CN104753646A - CSI (Channel Status Indicator) feedback method and device for active antenna system - Google Patents
CSI (Channel Status Indicator) feedback method and device for active antenna system Download PDFInfo
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- CN104753646A CN104753646A CN201310738103.3A CN201310738103A CN104753646A CN 104753646 A CN104753646 A CN 104753646A CN 201310738103 A CN201310738103 A CN 201310738103A CN 104753646 A CN104753646 A CN 104753646A
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Abstract
The invention provides a CSI (Channel Status Indicator) measurement and feedback method specific to the problem of high air interface overhead needed by CSI feedback of an AAS (Active Antenna System). In one embodiment, UE (User Equipment) receives a first reference signal to obtain an API, and receives a second reference signal to obtain an RI (Rank Indicator) and a PMI (Precoding Matrix Indicator); and the calculation of a corresponding CQI (Channel Quality Indicator) is based on the inclination angle of an antenna port indicated by the API and a precoding matrix indicated by the PMI in a base station. Through adoption of the CSI measurement and feedback method, the air interface feedback overhead is reduced, and the overhead of a reference signal needed by downlink measurement is also reduced.
Description
Technical field
The present invention relates to the scheme that channel condition information in mobile communication technology field (CSI-ChannelStatus Indicator) feeds back, particularly relate to the descending channel information feedback scheme in the mobile communication system that have employed active antenna system (AAS-Active Antenna System) technology.
Background technology
In traditional third generation partner program (3GPP – 3rd Generation PartnerProject) Long Term Evolution (LTE-Long Term Evolution) system, the CSI feedback of Multiinputoutput (MIMO-Multiple Input Multiple Output) channel is carried out based on the detection of cell reference signals (CRS-Cell Reference Signal) or channel status instruction reference signal (CSI-RS:CSI Reference Signal).Subscriber equipment (UE-User Equipment) obtains CSI by detecting CRS or CSI-RS, described CSI comprises order instruction (RI-Rank Indicator), pre-coding matrix instruction (PMI-Precoding Matrix Indicator), the information such as channel quality instruction (CQI-Channel QualityIndicator).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.Accompanying drawing 1 is the CSI-RS pattern based on normal cyclic prefix (Normal CP-Normal Cyclic Prefix) in an existing LTE system, and one of them lattice is the least resource unit-resource particle (RE-Resource Element) of LTE.The RE of oblique line mark may be used for sending CSI-RS, and the RE of reference numerals is that configuration is to the port index of one group of CSI-RS of 8 of a community antenna ports.LTE system adopts the concept definition RS resource of port: a RS port may be mapped to a physical antenna, is also likely that many physical antennas are by merging the virtual antenna of superposition formation one.
As a kind of new Cellular Networks antenna frame, AAS becomes a study hotspot recently.Compare with passive antenna system (PAS-Passive Antenna System), in AAS, multiple antenna element of an antenna independently can adjust phase place, thus the inclination angle of the adjustment antenna of electronics, form more effective MPS process.
The problem that AAS faces is that how feeding back downlink CSI makes base station to obtain descending channel information to UE, compares with traditional PAS, and base station needs the CSI obtained to become three-dimensional from bidimensional, thus may cause rolling up of feedback information spending.Accordingly, the downlink reference signal measured for CSI in AAS also rolls up possibly.
In addition, the distribution of the antenna element of AAS is bidimensional, and its concrete distribution mode realizes being correlated with, and therefore how designing a kind of general CSI feedback scheme is the problem that AAS needs to solve.
The present invention is directed to the solution that the problems referred to above disclose a kind of CSI feedback.
Summary of the invention
The invention discloses a kind of method in UE, wherein, comprise the steps:
A. receive the first reference signal, the first reference signal comprises the reference signal of M antenna port
B. send the first signaling and report API, described API is the index of 1 antenna port selected from the first reference signal
C. receive the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
D. report the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-Reference Signal Received Power (RSRP-Reference Signal Received Power)
-Reference Signal Received Quality (RSRQ-Reference Signal ReceivedQuality).
