CN103916227B - It is a kind of send common pilot method and base station - Google Patents
It is a kind of send common pilot method and base station Download PDFInfo
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- CN103916227B CN103916227B CN201310008657.8A CN201310008657A CN103916227B CN 103916227 B CN103916227 B CN 103916227B CN 201310008657 A CN201310008657 A CN 201310008657A CN 103916227 B CN103916227 B CN 103916227B
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Abstract
This application discloses a kind of method for sending common pilot CRS, in the network applied to the LTE R12 new carrier type deployment being introduced into, the subframe for the transmission CRS that base station is carried in the new carrier wave in the network includes two time slots.This method comprises: sending CRS when the base station sends CRS by any PRB of any subframe on a time slot in two time slots that the PRB pair is answered, not sending CRS on another time slot.Based on same inventive concept, the application proposes a kind of base station, and in the case where CRS occupies full bandwidth, pilot density can be reduced on frequency domain.
Description
Technical field
This application involves field of communication technology, in particular to a kind of method for sending common pilot and base station.
Background technique
New carrier type is introduced in 12nd version long term evolution (LTE R12) version, it is therefore an objective to preferably dispose isomery
Network reduces the transmission for always sending (always on) signal, reaches energy-efficient purpose, and can use scrappy frequency range
To improve spectrum efficiency.
Always on signal is common pilot (CRS), and in the version before R12, there are three effect difference for this signal
Are as follows: it is used as data demodulation；It is measured as wireless resource management (RRM)；And it is used as temporal frequency and tracks.In R11, pass through by
The time cycle of CRS pilot tone increases to 5ms by 1ms, and only stays a port, and it goes without doing demodulation use.In this way when
Between upper lower pilot density, achieve the purpose that save energy.
It is proposed in LTE R11 by increasing the time cycle of CRS pilot tone and realizes that reduction pilot tone is close in time
Degree, to achieve the purpose that save energy.It is introduced after new carrier type in LTE Release12 version, it is new to be carried on this
When subframe on carrier wave sends CRS, the transmission CRS mode of pilot density is reduced on frequency domain, is not taken the post as in the prior art
What implementation.
Summary of the invention
In view of this, the application provide it is a kind of send common pilot method and base station, occupy the feelings of full bandwidth in CRS
Under condition, pilot density can be reduced on frequency domain.
In order to solve the above technical problems, the technical scheme of the present invention is realized as follows:
A method of common pilot CRS is sent, in the network applied to the LTE R12 new carrier type deployment being introduced into,
The subframe for the transmission CRS that base station is carried in the new carrier wave in the network includes two time slots, comprising:
When the base station sends CRS by any PRB of any subframe, when one in two time slots that the PRB pair is answered
CRS is sent in gap, does not send CRS on another time slot.
A kind of base station can be applied in the network for the new carrier type deployment that LTE R12 is introduced into, and base station carries in the network
The subframe of transmission CRS in the new carrier wave includes two time slots, and the base station includes: transmission unit；
The transmission unit, when sending CRS by any PRB of any subframe for this base station, answered in the PRB pair two
CRS is sent on a time slot in a time slot, does not send CRS on another time slot.
In conclusion selecting a time slot of the subframe to send out when the application sends CRS by any subframe by base station
It send, another time slot does not send CRS.In the case where CRS occupies full bandwidth, pilot density is reduced on frequency domain.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram that CRS is sent in the specific embodiment of the invention；
Fig. 2 is the schematic diagram for sending CRS in the embodiment of the present invention on the PRB of distribution odd number mark；
Fig. 3 is the schematic diagram for sending CRS in the embodiment of the present invention on the PRB of distribution even number mark；
Fig. 4 is in the specific embodiment of the invention for sending the structural schematic diagram of CRS.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, right hereinafter, referring to the drawings and the embodiments,
Scheme of the present invention is described in further detail.
A kind of method for sending CRS is proposed in the embodiment of the present invention, the new carrier type deployment introduced applied to LTE R12
Network in, in the network base station be carried in the new carrier wave transmission CRS subframe include two time slots.The base station is by appointing
When any PRB of one subframe sends CRS, sent on a time slot in corresponding two time slots of the Physical Resource Block (PRB)
CRS does not send CRS on another time slot.
