CN103312432B - A kind of method for precoding, base station and subscriber equipment - Google Patents
A kind of method for precoding, base station and subscriber equipment Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of method for precoding, base station and subscriber equipment, relates to the communications field, it is possible to adaptive selection nonlinear precoding scheme, improves systematic function.A kind of method for precoding, including: base station obtains the predefined parameter of at least one subscriber equipment；The predefined parameter obtained is calculated calculation of performance indicators；According to calculation of performance indicators selected target pre-coding scheme；And scheme carries out precoding to the data message of all subscriber equipmenies accordingly；If target pre-coding scheme is nonlinear precoding scheme, send data message and the indication signaling of instruction nonlinear precoding scheme information to each subscriber equipment；Subscriber equipment receives data message and the indication signaling that base station sends；According to the receiver type selective receiver obtained according to indication signaling；Utilize the receiver selected that the data message received is detected.The embodiment of the present invention is for the precoding of mimo system.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method for precoding, base station and user and set
Standby.
Background technology
In existing LTE (Long Term Evolution, Long Term Evolution) system, MIMO
(Multiple Input Multiple Output, multiple-input, multiple-output) are key technologies of physical layer,
The one side of systematic function is promoted mainly by multiple transmitting antennas and multiple reception antenna
Method.
Wherein, precoding technique is a very important step of MIMO, carry out pre-
Before coding, system first passes through layer mapping and data message to be sent is mapped to different layers
On, so that data message is assigned on different layers according to certain mode, then by prelisting
Code technology is mapped to the data message being assigned on layer on physical antenna, so, permissible
The signal processing of some necessity being difficult to carry out at receiving terminal is put at transmitting terminal and carries out,
Thus ensure the signal performance of transmitting procedure.
A kind of adaptive technique of existing precoding technique, along with CSI (Channel
State Information, channel condition information) change, data message is carried out precoding
Result also can correspondingly change, this change according to CSI and the data message of real-time change is pre-
Treatment technology makes UE (User Equipment, subscriber equipment) can obtain in the CSI of change
Obtain target data information correctly, ten during therefore precoding is LTE system MIMO
Divide crucial technology.
But, the performance of different pre-coding schemes and complexity are mutually different, typically
Pre-coding scheme can be divided into linear predictive coding and nonlinear precoding two class, and each class prelists
Code scheme has its operative scenario being suitable for.And in existing LTE protocol, prelisting of employing
Code scheme is linear predictive coding scheme, but in some scene, linear predictive coding scheme provides
Gain too small, it is impossible to meet the transmission requirement of system, so cause systematic function serious under
Fall.
Summary of the invention
Embodiments of the invention provide a kind of method for precoding, base station and subscriber equipment, it is possible to from
The selection of adaptation, use nonlinear precoding scheme, improve the performance of system further.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
On the one hand, it is provided that a kind of method for precoding, including:
Obtain the predefined parameter of at least one subscriber equipment；
The predefined parameter of all described subscriber equipment obtained is calculated, obtains calculated performance
Index；
Select to determine target pre-coding scheme according to described calculation of performance indicators；
According to described target pre-coding scheme, the data message of described all subscriber equipmenies is carried out
Precoding；
If described target pre-coding scheme is nonlinear precoding scheme, set to each described user
Preparation is sent data message and indicates the indication signaling of described nonlinear precoding scheme information.
On the one hand, it is provided that a kind of method for precoding, including:
Receiving data message and indication signaling that base station sends, the instruction of described indication signaling is non-linear
Pre-coding scheme information；
According to the receiver type selective receiver obtained according to described indication signaling；
Utilize the described receiver selected that the described data message received is detected.
On the other hand, it is provided that a kind of base station, including:
Acquiring unit, for obtaining the predefined parameter of at least one subscriber equipment；
Computing unit, for described in all described subscriber equipment that obtains described acquiring unit
Predefined parameter calculates, and obtains calculation of performance indicators；
Selection determines unit, in the described calculated performance calculated according to described computing unit
Index selects to determine target pre-coding scheme；
Coding unit, for determining, according to described selection, the described target precoding side that unit determines
Case carries out precoding to the data message of described all subscriber equipmenies；
First transmitting element, if being nonlinear precoding side for described target pre-coding scheme
Case, sends data message to each described subscriber equipment and indicates described nonlinear precoding side
The indication signaling of case information.
On the other hand, it is provided that a kind of subscriber equipment, including:
Receive unit, for receiving data message and indication signaling, the described instruction that base station sends
Signaling instruction nonlinear precoding scheme information；
Select unit, for the reception obtained according to the indication signaling received according to reception unit
Machine type selecting receiver；
The described receiver selected, for the described data message receiving described reception unit
Detect.
Method for precoding, base station and the subscriber equipment that the embodiment of the present invention provides, base station obtains extremely
The predefined parameter of a few subscriber equipment, and predefined parameter is calculated, obtain calculated performance
Index；Target pre-coding scheme is selected further according to calculation of performance indicators, and accordingly to data message
Carry out precoding；If target pre-coding scheme is nonlinear precoding scheme, set to each user
Preparation send data message and the indication signaling of instruction nonlinear precoding scheme information.Subscriber equipment
Receive data message and indication signaling that base station sends；According to the reception obtained according to indication signaling
Machine type selecting receiver；Utilize the receiver selected that the data message received is detected.
