CN105634680B - A kind of feedback of channel state information, acquisition methods and device - Google Patents

A kind of feedback of channel state information, acquisition methods and device Download PDF

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Publication number
CN105634680B
CN105634680B CN201410602804.9A CN201410602804A CN105634680B CN 105634680 B CN105634680 B CN 105634680B CN 201410602804 A CN201410602804 A CN 201410602804A CN 105634680 B CN105634680 B CN 105634680B
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csi
feedback
pilot signal
pilot
information
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CN105634680A (en
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陈润华
高秋彬
拉盖施
李辉
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to PCT/CN2015/092465 priority patent/WO2016066036A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of feedback of channel state information, acquisition methods and devices, to reduce the feedback overhead of UE, reduce the CSI feedback processing difficulty of the side UE, so that the feedback of channel state information, obtain it is more convenient, save resource, meanwhile the channel state information got is able to reflect the overall channel status information after 3D-MIMO figuration.The channel state information acquisition method, comprising: send the first pilot signal to the UE by the first pilot resources in advance for user equipment (UE) configuration；The UE is received by being in advance the CSI of the first progress feedback of UE configuration, and by being in advance the CSI of the second progress feedback of UE configuration, wherein, CSI by the first progress feedback and CSI by second progress feedback, the UE are at least calculated based on first pilot signal measurement.

Description

A kind of feedback of channel state information, acquisition methods and device
Technical field
The present invention relates to field of communication technology more particularly to a kind of feedbacks of channel state information, acquisition methods and device.
Background technique
In existing cellular system, base-station antenna array is generally in horizontally arranged.Transmission end of base station wave beam is only capable of in level Direction is adjusted, and vertical direction is fixed angle of declination, therefore various wave beam formings and precoding technique etc. are all based on What horizontal direction channel information carried out.In fact, since wireless signal is three-dimensional propagation, the side of fixed angle of declination in space Method cannot be such that the performance of system is optimal.
3 dimension (Three-dimensional, 3D) multiple-input, multiple-output (Multiple Input Multiple Output, MIMO a key property) is that base station side number of antennas is very more, and is two-dimensional antenna structure, such as: 8,16,32, 64 antennas etc..
With the development of antenna technology, industry has occurred can be to the active antenna of each a period of time independent control.Using this Kind design, aerial array to the horizontally arranged of three-dimensional and can be arranged vertically, this day by the horizontally arranged enhancing of present bidimensional The mode of linear array makes it possible that wave beam is adjusted in the dynamic of vertical direction.
Frequency division duplex (Frequency Division Duplex, FDD) and time division duplex (Time Division Duplex, TDD) channel state information that three-dimensional wave beam forming and precoding need to report by terminal is realized in system (Channel State Information, CSI), currently, there is following two mode to realize.
Mode one continues to use codebook-based reporting schemes, such as: long term evolution (Long Term Evolution, LTE) Version 8 (Rel-8) system is by the way of.
Such as: there is the 3D-MIMO aerial array of a 4x4 size, currently existing scheme is evolution base station (evolved Node B, eNB) one channel state information reference signals (alternatively referred to as detection reference signal) (Channel State of configuration Information Reference Signal, CSI-RS) resource, antenna array shows 16 antenna ports, corresponding in total Antenna amount, UE feed back a CSI process.But feedback code book must correspond to antenna amount in total, namely correspond to 16 days Line, such code book must include many code words, can meet enough accuracy, corresponding to new number of antennas (16 antenna) Designing new code book is also very complicated standardization effort, while this mode UE needs select can reflect in many code words The optimal code word of channel, the calculating of feedback and the expense of feedback are also very big.In addition, there is problems in which:
One, active antenna of the antenna element of three-dimensional wave beam forming using each a period of time independent control, antenna power amplifier Integrated together with antenna element, in the case where antenna element is in a large number, the transmission power of each antenna element is very low.Such as Fruit uses conventional methods, and the unit of each antenna sends a CSI-RS, and transmission power will be very low, and terminal is possibly can not It realizes correct channel estimation and data transmission, in view of this situation, proposes that antenna virtualization can be used in the prior art Or the mode of sectorization solves the problems, such as this, but terminal will be unable to distinguish mutiple antennas unit after antenna virtualization, also Effective multi-antenna transmission can not be realized using mutiple antennas unit.
Two, antenna port number is excessive, and each antenna element, which sends a CSI-RS, will lead to terminal to each antenna end Mouth requires to carry out channel estimation, and carries out CSI calculating, the complexity of terminal when antenna element number is larger based on channel estimation value It spends very high, it is difficult to realize.
Mode two, eNB configure two CSI-RS resource, and the port number of each resource corresponds to vertical dimensions and horizontal dimensions Number of antennas.
Such as: there is the 3D-MIMO aerial array of a 4x4 size, eNB configures two CSI-RS resource, and each resource has 4 A port, corresponds to two CSI-RS resource, each CSI-RS resource can be used to feed back the channel shape an of different dimensions State, such as horizontal dimensions and vertical dimensions, such UE feed back two CSI processes, one resource of each correspondence.Wherein, each CSI- RS resource is issued from one group of antenna, and UE measures each CSI-RS resource, feeds back its corresponding CSI, be called a CSI into Journey, each CSI process definition is to be associated with a CSI-RS resource in existing standard, the CSI feedback in each CSI process Content is by independently measurement obtains in its corresponding CSI-RS resource, including order instruction (Rank Indication, RI), precoding Matrix indicates that (Precoding Matrix Indicator, PMI) and channel quality indicate (Channel Quality Indicator, CQI), the code stream number that RI reflection UE can be supported in downstream, PMI reflects the volume in a code book of UE feedback Code matrix, CQI reflection RI/PMI are applied to the signal strength that UE can receive after MIMO is encoded.The calculating of CQI must base In the RI/PMI of feedback, the expression of certain signal strength or weakness can be, such as: Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR), or modulation and coding strategy (modulation and coding Scheme, MCS) or other characteristics.The quantity of CQI feedback is adjusted according to RI, such as: RI=1, one can be received by representing UE A code stream then has a CQI feedback；RI > 1, multiple code streams can be received by representing UE, then has multiple CQI feedbacks, in existing LTE In standard, when working as RI > 1, there are two CQI feedbacks.ENB is obtained according to the CSI of the UE vertical dimensions fed back and horizontal dimensions The information of downlink 3D-MIMO figuration, and obtain a CQI value and be used to do downlink adjustment.But there are following in which Problem:
Each CSI process is individually independently to be calculated, the overall channel state letter after cannot reflecting 3D-MIMO figuration Breath, such as: the CSI process of vertical dimensions is obtained by the CSI-RS resource measurement of vertical dimensions, and the CSI process of horizontal dimensions is by water The CSI-RS resource measurement of flat dimension obtains, and does not have any incidence relation between two CSI processes, and eNB is receiving vertical dimension It not can be used directly figuration in 3D-MIMO after the CSI process of degree and horizontal dimensions, and must be to two CSI processes into one Step processing not only increases the complexity of eNB, also reduces to obtain the figuration information and CQI information on 3D-MIMO bidimensional matrix The accuracy of 3D-MIMO figuration.
In conclusion obtaining the technical solution of CSI in existing 3D-MIMO technology, conventional feedback schemes are based on, measure one CSI-RS resource, in such a way that a code book reports a CSI process, the difficulty in computation and feedback overhead of UE is big, is unfavorable for It realizes.
Summary of the invention
The embodiment of the invention provides a kind of feedback of channel state information, acquisition methods and devices, to reduce UE's Feedback overhead, reduce the side UE CSI feedback processing difficulty so that the feedback of channel state information, obtain it is more convenient, save money Source, meanwhile, the channel state information got is able to reflect the overall channel status information after 3D-MIMO figuration.
The acquisition methods of a kind of channel state information CSI provided in an embodiment of the present invention, comprising: by being set in advance for user First pilot resources of standby UE configuration send the first pilot signal to the UE；The UE is received by being in advance UE configuration The CSI of first progress feedback, and by being in advance the CSI of the second progress feedback of UE configuration, wherein pass through described first The CSI of progress feedback and CSI by second progress feedback, is that the UE is at least based on first pilot signal measurement It is calculated.
