CN107483125A - Data processing method and system based on LTE/LTE upgrade version cells - Google Patents
Data processing method and system based on LTE/LTE upgrade version cells Download PDFInfo
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- CN107483125A CN107483125A CN201610405394.8A CN201610405394A CN107483125A CN 107483125 A CN107483125 A CN 107483125A CN 201610405394 A CN201610405394 A CN 201610405394A CN 107483125 A CN107483125 A CN 107483125A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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Abstract
The invention provides a kind of data processing method and system based on LTE/LTE upgrade version cells, LTE/LTE upgrade versions cell has at least two RRU and antenna, and at least two RRU and antenna have corresponding radio-frequency channel, wherein, methods described includes：Calibration result is received after the calibration of the radio-frequency channel of at least two RRU and antenna, and the phase width characteristic of any RRU at least two RRU is compensated using calibration result；Corresponding LTE/LTE upgrade versions cell is established according to uncompensated RRU at least two RRU and the RRU after compensation；Handle the data of LTE/LTE upgrade version cells.The problem of present invention, avoiding the modification to radio frequency, is compensated to the phase width property difference of at least two RRU and antenna, avoids due to RRU and antenna product and installation difference, and signal reception power gain is unstable when causing multiple RRU to combine or even deteriorates.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of based on LTE/LTE upgrade version cells
Data processing method and system.
Background technology
Long Term Evolution (Long Term Evolution, LTE)/LTE upgrade versions (LTE-Advanced) move
Dynamic communication network has obtained extensive deployment in the whole world, under some special scenes, it is necessary to
LTE/LTE upgrade version cells realize that overlength distance covers, such as on rural area or sea.This just requires to adopt
Special coverage enhancement technology is taken, realizes the overlength distance covering of LTE/LTE upgrade version cells.
Complete overlength distance covering should the preferred less low frequency of space loss, but because frequency resource is by state
Family's management and control, and low-frequency resources are rare, all taken at present by each system, for newly-built LTE/LTE
Upgrade version mobile network, it is difficult to obtain low-frequency resources, especially time division duplex (Time Division
Duplexing, TDD) LTE network, third generation partner program (3rd Generation Partner
Project, 3GPP) specification not yet for its define low frequency band.
On the premise of frequency is set, enhancing covering mainly has increase power and the multiple ways of enhancing demodulation performance
Footpath.For down direction, the antenna gain and demodulation performance of terminal are that base station side is uncontrollable, therefore
Main Means are the transmission power for increasing base station side, such as use high-power RF extension unit (Radio
Remote Unit, RRU), high-gain aerial, the less bandwidth used, power is concentrated on smaller
Power spectral density etc. is improved in bandwidth.
For up direction, the transmission power of terminal is set, and 0.2W is defined as in 3GPP specification,
From end side, increase transmission power is infeasible.But high-gain aerial can be configured (i.e. in base station side
High-gain aerial can strengthen up-downgoing covering simultaneously), receiving power is improved, and then complete up covering
Enhancing.
It is always limited to be limited to factor, the RRU transmission powers such as current technology level, base station volume
, the signal amplifying power that high-gain aerial can be lifted relative to ordinary antennas is similarly limited, even if
Multiple technologies use simultaneously, under many scenes, are still difficult to meet the needs of covering at a distance.
The content of the invention
The present invention provides a kind of data processing method and system based on LTE/LTE upgrade version cells, with solution
The limited coverage area of certainly current LTE/LTE upgrade version cells, the problem of actual demand can not be met.
In order to solve the above problems, the invention provides a kind of data based on LTE/LTE upgrade version cells
Processing method, the LTE/LTE upgrade versions cell have at least two radio frequency remote unit RRUs and day
Line, at least two RRU and the antenna have corresponding radio-frequency channel, and methods described includes：
After being calibrated in the radio-frequency channel of at least two RRU and the antenna, calibration result is received,
And the phase width characteristic of any RRU at least two RRU is mended using the calibration result
Repay；
According to the RRU after uncompensated RRU at least two RRU, and compensation, phase is established
The LTE/LTE upgrade version cells answered；
Handle the data of the LTE/LTE upgrade versions cell.
Correspondingly, present invention also offers a kind of data processing system based on LTE/LTE upgrade version cells
System, the LTE/LTE upgrade versions cell have at least two radio frequency remote unit RRUs and antenna, institute
Stating at least two RRU and the antenna has corresponding radio-frequency channel, and the system includes：
Compensating module, after being calibrated at least two RRU and the antenna radio-frequency channel,
Calibration result is received, and using the calibration result to any RRU's at least two RRU
Phase width characteristic compensates；
Module is established, after according to uncompensated RRU at least two RRU, and compensation
RRU, establish corresponding LTE/LTE upgrade versions cell；
Processing module, for handling the data of the LTE/LTE upgrade versions cell.
