CN106788883A - Data transmission method and transmission system - Google Patents
Data transmission method and transmission system Download PDFInfo
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- CN106788883A CN106788883A CN201611099513.8A CN201611099513A CN106788883A CN 106788883 A CN106788883 A CN 106788883A CN 201611099513 A CN201611099513 A CN 201611099513A CN 106788883 A CN106788883 A CN 106788883A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
Abstract
A kind of data transmission method and Transmission system, the transmission method include：The primary data that data processing end sends is received, the primary data is demodulated, obtain the first demodulating data；First demodulating data is decoded, the first alternate data is obtained；When the first alternate data has error code, can judgement voluntarily be corrected, if it can, after voluntarily being corrected to the first alternate data, will correct result as reception data；Otherwise, repeat requests are sent to data processing end, and the re-transmission data corresponding with repeat requests that data processing end sends is demodulated, obtain the second demodulating data；Second demodulating data is merged with the first demodulating data, to the data decoding after merging, is obtained according to decoded result and is received data.Above-mentioned transmission method can improve the accuracy rate that data are received determined by user terminal.
Description
Technical field
The present invention relates to Wireless Data Transmission field, more particularly to a kind of data transmission method and Transmission system.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, OFDM) is many one kind
Carrier modulation technique：Some orthogonal sub-channels are broken a channel into, high-speed data signal are converted into parallel low speed sub-data flow,
Modulate and be transmitted on each of the sub-channels.FEC (Forward Error Correction, forward error correction) is a kind of data
Coding techniques, error detection is verified by receiving terminal in transmission, and in FEC modes, receiving terminal can not only find mistake, and can be
The position that binary element makes a mistake is determined to a certain extent, so as to be corrected.FEC modes must use error correcting code, and
And find that mistake need not notify that sender retransmits.
In the prior art, in the OFDM baseband system based on FEC mechanism, data processing end to the data encoding that collects simultaneously
After modulation, sent to user terminal by channel, whether user terminal is demodulated to data, decodes, and judges decoded data
There is error code；Can be corrected if there is error code and voluntarily, user terminal then decoded data are voluntarily corrected after conduct
Data are received, to carry out follow-up treatment；And for can not voluntarily correct, user terminal then can be using decoded data as connecing
Data are received, to carry out follow-up treatment.
In the case where channel circumstance is relatively more severe, for example：Interchannel noise serious interference, user terminal obtains decoding data
In the presence of serious error code, beyond the scope voluntarily corrected, user terminal is caused voluntarily to correct error code data, then user terminal
Identified reception data accuracy reduction, can make a big impact to follow-up treatment work.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of data transmission method and Transmission system, improve user terminal
The identified accuracy rate for receiving data.
In order to solve the above problems, the invention provides a kind of data transmission method, including：Data processing end is received to send
Primary data, the primary data is demodulated, obtain the first demodulating data；First demodulating data is decoded, is obtained
To the first alternate data；When the first alternate data has error code, can judgement voluntarily be corrected, if it can, to the first alternative number
After voluntarily correcting, result as reception data will be corrected；Otherwise, to data processing end send repeat requests, and to data at
The re-transmission data corresponding with repeat requests that reason end sends are demodulated, and obtain the second demodulating data；By the second demodulating data
Merged with the first demodulating data, to the data decoding after merging, obtained according to decoded result and receive data.
Optionally, the data segment for retransmitting data and primary data puts in order difference.
Optionally, the method that the re-transmission data corresponding with repeat requests that data processing end sends are demodulated
Including：The data segment of the re-transmission data corresponding with repeat requests that data processing end is sent puts in order and is reduced to initial number
According to data segment put in order；The re-transmission data exchanged after entire data section order are demodulated.
Optionally, it is described to include the method that the second demodulating data is merged with the first demodulating data：By the first demodulation
The data data segment corresponding with the second demodulating data is added.
Optionally, the data decoding after described pair of merging, includes according to the method that decoded result obtains reception data：Pairing
And after data decoded, obtain the second alternate data；When the second alternate data has error code, can judgement voluntarily entangle
Just, if it can, after then the second alternate data is voluntarily corrected, result as reception data will be corrected；Otherwise, by the second alternative number
According to as reception data.
