CN106301507B - A kind of channel state information measurement feedback method - Google Patents
A kind of channel state information measurement feedback method Download PDFInfo
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- CN106301507B CN106301507B CN201510251574.0A CN201510251574A CN106301507B CN 106301507 B CN106301507 B CN 106301507B CN 201510251574 A CN201510251574 A CN 201510251574A CN 106301507 B CN106301507 B CN 106301507B
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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]
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Abstract
The present invention provides a kind of channel state informations to measure feedback method.Base station sends CSI-RS by the corresponding N number of antenna element in the N number of port respectively at the M/N moment in each period, makes to feed back to base station when channel matrix of the N number of antenna element of the every acquisition of user terminal to user terminal；N number of antenna element of the user terminal feedback is received to the channel matrix of user terminal, if the channel matrix currently obtained is the M/N channel matrix in the period, the M/N channel matrix that then period is obtained, according to N number of antenna port at the M/N moment in the period and the corresponding relationship of N number of antenna element, the channel matrix that the period is obtained merges, channel matrix as M antenna element of the period to the user terminal, the transmission in mutiple antennas a period of time is realized using limited port, the channel state information of more antennas port can be obtained, and save pilot-frequency expense.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of channel state information measures feedback method.
Background technique
The introducing of active antenna, makes it possible 3D MIMO technology, that is, in addition to level dimension can use multiple antennas
Wave beam forming and spatial reuse are carried out, multiple antennas is also can use in the vertical dimension and carries out the adjustment of dynamic angle of declination, carry out basis
The position of the vertical dimensions of UE adjusts the wave beam forming direction of vertical dimensions.
Using 3D MIMO technology, other than the channel state information reference signals (CSI-RS) of measurement horizontal dimensions, also
It needs to measure the CSI-RS of vertical dimensions.Channel state information is obtained since horizontal dimensions are measurement CSI-RS, instead
It feeds base station, so that the various transmission plans of multiple antennas are completed, and vertical dimensions will can be realized vertical dimensions wave beam forming
Direction adjustment, it is also desirable to measure the CSI-RS of vertical dimensions to obtain the channel state information of vertical dimensions.
System uses the two-dimensional antenna array of big quantity, needs to define the CSI-RS configuration for being greater than 8 antenna ports, with day
Linear array subnumber purpose increases, and CSI-RS sending port number is proportional increased, although it is contemplated that simply expanding to
Greater than the CSI-RS of 8 ports, but problem very big, and that pilot-frequency expense can be brought big can be influenced on standardization.
Summary of the invention
In view of this, the application provides a kind of channel state information measurement feedback method, to solve, pilot-frequency expense is big to be asked
Topic.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of CSI measurement feedback method, this method comprises:
Base station is directed to M antenna element, and configuration CSI-RS sends information, and the CSI-RS sends information are as follows: N number of antenna end
Mouthful and N number of antenna port each period M/N moment corresponding N number of antenna element；Wherein, N and M is greater than 0
Integer, and M/N be integer；
The base station is sent by the corresponding N number of antenna element in the N number of port respectively at the M/N moment in each period
CSI-RS feeds back to base station when making channel matrix of the N number of antenna element of the every acquisition of user terminal to user terminal；
The base station receives N number of antenna element of the user terminal feedback to the channel matrix of user terminal, if currently obtaining
The channel matrix taken is the M/N channel matrix in the period, then the M/N channel matrix obtained the period, according to N number of day
Line end mouth merges in the M/N moment in the period and the corresponding relationship of N number of antenna element, the channel matrix which is obtained,
Channel matrix as M antenna element of the period to the user terminal.
A kind of CSI measurement feedback method, this method comprises:
The CSI-RS that user terminal receives the base station configuration of base station transmission sends information, obtains the CSI-RS hair
It delivers letters and breath and stores；The CSI-RS sends information are as follows: N number of antenna port and N number of antenna port are in each period
M/N moment corresponding N number of antenna element；Wherein, N and M is the integer greater than 0, and M/N is integer；
The user terminal receive base station transmission CSI-RS, obtain N number of antenna element to this user terminal channel
Matrix；
If the channel matrix currently obtained is the M/N channel matrix of current period, according to N number of antenna end of storage
Mouth merges in the M/N moment in the period and the corresponding relationship of N number of antenna element, the channel matrix which is obtained, as
M antenna element of the period and feeds back to base station to the channel matrix of this user terminal.
As can be seen from the above technical solution, base station configures the antenna port for being less than antenna element number in the application, and each
Antenna port was mapped in different antenna element in the different moments of a cycle, realized multiple days using limited port
The transmission of linear array, can obtain the channel state information of more antennas port, and save pilot-frequency expense.
