CN106899522A - A kind of sending method of channel state information reference signals CSI-RS, device and base station - Google Patents
A kind of sending method of channel state information reference signals CSI-RS, device and base station Download PDFInfo
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- CN106899522A CN106899522A CN201510952006.3A CN201510952006A CN106899522A CN 106899522 A CN106899522 A CN 106899522A CN 201510952006 A CN201510952006 A CN 201510952006A CN 106899522 A CN106899522 A CN 106899522A
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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
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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
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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Abstract
The invention discloses a kind of sending method of channel state information reference signals CSI-RS, device and base station, its method includes：According to CSI-RS and the mapping relations of antenna, combined by 8 port CSI-RS of two subframes and send corresponding 16 port CSI-RS to user terminal UE；Wherein, every group of 8 port CSI-RS include the CSI-RS of the antenna of the phase difference of antenna horizontal dimensions, vertical dimensions and polarised direction；Receive UE and measure the channel condition information fed back after every group of 8 port CSI-RS.The present invention is combined as the mapping mode of 16 port CSI-RS by 8 port CSI-RS of two subframes, ensure the accuracy of channel condition information measurement feedback, and further by every group of 8 port CSI-RS phase differences comprising antenna horizontal dimensions, vertical dimensions and polarised direction, it is further ensured that the precision of the PMI of channel condition information, so as to improve the accuracy of CSI-RS channel estimations, it is ensured that the normal operation of systematic function.
Description
Technical field
The present invention relates to radio communication and channel quality measurement technique field, more particularly to a kind of channel status letter
Cease sending method, device and the base station of reference signal CSI-RS.
Background technology
Existing communication system, such as：LTE (long evolving system, Long Term Evolution) system,
WiMAX (worldwide interoperability for microwave accesses, Worldwide Interoperability for Microwave Access),
Or WLAN (WLAN, Wireless Local Area based on wireless transmission protocol 802.11n
Networks) system etc., use is all traditional 2DMIMO (multiple-input and multiple-output, Multiple-IZPut
Multiple-Output) technology, its general principle is improved by the two-dimensional space free degree on horizontal plane
Transmission quality, raising power system capacity.With the development of Antenna Design framework, in order to improve GSM
Efficiency of transmission and improve Consumer's Experience, it is necessary to fully excavate the vertical space free degree, traditional 2D MIMO
Technology expands to 3D MIMO technologies, makes full use of the free degree of three dimensions to improve systematic function.
The antenna frame of 2DMIMO is to use multiple array elements so as to obtain day higher by vertical dimensions
Line gain.And each bay in vertical dimensions uses fixed weights, to ensure to be obtained in vertical dimensions
To the beam patterns for needing.Therefore, 2DMIMO technologies have no idea to carry out the wave beam forming of vertical dimensions.
3DMIMO, can be by control in order to sufficiently use MIMO technology in the vertical dimension.
The weighted factor of vertical dimensions different antenna element forms different wave beams.Vertical dimensions ripple can effectively be distinguished
Beam, so as to provide the multiuser multiplexing of vertical dimensions, hoist capacity.Traditional LTE system supports maximum 8
Be extended for the port number of antenna by the design of antenna, 3D MIMO, supports such as 16,32,64,128
Deng the dimensional antenna form of port number.
CSI-RS (channel state information reference signals, Channel State in existing standard
Information-Reference Signals) configuration as shown in figure 1, expense be 1 RE (Resource Unit,
Resource Element)/PRB (Physical Resource Block, Physical Resource Block)/port (port).
CSI-RS has various configurations in existing standard, such as there is 5 kinds of configuration (such as Fig. 1 in the FDD system of 8-port
It is shown), notify which kind of CSI-RS UE (user terminal, User Equipment) uses by high-level signaling
Configuration, CSI-RS is that full bandwidth each PRB sends in every kind of configuration.
UE estimated channel quality from corresponding CSI-RS position, selects optimal RI (orders
Indicate, Rank Indication), PMI (pre-coding matrix instruction, Precoding Matrix Indicator),
CQI (channel quality indicate, Channel Quality Indicator), and feed back to eNB (evolved base station,
Evolved Node B)。
In extensive antenna 3D MIMO standardization, for the enhancing side of CSI-RS configurations (pattern)
To predominantly 16 ports, the 3D MIMO of more port numbers are then realized using wave beam forming CSI-RS, from
And avoid excessive CSI-RS expenses.Standardization now discusses the port CSI-RS pattern of design 16.
