CN105577318B - A kind of CSI feedback method and apparatus in FD-MIMO transmission - Google Patents
A kind of CSI feedback method and apparatus in FD-MIMO transmission Download PDFInfo
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Abstract
The invention proposes the CSI feedback method and apparatus in a kind of FD-MIMO transmission.UE receives downlink reference signal in the first RS resource in step 1, and downlink signaling is received in step 1 and obtains the first PVI.Wherein, the first RS resource includes N number of port RS.The vector of first PVI index includes M element.Each of the first RS resource port RS is all respectively by M antenna element group using antenna virtualization schemes generation in target-subframe set, and corresponding antenna virtualization vector is all indicated by the first PVI.The N is greater than 1 positive integer, and the M is greater than 1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.Method of the invention makes UE effectively measure and feed back CSI using limited interface-free resources, saves the expense of interface-free resources.
Description
Technical field
The present invention relates to the schemes of feedback of channel information in mobile communication technology field, more particularly to using FD
(Full Dimension, Quan Weidu) MIMO (Multiple Input Multiple Output, Multiinputoutput) technology
CSI (Channel Status Information, channel state information) feedback scheme in mobile communication system.
Background technique
Traditional 3GPP (3rd Generation Partner Project, third generation cooperative partner program) LTE (Long
Term Evolution, long term evolution) in system, there are mainly two types of modes for the CSI feedback of mimo channel
Feed back implicit CSI
UE (User Equipment, user equipment) passes through detection CRS (Cell specific Reference
Signal, the specific reference signal of cell) either CSI-RS (CSI Reference Signal, channel status instruction reference
Signal) it obtains CIR (Channel Impulse Response, channel impulse response) and is mapped as implicit CSI.Implicit CSI packet
Include PMI (Precoding Matrix Indicator, pre-coding matrix instruction), CQI (Channel Quality
Indicator, channel quality instruction) etc. information.System side obtains MIMO down channel parameters by the implicit CSI that UE is fed back.
Attached drawing 1 is based on normal CP (Cyclic Prefix, cyclic prefix) in an existing LTE system in PRBP
(Physical Resource Block Pair, Physical Resource Block) interior CSI-RS pattern-has indicated CRS and DMRS simultaneously
(Demodulation Reference Signal, demodulated reference signal), one of lattice are the least resource lists of LTE
Position-RE (Resource Element, resource particle).The RE of oblique line mark can be used for sending CSI-RS.LTE system uses end
The concept definition RS resource of mouth: a port RS may be sent by an antenna element, it is also possible to be that mutiple antennas unit is logical
Antenna virtualization technology is crossed to be formed.LTE defines 4 kinds of CSI-RS port numbers: 1,2,4,8.
Implicit CSI is suitable for FDD (Frequency Duplex Division, frequency division duplex) system and TDD (Time
Duplex Division, time division duplex) system.
Feeding back uplink SRS (Sounding Reference Signal, interception reference signal)
UE sends uplink SRS, and system side obtains up channel CSI by demodulation SRS, under obtaining further according to link symmetry
Row CSI.This method is primarily adapted for use in TDD system.
3GPP R (Release, version) 12 has formulated 3D (Dimension, dimension) mimo channel model.In RAN (Radio
Access Network, wireless access network) in #65 meeting, FD-MIMO is approved for the research topic of 3GPP R13.FD-
MIMO most study reaches the scene of 64 physical antennas.The challenge that FD-MIMO is faced is how to ensure base station equipment
Accurately obtain downlink CSI.It is at present SRS and link are utilized based on TDD system about the main research of Massive MIMO
Symmetry is that system side obtains downlink CSI.In view of SRS limitation (such as FDD is difficult to adopt, radio frequency link it is asymmetric
Property, SRS pilot pollution, SRS resource is limited etc.), implicit CSI may still play the part of important angle in Massive MIMO transmission
Color.
For FD-MIMO, if UE directly feeds back the CSI for all physical antennas, brought empty overhead is in day
Line number amount is almost unacceptable when more.In view of the above-mentioned problems, the invention proposes the CSI in a kind of FD mimo system
Feedback method and device.