By the antenna port that API indicates the quality of reception best, the inclination angle making eNB obtain corresponding port has good covering to described UE, avoids and directly feeds back obliquity information (adopting the mode of such as similar PMI) by UE.A defect of direct feedback obliquity information is the distribution that the form of described obliquity information may be limited to antenna element, thus is difficult to the codebook space obtaining general reaction obliquity information.There is not strict precedence relationship in above-mentioned steps B and step C, is to realize being correlated with.
As an embodiment, the first signaling is high-level signaling.
Adopt high-level signaling feedback API to reduce feedback overhead, consider that the height change of UE is general comparatively slow, high-level signaling can satisfy the demands.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
E. report CQI, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, also comprise the steps: before described step e
E0. determine second quality of reception, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, and described specific antenna port is pre-determining
E1. basis is corrected the SINR of the second later reference signal of factor correction and supposes that the pre-coding matrix that the second reference signal adopts described PMI to indicate determines described CQI
Wherein, described modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the quality of reception of the antenna port that described API indicates.
As an embodiment, described specific antenna port is the antenna port that in N number of antenna port of the second reference signal, index is minimum.As another embodiment, described specific antenna port is the antenna port that in N number of antenna port of the second reference signal, index is maximum.
Above-mentioned aspect of the present invention is based on following hypothesis: when the aerial array of base station adopts different antennae inclination angle, and its correlation in the horizontal direction remains unchanged.The spatial coherence of channel is stronger, and described hypothesis is more true to nature, and for more weak spatial coherence channel, the gain of feedback API and CSI is limited.Therefore the design principle of CSI feedback should be do for strong spatial coherence channel to optimize.
Concrete, according to an aspect of the present invention, it is characterized in that, first quality of reception meets one of at least following:
-exceed the quality of reception at least the first power threshold of every other antenna port in a described M antenna port
-in very first time window, exceed the quality of reception of every other antenna port in a described M antenna port
Wherein, the first power threshold is configurable or predefined, and very first time window is configurable or predefined.
Above-mentioned aspect of the present invention avoids API feedback frequently and causes base station frequently to adjust inclination angle.
Concrete, according to an aspect of the present invention, it is characterized in that, the first reference signal adopts the pattern of CSI-RS in subframe, and the second reference signal adopts the pattern of CSI-RS in subframe.
First reference signal adopts the pattern of CSI-RS, keeps good compatibility.
The invention discloses a kind of method in base station, wherein, comprise the steps:
A. send the first reference signal, the first reference signal comprises the reference signal of M antenna port
B. receive the first signaling and obtain the index that API, described API are 1 antenna ports selected from the first reference signal
C. send the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
D. receive the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
There is not strict precedence relationship in above-mentioned steps B and step C.As an embodiment, step B and step C periodically carries out.
As an embodiment, the first signaling is high-level signaling.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
E. receive CQI, described CQI be based on described base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
Concrete, according to an aspect of the present invention, it is characterized in that, the specific antenna port of a described M antenna port and the second reference signal is mapped to identical physical antenna, and described specific antenna port is pre-determining.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, described physical antenna have employed different antenna tilts at a described M antenna port.
Concrete, according to an aspect of the present invention, it is characterized in that, first quality of reception meets one of at least following:
-exceed the quality of reception at least the first power threshold of every other antenna port in a described M antenna port
-in very first time window, exceed the quality of reception of every other antenna port in a described M antenna port
Wherein, the first power threshold is configurable or predefined, and very first time window is configurable or predefined.
Concrete, according to an aspect of the present invention, it is characterized in that, the first reference signal adopts the pattern of CSI-RS in subframe, and the second reference signal adopts the pattern of CSI-RS in subframe.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: receive the first reference signal, the first reference signal comprises the reference signal of M antenna port
Second module: report API for sending the first signaling, described API is the index of 1 antenna port selected from the first reference signal
3rd module: for receiving the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
Four module: for reporting the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
As an embodiment, the said equipment also comprises:
5th module: for determining second quality of reception, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, and described specific antenna port is pre-determining
6th module: be corrected the SINR of the second later reference signal of factor correction for basis and suppose that the pre-coding matrix that the second reference signal adopts described PMI to indicate determines CQI
7th module: for reporting described CQI, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
Wherein, described modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the quality of reception of the antenna port that described API indicates.
