CN106301507A - A kind of channel condition information measures feedback method - Google Patents
A kind of channel condition information measures feedback method Download PDFInfo
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- CN106301507A CN106301507A CN201510251574.0A CN201510251574A CN106301507A CN 106301507 A CN106301507 A CN 106301507A CN 201510251574 A CN201510251574 A CN 201510251574A CN 106301507 A CN106301507 A CN 106301507A
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0675—Space-time coding characterised by the signaling
- H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]
Abstract
The invention provides a kind of channel condition information and measure feedback method.Base station sends CSI-RS by N number of antenna element corresponding to described N number of port respectively in M/N the moment in each cycle, feeds back to base station when making N number of antenna element that user terminal often obtains to the channel matrix of user terminal；Receive N number of antenna element channel matrix to user terminal of described user terminal feedback, if current the M/N the channel matrix that channel matrix is this cycle obtained, M/N the channel matrix then this cycle obtained, corresponding relation according to N number of antenna port M/N moment in this cycle Yu N number of antenna element, the channel matrix obtained in this cycle merges, channel matrix as M antenna element of this cycle to described user terminal, limited port is used to realize the transmission of multiple antenna element, it is obtained in that the channel condition information of more antennas port, and save pilot-frequency expense.
Description
Technical field
The present invention relates to communication technical field, measure feedback method particularly to a kind of channel condition information.
Background technology
The introducing of active antenna so that 3D MIMO technology is possibly realized, namely can except level dimension
To utilize multiple antennas to carry out wave beam forming and spatial reuse, multiple antennas can also be utilized in the vertical dimension. to enter
Mobile state angle of declination adjusts, and comes the position of the vertical dimensions according to UE, and the wave beam adjusting vertical dimensions is composed
Shape direction.
Application 3D MIMO technology, except measuring the channel state information reference signals of horizontal dimensions
(CSI-RS) outside, in addition it is also necessary to the CSI-RS of vertical dimensions is measured.Owing to horizontal dimensions is
Measure CSI-RS and obtain channel condition information, feed back to base station, thus complete the various biographies of multiple antennas
Transmission scheme, and the direction of vertical dimensions vertical dimensions to be capable of wave beam forming adjusts, it is also desirable to measure
The CSI-RS of vertical dimensions obtains the channel condition information of vertical dimensions.
System uses the two-dimensional antenna array of big quantity, needs the definition CSI-RS more than 8 antenna ports
Configuration, along with the increase of antenna element number, it is proportional increase that CSI-RS sends port number, to the greatest extent
Pipe is considered that the CSI-RS being simply extended to more than 8 ports, but can be very big on standardization impact,
And the problem that pilot-frequency expense is big can be brought.
Summary of the invention
In view of this, the application provides a kind of channel condition information to measure feedback method, opens solving pilot tone
Sell big problem.
For solving above-mentioned technical problem, the technical scheme of the application is achieved in that
A kind of CSI measures feedback method, and the method includes:
Base station sends information for M antenna element, configuration CSI-RS, and described CSI-RS sends letter
Breath is: N number of antenna port, and described N number of antenna port is in M/N the moment pair in each cycle
The N number of antenna element answered；Wherein, N and M is the integer more than 0, and M/N is integer；
N number of sky that described N number of port is corresponding is passed through, in M/N the moment in each cycle, respectively in this base station
Linear array sends CSI-RS, makes N number of antenna element that user terminal often obtains to the channel of user terminal
During matrix, feed back to base station；
This base station receives N number of antenna element channel matrix to user terminal of described user terminal feedback,
If current the M/N the channel matrix that channel matrix is this cycle obtained, then this cycle is obtained
M/N channel matrix, according to N number of antenna port at M/N moment and N number of antenna array in this cycle
The corresponding relation of son, the channel matrix obtained in this cycle merges, arrives as M antenna element of this cycle
The channel matrix of described user terminal.
A kind of CSI measures feedback method, and the method includes:
User terminal receives the CSI-RS of the described base station configuration that base station sends and sends information, obtains institute
State CSI-RS send information and store；Described CSI-RS sends information: N number of antenna port, and
Described N number of antenna port is in N number of antenna element corresponding to M/N the moment in each cycle；Wherein,
N and M is the integer more than 0, and M/N is integer；
Described user terminal receives the CSI-RS that base station sends, it is thus achieved that N number of antenna element is to this user
The channel matrix of terminal；
If current the M/N the channel matrix that channel matrix is current period obtained, then according to storage
N number of antenna port M/N moment in this cycle and the corresponding relation of N number of antenna element, by this week
The channel matrix that phase obtains merges, as the channel square of M antenna element of this cycle to this user terminal
Battle array, and feed back to base station.
