat to determine single corresponding to the DwPTS in preset time period
The step of whether data volume having been sent under stream highest ranking MCS.
Second aspect, the invention provides a kind of adjusting apparatus of MCS thresholdings, including：
First determining module, for according to Modulation and Coding Scheme MCS thresholdings current descending pilot frequency time slot DwPTS, it is determined that
Spectrum efficiency corresponding to the current MCS thresholdings；
Second determining module, for determining whether sent under highest ranking MCS corresponding to the DwPTS in preset time period
There is data volume；
MCS thresholding adjusting modules, issued for highest ranking MCS corresponding to the DwPTS in the preset time period
When having sent data volume, then according to the BLER of the highest ranking MCS, the MCS thresholdings of the DwPTS after acquisition adjustment.
Optionally, first determining module, is used for：
According to the current MCS thresholdings of DwPTS, default form is searched, obtains frequency spectrum corresponding to the current MCS thresholdings
Efficiency；
Wherein, the form is according to the spectrum efficiency that third generation partner program 3GPP agreements determine and MCS thresholdings
Corresponding form.
Optionally, the MCS thresholdings adjusting module, including：
Spectrum efficiency determining unit, for the BLER according to the highest ranking MCS, it is determined that the spectrum efficiency of amendment；
MCS thresholding amending units, for the spectrum efficiency according to amendment, default form is searched, obtains the frequency spectrum of amendment
MCS thresholdings corresponding to efficiency, the MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment；
Wherein, the form is the spectrum efficiency form corresponding with MCS thresholdings determined according to 3GPP agreements.
Optionally, the spectrum efficiency determining unit, is used for：
When it is determined that highest ranking MCS BLER is less than default BLER thresholdings, by corresponding to the current MCS thresholdings
Spectrum efficiency increases the up-regulation amount of default spectrum efficiency, the spectrum efficiency corrected；
It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and transmission in the current preset period
Special subframe data volume be more than a upper preset time period in send special subframe data volume when, then by current MCS thresholdings
Spectrum efficiency of the corresponding spectrum efficiency as amendment；
It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and the spy in the current preset period
It is when different sub-frame data amount is less than the special subframe data volume in a upper preset time period, then the current MCS thresholdings is corresponding
Spectrum efficiency reduce the downward amount of default spectrum efficiency, the spectrum efficiency corrected.
Optionally, when MCS the thresholdings current DwPTS are single current MCS thresholdings, frequency corresponding to current MCS thresholdings
Spectrum efficiency is single current spectrum efficiency, and highest ranking MCS corresponding to the DwPTS is single current highest ranking MCS, and after adjustment
DwPTS MCS thresholdings are the single current MCS thresholdings of the DwPTS after adjustment.
Optionally, the MCS thresholdings adjusting module, is used for：
Do not send data volume under single current highest ranking MCS corresponding to the DwPTS in the preset time period, and determine
When transmission has data volume under double-current highest ranking MCS corresponding to the DwPTS in preset time period, then according to the double-current highest
Grade MCS BLER, obtain the double-current MCS thresholdings of the DwPTS after adjustment.
Optionally, the MCS thresholdings adjusting module, is used for：
When not sending data volume under double-current highest ranking MCS corresponding to the DwPTS in the preset time period, then not
Adjust the current double-current MCS thresholdings of the DwPTS.
The third aspect, present invention also offers a kind of base station, including any described MCS in the claims 8 to 14
The adjusting apparatus of thresholding.
As shown from the above technical solution, the method for adjustment of MCS thresholdings of the invention and device, base station, this method are mainly
Ensure to configure 6 (9 in TD-SCDMA and TD-LTE bimodulus special subframe:3:2) under configuration, cut in the 9th symbol of special subframe
It is as short as after few 6 μ s, by judging whether highest ranking MCS sends data volume and highest ranking MCS BLER, adjusts MCS
Thresholding, by this method in different network states, the dynamic adjustment of MCS thresholdings is realized, improves each user equipment
Handling capacity.
Brief description of the drawings
Fig. 1 is prior art TD-LTE special subframe configuration structure schematic diagrames；
Fig. 2 is prior art TD-SCDMA5:2 and TD-LTE special subframes configuration 6 (9:3:2) configuration diagram；
Fig. 3 is prior art TD-LTE special subframes configuration 6 (9:3:2) expanded view；
Fig. 4 is prior art TD-LTE special subframes configuration 6 (9:3:2) the 9th symbol expanded view of DwPTS；
Fig. 5 is the schematic flow sheet of the method for adjustment for the MCS thresholdings that one embodiment of the invention provides；
Fig. 6 is the schematic flow sheet of the method for adjustment for the MCS thresholdings that another embodiment of the present invention provides；
Fig. 7 is the schematic flow sheet for the spectrum efficiency modification method that another embodiment of the present invention provides；
Fig. 8 is the structural representation of the adjusting apparatus for the MCS thresholdings that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of invention is further described.Following examples are only used for more clear
Illustrate to Chu technical scheme, and can not be limited the scope of the invention with this.
