CN107294880A - Method and apparatus for determining channel information - Google Patents
Method and apparatus for determining channel information Download PDFInfo
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- CN107294880A CN107294880A CN201610196814.6A CN201610196814A CN107294880A CN 107294880 A CN107294880 A CN 107294880A CN 201610196814 A CN201610196814 A CN 201610196814A CN 107294880 A CN107294880 A CN 107294880A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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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
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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
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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
- 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
- H04B7/0658—Feedback reduction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
Abstract
The method and apparatus that embodiment of the disclosure relates to determining the channel information of channel.This method includes receiving the channel condition information reference symbol (CSI RS) from base station, and the CSI RS are sent by base station using the CSI RS resources for the part transmission antenna port being mapped in aerial array.This method also includes the partial channel knowledge that the channel corresponding to part transmit antenna port is determined by measuring CSI RS.In addition, this method also includes being based on partial channel knowledge, the overall channel information of channel is determined.
Description
Technical field
Embodiment of the disclosure is related to wireless communication field, and more particularly, to the side for determining channel information
Method and equipment.
Background technology
Two-dimentional (2D) multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) transmission is ground
Study carefully and be applied in Long Term Evolution (Long Term Evolution, LTE) system, wherein conventional antenna array is by flatly
Arrange to form wave beam in horizontal dimensions.In addition, current also proposed three-dimensional (3D) mimo channel mode.In order to from 3D
Wireless channel obtains more potential gains, and 2D active antenna array systems have been used for the shape in vertical dimensions and horizontal dimensions
Into 3D wave beams.
However, in traditional scheme, channel condition information reference symbol (CSI-RS) resource is limited to perform for sending
The full port mapping of antenna.Full port mapping means that the number of CSI-RS is equal to the number of transmission antenna port.In order to
The complete channel information of radio communication channel is obtained, it is necessary to utilize each CSI-RS for being mapped to each transmission antenna port
To send corresponding CSI-RS.Therefore, full port mapping enables user equipment more easily to determine radio communication channel
Channel information, but thus bring larger CSI-RS transmission expense.In addition, with the increase of transmission antenna port number
(for example, increasing to the 32 transmission antenna ends reached desired by 3D MIMO transmissions from current most 16 transmission antenna ports
Mouthful), CSI-RS transmission expense will be bigger.Traditional scheme can not be effectively reduced CSI-RS transport overhead.
The content of the invention
Embodiment of the disclosure provides a kind of method and apparatus for being used to determine the channel information of channel.
According to the first aspect of the disclosure, there is provided a kind of method for being used to determine the channel information of channel.This method bag
Including channel condition information reference symbol CSI-RS, CSI-RS of the reception from base station, utilization is mapped in aerial array by the base station
Part transmission antenna port CSI-RS and send.This method also includes determining to correspond to portion by measuring CSI-RS
Divide the partial channel knowledge of the channel of transmit antenna port.In addition, this method also includes being based on partial channel knowledge, channel is determined
Overall channel information.
According to the second aspect of the disclosure, there is provided a kind of equipment for being used to determine the channel information of channel.The equipment bag
Include reference symbol receiving module, be configured as receive channel condition information reference symbol CSI-RS, CSI-RS from base station by
The base station is sent using the CSI-RS for the part transmission antenna port being mapped in aerial array.The equipment also includes portion
Point channel information determining module, is configured as determining the channel corresponding to part transmit antenna port by measuring CSI-RS
Partial channel knowledge.In addition, the equipment also include overall channel information determining module, be configured as based on partial channel knowledge come
Determine the overall channel information of channel.
Embodiment of the disclosure can realize the estimation to channel information based on the method for section ports mapping, so as to
Enough it is effectively reduced CSI-RS transmission expense in the process.
It is to introduce the selection to concept for simplified form to provide Summary, their specific realities below
Applying in mode to be further described.Summary is not intended to identify the key feature or principal character of the disclosure, is also not intended to
Limit the scope of the present disclosure.
Brief description of the drawings
By the way that disclosure exemplary embodiment is described in more detail with reference to accompanying drawing, the disclosure it is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein, in disclosure exemplary embodiment, identical reference number is usual
Represent same parts.
Fig. 1 is shown in which that the schematic diagram of the environment 100 of embodiment of the disclosure can be implemented；
Fig. 2 shows the illustrative diagram for the aerial array 200 that base station 110 as shown in Figure 1 has；
Fig. 3 shows the flow chart for being used to determine the method 300 of the channel information of channel in accordance with an embodiment of the present disclosure；
Fig. 4 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Fig. 5 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Fig. 6 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Fig. 7 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Fig. 8 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Fig. 9 show in accordance with an embodiment of the present disclosure the overall channel information of channel is determined based on partial channel knowledge
Schematic diagram；
Figure 10 show in accordance with an embodiment of the present disclosure based on partial channel knowledge come determine channel overall channel believe
The schematic diagram of breath；And
Figure 11 shows the block diagram for being used to determine the equipment 1100 of the channel information of channel in accordance with an embodiment of the present disclosure.