The 16 passage antenna configurations that consider main at present be 4H2V as shown in Figure 2 (4 horizontal dual polarized antennas,
Vertical direction is 2 passages).
At present, CSI-RS pattern designs Main way is to be combined as using existing 8 port CSI-RS
16 port CSI-RS, can use combining form as shown in Figure 3, but in view of in a subframe simultaneously
Transmit 16 port CSI-RS need 16RE/PRB, existing 40RE can only support two kinds configuration, resource
Configuration underaction, and the expense (overhead) of the RS for present sub-frame is larger.
Another mode is to send 8 port CSI-RS respectively using two adjacent sub-frames, and combination obtains 16
Port CSI-RS, it is specific as shown in figure 4, so 40RE can support five kinds of configurations, resource distribution spirit
Activity is higher.But, current main flow codebook design schemes major embodiment horizontal dimensions, vertical dimensions and polarization
Three, direction phase information, in the form of two-stage codebook：W=W1W2, W1For it is long when code book, water
The Kronecker products of flat dimension and vertical dimensions code book：
W2It is code book in short-term, the phase difference between major embodiment polarization.
The mode that the current 8 port CSI-RS using adjacent sub-frame are combined as 16 port CSI-RS has following
It is several：
Mode one：As shown in figure 5, antenna is separated according to row, sent in two subframes respectively, so hung down
The phase difference of straight dimension needs two CSI-RS subframes of experience just to measure, and influences PMI precision.
Mode two：As shown in fig. 6, antenna is separated according to polarised direction, sent in two subframes respectively,
So polarization phase difference need experience two CSI-RS subframes can just measure, influence PMI precision.
Mode three：As shown in fig. 7, antenna is separated according to row, sent in two subframes respectively, such water
The phase difference of flat dimension need experience two CSI-RS subframes can just measure, influence PMI precision.
Channel-quality feedback relies primarily on the channel estimation of CSI-RS, if CSI-RS channel estimations are inaccurate
Really, systematic function will be directly affected.In 8+8 is combined as the mode of 16 port CSI-RS, it is contemplated that
The change of phase difference that time change is brought, how the mapping relations between designing antenna, port and transmission subframe,
The phase difference that more accurate horizontal dimensions, vertical dimensions and polarised direction can just be obtained is significant.
The content of the invention
The invention provides a kind of sending method of channel state information reference signals CSI-RS, device and base
Stand, the channel condition information measurement feedback for solving 16 port CSI-RS in the prior art is not accurate enough,
So as to influence the problem of systematic function.
According to one aspect of the present invention, there is provided a kind of hair of channel state information reference signals CSI-RS
Delivery method, including：
According to the mapping relations of CSI-RS and antenna, by 8 port CSI-RS of two subframes combine to
User terminal UE sends corresponding 16 port CSI-RS；Wherein, in every group of 8 port CSI-RS at least
Including：Correspond to whole horizontal positions the first polarised direction antenna on same upright position
CSI-RS, corresponds to whole upright positions the first polarised direction antenna on same level position
CSI-RS, and corresponding to the first polarised direction antenna at same antenna position and the second polarised direction antenna
CSI-RS；
Receive UE and measure the channel condition information fed back after every group of 8 port CSI-RS.
Wherein, four CSI-RS in the port CSI-RS of one of which 8 correspond respectively to be hung down positioned at first
Four antennas of the polarised direction of horizontal position first of straight position；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second upright position at least
One antenna of the polarised direction of horizontal position first；
At least two CSI-RS in 8 port CSI-RS correspond respectively to same on the second upright position
The first polarised direction antenna and the second polarised direction antenna of one horizontal position；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, four CSI-RS in the port CSI-RS of one of which 8 correspond respectively to be located at the first water
Four antennas of the polarised direction of upright position first that prosposition is put；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second horizontal level at least
One antenna of the polarised direction of upright position first；
In 8 port CSI-RS at least two respectively CSI-RS correspond respectively to be located at the second horizontal level on
Same upright position the first polarised direction antenna and the second polarised direction antenna；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, according to CSI-RS and the mapping relations of antenna, by two 8 port CSI-RS of subframe
Combining the step of sending corresponding 16 port CSI-RS to user terminal UE includes：
According to the mapping relations of CSI-RS and antenna, by 16 antenna mappings to two CSI-RS of subframe
In Resource Unit RE queues；Wherein, RE queues include the corresponding RE set of one group of 8 port CSI-RS；
By RE queues, corresponding 16 port CSI-RS is sent to user terminal.
