CN103368697B - The feedback method and device of the PCI to cooperate between CQI and/or node - Google Patents
The feedback method and device of the PCI to cooperate between CQI and/or node Download PDFInfo
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- CN103368697B CN103368697B CN201210084367.7A CN201210084367A CN103368697B CN 103368697 B CN103368697 B CN 103368697B CN 201210084367 A CN201210084367 A CN 201210084367A CN 103368697 B CN103368697 B CN 103368697B
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Abstract
The invention discloses the feedback method and device of the PCI between a kind of cooperation CQI and/or node, this method includes：UE receives the CSI report of base station side configuration, wherein CSI report is for feeding back cooperation CQI and/or phase correction information PCI, and the corresponding feedback model of CSI report uses and CQI corresponding bit instruction cooperation CQI and using the PCI between bit corresponding with PMI instruction node；UE feeds back cooperation CQI and/or PCI using feedback model.The present invention can improve flexibility, improve performance, avoid the wasting of resources.
Description
Technical field
The present invention relates to the communications fields, in particular to the feedback method of the PCI between cooperation CQI and/or node a kind of
And device.
Background technology
In order to improve by the data throughout of the larger edge customer of inter-cell interference in Cellular Networks, to (Long Term
Evolution, referred to as LTE) propose in systematic research cooperative multi-point technology (Cooperate Multiple Point,
Referred to as CoMP) technology.CoMP technologies contain joint transmission (Joint Transmission, referred to as JT), i.e., multiple hairs
Node (TP) is sent to cooperate by spatial domain, it is same to improve signal power for user equipment (UE) transmission data on identical running time-frequency resource
When reduce interference, promote the reception Signal to Interference plus Noise Ratio (SINR) of UE, realize the promotion of community marginal user performance.Other CoMP associations
Further include as method：Cooperative beam formation/cooperative scheduling (Cooperate Beamforming/Cooperate
Scheduling, CB/CS), dynamic node selects (Dynamic Point Selection, DPS), and dynamic node is silent
A few class technologies such as (Dynamic Point Blanking, DPB).Different from JT, the these types of each subframe of method only has
One TP sends signal to UE, and other nodes may not send signal to avoid the interference to UE, can also cause to interfere
In the case of less signal is sent to other UE.
, can be there are one main TP in the TP of these participation cooperations, other TP that one or more participates in cooperation are known as cooperating
TP.The sides UE usually require to measure channel state information (Channel State Information, the abbreviation of each cooperation TP respectively
For CSI), including channel coefficient matrix, Signal to Interference plus Noise Ratio (SINR), channel rank information etc., and with pre-coding matrix instruction
(Precoding Matric Indicator, referred to as PMI), channel quality indicate (Channel Quality
Indicator, referred to as CQI), order instruction (Rank Indicator, RI) etc. or other instructions that may be increased newly it is formal
Report, hereinafter referred to as CSI report.The TP of UE in need report CSI constitute a report set.
In order to realize that the signal coherence of JT merges (coherent combining) SINR, UE are received further to promote UE
The phasing that can also be fed back to base station side between cooperative node indicates (Phase Correct Indicator, PCI), or
Referred to as inter-CSI-RS resource phase information.Phase is a node relative to other one between node
The phase difference of the interchannel to UE of a node, base station side carry out phasing using this phase information and realize multiple cooperation TP
The relevant merging of signal so that receiving side signal obtains maximum reception Signal to Interference plus Noise Ratio (SINR), such as counts by the following method
Calculate the phase correction factor between UE and TP1 and TP2 channel matrixes：
Wherein, θ is phase information, phase correction factor ejθ={ 1, -1, i,-i }, [1 ejθ]TCorresponding in LTE versions 10
2 transmitting antenna code books in rank be 1 code book, H1, H2It is the channel matrix of two cooperative node TP1 and TP2 to UE respectively,
W1, W2It is the corresponding pre-encoding codewords of TP1 and TP2,It is the variance of interference plus noise.
