CN105229954B - A kind of method and device of link circuit self-adapting adjustment - Google Patents
A kind of method and device of link circuit self-adapting adjustment Download PDFInfo
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- CN105229954B CN105229954B CN201480000544.6A CN201480000544A CN105229954B CN 105229954 B CN105229954 B CN 105229954B CN 201480000544 A CN201480000544 A CN 201480000544A CN 105229954 B CN105229954 B CN 105229954B
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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
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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
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Abstract
The embodiment of the present invention provides a kind of method and device of link circuit self-adapting adjustment, the method of link circuit self-adapting adjustment is, it is first M subframe set by multiple sub-frame divisions in link, each sub-frame set in M subframe set includes at least one subframe, the target expectation of the control parameter adaptively adjusted and the control parameter is set separately for each sub-frame set in M subframe set, then link circuit self-adapting adjustment is carried out to each sub-frame set in M subframe set, so that the corresponding control parameter of each sub-frame set meets the target expectation of the control parameter after adjustment.The embodiment of the present invention can effectively improve system performance while enhancing link adaptation techniques control ability.
Description
Technical field
The present invention relates to the method and devices that the communications field more particularly to a kind of link circuit self-adapting adjust.
Background technique
With the rapid growth to wireless data service demand, mobile communications network needs to improve band utilization efficiency, with
Meet data transfer demands.In order to improve the availability of frequency spectrum, link adaptation techniques (Link Adaptation) become mobile logical
One of the key technology of letter system, the link adaptation techniques refer to the channel shape fed back by receiving end in communication network
State, the technology that the coding mode of transmitting terminal, modulation type and transmission power etc. are adaptively adjusted.
Existing link adaptation techniques are the target value that user sets a control parameter and control parameter, then basis
Difference between measured value (statistical value of certain time) and the target expectation of the control parameter, measuring signal is added with interference and is made an uproar
Acoustic ratio (Signal to Interference plus Noise Ratio, SINR), modulation coding scheme (Modulation
And Coding Scheme, MCS), send power etc. and carry out adaptive correction or adjustment, to make the measured value of control parameter
Converge to target value.
For example, Adaptive Modulation and Coding technology (Adaptive Modulation and Coding, AMC) is in order to make user
It is attained by ideal data transmission quality under various circumstances, the method that control user's Block Error Rate can be used.According to reality
A suitable block error probability desired value is arranged in channel quality and customer service situation, then by selecting suitable MCS, makes user
The measured value of Block Error Rate when carrying out data transmission converges to the target value of Block Error Rate, to realize that link circuit self-adapting adjusts.
During practical communication, due to the influence (such as interference factor) of many factors, the solution of different subframes will lead to
Tune ability is different, and the prior art can not be carried out effective link circuit self-adapting by subframe granularity, so as to cause link in part
The communication performance of frame declines, and reduces system performance.
Summary of the invention
The embodiment of the present invention provides a kind of method and device of link circuit self-adapting adjustment, can be improved system performance.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, providing a kind of base station, comprising:
Taxon, for being M subframe set by multiple sub-frame divisions in link, the chain route the base station with
Terminal device is established, and includes at least one subframe in each sub-frame set in the M subframe set, the M be greater than or
Integer equal to 2；
Setup unit, each sub-frame set difference in the M subframe set for being divided for the taxon
Set the target expectation of the control parameter and the control parameter that adaptively adjust；
Adjustment unit, each sub-frame set in the M subframe set for dividing to the taxon carry out
Link circuit self-adapting adjustment, so that the corresponding control parameter of each sub-frame set meets the target of the control parameter after adjustment
It is expected that.
With reference to first aspect, can be in realization mode at the first, the taxon is specifically used for, will be in the link
Multiple sub-frame divisions are interfering subframe set and noiseless sub-frame set；
Wherein, the interfering subframe set includes all subframes being disturbed in the multiple subframe, the noiseless son
Frame set includes all interference-free subframes in the multiple subframe.
With reference to first aspect, in second of achievable mode, the taxon is specifically used for, and wraps when in the link
It is the first sub-frame set, the second sub-frame set by multiple sub-frame divisions in the link when including detection reference signal SRS subframe
With third sub-frame set, the M is equal to 3；
Wherein, first sub-frame set includes all SRS subframe in the multiple subframe, second sub-frame set
Including first subframe after each SRS subframe in the multiple subframe, the third sub-frame set includes in the multiple subframe
All subframes other than first sub-frame set and second sub-frame set.
With reference to first aspect, the first to second achievable mode, the third can be in realization mode, the setup unit
It is specifically used for, Block Error Rate is set as to the control parameter of each sub-frame set；
Block error probability desired value is set as to the target value of the control parameter of each sub-frame set, each subframe collection
The block error probability desired value of conjunction is all the same.
Mode can be realized in conjunction with the third, in the 4th kind of achievable mode, the link is uplink,
The adjustment unit includes obtaining subelement, when the acquisition subelement is preset in the uplink for obtaining
Between in section in the M subframe set the first sub-frame set BLER statistic value；
According to the size relation of the BLER statistic value of first sub-frame set and the block error probability desired value, institute is obtained
State the modulation coding scheme MCS order of the first sub-frame set；
The adjustment unit further includes transmission sub-unit, and the transmission sub-unit is used to send uplink license to terminal device
Signaling, the uplink license signaling includes the MCS order, in order to which the terminal device uses the MCS order described
The uplink is established in first sub-frame set transmitting data, the terminal device and the base station.
Second aspect provides a kind of method of link circuit self-adapting adjustment, is used for base station, comprising:
It is M subframe set by multiple sub-frame divisions in link, the chain routes the base station and terminal device is established,
It include at least one subframe in each of the M subframe set sub-frame set, the M is whole more than or equal to 2
Number；
The control parameter adaptively adjusted and the control is set separately for each sub-frame set in the M subframe set
The target of parameter processed it is expected；
Link circuit self-adapting adjustment is carried out to each sub-frame set in the M subframe set, so that described every after adjustment
The corresponding control parameter of a sub-frame set meets the target expectation of the control parameter.