Compared with background technology, the present invention includes advantages below：
Based at least two Remote Radio Unit of joint (Radio Remote Unit, RRU) and antenna
LTE/LTE upgrade version cells, after being calibrated in the radio-frequency channel of at least two RRU and antenna, receive
Calibration result, and the phase width characteristic of any RRU at least two RRU is carried out using calibration result
Compensation so that even if at least two RRU are calibrated without combining, still are able to reach and combine calibrated mesh
's.By reading each RRU phase width characteristic, and compensate, avoided to radio frequency in base band
Modification, compensates to the phase width property difference of at least two RRU and antenna, avoids due to RRU
With antenna product and installation difference, when causing multiple RRU joints, signal reception power gain is not
It is stable, or even the problem of deterioration.
Ensure, to the minimum change of existing system, to reduce the loss of signal incoherent superposition as far as possible, ensure to increase
The stability of benefit.
Brief description of the drawings
Fig. 1 is the schematic diagram that physical antenna in the embodiment of the present invention is mapped to logical antenna ports；
Fig. 2 is the system port mapping schematic diagram of the antenna of two width dual polarization eight in the embodiment of the present invention；
Fig. 3 is a kind of data processing method based on LTE/LTE upgrade version cells in the embodiment of the present invention
Step flow chart；
Fig. 4 is the schematic diagram of the antenna spacing in the embodiment of the present invention；
Fig. 5 is a kind of data handling system based on LTE/LTE upgrade version cells in the embodiment of the present invention
Structural representation.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings
The present invention is further detailed explanation with embodiment.
The conventional distributed base station of communications industry at present, it is mainly made up of three parts, i.e. Base-Band Processing list
First (Base Band Unit, BBU), RRU and antenna, wherein BBU are responsible for the processing of baseband portion,
RRU is responsible for the processing of radio frequency part, and antenna is responsible for the transmitting-receiving of radiofrequency signal.In general, BBU
Often accessing a RRU, then BBU can establish a cell for it, and distribute corresponding process resource,
Handle the data of this cell.
Different from physical antenna, LTE/LTE upgrade versions define the antenna port of logic, actual physics
Antenna needs the antenna port for being mapped to logic to complete effective data transmission.For example, for conventional
The antenna of dual polarization 2 and 8 antennas, its mapping mode is as shown in Figure 1.Numbering is 1,2,3,4
Physical antenna is different with the polarised direction for the physical antenna that numbering is 5,6,7,8, during mapping, each
The corresponding system port of the antenna of polarised direction, for two physical channel antennas, the corresponding ports of antenna 1
0, the corresponding ports 1 of antenna 2, for eight physical channel antennas, the corresponding ports 0 of antenna 1,2,3,4,
The corresponding ports 1 of antenna 5,6,7,8.
It is as shown in table 1 for other currently used Traffic Channel ports, mapping mode.
Table 1
If combining multiple RRU and antenna, optimal mode is to carry out relevant joint, i.e., by several RRU
An entirety to be regarded as with antenna, carries out complete Combined Treatment, up-downgoing can obtain the gain of maximum,
But there is the use that factors limit the optimal policy at present.
First, the calibrated limitation of antenna.For time-division LTE (Time Division-LTE, TD-LTE),
Have benefited from the heterogeneite of up-downgoing channel, base station can estimate down channel by uplink receiving signal, from
And beamforming technique is utilized, the signal intensity in terminal direction is improved, reduces the interference in other directions.Ripple
The phase width characteristic of beam figuration technical requirements different radio frequency passage is consistent, but due to the RRU and physics of reality
It the difference of antenna device and cable, can not accomplish that phase width characteristic is consistent, therefore, it is necessary to carry out RRU
And antenna is calibrated, the difference for obtaining phase width characteristic between RRU and antenna compensates.Equipment at present,
Substantially a set of RRU+ antennas are independently calibrated, it is impossible to across RRU progress, and realize across RRU combine compared with
Standard, exploitation amount and difficulty are larger.
2nd, the limitation of complexity.From multiple-input, multiple-output (Multiple-Input Multiple-Output, MIMO)
System perspective is set out, and being concerned with, united effect is actual to be so that antenna number is double, and double antenna can cause
The signal transactings such as channel estimation, detection are required for redesigning from algorithm to realization, and computation complexity also can
Steeply rise, this is difficult to bear for the mobile network base station equipment that current disposal ability has been limited.
