CN101483455B - Method and apparatus for inserting special reference signal in physical resource block - Google Patents
Method and apparatus for inserting special reference signal in physical resource block Download PDFInfo
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- CN101483455B CN101483455B CN200810055719A CN200810055719A CN101483455B CN 101483455 B CN101483455 B CN 101483455B CN 200810055719 A CN200810055719 A CN 200810055719A CN 200810055719 A CN200810055719 A CN 200810055719A CN 101483455 B CN101483455 B CN 101483455B
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 6
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- 238000010295 mobile communication Methods 0.000 abstract description 2
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Abstract
The present invention discloses a method for inserting special reference signal in physical resource block, wherein the method comprises the following steps: generating a downlink sub-frame comprising two time slots; inserting two rows of special reference signals in the time domain in the data area of each time slot of downlink sub-frame; and executing wave beam forming procession to the downlink sub-frame. The invention also discloses a mobile communication transmitter. The solution of the invention can simultaneously support Nd=1 centralized transmission and Nd=2 frequency diversity transmission.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of method and apparatus that in Physical Resource Block, inserts DRS (Dedicated Reference Signal).
Background technology
Long Term Evolution project (Long Term Evolution; LTE) the wave beam forming transmission of DRS (Dedicated Reference Signal) is used in system's support; Promptly transmit and insert user's DRS (Dedicated Reference Signal) in the Physical Resource Block (PRB) of data, carry out the wave beam forming operation with data symbol the user; After the user receives, use DRS (Dedicated Reference Signal) to carry out the demodulation of data symbol.At present, the LTE system supports the downstream signal transmission of two kinds of frequency diversity degree (Nd): Nd=1 promptly centralized (Localized) transmission and Nd=2 promptly are the frequency hopping transmission of unit with PRB.Fig. 1 is the sketch map of frequency diversity formula transmission, vertically goes up expression each number of sub-carrier according to frequency distribution, and the PRB of user n is distributed in the expression of lattice portion branch, transversely representes two time slots of a sub-frame.As shown in Figure 1, during Nd=1 localized transmission, the PRB that distributes to same user in the sub-frame takies identical subcarrier in former and later two time slots; Be the frequency modulation transmission during Nd=2, the PRB that distributes to same user in the sub-frame takies different subcarriers in former and later two time slots.
Localized transmission is supported in the main consideration of DRS (Dedicated Reference Signal) design of prior art.Seldom consider to support the frequency hopping transmission.For example, a kind of commonplace DRS (Dedicated Reference Signal) pattern is in the data area of a sub-frame, to insert three row DRS (Dedicated Reference Signal)s, and is as shown in Figure 2.Subframe shown in Figure 2 comprises two time slots, and wherein first time slot comprises the control area, comprises public reference signal R in the control area
0And pilot signal, the remainder of first time slot and second time slot are the data area, wherein, and R
dThe DRS (Dedicated Reference Signal) of user n is distributed in expression.When this DRS (Dedicated Reference Signal) pattern is applied to the frequency diversity transmission of Nd=2, in first time slot, will have only a row user DRS (Dedicated Reference Signal), as shown in Figure 3.This will cause when carrying out channel estimating, utilizing the interpolation on the time domain, and particularly the control area is smaller, and user moving speed will have a strong impact on performance for estimating channel when higher.
Summary of the invention
In view of this, the embodiment of the invention proposes a kind of method and apparatus that in Physical Resource Block, inserts DRS (Dedicated Reference Signal), can support the localized transmission of Nd=1 and the frequency diversity formula transmission of Nd=2 simultaneously.
The method that the embodiment of the invention proposes comprises:
Generation comprises the descending sub frame of two time slots;
Judge whether the OFDM symbolic number that the control area of first time slot of said subframe takies reaches the threshold value that is provided with in advance on time domain; If; Then in the data area of first time slot; Insert a row DRS (Dedicated Reference Signal) on the time domain, on the time domain of second time slot of this subframe, insert two row DRS (Dedicated Reference Signal)s; Otherwise, in the data area of each time slot of descending sub frame, on time domain, insert two row DRS (Dedicated Reference Signal)s;
Said descending sub frame is carried out beam forming processing.