In the above method provided in an embodiment of the present invention, network side (such as: base station) receive UE by the first process and The CSI of second progress feedback is that UE is at least calculated based on the first pilot signal measurement, should pass through the first progress feedback It CSI and the first pilot signal measurement is at least based on by the CSI of the second progress feedback is calculated, reflect from two dimensions The channel state information of one pilot signal, such as: horizontal dimensions and vertical dimensions, the whole letter after reflecting 3D-MIMO figuration Channel state information, so that base station may be directly applied to the figuration of 3D-MIMO after the CSI for receiving UE feedback, and it is existing UE is compared based on the mode that code book reports in technology, and UE is by being calculated the first process and the second process to pilot signal measurement CSI is fed back, the processing difficulty of UE is reduced.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources Antenna port quantity be N, be N1 by the corresponding antenna port quantity of the CSI of first progress feedback, pass through described the The corresponding antenna port quantity of the CSI of two progress feedbacks is N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first progress feedback CSI, comprising: pre-coding matrix instruction PMI information；The CSI of second progress feedback, comprising: PMI information and channel quality Indicate CQI information, wherein the CQI information be PMI information of the UE based on first progress feedback and described second into What the PMI information of journey feedback obtained.
It only include PMI information in the CSI of the first progress feedback in the above method provided in an embodiment of the present invention, without CQI feedback is carried out, the feedback overhead of UE is reduced.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, further includes: by being in advance Second pilot resources of user equipment (UE) configuration send the second pilot signal to the UE；Pass through first progress feedback CSI and CSI by second progress feedback is that the UE is at least based on first pilot signal measurement and is calculated , specifically: it is that the UE is calculated based on first pilot signal measurement by the CSI of first progress feedback 's；It is that the UE is based on first pilot signal and second pilot signal is total by the CSI of second progress feedback It is obtained with survey calculation.
In the above method provided in an embodiment of the present invention, the CSI by the first progress feedback is that UE is believed based on the first pilot tone What number survey calculation obtained, the CSI by the second progress feedback is that UE is based on the first pilot signal and the second pilot signal is common Survey calculation obtains, and therefore, the CSI that should pass through the first progress feedback has with the CSI by the second progress feedback to be centainly associated with Property, the channel state information of aerial array can be reflected from two dimensions, such as: horizontal dimensions and vertical dimensions reflect Overall channel status information after 3D-MIMO figuration, so that base station can directly apply after the CSI for receiving UE feedback Pass through the first progress feedback compared with UE in the prior art calculates CSI to single resource independent measurement in the figuration of 3D-MIMO CSI and reflect the overall channel status information after 3D-MIMO figuration jointly by the CSI of the second progress feedback, be not necessarily to base It stands and the CSI received is further processed, reduce the processing difficulty of base station.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, further includes: by being in advance Second pilot resources of user equipment (UE) configuration send the second pilot signal to the UE；Pass through first progress feedback CSI and CSI by second progress feedback is that the UE is at least based on first pilot signal measurement and is calculated , specifically: it is that the UE is led based on first pilot signal and described second by the CSI of first progress feedback The common survey calculation of frequency signal obtains；It is that the UE is believed based on first pilot tone by the CSI of second progress feedback Number and the common survey calculation of the second pilot signal obtain.
In the above method provided in an embodiment of the present invention, the CSI by the first progress feedback is that UE is believed based on the first pilot tone Number and the second pilot signal common survey calculation obtain, the CSI by the second progress feedback is also that UE is believed based on the first pilot tone Number and the common survey calculation of the second pilot signal obtain, therefore, should be anti-by the CSI of the first progress feedback and by the second process The CSI of feedback has certain relevance, and the channel state information of aerial array can be reflected from two dimensions, such as: level dimension Degree and vertical dimensions, the overall channel status information after reflecting 3D-MIMO figuration, so that base station is receiving UE feedback After CSI, the figuration of 3D-MIMO may be directly applied to, CSI phase is calculated to single resource independent measurement with UE in the prior art Than the CSI by the first progress feedback and the CSI by the second progress feedback reflect the entirety after 3D-MIMO figuration jointly Channel state information is further processed the CSI received without base station, reduces the processing difficulty of base station.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first progress feedback CSI, comprising: PMI information.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first progress feedback CSI, further includes: the corresponding order instruction RI information of the PMI information.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, second progress feedback CSI, comprising: the corresponding RI information of PMI information, the PMI information, and the PMI information based on second progress feedback and institute State the CQI information that the PMI information of the first progress feedback obtains.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources Antenna port quantity be equal to through the corresponding antenna port quantity of CSI of first progress feedback, second pilot tone provides The antenna port quantity in source is equal to the corresponding antenna port quantity of CSI by second progress feedback.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources The configuration period be second pilot resources configuration L times of the period, wherein L is the positive integer more than or equal to 1.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first progress feedback The feedback cycle of CSI be L times of feedback cycle of CSI of second progress feedback, wherein L is just more than or equal to 1 Integer.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources It is channel state information reference signals CSI-RS resource or public reference signal CRS resource with second pilot resources.
The feedback method of a kind of channel state information CSI provided in an embodiment of the present invention, comprising: user equipment (UE) determines net Network side is the first pilot resources, the first process and the second process of UE configuration in advance；The UE is at least passed through based on network side The first CSI and the 2nd CSI is calculated in the first pilot signal measurement that first pilot resources are sent；The UE passes through described First process is by first CSI feedback to network side, and by second process by second CSI feedback to network Side.
In the above method provided in an embodiment of the present invention, UE is at least based on the first pilot signal measurement and CSI is calculated It is at least based on the first pilot signal measurement with the 2nd CSI, the first CSI and the 2nd CSI and is calculated, reflected from two dimensions The channel state information of first pilot signal, such as: horizontal dimensions and vertical dimensions, the entirety after reflecting 3D-MIMO figuration Channel state information, it is and existing so that base station may be directly applied to the figuration of 3D-MIMO after the CSI for receiving UE feedback There is UE in technology to compare based on the mode that code book reports, UE by pilot signal measurement be calculated the first process and second into Journey feeds back CSI, reduces the processing difficulty of UE.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources Antenna port quantity be N, the corresponding antenna port quantity of the first CSI is N1, the corresponding antenna port of the 2nd CSI Quantity is N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, the first CSI, comprising: Pre-coding matrix instruction PMI information；2nd CSI, comprising: PMI information and channel quality indicator CQI information, wherein described CQI information is that the UE is obtained based on the PMI information in the PMI information and the 2nd CSI in the first CSI.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, further includes: the UE is determined Network side is the second pilot resources of UE configuration in advance；The UE is at least based on network side and is sent out by first pilot resources The first CSI and the 2nd CSI is calculated in the first pilot signal measurement sent, specifically: the UE is believed based on first pilot tone Number survey calculation obtains the first CSI；The UE is based on first pilot signal and network side passes through second pilot resources The common survey calculation of the second pilot signal sent obtains the 2nd CSI.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, further includes: the UE is determined Network side is the second pilot resources of UE configuration in advance；The UE is at least based on network side and is sent out by first pilot resources The first CSI and the 2nd CSI is calculated in the first pilot signal measurement sent, specifically: the UE is believed based on first pilot tone Number and the common survey calculation of the second pilot signal that is sent by second pilot resources of network side obtain the first CSI；It is described UE is measured based on first pilot signal and network side by the second pilot signal that second pilot resources are sent jointly The 2nd CSI is calculated.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, the first CSI, comprising: PMI information.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, the first CSI is also wrapped It includes: the corresponding order instruction RI information of the PMI information.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, the 2nd CSI, comprising: The corresponding RI information of PMI information, the PMI information, and based in the PMI information and the first CSI in the 2nd CSI The CQI information that PMI information obtains.