Optimal method is excluded, it is also an option that second best measure, i.e., still corresponding one according to each RRU
Cell carries out the processing of base band, is only that the data of this multiple cell processing are identical, with the reduction of minimum to mesh
The modification of preceding equipment, after the completion of data processing, only it is when data to physical antenna map, carries out a little
Modification, so as to complete multiple united effects of RRU+ antennas.Mainly there are two kinds of port mapping sides at present
Method, for the transmission mode of single port, such as transmission mode 7 (TM7) and transmission mode (TM8)
Single current, two methods mapping mode is identical, and it by all antenna mappings is a port to be all.For both ends
The transmission mode of mouth, then have differences, the first is that RRU is corresponding with port, and second is by pole
It is corresponding with RRU to change direction.It is described in detail below.
Method one：For system port, using a RRU as a port, such as 8 passages
For antenna, a pair of poliarizing antennas send identical signal, i.e., 1,5 send identical signal, 2,6 hairs
Identical signal is sent, 3,7 send identical signal, the identical signal of 4,8 transmissions, then by the eight of RRU1
Root physical antenna is mapped as port 0, and RRU2 eight physical antennas are mapped as port 1.Polarised direction
Respectively ± 45 ° of two poliarizing antennas send identical signal, then this will be equivalent to one to poliarizing antenna
Individual vertical polarized antenna, as shown in Figure 2.For TM8 double fluids, mapping mode and the port 0 of port 7
Identical, the mapping mode of port 8 is identical with port 1.For TM8 single currents and TM7, this method
The advantages of be that 16 antennas are equivalent to 8 double antennas of power, on the stacked system of signal, do not deposit
In non-coherent addition, shortcoming is that the polarised direction of two ports becomes identical by difference, two poles first
Change the natural orthogonality that direction provides to be destroyed, and the correlation of two ports becomes strong, in order to keep
MIMO performance (at least ten wavelength, such as Band 38, about need, it is necessary to larger spacing
Want 1.6m spacing) ensure the non-correlations of two ports, the otherwise MIMO such as spatial reuse, space diversity
The performance of system will decline, and larger antenna is a very big limit for the terrace of limited space
System, can cause the hardly possible popularization and application of this technology.
Method two：Do not change single RRU mapping mode, i.e., after multiple RRU joints, same polarization
The physical antenna in direction is a port.The advantages of this method is the antenna for not destroying poliarizing antenna offer
Orthogonality, antenna spacing is not required, even if two antennas also will not close to placement, performance side by side
It is affected, the advantage in terms of engineering is bigger.Method two can also have other improvement directions, for example,
According to the direction of single terminal, by carrying out phase compensation compared with quasi-divisor, carrying out multiple RRU connection
Close, it needs to select a preferable RRU of channel quality as main RRU.
It is too high to the requirement for height of antenna but method one requires too high antenna spacing, do not have substantially
Standby promotional value.Method two allows multiple RRU to be mounted side by side, but shortcoming has two, and one is due to same
The signal of a port can be sent simultaneously in multiple RRU, although the radio-frequency channel of each RRU and antenna
It is to be not implemented calibrated by calibrated, but between RRU, i.e., between multiple RRU and antenna radio-frequency channel
There can be a fixed phase difference, the presence of fixed skew can cause signal in different directions, no
In same distance, occur non-coherent addition in different sub-carrier, cause gain different directions, different distance,
Gain in different sub-carrier is unbalanced, and some are superimposed in the same direction, can obtain 3dB gain, and some
Reversely superposition, can cancel out each other on the contrary.Second, phase difference is changed with RRU change,
I.e. different cells can have different phase differences, and this can cause the gain situation of different districts also uneven
Weighing apparatus, can influence large-scale application.
Present invention is generally directed to method two to be improved, and ensures, to the minimum change of existing system, to try one's best
Compared with the loss of small-signal non-coherent addition, ensure the stability of gain.The present invention relates to radio-frequency channel compared with
Standard, the adjustment of broadcast wave bean shaping coefficient, the adjustment of data beam forming coefficient etc. are multiple to be needed to multiple
The step of radiofrequency characteristicses of RRU+ antennas compensate, each correlated process joint ensure that terminal receives letter
Number high quality so that the real income from RRU joints of terminal and whole system.It should be noted that
Because current terminal normally only supports up single antenna to send, base station side is entered by high specific unified algorithm
Row is received, and processing procedure can be closed with being consistent at present in soft bit stage or constellation point node
And present invention is generally directed to descending transmission process.
