CN202268895U - Data compression transmission system - Google Patents
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- CN202268895U CN202268895U CN2011201704028U CN201120170402U CN202268895U CN 202268895 U CN202268895 U CN 202268895U CN 2011201704028 U CN2011201704028 U CN 2011201704028U CN 201120170402 U CN201120170402 U CN 201120170402U CN 202268895 U CN202268895 U CN 202268895U
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Abstract
The utility model provides a data compression transmission system, comprising a compression module, wherein the compression module comprises a sampling module for sampling the output signal at an interval of the predetermined length; a signal characteristic detection module for detecting a signal intensity value of the sampled output signal, looking up a preset contrast table according to the detected signal intensity value and acquiring the corresponding signal characteristic information; and a first compression sub-module for capturing a characteristic signal from the output signal according to the position information of the characteristic signal, and combining the signal characteristic information with the characteristic signal to form a first compression signal; the sampling module, the signal characteristic detection module and the first compression sub-module are connected in order. The data compression transmission system of the utility model is capable of reducing occupation for transmission bandwidth when the characteristic information is transmitted, so the signal transmission cost is lowered.
Description
Technical field
The utility model relates to the signal transmission technology field, relates in particular to a kind of data compression transmission system.
Background technology
In recent years; The fast development of China's mobile communication cause, the radio network optimization and the network coverage and have day by day shown its importance, wherein; Radio frequency stretch system with cost of investment that it was had low with characteristics such as increase coverage territory rapidly, be widely used.But at present radio frequency stretch system is to adopt the transparent transmission mode mostly: promptly the downstream signal link the base station come signal digitalized after, pass to remote equipment through optical fiber or microwave, be transmitted to the user through after the digital-to-analogue conversion again; Up link is returned proximal device to user data transmission and is sent to the base station after the digital-to-analogue conversion again.Continuous expansion along with network coverage; Need the baseband I Q data increase at double of transmission; The bandwidth of the data transfer bandwidth of the fiber optic network of backbone network or microwave data transmission backbone network must increase in this case, could satisfy the transfer of data demand that the data increase brings.Fiberoptical networking, the transmission bandwidth increase of microwave networking will inevitably increase the cost of equipment, and the power consumption of synchronous signal transmission equipment also can increase.
The utility model content
The technical problem that the utility model will solve is to provide a kind of data compression transmission system that can reduce the signal transmission cost.Extract the characteristic information of the main information of record in the signal that transmits; Replace the whole signal of transmission to transmit said characteristic information; And, to the taking of transmission bandwidth, reduce the cost of signal transmission when further reducing the said characteristic information of transmission in addition mark and the compression of said characteristic information.
A kind of data compression transmission system comprises compression module, and said compression module comprises: serve as the decimation blocks of at interval said output signal being sampled with said predetermined length; The signal strength values of the output signal that judgement sampling is obtained is searched the predefined table of comparisons according to the signal strength values of judging acquisition, obtains the signal characteristic judge module of corresponding said signal characteristic information; And according to the positional information of said characteristic signal, intercepting characteristic signal in said output signal is combined into said signal characteristic information and said characteristic signal the first compression submodule of first compressed signal; Said decimation blocks, said signal characteristic judge module and the said first compression submodule are connected successively.
Further; Said data compression transmission system is included in the decompression module of signal receiving end; Said decompression module comprises: according to the compound mode of said signal characteristic information and said characteristic signal, from said first compressed signal, extract the signal characteristic extraction module of said signal characteristic information and said characteristic signal respectively; Search the said table of comparisons according to said signal characteristic information, obtain the module of searching of the positional information of said characteristic signal in original output signal; According to said positional information and to exporting the said predetermined length of signal sampling, the first decompression submodule that said characteristic signal is carried out the signal reduction; Said signal characteristic extraction module, the said module of searching are connected with the said first decompression submodule successively.
Compared with prior art; In the data compression transmission system of the utility model; Through setting up signal strength values and the signal characteristic information position table of comparisons one to one; Can obtain the position of corresponding signal characteristic information according to the intensity of output signal, in said output signal, extract said characteristic signal.The characteristic signal that had both comprised said output signal through first packed data that said signal characteristic information and said characteristic signal are combined into; Comprise the position of said characteristic signal again at original output signal; Therefore, can represent whole output signal through said first compressed signal.Said first compressed signal is further compressed, then can further improve the efficient of transmission data, minimizing takies transmission bandwidth, reduces the cost of signal transmission.
