CN106788640A - A kind of matching method of far and near user, terminal device and base station equipment - Google Patents
A kind of matching method of far and near user, terminal device and base station equipment Download PDFInfo
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- CN106788640A CN106788640A CN201610260016.5A CN201610260016A CN106788640A CN 106788640 A CN106788640 A CN 106788640A CN 201610260016 A CN201610260016 A CN 201610260016A CN 106788640 A CN106788640 A CN 106788640A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- Mobile Radio Communication Systems (AREA)
Abstract
Matching method, terminal device and base station equipment the invention provides far and near user.Methods described includes：First terminal receive base station send configuration information, the configuration information be used for inform the first terminal described in base station be its distribution pre-coding matrix set；And calculated based on the configuration information and send optimal channel condition information and the instruction of second channel quality to the base station, when the optimal channel condition information includes that channel quality is optimal corresponding first channel quality indicate, order instruction and pre-coding matrix instruction, the second channel quality indicates to be not more than the average value that the corresponding all channel qualities of all pre-coding matrixes in the pre-coding matrix set are indicated.The method and apparatus that the present invention is provided can improve the pairing probability of far and near user.
Description
Technical field
The present invention relates to the communications field, and in particular to a kind of matching method of far and near user, terminal device and
Base station equipment.
Background technology
It is many that non-orthogonal multiple accesses (Non Orthogonal Multiple Access, NOMA) relative orthogonal
Location accesses (Orthogonal Multiple Access, OMA) and can obtain higher and speed, so as to carry
Power system capacity high.Descending non-orthogonal multiple is accessed and will be standardized in the versions of LTE Release 14,
It is referred to as " multi-user's overlapping transmission " (Multiuser Superposition in the versions of LTE Release 14
Transmission, MUST).MUST allows that different user uses same resource units simultaneously, i.e.,
Physical Resource Block (Physical Radio Block, PRB) in LTE.In NOMA, using same
The different user of PRB needs to be using the far and near user of identical pre-coding matrix, using identical precoding
Matrix refers to that base station has identical vector to the pre-coding matrix that these different users are used.The increasing of NOMA
Benefit just comes from the planisphere superposition of these far and near users.
Far and near user is poor with certain receiving power to needing, or geometry signal to noise ratio difference, receive work(
Rate difference is bigger, and the gain of NOMA is bigger.But, the several of far and near user couple are found in base station under some situations
Rate can diminish, and cause the gain of NOMA to diminish.Such as, when concurrent user number is few, radius of society is small or
When person's pre-coding matrix quantity is more, using the far and near user of identical pre-coding matrix to negligible amounts.Additionally,
In the prior art, base station sends data using the specific pre-coding matrix of user feedback to user, due to
Identical pre-coding matrix need to be used to sending data to far and near user, far and near user is to needing to feed back identical
Pre-coding matrix.
Accordingly, it would be desirable to a kind of new method improves the pairing probability of far and near user, it is not necessary to far and near user couple
To base station feedback identical pre-coding matrix.
The content of the invention
The present invention solve problem be：Improve the pairing probability of far and near user.
A kind of matching method of far and near user is the embodiment of the invention provides, including：First terminal receives base
Stand send configuration information, the configuration information be used for inform base station described in the first terminal be its distribution
Pre-coding matrix set；And calculated based on the configuration information and send optimal letter to the base station
Channel state information and second channel quality are indicated, and the optimal channel condition information includes channel quality most
Corresponding first channel quality instruction, order instruction and pre-coding matrix instruction, the second channel matter when excellent
Amount instruction is not more than the corresponding all channel qualities of all pre-coding matrixes in the pre-coding matrix set and refers to
The average value for showing.
Optionally, methods described also includes：Receive the number that the base station is sent by the first pre-coding matrix
According to, first pre-coding matrix indicated with the second channel quality in the pre-coding matrix set
One of corresponding pre-coding matrix.
Optionally, the optimal pre-coding matrix of first pre-coding matrix and second terminal at least one
Column vector is identical, and the first terminal realizes multi-user's overlapping transmission with the second terminal.
Optionally, each element in the pre-coding matrix set includes that wave beam is indicated and its corresponding pre-
Encoder matrix.
Optionally, it is all precoding squares in the pre-coding matrix set that the second channel quality is indicated
Minimum value in the corresponding all channel qualities instructions of battle array.
The embodiment of the present invention additionally provides a kind of matching method of far and near user, including：Base station generation configuration
Information is simultaneously sent to first terminal, and the configuration information is used to inform that the first terminal is the pre- of its distribution
Encoder matrix set；Receive the first preferred channels status information and second channel that the first terminal sends
Quality is indicated, corresponding first channel when the first preferred channels status information includes that channel quality is optimal
Quality instruction, the first order instruction, the first pre-coding matrix instruction, the second channel quality indicate little
What the corresponding all channel qualities of all pre-coding matrixes were indicated in the pre-coding matrix set is average
Value；And it is designated as described based on the first preferred channels status information or the second channel quality
One terminal is scheduled so that the first terminal realizes multi-user's overlapping transmission with second terminal.
Optionally, it is described to be indicated based on the first preferred channels status information or the second channel quality
For the first terminal be scheduled including：It is described for the first terminal distributes the first pre-coding matrix
First pre-coding matrix is used to send data to the first terminal, and first pre-coding matrix is described
One of with the corresponding pre-coding matrix of the second channel quality instruction in pre-coding matrix set.