It is the method flow schematic diagram that CRS is sent in the specific embodiment of the invention referring to Fig. 1, Fig. 1.Specific steps are as follows:
Step 101, when base station sends CRS by any PRB of any subframe, in two time slots that the PRB pair is answered
CRS is sent on one time slot.
The subframe be can choose and be sent on any one time slot that any PRB pair in the subframe is answered there are two time slot
CRS, and CRS is not sent on another time slot.
Step 102, which does not send CRS on another time slot of the subframe.
For convenience, two time slots for including by the subframe for sending CRS are denoted as the first time slot and the second time slot, and are
N number of PRB allocation identification 1,2 ... N；CRS is sent on the first time slot that the PRB pair of distribution odd number mark is answered；In distribution even number
CRS is sent on the second time slot that the PRB pair of mark is answered, wherein N is natural number.
It is explained in detail below on PRB and how to send CRS's.Assuming that there is N number of PRB, the base station be N number of PRB allocation identification 1,
2 ... N, wherein N is natural number.The base station sends CRS on the first time slot that the PRB pair of distribution odd number mark is answered；It is distributing
CRS is sent on the second time slot that the PRB pair of even number mark is answered.
Referring to fig. 2, Fig. 2 is the schematic diagram for sending CRS in the embodiment of the present invention on the PRB of distribution odd number mark.In Fig. 2
By taking a distribution PRB as an example, a PRB occupies 12 continuous subcarriers on frequency domain, before routine (normal) circulation
When sewing (CP), 14 symbols are occupied in the time domain, former 7 symbols are as first time slot, when rear 7 symbols are as second
Gap.When according to extension CP, 12 symbols are occupied on frequency domain, in Fig. 2 by taking normal CP as an example.The box of R0 is filled in Fig. 2
On the first time slot answered for the PRB pair carry CRS position, it is seen that only on the first slot by port R0 send CRS, second
CRS is not sent on time slot.
It is the schematic diagram for sending CRS in the embodiment of the present invention on the PRB of distribution even number mark referring to Fig. 3, Fig. 3.In Fig. 3
By taking one is distributed the PRB of even number mark as an example, 12 continuous subcarriers are occupied on frequency domain with a PRB in Fig. 2, using normal
When advising (normal) cyclic prefix (CP), 14 symbols are occupied in the time domain, former 7 symbols are as first time slot, and latter 7
Symbol is as second time slot.The position that CRS is carried on the second time slot that R0 box is answered for the PRB pair is filled in Fig. 3, it is seen that only
CRS is sent by port R0 on the second time slot, does not send CRS on the second time slot.
Fig. 2 and Fig. 3 give it is a kind of send CRS on the first time slot for answering of PRB pair of distribution odd number mark, it is even in distribution
The second time slot that the PRB pair of number mark is answered sends the implementation of CRS, in specific implementation, can also be in distribution even number mark
The first time slot for answering of PRB pair send CRS, CRS is sent on the second time slot for answering of PRB pair of distribution odd number mark, according to making
The demand of user configures, and no longer enumerates here.
Above-mentioned transmission CRS mode can reduce pilot density on frequency domain, achieve the purpose that save energy.Simultaneously because
It is realized in the case where CRS occupies full bandwidth, therefore does not influence the precision of time and frequency measurement, that is, meet the resolution of time synchronization
Rate.The technical solution proposed in the specific embodiment of the invention can also applied in time-frequency tracking, and frequency selective channel is utilized
Frequency diversity gain is provided.
Same inventive concept is based in the specific embodiment of the invention, it is also proposed that a kind of base station can be applied to LTE R12 and draw
In the network of the new carrier type deployment entered, the subframe for the transmission CRS that base station is carried in the new carrier wave in the network includes two
A time slot.Referring to fig. 4, Fig. 4 is in the specific embodiment of the invention for sending the structural schematic diagram of CRS.The base station includes: to send
Unit 401.
Transmission unit 401, when sending CRS by any PRB of any subframe for this base station, answered in the PRB pair two
CRS is sent on a time slot in a time slot, does not send CRS on another time slot.
Preferably, the base station further comprises: configuration unit 402.
Configuration unit 402, when two time slots for including by the subframe for sending CRS are denoted as the first time slot and second
Gap；It and is N number of PRB allocation identification 1,2 ... N；Wherein, N is natural number.
