CN103795448B - Method of adjustment, data processing method, base station equipment and the system of interface rate - Google Patents
Method of adjustment, data processing method, base station equipment and the system of interface rate Download PDFInfo
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Abstract
The invention discloses a kind of method of adjustment of interface rate, data processing method, base station equipment and system.Pass through scheme disclosed by the invention, first base station equipment is no longer to transmit each circuit-switched data by its Ir interfaces full dose between the second base station equipment, but benchmark is used as using a certain circuit-switched data, residual quantity transmission is carried out to other at least circuit-switched datas, so as to the mode transmitted relative to full dose, the actual data transfer amount of Ir interfaces is greatly reduced.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of adjustment of base station equipment interface rate, data processing side
Method, base station equipment and system.
Background technology
Cellular network device wireless side is mainly made up of RNC, base station and antenna, and current base station is largely using distributed base
Stand form, by the baseband processing equipment for being responsible for Base-Band Processing（BBU, Building base Band Unit）At responsible radio frequency
The radio frequency remote equipment of reason（RRU, Radio Remote Unit）Two parts are constituted, and are connected by optical fiber interface therebetween（With
Lower abbreviation Ir interfaces）, as shown in Figure 1.
Specifically, the functional unit that BBU and RRU are included is as shown in Figure 2.Wherein, BBU mainly includes Lub interface Slab elements,
Main control unit, baseband processing unit, clock processing unit etc., and RRU then mainly includes digital intermediate frequency unit, transceiver unit
（TRX）Unit, power amplifier and filter unit.Interface between BBU and RRU is Ir interfaces.
Due to transmitting all passages on Ir interfaces（Antenna）Baseband signal samples data, therefore it is required that its bearer rate compared with
It is high.The bearer rate and systematic sampling rate, carrier number, antenna number, the factor such as quantization bit bit wide are relevant.With 8 antenna 20MHz bands
Wide TD-LTE system, the specific formula for calculation of bearer rate is as follows：
2（IQ）* sample rate * carrier numbers * antenna numbers * bit bit wides *（10B/8B is encoded）
According to above-mentioned formula, if it is that 1, antenna number is 8 that sample rate, which is 30.72M, carrier wave rate, bit a width of 16 then has 2*
30.72M*1*8*16*10/8=9.8304Gbps, i.e. the Ir interfaces of the TD-LTE system of 8 antenna 20MHz bandwidth bearer rate
Demand is 9.8304Gbps.
Obtained Ir bandwidth demands are calculated in a similar way refers to table 1.
Table 1：
| TD-LTE bandwidth | Antenna number | Bearer rate (the unit of Ir interfaces：Gbps) |
| 2*20M | 8 | 19.6608 |
| 20M | 8 | 9.8304 |
| 2*20M | 2 | 4.9152 |
| 20M | 2 | 2.4576 |
According to upper table as can be seen that in smart antenna LTE system（8 antennas）, the bearer rates of Ir interfaces requires higher,
It is required that using the optical module of 10G speed grades（I.e. bearer rate is 10G optical module, hereinafter referred to as 10G optical modules）Carrying, it is right
In the system of 2 20M bandwidth, then two 10G optical modules carryings are needed.So cause two problems：
1st, optical mode block cost and its speed grade are closely related, and 10G optical modules price compares the optical module valency of 5G/6G grades
3~5 times of Ge Yuegao, causes equipment cost to increase；
2nd, multistage RRU serially concatenateds are difficult to, in multiple RRU serially concatenateds, the bearer rate of every grade of Ir interface is needed
It is multiplied（Since it is desired that carrying multiple RRU data simultaneously）.As shown in figure 3, being 4 RRU, i.e. RRU1 ~ RRU4 serial stages
In the schematic diagram of connection, Fig. 3, it is assumed that the Ir interfaces between RRU1 and RRU2 are the Ir interfaces between 1 grade of Ir interfaces, RRU2 and RRU3
It is 3 grades of Ir interfaces for the Ir interfaces between 2 grades of Ir interfaces, RRU3 and RRU4, then the bearer rate of 3 grades of Ir interfaces is much larger than 2 grades
The bearer rate of Ir interfaces, bearer rate of the bearer rate much larger than 1 grade of Ir interface of 2 grades of Ir interfaces.Also, 3 grades of Ir interfaces
Bearer rate can typically exceed 10Gbps.
It is still immature presently more than the optical module of 10G speed grades, therefore in actual TD-LTE, still can use
10G optical modules.However, from above mentioned problem 2,10G optical modules can not meet the demand of the scene, so as to need to reduce list
The data volume transmitted in the time of position by every grade of Ir interface, to ensure that 10G optical modules disclosure satisfy that the carrying of every grade of Ir interface
Rate requirement.
The content of the invention
The embodiment of the present invention provides a kind of method of adjustment, base station equipment and the system of base station equipment interface rate, to subtract
The volume of transmitted data of few Ir interfaces.
The present invention also provides a kind of data processing method and another base station equipment.
The embodiment of the present invention uses following technical scheme：
A kind of method of adjustment of base station equipment interface rate, including：First base station equipment obtains multichannel data；According to advance
The antenna shape-endowing weight value of setting, carries out weight computing to each circuit-switched data respectively, obtains each corresponding weight computing result；From
To weight computing result in determine at least one benchmark weight computing result, and remove the benchmark weight computing knot with what is obtained
At least one other weight computing result outside fruit as treating difference weight computing result, it is determined that treat difference weight computing result with
The difference for the benchmark weight computing result specified from the benchmark weight computing result of determination；According to benchmark weight computing result,
The difference and obtain except benchmark weight computing result and other weight computing knots in addition to treating difference weight computing result
Really, multichannel quantized result is obtained, and the quantized result is sent to by the second base station equipment by Ir interfaces.
A kind of data processing method, including：Second base station equipment receives point that first base station equipment is sent by Ir interfaces
Not Dui Yingyu multichannel data multiple quantized results；According to the data recovery rule pre-set, from the multiple quantized result
Middle determination benchmark quantized result；And according to the benchmark quantized result and data recovery rule, quantify to tie by the multiple
Other quantized results in addition to benchmark quantized result included in fruit are respectively converted into corresponding weight computing result.