According to another aspect of the invention, a kind of channel state information reference signals CSI-RS is additionally provided
Dispensing device, including：
Sending module, for the mapping relations according to CSI-RS and antenna, by two 8 ports of subframe
CSI-RS is combined and is sent corresponding 16 port CSI-RS to user terminal UE；Wherein, every group of 8 ports
At least include in CSI-RS：The whole horizontal positions first corresponded on same upright position polarize
The CSI-RS of directional aerial, the whole upright positions first corresponded on same level position polarize
The CSI-RS of directional aerial, and corresponding to the first polarised direction antenna and the second pole at same antenna position
Change the CSI-RS of directional aerial；
Receiver module, the channel condition information fed back after every group of 8 port CSI-RS is measured for receiving UE.
Wherein, four CSI-RS in the port CSI-RS of one of which 8 correspond respectively to be hung down positioned at first
Four antennas of the polarised direction of horizontal position first of straight position；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second upright position at least
One antenna of the polarised direction of horizontal position first；
At least two CSI-RS in 8 port CSI-RS correspond respectively to same on the second upright position
The first polarised direction antenna and the second polarised direction antenna of one horizontal position；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, four CSI-RS in the port CSI-RS of one of which 8 correspond respectively to be located at the first water
Four antennas of the polarised direction of upright position first that prosposition is put；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second horizontal level at least
One antenna of the polarised direction of upright position first；
In 8 port CSI-RS at least two respectively CSI-RS correspond respectively to be located at the second horizontal level on
Same upright position the first polarised direction antenna and the second polarised direction antenna；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, sending module includes：
Processing unit, for the mapping relations according to CSI-RS and antenna, by 16 antenna mappings to two
In the Resource Unit RE queues of the CSI-RS of subframe；Wherein, RE queues include one group of 8 port CSI-RS
Corresponding RE set；
Transmitting element, for by RE queues, corresponding 16 port CSI-RS being sent to user terminal.
According to another aspect of the invention, a kind of base station, including channel status as described above are additionally provided
The dispensing device of information reference signal CSI-RS.
The beneficial effect of embodiments of the invention is：
The mapping mode of 16 port CSI-RS is combined as by 8 port CSI-RS of two subframes, it is ensured that
The accuracy of channel condition information measurement feedback, and further by every group of 8 port CSI-RS comprising day
The phase difference of line horizontal dimensions, vertical dimensions and polarised direction, is further ensured that the PMI of channel condition information
Precision, so as to improve the accuracy of CSI-RS channel estimations, it is ensured that the normal operation of systematic function.
Brief description of the drawings
Fig. 1 represents the configuration figure of 8 port CSI-RS in existing standard；
Fig. 2 represents the 4H2V form schematic diagrames of 16 passage antennas in 3DMIMO standards；
Fig. 3 represents the CSI-RS that 16 port CSI-RS are combined as using 8 port CSI-RS of a subframe
Configuration figure；
Fig. 4 represents the CSI-RS that 16 port CSI-RS are combined as using 8 port CSI-RS of two subframes
Configuration figure；
Fig. 5 represents the antenna configuration figure of the specific implementation one of Fig. 4；
Fig. 6 represents the antenna configuration figure of the specific implementation two of Fig. 4；
Fig. 7 represents the antenna configuration figure of the specific implementation three of Fig. 4；
Fig. 8 represents that the flow of the sending method of channel state information reference signals CSI-RS of the invention is illustrated
Figure；
Fig. 9 represents antenna packet form exemplary plot of the invention；
Figure 10 represents the 2H4V form schematic diagrames of 16 passage antennas in 3DMIMO standards；
Figure 11 represents that the module of the dispensing device of channel state information reference signals CSI-RS of the invention is illustrated
Figure.
Specific embodiment
Exemplary embodiment of the invention is more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing
Exemplary embodiment of the invention, it being understood, however, that may be realized in various forms the present invention without should be by
Embodiments set forth here is limited.Conversely, there is provided these embodiments are able to be best understood from this
Invention, and can by the scope of the present invention it is complete convey to those skilled in the art.