It is based on below by enumerating several specific embodiments one kind provided by the invention being discussed in detail
The data processing method and system of LTE/LTE upgrade version cells.
Embodiment one
A kind of data processing method based on LTE/LTE upgrade version cells provided by the invention is discussed in detail.
In general, LTE/LTE upgrade version cell establish process need to undergo RRU start,
The radio-frequency channel of RRU and antenna is calibrated, RRU accesses, is completed until cell is established, and carries out normal
Data transmit-receive.Cell can select suitable transmission mode according to the channel status of terminal, and be fixed on system
Port sends cell reference signals.In order to ensure that the phase width characteristic of radio-frequency channel is constantly in consistent state,
During data transmit-receive, cycle verification can be typically carried out, such as 1 hour is once verified.
Reference picture 3, show a kind of number based on LTE/LTE upgrade version cells in the embodiment of the present invention
According to the step flow chart of processing method.LTE/LTE upgrade versions cell in the embodiment of the present invention has at least
Two RRU and antenna, at least two RRU and antenna have corresponding radio-frequency channel.
Step 300, after being calibrated in the radio-frequency channel of at least two RRU and antenna, calibration result is received,
And the phase width characteristic of any RRU at least two RRU is mended using the calibration result
Repay.
In RRU and the radio-frequency channel calibration phase of antenna, final phase width characteristic will not after calibrated at present
BBU is notified, because for common single RRU cells, BBU requires no knowledge about current radio frequency and led to
The specific phase width characteristic in road, its needs are consistent.The present invention need not be to RRU and antenna
The calibrated flow in radio-frequency channel modify, it is only necessary to radio-frequency channel calibrate after the completion of, by calibration result
BBU is notified, calibration result includes the phase width characteristic after multiple RRU calibrations, and BBU is just known that more
Phase width property difference between individual RRU, before data are submitted to RRU, carry out the benefit of phase width characteristic
Repay, so as to eliminate the difference of multiple RRU+ antenna rfs passages.
When the LTE/LTE upgrade versions cell has two RRU and antenna, it is assumed that first RRU
It is respectively with phase width characteristics of second RRU after the completion of calibratedWithWherein,
For the Amplitude Compensation coefficient of k-th of RRU, i-th of subcarrier,Carried for k-th of RRU, i-th of son
The compensation of delay coefficient of ripple, e are natural constant, and j is imaginary unit, fiFor the frequency of i-th of subcarrier,
Then BBU is pre- in the data of second RRU, i-th of subcarrier before data are sent to RRU
First it is multiplied byAnd then all consistent effect of phase width characteristic of two RRU radio-frequency channel.
Step 302, according to uncompensated RRU at least two RRU, and the RRU after compensation,
Establish corresponding LTE/LTE upgrade versions cell.
After being compensated to RRU phase width characteristic, the phase width characteristic of at least two RRU reaches
Consistent effect, then corresponding LTE/LTE upgrade versions cell can be established according at least two RRU.
The embodiment of the present invention is not limited to the particular technique feature for establishing LTE/LTE upgrade version cells.
Step 304, the data of the LTE/LTE upgrade versions cell are handled.
The step 304 can specifically include：Obtain the original beamformin coefficient that data are sent；It is determined that
Direction where terminal；Direction according to where terminal compensates to the original beamformin coefficient,
Obtain renewal beamformin coefficient；The LTE/LTE upgradings are sent using the renewal beamformin coefficient
The data of version cell.Wherein, the direction according to where terminal is mended to the original beamformin coefficient
Repay, it is the key point in the step 304 to obtain renewal beamformin coefficient.Be described in detail below how
Carry out the compensation of beamformin coefficient.
In data transmission phase, for beamforming technique, it is desirable to which less antenna spacing (is mostly 0.5
Wavelength again), to utilize the principle of interference of ripple, reach the purpose of signal highly directive.It is more for using
The scene of individual antenna, it is difficult to after ensureing that multiple antennas are mounted side by side, the spacing of each physical antenna or equal
Even, firstly, since the difference of antenna packages, positioned at the distance between the antenna at edge and antenna casing
It is uncertain, secondly, be limited to the operating error of worker when situation and the installation on ground, can cause antenna it
Between distance it is uneven.If the broadcast wave bean shaping coefficient still before use, may result in broadcast
Directional diagram produces Severe distortion, declines in some dot gains serious.After multiple antenna joints, if do not changed
Become broadcast forming coefficient, then understand that antenna gain occurs especially big according to caused broadcast figuration distortion
Fluctuating, in multiple angles, antenna gain from maximum 10dB be reduced to -16.67dB, then
The terminal of these approximate angles, the signal intensity received will be very weak, can have a strong impact on the entirety of network
Performance, if be adjusted to beamformin coefficient, stability has obtained the lifting of highly significant.Need
Illustrate, beamformin coefficient is relevant with single antenna directional diagram, it is necessary to according to specific day line style
Number recalculate, and need to be selected according to networking, the search of beamformin coefficient is with selection not at this
In invention scope.