Specific embodiment
Preferred embodiment of the present disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without that should be limited by embodiments set forth here
System.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be complete by the scope of the present disclosure
Ground conveys to those skilled in the art.
Terminology used in this article " comprising " and its deformation represent that opening includes, i.e., " include but is not limited to ".Unless
Especially statement, term "or" represents "and/or".Term "based" is represented " being based at least partially on ".Term " implemented by an example
Example " and " one embodiment " expression " at least one example embodiment "." at least one is other for term " another embodiment " expression
Embodiment ".Term " first ", " second " etc. may refer to different or identical object.Hereafter it is also possible that other are bright
True and implicit definition.
In embodiment of the disclosure, term " CSI-RS " represents the time domain and/or frequency domain for sending CSI-RS
Resource.Term " CSI-RS configures resource " represents the set of multiple CSI-RSs.Term " CSI processes " is represented by base station 110
The process for being used to obtain channel condition information (CSI) of triggering.CSI processes can also be periodic and different CSI mistakes
Journey can be provided having different transmission cycles.
In traditional scheme, in order to which the antenna port to fewer number of (for example, 1,2,4 or 8) is extended to support
The antenna port of greater number (for example, 12,16), it usually needs carry out CSI-RS polymerization.CSI-RS polymerization meaning
Corresponding to some CSI-RSs of less antenna port polymerizeing to form the new CSI- corresponded to compared with multi-antenna port
RS resources.This method is referred to as the method based on full port mapping, it means that CSI-RS and transmission antenna port it
Between be the relation mapped one by one.
However, in current LTE standard (for example, version 13), the total number of available CSI-RS element is 40.
These CSI-RS elements will be used for both channel information estimation and interferometry.Reached desired by 3D MIMO transmissions
Transmission antenna port number is 32.If this means realize that channel information is estimated using the method based on full port mapping
Meter, then without enough CSI-RS elements for interferometry.That is, what the method based on full port mapping was brought
Higher CSI-RS transmission expense causes to be difficult to while performing both channel information estimation and interferometry.
In order to solve the above problems and other potential problems in one or more, in accordance with an embodiment of the present disclosure,
Propose a kind of scheme for being used to determine channel information.The program is realized to channel information based on the method that section ports map
Estimation, so as to be effectively reduced CSI-RS transmission expense in the process.
Fig. 1 is shown in which that the schematic diagram of the environment 100 of embodiment of the disclosure can be implemented.As shown in figure 1, environment
100 include base station 110 and UE 120, and both are communicated via radio communication channel.Base station 110 can for example include LTE systems
The node B (eNB) of evolution in system.In the context of the disclosure, base station " (BS) can represent node B (NodeB or
NB), enode b (eNodeB or eNB), remote radio unit (RRU), radio-frequency maser (RH), far end radio frequency head (RRH),
Repeater, low power nodes, femto base station, femto base station etc.." user equipment " (UE) refers to communicate with BS
Any equipment.As an example, UE can include terminal, mobile terminal (MT), subscriber stations (SS), portable subscriber platform (PSS), shifting
Dynamic platform (MS) or access terminal (AT)..
In order to obtain the channel condition information (CSI) of radio communication channel, base station 110 can send CSI- to UE 120
RS.UE 120 can receive the CSI-RS from base station 110, and determine that the channel of the channel is believed by measuring CSI-RS
Breath.The channel information can describe decay factor of the signal on every transmission paths of the channel.Based on the channel information, UE
120 can use corresponding code book to obtain the CSI of the channel, and feed back the CSI to base station 110.The CSI can be base station
Radio communication between 110 and UE 120 provides guaranteed reliability.Herein, above-mentioned process is referred to as " CSI processes ".
Base station 110 generally has multiple transmission antennas, and these antenna can constitute a 2D active antenna array.Base station
110 can send CSI-RS using the CSI-RS for the antenna port being mapped in the aerial array to UE 120.Each
Transmission antenna port corresponds to a transmission paths of signal.Therefore, (that is, every biography is obtained to rebuild overall wireless channel
Decay factor on defeated path), UE 120 is it needs to be determined that corresponding to the overall channel information of all transmission antenna ports.
Fig. 2 shows the illustrative diagram for the aerial array 200 that base station 110 as shown in Figure 1 has.Such as Fig. 2 institutes
Show, for example, the aerial array is made up of M × N number of transmission antenna of dual polarization (i.e. vertical polarization and horizontal polarization), therefore the day
Linear array has altogether 2MN transmission antenna port.If to it is in these transmission antenna ports, with two kinds of polarization modes
The transmission antenna port of polarization mode a kind of numbered by column, and then to it is in these transmission antenna ports, have
The transmission antenna port of another polarization mode in two kinds of polarization modes is numbered by column, then is determined required for UE 120
, can be represented as corresponding to the overall channel informations of all transmission antenna ports：H=[h1,h2,…,h2MN].Wherein H tables
Show the overall channel information of channel, and hn(n=1,2 ... ... 2MN) represent to correspond to the channel of n-th of transmission antenna port
Information.
