CN110471286A - Link circuit self-adapting adjusts system, method, apparatus and base station - Google Patents
Link circuit self-adapting adjusts system, method, apparatus and base station Download PDFInfo
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- CN110471286A CN110471286A CN201910790493.6A CN201910790493A CN110471286A CN 110471286 A CN110471286 A CN 110471286A CN 201910790493 A CN201910790493 A CN 201910790493A CN 110471286 A CN110471286 A CN 110471286A
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
Abstract
This application involves a kind of link circuit self-adapting adjustment system, method, apparatus and base stations.Wherein, in link circuit self-adapting adjustment system, AMC feedback controller handles CSI information according to control target, using closed loop control algorithm, obtains feedback control output as a result, and transmitting feedback control output result to executive device；AMC feedforward controller uses feedforward compensation algorithm process interference information, obtains feedforward control output as a result, and exporting result to executive device transmission feedforward control；Executive device is transmitted to the wireless channel of terminal by antenna port for based on feedback control output result and feedforward control output result, the link circuit self-adapting parameter of determination and Resource Allocation Formula.The application realizes the AMC self adaptive control based on feed-forward and feedback, reduces link circuit self-adapting adjustment time, and under the conditions of meeting different channels, user is to transmission rate and transmission stability requirement.
Description
Technical field
This application involves wireless communication technology fields, adjust system, method, apparatus more particularly to a kind of link circuit self-adapting
The base station and.
Background technique
Raising with people to wireless network performance and data rate requirement, next generation mobile communication system need more
Small time delay, bigger power system capacity, higher data rate and more inexpensive.However in wireless environments, terminal (UE,
User Equipment), relative motion or only slight change of transmission medium etc. between reflector and scatterer
Factor may all produce bigger effect wireless channel, due to wireless channel time-varying characteristics and fading characteristic, what terminal received
Signal quality is also to change as radio channel state changes, and how to effectively utilize the variability of wireless channel, how
Improve data transfer rate to the maximum extent on limited broadband, to improve band utilization efficiency to the maximum extent, gradually at
For mobile communication research hotspot.Link adaptation techniques have just because of in terms of improve data transfer rate and frequency efficiency
Very strong advantage, thus as one of current and key technology of future mobile communication system.
Link adaptation techniques just refer to the channel information that base station (BS, Base Station) basis currently obtains, adaptive
Adjust base station BS configured transmission behavior with answering is influenced to overcome or adapt to present channel variation bring.Link circuit self-adapting
Technical principle is base station BS in the case where comprehensively considering the factors such as wireless channel conditions, receiving end UE feature, dynamic adjustment modulation, coding
Format (transformat) and transmission power guarantee that the bit error rate (BLER) is no more than 10%.The introducing of link adaptation techniques, so that
The modulation of higher code rate, higher-order can be distributed close to the user of cell base station BS.And for close to cell boarder user,
Then distribution has the modulation of the lower-order compared with low bit- rate, i.e. link adaptation techniques allow according to channel condition to different user point
With different data rates.
From the basic principle of link adaptation techniques can be seen that link adaptation techniques mainly include two in terms of content:
On the one hand it is the acquisition of channel information, accurately and effectively obtains present channel environmental parameter, and which type of channel used
Indicate that parameter can more effectively and accurately react the situation of channel；It on the other hand is the adjustment of configured transmission, including
The adjustment of the parameters such as debud mode, coding mode, redundancy, transmission power and running time-frequency resource.
Under normal conditions, link adaptation techniques mainly include following several technologies: (1) adaptive modulation and coding technology
(AMC, Adaptive Modulation and Coding).Change the modulation system of adjustment base station BS transmission according to wireless channel
And code rate improves modulation levels and code rate when channel condition is preferable, when channel condition is poor
It waits, reduces modulation levels and channel coding rate.(2) power control techniques adjust base station BS according to the variation of wireless channel
Transmission power reduces transmission power when channel condition is relatively good, when channel condition is poor, improves transmitting
Power.(3) hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat reQuest), by adjusting data biography
Defeated redundancy is realized to the small dynamic range of channel, accurate, fast to obtain re-transmission/merging gain in terminal UE
Fast is adaptive；(4) channel selectivity dispatching technique, according to wireless channel measurement as a result, selection channel condition it is relatively good when
Frequency resource carries out data transmission.
AMC is combined with mixed automatic retransfer (HARQ) technology to reach better link circuit self-adapting effect, this
HSDPA (High Speed Downlink Packet Access, high-speed slender body theory) is widely applied；So exist
During realization, inventor find traditional technology at least there are the following problems: tradition greatly mostly use feedback controling mode come into
Line link self adaptive control, however based on the AMC of feedback control there are inertia lag characteristic, this process lag will certainly shadow
Ring link circuit self-adapting adjustment effect.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of chain that can fast implement link circuit self-adapting control
Road self-adapted adjustment system, method, apparatus and base station.