So, base station just can select the one of gain effect optimum according to the practical situation in system
Planting pre-coding scheme, base station can also indicate receiver class according to the demand of pre-coding scheme simultaneously
Type, it is ensured that being properly received of transmission, thus improve the transmission quality of system, and then improve system
Performance.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that,
Accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain the attached of other according to these accompanying drawings
Figure.
The method for precoding schematic flow sheet that Fig. 1 provides for the embodiment of the present invention；
Another method for precoding schematic flow sheet that Fig. 2 provides for the embodiment of the present invention；
The linear predictive coding that Fig. 3 provides for the embodiment of the present invention and nonlinear precoding handling capacity
Emulation schematic diagram；
The another method for precoding schematic flow sheet that Fig. 4 provides for the embodiment of the present invention；
Another method for precoding schematic flow sheet that Fig. 5 provides for the embodiment of the present invention；
The structural representation of the base station that Fig. 6 provides for the embodiment of the present invention；
The structural representation of another base station that Fig. 7 provides for the embodiment of the present invention；
The structural representation of the subscriber equipment that Fig. 8 provides for the embodiment of the present invention；
The structural representation of another subscriber equipment that Fig. 9 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is entered
Row clearly and completely describes, it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into present invention protection
Scope.
The method for precoding that the embodiment of the present invention provides, as it is shown in figure 1, the method step includes:
S101, base station obtain the predefined parameter of at least one subscriber equipment.
It should be noted that above-mentioned predefined parameter can include channel status and/or channel quality
Parameter.Wherein channel status includes the parameters such as descending signal to noise ratio, channel relevancy, channel matter
Amount includes CQI (Channel Quality Indicator, channel quality indicates) etc., in system
During real work, base station can be by measuring the signal received or by receiving user
The feedback of equipment, real-time obtains above-mentioned channel status or the parameter of channel quality, or real-time
Obtaining the parameter of above-mentioned channel status and channel quality, above-mentioned reception signal can be with reference to letter
Number or data signal, or reference signal and data signal.Additionally, predefined parameter is all right
It is antenna configurations, the parameter such as including reception antenna quantity, number of transmission antennas, polarization mode；
Base station can by subscriber equipment access network time the acquisition of information that reports.
S102, the predefined parameter of the base station all subscriber equipmenies to obtaining calculate, and are counted
Calculate performance indications.
It is worthy of note, at MIMO, (Multiple Input Multiple Output, enters more
Having more) in system, before precoding, system first passes through layer and maps to be sent
Data message is mapped to different layers up, and " layer " can be considered as one " empty antenna ", and layer maps
Purpose data message is assigned on different " empty antenna " according to certain way.Then lead to
Cross precoding technique the data message being assigned on layer is mapped on physical antenna, its objective is
Necessary signal processing in order to some be difficult to carry out on a user device is put into base station
Place is carried out, and so, base station is accomplished by all of subscriber equipment is carried out combined calculation, enters
And all subscriber equipmenies are carried out combined coding.
It should be noted that the performance that calculation of performance indicators here obtains after referring to calculate refers to
Mark, subsequent step compares according to this calculation of performance indicators and selects, the most only
It is that calculation of performance indicators can be any one in order to be different from other uncalculated performance indications
Performance indications, do not do any restriction with this.
Further, calculate for different types of calculation of performance indicators, as when calculate with
During the unrelated class performance indications of concrete pre-coding scheme, it is not necessary to for every kind of pre-coding scheme
Calculating respectively, this kind of calculation of performance indicators needs a pre-determined threshold, according to calculation of performance indicators
More than or less than pre-determined threshold, select a certain pre-coding scheme, when calculating and precoding side
During the relevant class performance indications of case, it is required for each pre-coding scheme and counts respectively
Calculating, i.e. every kind pre-coding scheme all associates a calculation of performance indicators, now, it is not necessary to door
Limit value, it is only necessary to the calculation of performance indicators of all pre-coding schemes is compared to each other, selects to calculate
The pre-coding scheme that performance indications are best.
S103, base station select to determine target pre-coding scheme according to calculation of performance indicators.
It is worthy of note, base station is according to the class that the calculation of performance indicators obtained is above-mentioned two apoplexy due to endogenous wind
Type correspondence use different preset rules to determine target pre-coding scheme, such as first kind computational
Energy index and concrete pre-coding scheme are unrelated, it is not necessary to count respectively for every kind of pre-coding scheme
Calculate, now need a pre-determined threshold, according to calculation of performance indicators more than or less than pre-determined threshold,
Determining target pre-coding scheme, another kind of performance indications are relevant with pre-coding scheme, need pin
Each pre-coding scheme is respectively calculated, the most then need not threshold value, only
Need the calculation of performance indicators of all pre-coding schemes to be compared to each other, select calculation of performance indicators
Best pre-coding scheme, if calculation of performance indicators is handling capacity, it is possible to according to calculating
The pre-coding scheme that result selects handling capacity maximum is defined as target pre-coding scheme etc., the most only
With this kind of preset rules citing, but do not do any restriction with this.
The data message of all subscriber equipmenies is carried out by S104, base station according to target pre-coding scheme
Precoding.
If the target pre-coding scheme that S105 base station determines is nonlinear precoding scheme, then to
Each subscriber equipment sends data message and the instruction of instruction nonlinear precoding scheme information
Signaling.
Wherein, indication signaling specifically can carry nonlinear precoding scheme or non-linear prelist
Code scheme, or carry nonlinear precoding scheme and nonlinear precoding scheme, corresponding
Receiver type.
