CN106160934B - A kind of CSI feedback method, apparatus and relevant device - Google Patents
A kind of CSI feedback method, apparatus and relevant device Download PDFInfo
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Abstract
The invention discloses a kind of CSI feedback method, apparatus and relevant devices, for guaranteeing the spreadability of CSI-RS while reducing CSI-RS expense.The CSI feedback method that network side is implemented, comprising: send channel state information reference signals CSI-RS configuration information to user equipment (UE), the CSI-RS configuration information includes for the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B of UE configuration；The CSI back information that the UE is sent is received, the CSI feedback information includes the vertical dimension CSI-RS port-mark that the UE is determined according to the measurement result that the vertical dimension CSI-RS to the port B is measured and ties up pre-coding matrix PMI with horizontal to the order instruction RI that the horizontal Victoria C SI-RS of the port the 2N measurement result measured is determined.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of CSI feedback method, apparatus and relevant devices.
Background technique
In LTE-Advanced (Long Term Evolution-Advanced, senior long term evolution) system, definition
CSI-RS (Channel State Information-Reference Signal, channel state information reference signals).
CSI-RS is down-bound pilot frequency signal, is the known letter of one kind that receiving end is supplied to by transmitting terminal for useful signal channel measurement
Number.Channel state information (Channel State Information, CSI) feedback can be divided into periodic feedback mode and non-week
Phase feedback model, wherein CSI is by order instruction (Rank Indicator, RI), pre-coding matrix instruction (PrecodingMatrix
Indicator, PMI) and channel quality instruction (Channel Quality Indicator, CQI) composition.Wherein, aperiodic
CSI feedback, working-flow are as follows:
1, base station carries out the measurement of CSI-RS in some downlink subframe triggering user, and sends CSI-RS；
2, terminal obtains triggering message, and measures CSI-RS signal in corresponding subframe, estimates useful signal quality；
3, terminal determines channel state information according to useful signal quality；
4, end delay at least K subframe, (wherein K refers to terminal to feeding back channel state information on available sub-frame of uplink
Calculate the processing time of CSI)；
5, base station receives the CSI of terminal feedback in corresponding sub-frame of uplink.
3D-MIMO (3DimensionsMultiple-Input Multiple-Out-put, 3 dimension multiple-input and multiple-outputs) skill
Art is the subject under discussion that 3GPP RAN1 is being discussed, 3D-MIMO mainly uses two-dimensional array antenna, can be retouched with following parameter
(M, N, P, Q) is stated, wherein M indicates the oscillator number of a like-polarized array antenna, and N indicates that the columns of aerial array, P=2 indicate
Using dual polarized antenna, MTXRUIndicate the number of the corresponding transceiver channel of same array antenna, a transceiver channel may correspond to
Several antenna oscillators, Q=2N*MTXRUIndicate the TXRU total number for including in the corresponding TXRU array of the aerial array, for example,
(M, N, P, MTXRU)=(8,4,2,4) corresponding aerial array can use Fig. 1 (left side) expression, and corresponding Q=32, TXRU array can
To be indicated with Fig. 1 (right side), TXRU# (mTXRU,nTXRU) indicate some TXRU.
CSI feedback enhancing is an important issue in 3D-MIMO, and there are mainly three types of schemes at present.
Scheme 1: the CSI feedback of Full port CSI-RS (all ports CSI-RS), the end CSI-RS in the program are based on
Mouth number is equal with TXRU number, and the relationship to map one by one, as shown in Figure 2.Using the program, UE is anticipated that most comprehensive
Channel information, i.e. UE can obtain the channel information between UE and all transmission antenna ports.But when using the program, a side
Face, CSI-RS expense is big, and the target that the expense of the 8 port ports CSI-RS is about 1.5%, 3D-MIMO in LTE at present is maximum branch
64 TXRU are held, the expense of corresponding 64port CSI-RS is about 12%, on the other hand, certain in the total transmission power of guarantee
In the case of, TXRU number is more, and the transmission power of single CSI-RS is just smaller, causes the covering of CSI-RS limited.