From technical scheme above, in the application, base station configuration is less than the antenna end of antenna element number
Mouthful, and each antenna port being mapped to the most in the same time in different antenna element a cycle, use
Limited port realizes the transmission of multiple antenna element, it is possible to obtain the channel status letter of more antennas port
Breath, and save pilot-frequency expense.
Accompanying drawing explanation
Fig. 1 is the signal of a corresponding laterally antenna element of cycle internal antenna port in the embodiment of the present application
Figure；
Fig. 2 is the signal in an internal antenna port correspondence Longitudinal Antenna a period of time in cycle in the embodiment of the present application
Figure；
Fig. 3 is that in the embodiment of the present application one, CSI measures feedback method schematic flow sheet；
Fig. 4 is that in the embodiment of the present application two, CSI measures feedback method schematic flow sheet.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, the most also
For embodiment, technical scheme is described in detail.
Thering is provided a kind of CSI to measure feedback method in the embodiment of the present application, base station configuration is less than antenna element
The antenna port of number, and each antenna port is mapped to different antenna element the most in the same time a cycle
On, use limited port to realize the transmission of multiple antenna element, it is possible to obtain more antennas port
Channel condition information, and save pilot-frequency expense.
In the embodiment of the present application, base station sends information, institute for M antenna element, configuration CSI-RS
Stating CSI-RS transmission information is: N number of antenna port, and described N number of antenna port is in each cycle
N number of antenna element corresponding to M/N moment；Wherein, N and M is the integer more than 0, and
M/N is integer.
When implementing, as 16 antenna element, it is possible to use 4 antenna ports realize, such as 4
Individual antenna port is respectively antenna port 1, antenna port 2, antenna port 3 and antenna port 4；16
Individual antenna element is respectively antenna element 1, antenna element 2 ... antenna element 16, then a cycle
Needed for points 4 (16/4) individual moment sent a CSI-RS, antenna element in the cycle and antenna port
Corresponding relation is: first moment corresponding 4 different antenna element of 4 antenna ports, when second
Carve 4 different antenna element in corresponding other 12 antenna element of 4 antenna ports, when the 3rd
Carve 4 different antenna element in corresponding other 8 antenna element of 4 antenna ports, when the 4th
Carve 4 different antennae a period of time in corresponding remaining 4 antenna element of 4 antenna element.
Visible, in four moment in a cycle, the corresponding different antenna element of each port, and one
The individual cycle corresponds to all antenna element.
The application provides the following corresponding relation of antenna port and antenna element:
Described N is the antenna array subnumber that M antenna element is transversely arranged, or the antenna array of longitudinal arrangement
Subnumber, N number of antenna element that i.e. per the moment is corresponding is horizontal antenna array subnumber or Longitudinal Antenna a period of time number.
Below in conjunction with the accompanying drawings, antenna port and the relation of antenna element are described in detail.
Seeing Fig. 1, Fig. 1 is a corresponding laterally antenna array of cycle internal antenna port in the embodiment of the present application
The schematic diagram of son.Fig. 1 is with 16 antenna element, as a example by configuring 4 antenna ports.Dotted line in Fig. 1
Antenna represents in 4 antenna element that corresponding 4 ports of moment are corresponding, by the corresponding pass shown in Fig. 1
System, can send CSI-RS by each antenna element in the cycle.
Fig. 1 is only a kind of citing, as long as in corresponding 4 horizontal antenna element of each moment in this cycle
, as can also the antenna element shown in the 2nd moment corresponding 1st dotted line that the moment is corresponding, the
3 moment corresponding 2nd antenna element shown in the dotted line that the moment is corresponding, the 4th moment the corresponding 3rd
The antenna element shown in dotted line that the individual moment is corresponding, the 1st moment corresponding 4th dotted line that the moment is corresponding
Shown antenna element etc..
Seeing Fig. 2, Fig. 2 is a cycle internal antenna port correspondence Longitudinal Antenna battle array in the embodiment of the present application
The schematic diagram of son.With 32 antenna element in Fig. 2, as a example by configuring 8 antenna ports.Void in Fig. 2
Wire antenna represents in 8 antenna element that corresponding 8 ports are corresponding, by the corresponding pass shown in Fig. 2
System, can send CSI-RS by each antenna element in the cycle.