It should be noted that although precoding technique is a kind of Signal Pretreatment technology of base station,
The correct transmission of signal can be to ensure that, it is also desirable to receiving-transmitting sides carries out certain cooperation, right
In various Linear Precodings, common receiver, such as ZF (Zero-Forcing, ZF)
Receiver, MMSE (Minimum Mean Square Error, least mean-square error) connects
Receipts machines etc. are the most applicable；But different from Linear Precoding, nonlinear precoding interface differential technique
The type of receipts machine there may be the requirement that some are special, such as THP (Tomlinson-Harashima
Precoding, Tomlinson-Harrar wishes agate precoding) scheme requires that receiver has one and asks
Modular arithmetic ability, therefore when using certain type of nonlinear precoding scheme, needs base station
Inform the receiver type that its needs of subscriber equipment use, so base station can be according to prelisting of selecting
Code mode, determines in indication signaling the need of corresponding the connecing of the pre-coding scheme carrying selection
Receipts machine type.
It is worthy of note, the indication signaling sent to subscriber equipment in step S105 is divided into three
Kind of situation, when indication signaling had not only carry nonlinear precoding scheme but also carry this non-linear pre-
During receiver type corresponding to encoding scheme, the receiver that subscriber equipment can indicate according to this
Type selecting receiver, the data message received is examined by the receiver selected by recycling
Survey, and the indication signaling of nonlinear precoding scheme may be used for estimating to subscriber equipment instruction channel
The method of meter；When indication signaling simply carries nonlinear precoding scheme, subscriber equipment can
Select to receive with the receiver type corresponding according to this nonlinear precoding of common agreement in advance
Machine, and use this receiver that the data message received is detected；When indication signaling is simply taken
During with the receiver type that this nonlinear precoding scheme is corresponding, subscriber equipment is then according to instruction
Receiver type selective receiver, the receiver selected by recycling to receive data message
Detect.
The method for precoding that the embodiment of the present invention provides, base station obtains at least one subscriber equipment
Predefined parameter, and predefined parameter is calculated, obtain calculation of performance indicators；Further according to calculating
Performance indications select target pre-coding scheme, and accordingly data message are carried out precoding；If mesh
Mark pre-coding scheme be nonlinear precoding scheme, to each subscriber equipment send data message and
The indication signaling of instruction nonlinear precoding scheme information.Subscriber equipment receives the number that base station sends
It is believed that breath and indication signaling；Select to receive according to the receiver type obtained according to indication signaling
Machine；The data message received is detected by the receiver selected by recycling.So,
Base station just can select a kind of precoding of gain effect optimum according to the practical situation in system
Scheme, base station can also indicate receiver type according to the demand of pre-coding scheme simultaneously, it is ensured that
Being properly received of transmission, thus improve the transmission quality of system, and then improve systematic function.
The method for precoding that another embodiment of the present invention provides, as in figure 2 it is shown, the method step
Including:
S201, base station obtain at least one subscriber equipment by measuring the signal received
Predefined parameter, or according to receiving the feedback that at least one subscriber equipment sends, user in real
The predefined parameter of equipment.
It is worthy of note, predefined parameter can be channel status, channel quality or antenna configurations
Parameter in one or more, wherein, the signal of reception can be reference signal or data letter
Number, or reference signal and data signal.
S202, the predefined parameter of the base station all subscriber equipmenies to obtaining calculate, and are counted
Calculate performance indications.
Calculate it should be noted that base station can use according to different types of performance indications
Obtain calculation of performance indicators, first kind calculation of performance indicators, be the channel shape according to present channel
States etc. determine, unrelated with encoding scheme, and such as channel relevancy etc., Equations of The Second Kind calculated performance refers to
Mark is the calculation of performance indicators obtained for each pre-coding scheme, such as each precoding side
The handling capacity of case.
When calculation of performance indicators is the first kind, performs step S203, work as calculation of performance indicators
During for Equations of The Second Kind, perform step S204.
S203, base station select the first pre-determined characteristics index pre-more than first according to calculation of performance indicators
If the pre-coding scheme of threshold value is defined as target pre-coding scheme；Or, refer to according to calculated performance
Mark selects the second pre-determined characteristics index to be defined as less than the pre-coding scheme of the second predetermined threshold value
Target pre-coding scheme.
Exemplary, base station can directly calculate the value of performance indications, such as channel relevancy
Value, then with the first predetermined threshold value compares, and selects channel relevancy to preset door more than first
One linear predictive coding scheme of limit value or nonlinear precoding scheme, or, calculate descending
Signal to noise ratio, select descending signal to noise ratio less than the second default capabilities index linear predictive coding scheme or
Nonlinear precoding scheme, such as, analyzes according to above-mentioned analogous diagram 3 and can be seen that, base station is only
In the case of low correlation and descending signal to noise ratio are higher, select ZF-BF linear predictive coding side
Case is target pre-coding scheme, all selects THP nonlinear precoding scheme to make under other scenes
For target pre-coding scheme.
In the calculation of performance indicators that S204, base station obtain according to all pre-coding schemes, select the
A kind of pre-coding scheme of three pre-determined characteristics indexs maximums is defined as target pre-coding scheme, or,
In the calculation of performance indicators obtained according to all pre-coding schemes, the 4th pre-determined characteristics is selected to refer to
A kind of pre-coding scheme of mark minimum is defined as target pre-coding scheme.
It should be noted that base station is that the predefined parameter to all subscriber equipmenies obtained is according to every
Plant pre-coding scheme to be respectively calculated, obtain calculation of performance indicators.