The invention discloses a kind of system equipment, it is characterized in that, this equipment comprises:
First module: for sending the first reference signal, the first reference signal comprises the reference signal of M antenna port
Second module: obtain the index that API, described API are 1 antenna ports selected from the first reference signal for receiving the first signaling
3rd module: for sending the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
Four module: for receiving the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
As an embodiment, the said equipment also comprises:
5th module: for receiving CQI, described CQI be based on described base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
For AAS CSI feedback needed for empty overhead this problem higher, the invention provides a kind of CSI measure and feedback method.In one embodiment, UE receives the first reference signal and obtains API, and the calculating receiving the second reference signal acquisition RI and PMI, corresponding CQI have employed the inclination angle of the antenna port of API instruction and the pre-coding matrix of described PMI instruction based on base station.The present invention reduces feedback overhead of eating dishes without rice or wine, reduce the expense of the reference signal required for down-run survey simultaneously.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows an example of the CSI-RS pattern of existing LTE system;
Fig. 2 shows the first reference signal according to an embodiment of the invention and the schematic diagram of the second reference signal in same subframe;
Fig. 3 shows the first reference signal according to an embodiment of the invention and the schematic diagram of the second reference signal in different subframe;
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 structured flowchart for the processing unit in UE according to an embodiment of the invention;
Fig. 7 shows the structured flowchart for the processing unit in base station according to an embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 is the first reference signal and the schematic diagram of the second reference signal in same subframe, as shown in Figure 2.In accompanying drawing 2, oblique line represents the first reference signal, and backslash represents the second reference signal, and a grid represents a RE.
for UE, first receive the first reference signal, the first reference signal comprises the reference signal of 4 antenna ports, as accompanying drawing 2 bend mark, and wherein numeral port index; Then send the first signaling and report API, described API is the index of 1 antenna port selected from 4 antenna ports of the first reference signal; Then receive the second reference signal, the second reference signal comprises the reference signal of 8 antenna ports, as backslash mark in accompanying drawing 2, and wherein numeral port index; Then report the CSI for the second reference signal, described CSI comprises RI and PMI
for base station, first send the first reference signal, the first reference signal comprises the reference signal of 4 antenna ports, as accompanying drawing 2 bend mark, and wherein numeral port index; Then receive the first signaling and obtain the index that API, described API are 1 antenna ports selected from 4 antenna ports of the first reference signal; Then send the second reference signal, the second reference signal comprises the reference signal of 8 antenna ports, as backslash mark in accompanying drawing 2, and wherein numeral port index; Then receive the CSI for the second reference signal, described CSI comprises RI and PMI
In embodiment 1, the quality of reception of the antenna port of described API instruction is first quality of reception, and first quality of reception is the peak in the quality of reception of the antenna port of the first reference signal, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
In embodiment 1, the first reference signal and the second reference signal have reused one group of CSI-RS respectively.
Embodiment 2
Embodiment 2 is the first reference signal and the schematic diagram of the second reference signal in different subframe, as shown in Figure 3.In accompanying drawing 3, oblique line represents the first reference signal, and backslash represents the second reference signal, and a grid represents a RE.
for UE, first receive the first reference signal, the first reference signal comprises the reference signal of 8 antenna ports, as accompanying drawing 3 bend mark, and wherein numeral port index; Then send the first signaling and report API, described API is the index of 1 antenna port selected from 8 antenna ports of the first reference signal; Then receive the second reference signal, the second reference signal comprises the reference signal of 8 antenna ports, as backslash mark in accompanying drawing 3, and wherein numeral port index; Then report the CSI for the second reference signal, described CSI comprises RI and PMI; Then report CQI again, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine.
for base station, first send the first reference signal, the first reference signal comprises the reference signal of 8 antenna ports, as accompanying drawing 3 bend mark, and wherein numeral port index; Then receive the first signaling and obtain the index that API, described API are 1 antenna ports selected from 8 antenna ports of the first reference signal; Then send the second reference signal, the second reference signal comprises the reference signal of 8 antenna ports, as backslash mark in accompanying drawing 3, and wherein numeral port index; Then receive the CSI for the second reference signal, described CSI comprises RI and PMI; Then receive CQI again, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine.