Embodiment one
Feed back not accurate enough in order to the channel condition information for solving 16 port CSI-RS in the prior art is measured
Problem, as shown in figure 8, The embodiment provides a kind of channel state information reference signals
The sending method of CSI-RS, specifically includes：
Step S801：According to CSI-RS and the mapping relations of antenna, by two 8 port CSI-RS of subframe
Combine and send corresponding 16 port CSI-RS to user terminal UE.
Wherein, every group of 8 port CSI-RS include antenna horizontal dimensions, vertical dimensions and polarised direction
The CSI-RS that the CSI-RS of the antenna of phase difference, i.e. each CSI-RS subframe send includes Representation Level
The first channel condition information measurement resource of dimension phase difference, characterizes the second channel shape of vertical dimensions phase difference
State information measurement resource, and characterize the 3rd channel condition information measurement resource of the phase difference of polarised direction.
That is, at least including in every group of 8 port CSI-RS：Correspond to complete on same upright position
The CSI-RS of portion's horizontal position the first polarised direction antenna, corresponds to complete on same level position
The CSI-RS of portion's upright position the first polarised direction antenna, and corresponding at same antenna position first
The CSI-RS of polarised direction antenna and the second polarised direction antenna.
With in such as Fig. 4 16 port CSI-RS are combined as using 8 port CSI-RS of two CSI-RS subframes
CSI-RS configuration as a example by, wherein, 16 port CSI-RS can respectively exist according to the order of the number of presetting
Sent in two subframes, the two CSI-RS subframes can be same periods and there is fixed sub-frame offset
What offset differences sent (is configurable to different sub-frame offsets, so as to reduce 2 CSI-RS subframes
Between time interval；Wherein, two minimum intervals of CSI-RS subframes can be 1ms, can so contract
Two transmission times of 8 port CSI-RS of short transmission, obtain more preferable PMI precision), can also be by
According to existing standard periodically (can 5ms, 10ms, 20,40 or 80ms cycle) send.It is false
If the corresponding antenna serial numbers of 8 port CSI-RS of first CSI-RS subframes transmission are 0-7, second
The corresponding antenna serial numbers of 8 port CSI-RS that CSI-RS subframes send are 8-15.So serial number 0-7 or
The corresponding positional information of antenna of 8-15 is：Whole horizontal positions of same upright position include at least one
The antenna of individual first polarised direction or radio-frequency channel, first of whole upright positions on same level position
The antenna of polarised direction or radio-frequency channel, the antenna of the first polarised direction or radio-frequency channel at same antenna position
Antenna or radio-frequency channel with the second polarised direction, wherein, 8 ports that a CSI-RS subframe sends
The sum of antenna or radio-frequency channel at the corresponding all positions of CSI-RS is 8, as one group of 8 port CSI-RS
After corresponding antenna or radio-frequency channel determine, the port CSI-RS of another set 8 corresponds at rest position
Antenna or radio-frequency channel.
By taking the antenna configurations of the 4H2V shown in Fig. 2 as an example, four in the port CSI-RS of one of which 8
CSI-RS corresponds respectively to be located at four antennas of the polarised direction of horizontal position first of the first upright position；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively at least one on the second upright position
The antenna of the polarised direction of horizontal position first；At least two CSI-RS in 8 port CSI-RS are right respectively
Ying Yu is located at the first polarised direction antenna and the second polarization side on the second upright position at same level position
To antenna.I.e.：This 8 antennas or radio-frequency channel at least 4 are located at 4 positions of the first row respectively,
At least 2 positions in not going together, and the polarised direction of at least two is different but co-located
Antenna or radio-frequency channel；Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
In addition, by taking the antenna configurations of the 2H4V shown in Figure 10 as an example, in the port CSI-RS of one of which 8 four
Individual CSI-RS corresponds respectively to be located at four days of the polarised direction of upright position first of first level position
Line；Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second horizontal level at least
One antenna of the polarised direction of upright position first；At least two difference in 8 port CSI-RS
CSI-RS corresponds respectively to be located at the first polarised direction antenna of same upright position on the second horizontal level
With the second polarised direction antenna.I.e.：This 8 antennas or radio-frequency channel at least 4 are located at first row respectively
4 positions at, at least 2 positions in different lines, and the polarised direction of at least two is different
But co-located antenna or radio-frequency channel；Wherein another group 8 port CSI-RS correspond respectively to remain
Antenna at remaining position.