When receiving as the recipient through said second packed data after the processed compressed; Obtain first compressed signal through preliminary decompress(ion); Characteristic signal and signal characteristic information through comprising in said first compressed signal again; Signal bits except that said characteristic signal is carried out signal fill, reduce said output signal, promptly can farthest reduce the distortion of reduction output signal.
For the wireless coverage close quarters, can not effectively solve the professional problem that increases the bandwidth increase that brings to traditional transparent transmission mode.Data compression transmission method of the utility model and system thereof satisfy because the transmission problem that the data business volume increase brings on the basis that does not increase the existing equipment transmission bandwidth.Through data compression and data recovery technique, under the prerequisite that does not influence signal quality, reduce the user data transmission amount, thereby in limited bandwidth, transmit the data of more users.Reduce product cost, be fit to the marketization and use.
Be applicable to the mobile communication wireless access technology, particularly base band data in the radio frequency stretch system compressed and decompress(ion), also can be applicable to microwave transmission system, in the fiber optic transmission system data are compressed with data and recover.
Description of drawings
Fig. 1 is the structural representation of the compression module of the utility model data compression transmission system;
Fig. 2 is the flow chart of steps that the utility model data compression transmission system is searched the table of comparisons;
Fig. 3 is the sketch map of the utility model data compression transmission system intercepting characteristic signal method;
Fig. 4 is the sketch map that the utility model data compression transmission system forms the data combination mode of first compressed signal;
Fig. 5 is the structural representation of a kind of preferred implementation of compression module of the data compression transmission system of the utility model;
Fig. 6 is the structural representation of decompression module of the data compression transmission system of the utility model;
Fig. 7 is the structural representation of a kind of preferred implementation of decompression module of the data compression transmission system of the utility model;
Fig. 8 is a kind of structural representation of preferred implementation of the data compression transmission system of the utility model;
Fig. 9-the 11st, the schematic diagram that the data compression transmission system of the utility model is used in radio frequency stretch system;
Figure 12 is the schematic diagram of traditional radio frequency stretch system down channel.
Embodiment
See also Fig. 1, Fig. 1 is the structural representation of the compression module of the utility model data compression transmission system.The data compression transmission system of the utility model comprises and is arranged on signal sending end, the compression module that the output signal is carried out data compression.Said compression module comprises:
With said predetermined length is the decimation blocks 11 of at interval said output signal being sampled; The signal strength values of the output signal that judgement sampling is obtained is searched the predefined table of comparisons according to the signal strength values of judging acquisition, obtains the signal characteristic judge module 12 of corresponding said signal characteristic information; And according to the positional information of said characteristic signal, intercepting characteristic signal in said output signal is combined into said signal characteristic information and said characteristic signal the first compression submodule 13 of first compressed signal; Said decimation blocks 11, said signal characteristic judge module 12 and the said first compression submodule 13 are connected successively.
Said decimation blocks 11 serves as at interval said output signal to be sampled with said predetermined length.
The signal strength values of the output signal that said signal characteristic judge module 12 judgement samplings are obtained is searched the predefined table of comparisons according to the signal strength values of judging acquisition, obtains corresponding said signal characteristic information; Wherein, the said predefined table of comparisons comprises preset output signal strength value and signal characteristic information, and said signal characteristic information comprises the positional information of the characteristic signal in the output signal with predetermined length;
The said first compression submodule 13 is according to the positional information of characteristic signal described in the said signal characteristic information, and intercepting characteristic signal in said output signal is combined into first compressed signal with said signal characteristic information and said characteristic signal.
Wherein, The one-to-one relationship of the said signal characteristic information of putting down in writing in the predefined said table of comparisons in the said signal characteristic judge module 12 and the intensity level of said output signal; The probability that specifically can appear at diverse location according to the characteristic signal in the output signal of various varying strengths is set; The mass data statistical fit that in long-term equipment debugging, obtains can obtain above-mentioned probabilistic information, and the positional information that the probability of characteristic signal appearance is higher is as the positional information of said characteristic signal.