The accuracy of CQI also determines the receptivity of UE.Used CQI is different under different CoMP methods, this
In be referred to as cooperation CQI, the polymerization CQI used when may include JT (aggregated CQI), i.e. UE assume certain several TP into
Row JT and the CQI after the cooperation that calculates；Or under the list TP transmission modes such as DPS/DPB/CB/CS, disturbance is based on it is assumed that i.e.
Assuming that certain cooperation TP do not send any signal in the resource that UE is used or send signal to other UE but will not cause big
Interference, and calculate CQI.
Realize CoMP need a problem solving be how to feed back TP between phase correction information and/or cooperation CQI information.
For JT, following two methods exist in the prior art：
Method one is polymerization PMI feedbacks, that is, configures the channel state information reference signals (CSI-RS) of a set of multiport, should
The port of CSI-RS corresponds to different TP, and UE measures the CSI-RS and feeds back corresponding PMI/CQI/RI etc., polymerize in PMI then
Contain phase information between certain TP.But polymerization PMI feedback flexibilities and performance are all worse than individual phase correction information
Feedback.
For method second is that extracting a corresponding antenna from each cooperation TP, the antenna of each TP corresponds to an end CSI-RS
Mouthful, UE measures the CSI-RS of this two-port and feeds back corresponding PMI/CQI/RI, and PMI therein is then corresponded between two TP
Phase information.But if this method will accomplish transparent to UE, CQI is exactly a useless information and causes feedback resources
Waste, it is opaque to UE if polymerizeing CQI information in CQI, and the CSI-RS of corresponding configuration is just at unnecessary expense.
Invention content
For phase correction information and/or cooperation CQI information flexibility are poor, poor performance, make between feedback TP in the related technology
The present invention is proposed at the problems such as the wasting of resources, for this purpose, the main purpose of the present invention is to provide a kind of cooperation CQI and/or sections
The feedback method and device of PCI between point, to solve the above problems.
According to an aspect of the invention, there is provided a kind of feedback of the phase correction information between cooperation CQI and/or node
Method, including：UE builds CSI report according to the configuration of base station side, and wherein CSI report is for feeding back cooperation CQI and/or phase school
Positive information PCI, the corresponding feedback model of CSI report is using bit corresponding with CQI instruction cooperation CQI and uses and PMI pairs
PCI between the bit instruction node answered；UE feeds back cooperation CQI and/or PCI using feedback model.
Preferably, before UE is according to the configuration structure CSI report of base station side, further include：UE is according to from base station side
High-level signaling either according to base station side it is pre-defined to feedback model using the corresponding feedback model of 2 antenna port systems or
It is configured using the corresponding feedback model of 4 antenna port systems.
Preferably, UE is according to the pre-defined corresponding each anti-using 2 antenna port systems to feedback model of base station side
Feedback pattern is configured using the corresponding each feedback model of 4 antenna port systems, including：UE works as the report collection of base station side
When the quantity of node in conjunction is 2, configuration uses the corresponding feedback model of 2 antenna port systems, when report set interior joint
When quantity is 3, configuration uses the corresponding feedback model of 4 antenna port systems.
Preferably, indicate that the PCI between node includes using bit corresponding with PMI：When the quantity of bit is 1, from collection
The phase correction factor of selection PCI in { 1, -1 }, { 1, i } or { 1,-i } is closed, or does not use phasing；When the number of bit
When amount is 2, the selected phase correction factor from set { 1, -1, i,-i }；When the quantity of bit is 4, from set 1, and -1, i, -
I } two phase correction factors of middle selection, wherein each phase correction factor is indicated with 2 bits.
Preferably, before UE is according to the configuration structure CSI report of base station side, further include：UE determines RI；UE according to RI with
The correspondence of feedback model determines the corresponding feedback models of RI, wherein correspondence by high-level signaling from base station side or
Person configures according to the pre-defined of base station side.
Preferably, UE determines that RI includes following one：UE determines RI according to the RI of JT；UE is indicated according to base station side or base
Stand side according to predefined method give fixation RI determine RI.