Detailed description of the invention
Fig. 1 is the schematic diagram of the corresponding lateral antenna element in a cycle internal antenna port in the embodiment of the present application；
Fig. 2 is the schematic diagram that a cycle internal antenna port corresponds to Longitudinal Antenna a period of time in the embodiment of the present application；
Fig. 3 is that CSI measures feedback method flow diagram in the embodiment of the present application one；
Fig. 4 is that CSI measures feedback method flow diagram in the embodiment of the present application two.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
A kind of CSI measurement feedback method is provided in the embodiment of the present application, base station configuration is less than the antenna of antenna element number
Port, and each antenna port was mapped in different antenna element in the different moments of a cycle, used limited port
The transmission for realizing mutiple antennas a period of time, can obtain the channel state information of more antennas port, and save pilot-frequency expense.
In the embodiment of the present application, base station is directed to M antenna element, and configuration CSI-RS sends information, and the CSI-RS is sent
Information are as follows: the M/N moment corresponding N number of antenna element of N number of antenna port and N number of antenna port in each period；
Wherein, N and M is the integer greater than 0, and M/N is integer.
When specific implementation, 16 antenna element are such as directed to, 4 antenna ports can be used and realize, such as 4 antenna ports point
It Wei not antenna port 1, antenna port 2, antenna port 3 and antenna port 4；16 antenna element are respectively antenna element 1, antenna
A period of time 2 ... antenna element 16 then needs point 4 (16/4) a moment to send CSI-RS, the day in a cycle in a cycle
The corresponding relationship of linear array and antenna port are as follows: first moment corresponding 4 different antenna element of 4 antenna ports, second
4 antenna ports of a moment correspond to 4 different antenna element in other 12 antenna element, 4 antennas of third moment
Port corresponds to 4 different antenna element in other 8 antenna element, and the 4th moment, 4 antenna element corresponded to remaining 4
4 different antennae a period of time in a antenna element.
As it can be seen that each port corresponds to different antenna element, and corresponding in a cycle at four moment of a cycle
To all antenna element.
The following corresponding relationship of the application offer antenna port and antenna element:
The N is the antenna array subnumber of the transversely arranged antenna array subnumber or longitudinal arrangement of M antenna element, i.e., when per
Corresponding N number of antenna element is carved as lateral antenna array subnumber or Longitudinal Antenna a period of time number.
With reference to the accompanying drawing, the relationship of antenna port and antenna element is described in detail.
It is the signal of the corresponding lateral antenna element in a cycle internal antenna port in the embodiment of the present application referring to Fig. 1, Fig. 1
Figure.Fig. 1 is with 16 antenna element, for configuring 4 antenna ports.Dotted line antenna in Fig. 1 is indicated in corresponding 4 ports of moment
Corresponding 4 antenna element can be sent in a cycle by each antenna element by corresponding relationship shown in FIG. 1
CSI-RS。
Fig. 1 is only a kind of citing, as long as in corresponding 4 lateral antenna element of each moment in the period, such as
Can be with antenna element shown in the 2nd moment corresponding 1st moment corresponding dotted line, corresponding 2nd moment at the 3rd moment is corresponding
Dotted line shown in antenna element, antenna element shown in the 4th moment corresponding 3rd moment corresponding dotted line, the 1st moment
Antenna element shown in corresponding 4th moment corresponding dotted line etc..
Referring to fig. 2, Fig. 2 is the signal that a cycle internal antenna port corresponds to Longitudinal Antenna a period of time in the embodiment of the present application
Figure.With 32 antenna element in Fig. 2, for configuring 8 antenna ports.Dotted line antenna in Fig. 2 is indicated in corresponding 8 ports pair
8 antenna element answered can be sent in a cycle by each antenna element by corresponding relationship shown in Fig. 2
CSI-RS。
Fig. 1 is only a kind of citing, as long as in corresponding 8 longitudinal antenna element of each moment in the period, such as
Can be with antenna element shown in the 2nd moment corresponding 1st moment corresponding dotted line, corresponding 2nd moment at the 3rd moment is corresponding
Dotted line shown in antenna element, antenna element shown in the 4th moment corresponding 3rd moment corresponding dotted line, the 1st moment
Antenna element shown in corresponding 4th moment corresponding dotted line etc..
With reference to the accompanying drawing, it is described in detail how the application realizes CSI-RS measurement feedback.
Embodiment one
It is that CSI measures feedback method flow diagram in the embodiment of the present application one referring to Fig. 3, Fig. 3.Specific steps are as follows:
Step 301, base station passes through the corresponding N number of antenna element in the N number of port at the M/N moment in each period respectively
CSI-RS is sent, when making channel matrix of the N number of antenna element of the every acquisition of user terminal to user terminal, feeds back to base station.
Step 302, which receives N number of antenna element of the user terminal feedback to the channel matrix of user terminal.