Present invention relates particularly to one kind 6 (9 are configured in TD-SCDMA and TD-LTE bimodulus special subframe:3:2) under configuring
MCS threshold regulating methods, mainly ensure in DwPTS：GP：UpPTS is 9:3:Under 2 configurations, the 9th symbol of special subframe truncates
After at least 6 μ s, MCS grades according to bLock error rate BLER and highest ranking MCS send whether data volume, it is special to adjust single double fluid
The MCS grades of subframe, so as to reach the purpose of maximum throughput.
In order to become apparent from understanding present disclosure, now to current TD-SCDMA and TD-LTE bimodulus special subframe configuration 6
(9:3:2) configuration is described in detail.
Dual mode system is to use frequency range and TD-LTE to use the broadband system of frequency range comprising TD-SCDMA.Due to bimodulus
The reception and sendaisle that system uses are shared, therefore can have interference phenomenon, for example, when TD-SCDMA frequency ranges are transmission
During state, when TD-LTE frequency ranges are reception state, i.e. TD-SCDMA and asynchronous TD-LTE transmitting-receivings, then receiving and dispatching path can not pass through
Combining wave filter is isolated, and now two frequency range reiving/transmitting states are inconsistent, can have interference at crossed slot phenomenon, and send
Path signal feeds back to receiving path, may cause the damage of radio frequency reception path.It is as shown in table 1 the special son of TD-LTE system
Frame allocation list, the form is foundation with agreement 36.211, in units of sampled point.
Table 1
It is existing in order to be interfered with each other when solving the problems, such as that TD-SCDMA and TD-LTE transmitting-receivings are inconsistent in dual mode system
The method commonly used in technology is the frame header position by translating TD-SCDMA and TD-LTE signal transmitteds, to ensure above-mentioned two
In frequency range sub-frame of uplink to descending sub frame switch when switching point align, and the GP sizes by adjusting in TD-LTE frequency ranges avoid
Interference in the ranks up and down.But although this method solves TD-SCDMA frequency ranges and TD-LTE frequency range up-downgoings in dual mode system
Between interference problem, but it cannot be guaranteed that TD-SCDMA frequency ranges and TD-LTE frequency ranges in all subframe ratios can coexist.Together
When, this method result in the configuration that DwPTS is longer in the configuration of TD-LTE special subframes and can not use, so as to have influence on whole system
The handling capacity of system.
The defects of in order to overcome the above method to exist, a kind of subframe being applied in RRU is had also been proposed in the prior art and is matched somebody with somebody
Method is put, by selling the part DwPTS of TD-LTE system, makes the DwPTS of TD-LTE system and the UpPTS of TD-SCDMA system
Do not conflict, while remain the function of the DwPTS bearing data services in TD-LTE system to a certain extent.
Below with TD-SCDMA5:2 and TD-LTE up-downgoings special subframe configuration 2 (3:1:1) exemplified by, introduce above-mentioned
Applied to the subframe configuration method in bimodulus RRU.TD-SCDMA ascending-descending subframes are configured to 5:2, represent there is 5 in every field
Individual descending sub frame and 2 sub-frame of uplink.TD-LTE sub-frame configurations 2 correspond in table 2 situation for configuring serial number 2, represent every
There are 3 descending sub frames, 1 sub-frame of uplink and 1 special subframe in field, wherein, special subframe uses in table 1 and configures serial number
6 situation.
Table 2
As shown in figure 1, existing network uses sub-frame configuration as 2 (1 at present:3), special subframe configuration 5 (3:9:2), according to agreement
Regulation, when special subframe is configured to 5 (3:9:2) when, DwPTS does not retransmit Physical Downlink Shared Channel (Physical
Downlink Shared Channel, abbreviation PDSCH) data, the handling capacity of system is had a great influence.Adopted as shown in Fig. 2 working as
6 (9 are configured to special subframe:3:2) when, DwPTS can transmit downlink data, and the handling capacity of lifting system.
Fig. 3 is Fig. 2 special subframe expanded schematic diagram.TD-SCDMA frame header position is translated into 700 μ s backward, ensured
The back boundary of TD-SCDMA the 2nd sub-frame of uplink is alignd with the back boundary of TD-LTE the 1st sub-frame of uplink, due to TD-
SCDMA time offset (Offset) is 700 μ s, and the time interval of descending sub frame is that 675 μ s, GP are 275 μ s, TD-LTE
The time interval that the time interval of the descending sub frame of (special subframe configuration 6) is 1000 μ s, DwPTS is 19760Ts/ 30720M=
643.23 μ s, by calculating, after Δ=700+675+275-1000-643.23=6.77 μ s, TD-SCDMA UpPTS
Border and TD-LTE DwPTS back boundary do not line up simultaneously, TD-SCDMA UpPTS DwPTS of the back boundary with respect to TD-LTE
Back boundary stagger backward 6.77 μ s.