The base station that the embodiment of the invention proposes comprises:
Data processing module is used for data are carried out modulating-coding; The reference signal generation module is used to generate DRS (Dedicated Reference Signal);
Reference signal and resource mapping block, DRS (Dedicated Reference Signal) that is used for the reference signal generation module is generated and the handled data map of data processing module are assembled into the subframe that comprises two time slots and a plurality of subcarriers to Physical Resource Block; Said reference signal and resource mapping block further comprise: judging unit; Be used to judge whether the OFDM symbolic number that the control area from first time slot of the subframe of data processing module takies reaches the threshold value that is provided with in advance on time domain, and the output judged result; Map unit, when the judged result of said judging unit when being, be used in the data area of first time slot of said subframe, insert a row DRS (Dedicated Reference Signal) on the time domain, on the time domain of second time slot of this subframe, insert two row DRS (Dedicated Reference Signal)s; When the judged result of said judging unit for not the time, in the data area of each time slot of said subframe, on time domain, insert two row DRS (Dedicated Reference Signal)s;
The wave beam forming module is used for the subframe after said reference signal and the processing of resource mapping block is carried out wave beam forming.
Can find out from above technical scheme; 4 row DRS (Dedicated Reference Signal)s are inserted in data area in a sub-frame; Wherein preceding two row are arranged in first time slot, and back two row are arranged in second time slot, and this scheme can be supported the localized transmission of Nd=1 and the frequency diversity formula transmission of Nd=2 simultaneously.
Description of drawings
Fig. 1 is the sketch map of the frequency diversity formula transmission of prior art;
Fig. 2 is that a kind of DRS (Dedicated Reference Signal) of prior art inserts pattern diagram under the situation of Nd=1;
Fig. 3 is that a kind of DRS (Dedicated Reference Signal) of prior art inserts pattern diagram under the situation of Nd=2;
Fig. 4 is that the DRS (Dedicated Reference Signal) of the embodiment of the invention inserts pattern diagram;
Fig. 5 is the sketch map of first kind of definite DRS (Dedicated Reference Signal) original position in the embodiment of the invention scheme;
Fig. 6 is the sketch map of second kind of definite DRS (Dedicated Reference Signal) original position in the embodiment of the invention scheme;
Fig. 7 is the pattern diagram of the DRS (Dedicated Reference Signal) of embodiment of the invention scheme when the control area takies the OFDM symbol above threshold value;
The base station block diagram of Fig. 8 embodiment of the invention scheme.
Embodiment
Frequency diversity transmission when embodiment of the invention scheme is supported Nd=1 and Nd=2 simultaneously; 4 row DRS (Dedicated Reference Signal)s are inserted in data area in that the base station sends in the sub-frame of downlink transfer at terminal; Wherein preceding two row are arranged in first time slot, and back two row are arranged in second time slot.Fig. 4 is the DRS (Dedicated Reference Signal) pattern sketch map of the embodiment of the invention.When carrying out the localized transmission of Nd=1, the terminal can utilize four row DRS (Dedicated Reference Signal)s in the sub-frame to carry out time domain interpolation when carrying out channel estimating; When the frequency diversity transmission of carrying out Nd=2, the terminal can utilize two row DRS (Dedicated Reference Signal)s of one of them time slot to carry out time domain interpolation when carrying out channel estimating.
In order to indicate conveniently, in each wave beam forming zone, the frequency domain original position of DRS (Dedicated Reference Signal) can be identical with the original position of public reference signal in this zone, perhaps differs the subcarrier of fixed number.As shown in Figure 5.A wave beam forming zone is meant a time-frequency region using the same beam shape-endowing weight value.
Perhaps, the frequency domain original position of DRS (Dedicated Reference Signal) is reference with the frequency domain border in each wave beam forming zone, and the position is identical or differ the subcarrier of fixed number.As shown in Figure 6.
After confirming the frequency domain original position of DRS (Dedicated Reference Signal); The base station will be the frequency domain original position of determined DRS (Dedicated Reference Signal) notice terminal; So that when this descending sub frame is received at the terminal, can find DRS (Dedicated Reference Signal) according to the frequency domain original position of this DRS (Dedicated Reference Signal).
Increase along with the shared OFDM number of symbols in control area; The OFDM number of data area can reduce in first time slot; Insert two row reference signals in the data area in first time slot this moment and will cause the expense of reference signal to increase, but performance gain is not obvious.Can introduce a deterministic process this moment: whether the symbolic number of judging the control area greater than the threshold value that is provided with in advance, if, then only in first time slot, insert a row reference signal, otherwise, insertion two row reference signals in first time slot.Preferably, this threshold value can be set to 4.The example of inserting a row reference signal at first time slot is as shown in Figure 7.