Exemplary, as it is shown on figure 3, can be specifically maximum the prelisting of base station selected handling capacity
Code scheme is as target pre-coding scheme.In predefined two pre-coding schemes, one
For linear predictive coding scheme ZF-BF, (Zero-Forcing Beamforming, close-to zero beam is composed
Shape), another is then nonlinear precoding scheme THP.Non-linear under certain scene prelist
Code is provided that more more preferable throughput performance than linear predictive coding really.Simulating scenes at Fig. 3
In, having 4 subscriber equipmenies, 1 base station, each subscriber equipment has 2 reception antennas,
Base station has 4 transmitting antennas, and up signal to noise ratio is 20dB, and emulation is at channel high correlation
In scene and channel low correlation scene, compared for respectively linear predictive coding scheme ZF-BF and
The handling capacity of nonlinear precoding scheme THP.
In Fig. 3, abscissa is descending signal to noise ratio, and vertical coordinate is 12 RB (Resource
Block, Resource Block) upper total throughput of system.From the figure, it can be seen that only at low correlation
And under the scene of descending signal to noise ratio higher (descending signal to noise ratio is approximately more than equal to 18dB), ZF-BF line
Property pre-coding scheme throughput performance higher than the handling capacity of THP nonlinear precoding scheme
Can, under other scenes, it is all that the throughput performance that THP nonlinear precoding scheme provides is high
In the throughput performance of ZF-BF linear predictive coding scheme, under the scene of high correlation especially
Substantially.
The data message of all subscriber equipmenies is carried out by S205, base station according to target pre-coding scheme
Precoding.
S206, base station send data message to subscriber equipment and carry the letter of target pre-coding scheme
The indication signaling of breath.
Further, if the base station selected target pre-coding scheme determined is linear predictive coding side
Case, then base station sends the linear predictive coding scheme and/or linear of carrying to each subscriber equipment
The indication signaling of the receiver type that pre-coding scheme is corresponding.It is linear when indication signaling carries
During receiver type corresponding to pre-coding scheme, use the type receiver detection data message；
When indication signaling does not carry the receiver type of correspondence, linear predictive coding scheme pair is described
Receiver does not has any special requirement, so subscriber equipment obtains linear pre-according to indication signaling
Encoding scheme, uses arbitrary receiver to detect.
If the base station selected target pre-coding scheme determined is nonlinear precoding scheme, then basis
This nonlinear precoding scheme requirement to receiver type, sends data letter to subscriber equipment
Breath and carry nonlinear precoding scheme and/or receiver corresponding to nonlinear precoding scheme
The indication signaling of type, as when base station selected THP pre-coding scheme, THP precoding
Scheme requires that receiver possesses the operational capability having modulus, and now, base station can be to subscriber equipment
Send data message and carry the indication signaling of THP pre-coding scheme so that subscriber equipment root
According to knowing that with base station THP pre-coding scheme needs the receiver with modulus operational capability the most altogether,
And select the type receiver to detect data message；Or, only in indication signaling, carry reception
Machine needs possess this information of modulus operational capability, makes user's equipment choice have modulus ability
Receiver detection data message；Or carry THP pre-coding scheme and THP precoding simultaneously
The receiver type that scheme is corresponding.
It is worthy of note, the indication signaling sent to subscriber equipment can be carried on PDCCH
The specific RE of (Physical Downlink Control Channel, Physical Downlink Control Channel)
It is transmitted on (Resource Element, Resource Unit).
The method for precoding that the embodiment of the present invention provides, base station obtains at least one subscriber equipment
Predefined parameter, and predefined parameter is calculated, obtain calculation of performance indicators；Further according to calculating
Performance indications select target pre-coding scheme, and accordingly data message are carried out precoding；If mesh
Mark pre-coding scheme be nonlinear precoding scheme, to each subscriber equipment send data message and
The indication signaling of instruction nonlinear precoding scheme information.Subscriber equipment receives the number that base station sends
It is believed that breath and indication signaling；Select to receive according to the receiver type obtained according to indication signaling
Machine；The data message received is detected by the receiver selected by recycling.So,
Base station just can select a kind of precoding of gain effect optimum according to the practical situation in system
Scheme, base station can also indicate receiver type according to the demand of pre-coding scheme simultaneously, it is ensured that
Being properly received of transmission, thus improve the transmission quality of system, and then improve systematic function.
The method for precoding that further embodiment of this invention provides, as shown in Figure 4, the method step
Including:
S301, subscriber equipment receive data message and indication signaling, the indication signaling that base station sends
The nonlinear precoding scheme information that instruction base station is selected.
Further, indication signaling can carry the base station selected nonlinear precoding scheme determined
And/or the receiver type that nonlinear precoding scheme is corresponding.
Exemplary, the indication signaling received when subscriber equipment is carried on the specific of PDCCH
When RE is upper, by this specific RE on detection PDCCH, subscriber equipment confirms that target is pre-
Encoding scheme is connecing of requiring of nonlinear precoding scheme or this nonlinear precoding scheme correspondence
Receipts machine type, or be nonlinear precoding scheme and this corresponding requirement of nonlinear precoding scheme
Receiver type.
S302, subscriber equipment select to receive according to the receiver type obtained according to indication signaling
Machine.