Step 303, if the channel matrix currently obtained is the M/N channel matrix in the period, the base station is by the period
M/N channel matrix of acquisition, according to N number of antenna port in the M/N moment pass corresponding with N number of antenna element in the period
System, the channel matrix which is obtained merge, the channel matrix as M antenna element of the period to the user terminal.
When N is the transversely arranged antenna array subnumber of M antenna element, the channel of N number of antenna element to user terminal
Matrix is Q × N-dimensional degree matrix, and the channel matrix of the M antenna element to the user terminal is (Q × M/N) × N latitude square
Battle array；Wherein, Q is the antenna number that user terminal receives CSI-RS, and is the integer greater than 0；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, the channel of N number of antenna element to user terminal
Matrix is the dimensional matrix of N × 1, and the channel matrix of the M antenna element to the user terminal is N × (Q × M/N) latitude square
Battle array.
By taking Fig. 1 as an example, for a cycle, base station is in different moments according to the corresponding relationship of antenna port and antenna element
Send CSI-RS.
User terminal receive base station send CSI-RS, obtain 4 antenna element to this user terminal channel matrix, when
When the user terminal uses 1 receiving antenna, at a moment of a cycle, the channel matrix which obtains is 1
× 4 latitude matrixes, and the channel matrix feedback that each moment is obtained is to base station.
Assuming that the channel matrix of the 1st moment channel feedback is the matrix [H11 H12 H13 H14] of 1 × 4 dimension, the 2nd moment
The channel matrix of user terminal feedback is 1 × 4 dimensional matrix [H21 H22 H23 H24], the letter of the 3rd moment user terminal feedback
Road matrix is the matrix [H31 H32 H33 H34] of 1 × 4 dimension, and the channel matrix of the 4th moment user terminal feedback is 1 × 4 dimension
Matrix [H41 H42 H43 H44], by each moment antenna port and the corresponding relationship of antenna element by the channel square at 4 moment
Battle array merge, so that it may obtain entire 16 antennas to user terminal channel matrix, it is specific as follows:
Embodiment two
Referring to fig. 4, Fig. 4 is that CSI measures feedback method flow diagram in the embodiment of the present application two.Specific steps are as follows:
Step 401, the CSI-RS that user terminal receives the base station configuration of base station transmission sends information, described in acquisition
CSI-RS sends information and stores.
Base station notifies the CSI-RS received to user terminal, user terminal storage after configuration CSI-RS sends information
Send information, the channel matrix for merging M antenna element to this user terminal.
Step 402, which receives the CSI-RS of base station transmission, obtains N number of antenna element to this user terminal
Channel matrix.
Step 403, if the channel matrix currently obtained is the M/N channel matrix of current period, the user terminal root
According to N number of antenna port of storage at the M/N moment in the period and the corresponding relationship of N number of antenna element, which is obtained
Channel matrix merges, and as the channel matrix of M antenna element of the period to this user terminal, and feeds back to base station.
When N is the transversely arranged antenna array subnumber of M antenna element, the channel of N number of antenna element to user terminal
Matrix is Q × N-dimensional degree matrix, and the channel matrix of the M antenna element to the user terminal is (Q × M/N) × N latitude square
Battle array；Wherein, Q is the antenna number that user terminal receives CSI-RS；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, the channel of N number of antenna element to user terminal
Matrix is the dimensional matrix of N × 1, and the channel matrix of the M antenna element to the user terminal is N × (Q × M/N) latitude square
Battle array.
By taking Fig. 2 as an example, for a cycle, base station is in different moments according to the corresponding relationship of antenna port and antenna element
Send CSI-RS.
User terminal receive base station send CSI-RS, obtain 8 antenna element to this user terminal channel matrix, when
When the user terminal uses 1 receiving antenna, at a moment of a cycle, the channel matrix which obtains is 8
× 1 latitude matrix receives in current period after the channel matrix at 4 moment, according to antenna port in each moment and antenna array
The corresponding relationship of son merges channel matrix, obtains 32 antenna element of the period to the channel matrix of this user terminal, and feeds back
To base station.
Assuming that the channel matrix of the 1st moment channel feedback is matrix [the H11 H12 H13 H14 H15 H16 of 8 × 1 dimensions
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 matrix [the H31 H32 H33 H34 H35 H36 of 8 × 1 dimensions
H37 H38]T, the channel matrix of the 4th moment user terminal feedback is matrix [the H41 H42 H43 H44 H45 H46 of 8 × 1 dimensions
H47 H48]T, the channel matrix at 4 moment is merged by the corresponding relationship of each moment antenna port and antenna element,
Can be obtained by entire 32 antennas to user terminal channel matrix, it is specific as follows:
By above-mentioned two embodiment as it can be seen that different moments send CSI-RS pilot tone on different antennae a period of time, can combine
The channel state information of more antenna ports is obtained, so as to achieve the purpose that save pilot-frequency expense.As shown in figure 1, pass through 4
Realize the channel matrix for obtaining 16 antenna element to user terminal in a port；In body 2, is realized by 4 ports and obtain 32
Channel matrix of the antenna element to user terminal.