In a kind of possible embodiment, in the above method provided in an embodiment of the present invention, first pilot resources Antenna port quantity be equal to the corresponding antenna port quantity of the first CSI, the antenna port number of second pilot resources Amount is equal to the corresponding antenna port quantity of the 2nd CSI.
The acquisition device of channel state information CSI provided in an embodiment of the present invention a kind of, comprising: first unit, for leading to It crosses and sends the first pilot signal to the UE for the first pilot resources of user equipment (UE) configuration in advance；Second unit is connected to The first unit passes through the CSI of the first progress feedback for UE configuration in advance for receiving the UE, and by preparatory For the CSI of the second progress feedback of UE configuration, wherein by the CSI of first progress feedback and by described second into The CSI of journey feedback, the UE are at least calculated based on first pilot signal measurement.
In above-mentioned apparatus provided in an embodiment of the present invention, the device (such as: base station) receive UE by the first process and The CSI of second progress feedback is that UE is at least calculated based on the first pilot signal measurement, should pass through the first progress feedback It CSI and the first pilot signal measurement is at least based on by the CSI of the second progress feedback is calculated, reflect from two dimensions The channel state information of one pilot signal, such as: horizontal dimensions and vertical dimensions, the whole letter after reflecting 3D-MIMO figuration Channel state information, so that base station may be directly applied to the figuration of 3D-MIMO after the CSI for receiving UE feedback, and it is existing UE is compared based on the mode that code book reports in technology, and UE is by being calculated the first process and the second process to pilot signal measurement CSI is fed back, the processing difficulty of UE is reduced.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, first pilot resources Antenna port quantity be N, be N1 by the corresponding antenna port quantity of the CSI of first progress feedback, pass through described the The corresponding antenna port quantity of the CSI of two progress feedbacks is N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, the first unit is also used In: the second pilot signal is sent to the UE by the second pilot resources in advance for user equipment (UE) configuration；Pass through described The CSI of one progress feedback and CSI by second progress feedback is that the UE is at least based on first pilot signal and surveys What amount was calculated, specifically: it is that the UE is surveyed based on first pilot signal by the CSI of first progress feedback What amount was calculated；It is that the UE is based on first pilot signal and described second by the CSI of second progress feedback The common survey calculation of pilot signal obtains.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, the first unit is also used In: the second pilot signal is sent to the UE by the second pilot resources in advance for user equipment (UE) configuration；Pass through described The CSI of one progress feedback and CSI by second progress feedback is that the UE is at least based on first pilot signal and surveys Amount is calculated, specifically: by the CSI of first progress feedback, be the UE be based on first pilot signal and What the common survey calculation of the second pilot signal obtained；It is described in the UE is based on by the CSI of second progress feedback What the first pilot signal and the common survey calculation of the second pilot signal obtained.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, first pilot resources Antenna port quantity be equal to through the corresponding antenna port quantity of CSI of first progress feedback, second pilot tone provides The antenna port quantity in source is equal to the corresponding antenna port quantity of CSI by second progress feedback.
The feedback device of a kind of channel state information CSI provided in an embodiment of the present invention, comprising: resource determination unit is used First pilot resources of the user equipment (UE) configuration where determining network side in advance and being the device, the first process and second into Journey；Measuring unit is connected to the resource determination unit, at least being sent based on network side by first pilot resources The first pilot signal measurement the first CSI and the 2nd CSI is calculated；Feedback unit, be connected to the resource determination unit and The measuring unit is used for first CSI feedback to network side through first process, and passes through second process By second CSI feedback to network side.
In above-mentioned apparatus provided in an embodiment of the present invention, the UE where the device is at least based on the first pilot signal measurement Calculation obtains CSI and the 2nd CSI, and the first CSI and the 2nd CSI are at least based on the first pilot signal measurement and are calculated, from two A dimension reflects the channel state information of the first pilot signal, such as: horizontal dimensions and vertical dimensions reflect 3D-MIMO Overall channel status information after figuration, so that base station may be directly applied to 3D- after the CSI for receiving UE feedback The figuration of MIMO, compared with the mode that UE in the prior art is reported based on code book, UE is by being calculated pilot signal measurement First process and the second progress feedback CSI, reduce the processing difficulty of UE.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, first pilot resources Antenna port quantity be N, the corresponding antenna port quantity of the first CSI is N1, the corresponding antenna port of the 2nd CSI Quantity is N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, the resource determination unit It is also used to: determining network side in advance and be the second pilot resources of the UE configuration where the device；The measuring unit is specific to use In: the first CSI is calculated based on first pilot signal measurement；Pass through institute based on first pilot signal and network side The common survey calculation of the second pilot signal for stating the transmission of the second pilot resources obtains the 2nd CSI.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, the resource determination unit It is also used to: determining network side in advance and be the second pilot resources of the UE configuration where the device；The measuring unit is specific to use In: it is measured jointly based on first pilot signal and network side by the second pilot signal that second pilot resources are sent The first CSI is calculated；It is led based on first pilot signal and network side by the second of second pilot resources transmission The common survey calculation of frequency signal obtains the 2nd CSI.
In a kind of possible embodiment, in above-mentioned apparatus provided in an embodiment of the present invention, first pilot resources Antenna port quantity be equal to the corresponding antenna port quantity of the first CSI, the antenna port number of second pilot resources Amount is equal to the corresponding antenna port quantity of the 2nd CSI.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the acquisition methods of CSI of network side provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of the calculation method of CSI of the side UE provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the calculation method of another CSI of the side UE provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the calculation method of another CSI of the side UE provided in an embodiment of the present invention；
Fig. 5 A-5C is the schematic diagram of the feedback system of the first progress feedback CSI provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of the feedback method of CSI of the side UE provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of the acquisition device of CSI of network side provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the acquisition device of another CSI of network side provided in an embodiment of the present invention；
Fig. 9 is a kind of structural schematic diagram of the feedback device of CSI of the side UE provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of the feedback device of another CSI of the side UE provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of feedback of channel state information, acquisition methods and devices, to reduce UE's Feedback overhead, reduce the side UE CSI feedback processing difficulty so that the feedback of channel state information, obtain it is more convenient, save money Source, meanwhile, the channel state information got is able to reflect the overall channel status information after 3D-MIMO figuration, reduces base station Processing difficulty.
Since wireless signal is three-dimensional propagation in space, the method for fixed angle of declination cannot be such that the performance of system reaches It is optimal.For reducing inter-cell interference, improving system performance has critically important meaning for the wave beam adjustment of vertical direction.
First process described in the embodiment of the present invention and the second process can be two processes, be also possible to it is same into Two subprocess of journey are illustrated in the embodiment of the present invention with two processes, and the first process and the second process are only to be The title distinguishing two processes and defining；First pilot resources described in the embodiment of the present invention and the second pilot resources can be with It is the resource of two separate configurations, is also possible to two child resources of same resource, is independently matched in the embodiment of the present invention with two The resource set is illustrated, the name that the first pilot resources and the second pilot resources define just for the sake of distinguishing two resources Claim；First pilot resources and second pilot resources can be channel state information reference signals (CSI-RS) resource Or public reference signal (Common Reference Signal, CRS) resource etc..
The embodiment of the present invention proposes that eNB can be equipped with CSI-RS resource to UE and be used to measure.In conventional wireless system ratio In LTE, pilot signal can be used to be channel information measurement either wireless resource management (Radio Resource Management, RRM) measurement, including Reference Signal Received Power (Reference Signal Receiving Power, ) and Reference Signal Received Quality (Reference Signal Receiving Quality, RSRQ) etc. RSRP.Such measurement can To measure realization to public reference signal (Common Reference Signal, CRS) either CSI-RS, but base It can also equally realize that this will not be repeated here in the measurement in other pilot signals.
