CN104753646B - A kind of CSI feedback method and apparatus of active antenna system - Google Patents
A kind of CSI feedback method and apparatus of active antenna system Download PDFInfo
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- CN104753646B CN104753646B CN201310738103.3A CN201310738103A CN104753646B CN 104753646 B CN104753646 B CN 104753646B CN 201310738103 A CN201310738103 A CN 201310738103A CN 104753646 B CN104753646 B CN 104753646B
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Abstract
For this higher problem of the empty overhead needed for the CSI feedback of AAS, the present invention provides a kind of CSI measurements and feedback method.In one embodiment, UE receives the first reference signal and obtains API, receives the second reference signal and obtains RI and PMI, the calculating of corresponding CQI employs the inclination angle of the antenna port of API instructions and the pre-coding matrix of PMI instructions based on base station.The present invention reduces feedback overhead of eating dishes without rice or wine, while reduce the expense that downlink measures required reference signal.
Description
Technical field
The present invention relates to channel condition information in mobile communication technology field（CSI-Channel Status
Indicator）The scheme of feedback, more particularly to employing active antenna system（AAS-Active Antenna System）
Descending channel information feedback scheme in the mobile communication system of technology.
Background technology
Traditional third generation cooperative partner program（3GPP–3rd Generation Partner Project）Long Term Evolution
（LTE-Long Term Evolution）In system, Multiinputoutput（MIMO-Multiple Input Multiple
Output）The CSI feedback of channel is to be based on cell reference signals（CRS-Cell Reference Signal）Or channel status
Indicate reference signal（CSI-RS：CSI Reference Signal）Detection carry out.User equipment（UE-User
Equipment）CSI is obtained by detecting CRS or CSI-RS, the CSI includes order instruction（RI-Rank Indicator）,
Pre-coding matrix instruction（PMI-Precoding Matrix Indicator）, channel quality instruction（CQI-Channel
Quality Indicator）Etc. information.The CSI that system side is fed back by UE obtains MIMO downlink channel characteristics.
LTE defines 3 kinds of CSI-RS port numbers：2,4,8.Attached drawing 1 is that normal circulation is based in an existing LTE system
Prefix（Normal CP-Normal Cyclic Prefix）CSI-RS patterns, one of lattice is the most petty bourgeoisie of LTE
Source unit-resource particle（RE-Resource Element）.The RE of oblique line mark can be used for sending CSI-RS, reference numerals
RE be 8 antenna ports for being allocated to a cell one group of CSI-RS resource port index.LTE system is using port
Concept definition RS resources：One RS port may be mapped to a physical antenna, it is also possible to be that more physical antennas pass through conjunction
And it is superimposed and forms a virtual antenna.
As a kind of new Cellular Networks antenna frame, AAS becomes a research hotspot recently.With passive antenna system
（PAS-Passive Antenna System）Compare, in AAS mutiple antennas a period of time of an antenna can independent adjustment phase place,
So as to the inclination angle of the adjustment antenna of electronics, more effective MPS process is formed.
It is that how feeding back downlink CSI enables base station to obtain descending channel information to UE that AAS, which is suffered from a problem that, and
Traditional PAS is compared, and the CSI that base station needs to obtain becomes three-dimensional from bidimensional, thus may cause the big of feedback information spending
Amount increase.Correspondingly, it may also roll up for the downlink reference signals measured of CSI in AAS.
In addition, the distribution of the antenna element of AAS is bidimensional, its specific distribution mode be realize it is relevant, therefore how
It is the problem that AAS needs to solve to design a kind of general CSI feedback scheme.
The present invention discloses a kind of solution of CSI feedback regarding to the issue above.
The content of the invention
The invention discloses a kind of method in UE, wherein, include the following steps：
A. the first reference signal is received, the first reference signal includes the reference signal of M antenna port
B. the rope that the first signaling reports API, the API to be 1 antenna ports selected from the first reference signal is sent
Draw
C. the second reference signal is received, the second reference signal includes the reference signal of N number of antenna port
D. the CSI for the second reference signal, the CSI is reported to include at least RI and PMI
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna port of the API instructions
The quality of reception be first quality of reception, first quality of reception is the peak in the quality of reception of the M antenna port, institute
State the quality of reception and include at least one：
- Reference Signal Received Power（RSRP-Reference Signal Received Power）
- Reference Signal Received Quality（RSRQ-Reference Signal Received Quality）.