Transmission unit 401 is further used for distributing configuration unit 402 on the first time slot that the PRB pair that odd number identifies is answered
Send CRS；Configuration unit 402 is distributed on the second time slot that the PRB pair that even number identifies is answered and sends CRS.
The unit of above-described embodiment can integrate in one, can also be deployed separately；It can be merged into a unit, it can also
To be further split into multiple subelements.
In conclusion base station is carried on the son of the transmission CRS in the new carrier wave in the network in the specific embodiment of the invention
Frame includes two time slots.When the base station sends CRS by any subframe, a time slot of the subframe is selected to send, another
Time slot does not send CRS.In the case where CRS occupies full bandwidth, pilot density is reduced on frequency domain.
It proposes in specific embodiment by PRB allocation identification, PRB is divided for odd number PRB and even number PRB, by surprise
CRS is sent on the first time slot that number PRB pair is answered, sends CRS on the second time slot of even number PRB, it is close that pilot tone is reduced on frequency domain
Degree while achieving the purpose that save energy, can provide frequency diversity using frequency selective channel and increase when time-frequency is tracked
Benefit.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (2)
1. a kind of method for sending common pilot CRS, the new carrier type introduced applied to the 12nd version long term evolution LTE R12
In the network of deployment, the subframe that base station is carried on the transmission CRS in the new carrier wave in the network includes two time slots, and feature exists
In, comprising:
When the base station sends CRS by any Physical Resource Block PRB of any subframe, in two time slots that the PRB pair is answered
CRS is sent on one time slot, does not send CRS on another time slot；
Wherein, when two time slots that the subframe for sending CRS includes being denoted as first the method further includes: the base station
Gap and the second time slot；It and is N number of PRB allocation identification 1,2 ... N；It is sent out on the first time slot that the PRB pair of distribution odd number mark is answered
Send CRS；CRS is sent on the second time slot that the PRB pair of distribution even number mark is answered, wherein N is natural number.
2. a kind of base station, in the network applied to the 12nd version long term evolution LTE R12 new carrier type deployment being introduced into, the net
It includes two time slots that base station, which is carried on the subframe of the transmission common pilot CRS in the new carrier wave, in network, which is characterized in that the base
Station includes: transmission unit；
The transmission unit, when sending CRS by any Physical Resource Block PRB of any subframe for this base station, in the PRB pair
CRS is sent on the time slot in two time slots answered, does not send CRS on another time slot；
Wherein, the base station further comprises: configuration unit；
The configuration unit, two time slots for including by the subframe for sending CRS are denoted as the first time slot and the second time slot；
For N number of PRB allocation identification 1,2 ... N；Wherein, N is natural number；
The transmission unit is further used for distributing the configuration unit on the first time slot that the PRB pair that odd number identifies is answered and send out
Send CRS；The configuration unit is distributed on the second time slot that the PRB pair that even number identifies is answered and sends CRS.
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| CN201310008657.8A CN103916227B (en) | 2013-01-09 | 2013-01-09 | It is a kind of send common pilot method and base station |
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| CN201310008657.8A CN103916227B (en) | 2013-01-09 | 2013-01-09 | It is a kind of send common pilot method and base station |
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| CN103916227A CN103916227A (en) | 2014-07-09 |
| CN103916227B true CN103916227B (en) | 2019-02-05 |
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| CN101540633A (en) * | 2008-03-21 | 2009-09-23 | 大唐移动通信设备有限公司 | Method, system and base station for downlink transmission |
| CN102239647A (en) * | 2009-02-01 | 2011-11-09 | 华为技术有限公司 | Method for transmitting reference signals |
| CN102282899A (en) * | 2009-04-24 | 2011-12-14 | 华为技术有限公司 | Method for generating reference signals |
| WO2011046387A2 (en) * | 2009-10-15 | 2011-04-21 | Lg Electronics Inc. | Apparatus and method for transmitting and receiving reference signal (rs) for demodulation |
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Owner name: ZHANXUN COMMUNICATION (SHANGHAI) CO. LTD. Effective date: 20141016 |
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Effective date of registration: 20141016 Address after: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Applicant after: Research Institute of Telecommunications Transmission, Ministry of Industry and Information Technology Applicant after: Zhanxun Communication (Shanghai) Co., Ltd. Address before: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Applicant before: Research Institute of Telecommunications Transmission, Ministry of Industry and Information Technology |
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