CN102438304A - Method and equipment for determining beamforming gain - Google Patents
Method and equipment for determining beamforming gain Download PDFInfo
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Abstract
The invention discloses a method and a device for determining beamforming gain, which are applied to an LTE system, and the method comprises the following steps: the user equipment UE determines a cell-specific pilot signal received power C _ RSRP and a user-specific pilot signal received power U _ RSRP; the UE according to the parameters
And the C _ RSRP and the U _ RSRP determine a beamforming gain. In the invention, the real gain of the current beam forming is obtained and monitored.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of wave beam forming gain and confirm method and apparatus.
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 through the weight coefficient of each array element in the adjustment aerial array, thereby can obtain tangible array gain.The beam shaping technology all has very big advantage at aspects such as expanding the coverage area, improve edge throughput and interference inhibition.
Also adopted the beam shaping technology in LTE (Long Term Evolution, the Long Term Evolution) agreement.At PDSCH (Physical Downlink Shared Channel; Physical Downlink Shared Channel) defined beamforming transmission scheme in the transmission mode 7 based on single port special pilot frequency for user (UE-specific Reference Signals is hereinafter to be referred as URS).UE (User Equipment, subscriber equipment) need utilize the equivalent channel behind the URS estimation beam shaping to carry out coherent detection.On the other hand; UE need be according to cell-specific pilot tone (Cell-specific Reference Signals is hereinafter to be referred as CRS) measurement pilot signals received power (Reference Signal Received Power is hereinafter to be referred as RSRP); And calculating CQI (Channel Quality Indicator; CQI), be used for the base station decision and send modulating-coding grade (Modulation and Coding Scheme is hereinafter to be referred as MCS).Because CRS is used for the down-run survey of all UE in the sub-district, can not carry out beam shaping.The CRS power that UE receives is not comprise excipient gain, also can't reflect the real channel quality behind the beam shaping based on the measurement result of CRS.Base station side need be made correction for the CQI value could determine true MCS grade.
The technical scheme of the real gain of current wave beam forming is not known and monitored to prior art.
Summary of the invention
The object of the present invention is to provide a kind of wave beam forming gain to confirm method and apparatus, to realize knowing and monitoring the real gain of current wave beam forming.
In order to reach above purpose, the embodiment of the invention provides a kind of wave beam forming gain to confirm method, is applied to may further comprise the steps in the LTE system:
User equipment (UE) is confirmed cell-specific pilot signal received power C_RSRP and special pilot frequency for user signal received power U_RSRP;
Said UE confirms the wave beam forming gain according to parameter
and said C_RSRP and U_RSRP; Wherein, said parameter
is the ratio of every RE energy of Physical Downlink Shared Channel PDSCH and the every RE energy of cell-specific pilot tone CRS.
The embodiment of the invention also provides a kind of user equipment (UE), is applied to the LTE system, comprising:
First determination module is used for confirming cell-specific pilot signal received power C_RSRP;
Second determination module is used for confirming special pilot frequency for user signal received power U_RSRP;
The 3rd determination module is used for confirming the wave beam forming gain according to said C_RSRP, U_RSRP received power and parameter
; Wherein, said parameter
is the ratio of every RE energy of Physical Downlink Shared Channel PDSCH and the every RE energy of cell-specific pilot tone CRS.
Compared with prior art, the present invention has the following advantages at least:
The above embodiment of the present invention, subscriber equipment pass through to confirm C_RSRP and U_RSRP, thereby confirm the wave beam forming gain according to determined C_RSRP, U_RSRP and parameter, have realized knowing and monitoring the real gain of current wave beam forming.
Description of drawings
The schematic flow sheet of method is confirmed in a kind of wave beam forming gain that Fig. 1 provides for the embodiment of the invention;
The structural representation of a kind of subscriber equipment that Fig. 2 provides for the embodiment of the invention.
Embodiment
Through Theoretical Calculation, owing to receive channel environmental change, ripple to reach the influence of factors such as the angle estimation is inaccurate, the gain behind the wave beam forming will be lower than calculated value in the prior art.
To the problem that exists in the above-mentioned prior art, the technical scheme that the embodiment of the invention provides a kind of wave beam forming gain to confirm is applied in the LTE system.In this technical scheme; Subscriber equipment is through confirming C_RSRP (Cell-specific Reference Signal Received Power; Cell-specific pilot reception power) and U_RSRP (UE-specific Reference Signal Received Power; The special pilot frequency for user received power), thereby confirms the wave beam forming gain, realized knowing and monitoring the real gain of current wave beam forming according to determined C_RSRP, U_RSRP and parameter.