In network side, by taking base station as an example, a kind of acquisition methods of channel state information CSI provided in an embodiment of the present invention, As shown in Figure 1, comprising:
Step 102, the first pilot signal is sent to UE by the first pilot resources in advance for user equipment (UE) configuration；
First pilot resources specifically refer to pass through for the time domain and frequency domain resource that send the first pilot signal The resource allocation information of first pilot resources is notified to UE that the high layer information includes the transmission of the first pilot signal by high layer information Period, displacement (offset), power and index (index) of the first pilot signal etc..Can there is multiple a subframe inside LTE There are 20 CSI-RS resource optional inside alternative CSI-RS resource, such as unified sub- frame of 2 aerial systems, the rope of CSI-RS Be incorporated in that notice UE is allocated to it is which indexes corresponding CSI-RS resource.
Each CSI-RS resource has subframe independent (subframe) period and displacement.If the transmission of CSI-RS Period is 5 subframes, then offset indicate CSI-RS sent since which subframe in each frame, can with value 0,1,2, 3 or 4, such as when value 0, CSI-RS is sent since the subframe 0 in each frame, when value 1, CSI-RS is from each frame Subframe 1 start to send.
Step 104, reception UE passes through the CSI of the first progress feedback for UE configuration in advance, and by being in advance to be somebody's turn to do The CSI of second progress feedback of UE configuration, wherein the CSI by the first progress feedback and CSI by the second progress feedback, It is that UE is at least calculated based on the first pilot signal measurement.
In method provided in an embodiment of the present invention, base station receives the CSI that UE passes through the first process and the second progress feedback, It is that UE is at least calculated based on the first pilot signal measurement, the CSI of the first progress feedback should be passed through and pass through the second process The CSI of feedback is at least based on the first pilot signal measurement and is calculated, and the channel of the first pilot signal is reflected from two dimensions Status information, such as: horizontal dimensions and vertical dimensions, the overall channel status information after reflecting 3D-MIMO figuration, so that base It stands after the CSI for receiving UE feedback, may be directly applied to the figuration of 3D-MIMO, be based on code book with UE in the prior art The mode reported is compared, and UE reduces UE by the way that the first process and the second progress feedback CSI is calculated to pilot signal measurement Processing difficulty.
Certainly, it should be noted that base station by advance for UE be configured to feedback CSI the first process and second into Journey, such as: feedback cycle, displacement and the accuracy of CSI are configured, base can be convenient in order to the control that base station feeds back CSI to UE It stands and preferably adjusts the parameter of antenna, improve performance.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the antenna end of the first pilot resources Mouth quantity is N, is N1 by the corresponding antenna port quantity of the CSI of first progress feedback, passes through the second progress feedback The corresponding antenna port quantity of CSI is N2, and the product of N1 and N2 is equal to N.
As a more specific embodiment, as shown in Fig. 2, for example: one 4 × 4 aerial array, base station are matched for UE It sets first pilot resources 202 of 16 ports, and sends the first pilot signal to UE by first pilot resources 202, when It so, include sending cycle, displacement, power and the index of the first pilot signal etc. of the first pilot signal in the first pilot resources； UE is based on the first pilot signal and measures the CSI and the second dimension (example that the first dimension (such as: horizontal dimensions) is calculated CSI such as: vertical dimensions), and the CSI feedback of first dimension to base station is passed through by the second process by the first process 204 206 by the CSI feedback of second dimension to base station, since the CSI of the first dimension and CSI of the second dimension is UE to the first pilot tone What two dimensions of signal measured, therefore, the corresponding antenna port of the CSI of the CSI of the first dimension and the second dimension Number is not the total antenna port number of aerial array, and only the CSI of the antenna port number of dimension namely the first dimension is (logical Cross the CSI of the first progress feedback) corresponding antenna port quantity is 4, the CSI of the second dimension (passes through the second progress feedback CSI) corresponding antenna port quantity is also 4.
Specifically, it is assumed that the PMI information in the CSI of the first process 204 feedback is denoted as PMI1, the second process 206 feedback CSI in PMI information be denoted as PMI2, then can be calculated by the following formula PMI1 and PMI2:
(PMI1, PMI2)=arg optV1 ∈ codebook1, V2 ∈ codebook2f(H×)
Wherein, arg function is so that the optimal value set of PMI1 and PMI2；The optimization of opt function representation calculates, and is used for Optimal optimization is selected in all optional optimization spaces；H is total channel estimation that UE obtains the first pilot resources measurement Value reflects that three-dimensional antenna array is a Nr x K matrix, Nr is UE receiving antenna quantity, and K is total antenna to the channel of UE Quantity (such as: 16)；V1 traverses value in the first dimension precoding figuration matrix code book 1 (i.e. codebook1), and V2 is second Value is traversed in dimension precoding figuration matrix code book 2 (i.e. codebook2), V1 and V2 respectively correspond to the code book of 4 antennas, To find so that PMI1 and PMI2 optimal value set, PMI1, PMI2 are that the pre-coding matrix of the aerial array of UE feedback refers to Show information.Represent Kronecker product, it is notable that in above formulaRepresent 4 days for passing through two dimensions The figuration matrix of line generates the figuration matrix of the 16 overall antennas of a 3D-MIMO.Here Kronecker product is one kind Possible scheme also can be used other schemes and pass through vertical dimensions figuration matrix and horizontal dimensions in another embodiment Figuration matrix generates overall figuration matrix, is not used to specifically limit herein.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the CSI of the first progress feedback, packet It includes: pre-coding matrix instruction PMI information；The CSI of second progress feedback, comprising: PMI information and channel quality indicator CQI information, Wherein, CQI information is that the PMI information of PMI information and second progress feedback of the UE based on the first progress feedback obtains.
As more specific embodiment, it is assumed that one uses least mean-square error (Minimum Mean Square Error, MMSE) receiver UE, obtain optimal PMI1 (correspond to figuration matrix V 1) and PMI2 (correspondence in UE survey calculation In figuration matrix V 2) after, the calculating of r-th of code stream CQI is as follows:
Wherein,It is that the 3D-MIMO that UE is observed uses the practical letter after V1 and V2 matrix figuration Road, ()r,rIt is the value of cornerwise variable of the r of a matrix, I is a diagonal matrix (identify matrix), diagonally Each variable on line is 1, and the variable on other off-diagonals is the rectangle difference square that 0, R is the noise/interference that UE is measured Battle array (covariance matrix), is the matrix of a Nr x Nr, Nr is the quantity of UE receiving antenna.
It only include PMI information in the CSI of the first progress feedback in method provided in an embodiment of the present invention, and without CQI feedback reduces the feedback overhead of UE.
Specifically, in CSI of the UE by measuring the first dimension being calculated to the first pilot signal, comprising: It include: PMI2 in PMI1, the CSI of the second dimension, further, UE can calculate hypothesis using PMI1 and PMI2 to 3D-MIMO CQI value after carrying out wave beam forming, and by the first process or the second progress feedback CQI value, implement as more preferred Example, passes through the value of the CSI feedback of the second progress feedback CQI.
It is base station above for UE one pilot resources of configuration, base station carries out two dimensions of feedback based on the pilot resources The case where CSI, in the specific implementation, base station may be that UE configures two pilot resources, be situated between below with reference to specific embodiment Continue base station be UE configure two pilot resources the case where.
Embodiment one
In a kind of possible embodiment, in method provided in an embodiment of the present invention, further includes: by being in advance user Second pilot resources of equipment UE configuration send the second pilot signal to UE；By the CSI of the first progress feedback and pass through second The CSI of progress feedback is that UE is at least calculated based on the first pilot signal measurement, specifically: pass through the first progress feedback CSI, be that UE is calculated based on the first pilot signal measurement；It is that UE is led based on first by the CSI of the second progress feedback What frequency signal and the common survey calculation of the second pilot signal obtained.
It in this embodiment, is that UE is calculated based on the first pilot signal measurement by the CSI of the first progress feedback, CSI by the second progress feedback is that UE is based on the first pilot signal and the common survey calculation of the second pilot signal obtains, therefore, This passes through the CSI of the first progress feedback and has certain relevance by the CSI of the second progress feedback, can be anti-from two dimensions The channel state information of aerial array has been reflected, such as: horizontal dimensions and vertical dimensions, the entirety after reflecting 3D-MIMO figuration Channel state information, it is and existing so that base station may be directly applied to the figuration of 3D-MIMO after the CSI for receiving UE feedback There is in technology UE calculate CSI to single resource independent measurement to compare, it is anti-by the CSI of the first progress feedback and by the second process The CSI of feedback reflects the overall channel status information after 3D-MIMO figuration jointly, further to the CSI received without base station Processing, reduces the processing difficulty of base station.