Optionally, methods described also includes：Receive the second preferred channels state that the second terminal sends
Information, corresponding 3rd channel quality when the second preferred channels status information includes that channel quality is optimal
Instruction, the second order instruction, the second pre-coding matrix instruction；For the second terminal distributes the second precoding
Matrix, second pre-coding matrix by the second terminal the second order instruction and the second pre-coding matrix
Indicate to determine；And based on second pre-coding matrix, selected in the pre-coding matrix set
First pre-coding matrix, first pre-coding matrix and second pre-coding matrix at least
Individual column vector is identical.
Optionally, each element in the pre-coding matrix set includes that wave beam is indicated and its corresponding pre-
Encoder matrix.
Optionally, it is all precoding squares in the pre-coding matrix set that the second channel quality is indicated
Minimum value in the corresponding all channel qualities instructions of battle array.
The embodiment of the present invention additionally provides a kind of terminal device, including：Receiving unit, for receiving base station
The configuration information of transmission, the configuration information be used for inform the terminal device described in base station be its distribution
Pre-coding matrix set；Computing unit, for calculating optimal channel status letter based on the configuration information
Breath and second channel quality are indicated, correspondence when the optimal channel condition information includes that channel quality is optimal
The first channel quality indicate, order instruction and pre-coding matrix instruction, the second channel quality indicates not
It is average that all channel qualities corresponding more than all pre-coding matrixes in the pre-coding matrix set are indicated
Value；And transmitting element, for sending the optimal channel condition information and described the to the base station
Two channel qualities are indicated.
Optionally, the receiving unit is additionally operable to receive what the base station was sent by the first pre-coding matrix
Data, first pre-coding matrix is referred to the second channel quality in the pre-coding matrix set
Show one of corresponding pre-coding matrix.
Optionally, the optimal pre-coding matrix of first pre-coding matrix and second terminal at least one
Column vector is identical, and the terminal device realizes multi-user's overlapping transmission with the second terminal.
Optionally, each element in the pre-coding matrix set includes that wave beam is indicated and its corresponding pre-
Encoder matrix.
Optionally, it is all precoding squares in the pre-coding matrix set that the second channel quality is indicated
Minimum value in the corresponding all channel qualities instructions of battle array.
The embodiment of the present invention additionally provides a kind of base station equipment, including：Generation unit, configures for generating
Information, the configuration information is used to inform the pre-coding matrix set that first terminal is its distribution；Send single
Unit, for sending the configuration information to the first terminal；Receiving unit, for receiving described first
The the first preferred channels status information and second channel quality that terminal sends are indicated, first preferred channels
Corresponding first channel quality instruction, the first order instruction, first when status information includes that channel quality is optimal
Pre-coding matrix instruction, the second channel quality is indicated to be owned in the no more than pre-coding matrix set
The average value that the corresponding all channel qualities of pre-coding matrix are indicated；And scheduling unit, for based on institute
State the first preferred channels status information or the second channel quality is designated as the first terminal and is adjusted
Degree so that the first terminal realizes multi-user's overlapping transmission with second terminal.
Optionally, the scheduling unit is used for：For the first terminal distributes the first pre-coding matrix, institute
The first pre-coding matrix is stated for sending data to the first terminal, first pre-coding matrix is institute
One of state in pre-coding matrix set with the corresponding pre-coding matrix of the second channel quality instruction.
Optionally, the receiving unit is additionally operable to receive the second preferred channels shape that the second terminal sends
State information, corresponding 3rd channel matter when the second preferred channels status information includes that channel quality is optimal
Amount instruction, the second order instruction, the second pre-coding matrix instruction, the scheduling unit are additionally operable to：For described
Second terminal distributes the second pre-coding matrix, and second pre-coding matrix is used to be sent out to the second terminal
Send data, second pre-coding matrix by the second terminal the second order instruction and the second precoding square
Battle array indicates to determine；And based on second pre-coding matrix, selected in the pre-coding matrix set
Go out first pre-coding matrix, first pre-coding matrix is with second pre-coding matrix at least
One column vector is identical.
Optionally, each element in the pre-coding matrix set includes that wave beam is indicated and its corresponding pre-
Encoder matrix.
Optionally, the second channel quality indicates to be equal to all precodings in the pre-coding matrix set
Minimum value in the corresponding all channel qualities instructions of matrix.
Compared with prior art, technical scheme has advantages below：
In method provided in an embodiment of the present invention, first terminal is not only to the channel status that base station feedback is optimal
Information, also feeds back second channel quality and indicates, and the second channel quality instruction correspond to the base station and be
At least one of the pre-coding matrix set of first terminal distribution pre-coding matrix.With optimal letter
Road quality indicates to compare, and the second channel quality indicates relatively small.The base station is based on first terminal
The optimal channel condition information or second channel quality of feedback are indicated, and combine current other-end feedback
Channel condition information, be that the first terminal is scheduled, make it that multi-user's weight is realized with other-end
Folded transmitting.Compared with the optimal channel condition information of terminal feedback is based only in the prior art, the side
Method can improve the probability of pairing.
Further, the base station first determines second terminal for near-end user, is the second terminal distribution
The second pre-coding matrix of transmission data be the optimal pre-coding matrix of the second terminal, it is then determined that
Precoding square corresponding with the second channel quality instruction in the pre-coding matrix set of first terminal
Battle array, finds out identical with described at least one column vector of second pre-coding matrix in these pre-coding matrixes
The first pre-coding matrix distribute to the first terminal, i.e., described first terminal is defined as remote subscriber,
So, the first terminal can realize multi-user's overlapping transmission with the second terminal.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the matching method of the far and near user that one embodiment of the invention is provided；
Fig. 2 is the schematic flow sheet of the matching method of the far and near user that another embodiment of the present invention is provided；
Fig. 3 is the structured flowchart of the terminal device that one embodiment of the invention is provided；And
Fig. 4 is the structured flowchart of the base station equipment that one embodiment of the invention is provided.