Fig. 4 is Fig. 3 TD-LTE the 9th symbol expanded schematic diagram figure of DwPTS, in order to ensure TD-SCDMA and TD-LTE
Middle ascending-descending subframes are not coexisted, it is necessary to do specially treated to TD-LTE the 9th symbol, it is contemplated that TD-LTE radio-frequency receiving-transmitting is opened
Close (switching switch) from descending sub frame to sub-frame of uplink time be 8 μ s, the TD-SCDMA up reception times in advance be 6chips
=4.6875 μ s, therefore need to do TD-LTE DwPTS the 9th symbol truncation processing, truncation length is 8+4.6875-6.77
=5.9175 μ s.More due to truncating length, during descending scheduling PDSCH, DwPTS needs MCS grades, but and uncertain actual
DwPTS average MCS grades can reach how many.
At present mainly using by operation maintenance personnel configuration parameter, to limit DwPTS single current MCS threshold values and double fluid
MCS threshold values, when in different network states, it may be necessary to different MCS grades, and by operative configuration, it can only configure
The parameter of one compromise, can not adaptively be adjusted according to network state, in addition, MCS grades are the parameter of cell-level at present,
When whole cell configuration is consistent, the individual difference of terminal can not be embodied, when the descending ability of individual terminal is slightly weak, then can be caused
BLock error rate (Block Error Ratio, the abbreviation BLER) rise of the terminal, rate reduction so that user equipment experience is poor.
The present invention based on it is above-mentioned in the prior art the defects of, solve above-mentioned MCS grades and be not adapted dynamically, and in net
During the difference of network state, the defects of parameter of compromise can only be configured, in order to realize to the adjustment of the dynamics of MCS thresholdings, carry
The handling capacity of each user equipment is risen so that user equipment, can no matter at the better of network state, midpoint or not good enough
Reach preferable handling capacity.
Fig. 5 shows a kind of schematic diagram of the method for adjustment of MCS thresholdings of the embodiment of the present invention, as shown in figure 5, the MCS doors
The self-adapting regulation method of limit comprises the following steps：
501st, according to Modulation and Coding Scheme MCS thresholdings current descending pilot frequency time slot DwPTS, the current MCS is determined
Spectrum efficiency corresponding to thresholding.
In a particular application, above-mentioned steps are after accessing terminal to network first, and DwPTS threshold value is entered as grasping
Make maintenance Configuration Values, as initial value.According to the current MCS thresholdings of DwPTS, default form is searched, it is as shown in table 3 below, obtain
Obtain spectrum efficiency corresponding to the current MCS thresholdings.Wherein, the table 3 be according to 3GPP agreements determine spectrum efficiency with
Table corresponding to MCS thresholdings.
Table 3
It will be appreciated that above-mentioned MCS thresholdings include single current MCS thresholdings and double-current MCS thresholdings；If the DwPTS is current
MCS thresholdings are single current MCS thresholdings, then, spectrum efficiency corresponding to current MCS thresholdings is single current spectrum efficiency；If the DwPTS
Current MCS thresholdings are double-current MCS thresholdings, then, spectrum efficiency corresponding to current MCS thresholdings is double-current spectrum efficiency.
502nd, determine whether sent data volume under highest ranking MCS corresponding to the DwPTS in preset time period.
For example, above-mentioned preset time period can to this, the cycle adjusts according to actual conditions, and the present invention is not
Limit the specific period.
Highest ranking MCS corresponding to above-mentioned DwPTS is that the present invention is not according to the highest ranking selected in the DwPTS
Limit the grade occurrence of highest ranking.
If the 503rd, being sent in the preset time period under highest ranking MCS corresponding to the DwPTS has data volume, basis
The BLER of the highest ranking MCS, obtain the MCS thresholdings of the DwPTS after adjustment.
In a particular application, as long as in preset time period, whether the current highest ranking MCS of DwPTS subframes sends data
Amount, if the data volume sent is 0, i.e. the MCS of highest ranking does not send data, then illustrates that the data volume of DwPTS scheduling is smaller,
The highest MCS grades of current setting are not used, in this case, avoid the need for adjusting MCS thresholdings；In another situation
Under, if the data volume sent is more than 0, i.e. the MCS of highest ranking has sent data, then when illustrating that DwPTS sends downlink data, makes
With highest MCS grades are currently configured, then need to carry out the adjustment of MCS thresholdings, corrected according to highest ranking MCS BLER
The spectrum efficiency of MCS thresholdings, spectrum efficiency after being corrected, and according to the revised spectrum efficiency by table look-up obtain with
MCS thresholdings corresponding to the revised spectrum efficiency.
The above method ensures to configure 6 (9 in TD-SCDMA and TD-LTE bimodulus special subframe:3:2) under configuration, special
After the 9th symbol of subframe truncates at least 6 μ s, MCS doors are adjusted according to the BLER of the highest ranking MCS data volumes sent and MCS
Limit, this method improve the handling capacity of each user equipment by adjusting MCS thresholdings.
In specific implementation process, above-mentioned steps 503 also include the following sub-step not shown in Fig. 5：
5031st, according to the BLER of the highest ranking MCS, it is determined that the spectrum efficiency of amendment.