A kind of base station equipment, including：Data acquiring unit, for obtaining multichannel data；Weight calculation unit, for basis
Antenna shape-endowing weight value set in advance, carries out weight computing for each circuit-switched data that data acquiring unit is obtained respectively, obtains phase
Each weight computing result answered；Benchmark determining unit, used in calculating obtained weight computing result from weight calculation unit
Determine at least one benchmark weight computing result；Difference value determining unit, the benchmark is removed for what is obtained with data acquiring unit
At least one other weight computing result outside weight computing result is as difference weight computing result is treated, it is determined that treating difference weights
Result of calculation and the difference for the benchmark weight computing result specified in the benchmark weight computing result determined from benchmark determining unit；
Quantized result determining unit, for determined according to benchmark determining unit benchmark weight computing result, difference value determining unit determine
The difference, and data acquiring unit obtain except benchmark weight computing result and in addition to treating difference weight computing result
Other weight computing results, obtain multichannel quantized result；Transmitting element, is used for and by Ir interfaces, quantized result is determined single
The quantized result that member is obtained is sent to other base station equipments.
A kind of base station equipment, including：Receiving unit, for receiving the difference that other base station equipments are sent by Ir interfaces
Corresponding to multiple quantized results of multichannel data；Determining unit, it is single from receiving for according to the data recovery rule pre-set
Benchmark quantized result is determined in multiple quantized results that member is received；Converting unit, for the base determined according to determining unit
What is included in quasi- quantized result and data recovery rule, the multiple quantized result that receiving unit is received removes datum quantity
Change other quantized results outside result, be respectively converted into corresponding weight computing result.
A kind of adjustment system of base station equipment interface rate, including first base station equipment and the second base station equipment, wherein：
First base station equipment, for obtaining multichannel data；According to antenna shape-endowing weight value set in advance, respectively to each way
According to weight computing is carried out, each corresponding weight computing result is obtained；At least one is determined from obtained weight computing result
Benchmark weight computing result, and at least one other weight computing result in addition to the benchmark weight computing result to obtain
As difference weight computing result is treated, it is determined that treating difference weight computing result with being specified from the benchmark weight computing result of determination
Benchmark weight computing result difference；According to benchmark weight computing result, the difference and obtain remove benchmark weights meter
Calculate result and treat other weight computing results beyond difference weight computing result, obtain multichannel quantized result, and connect by Ir
The quantized result is sent to the second base station equipment by mouth；
Second base station equipment, multichannel data is corresponded respectively to for receiving first base station equipment by what Ir interfaces were sent
Multiple quantized results；According to the data recovery rule pre-set, benchmark quantized result is determined from the multiple quantized result；
And according to the benchmark quantized result and data recovery rule, will be included in the multiple quantized result except benchmark quantifies
As a result other outer quantized results are respectively converted into the weight computing result of respective antenna.
The embodiment of the present invention has the beneficial effect that：
Using above-mentioned technical proposal, first base station equipment is no longer complete by its Ir interface between the second base station equipment
Each circuit-switched data of amount transmission, but using a certain circuit-switched data as benchmark, residual quantity transmission is carried out to other at least circuit-switched datas, so that phase
The mode transmitted for full dose, greatly reduces the actual data transfer amount of Ir interfaces.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of cellular network device wireless side；
Fig. 2 is the functional unit schematic diagram that BBU and RRU are included；
Fig. 3 is RRU serially concatenated schematic diagram；
Fig. 4 is the processing procedure schematic diagram of data in the prior art to No. 8 antennas；
Fig. 5 is the corresponding relation schematic diagram of antenna shape-endowing weight value and antenna；
Fig. 6 be prior art with the present invention in for Ir interfaces transmission bandwidth demand contrast schematic diagram；
Fig. 7 illustrates for a kind of idiographic flow of method of adjustment of base station equipment interface rate provided in an embodiment of the present invention
Figure；
Fig. 8 is a kind of idiographic flow schematic diagram of data processing method provided in an embodiment of the present invention；
Fig. 9 a are the system structure diagram for realizing embodiment 1；
Fig. 9 b are the idiographic flow schematic diagram of embodiment 1；
A kind of Figure 10 concrete structure schematic diagrams of base station equipment provided in an embodiment of the present invention；
Figure 11 is the concrete structure schematic diagram of another base station equipment provided in an embodiment of the present invention.
Embodiment
By taking the TD-LTE system for the antenna 20MHz bandwidth of use 8 introduced in background technology as an example, cause between BBU and RRU
The higher major reason of Ir interface rates be that Ir interfaces need to transmit the data of No. 8 antennas, be that 16bit quantifies per circuit-switched data.
Wherein why quantified using 16bit partly in order to the quantitative graphs of promotion signal, raising base station demodulation ability is another
From the aspect of exist simultaneously from the user with a distance from the near and far of base station into actual scene, that is, there is large-and small-signal while corresponding to,
Therefore enough quantization bits are needed to meet dynamic range requirement（The difference of large-and small-signal）And to the resolution ratio of small-signal
Reach sufficient accuracy requirement.
In prior art, the processing main process of the data of No. 8 antennas is as shown in Figure 4.Data are in BBU by compiling
It is divided into two-way D1, D2 after the Base-Band Processings such as code, modulation into antenna excipient module.Antenna excipient module is directed to D1 and D2, respectively
Perform each road antenna shape-endowing weight value for producing the weight computing module in D1 and D2 and BBU（I.e. weight w 1, w2 ... w8, right
8 antennas are answered, are calculated in advance by excipient weights module）The operation of multiplication, so as to obtain 8 power corresponding to different antennae
Value result of calculation is to obtain respectively obtaining the actual processing data in 8 tunnels, and is transmitted by the way that the Ir interfaces between BBU and RRU are unified
To RRU.Specifically, D1 is multiplied respectively with w1, w2, w3 and w4, and D2 is multiplied respectively with w5, w6, w7 and w8.Inside RRU, then
It is directed to respectively per circuit-switched data, passes sequentially through the processing of data intermediate frequency module, transmitting-receiving process TRX modules and power amplifier/filtration module etc.,
The signal of generation is launched eventually through antenna.