Fig. 3 shows the flow chart for being used to determine the method 300 of the channel information of channel in accordance with an embodiment of the present disclosure.
Method 300 is described into for Primary Reference environment 100 as shown in Figure 1 and aerial array 200 as shown in Figure 2 below.For example,
Method 300 can be performed by UE 120 as shown in Figure 1.It should be appreciated that method 300 can also include it is unshowned attached
Plus step and/or shown step can be omitted.The scope of the present disclosure is not limited in this respect.
Method 300 starts from step 310.In the step 310, the CSI-RS from base station 110 is received by UE 120, should
CSI-RS is sent by base station 110 using the CSI-RS for the part transmission antenna port being mapped in aerial array 200.
Next, method 300 proceeds to step 320.In step 320, UE 120 is determined pair by measuring CSI-RS
Should be in the partial channel knowledge of the channel of part transmit antenna port.For example, partial channel knowledge can be expressed as
In a step 330, UE 120 is based on partial channel knowledge, determines the overall channel information of channel.For example, at one
In embodiment, the overall channel information H of channel can be calculated using formula below (1)：
Wherein, ζ () represents that partial channel knowledge rebuilds function, and it can be linear synthesis computing, product calculation (example
Such as, Kronecker product) etc..
Only merely for explanation and demonstration purpose, method is described in further detail below with reference to some specific embodiments
300.In one embodiment, the CSI-RS from base station 110 can be received by UE 120, the CSI-RS can be by base station
110 (310) sent using the first CSI-RS and the second CSI-RS.First CSI-RS can be mapped to day
A row transmission antenna port in linear array 200, and the second CSI-RS can be mapped to one in aerial array 200
Row transmission antenna port.Therefore, UE 120 can be determined by measuring CSI-RS corresponding to the row transmission antenna port
Part I channel informationAnd corresponding to the Part II channel information of a line transmission antenna port(320)。
Next, UE 120 can be by calculating Part I channel informationWith Part II channel informationMultiply
(for example, Kronecker product) is accumulated to determine overall channel information H (330).For example, Fig. 4 is shown in accordance with an embodiment of the present disclosure
Based on partial channel knowledge come the schematic diagram of the overall channel information that determines channel.As shown in figure 4,AndOverall channel information H can be with
Calculated according to formula below (2)：
In this embodiment, if the first CSI-RS and the second CSI-RS are included in same CSI-RS configurations
In resource, then the CSI-RS sent using the first CSI-RS and the second CSI-RS total number (is less than for M+2N-1
The total number 2MN of antenna port).Match somebody with somebody if the first CSI-RS and the second CSI-RS are included in different CSI-RS
Put in resource, then the CSI-RS sent using the first CSI-RS and the second CSI-RS total number is (also small for M+2N
In the total number 2MN of antenna port).
In another embodiment, the CSI-RS from base station 110 can be received by UE 120, the CSI-RS can be by
(310) that base station 110 is sent using the 3rd CSI-RS, the 4th CSI-RS and the 5th CSI-RS.3rd CSI-
RS resources can be mapped to a line transmission antenna port in aerial array 200, and the 4th CSI-RS can be mapped to
First group of transmission antenna port in one row transmission antenna port, with a kind of polarization mode in two kinds of polarization modes, the
Five CSI-RSs can be mapped to it is in a row transmission antenna port, with another polarization side in two kinds of polarization modes
Second group of transmission antenna port of formula.Thus, UE 120 can determine the Part III corresponding to a line transmission antenna port
Channel informationCorresponding to the Part IV channel information of first group of transmission antenna portAnd corresponding to second group of transmission
The Part V channel information of antenna port(320)。
Then, UE 120 can be based on Part III channel informationPart IV channel informationWith Part V letter
Road informationOverall channel information H (330) is determined by calculating product.For example, in some embodiments it is possible to using gram
Kronecker product.Certainly, this is only example, and any other is currently known or the product calculation of research can be with this in the future
Disclosed embodiment is used in combination.
For example, Fig. 5 show in accordance with an embodiment of the present disclosure the overall letter of channel is determined based on partial channel knowledge
The schematic diagram of road information.As shown in figure 5,
AndZ overall channel informations H can be counted according to formula below (3)
Calculate：
In this embodiment, if the 3rd CSI-RS, the 4th CSI-RS and the 5th CSI-RS are included
In same CSI-RS configuration resources, then the 3rd CSI-RS, the 4th CSI-RS and the 5th CSI-RS hair are utilized
The CSI-RS sent total number is 2M+N-1 (the total number 2MN for being less than antenna port).If the 3rd CSI-RS, the 4th
CSI-RS and the 5th CSI-RS are included in different CSI-RS configuration resources, then are provided using the 3rd CSI-RS
The total number for the CSI-RS that source, the 4th CSI-RS and the 5th CSI-RS are sent is 2M+N (again smaller than antenna port
Total number 2MN).