Fig. 1 is only a kind of citing, as long as in corresponding 8 longitudinal antenna element of each moment in this cycle
, as can also the antenna element shown in the 2nd moment corresponding 1st dotted line that the moment is corresponding, the
3 moment corresponding 2nd antenna element shown in the dotted line that the moment is corresponding, the 4th moment the corresponding 3rd
The antenna element shown in dotted line that the individual moment is corresponding, the 1st moment corresponding 4th dotted line that the moment is corresponding
Shown antenna element etc..
Below in conjunction with the accompanying drawings, describe how the application realizes CSI-RS measurement feedback in detail.
Embodiment one
Seeing Fig. 3, Fig. 3 is that in the embodiment of the present application one, CSI measures feedback method schematic flow sheet.Tool
Body step is:
Step 301, base station is corresponding by described N number of port respectively in M/N the moment in each cycle
N number of antenna element sends CSI-RS, makes N number of antenna element that user terminal often obtains to user terminal
Channel matrix time, feed back to base station.
Step 302, this base station receives N number of antenna element of described user terminal feedback and arrives user terminal
Channel matrix.
Step 303, if current the M/N the channel matrix that channel matrix is this cycle obtained, this base
Stand M/N the channel matrix that this cycle is obtained, according to N number of antenna port M/N of this cycle
Moment and the corresponding relation of N number of antenna element, the channel matrix obtained in this cycle merges, as this week
M antenna element of phase is to the channel matrix of described user terminal.
When N is the transversely arranged antenna array subnumber of M antenna element, and described N number of antenna element is to using
The channel matrix of family terminal is Q × N-dimensional degree matrix, and described M antenna element is to described user terminal
Channel matrix is (Q × M/N) × N latitude matrix；Wherein, Q is the sky that user terminal receives CSI-RS
Line number, and be the integer more than 0；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, described N number of antenna element is to using
The channel matrix of family terminal is N × 1 dimensional matrix, and described M antenna element is to described user terminal
Channel matrix is N × (Q × M/N) latitude matrix.
As a example by Fig. 1, for a cycle, base station is the most in the same time according to antenna port and antenna element
Corresponding relation send CSI-RS.
User terminal receives the CSI-RS that base station sends, it is thus achieved that the letter of 4 antenna element to this user terminal
Road matrix, when this user terminal uses 1 reception antenna, in a moment in a cycle, this use
The channel matrix that family terminal obtains is 1 × 4 latitude matrix, and the channel matrix feedback that each moment is obtained to
Base station.
Assume the matrix [H11 H12 H13 H14] that channel matrix is 1 × 4 dimension of the 1st moment channel feedback,
The channel matrix of the 2nd moment user terminal feedback is 1 × 4 dimensional matrix [H21 H22 H23 H24], the
The matrix [H31 H32 H33 H34] that channel matrix is 1 × 4 dimension of 3 moment user terminal feedbacks, the 4th
The channel matrix of moment user terminal feedback is the matrix [H41 H42 H43 H44] of 1 × 4 dimension, by respectively
The channel matrix in 4 moment is merged by the corresponding relation of moment antenna port and antenna element, so that it may
To obtain whole 16 antennas channel matrix to user terminal, specific as follows:
Embodiment two
Seeing Fig. 4, Fig. 4 is that in the embodiment of the present application two, CSI measures feedback method schematic flow sheet.Tool
Body step is:
Step 401, user terminal receives the CSI-RS of the described base station configuration that base station sends and sends letter
Breath, obtains described CSI-RS and sends information and store.
Base station, after configuration CSI-RS transmission information, notifies that, to user terminal, user terminal storage receives
The CSI-RS arrived sends information, for merging M the antenna element channel matrix to this user terminal.
Step 402, this user terminal receives the CSI-RS that base station sends, it is thus achieved that N number of antenna element arrives
The channel matrix of this user terminal.
Step 403, if current the M/N the channel matrix that channel matrix is current period obtained, should
User terminal according to N number of antenna port of storage in M/N moment in this cycle and N number of antenna element
Corresponding relation, the channel matrix that this cycle is obtained merge, as M antenna element of this cycle to
The channel matrix of user terminal, and feed back to base station.