The structured flowchart of the base station that the embodiment of the invention proposes is as shown in Figure 8, comprising:
Reference signal generation module 802 is used to generate DRS (Dedicated Reference Signal);
Reference signal and resource mapping block 803, DRS (Dedicated Reference Signal) that is used for reference signal generation module 801 is generated and data processing module 802 handled data map are assembled into the subframe that comprises two time slots and a plurality of subcarriers to Physical Resource Block; First time slot of said subframe comprises control area and data area, and second time slot comprises the data area, and in the data area of each time slot, two row DRS (Dedicated Reference Signal)s distribute on the time domain;
Wave beam forming module 804 is used for the subframe after said reference signal and the processing of resource mapping block is carried out wave beam forming.
Said reference signal and resource mapping block 803 further comprise:
Original position is confirmed the unit; Be used for the wave beam forming zone that will constitute from the subframe of said data processing module; According to the frequency domain original position in the frequency domain original position of the public reference signal in this wave beam forming zone or this wave beam forming zone, confirm to insert the frequency domain original position of DRS (Dedicated Reference Signal);
Notification unit is used for said original position is confirmed the frequency domain original position notice terminal of the DRS (Dedicated Reference Signal) that the unit is confirmed;
Judging unit is used to judge whether the OFDM symbolic number that the control area from first time slot of the subframe of data processing module 801 takies reaches the threshold value that is provided with in advance on time domain, and the output judged result;
Map unit, when the judged result of said judging unit when being, be used in the data area of first time slot of said subframe, insert a row DRS (Dedicated Reference Signal) on the time domain, on the time domain of second time slot of this subframe, insert two row DRS (Dedicated Reference Signal)s; When the judged result of said judging unit for not the time, in the data area of each time slot of said subframe, on time domain, insert two row DRS (Dedicated Reference Signal)s.
4 row DRS (Dedicated Reference Signal)s are inserted in the data area of embodiment of the invention scheme in a sub-frame, and wherein preceding two row are arranged in first time slot, and back two row are arranged in second time slot.Like this, when carrying out the localized transmission of Nd=1, the terminal can utilize four row DRS (Dedicated Reference Signal)s in the sub-frame to carry out time domain interpolation when carrying out channel estimating; When the frequency diversity transmission of carrying out Nd=2, the terminal can utilize two row DRS (Dedicated Reference Signal)s in the time slot to carry out time domain interpolation respectively when carrying out channel estimating.Therefore embodiment of the invention scheme can be supported the localized transmission of Nd=1 and the frequency diversity formula transmission of Nd=2 simultaneously.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a method of in Physical Resource Block, inserting DRS (Dedicated Reference Signal) is characterized in that, comprising:
Generation comprises the descending sub frame of two time slots;
Judge whether the OFDM symbolic number that the control area of first time slot of said subframe takies reaches the threshold value that is provided with in advance on time domain; If; Then in the data area of first time slot; Insert a row DRS (Dedicated Reference Signal) on the time domain, on the time domain of second time slot of this subframe, insert two row DRS (Dedicated Reference Signal)s; Otherwise, in the data area of each time slot of descending sub frame, on time domain, insert two row DRS (Dedicated Reference Signal)s;
Said descending sub frame is carried out beam forming processing.
2. method according to claim 1; It is characterized in that; In the data area of said each time slot at said descending sub frame, comprise inserting two row DRS (Dedicated Reference Signal)s on the time domain: the orthogonal frequency division multiplex OFDM symbol of said two row DRS (Dedicated Reference Signal)s fixed interval number on time domain.
3. method according to claim 1 is characterized in that, said threshold value is 4.
4. according to each described method of claim 1 to 3, it is characterized in that, said before inserting two row DRS (Dedicated Reference Signal)s on the time domain, further comprise:
The frequency domain original position of definite DRS (Dedicated Reference Signal) that will insert, and with determined frequency domain original position notice terminal.
5. method according to claim 4 is characterized in that, the frequency domain original position of said definite DRS (Dedicated Reference Signal) that will insert comprises:
In a wave beam forming zone, the original position of the public reference signal in the frequency domain original position of the DRS (Dedicated Reference Signal) that is inserted and this wave beam forming zone is identical, perhaps differs the subcarrier of fixed number.