Summary of the invention
The invention discloses a kind of methods in UE, wherein includes the following steps:
Step A. receives downlink reference signal in the first RS resource
Step B. receives downlink signaling and obtains the first PVI (Precoding Vector Index, precoding vector index)
Wherein, the first RS resource includes N number of port RS.The vector of first PVI index includes M element.First RS resource
Each of the port RS be all raw using antenna virtualization scheme by M antenna element group respectively in target-subframe set
At corresponding antenna virtualization vector is by the vector of the first PVI index.The N is greater than 1 positive integer, and the M is greater than
1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.
In the above method, for each port RS, the UE collects M and is not substantially parallel with each other PVI (i.e. M PVI correspondence
The matrix of vector composition be full rank) after, can be according to receiving in the respective target-subframe set of corresponding M PVI
Downlink RS signal recover M antenna element group descending channel information (as long as M antenna element group the UE collect described in
Mapping to the port RS does not change during M is not substantially parallel with each other PVI, and descending channel information is correlation during this period
), therefore the down channel that the UE can utilize (the first RS resource) N number of port RS to recover MN antenna element group is believed
Breath.In addition, described method provide a kind of mechanism, i.e., base station can according to the statistics descending channel information of UE in current area from
The antenna virtualization vector of the first RS resource of adjustment of adaptation is to improve the precision of the side UE channel estimation, or supports low-frequency degree
Send the first RS resource.
As one embodiment, an antenna element group corresponding TXRU (Transceiver Unit, a transceiver
Unit).As one embodiment, an antenna element group includes 1 antenna element.As one embodiment, under described
Row signaling is high-level signaling, and the target-subframe set is the validity period of the downlink signaling.Implement to stand as one, under described
Row signaling is for configuring the CSI-RS-Config IE of the first RS resource (Information Element, information unit).Make
For one embodiment, the downlink signaling is physical layer signaling.As one embodiment, the F is 1, and the downlink signaling is
Descending scheduling DCI (Downlink Control Information, Downlink Control Information) is used for the dispatching downlink physics number of plies
According to the DCI of transmission, the target-subframe set is the scheduling subframe of the downlink signaling.As one embodiment, the end RS
The pattern of the corresponding port CSI-RS of pattern of the mouth in subframe.As one embodiment, the port RS is in subframe
The pattern of the corresponding port CRS of pattern.
As one embodiment, m-th of element is exp (2 π (m-1)/M) in the vector of the first PVI instruction, and m is from 1 to M.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further include:
Step A1. receives downlink reference signal in the 2nd RS resource.
The method also includes:
Step C. sends at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI.
Wherein, the 2nd RS resource includes the M port RS.If the first PMI exists, the reference RS of the first PMI is the first RS
Resource, based on the first PMI by base station use it is assumed that the first CQI is calculated.If the 2nd PMI exists, the ginseng of the 2nd PMI
Examining RS is the 2nd RS resource, and the 2nd PMI of calculation assumption of the first CQI is used by base station.
The reference RS of 2nd PMI is that the 2nd RS resource refers to: the PDSCH on CSI reference resources indicated by the 2nd PMI
Transmission antenna port used by (Physical Downlink Shared Channel, Physical Downlink Shared Channel) respectively and
The M port RS of the 2nd RS resource corresponds.The detailed description of the CSI reference resources refers to TS36.213.First PMI's
It is same as above with reference to the meaning that RS is the first RS resource.
As one embodiment, the first RS resource and the 2nd RS resource belong to the same CSI-RS subframe collection (CSI
subframe set).As one embodiment, the first PMI and the 2nd PMI are broadband PMI.It is described as one embodiment
Uplink RS is SRS.
As one embodiment, the port RS in the 2nd RS resource is all by N number of antenna element in given sub-frame set
Group uses antenna virtualization schemes generation.