The basic goal of TM7 and TM8 wave beam forming is in order to which transmission power is concentrated on where terminal
Direction so that the signal power that terminal receives maximizes, while can reduce the interference in other directions.
For TDD, the up channel that beamformin coefficient can be estimated according to SRS calculates, and conventional has feature
Vector algorithm (Eigenvalue Based Beamforming, EBB) and beam scanning algorithm (Grid Of
Beam, GOB) two methods.EBB to channel by carrying out singular value decomposition, by wave beam forming system
Number is set to characteristic vector corresponding to eigenvalue of maximum, and in the case where that accurately can obtain channel, performance is most
It is excellent, but due to imperfect, channel time-varying characteristics, the channel estimation errors of up-downgoing channel reciprocity
Deng the channel that base station side is estimated can be caused error to be present so that wave beam perfect can not point to terminal direction,
So that its performance applied in systems in practice has declined.GOB is then by direct estimation terminal institute
Direction, the beamformin coefficient of the precalculated fixation of each angle is then selected to, so as to real
The purpose that existing power is concentrated in terminal direction, GOB robustness is stronger in real network, and more
After RRU joints, if using EBB algorithms, it is necessary to the channel Combined Treatment of multiple antennas, complexity
It can not receive at present with change amount, therefore, the present invention recommends GOB algorithms.
In order to reduce change amount and complexity, in up direction, base station side still individually estimates end by RRU
Hold angle.Because the RRU channels of multiple antennas have differences, therefore the angle that multiple RRU are estimated
It is different, angle can be averaged, combine multiple RRU estimated result, angle can be improved and estimated
The accuracy of meter, when obtaining GOB figuration vectors, inquired about according to angle.
When multiple RRU combine and sent, also due to the distance between antenna casing and edge antenna,
The thickness of shell is relevant with antenna model, limitation and operating error of the installation site of antenna etc., must
When can so cause across RRU, the distance between antenna can change, and cause spacing between antenna not
Uniformly, the interference of electromagnetic wave is destroyed.If without processing, the figuration pattern of synthesis can be caused to occur sternly
Distort again.In single RRU figurations, antenna radiation pattern can be directed at 20 degree of directions, but using multiple
During RRU, without any amendment, it may result in directional diagram and produce distortion, multiple peak values occur, and
Peak value substantially 20 ° of skew, and the gain in 20 ° of directions substantially reduces, this can cause two it is bad
Consequence, one is the signal receiving strength of terminal reduces, the second is the terminal interference to other directions adds
By force, the performance of whole network can all be affected.
The present invention proposes a kind of method being modified to beamformin coefficient so that multiple RRU joints
Afterwards, main lobe direction remains to be directed at terminal.The averaged power spectrum result in direction, generation first according to where terminal
GOB wave beam formings vector when antenna spacing is uniform, such as：
Wherein α is direction where terminal, and k ∈ { 0,1 ..., N-1 } are antenna index, and N is the multiple RRU of joint
Antenna sum in single polarised direction afterwards, e are natural constant, and j is imaginary unit, and λ is electromagnetic wave
Wavelength, such as the antenna of dual polarization 8, in the case of two RRU are united, N=8.Then according to day
The difference of linear array spacing and antenna spacing, is compensated to GOB figuration vectors, is obtained renewal wave beam and is assigned
Shape coefficient.Assuming that the spacing of the adjacent antenna in antenna 1 is do, the spacing of the adjacent antenna in antenna 2
Also it is do, the spacing of last root antenna of antenna 1 and first antenna of antenna 2 is da, antenna 1
Antenna with antenna 2 for two different numberings of setting, antenna 1 and antenna 2 can for same size,
The antenna of type or model, the embodiment of the present invention are not limited to the design parameter of antenna, such as Fig. 4 institutes
Show, then the rear N/2 element of GOB wave beam formings vector is multiplied byCompensate, so that after
Continuation of insurance card, GOB main lobe direction are still directed at direction where terminal.
It should be noted that above beamformin coefficient is relevant with wavelength i.e. frequency, due to LTE/LTE
Upgrading edition system is multicarrier system, it is therefore desirable to generates a wave beam forming compensation system for each carrier wave
Number.