To solve the above problems, technical scheme also provides a kind of data transmission system, including：Receiving unit,
First demodulating unit, the first alternate data obtaining unit, first receive data acquiring unit, retransmission unit, the second demodulating unit,
Combining unit, second receive data acquiring unit；Receiving unit, primary data and re-transmission for receiving the transmission of data processing end
Data；First demodulating unit, the primary data for receiving unit to be received is demodulated, and obtains the first demodulating data；The
One alternate data obtaining unit, for the first demodulating data that the first demodulating unit is obtained to be decoded, obtains first alternative
Data；First receives data acquiring unit, for when the first alternate data has error code, voluntarily being corrected to the first alternate data
Afterwards, result as reception data will be corrected；If cannot voluntarily change just, triggering retransmission unit sends weight to data processing end
Pass request；Second demodulating unit, the re-transmission data for receiving unit to be received are demodulated, and obtain the second demodulating data；
Combining unit, for the second demodulating data to be merged with the first demodulating data；Second receives data acquiring unit, for right
Data decoding after merging, obtains according to decoded result and receives data.
Optionally, the data segment for retransmitting data and primary data puts in order difference.
Optionally, second demodulating unit, specifically includes：Order adjustment subelement, for receiving unit to be received
The data segment of re-transmission data put in order and be reduced to the data segment of primary data and put in order；Second demodulation subelement, is used for
The re-transmission data after data segment order will be adjusted to be demodulated, as the second demodulating data.
Optionally, the combining unit concrete configuration is：For the first demodulating data and the second demodulating data is corresponding
Data segment be added.
Optionally, described second data acquiring unit is received, is specifically included：Second alternate data obtains subelement, is used for
Data after merging are decoded, the second alternate data is obtained；Second receives data obtains subelement, for alternative second
When data have error code, after voluntarily being corrected to the second alternate data, result as reception data will be corrected；If cannot voluntarily entangle
Just, then using the second alternate data as reception data.
The present invention taken into full account the influence suffered by data each data segment transmitted in the case of bad channel it is different with
And uplink and downlink timeslot differs the most probably constant situation of very short, channel conditions, when user terminal detects that the first alternate data is present
During the error code that can not voluntarily correct, then may require that data processing end is retransmitted；Data processing end is then by each number of primary data
As re-transmission data after changing according to the order of section；At the up channel moment, data processing end will retransmit data is activation to user terminal,
User terminal is demodulated data are retransmitted, and merges with the first demodulating data, then decodes, and is determined to receive number according to decoded result
According to can so effectively improve the accuracy rate that data are received determined by user terminal.
Brief description of the drawings
Fig. 1 is the data transmission method flow chart of the embodiment of the invention；
Fig. 2 is the data transmission method flow chart of the embodiment of the invention；
Fig. 3 is the data transmission system structural representation of the embodiment of the invention；
Fig. 4 is the structural representation of the second demodulating unit of the data transmission system of the embodiment of the invention；
Fig. 5 shows for the structure of the second reception data acquiring unit of the data transmission system of the embodiment of the invention
It is intended to.
Specific embodiment
The data transmission method and the specific embodiment of Transmission system for providing the present invention below in conjunction with the accompanying drawings do in detail
Explanation.
In the prior art, in the OFDM baseband system based on FEC mechanism, data processing end is list with the communication of user terminal
To communication, that is to say, that data processing end can send data to user terminal, and user terminal can not send data to data processing end,
There is error code which results in the data received when user terminal, and when can not voluntarily correct, number is received determined by user terminal
According to accuracy rate it is relatively low, very big influence so is caused to follow-up treatment work.The embodiment of the invention provides a kind of application
In the data transmission method and Transmission system of OFDM baseband system, the problem of prior art presence can be efficiently solved, improve and use
The accuracy rate of data is received determined by the end of family.