Specific embodiment
As background technology is sayed, far and near user is to needing to feed back the optimal precoding of identical in the prior art
Matrix, and in some cases, using the far and near user of the optimal pre-coding matrix of identical to negligible amounts,
Therefore the probability of far and near user's pairing is smaller.The embodiment of the invention provides a kind of matching somebody with somebody for new far and near user
To method, to improve the pairing probability of far and near user.
A kind of matching method of far and near user is the embodiment of the invention provides, methods described includes：Terminal connects
The configuration information that base station sends is received, the configuration information is used to inform that base station described in the terminal is distributed for it
Pre-coding matrix set；And calculated based on the configuration information and send optimal letter to the base station
Channel state information and second channel quality are indicated, and the optimal channel condition information includes channel quality most
Corresponding first channel quality instruction, order instruction and pre-coding matrix instruction, the second channel matter when excellent
Amount instruction is not more than the corresponding all channel qualities of all pre-coding matrixes in the pre-coding matrix set and refers to
The average value for showing.As can be seen that the terminal is not only to the channel condition information that the base station feedback is optimal,
Also feed back the second channel quality related to the pre-coding matrix set that the base station is distributed to indicate, institute
Stating base station can indicate to be the terminal with the pre-coding matrix set according to the second channel quality
Pre-coding matrix used by distribution transmission data, solves in the prior art because base station is only terminal distribution
The low problem of far and near user's pairing probability caused by the optimal pre-coding matrix of its feedback.
The embodiment of the present invention additionally provides a kind of matching method of far and near user, and methods described includes：Base station
Generation configuration information is simultaneously sent to first terminal, and the configuration information is used to inform that the first terminal is it
The pre-coding matrix set of distribution；Receive the first preferred channels status information that the first terminal sends and
Second channel quality is indicated, and the first preferred channels status information is corresponding when including that channel quality is optimal
The instruction of first channel quality, the first order instruction, the first pre-coding matrix instruction, the second channel quality
The corresponding all channel qualities of all pre-coding matrixes are indicated in indicating to be not more than the pre-coding matrix set
Average value；And be designated as based on the first preferred channels status information or the second channel quality
The first terminal is scheduled so that the first terminal realizes multi-user's overlapping transmission with second terminal.
As can be seen that the first terminal also feeds back not only to the channel condition information that the base station feedback is optimal
The second channel quality related to the pre-coding matrix set that the base station is distributed is indicated, the base station
Pre-coding matrix used by data can be transmitted for first terminal distribution based on the two classes message,
Solve in the prior art because base station is only caused by the optimal pre-coding matrix of its feedback of terminal distribution
The low problem of far and near user's pairing probability.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings
Specific embodiment of the invention is described in detail.
With reference to Fig. 1, Fig. 1 shows the flow of the matching method of the far and near user that one embodiment of the invention is provided
Specific steps are described in detail by figure below.
It will be understood by those skilled in the art that so-called far and near user's pairing is to realize MUST, it is multiple whole
Data are launched at end on same resource units, and base station needs to be terminal distribution pre-coding matrix, when for many
When the pre-coding matrix of individual terminal distribution has at least one identical column vector, the multiple terminal can be real
Existing MUST, that is, form far and near user couple.Usually, terminal needs to survey current channel condition
Amount, then relevant parameter is fed back into base station, base station is scheduled according to the parameter that terminal is fed back.
Step S101, first terminal receives the configuration information that base station sends.
Before the relevant information of the first terminal fed-back channel status, the base station is to the first terminal
Send the configuration information that feedback need to be used.
In certain embodiments, the configuration information includes the follow-up first terminal to the base station feedback
Form that needs are used during information etc..
In the present embodiment, the configuration information be additionally operable to inform the first terminal described in base station be its point
The pre-coding matrix set matched somebody with somebody.
Specifically, the base station can distribute a pre-coding matrix set for the first terminal, described pre-
Encoder matrix set is pre-stored in the base station, and the element in this set is subsequent allocations to described first
Terminal is used for the candidate of the pre-coding matrix for launching data.The base station is by the configuration news institute
State first terminal its corresponding pre-coding matrix set.
In specific implementation, base station can be that the terminal in cell is all respectively allocated a pre-coding matrix set
And inform that what each terminal its corresponding pre-coding matrix set is, does equivalent between base station and terminal
A kind of good agreement.
In certain embodiments, each element in the pre-coding matrix set is pre-coding matrix.
In some embodiments, such as in mixed-beam shaping, each the element bag in the pre-coding matrix set
Wave beam is included to indicate and its corresponding pre-coding matrix.
Step S102, is calculated based on the configuration information and sends optimal CSI and second to the base station
CQI。
In the embodiment of the present invention, the optimal CSI include channel quality it is optimal when a corresponding CQI,
RI and PMI.Those skilled in the art know, when channel quality is optimal corresponding CQI values be it is maximum,
Now pre-coding matrix determined by corresponding RI and PMI is properly termed as optimal pre-coding matrix.Namely
Say, the optimal CSI is the current CSI including maximum CQI for measuring of the first terminal,
This maximum CQI is a CQI.