, can be in realization mode at the first in conjunction with second aspect, the M is equal to 2, and multiple subframes by link are drawn
Being divided into M subframe set includes:
It is interfering subframe set and noiseless sub-frame set by multiple sub-frame divisions in the link；
Wherein, the interfering subframe set includes all subframes being disturbed in the multiple subframe, the noiseless son
Frame set includes all interference-free subframes in the multiple subframe.
In conjunction with second aspect, in second of achievable mode, multiple sub-frame divisions by link are M subframe
Set includes:
It is the by multiple sub-frame divisions in the link in the link when including detection reference signal SRS subframe
One sub-frame set, the second sub-frame set and third sub-frame set, the M are equal to 3；
Wherein, first sub-frame set includes all SRS subframe in the multiple subframe, second sub-frame set
Including first subframe after each SRS subframe in the multiple subframe, the third sub-frame set includes in the multiple subframe
All subframes other than first sub-frame set and second sub-frame set.
In conjunction with second aspect, the first to second achievable mode can be in realization mode at the third, and described is the M
The target phase of the control parameter adaptively adjusted and the control parameter is set separately in each sub-frame set in a sub-frame set
Prestige includes:
Block Error Rate is set as to the control parameter of each sub-frame set；
Block error probability desired value is set as to the target expectation of the control parameter of each sub-frame set, each subframe
The block error probability desired value of set is all the same.
Mode can be realized in conjunction with the third, it is described to every in the M subframe set in the 4th kind of achievable mode
A sub-frame set carries out link circuit self-adapting adjustment
Obtain in the uplink Block Error Rate system of the first sub-frame set in the M subframe set in preset time period
Evaluation；
According to the size relation of the BLER statistic value of first sub-frame set and the block error probability desired value, institute is obtained
State the modulation coding scheme MCS order of the first sub-frame set；
Uplink is sent to terminal device and permits signaling, and the uplink license signaling includes the MCS order, in order to described
Terminal device using the MCS order in the first sub-frame set transmitting data, build with the base station by the terminal device
Found the uplink.
The method and device of link circuit self-adapting adjustment provided in an embodiment of the present invention, when carrying out link circuit self-adapting adjustment,
Multiple subframes in link are classified first, obtain multiple sub-frame sets, it is then adaptive for each sub-frame set setting
The target value of the control parameter and control parameter that should adjust, and link circuit self-adapting adjustment, phase are carried out respectively to each sub-frame set
Compared with the prior art, system performance can be effectively improved while enhancing link adaptation techniques control ability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of radio frames in LTE system provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of the method for link circuit self-adapting adjustment provided in an embodiment of the present invention；
Fig. 3 is the flow chart of the method for another link circuit self-adapting adjustment provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another base station provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is clearly retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
, it is specified that the minimum time of time domain in long term evolution (Long Term Evolution, LTE) system of the prior art
Unit is TS=1/ (15000 × 2048) s=32.55ns, wherein ns is microsecond, corresponds to the baseband sampling rate of 30.72MHz.
Physical layer uplink and downlink link is all using radio frames as interval in long term evolution (Long Term Evolution, LTE) system,
The length of one radio frames is TS=307200 × TS=10ms, wherein ms is millisecond.
For convenience of description, the radio frames with LTE frequency division duplex (Frequency Division Duplex, FDD) system are
Example is illustrated, and the radio frames that 10 milliseconds of each of LTE frequency division duplex system are divided into 20 time slots, each slot length Tslot=
15360×TS=0.5ms can will be continuous marked as the two of 2n and 2n+1 by time slot sequentially in time marked as 0~19
It is the integer for being less than or equal to 9 more than or equal to 0 that time slot, which forms subframe a n, n, and the length of each subframe is 1 millisecond, according to the time
Sequence can be by subframe marked as 0~9.
For FDD, the uplink and downlink link of LTE system can also be separated in frequency domain, so, each 10
The resource that can be used for downlink transfer and uplink in ms interval is all 10 subframes.The structure of the radio frames such as Fig. 1 institute
Show, the length of radio frames 01 is 10 milliseconds, and radio frames 01 include 20 numbers from 0~19 time slots, the time slot as shown in figure 1 03
Shown, the length of each time slot is 0.5 millisecond, and it is 1 millisecond that 20 time slots included by radio frames 01, which can form 10 length,
Subframe, for the subframe as shown in figure 1 shown in 02, each subframe includes two time slots.
During practical communication, due to the influence of many factors, the demodulation ability of different subframes is different, for example, by dry
The demodulation ability for disturbing subframe can be deteriorated.Existing link adaptation techniques do not account for the difference of different subframe demodulation abilities, show
Example, the control parameter of different subframes is identical with the target value of the control parameter in the prior art, is adaptively being adjusted
The convergence in the mean of all subframes of the control parameter in a link can only be made to target value when whole, but the control parameter is in difference
The actual value of subframe not necessarily converges to target value, therefore affects system performance.
The embodiment of the present invention provides a kind of method of link circuit self-adapting adjustment, as shown in Fig. 2, being used for base station, comprising:
Multiple sub-frame divisions in link are M subframe set by step 201, and chain routing base station is built with terminal device
Vertical, each sub-frame set in M subframe set includes at least one subframe, and M is the integer more than or equal to 2.
The uplink or downlink that the link is established between base station and terminal device, the uplink or downlink chain
It routes continuous frame to constitute, each frame is made of multiple continuous subframes, and exemplary, in LTE system, each frame is by 10 companies
Continuous subframe is constituted, therefore when carrying out link circuit self-adapting adjustment, base station can classify multiple subframes in the link,
M subframe set is obtained, M is the integer more than or equal to 2.
Step 202, the control parameter and control ginseng adaptively adjusted for each sub-frame set setting in M subframe set
Several target expectations.