Scheme 2: being based on the CSI feedback of Partial port CSI-RS (the part port CSI-RS), and the program uses two sets
Independent CSI-RS is mapped to the 2N TXRU of TXRU array a line, separately wherein the port number of a set of CSI-RS is 2N one by one
The port number of a set of CSI-RS is MTXRU, it is mapped to the M of a certain column of TXRU array one by oneTXRUA TXRU, as shown in Figure 3.Using this
Scheme, although CSI-RS expense is small, with (M, N, P, MTXRU)=(8,4,2,8) for, the CSI-RS expense of the program is about
3%, still, one side UE can only estimate partial channel knowledge, and specifically UE can only obtain UE and certain a line/a certain column are sent out
The channel needs of channel between antennas port, other antenna ports are estimated according to information such as antenna oscillator spacing；It is another
Aspect, in the case where guaranteeing that total transmission power is certain, TXRU number is more, and the transmission power of single CSI-RS is just smaller, leads
Cause the covering of CSI-RS limited.
Scheme 3: the CSI feedback of Beamformed CSI-RS (CSI-RS of wave beam forming), CSI-RS in the program are based on
The wave beam forming that have passed through vertical dimension, by the different vertical dimension shape-endowing weight value of B group by the M of same rowTXRUA TXRU is mapped to B
On a vertical dimension wave beam, each vertical dimension wave beam is corresponded to a set of CSI-RS (port number of every set is 2N), therefore shared B set
CSI-RS, as shown in Figure 4.Using the program, each port CSI-RS have passed through vertical dimension wave beam forming, the covering of CSI-RS
Performance is more preferable；But it can be led since base station needs to carry out beam appropriate (wave beam) selection if the beam of selection is improper
The CSI-RS signal quality that family receives of applying is deteriorated, and influences channel estimation.Wherein, the selection of Beam can lean on base station real completely
It is existing, it can also be by the feedback of UE.If based entirely on base station realization, uplink and downlink channel reciprocity when being typically based on long,
Beam accuracy of selection may be poor, and is difficult that frequency domain is supported selectively to dispatch；If by the feedback of UE, based on existing
Standard needs to correspond to multiple vertical dimension beam for the multiple CSI-process of user configuration, and user needed week time
The CSI feedback of multiple CSI-process is completed in phase, to help base station to carry out beam selection.The CSI-process of configuration is got over
More, feedback cycle is shorter, and the expense of CSI-RS is also bigger.With vertical dimension 4 beam, (M, N, P, MTXRU)=(8,4,2,8), it is anti-
For presenting period 5ms, the expense of CSI-RS is about 6%.
It can be seen that in the existing CSI feedback method based on CSI-RS or CSI-RS expense is larger or CSI-
The covering performance of RS is poor, how while reducing CSI-RS expense, guarantees that the spreadability of CSI-RS becomes in the prior art
One of the technical problems that are urgent to solve.
Summary of the invention
The embodiment of the present invention provides a kind of CSI feedback method, apparatus and relevant device, for reducing CSI-RS expense
Meanwhile guaranteeing the spreadability of CSI-RS.
The embodiment of the present invention provides a kind of CSI feedback method that network side is implemented, comprising:
Channel state information CSI-RS configuration information is sent to user equipment (UE), the CSI-RS configuration information includes for institute
State the horizontal Victoria C SI-RS of the port vertical dimension channel state information reference signals CSI-RS and 2N of the port B of UE configuration, wherein
B is preset value, and N is the columns of dual-polarized antenna array；
The CSI feedback information that the UE is sent is received, the CSI feedback information includes that the UE hangs down according to the port B
The vertical dimension CSI-RS port-mark and the level of the port 2N is tieed up that the measurement result that straight Victoria C SI-RS is measured is determined
The order instruction RI and horizontal dimension pre-coding matrix PMI that the measurement result that CSI-RS is measured is determined.
The vertical dimension CSI-RS of the port B is sent to the UE in accordance with the following methods:
Using B group vertical beam shape-endowing weight value, formed and the B one-to-one B in the port vertical dimension CSI-RS vertical waves
Beam；
The port each vertical dimension CSI-RS is respectively mapped to send at least one resource element RE of running time-frequency resource.
It will be before being sent at least one RE of each vertical dimension CSI-RS port mapping to running time-frequency resource, further includes:
Figuration is carried out to every row antenna in aerial array using preset one group of broadcast shape-endowing weight value in horizontal dimension.