In summary, the technical scheme in the embodiment of the present invention, based at least two RRU of joint and day
The LTE/LTE upgrade version cells of line, after being calibrated in the radio-frequency channel of at least two RRU and antenna,
Calibration result is received, and it is special to the phase width of any RRU at least two RRU using calibration result
Property compensate so that even if at least two RRU without combine it is calibrated, still be able to reach joint
Calibrated purpose.By reading each RRU phase width characteristic, and compensate, avoid in base band
Modification to radio frequency, the phase width property difference of at least two RRU and antenna is compensated, avoided
Due to RRU and antenna product and installation difference, when causing multiple RRU to combine, signal receives
Power gain is unstable, or even the problem of deterioration.
When carrying out data transmission using beamforming technique, it is contemplated that because antenna array encapsulates and installs
The distance between caused antenna is uneven, and the distance between antenna array is compensated so that at end
Extreme direction produces the effect of even linear array, i.e. signal direction where terminal can obtain maximum, that is, increase
The strong quality of useful signal, reduces the interference to other direction terminals, can significantly improve descending again
The throughput of system of Traffic Channel.
When determining terminal direction, while consider that multiple RRU pass through detection reference signal (Sounding
Reference Signal, SRS) estimation result, and be averaged, processing simply, and can disappear
Except evaluated error caused by becoming soon due to single RRU channels, higher property is realized with minimum complexity
Energy.
Ensure, to the minimum change of existing system, to reduce the loss of signal incoherent superposition as far as possible, ensure to increase
The stability of benefit.
For broadcast wave bean shaping, it is impossible to the compensation of phase width characteristic is carried out for some terminal, but should
According to the concrete model of antenna, re-search for broadcasting forming coefficient, avoid because the incoherent of signal is folded
Add and caused by change cost, when multiple RRU are combined, due to radio-frequency channel do not combine it is calibrated and
The fluctuation of broadcast figuration figure is violent caused by signal incoherent superposition, or even is absorbed in deep attenuation in some directions,
The problem of having a strong impact on systematic function has obtained good solution.
Embodiment two
A kind of data handling system based on LTE/LTE upgrade version cells provided by the invention is discussed in detail.
Reference picture 5, show a kind of data based on LTE/LTE upgrade version cells in the embodiment of the present invention
The structural representation of processing system.The LTE/LTE upgrade versions cell has at least two RRU and day
Line, at least two RRU and the antenna have corresponding radio-frequency channel.
The system can include：Compensating module 50, module 52 and processing module 54 are established, wherein,
The processing module 54 can include：Coefficient obtains module, direction determining mould, compensating coefficient module
And data transmission blocks.The compensating coefficient module can include：Vector generation module and vector compensation mould
Block.
Be discussed in detail separately below each module function and each module between relation.
Compensating module 50, for calibrating it at least two RRU and the antenna radio-frequency channel
Afterwards, calibration result is received, and using the calibration result to any RRU at least two RRU
Phase width characteristic compensate.
Preferably, the compensating module 50, which works as the LTE/LTE upgrade versions cell, has two RRU
During with antenna, after being calibrated in the radio-frequency channel of described two RRU and antenna, described two RRU are received
Phase width characteristic after calibration, and before data are sent to RRU, after being calibrated using described two RRU
Phase width characteristic the phase width characteristic of any RRU in described two RRU is compensated, with described in order
Two RRU phase width characteristic is consistent.
Phase width characteristic after described two RRU calibration is respectivelyWithWherein
For the Amplitude Compensation coefficient of k-th of RRU, i-th of subcarrier,Carried for k-th of RRU, i-th of son
The compensation of delay coefficient of ripple；The compensating module 50 is using the phase width characteristic after described two RRU calibrations
The phase width characteristic of any RRU in described two RRU is compensated, is specially：The compensation mould
Block 50 is multiplied by advance in the data of second RRU, i-th of subcarrier
Module 52 is established, for according to uncompensated RRU at least two RRU, and compensation
RRU afterwards, establish corresponding LTE/LTE upgrade versions cell.
Processing module 54, for handling the data of the LTE/LTE upgrade versions cell.
Preferably, the processing module 54 can include：
Coefficient obtains module, for obtaining the original beamformin coefficient of data transmission.
Direction determining mould, for determining the direction where terminal.