When the control parameter adaptively adjusted includes the Block Error Rate of link, the bit error rate, average repeat time, average transmission
Prolong, one or combinations thereof in average spectral efficiency (ase) etc., control parameter is able to reflect the practical communication quality of link, practical application
In, control parameter is also possible that the other parameters of existing link circuit self-adapting adjustment, and it is not limited in the embodiment of the present invention.
Target expectation can be a specific value, for example, the target value that Block Error Rate can be set is 10%, optionally, target expectation
It is also possible to an optimization aim, for example, when the control parameter adaptively adjusted is the average spectral efficiency (ase) of data transmission, it should
The target expectation of control parameter may be such that average spectral efficiency (ase) reaches maximum under existing link-quality, optionally, target
It is expected that the desired combination of the target for being also possible to multiple control parameters, such as make under the premise of average repeat time is less than 1 time
It obtains average spectral efficiency (ase) and reaches maximum.
It is exemplary, when carrying out link circuit self-adapting adjustment, Block Error Rate can be set as the control parameter of each sub-frame set,
And it sets same or different block error probability desired value for each sub-frame set it is expected as the target of control parameter, Huo Zheshe
Determine the control parameter that mean transit delay is each sub-frame set, sets same or different mean transit delay target value and make
It is expected for the target of control parameter, average spectral efficiency (ase) can also be set as control parameter, set same or different average
Spectral efficiency values are target expectation of control parameter etc., are set in practical application according to specific requirement, the embodiment of the present invention
It does not limit this.
It should be noted that or different sub-frame sets the target of different control parameter and the control parameter is set
It is expected that the control parameter of for example, the first sub-frame set setting is Block Error Rate, the target of the control parameter is desired for as Block Error Rate
No more than 1%, the control parameter for the setting of the second sub-frame set is average spectral efficiency (ase), and the target of the control parameter is desired for putting down
Equal spectrum efficiency maximization etc..
Step 203 carries out link circuit self-adapting adjustment to each sub-frame set in M subframe set, so that every after adjustment
The corresponding control parameter of a sub-frame set meets the target expectation of control parameter.
It is expected according to the target of the control parameter of sub-frame set each in M subframe set and control parameter to each subframe
Set carries out link circuit self-adapting adjustment, for example, the Block Error Rate to the first sub-frame set is adaptively adjusted, the Block Error Rate of setting
Target be desired for 10%, then base station to the first sub-frame set carry out carry out link circuit self-adapting adjustment so that the first sub-frame set
Practical Block Error Rate converge to 10%.
When carrying out link circuit self-adapting adjustment, multiple subframes in link are first classified in base station, obtain more
A sub-frame set sets the target expectation of control parameter and control parameter for each sub-frame set, is then carrying out link certainly
When adapting to adjustment, link circuit self-adapting adjustment is carried out to each sub-frame set respectively, it can be in enhancing link adaptation techniques control
While ability processed, system performance is effectively improved.
Specifically, can be two sub-frame sets by multiple sub-frame divisions in link, respectively interfere when M is equal to 2
Sub-frame set and noiseless sub-frame set；Wherein, which includes all subframes being disturbed in multiple subframes, should
Noiseless sub-frame set includes all interference-free subframes in multiple subframes.
It is exemplary, when multiple subframes in link are classified, if base station anticipated that subframe be disturbed degree,
Or base station may determine that whether subframe is interfered, and interference whether can be received according to subframe by multiple subframes in link
It is divided into interfering subframe set and noiseless sub-frame set, for example, it is assumed that the first subframe is any one subframe in link, it is first
First base station judges whether the first subframe is to be disturbed subframe；If the first subframe is to be disturbed subframe, base station is by the first sub-frame division
Into interfering subframe set；If the first subframe is not to be disturbed subframe, base station is by the first sub-frame division to noiseless sub-frame set
In.It should be noted that judging whether the first subframe is when being disturbed subframe, which is also possible to certain a kind of certain interference,
Then judge whether the first subframe is the subframe interfered by such, if the first subframe is the subframe interfered by such, by the first son
Frame, which is divided into, to be received in interfering subframe set, if the first subframe is not the subframe interfered by such, by the first sub-frame division to without dry
Disturb sub-frame set.Optionally, when the subframe in link can also classify according to the degree difference that is disturbed of subframe, Ke Yifen
To be disturbed the stronger sub-frame set of degree and being disturbed the weaker sub-frame set of degree, journey can also be disturbed according to different
Degree is divided into multiple sub-frame sets, and it is not limited in the embodiment of the present invention.
Exemplary, there is also detection reference signal (Sounding Reference in the uplink of LTE system
Signal, SRS) subframe, since the last one data symbol in SRS subframe is used to carry reference signal and number cannot be transmitted
According to, therefore the equivalent code rate of the subframe transmitting data is caused to improve, each subframe includes multiple data symbols, since terminal is set
When for being switched to SRS symbol from data symbol during data transmission, the power that there are maximum 40 microseconds is allowed to switch
The phase is spent, to affect the demodulation performance of the subframe including SRS symbol, the demodulation ability of the subframe is caused further to be deteriorated, is wrapped
The subframe for including SRS symbol is known as SRS subframe.Likewise, since terminal device is switched in data transmission procedure from SRS symbol
When data symbol, there is also the power of maximum 40 microseconds to switch the excessive phase, to affect the latter subframe of SRS subframe in link
First data symbol demodulation ability so that the whole demodulation ability of the latter subframe of SRS subframe is also poor in link,
The latter subframe of SRS subframe is first subframe in uplink after SRS subframe.When in link there are when SRS subframe, can be with
It is multiple sub-frame sets in the link by all sub-frame divisions for including, it is exemplary, it is the by multiple sub-frame divisions in link
One sub-frame set, the second sub-frame set and third sub-frame set, M are equal to 3；Wherein, the first sub-frame set includes in multiple subframes
All SRS subframe, the second sub-frame set includes first subframe in multiple subframes after each SRS subframe, third subframe collection
It closes including all subframes in multiple subframes other than the first sub-frame set and the second sub-frame set.In practical application, examining
When considering SRS subframe demodulation ability influences, it can also be divided according to other classification standards, the embodiment of the present invention does not do this
It limits.