As more specific embodiment, as shown in figure 3, base station is that UE configures the first pilot resources 302 and the second pilot tone Resource 304, the first process 306 and the second process 308 are based on the first pilot resources by the CSI that the first process 306 is fed back The first pilot signal measurement in 302 is calculated, it is assumed that the PMI information in CSI fed back by the first process 306 is denoted as PMI1, then PMI1 can be calculated by the following formula:
PMI1=arg optV1∈codebook1f(H1×V1)
Wherein, H1 is the channel estimation value that UE measures the first pilot resources, and V1 is in the first dimension precoding Value is traversed in figuration matrix code book 1 (i.e. codebook1), to find so that PMI1 optimal value, corresponding 4 antennas of V1 Code book.
It and is based on the first pilot signal and second in the first pilot resources 302 by the CSI that the second process 308 is fed back What the common survey calculation of the second pilot signal in pilot resources 304 obtained, it is assumed that in the CSI fed back by the second process 308 PMI information be denoted as PMI2, then the calculating of PMI2 be based on PMI1 specifically can be by following to optimize the performance of 3D-MIMO Formula calculates:
PMI2=arg optV2∈codebook2f(g×)
Wherein, H1 and H2 is the letter that UE respectively measures the first pilot resources 302 and the second pilot resources 304 Road estimated value, V1 traverse value in the first dimension precoding figuration matrix code book 1 (i.e. codebook1), and V2 is in the second dimension Value is traversed in precoding figuration matrix code book 2 (i.e. codebook2), to find so that PMI2 optimal value, V1 and V2 are each Calculating from the code book namely PMI2 of corresponding 4 antennas is calculated based on the first pilot signal and the second pilot signal measurement It obtains, and the calculating of PMI2 depends on the calculated result of PMI1, PMI1 and PMI2 have certain relevance.
It is possible to further calculate hypothesis PMI1 and PMI2 to the CQI value after 3D-MIMO progress wave beam forming, and pass through First process or the second progress feedback CQI value pass through the CSI feedback of the second progress feedback as more preferred embodiment The value of the CQI.
Embodiment two
In a kind of possible embodiment, in method provided in an embodiment of the present invention, further includes: by being in advance user Second pilot resources of equipment UE configuration send the second pilot signal to UE；By the CSI of the first progress feedback and pass through second The CSI of progress feedback is that UE is at least calculated based on the first pilot signal measurement, specifically: pass through the first progress feedback CSI, be that UE is obtained based on the first pilot signal and the common survey calculation of the second pilot signal；Pass through the second progress feedback CSI is that UE is obtained based on the first pilot signal and the common survey calculation of the second pilot signal.
Should be in embodiment, the CSI by the first progress feedback is that UE is based on the first pilot signal and the second pilot signal What common survey calculation obtained, the CSI by the second progress feedback is also that UE is based on the first pilot signal and the second pilot signal Common survey calculation obtains, and therefore, should pass through the CSI of the first progress feedback and have centainly by the CSI of the second progress feedback Relevance can reflect the channel state information of aerial array from two dimensions, such as: horizontal dimensions and vertical dimensions, instead Overall channel status information after having reflected 3D-MIMO figuration so that base station receive UE feedback CSI after, can be direct Pass through the first process compared with UE in the prior art calculates CSI to single resource independent measurement applied to the figuration of 3D-MIMO The CSI of feedback and reflect the overall channel status information after 3D-MIMO figuration, nothing jointly by the CSI of the second progress feedback It needs base station to be further processed the CSI received, reduces the processing difficulty of base station.
As more specific embodiment, as shown in figure 4, base station is that UE configures the first pilot resources 402 and the second pilot tone Resource 404, the first process 406 and the second process 408 are based on the first pilot resources by the CSI that the first process 406 is fed back The common survey calculation of the second pilot signal in the first pilot signal and the second pilot resources 404 in 402 obtains, and passes through second The CSI that process 408 is fed back is also based in the first pilot signal in the first pilot resources 402 and the second pilot resources 404 The common survey calculation of second pilot signal obtains, it is assumed that the PMI information in CSI fed back by the first process 406 is denoted as PMI1, the PMI information in CSI fed back by the second process 408 are denoted as PMI2, then PMI1, PMI2 can pass through following formula It calculates:
(PMI1, PMI2)=arg optV1 ∈ codebook1, V2 ∈ codebook2f(g×)
Wherein, H1 and H2 is the letter that UE respectively measures the first pilot resources 402 and the second pilot resources 404 Road estimated value, V1 traverse value in the first dimension precoding figuration matrix code book 1 (i.e. codebook1), and V2 is in the second dimension Value is traversed in precoding figuration matrix code book 2 (i.e. codebook2), to find so that PMI1 and PMI2 optimal value, V1 It is to be all based on the first pilot signal and second that the calculating of the code book namely PMI1 and PMI2 of 4 antennas is respectively corresponded to V2 What pilot signal measurement was calculated, the first pilot resources are based on PMI1 in the prior art and are independently calculated, and PMI2 is based on second What pilot resources independently calculated compares, and the PMI1 and PMI2 that the embodiment of the present invention is calculated have certain relevance, more preferably The overall channel status information reflected after 3D-MIMO figuration.
It is possible to further calculate assuming that PMI1 and PMI2 wave beam forming is carried out to 3D-MIMO after CQI value, and lead to The first process or the second progress feedback CQI value are crossed, as more preferred embodiment, the CSI by the second progress feedback is anti- Present the value of the CQI.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the CSI of the first progress feedback, packet It includes: PMI information.
In the specific implementation, when only including PMI information in the CSI of the first progress feedback, the PMI of UE selection should be at one It is selected in the code book of fixed RI, the value of RI can fix here, be also possible to base station by high layer information and configure a RI value. Such as: RI=1, at this moment the PMI of UE feedback is a vector, the figuration vector that reflection UE recommends, because of RI=1, UE only calculates PMI in an order (rank), does not need to find optimal PMI in all rank, the complexity meeting that PMI is calculated Corresponding to reduce, simultaneously because not feeding back RI and CQI, the expense of feedback is also accordingly reduced.
As more specific embodiment, in the application of 3D-MIMO, base station configures two pilot resources, the first pilot tone Resource corresponds to the measurement of horizontal dimensions, and the second pilot resources correspond to the measurement of vertical dimensions.By taking horizontal dimensions as an example, vertical dimensions Application can be equal use, do not repeat here.Base station configuration UE vertical dimensions feed back PMI, in the horizontal direction feed back RI, PMI and CQI, the information of the vertical dimensions figuration vector of the PMI reflection UE feedback of vertical dimensions.
The measurement of RI, PMI and CQ of horizontal dimensions are led by the second pilot resources of vertical dimensions and the first of horizontal dimensions Frequency resource measure jointly obtain namely UE measure horizontal dimensions RI, CQI and PMI when, calculating also use vertical dimensions PMI.
The PMI feedback of vertical dimensions can be periodically or non-periodically.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the CSI of the first progress feedback, also It include: the corresponding order instruction RI information of PMI information.
When it is implemented, further including that the corresponding RI information of PMI information is then fed back in the CSI for passing through the first progress feedback PMI information will corresponding to the RI of feedback, such as: RI=1, then PMI information only calculated in a fixed rank, do not need in institute Optimal PMI is found in some rank.Meanwhile by not including CQI information in the CSI of the first progress feedback, the meter of UE is reduced Calculate difficulty and feedback overhead.