The best antenna port of the quality of reception is indicated by API so that the inclination angle that eNB obtains corresponding port has the UE
There is preferable covering, avoid and obliquity information is directly fed back by UE（By the way of for example similar to PMI）.Directly feed back inclination angle letter
One defect of breath is that the form of the obliquity information may be limited to the distribution of antenna element, so as to hardly result in general anti-
Answer the codebook space of obliquity information.Simultaneously stringent precedence relationship is not present in above-mentioned steps B and step C, be realize it is relevant.
As one embodiment, the first signaling is high-level signaling.
Feedback overhead is reduced using high-level signaling feedback API, it is contemplated that the height change of UE is generally slower, high-level signaling
It disclosure satisfy that demand.
Specifically, according to an aspect of the present invention, it is characterised in that further include following steps：
E. it is that the antenna employed based on base station corresponding to the antenna port of the API instructions is inclined to report CQI, the CQI
Angle and the PMI instruction pre-coding matrix and determine
Specifically, above-mentioned aspect according to the present invention, it is characterised in that further include following steps before the step E：
E0. second quality of reception is determined, second quality of reception is the reception matter of the specific antenna port of the second reference signal
Amount, the specific antenna port is pre-determining
E1. according to being corrected, the factor corrects the SINR of the second later reference signal and the second reference signal of hypothesis uses institute
The pre-coding matrix for stating PMI instructions determines the CQI
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is institute
State the quality of reception of the antenna port of API instructions.
As one embodiment, the specific antenna port is to index minimum in N number of antenna port of the second reference signal
Antenna port.As another embodiment, the specific antenna port is indexed in N number of antenna port of the second reference signal
Maximum antenna port.
Aforementioned aspect of the present invention based on the assumption that：When the aerial array of base station uses different antennae inclination angle, it is in water
Square to correlation remain unchanged.The spatial coherence of channel is stronger, and the hypothesis is more true to nature, and for weaker space
Correlation channel, the gain for feeding back API and CSI are limited.Therefore the design principle of CSI feedback should be directed to strong spatial coherence
Channel, which is done, to be optimized.
Specifically, according to an aspect of the present invention, it is characterised in that first quality of reception meets at least one：
- more than the quality of reception at least the first power threshold of every other antenna port in the M antenna port
- in first time window exceed the M antenna port in every other antenna port the quality of reception
Wherein, the first power threshold be it is configurable either it is predefined, first time window be it is configurable or
It is predefined.
Aforementioned aspect of the present invention, which avoids frequent API feedbacks, causes base station frequently to adjust inclination angle.
Specifically, according to an aspect of the present invention, it is characterised in that the first reference signal uses CSI-RS in subframe
Pattern, the second reference signal in subframe use CSI-RS pattern.
First reference signal uses the pattern of CSI-RS, keeps good compatibility.
The invention discloses a kind of method in base station, wherein, include the following steps：
A. the first reference signal is sent, the first reference signal includes the reference signal of M antenna port
B. receive the first signaling and obtain API, the API is the rope of 1 antenna port selected from the first reference signal
Draw
C. the second reference signal is sent, the second reference signal includes the reference signal of N number of antenna port
D. the CSI for the second reference signal is received, the CSI includes at least RI and PMI
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna port of the API instructions
The quality of reception be first quality of reception, first quality of reception is the peak in the quality of reception of the M antenna port, institute
State the quality of reception and include at least one：
-RSRP
-RSRQ。
Stringent precedence relationship is not present in above-mentioned steps B and step C.As one embodiment, step B and step C are
Periodically carry out.
As one embodiment, the first signaling is high-level signaling.
Specifically, according to an aspect of the present invention, it is characterised in that further include following steps：
E. CQI is received, the CQI is the day employed based on the base station corresponding to the antenna port of the API instructions
Line inclination angle and the PMI instruction pre-coding matrix and determine
Specifically, according to an aspect of the present invention, it is characterised in that the M antenna port and the second reference signal
Specific antenna port be mapped to identical physical antenna, the specific antenna port is pre-determining.
Specifically, above-mentioned aspect according to the present invention, it is characterised in that the physical antenna is in the M antenna port
Employ different antenna tilts.