The horizontal Victoria C SI-RS of the port 2N is sent to the UE in accordance with the following methods:
The horizontal Victoria C SI-RS of the port 2N of configuration is respectively mapped to send at least one RE.
Before the horizontal Victoria C SI-RS of the port 2N of configuration is respectively mapped to send at least one RE, further includes:
Shape-endowing weight value is vertically broadcasted using preset one group in vertical dimension to assign each array antenna in aerial array
Shape.
The CSI feedback method that the network side is implemented, further includes:
According to the port-mark of the vertical dimension CSI-RS, vertical dimension pre-coding matrix is determined；
According to RI and horizontal dimension PMI, horizontal dimension pre-coding matrix is determined；
It is generated according to the vertical dimension pre-coding matrix and horizontal dimension pre-coding matrix for sending the shared letter of physical down
The pre-coding matrix of road PDSCH.
The embodiment of the present invention provides a kind of CSI feedback device, comprising:
Transmission unit, it is described for sending channel state information reference signals CSI-RS configuration information to user equipment (UE)
CSI-RS configuration information include for the UE configuration the port B the port vertical dimension CSI-RS and 2N horizontal Victoria C SI-RS,
In, B is preset value, and N is the columns of dual-polarized antenna array；
Receiving unit, the CSI back information sent for receiving the UE, the CSI feedback information
The port vertical dimension CSI-RS determined including the UE according to the measurement result that the vertical dimension CSI-RS to the port B is measured
It identifies and precoding is tieed up with horizontal to the order instruction RI that the horizontal Victoria C SI-RS of the port the 2N measurement result measured is determined
Matrix PMI.
The transmission unit is specifically used for utilizing B group vertical beam shape-endowing weight value, be formed and the B end vertical dimension CSI-RS
The one-to-one B vertical beam of mouth；The port each vertical dimension CSI-RS is respectively mapped to at least one money of running time-frequency resource
It is sent on source element RE.
The transmission unit, being also used to will be at least one RE of each vertical dimension CSI-RS port mapping to running time-frequency resource
Before transmission, figuration is carried out to every row antenna in aerial array using preset one group of broadcast shape-endowing weight value in horizontal dimension.
The transmission unit, specifically for the horizontal Victoria C SI-RS of the port 2N of configuration is respectively mapped at least one RE
Upper transmission.
The transmission unit, specifically for the horizontal Victoria C SI-RS of the port 2N of configuration is respectively mapped at least one RE
Before upper transmission, shape-endowing weight value is vertically broadcasted using preset one group in vertical dimension, each array antenna in aerial array is carried out
Figuration.
The CSI feedback device, further includes:
Determination unit determines vertical dimension pre-coding matrix for the port-mark according to the vertical dimension CSI-RS；According to
RI and horizontal dimension PMI, determines horizontal dimension pre-coding matrix；And according to the vertical dimension pre-coding matrix and horizontal dimension precoding
Matrix generates the pre-coding matrix for sending Physical Downlink Shared Channel PDSCH.
The embodiment of the present invention provides a kind of base station, including above-mentioned CSI feedback device.
The embodiment of the present invention provides a kind of CSI feedback method that user equipment side is implemented, comprising:
Receiving channel state information reference signal CSI-RS configuration information, the CSI-RS configuration information include the port B
The horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N, wherein B is preset value, and N is the columns of dual-polarized antenna array；
The measurement feedback port the vertical dimension CSI-RS mark measured according to the vertical dimension CSI-RS to the port B
Know；
According to the measurement feedback order instruction RI measured of the horizontal Victoria C SI-RS to the port 2N and horizontal dimension
Pre-coding matrix PMI.
Wherein, in accordance with the following methods according to the measurement feedback measured to the vertical dimension CSI-RS of the port B
Vertical dimension CSI-RS port-mark:
Measure the received signal strength of the port each vertical dimension CSI-RS, the maximum vertical dimension of feedback reception signal strength
CSI-RS port-mark.
The embodiment of the present invention provides a kind of user equipment, comprising:
Receiving unit, is used for receiving channel state information reference signal CSI-RS configuration information, and the CSI-RS matches confidence
Breath includes the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B；
Measuring unit, the horizontal Victoria C SI-RS for vertical dimension CSI-RS and the port 2N respectively to the port B
It measures；
Feedback unit, for vertical according to the measurement feedback measured to the vertical dimension CSI-RS of the port B
Victoria C SI-RS port-mark；And referred to according to the measurement feedback order that the horizontal Victoria C SI-RS to the port 2N is measured
Show RI and horizontal dimension pre-coding matrix PMI.