Specifically, judging the type of the first subframe, the first subframe is any one subframe in multiple subframes；When the first son
When frame is SRS subframe, by the first sub-frame division into the first sub-frame set；When the first subframe is not SRS subframe, first is judged
Subframe whether be SRS subframe latter subframe；If the first subframe is the latter subframe of SRS subframe, by the first sub-frame division to the
Two sub-frame sets；If the first subframe is not the latter subframe of SRS subframe, by the first sub-frame division to third sub-frame set.
It should be noted that the method classified to the subframe in link is varied, it can be according to tool in practical application
Body situation is set, and classification method provided in an embodiment of the present invention is merely illustrative, and is not done to specific classification method
It limits.
Specifically, link circuit self-adapting adjustment can be and adaptively be adjusted to uplink, it is also possible to downlink chain
Road is adaptively adjusted, exemplary, can be with when the uplink established to base station and terminal device is adaptively adjusted
The control parameter that Block Error Rate is adaptively adjusted as each sub-frame set is set, sets block error probability desired value as each subframe collection
The target of the control parameter of conjunction it is expected, and the block error probability desired value of each sub-frame set is all the same.
When the adaptive control parameter of M subframe set setting is Block Error Rate, and the target of control parameter is desired for
When identical block error probability desired value, base station can carry out link circuit self-adapting adjustment for different sub-frame sets respectively.It is exemplary,
Base station can adaptively adjust the first sub-frame set, and the first sub-frame set is any one subframe in M subframe set
Set, first in the available uplink in base station in preset time period in M subframe set the first sub-frame set Block Error Rate
Statistical value obtains the first son then according to the BLER statistic value of the first sub-frame set and the size relation of block error probability desired value
The MCS order of frame set, and send uplink to terminal device and signaling, the uplink is permitted to permit that signaling includes the MCS order, so as to
Uplink is established in the first sub-frame set transmitting data, the terminal device and base station using the MCS order in terminal device.
Optionally, when the BLER statistic value of the first sub-frame set obtained when base station is greater than block error probability desired value, base station
The MCS of the first sub-frame set can be obtained according to the BLER statistic value of the first sub-frame set and the difference of block error probability desired value
Then order sends uplink to terminal device and signaling, the uplink is permitted to permit that signaling includes the MCS order, which connects
After receiving uplink license signaling, the MCS order is obtained, and using the MCS order in the first sub-frame set transmitting data, when
Terminal device selects the MCS order in the first sub-frame set transmitting data, can reduce the Block Error Rate of the first sub-frame set,
So that the Block Error Rate of the first sub-frame set converges to block error probability desired value；When the Block Error Rate system for the first sub-frame set that base station obtains
When evaluation is less than block error probability desired value, base station can be according to the BLER statistic value of the first sub-frame set and block error probability desired value
Difference obtains the MCS order of the first sub-frame set, then sends uplink to terminal device and signaling, the uplink is permitted to permit signaling
Including the MCS order, after which receives uplink license signaling, the MCS order is obtained, and use the MCS order
In the first sub-frame set transmitting data, when terminal device selects the MCS order in the first sub-frame set transmitting data, energy
Enough increase the Block Error Rate of the first sub-frame set, so that the Block Error Rate of the first sub-frame set converges to block error probability desired value.Actually answer
In, base station can also obtain uplink according to the BLER statistic value of the first sub-frame set and the difference of block error probability desired value
Then the correction amount of the SINR on road obtains the first sub-frame set according to the correction amount of the average SINR of uplink and SINR
MCS order, the specific process that adjusts is the prior art, and this will not be repeated here for the embodiment of the present invention.
The embodiment of the present invention is only illustrated for controlling Block Error Rate, in practical application, additionally it is possible to set other controls
The target of parameter and other control parameters it is expected, and then realizes and adjust to the link circuit self-adapting that different sub-frame sets carries out, this
Inventive embodiments do not repeat this.Method of adjustment is merely illustrative in the present embodiment, in practical application, is joined according to different control
Several and the control parameter target expectation can also be adjusted using other suitable existing adaptive techniques, and the present invention is implemented
Example does not repeat this.
It should be noted that the technical solution of the embodiment of the present invention can be applied to various communication systems, and such as: the whole world is moved
Dynamic communication (Global System of Mobile communication, GSM) system, CDMA (Code Division
Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple
Access, WCDMA) it system, General Packet Radio Service (General Packet Radio Service, GPRS), drills for a long time
Into (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system
System, LTE time division duplex (Time Division Duplex, TDD), Universal Mobile Communication System (Universal Mobile
Telecommunication System, UMTS), global interconnection inserting of microwave (Worldwide Interoperability
For Microwave Access, WiMAX) communication system etc., the embodiment of the present invention is said by taking LTE frequency division duplex system as an example
It is bright, do not limit the application range of technical solution of the present invention.
The method of link circuit self-adapting adjustment provided in an embodiment of the present invention first will when carrying out link circuit self-adapting adjustment
Multiple subframes in link are classified, and multiple sub-frame sets are obtained, and then set control parameter for each sub-frame set
Target expectation, and link circuit self-adapting adjustment is carried out respectively to each sub-frame set, in enhancing link adaptation techniques control ability
While, effectively improve system performance.
The embodiment of the present invention provides a kind of method of link circuit self-adapting adjustment, as shown in figure 3, being used for base station, the present invention is real
It applies official holiday and sets M=2, i.e., be two sub-frame sets by multiple sub-frame divisions in link, the method for the link circuit self-adapting adjustment
Include:
Multiple sub-frame divisions in link are two sub-frame sets by step 301, respectively interfering subframe set and without dry
Disturb sub-frame set.