When being fed back especially by the first process, the feedback of PMI and RI can by the way of as shown in Figure 5A It is fed back in same subframe, feedback cycle is identical；It can also be fed back by the way of as shown in Figure 5 B, but the feedback week of PMI and RI Phase is different, and the feedback cycle of PMI is less than the feedback cycle of RI, it is of course also possible to use mode as shown in Figure 5 C, PMI and RI It is fed back in different subframes, and feedback cycle separate configurations.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the CSI of the second progress feedback, packet Include: the corresponding RI information of PMI information, the PMI information, and the PMI information based on second progress feedback and the first process it is anti- The CQI information that the PMI information of feedback obtains.
It is worth noting that when including PMI information or PMI information and RI information in the CSI by the first progress feedback Combination when, should include PMI information, the corresponding RI information of the PMI information, Yi Jiji by the CSI information of the second progress feedback The CQI information namely CQI information obtained in the PMI information of second progress feedback and the PMI information of the first progress feedback is base In assuming that the first progress feedback PMI information and the second progress feedback PMI information to aerial array carry out wave beam forming after The CQI value arrived, to reflect the overall channel status information after 3D-MIMO figuration.
It certainly, may be anti-by the second process it will be apparent to a skilled person that in another embodiment When combination in the CSI of feedback comprising PMI information or PMI information and RI information, and pass through the CSI information of the first progress feedback It should include PMI information, the corresponding RI information of the PMI information, and the PMI information based on first progress feedback and the second process The CQI information that the PMI information of feedback obtains.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the antenna end of the first pilot resources Mouth quantity is equal to the corresponding antenna port quantity of CSI by the first progress feedback, the antenna port quantity of the second pilot resources Equal to the corresponding antenna port quantity of CSI for passing through the second progress feedback.
In the specific implementation, when base station is that UE configures two pilot resources, then the antenna port number of each pilot resources Amount is equal with by the corresponding antenna port quantity of CSI of the first process and the second progress feedback.Such as: for 4 × 4 antenna Array, the first pilot resources correspond to horizontal dimensions, and dimension is 4 antennas, then pass through the corresponding antenna end of CSI of the first progress feedback Mouth number is also 4；Second pilot resources correspond to vertical dimensions, and dimension is 4 antennas, then corresponding by the CSI of the second progress feedback Antenna port number is also 4.
In the specific implementation, the configuration period of the first pilot resources and the configuration period of the second pilot resources can be different, Preferably, the configuration period of the first pilot resources is configuration L times of the period of the second pilot resources, wherein L for more than or equal to 1 positive integer, such as: the first pilot resources correspond to vertical dimensions, and the second pilot resources correspond to horizontal dimensions, when UE is opposite When base station is mobile, relative to base station, speed UE mobile in vertical dimensions much larger than UE in the movement speed of horizontal dimensions.
Preferably, the feedback cycle of the feedback cycle of the CSI of the first progress feedback and the CSI of the second progress feedback can not Together, the feedback cycle of the CSI of the first progress feedback is L times of feedback cycle of the CSI of the second progress feedback, wherein L for greater than Or the positive integer equal to 1.For example, the first CSI process is used to feed back the channel information of vertical dimensions, the 2nd CSI process is used to anti- The channel information for presenting horizontal dimensions, when UE is mobile relative to base station, relative to base station, UE is remote in the movement speed of horizontal dimensions The speed mobile in vertical dimensions greater than UE, thus the rate of horizontal dimensions feedback can than rate that vertical dimensions are fed back compared with Fastly.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the first pilot resources and second are led Frequency resource is channel state information reference signals CSI-RS resource or public reference signal CRS resource.
Correspondingly, in user equipment side, a kind of feedback method of channel state information CSI provided in an embodiment of the present invention, As shown in Figure 6, comprising:
Step 602, user equipment (UE) determines network side in advance and is the first pilot resources of UE configuration, the first process and the Two processes；
Step 604, UE is at least calculated based on network side by the first pilot signal measurement that the first pilot resources are sent To the first CSI and the 2nd CSI；
Step 606, UE passes through the first process for the first CSI feedback to network side, and by the second process that the 2nd CSI is anti- It is fed to network side.
In method provided in an embodiment of the present invention, UE is at least based on the first pilot signal measurement and CSI and is calculated Two CSI, the first CSI and the 2nd CSI are at least based on the first pilot signal measurement and are calculated, and reflect first from two dimensions The channel state information of pilot signal, such as: horizontal dimensions and vertical dimensions, the overall channel after reflecting 3D-MIMO figuration Status information, so that base station may be directly applied to the figuration of 3D-MIMO, with existing skill after the CSI for receiving UE feedback UE is compared based on the mode that code book reports in art, and UE is by being calculated the first process to pilot signal measurement and the second process is anti- CSI is presented, the processing difficulty of UE is reduced.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the day of first pilot resources Line port number is N, and the corresponding antenna port quantity of the first CSI is N1, the corresponding antenna port quantity of the 2nd CSI For N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the first CSI, comprising: prelist Code matrix indicates PMI information；2nd CSI, comprising: PMI information and channel quality indicator CQI information, wherein the CQI Information is that the UE is obtained based on the PMI information in the PMI information and the 2nd CSI in the first CSI.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, further includes: the UE determines network Side is the second pilot resources of UE configuration in advance；What the UE was at least sent based on network side by first pilot resources The first CSI and the 2nd CSI is calculated in first pilot signal measurement, specifically: the UE is surveyed based on first pilot signal The first CSI is calculated in amount；The UE is based on first pilot signal and network side and is sent by second pilot resources The common survey calculation of the second pilot signal obtain the 2nd CSI.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, further includes: the UE determines network Side is the second pilot resources of UE configuration in advance；What the UE was at least sent based on network side by first pilot resources The first CSI and the 2nd CSI is calculated in first pilot signal measurement, specifically: the UE be based on first pilot signal and The common survey calculation of the second pilot signal that network side is sent by second pilot resources obtains the first CSI；The UE base In the common survey calculation of the second pilot signal that first pilot signal and network side are sent by second pilot resources Obtain the 2nd CSI.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the first CSI, comprising: PMI Information.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the first CSI, further includes: institute State the corresponding order instruction RI information of PMI information.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the 2nd CSI, comprising: PMI The corresponding RI information of information, the PMI information, and based on the PMI letter in the PMI information and the first CSI in the 2nd CSI Cease obtained CQI information.
In a kind of possible embodiment, in method provided in an embodiment of the present invention, the day of first pilot resources Line port number is equal to the corresponding antenna port quantity of the first CSI, the antenna port quantity etc. of second pilot resources In the corresponding antenna port quantity of the 2nd CSI.
In network side, a kind of acquisition device of channel state information CSI provided in an embodiment of the present invention, as shown in fig. 7, packet It includes: first unit 702, for sending the first pilot signal to institute by the first pilot resources in advance for user equipment (UE) configuration State UE；Second unit 704 is connected to the first unit 702, for receiving the UE by being in advance the first of UE configuration The CSI of progress feedback, and by being in advance the CSI of the second progress feedback of UE configuration, wherein pass through first process The CSI of feedback and CSI by second progress feedback is that the UE is at least based on first pilot signal measurement and calculates It obtains.
In device provided in an embodiment of the present invention, which receives UE and passes through the first process and the second progress feedback CSI is that UE is at least calculated based on the first pilot signal measurement, should pass through the CSI of the first progress feedback and by second The CSI of progress feedback is at least based on the first pilot signal measurement and is calculated, and reflects the first pilot signal from two dimensions Channel state information, such as: horizontal dimensions and vertical dimensions, the overall channel status information after reflecting 3D-MIMO figuration make Base station is obtained after the CSI for receiving UE feedback, the figuration of 3D-MIMO is may be directly applied to, is based on UE in the prior art The mode that code book reports is compared, and UE is reduced by the way that the first process and the second progress feedback CSI is calculated to pilot signal measurement The processing difficulty of UE.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the day of first pilot resources Line port number be N, by the corresponding antenna port quantity of the CSI of first progress feedback be N1, by described second into The corresponding antenna port quantity of CSI of journey feedback is N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the first unit 702 is also used In: the second pilot signal is sent to the UE by the second pilot resources in advance for user equipment (UE) configuration；Pass through described The CSI of one progress feedback and CSI by second progress feedback is that the UE is at least based on first pilot signal and surveys What amount was calculated, specifically: it is that the UE is surveyed based on first pilot signal by the CSI of first progress feedback What amount was calculated；It is that the UE is based on first pilot signal and described second by the CSI of second progress feedback The common survey calculation of pilot signal obtains.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the first unit 702 is also used In: the second pilot signal is sent to the UE by the second pilot resources in advance for user equipment (UE) configuration；Pass through described The CSI of one progress feedback and CSI by second progress feedback is that the UE is at least based on first pilot signal and surveys Amount is calculated, specifically: by the CSI of first progress feedback, be the UE be based on first pilot signal and What the common survey calculation of the second pilot signal obtained；It is described in the UE is based on by the CSI of second progress feedback What the first pilot signal and the common survey calculation of the second pilot signal obtained.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the day of first pilot resources Line port number is equal to the corresponding antenna port quantity of CSI by first progress feedback, second pilot resources Antenna port quantity is equal to the corresponding antenna port quantity of CSI by second progress feedback.