For example, above-mentioned steps 5031 may also include the sub-step not shown in following figures：
A01, determine whether highest ranking MCS BLER is less than default BLER thresholdings.
, will be described current if determining that highest ranking MCS BLER is less than default BLER thresholdings in A02, step A01
MCS thresholdings corresponding to spectrum efficiency increase the up-regulation amount of default spectrum efficiency, the spectrum efficiency corrected.
For example, spectrum efficiency corresponding to current MCS thresholdings can be the current MCS determined in above-mentioned steps 501
Spectrum efficiency corresponding to thresholding, the spectrum efficiency obtain by test of many times, also the spectrum efficiency are defined as default
Spectrum efficiency, the up-regulation amount for presetting spectrum efficiency are also to be chosen by test of many times.
If determine that highest ranking MCS BLER is not less than default BLER thresholdings in A03, step A01, it is determined that current
Whether the special subframe data volume in preset time period is more than the special subframe data volume in a upper preset time period；
If the special subframe data volume in the current preset period is more than the special subframe number in a upper preset time period
According to amount, then using spectrum efficiency corresponding to current MCS thresholdings as the spectrum efficiency corrected.
If the special subframe data volume in the current preset period is less than the special subframe number in a upper preset time period
According to amount, then spectrum efficiency corresponding to the current MCS thresholdings is reduced to the downward amount of default spectrum efficiency, corrected
Spectrum efficiency.
For example, the downward amount of default spectrum efficiency can be to be obtained by test of many times, and the present embodiment is only to lift
Example explanation, it is unlimited fix tune amount number.
5032nd, according to the spectrum efficiency of amendment, default form is searched, obtains MCS doors corresponding to the spectrum efficiency of amendment
Limit.
In the present embodiment, the form at this is foregoing default form, i.e., the frequency spectrum determined according to 3GPP agreements is imitated
Rate form corresponding with MCS thresholdings, table 3 as implied above.
5033rd, the MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment.
The above method is by the BLER according to the highest ranking MCS, it is determined that the spectrum efficiency of amendment so that revised
Spectrum efficiency is more accurate, thus, improves the handling capacity of each user equipment, improves user equipment perceptibility.
In the concrete application of the above method, because above-mentioned MCS thresholdings include single current MCS thresholdings and double-current MCS thresholdings,
Therefore in above method running, and in particular to the adjustment of single current MCS thresholdings and double-current MCS thresholdings, in order to more clearly
The specific method of adjustment of single current MCS thresholdings and double-current MCS thresholdings in the bright present invention, the present invention are entered using another embodiment
Row explanation.
Fig. 6 shows a kind of method of adjustment for MCS thresholdings that another embodiment of the present invention provides, as shown in fig. 6, the single current
MCS thresholdings and double-current MCS threshold regulating methods comprise the following steps：
601st, the single current MCS thresholdings of the DwPTS and double-current MCS thresholdings are determined.
In specific implementation process, accessing terminal to network first, then by DwPTS single current MCS thresholdings and double-current MCS doors
Limit value is entered as the Configuration Values of Operation and Maintenance, and is used as initial value.
Pass through the channel condition according to user equipment so that each user equipment there can be the double-current MCS doors of respective list
Limit, on the interface of Operation and Maintenance, it is only necessary to which single double-current MCS initial values are set.
602nd, according to above-mentioned single current MCS thresholdings and double-current MCS thresholdings, single current frequency spectrum corresponding with single current MCS thresholdings is obtained
Efficiency and double-current spectrum efficiency corresponding with the double-current MCS thresholdings.
In a particular application, according to above-mentioned single current MCS thresholdings and double-current MCS thresholdings by table look-up (such as upper table 3) calculate
Single current spectrum efficiency corresponding with single current MCS thresholdings and double-current spectrum efficiency corresponding with double-current MCS thresholdings.
603rd, judge whether to reach preset time period.
For example, above-mentioned preset time period can adjust according to actual conditions to time period, and the present invention is simultaneously
The specific period is not limited.
604th, when reaching preset time period, the single current highest ranking MCS of the DwPTS and double-current highest ranking are determined
The data volume whether MCS sends.
If determining to be not reaching to preset time period in step 603, may wait for subsequently being walked after reaching preset time period
Rapid 604 operation.
605th, judge whether sent number under single current highest ranking MCS corresponding to the DwPTS in the preset time period
According to amount.
606th, in step 605, if being sent in preset time period under single current highest ranking MCS corresponding to the DwPTS has
Data volume, then count single current highest ranking MCS bLock error rate BLER.
607 and the corresponding single current frequency spectrum of amendment single current MCS thresholdings is compared by the BLER and default BLER thresholdings
Efficiency.
608th, it is corresponding with revised single current spectrum efficiency by acquisition of tabling look-up according to revised single current spectrum efficiency
Single current MCS thresholdings.
In a particular application, after step 608, the above method may return to step 603 carry out section of lower a statistical time/
The judgement that whether single current MCS thresholdings adjust in preset time period.