Unlike the prior art, the terminal also calculates second except calculating the optimal CSI
CQI.In certain embodiments, the 2nd CQI is not more than all pre- in the pre-coding matrix set
The average value of the corresponding all CQI of encoder matrix.In certain embodiments, the 2nd CQI is described
Minimum value in pre-coding matrix set in the corresponding all CQI of all pre-coding matrixes.
The smaller value of the 2nd CQI can be by the pre-coding matrix to the first terminal to be allocated
Order is limited to low order, the first terminal can also be limited into low-order-modulated or low bit- rate etc..
In specific implementation, the base station can receive the optimal CSI and the 2nd CQI that multiple terminals send,
Based on the optimal CSI and the 2nd CQI of these terminals feedback, the base station can distribute pre-coding matrix.
The information of the comprehensive all terminal current feedbacks in base station, is that some terminal distributions are true based on its optimal CSI
Fixed optimal pre-coding matrix, and be some terminal distributions be based on its 2nd CQI determine other ends
The optimal pre-coding matrix at end.So, having multiple terminals can use same pre-coding matrix, i.e., in fact
MUST is showed.
Based on the CQI in the optimal CSI or the 2nd CQI, the base station can also be described
First terminal determines suitable coded system and modulation system etc..
Step S103, receives the data that the base station is sent by the first pre-coding matrix, and described first is pre-
Encoder matrix is one of pre-coding matrix corresponding with the 2nd CQI in the pre-coding matrix set.
As described above, the information of the comprehensive all terminal current feedbacks of base station meeting, is that terminal is scheduled.This
In embodiment, its optimal pre-coding matrix (i.e. described second terminal is distributed in the base station for second terminal
It is near-end user), it is that the first terminal is assigned with first pre-coding matrix (i.e. described first terminal
It is remote subscriber).The optimal pre-coding matrix of first pre-coding matrix and second terminal at least one
Column vector is identical, and the first pre-coding matrix be in the pre-coding matrix set with the 2nd CQI
One of corresponding pre-coding matrix.So, the first terminal realizes MUST with the second terminal.
Because first pre-coding matrix is the precoding square that base station and the first terminal are appointed
Element in battle array set, along with base station knows twoth CQI corresponding with first pre-coding matrix,
Therefore the first terminal is when the data transmitted by first pre-coding matrix are received, Ke Yizheng
Really solve initial data.
In other embodiments, the base station is also possible to distribute its optimal precoding for the first terminal
Matrix, i.e., described first terminal is near-end user, and other-end is assigned as into remote subscriber.
With reference to Fig. 2, Fig. 2 shows the stream of the matching method of the far and near user that another embodiment of the present invention is provided
Specific steps are described in detail by Cheng Tu below.
In step S201, base station generation configuration information is simultaneously sent to first terminal.
In certain embodiments, the configuration information includes the follow-up first terminal to the base station feedback
Form that needs are used during information etc..In the present embodiment, the configuration information is additionally operable to inform described first
Base station described in terminal is the pre-coding matrix set of its distribution.
In certain embodiments, each element in the pre-coding matrix set is pre-coding matrix.
In some embodiments, such as in mixed-beam shaping, each the element bag in the pre-coding matrix set
Wave beam is included to indicate and its corresponding pre-coding matrix.
Specifically, the base station can distribute a pre-coding matrix set for the first terminal, described pre-
Encoder matrix set is pre-stored in the base station, and the element in this set is subsequent allocations to described first
Terminal is used for the candidate of the pre-coding matrix for launching data.The base station is by the configuration news institute
State first terminal its corresponding pre-coding matrix set.
In step S202, the first optimal CSI and the 2nd CQI that the first terminal sends are received.
In the embodiment of the present invention, corresponding first when the first optimal CSI includes that channel quality is optimal
CQI, RI and PMI.Unlike the prior art, the first terminal not only feeds back its optimal CSI,
Also feed back the 2nd CQI.In certain embodiments, the 2nd CQI is not more than the pre-coding matrix collection
The average value of the corresponding all CQI of all pre-coding matrixes in conjunction.In certain embodiments, described second
CQI is the minimum value in the corresponding all CQI of all pre-coding matrixes in the pre-coding matrix set.
The smaller value of the 2nd CQI can be by the pre-coding matrix to the first terminal to be allocated
Order is limited to low order, the first terminal can also be limited into low-order-modulated or low bit- rate etc..
Based on a CQI or the 2nd CQI in the described first optimal CSI, the base station may be used also
Think that the first terminal determines suitable coded system and modulation system etc..
In step S203, the second optimal CSI that second terminal sends is received.
Similar, in the embodiment of the present invention, correspondence when the second optimal CSI includes that channel quality is optimal
The 3rd CQI, the 2nd RI and the 2nd PMI.
In certain embodiments, the 2nd CQI with the first terminal is similar, and the base station can also
Receive the 4th CQI that the second terminal sends.It is described second that 4th CQI is not more than base station
The average value of the corresponding all CQI of all pre-coding matrixes in the pre-coding matrix set of terminal configuration.Than
Such as, the 4th CQI can be owned in the pre-coding matrix set that base station is second terminal configuration
Minimum value in the corresponding all CQI of pre-coding matrix.
More than, method provided in an embodiment of the present invention is illustrated by taking two terminals as an example.It is understood that,
In actual applications, the base station can receive more terminals transmission optimal CSI and extra one
CQI, the optimal CSI and the extra CQI of comprehensive these terminals feedback, the base station can be distributed pre-
Encoder matrix, wherein, it is that some terminal distributions are the optimal precoding squares determined based on its optimal CSI
Battle array, and be some terminal distributions be the other-end determined based on its extra CQI optimal precoding
Matrix.So, having multiple terminals can use same pre-coding matrix, that is, realize MUST.