Specifically, according to an aspect of the present invention, it is characterised in that first quality of reception meets at least one：
- more than the quality of reception at least the first power threshold of every other antenna port in the M antenna port
- in first time window exceed the M antenna port in every other antenna port the quality of reception
Wherein, the first power threshold be it is configurable either it is predefined, first time window be it is configurable or
It is predefined.
Specifically, according to an aspect of the present invention, it is characterised in that the first reference signal uses CSI-RS in subframe
Pattern, the second reference signal in subframe use CSI-RS pattern.
The invention discloses a kind of user equipment, it is characterised in that the equipment includes：
First module：The first reference signal is received, the first reference signal includes the reference signal of M antenna port
Second module：It is 1 day being selected from the first reference signal for sending the first signaling to report API, the API
The index of line end mouth
3rd module：For receiving the second reference signal, the second reference signal includes the reference signal of N number of antenna port
4th module：The CSI of the second reference signal is directed to for reporting, the CSI includes at least RI and PMI
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna port of the API instructions
The quality of reception be first quality of reception, first quality of reception is the peak in the quality of reception of the M antenna port, institute
State the quality of reception and include at least one：
-RSRP
-RSRQ。
As one embodiment, the said equipment further includes：
5th module：For determining second quality of reception, second quality of reception is the certain day line end of the second reference signal
The quality of reception of mouth, the specific antenna port is pre-determining
6th module：For according to being corrected, the factor to correct the SINR of the second later reference signal and hypothesis second refers to
Signal determines CQI using the pre-coding matrix of PMI instructions
7th module：It is antenna port that API instruction is employed based on base station for reporting the CQI, the CQI
Corresponding antenna tilt and the PMI instruction pre-coding matrix and determine
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is institute
State the quality of reception of the antenna port of API instructions.
The invention discloses a kind of system equipment, it is characterised in that the equipment includes：
First module：For sending the first reference signal, the first reference signal includes the reference signal of M antenna port
Second module：API is obtained for receiving the first signaling, the API is 1 day selected from the first reference signal
The index of line end mouth
3rd module：For sending the second reference signal, the second reference signal includes the reference signal of N number of antenna port
4th module：For receiving the CSI for the second reference signal, the CSI includes at least RI and PMI
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna port of the API instructions
The quality of reception be first quality of reception, first quality of reception is the peak in the quality of reception of the M antenna port, institute
State the quality of reception and include at least one：
-RSRP
-RSRQ。
As one embodiment, the said equipment further includes：
5th module：For receiving CQI, the CQI is the antenna port that the API instructions are employed based on the base station
Corresponding antenna tilt and the PMI instruction pre-coding matrix and determine
For this higher problem of the empty overhead needed for the CSI feedback of AAS, the present invention provides a kind of CSI measurements
And feedback method.In one embodiment, UE receive the first reference signal obtain API, receive the second reference signal obtain RI and
The calculating of PMI, corresponding CQI employ the inclination angle of the antenna port of API instructions and the precoding square of PMI instructions based on base station
Battle array.The present invention reduces feedback overhead of eating dishes without rice or wine, while reduce the expense that downlink measures required reference signal.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is other
Feature, objects and advantages will become more apparent：
Fig. 1 shows an example of the CSI-RS patterns of existing LTE system；
Fig. 2 shows the first reference signal and the second reference signal according to an embodiment of the invention in same height
Schematic diagram in frame；
Fig. 3 shows the first reference signal and the second reference signal according to an embodiment of the invention in different subframes
Interior schematic diagram；
Fig. 4 shows measurement and the process of feedback figure of API and CSI according to an embodiment of the invention
Fig. 5 shows measurement and the process of feedback figure of CQI according to an embodiment of the invention
Fig. 6 shows the structure diagram of the processing unit according to an embodiment of the invention being used in UE；
Fig. 7 shows the structure diagram of the processing unit according to an embodiment of the invention being used in base station；
Embodiment
Technical scheme is described in further detail below in conjunction with attached drawing, it is necessary to explanation is, do not rushed
In the case of prominent, the feature in embodiments herein and embodiment can be arbitrarily mutually combined.
Embodiment 1
Embodiment 1 is the schematic diagram of the first reference signal and the second reference signal in same subframe, such as the institute of attached drawing 2
Show.In attached drawing 2, oblique line represents the first reference signal, and backslash represents the second reference signal, and a grid represents a RE.