In embodiments of the present invention, described device can be the network equipments such as base station, wherein first unit 702 can adopt With signal projector or transmitter, second unit 704 can use signal receiver or receiver.
Referring to Fig. 8, the acquisition device of another CSI of network side provided in an embodiment of the present invention includes:
Processor 800 executes following process for reading the program in memory 820:
The first pilot signal is sent extremely by the first pilot resources in advance for user equipment (UE) configuration using transceiver 810 UE；
The CSI that UE passes through the first progress feedback for UE configuration in advance is received by transceiver 810, and by preparatory For the CSI of the second progress feedback of UE configuration, wherein by the CSI of the first progress feedback and pass through the second progress feedback CSI is that UE is at least calculated based on the first pilot signal measurement.
Transceiver 810, for sending and receiving data under the control of processor 800.
Processor 800 is also used to:
The second pilot signal is sent extremely by the second pilot resources in advance for user equipment (UE) configuration using transceiver 810 UE；
By the CSI of the first progress feedback and pass through the CSI of the second progress feedback by transceiver UE, wherein logical The CSI for crossing the first progress feedback is that UE is calculated based on the first pilot signal measurement；By the CSI of the second progress feedback, It is that UE is obtained based on the first pilot signal and the common survey calculation of the second pilot signal.
Processor 800, is also used to:
The second pilot signal is sent extremely by the second pilot resources in advance for user equipment (UE) configuration using transceiver 810 UE；
By the CSI of the first progress feedback and pass through the CSI of the second progress feedback by transceiver UE, wherein logical The CSI for crossing the first progress feedback is that UE is obtained based on the first pilot signal and the common survey calculation of the second pilot signal；Pass through The CSI of second progress feedback is that UE is obtained based on the first pilot signal and the common survey calculation of the second pilot signal.
Wherein, in fig. 8, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 800 The various circuits for the memory that the one or more processors and memory 820 of representative represent link together.Bus architecture is also Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 810 can To be multiple element, that is, includes transmitter and transceiver, the list for communicating over a transmission medium with various other devices is provided Member.Processor 800, which is responsible for management bus architecture and common processing, memory 820, can store processor 800 and is executing operation When used data.
In user equipment side, a kind of feedback device of channel state information CSI provided in an embodiment of the present invention, such as Fig. 9 institute Show, comprising: resource determination unit 902 is first of the user equipment (UE) configuration where the device for determining network side in advance Pilot resources, the first process and the second process；Measuring unit 904 is connected to the resource determination unit 902, at least base The first CSI and the 2nd CSI is calculated by the first pilot signal measurement that first pilot resources are sent in network side；Instead Present unit 906, be connected to the resource determination unit 902 and the measuring unit 904, for by first process by institute The first CSI feedback is stated to network side, and by second process by second CSI feedback to network side.
In device provided in an embodiment of the present invention, the UE where the device is at least based on the first pilot signal measurement and calculates To CSI and the 2nd CSI, the first CSI and the 2nd CSI are at least based on the first pilot signal measurement and are calculated, and tie up from two Degree reflects the channel state information of the first pilot signal, such as: horizontal dimensions and vertical dimensions reflect 3D-MIMO figuration Overall channel status information afterwards, so that base station may be directly applied to 3D-MIMO's after the CSI for receiving UE feedback Figuration, compared with the mode that UE in the prior art is reported based on code book, UE by pilot signal measurement be calculated first into Journey and the second progress feedback CSI, reduce the processing difficulty of UE.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the day of first pilot resources Line port number is N, and the corresponding antenna port quantity of the first CSI is N1, the corresponding antenna port quantity of the 2nd CSI For N2, and the product of N1 and N2 is equal to N.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the resource determination unit 902 is also For: determine network side in advance and be the second pilot resources of the UE configuration where the device；The measuring unit 904 is specific to use In: the first CSI is calculated based on first pilot signal measurement；Pass through institute based on first pilot signal and network side The common survey calculation of the second pilot signal for stating the transmission of the second pilot resources obtains the 2nd CSI.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the resource determination unit 902 is also For: determine network side in advance and be the second pilot resources of the UE configuration where the device；The measuring unit 904 is specific to use In: it is measured jointly based on first pilot signal and network side by the second pilot signal that second pilot resources are sent The first CSI is calculated；It is led based on first pilot signal and network side by the second of second pilot resources transmission The common survey calculation of frequency signal obtains the 2nd CSI.
In a kind of possible embodiment, in device provided in an embodiment of the present invention, the day of first pilot resources Line port number is equal to the corresponding antenna port quantity of the first CSI, the antenna port quantity etc. of second pilot resources In the corresponding antenna port quantity of the 2nd CSI.
In embodiments of the present invention, which can be a part of UE, be also possible to UE or other terminal devices, In, resource determination unit 902 can use signal receiver or receiver, and measuring unit 904 can use at single-chip microcontroller or CPU Device is managed, feedback unit 906 can use signal projector or transmitter.
Referring to Figure 10, the feedback device of another CSI of the side UE provided in an embodiment of the present invention includes:
Processor 100 executes following process for reading the program in memory 120:
Determine network side in advance and be the first pilot resources, the first process and the second process of device configuration；
At least based on network side by the first pilot signal measurement that the first pilot resources are sent be calculated the first CSI and 2nd CSI；
By transceiver 110 by the first CSI feedback to network side, and by the second CSI feedback to network side.
Transceiver 110, for sending and receiving data under the control of processor 100.
Processor 100 is also used to:
Determine network side in advance and be the second pilot resources of device configuration；
The first CSI is calculated based on the first pilot signal measurement；Pass through second based on the first pilot signal and network side The common survey calculation of the second pilot signal that pilot resources are sent obtains the 2nd CSI；
By transceiver 110 by the first CSI feedback to network side, and by the second CSI feedback to network side.
Processor 100 is also used to:
Determine network side in advance and be the second pilot resources of device configuration；
Pass through the common meter of the second pilot signal that the second pilot resources are sent based on the first pilot signal and network side Calculation obtains the first CSI；The second pilot signal sent based on the first pilot signal and network side by the second pilot resources is common Survey calculation obtains the 2nd CSI；
By transceiver 110 by the first CSI feedback to network side, and by the second CSI feedback to network side.
Wherein, in Figure 10, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor The various circuits for the memory that 100 one or more processors represented and memory 120 represent link together.Bus architecture Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can also be linked together, these It is all it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 110 It can be multiple element, that is, include transmitter and receiver, provide for over a transmission medium being communicated with various other devices Unit.For different user equipmenies, user interface 130, which can also be, external the interface for needing equipment is inscribed, connection Equipment includes but is not limited to keypad, display, loudspeaker, microphone, control stick etc..
Processor 100, which is responsible for management bus architecture and common processing, memory 120, can store processor 100 and is holding Used data when row operation.