It is worthy of note, the indication signaling that base station sends includes three kinds of situations, subscriber equipment root
Different process is carried out: when indication signaling had both carry nonlinear precoding scheme according to different situations
When carry again receiver type corresponding to this nonlinear precoding scheme, subscriber equipment can root
The receiver type selective receiver indicated according to this, the receiver selected by recycling is to reception
Data message detect, and the indication signaling of nonlinear precoding scheme may be used for
The method that family equipment instruction channel is estimated；When indication signaling simply carries nonlinear precoding side
During case, subscriber equipment can be according to this nonlinear precoding scheme jointly arranged with base station in advance
Corresponding receiver type selective receiver, and use this receiver that data message is examined
Survey；When indication signaling simply carries the receiver type that this nonlinear precoding scheme is corresponding
Time, subscriber equipment is then according to the receiver type selective receiver of instruction, selected by recycling
The data message received is detected by receiver.
S303, subscriber equipment utilize the receiver selected to detect the data message received.
The method for precoding that the embodiment of the present invention provides, is obtained at least one subscriber equipment by base station
Predefined parameter, and predefined parameter is calculated, obtains calculation of performance indicators；Further according to meter
Calculate performance indications and select target pre-coding scheme, and accordingly data message is carried out precoding；If
Target pre-coding scheme is nonlinear precoding scheme, sends data message to each subscriber equipment
Indication signaling with instruction nonlinear precoding scheme information.Subscriber equipment receives what base station sent
Data message and indication signaling；Select to receive according to the receiver type obtained according to indication signaling
Machine；The data message received is detected by the receiver selected by recycling.So,
Base station just can select a kind of precoding of gain effect optimum according to the practical situation in system
Scheme, base station can also indicate receiver type according to the demand of pre-coding scheme simultaneously, it is ensured that
Being properly received of transmission, thus improve the transmission quality of system, and then improve systematic function.
The method for precoding that yet another embodiment of the invention provides, as it is shown in figure 5, the method step
Including:
S401, subscriber equipment are by measuring acquisition predefined parameter to the signal received.
Exemplary, predefined parameter can be channel status or the one of channel quality parameter or several
Kind, the signal of reception can be reference signal or data signal, or reference signal sum it is believed that
Number.
Further, predefined parameter can also be antenna configurations, and subscriber equipment can be in access network
Report to base station during network.
It is worthy of note, each subscriber equipment can obtain channel status or antenna configurations or
One or more parameters of channel quality, then send respective channel status or antenna to base station
One or more of the parameter of configuration or channel quality, it is also possible to do not send and measured by base station oneself
Obtain.
S402, subscriber equipment send the predefined parameter obtained to base station.
S403, subscriber equipment receive data message and the indication signaling that base station sends.
It should be noted that the target pre-coding scheme that ought base station selected determine is linear predictive coding
During scheme, indication signaling carries this linear predictive coding scheme and/or linear predictive coding scheme is corresponding
Receiver type；When the base station selected target pre-coding scheme determined is nonlinear precoding side
During case, indication signaling carries this nonlinear precoding scheme and/or nonlinear precoding scheme pair
The receiver type answered.
S404, subscriber equipment select to receive according to the receiver type obtained according to indication signaling
Machine.
Further, when indication signaling carries the base station selected linear predictive coding scheme determined
Or during receiver type corresponding to nonlinear precoding scheme, subscriber equipment is according to this receiver
Type selecting receiver；When indication signaling does not carries the base station selected linear predictive coding determined
When scheme or receiver type corresponding to nonlinear precoding scheme, subscriber equipment according to base station
The corresponding relation known altogether determines linear predictive coding scheme or corresponding the connecing of nonlinear precoding scheme
Receipts machine type.
It should be noted that when indication signaling only carries linear predictive coding scheme, this line is described
Property precoding does not has particular/special requirement, so subscriber equipment can an optional receiver to receiver
Detect.
S405, subscriber equipment utilize the receiver selected to detect the data message received.
The method for precoding that the embodiment of the present invention provides, is obtained at least one subscriber equipment by base station
Predefined parameter, and predefined parameter is calculated, obtains calculation of performance indicators；Further according to meter
Calculate performance indications and select target pre-coding scheme, and accordingly data message is carried out precoding；If
Target pre-coding scheme is nonlinear precoding scheme, sends data message to each subscriber equipment
Indication signaling with instruction nonlinear precoding scheme information.Subscriber equipment receives what base station sent
Data message and indication signaling；Select to receive according to the receiver type obtained according to indication signaling
Machine；The data message received is detected by the receiver selected by recycling.So,
Base station just can select a kind of precoding of gain effect optimum according to the practical situation in system
Scheme, base station can also indicate receiver type according to the demand of pre-coding scheme simultaneously, it is ensured that
Being properly received of transmission, thus improve the transmission quality of system, and then improve systematic function.
The base station 40 that the embodiment of the present invention provides, as Fig. 6 shows, including:
Acquiring unit 401, for obtaining the predefined parameter of at least one subscriber equipment.
Further, acquiring unit 401 is additionally operable to by the signal received is measured acquisition
The predefined parameter of at least one subscriber equipment 50.
Or, acquiring unit 401, it is additionally operable to according to receiving the anti-of at least one subscriber equipment transmission
Feedback, the predefined parameter of user in real equipment 50.
Computing unit 402, for all subscriber equipmenies 50 that acquiring unit 401 obtains
Predefined parameter calculates, and obtains calculation of performance indicators.
Further, computing unit 402 can according to the channel status of all subscriber equipmenies 50,
Such as descending signal to noise ratio, channel relevancy；Or antenna configurations, such as reception antenna quantity, transmitting
Antenna amount, polarization mode etc.；Or channel quality, as CQI calculates a pre-determined characteristics
Index, as obtained the throughput value of each precoding or obtaining the channel relevancy under current system
Value.