Specifically, according to an aspect of the present invention, which is characterized in that the step B further include:
The step B1. downlink reference signal and phase in the K in the first RS resource sub-frame sets based on the received
The K PVI answered recovers the channel information of the corresponding M antenna element group in each port RS.The K is no less than M's
Positive integer.
As one embodiment, the rank of matrix of the K PVI composition is equal to M.
Specifically, according to an aspect of the present invention, which is characterized in that the first RS resource and the 2nd RS resource are in a son
Pattern in frame is pattern of the corresponding CSI-RS of one group of CSI-RS configuration in a subframe respectively.
The CSI-RS configuration is with reference to the table 6.10.5.2-1 in TS36.211.
The invention discloses a kind of methods in base station, wherein includes the following steps:
Step A. sends downlink reference signal in the first RS resource
Step B. sends downlink signaling and indicates the first PVI.
Wherein, the first RS resource includes N number of port RS.The vector of first PVI index includes M element.First RS resource
Each of the port RS be all raw using antenna virtualization scheme by M antenna element group respectively in target-subframe set
At corresponding antenna virtualization vector is by the vector of the first PVI index.The N is greater than 1 positive integer, and the M is greater than
1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.
As one embodiment, the downlink signaling is RRC (Radio Resource Control, wireless heterogeneous networks)
Layer signaling, before the target-subframe set is the subframe to the subframe that comes into force of RRC signaling next time that comes into force of the downlink signaling
One subframe.As one embodiment, the F is 1, and the downlink signaling is descending scheduling DCI, and the target-subframe set is institute
State the scheduling subframe of downlink signaling.As one embodiment, the corresponding end CSI-RS of pattern of the port RS in subframe
The pattern of mouth.As one embodiment, the pattern of the corresponding port CRS of pattern of the port RS in subframe.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further include:
Step A1. sends downlink reference signal in the 2nd RS resource.
The method also includes:
Step C. receives at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI.
Wherein, the 2nd RS resource includes the M port RS.If the first PMI exists, the reference RS of the first PMI is the first RS
Resource, based on the first PMI by the base station use it is assumed that the first CQI is calculated.If the 2nd PMI exists, the 2nd PMI
Reference RS be the 2nd RS resource, the 2nd PMI of calculation assumption of the first CQI is used by the base station.
As one embodiment, the first RS resource and the 2nd RS resource belong to the same CSI-RS subframe collection.
Specifically, according to an aspect of the present invention, which is characterized in that the first RS resource and the 2nd RS resource are in a son
Pattern in frame is pattern of the corresponding CSI-RS of one group of CSI-RS configuration in a subframe respectively.
The invention discloses a kind of user equipmenies, which is characterized in that the equipment includes:
First module: for receiving downlink reference signal in the first RS resource
Second module: the first PVI is obtained for receiving downlink signaling
Wherein, the first RS resource includes N number of port RS.The vector of first PVI index includes M element.First RS resource
Each of the port RS be all raw using antenna virtualization scheme by M antenna element group respectively in target-subframe set
At corresponding antenna virtualization vector is by the vector of the first PVI index.The N is greater than 1 positive integer, and the M is greater than
1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.
As one embodiment, above equipment is characterized in that, the equipment further include:
Third module: for sending at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI.
Wherein, the first module is also used to receive downlink reference signal in the 2nd RS resource.2nd RS resource includes M RS
Port.If the first PMI exist, the reference RS of the first PMI is the first RS resource, based on the first PMI by base station use it is assumed that
First CQI is calculated.If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the calculation assumption of the first CQI
2nd PMI is used by base station.
As one embodiment, above equipment is characterized in that, the second module is also used to the first RS resource based on the received
On K sub-frame sets on downlink reference signal and corresponding K PVI to recover each port RS corresponding
The channel information of M antenna element group.The K is no less than the positive integer of M.