Preferably, UE determines that the corresponding feedback models of RI include according to RI and the correspondence of feedback model：When RI is 1
When, in non-periodic feedback, feedback model feeds back subband PCI and broadband cooperation CQI；When RI is 2, in non-periodic feedback,
Feedback model feeds back broadband and the subband cooperation CQI and/or broadband PCI of each code word, or feedback broadband and best M subband
PCI and cooperation CQI；When RI is 2, in periodic feedback, feedback model feeds back broadband or the subband cooperation CQI of UE selections
And/or broadband PCI.
Preferably, before determining the corresponding feedback models of RI according to RI and the correspondence of feedback model in UE, further include：
Base station side configures the report of one or more sets CSI feedbacks, the wherein often set CSI feedback in the report of one or more sets CSI feedbacks to UE
Report that corresponding CoMP cooperation modes are different.
Preferably, the CoMP cooperation modes corresponding to cooperation CQI during often set CSI feedback is reported, are passed through by base station side
Dynamic signaling is semi-static signaling or pre-defined by base station side.
Preferably, base station side passes through dynamic or the semi-static CoMP cooperation parts signaled corresponding to U E report cooperations CQI
Formula includes：Send whether the cooperative node except signal node has interference when combination of nodes or DPS/DPB/CB/CS when JT.
Preferably, base station side one of in the following manner notice U E report cooperation CQI institutes in dynamic or semi-static signaling
Corresponding CoMP cooperation modes, which include following one：Using one or more bits, wherein each bit indicates DPS/
DPB/CB/CS transmission modes, which issue, to be sent the cooperative node except signal node whether to have interference and respectively corresponds to a CSI report
It accuses；Using one or more bit sequences, wherein each bit sequence indicates that a kind of TP of JT is combined and respectively corresponded to one
CSI report.
According to another aspect of the present invention, a kind of the anti-of the phase correction information between CQI and/or node that cooperate is provided
Device is presented, which can be applied to UE, including：Module is built, for building CSI report according to the configuration of base station side, wherein
CSI report is for feeding back cooperation CQI and/or phase correction information PCI, and the corresponding feedback model of CSI report is using corresponding with CQI
Bit instruction cooperation CQI and using bit corresponding with PMI instruction node between PCI；Feedback module, for using feedback
Pattern feeds back cooperation CQI and/or PCI.
Through the invention, using new feedback model, the feedback model is using bit corresponding with CQI instruction cooperation CQI
And using the PCI between bit corresponding with PMI instruction node, so as to improve flexibility, improve performance, avoid resource unrestrained
Take.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of CoMP JT systems according to the ... of the embodiment of the present invention；
Fig. 2 is that reference signal maps schematic diagram on a RB according to the ... of the embodiment of the present invention；
Fig. 3 is the flow chart of the feedback method of the PCI between cooperation CQI and/or node according to the ... of the embodiment of the present invention；
Fig. 4 is PCI according to the ... of the embodiment of the present invention and polymerization CQI feedback overall procedure；
Fig. 5 is the feedback parameter of base station side extraction JT according to the ... of the embodiment of the present invention and carries out the flow of JT transmissions；
Fig. 6 is the structure diagram of the feedback device of the PCI between cooperation CQI and/or node according to the ... of the embodiment of the present invention.
Specific implementation mode
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application can be combined with each other.
Duplicate data processing method in following embodiment can be applied on the server, the server can be exclusively used in into
The processing of row duplicate data, naturally it is also possible to be applied on one group of server.Or it can also be used as a mould in server
Block and the server for executing other functions are public.
The present invention can be realized based on a CoMP JT system.Fig. 1 is CoMP JT according to the ... of the embodiment of the present invention systems
The schematic diagram of system, Fig. 2 are that reference signal maps schematic diagram, as shown in Figure 1 and Figure 2,3 on a RB according to the ... of the embodiment of the present invention
A TP constitutes a cooperation set of UE, in cooperation set can 2 TP cooperate, can also 3 TP cooperate.
TP1, TP2, TP3 to UE channel be respectively H1, H2, H3.Using TP1 as reference mode, the phase difference difference of H2, H3 between H1
For θ12, θ13.Wherein, θ12And θ13It can optimally choose in several ways, for example,
It maximizes signal and merges reception power：
H1, H2It is the channel matrix of two cooperative node TP1 and TP2 to UE, W respectively1, W2It is TP1 and TP2 corresponding pre-
Coding codeword.