Particularly; The threshold value of supposing the intensity level of signal is N; And said signal characteristic information is expressed as M the data bit of said characteristic signal in the output signal; In the then said table of comparisons default settings threshold value of n intensity level (number of n can according to target compression ratio confirm), be designated as N0, N2, N3......; And with the corresponding signal characteristic information of threshold value of a said n intensity level be M1, M2, M3.......And greater than N0 during less than N1, corresponding said signal characteristic information is M1 at signal strength values; Greater than N1 during less than N2, corresponding said signal characteristic information is M2...... at signal strength values during greater than Nn at signal strength values, and corresponding said signal characteristic information is Mn+1.
When detecting the output signal, serves as at interval said output signal to be sampled with said predetermined length in said decimation blocks 11.When specifically setting the predetermined length in said sampling interval, both can scheduled time length set, also can tentation data (or signal) length set.When the sampling interval was very little, it was starting point that the output signal strength value of sampling is with the sampling time, had the intensity level of the output signal of said predetermined length.
Said signal characteristic judge module 12 is searched the said table of comparisons according to the signal strength values of judging acquisition, obtains corresponding said signal characteristic information;
Usually, the said table of comparisons is that a plurality of preset signal strength signal intensities are interval, the interval respectively corresponding said signal characteristic information of each said signal strength signal intensity.Therefore, said signal characteristic judge module 12 judges that according to the signal strength values of said output signal the signal strength signal intensity at its place is interval when searching the said table of comparisons, obtains in the said table of comparisons and the interval corresponding said signal characteristic information of said signal strength signal intensity.Can search said signal characteristic information corresponding in the said table of comparisons through searching the interval mode of each said signal strength signal intensity step by step.
The mode of specifically searching the said table of comparisons can be to search step by step, and is for example shown in Figure 2, at first relatively judges the signal strength values of the output signal that obtains and the size of N1; If greater than N1, the size of itself and N2 relatively more then; If greater than N2, then continue relatively itself and the size of N3 ... in the process of above-mentioned comparison, if greater than N1, and less than N2, the said signal characteristic information that then obtains correspondence is M1; If greater than N2, and less than N3, then obtaining corresponding said signal characteristic information is M2......
In this execution mode; The said first compression submodule 13 is in said output signal during the intercepting characteristic signal; Set the signal intercepting window of an activity; Said signal intercepting window has predetermined data length, when concrete data length can be according to said output signal sampling predetermined length at interval set, being standard setting less than said predetermined length and principal character signal that can the said output signal of intercepting.The said first compression submodule 13 is according to said signal characteristic information; Promptly can confirm the position of said characteristic signal in the output signal of said predetermined length; In the output signal of said predetermined length, be starting point with said position, carry out the signal intercepting with said signal intercepting window; Obtain the characteristic signal in the said output signal, as shown in Figure 3.The glide direction of said signal intercepting window and the position of slip are determined by said signal characteristic information.
Further; The data bit that can use said signal characteristic information to comprise in the said first compression submodule 13 is represented the width of said signal intercepting window; Promptly; If M representes with 4bit, said signal intercepting window window width just is that 24 powers are 16, and window width is 16bit so.
After obtaining corresponding said signal characteristic information, the said first compression submodule 13 is combined into first compressed signal with said signal characteristic information and said characteristic signal;
In this execution mode; The said first compression submodule 13 can adopt following multiple compound mode that said signal characteristic information is combined into first compressed signal with said characteristic signal: convert said signal characteristic information to the data mode identical with said characteristic signal, be added on the front end or the rear end of said characteristic signal then; Or, said signal characteristic information is inserted into the precalculated position in the said characteristic signal; Or, said signal characteristic information and said characteristic signal are interweaved or the like in a predefined manner, as shown in Figure 4.If said signal characteristic information directly is inserted into the precalculated position in the said characteristic signal, such processing mode is fairly simple, but antijamming capability is relatively poor, in case have to disturb said signal characteristic information is changed, just can't restore data.The processing mode antijamming capability that predetermined way interweaves is stronger, even there is interference also just to disturb the sub-fraction of said signal characteristic information, the benefit that interweaves is exactly wrong equalization.