Selection determines unit 403, for the calculation of performance indicators choosing calculated according to computing unit
Select and determine target pre-coding scheme.
Exemplary, if computing unit 402 calculates first unrelated with pre-coding scheme and makes a reservation for
Performance indications, such as channel relevancy, then select to determine unit 403, specifically for selecting channel
Dependency is more than linear predictive coding scheme or the nonlinear precoding scheme of the first predetermined threshold value.
Further, if computing unit 402 calculating is that second unrelated with pre-coding scheme is pre-
Determine performance indications, such as descending signal to noise ratio, then select to determine that unit 403 selects the second pre-determined characteristics
Index is less than linear predictive coding scheme or the nonlinear precoding scheme of the second predetermined threshold value, tool
The manner of comparison of body is launched in embodiment of the method, does not repeats them here.
If it addition, computing unit 402 calculates the handling capacity for each pre-coding scheme, then
Selection determines unit 403, specifically in the handling capacity obtained according to all pre-coding schemes,
A kind of pre-coding scheme selecting handling capacity maximum is defined as target pre-coding scheme.
Further, if computing unit 402 calculates the computational for each pre-coding scheme
Energy index, according in the calculation of performance indicators that all pre-coding schemes obtain, selects the 4th to make a reservation for
A kind of pre-coding scheme of performance indications minimum is defined as target pre-coding scheme.
Coding unit 404, for determining, according to selection, the target precoding side that unit 403 determines
Case carries out precoding to the data message of all subscriber equipmenies 50.
First transmitting element 405, if determining the selected target precoding of unit 403 for selection
Scheme is nonlinear precoding scheme, sends data message to each subscriber equipment 50 and refers to
Show the indication signaling of nonlinear precoding scheme information.
Wherein, indication signaling can carry nonlinear precoding scheme and/or non-linear prelist
The indication signaling of the receiver type that code scheme is corresponding.
It is worthy of note, base station is as it is shown in fig. 7, also include:
Second transmitting element 406, if being linear predictive coding scheme for target pre-coding scheme,
Send data message to each subscriber equipment and carry linear predictive coding scheme and/or linear
The indication signaling of the receiver type that pre-coding scheme is corresponding.
The method that this base station 40 can use above-described embodiment to provide is operated, method of work
Identical with the method that embodiment provides, do not repeat them here.
The base station that the embodiment of the present invention provides, base station obtains the predetermined ginseng of at least one subscriber equipment
Number, and predefined parameter is calculated, obtain calculation of performance indicators；Refer to further according to calculated performance
Mark selects target pre-coding scheme, and accordingly data message is carried out precoding；If target prelists
Code scheme is nonlinear precoding scheme, sends data message to each subscriber equipment and instruction is non-
The indication signaling of linear predictive coding scheme information.Subscriber equipment receives the data message that base station sends
And indication signaling；According to the receiver type selective receiver obtained according to indication signaling；Profit again
With the receiver selected, the data message received is detected.So, base station is the most permissible
A kind of pre-coding scheme of gain effect optimum, base simultaneously is selected according to the practical situation in system
Stand and can also indicate receiver type according to the demand of pre-coding scheme, it is ensured that correctly connecing of transmission
Receive, thus improve the transmission quality of system, and then improve systematic function.
The subscriber equipment 50 that the embodiment of the present invention provides, as shown in Figure 8, including:
Receive unit 501, for receiving data message and the indication signaling that base station 40 sends,
Indication signaling indicates the base station selected nonlinear precoding scheme information determined.
Wherein, instruction information can carry the nonlinear precoding scheme that base station 40 selects to determine
And/or the receiver type that nonlinear precoding scheme is corresponding.
Or, receive unit 501 and be additionally operable to receive data message and the instruction that base station 40 sends
Signaling, indication signaling carries base station 40 and selects the linear predictive coding scheme that determines and/or the most pre-
The receiver type that encoding scheme is corresponding.
Select unit 502, for obtaining according to the indication signaling received according to reception unit 501
The receiver type selective receiver 503 arrived.
Exemplary, select unit 502 for taking when the indication signaling receiving unit 501 reception
Nonlinear precoding scheme and/or the nonlinear precoding scheme correspondence determined is selected with base station 40
Receiver type time, according to receiver type selective receiver 503 to receive unit 501 connect
The data message received detects.
Or, select unit 502 for carrying base when the indication signaling receiving unit 501 reception
Stand and 40 select the linear predictive coding schemes that determine and/or receiver corresponding to linear predictive coding scheme
During type, according to receiver type selective receiver 503 to receiving the data that unit 501 receives
Information detects.
Further, subscriber equipment 50, as it is shown in figure 9, also include:
Measuring unit 504, for by measuring acquisition predefined parameter to the signal received.
Exemplary, measuring unit 504 is by measuring the signal received and to measurement
Result carries out being calculated channel status or by measuring and the signal received to measurement
Result carry out being calculated the parameter etc. of channel quality, the signal of above-mentioned reception can be reference
Signal and/or data signal.
Transmitting element 505, for sending the predefined parameter obtained to base station 40.
Exemplary, the predefined parameter of acquisition includes above-mentioned channel status or channel quality, or
For channel status and channel quality, it is also possible to include the antenna configurations of subscriber equipment 50, this sky
Line is configured to the known parameters of subscriber equipment.
The method that this subscriber equipment 50 can use above-described embodiment to provide is operated, work
The method that method provides with embodiment is identical, does not repeats them here.