To achieve the goals above, on the one hand, the embodiment of the invention provides a kind of link circuit self-adaptings to adjust system, including
CSI channel-detecting device, AMC feedback controller, CSI interference measurement device, AMC feedforward controller and executive device；Wherein:
CSI channel-detecting device obtains the CSI information that terminal reports, and CSI information is transferred to AMC feedback controller；
AMC feedback controller handles CSI information according to control target, using closed loop control algorithm, and it is defeated to obtain feedback control
Out as a result, and exporting result to executive device transmission feedback control；
CSI interference measurement device obtains the interference information that terminal reports, and interference information is transferred to AMC feedforward control
Device；
AMC feedforward controller uses feedforward compensation algorithm process interference information, obtains feedforward control output as a result, and to holding
Luggage sets transmission feedforward control output result；
Executive device will export result, the link circuit self-adapting parameter of determination based on feedback control output result and feedforward control
And Resource Allocation Formula, the wireless channel of terminal is transmitted to by antenna port.
AMC feedforward controller is PI controller or p-type controller in one of the embodiments,；Interference information includes disturbing
Momentum；It includes compensation rate that feedforward control, which exports result,；
AMC feedforward controller obtains interfering channel model, wireless channel model, CSI Air conduct measurement dress by abstract respectively
Set model, feedback controller model, feedforward controller model and executive device model；
AMC feedforward controller is using disturbance quantity as input quantity, using closed loop transfer function, processing interfering channel model, wirelessly
Channel model, CSI channel-detecting device model, feedback controller model, feedforward controller model and executive device model, obtain
To output quantity.
AMC feedforward controller transmits letter using following closed loop using disturbance quantity as input quantity in one of the embodiments,
Number obtains output quantity:
If D (s) is 0:
Wherein, Y (s) is output quantity, and D (s) is disturbance quantity, and H (s) is CSI channel-detecting device model, GaIt (s) is execution
Mounted cast, G (s) are wireless channel model, GfIt (s) is feedforward controller model, GcIt (s) is feedback controller model, Gd(s)
For interfering channel model, GfFor feedforward controller transfer function.
Control target includes BLER and downlink transmission rate in one of the embodiments,；AMC feedback controller is PI control
Device processed or p-type controller；
AMC feedback controller obtains wireless channel model, CSI channel-detecting device model, feedback control by abstract respectively
Device model and executive device model processed；
AMC feedback controller will control target as input quantity, using closed loop transfer function, handle wireless channel model,
CSI channel-detecting device model, feedback controller model and executive device model, obtain output quantity.
AMC feedback controller is obtained according to control target using following closed loop transfer function, in one of the embodiments,
Output quantity:
Wherein, Y (s) is output quantity, and X (s) is input quantity, and H (s) is CSI channel-detecting device model, GaIt (s) is execution
Mounted cast, G (s) are wireless channel model, GcIt (s) is feedback controller model.
CSI information includes CQI information in one of the embodiments,；It includes MCS value and coding that feedback control, which exports result,
Format；
AMC feedback controller be based on CQI information, mapped using corresponding algorithm after table look-up, obtain current spectral benefit
Use efficiency；
AMC feedback controller carries out Integral Processing to a preceding spectrum utilization efficiency and current spectral utilization efficiency, obtains
Final spectrum utilization efficiency；
AMC feedback controller maps final spectrum utilization efficiency, obtains MCS value and coded format.
On the other hand, the embodiment of the invention also provides a kind of link circuit self-adapting methods of adjustment, comprising steps of
The feedback control for receiving the transmission of AMC feedback controller exports result；Feedback control output result is passed through by CSI information
AMC feedback controller handles to obtain according to control target, using closed loop control algorithm；The CSI information that CSI information is reported by terminal
AMC feedback controller is transferred to through CSI channel-detecting device；
The feedforward control for receiving the transmission of AMC feedforward controller exports result；Feedforward control output result is passed through by interference information
AMC feedforward controller is obtained using feedforward compensation algorithm process；Interference information is interfered through CSI by the interference information that terminal reports and is surveyed
Amount device is transferred to AMC feedforward controller；
It will be based on feedback control output result and feedforward control output result, the link circuit self-adapting parameter of determination and resource point
With scheme, the wireless channel of terminal is transmitted to by antenna port.
A kind of link circuit self-adapting adjustment device, comprising:
Feedback reception module, the feedback control for receiving the transmission of AMC feedback controller export result；Feedback control output
As a result it handles to obtain according to control target, using closed loop control algorithm through AMC feedback controller by CSI information；CSI information is by end
The CSI information reported is held to be transferred to AMC feedback controller through CSI channel-detecting device；
Feedover receiving module, and the feedforward control for receiving the transmission of AMC feedforward controller exports result；Feedforward control output
As a result it is obtained through AMC feedforward controller using feedforward compensation algorithm process by interference information；Interference information is reported dry by terminal
It disturbs information and is transferred to AMC feedforward controller through CSI interference measurement device；
Physical layer transmission module, for the chain of result and feedforward control output result, determination will to be exported based on feedback control
Road auto-adaptive parameter and Resource Allocation Formula are transmitted to the wireless channel of terminal by antenna port.
A kind of base station, including any one of aforementioned link circuit self-adapting adjust system.
Base station applies are in 5G NR system in one of the embodiments,.
Base station is for configuring CSI-RS parameter, CSI-IM parameter and CSI parameter in one of the embodiments,；
Base station CSI-RS parameter, CSI-IM parameter are handed down to terminal；CSI-RS parameter is used to indicate terminal measurement channel
Quality, and report CSI information；CSI-IM parameter is used to indicate terminal measurement channel disturbance, and reports interference information.