The measuring unit, specifically for measuring the received signal strength of the port each vertical dimension CSI-RS；
The feedback unit is specifically used for the maximum vertical dimension CSI-RS port-mark of feedback reception signal strength.
The embodiment of the present invention provides a kind of CSI feedback system, including above-mentioned base station and user equipment.
CSI feedback method, apparatus provided in an embodiment of the present invention and relevant device are user device configuration two by network side
Cover independent CSI-RS, after UE respectively measures two sets of CSI-RS of network side configuration, according to vertical dimension CSI-RS into
The measurement result of row measurement feeds back vertical dimension port-mark to network side, according to the measurement knot measured to horizontal Victoria C SI-RS
Fruit can guarantee the spreadability of CSI-RS while reducing CSI-RS expense to network side feedback RI and horizontal PMI.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is aerial array and TXRU array schematic diagram in the prior art；
Fig. 2 is the mapping schematic diagram of CSI-RS port number and TXRU in scheme one in the prior art；
Fig. 3 is the mapping schematic diagram of CSI-RS port number and TXRU in scheme two in the prior art；
Fig. 4 is the mapping schematic diagram of CSI-RS port number and TXRU in scheme three in the prior art；
Fig. 5 is the implementation process diagram for the CSI feedback method that network side is implemented in the embodiment of the present invention；
Fig. 6 is in the embodiment of the present invention, and vertical dimension CSI-RS sends schematic diagram；
Fig. 7 is the structural schematic diagram of CSI feedback device in the embodiment of the present invention；
Fig. 8 is in the embodiment of the present invention, and user equipment implements the implementation process diagram of CSI feedback method；
Fig. 9 is the structural schematic diagram of user equipment in the embodiment of the present invention；
Figure 10 is the structural schematic diagram of CSI feedback system in the embodiment of the present invention.
Specific embodiment
In order to guarantee the spreadability of CSI-RS while reducing CSI-RS expense, the embodiment of the invention provides one kind
CSI feedback method, apparatus and relevant device.
Below in conjunction with Figure of description, preferred embodiment of the present invention will be described, it should be understood that described herein
Preferred embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention, and in the absence of conflict, this hair
The feature in embodiment and embodiment in bright can be combined with each other.
As shown in figure 5, implement the implementation process diagram of CSI feedback method for network side provided in an embodiment of the present invention,
The following steps are included:
S51, CSI-RS configuration information is sent to UE.
Wherein, CSI-RS configuration information includes the vertical of the port B for UE (user equipment, User Equipment) configuration
The horizontal Victoria C SI-RS (H-CSI-RS) of Victoria C SI-RS (channel state information reference signals) (V-CSI-RS) and the port 2N.
Wherein, the port-mark of V-CSI-RS is respectively { 1,2,3 ..., B }, and B is preset value, and value can be according to reality
It needs to be determined that N is the columns of dual-polarized antenna array.
S52, the CSI feedback information that UE is sent is received.
Wherein, CSI feedback information includes that UE is determined according to the measurement result that the vertical dimension CSI-RS to the port B is measured
Vertical dimension CSI-RS port-mark out and the RI that the horizontal Victoria C SI-RS of the port the 2N measurement result measured is determined
With horizontal PMI.
Specifically, the V-CSI-RS that UE configures network side is measured, according to measurement result to network side signal strength
The port-mark of maximum V-CSI-RS.And the H-CSI-RS that UE configures network side is measured, according to measurement result to
Network side feeds back RI, horizontal PMI and CQI.The V-CSI-RS port-mark that network side is fed back according to UE determines vertical dimension precoding
Matrix WV, horizontal dimension pre-coding matrix W is determined according to the RI of UE feedback and horizontal dimension PMIH, according to vertical dimension pre-coding matrix WV
Pre-coding matrix W is tieed up with levelHGenerate the pre-coding matrix for sending PDSCH (Physical Downlink Shared Channel).Preferably, net
Network can generate final pre-coding matrix by Kroneck product
When it is implemented, network side can send the V-CSI-RS of the port B for UE configuration in accordance with the following methods: using in advance
If the different vertical beam shape-endowing weight value of B groupIt is formed vertical with B
The one-to-one B vertical beam in the port Victoria C SI-RS, the port vertical dimension CSI-RS after each wave beam forming are respectively mapped to
It is sent at least one RE (resource element) of running time-frequency resource, the vertical dimension CSI-RS after B wave beam forming collectively forms a set of
V-CSI-RS, wherein the different vertical beam shape-endowing weight value of B group can be it is static, can also semi-static or dynamic adjustment,
To adapt to the spatial distribution of intra-cell users, enhance the accuracy of beam selection.