Alternatively or additionally, In yet another embodiment, the CSI-RS from base station 110 can be received by UE 120,
The CSI-RS can using the 6th CSI-RS for being mapped to the 3rd group of transmission antenna port and be mapped to the by base station 110
(310) that 7th CSI-RS of four groups of transmission antenna ports is sent.3rd group of transmission antenna port distribution is in aerial array
In 200 first antenna block, and the 4th group of transmission antenna port distribution is in the second antenna block of aerial array 200, wherein
First antenna block is more than the second antenna block.Therefore, UE 120 can determine to correspond to the Part VI letter of the 3rd group of antenna port
Road informationAnd corresponding to the Part VII channel information of the 4th group of transmission antenna port(320)。
Next, UE 120 can be by calculating Part VI channel informationWith Part VII channel informationMultiply
(for example, Kronecker product) is accumulated to determine overall channel information H (330).For example, Fig. 6 is shown in accordance with an embodiment of the present disclosure
Based on partial channel knowledge come the schematic diagram of the overall channel information that determines channel.As shown in fig. 6, overall channel information H can
To be calculated according to formula below (4)：
In this embodiment, if the 6th CSI-RS and the 7th CSI-RS are included in same CSI-RS configurations
In resource, then the CSI-RS sent using the 6th CSI-RS and the 7th CSI-RS total number is 2M ' N '+MN/M '
N ' -1 (the total number 2MN for being less than antenna port), wherein M ' indicate the number for the antenna block being divided in each column, and N ' is indicated
The number for the antenna block being divided in each row, and M ' and N ' be all higher than be equal to 1.If the 6th CSI-RS and the 7th
CSI-RS is included in different CSI-RS configuration resources, then utilizes the 6th CSI-RS and the 7th CSI-RS
The CSI-RS of transmission total number is 2M ' N '+MN/M ' N ' (again smaller than the total number 2MN of antenna port).
In another embodiment, the CSI-RS from base station 110 can be received by UE 120, the CSI-RS can be by
(310) that base station 110 is sent using the multigroup CSI-RS for being respectively mapped to multigroup transmission antenna port.Multigroup transmission day
Every group of transmission antenna port in line end mouthful can include a row transmission antenna port, a line transmission antenna port, transmission antenna
The block of port or the transmission antenna port of intertexture.Therefore, UE 120 can determine to correspond respectively to multigroup transmission antenna port
Some channel informations……(320).Next, UE 120 can be by some channels
Information... application linearly synthesizes to determine to determine overall channel information H (330).For example, overall channel
Information H can be calculated according to formula below (5)：
WhereinWith with H identical dimensions, andIn only with transmission antenna port subset (that is, it is multigroup send
One group of transmission antenna port in antenna port) corresponding element has and measures identified channel information by CSI-RS
Value is (for example, hCSI-RS), the value of remaining element is 0.That is,Formula below (6) can be represented as：
As an example, Fig. 7 to 10 respectively illustrates determining based on partial channel knowledge in accordance with an embodiment of the present disclosure
The schematic diagram of the overall channel information of channel.In the figure 7, every group of transmission antenna port in multigroup transmission antenna port is a line
Transmission antenna port.In fig. 8, every group of transmission antenna port in multigroup transmission antenna port is a row transmission antenna port.
In fig .9, every group of transmission antenna port in multigroup transmission antenna port is the block of transmission antenna port.In Fig. 10, it is multigroup
Every group of transmission antenna port in transmission antenna port is the transmission antenna port interweaved.
In addition, linearly synthesize to determine the embodiment of overall channel information for above-mentioned application, it is under certain conditions, overall
Channel information can also be determined in base station side.Pre-coding matrix instruction (PMI) should feed back to base from UE between additional subset
Stand to indicate the correlation between each subset.In UE sides, PMI_k, which can indicate to utilize, comes from transmission antenna port subset k
The PMI that is selected from code book of partial channel knowledge, code word can useTo represent；PMI_inter can indicate transmission antenna
Channel information between port subset, it can come from first or other transmission antenna ports of each subset, and code word can be usedTherefore, in base station side, overall channel information H can be represented as formula below (7)：
Wherein, index (m, n) represents the antenna port index in aerial array, and indexes (i, j) instruction in antenna end
The respective channels measurement result that openning is concentrated.Indicate code wordI-th of element.
In certain embodiments, method 300 can also include optional additional step.For example, in some implementations, holding
After row step 330, UE 120 can also determine first CSI corresponding with partial channel knowledge, and to the feedback of base station 110 the
One CSI.First CSI can for example include PMI etc..Should support section transmission antenna port for the PMI code books fed back
Number.Corresponding narrow band channel quality indicates that (CQI) and order instruction (RI) feedback can be according to the portions determined during each CSI
Channel information is divided to be calculated and be fed back to base station 110.