It is worthy of note that, when the mapping relations of 8 port CSI-RS and antenna serial number change, correspondence is real
The numbering of border antenna also changes according to above-mentioned rule, and embodiments of the invention one do not do to the sequence number of antenna
It is specific to limit, as long as ensureing that every group of 8 port CSI-RS include antenna horizontal dimensions, vertical dimensions and pole
Change the CSI-RS of the antenna of the phase difference in direction.
Step S802：Receive UE and measure the channel condition information fed back after every group of 8 port CSI-RS.
User terminal UE is combined as 16 ports receiving base station using 8 port CSI-RS of two subframes
After CSI-RS, the corresponding antenna resources positions of corresponding CSI-RS are estimated channel quality, select
Optimal RI, PMI and CQI.Wherein, RI is used to refer to the effective data number of plies of PDSCH, accuses
Tell maximum codeword (CW, the Code Word) number that base station UE can be supported now.That is RI=1,
1CW；RI>1,2CW (wherein in LTE system, 2) maximum number of codewords that current agreement is supported is.
PMI is used to refer to the index (index) of codebook set, and the name according to PMI is known that PM is exactly square
Battle array, but matrix is not one, but have many, so being accomplished by being numbered matrix, each matrix
There are an index, that is, PMI.Signal has many paths in transmittance process, and some path signals are good,
Some path signals are poor, then how modulated signal, just put to the proof with PMI precodings, precoding is LTE
One extremely complex process of physical layer, the purpose is to layer is mapped on antenna, the purpose of PMI precodings
It is the signal good to circuit, weighting is more, and the information of transmission is more, to signal difference, weighting is few, the letter of transmission
It is number few, so as to can guarantee that maximum, effective data transfer.CQI is used to indicate the quality of present channel quality,
CQI is corresponding with the signal to noise ratio size of channel, span 0~31.When CQI values are 0, channel
Quality is worst；When CQI values are 31, channel quality is best.General common value for 12~
24, base station according to the size of CQI determine transport block size, the number of HS-PDSCH channel yardages,
Coded system and modulation system.
Wherein, UE just starts to measure CSI-RS after first group of 8 port CSI-RS is received
Corresponding channel condition information is obtained, antenna horizontal dimensions is included due to every group of 8 port CSI-RS, is hung down
The CSI-RS of the antenna of the phase difference of straight dimension and polarised direction, therefore UE can be according to accurate CSI-RS
RI, PMI and CQI of survey calculation respective channels, and base station is fed back to, so that accurately money is done in base station
Dispatch in source, it is ensured that the systematic function of whole communication system.
Embodiment two
Above example one simply describes the present invention using two 8 ports of CSI-RS sub-frame configurations
CSI-RS combinations send the method for the transmission channel state information reference signals of 16 port CSI-RS, this reality
Applying example will be described further based on a pair of the method for above-described embodiment.
Pointed out in above-described embodiment one：Every group of 8 port CSI-RS include antenna horizontal dimensions, vertical dimension
The CSI-RS that the CSI-RS of the antenna of the phase difference of degree and polarised direction, i.e. each CSI-RS subframe send
The first channel condition information measurement resource comprising Representation Level dimension phase difference, characterizes vertical dimensions phase
Poor second channel status information measurement resource, and the 3rd channel status for characterizing the phase difference of polarised direction
Information measurement resource.