Or assume least mean-square error MMSE receivers, it maximizes and receives Signal to Interference plus Noise Ratio SINR：
Phase correction factor e in above formulajθ={ 1, -1, i,-i } corresponds respectively to θ={ 0, pi/2, π, 3 pi/2s }.
The TP that signal is sent after using the phasing of optimum choice realizes the relevant merging of signal in the sides UE.
Based on above-mentioned CoMP JT systems, the present invention provides the phase correction informations between a kind of cooperation CQI and/or node
Feedback method.Fig. 3 is the feedback method of the phase correction information between cooperation CQI and/or node according to the ... of the embodiment of the present invention
Flow chart, as shown in figure 3, include following step S302 to step S304.
Step S302, UE according to base station side configuration build CSI report, wherein CSI report for feed back cooperation CQI and/
Or phase correction information PCI, the corresponding feedback model of CSI report is using bit corresponding with CQI instruction cooperation CQI and uses
PCI between bit instruction node corresponding with PMI.
Step S304, UE feed back cooperation CQI and/or PCI using feedback model.
In the related technology, it feeds back phase correction information and/or cooperation CQI information there are flexibilities poor, poor performance between TP, make
The problems such as at the wasting of resources.In the embodiment of the present invention, using new feedback model, which uses ratio corresponding with CQI
It refers in particular to show cooperation CQI and the PCI between node is indicated using bit corresponding with PMI, so as to improve flexibility, raising property
Can, it avoid the wasting of resources.
Preferably, before UE is according to the configuration structure CSI report of base station side, further include：UE is according to from base station side
High-level signaling either according to base station side it is pre-defined to feedback model using the corresponding feedback model of 2 antenna port systems or
It is configured using the corresponding feedback model of 4 antenna port systems.
Preferably, UE is according to the pre-defined corresponding each anti-using 2 antenna port systems to feedback model of base station side
Feedback pattern is configured using the corresponding each feedback model of 4 antenna port systems, including：UE works as the report collection of base station side
When the quantity of node in conjunction is 2, configuration uses the corresponding feedback model of 2 antenna port systems, when report set interior joint
When quantity is 3, configuration uses the corresponding feedback model of 4 antenna port systems.
Preferably, indicate that the PCI between node includes using bit corresponding with PMI：When the quantity of bit is 1, from collection
The phase correction factor of selection PCI in { 1, -1 }, { 1, i } or { 1,-i } is closed, or does not use phasing；When the number of bit
When amount is 2, the selected phase correction factor from set { 1, -1, i,-i }；When the quantity of bit is 4, from set 1, and -1, i, -
I } two phase correction factors of middle selection, wherein each phase correction factor is indicated with 2 bits.
Preferably, before UE is according to the configuration structure CSI report of base station side, further include：UE determines RI；UE according to RI with
The correspondence of feedback model determines the corresponding feedback models of RI, wherein correspondence by high-level signaling from base station side or
Person configures according to the pre-defined of base station side.
Preferably, UE determines that RI includes following one：UE determines RI according to the RI of JT；UE is indicated according to base station side or base
Stand side according to predefined method give fixation RI determine RI.
Preferably, UE determines that the corresponding feedback models of RI include according to RI and the correspondence of feedback model：When RI is 1
When, in non-periodic feedback, feedback model feeds back subband PCI and broadband cooperation CQI；When RI is 2, in non-periodic feedback,
Feedback model feeds back broadband and the subband cooperation CQI and/or broadband PCI of each code word, or feedback broadband and best M subband
PCI and cooperation CQI；When RI is 2, in periodic feedback, feedback model feeds back broadband or the subband cooperation CQI of UE selections
And/or broadband PCI.
Preferably, before determining the corresponding feedback models of RI according to RI and the correspondence of feedback model in UE, further include：
Base station side configures the report of one or more sets CSI feedbacks, the wherein often set CSI feedback in the report of one or more sets CSI feedbacks to UE
Report that corresponding CoMP cooperation modes are different.
Preferably, the CoMP cooperation modes corresponding to cooperation CQI during often set CSI feedback is reported, are passed through by base station side
Dynamic signaling is semi-static signaling or pre-defined by base station side.