609th, in step 605, if not sent under single current highest ranking MCS corresponding to the DwPTS in preset time period
Data volume, then judge whether sent data volume under double-current highest ranking MCS corresponding to the DwPTS in preset time period.
610th, in step 609, if being sent in preset time period under double-current highest ranking MCS corresponding to the DwPTS has
Data volume, then count double-current highest ranking MCS bLock error rate BLER.
Certainly, in step 609, if not sent under double-current highest ranking MCS corresponding to the DwPTS in preset time period
Data volume, then the current double-current MCS thresholdings of the DwPTS are not adjusted, and repeat to determine that the DwPTS is corresponding in preset time period
Single current highest ranking MCS under the step of whether having sent data volume, then return to step 603 carry out section of lower a statistical time/pre-
If the judgement that whether single current MCS thresholdings adjust in the period.
611st, the corresponding double-current frequency spectrum of the double-current MCS thresholdings of amendment is compared by the BLER and default BLER thresholdings to imitate
Rate.
612nd, obtained and revised double-current spectrum efficiency by default form according to revised double-current spectrum efficiency
Corresponding double-current MCS thresholdings.
In a particular application, after double-current MCS thresholdings are adjusted, repeatable return to step 603 carries out lower a statistical time
The judgement that whether single current MCS thresholdings adjust in section/preset time period.
In another enforceable mode, the DwPTS in preset time period can also be first judged in above-mentioned steps 605
Being sent under corresponding double-current highest ranking MCS has data volume, then counts double-current highest ranking MCS bLock error rate BLER, judges
After the completion of the step of carrying out the adjustment of double-current MCS thresholdings again, that is to say, that adjustment in the present embodiment to single current MCS thresholdings with
And the adjustment of double-current MCS thresholdings has no sequencing, the present embodiment does not limit its order.
Above-mentioned steps as a result of adaptive MCS thresholdings adjustment, so as to according to channel condition, carry out MCS
Thresholding adjusts, and improves the handling capacity of each user equipment, improves user equipment perceptibility.
More preferably clearly to illustrate the content of the step 503 in earlier figures 5 and the sub-step 5031 not shown in figure, with
Lower that amendment single current spectrum efficiency is described in detail using Fig. 7, Fig. 7 shows the flow of the spectrum efficiency modification method of single current
Schematic diagram, as shown in fig. 7, the spectrum efficiency modification method of the single current comprises the following steps：
Whether the 701st, judge to obtain is single current spectrum efficiency.
The step can be the sub-step of the step 503 in earlier figures 5.
702nd, if single current spectrum efficiency, it is determined that single current threshold value is single current BLER threshold values.
In the present embodiment, single current BLER threshold values and double-current BLER threshold values are pre-set.If single current frequency
Spectrum efficiency then judges compared with single current BLER threshold values, if double-current spectrum efficiency, is then carried out with double-current BLER threshold values
Multilevel iudge.
For example, if single current spectrum efficiency, then according to the BLER of the statistics of above-mentioned steps 606, above-mentioned BLER is passed through
Compared with BLER threshold values and judge whether the spectrum efficiency needs to correct, described in following steps.
703rd, the highest ranking MCS of single current BLER and the size of single current BLER threshold values are compared.
704th,, will be described current if single current highest ranking MCS BLER is less than single current BLER thresholdings in step 703
MCS thresholdings corresponding to spectrum efficiency increase the up-regulation amount of default spectrum efficiency, the spectrum efficiency corrected.
Specifically, being modified to single current spectrum efficiency EFF1 (spectrum efficiency corresponding to i.e. current MCS thresholdings), correct
Single current spectrum efficiency EFF1 '=EFF1+delteUP afterwards, wherein delteUP are single current spectrum efficiency after amendment relative to amendment
The incrementss of preceding single current spectrum efficiency, i.e., the up-regulation amount of the default spectrum efficiency in above-mentioned A02.
705th, in step 703, if single current highest ranking MCS BLER is more than single current BLER thresholdings, and judge pre- at this
If whether the special subframe data volume that highest ranking MCS is sent in the period is more than highest ranking MCS in a upper preset time period
The special subframe data volume of transmission.
If the 706th, in step 705, the special subframe data volume that highest ranking MCS is sent in the preset time period is more than upper one
The special subframe data volume that highest ranking MCS is sent in preset time period then makees spectrum efficiency corresponding to current MCS thresholdings
For the spectrum efficiency of amendment.
If the 707th, in step 705, the special subframe number of the highest ranking MCS transmissions of the DwPTS in the preset time period
The special subframe data volume sent according to highest ranking MCS of the amount no more than DwPTS described in previous predetermined period, then described it will work as
Spectrum efficiency corresponding to preceding MCS thresholdings reduces default spectrum efficiency, the spectrum efficiency corrected.
Specifically, being modified to single current spectrum efficiency EFF1 (spectrum efficiency corresponding to i.e. current MCS thresholdings), correct
Single current spectrum efficiency EFF1 '=EFF1-delteDOWN afterwards, wherein delteDOWN are that revised single current spectrum efficiency is relative
The downward amount of default spectrum efficiency in the decrement of single current spectrum efficiency before amendment, i.e. above-mentioned steps A03.