For example, the vertical dimension CSI-RS after every kind of wave beam forming can be respectively mapped on 1 RE of running time-frequency resource, such as
Shown in Fig. 6, for the resource impact schematic diagram as B=4, R1 indicates that vertical dimension passes through
CSI-RS after figuration, corresponds to vertical beam 1, and R2 indicates that vertical dimension passes throughIt assigns
CSI-RS after shape corresponds to vertical beam 2, and so on, CSI-RS in 4 is shared, 4 vertical dimension wave beams are corresponded respectively to,
4 RE are occupied on each PRB altogether.
It more preferably, can be default by one group in level dimension in order to further enhance the covering performance of vertical dimension CSI-RS
Horizontal broadcast shape-endowing weight value WH,Broad=[w1,w2,…,w2N] 2N antenna of row every in two-dimensional antenna array be subjected to figuration,
To enhance the covering of CSI-RS.Level broadcast shape-endowing weight value can be it is static, can also semi-static or dynamic adjustment, with
The spatial distribution for adapting to intra-cell users, to further enhance the covering performance of CSI-RS.
Horizontal Victoria C SI-RS for the port 2N configured for UE, can be by the horizontal Victoria C SI-RS of the port 2N of configuration points
It is not mapped at least one RE and sends.As N=2/4/8, the design of the horizontal Victoria C SI-RS before R12 can be reused.
Preferably, can vertically broadcast tax by preset one group in vertical dimension to enhance the covering performance of CSI-RS
Shape weight WV,Broad=[w1,w2,…,wMTXRU] by the M of each column in two-dimensional antenna arrayTXRUA antenna carries out figuration, with enhancing
CSI-RS covering.Wherein, vertically broadcast shape-endowing weight value can be it is static, can also semi-static or dynamic adjustment, to adapt to
The spatial distribution of intra-cell users further enhances the covering performance of CSI-RS.
CSI feedback method provided in an embodiment of the present invention, by the way that two sets of independent CSI-RS, including one is respectively configured for UE
The horizontal dimension non-precoded of CSI-RS and a set of port 2N after covering the vertical dimension wave beam forming of the port B are (without prelisting
Code) CSI-RS, after UE measures the vertical dimension CSI-RS of the port B, according to measurement result to network side feedback signal
Best vertical dimension port-mark, after UE measures the horizontal Victoria C SI-RS of the port 2N, according to measurement result to network side
Feed back RI and horizontal PMI.Compared with the first scheme in the prior art, CSI-RS expense can either be reduced, and can be enhanced
CSI-RS covering performance can enhance the covering performance of CSI-RS compared with second scheme in the prior art, and existing
The third scheme in technology is compared, and can reduce the expense of CSI-RS, thus, realizing is reducing the same of CSI-RS expense
When, it ensure that the covering performance of CSI-RS.
Based on the same inventive concept, a kind of CSI feedback device, base station and user equipment are additionally provided in the embodiment of the present invention
The CSI feedback method and user equipment and system of implementation, the principle solved the problems, such as due to the above method, device and equipment and network
It is similar that CSI feedback method is implemented in side, therefore the implementation of the above method, device and equipment may refer to network side and implement CSI feedback
Method, overlaps will not be repeated.
As shown in fig. 7, being the structural schematic diagram of CSI feedback device provided in an embodiment of the present invention, comprising:
Transmission unit 71, for sending CSI-RS configuration information to user equipment (UE).
CSI-RS configuration information includes the horizontal dimension of the port vertical dimension CSI-RS and 2N for the port B of UE configuration
CSI-RS, wherein B is preset value, and N is the columns of dual-polarized antenna array.
