CN102438304B - A kind of beam forming gain defining method and equipment - Google Patents
A kind of beam forming gain defining method and equipment Download PDFInfo
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- CN102438304B CN102438304B CN201210017361.8A CN201210017361A CN102438304B CN 102438304 B CN102438304 B CN 102438304B CN 201210017361 A CN201210017361 A CN 201210017361A CN 102438304 B CN102438304 B CN 102438304B
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Abstract
The invention discloses a kind of beam forming gain defining method and equipment, be applied to LTE system, the method comprises: user equipment (UE) determination cell-specific pilot signal reception power C_RSRP and special pilot frequency for user Signal reception power U_RSRP; Is described UE according to parameter
and described C_RSRP and U_RSRP determines beam forming gain.In the present invention, the real gain knowing and monitor current beam figuration is achieved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of beam forming gain defining method and equipment.
Background technology
Beam shaping is a kind of Signal Pretreatment technology based on aerial array, and beam shaping produces the wave beam with directive property by the weight coefficient of each array element in adjustment aerial array, thus can obtain obvious array gain.Beam shaping technology expanding the coverage area, improve in edge throughput and AF panel etc. and have very large advantage.
LTE(LongTermEvolution, Long Term Evolution) also use beam shaping technology in agreement.At PDSCH(PhysicalDownlinkSharedChannel, Physical Downlink Shared Channel) define beamforming transmission scheme based on single port special pilot frequency for user (UE-specificReferenceSignals, hereinafter referred to as URS) in transmission mode 7.UE(UserEquipment, subscriber equipment) need the equivalent channel after utilizing URS to estimate beam shaping to carry out relevant detection.On the other hand, UE needs according to cell-specific pilot tone (Cell-specificReferenceSignals, hereinafter referred to as CRS) measurement pilot signals received power (ReferenceSignalReceivedPower, hereinafter referred to as RSRP), and calculate CQI(ChannelQualityIndicator, CQI), determine to send modulating-coding grade (ModulationandCodingScheme, hereinafter referred to as MCS) for base station.Because CRS is used for the down-run survey of all UE in community, beam shaping can not be carried out.The CRS power that UE receives does not comprise excipient gain, and the measurement result based on CRS also cannot reflect the real channel quality after beam shaping.Base station side needs to make correction for CQI value could determine true MCS grade.
Prior art is not known and is monitored the technical scheme of real gain of current beam figuration.
Summary of the invention
The object of the present invention is to provide a kind of beam forming gain defining method and equipment, to realize the real gain knowing and monitor current beam figuration.
In order to reach above object, the embodiment of the present invention provides a kind of beam forming gain defining method, is applied in LTE system, comprises the following steps:
User equipment (UE) determination cell-specific pilot signal reception power C_RSRP and special pilot frequency for user Signal reception power U_RSRP;
Described UE is according to parameter ρ
aand described C_RSRP and U_RSRP determines beam forming gain; Wherein, described parameter ρ
afor the ratio of Physical Downlink Shared Channel PDSCH every RE energy and the every RE energy of cell-specific pilot tone CRS.
The embodiment of the present invention also provides a kind of user equipment (UE), is applied to LTE system, comprising:
First determination module, for determining cell-specific pilot signal reception power C_RSRP;
Second determination module, for determining special pilot frequency for user Signal reception power U_RSRP;
3rd determination module, for according to described C_RSRP, U_RSRP received power and parameter ρ
adetermine beam forming gain; Wherein, described parameter ρ
afor the ratio of Physical Downlink Shared Channel PDSCH every RE energy and the every RE energy of cell-specific pilot tone CRS.
Compared with prior art, the present invention at least has the following advantages:
The above embodiment of the present invention, subscriber equipment by determining C_RSRP and U_RSRP, thus according to determined C_RSRP, U_RSRP and parameter ρ
adetermine beam forming gain, achieve the real gain knowing and monitor current beam figuration.
Accompanying drawing explanation
The schematic flow sheet of a kind of beam forming gain defining method that Fig. 1 provides for the embodiment of the present invention;
The structural representation of a kind of subscriber equipment that Fig. 2 provides for the embodiment of the present invention.
Embodiment
By theory calculate in prior art, owing to being subject to channel environmental change, the impact of the factors such as DOA estimate is inaccurate, the gain after wave beam forming will lower than calculated value.
For above-mentioned problems of the prior art, embodiments provide the technical scheme that a kind of beam forming gain is determined, be applied in LTE system.In this technical scheme, subscriber equipment is by determining C_RSRP(Cell-specificReferenceSignalReceivedPower, cell-specific pilot received power) and U_RSRP(UE-specificReferenceSignalReceivedPower, special pilot frequency for user received power), thus according to determined C_RSRP, U_RSRP and parameter ρ
adetermine beam forming gain, achieve the real gain knowing and monitor current beam figuration.