A kind of computer readable storage medium is stored thereon with computer program, when computer program is executed by processor
The step of realizing any of the above-described link circuit self-adapting method of adjustment.
A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:
Feedforward control in conjunction with feedback control, can be eliminated quickly because interfering bring variations, be mentioned by the application
The stability of system is risen；Specifically, being based on CSI channel-detecting device, AMC feedback controller, CSI interference measurement device, AMC
The coordinateds such as feedforward controller and executive device, so as to can be realized the AMC based on feed-forward and feedback self-adaptive controlled by the application
System, and then solve based on feedback control AMC technology inertia lag characteristic, while solving inclined based on feedforward control AMC technology
Difference controls problem out of control, reaches setting value so as to quick, accurate control transmission rate, and meet constraint condition, gives different letters
User distributes different rates under road quality requirements, guarantees the stability and rapidity of data transmission, the user experience is improved.This
Application can theoretically completely eliminate the influence interfered to system, can be by being based on deviation for the influence in addition to interference
Feedback control eliminated.The application reduces link circuit self-adapting adjustment time, and under the conditions of meeting different channels, user is to biography
Defeated rate and transmission stability requirement.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is that link circuit self-adapting adjusts system structure diagram in one embodiment；
Fig. 2 is the Controlling model schematic diagram that link circuit self-adapting adjusts system in one embodiment；
Fig. 3 is the flow diagram for the link circuit self-adapting method of adjustment implemented in one embodiment from executive device angle；
Fig. 4 is the structural block diagram that the link circuit self-adapting implemented in one embodiment from executive device angle adjusts device；
Fig. 5 is the structural block diagram for dispatching side in one embodiment in link circuit self-adapting adjustment system.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
Traditional technology majority is lacked both for link circuit self-adapting control, this method is carried out using feedback controling mode
Point is when disturbance occurs in channel, and terminal UE is actively or passive feedback channel communications quality condition, base station BS can just adjust
The modulation system and coding mode of transmission, or even will appear and require to occur repeatedly adjusting situation because meeting BLER, this process is stagnant
Property certainly will will affect user's use afterwards.For example, traditional technology proposes the adaptive regulation method based on interference control, but it is only strong
A kind of Open-loop compensation control method has been adjusted, can not solve the problems, such as hysteresis quality.
And the application proposes to realize that AMC dynamic adjusts, and feedforward and feedback control is had using feedforward and feedback control technology
Effect combines, and reduces link circuit self-adapting adjustment time, and under the conditions of meeting different channels, user is steady to transmission rate and transmission
Qualitative requirement.Further, the time delay that channel quality constantly changes lower link circuit self-adapting (AMC) is reduced, user experience is improved,
Lifting system performance.
Link circuit self-adapting provided by the present application adjusts system, can be applied in 5G NR (New Radio, newly eat dishes without rice or wine) system.
5G NR system introduces the CSI (Channel State Information, channel state information) based on interference measurement, and originally
Application proposes to can use feedforward control compensation variations because of caused by interference in AMC control.Wherein, 5G NR
It in system, is communicated between terminal UE and base station BS by radio open, radio open is also referred to as wireless link channel or wireless communication
Road.Further, terminal can be, but not limited to be various personal computers, laptop, smart phone, tablet computer and just
Formula wearable device is taken, base station can be realized with the cluster of base stations of the either multiple base station compositions in independent base station.
In one embodiment, as shown in Figure 1, providing a kind of link circuit self-adapting adjustment system, including CSI Air conduct measurement
Device, AMC feedback controller, CSI interference measurement device, AMC feedforward controller and executive device；Wherein:
CSI channel-detecting device obtains the CSI information that terminal reports, and CSI information is transferred to AMC feedback controller；
AMC feedback controller handles CSI information according to control target, using closed loop control algorithm, and it is defeated to obtain feedback control
Out as a result, and exporting result to executive device transmission feedback control；
CSI interference measurement device obtains the interference information that terminal reports, and interference information is transferred to AMC feedforward control
Device；
AMC feedforward controller uses feedforward compensation algorithm process interference information, obtains feedforward control output as a result, and to holding
Luggage sets transmission feedforward control output result；
Executive device will export result, the link circuit self-adapting parameter of determination based on feedback control output result and feedforward control
And Resource Allocation Formula, the wireless channel of terminal is transmitted to by antenna port.
Specifically, the given value (namely input quantity) in Fig. 1 can refer to that transmission rate is wanted under that condition that the constraint conditions are met
It asks, i.e. control target.For example, control target is when BLER is less than 10%, downlink transmission rate reaches 800M requirement.In Fig. 1,
× indicate node aggregation ,-indicate negative-feedback ,+indicate positive feedback.
In addition, CSI channel-detecting device refers to base station BS by sending CSI-RS and CSI with confidence to downlink in Fig. 1
Breath, terminal UE measure down channel quality situation, result are then reported to base station BS by CSI channel-detecting device, wherein
Most importantly CQI information.
CSI interference measurement device refers to base station BS by configuring the measurement of CSI information relevant interference, and terminal UE measurement interference is logical
Road measurement feedback gives AMC feedforward control device.