Compared with prior art; In the data compression transmission system of the utility model; Through in said signal characteristic judge module 12, setting up signal strength values and the signal characteristic information position table of comparisons one to one; Can obtain the position of corresponding signal characteristic information according to the intensity of output signal, in said output signal, extract said characteristic signal.First packed data that said signal characteristic information and said characteristic signal is combined into through the said first compression submodule 13 had both comprised the characteristic signal of said output signal; Comprise the position of said characteristic signal again at original output signal; Therefore, can represent whole output signal through said first compressed signal.Improve the efficient of transmission data, minimizing takies transmission bandwidth, reduces the cost of signal transmission.
See also Fig. 5, Fig. 5 is the structural representation of a kind of preferred implementation of compression module of the data compression transmission system of the utility model.
As a kind of preferred implementation, the data compression transmission system of the utility model also comprises:
The second compression submodule 14, the said second compression submodule 14 connects the said first compression submodule 13, is used for according to predetermined compression ratio said first compressed signal being carried out data compression, obtains second compressed signal, and exports said second compressed signal.
Predefined said predetermined compression ratio can be by the user according to signal channel transmitted bandwidth in the said second compression submodule 14, and target data transmission rate etc. are concrete to be set.Data compression in the said second compression submodule 14 can be taked various compress modes commonly used in the prior art.
As a kind of preferred implementation; In the said second compression submodule 14, said first compressed signal is carried out the data from the sample survey compression; Promptly in distorted signals in tolerance interval; With certain sampling interval sampling, the signal that obtains to sample is as said second compressed signal to said first compressed signal.After data compression was accomplished, said second compressed signal of the said second compression submodule, 14 outputs was as the signal of the final output of signal sending end.
Further compress through 14 pairs of said first compressed signals of the said second compression submodule, then can further improve the efficient of transmission data, minimizing takies transmission bandwidth, reduces the cost of signal transmission.
In this execution mode, said data compression transmission system also comprises: the rate-matched module 15 that is used to adjust the data rate of said output signal.
Said rate-matched module 15 comes the data rate of said output signal is adjusted according to the speed that said output signal is sampled, and makes it to meet the requirement that said output signal is sampled; Perhaps the Signal Processing rate request is regulated according to each module of back.Adjust the data rate of said output signal in advance, can sample to said output signal more accurately, accurately judge signal strength values.
For example; The speed of said output signal is B; And the rate requirement that 11 pairs of said output signals of said decimation blocks are sampled is A, in the then said rate-matched module 15, produces an adjustment coefficient A/B said output signal is carried out the speed adjustment; Make B (A/B), producing fixed rate is the output signal of A.Said adjustment coefficient can be the speed according to pending said output signal, and targeted rate disposes automatically, also can be set by the user.
Further, the data compression transmission system of the utility model also comprises the filtration module 16 that said output signal is carried out filtering.Said filtration module 16 can be provided with said rate-matched module 15 simultaneously, also can distinguish independent setting.Said filtration module 16 can be arranged on before or after the said rate-matched module 15, said output signal is carried out filtering disturb to eliminate, for the data compression process of back is done early-stage preparations.
The data compression transmission system of the utility model can also comprise: the decompression module that the signal that transmitting terminal is sent at signal receiving end decompresses.
See also Fig. 6, Fig. 6 is the structural representation of decompression module of the data compression transmission system of the utility model.Said decompression module comprises:
According to the compound mode of said signal characteristic information and said characteristic signal, from said first compressed signal, extract the signal characteristic extraction module 21 of said signal characteristic information and said characteristic signal respectively;
Search the said table of comparisons according to said signal characteristic information, that obtains the positional information of said characteristic signal in original output signal searches module 22;
According to said positional information and to exporting the said predetermined length of signal sampling, the first decompression submodule 23 that said characteristic signal is carried out the signal reduction;
Said signal characteristic extraction module 21, the said module 22 of searching are connected with the said first decompression submodule 23 successively.
If the said second compression submodule 14 is set the said first compressed signal second-compressed is become said second compressed signal at signal output part.Then, the said decompression module that is arranged on signal receiving end also comprises and is used to receive second compressed signal, according to said predetermined compression ratio, said second compressed signal is separated the second decompression submodule 24 that is pressed into said first compressed signal.As shown in Figure 7.