Compensating coefficient module, the original beamformin coefficient is carried out for the direction according to where terminal
Compensation, obtain renewal beamformin coefficient.Specifically, the compensating coefficient module can include：
Vector generation module, for the averaged power spectrum result according to direction where terminal, described in generation
The wave beam forming vector of beam scanning algorithm when the antenna spacing of LTE/LTE upgrade version cells is uniform；To
Compensating module is measured, for the antenna array spacing according to the LTE/LTE upgrade versions cell and antenna spacing
Difference, the figuration vector of beam scanning algorithm is compensated, obtain renewal beamformin coefficient.
Data transmission blocks, for sending the LTE/LTE upgradings using the renewal beamformin coefficient
The data of version cell.
The LTE/LTE upgrade versions cell is multi-carrier district, wherein, the corresponding renewal of each carrier wave
Beamformin coefficient.
In summary, the technical scheme in the embodiment of the present invention, based at least two RRU of joint and day
The LTE/LTE upgrade version cells of line, after being calibrated in the radio-frequency channel of at least two RRU and antenna,
Receive calibration result, and the phase width characteristic using calibration result to any RRU at least two RRU
Compensate so that even if at least two RRU are calibrated without combining, it is calibrated still to be able to reach joint
Purpose.By reading each RRU phase width characteristic, and compensate, avoided to penetrating in base band
The modification of frequency, the phase width property difference of at least two RRU and antenna is compensated, avoid due to
RRU and antenna product and installation difference, when causing multiple RRU to combine, signal reception power increases
Benefit is unstable, or even the problem of deterioration.
When carrying out data transmission using beamforming technique, it is contemplated that because antenna array encapsulates and installs
The distance between caused antenna is uneven, and the distance between antenna array is compensated so that at end
Extreme direction produces the effect of even linear array, i.e. signal direction where terminal can obtain maximum, that is, increase
The strong quality of useful signal, reduces the interference to other direction terminals, can significantly improve descending again
The throughput of system of Traffic Channel.
When determining terminal direction, while consider the result that multiple RRU are estimated by SRS, and put down
, processing is simple, and can eliminate due to evaluated error caused by the fast change of single RRU channels, with
Minimum complexity realizes higher performance.
Ensure, to the minimum change of existing system, to reduce the loss of signal incoherent superposition as far as possible, ensure to increase
The stability of benefit.
For broadcast wave bean shaping, it is impossible to the compensation of phase width characteristic is carried out for some terminal, but should
According to the concrete model of antenna, re-search for broadcasting forming coefficient, avoid because the incoherent of signal is folded
Add and caused by change cost, when multiple RRU are combined, due to radio-frequency channel do not combine it is calibrated and
The fluctuation of broadcast figuration figure is violent caused by signal incoherent superposition, or even is absorbed in deep attenuation in some directions,
The problem of having a strong impact on systematic function has obtained good solution.
For system embodiment, because it is substantially similar to embodiment of the method, so the comparison of description
Simply, the relevent part can refer to the partial explaination of embodiments of method.
Each embodiment in this specification is described by the way of progressive, and each embodiment stresses
Be all difference with other embodiment, between each embodiment identical similar part mutually referring to
.
At a kind of data based on LTE/LTE upgrade version cells provided above the embodiment of the present invention
Manage method and system, be described in detail, specific case used herein to the principle of the present invention and
Embodiment is set forth, the explanation of above example be only intended to help the method for understanding the present invention and
Its core concept；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, having
There will be changes in body embodiment and application, in summary, this specification content should not manage
Solve as limitation of the present invention.
Claims (12)
1. a kind of data processing method based on LTE/LTE upgrade version cells, it is characterised in that described
LTE/LTE upgrade versions cell has at least two radio frequency remote unit RRUs and an antenna, and described at least two
Individual RRU and the antenna have corresponding radio-frequency channel, and methods described includes：
After being calibrated in the radio-frequency channel of at least two RRU and the antenna, calibration result is received,
And the phase width characteristic of any RRU at least two RRU is mended using the calibration result
Repay；
According to the RRU after uncompensated RRU at least two RRU, and compensation, phase is established
The LTE/LTE upgrade version cells answered；
Handle the data of the LTE/LTE upgrade versions cell.
2. according to the method for claim 1, it is characterised in that at least two RRU and
After the radio-frequency channel calibration of the antenna, calibration result is received, and using the calibration result to described
The step of phase width characteristic of any RRU at least two RRU compensates, including：
When the LTE/LTE upgrade versions cell has two RRU and antenna, in described two RRU
After the calibration of the radio-frequency channel of antenna, the phase width characteristic after described two RRU calibrations is received, and
Before sending data to RRU, the phase width characteristic after being calibrated using described two RRU is to described two
The phase width characteristic of any RRU in RRU compensates, to make described two RRU phase width characteristic
Unanimously.