The link is the uplink that base station and terminal device are established, and when carrying out link circuit self-adapting adjustment, base station can be with
It according to the different demarcation of demodulation ability is two sub-frame sets, respectively interfering subframe set by subframes multiple in the uplink
With noiseless sub-frame set, in practical application base station anticipated that subframe be interfered degree or base station may determine that
Whether subframe is interfered, wherein interfering subframe set includes all subframes being disturbed, nothing in multiple subframes in uplink
Interfering subframe set includes all interference-free subframes in multiple subframes in uplink.It is exemplary, it is assumed that the first subframe is
Any one subframe in all subframes first determines whether the first subframe is to be disturbed subframe；If the first subframe is to be disturbed
Subframe, by the first sub-frame division into interfering subframe set；If the first subframe is not to be disturbed subframe, the first sub-frame division is arrived
In noiseless sub-frame set.
The target expectation of step 302, the control parameter and control parameter that are adaptively adjusted for the setting of interfering subframe set.
Since the subframe in interfering subframe set is different from the demodulation ability of subframe in noiseless sub-frame set,
Carry out link circuit self-adapting adjustment when, need respectively interfering subframe set and noiseless sub-frame set be set separately control parameter and
The target of control parameter it is expected that in practical application there are many control parameters, the embodiment of the present invention is illustrated by taking Block Error Rate as an example,
The present embodiment can be referred to for other control parameters, this is not repeated.It is exemplary, Block Error Rate can be set as interfering subframe
The control parameter of set sets the first block error probability desired value and it is expected as the target of the control parameter, and the first block error probability desired value is
The block error probability desired value of interfering subframe set.
The target expectation of step 303, the control parameter and control parameter that are adaptively adjusted for the setting of noiseless sub-frame set.
It is exemplary, Block Error Rate can be set as the control parameter of noiseless sub-frame set, set the second block error probability desired value
It is expected that the second block error probability desired value is the block error probability desired value of noiseless sub-frame set, this second for the target of the control parameter
Block error probability desired value can be identical as the first block error probability desired value, can also be different.
It should be noted that in practical application the control parameter of interfering subframe set and noiseless sub-frame set control parameter
Can be different, the control parameter of for example, interfering subframe set setting is Block Error Rate, and the target of the control parameter is desired for as accidentally
Block rate is not more than 1%, and the control parameter for the setting of noiseless sub-frame set is average spectral efficiency (ase), the target phase of the control parameter
Hope to be average spectral efficiency (ase) maximization etc..
The embodiment of the present invention is assumed to be interfering subframe set and noiseless sub-frame set sets identical control parameter and control
The target of parameter processed it is expected, carries out so that interfering subframe set and noiseless sub-frame set set identical block error probability desired value as an example
Illustrate, i.e., the first block error probability desired value is identical as the second block error probability desired value.
Step 304 carries out link circuit self-adapting adjustment to interfering subframe set, so that the control of interfering subframe set adjusted
Parameter processed meets the target expectation of the control parameter.
Exemplary, when carrying out link circuit self-adapting adjustment to interfering subframe set, base station obtains pre- in uplink first
If the BLER statistic value of subframe included by interfering subframe set in the period, then according to the Block Error Rate of interfering subframe set
The size relation of statistical value and block error probability desired value obtains the MCS order of interfering subframe set, and sends uplink to terminal device
Signaling, the uplink is permitted to permit that signaling includes the MCS order, in order to which terminal device uses the MCS order in interfering subframe collection
Transmitting data is closed, which is used to establish uplink with base station.
Specifically, when the BLER statistic value of the interfering subframe set of base station acquisition is greater than block error probability desired value, base station
The SINR of interfering subframe set can be obtained according to the BLER statistic value of interfering subframe set and the difference of block error probability desired value
Correction amount obtains the MCS order of interfering subframe set, then to terminal device then according to average SINR and SINR correction amount
Send uplink and permit signaling, uplink license signaling includes the MCS order, the terminal device receive uplink license signaling it
Afterwards, the MCS order is obtained, and using the MCS order in interfering subframe set transmitting data, when terminal device selects the MCS
Order can reduce the Block Error Rate of interfering subframe set in interfering subframe set transmitting data, so that interfering subframe set
Block Error Rate converge to block error probability desired value；When the BLER statistic value for the interfering subframe set that base station obtains is less than Block Error Rate mesh
When scale value, base station can obtain interference according to the BLER statistic value of interfering subframe set and the difference of block error probability desired value
The SINR correction amount of frame set obtains the MCS order of interfering subframe set then according to average SINR and SINR correction amount, and
Sending uplink to terminal device permits signaling, the uplink to permit that signaling includes the MCS order, which receives uplink and permitted
The MCS order can be obtained, and using the MCS order in interfering subframe set transmitting data, when terminal device selects after signaling
The MCS order is selected in interfering subframe set transmitting data, is capable of increasing the Block Error Rate of interfering subframe set, so that interference
The Block Error Rate of frame set converges to block error probability desired value.The acquisition process of average SINR and SINR correction amount is the prior art,
This will not be repeated here for the embodiment of the present invention.
Step 305 carries out link circuit self-adapting adjustment to noiseless sub-frame set, so that the control of noiseless sub-frame set is joined
Number meets the target expectation of the control parameter.
Likewise, being preset in acquisition uplink first when carrying out link circuit self-adapting adjustment to noiseless sub-frame set
The BLER statistic value of subframe included by noiseless sub-frame set in period, then according to the BLER statistic value and accidentally block
The size relation of rate target value obtains the MCS order of noiseless sub-frame set, and sends uplink to terminal device and permit signaling,
The uplink permits that signaling includes the MCS order, in order to which terminal device is transmitted in noiseless sub-frame set using the MCS order
Data.