Usually, the corresponding relation of antenna shape-endowing weight value and antenna is as shown in Figure 5.Current smart antenna it is general by two groups not
Same polarization（Positive 45 degree and minus 45 degree）4 antennas composition in direction, totally 8.Because 90 degree of polarised direction is vertical between two groups of antennas,
Therefore mutually it is completely independent, the corresponding two paths of data of D1, D2 is carried respectively.Four antenna spacing in same polarised direction are general
In 1/2 wavelength or so, with stronger correlation, therefore the excipient of subscriber signal can be realized by appropriate weighed combination
（I.e. so that the most strong direction alignment user of the useful signal sent in the air, and it is smaller in the interference that other directions are produced）.
Pass through the research to above-mentioned prior art, it can be deduced that following two features of prior art：
1st, correlation is stronger between four antennas of same polarised direction, therefore four road signals（Or data weights）Between exist
Larger correlation；
2nd, the key factor for causing existing Ir interface rates higher is that every road signal is required for transmitting original 16bit data,
It is to change just to tackle signal magnitude and levy the signal amplitude and resolution ratio of enough scopes greatly using 16bit purpose.
The embodiment of the present invention is based on above-mentioned two feature, it is considered to using the correlation of data between antenna, reduces actual transfer
Bit number, so as to reduce Ir interface rates.
It will not be dashed forward because the data between the antenna of every No. four have certain correlation, i.e. four circuit-switched data signal magnitude relations
Become, the general fluctuation in relatively small scope of difference attribute each other, so that big small size compared to sign primary signal
Degree, will be greatly reduced for characterizing the bit number needed for the relative different attribute.Therefore, can the tunnels of Mei tetra- in actual data transfer
In on the basis of the first circuit-switched data, initial data is still transmitted using 16bit, for other three circuit-switched data, then only transmission and benchmark
The difference value of data, the difference value is smaller due to fluctuation range, can use smaller M bit numbers（M<16）To represent, for example
8bit.Then recovered again based on a reference value and difference value per initial data all the way in opposite end.Transmitted in the prior art using 16bit
The required bandwidth of initial data（Bandwidth schematic diagram above in Fig. 6）With using scheme pin provided in an embodiment of the present invention
D1 and D2 are respectively adopted 16bit transmission of one line initial data, and the data on other three tunnels transmit required band using 8bit
It is wide（Underlying bandwidth schematic diagram in Fig. 6）Contrast schematic diagram is as shown in Figure 6.
Based on above-mentioned analysis, in order to reduce the volume of transmitted data of Ir interfaces, set the embodiments of the invention provide a kind of base station
The Adjusted Option of standby interface rate, is no longer complete by its Ir interface between the second base station equipment by first base station equipment
The same circuit-switched data that amount many antennas of transmission are respectively received, but using the data received by a certain antenna as benchmark,
The data received to other at least one antenna carry out residual quantity transmission, so that the mode transmitted relative to full dose, is substantially reduced
The actual data transfer amounts of Ir interfaces.
Below in conjunction with accompanying drawing, scheme provided in an embodiment of the present invention is described in detail.
First, the embodiment of the present invention provides a kind of method of adjustment of base station equipment interface rate, including it is as shown in Figure 7 under
State step：
Step 71, first base station equipment obtains multichannel data；
Such as, when first base station equipment is RRU, RRU can enter to the initial data being respectively received by many antennas
Row radio frequency processing, so that the data after obtaining the processing for corresponding respectively to different antennae obtain multichannel data.Wherein, each way
Different circuit-switched datas in are relative to each other.Here first base station equipment can also be BBU, and BBU obtains data from core net
Afterwards, obtain corresponding respectively to the multichannel data of different antennae by Base-Band Processing and weights processing, then sent by Ir interfaces
RRU processing, RRU is given to launch again by antenna after being disposed.
Usually, when first base station equipment is BBU, the second base station equipment described hereinafter is RRU.And work as first base station
When equipment is RRU, corresponding second base station equipment is BBU.Or, first, second base station equipment can also be different from BBU and
RRU other base station equipments, and it can also be other kinds of interface that the interface between them, which can be then Ir interfaces,.
By taking Fig. 4 as an example, it can be assumed that first base station equipment BBU obtain by its antenna 1 ~ 4 be respectively received it is same
Circuit-switched data, or, it can be assumed that the BBU obtains the same circuit-switched data that its antenna 5 ~ 8 is respectively received.By to acquisition
Data are encoded, modulated etc. after Base-Band Processing, the data after being handled.D1 and D2 as shown in Figure 4.Due to step 71
Implementation similarly to the prior art, therefore is repeated no more.
Step 72, according to antenna shape-endowing weight value set in advance, each circuit-switched data to acquisition carries out weight computing respectively, obtains
To each corresponding weight computing result；
Such as by taking Fig. 4 as an example, D1 is the data after processing., can by calculating D1 and w1, w2, w3 and w4 product respectively
To obtain the weights checkout result for antenna 1 ~ 4.
Similar, by calculating D2 and w5, w6, w7 and w8 product respectively, the weights knot for antenna 5 ~ 8 can be obtained
Calculate result.
Step 73, at least one benchmark weight computing result is determined from obtained weight computing result, and to obtain
At least one other weight computing result in addition to the benchmark weight computing result as treating difference weight computing result, it is determined that
Treat difference weight computing result and the difference for the benchmark weight computing result specified from the benchmark weight computing result of determination；
Such as, from the weights checkout result for antenna 1 ~ 4, the weight computing result for antenna 1 can be selected to make
On the basis of weight computing result, and using the weight computing result for antenna 2 as treating difference weight computing result, so that it is determined that
The difference of difference weight computing result and the benchmark weight computing result is treated, that is, determines D1 × w2-D1 × w1.