3. according to the method for claim 2, it is characterised in that after described two RRU calibrations
Phase width characteristic is respectivelyWithWhereinFor k-th of RRU, i-th of subcarrier
Amplitude Compensation coefficient,For the compensation of delay coefficient of k-th of RRU, i-th of subcarrier, e is nature
Constant, j are imaginary unit, fiFor the frequency of i-th of subcarrier；
Phase width characteristic after being calibrated using described two RRU is to any RRU in described two RRU
Phase width characteristic the step of compensating, including：
It is multiplied by advance in the data of second RRU, i-th of subcarrier
4. according to the method for claim 1, it is characterised in that the processing LTE/LTE
The step of data of upgrade version cell, including：
Obtain the original beamformin coefficient that data are sent；
Determine the direction where terminal；
Direction according to where terminal compensates to the original beamformin coefficient, obtains renewal wave beam
Forming coefficient；
The data of the LTE/LTE upgrade versions cell are sent using the renewal beamformin coefficient.
5. according to the method for claim 4, it is characterised in that the side according to where terminal
Compensated to the original beamformin coefficient, obtain the step of updating beamformin coefficient, including：
The averaged power spectrum result in direction according to where terminal, generate the day of the LTE/LTE upgrade versions cell
The wave beam forming vector of beam scanning algorithm when line spacing is uniform；
According to the antenna array spacing of the LTE/LTE upgrade versions cell and the difference of antenna spacing, to wave beam
The figuration vector of scanning algorithm compensates, and obtains renewal beamformin coefficient.
6. method according to any one of claims 1 to 5, it is characterised in that the LTE/LTE
Upgrade version cell is multi-carrier district, wherein, the corresponding renewal beamformin coefficient of each carrier wave.
7. a kind of data handling system based on LTE/LTE upgrade version cells, it is characterised in that described
LTE/LTE upgrade versions cell has at least two radio frequency remote unit RRUs and an antenna, and described at least two
Individual RRU and the antenna have corresponding radio-frequency channel, and the system includes：
Compensating module, after being calibrated at least two RRU and the antenna radio-frequency channel,
Calibration result is received, and using the calibration result to any RRU's at least two RRU
Phase width characteristic compensates；
Module is established, after according to uncompensated RRU at least two RRU, and compensation
RRU, establish corresponding LTE/LTE upgrade versions cell；
Processing module, for handling the data of the LTE/LTE upgrade versions cell.
8. system according to claim 7, it is characterised in that the compensating module is when described
When LTE/LTE upgrade versions cell has two RRU and antenna, in penetrating for described two RRU and antenna
After the calibration of frequency passage, the phase width characteristic after described two RRU calibrations is received, and send to RRU
Before data, the phase width characteristic after being calibrated using described two RRU is to any in described two RRU
RRU phase width characteristic compensates, to make described two RRU phase width characteristic consistent.
9. system according to claim 8, it is characterised in that after described two RRU calibrations
Phase width characteristic is respectivelyWithWhereinFor k-th of RRU, i-th of subcarrier
Amplitude Compensation coefficient,For the compensation of delay coefficient of k-th of RRU, i-th of subcarrier, e is nature
Constant, j are imaginary unit, fiFor the frequency of i-th of subcarrier；
The compensating module is using the phase width characteristic after described two RRU calibrations in described two RRU
Any RRU phase width characteristic compensate, be specially：The compensating module is in second RRU
It is multiplied by advance in the data of i subcarrier
10. system according to claim 7, it is characterised in that the processing module, including：
Coefficient obtains module, for obtaining the original beamformin coefficient of data transmission；
Direction determining mould, for determining the direction where terminal；
Compensating coefficient module, the original beamformin coefficient is carried out for the direction according to where terminal
Compensation, obtain renewal beamformin coefficient；
Data transmission blocks, for sending the LTE/LTE upgradings using the renewal beamformin coefficient
The data of version cell.
11. system according to claim 10, it is characterised in that the compensating coefficient module,
Including：
Vector generation module, for the averaged power spectrum result according to direction where terminal, described in generation
The wave beam forming vector of beam scanning algorithm when the antenna spacing of LTE/LTE upgrade version cells is uniform；
Vector compensation module, for the antenna array spacing and antenna according to the LTE/LTE upgrade versions cell
The difference of spacing, the figuration vector of beam scanning algorithm is compensated, obtain renewal beamformin coefficient.
12. according to any described system of claim 7 to 11, it is characterised in that the LTE/LTE
Upgrade version cell is multi-carrier district, wherein, the corresponding renewal beamformin coefficient of each carrier wave.
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