It include large volumes of channels information in the channel matrix that base station obtains, as available in 16 antenna element Fig. 1 of Fig. 1
4 × 4 channel matrix, the channel information of subsequent every row that channel matrix can be used, the channel information or row or column of each column
Average channel information, carry out the relevant treatments such as code book selection.
In conclusion the application is less than the antenna port of antenna element number by base station configuration, and each antenna port exists
The different moments of a cycle are mapped in different antenna element, and the hair in mutiple antennas a period of time is realized using limited port
It send, the channel state information of more antennas port can be obtained, and save pilot-frequency expense.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (6)
1. a kind of channel state information CSI measures feedback method, which is characterized in that this method comprises:
Base station is directed to M antenna element, and configuration CSI- reference signal RS sends information, and the CSI-RS sends information are as follows: N number of day
The M/N moment corresponding N number of antenna element of line end mouth and N number of antenna port in each period；Wherein, N and M are
Integer greater than 0, and M/N is integer；
The base station sends CSI- by the corresponding N number of antenna element in the N number of port respectively at the M/N moment in each period
RS feeds back to base station when making the every channel matrix for obtaining N number of antenna element to user terminal of user terminal；
The base station receives N number of antenna element of the user terminal feedback to the channel matrix of user terminal, if currently obtain
Channel matrix is the M/N channel matrix in the period, then the M/N channel matrix obtained the period, according to N number of antenna end
Mouth merges in the M/N moment in the period and the corresponding relationship of N number of antenna element, the channel matrix which is obtained, as
Channel matrix of the M antenna element of the period to the user terminal.
2. the method according to claim 1, wherein the N is the transversely arranged antenna element of M antenna element
Several or longitudinal arrangement antenna array subnumber.
3. the method according to claim 1, wherein
When N is the transversely arranged antenna array subnumber of M antenna element, the channel matrix of N number of antenna element to user terminal
For Q × N-dimensional degree matrix, the channel matrix of the M antenna element to the user terminal is (Q × M/N) × N latitude matrix；
Wherein, Q is the antenna number that user terminal receives CSI-RS, and is greater than 0 integer；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, the channel matrix of N number of antenna element to user terminal
For the dimensional matrix of N × 1, the channel matrix of the M antenna element to the user terminal is N × (Q × M/N) latitude matrix.
4. a kind of channel state information CSI measures feedback method, which is characterized in that this method comprises:
The CSI- reference signal RS that user terminal receives the base station configuration of base station transmission sends information, obtains the CSI-
RS sends information and stores；The CSI-RS sends information are as follows: N number of antenna port and N number of antenna port are in each week
The M/N moment of phase corresponding N number of antenna element；Wherein, N and M is the integer greater than 0, and M/N is integer；
The user terminal receive base station transmission CSI-RS, obtain N number of antenna element to this user terminal channel matrix；
If the channel matrix currently obtained is the M/N channel matrix of current period, existed according to N number of antenna port of storage
The M/N moment in the period and the corresponding relationship of N number of antenna element, the channel matrix which is obtained merges, as this week
M antenna element of phase and feeds back to base station to the channel matrix of this user terminal.
5. according to the method described in claim 4, it is characterized in that, the N is the transversely arranged antenna element of M antenna element
Several or longitudinal arrangement antenna array subnumber.
6. according to the method described in claim 5, it is characterized in that,
When N is the transversely arranged antenna array subnumber of M antenna element, the channel matrix of N number of antenna element to user terminal
For Q × N-dimensional degree matrix, the channel matrix of the M antenna element to the user terminal is (Q × M/N) × N latitude matrix；
Wherein, Q is the antenna number that user terminal receives CSI-RS, and is greater than 0 integer；
When the antenna array subnumber that N is M antenna element longitudinal arrangement, the channel matrix of N number of antenna element to user terminal
For the dimensional matrix of N × 1, the channel matrix of the M antenna element to the user terminal is N × (Q × M/N) latitude matrix.
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| 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 |
| 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 |
| CN109428637B (en) * | 2017-08-28 | 2022-02-01 | 华为技术有限公司 | CSI-RS measurement feedback method and equipment |
| 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 |
| WO2021226928A1 (en) * | 2020-05-14 | 2021-11-18 | Nokia Shanghai Bell Co., Ltd. | Enhanced csi feedback in ntn with long propagation delay |
| CN115694758A (en) * | 2021-07-31 | 2023-02-03 | 华为技术有限公司 | Channel state information feedback method and communication device |
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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 |