Below in conjunction with the accompanying drawing in the application, carry out clear, complete description to the technical scheme in the application, obviously, described embodiment is a part of embodiment of the application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the application's protection.
As shown in Figure 1, be the schematic flow sheet of a kind of beam forming gain defining method that the embodiment of the present invention provides, can comprise the following steps:
Step 101, UE determine cell-specific pilot signal reception power.
Concrete, in embodiments of the present invention, UE can obtain CRS according to CRS resource mapping relation from the downgoing baseband frequency-region signal received, and determines C_RSRP according to the CRS got.Wherein, C_RSRP is agreement specifying measurement item, determines that the specific implementation of C_RSRP is identical with implementation of the prior art according to CRS.
Step 102, UE determine special pilot frequency for user Signal reception power.
Concrete, in embodiments of the present invention, UE can obtain URS according to URS resource mapping relation from the downgoing baseband frequency-region signal received, and determines U_RSRP according to the URS got.Wherein, UE determines the specific implementation (specific algorithm) of U_RSRP according to URS and determines realizing similar (input parameter becomes URS from CRS) of C_RSRP according to CRS.
Step 103, UE are according to parameter ρ
a, C_RSRP and U_RSRP determine beam forming gain.
Concrete, parameter ρ
afor the ratio of PDSCH channel every RE energy and the every RE energy of CRS, namely represent the ratio of URS and CRS Initial Trans, utilize this parameter to revise U_RSRP/C_RSRP, the gain absolute value that the ratio energy correct response obtained is brought by wave beam forming.In embodiments of the present invention, UE is according to parameter ρ
a, C_RSRP and U_RSRP determine beam forming gain, its specific implementation can be realized by following formula:
Wherein, G is beam forming gain.
It should be noted that the technical scheme that the embodiment of the present invention provides, the beam forming gain be not only applicable under transmission mode 7 is measured, and also goes for the gain of other wave beam formings such as transmission mode 8 grade, does not repeat them here.
In embodiments of the present invention, the algorithm that the calculating employing of special pilot frequency for user Signal reception power is identical with the measuring amount cell-specific pilot signal reception power that agreement specifies, is convenient to realize.Meanwhile, the ratio of pilot received power can more intuitively and reflect beam forming gain really, can be revised for CQI and figuration gain observation more accurately.
Theoretical estimation or indirect inspection beam forming gain compared to existing technology, the technical scheme that the embodiment of the present invention provides can obtain the real gain of current beam figuration more accurately, not only may be used for carrying out CQI more accurately to revise, can also be used for observation beam ormed channel quality, whether monitoring aerial and relevant device normally work.
By describing above and can finding out, in the technical scheme that the embodiment of the present invention provides, subscriber equipment is by determining C_RSRP and U_RSRP, thus according to determined C_RSRP, U_RSRP and parameter determination beam forming gain, achieve the real gain knowing and monitor current beam figuration, thus CQI correction can be carried out more exactly, and observation beam ormed channel quality, whether monitoring aerial and relevant device normally work.
Based on the technical conceive that said method embodiment is identical, the embodiment of the present invention additionally provides a kind of subscriber equipment that can be applicable to above-mentioned flow process.
As shown in Figure 2, be the structural representation of a kind of subscriber equipment that the embodiment of the present invention provides, can comprise:
First determination module 21, for determining cell-specific pilot signal reception power C_RSRP;
Second determination module 22, for determining special pilot frequency for user Signal reception power U_RSRP;
3rd determination module 23, for according to described C_RSRP, U_RSRP received power and parameter ρ
adetermine beam forming gain; Wherein, described parameter ρ
afor the ratio of Physical Downlink Shared Channel PDSCH every RE energy and the every RE energy of cell-specific pilot tone CRS.
Wherein, described first determination module 21 specifically for, according to CRS resource mapping relation, obtain the CRS in the downgoing baseband frequency-region signal that receives, and determine cell-specific pilot signal reception power according to described CRS.
Wherein, described second determination module 22 specifically for, according to URS resource mapping relation, obtain the URS in the downgoing baseband frequency-region signal that receives, and determine special pilot frequency for user Signal reception power according to described URS.
Wherein, described 3rd determination module is according to parameter ρ
aand described C_RSRP and U_RSRP determines beam forming gain, realize especially by following formula:
Wherein, G is beam forming gain.