Specifically, when the BLER statistic value of the noiseless sub-frame set of base station acquisition is greater than block error probability desired value, base
Noiseless sub-frame set can be obtained according to the BLER statistic value of noiseless sub-frame set and the difference of block error probability desired value by standing
SINR correction amount obtain the MCS order of noiseless sub-frame set then according to average SINR and SINR correction amount, then to
Terminal device sends uplink and permits that signaling, uplink license signaling include the MCS order, which receives uplink license
After signaling, the MCS order is obtained, and using the MCS order in noiseless sub-frame set transmitting data, when terminal device selects
The MCS order is selected in noiseless sub-frame set transmitting data, the Block Error Rate of noiseless sub-frame set can be reduced, so that nothing
The Block Error Rate of interfering subframe set converges to block error probability desired value；When the BLER statistic for the noiseless sub-frame set that base station obtains
When value is less than block error probability desired value, base station can be according to the BLER statistic value of noiseless sub-frame set and block error probability desired value
Difference obtains the SINR correction amount of noiseless sub-frame set, then according to average SINR and SINR correction amount, obtains noiseless son
The MCS order of frame set, and send uplink to terminal device and signaling, the uplink is permitted to permit that signaling includes the MCS order, the end
After end equipment receives uplink license signaling, the MCS order is obtained, and using the MCS order in noiseless sub-frame set
Data are transmitted, when terminal device selects the MCS order in noiseless sub-frame set transmitting data, are capable of increasing noiseless son
The Block Error Rate of frame set, so that the Block Error Rate of noiseless sub-frame set converges to block error probability desired value.Average SINR and SINR is repaired
The acquisition process of positive quantity is the prior art, and this will not be repeated here for the embodiment of the present invention.
The embodiment of the present invention is interfering subframe set and the identical block error probability desired value of noiseless sub-frame set setting, and right
Two sub-frame sets carry out link circuit self-adapting adjustment respectively, it is ensured that the BLER statistic value of subframe can converge in link
Identical block error probability desired value.
It should be noted that the sequencing of the step of link circuit self-adapting method of adjustment provided in an embodiment of the present invention can be into
Row appropriate adjustment, step according to circumstances can also accordingly be increased and decreased, exemplary, step 302 and step 303 in the present embodiment
Tandem can be exchanged, the tandem of step 304 and step 305 can also be exchanged, any to be familiar with this skill
In the technical scope disclosed by the present invention, the method that can readily occur in variation should all cover in this hair the technical staff in art field
Within bright protection scope, therefore repeat no more.
The method of link circuit self-adapting adjustment provided in an embodiment of the present invention first will when carrying out link circuit self-adapting adjustment
Multiple subframes in link are classified to obtain two sub-frame sets, respectively interfering subframe set and noiseless sub-frame set,
Then be set separately the target expectation of control parameter and control parameter for two sub-frame sets, and to two sub-frame sets respectively into
Line link adaptively adjusts, and while enhancing link adaptation techniques control ability, effectively improves system performance.
The embodiment of the present invention provides a kind of base station 40, as shown in Figure 4, comprising:
Taxon 401, for being M subframe set by multiple sub-frame divisions in link, which routes base station and end
End equipment is established, and each sub-frame set in M subframe set includes at least one subframe, and M is the integer more than or equal to 2.
The uplink or downlink that the link is established between base station 40 and terminal device are carrying out link circuit self-adapting
When adjustment, the taxon 401 of base station 40 can classify subframe each in link, obtain M subframe set, M is big
In or equal to 2 integer.
Setup unit 402, each sub-frame set in M subframe set for dividing for taxon 401 are set respectively
The target of the fixed control parameter adaptively adjusted and the control parameter it is expected.
When the control parameter adaptively adjusted includes the Block Error Rate of link, the bit error rate, average repeat time, average transmission
Prolong, one or combinations thereof in average spectral efficiency (ase) etc., control parameter can control the practical communication quality of link.Practical application
In, control parameter is also possible that the other parameters of link circuit self-adapting adjustment technology, and it is not limited in the embodiment of the present invention.Mesh
Mark expectation can be a specific value, for example, the target that Block Error Rate can be set is desired for 10%, optionally, target expectation
It is also possible to an optimization aim, for example, when the control parameter adaptively adjusted is the average spectral efficiency (ase) of data transmission, it should
The target expectation of control parameter may be such that average spectral efficiency (ase) reaches maximum under existing link-quality, optionally, target
It is expected that the desired combination of the target for being also possible to multiple control parameters, such as make under the premise of average repeat time is less than 1 time
It obtains average spectral efficiency (ase) and reaches maximum.
Exemplary, when carrying out link circuit self-adapting adjustment, setup unit 402 can set Block Error Rate as each sub-frame set
Control parameter, and set same or different block error probability desired value as the target phase for the Block Error Rate of each sub-frame set
It hopes, or sets mean transit delay as the control parameter of each sub-frame set, when setting same or different average transmission
The target for prolonging target value as control parameter it is expected, can also set average spectral efficiency (ase) as control parameter, setting it is identical or
Different average spectral efficiency (ase) values is target expectation of control parameter etc., is set in practical application according to specific requirement, this
Inventive embodiments do not limit this.It should be noted that or different sub-frame sets be arranged different control parameter and
The target of the control parameter it is expected that the control parameter of for example, the first sub-frame set setting is Block Error Rate, the mesh of the control parameter
The control parameter that mark is desired for as Block Error Rate no more than 1%, for the setting of the second sub-frame set is average spectral efficiency (ase), control ginseng
Several targets is desired for average spectral efficiency (ase) maximization etc..
Adjustment unit 403, each sub-frame set in the M subframe set for dividing to taxon 401 carry out chain
Road adaptively adjusts, so that the corresponding control parameter of each sub-frame set meets the target expectation of control parameter after adjustment.
Specifically, adjustment unit 403 it is expected according to the control parameter of each sub-frame set and the target of control parameter to every
A sub-frame set carries out link circuit self-adapting adjustment, for example, the Block Error Rate to the first sub-frame set is adaptively adjusted, setting
The target of Block Error Rate is desired for 10%, then adjustment unit 403 carries out the first sub-frame set to carry out link circuit self-adapting adjustment, so that
The practical Block Error Rate of first sub-frame set converges to 10%.