It is that it is carried out based on the information that the first terminal and the second terminal send in step S204
Scheduling.
In specific implementation, the base station determines near-end user first, will certain terminal feedback it is optimal
Pre-coding matrix distributes to the terminal to launch data.Then, it is corresponding pre- in other-end based on this
All precoding squares corresponding with the extra CQI that the other-end feeds back are selected in encoder matrix set
Battle array, then the optimal pre-coding matrix with the near-end user is found out in the pre-coding matrix selected
There is the pre-coding matrix of common column vector.Such as, the optimal pre-coding matrix of the near-end user for [c1,
C2], and the pre-coding matrix selected has [c1] and [c3].Because [c1] and [c1, c2] has common row
Vector, therefore the base station can use [c1, c2] to launch data, not only the near-end user can connect
Data are received, the other-end can also receive the data transmitted on [c1] this code stream.Here institute
Stating other-end just turns into remote subscriber, and the near-end user and remote subscriber realize MUST.
In certain embodiments, the base station combines the feedback information being currently received, and is the second terminal
The second pre-coding matrix is distributed, second pre-coding matrix is the optimal precoding square of the second terminal
Battle array, i.e., corresponding 2nd RI and the 2nd PMI is determined when the channel quality of described second terminal feedback is optimal
Pre-coding matrix.Afterwards, the base station is in the pre-coding matrix collection configured for the first terminal
All pre-coding matrixes corresponding with the 2nd CQI that the first terminal feeds back are selected in conjunction, then in institute
State find out in the pre-coding matrix selected with the optimal pre-coding matrix of the second terminal have common column to
First pre-coding matrix of amount.So, the base station can be using second pre-coding matrix to described
First terminal and second terminal transmitting data, what simply the first terminal was received is described first
Data on the corresponding code stream of pre-coding matrix, the second terminal and the first terminal are achieved that
MUST.It will be understood by those skilled in the art that " the second precoding square of use described in present specification
Battle array launches data to second terminal " and " launching data to first terminal using the first pre-coding matrix " is in fact
Referred on border " launch data to first terminal and second terminal using the second pre-coding matrix, wherein the
What one terminal was received is the data on the corresponding code stream of the first pre-coding matrix ".
In specific implementation, first pre-coding matrix includes second pre-coding matrix.At some
In embodiment, the order of the order more than first pre-coding matrix of second pre-coding matrix.
Technical scheme is described below by a specific example, on more fully understanding
State embodiment.
Base station is to letters such as the forms used in its optimal CSI of feedback of the configuration of terminal UE 1 and extra CQI feedback
Breath, and the terminal UE 1 its corresponding pre-coding matrix set is informed by configuration information.
Terminal UE 1 receive base station transmission with postponing, calculate optimal CSI and extra CQI, and
Feed back to base station.In fact, terminal UE 1 and base station have been appointed, base station after feedback information is received,
Can be according to extra CQI for terminal UE 1 selects suitable modulation, coded format, and based on above-mentioned
Extra CQI can select a suitable precoding square in the corresponding pre-coding matrix set of terminal UE 1
Battle array is launched terminal UE 1, and so, terminal UE 1 can be correctly decoded.
It is understood that not only terminal UE 1 does so, all terminals are all according to above-mentioned flow in cell
Come, that is to say, that base station can receive the feedback information from multiple terminals.Base station is according to all terminals
The optimal CSI and extra CQI of feedback are scheduled.
For example, the RI that include of optimal CSI of the feedback of terminal UE 2 and the corresponding optimal precodings of PMI
Matrix is M1=[v1, v2], CQI=[9 10], and the extra CQI of the feedback of terminal UE 1 is 1, terminal UE 1
The pre-coding matrix collection being configured is combined into A, if pre-coding matrix set A includes [v1] or [v2], that
, base station may decide that the optimal pre-coding matrix M1 of using terminal UE2 to launch data, so,
Not only terminal UE 2 can receive related data, terminal UE 1 can also receive v1 in M1 or
Data on v2 code streams.That is, base station terminal UE 2 is dispatched in v1 as near-end user and
V2 layers, dispatched at v1 layers or v2 layers using terminal UE 1 as remote subscriber, it is achieved thereby that MUST.
In above example, illustrated by taking two terminals as an example, however, the present invention is not limited thereto,
In practical application, there may be more terminals.
Above-mentioned specific embodiment is applied to cell special reference (Cell-specific Reference
Signals, CRS) situation, or non-precoded channel state information reference signals (Channel State
Information-Reference Signal, CSI-RS) situation, or in beam forming optimal CSI and
The situation that extra CQI can only send out in same wave beam.
For the situation that optimal CSI in beam forming and extra CQI send out in different beams, can adopt
Use following methods.Different from above-mentioned specific embodiment, base station is the pre-coding matrix collection of the configuration of terminal UE 1
Closing each element in CA includes that wave beam is indicated and its corresponding pre-coding matrix.For example, terminal UE 2
The RI that include of optimal CSI and the corresponding optimal pre-coding matrixes of PMI of feedback be M1=[b1v1,
B1v2], CQI=[9 10], the extra CQI of the feedback of terminal UE 1 is 1, and what terminal UE 1 was configured prelists
Code set of matrices is CA, if pre-coding matrix set CA includes [b1v1] or [b1v2], then, base
Station may decide that the optimal pre-coding matrix M1 of using terminal UE2 to launch data, so, not only eventually
End UE2 can receive related data, and terminal UE 1 can also receive the b1v1 or b1v2 in M1
Data on code stream.That is, base station terminal UE 2 is dispatched in b1v1 as near-end user and
B1v2 layers, dispatched at b1v1 layers or b1v2 layers using terminal UE 1 as remote subscriber, it is achieved thereby that
MUST。
It is understood that, the extra CQI in above-mentioned two specific embodiment is retouched in being previous embodiment
2nd CQI of the first terminal stated.