Preferably, base station side passes through dynamic or the semi-static CoM P cooperations signaled corresponding to U E report cooperations CQI
Mode includes：Sent when combination of nodes or DPS/DPB/CB/CS when JT the cooperative node except signal node whether have it is dry
It disturbs.
Preferably, base station side one of in the following manner notice U E report cooperation CQI institutes in dynamic or semi-static signaling
Corresponding CoMP cooperation modes, which include following one：Using one or more bits, wherein each bit indicates DPS/
DPB/CB/CS transmission modes, which issue, to be sent the cooperative node except signal node whether to have interference and respectively corresponds to a CSI report
It accuses；Using one or more bit sequences, wherein each bit sequence indicates that a kind of TP of JT is combined and respectively corresponded to one
CSI report.
The realization process of the embodiment of the present invention is described in detail below in conjunction with embodiment.
Embodiment 1
Illustrate the implementation process of totality of the invention in the present embodiment.In the system shown in figure 1, TP1, TP2 and TP3 combine
Signal is sent to UE.Wherein TP1 is host node or reference mode, and TP2 and TP3 are cooperative node.
PCI and polymerization CQI feedback overall procedure are as shown in Figure 4.
Step S402：Base station side notifies UE in report set in addition to reporting TP1, TP2 and TP3 in high-rise RRC signaling
Independent CSI report outside, it is also necessary to include two CSI reports, separately include TP1 with cooperate PCI between TP1 and TP2 and
With mutually it will be assumed that polymerization CQI when two TP carry out JT.
Step S404：CSI report when base station side is RI=2 configures feedback model；And it can be matched by base station side when RI=1
It sets, feedback model 1-2 can also be defined as, that is, feed back subband PCI.
Step S406：UE lateral roots measure according to feedback model and determine the RI/ needed for the RI/PMI/CQI and JT of each TP
PCI/ polymerize CQI.
Step S408：The lateral base station sides of UE are fed back outside the CSI report of each TP, according to RI, are corresponded to using 2 antenna port systems
Feedback model feed back corresponding PCI/ and polymerize CQI.
Step S410：When JT, base station side determines the phase correction factor of each cooperation TP according to the PCI reported and and uses poly-
Close the corresponding MCS joint transmissions of CQI.
The feedback parameter of base station side extraction JT and the flow for carrying out JT transmissions are as shown in Figure 5.
Step S502：Base station side receives CSI report, and determines used feedback model according to RI.
Step S504：Base station side is with determining the content in report according to feedback model.
Step S506：Phase correction factor is determined from phasing code book according to PCI.
Step S508：Respective phase correction factor is used to each cooperation TP when JT, and is passed using the corresponding MCS of polymerization CQI
It is defeated.
Embodiment 2
Concrete example illustrates to measure and constitutes PCI and polymerize the process of CQI report in the present embodiment.
In Fig. 1, TP1 and TP2 cooperations are that UE carries out joint transmission, and TP3 is not that strong jamming node is not involved in cooperation.UE distinguishes
The channel coefficient matrix H1 and H2 of TP1 and TP2 to UE are measured, and two respective PMI/CQI/RI of TP are selected independently, here
Assuming that RI is 1.
UE first measures the corresponding CSI-RS of TP1 and TP2 in Fig. 1 and obtains CSI report 1 and CSI report 2 respectively.
The phase correction factor that UE passes through following formula selection optimization：
Wherein θ is phase information, phase correction factor[1 ejθ]TCorresponding to 2 in LTE versions 10
The code book that rank is 1 in transmitting antenna code book, H1, H2It is the channel matrix of two cooperative node TP1 and TP2 to UE, W respectively1,
W2It is the corresponding subband pre-encoding codewords of TP1 and TP2.
CSI report 3 is configured for feedback phase control information and polymerization CQI for UE.It uses LTE R10 (agreement 36.212)
In the corresponding feedback model 1-2 of 2 antenna ports come carry 2bitPCI and polymerization CQI, i.e., the corresponding contents of rank=1 in table 1.