Step 74, according to benchmark weight computing result, by perform the difference obtained by step 73 and obtain remove base
Quasi- weight computing result and other weight computing results beyond difference weight computing result are treated, obtain multichannel quantized result, and
Pass through the interface between first base station equipment and the second base station equipment（Such as Ir interfaces）, quantized result is sent to the second base station and set
It is standby.
The weight computing result on the basis of D1 × w1, D1 × w2 is exemplified by treating difference weight computing result, quantifying object can
Think D1 × w1, D1 × w2-D1 × w1, D1 × w3 and D1 × w4.
Or, the weight computing result on the basis of D1 × w1, D1 × w2 quantifies object to treat difference weight computing result
Can be D1 × w1, D1 × w2-D1 × w1, D1 × w3-D1 × w2 and D1 × w4-D1 × w3.
Or, the weight computing result on the basis of D1 × w1, D1 × w2 quantifies object also to treat difference weight computing result
Can be D1 × w1, D1 × w2-D1 × w1, D1 × w3-D1 × w1 and D1 × w4-D1 × w1.
Compared to prior art it can be seen from above-mentioned quantization object, due to scheme provided in an embodiment of the present invention be with
A certain circuit-switched data carries out residual quantity transmission as benchmark to other at least circuit-switched datas related to the circuit-switched data, so that relative to
The mode of full dose transmission, greatly reduces the actual data transfer amount of Ir interfaces.
Above-mentioned quantization object can change according to the actual requirements, and base is used as long as guaranteeing to reach using a certain circuit-switched data
Other at least circuit-switched datas are carried out residual quantity transmission by standard.Such as, it is assumed that only determined from obtained weight computing result
One benchmark weight computing result, and only using obtained other weight computing result as treating difference weight computing result.
Assume that first base station equipment obtains N circuit-switched datas, and N altogether simultaneously>3, then the specific determination mode of quantized result can be as follows：
First, first base station equipment is directed to obtained other weight computing results in addition to benchmark weight computing result, meter
The difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained, wherein it is possible to treat difference
Fraction value result of calculation takes meet each more than or equal to 2 and less than or equal to N-1 successively as the 1st weight computing result, and m
Natural number；
Such as, the weight computing result on the basis of D1 × w1, D1 × w2 is exemplified by treating difference weight computing result, then works as m
When=2, the difference of the 2nd weight computing result and the 1st weight computing result is D1 × w3-D1 × w2, and as m=3, the
The difference of 3 weight computing results and the 2nd weight computing result is D1 × w4-D1 × w3.If having more antennas, calculating side
Formula the like.
Benchmark weight computing result is quantified based on first base station equipment, difference weight computing result and benchmark weight computing is treated
As a result difference, and obtained above-mentioned N-2 difference, it is possible to obtain multichannel quantized result.
In addition it should be noted that during multichannel quantized result is obtained, first base station equipment can be based on default
The first quantification gradation, quantify benchmark weight computing result and obtain except benchmark weight computing result and treating difference weight computing
As a result other benchmark weight computing results beyond, and based on default second quantification gradation, difference weight computing knot is treated in quantization
Fruit and the difference of benchmark weight computing result, and obtained above-mentioned N-2 difference.Wherein, the second quantification gradation can with but not
It is limited to the predetermined reduction ratio setting of bearer rate according to Ir interfaces.
Corresponding to the method for adjustment of above-mentioned base station equipment interface rate, the embodiment of the present invention also provides a kind of as shown in Figure 8
Data processing method, this method mainly include step as described below：
Step 81, the second base station equipment receives first base station equipment and passed through between first base station equipment and the second base station equipment
Multiple quantized results for sending of interface, wherein, the multichannel data that this multiple quantized results correspondence is relative to each other；
Here first base station equipment can be BBU, and the second base station equipment can be then RRU.Or, first base station is set
Standby can also be RRU, and corresponding second base station equipment can be then BBU.Or, first, second base station equipment can also be
Different from BBU and RRU other base station equipments, and it can also be other types that the interface between them, which can be then Ir interfaces,
Interface.
Step 82, the second base station equipment is according to the data recovery rule pre-set, from multiple quantized results of reception
Determine benchmark quantized result；
If quantized result is first base station equipment carry out that weight computing obtains according to its each circuit-switched data to acquisition each
Weight computing result and determine, then benchmark quantized result can calculate obtained each weights meter from first base station equipment
Calculate at least one the weight computing result determined in result.And in other quantized results in addition to benchmark quantized result, at least
There is the quantized result to be：Other weight computing result in addition at least one described weight computing result with from determination
The difference for the benchmark quantized result specified in benchmark weight computing result.
And then can specify that quantization on the basis of the quantized result corresponding to certain antenna in the data recovery rule pre-set
As a result.Such as, the mark of benchmark quantized result is can specify that in the rule.So, the second base station equipment can be just from advance
In the mark that each circuit-switched data is set respectively, it is determined that matching consistent mark with the mark of benchmark quantized result.Based on what is determined
The mark, you can realize from multiple quantized results, the mark of the mark matching with benchmark quantized result unanimously is corresponding
Quantized result is defined as benchmark quantized result.
For from specific implementation, with using the optical module of 10G speed grades, and first base station equipment be BBU and
Exemplified by second base station equipment is RRU, determine that the principle of benchmark quantized result is as follows from multiple quantized results of reception：
In Ir interface protocols, one can be all corresponded to for every circuit-switched data in the 2*4 circuit-switched datas transmitted by Ir interfaces
Individual unique number A, for 2 × 4 circuit-switched datas, its numbering A is typically followed successively by 1,2 ..., and 8.If assuming what is transmitted by Ir interfaces
Data total amount is 6400bit, then the average data volume per circuit-switched data is 6400/ (2 × 4)=800bit.For the 800bit on every road
Data volume, further, Ir interface protocols can also again be segmented to it.Such as, it is assumed that a data block is 80bit to every road
800bit data volumes are divided, and the 800bit data on Ze Mei roads can be divided into 10 data blocks, and its numbering C is general successively
For 1,2 ..., 10.