For UE, the first reference signal is received first, and the first reference signal includes the reference signal of 4 antenna ports, such as
2 bend of attached drawing identifies, wherein digital representation port index；Then it is from first to send the first signaling and report API, the API
The index of 1 antenna port selected in 4 antenna ports of reference signal；Then the second reference signal, the second reference are received
Signal includes the reference signal of 8 antenna ports, such as backslash mark, wherein digital representation port index in attached drawing 2；Then on
Report is directed to the CSI of the second reference signal, and the CSI includes RI and PMI
For base station, the first reference signal is sent first, the first reference signal includes the reference signal of 4 antenna ports,
Such as 2 bend of attached drawing mark, wherein digital representation port index；Then receive the first signaling and obtain API, the API is from the
The index of 1 antenna port selected in 4 antenna ports of one reference signal；Then the second reference signal, the second ginseng are sent
Examining signal includes the reference signal of 8 antenna ports, such as backslash mark, wherein digital representation port index in attached drawing 2；Then
The CSI for the second reference signal is received, the CSI includes RI and PMI
In embodiment 1, the quality of reception of the antenna port of API instruction is first quality of reception, first quality of reception
Be the antenna port of the first reference signal the quality of reception in peak, the quality of reception includes at least one：
-RSRP
-RSRQ。
In embodiment 1, the first reference signal and the second reference signal have reused one group of CSI-RS resource respectively.
Embodiment 2
Embodiment 2 is the schematic diagram of the first reference signal and the second reference signal in different subframes, as shown in Figure 3.
In attached drawing 3, oblique line represents the first reference signal, and backslash represents the second reference signal, and a grid represents a RE.
For UE, the first reference signal is received first, and the first reference signal includes the reference signal of 8 antenna ports, such as
3 bend of attached drawing identifies, wherein digital representation port index；Then it is from first to send the first signaling and report API, the API
The index of 1 antenna port selected in 8 antenna ports of reference signal；Then the second reference signal, the second reference are received
Signal includes the reference signal of 8 antenna ports, such as backslash mark, wherein digital representation port index in attached drawing 3；Then on
Report is directed to the CSI of the second reference signal, and the CSI includes RI and PMI；Followed by CQI, the CQI is reported adopted based on base station
Determined with the antenna tilt corresponding to the antenna port of API instructions and the pre-coding matrix of PMI instructions.
For base station, the first reference signal is sent first, the first reference signal includes the reference signal of 8 antenna ports,
Such as 3 bend of attached drawing mark, wherein digital representation port index；Then receive the first signaling and obtain API, the API is from the
The index of 1 antenna port selected in 8 antenna ports of one reference signal；Then the second reference signal, the second ginseng are sent
Examining signal includes the reference signal of 8 antenna ports, such as backslash mark, wherein digital representation port index in attached drawing 3；Then
The CSI for the second reference signal is received, the CSI includes RI and PMI；Followed by CQI is received, the CQI is to be based on base station
Employ the pre-coding matrix of the antenna tilt corresponding to the antenna port of the API instructions and PMI instructions and determine.
In embodiment 2, the quality of reception of the antenna port of API instruction is first quality of reception, first quality of reception
Be the antenna port of the first reference signal the quality of reception in peak, the quality of reception includes at least one：
-RSRP
-RSRQ。
In embodiment 2, the first reference signal and the second reference signal are respectively in subframe 1 and subframe s, the subframe 1
It is continuous subframes either discontinuous subframe with the subframe s.
As a sub- embodiment of embodiment 2, the first reference signal and the second reference signal occupy one group jointly
CSI-RS resource.
Embodiment 3
Embodiment 3 is measurement and the process of feedback figure of API and CSI, as shown in Figure 4.In attached drawing 4, base station D100 is UE
The serving BS of D200.
For UE D200, the first reference signal is received in step s 201Wherein
It is the reference signal of the antenna port m of the first reference signal；The second reference signal is received in step S202WhereinIt is the reference signal of the antenna port n of the second reference signal；In step S203
It is from 0 to an integer M-1 to send the first signaling and report API, the API；Reported in step S204 for second
The CSI of reference signal, the CSI include RI and PMI.First signaling is high-level signaling.