Additionally or alternatively, UE 120 can also determine twoth CSI corresponding with overall channel information, and to base
Stand 110 the 2nd CSI of feedback.2nd CSI can for example include PMI, CQI and RI etc..It should be supported for the PMI code books fed back
The number of whole transmission antenna ports.Because different CSI processes can be provided having the different cycles, when UE 120 is set
Be set to feedback two CSI corresponding with overall channel information when, feedback velocity can with more short-period CSI-RS transmission
It is identical, and the channel information from the CSI-RS transmission with longer cycle will be reused until channel information is updated.
In certain embodiments, CSI feedback can be configured to the CSI mistakes based on full port mapping with longer cycle
Journey and the mixing with more short-period CSI processes mapped based on section ports.It is reconstructed in Global Information in the sides of UE 120
In the case of application, UE 120 feeds back CSI based on the channel information rebuild, channel information rebuild can be represented as
Under formula (8)：
Wherein H (t) represents the overall channel information in time slot (frame) t, and function δ { } is represented according in time slot t1And t2Place
One or more groups of antenna ports partial channel knowledge.The formula (9) that one example can be expressed as followsin, wherein D { }
Represent vector diagonalization computing：
By taking the antenna configuration shown in Fig. 7 as an example, the CSI processes based on full port mapping with longer cycle can be with
It is related to antenna port subset #1-#4.CSI feedback can be believed using corresponding code book or other CSI designators based on overall channel
Cease to perform.It is (or any that antenna port subset #1 can be only related to more short-period CSI processes based on full port mapping
Other antenna port subsets).CSI feedback can be based on using corresponding code book or other CSI designators partial channel knowledge come
Perform.
In certain embodiments, for example in UE based on independent partial channel knowledge come in the case of feeding back CSI, PMI is anti-
Feedback should be applied to each CSI processes using the code book for supporting respective antenna port number, in the case, H (t1) and H
(t2) formula below (10) and (11) can be denoted respectively as
H(t1)=W1(t1)W2(t2) (10)
H(t2)=W1(t1)δ{W2(t1),W′(t2)} (11)
Wherein function δ { } represents the code word method of adjustment according to W ', and W ' expressions are anti-according to Short Term Component channel information
Feedback.W1W2Structure can be existing pair of PMI feedback code book result, and if list PMI is set, then：
H(t1)=W (t1) (12)
H(t2)=δ { W (t1),W′(t2)} (13)
Still by taking the antenna configuration shown in Fig. 7 as an example, the CSI processes based on full port mapping with longer cycle
Antenna port subset #1-#4 can be related to.CSI feedback can be based on overall letter using corresponding code book or other CSI designators
Road information is performed.A pair of dual polarized antenna ends can be only related to more short-period CSI processes based on full port mapping
Mouth (same position, different polarization modes).Short-term CSI feedback can utilize the channel variation reflected between the Research of Antenna Polarization
Corresponding code book or other CSI designators are performed.Then, base station will adjust W or W according to the feedback W '2。
In the above-described embodiments, additionally or alternatively, the CSI processes based on full port mapping can be indefinite by base station
Trigger to phase, and can be periodicity CSI processes with CSI-RS measurements that are more short-period, being mapped based on section ports,
Or can also aperiodically be triggered by base station.Such configuration can be semi-statically configured via high-level signaling or
Can be entrained by touching originator (for example, base station).
It should be appreciated that for above in association with each embodiment described by Fig. 1-10, in order to be performed during single CSI
Base station and the operation of UE sides, can also define new CSI feedback pattern.It can be seen that from each embodiment described above
The scheme of the disclosure can realize the estimation to channel information based on the method for section ports mapping, so as to effectively drop
Low CSI-RS transmission expense in the process.
Figure 11 shows the block diagram for being used to determine the equipment 1100 of the channel information of channel in accordance with an embodiment of the present disclosure.
As shown in figure 11, equipment 1100 can include reference symbol receiving module 1110, be configured as receiving the CSI- from base station 110
RS, the CSI-RS are sent out by base station 110 using the CSI-RS for the part transmission antenna port being mapped in aerial array 200
Send.Equipment 1100 can also include partial channel knowledge determining module 1120, be configured as determining by measuring CSI-RS pair
Should be in the partial channel knowledge of the channel of part transmit antenna port.In addition, equipment 1100 can also include overall channel information
Determining module 1130, is configured as determining the overall channel information of channel based on partial channel knowledge.
For purposes of clarity, some optional modules of equipment 1100 are not shown in fig. 11.It will be appreciated, however, that
Equipment 1100 is equally applicable to above with reference to each feature described by Fig. 1-10.Moreover, each of equipment 1100 can be hard
Part module or software module.For example, in certain embodiments, equipment 1100 can be with some or all of utilization software
And/or firmware is realized, for example, it is implemented as comprising computer program product on a computer-readable medium.It is alternatively or attached
Plus ground, equipment 1100 can be realized with some or all of based on hardware, for example, be implemented as integrated circuit (IC), special integrated
Circuit (ASIC), on-chip system (SOC), field programmable gate array (FPGA) etc..The scope of the present disclosure is unrestricted in this regard
System.