The said second decompression submodule 24 carries out the contrary processing procedure of data compression with the said second compression submodule 14; The said second decompression submodule 24 is according to the said predetermined compression ratio in the said second compression submodule 14; Said second compressed signal is decompressed; If what carry out in the submodule 14 in said second compression is the sampling compression, 24 pairs of said second compressed signals of the then said second decompression submodule carry out data fills, and reduces said first compressed signal.
Said signal characteristic extraction module 21 is used for the compound mode according to said signal characteristic information and said characteristic signal, from said first compressed signal, extracts said signal characteristic information and said characteristic signal respectively;
In order from the signal that receives, to extract the said output signal of reduction again, need from said first compressed signal, extract said signal characteristic information respectively.Therefore, said signal characteristic extraction module 21 is according to the said signal characteristic information in the said first compression submodule 13 and the compound mode of said characteristic signal, from said signal characteristic information of new extraction and said characteristic signal.
Promptly; If in the said first compression submodule 13 said signal characteristic information is added on the front end or the rear end of said characteristic signal; Or precalculated position; Then said signal characteristic extraction module 21 is correspondingly from the front end or the rear end of said first compressed signal of correspondence, or the precalculated position extracts said signal characteristic information, thereby can obtain said characteristic signal.
If signal characteristic information and said characteristic signal interweave in a predefined manner described in the said first compression submodule 13; Then said signal characteristic extraction module 21 is according to said predetermined interleaving mode; Said first compressed signal is carried out deinterleaving, can obtain said signal characteristic information and said characteristic signal respectively.
In said signal characteristic extraction module 21; Can also set at first said first compressed signal respectively with multiple predetermined data combination mode poll; Signal characteristic information and characteristic signal with in definite said first compressed signal make up in which way, thus the data that extraction needs from said first compressed signal exactly.
The said module 22 of searching is used for searching the said table of comparisons according to said signal characteristic information, obtains the positional information of said characteristic signal in original output signal.
The said first decompression submodule 23 carries out the signal reduction according to said positional information and to exporting the said predetermined length of signal sampling to said characteristic signal.
In the said first decompression submodule 23, can be according to said positional information, carry out signal to other data bit except that said characteristic signal in the said original output signal and fill, reduce said output signal.
As a kind of preferred implementation, also comprise the decompressed data rate-matched module (figure does not show) of the data rate that can adjust said second compressed signal in the said decompression module.Said decompressed data rate-matched module can be arranged on before the said second decompression submodule 24; According to said decompression module the processing speed of said second compressed signal is required the data rate of said output signal is adjusted, make it the speed of the data processing of The profile.So can improve the applicability that said second compressed signal is decompressed, the accuracy of the data processing after improving.
Therefore; In the data compression transmission system of the utility model, when receiving as the recipient, obtain first compressed signal through preliminary decompress(ion) through said second packed data after the processed compressed; Characteristic signal and signal characteristic information through comprising in said first compressed signal again; Signal bits except that said characteristic signal is carried out signal fill, reduce said output signal, promptly can farthest reduce the distortion of reduction output signal.
Further; As shown in Figure 8, in the data compression transmission system of the utility model said compression module and said decompression module can be set simultaneously, in addition; Also be provided with self application and select module 25, said self application selects module 25 to be used for when the output signal, opening said compression module; When receiving signal, open said decompression module.
Data compression transmission method of the utility model and data compression transmission system as required can flexible Application in each link of conventional radio frequency far-drawing system signal processing; Just can in each signal processing link, compress and decompression signal; Improve the efficient of transmission data; Minimizing takies transmission bandwidth, reduces the cost of signal transmission, shown in Fig. 9-11.
Please consult Figure 12 in the lump, Figure 12 is the schematic diagram of traditional radio frequency stretch system down channel.The data of proximal device ADC sampling become the IQ data through after the down-converted, the transmitted bit multiplication, and the bit number of the more transmission of carrier wave also is multiplied simultaneously.The IQ data change into the suitable data bag after the host-host protocol packing, via the optical fiber processing unit data are processed into the data flow that is fit to Optical Fiber Transmission after Optical Fiber Transmission arrives remote equipment.Remote equipment is to the inverse process that reverts to proximal device of signal.Therefore optical fiber transparent transmission IQ data or ADC sampling back data need very high fiber bandwidth could satisfy transmission requirement.