For base station D100, the first reference signal is sent in step S101Wherein
It is the reference signal of the antenna port m of the first reference signal；The second reference signal is sent in step s 102WhereinIt is the reference signal of the antenna port n of the second reference signal；In step s 103
Receive the first signaling and obtain API, the API is from 0 to an integer M-1；Received in step S104 and be directed to second
The CSI of reference signal, the CSI include RI and PMI.
WithIt is mapped to identical physical antenna, wherein m=0~M-1.Different antenna tilts is employed,
Wherein m1, m2 are from 0 to the integer and m1 ≠ m2 M-1.
In embodiment 3, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna of the API instructions
The quality of reception of port is first quality of reception, and first quality of reception is the highest in the quality of reception of the M antenna port
Value, the quality of reception include RSRP and RSRQ.First quality of reception meets at least one：
- more than the quality of reception at least the first power threshold of every other antenna port in the M antenna port
- in first time window exceed the M antenna port in every other antenna port the quality of reception
Wherein, the first power threshold is configurable that first time window is predefined.
Embodiment 4
Embodiment 4 is measurement and the process of feedback figure of CQI, as shown in Figure 5.In attached drawing 5, base station D300 is UE D400
Serving BS.
For UE D400, in step S401, determine second quality of reception, second quality of reception is to come from base station D300
The second reference signal specific antenna port the quality of reception, the specific antenna port is antenna end in the second reference signal
Stomochord draws the antenna port of maximum；In step S402, according to the SINR for being corrected the second later reference signal of factor amendment
And assume that the second reference signal uses the PMI of UE D400 feedbacks（Referring to embodiment 3）The pre-coding matrix of instruction determines described
CQI；In step S403, the CQI is reported.
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is UE
The API of D400 feedbacks（Referring to embodiment 3）The quality of reception of the antenna port of instruction.
The detailed implementation method of step S402 is as follows：Second reference signal is received according to the prior art and assumes base station D300
The PMI for employing UE D400 feedbacks determines the first SINR（First SINR is SINR, the first SINR after receiver processing
Unit be linear value）, the first SINR is multiplied by the modifying factor and obtains revised first SINR, for described revised
First SINR, which tables look-up to map, obtains the CQI.
For base station D300, in step S301, receive the CQI.
In embodiment 4, the first reference signal uses the pattern of CSI-RS in subframe, and the second reference signal is adopted in subframe
With the pattern of CSI-RS.
Embodiment 5
Embodiment 5 is the structure diagram of the processing unit in UE, as shown in Figure 6.In attached drawing 6, UE devices 500 are by receiving
Module 501, sending module 502, receiving module 503, sending module 504, sending module 505 form.
Receiving module 501 is used to receive the first reference signal, and the first reference signal includes the reference signal of M antenna port
It is 1 selected from the first reference signal that sending module 502, which is used to send the first signaling to report API, the API,
The index of antenna port
Receiving module 503 is used to receive the second reference signal, and the second reference signal includes the reference signal of N number of antenna port
Sending module 504 is used to report the CSI for the second reference signal, the CSI to include at least RI and PMI
It is the antenna end that the API instructions are employed based on base station that sending module 505, which is used to report the CQI, the CQI,
Mouthful corresponding to antenna tilt and the PMI instruction pre-coding matrix and determine
In embodiment 5, the first signaling is high-level signaling, and the M is greater than 1 positive integer, the N be greater than 1 it is just whole
Number, the quality of reception of the antenna port of the API instructions is first quality of reception, and first quality of reception is the M antenna end
Peak in the quality of reception of mouth, the quality of reception include at least one：
-RSRP
-RSRQ。
Embodiment 6
Embodiment 6 is the structure diagram of the processing unit in base station, as shown in Figure 7.In attached drawing 7, base station apparatus 600 by
Sending module 601, receiving module 602, sending module 603, receiving module 604, receiving module 605 form.