To combine the accompanying drawing among the application below, the technical scheme among the application is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the application, rather than whole embodiment.Based on the embodiment among the application, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the application protects.
As shown in Figure 1, the schematic flow sheet of method is confirmed in a kind of wave beam forming gain that provides for the embodiment of the invention, can may further comprise the steps:
Concrete, in embodiments of the present invention, UE can obtain CRS according to CRS resource mapping relations from the downgoing baseband frequency-region signal that receives, and confirms C_RSRP according to the CRS that gets access to.Wherein, C_RSRP is an agreement specifying measurement item, confirms that according to CRS the concrete realization of C_RSRP is identical with implementation of the prior art.
Concrete, in embodiments of the present invention, UE can obtain URS according to URS resource mapping relations from the downgoing baseband frequency-region signal that receives, and confirms U_RSRP according to the URS that gets access to.Wherein, UE confirms the concrete realization (specific algorithm) of U_RSRP and the realization similar (input parameter becomes URS by CRS) of confirming C_RSRP according to CRS according to URS.
Concrete; Parameter
is the ratio of every RE energy of PDSCH channel and the every RE energy of CRS; The ratio of promptly representing URS and CRS Initial Trans; Utilize this parameter that U_RSRP/C_RSRP is revised, the gain absolute value that the ratio ability correct response that obtains is brought by wave beam forming.In embodiments of the present invention; UE confirms the wave beam forming gain according to parameter
, C_RSRP and U_RSRP, and its concrete realization can realize through following formula:
Wherein, G is the wave beam forming gain.
It should be noted that the technical scheme that the embodiment of the invention provides, be not only applicable to the wave beam forming gain measurement under the transmission mode 7, also go for the gain that transmission mode 8 waits other wave beam formings, repeat no more at this.
In embodiments of the present invention, the identical algorithm of measuring amount cell-specific pilot signal received power of the calculating employing of special pilot frequency for user signal received power and agreement regulation is convenient to realize.Simultaneously, the ratio of pilot reception power can be more intuitively and is reflected the wave beam forming gain really, can be used for CQI correction and figuration gain observation more accurately.
Compare in the prior art estimated in theory or measure the wave beam forming gain indirectly; The technical scheme that the embodiment of the invention provides can obtain the real gain of current wave beam forming more accurately; Not only can being used to carry out more accurately, CQI revises; Can also be used for observation beam figuration channel quality, whether monitoring aerial and relevant device operate as normal.
Can find out through above description; In the technical scheme that the embodiment of the invention provides, subscriber equipment passes through to confirm C_RSRP and U_RSRP, thereby confirms the wave beam forming gain according to determined C_RSRP, U_RSRP and parameter; Realized knowing and monitoring the real gain of current wave beam forming; Revise thereby can carry out CQI more exactly, and observation beam figuration channel quality, whether monitoring aerial and relevant device operate as normal.
Based on the identical technical conceive of said method embodiment, the embodiment of the invention also provides a kind of subscriber equipment that can be applicable to above-mentioned flow process.
As shown in Figure 2, the structural representation of a kind of subscriber equipment that provides for the embodiment of the invention can comprise:
The 3rd determination module 23 is used for confirming the wave beam forming gain according to said C_RSRP, U_RSRP received power and parameter
; Wherein, said parameter
is the ratio of every RE energy of Physical Downlink Shared Channel PDSCH and the every RE energy of cell-specific pilot tone CRS.
Wherein, said first determination module 21 specifically is used for, and according to CRS resource mapping relations, obtains the CRS in the downgoing baseband frequency-region signal that receives, and confirms cell-specific pilot signal received power according to said CRS.
Wherein, said second determination module 22 specifically is used for, and according to URS resource mapping relations, obtains the URS in the downgoing baseband frequency-region signal that receives, and confirms special pilot frequency for user signal received power according to said URS.
Wherein, Said the 3rd determination module is confirmed the wave beam forming gain according to parameter
and said C_RSRP and U_RSRP, specifically realizes through following formula:
Wherein, G is the wave beam forming gain.
Can find out through above description; In the technical scheme that the embodiment of the invention provides, subscriber equipment passes through to confirm C_RSRP and U_RSRP, thereby confirms the wave beam forming gain according to determined C_RSRP, U_RSRP and parameter; Realized knowing and monitoring the real gain of current wave beam forming; Revise thereby can carry out CQI more exactly, and observation beam figuration channel quality, whether monitoring aerial and relevant device operate as normal.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (8)
1.