Receiving unit 72, for receiving the CSI feedback information of UE transmission.
CSI feedback information includes that UE is determined according to the measurement result that the vertical dimension CSI-RS to the port B is measured
Vertical dimension CSI-RS port-mark and the order instruction that the horizontal Victoria C SI-RS of the port the 2N measurement result measured is determined
RI and horizontal dimension pre-coding matrix PMI.
Wherein, transmission unit 71 can be used for tieing up using preset B group vertical beam shape-endowing weight value, be formed vertical with B
The one-to-one B vertical beam in the port Victoria C SI-RS；The port each vertical dimension CSI-RS is respectively mapped to running time-frequency resource
It is sent at least one resource element RE.
Preferably, transmission unit 71 can be also used for each vertical dimension CSI-RS port mapping to running time-frequency resource at least
Before being sent on one RE, every row antenna in aerial array is carried out using preset one group of broadcast shape-endowing weight value in horizontal dimension
Figuration.
When it is implemented, transmission unit 71 can be used for for the horizontal Victoria C SI-RS of the port 2N of configuration being respectively mapped to
It is sent on a few RE.Preferably, transmission unit 71 can be also used for respectively reflecting the horizontal Victoria C SI-RS of the port 2N of configuration
It is mapped to before being sent at least one RE, vertically broadcasts shape-endowing weight value in aerial array using preset one group in vertical dimension
Each array antenna carries out figuration.
When it is implemented, CSI feedback device provided in an embodiment of the present invention can also include determination unit, for according to vertical
The port-mark of straight Victoria C SI-RS, determines vertical dimension pre-coding matrix；According to RI and horizontal dimension PMI, horizontal dimension precoding is determined
Matrix；And the precoding for sending PDSCH is generated according to the vertical dimension pre-coding matrix and horizontal dimension pre-coding matrix
Matrix.
For convenience of description, above each section is divided by function describes respectively for each module (or unit).Certainly, exist
Implement to realize the function of each module (or unit) in same or multiple softwares or hardware when the present invention.
When it is implemented, above-mentioned CSI feedback device can be set in base station, the CSI for implementing above-mentioned offer by base station is anti-
Feedback method.
As shown in figure 8, implementing the implementation process diagram of CSI feedback method for user equipment, may comprise steps of:
S81, CSI-RS configuration information is received.
Wherein, CSI-RS configuration information includes the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B,
In, B is preset value, and N is the columns of dual-polarized antenna array.
S82, it is marked according to the measurement feedback port vertical dimension CSI-RS measured to the vertical dimension CSI-RS of the port B
Know.
Specifically, user equipment measures the received signal strength of the port each vertical dimension CSI-RS respectively, and to network side
The maximum vertical dimension CSI-RS port-mark of feedback reception signal strength.
S83, PMI is tieed up according to the horizontal Victoria C SI-RS of the port the 2N measurement feedback RI measured and level.
It should be noted that when it is implemented, step S82 and S83 have no it is successive execute sequence, step S83 can also be first
It is executed in step S82.
As shown in figure 9, being the structural schematic diagram of user equipment provided in an embodiment of the present invention, comprising:
Receiving unit 91, for receiving CSI-RS configuration information.
Wherein, CSI-RS configuration information includes the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B,
In, B is preset value, and N is the columns of dual-polarized antenna array.
Measuring unit 92, the horizontal Victoria C SI-RS for the port vertical dimension CSI-RS and 2N respectively to the port B are surveyed
Amount；
Feedback unit 93, for according to the measurement feedback vertical dimension measured to the vertical dimension CSI-RS of the port B
CSI-RS port-mark；And according to the measurement feedback RI measured of the horizontal Victoria C SI-RS to the port 2N and horizontal dimension
PMI。
Wherein, measuring unit 92 can be used for measuring the received signal strength of the port each vertical dimension CSI-RS；Feedback
Member 93 can be used for the maximum vertical dimension CSI-RS port-mark of feedback reception signal strength.
For convenience of description, above each section is divided by function describes respectively for each module (or unit).Certainly, exist
Implement to realize the function of each module (or unit) in same or multiple softwares or hardware when the present invention.