It will be appreciated that the spectrum efficiency modification method basic one of the spectrum efficiency modification method and single current for double fluid
Cause, specifically：
Whether judge to obtain is double-current spectrum efficiency, when being defined as double-current spectrum efficiency, it is determined that double-current threshold value is
Double-current BLER threshold values.
Compare double-current highest ranking MCS BLER and the size of double-current BLER threshold values, if double-current highest ranking MCS
BLER is less than double-current BLER thresholdings, then spectrum efficiency corresponding to the current MCS thresholdings is increased into default spectrum efficiency, obtained
To the spectrum efficiency of amendment.
If double-current highest ranking MCS BLER is more than BLER1 thresholdings, and judges double-current highest in the preset time period
Whether the special subframe data volume that grade MCS is sent is more than the special subframe that highest ranking MCS is sent in a upper preset time period
Data volume.
If the special subframe data volume that double-current highest ranking MCS is sent in preset time period is more than in a upper preset time period
The special subframe data volume that highest ranking MCS is sent is then using spectrum efficiency corresponding to current MCS thresholdings as the frequency spectrum corrected
Efficiency；Otherwise, spectrum efficiency corresponding to the current MCS thresholdings is reduced into default spectrum efficiency, the frequency spectrum corrected
Efficiency.
For example, double-current spectrum efficiency EFF1 is modified, revised spectrum efficiency EFF1 '=EFF1+delteUP,
Wherein delteUP is that spectrum efficiency is relative to the incrementss of spectrum efficiency before amendment after amendment, i.e., the default frequency in above-mentioned A02
The up-regulation amount of spectrum efficiency.
Double-current spectrum efficiency EFF2 is modified, revised spectrum efficiency EFF2 '=EFF2-delteDOWN, wherein
DelteDOWN is decrement of the revised spectrum efficiency relative to the spectrum efficiency before amendment, default in above-mentioned steps A03
Spectrum efficiency downward amount.
Above-mentioned steps improve the speed of drawing in the net of user equipment, and pass through judgement according to the network state of each user equipment
Adjust spectrum efficiency, improve user equipment it is good, in and it is poor three kinds in the case of downstream rate so that TD-LTE networks have more
It is competitive.
Fig. 8 shows the structural representation of the adjusting apparatus of MCS thresholdings provided in an embodiment of the present invention, as shown in figure 8, should
Device includes：First determining module 81, MCS send the second determining module 82 and MCS thresholdings adjusting module 83.
Wherein, the first determining module 81, for according to Modulation and Coding Scheme MCS doors current descending pilot frequency time slot DwPTS
Limit, determines spectrum efficiency corresponding to the current MCS thresholdings；
MCS sends the second determining module 82, for determining highest ranking MCS corresponding to the DwPTS in preset time period
Under whether sent data volume；
MCS thresholdings adjusting module 83, under highest ranking MCS corresponding to the DwPTS in the preset time period
When transmission has data volume, then according to the BLER of the highest ranking MCS, the MCS thresholdings of the DwPTS after acquisition adjustment.
For example, above-mentioned MCS thresholdings adjusting module 83, is specifically used for：
Do not send data volume under single current highest ranking MCS corresponding to the DwPTS in the preset time period, and determine
When transmission has data volume under double-current highest ranking MCS corresponding to the DwPTS in preset time period, then according to the double-current highest
Grade MCS BLER, obtain the double-current MCS thresholdings of the DwPTS after adjustment.
When not sending data volume under double-current highest ranking MCS corresponding to the DwPTS in the preset time period, then not
The current double-current MCS thresholdings of the DwPTS are adjusted, and make the second confirmation module continue to determine the DwPTS in preset time period
Whether data volume has been sent under corresponding highest ranking MCS.
Specifically also include in above-mentioned module, when MCS the thresholdings current DwPTS are single current MCS thresholdings, current
Spectrum efficiency corresponding to MCS thresholdings is single current spectrum efficiency, and highest ranking MCS corresponding to the DwPTS is single current highest ranking
The MCS thresholdings of DwPTS after MCS, and adjustment are the single current MCS thresholdings of the DwPTS after adjustment.
In the present embodiment, above-mentioned first determining module 81, is specifically used for,
According to the current MCS thresholdings of DwPTS, default form (such as upper table 3) is searched, obtains the current MCS thresholdings
Corresponding spectrum efficiency；
Wherein, the form is according to the spectrum efficiency that third generation partner program 3GPP agreements determine and MCS thresholdings
Corresponding form, as shown in upper table 3.
Above-mentioned MCS thresholdings adjusting module 83, including the module not shown in Fig. 8：Spectrum efficiency determining unit 831 and MCS
Thresholding amending unit 832.