The invention discloses a kind of base station equipments, which is characterized in that the equipment includes:
First module: for sending downlink reference signal in the first RS resource
Second module: the first PVI is indicated for sending downlink signaling
Wherein, the first RS resource includes N number of port RS.The vector of first PVI index includes M element.First RS resource
Each of the port RS be all raw using antenna virtualization scheme by M antenna element group respectively in target-subframe set
At corresponding antenna virtualization vector is by the vector of the first PVI index.The N is greater than 1 positive integer, and the M is greater than
1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.
As one embodiment, above equipment is characterized in that, the equipment further include:
Third module: for receiving at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI.
Wherein, the first module is also used to send downlink reference signal in the 2nd RS resource.2nd RS resource includes M RS
Port.If the first PMI exists, the reference RS of the first PMI is the first RS resource, is used based on the first PMI by the base station
It is assumed that the first CQI is calculated.If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the meter of the first CQI
It calculates and assumes that the 2nd PMI is used by the base station.
This problem of excessive empty overhead is occupied for the CSI that RS and UE is fed back is measured in FD mimo system, this
A kind of method and apparatus of CSI-RS configuration and corresponding CSI feedback of disclosure of the invention.According to the method for the present invention, UE being capable of benefit
The descending channel information of more antenna element group is recovered with the less port RS.In addition, base station can be according to current area
The antenna virtualization vector of adaptive the first RS resource of adjustment of the statistics descending channel information of middle UE is estimated with improving the side UE channel
The precision of meter.Method of the invention makes UE effectively measure and feed back CSI using limited interface-free resources, saves and eats dishes without rice or wine to provide
The expense in source.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows an example of the downlink RS pattern of existing LTE system；
Fig. 2 shows RS resource distribution according to an embodiment of the invention and the flow charts of CSI feedback；
Fig. 3 shows the figure of the first RS resource and the 2nd RS resource according to an embodiment of the invention in PRBP
Case；
Fig. 4 shows the 4X8 vertical polarized antenna battle array of base station side according to an embodiment of the invention to the port RS
Mapping graph；
Fig. 5 shows the structural block diagram according to an embodiment of the invention for the processing unit in UE；
Fig. 6 shows the structural block diagram according to an embodiment of the invention for the processing unit in base station；
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with attached drawing, it should be noted that do not rushing
In the case where prominent, the feature in embodiments herein and sub- embodiment can be arbitrarily combined with each other.
Embodiment 1
Embodiment 1 is the flow chart of RS resource distribution and CSI feedback, as shown in Fig. 2.In attached drawing 2, base station E1 is maintained
A cell be UE U2 serving cell.Step S210 is optional step.
For base station E1, in step slo, downlink reference signal is sent in the first RS resource and the 2nd RS resource；?
In step S11, sends downlink signaling and indicate the first PVI；In step s 12, uplink CSI is received.
For UE U2, in step S20, downlink reference signal is received in the first RS resource and the 2nd RS resource；In step
In rapid S21, receives downlink signaling and obtain the first PVI；In step S22, uplink CSI is sent.
In embodiment 1, the first RS resource includes N number of port RS.2nd RS resource includes the M port RS.First PVI index
Vector include M element.Each of the first RS resource port RS is all respectively by M antenna in target-subframe set
Unit group uses antenna virtualization schemes generation, and corresponding antenna virtualization vector is by the vector of the first PVI index.The N
It is greater than 1 positive integer, the M is greater than 1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.Institute
Stating uplink CSI includes at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI.If the first PMI exists,
The reference RS of first PMI is the first RS resource, and the first PMI of calculation assumption of the first CQI is also used by base station E1.If second
PMI exists, and the reference RS of the 2nd PMI is the 2nd RS resource, and the 2nd PMI of calculation assumption of the first CQI is also used by base station E1.Institute
Stating uplink RS is that traditional SRS either extends SRS, and the extension SRS, which refers to, appears in normal sub-frames (the i.e. non-special son of TDD
Frame) in the last one non-SC-FDMA (Single Carrier Frequency Division Multiple Access, it is single
Carrier wave frequency division multiple access) SRS on symbol, the RS sequence of the extension SRS and the pattern in SC-FDMA symbol reuse tradition
SRS scheme.