Table 1Field and Bit width mapping tables one
Table 1, CSI report 3 use the corresponding feedback model 1-2 of 2 antenna port systems
PCI and polymerization CQI are fed back, N is sub-band number
PCI occupies 2bit, the value from set { 1, -1, i,-i } when rank=1 in table, and 1bit is occupied when Rank=2,
The value from set { 1, -1 }.
Because of RI=1 in this example, corresponding PCI indexes are indicated with 2 bits, are indicated from 2 hairs in LTE versions 10
Penetrate [1 e that the code book that rank is 1 in antenna codebook selectsjθ]T, wherein corresponding to main TP, the 2nd element to 1 element of flow control
Phase correction factor for cooperation TP relative to main TP.
In addition, it is assumed that base station side TP1 and TP2 have used selected phase correction factor to carry out joint transmission respectively, then
It is as follows that corresponding Signal to Interference plus Noise Ratio SINR can be calculated：
After calculating to the equivalent SINR in whole bandwidth, the CQI by searching for selection optimization keep throughput of system maximum and
The bit error rate is less than 0.1, and the CQI selected is broadband polymerization CQI.As RI=1, only there are one the polymerization CQI of code word, with 4 ratios
It refers in particular to show.
Base station side is sent in joint transmission using the corresponding modulation coding scheme MCS of polymerization CQI.
Embodiment 3
It is different from the RI=2 when part of embodiment 2 is JT in this example, base station side is the PCI needed for TP1 cooperates with TP2
With one feedback report of aggregation configuration, carried out using the corresponding pattern 3-1 of 2 antenna ports in LTE R10 (agreement 36.212) anti-
Present broadband and the subband polymerization CQI of broadband PCI and two code words.
Table 2Field and Bit width mapping tables two
Table 3 uses the corresponding feedback model 3-1 of 2 antenna port systems
PCI and polymerization CQI are fed back, N is sub-band number
Embodiment 4
It is different from the RI=2 when part of embodiment 2 is JT in this example, base station side is the PCI needed for TP1 cooperates with TP2
With one feedback report of aggregation configuration, carried out using the corresponding pattern 2-2 of 2 antenna ports in LTE R10 (agreement 36.212) anti-
Present broadband and the subband polymerization CQI of broadband PCI and two code words.
Table 3Field and Bit width mapping tables three
Table 3 is fed back using the corresponding feedback model 2-2 of 2 antenna port systems
The polymerization CQI, L of first code word are the bit number for indicating subband position
Wherein in phasing index, the PCI of two same number of bits is contained, one is broadband, and one is best M
A subband.
Embodiment 5
Part in this example different from embodiment 2 is that cooperation TP numbers are 3, i.e. it is UE that TP1, TP2 and TP3, which combine, in Fig. 1
It is transmitted.Can include at this time TP2 and TP3 relative to TP1 with the corresponding feedback model 1-2 of a 4 antenna port systems
Phase correction factor instruction and polymerization CQI when 3 TP joint transmissions, as shown in table 4.
Table 4Field and Bit width mapping tables four
Table 4 uses the corresponding feedback model 1-2 of 4 antenna port systems
PCI and polymerization CQI are fed back, N is sub-band number
Phase correction factor indicates that each subband has a 4bit in table, and wherein 2 bits be used to indicate the phasing of TP2 because
Son, in addition 2bit be used to indicate TP3's.Each phase correction factor value from set { 1, -1, i,-i }.
Embodiment 6
In the present embodiment, there are 3 cooperation TP to participate in JT, TP1 is reference mode in Fig. 1, and TP2 and TP3 are cooperative node.Base
Side configuration two stand for feeding back the CSI reports that TP1 and TP2 cooperates and TP1 and TP3 cooperates.One of them is 4 antenna ports
Corresponding pattern 3-1.Another cooperation mode assumes that TP1 and TP2 carries out JT, and configures a pattern 3-0 thus for feeding back
It polymerize CQI.Base station side indicates the combination of cooperation TP by high-level signaling with dibit, for example, 00 3 TP of expression are sent,
01 indicates that TP1 and TP2 is sent, and 10 indicate that TP1 and TP3 is sent, and 11 indicate that TP2 and TP3 is sent.