Further, it is accurate because horizontal dimensions, vertical dimensions and polarised direction are three different indexs
The phase difference of horizontal dimensions is determined, it is necessary to two parameter indexs of unified vertical dimensions and polarised direction；Similarly,
It is the accurate phase difference for determining vertical dimensions, then needs two parameter indexs of uniform level dimension and polarised direction；
Determine two parameter indexs of polarised direction for accurate, then need two parameters of uniform level dimension and vertical dimensions
Index.Therefore, four CSI-RS in every group of 8 port CSI-RS correspond respectively to vertical positioned at first
Four antennas of the polarised direction of whole horizontal positions first of position, with the antenna of 4H2V forms in Fig. 2
As a example by array, the antenna including the first polarised direction or radio-frequency channel at 4 positions of the first row, so
The two parameter indexs unification of vertical dimensions and polarised direction can be ensured, more accurately horizontal dimensions phase is can obtain
Potential difference；Other at least one CSI-RS in 8 port CSI-RS corresponds respectively to the second upright position up to
A few antenna for the polarised direction of horizontal position first, i.e. include extremely at least one position of the second row
A few antenna for first polarised direction, can so ensure two parameter index systems of horizontal dimensions and polarised direction
One, can obtain more accurate vertical dimensions phase difference；Remaining CSI-RS difference in 8 port CSI-RS
The antenna at the first upright position any level position is corresponded to, and/or, the second upright position is present
Two antennas of the polarised direction of horizontal position second of antenna, i.e. any one above-mentioned include the first polarization
The also antenna including one second polarised direction at the position of directional aerial, can so ensure horizontal dimensions and vertical
Two parameter index unifications of dimension, can obtain accurate polarised direction phase difference.To sum up, according to above-mentioned
16 antennas or radio-frequency channel are divided into two groups by rule, and by this two groups of antennas or the CSI-RS of radio-frequency channel
Configured according to CSI-RS set in advance and sent, you can ensure that UE receives accurate CSI-RS, so that
Survey calculation obtains accurate channel quality information.
Specifically, the antenna point of 16 port CSI-RS is combined as using 8 port CSI-RS of two subframes
Prescription formula can be found in packet example as shown in Figure 9.Antenna packet mode in the Fig. 9 for being worth pointing out only is made
It is exemplary illustration, other meet above-mentioned regular packet situation, required for also belonging to the embodiment of the present invention
Protection.
Further, the specific steps of step S801 include in embodiment one：
According to the mapping relations of CSI-RS and antenna, by 16 antenna mappings to two CSI-RS of subframe
In Resource Unit RE queues.
Wherein, RE queues include the corresponding RE set of one group of 8 port CSI-RS.The wherein RE gathers
Including 40 RE, each RE corresponds to an antenna.Said by taking the configuration shown in Fig. 4 as an example below
It is bright, understand that 8 port CSI-RS of first CSI-RS sub-frame transmission are right respectively with reference to Fig. 4 and Fig. 9
In eight antennas, that is, should correspond to antenna or the radio-frequency channel of serial number 0-7.40 RE of RE will be included
Set is divided into 10 groups of RE subsets, then four antennas in the corresponding antennas of 8 port CSI-RS correspond to one
Individual RE subsets, wherein, four antennas in the corresponding antennas of 8 port CSI-RS are corresponded into first five set RE
In subset, i.e. the antenna of port serial number 0,1,4 and 5 corresponds respectively to first five set as shown in Figure 4
In RE subsets；And remaining four antenna in the corresponding antennas of 8 port CSI-RS are mapped in five groups afterwards respectively
In RE subsets, i.e. the antenna of port serial number 2,3,6 and 7 corresponds respectively to as shown in Figure 4 rear five
In group RE subsets.So, 40RE can support that 5 kinds of different CSI-RS are configured, and resource distribution is flexible,
Be conducive to making full use of for resource.
Similarly, 8 port CSI-RS of second CSI-RS sub-frame transmission correspond respectively to eight antennas,
Antenna or the radio-frequency channel of serial number 8-15 are corresponded to, wherein, port serial number 8,9,12 and 13
Antenna is corresponded respectively in first five set RE subsets as shown in Figure 4, the and of port serial number 10,11,13
15 antenna is corresponded respectively in rear five groups of RE subsets as shown in Figure 4.
It is worthy of note that when the mapping relations of 8 port CSI-RS and antenna serial number change, correspondence is actual
The numbering of antenna also changes according to above-mentioned rule, and embodiments of the invention do not do specifically to the sequence number of antenna
Limit, as long as ensureing that every group of 8 port CSI-RS include antenna horizontal dimensions, vertical dimensions and polarization side
To phase difference antenna CSI-RS.
By RE queues, corresponding 16 port CSI-RS is sent to user terminal.