After the data compression transmission system that adds the utility model; With Figure 10 is example: the IQ data to being multiplied after the down-conversion are effectively compressed; Pass through Optical Fiber Transmission again; Decompress at receiving terminal, can reduce the requirements for transmission of optical fiber, can save bandwidth simultaneously and be used to transmit more carrier wave or other data services.
The utility model discloses a kind of data compression transmission technology that is applied to base band data in the radio frequency stretch system; The analog if signal input forms digital medium-frequency signal through A/D converter, and data compression transmission method of process the utility model or system carry out signal characteristic and judge; Generate signal characteristic information; And, carry out the compression of corresponding bits stream information, and then realize data compression process according to said signal characteristic information and predetermined compression ratio.Receiving terminal carries out the inverse process restoring data of compression end to signal simultaneously.The utility model processing delay is short, and real-time is good, and system constitutes simple, and signal is near undistorted.Have good transplantability, upgrade different N-M correspondence table and promptly can be applicable in the communication systems such as GSM, WCDMA, TD-SCDMA.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.
Claims (7)
1. a data compression transmission system is characterized in that comprising compression module, and said compression module comprises:
With said predetermined length is the decimation blocks of at interval said output signal being sampled;
The signal strength values of the output signal that judgement sampling is obtained is searched the predefined table of comparisons according to the signal strength values of judging acquisition, obtains the signal characteristic judge module of corresponding said signal characteristic information;
And according to the positional information of said characteristic signal, intercepting characteristic signal in said output signal is combined into said signal characteristic information and said characteristic signal the first compression submodule of first compressed signal;
Said decimation blocks, said signal characteristic judge module and the said first compression submodule are connected successively.
2. data compression transmission system as claimed in claim 1 is characterized in that, further comprises:
According to predetermined compression ratio, said first compressed signal is carried out data compression, obtain the second compression submodule of second compressed signal;
The said second compression submodule connects the said first compression submodule.
3. data compression transmission system as claimed in claim 1 is characterized in that, further comprises decompression module, and said decompression module comprises:
According to the compound mode of said signal characteristic information and said characteristic signal, from said first compressed signal, extract the signal characteristic extraction module of said signal characteristic information and said characteristic signal respectively;
Search the said table of comparisons according to said signal characteristic information, obtain the module of searching of the positional information of said characteristic signal in original output signal;
According to said positional information and to exporting the said predetermined length of signal sampling, the first decompression submodule that said characteristic signal is carried out the signal reduction;
Said signal characteristic extraction module, the said module of searching are connected with the said first decompression submodule successively.
4. data compression transmission system as claimed in claim 3 is characterized in that, further comprises:
According to predetermined compression ratio, said first compressed signal is carried out data compression, obtain the second compression submodule of second compressed signal;
And, receive said second compressed signal, according to said predetermined compression ratio, said second compressed signal is separated the second decompression submodule that is pressed into said first compressed signal.
5. data compression transmission system as claimed in claim 4 is characterized in that, said decompression module further comprises:
Second compressed signal that receives is carried out the decompressed data rate-matched module of rate adaptation.
6. like any described data compression transmission system in the claim 1 to 5, it is characterized in that said compression module further comprises:
Adjust the rate-matched module of the data rate of said output signal;
And/or, to exporting the filtration module that signal carries out filtering.
7. like any described data compression transmission system in the claim 3 to 5; It is characterized in that; Said data compression transmission system further comprises: when the output signal, open said compression module, when receiving signal, open the self application of said decompression module and select module.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833000A (en) * | 2012-08-14 | 2012-12-19 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN112260999A (en) * | 2020-09-24 | 2021-01-22 | 江苏新安电器股份有限公司 | Compressed data transmission method for automatic test equipment |
-
2011
- 2011-05-25 CN CN2011201704028U patent/CN202268895U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833000A (en) * | 2012-08-14 | 2012-12-19 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN102833000B (en) * | 2012-08-14 | 2015-06-17 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN112260999A (en) * | 2020-09-24 | 2021-01-22 | 江苏新安电器股份有限公司 | Compressed data transmission method for automatic test equipment |
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