In embodiment 2, the quality of reception of the antenna port of described API instruction is first quality of reception, and first quality of reception is the peak in the quality of reception of the antenna port of the first reference signal, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
In embodiment 2, the first reference signal and the second reference signal are in subframe 1 and subframe s respectively, and described subframe 1 and described subframe s are continuous subframes or discontinuous subframe.
As a sub-embodiment of embodiment 2, the first reference signal and the second reference signal occupy one group of CSI-RS jointly.
Embodiment 3
Embodiment 3 is measurement and the process of feedback figure of API and CSI, as shown in Figure 4.In accompanying drawing 4, base station D100 is the serving BS of UE D200.
for UE D200, receive the first reference signal in step s 201
wherein
it is the reference signal of the antenna port m of the first reference signal; The second reference signal is received in step S202
wherein
it is the reference signal of the antenna port n of the second reference signal; In step S203, send the first signaling report API, described API be from 0 to M-1 an integer; In step S204, report the CSI for the second reference signal, described CSI comprises RI and PMI.First signaling is high-level signaling.
for base station D100, in step S101, send the first reference signal
wherein
it is the reference signal of the antenna port m of the first reference signal; Send the second reference signal in step s 102
wherein
it is the reference signal of the antenna port n of the second reference signal; Receive in step s 103 first signaling obtain API, described API be from 0 to M-1 an integer; In step S104, receive the CSI for the second reference signal, described CSI comprises RI and PMI.
with
be mapped to identical physical antenna, wherein m=0 ~ M-1.
have employed different antenna tilts, wherein m1, m2 be all from 0 to M-1 integer and m1 ≠ m2.
In embodiment 3, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises RSRP and RSRQ.First quality of reception meets one of at least following:
-exceed the quality of reception at least the first power threshold of every other antenna port in a described M antenna port
-in very first time window, exceed the quality of reception of every other antenna port in a described M antenna port
Wherein, the first power threshold is configurable, and very 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 accompanying drawing 5, base station D300 is the serving BS of UE D400.
for UE D400, in step S401, determine second quality of reception, second quality of reception is the quality of reception of the specific antenna port of the second reference signal from base station D300, and described specific antenna port is the antenna port that in the second reference signal, antenna port index is maximum; In step S402, according to the SINR being corrected the second later reference signal of factor correction and hypothesis second reference signal adopts the PMI(of UE D400 feedback see embodiment 3) pre-coding matrix that indicates determines described CQI; In step S403, report described CQI.
Wherein, described modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is that the API(that feeds back of UE D400 is see embodiment 3) quality of reception of antenna port that indicates.
The detailed implementation method of step S402 is as follows: receive the second reference signal according to prior art and suppose base station D300 have employed UE D400 feed back PMI determine that SINR(the one SINR is through the rear SINR of receiver process, the unit of the one SINR is linear value), one SINR is multiplied by described modifying factor and obtains a revised SINR, and tabling look-up to map for a described revised SINR obtains described CQI.
for base station D300, in step S301, receive described CQI.
In embodiment 4, the first reference signal adopts the pattern of CSI-RS in subframe, and the second reference signal adopts the pattern of CSI-RS in subframe.
Embodiment 5
Embodiment 5 is structured flowcharts of the processing unit in UE, as shown in Figure 6.In accompanying drawing 6, UE device 500 is by receiver module 501, and sending module 502, receiver module 503, sending module 504, sending module 505 forms.
Receiver module 501 is for receiving the first reference signal, and the first reference signal comprises the reference signal of M antenna port
Sending module 502 reports API for sending the first signaling, and described API is the index of 1 antenna port selected from the first reference signal
Receiver module 503 is for receiving the second reference signal, and the second reference signal comprises the reference signal of N number of antenna port
Sending module 504 is for reporting the CSI for the second reference signal, and described CSI at least comprises RI and PMI
Sending module 505 for reporting described CQI, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
In embodiment 5, first signaling is high-level signaling, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
Embodiment 6
Embodiment 6 is structured flowcharts of the processing unit in base station, as shown in Figure 7.In accompanying drawing 7, base station apparatus 600 is by sending module 601, and receiver module 602, sending module 603, receiver module 604, receiver module 605 forms.