Especially, these devices shown in Fig. 4 can partially or entirely be embodied as hardware module, software module,
Firmware module or its any combination.Especially, in certain embodiments, above-described flow, method or process can be by
Hardware in UE or base station is realized.For example, UE can utilize its transmitter, receiver, transceiver and/or processor or control
Device processed carrys out implementation method 300.
The disclosure can be system, method and/or computer program product.Computer program product can include computer
Readable storage medium storing program for executing, containing the computer-readable program instructions for performing various aspects of the disclosure.
Computer-readable recording medium can keep and store to perform the tangible of the instruction that equipment is used by instruction
Equipment.Computer-readable recording medium for example can be-- but be not limited to-- storage device electric, magnetic storage apparatus, optical storage
Equipment, electromagnetism storage device, semiconductor memory apparatus or above-mentioned any appropriate combination.Computer-readable recording medium
More specifically example (non exhaustive list) includes：Portable computer diskette, hard disk, random access memory (RAM), read-only deposit
It is reservoir (ROM), erasable programmable read only memory (EPROM or flash memory), static RAM (SRAM), portable
Compact disk read-only storage (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical coding equipment, for example thereon
Be stored with instruction punch card or groove internal projection structure and above-mentioned any appropriate combination.It is used herein above to calculate
Machine readable storage medium storing program for executing is not construed as instantaneous signal in itself, the electromagnetic wave of such as radio wave or other Free propagations, logical
Cross the electromagnetic wave (for example, the light pulse for passing through fiber optic cables) of waveguide or the propagation of other transmission mediums or transmitted by electric wire
Electric signal.
Computer-readable program instructions as described herein can be downloaded to from computer-readable recording medium each calculate/
Processing equipment, or outer computer is downloaded to or outer by network, such as internet, LAN, wide area network and/or wireless network
Portion's storage device.Network can be transmitted, be wirelessly transferred including copper transmission cable, optical fiber, router, fire wall, interchanger, gateway
Computer and/or Edge Server.Adapter or network interface in each calculating/processing equipment are received from network to be counted
Calculation machine readable program instructions, and the computer-readable program instructions are forwarded, for the meter being stored in each calculating/processing equipment
In calculation machine readable storage medium storing program for executing.
For perform the disclosure operation computer program instructions can be assembly instruction, instruction set architecture (ISA) instruction,
Machine instruction, machine-dependent instructions, microcode, firmware instructions, condition setup data or with one or more programming languages
Source code or object code that any combination is write, programming language of the programming language including object-oriented-such as
Smalltalk, C++ etc., and conventional procedural programming languages-such as " C " language or similar programming language.Computer
Readable program instructions can perform fully on the user computer, partly perform on the user computer, as one solely
Vertical software kit is performed, part is performed or completely in remote computer on the remote computer on the user computer for part
Or performed on server.In the situation of remote computer is related to, remote computer can be by network-bag of any kind
LAN (LAN) or wide area network (WAN)-be connected to subscriber computer are included, or, it may be connected to outer computer is (such as sharp
With ISP come by Internet connection).In certain embodiments, by using computer-readable program instructions
Status information carry out personalized customization electronic circuit, such as PLD, field programmable gate array (FPGA) or can
Programmed logic array (PLA) (PLA), the electronic circuit can perform computer-readable program instructions, so as to realize each side of the disclosure
Face.
Referring herein to the method according to the embodiment of the present disclosure, device (system) and computer program product flow chart and/
Or block diagram describes various aspects of the disclosure.It should be appreciated that each square frame and flow chart of flow chart and/or block diagram and/
Or in block diagram each square frame combination, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to all-purpose computer, special-purpose computer or other programmable datas
The processing unit of processing unit, so as to produce a kind of machine so that these instructions are passing through computer or other programmable numbers
When being performed according to the processing unit of processing unit, generate in one or more of implementation process figure and/or block diagram square frame and provide
Function/action device.Can also be the storage of these computer-readable program instructions in a computer-readable storage medium, this
A little instructions cause computer, programmable data processing unit and/or other equipment to work in a specific way, so that, be stored with finger
The computer-readable medium of order then includes a manufacture, and it includes one or more of implementation process figure and/or block diagram side
The instruction of the various aspects of function/action specified in frame.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment so that perform series of operation steps on computer, other programmable data processing units or miscellaneous equipment, to produce
Raw computer implemented process, so that performed on computer, other programmable data processing units or miscellaneous equipment
Instruct function/action specified in one or more of implementation process figure and/or block diagram square frame.