It as shown in Figure 10, is the structural schematic diagram of CSI feedback system provided in an embodiment of the present invention, including 101 He of base station
Above-mentioned user equipment 102, wherein above-mentioned CSI feedback device is provided in base station.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of CSI feedback method characterized by comprising
Channel state information reference signals CSI-RS configuration information is sent to user equipment (UE), the CSI-RS configuration information includes
For the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B of UE configuration, wherein B is preset value, and N is double
The columns of polarized antenna arrays, wherein send the vertical dimension CSI-RS of the port B to the UE in accordance with the following methods: in vertical dimension
Using B group vertical beam shape-endowing weight value, formed and the B one-to-one B vertical beam in the port vertical dimension CSI-RS；It will be each
The port vertical dimension CSI-RS is respectively mapped to send at least one resource element RE of running time-frequency resource；
The CSI back information that the UE is sent is received, the CSI feedback information includes the UE according to B
Vertical dimension CSI-RS port-mark that the measurement result that the vertical dimension CSI-RS of port is measured is determined and to the port 2N
The order instruction RI and horizontal dimension pre-coding matrix PMI that the measurement result that horizontal Victoria C SI-RS is measured is determined.
2. the method as described in claim 1, which is characterized in that each vertical dimension CSI-RS port mapping is arrived running time-frequency resource
Before being sent at least one RE, further includes:
Figuration is carried out to every row antenna in aerial array using preset one group of broadcast shape-endowing weight value in horizontal dimension.
3. the method as described in claim 1, which is characterized in that send the horizontal dimension of the port 2N to the UE in accordance with the following methods
CSI-RS:
The horizontal Victoria C SI-RS of the port 2N of configuration is respectively mapped to send at least one RE.
4. method as claimed in claim 3, which is characterized in that mapped respectively by the horizontal Victoria C SI-RS of the port 2N of configuration
Before being sent on at least one RE, further includes:
Shape-endowing weight value is vertically broadcasted using preset one group in vertical dimension, and figuration is carried out to each array antenna in aerial array.
5. the method as described in claim 1, which is characterized in that further include:
According to the port-mark of the vertical dimension CSI-RS, vertical dimension pre-coding matrix is determined；
According to RI and horizontal dimension PMI, horizontal dimension pre-coding matrix is determined；
It is generated according to the vertical dimension pre-coding matrix and horizontal dimension pre-coding matrix for sending Physical Downlink Shared Channel
The pre-coding matrix of PDSCH.
6. a kind of CSI feedback device characterized by comprising
Transmission unit, for sending channel state information reference signals CSI-RS configuration information, the CSI- to user equipment (UE)
RS configuration information includes for the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B of UE configuration, specific use
In utilizing B group vertical beam shape-endowing weight value, formed and the B one-to-one B vertical beam in the port vertical dimension CSI-RS；It will be every
The port a vertical dimension CSI-RS is respectively mapped to send at least one resource element RE of running time-frequency resource, wherein B is default
Value, N are the columns of dual-polarized antenna array；
Receiving unit, the CSI feedback information sent for receiving the UE, the CSI feedback information includes the UE according to B
Vertical dimension CSI-RS port-mark that the measurement result that the vertical dimension CSI-RS of port is measured is determined and to the port 2N
The order instruction RI and horizontal dimension pre-coding matrix PMI that the measurement result that horizontal Victoria C SI-RS is measured is determined.
7. device as claimed in claim 6, which is characterized in that
The transmission unit is also used to send at least one RE of each vertical dimension CSI-RS port mapping to running time-frequency resource
Before, figuration is carried out to every row antenna in aerial array using preset one group of broadcast shape-endowing weight value in horizontal dimension.
8. device as claimed in claim 6, which is characterized in that
The transmission unit, specifically for the horizontal Victoria C SI-RS of the port 2N of configuration to be respectively mapped to send out at least one RE
It send.
9. device as claimed in claim 8, which is characterized in that
The transmission unit, specifically for the horizontal Victoria C SI-RS of the port 2N of configuration to be respectively mapped to send out at least one RE
Before sending, shape-endowing weight value is vertically broadcasted using preset one group in vertical dimension, each array antenna in aerial array is assigned
Shape.
10. device as claimed in claim 6, which is characterized in that further include:
Determination unit determines vertical dimension pre-coding matrix for the port-mark according to the vertical dimension CSI-RS；According to RI and
Level dimension PMI determines horizontal dimension pre-coding matrix；And according to the vertical dimension pre-coding matrix and horizontal dimension pre-coding matrix
Generate the pre-coding matrix for sending Physical Downlink Shared Channel PDSCH.