Sending module 601 is for sending the first reference signal, and the first reference signal comprises the reference signal of M antenna port
Receiver module 602 obtains for receiving the first signaling the index that API, described API are 1 antenna ports selected from the first reference signal
Sending module 603 is for sending the second reference signal, and the second reference signal comprises the reference signal of N number of antenna port
Receiver module 604 is for receiving the CSI for the second reference signal, and described CSI at least comprises RI and PMI
Receiver module 605 for receiving CQI, described CQI be based on described base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (17)
1. the method in UE, wherein, comprises the steps:
A. receive the first reference signal, the first reference signal comprises the reference signal of M antenna port
B. send the first signaling and report API, described API is the index of 1 antenna port selected from the first reference signal
C. receive the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
D. report the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
2. method according to claim 1, is characterized in that, also comprises the steps:
E. report CQI, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine.
3. method according to claim 2, is characterized in that, also comprises the steps: before described step e
E0. determine second quality of reception, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, and described specific antenna port is pre-determining
E1. basis is corrected the SINR of the second later reference signal of factor correction and supposes that the pre-coding matrix that the second reference signal adopts described PMI to indicate determines described CQI
Wherein, described modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the quality of reception of the antenna port that described API indicates.
4. method according to claim 1, is characterized in that, first quality of reception meets one of at least following:
-exceed the quality of reception at least the first power threshold of every other antenna port in a described M antenna port
-in very first time window, exceed the quality of reception of every other antenna port in a described M antenna port
Wherein, the first power threshold is configurable or predefined, and very first time window is configurable or predefined.
5. method according to claim 1, is characterized in that, the first reference signal adopts the pattern of CSI-RS in subframe, and the second reference signal adopts the pattern of CSI-RS in subframe.
6. method according to claim 1, is characterized in that, the first signaling is high-level signaling.
7. the method in base station, wherein, comprises the steps:
A. send the first reference signal, the first reference signal comprises the reference signal of M antenna port
B. receive the first signaling and obtain the index that API, described API are 1 antenna ports selected from the first reference signal
C. send the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
D. receive the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
8. method according to claim 7, is characterized in that, also comprises the steps:
E. receive CQI, described CQI be based on described base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine.
9. method according to claim 7, is characterized in that, the specific antenna port of a described M antenna port and the second reference signal is mapped to identical physical antenna, and described specific antenna port is pre-determining.
10. method according to claim 9, is characterized in that, described physical antenna have employed different antenna tilts at a described M antenna port.
11. methods according to claim 7, is characterized in that, first quality of reception meets one of at least following:
-exceed the quality of reception at least the first power threshold of every other antenna port in a described M antenna port
-in very first time window, exceed the quality of reception of every other antenna port in a described M antenna port
Wherein, the first power threshold is configurable or predefined, and very first time window is configurable or predefined.
12. methods according to claim 7, it is characterized in that, the first reference signal adopts the pattern of CSI-RS in subframe, the second reference signal adopts the pattern of CSI-RS in subframe.
13. methods according to claim 7, is characterized in that, the first signaling is high-level signaling.
14. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: for receiving the first reference signal, the first reference signal comprises the reference signal of M antenna port
Second module: report API for sending the first signaling, described API is the index of 1 antenna port selected from the first reference signal
3rd module: for receiving the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
Four module: for reporting the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
15. equipment according to claim 14, is characterized in that, this equipment also comprises:
5th module: for determining second quality of reception, second quality of reception is the quality of reception of the specific antenna port of the second reference signal, and described specific antenna port is pre-determining
6th module: be corrected the SINR of the second later reference signal of factor correction for basis and suppose that the pre-coding matrix that the second reference signal adopts described PMI to indicate determines CQI
7th module: for reporting described CQI, described CQI be based on base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine
Wherein, described modifying factor is the business of first quality of reception divided by second quality of reception, and first quality of reception is the quality of reception of the antenna port that described API indicates.