Wireless channel model refers to the wireless link channel between base station BS and terminal UE, also referred to as radio open.
And in Fig. 1, executive device can refer to that physical layer receives MAC layer AMC feedback controller and AMC feedforward controller
Adjustment as a result, being emitted to eating dishes without rice or wine by antenna port.Further, eating dishes without rice or wine to send is some radio waves.Executive device can
According to output result (i.e. the feedback control output result, feedforward control output knot of AMC feedback controller and AMC feedforward controller
Fruit), by data by a series of process such as scrambling, modulation, layer mapping, precoding, resource impact, and then by the data of base station
It sends.
AMC feedback controller can be applied to base station, so that base station BS is obtained in terminal UE by CSI channel-detecting device
The down channel quality state (can be CSI information, be CQI value in a specific example) of report；Further, AMC is anti-
Presenting controller can pass through according to CQI (Channel Quality Indicator, channel quality instruction) value that terminal UE reports
Filtering algorithm obtains output MCS (Modulation and Coding Scheme, modulation and the coding plan of AMC feedback controller
Slightly) value and coded format.
It should be noted that if not interfering with, then not needing to use Front feedback control, as long as with AMC feedback controller
The problem of just can solve link circuit self-adapting.But in practical applications, channel quality is constantly subjected to interference, if before being not added
Feedback, then AMC feedback controller will constantly go to adjust, and there is also time lags for the adjustment of AMC feedback controller.For this purpose, this Shen
It please propose the control strategy for being aided with AMC feedforward control based on AMC feedback control.
In a specific example, AMC feedback controller can be applied to MAC (the Media Access of base station
Control, media access control) layer, for example, framework AMC feedback control unit, and it is carried out by AMC control scheduling unit
Control in timing (AMC control scheduling unit can be the virtual module that angle framework is realized from code).
In a specific embodiment, CSI information may include CQI information；Feedback control exports result
MCS value and coded format；
AMC feedback controller be based on CQI information, mapped using corresponding algorithm after table look-up, obtain current spectral benefit
Use efficiency；
AMC feedback controller carries out Integral Processing to a preceding spectrum utilization efficiency and current spectral utilization efficiency, obtains
Final spectrum utilization efficiency；
AMC feedback controller maps final spectrum utilization efficiency, obtains MCS value and coded format.
Specifically, AMC feedback control unit is mainly completed to receive the CSI information that terminal UE reports, mainly CQI letter
Breath, is mapped to efficiency Efficency value (spectrum utilization efficiency), utilizes current and last time Efficency using integral way
Value calculates final Efficency value, is then mapped to MCS Index and coding mode.Meanwhile utilizing HARQ information, meter
Calculate whether BLER meets the requirements.
It should be noted that the feedback controller in traditional technology, usually according to system controlled variable and given value it
Between deviation work, deviation is the foundation of control, and control system will achieve the purpose that reduce or eliminate deviation.But it is simple
This control mode, it is generally existing and there are hysteresis qualitys；In addition, according to feedback control AMC adaptive technique, channel matter
Amount constantly changes because of interference, when discovery deviation between adjustment AMC feedback control parameters may having time delay it is live, into
When row feedback control parameters adjust, great changes will take place for meeting again for actual channel quality, and often interferes and cause, such AMC tune
Obviously there is hysteresis in whole result.And the application proposes that feedback control is combined with feedforward control, and then passes through feedback
Control realizes that AMC dynamic adjusts in conjunction with feedforward control, is able to solve based on feedback control AMC technology inertia lag characteristic.
Further, it should be noted that CSI channel-detecting device can get the CSI value that terminal reports, and CSI value has 4
Bit is used to refer to CQI, and CQI can be looked for by tabling look-up to obtain an efficiency value (Efficency value) by this efficiency value
To MCS value and coding mode.Executive device just can know that how to go the data block that will be transmitted point more by MCS value and coding mode
(i.e. TBS, Transport Block Size) one piece big and send so how many RB resource (Resource of more TBS data needs
Block), after having divided will a series of process such as scrambled, modulation, layer mapping, precoding, resource impact by the number of base station
According to sending.
In a specific embodiment, control target may include BLER and downlink transmission rate；AMC feedback controller
For PI controller or p-type controller；
AMC feedback controller obtains wireless channel model, CSI channel-detecting device model, feedback control by abstract respectively
Device model and executive device model processed；
AMC feedback controller will control target as input quantity, using closed loop transfer function, handle wireless channel model,
CSI channel-detecting device model, feedback controller model and executive device model, obtain output quantity.
Further, in a specific embodiment, AMC feedback controller is according to control target, using following closed loop
Transmission function obtains output quantity:
Wherein, Y (s) is output quantity, and X (s) is input quantity, and H (s) is CSI channel-detecting device model, GaIt (s) is execution
Mounted cast, G (s) are wireless channel model, GcIt (s) is feedback controller model.
Specifically, Y (s) is output quantity in ssystem transfer function model as shown in Figure 2, X (s) is input quantity, H (s)
For CSI channel-detecting device model, GaIt (s) is executive device model, G (s) is wireless channel model, GcIt (s) is feedback controller
Model (namely AMC feedback controller model).Meanwhile in Fig. 2, × indicate node aggregation ,-indicate negative-feedback ,+indicate positive and negative
Feedback.