11. a kind of base station, which is characterized in that including device described in claim 6~10 any claim.
12. a kind of CSI feedback method characterized by comprising
Receiving channel state information reference signal CSI-RS configuration information, the CSI-RS configuration information include the vertical of the port B
The horizontal Victoria C SI-RS of the port Victoria C SI-RS and 2N, wherein B is preset value, and N is the columns of dual-polarized antenna array, wherein B
The vertical dimension CSI-RS of port is sent in accordance with the following methods: vertical dimension utilize B group vertical beam shape-endowing weight value, formed and
The B one-to-one B vertical beam in the port vertical dimension CSI-RS；The port each vertical dimension CSI-RS is respectively mapped to time-frequency
It is sent at least one resource element RE of resource；
The measurement feedback vertical dimension CSI-RS port-mark measured according to the vertical dimension CSI-RS to the port B；
The measurement feedback order instruction RI and horizontal dimension measured according to the horizontal Victoria C SI-RS to the port 2N prelists
Code matrix PMI.
13. method as claimed in claim 12, which is characterized in that in accordance with the following methods according to the vertical dimension to the port B
The measurement feedback vertical dimension CSI-RS port-mark that CSI-RS is measured:
Measure the received signal strength of the port each vertical dimension CSI-RS, the maximum vertical dimension CSI-RS of feedback reception signal strength
Port-mark.
14. a kind of user equipment characterized by comprising
Receiving unit is used for receiving channel state information reference signal CSI-RS configuration information, the CSI-RS configuration information packet
Include the horizontal Victoria C SI-RS of the port vertical dimension CSI-RS and 2N of the port B, wherein the vertical dimension CSI-RS of the port B be according to
What lower method was sent: utilizing B group vertical beam shape-endowing weight value in vertical dimension, formed a pair of with the B port vertical dimension CSI-RS one
The B vertical beam answered；The port each vertical dimension CSI-RS is respectively mapped to at least one resource element RE of running time-frequency resource
Upper transmission；
Measuring unit, the horizontal Victoria C SI-RS for vertical dimension CSI-RS and the port 2N respectively to the port B are carried out
Measurement；
Feedback unit, for according to the measurement feedback signal strength measured to the vertical dimension CSI-RS of the port B
Maximum vertical dimension CSI-RS port-mark；And the measurement knot measured according to the horizontal Victoria C SI-RS to the port 2N
Fruit feeds back order instruction RI and horizontal dimension pre-coding matrix PMI.
15. user equipment as claimed in claim 14, which is characterized in that
The measuring unit, specifically for measuring the received signal strength of the port each vertical dimension CSI-RS；
The feedback unit is specifically used for the maximum vertical dimension CSI-RS port-mark of feedback reception signal strength.
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| CN201510171257.8A CN106160934B (en) | 2015-04-10 | 2015-04-10 | A kind of CSI feedback method, apparatus and relevant device |
| PCT/CN2016/078800 WO2016161963A1 (en) | 2015-04-10 | 2016-04-08 | Csi feedback method, apparatus, and related device |
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| US10965356B2 (en) | 2017-01-31 | 2021-03-30 | Lg Electronics Inc. | Method for reporting channel state information in wireless communication system and apparatus therefor |
| CN115664476A (en) * | 2017-02-06 | 2023-01-31 | 中兴通讯股份有限公司 | Channel information feedback and receiving method and device |
| AU2017401773B2 (en) | 2017-02-28 | 2022-05-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communication method, terminal device, and network device |
| CN108631847B (en) | 2017-03-24 | 2021-06-01 | 华为技术有限公司 | Method for transmitting channel state information, terminal equipment and network equipment |
| CN112399567A (en) * | 2019-08-14 | 2021-02-23 | 华为技术有限公司 | Method and device for transmitting signals |
| WO2021243632A1 (en) * | 2020-06-04 | 2021-12-09 | Qualcomm Incorporated | Decoupled port selection and coefficients reporting |
| CN115694758A (en) * | 2021-07-31 | 2023-02-03 | 华为技术有限公司 | Channel state information feedback method and communication device |
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