By describing above and can finding out, in the technical scheme that the embodiment of the present invention provides, subscriber equipment is by determining C_RSRP and U_RSRP, thus according to determined C_RSRP, U_RSRP and parameter determination beam forming gain, achieve the real gain knowing and monitor current beam figuration, thus CQI correction can be carried out more exactly, and observation beam ormed channel quality, whether monitoring aerial and relevant device normally work.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (6)
1. a beam forming gain defining method, is applied in Long Term Evolution LTE system, it is characterized in that, comprise the following steps:
User equipment (UE) determination cell-specific pilot signal reception power C_RSRP and special pilot frequency for user Signal reception power U_RSRP;
Described UE is according to parameter ρ
aand described C_RSRP and U_RSRP determines beam forming gain; Wherein, described parameter ρ
afor the ratio of Physical Downlink Shared Channel PDSCH every RE energy and the every RE energy of cell-specific pilot tone CRS;
Described according to parameter ρ
aand described C_RSRP and U_RSRP determines beam forming gain, realize especially by following formula:
Wherein, G is beam forming gain.
2. the method for claim 1, is characterized in that, described UE determines cell-specific pilot signal reception power, is specially:
Described UE, according to CRS resource mapping relation, obtains the CRS in the downgoing baseband frequency-region signal received, and determines cell-specific pilot signal reception power according to described CRS.
3. the method for claim 1, is characterized in that, described UE determines special pilot frequency for user Signal reception power, is specially:
Described UE, according to special pilot frequency for user URS resource mapping relation, obtains the URS in the downgoing baseband frequency-region signal received, and determines special pilot frequency for user Signal reception power according to described URS.
4. a user equipment (UE), is applied to Long Term Evolution LTE system, it is characterized in that, comprising:
First determination module, for determining cell-specific pilot signal reception power C_RSRP;
Second determination module, for determining special pilot frequency for user Signal reception power U_RSRP;
3rd determination module, for according to described C_RSRP, U_RSRP received power and parameter ρ
adetermine beam forming gain; Wherein, described parameter ρ
afor the ratio of Physical Downlink Shared Channel PDSCH every RE energy and the every RE energy of cell-specific pilot tone CRS;
Described 3rd determination module is according to parameter ρ
aand described C_RSRP and U_RSRP determines beam forming gain, realize especially by following formula:
Wherein, G is beam forming gain.
5. UE as claimed in claim 4, is characterized in that
Described first determination module specifically for, according to CRS resource mapping relation, obtain the CRS in the downgoing baseband frequency-region signal that receives, and determine cell-specific pilot signal reception power according to described CRS.
6. UE as claimed in claim 4, is characterized in that,
Described second determination module specifically for, according to special pilot frequency for user URS resource mapping relation, obtain the URS in the downgoing baseband frequency-region signal that receives, and determine special pilot frequency for user Signal reception power according to described URS.
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| CN201210017361.8A CN102438304B (en) | 2012-01-19 | 2012-01-19 | A kind of beam forming gain defining method and equipment |
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| CN201210017361.8A CN102438304B (en) | 2012-01-19 | 2012-01-19 | A kind of beam forming gain defining method and equipment |
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| CN102438304B true CN102438304B (en) | 2015-11-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017049599A1 (en) * | 2015-09-25 | 2017-03-30 | Qualcomm Incorporated | Csi reporting for beamformed csi-rs based fd-mimo |
| WO2018006355A1 (en) * | 2016-07-07 | 2018-01-11 | 华为技术有限公司 | Transmission weight value selection method and base station |
| SG11201906629XA (en) | 2017-01-23 | 2019-08-27 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method and device for transmitting uplink signals |
| US10368325B2 (en) | 2017-02-03 | 2019-07-30 | Futurewei Technologies, Inc. | System and method for beam adaptation in a beam-based communications system |
| CN108668312B (en) * | 2017-03-29 | 2021-10-26 | 华为技术有限公司 | Measurement parameter sending method and device |
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| CN101754347A (en) * | 2008-12-19 | 2010-06-23 | 大唐移动通信设备有限公司 | CQI estimation method, system and device during multi-stream beamforming transmission |
| CN101841357A (en) * | 2009-03-16 | 2010-09-22 | 夏普株式会社 | Downlink data transmission method, base station and user equipment |
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| JP5616363B2 (en) * | 2010-01-08 | 2014-10-29 | パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Communication apparatus and communication method |
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| CN101753188A (en) * | 2008-12-19 | 2010-06-23 | 大唐移动通信设备有限公司 | Channel rank estimation method, system and device during multi-stream beamforming transmission |
| CN101754347A (en) * | 2008-12-19 | 2010-06-23 | 大唐移动通信设备有限公司 | CQI estimation method, system and device during multi-stream beamforming transmission |
| CN101841357A (en) * | 2009-03-16 | 2010-09-22 | 夏普株式会社 | Downlink data transmission method, base station and user equipment |
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