When carrying out link circuit self-adapting adjustment, taxon first classifies multiple subframes in link, obtains
To multiple sub-frame sets, then setup unit is the target expectation that each sub-frame set sets control parameter and control parameter,
Adjustment unit carries out link circuit self-adapting adjustment to each sub-frame set respectively, in enhancing link adaptation techniques control ability
Meanwhile effectively improving system performance.
It is exemplary, if base station 40 anticipated that subframe be disturbed whether situation or base station 40 can prejudge out subframe
It is interfered, when multiple subframes in link are classified, sub-frame divisions multiple in link can be by taxon 401
Interfering subframe set and noiseless sub-frame set；Wherein, interfering subframe set includes all subframes being disturbed in multiple subframes,
Noiseless sub-frame set includes all interference-free subframes in multiple subframes.
Exemplary, there is also SRS subframe in the uplink of LTE system, due to the last one data in SRS subframe
Symbol is used to carry reference signal and cannot transmit data, therefore the equivalent code rate of the subframe transmitting data is caused to improve, from
And the demodulation performance of the subframe including SRS symbol is affected, cause the demodulation ability of the subframe to be further deteriorated, carries with reference to letter
Number data symbol be known as SRS symbol, the subframe including SRS symbol is known as SRS subframe.Therefore, when there are SRS subframe in link
When, it can be multiple sub-frame sets in the link by all sub-frame divisions for including, exemplary, taxon 401 can also be used
In, by multiple sub-frame divisions in link be the first sub-frame set, the second sub-frame set and third sub-frame set, M be equal to 3；Its
In, the first sub-frame set includes all SRS subframe in multiple subframes, and the second sub-frame set includes each SRS in multiple subframes
First subframe after subframe, third sub-frame set include in multiple subframes in addition to the first sub-frame set and the second sub-frame set it
Outer all subframes.It, can also be by uplink according to other when considering that SRS subframe demodulation ability influences in practical application
Classification standard divided, it is not limited in the embodiment of the present invention.
It should be noted that the method classified to the subframe in link is varied, it can be according to tool in practical application
Body situation is set, and classification method provided in an embodiment of the present invention is merely illustrative, and is not done to specific classification method
It limits.
Specifically, link circuit self-adapting adjustment can be and adaptively be adjusted to uplink, it is also possible to downlink chain
Road is adaptively adjusted, exemplary, when the uplink established to base station and terminal device is adaptively adjusted, setting
Unit 402 can set the control parameter that Block Error Rate is adaptively adjusted as each sub-frame set, set block error probability desired value
Target for the control parameter of each sub-frame set it is expected, and the block error probability desired value of each sub-frame set is all the same.
Specifically, base station 40 can be the control parameter and the control of each sub-frame set setting according to setup unit 402
The target of parameter it is expected, carries out adaptive uplink adjustment respectively to each sub-frame set, exemplary, to the first sub-frame set
It is adaptively adjusted, the first sub-frame set is any one sub-frame set in M subframe set, as shown in figure 5, base station 40 is also
Including acquiring unit 404, for obtaining the BLER statistic value of the first sub-frame set in preset time period in uplink, then
According to the BLER statistic value of the first sub-frame set and the size relation of block error probability desired value, the MCS of the first sub-frame set is obtained
Order, base station 40 further include transmission unit 405, permit that signaling, uplink license signaling include for sending uplink to terminal device
The MCS order, so that terminal device is using the MCS order in the first sub-frame set transmitting data, the terminal device and base station
Establish uplink.
Optionally, the BLER statistic value of the first sub-frame set obtained when acquiring unit 404 is greater than block error probability desired value
When, which obtains the first son according to the BLER statistic value of the first sub-frame set and the difference of block error probability desired value
Then the MCS order of frame set sends uplink to terminal device by transmission unit 405 and signaling, the uplink is permitted to permit signaling
Including the MCS order, which uses the MCS order in the first sub-frame set transmitting data, when terminal device selects
The MCS order can reduce the Block Error Rate of the first sub-frame set in the first sub-frame set transmitting data, so that the first subframe
The Block Error Rate of set converges to block error probability desired value；When the BLER statistic value for the first sub-frame set that acquiring unit 404 obtains
When less than block error probability desired value, the acquiring unit 404 is according to the BLER statistic value and block error probability desired value of the first sub-frame set
Difference, obtain the first sub-frame set MCS order, then by transmission unit 405 to terminal device send uplink license letter
It enables, uplink license signaling includes the MCS order, which transmits number in the first sub-frame set using the MCS order
According to being capable of increasing the mistake of the first sub-frame set when terminal device selects the MCS order in the first sub-frame set transmitting data
Block rate, so that the Block Error Rate of the first sub-frame set converges to block error probability desired value.
The embodiment of the present invention is only illustrated for controlling Block Error Rate, in practical application, additionally it is possible to set other controls
The target of parameter and other control parameters it is expected, and then realizes and adjust to the link circuit self-adapting that different sub-frame sets carries out, this
Inventive embodiments do not repeat this.The method of adjustment of adjustment unit 403 is merely illustrative in the present embodiment, in practical application, root
It can also be carried out using other suitable existing adaptive techniques according to the target expectation of different control parameter and the control parameter
Adjustment, the embodiment of the present invention do not repeat this.
It should be noted that the taxon in the present embodiment can be base station processor, also can integrate in base station
It is realized in some processor, in addition it is also possible to be stored in the form of program code in the memory of base station, by certain of base station
One processor calls and executes the function of the above taxon.The realization of setup unit is similar to taxon, and can be with
Taxon integrates, and can also independently realize, the realization of adjustment unit is similar to setup unit.Processing described here
Device can be central processing unit (Central Processing Unit, CPU) or specific integrated circuit
(Application Specific Integrated Circuit, ASIC), or be arranged to implement the embodiment of the present invention
One or more integrated circuits.
Base station in the embodiment of the present invention with for the evolved base station (evolved NodeB, eNB) in LTE system into
Row explanation, is also possible to other base stations with link circuit self-adapting modulation function, it is not limited in the embodiment of the present invention.