According to the above-mentioned regulation in Ir interface protocols, in the embodiment of the present invention, as long as BBU and RRU both sides make an appointment
Benchmark quantized result is at which（Such as preceding 4 circuit-switched data in 2 × 4 circuit-switched datas, benchmark quantized result can be arranged
It is that circuit-switched data that numbering is 3；And for rear 4 circuit-switched data in 2 × 4 circuit-switched datas, it is volume that can arrange benchmark quantized result
Number be 8 that circuit-switched data）, you can realize what RRU was distributed respectively according to every circuit-switched data for the different antennae corresponding to BBU
Mark（Than numbering A as described above）, and the mark corresponding to the benchmark quantized result arranged in advance with BBU, sent from BBU
Benchmark quantized result is determined in multiple quantized results.
Step 83, the second base station equipment will be wrapped according to benchmark quantized result and data recovery rule in multiple quantized results
Other quantized results in addition to benchmark quantized result contained, are respectively converted into corresponding weight computing result.
In the embodiment of the present invention, data recovery rule can be appointed by first base station equipment and the second base station equipment
's.Such as first base station equipment employs certain quantification manner, it is possible to the corresponding data recovery of the second base station equipment agreement
Rule.Specifically, if the quantization object of first base station equipment be D1 × w1, D1 × w2-D1 × w1, D1 × w3-D1 × w2 and
D1 × w4-D1 × w3, then can arrange corresponding data recovery rule as follows：
1st, quantized result on the basis of the quantized result obtained by quantization D1 × w1；
2nd, the quantized result corresponding to antenna 2 corresponds to weight computing result D1 × w2 of antenna 2 and benchmark quantization is tied
The difference of fruit；
3rd, the quantized result corresponding to antenna 3 corresponds to weight computing result D1 × w3 of antenna 3 with corresponding to antenna 2
Weight computing result D1 × w2 difference；
4th, the quantized result corresponding to antenna 4 corresponds to weight computing result D1 × w4 of antenna 4 with corresponding to antenna 3
Weight computing result D1 × w3 difference.
The data processing method provided according to embodiments of the present invention, can effectively realize that the data transmitted according to residual quantity are complete
It is whole to recover initial data.
Below by taking such scheme provided in an embodiment of the present invention application in practice as an example, such scheme is described in detail
Specific implementation.
Specific embodiment
Scheme provided in an embodiment of the present invention is realized using system as illustrated in fig. 9 in the specific embodiment.
In the specific embodiment, it is assumed that have two-way it is encoded in BBU, modulation etc. the business datum D1 of Base-Band Processing,
D2 enters antenna excipient module, wherein per road business datum four antennas of correspondence, and per road business datum by excipient weights module
Calculating is obtained.The data volume transmitted between reduction BBU and RRU is then realized in the specific embodiment, and ensures that RRU can be by data
The idiographic flow of recovery includes following step as shown in figure 9b：
Step 91, antenna shape-endowing weight value calculating is carried out in excipient module of D1, D2 two-way business datum in BBU, is obtained
Correspond respectively to the weight computing result of different antennae；
Specifically, the calculating that is multiplied respectively per business datum all the way and four antenna shape-endowing weight values obtains weight computing result A1
~A8.Wherein, A1=D1 × w1, A2=D1 × w2, A3=D1 × w3, A4=D1 × w4, A5=D2 × w5, A6=D2 × w6, A7=D2 ×
w7、A4=D2×w8。
Wherein, four antenna spacing of assignment, in 1/2 wavelength or so, with stronger correlation, are used in each circuit-switched data
The excipient of family signal can be realized by appropriate weighed combination, and because 90 degree of polarised direction is vertical between two groups of antennas, therefore
Mutually it is completely independent, D1, D2 two paths of data is carried respectively.
The excipient of signal can make the useful signal that sends in the air most strong direction alignment user, and be produced in other directions
Interference it is smaller.Correlation is stronger between four antennas of same polarised direction, therefore between four road signals（Or between data weights）
There is larger correlation.
Step 92, for the obtained weight computing result for corresponding respectively to different antennae, following Difference Calculation is carried out：
Delta2=D1W2-D1W1
Delta3=D1W3-D1W2
Delta4=D1W4-D1W3
Delta6=D2W6-D2W5
Delta7=D2W7-D2W6
Delta8=D2W8-D2W7
Wherein, Delta2 ~ Delta8 is referred to as Difference Calculation result.
Step 93, to benchmark weight computing result（A1, A5）With Difference Calculation result（Delta2~Delta8）Quantified
Processing；
Wherein, benchmark weight computing result is quantified using 16bit, partly in order to the quantitative graphs of signal are improved,
Base station demodulation ability is improved, on the other hand in view of existing in actual scene from the user with a distance from the near and far of base station simultaneously, i.e., pair
Should while there is large-and small-signal, it is therefore desirable to enough quantization bits are to meet dynamic range requirement（Large-and small-signal
Difference）And sufficient accuracy requirement is reached to the resolution ratio of small-signal.
Secondly, in actual data transfer, in the tunnels of Mei tetra- on the basis of the first circuit-switched data, it can still be passed using 16bit
Defeated initial data, for other three circuit-switched data, then only transmission and the difference value of reference data, the difference value due to fluctuation range compared with
It is small, smaller Nbit numbers can be used（N<16）To represent.
The numerical value for quantifying to use for Nbit, can be true according to required reduction rate ratio and the tolerable probability of error
It is fixed.In general, issuable error and correlation between actual signal is strong and weak and error of transmission generation, the latter mainly due to
A certain circuit-switched data error of transmission then causes follow-up several circuit-switched datas can not also recover normal on Ir interfaces, if wired optical fiber, typically
Bit error rate is 10（Minus 12 power）Hereinafter, error probability is smaller.Therefore it is strong and weak and to system to depend primarily on signal correlation
The influence of overall performance, it is however generally that, 8bit can characterize the big minor swing of 48dB scopes, and most of signal transformation range is all herein
Within the scope of.In general 8bit can characterize the big minor swing of 48dB scopes, most of signal excursion all this scope it
It is interior.