In conclusion base station receives the CSI that UE passes through the first process and the second progress feedback in the embodiment of the present invention, it is What UE was at least calculated based on the first pilot signal measurement, it should be anti-by the CSI of the first progress feedback and by the second process The CSI of feedback is at least based on the first pilot signal measurement and is calculated, and the channel shape of the first pilot signal is reflected from two dimensions State information, such as: horizontal dimensions and vertical dimensions, the overall channel status information after reflecting 3D-MIMO figuration, so that base station After the CSI for receiving UE feedback, the figuration of 3D-MIMO may be directly applied to, without base station to the CSI received into one Step processing, reduces the processing difficulty of base station, while reducing the processing difficulty of UE.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and 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.
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 (19)

1. a kind of acquisition methods of channel state information CSI characterized by comprising
The first pilot signal is sent to the UE by the first pilot resources in advance for user equipment (UE) configuration；
The CSI that the UE passes through the first progress feedback for UE configuration in advance is received, and by being in advance UE configuration The CSI of second progress feedback, wherein the CSI by the first progress feedback and CSI by second progress feedback, The UE is at least calculated based on first pilot signal measurement；
This method further include: send the second pilot signal to described by the second pilot resources in advance for user equipment (UE) configuration UE；
It wherein, is the UE at least base by the CSI of first progress feedback and by the CSI of second progress feedback It is calculated in first pilot signal measurement, specifically:
By the CSI of first progress feedback, the UE is calculated based on first pilot signal measurement；Pass through The CSI of second progress feedback is that the UE is based on first pilot signal and second pilot signal measures jointly It is calculated；Alternatively,
It is that the UE is based on first pilot signal and second pilot signal by the CSI of first progress feedback What common survey calculation obtained；It is that the UE is based on first pilot signal and institute by the CSI of second progress feedback State what the common survey calculation of the second pilot signal obtained.
2. the method according to claim 1, wherein
The CSI of first progress feedback, comprising: pre-coding matrix instruction PMI information；
The CSI of second progress feedback, comprising: PMI information and channel quality indicator CQI information, wherein the CQI information It is that the PMI information of PMI information and second progress feedback of the UE based on first progress feedback obtains.
3. the method according to claim 1, wherein the CSI of first progress feedback, comprising: PMI information.
4. according to the method described in claim 3, it is characterized in that, the CSI of first progress feedback, further includes: the PMI The corresponding order instruction RI information of information.
5. according to the method described in claim 4, it is characterized in that, the CSI of second progress feedback, comprising: PMI information, The corresponding RI information of the PMI information, and the PMI of the PMI information based on second progress feedback and first progress feedback The CQI information that information obtains.
6. leading to the method according to claim 1, wherein the antenna port quantity of first pilot resources is equal to The corresponding antenna port quantity of CSI of first progress feedback is crossed, the antenna port quantity of second pilot resources is equal to Pass through the corresponding antenna port quantity of the CSI of second progress feedback.
7. the method according to claim 1, wherein the configuration period of first pilot resources is described second L times of the configuration period of pilot resources, wherein L is the positive integer more than or equal to 1.
8. the method according to claim 1, wherein the feedback cycle of the CSI of first progress feedback is institute L times for stating the feedback cycle of the CSI of the second progress feedback, wherein L is the positive integer more than or equal to 1.
9. the method according to claim 1, wherein first pilot resources and second pilot resources, For channel state information reference signals CSI-RS resource or public reference signal CRS resource.
10. a kind of feedback method of channel state information CSI characterized by comprising
User equipment (UE) determines network side in advance and is the first pilot resources, the first process and the second process of UE configuration；
The UE is at least calculated by the first pilot signal measurement that first pilot resources are sent based on network side One CSI and the 2nd CSI；
The UE by first process by first CSI feedback to network side, and will be described by second process Second CSI feedback is to network side；
This method further include: the UE determines network side in advance and be the second pilot resources of UE configuration；
Wherein, the UE is at least calculated based on network side by the first pilot signal measurement that first pilot resources are sent To the first CSI and the 2nd CSI, specifically:
The UE is based on first pilot signal measurement and the first CSI is calculated；The UE is based on first pilot signal The common survey calculation of the second pilot signal sent with network side by second pilot resources obtains the 2nd CSI；Alternatively,
The second pilot signal that the UE is sent based on first pilot signal and network side by second pilot resources Common survey calculation obtains the first CSI；The UE is based on first pilot signal and network side is provided by second pilot tone The common survey calculation of the second pilot signal that source is sent obtains the 2nd CSI.
11. according to the method described in claim 10, it is characterized in that,
First CSI, comprising: pre-coding matrix instruction PMI information；
2nd CSI, comprising: PMI information and channel quality indicator CQI information, wherein the CQI information is the UE base What the PMI information in PMI information and the 2nd CSI in the first CSI obtained.
12. according to the method described in claim 10, it is characterized in that, the first CSI, comprising: PMI information.
13. according to the method for claim 12, which is characterized in that the first CSI, further includes: the PMI information is corresponding Order instruction RI information.
14. according to the method for claim 13, which is characterized in that the 2nd CSI, comprising: PMI information, the PMI information Corresponding RI information, and the CQI letter obtained based on the PMI information in the PMI information and the first CSI in the 2nd CSI Breath.
15. according to the method described in claim 10, it is characterized in that, the antenna port quantity of first pilot resources is equal to The corresponding antenna port quantity of first CSI, the antenna port quantity of second pilot resources are equal to the described 2nd CSI pairs The antenna port quantity answered.
16. a kind of acquisition device of channel state information CSI characterized by comprising
First unit, for sending the first pilot signal to described by the first pilot resources in advance for user equipment (UE) configuration UE；
Second unit is connected to the first unit, anti-by the first process in advance for UE configuration for receiving the UE The CSI of feedback, and by being in advance the CSI of the second progress feedback of UE configuration, wherein pass through first progress feedback CSI and CSI by second progress feedback is that the UE is at least based on first pilot signal measurement and is calculated 's；
The first unit is also used to:
The second pilot signal is sent to the UE by the second pilot resources in advance for user equipment (UE) configuration；
It wherein, is the UE at least base by the CSI of first progress feedback and by the CSI of second progress feedback It is calculated in first pilot signal measurement, specifically:
By the CSI of first progress feedback, the UE is calculated based on first pilot signal measurement；Pass through The CSI of second progress feedback is that the UE is based on first pilot signal and second pilot signal measures jointly It is calculated；Alternatively,
It is that the UE is based on first pilot signal and second pilot signal by the CSI of first progress feedback What common survey calculation obtained；It is that the UE is based on first pilot signal and institute by the CSI of second progress feedback State what the common survey calculation of the second pilot signal obtained.
17. device according to claim 16, which is characterized in that the antenna port quantity of first pilot resources is equal to Pass through the corresponding antenna port quantity of the CSI of first progress feedback, the antenna port quantity etc. of second pilot resources In the corresponding antenna port quantity of CSI by second progress feedback.
18. a kind of feedback device of channel state information CSI characterized by comprising
Resource determination unit is the first pilot tone money of the user equipment (UE) configuration where the device for determining network side in advance Source, the first process and the second process；
Measuring unit is connected to the resource determination unit, at least being sent out based on network side by first pilot resources The first CSI and the 2nd CSI is calculated in the first pilot signal measurement sent；
Feedback unit is connected to the resource determination unit and the measuring unit, and being used for will be described by first process First CSI feedback is to network side, and by second process by second CSI feedback to network side；
The resource determination unit is also used to: determining network side in advance and be the second pilot resources of the UE configuration where the device；
Wherein, the measuring unit, is specifically used for:
The first CSI is calculated based on first pilot signal measurement；Passed through based on first pilot signal and network side The common survey calculation of the second pilot signal that second pilot resources are sent obtains the 2nd CSI；Alternatively,
It is surveyed jointly based on first pilot signal and network side by the second pilot signal that second pilot resources are sent The first CSI is calculated in amount；Pass through second that second pilot resources are sent based on first pilot signal and network side The common survey calculation of pilot signal obtains the 2nd CSI.
19. device according to claim 18, which is characterized in that the antenna port quantity of first pilot resources is equal to described The corresponding antenna port quantity of first CSI, it is corresponding that the antenna port quantity of second pilot resources is equal to the 2nd CSI Antenna port quantity.
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