The subscriber equipment that the embodiment of the present invention provides, is obtained at least one subscriber equipment by base station
Predefined parameter, and predefined parameter is calculated, obtain calculation of performance indicators；Further according to calculating
Performance indications select to determine target pre-coding scheme, and accordingly data message are carried out precoding；
If target pre-coding scheme is nonlinear precoding scheme, send data letter to each subscriber equipment
Breath and the indication signaling of instruction nonlinear precoding scheme information.Subscriber equipment receives base station and sends
Data message and indication signaling；Select to connect according to the receiver type obtained according to indication signaling
Receipts machine；The data message received is detected by the receiver that recycling selects.So,
Base station just can select a kind of precoding of gain effect optimum according to the practical situation in system
Scheme, base station can also indicate receiver type according to the demand of pre-coding scheme simultaneously, it is ensured that
Being properly received of transmission, thus improve the transmission quality of system, and then improve systematic function.
One of ordinary skill in the art will appreciate that: realize all or part of step of said method embodiment
Suddenly can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer
In read/write memory medium, this program upon execution, performs to include the step of said method embodiment；
And aforesaid storage medium includes: ROM, RAM, magnetic disc or CD etc. are various can store journey
The medium of sequence code.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
Being not limited to this, any those familiar with the art is at the technology model that the invention discloses
In enclosing, change can be readily occurred in or replace, all should contain within protection scope of the present invention.
Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (19)
1. a method for precoding, it is characterised in that including:
Obtain the predefined parameter of at least one subscriber equipment；
The predefined parameter of all described subscriber equipment obtained is calculated, obtains calculated performance
Index；
Select to determine that target pre-coding scheme, described target prelist according to described calculation of performance indicators
Code scheme includes nonlinear precoding scheme and linear predictive coding scheme；
The predefined parameter of the described all described subscriber equipment to obtaining calculates, and is calculated
Performance indications；Select to determine that target pre-coding scheme includes according to described calculation of performance indicators:
The predefined parameter of all described subscriber equipment obtained is divided according to every kind of pre-coding scheme
Do not calculate, obtain calculation of performance indicators；
In the calculation of performance indicators obtained according to all pre-coding schemes, select the 3rd precordainment
A kind of pre-coding scheme of energy index maximum is defined as target pre-coding scheme；
Or,
In the calculation of performance indicators obtained according to all pre-coding schemes, select the 4th precordainment
A kind of pre-coding scheme of energy index minimum is defined as target pre-coding scheme；
According to described target pre-coding scheme, the data message of described all subscriber equipmenies is carried out
Precoding；
If described target pre-coding scheme is nonlinear precoding scheme, set to each described user
Preparation is sent data message and indicates the indication signaling of described nonlinear precoding scheme information.
Method the most according to claim 1, it is characterised in that described acquisition at least
The predefined parameter of individual subscriber equipment includes:
The described predetermined of at least one subscriber equipment is obtained by the signal received is measured
Parameter；
Or,
According to receiving the feedback that at least one subscriber equipment sends, obtain described subscriber equipment in real time
Described predefined parameter.
Method the most according to claim 1, it is characterised in that described predefined parameter bag
Include channel status or channel quality；
Or, channel status and channel quality.
Method the most according to claim 1, it is characterised in that the described non-thread of described instruction
The indication signaling of property pre-coding scheme information for carry described nonlinear precoding scheme and/or
The indication signaling of the receiver type that described nonlinear precoding scheme is corresponding.
Method the most according to claim 1, it is characterised in that also include:
If described target pre-coding scheme is linear predictive coding scheme, to each described subscriber equipment
Send data message and carry described linear predictive coding scheme and/or described linear predictive coding
The indication signaling of the receiver type that scheme is corresponding.
6. according to the arbitrary described method of claim 1 to 5, it is characterised in that to each institute
The described indication signaling stating subscriber equipment transmission is carried on physical downlink control channel PDCCH
Transmit in particular resource unit RE.
7. a method for precoding, it is characterised in that including:
Receive data message and indication signaling that base station sends, described indication signaling instruction base station choosing
Fixed nonlinear precoding scheme information, described nonlinear precoding scheme is that described base station is to obtaining
The predefined parameter of all subscriber equipmenies taken is respectively calculated according to every kind of pre-coding scheme
The calculation of performance indicators arrived, in the calculation of performance indicators obtained according to all pre-coding schemes,
A kind of pre-coding scheme selecting the 3rd pre-determined characteristics index maximum is defined as target precoding side
Case, or, in the calculation of performance indicators obtained according to all pre-coding schemes, selection the 4th is pre-
A kind of pre-coding scheme determining performance indications minimum is defined as target pre-coding scheme；
According to the receiver type selective receiver obtained according to described indication signaling；
Utilize the described receiver selected that the described data message received is detected.
Method the most according to claim 7, it is characterised in that described reception base station is sent out
Before the data message sent and indication signaling, also include:
By the signal received is measured acquisition predefined parameter；
The described predefined parameter obtained is sent to described base station.
Method the most according to claim 8, it is characterised in that described predefined parameter bag
Include channel status or channel quality；
Or, channel status and channel quality.
Method the most according to claim 7, it is characterised in that described indication signaling refers to
The nonlinear precoding scheme information shown includes nonlinear precoding scheme and/or described non-linear
The receiver type that pre-coding scheme is corresponding.
11. methods according to claim 7, it is characterised in that also include:
Receiving data message and indication signaling that base station sends, described indication signaling carries base station choosing
Select the linear predictive coding scheme determined and/or receiver class corresponding to described linear predictive coding scheme
Type；
According to the receiver type selective receiver obtained according to described indication signaling；
Utilize the described receiver selected that the described data message received is detected.