Step 94：By Ir interfaces will by performing step 93 obtained from quantized result mix be sent to RRU；
Step 95, RRU obtains eight circuit-switched datas, the respectively corresponding quantized result of A1, A5 and Delta2 ~ Delta8 correspondences
Quantized result so that on the basis of the corresponding quantized results of A1 and A5, according to the corresponding quantized results of Delta2 ~ Delta8 and
The relation of its quantized result corresponding with A1 or A5, recovers the corresponding quantized result of A2, A3, A4, A6, A7 and A8, so that most
A1 ~ A8 is recovered eventually, and flow terminates.
Using above-mentioned technical proposal, BBU is no longer to transmit many antennas by its Ir interface full dose between RRU to distinguish
The same circuit-switched data received, but using the data received by a certain antenna as benchmark, to other at least one antenna
The data received carry out residual quantity transmission, so that the mode transmitted relative to full dose, greatly reduces the real data of Ir interfaces
Transmission quantity.
In addition, the embodiment of the present invention also provides a kind of base station equipment as shown in Figure 10, including following functions unit：
Data acquiring unit 101, for obtaining multichannel data, wherein, each circuit-switched data is relative to each other；
Weight calculation unit 102, for according to antenna shape-endowing weight value set in advance, carrying out weights to each circuit-switched data respectively
Calculate, obtain each corresponding weight computing result；
Benchmark determining unit 103, for being determined at least in calculating obtained weight computing result from weight calculation unit 102
One benchmark weight computing result；
Difference value determining unit 104, for data acquiring unit 101 obtain in addition to the benchmark weight computing result
At least one other weight computing result as treating difference weight computing result, it is determined that treat difference weight computing result with from benchmark
The difference for the benchmark weight computing result specified in the benchmark weight computing result that determining unit 103 is determined；
Quantized result determining unit 105, for benchmark weight computing result, the difference determined according to benchmark determining unit 103
Be worth the difference that determining unit 104 is determined, and data acquiring unit 101 obtain except benchmark weight computing result and treating difference
Other weight computing results beyond fraction value result of calculation, obtain multichannel quantized result；
Transmitting element 106, for by Ir interfaces, the quantized result that quantized result determining unit 105 is obtained to be sent to
Other base station equipments.
Optionally, if assuming, the benchmark weight computing result determined from obtained weight computing result is one；And with
Other weight computing results described in one obtained are as treating difference weight computing result；And data acquiring unit 101 obtains N altogether
Circuit-switched data, and N>3；Then quantized result determining unit 105 can specifically include：
Mathematic interpolation subelement, for other weight computing knots in addition to the benchmark weight computing result for obtaining
Really, the difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained, wherein, it is described to treat
Difference weight computing result is the 1st weight computing result, and m takes satisfaction each more than or equal to 2 and less than or equal to N-1 successively
Natural number；
Quantify subelement, for according to quantify benchmark weight computing result, treat difference weight computing result and benchmark weights
The difference of result of calculation, and the N-2 difference that mathematic interpolation subelement is obtained, obtain multichannel quantized result.
Optionally, the quantized result determining unit specifically for：Based on default first quantification gradation, quantify benchmark power
Value result of calculation and obtain except benchmark weight computing result and other benchmark weights meters in addition to treating difference weight computing result
Result is calculated, and based on default second quantification gradation, quantifies the difference；
Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.
Meanwhile, the embodiment of the present invention also provides another base station equipment as shown in figure 11, including：
Receiving unit 111, for receiving multiple quantized results that other base station equipments are sent by Ir interfaces, wherein, institute
The different circuit-switched datas stated in multichannel data are relative to each other；
Determining unit 112, for according to the data recovery rule pre-set, from multiple amounts of the reception of receiving unit 111
Change and benchmark quantized result is determined in result；
Converting unit 113, is advised for the benchmark quantized result determined according to determining unit 112 and the data recovery
Then, other quantized results in addition to benchmark quantized result included in the multiple quantized result receiving unit 111 received,
It is respectively converted into corresponding weight computing result.
Optionally, corresponding to a kind of implementation of the function of determining unit 112, determining unit 112 can be specifically divided into
Following functions module：
First mark determining module, the mark for determining benchmark quantized result specified in data recovery rule；
Second mark determining module, the mark that each circuit-switched data for being transmitted from advance by Ir interfaces is set respectively
In, it is determined that the mark of the benchmark quantized result determined with the first mark determining module matches consistent mark；
Benchmark quantized result determining module, for from the multiple quantized result, determining module will to be identified with second true
The corresponding quantized result that identifies made is defined as benchmark quantized result.
In addition, the embodiment of the present invention also provides a kind of adjustment system of base station equipment interface rate, including first base station is set
Standby and the second base station equipment, wherein：
First base station equipment, for obtaining multichannel data, wherein, each circuit-switched data is relative to each other；According to day set in advance
Line shape-endowing weight value, carries out weight computing to each circuit-switched data respectively, obtains each corresponding weight computing result；From obtained weights
At least one benchmark weight computing result is determined in result of calculation, and to obtain in addition to the benchmark weight computing result extremely
Few other weight computing result as treating difference weight computing result, it is determined that treat difference weight computing result with from determination
The difference for the benchmark weight computing result specified in benchmark weight computing result；According to benchmark weight computing result, the difference
And obtain except benchmark weight computing result and other weight computing results in addition to treating difference weight computing result, obtain many
Road quantized result, and quantized result is sent to by the second base station equipment by Ir interfaces；
Second base station equipment, for receiving multiple quantized results that first base station equipment is sent by Ir interfaces, wherein, respectively
Individual quantized result is corresponding with each circuit-switched data in the multichannel data being relative to each other respectively；According to the data recovery rule pre-set
Then, benchmark quantized result is determined from the multiple quantized result；And according to the benchmark quantized result and the data recovery
Rule, other quantized results in addition to benchmark quantized result included in the multiple quantized result are respectively converted into corresponding
Weight computing result.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can be used in one or more computers for wherein including computer usable program code
Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program production of upper implementation
The form of product.