Closed loop transfer function, of the input quantity X (s) to controlled volume Y (s) are as follows:
Wherein, controlled volume Y (s) namely output quantity, it will be appreciated that be transmission rate；Each model being related in the application,
It can be the model abstracted.And Gc(s) it can be the controller for needing to design, PI (Proportional generally can be used
Integral Controller) controller or directly use p-type controller, it is of course possible to other control algolithms.
AMC feedforward controller refers to that compensation is influenced because of variations caused by channel disturbance, can quickly and completely can
Compensation interference, principle is worked according to the size of disturbance quantity, and disturbance is the foundation of control, substantially opened loop control system
System.I.e. according to feedforward control AMC adaptive technique, actually opened loop control process, when control object characteristic changes
And when deviation being caused to occur, feedforward control AMC adaptive technique can not solve.And the application proposes feedback control and feedforward control
It combines, and then realizes that AMC dynamic adjusts in conjunction with feedforward control by feedback control, and then solve based on feedforward control
AMC Technique deviation controls problem out of control.
In a specific example, AMC feedforward controller can be applied to the MAC layer of base station, for example, before framework AMC
Present control unit, and by AMC control scheduling unit it is carried out in timing control (AMC control scheduling unit can be from generation
Code realizes the virtual module of angle framework).
Wherein, AMC feedforward control unit is mainly completed to receive the interference measurement results that terminal UE reports, before static state
Control technology is presented, compensation rate is calculated, interference is fully compensated.Further, the static feed forward control techniques in the application are to use
It compensates the compensation that can only be realized in stable state to disturbance, is designed for stable state principle of invariance.Hereafter, AMC control is adjusted
Spending unit can determine according to feedforward controller (i.e. AMC feedforward control unit) and feedback controller (i.e. AMC feedback control unit)
The parameter and Resource Allocation Formula of the link circuit self-adapting AMC of selection, and link circuit self-adapting parameter and Resource Allocation Formula are notified
Link circuit self-adapting AMC executive device.Wherein, executive device can be applied to the physical layer of base station.
In a specific embodiment, AMC feedforward controller is PI controller or p-type controller；Interference information includes
Disturbance quantity；It includes compensation rate that feedforward control, which exports result,；
AMC feedforward controller obtains interfering channel model, wireless channel model, CSI Air conduct measurement dress by abstract respectively
Set model, feedback controller model, feedforward controller model and executive device model；
AMC feedforward controller is using disturbance quantity as input quantity, using closed loop transfer function, processing interfering channel model, wirelessly
Channel model, CSI channel-detecting device model, feedback controller model, feedforward controller model and executive device model, obtain
To output quantity.
Specifically, interference information is disturbance quantity in a specific example；It is compensation that feedforward control, which exports result,
Amount.
Further, in a specific embodiment, AMC feedforward controller is using disturbance quantity as input quantity, use with
Lower closed loop transfer function, obtains output quantity:
If D (s) is 0:
Wherein, Y (s) is output quantity, and D (s) is disturbance quantity, and H (s) is CSI channel-detecting device model, GaIt (s) is execution
Mounted cast, G (s) are wireless channel model, GfIt (s) is feedforward controller model, GcIt (s) is feedback controller model, Gd(s)
For interfering channel model, GfFor feedforward controller transfer function.
Specifically, Y (s) is output quantity in ssystem transfer function model as shown in Figure 2, D (s) is disturbance quantity, H (s)
For CSI channel-detecting device model, GaIt (s) is executive device model, G (s) is wireless channel model, GfIt (s) is feedforward controller
Model, GcIt (s) is feedback controller model, GdIt (s) is interfering channel model；
Interfere D (s) to the closed loop transfer function, of controlled volume Y (s) are as follows:
In order to completely eliminate interference, enabling D (s) is 0, then
And GfFor feedforward controller transfer function；I.e. the parameter of feedforward controller can be according to interfering channel model and executing dress
Model is set to adjust；Meanwhile the effect of the feedforward controller transfer function is for offsetting because of interference bring variation, Ke Yili
Solution is controlled at auxiliary.Wherein, the parameter of feedforward controller can refer to polynomial coefficient, if with PID (Proportion
Integral Differential) if algorithm, it is necessary to adjust respective parameter；Further, according to static state feedforward control
Technology processed, then GfFor a constant.
More than, in the base station of application the application link circuit self-adapting adjustment system, can be carried out using following process adaptive
Adjustment: first step BS issues CSI-RS/CSI-IM reference signal, and UE measures channel quality and channel by CSI-RS/CSI-IM
Interference.Second step UE reports CSI and CSI-IM.Third step, repeats the first and secondth step, and BS is controlled using adjusting feedback with feedforward
The parameter of device processed, i.e. BS need to report value by the CSI for obtaining t the and t-1 moment to adjust feedback and feedforward controller parameter；Its
In, feedback control is to do control errors, and feedforward control can be understood as open loop.