6. according to each described method of claim 4, it is characterized in that the frequency domain original position of said definite DRS (Dedicated Reference Signal) that will insert comprises:
In a wave beam forming zone, the frequency domain original position of the DRS (Dedicated Reference Signal) that is inserted is identical with the frequency domain boundary position in this wave beam forming zone, perhaps differs the subcarrier of fixed number.
7. a base station is characterized in that, comprising:
Data processing module is used for data are carried out modulating-coding; The reference signal generation module is used to generate DRS (Dedicated Reference Signal);
Reference signal and resource mapping block, DRS (Dedicated Reference Signal) that is used for the reference signal generation module is generated and the handled data map of data processing module are assembled into the subframe that comprises two time slots and a plurality of subcarriers to Physical Resource Block; Said reference signal and resource mapping block further comprise: judging unit; Be used to judge whether the OFDM symbolic number that the control area from first time slot of the subframe of data processing module takies reaches the threshold value that is provided with in advance on time domain, and the output judged result; Map unit, when the judged result of said judging unit when being, be used in the data area of first time slot of said subframe, insert a row DRS (Dedicated Reference Signal) on the time domain, on the time domain of second time slot of this subframe, insert two row DRS (Dedicated Reference Signal)s; When the judged result of said judging unit for not the time, in the data area of each time slot of said subframe, on time domain, insert two row DRS (Dedicated Reference Signal)s;
The wave beam forming module is used for the subframe after said reference signal and the processing of resource mapping block is carried out wave beam forming.
8. base station according to claim 7 is characterized in that, said base station further comprises:
Original position is confirmed the unit; Be used for the wave beam forming zone that will constitute from the subframe of said data processing module; According to the frequency domain original position in the frequency domain original position of the public reference signal in this wave beam forming zone or this wave beam forming zone, confirm to insert the frequency domain original position of DRS (Dedicated Reference Signal);
Notification unit is used for said original position is confirmed the frequency domain original position notice terminal of the DRS (Dedicated Reference Signal) that the unit is confirmed.
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| CN200810055719A CN101483455B (en) | 2008-01-07 | 2008-01-07 | Method and apparatus for inserting special reference signal in physical resource block |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101616360B (en) * | 2009-07-24 | 2012-05-09 | 中兴通讯股份有限公司 | Method and system for sending positioning reference signal |
| KR101573001B1 (en) | 2009-08-24 | 2015-11-30 | 삼성전자주식회사 | Receiver and method for using reference singnal thereof |
| CN101895813A (en) * | 2009-11-13 | 2010-11-24 | 北京三星通信技术研究有限公司 | Methods for transmitting and receiving location reference signals |
| CN102668629B (en) * | 2010-02-11 | 2014-12-10 | 上海贝尔股份有限公司 | Super -physical-resource-block-based method and apparatus for determining shift modes of channel state information reference signal |
| CN102271396B (en) * | 2010-03-12 | 2016-03-02 | 北京三星通信技术研究有限公司 | The method of mobile position estimation |
| CN102792725B (en) * | 2010-06-18 | 2015-04-22 | 上海贝尔股份有限公司 | Method and apparatus for monitoring downlink channel quality |
| JP6252586B2 (en) * | 2013-06-21 | 2017-12-27 | 富士通株式会社 | TRANSMISSION DEVICE, RECEPTION DEVICE, TRANSMISSION METHOD, AND RECEPTION METHOD |
| CN103475605B (en) * | 2013-09-24 | 2016-08-17 | 重庆邮电大学 | Channel estimation methods based on user's DRS (Dedicated Reference Signal) in a kind of 3GPPLTE-A downlink system |
| WO2017000263A1 (en) * | 2015-06-30 | 2017-01-05 | 华为技术有限公司 | Reference signal transmission method and device |
| CN107786313B (en) * | 2016-08-27 | 2020-10-09 | 华为技术有限公司 | Reference signal configuration method and related equipment |
| CN108632190B (en) * | 2017-03-24 | 2022-06-17 | 中兴通讯股份有限公司 | Information sending and receiving method and device, terminal and base station |
| CN110999235B (en) * | 2017-08-10 | 2023-03-28 | 三菱电机株式会社 | Transmitting apparatus |
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