When N is the transversely arranged antenna array subnumber of M antenna element, and described N number of antenna element is to using
The channel matrix of family terminal is Q × N-dimensional degree matrix, and described M antenna element is to described user terminal
Channel matrix is (Q × M/N) × N latitude matrix；Wherein, Q is the sky that user terminal receives CSI-RS
Line number；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, described N number of antenna element is to using
The channel matrix of family terminal is N × 1 dimensional matrix, and described M antenna element is to described user terminal
Channel matrix is N × (Q × M/N) latitude matrix.
As a example by Fig. 2, for a cycle, base station is the most in the same time according to antenna port and antenna element
Corresponding relation send CSI-RS.
User terminal receives the CSI-RS that base station sends, it is thus achieved that the letter of 8 antenna element to this user terminal
Road matrix, when this user terminal uses 1 reception antenna, in a moment in a cycle, this use
The channel matrix that family terminal obtains is 8 × 1 latitude matrixes, receives the channel in 4 moment in current period
After matrix, merge channel matrix according to antenna port at the corresponding relation of each moment and antenna element, it is thus achieved that
32 antenna element of this cycle are to the channel matrix of this user terminal, and feed back to base station.
Assume matrix [the H11 H12 H13 H14 that channel matrix is 8 × 1 dimensions of the 1st moment channel feedback
H15 H16 H17 H18]T, the channel matrix of the 2nd moment user terminal feedback is 8 × 1 dimensional matrix [H21
H22 H23 H24 H25 H26 H27 H28]T, the channel matrix of the 3rd moment user terminal feedback is 8 ×
The matrix [H31 H32 H33 H34 H35 H36 H37 H38] of 1 dimensionT, the 4th moment user terminal feedback
Channel matrix is the matrix [H41 H42 H43 H44 H45 H46 H47 H48] of 8 × 1 dimensionsT, by time each
The channel matrix in 4 moment is merged by the corresponding relation carving antenna port and antenna element, it is possible to
Obtain whole 32 antennas channel matrix to user terminal, specific as follows:
From above-mentioned two embodiment, on different antennae a period of time, send CSI-RS pilot tone the most in the same time,
The channel condition information obtaining more antenna port can be combined such that it is able to reach to save pilot-frequency expense
Purpose.In Fig. 1, realized the channel obtaining 16 antenna element to user terminal by 4 ports
Matrix；In body 2, realized the channel matrix obtaining 32 antenna element to user terminal by 4 ports.
The channel matrix that base station obtains comprises large volumes of channels information, such as 16 antenna element for Fig. 1
Fig. 1 can obtain the channel matrix of 4 × 4, the follow-up channel information often gone that can use channel matrix,
The channel information of each column, or the average channel information of row or column, carry out the relevant treatment such as codebook selecting.
In sum, the application is less than the antenna port of antenna element number, and each sky by base station configuration
Line cap is mapped in different antenna element the most in the same time a cycle, uses limited port
Realize the transmission of multiple antenna element, it is possible to obtain the channel condition information of more antennas port, and save
Pilot-frequency expense.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of protection of the invention.
Claims (6)
1. a channel condition information CSI measures feedback method, it is characterised in that the method includes:
Base station sends information, described CSI-RS for M antenna element, configuration CSI-reference signal RS
Transmission information is: N number of antenna port, and described N number of antenna port is at M/N of each cycle
N number of antenna element that moment is corresponding；Wherein, N and M is the integer more than 0, and M/N is integer；
N number of sky that described N number of port is corresponding is passed through, in M/N the moment in each cycle, respectively in this base station
Linear array sends CSI-RS, makes N number of antenna element that user terminal often obtains to the channel of user terminal
During matrix, feed back to base station；
This base station receives N number of antenna element channel matrix to user terminal of described user terminal feedback,
If current the M/N the channel matrix that channel matrix is this cycle obtained, then this cycle is obtained
M/N channel matrix, according to N number of antenna port at M/N moment and N number of antenna array in this cycle
The corresponding relation of son, the channel matrix obtained in this cycle merges, arrives as M antenna element of this cycle
The channel matrix of described user terminal.
Method the most according to claim 1, it is characterised in that described N is M antenna element
Transversely arranged antenna array subnumber, or the antenna array subnumber of longitudinal arrangement.
Method the most according to claim 1, it is characterised in that
When N is the transversely arranged antenna array subnumber of M antenna element, and described N number of antenna element is to using
The channel matrix of family terminal is Q × N-dimensional degree matrix, and described M antenna element is to described user terminal
Channel matrix is (Q × M/N) × N latitude matrix；Wherein, Q is the sky that user terminal receives CSI-RS
Line number, and the integer more than 0；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, described N number of antenna element is to using
The channel matrix of family terminal is N × 1 dimensional matrix, and described M antenna element is to described user terminal
Channel matrix is N × (Q × M/N) latitude matrix.