As the sub- embodiment 1 of embodiment 1, UE U2 is nearest in the first RS resource based on the received in step S210
M sub-frame sets on downlink reference signal and corresponding M PVI recover each port RS in the first RS resource
The channel information of corresponding M antenna element group.Wherein, the downlink signaling is physical layer signaling, and the F is 1.
As the sub- embodiment 2 of embodiment 1, the uplink CSI includes { the first PMI, uplink RS, the 2nd PMI, first
CQI}。
As the sub- embodiment 3 of embodiment 1, the uplink CSI includes { the first PMI, the 2nd PMI, the first CQI }.
As the sub- embodiment 4 of embodiment 1, the uplink CSI includes { the first PMI, uplink RS, the first CQI }.
Embodiment 2
Embodiment 2 illustrates the pattern of the first RS resource and the 2nd RS resource in PRBP in the present invention, such as 3 institute of attached drawing
Show, wherein the RE of number x mark corresponds to the index of the port RS, two RE in the adjacent same sub-carrier of time domain use OCC
(Orthogonal Covering Code, orthogonal covering codes).In attached drawing 3, the first RS resource and the 2nd RS resource are in subframe
Reuse respectively a CSI-RS in LTE configure corresponding the first RS resource of CSI-RS- include the port RS 1,2,3,4,5,6,7,
8 }, the 2nd RS resource includes the port RS { 9,10,11,12 }.The port RS correspond to a port CSI-RS in LTE when,
Frequently, code domain resource.
Embodiment 3
Embodiment 3 is the 4X8 vertical polarized antenna battle array of base station side configuration to the mapping graph of the port RS, as shown in Fig. 4.It is attached
In Fig. 4, a lattice indicates a physical antenna elements, the corresponding RS port index of the digital representation therein physical antenna
(there are two numbers to mean that an antenna element is mapped to 2 ports RS-two ports RS of transmission letter on an antenna element
Number).
As shown in Fig. 4,4 transmission antennas of same row are mapped to the same port RS by the way of antenna virtualization
(i.e. 4 transmission antennas send the same signal by antenna virtualization vector precoding respectively, form one in receiver side
Virtual-antenna)-corresponding the port RS { 1-8 }.Similar, 4 transmission antennas with a line are mapped by the way of antenna virtualization
To the same port RS-port correspondence RS { 9-12 }.
Base station sends downlink reference signal to UE in the first RS resource and the 2nd RS resource first；Then under base station is sent
Row signaling is to UE with the first PVI；Then UE sends uplink CSI to base station.
In embodiment 3, the first RS resource includes the port RS { 1-8 }, and the 2nd RS resource includes the port RS { 9-12 }.First
The vector w of PVI index4×1It is 4 rows 1 column.It for the port RS { 1 } is identified by number 1 in attached drawing 4 in target-subframe set
4 antenna elements use antenna virtualization schemes generation, and corresponding antenna virtualization vector is w4×1.For the port RS { 2-8 },
And generated by similar operation-corresponding antenna virtualization vector is also w4×1.The sub-frame set includes F subframe, institute
Stating F is positive integer.The uplink CSI includes { the first PMI, the 2nd PMI, the first CQI }.The first PMI of calculation assumption of first CQI
It is used with the 2nd PMI by base station.