Here RE queues refer to the set of corresponding RE in the CSI-RS configurations being pre-configured with, and utilize
These RE resources send to user terminal corresponding CSI-RS, so that user terminal is receiving first
After 8 port CSI-RS of group, just start to measure CSI-RS and obtain corresponding channel condition information,
Due to every group of 8 port CSI-RS phase differences including antenna horizontal dimensions, vertical dimensions and polarised direction
Antenna CSI-RS, therefore UE can according to the RI of accurate CSI-RS survey calculations respective channels,
PMI and CQI, and base station is fed back to, so that accurate scheduling of resource is done in base station, it is ensured that whole communication system
Systematic function.
Embodiment three
Above example one and embodiment two describe the hair of channel state information reference signals CSI-RS respectively
Delivery method, is described further below in conjunction with accompanying drawing to its corresponding device.
Wherein, according to another aspect of the embodiment of the present invention, a kind of channel condition information reference is additionally provided
The dispensing device of signal CSI-RS, as shown in figure 11, specifically includes：
Sending module 1101, for the mapping relations according to CSI-RS and antenna, by two the 8 of subframe
Port CSI-RS is combined and is sent corresponding 16 port CSI-RS to user terminal UE；Wherein, every group 8
At least include in the CSI-RS of port：Correspond to the whole horizontal positions first on same upright position
The CSI-RS of polarised direction antenna, corresponds to the whole upright positions first on same level position
The CSI-RS of polarised direction antenna, and corresponding to the first polarised direction antenna at same antenna position and
The CSI-RS of two polarised direction antennas；
Receiver module 1102, for receiving the channel shape that UE sends according to every group of 8 port CSI-RS of measurement
State information.
Wherein, four CSI-RS in 8 port CSI-RS correspond respectively to be located at the four of the first upright position
The antenna of the polarised direction of individual horizontal position first；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second upright position at least
One antenna of the polarised direction of horizontal position first；
At least two CSI-RS in 8 port CSI-RS correspond respectively to same on the second upright position
The first polarised direction antenna and the second polarised direction antenna of one horizontal position；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, four CSI-RS in 8 port CSI-RS correspond respectively to be located at the four of first level position
The antenna of the polarised direction of individual upright position first；
Other at least one CSI-RS in 8 port CSI-RS is corresponded respectively on the second horizontal level at least
One antenna of the polarised direction of upright position first；
In 8 port CSI-RS at least two respectively CSI-RS correspond respectively to be located at the second horizontal level on
Same upright position the first polarised direction antenna and the second polarised direction antenna；
Wherein another group 8 port CSI-RS correspond respectively to antenna at rest position.
Wherein, sending module includes：
Processing unit, for the mapping relations according to CSI-RS and antenna, by 16 antenna mappings to two
In two Resource Unit RE queues of the CSI-RS of subframe；Wherein, RE queues include one group of 8 port
The corresponding RE set of CSI-RS；
Transmitting element, for by RE queues, corresponding 16 port CSI-RS being sent to user terminal.
It should be noted that the device is and the channel condition information described in above-described embodiment one and embodiment two
The corresponding device of reference signal CSI-RS sending methods, all implementations are fitted in above method embodiment
In for the embodiment of the device, identical technique effect can be also reached.
Example IV
According to another aspect of the embodiment of the present invention, a kind of base station is additionally provided, including such as the institute of embodiment three
The dispensing device of the channel state information reference signals CSI-RS for stating.
Above-described is the preferred embodiment of the present invention, it should be pointed out that for the ordinary people of the art
For member, some improvements and modifications can also be made under the premise of principle of the present invention is not departed from, these
Improvements and modifications are also within the scope of the present invention.
Claims (9)
1. a kind of sending method of channel state information reference signals CSI-RS, it is characterised in that including：
According to the mapping relations of CSI-RS and antenna, by 8 port CSI-RS of two subframes combine to
User terminal UE sends corresponding 16 port CSI-RS；Wherein, in 8 port CSI-RS described in every group
At least include：Correspond to whole horizontal positions the first polarised direction antenna on same upright position
CSI-RS, corresponds to whole upright positions the first polarised direction antenna on same level position
CSI-RS, and corresponding to the first polarised direction antenna at same antenna position and the second polarised direction antenna
CSI-RS；
Receive the UE and measure the channel condition information fed back after 8 port CSI-RS described in every group.