Specifically, the application link circuit self-adapting adjustment system need to be pre-configured with following ginseng for being applied to 5G NR system
Number:
(1) configure 5G NR system CSI-RS (Channel State Information-Reference Signal,
Channel state information reference signals) parameter.CSI-RS parameter uses NZP-CSI-RS-Resource (Non-Zero Power
Channel State Information-Reference Signal resource, the reference of non-zero power channel state information
Signal resource), it can be configured to periodical/semi-continuous CSI-RS, may also be configured to aperiodic CSI-RS, collocation channel detection reference
The time domain and frequency domain resource of signal.This is configured to the ginseng that CSI Air conduct measurement unit (i.e. CSI channel-detecting device) reports CSI
Examine signal.
(2) CSI-IM (the Channel State Information-Interference of 5G NR system is configured
Measurement, channel state information interference measurement) parameter.Configure CSI-IM-Resource, CSI-IM-ResourceSet
Information configures the time domain and frequency domain resource of interference measurement reference signal, and for CSI interference measurement unit, (i.e. CSI interference measurement is filled
Set) interference measurement.
(3) the CSI parameter of 5G NR system is configured.Configuration CSI parameter CSI report quantity, reporting types can be the period,
It is aperiodic with it is semi-continuous, report the associated CSI-RS resource Id of CSI, be associated with CSI-IM resource Id, CSI reports code book type, CSI
Corresponding ascending resource and BWP (portions of bandwidth, Bandwidth part) ID are reported, code book relevant information is reported.CSI is reported to believe
Breath may include CSI information and interference information.
In above-mentioned link circuit self-adapting adjustment system, by feedforward control in conjunction with feedback control, can quickly it eliminate because of interference fringe
The variations come, improve the stability of system；Specifically, based on CSI channel-detecting device, AMC feedback controller,
The coordinateds such as CSI interference measurement device, AMC feedforward controller and executive device, so that the application can be realized before being based on
The AMC self adaptive control of feedback-feedback, and then solve based on feedback control AMC technology inertia lag characteristic, while solving base
Problem out of control is controlled in feedforward control AMC Technique deviation, reaches setting value so as to quick, accurate control transmission rate, and full
Sufficient constraint condition distributes different rates to user under different channels quality requirements, guarantees the stability and quickly of data transmission
Property, the user experience is improved.The application can theoretically completely eliminate the influence interfered to system, in addition to interference
It influences, can be eliminated by the feedback control based on deviation.The application reduces link circuit self-adapting adjustment time, to meet difference
Under channel condition, user is to transmission rate and transmission stability requirement.
Further, channel conditions constantly change, base station need to constantly adjust MCS and modulation system meet transmission rate and
Transmission error rates requirement.And MCS and modulation system can be quickly adjusted using the application, properties of product will be greatly promoted, are had wide
Wealthy application prospect.
In one embodiment, as shown in figure 3, providing a kind of link circuit self-adapting method of adjustment, it is applied in this way
For executive device in Fig. 1, it may comprise steps of:
Step S310, the feedback control for receiving the transmission of AMC feedback controller export result；Feedback control export result by
CSI information handles to obtain through AMC feedback controller according to control target, using closed loop control algorithm；CSI information is reported by terminal
CSI information be transferred to AMC feedback controller through CSI channel-detecting device；
Step S320, the feedforward control for receiving the transmission of AMC feedforward controller export result；Feedforward control exports result by doing
It disturbs information and is obtained through AMC feedforward controller using feedforward compensation algorithm process；Interference information is passed through by the interference information that terminal reports
CSI interference measurement device is transferred to AMC feedforward controller；
Step S330 will be joined based on the link circuit self-adapting of feedback control output result and feedforward control output result, determination
Several and Resource Allocation Formula, the wireless channel of terminal is transmitted to by antenna port.
Specifically, after executive device receives the adjustment result of MAC layer AMC feedback controller and AMC feedforward controller,
Emitted by antenna port to eating dishes without rice or wine.And the workflow of AMC feedback controller, AMC feedforward controller, it can be refering to institute above
It states, details are not described herein again.
Further, executive device can obtain the link circuit self-adapting parameter and resource allocation of AMC control scheduling unit transmission
Scheme；And by AMC control scheduling unit according to feedforward compensation controller and feedback controller, to determine the link circuit self-adapting of selection
The parameter and Resource Allocation Formula of AMC.
It should be understood that although each step in the flow chart of Fig. 3 is successively shown according to the instruction of arrow, this
A little steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly state otherwise herein, these steps
It executes there is no the limitation of stringent sequence, these steps can execute in other order.Moreover, at least part in Fig. 3
Step may include that perhaps these sub-steps of multiple stages or stage are executed in synchronization to multiple sub-steps
It completes, but can execute at different times, the execution sequence in these sub-steps or stage, which is also not necessarily, successively to be carried out,
But it can be executed in turn or alternately at least part of the sub-step or stage of other steps or other steps.
In one embodiment, as shown in figure 4, providing a kind of link circuit self-adapting adjustment device, comprising:
Feedback reception module 410, the feedback control for receiving the transmission of AMC feedback controller export result；Feedback control
Output result is handled to obtain through AMC feedback controller by CSI information according to control target, using closed loop control algorithm；CSI information
The CSI information reported by terminal is transferred to AMC feedback controller through CSI channel-detecting device；
Feedover receiving module 420, and the feedforward control for receiving the transmission of AMC feedforward controller exports result；Feedforward control
Output result is obtained through AMC feedforward controller using feedforward compensation algorithm process by interference information；Interference information is reported by terminal
Interference information be transferred to AMC feedforward controller through CSI interference measurement device；
Physical layer transmission module 430, for result and feedforward control output result, determination will to be exported based on feedback control
Link circuit self-adapting parameter and Resource Allocation Formula are transmitted to the wireless channel of terminal by antenna port.