12. 1 kinds of base stations, it is characterised in that include
Acquiring unit, for obtaining the predefined parameter of at least one subscriber equipment；
Computing unit, for described in all described subscriber equipment that obtains described acquiring unit
Predefined parameter calculates, and obtains calculation of performance indicators；
Selection determines unit, in the described calculated performance calculated according to described computing unit
Index selects to determine that target pre-coding scheme, described target pre-coding scheme include non-linear prelisting
Code scheme and linear predictive coding scheme；
Described computing unit, sets specifically for all described user obtaining described acquiring unit
Standby predefined parameter is respectively calculated according to every kind of pre-coding scheme, obtains calculated performance and refers to
Mark；
Described selection determines unit, specifically in the calculating obtained according to all pre-coding schemes
In performance indications, a kind of pre-coding scheme selecting the 3rd pre-determined characteristics index maximum is defined as mesh
Mark pre-coding scheme,
Or,
In the calculation of performance indicators obtained according to all pre-coding schemes, select the 4th precordainment
A kind of pre-coding scheme of energy index minimum is defined as target pre-coding scheme；
Coding unit, for determining, according to described selection, the described target precoding side that unit determines
Case carries out precoding to the data message of described all subscriber equipmenies；
First transmitting element, if being nonlinear precoding side for described target pre-coding scheme
Case, sends data message to each described subscriber equipment and indicates described nonlinear precoding side
The indication signaling of case information.
13. base stations according to claim 12, it is characterised in that
Described acquiring unit, specifically for by measuring acquisition at least to the signal received
The described predefined parameter of individual subscriber equipment；
Or,
Specifically for according to receiving the feedback that at least one subscriber equipment sends, obtain described in real time
The described predefined parameter of subscriber equipment.
14. base stations according to claim 12, it is characterised in that
Described first transmitting element, if being non-linear pre-specifically for described target pre-coding scheme
Encoding scheme, sends data message to each described subscriber equipment and carries described non-linear
The instruction letter of pre-coding scheme and/or receiver type corresponding to described nonlinear precoding scheme
Order.
15. base stations according to claim 12, it is characterised in that also include:
Second transmitting element, if being linear predictive coding scheme for described target pre-coding scheme,
Send data message to each described subscriber equipment and carry described linear predictive coding scheme
And/or the indication signaling of receiver type corresponding to described linear predictive coding scheme.
16. 1 kinds of subscriber equipmenies, it is characterised in that including:
Receive unit, for receiving data message and indication signaling, the described instruction that base station sends
The nonlinear precoding scheme information that signaling instruction base station is selected, described nonlinear precoding scheme
For the described base station predefined parameter of all subscriber equipmenies to obtaining according to every kind of pre-coding scheme
It is respectively calculated the calculation of performance indicators obtained, at the meter obtained according to all pre-coding schemes
Calculating in performance indications, a kind of pre-coding scheme selecting the 3rd pre-determined characteristics index maximum is defined as
Target pre-coding scheme, or, in the calculation of performance indicators obtained according to all pre-coding schemes,
A kind of pre-coding scheme selecting the 4th pre-determined characteristics index minimum is defined as target precoding side
Case；
Select unit, for the reception obtained according to the indication signaling received according to reception unit
Machine type selecting receiver；
The described receiver selected, for the described data message receiving described reception unit
Detect.
17. subscriber equipmenies according to claim 16, it is characterised in that also include:
Measuring unit, for by measuring acquisition predefined parameter to the signal received；
Transmitting element, for sending the described predefined parameter obtained to described base station.
18. subscriber equipmenies according to claim 16, it is characterised in that
Described reception unit, specifically for receiving data message and the indication signaling that base station sends,
Described indication signaling carries the base station selected nonlinear precoding scheme determined and/or described non-thread
The receiver type that property pre-coding scheme is corresponding.
19. subscriber equipmenies according to claim 16, it is characterised in that including:
Described reception unit, is additionally operable to receive data message and indication signaling, the institute that base station sends
State indication signaling carry the base station selected linear predictive coding scheme determined and/or described linearly prelist
The receiver type that code scheme is corresponding；
Described selection unit, is additionally operable to according to the receiver type obtained according to described indication signaling
Selective receiver；
The described receiver selected, for the described data message receiving described reception unit
Detect.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057036.4A CN103312432B (en) | 2012-03-06 | A kind of method for precoding, base station and subscriber equipment | |
| PCT/CN2012/087335 WO2013131397A1 (en) | 2012-03-06 | 2012-12-24 | Precoding method, base station and user equipment |
| EP12870616.5A EP2816751B1 (en) | 2012-03-06 | 2012-12-24 | Precoding method, base station and user equipment |
| US14/476,276 US9660707B2 (en) | 2012-03-06 | 2014-09-03 | Precoding method, base station and user equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057036.4A CN103312432B (en) | 2012-03-06 | A kind of method for precoding, base station and subscriber equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103312432A CN103312432A (en) | 2013-09-18 |
| CN103312432B true CN103312432B (en) | 2016-11-30 |
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| EP1841112A1 (en) * | 2005-01-18 | 2007-10-03 | Fujitsu Limited | Transmitting method and transmitting apparatus in ofdm-cdma communication system |
| CN101682384A (en) * | 2007-05-31 | 2010-03-24 | 松下电器产业株式会社 | Radio communication mobile station device and cdd mode judging method |
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