Flow chart and block diagram in accompanying drawing show the system, method and computer journey of multiple embodiments according to the disclosure
Architectural framework in the cards, function and the operation of sequence product.At this point, each square frame in flow chart or block diagram can generation
One module of table, program segment or a part for instruction, the module, program segment or a part for instruction are used comprising one or more
In the executable instruction for realizing defined logic function.In some realizations as replacement, the function of being marked in square frame
Can be with different from the order marked in accompanying drawing generation.For example, two continuous square frames can essentially be held substantially in parallel
OK, they can also be performed in the opposite order sometimes, and this is depending on involved function.It is also noted that block diagram and/or
The combination of each square frame in flow chart and the square frame in block diagram and/or flow chart, can use function as defined in execution or dynamic
The special hardware based system made is realized, or can be realized with the combination of specialized hardware and computer instruction.
It is described above the presently disclosed embodiments, described above is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport
The principle, practical application or the technological improvement to the technology in market of each embodiment are best being explained, or is leading this technology
Other those of ordinary skill in domain are understood that each embodiment disclosed herein.
Claims (24)
1. a kind of method for being used to determine the channel information of channel, including：
Channel condition information reference symbol CSI-RS, the CSI-RS of the reception from base station are utilized by the base station and are mapped to day
The CSI-RS of part transmission antenna port in linear array and send；
The local channel letter corresponding to the channel of the part transmit antenna port is determined by measuring the CSI-RS
Breath；And
Based on the partial channel knowledge, the overall channel information of the channel is determined.
2. according to the method described in claim 1, wherein the CSI-RS be by the base station using the first CSI-RS and
What the second CSI-RS was sent, first CSI-RS is mapped to the row transmission antenna end in the aerial array
Mouthful, the second CSI-RS is mapped to a line transmission antenna port in the aerial array, and determines to correspond to the portion
The partial channel knowledge of point transmit antenna port includes：
It is determined that corresponding to the Part I channel information of the row transmission antenna port；And
It is determined that corresponding to the Part II channel information of a line transmission antenna port.
3. method according to claim 2, wherein determining that overall channel information includes：
The overall letter is determined by calculating the product of the Part I channel information and the Part II channel information
Road information.
4. according to the method described in claim 1, wherein the CSI-RS is to utilize the 3rd CSI-RS, the by the base station
What four CSI-RSs and the 5th CSI-RS were sent, the 3rd CSI-RS is mapped to one in the aerial array
Row transmission antenna port, the 4th CSI-RS be mapped to it is in a row transmission antenna port, with two kinds of polarization modes
In a kind of polarization mode first group of transmission antenna port, the 5th CSI-RS is mapped to the row transmission antenna
Second group of transmission antenna port in port, with another polarization mode in described two polarization modes, and determine
Include corresponding to the partial channel knowledge of the part transmit antenna port：
It is determined that corresponding to the Part III channel information of a line transmission antenna port；
It is determined that corresponding to the Part IV channel information of first group of transmission antenna port；And
It is determined that corresponding to the Part V channel information of second group of transmission antenna port.
5. method according to claim 4, wherein determining that overall channel information includes：
Based on the Part III channel information, the Part IV channel information and the Part V channel information, pass through
Product is calculated to determine the overall channel information.
6. according to the method described in claim 1, wherein the CSI-RS is to be utilized to be mapped to the 3rd group of transmission by the base station
6th CSI-RS of antenna port is sent with the 7th CSI-RS for being mapped to the 4th group of transmission antenna port, described
3rd group of transmission antenna port distribution is in the first antenna block of the aerial array, the 4th group of transmission antenna port distribution
In the second antenna block of the aerial array, the first antenna block is more than second antenna block, and determines to correspond to
The partial channel knowledge of the part transmit antenna port includes：
It is determined that corresponding to the Part VI channel information of the 3rd group of antenna port；And
It is determined that corresponding to the Part VII channel information of the 4th group of transmission antenna port.
7. method according to claim 6, wherein determining that overall channel information includes：
The overall letter is determined by calculating the product of the Part VI channel information and the Part VII channel information
Road information.
8. according to the method described in claim 1, wherein the CSI-RS is to be utilized to be respectively mapped to multigroup hair by the base station
What multigroup CSI-RS of antennas port was sent, and determine the local channel corresponding to the part transmit antenna port
Information includes：
It is determined that corresponding respectively to some channel informations of multigroup transmission antenna port.
9. method according to claim 8, wherein determining that overall channel information includes：
By determining the overall channel information to the linear synthesis of the multiple partial channel knowledge application.
10. according to the method described in claim 1, in addition to：
It is determined that at least one of following：
The first channel condition information corresponding with the partial channel knowledge；And
Second channel status information corresponding with the overall channel information.
11. method according to claim 10, in addition to：
At least one of into the first channel condition information and second channel status information described in the base station feedback.
12. method according to claim 11, in addition to：
First channel condition information is fed back with the period 1；And
The second channel status information is fed back with second round, the second round is more than the period 1.