Base station provided in an embodiment of the present invention, when carrying out link circuit self-adapting adjustment, taxon first is by the son of link
Frame is classified, and multiple sub-frame sets are obtained, and then setup unit is the control that each sub-frame set sets self adaptive control
Parameter and control parameter target expectation, and link circuit self-adapting tune is carried out respectively to each sub-frame set by adjusting unit
It is whole, compared to the prior art, while enhancing link adaptation techniques control ability, effectively improve system performance.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
, can be with reference to the corresponding process in embodiment of the method with the specific work process of unit, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that the independent physics of each unit includes, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. a kind of base station characterized by comprising
Taxon, for being M subframe set by multiple sub-frame divisions in link, the chain routes the base station and terminal
Equipment is established, and each sub-frame set in the M subframe set includes at least one subframe, and the M is more than or equal to 2
Integer；
Setup unit, each sub-frame set in the M subframe set for dividing for the taxon are set separately
The target of the control parameter and the control parameter that adaptively adjust it is expected；
Adjustment unit, each sub-frame set in the M subframe set for dividing to the taxon carry out link
Adaptive adjustment, so that the corresponding control parameter of each sub-frame set meets the target phase of the control parameter after adjustment
It hopes；
Wherein, the taxon is specifically used for, when in the link including detection reference signal SRS subframe, by the chain
Multiple sub-frame divisions in road are the first sub-frame set, the second sub-frame set and third sub-frame set, and the M is equal to 3；Wherein,
First sub-frame set includes all SRS subframe in the multiple subframe, and second sub-frame set includes the multiple
First subframe after each SRS subframe in subframe, the third sub-frame set include in the multiple subframe in addition to described first
All subframes except sub-frame set and second sub-frame set.
2. base station according to claim 1, which is characterized in that
The setup unit is specifically used for, and Block Error Rate is set as to the control parameter of each sub-frame set；
Block error probability desired value is set as to the target expectation of the control parameter of each sub-frame set, each sub-frame set
Block error probability desired value it is all the same.
3. base station according to claim 2, which is characterized in that the link is uplink,
The base station further includes acquiring unit, and the acquiring unit is used to obtain described in preset time period in the uplink
The BLER statistic value of first sub-frame set in M subframe set；
According to the size relation of the BLER statistic value of first sub-frame set and the block error probability desired value, described the is obtained
The modulation coding scheme MCS order of one sub-frame set；
The base station further includes transmission unit, and the transmission unit, which is used to send uplink to the terminal device, permits signaling, institute
Stating uplink license signaling includes the MCS order, in order to which the terminal device uses the MCS order in first subframe
Gather transmitting data, the uplink is established in the terminal device and the base station.
4. a kind of method of link circuit self-adapting adjustment, is used for base station characterized by comprising
It is M subframe set by multiple sub-frame divisions in link, the chain routes the base station and terminal device is established, described
Each sub-frame set in M subframe set includes at least one subframe, and the M is the integer more than or equal to 2；
The control parameter adaptively adjusted and control ginseng is set separately for each sub-frame set in the M subframe set
Several target expectations；
Link circuit self-adapting adjustment is carried out to each sub-frame set in the M subframe set, so that every height after adjustment
The corresponding control parameter of frame set meets the target expectation of the control parameter；
Wherein, multiple sub-frame divisions by link be M subframe set include: when in the link include detection reference
It is the first sub-frame set, the second sub-frame set and third subframe by multiple sub-frame divisions in the link when signal SRS subframe
Set, the M are equal to 3；Wherein, first sub-frame set includes all SRS subframe in the multiple subframe, and described second
Sub-frame set includes that first subframe, the third sub-frame set include described more after each SRS subframe in the multiple subframe
All subframes in a subframe other than first sub-frame set and second sub-frame set.
5. according to the method described in claim 4, it is characterized in that, each subframe collection in the M subframe set
The control parameter adaptively adjusted is set separately in conjunction and the target expectation of the control parameter includes:
Block Error Rate is set as to the control parameter of each sub-frame set；
Block error probability desired value is set as to the target expectation of the control parameter of each sub-frame set, each sub-frame set
Block error probability desired value it is all the same.
6. according to the method described in claim 5, it is characterized in that, the link be uplink, it is described to the M subframe
Each sub-frame set in set carries out link circuit self-adapting adjustment
Obtain in the uplink BLER statistic of the first sub-frame set in the M subframe set in preset time period
Value；
According to the size relation of the BLER statistic value of first sub-frame set and the block error probability desired value, described the is obtained
The modulation coding scheme MCS order of one sub-frame set；
Uplink is sent to the terminal device and permits signaling, and the uplink license signaling includes the MCS order, in order to described
Terminal device using the MCS order in the first sub-frame set transmitting data, build with the base station by the terminal device
Found the uplink.
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| PCT/CN2014/074210 WO2015143672A1 (en) | 2014-03-27 | 2014-03-27 | Link adaptive adjustment method and apparatus |
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| CN101489184B (en) * | 2008-01-14 | 2010-12-08 | 华为技术有限公司 | Method, apparatus and system for differentiating intra-district sub-frame state |
| WO2013020200A1 (en) * | 2011-08-08 | 2013-02-14 | Research In Motion Limited | Method and system for uplink interference management in heterogeneous cellular networks |
| CN108306673B (en) * | 2012-04-27 | 2021-09-24 | 北京三星通信技术研究有限公司 | HARQ-ACK information transmission method |
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| CN102281638A (en) * | 2011-08-02 | 2011-12-14 | 电信科学技术研究院 | Method and equipment for scheduling slot |
| CN103327594A (en) * | 2012-03-22 | 2013-09-25 | 电信科学技术研究院 | Uplink power control method, equipment and system |
| CN103428717A (en) * | 2012-05-18 | 2013-12-04 | 电信科学技术研究院 | Method, system and device for measuring configuring channel and uplink channel |
| CN103475442A (en) * | 2012-06-06 | 2013-12-25 | 中兴通讯股份有限公司 | Adaptive modulation and coding AMC method and device |
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