2. the sending method of channel state information reference signals CSI-RS according to claim 1,
Characterized in that,
Four CSI-RS in 8 port CSI-RS described in one of which correspond respectively to vertical positioned at first
Four antennas of the polarised direction of horizontal position first of position；
Other at least one CSI-RS in the 8 port CSI-RS corresponds respectively to the second upright position
The antenna of the upper polarised direction of at least one horizontal position first；
At least two CSI-RS in the 8 port CSI-RS correspond respectively to vertical positioned at described second
The first polarised direction antenna and the second polarised direction antenna at same level position on position；
8 port CSI-RS correspond respectively to antenna at rest position wherein described in another group.
3. the sending method of channel state information reference signals CSI-RS according to claim 1,
Characterized in that,
Four CSI-RS in 8 port CSI-RS described in one of which correspond respectively to be located at first level
Four antennas of the polarised direction of upright position first of position；
Other at least one CSI-RS in the 8 port CSI-RS corresponds respectively to the second horizontal level
The antenna of the upper polarised direction of at least one upright position first；
In the 8 port CSI-RS at least two respectively CSI-RS correspond respectively to be located at described second
The first polarised direction antenna and the second polarised direction antenna of the same upright position on horizontal level；
8 port CSI-RS correspond respectively to antenna at rest position wherein described in another group.
4. the sender of the channel state information reference signals CSI-RS according to Claims 2 or 3
Method, it is characterised in that according to CSI-RS and the mapping relations of antenna, by two 8 ports of subframe
CSI-RS combines the step of sending corresponding 16 port CSI-RS to user terminal UE to be included：
According to the mapping relations of CSI-RS and antenna, by 16 antenna mappings to two CSI-RS of subframe
In Resource Unit RE queues；Wherein, the RE queues include the corresponding RE of one group of 8 port CSI-RS
Set；
By the RE queues, corresponding 16 port CSI-RS is sent to user terminal.
5. a kind of dispensing device of channel state information reference signals CSI-RS, it is characterised in that including：
Sending module, for the mapping relations according to CSI-RS and antenna, by two 8 ports of subframe
CSI-RS is combined and is sent corresponding 16 port CSI-RS to user terminal UE；Wherein, 8 described in every group
At least include in the CSI-RS of port：Correspond to the whole horizontal positions first on same upright position
The CSI-RS of polarised direction antenna, corresponds to the whole upright positions first on same level position
The CSI-RS of polarised direction antenna, and corresponding to the first polarised direction antenna at same antenna position and
The CSI-RS of two polarised direction antennas；
Receiver module, the channel fed back after 8 port CSI-RS described in every group is measured for receiving the UE
Status information.
6. the dispensing device of channel state information reference signals CSI-RS according to claim 5,
Characterized in that,
Four CSI-RS in the 8 port CSI-RS correspond respectively to be located at the four of the first upright position
The antenna of the polarised direction of individual horizontal position first；
Other at least one CSI-RS in the 8 port CSI-RS corresponds respectively to the second upright position
The antenna of the upper polarised direction of at least one horizontal position first；
At least two CSI-RS in the 8 port CSI-RS correspond respectively to vertical positioned at described second
The first polarised direction antenna and the second polarised direction antenna at same level position on position；
8 port CSI-RS correspond respectively to antenna at rest position wherein described in another group.
7. the sending method of channel state information reference signals CSI-RS according to claim 5,
Characterized in that,
Four CSI-RS in 8 port CSI-RS described in one of which correspond respectively to be located at first level
Four antennas of the polarised direction of upright position first of position；
Other at least one CSI-RS in the 8 port CSI-RS corresponds respectively to the second horizontal level
The antenna of the upper polarised direction of at least one upright position first；
In the 8 port CSI-RS at least two respectively CSI-RS correspond respectively to be located at described second
The first polarised direction antenna and the second polarised direction antenna of the same upright position on horizontal level；
8 port CSI-RS correspond respectively to antenna at rest position wherein described in another group.
8. the transmission of the channel state information reference signals CSI-RS according to claim 6 or 7 is filled
Put, it is characterised in that the sending module includes：
Processing unit, for the mapping relations according to CSI-RS and antenna, by 16 antenna mappings to two
In the Resource Unit RE queues of the CSI-RS of subframe；Wherein, the RE queues include one group of 8 port
The corresponding RE set of CSI-RS；
Transmitting element, for by the RE queues, corresponding 16 port CSI-RS being sent to user
Terminal.
9. a kind of base station, it is characterised in that including the channel status as described in any one of claim 5~8
The dispensing device of information reference signal CSI-RS.
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