The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (18)
1. a kind of method of adjustment of base station equipment interface rate, it is characterised in that including：
First base station equipment obtains multichannel data；
According to antenna shape-endowing weight value set in advance, weight computing is carried out to each circuit-switched data respectively, each corresponding weights are obtained
Result of calculation；
At least one benchmark weight computing result is determined from obtained weight computing result, and to obtain except benchmark power
At least one other weight computing result outside value result of calculation is as difference weight computing result is treated, it is determined that treating difference weights meter
Calculate the difference of result and the benchmark weight computing result specified from the benchmark weight computing result of determination；
According to benchmark weight computing result, the difference and obtain except benchmark weight computing result and treat difference weight computing
As a result other weight computing results beyond, obtain multichannel quantized result, and be sent to the quantized result by Ir interfaces
Second base station equipment；
Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation.
2. the method as described in claim 1, it is characterised in that the benchmark weights meter determined from obtained weight computing result
It is one to calculate result；And using other weight computing results described in obtain one as treating difference weight computing result；And first
Base station equipment obtains N circuit-switched datas, and N altogether>3；Then
First base station equipment according to benchmark weight computing result, the difference and obtain except benchmark weight computing result and treating
Other weight computing results beyond difference weight computing result, obtain multichannel quantized result, specifically include：
First base station equipment is directed to obtained other weight computing results in addition to the benchmark weight computing result, calculates m
The difference of individual weight computing result and the m-1 weight computing result, obtains N-2 difference；Wherein, it is described to treat difference weights meter
It is the 1st weight computing result to calculate result, and m takes each natural number met more than or equal to 2 and less than or equal to N-1 successively；
First base station equipment quantifies benchmark weight computing result, treats the difference of difference weight computing result and benchmark weight computing result
Value, and the obtained N-2 difference, obtain multichannel quantized result.
3. the method as described in claim 1, it is characterised in that according to benchmark weight computing result, the difference and obtain
Except benchmark weight computing result and other weight computing results in addition to treating difference weight computing result, obtain multichannel and quantify knot
Really, specifically include：
First base station equipment is based on default first quantification gradation, quantifies benchmark weight computing result and obtains except benchmark weights
Result of calculation and treat other benchmark weight computing results beyond difference weight computing result, and quantify etc. based on default second
Level, quantifies the difference；
Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.
4. a kind of data processing method, it is characterised in that including：
Second base station equipment receives multiple quantized results that first base station equipment is sent by Ir interfaces；
According to the data recovery rule pre-set, benchmark quantized result is determined from the multiple quantized result；
And according to the benchmark quantized result and data recovery rule, benchmark is removed by what is included in the multiple quantized result
Other quantized results outside quantized result are respectively converted into corresponding weight computing result；
Wherein, the benchmark quantized result has correlation with described other quantized results in addition to benchmark quantized result.
5. method as claimed in claim 4, it is characterised in that the second base station equipment is advised according to the data recovery pre-set
Then, benchmark quantized result is determined from the multiple quantized result, is specifically included：
Second base station equipment determines the mark of benchmark quantized result specified in the data recovery rule；
From the mark set respectively for each circuit-switched data for being transmitted by Ir interfaces in advance, it is determined that with benchmark quantized result
The consistent mark of mark matching；And
From the multiple quantized result, by the corresponding quantization knot of the mark consistent with the mark matching of benchmark quantized result
Really, it is defined as benchmark quantized result.
6. the method as described in claim 4 or 5, it is characterised in that the quantized result is that first base station equipment is right according to its
Each circuit-switched data obtained carries out obtained each weight computing result of weight computing and determined；Then
The benchmark quantized result is at least one weights determined from described each weight computing result for calculating and obtaining
Result of calculation；And
In other quantized results in addition to the benchmark quantized result, at least one quantized result is：Except it is described at least one
Other weight computing result outside weight computing result and the datum quantity specified from the benchmark weight computing result of determination
Change the difference of result.
7. a kind of base station equipment, it is characterised in that including：
Data acquiring unit, for obtaining multichannel data；
Weight calculation unit, for according to antenna shape-endowing weight value set in advance, respectively for each of data acquiring unit acquisition
Circuit-switched data carries out weight computing, obtains each corresponding weight computing result；
Benchmark determining unit, for determining that at least one benchmark is weighed in calculating obtained weight computing result from weight calculation unit
It is worth result of calculation；
Difference value determining unit, at least one in addition to the benchmark weight computing result that is obtained with data acquiring unit its
His weight computing result is as treating difference weight computing result, it is determined that from treating that difference weight computing result and benchmark determining unit are true
The difference for the benchmark weight computing result specified in fixed benchmark weight computing result；
Quantized result determining unit, for determined according to benchmark determining unit benchmark weight computing result, difference value determining unit
Determine the difference, and data acquiring unit obtain except benchmark weight computing result and treat difference weight computing result with
Other outer weight computing results, obtain multichannel quantized result；
Transmitting element, is used for and by Ir interfaces, the quantized result that quantized result determining unit is obtained is sent to other base stations
Equipment；
Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation.
8. equipment as claimed in claim 7, it is characterised in that the benchmark weights meter determined from obtained weight computing result
It is one to calculate result；And using other weight computing results described in obtain one as treating difference weight computing result；And data
Obtaining unit obtains N circuit-switched datas, and N altogether>3；Then
The quantized result determining unit, is specifically included：
Mathematic interpolation subelement, for other weight computing results in addition to the benchmark weight computing result for obtaining,
The difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained, wherein, it is described to treat difference
Fraction value result of calculation is the 1st weight computing result, and m take successively meet more than or equal to 2 and less than or equal to N-1 it is each from
So count；
Quantify subelement, for according to quantify benchmark weight computing result, treat difference weight computing result and benchmark weight computing
As a result difference, and the N-2 difference that mathematic interpolation subelement is obtained, obtain multichannel quantized result.
9. equipment as claimed in claim 7, it is characterised in that the quantized result determining unit specifically for：Based on default
The first quantification gradation, quantify benchmark weight computing result and obtain except benchmark weight computing result and treating difference weight computing
As a result other benchmark weight computing results beyond, and based on default second quantification gradation, quantify the difference；
Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.