Specific restriction about link circuit self-adapting adjustment device may refer to above for link circuit self-adapting method of adjustment
Restriction, details are not described herein.Modules in above-mentioned link circuit self-adapting adjustment device can be fully or partially through software, hard
Part and combinations thereof is realized.Above-mentioned each module can be embedded in the form of hardware or independently of in the processor in computer equipment,
It can also be stored in a software form in the memory in computer equipment, execute the above modules in order to which processor calls
Corresponding operation.
In one embodiment, as shown in figure 5, providing a kind of link circuit self-adapting method of adjustment, it is applied in this way
For the AMC scheduling unit for the angle framework realized from code, it may comprise steps of:
Scheduling CSI Air conduct measurement unit obtains the CSI information that terminal reports, and CSI information is transferred to AMC feedback control
Unit；
It dispatches AMC feedback control unit and handles CSI information according to control target, using closed loop control algorithm, fed back
Control output result；
Scheduling CSI Interference Detection unit obtains the interference information that terminal reports, and interference information is transferred to AMC feedforward control
Unit processed；
It dispatches AMC feedforward control unit and uses feedforward compensation algorithm process interference information, obtain feedforward control output result；
It is exported based on feedback control output result and feedforward control as a result, determining link circuit self-adapting parameter and resource allocation side
Case；And link circuit self-adapting parameter and Resource Allocation Formula are transferred to executive device.
Specifically, AMC feedback control unit is mainly completed to receive the CSI information that terminal UE reports, mainly CQI letter
Breath, is mapped to efficiency Efficency value (spectrum utilization efficiency), utilizes current and last time Efficency using integral way
Value calculates final Efficency value, is then mapped to MCS Index and coding mode.Meanwhile utilizing HARQ information, meter
Calculate whether BLER meets the requirements.
AMC feedforward control unit is mainly completed to receive the interference measurement results that terminal UE reports, using static state feedforward control
Technology processed calculates compensation rate, and interference is fully compensated.
AMC controls scheduling unit according to AMC Front feedback control unit and AMC feedback control unit, determines the chain of selection
The parameter and Resource Allocation Formula of the adaptive AMC in road, and link circuit self-adapting parameter and Resource Allocation Formula notifying link is adaptive
Answer AMC executive device.
Further, AMC controls scheduling unit from angle is realized come what is illustrated, is the mould that MAC layer realizes AMC Row control
Block.AMC can be controlled into scheduling unit in the application and be understood as scheduler, when send out the CSI-RS (ginseng of CSI Air conduct measurement
Examine signal) when/CSI-IM (reference signal of CSI interference measurement), receive CSI in uplink and receive the CSI of how many BIT
The scheduling such as code stream.
It should be noted that AMC, which controls scheduling unit, to carry out overall control to four units of figure periphery in Fig. 5,
This four units have some timing requirements.This is to realize angle from code to illustrate.
Specific restriction about each unit in Fig. 5 may refer to above for each device in link circuit self-adapting adjustment system
Restriction, details are not described herein.Each unit in Fig. 5 can be realized fully or partially through software, hardware and combinations thereof.On
Stating each unit can be embedded in the form of hardware or independently of in the processor in computer equipment, can also store in a software form
In memory in computer equipment, the corresponding operation of the above modules is executed in order to which processor calls.
In one embodiment, a kind of base station is provided, including any one of aforementioned link circuit self-adapting adjusts system.
Base station applies are in 5G NR system in one of the embodiments,.
Base station is for configuring CSI-RS parameter, CSI-IM parameter and CSI parameter in one of the embodiments,；
Base station CSI-RS parameter, CSI-IM parameter are handed down to terminal；CSI-RS parameter is used to indicate terminal measurement channel
Quality, and report CSI information；CSI-IM parameter is used to indicate terminal measurement channel disturbance, and reports interference information.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
The step of any of the above-described link circuit self-adapting method of adjustment is realized when machine program is executed by processor.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (12)
1. a kind of link circuit self-adapting adjusts system, which is characterized in that including CSI channel-detecting device, AMC feedback controller, CSI
Interference measurement device, AMC feedforward controller and executive device；Wherein:
The CSI channel-detecting device obtains the CSI information that terminal reports, and the CSI information is transferred to the AMC and is fed back
Controller；
The AMC feedback controller handles the CSI information according to control target, using closed loop control algorithm, obtains feedback control
System output is as a result, and transmit the feedback control output result to the executive device；
The CSI interference measurement device obtains the interference information that terminal reports, and before the interference information is transferred to the AMC
Present controller；
The AMC feedforward controller obtains feedforward control output as a result, simultaneously using interference information described in feedforward compensation algorithm process
The feedforward control, which is transmitted, to the executive device exports result；
The executive device by based on the feedback control output result and the feedforward control output result, determination link from
Adaptation parameter and Resource Allocation Formula are transmitted to the wireless channel of the terminal by antenna port.