13. a kind of equipment for being used to determine the channel information of channel, including：
Reference symbol receiving module, is configured as receiving the channel condition information reference symbol CSI-RS from base station, described
CSI-RS is sent by the base station using the CSI-RS for the part transmission antenna port being mapped in aerial array；
Partial channel knowledge determining module, is configured as determining that corresponding to the part launches day by measuring the CSI-RS
The partial channel knowledge of the channel of line end mouthful；And
Overall channel information determining module, is configured as determining the overall channel of the channel based on the partial channel knowledge
Information.
14. equipment according to claim 13, wherein the CSI-RS is to utilize the first CSI-RS by the base station
Sent with the second CSI-RS, first CSI-RS is mapped to the row transmission antenna end in the aerial array
Mouthful, the second CSI-RS is mapped to a line transmission antenna port in the aerial array, and the partial channel knowledge
Determining module is configured to：
It is determined that corresponding to the Part I channel information of the row transmission antenna port；And
It is determined that corresponding to the Part II channel information of a line transmission antenna port.
15. equipment according to claim 14, wherein the overall channel information determining module is configured to：
The overall letter is determined by calculating the product of the Part I channel information and the Part II channel information
Road information.
16. equipment according to claim 13, wherein the CSI-RS be by the base station using the 3rd CSI-RS,
What the 4th CSI-RS and the 5th CSI-RS were sent, the 3rd CSI-RS is mapped in the aerial array
A line transmission antenna port, the 4th CSI-RS be mapped to it is in a row transmission antenna port, with two kinds of polarization sides
A kind of first group of transmission antenna port of polarization mode in formula, the 5th CSI-RS is mapped to a row and sends day
Second group of transmission antenna port in line end mouthful, with another polarization mode in described two polarization modes, and institute
Partial channel knowledge determining module is stated to be configured to：
It is determined that corresponding to the Part III channel information of a line transmission antenna port；
It is determined that corresponding to the Part IV channel information of first group of transmission antenna port；And
It is determined that corresponding to the Part V channel information of second group of transmission antenna port.
17. equipment according to claim 16, wherein the overall channel information determining module is configured to：
Based on the Part III channel information, the Part IV channel information and the Part V channel information, pass through
Product is calculated to determine the overall channel information.
18. equipment according to claim 13, wherein the CSI-RS is to be utilized to be mapped to the 3rd group of hair by the base station
6th CSI-RS of antennas port is sent with the 7th CSI-RS for being mapped to the 4th group of transmission antenna port, institute
The 3rd group of transmission antenna port distribution is stated in the first antenna block of the aerial array, the 4th group of transmission antenna port point
Cloth is in the second antenna block of the aerial array, and the first antenna block is more than second antenna block, and the part
Channel information determining module is configured to：
It is determined that corresponding to the Part VI channel information of the 3rd group of antenna port；And
It is determined that corresponding to the Part VII channel information of the 4th group of transmission antenna port.
19. equipment according to claim 18, wherein the overall channel information determining module is configured to：
The overall letter is determined by calculating the product of the Part VI channel information and the Part VII channel information
Road information.
20. equipment according to claim 13, wherein the CSI-RS is multigroup using being respectively mapped to by the base station
What multigroup CSI-RS of transmission antenna port was sent, and the partial channel knowledge determining module is further configured
For：
It is determined that corresponding respectively to some channel informations of multigroup transmission antenna port.
21. equipment according to claim 20, wherein the overall channel information determining module is configured to：
By determining the overall channel information to the linear synthesis of the multiple partial channel knowledge application.
22. equipment according to claim 13, in addition to：
Channel condition information determining module, is configured to determine that at least one of following：
The first channel condition information corresponding with the partial channel knowledge；And
Second channel status information corresponding with the overall channel information.
23. equipment according to claim 22, in addition to：
Information feedback module, is configured as to the first channel condition information and second channel described in the base station feedback
At least one of in status information.
24. equipment according to claim 23, wherein the information feedback module is configured to：
First channel condition information is fed back with the period 1；And
The second channel status information is fed back with second round, the second round is more than the period 1.
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| CN201610196814.6A CN107294880B (en) | 2016-03-31 | 2016-03-31 | Method and apparatus for determining channel information |
| PCT/IB2017/000462 WO2017168255A1 (en) | 2016-03-31 | 2017-03-31 | Method and apparatus for determining channel information |
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| WO2023212006A1 (en) * | 2022-04-26 | 2023-11-02 | Interdigital Patent Holdings, Inc. | Methods and apparatus for reference signal overhead reduction in wireless communication systems |
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| CN112470412B (en) * | 2018-08-30 | 2023-12-26 | 上海诺基亚贝尔股份有限公司 | Frequency domain time domain channel hardening and overhead reduction |
| 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 |
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| WO2017168255A1 (en) | 2017-10-05 |
| CN107294880B (en) | 2020-07-31 |
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