Method is confirmed in a kind of wave beam forming gain, is applied to it is characterized in that in the Long Term Evolution LTE system, may further comprise the steps:
User equipment (UE) is confirmed cell-specific pilot signal received power C_RSRP and special pilot frequency for user signal received power U_RSRP;
Said UE is according to parameter 
And said C_RSRP and U_RSRP confirm the wave beam forming gain; Wherein, said parameter
Ratio for every RE energy of Physical Downlink Shared Channel PDSCH and the every RE energy of cell-specific pilot tone CRS.
2.
The method of claim 1 is characterized in that, said UE confirms cell-specific pilot signal received power, is specially:
said UE obtains the CRS in the downgoing baseband frequency-region signal that receives according to CRS resource mapping relations, and confirms cell-specific pilot signal received power according to said CRS.
3.
The method of claim 1 is characterized in that, said UE confirms special pilot frequency for user signal received power, is specially:
said UE obtains the URS in the downgoing baseband frequency-region signal that receives according to special pilot frequency for user URS resource mapping relations, and confirms special pilot frequency for user signal received power according to said URS.
4.
The method of claim 1 is characterized in that, and is said according to parameter And said C_RSRP and U_RSRP confirm the wave beam forming gain, specifically realizes through following formula:
wherein, G is wave beam forming gain.
5.
A kind of user equipment (UE) is applied to Long Term Evolution LTE system, it is characterized in that, comprising:
First determination module is used for confirming cell-specific pilot signal received power C_RSRP;
Second determination module is used for confirming special pilot frequency for user signal received power U_RSRP;
The 3rd determination module is used for according to said C_RSRP, U_RSRP received power and parameter 
Confirm the wave beam forming gain; Wherein, said parameter
Ratio for every RE energy of Physical Downlink Shared Channel PDSCH and the every RE energy of cell-specific pilot tone CRS.
6.
UE as claimed in claim 5 is characterized in that
said first determination module specifically is used for, and according to CRS resource mapping relations, obtains the CRS in the downgoing baseband frequency-region signal that receives, and confirms cell-specific pilot signal received power according to said CRS.
7.
UE as claimed in claim 5 is characterized in that,
said second determination module specifically is used for, and according to special pilot frequency for user URS resource mapping relations, obtains the URS in the downgoing baseband frequency-region signal that receives, and confirms special pilot frequency for user signal received power according to said URS.
8.
UE as claimed in claim 5 is characterized in that, said the 3rd determination module is according to parameter 
And said C_RSRP and U_RSRP confirm the wave beam forming gain, specifically realizes through following formula:
wherein, G is wave beam forming gain.
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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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017049599A1 (en) * | 2015-09-25 | 2017-03-30 | Qualcomm Incorporated | Csi reporting for beamformed csi-rs based fd-mimo |
| WO2018141205A1 (en) * | 2017-02-03 | 2018-08-09 | Huawei Technologies Co., Ltd. | System and method for beam adaptation in a beam-based communications system |
| CN108668312A (en) * | 2017-03-29 | 2018-10-16 | 华为技术有限公司 | Method and device for transmitting measurement parameters |
| CN109429549A (en) * | 2016-07-07 | 2019-03-05 | 华为技术有限公司 | Emission value selection method and base station |
| CN110178428A (en) * | 2017-01-23 | 2019-08-27 | Oppo广东移动通信有限公司 | The method and apparatus for transmitting uplink signal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017049599A1 (en) * | 2015-09-25 | 2017-03-30 | Qualcomm Incorporated | Csi reporting for beamformed csi-rs based fd-mimo |
| CN109429549A (en) * | 2016-07-07 | 2019-03-05 | 华为技术有限公司 | Emission value selection method and base station |
| CN110178428A (en) * | 2017-01-23 | 2019-08-27 | Oppo广东移动通信有限公司 | The method and apparatus for transmitting uplink signal |
| US10873378B2 (en) | 2017-01-23 | 2020-12-22 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for transmitting uplink signals |
| WO2018141205A1 (en) * | 2017-02-03 | 2018-08-09 | Huawei Technologies Co., Ltd. | System and method for beam adaptation in a beam-based communications system |
| US10368325B2 (en) | 2017-02-03 | 2019-07-30 | Futurewei Technologies, Inc. | System and method for beam adaptation in a beam-based communications system |
| CN108668312A (en) * | 2017-03-29 | 2018-10-16 | 华为技术有限公司 | Method and device for transmitting measurement parameters |
| US11089498B2 (en) | 2017-03-29 | 2021-08-10 | Huawei Technologies Co., Ltd. | Measurement parameter sending method and apparatus |
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