Correspondingly, one embodiment of the invention additionally provides a kind of terminal device.Refer to Fig. 3, described first
Terminal device 300 includes：Receiving unit 301, the configuration information for receiving base station transmission, the configuration
Information be used for inform the first terminal equipment 300 described in base station be its distribution pre-coding matrix set；
Computing unit 302, it is described optimal for calculating optimal CSI and the 2nd CQI based on the configuration information
CSI corresponding CQI, RI and a PMI when including that channel quality is optimal, the 2nd CQI is little
What the corresponding all channel qualities of all pre-coding matrixes were indicated in the pre-coding matrix set is average
Value；And transmitting element 303, for sending the optimal CSI and the 2nd CQI to the base station.
In certain embodiments, the configuration information includes the follow-up first terminal equipment 300 to described
Form that needs are used during base station feedback information etc..In certain embodiments, the pre-coding matrix set
In each element be pre-coding matrix.In certain embodiments, such as it is described in mixed-beam shaping
Each element in pre-coding matrix set includes that wave beam is indicated and its corresponding pre-coding matrix.
In certain embodiments, the 2nd CQI is all precoding squares in the pre-coding matrix set
Minimum value in the corresponding all channel qualities instructions of battle array.The smaller value of the 2nd CQI will can be treated
The order for distributing to the pre-coding matrix of the first terminal equipment 300 is limited to low order, can also be described
First terminal equipment 300 is limited to low-order-modulated or low bit- rate etc..
Based on the CQI in the optimal CSI or the 2nd CQI, the base station can also be described
First terminal equipment 300 determines suitable coded system and modulation system etc..
In certain embodiments, the receiving unit 301 is additionally operable to receive the base station and is prelisted by first
The data that code matrix sends, first pre-coding matrix is with described the in the pre-coding matrix set
One of corresponding pre-coding matrixes of two CQI.
In certain embodiments, the optimal precoding square of first pre-coding matrix and second terminal equipment
At least one column vector of battle array is identical, and the first terminal equipment 300 is realized with the second terminal equipment
MUST。
In specific implementation, the information of the comprehensive all terminal device current feedbacks of base station meeting, is terminal device
It is scheduled.In the present embodiment, the base station is that the second terminal equipment distributes its optimal precoding
Matrix (i.e. described second terminal equipment is near-end user), is that the first terminal equipment 300 is assigned with institute
State the first pre-coding matrix (i.e. described first terminal equipment 300 is remote subscriber).First precoding
At least one column vector is identical with the optimal pre-coding matrix of second terminal equipment for matrix, and first pre-
Encoder matrix is one of pre-coding matrix corresponding with the 2nd CQI in the pre-coding matrix set.
So, the first terminal equipment 300 realizes MUST with the second terminal equipment.
In certain embodiments, the receiving unit 301 and the transmitting element 303 can be wireless receipts
Hair equipment；The computing unit 302 can be processor, such as CPU, MCU, DSP etc..
One embodiment of the invention provides a kind of base station equipment.Fig. 4 is refer to, the base station equipment 400 is wrapped
Include：Generation unit 401, for generating configuration information, the configuration information is used to inform that first terminal is it
The pre-coding matrix set of distribution；Transmitting element 402, for sending described with confidence to the first terminal
Breath；Receiving unit 403, for receiving the first optimal CSI and the 2nd CQI that the first terminal sends,
A corresponding CQI, a RI, a PMI when the first optimal CSI includes that channel quality is optimal,
2nd CQI is not more than the corresponding all channels of all pre-coding matrixes in the pre-coding matrix set
The average value that quality is indicated；And scheduling unit 404, for based on the described first optimal CSI or described
Two CQI are scheduled for the first terminal so that the first terminal realizes MUST with second terminal.
In certain embodiments, the configuration information includes the follow-up first terminal to the base station equipment
Form that needs are used during 400 feedback information etc..
In certain embodiments, each element in the pre-coding matrix set is pre-coding matrix.
In some embodiments, such as in mixed-beam shaping, each the element bag in the pre-coding matrix set
Wave beam is included to indicate and its corresponding pre-coding matrix.
In certain embodiments, the 2nd CQI is equal to all precodings in the pre-coding matrix set
Minimum value in the corresponding all channel qualities instructions of matrix.
In certain embodiments, the scheduling unit 404 is used for：For first terminal distribution first is pre-
Encoder matrix, first pre-coding matrix is used to send data to the first terminal, and described first is pre-
Encoder matrix is one of pre-coding matrix corresponding with the 2nd CQI in the pre-coding matrix set.
In certain embodiments, the receiving unit 403 is additionally operable to receive that the second terminal sends the
Corresponding 3rd CQI, second when two optimal CSI, the second optimal CSI include that channel quality is optimal
RI, the 2nd PMI, the scheduling unit 404 are additionally operable to：For the second terminal distributes the second precoding
Matrix, second pre-coding matrix is used to send data, second precoding to the second terminal
Matrix is indicated to determine by the 2nd RI of the second terminal and the 2nd PMI；And prelisted based on described second
Code matrix, selects first pre-coding matrix in the pre-coding matrix set, and described first is pre-
Encoder matrix is identical with described at least one column vector of second pre-coding matrix.