Embodiment 7
In the present embodiment, it is that UE sends signal to have TP1 and TP2 cooperations.In Fig. 1, only TP1 is that UE sends signal.
On the running time-frequency resource that UE is used, TP2 can there are two types of modes to cooperate in these resources.A kind of mode is that TP2 does not send and appoints
For what signal to avoid the interference to UE, another way is for a separate UE and another small UE to be interfered to send signal.For
This UE needs to report the CQI assumed based on both cooperations.In a set of CSI report CSI1 of feedback, CQI assumes that interference comes from
In addition all cells in addition to cell where TP1 report also include that TP1 sends the PMI and RI that signal uses for UE, CSI1's is anti-
Feedback pattern is 3-1, i.e. broadband PMI/CQI and subband CQI；In another set of CSI report CSI2, CQI assume interference from except TP1 and
All cells except cell where TP2 do not feed back PMI, and the feedback model of CSI2 is 3-0.Base station side be UE configure CSI1 and
The feedback parameter of two sets of reports of CSI2, and indicate respectively which kind of CQI is fed back in which report.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is executed in computer system, although also, logical order is shown in flow charts, and it in some cases, can be with not
The sequence being same as herein executes shown or described step.
An embodiment of the present invention provides a kind of feedback device of the phase correction information between cooperation CQI and/or node, the associations
The feedback device for making the phase correction information between CQI and/or node can be used to implement between above-mentioned cooperation CQI and/or node
The feedback method of phase correction information.Fig. 6 is the phasing letter between cooperation CQI and/or node according to the ... of the embodiment of the present invention
The structure diagram of the feedback device of breath, as shown in fig. 6, including structure module 62 and feedback module 64.Its structure is carried out below
Detailed description.
Module 62 is built, for building CSI report according to the configuration of base station side, wherein CSI report is for feeding back cooperation CQI
And/or phase correction information PCI, the corresponding feedback model of CSI report using bit corresponding with CQI instruction cooperation CQI and
PCI between node is indicated using bit corresponding with PMI；Feedback module 64 is connected to structure module 62, for using structure mould
The feedback model that block 62 is built feeds back cooperation CQI and/or PCI.
It should be noted that the feedback of the phase correction information to cooperate between CQI and/or node described in device embodiment
Device corresponds to above-mentioned embodiment of the method, and concrete implementation process had carried out detailed description in embodiment of the method,
Details are not described herein.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Be performed by computing device in the storage device, either they are fabricated to each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of feedback method of the phase correction information between cooperation CQI and/or node, it is characterised in that including：
User equipment (UE) according to base station side configuration build CSI report, wherein the CSI report for feed back cooperation CQI and/or
Phase correction information PCI, the corresponding feedback model of the CSI report indicate the cooperation CQI simultaneously using bit corresponding with CQI
And using the PCI between bit corresponding with PMI instruction node；
The UE feeds back the cooperation CQI and/or the PCI using the feedback model；Wherein, using with PMI pairs
The bit answered indicates that the PCI between node includes：
When the quantity of the bit is 1, from the phase school of the selection PCI in set { 1, -1 }, { 1, i } or { 1,-i }
Positive divisor, or do not use phasing；
When the quantity of the bit is 2, from the selection phase correction factor in set { 1, -1, i,-i }；
When the quantity of the bit is 4, from two phase correction factors are selected in set { 1, -1, i,-i }, wherein often
A phase correction factor is indicated with 2 bits.
2. according to the method described in claim 1, it is characterized in that, UE according to base station side configuration structure CSI report before,
Further include：The UE is according to the high-level signaling from base station side or pre-defining to the feedback mould according to the base station side
Formula is configured using the corresponding feedback model of 2 antenna port systems or using the corresponding feedback model of 4 antenna port systems.
3. according to the method described in claim 2, it is characterized in that, the UE is according to the pre-defined to described of the base station side
Feedback model is corresponding each anti-using the corresponding each feedback model of 2 antenna port systems or using 4 antenna port systems
Feedback pattern is configured, including：For the UE when the quantity of the node in the report set of the base station side is 2, configuration uses 2
The corresponding feedback model of antenna port system, when the quantity of the report set interior joint is 3, configuration uses 4 antenna ports
The corresponding feedback model of system.