16. 1 kinds of system equipments, is characterized in that, this equipment comprises:
First module: for sending the first reference signal, the first reference signal comprises the reference signal of M antenna port
Second module: obtain the index that API, described API are 1 antenna ports selected from the first reference signal for receiving the first signaling
3rd module: for sending the second reference signal, the second reference signal comprises the reference signal of N number of antenna port
Four module: for receiving the CSI for the second reference signal, described CSI at least comprises RI and PMI
Wherein, described M be greater than 1 positive integer, described N be greater than 1 positive integer, the quality of reception of the antenna port of described API instruction is first quality of reception, first quality of reception is the peak in the quality of reception of a described M antenna port, and the described quality of reception comprises one of at least following:
-RSRP
-RSRQ。
17. equipment according to claim 16, is characterized in that, equipment of going back also comprises:
5th module: for receiving CQI, described CQI be based on described base station have employed described API indicate antenna port corresponding to antenna tilt and described PMI indicate pre-coding matrix and determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310738103.3A CN104753646B (en) | 2013-12-27 | 2013-12-27 | A kind of CSI feedback method and apparatus of active antenna system |
Applications Claiming Priority (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017045571A1 (en) * | 2015-09-17 | 2017-03-23 | 中兴通讯股份有限公司 | Reference signal transmission method and device, receiving method and device |
| CN108023616A (en) * | 2016-11-01 | 2018-05-11 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in UE for multiaerial system, base station |
| WO2018137486A1 (en) * | 2017-01-26 | 2018-08-02 | 华为技术有限公司 | Codebook feedback method and apparatus |
| CN110401516A (en) * | 2018-04-24 | 2019-11-01 | 上海朗帛通信技术有限公司 | A kind of first node that be used to wirelessly communicate, the method and apparatus in base station |
| WO2020001433A1 (en) * | 2018-06-29 | 2020-01-02 | 上海朗帛通信技术有限公司 | Method and apparatus in user equipment and base station used for wireless communication |
| CN111565410A (en) * | 2019-02-13 | 2020-08-21 | 华为技术有限公司 | Wireless signal quality evaluation method, electronic equipment and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070201566A1 (en) * | 2006-02-28 | 2007-08-30 | Solomon Trainin B | Techniques for explicit feedback delay measurement |
| CN102821393A (en) * | 2011-06-09 | 2012-12-12 | 华为技术有限公司 | Method and device for processing inter-cell interference |
| US20120322492A1 (en) * | 2010-02-26 | 2012-12-20 | Lg Electronics Inc. | Method for transceiving a signal, and base station and user equipment for same |
| 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 |
-
2013
- 2013-12-27 CN CN201310738103.3A patent/CN104753646B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070201566A1 (en) * | 2006-02-28 | 2007-08-30 | Solomon Trainin B | Techniques for explicit feedback delay measurement |
| US20120322492A1 (en) * | 2010-02-26 | 2012-12-20 | Lg Electronics Inc. | Method for transceiving a signal, and base station and user equipment for same |
| CN102821393A (en) * | 2011-06-09 | 2012-12-12 | 华为技术有限公司 | Method and device for processing inter-cell interference |
| 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 |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017045571A1 (en) * | 2015-09-17 | 2017-03-23 | 中兴通讯股份有限公司 | Reference signal transmission method and device, receiving method and device |
| CN108023616A (en) * | 2016-11-01 | 2018-05-11 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in UE for multiaerial system, base station |
| 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 |
| US11063727B2 (en) | 2016-11-01 | 2021-07-13 | Shanghai Langbo Communication Technology Company Limited | Method and device in UE and base station for multi-antenna system |
| WO2018137486A1 (en) * | 2017-01-26 | 2018-08-02 | 华为技术有限公司 | Codebook feedback method and apparatus |
| US11196501B2 (en) | 2017-01-26 | 2021-12-07 | Huawei Technologies Co., Ltd. | Codebook feedback method and apparatus |
| CN110401516A (en) * | 2018-04-24 | 2019-11-01 | 上海朗帛通信技术有限公司 | A kind of first node that be used to wirelessly communicate, the method and apparatus in base station |
| 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 |
| WO2020001433A1 (en) * | 2018-06-29 | 2020-01-02 | 上海朗帛通信技术有限公司 | Method and apparatus in user equipment and base station used for wireless communication |
| US11128364B2 (en) | 2018-06-29 | 2021-09-21 | Shanghai Langbo Communication Technology Company Limited | Method and device for wireless communication in UE and base station |
| CN111565410A (en) * | 2019-02-13 | 2020-08-21 | 华为技术有限公司 | Wireless signal quality evaluation method, electronic equipment and system |
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