In certain embodiments, the receiving unit 403 is additionally operable to receive that the second terminal sends the
Four CQI.4th CQI is not more than in the pre-coding matrix set that base station is the second terminal configuration
The average value of the corresponding all CQI of all pre-coding matrixes.Such as, the 4th CQI can be base station
For in the corresponding all CQI of all pre-coding matrixes in the pre-coding matrix set of second terminal configuration
Minimum value.
It is understood that, in actual applications, the base station equipment 400 can receive more terminals
The optimal CSI and an extra CQI for sending, the optimal CSI and the volume of comprehensive these terminals feedback
Outer CQI, the base station equipment 400 can distribute pre-coding matrix, wherein, it is some terminal distributions
Be the optimal pre-coding matrix determined based on its optimal CSI, and be that some terminal distributions are based on it
The optimal pre-coding matrix of the other-end that extra CQI determines.So, having multiple terminals can make
Same pre-coding matrix is used, that is, realizes MUST.
The base station equipment 400 combines the feedback information being currently received, and is the second terminal equipment distribution
Second pre-coding matrix, second pre-coding matrix is the optimal precoding square of the second terminal equipment
Battle array, i.e., corresponding 2nd RI and the 2nd PMI when the channel quality of described second terminal equipment feedback is optimal
Identified pre-coding matrix.Afterwards, the base station equipment 400 is being the first terminal device configuration
The pre-coding matrix set in select with the first terminal equipment feed back the 2nd CQI it is corresponding
All pre-coding matrixes, then found out in the pre-coding matrix selected and the second terminal equipment
Optimal pre-coding matrix have the first pre-coding matrix of common column vector.So, the base station equipment 400
Can be launched to the first terminal equipment and the second terminal equipment using second pre-coding matrix
Data, what simply the first terminal equipment was received is on the corresponding code stream of first pre-coding matrix
Data, the second terminal equipment and the first terminal equipment are achieved that MUST.
In certain embodiments, the transmitting element 402 and the receiving unit 403 can be wireless receipts
Hair equipment；The generation unit 401 and the scheduling unit 404 can be processors, such as CPU,
MCU, DSP etc..
To sum up, in method and apparatus provided in an embodiment of the present invention, first terminal not only to base station feedback most
Excellent channel condition information, also feeds back second channel quality and indicates, and the second channel quality indicates correspondence
At least one of the pre-coding matrix set that the base station is first terminal distribution precoding square
Battle array.Compared with optimal channel quality is indicated, the second channel quality indicates relatively small.The base
Stand and be based on optimal channel condition information or the instruction of second channel quality of first terminal feedback, and combination is worked as
The channel condition information of preceding other-end feedback, is that the first terminal is scheduled, and makes it with other ends
Realize multi-user's overlapping transmission in end.Believe with the optimal channel status for being based only on terminal feedback in the prior art
Manner of breathing ratio, methods described can improve the probability of pairing.
Further, the base station first determines second terminal for near-end user, is the second terminal distribution
The second pre-coding matrix of transmission data be the optimal pre-coding matrix of the second terminal, it is then determined that
Precoding square corresponding with the second channel quality instruction in the pre-coding matrix set of first terminal
Battle array, finds out identical with described at least one column vector of second pre-coding matrix in these pre-coding matrixes
The first pre-coding matrix distribute to the first terminal, i.e., described first terminal is defined as remote subscriber,
So, the first terminal can realize multi-user's overlapping transmission with the second terminal.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore guarantor of the invention
Shield scope should be defined by claim limited range.
Claims (20)
1. a kind of matching method of far and near user, it is characterised in that including：
First terminal receives the configuration information that base station sends, and the configuration information is used to inform described first
Base station described in terminal is the pre-coding matrix set of its distribution；And
Calculated based on the configuration information and send optimal channel condition information and the to the base station
Two channel qualities are indicated, and the optimal channel condition information is corresponding the when including that channel quality is optimal
The instruction of one channel quality, order instruction and pre-coding matrix instruction, the second channel quality indicates little
All corresponding all channel qualities instructions of pre-coding matrix puts down in the pre-coding matrix set
Average.
2. the method for claim 1, it is characterised in that also include：The base station is received by first
The data that pre-coding matrix sends, first pre-coding matrix be in the pre-coding matrix set with
The second channel quality indicates one of corresponding pre-coding matrix.
3. method as claimed in claim 2, it is characterised in that first pre-coding matrix and second terminal
Optimal pre-coding matrix at least one column vector it is identical, the first terminal and the second terminal
Realize multi-user's overlapping transmission.
4. the method for claim 1, it is characterised in that each unit in the pre-coding matrix set
Element includes that wave beam is indicated and its corresponding pre-coding matrix.
5. the method for claim 1, it is characterised in that it is described pre- that the second channel quality is indicated
Minimum value during the corresponding all channel qualities of all pre-coding matrixes are indicated in encoder matrix set.
6. a kind of matching method of far and near user, it is characterised in that including：
Base station generation configuration information is simultaneously sent to first terminal, and the configuration information is used to inform described the
One terminal is the pre-coding matrix set of its distribution；
The the first preferred channels status information and second channel quality for receiving the first terminal transmission refer to
Show, corresponding first channel quality when the first preferred channels status information includes that channel quality is optimal
Instruction, the first order instruction, the first pre-coding matrix instruction, the second channel quality indicate to be not more than
What the corresponding all channel qualities of all pre-coding matrixes were indicated in the pre-coding matrix set is average
Value；And
Described is designated as based on the first preferred channels status information or the second channel quality
One terminal is scheduled so that the first terminal realizes multi-user's overlapping transmission with second terminal.