4. according to the method described in claim 1, it is characterized in that, UE according to base station side configuration structure CSI report before,
Further include：
The UE determines order instruction RI；
The UE determines the corresponding feedbacks of the order instruction RI according to order instruction RI and the correspondence of the feedback model
Pattern, wherein the correspondence is by high-level signaling from base station side or according to the pre-defined progress of the base station side
Configuration.
5. according to the method described in claim 4, it is characterized in that, the UE determines that order instruction RI includes following one：
The UE determines the order instruction RI according to the order instruction RI of joint transmission JT；
The UE is indicated according to base station side or the base station side determines institute according to the fixation order instruction RI that predefined method gives
State order instruction RI.
6. according to the method described in claim 4, it is characterized in that, the UE is according to the order instruction RI and the feedback model
Correspondence determine that the corresponding feedback models of the order instruction RI include：
When the order instruction RI is 1, in non-periodic feedback, the feedback model feedback subband PCI and broadband cooperation CQI；
When the order instruction RI is 2, in non-periodic feedback, the feedback model feeds back broadband and the subband association of each code word
Make CQI and/or broadband PCI, or the PCI of M subband of feedback broadband and selection and cooperation CQI；
When the order instruction RI is 2, in periodic feedback, the broadband of the feedback model feedback UE selections or subband cooperation
CQI and/or broadband PCI.
7. according to the method described in claim 4, it is characterized in that, in the UE according to the order instruction RI and the feedback mould
Before the correspondence of formula determines the corresponding feedback models of the order instruction RI, further include：The base station side gives the UE
The report of one or more sets CSI feedbacks is configured, wherein the often set CSI feedback report pair in one or more sets CSI feedbacks report
The CoMP cooperation modes answered are different.
8. the method according to the description of claim 7 is characterized in that corresponding to the cooperation CQI often covered in CSI feedback report
The CoMP cooperation modes, be that dynamic signaling or semi-static signaling or by the base station is passed through by the base station side
What side pre-defined.
9. according to the method described in claim 8, it is characterized in that, the base station side is by dynamic or semi-static signals UE
Report that the CoMP cooperation modes corresponding to the cooperation CQI include：Combination of nodes when joint transmission JT or dynamic node
It selects to send the cooperation except signal node when DPS or dynamic node silence DPB or cooperative beam formation/cooperative scheduling CB/CS
Whether node has interference.
10. according to the method described in claim 9, it is characterized in that, the base station side one of in the following manner in dynamic or
In semi-static signaling notify UE report it is described cooperation CQI corresponding to the CoMP cooperation modes, the mode include it is following it
One：
Using one or more bits, wherein each bit indicates that the dynamic node selection DPS or dynamic node are silent
DPB or cooperative beam formation/cooperative scheduling CB/CS transmission modes issue and send whether the cooperative node except signal node has interference
And respectively correspond to a CSI report；
Using one or more bit sequences, wherein each bit sequence indicates a kind of TP combinations of the joint transmission JT
And respectively correspond to a CSI report.
11. a kind of feedback device of the phase correction information between cooperation CQI and/or node, is applied to user equipment (UE), feature
Be include：
Module is built, for building CSI report according to the configuration of base station side, wherein the CSI report is for feeding back cooperation CQI
And/or phase correction information PCI, the corresponding feedback model of the CSI report indicate the cooperation using bit corresponding with CQI
The PCI between CQI and use bit corresponding with PMI instruction node；
Feedback module, for being fed back to the cooperation CQI and/or the PCI using the feedback model；Wherein, it uses
Bit corresponding with PMI indicates that the PCI between node includes：
When the quantity of the bit is 1, from the phase school of the selection PCI in set { 1, -1 }, { 1, i } or { 1,-i }
Positive divisor, or do not use phasing；
When the quantity of the bit is 2, from the selection phase correction factor in set { 1, -1, i,-i }；
When the quantity of the bit is 4, from two phase correction factors are selected in set { 1, -1, i,-i }, wherein often
A phase correction factor is indicated with 2 bits.
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