As the sub- embodiment 1 of embodiment 3, the calculating of the first CQI with the following method:
The port RS { 1-8 } of the first RS resource of measurement obtains down channelRow 8 arranges, the 2nd RS resource of measurement
{ 9-12 } obtains down channel for the port RSRow 4 arranges, and r is UE receiving antenna number
Assume that base station is sent on the CSI reference resources of the first CQI by the method for precoding using the port RS { 9-12 }
PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) signal.If corresponding precoding
Matrix is the matrix of the 2nd PMI indexUE calculates the precoding channel on PDSCHEquivalent channel capacity
C1；If corresponding pre-coding matrix is the vector w of the first PVI index4×1, UE calculate PDSCH on precoding channelEquivalent channel capacity C2
Assume that base station is sent on the CSI reference resources of the first CQI by the method for precoding using the port RS { 1-8 }
PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) signal.Corresponding to pre-coding matrix is
The matrix of first PMI indexUE calculates the precoding channel on PDSCHEquivalent channel capacity C3
Assume that the first PMI and the 2nd PMI is used by base station, practical equivalent channel capacity is C1-C2+C3, according to the reality
Border equivalent channel capacity, which is tabled look-up, determines the first CQI
The calculating of above-mentioned equivalent channel capacity can using SINR (Signal Interference Noise Ratio,
Signal to Interference plus Noise Ratio), EESM (Exponential Effective SINR Mapping, the effective SINR mapping of index), RBIR
(Received Block mean mutual Information Ratio, block Average Mutual rate) } it is any one in criterion
Kind.
As the sub- embodiment 2 of embodiment 3, UE is based on the received in 4 sub-frame sets in the first RS resource
Downlink reference signal and corresponding 4 PVI (using matrix inversion operation) each of recover in the first RS resource the RS
The channel information of corresponding 4 antenna elements in port.The corresponding vector of 4 PVI is nonparallel each other.UE can be obtained
All descending channel information H of 32 physical antenna elementsr×32- r row 32 arranges.The calculating of first CQI is with the following method:
According to (base station both know about with UE) predefined method, UE utilizes the matrix of the first PMI indexWith second
The matrix of PMI indexReconstruct total pre-coding matrix W32×b, b is the precoding number of plies
According to precoding channel Hr×32·W32×bEquivalent channel capacity is calculated, and then tables look-up and determines the first CQI.
Embodiment 4
Embodiment 4 is the structural block diagram for the processing unit in UE, as shown in Fig. 5.In attached drawing 5, UE device 300 by
Receiving module 301, receiving module 302 and sending module 303 are constituted.Sending module 303 is optional module.
Receiving module 301 in the first RS resource for receiving downlink reference signal, and receiving module 302 is for receiving downlink
Signaling obtains the first PVI, and sending module 303 is for sending at least one of { the first PMI, the 2nd PMI, uplink RS } and the
One CQI.In the presence of sending module 303, receiving module 301 is also used to receive downlink reference signal in the 2nd RS resource
In embodiment 4, the first RS resource includes N number of port RS.2nd RS resource includes the M port RS.First PVI index
Vector include M element.Each of the first RS resource port RS is all respectively by M antenna in target-subframe set
Unit group uses antenna virtualization schemes generation, and corresponding antenna virtualization vector is by the vector of the first PVI index.The N
It is greater than 1 positive integer, the M is greater than 1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.Such as
The first PMI of fruit exist, the reference RS of the first PMI is the first RS resource, based on the first PMI by base station use it is assumed that the first CQI
It is calculated.If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the 2nd PMI of calculation assumption of the first CQI
It is used by base station.
As the sub- embodiment 1 of embodiment 4, the downlink signaling is rrc layer signaling.
As the sub- embodiment 2 of embodiment 4, the RS resource of the first PVI instruction is configured by high-level signaling.
Embodiment 5
Embodiment 5 is the structural block diagram for the processing unit in base station (eNB), as shown in Fig. 6.In attached drawing 6, eNB
Device 400 is made of sending module 401, sending module 402 and receiving module 403.Receiving module 403 is optional module.
Sending module 401 in the first RS resource for sending downlink reference signal, and sending module 402 is for sending downlink
Signaling indicates the first PVI, and receiving module 403 is for receiving at least one of { the first PMI, the 2nd PMI, uplink RS } and the
One CQI.In the presence of receiving module 403, sending module 401 is also used to send downlink reference signal in the 2nd RS resource.