10. the equipment as described in claim 7~9 is any, it is characterised in that the quantized result is sent to other base stations and set
Standby base station equipment is baseband processing equipment BBU, and other described base station equipments are radio frequency remote equipment RRU；Or
The base station equipment that the quantized result is sent into other base station equipments is RRU, and other described base station equipments are BBU.
11. a kind of base station equipment, it is characterised in that including：
Receiving unit, for receiving multiple quantized results that other base station equipments are sent by Ir interfaces；
Determining unit, it is true in the multiple quantized results received from receiving unit for according to the data recovery rule pre-set
Determine benchmark quantized result；
Converting unit, for the benchmark quantized result determined according to determining unit and data recovery rule, will be received
Other quantized results in addition to benchmark quantized result included in the multiple quantized result that unit is received, are respectively converted into phase
The weight computing result answered；
Wherein, the benchmark quantized result has correlation with described other quantized results in addition to benchmark quantized result.
12. equipment as claimed in claim 11, it is characterised in that the determining unit is specifically included：
First mark determining module, the mark for determining benchmark quantized result specified in the data recovery rule；
In second mark determining module, the mark that each circuit-switched data for being transmitted from advance by Ir interfaces is set respectively,
It is determined that the mark of the benchmark quantized result determined with the first mark determining module matches consistent mark；
Benchmark quantized result determining module, for that from the multiple quantized result, will be determined with the second mark determining module
The corresponding quantized result of mark be defined as benchmark quantized result.
13. the equipment as described in claim 11 or 12, it is characterised in that the quantized result is first base station equipment according to it
Each weight computing result that each circuit-switched data progress weight computing of acquisition is obtained is determined；Then
The benchmark quantized result is at least one weights determined from described each weight computing result for calculating and obtaining
Result of calculation；And
In other quantized results in addition to the benchmark quantized result, at least one quantized result is：Except it is described at least one
Other weight computing result outside weight computing result and the datum quantity specified from the benchmark weight computing result of determination
Change the difference of result.
14. the equipment as described in claim 11 or 12, it is characterised in that receive the quantization knot of other base station equipments transmission
The base station equipment of fruit is BBU, and other described base station equipments are radio frequency remote equipment RRU；Or
The base station equipment for receiving the quantized result of other base station equipments transmission is RRU, and other described base station equipments are radio frequency
Remote device BBU.
15. a kind of adjustment system of base station equipment interface rate, it is characterised in that set including first base station equipment and the second base station
It is standby, wherein：
First base station equipment, for obtaining multichannel data；According to antenna shape-endowing weight value set in advance, each circuit-switched data is entered respectively
Row weight computing, obtains each corresponding weight computing result；At least one benchmark is determined from obtained weight computing result
Weight computing result, and using obtained at least one other weight computing result in addition to the benchmark weight computing result as
Difference weight computing result is treated, it is determined that treating difference weight computing result and the base specified from the benchmark weight computing result of determination
The difference of quasi- weight computing result；According to benchmark weight computing result, the difference and obtain remove benchmark weight computing knot
Fruit and treat other weight computing results beyond difference weight computing result, obtain multichannel quantized result, and pass through Ir interfaces will
The quantized result is sent to the second base station equipment；
Second base station equipment, for receiving multiple quantized results that first base station equipment is sent by Ir interfaces；According to setting in advance
The data recovery rule put, determines benchmark quantized result from the multiple quantized result；And according to the benchmark quantized result
With data recovery rule, other quantized results in addition to benchmark quantized result included in the multiple quantized result are divided
Corresponding weight computing result is not converted to；
Wherein, the benchmark weight computing result is with treating that difference weight computing result has correlation；The benchmark quantized result
There is correlation with described other quantized results in addition to benchmark quantized result.
16. system as claimed in claim 15, it is characterised in that the benchmark weights determined from obtained weight computing result
Result of calculation is one；And using other weight computing results described in obtain one as treating difference weight computing result；And the
One base station equipment obtains N circuit-switched datas, and N altogether>3；Then
First base station equipment specifically for：For obtained other weight computing knots in addition to the benchmark weight computing result
Really, the difference of m-th of weight computing result and the m-1 weight computing result is calculated, N-2 difference is obtained；Wherein, it is described to treat
Difference weight computing result is the 1st weight computing result, and m takes satisfaction each more than or equal to 2 and less than or equal to N-1 successively
Natural number；And quantify benchmark weight computing result, treat the difference of difference weight computing result and benchmark weight computing result, and
The obtained N-2 difference, obtains multiple quantized results.
17. system as claimed in claim 15, it is characterised in that first base station equipment specifically for：
Based on default first quantification gradation, quantify benchmark weight computing result and obtain except benchmark weight computing result and treat
Other benchmark weight computing results beyond difference weight computing result, and based on default second quantification gradation, quantify described
Difference；
Wherein, the second quantification gradation is the predetermined reduction ratio setting of the bearer rate according to the Ir interfaces.
18. the system as described in claim 15~17 is any, it is characterised in that the first base station equipment is RRU, described the
Two base station equipments are BBU；Or
The first base station equipment is BBU, and second base station equipment is RRU.
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| KR20070003543A (en) * | 2005-06-30 | 2007-01-05 | 엘지전자 주식회사 | Clipping restoration by residual coding |
| CN101449516A (en) * | 2006-03-17 | 2009-06-03 | Lg电子株式会社 | Method for transforming data, and method for transmitting and receiving data using the same |
| CN102291855A (en) * | 2010-06-18 | 2011-12-21 | 普天信息技术研究院有限公司 | Method for reducing infrared ray (Ir) interface bandwidth and distributive base station |
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| KR20070003543A (en) * | 2005-06-30 | 2007-01-05 | 엘지전자 주식회사 | Clipping restoration by residual coding |
| CN101449516A (en) * | 2006-03-17 | 2009-06-03 | Lg电子株式会社 | Method for transforming data, and method for transmitting and receiving data using the same |
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