Sending module 601 is used to send the first reference signal, and the first reference signal includes the reference signal of M antenna port
Receiving module 602 is used to receive the first signaling acquisition API, and the API is 1 selected from the first reference signal
The index of antenna port
Sending module 603 is used to send the second reference signal, and the second reference signal includes the reference signal of N number of antenna port
Receiving module 604 is used to receive the CSI for the second reference signal, and the CSI includes at least RI and PMI
Receiving module 605 is used to receive CQI, and the CQI is the antenna end that the API instructions are employed based on the base station
Mouthful corresponding to antenna tilt and the PMI instruction pre-coding matrix and determine
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, the antenna port of the API instructions
The quality of reception be first quality of reception, first quality of reception is the peak in the quality of reception of the M antenna port, institute
State the quality of reception and include at least one：
-RSRP
-RSRQ。
One of ordinary skill in the art will appreciate that all or part of step in the above method can be referred to by program
Related hardware is made to complete, described program can be stored in computer-readable recording medium, such as read-only storage, hard disk or light
Disk etc..Optionally, all or part of step of above-described embodiment can also be realized using one or more integrated circuit.Phase
Answer, each modular unit in above-described embodiment, example, in hardware can be used to realize, can also be by the form of software function module
Realize, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification for being made, equivalent substitution, improve etc., it should be included in the protection of the present invention
Within the scope of.
Claims (12)
1. a kind of method in UE, wherein, include the following steps：
A. the first reference signal is received, the first reference signal includes the reference signal of M antenna port；
B. the index that the first signaling reports API, the API to be 1 antenna ports selected from the first reference signal is sent；
C. the second reference signal is received, the second reference signal includes the reference signal of N number of antenna port；
D. the CSI for the second reference signal, the CSI is reported to include at least RI and PMI；
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, and the antenna port of the API instructions connects
It is first quality of reception to receive quality, and first quality of reception is the peak in the quality of reception of the M antenna port, described to connect
Receive quality and include at least one：
-RSRP；
-RSRQ；
E. report CQI, the CQI be based on base station employ antenna tilt corresponding to the antenna port of API instruction and
The pre-coding matrix of PMI instruction and determine；
Following steps are further included before the step E：
E0. second quality of reception is determined, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, institute
It is pre-determining to state specific antenna port；
E1. according to being used the SINR and the second reference signal of hypothesis for being corrected the second later reference signal of factor amendment
The pre-coding matrix of PMI instructions determines the CQI；
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the API
The quality of reception of the antenna port of instruction.
2. according to the method described in claim 1, it is characterized in that, first quality of reception meets at least one：
- more than the quality of reception at least the first power threshold of every other antenna port in the M antenna port；
- in first time window exceed the M antenna port in every other antenna port the quality of reception；
Wherein, the first power threshold is configurable either predefined that first time window is configurable either pre-
Definition.
3. according to the method described in claim 1, it is characterized in that, the first reference signal uses the figure of CSI-RS in subframe
Case, the second reference signal use the pattern of CSI-RS in subframe.
4. according to the method described in claim 1, it is characterized in that, the first signaling is high-level signaling.
5. a kind of method in base station, wherein, include the following steps：
A. the first reference signal is sent, the first reference signal includes the reference signal of M antenna port；
B. receive the first signaling and obtain API, the API is the index of 1 antenna port selected from the first reference signal；
C. the second reference signal is sent, the second reference signal includes the reference signal of N number of antenna port；
D. the CSI for the second reference signal is received, the CSI includes at least RI and PMI；
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, and the antenna port of the API instructions connects
It is first quality of reception to receive quality, and first quality of reception is the peak in the quality of reception of the M antenna port, described to connect
Receive quality and include at least one：
-RSRP；
-RSRQ；
E. CQI is received, the CQI is that the antenna employed based on the base station corresponding to the antenna port of the API instructions is inclined
Angle and the PMI instruction pre-coding matrix and determine；
Following steps are further included before the step E：
E0. second quality of reception is determined, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, institute
It is pre-determining to state specific antenna port；
E1. according to being used the SINR and the second reference signal of hypothesis for being corrected the second later reference signal of factor amendment
The pre-coding matrix of PMI instructions determines the CQI；
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the API
The quality of reception of the antenna port of instruction.
6. according to the method described in claim 5, it is characterized in that, the M antenna port and the second reference signal it is specific
Antenna terminal mapping to identical physical antenna, the specific antenna port be pre-determining.
7. according to the method described in claim 6, it is characterized in that, the physical antenna is employed in the M antenna port
Different antenna tilts.