In embodiment 5, the first RS resource includes N number of port RS.2nd RS resource includes the M port RS.First PVI index
Vector include M element.Each of the first RS resource port RS is all respectively by M antenna in target-subframe set
Unit group uses antenna virtualization schemes generation, and corresponding antenna virtualization vector is by the vector of the first PVI index.The N
It is greater than 1 positive integer, the M is greater than 1 positive integer.The sub-frame set includes F subframe, and the F is positive integer.Such as
The first PMI of fruit exists, and the reference RS of the first PMI is the first RS resource, based on the first PMI by the base station use it is assumed that the
One CQI is calculated.If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the calculation assumption of the first CQI the
Two PMI are used by the base station.
As the sub- embodiment 1 of embodiment 5, the downlink signaling is the physical layer signaling sent for dispatching downlink, institute
Stating F is 1.
As the sub- embodiment 2 of embodiment 5, the first PVI instruction RS resource be it is predefined, that is, do not need proprietary signaling
Display configuration.As described predefined one embodiment, the RS resource of the first PVI instruction is the first RS resource and the 2nd RS money
The RS resource of corresponding (after virtualization) vertical direction antenna element in source.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be referred to by program
Related hardware is enabled to complete, described program can store in computer readable storage medium, such as read-only memory, hard disk or light
Disk etc..Optionally, one or more integrated circuit can be used also to realize in all or part of the steps of above-described embodiment.Phase
It answers, each modular unit in above-described embodiment, can be realized using example, in hardware, it can also be by the form of software function module
It realizes, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification made, equivalent replacement, improve etc., it should be included in protection of the invention
Within the scope of.
Claims (11)
1. a kind of method in UE, wherein include the following steps:
Step A. receives downlink reference signal in the first RS (reference signal) resource；
Step B. receives downlink signaling and obtains the first PVI (precoding vector index)；
Wherein, the first RS resource includes N number of port RS；The vector of first PVI index includes M element；In first RS resource
Each port RS is to use antenna virtualization schemes generation by M antenna element group respectively in target-subframe set, right
The antenna virtualization vector answered is by the vector of the first PVI index；The N is greater than 1 positive integer, and the M is being greater than 1 just
Integer；The sub-frame set includes F subframe, and the F is positive integer.
2. the method according to claim 1, wherein the step A further include:
Step A1. receives downlink reference signal in the 2nd RS resource；
The method also includes:
Step C. sends at least one of { the first PMI (pre-coding matrix instruction), the 2nd PMI, uplink RS } and first
CQI (channel quality instruction)；
Wherein, the 2nd RS resource includes the M port RS；If the first PMI exists, the reference RS of the first PMI is the first RS resource,
Based on the first PMI by base station use it is assumed that the first CQI is calculated；If the 2nd PMI exists, the reference RS of the 2nd PMI is
The 2nd PMI of calculation assumption of 2nd RS resource, the first CQI is used by base station.
3. method according to claim 1 or 2, which is characterized in that the step B further include:
The step B1. downlink reference signal in the K in the first RS resource sub-frame sets and corresponding based on the received
K PVI recovers the channel information of the corresponding M antenna element group in each port RS；The K is no less than the just whole of M
Number.
4. method according to claim 1 or 2, which is characterized in that the first RS resource and the 2nd RS resource are in a subframe
Interior pattern is the corresponding CSI-RS of one group of CSI-RS (channel status instruction reference signal) configuration respectively in a subframe
Pattern.
5. a kind of method in base station, wherein include the following steps:
Step A. sends downlink reference signal in the first RS resource
Step B. sends downlink signaling and indicates the first PVI；
Wherein, the first RS resource includes N number of port RS；The vector of first PVI index includes M element；In first RS resource
Each port RS is to use antenna virtualization schemes generation by M antenna element group respectively in target-subframe set, right
The antenna virtualization vector answered is by the vector of the first PVI index；The N is greater than 1 positive integer, and the M is being greater than 1 just
Integer；The sub-frame set includes F subframe, and the F is positive integer.
6. according to the method described in claim 5, it is characterized in that, the step A further include:
Step A1. sends downlink reference signal in the 2nd RS resource；
The method also includes:
Step C. receives at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI；
Wherein, the 2nd RS resource includes the M port RS；If the first PMI exists, the reference RS of the first PMI is the first RS resource,
Based on the first PMI by the base station use it is assumed that the first CQI is calculated；If the 2nd PMI exists, the reference of the 2nd PMI
RS is the 2nd RS resource, and the 2nd PMI of calculation assumption of the first CQI is used by the base station.