4. a channel condition information CSI measures feedback method, it is characterised in that the method includes:
User terminal receives CSI-reference signal RS of the described base station configuration that base station sends and sends letter
Breath, obtains described CSI-RS and sends information and store；Described CSI-RS sends information: N number of antenna
Port, and described N number of antenna port is at N number of antenna array corresponding to M/N the moment in each cycle
Son；Wherein, N and M is the integer more than 0, and M/N is integer；
Described user terminal receives the CSI-RS that base station sends, it is thus achieved that N number of antenna element is to this user
The channel matrix of terminal；
If current the M/N the channel matrix that channel matrix is current period obtained, then according to storage
N number of antenna port M/N moment in this cycle and the corresponding relation of N number of antenna element, by this week
The channel matrix that phase obtains merges, as the channel square of M antenna element of this cycle to this user terminal
Battle array, and feed back to base station.
Method the most according to claim 1, it is characterised in that described N is M antenna element
Transversely arranged antenna array subnumber, or the antenna array subnumber of longitudinal arrangement.
Method the most according to claim 1, it is characterised in that
When N is the transversely arranged antenna array subnumber of M antenna element, and described N number of antenna element is to using
The channel matrix of family terminal is Q × N-dimensional degree matrix, and described M antenna element is to described user terminal
Channel matrix is (Q × M/N) × N latitude matrix；Wherein, Q is the sky that user terminal receives CSI-RS
Line number, and the integer more than 0；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, described N number of antenna element is to using
The channel matrix of family terminal is N × 1 dimensional matrix, and described M antenna element is to described user terminal
Channel matrix is N × (Q × M/N) latitude matrix.
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| CN108633063A (en) * | 2017-03-26 | 2018-10-09 | 上海朗帛通信技术有限公司 | A kind of user equipment for multi-antenna transmission, the method and apparatus in base station |
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| WO2019042258A1 (en) * | 2017-08-28 | 2019-03-07 | 华为技术有限公司 | Csi-rs measurement feedback method and device |
| CN111464218A (en) * | 2019-01-18 | 2020-07-28 | 中国移动通信有限公司研究院 | Method and device for managing downlink wave beams |
| CN113676234A (en) * | 2020-05-14 | 2021-11-19 | 上海诺基亚贝尔股份有限公司 | Enhanced CSI feedback in NTN with long propagation delay |
| WO2023011088A1 (en) * | 2021-07-31 | 2023-02-09 | 华为技术有限公司 | Channel state information feedback method and communication apparatus |
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| CN108633063A (en) * | 2017-03-26 | 2018-10-09 | 上海朗帛通信技术有限公司 | A kind of user equipment for multi-antenna transmission, the method and apparatus in base station |
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| CN108633062B (en) * | 2017-03-26 | 2021-10-29 | 上海朗帛通信技术有限公司 | Method and device for multi-antenna transmission in base station and user equipment |
| CN108633063B (en) * | 2017-03-26 | 2021-10-29 | 上海朗帛通信技术有限公司 | Method and device for user equipment and base station for multi-antenna transmission |
| WO2019042258A1 (en) * | 2017-08-28 | 2019-03-07 | 华为技术有限公司 | Csi-rs measurement feedback method and device |
| US11218208B2 (en) | 2017-08-28 | 2022-01-04 | Huawei Technologies Co., Ltd. | CSI-RS measurement feedback method and device |
| CN111464218A (en) * | 2019-01-18 | 2020-07-28 | 中国移动通信有限公司研究院 | Method and device for managing downlink wave beams |
| CN111464218B (en) * | 2019-01-18 | 2022-08-12 | 中国移动通信有限公司研究院 | Method and device for managing downlink wave beams |
| CN113676234A (en) * | 2020-05-14 | 2021-11-19 | 上海诺基亚贝尔股份有限公司 | Enhanced CSI feedback in NTN with long propagation delay |
| WO2023011088A1 (en) * | 2021-07-31 | 2023-02-09 | 华为技术有限公司 | Channel state information feedback method and communication apparatus |
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Effective date of registration: 20220106 Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF INFORMATION AND COMMUNICATIONS Address before: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Patentee before: The Research Institute of Telecommunications Transmission MIIT |