8. according to the method described in claim 5, it is characterized in that, first quality of reception meets at least one：
- in first time window exceed the M antenna port in every other antenna port the quality of reception；
Wherein, the first power threshold is configurable either predefined that first time window is configurable either pre-
Definition.
9. according to the method described in claim 5, it is characterized in that, the first reference signal uses the figure of CSI-RS in subframe
Case, the second reference signal use the pattern of CSI-RS in subframe.
10. according to the method described in claim 5, it is characterized in that, the first signaling is high-level signaling.
11. a kind of user equipment, it is characterised in that the equipment includes：
First module：For receiving the first reference signal, the first reference signal includes the reference signal of M antenna port；
Second module：It is 1 antenna end being selected from the first reference signal for sending the first signaling to report API, the API
The index of mouth；
3rd module：For receiving the second reference signal, the second reference signal includes the reference signal of N number of antenna port；
4th module：The CSI of the second reference signal is directed to for reporting, the CSI includes at least RI and PMI；
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, and the antenna port of the API instructions connects
It is first quality of reception to receive quality, and first quality of reception is the peak in the quality of reception of the M antenna port, described to connect
Receive quality and include at least one：
-RSRP；
-RSRQ；
5th module：For determining second quality of reception, second quality of reception is the specific antenna port of the second reference signal
The quality of reception, the specific antenna port are pre-determining；
6th module：For according to the SINR and the second reference signal of hypothesis for being corrected the second later reference signal of factor amendment
CQI is determined using the PMI pre-coding matrixes indicated；
7th module：For report the CQI, the CQI be employed based on base station API instruction antenna port institute it is right
The antenna tilt answered and the PMI instruction pre-coding matrix and determine；
Wherein, the modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the API
The quality of reception of the antenna port of instruction.
12. a kind of base station equipment, it is characterised in that the equipment includes：
First module：For sending the first reference signal, the first reference signal includes the reference signal of M antenna port；
Second module：API is obtained for receiving the first signaling, the API is 1 antenna end selected from the first reference signal
The index of mouth；
3rd module：For sending the second reference signal, the second reference signal includes the reference signal of N number of antenna port；
4th module：For receiving the CSI for the second reference signal, the CSI includes at least RI and PMI；
Wherein, the M is greater than 1 positive integer, and the N is greater than 1 positive integer, and the antenna port of the API instructions connects
It is first quality of reception to receive quality, and first quality of reception is the peak in the quality of reception of the M antenna port, described to connect
Receive quality and include at least one：
-RSRP；
-RSRQ；
5th module：For receiving CQI, the CQI is to be employed based on base station corresponding to the antenna port of the API instructions
Antenna tilt and the PMI instruction pre-coding matrix and determine；
Wherein, to be user terminal correct the SINR of the second later reference signal and assume the according to being corrected the factor CQI
Two reference signals determine that it is to be based on base that user terminal, which reports the CQI, the CQI, using the pre-coding matrix of PMI instructions
Station employs the pre-coding matrix of the antenna tilt and PMI instructions corresponding to the antenna port of the API instructions and determines；
The modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the API instructions
Antenna port the quality of reception.
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| CN108023616B (en) * | 2016-11-01 | 2020-01-03 | 上海朗帛通信技术有限公司 | Method and device for UE (user equipment) and base station of multi-antenna system |
| CN108365877B (en) * | 2017-01-26 | 2021-06-01 | 华为技术有限公司 | Codebook feedback method and device |
| CN110401516B (en) * | 2018-04-24 | 2021-10-29 | 上海朗帛通信技术有限公司 | Method and device used in first node and base station for wireless communication |
| CN112272414A (en) * | 2018-06-29 | 2021-01-26 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN111565410B (en) * | 2019-02-13 | 2022-04-22 | 华为技术有限公司 | Wireless signal quality evaluation method, electronic equipment and system |
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| WO2013181783A1 (en) * | 2012-06-04 | 2013-12-12 | 华为技术有限公司 | Signal received power measurement method, terminal, base station and system |
| WO2013181850A1 (en) * | 2012-06-08 | 2013-12-12 | Nec(China) Co., Ltd. | Method and apparatus for three-dimensional beamforming |
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| WO2013181783A1 (en) * | 2012-06-04 | 2013-12-12 | 华为技术有限公司 | Signal received power measurement method, terminal, base station and system |
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