7. method according to claim 5 or 6, which is characterized in that the first RS resource and the 2nd RS resource are in a subframe
Interior pattern is pattern of the corresponding CSI-RS of one group of CSI-RS configuration in a subframe respectively.
8. a kind of user equipment, which is characterized in that the equipment includes:
First module: for receiving downlink reference signal in the first RS resource；
Second module: the first PVI is obtained for receiving downlink signaling；
Wherein, the first RS resource includes N number of port RS；The vector of first PVI index includes M element；In first RS resource
Each port RS is to use antenna virtualization schemes generation by M antenna element group respectively in target-subframe set, right
The antenna virtualization vector answered is by the vector of the first PVI index；The N is greater than 1 positive integer, and the M is being greater than 1 just
Integer；The sub-frame set includes F subframe, and the F is positive integer.
9. equipment according to claim 8, which is characterized in that the equipment further include:
Third module: for sending at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI；
Wherein, the first module is also used to receive downlink reference signal in the 2nd RS resource；2nd RS resource includes the M end RS
Mouthful；If the first PMI exists, the reference RS of the first PMI is the first RS resource, based on the first PMI by base station use it is assumed that the
One CQI is calculated；If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the calculation assumption of the first CQI the
Two PMI are used by base station.
10. a kind of base station equipment, which is characterized in that the equipment includes:
First module: for sending downlink reference signal in the first RS resource；
Second module: the first PVI is indicated for sending downlink signaling；
Wherein, the first RS resource includes N number of port RS；The vector of first PVI index includes M element；In first RS resource
Each port RS is to use antenna virtualization schemes generation by M antenna element group respectively in target-subframe set, right
The antenna virtualization vector answered is by the vector of the first PVI index；The N is greater than 1 positive integer, and the M is being greater than 1 just
Integer；The sub-frame set includes F subframe, and the F is positive integer.
11. equipment according to claim 10, which is characterized in that the equipment further include:
Third module: for receiving at least one of { the first PMI, the 2nd PMI, uplink RS } and the first CQI；
Wherein, the first module is also used to send downlink reference signal in the 2nd RS resource；2nd RS resource includes the M end RS
Mouthful；If the first PMI exists, the reference RS of the first PMI is the first RS resource, the vacation used based on the first PMI by the base station
If the first CQI is calculated；If the 2nd PMI exists, the reference RS of the 2nd PMI is the 2nd RS resource, the calculating of the first CQI
It is assumed that the 2nd PMI is used by the base station.
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| CN111342868B (en) * | 2016-06-22 | 2021-06-25 | 上海朗帛通信技术有限公司 | Large-scale MIMO transmission method and device |
| CN111769854A (en) * | 2016-06-29 | 2020-10-13 | 上海朗帛通信技术有限公司 | Method and device in wireless communication |
| CN112615657A (en) * | 2016-07-25 | 2021-04-06 | 上海朗帛通信技术有限公司 | Method and device in wireless transmission |
| CN110635835B (en) * | 2016-11-01 | 2022-11-25 | 极光技术咨询有限责任公司 | Method and device for UE (user equipment) and base station of multi-antenna system |
| CN111479327A (en) * | 2016-11-24 | 2020-07-31 | 上海朗帛通信技术有限公司 | Method and device for UE (user equipment) and base station of multi-antenna system |
| CN108155923B (en) * | 2016-12-03 | 2020-05-22 | 上海朗帛通信技术有限公司 | Method and device used in UE (user equipment) and base station for multi-antenna transmission |
| CN108737041B (en) * | 2017-04-18 | 2020-05-26 | 上海朗帛通信技术有限公司 | Method and device for user equipment and base station for multi-antenna transmission |
| CN112491453B (en) * | 2018-06-29 | 2022-06-21 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
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