7. method as claimed in claim 6, it is characterised in that described based on the first preferred channels state
Information or the second channel quality be designated as the first terminal be scheduled including：It is described first
The pre-coding matrix of terminal distribution first, first pre-coding matrix is used to be sent to the first terminal
Data, first pre-coding matrix be in the pre-coding matrix set with the second channel quality
Indicate one of corresponding pre-coding matrix.
8. method as claimed in claim 7, it is characterised in that also include：
Receive the second preferred channels status information that the second terminal sends, second preferred channels
Corresponding 3rd channel quality instruction, the second order instruction, the when status information includes that channel quality is optimal
Two pre-coding matrix instructions；
It is that the second terminal distributes the second pre-coding matrix, second pre-coding matrix is by described the
Second order instruction of two terminals and the second pre-coding matrix instruction determine；And
Based on second pre-coding matrix, described first is selected in the pre-coding matrix set
Pre-coding matrix, first pre-coding matrix and second pre-coding matrix at least one arrange to
Amount is identical.
9. method as claimed in claim 6, it is characterised in that each unit in the pre-coding matrix set
Element includes that wave beam is indicated and its corresponding pre-coding matrix.
10. method as claimed in claim 6, it is characterised in that it is described pre- that the second channel quality is indicated
Minimum value during the corresponding all channel qualities of all pre-coding matrixes are indicated in encoder matrix set.
A kind of 11. terminal devices, it is characterised in that including：
Receiving unit, the configuration information for receiving base station transmission, the configuration information is used to inform institute
State the pre-coding matrix set that base station described in terminal device is its distribution；
Computing unit, for calculating optimal channel condition information and the second letter based on the configuration information
Road quality is indicated, the optimal channel condition information corresponding first letter when including that channel quality is optimal
Road quality is indicated, order instruction and pre-coding matrix instruction, and the second channel quality indicates to be not more than institute
State the average value that the corresponding all channel qualities of all pre-coding matrixes in pre-coding matrix set are indicated；
And
Transmitting element, for sending the optimal channel condition information and described second to the base station
Channel quality is indicated.
12. terminal devices as claimed in claim 11, it is characterised in that the receiving unit is additionally operable to receive
The data that the base station is sent by the first pre-coding matrix, first pre-coding matrix is described pre-
One of with the corresponding pre-coding matrix of the second channel quality instruction in encoder matrix set.
13. terminal devices as claimed in claim 12, it is characterised in that first pre-coding matrix and
At least one column vector of the optimal pre-coding matrix of two terminals is identical, the terminal device and described
Two terminals realize multi-user's overlapping transmission.
14. terminal devices as claimed in claim 11, it is characterised in that in the pre-coding matrix set
Each element includes that wave beam is indicated and its corresponding pre-coding matrix.
15. terminal devices as claimed in claim 11, it is characterised in that the second channel quality indicate be
During the corresponding all channel qualities of all pre-coding matrixes are indicated in the pre-coding matrix set most
Small value.
A kind of 16. base station equipments, it is characterised in that including：
Generation unit, for generating configuration information, the configuration information is used to inform that first terminal is it
The pre-coding matrix set of distribution；
Transmitting element, for sending the configuration information to the first terminal；
Receiving unit, for receiving the first preferred channels status information that the first terminal sends and the
Two channel qualities are indicated, and the first preferred channels status information is corresponding when including that channel quality is optimal
The instruction of first channel quality, the first order instruction, the first pre-coding matrix instruction, the second channel matter
Amount instruction is not more than the corresponding all channel matter of all pre-coding matrixes in the pre-coding matrix set
The average value of amount instruction；And
Scheduling unit, for based on the first preferred channels status information or the second channel quality
It is designated as the first terminal to be scheduled so that the first terminal realizes multi-user with second terminal
Overlapping transmission.
17. base station equipments as claimed in claim 16, it is characterised in that the scheduling unit is used for：For institute
State first terminal and distribute the first pre-coding matrix, first pre-coding matrix is used for described first eventually
End sends data, first pre-coding matrix be in the pre-coding matrix set with the described second letter
Road quality indicates one of corresponding pre-coding matrix.
18. base station equipments as claimed in claim 17, it is characterised in that the receiving unit is additionally operable to receive
The second preferred channels status information that the second terminal sends, the second preferred channels status information
Including channel quality it is optimal when corresponding 3rd channel quality instruction, the second order instruction, the second precoding
Matrix is indicated, and the scheduling unit is additionally operable to：For the second terminal distributes the second pre-coding matrix,
Second pre-coding matrix is used to send data, second pre-coding matrix to the second terminal
Determined by second order instruction and the second pre-coding matrix instruction of the second terminal；And based on described
Second pre-coding matrix, selects first pre-coding matrix in the pre-coding matrix set,
First pre-coding matrix is identical with described at least one column vector of second pre-coding matrix.
19. base station equipments as claimed in claim 16, it is characterised in that in the pre-coding matrix set
Each element includes that wave beam is indicated and its corresponding pre-coding matrix.
20. base station equipments as claimed in claim 16, it is characterised in that described second channel quality instruction etc.
During the corresponding all channel qualities of all pre-coding matrixes are indicated in the pre-coding matrix set
Minimum value.
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