2. link circuit self-adapting according to claim 1 adjusts system, which is characterized in that the AMC feedforward controller is PI
Controller or p-type controller；The interference information includes disturbance quantity；The feedforward control output result includes compensation rate；
The AMC feedforward controller obtains interfering channel model, wireless channel model, CSI Air conduct measurement dress by abstract respectively
Set model, feedback controller model, feedforward controller model and executive device model；
The AMC feedforward controller handles the interfering channel using the disturbance quantity as input quantity, using closed loop transfer function,
Model, the wireless channel model, the CSI channel-detecting device model, the feedback controller model, the feedforward control
Device model and the executive device model, obtain output quantity.
3. link circuit self-adapting according to claim 2 adjusts system, which is characterized in that
The AMC feedforward controller obtains the output using the disturbance quantity as input quantity, using following closed loop transfer function,
Amount:
If D (s) is 0:
Wherein, Y (s) is the output quantity, and D (s) is the disturbance quantity, and H (s) is the CSI channel-detecting device model, Ga(s)
For the executive device model, G (s) is the wireless channel model, GfIt (s) is the feedforward controller model, Gc(s) for institute
State feedback controller model, GdIt (s) is the interfering channel model, GfFor feedforward controller transfer function.
4. link circuit self-adapting according to claim 1 adjusts system, which is characterized in that the control target include BLER with
Downlink transmission rate；The AMC feedback controller is PI controller or p-type controller；
The AMC feedback controller obtains wireless channel model, CSI channel-detecting device model, feedback control by abstract respectively
Device model and executive device model processed；
The control target is handled the wireless communication as input quantity, using closed loop transfer function, by the AMC feedback controller
Road model, the CSI channel-detecting device model, the feedback controller model and the executive device model, obtain defeated
Output.
5. link circuit self-adapting according to claim 4 adjusts system, which is characterized in that the AMC feedback controller foundation
Target is controlled, the output quantity is obtained using following closed loop transfer function:
Wherein, Y (s) is the output quantity, and X (s) is the input quantity, and H (s) is the CSI channel-detecting device model, Ga(s)
For the executive device model, G (s) is the wireless channel model, GcIt (s) is the feedback controller model.
6. link circuit self-adapting according to claim 1 adjusts system, which is characterized in that the CSI information includes CQI letter
Breath；The feedback control output result includes MCS value and coded format；
The AMC feedback controller is based on the CQI information, mapped using corresponding algorithm after table look-up, obtain current frequency
Compose utilization efficiency；
The AMC feedback controller carries out Integral Processing to a preceding spectrum utilization efficiency and the current spectral utilization efficiency,
Obtain final spectrum utilization efficiency；
The AMC feedback controller maps the final spectrum utilization efficiency, obtains the MCS value and the coding lattice
Formula.
7. a kind of link circuit self-adapting method of adjustment, which is characterized in that comprising steps of
The feedback control for receiving the transmission of AMC feedback controller exports result；The feedback control output result is by CSI information through institute
AMC feedback controller is stated to handle to obtain according to control target, using closed loop control algorithm；What the CSI information was reported by terminal
CSI information is transferred to the AMC feedback controller through CSI channel-detecting device；
The feedforward control for receiving the transmission of AMC feedforward controller exports result；The feedforward control output result is passed through by interference information
The AMC feedforward controller is obtained using feedforward compensation algorithm process；The interference information is passed through by the interference information that terminal reports
CSI interference measurement device is transferred to the AMC feedforward controller；
It will be based on feedback control output result and feedforward control output result, the link circuit self-adapting parameter of determination and money
Source allocation plan is transmitted to the wireless channel of the terminal by antenna port.
8. a kind of link circuit self-adapting adjusts device characterized by comprising
Feedback reception module, the feedback control for receiving the transmission of AMC feedback controller export result；The feedback control output
As a result it handles to obtain according to control target, using closed loop control algorithm through the AMC feedback controller by CSI information；The CSI
The CSI information that information is reported by terminal is transferred to the AMC feedback controller through CSI channel-detecting device；
Feedover receiving module, and the feedforward control for receiving the transmission of AMC feedforward controller exports result；The feedforward control output
As a result it is obtained through the AMC feedforward controller using feedforward compensation algorithm process by interference information；The interference information is by terminal
The interference information reported is transferred to the AMC feedforward controller through CSI interference measurement device；
Physical layer transmission module, for result and the feedforward control output result, determination will to be exported based on the feedback control
Link circuit self-adapting parameter and Resource Allocation Formula, the wireless channel of the terminal is transmitted to by antenna port.
9. a kind of base station, which is characterized in that the base station includes link circuit self-adapting tune described in any one of claims 1 to 6
Whole system.
10. base station according to claim 9, which is characterized in that the base station applies are in 5G NR system.
11. base station according to claim 9 or 10, which is characterized in that
The base station is for configuring CSI-RS parameter, CSI-IM parameter and CSI parameter；
The base station CSI-RS parameter, the CSI-IM parameter are handed down to terminal；The CSI-RS parameter is used to indicate
The terminal measures channel quality, and reports CSI information；It is dry that the CSI-IM parameter is used to indicate the terminal measurement channel
It disturbs, and reports interference information.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of claim 7 the method is realized when being executed by processor.
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