Wherein, spectrum efficiency determining unit 831, for the BLER according to the highest ranking MCS, it is determined that the frequency spectrum of amendment
Efficiency；
For example, above-mentioned spectrum efficiency determining unit 831, is specifically used for：
When it is determined that highest ranking MCS BLER is less than default BLER thresholdings, by corresponding to the current MCS thresholdings
Spectrum efficiency increases the up-regulation amount of default spectrum efficiency, the spectrum efficiency corrected；
It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and transmission in the current preset period
Special subframe data volume be more than a upper preset time period in send special subframe data volume when, then by current MCS thresholdings
Spectrum efficiency of the corresponding spectrum efficiency as amendment；
It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and the spy in the current preset period
It is when different sub-frame data amount is less than the special subframe data volume in a upper preset time period, then the current MCS thresholdings is corresponding
Spectrum efficiency reduce the downward amount of default spectrum efficiency, the spectrum efficiency corrected.
MCS thresholdings amending unit 832, for the spectrum efficiency according to amendment, default form is searched, obtains the frequency of amendment
MCS thresholdings corresponding to spectrum efficiency, the MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment；
Wherein, the form is the spectrum efficiency form corresponding with MCS thresholdings determined according to 3GPP agreements, such as above-mentioned table
Shown in 3.
The adjusting apparatus of above-mentioned MCS thresholdings is provided in the device in base station.
Said apparatus improves the speed of drawing in the net of user equipment, and passes through judgement according to the network state of each user equipment
Adjust spectrum efficiency, improve user equipment it is good, in and it is poor three kinds in the case of downstream rate so that TD-LTE networks have more
It is competitive.
In a particular application, the present invention also provides a kind of base station, and the base station may include the MCS doors of foregoing any illustration
The adjusting apparatus of limit, the present embodiment by way of example only, can not limit other also included device/modules of base station.
In the specification of the present invention, numerous specific details are set forth.It is to be appreciated, however, that embodiments of the invention can be with
Put into practice in the case of these no details.In some instances, known method, structure and skill is not been shown in detail
Art, so as not to obscure the understanding of this description.
It will be appreciated by those of skill in the art that although some embodiments described herein include being wrapped in other embodiments
The some features rather than further feature included, but the combination of the feature of different embodiments mean in the scope of the present invention it
It is interior and form different embodiments.For example, in the following claims, embodiment claimed it is one of any
Mode it can use in any combination.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it all should cover among the claim of the present invention and the scope of specification.
Claims (15)
- A kind of 1. method of adjustment of MCS thresholdings, it is characterised in that including：According to the current Modulation and Coding Scheme MCS thresholdings of descending pilot frequency time slot DwPTS, determine that the current MCS thresholdings are corresponding Spectrum efficiency；Determine whether sent data volume under highest ranking MCS corresponding to the DwPTS in preset time period；If being sent in the preset time period under highest ranking MCS corresponding to the DwPTS has data volume, according to the highest Grade MCS BLER, obtain the MCS thresholdings of the DwPTS after adjustment.
- 2. according to the method for claim 1, it is characterised in that the MCS thresholding current according to DwPTS, it is determined that described Spectrum efficiency corresponding to current MCS thresholdings, including：According to the current MCS thresholdings of DwPTS, default form is searched, obtains frequency spectrum effect corresponding to the current MCS thresholdings Rate；Wherein, the form is that the spectrum efficiency determined according to third generation partner program 3GPP agreements is corresponding with MCS thresholdings Form.
- 3. method according to claim 1 or 2, it is characterised in that the BLER according to the highest ranking MCS, obtain The MCS thresholdings of the DwPTS after adjustment are taken, including：According to the BLER of the highest ranking MCS, it is determined that the spectrum efficiency of amendment；According to the spectrum efficiency of amendment, default form is searched, obtains MCS thresholdings corresponding to the spectrum efficiency of amendment；MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment；Wherein, the form is the spectrum efficiency form corresponding with MCS thresholdings determined according to 3GPP agreements.
- 4. according to the method for claim 3, it is characterised in that the BLER according to the highest ranking MCS, it is determined that repairing Positive spectrum efficiency, including：Determine whether highest ranking MCS BLER is less than default BLER thresholdings；If it is, spectrum efficiency corresponding to the current MCS thresholdings to be increased to the up-regulation amount of default spectrum efficiency, obtain The spectrum efficiency of amendment；Otherwise, it determines whether the special subframe data volume sent in the current preset period is more than or equal in a upper preset time period The special subframe data volume of transmission；If the special subframe data volume sent in the current preset period is more than the special son sent in a upper preset time period Frame data amount, then using spectrum efficiency corresponding to current MCS thresholdings as the spectrum efficiency corrected；If the special subframe data volume in the current preset period is less than the special subframe data volume in a upper preset time period, Spectrum efficiency corresponding to the current MCS thresholdings is then reduced to the downward amount of default spectrum efficiency, the frequency spectrum corrected Efficiency.
- 5. according to the method for claim 1, it is characterised in that if MCS the thresholdings current DwPTS are single current MCS doors Limit, then,Spectrum efficiency corresponding to current MCS thresholdings is single current spectrum efficiency, and highest ranking MCS corresponding to the DwPTS is single The MCS thresholdings for flowing the DwPTS after highest ranking MCS, and adjustment are the single current MCS thresholdings of the DwPTS after adjustment.
- 6. according to the method for claim 5, it is characterised in that if single corresponding to the DwPTS in the preset time period Data volume is not sent under stream highest ranking MCS, and methods described also includes：Determine whether sent data volume under double-current highest ranking MCS corresponding to the DwPTS in preset time period；If being sent in the preset time period under double-current highest ranking MCS corresponding to the DwPTS has data volume, according to Double-current highest ranking MCS BLER, obtain the double-current MCS thresholdings of the DwPTS after adjustment.
- 7. according to the method for claim 6, it is characterised in that if double corresponding to the DwPTS in the preset time period Data volume is not sent under stream highest ranking MCS, then does not adjust the current double-current MCS thresholdings of the DwPTS, and repeats to determine to preset The step of whether data volume having been sent in period under single current highest ranking MCS corresponding to the DwPTS.
- A kind of 8. adjusting apparatus of MCS thresholdings, it is characterised in that including：First determining module, for according to Modulation and Coding Scheme MCS thresholdings current descending pilot frequency time slot DwPTS, it is determined that described Spectrum efficiency corresponding to current MCS thresholdings；Second determining module, for determining whether sent number under highest ranking MCS corresponding to the DwPTS in preset time period According to amount；MCS thresholding adjusting modules, have for being sent under highest ranking MCS corresponding to the DwPTS in the preset time period During data volume, then according to the BLER of the highest ranking MCS, the MCS thresholdings of the DwPTS after acquisition adjustment.
- 9. device according to claim 8, it is characterised in that first determining module, be used for：According to the current MCS thresholdings of DwPTS, default form is searched, obtains frequency spectrum effect corresponding to the current MCS thresholdings Rate；Wherein, the form is that the spectrum efficiency determined according to third generation partner program 3GPP agreements is corresponding with MCS thresholdings Form.
- 10. device according to claim 8 or claim 9, it is characterised in that the MCS thresholdings adjusting module, including：Spectrum efficiency determining unit, for the BLER according to the highest ranking MCS, it is determined that the spectrum efficiency of amendment；MCS thresholding amending units, for the spectrum efficiency according to amendment, default form is searched, obtains the spectrum efficiency of amendment Corresponding MCS thresholdings, the MCS thresholdings using MCS thresholdings corresponding to the spectrum efficiency of amendment as the DwPTS after adjustment；Wherein, the form is the spectrum efficiency form corresponding with MCS thresholdings determined according to 3GPP agreements.
- 11. device according to claim 10, it is characterised in that the spectrum efficiency determining unit, be used for：When it is determined that highest ranking MCS BLER is less than default BLER thresholdings, by frequency spectrum corresponding to the current MCS thresholdings Efficiency increases the up-regulation amount of default spectrum efficiency, the spectrum efficiency corrected；It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and the spy sent in the current preset period It is when different sub-frame data amount is more than the special subframe data volume sent in a upper preset time period, then current MCS thresholdings is corresponding Spectrum efficiency as amendment spectrum efficiency；It is determined that highest ranking MCS BLER is more than or equal to default BLER thresholdings, and the special son in the current preset period When frame data amount is less than the special subframe data volume in a upper preset time period, then by frequency corresponding to the current MCS thresholdings Spectrum efficiency reduces the downward amount of default spectrum efficiency, the spectrum efficiency corrected.
- 12. device according to claim 8, it is characterised in that in MCS the thresholdings current DwPTS be single current MCS doors In limited time, spectrum efficiency corresponding to current MCS thresholdings is single current spectrum efficiency, and highest ranking MCS corresponding to the DwPTS is single The MCS thresholdings for flowing the DwPTS after highest ranking MCS, and adjustment are the single current MCS thresholdings of the DwPTS after adjustment.
- 13. device according to claim 12, it is characterised in that the MCS thresholdings adjusting module, be used for：Do not send data volume under single current highest ranking MCS corresponding to the DwPTS in the preset time period, and determine default When transmission has data volume under double-current highest ranking MCS corresponding to the DwPTS in period, then according to the double-current highest ranking MCS BLER, obtain the double-current MCS thresholdings of the DwPTS after adjustment.
- 14. device according to claim 13, it is characterised in that the MCS thresholdings adjusting module, be used for：When not sending data volume under double-current highest ranking MCS corresponding to the DwPTS in the preset time period, then do not adjust Double-current MCS the thresholdings current DwPTS.
- 15. a kind of base station, it is characterised in that include the adjustment dress of any described MCS thresholdings in the claims 8 to 14 Put.
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| CN110650501B (en) * | 2018-06-26 | 2022-03-18 | 中兴通讯股份有限公司 | Switching threshold adjusting method and device of session network |
| CN110086570B (en) * | 2019-04-08 | 2020-08-04 | 西安电子科技大学 | Modulation threshold adjusting method and device and computer equipment |
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