Due to only one of which communication channel in OFDM baseband system, so in order to realize method provided by the present invention, needing
Simplex is changed into half-duplex operation, that is to say, that be divided into up channel and down channel；At up channel moment, data
Treatment end sends data to user terminal, and at the down channel moment, user terminal sends data to data processing end.Due to will be original
Simplex is changed to the mode of half-duplex operation, and slot portion needs to modify accordingly.For example：In original simplex
Transmission means in, structure of time slot be a superframe (166.67ms), including 32 frames (per frame be 5.08ms) and one protect
Shield frame (0.94ms)；Simplex is changed to half-duplex operation now, corresponding structure of time slot is changed to a superframe
(8.005ms), including a short frame (0.785ms, belongs to the down channel moment, at this moment, mainly user terminal to
Data processing end send data) and a frame long (7.22ms, belongs to up channel, at this moment, mainly data processing end
Data are sent to user terminal).
Specific embodiment of the invention provides a kind of data transmission method for being applied to OFDM baseband system：Receive data
The primary data that treatment end sends, is demodulated to the primary data, obtains the first demodulating data；First demodulating data is entered
Row decoding, obtains the first alternate data；When the first alternate data has error code, can judgement voluntarily be corrected, if it can, to
After one alternate data is voluntarily corrected, result as reception data will be corrected；Otherwise, repeat requests are sent to data processing end, and
The re-transmission data corresponding with repeat requests that data processing end sends are demodulated, the second demodulating data is obtained；By second
Demodulating data is merged with the first demodulating data, to the data decoding after merging, is obtained according to decoded result and is received data；Its
In, the data segment for retransmitting data and primary data puts in order difference.
In the technical scheme that the specific embodiment of the invention is provided, the number transmitted in the case of bad channel has been taken into full account
According to each data segment suffered by influence it is different and uplink and downlink timeslot differs the most probably constant feelings of very short, channel conditions
Condition, when user terminal detects the first alternate data in the presence of the error code that can not voluntarily correct, then may require that data processing end is carried out
Retransmit；Data processing end then the order of each data segment of primary data is changed after as re-transmission data；At the up channel moment,
Data processing end will retransmit data is activation to user terminal, and user terminal will then retransmit data and be demodulated, and be closed with the first demodulating data
And, then decode, determined to receive data according to decoded result, can so effectively improve the standard that data are received determined by user terminal
True rate.
In order that those skilled in the art more fully understand the technical scheme in the application, below in conjunction with the application reality
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, this area is common
The every other embodiment that technical staff is obtained, should all belong to the scope of the application protection.
Fig. 1 is refer to, is the flow chart of the data transmission method of the embodiment of the invention.
As shown in figure 1, the data transmission method is comprised the following steps：
S101：User terminal receives the primary data that data processing end sends, and primary data is demodulated, and obtains the first solution
Adjusting data.
Data processing end involved by the embodiment of the present invention is the equipment with data sampling and processing, sending function, this skill
Art field personnel be referred to as " terminal "；User terminal can receive data as transmission data is activation to baseband system using identified
Other equipment carry out follow-up treatment, be referred to as user terminal " base station " by those skilled in the art.
In data transmission procedure, the data of collection are encoded, modulated by data processing end, at the up channel moment,
The primary data that will be modulated is by transmission to user terminal.User terminal receives data processing end and is sent at the up channel moment
Primary data, and primary data is demodulated, using demodulation result as the first demodulating data.
Wherein, the data after the coding at data processing end can be divided into some data segments, and, it is necessary to each when being modulated
Pilot frequency information is inserted between data segment.That is, the primary data transmitted by data processing end includes data message and pilot tone
Information.When user terminal is demodulated to primary data, it is necessary to pilot frequency information is removed, using remaining data message as first
Demodulating data.In OFDM baseband system, data processing end can certainly be about to pilot frequency information and be inserted into data message, user terminal
Pilot frequency information removal can be certainly about to, because this is known in those skilled in the art, so not describing in detail.
It is understood that due to there is certain interference on channel, so the primary data that receives of user terminal and number
The primary data sent according to treatment end is different, there is error.
S102：User terminal is decoded the first demodulating data, obtains the first alternate data.
The treatment that user terminal is decoded demodulation result, and using decoded result as the first alternate data, carry out
Follow-up judgement.
S103：When the first alternate data has error code, can judgement voluntarily be corrected, if it can, into step S104；It is no
Then, into step S105.
In OFDM baseband system, user terminal is capable of detecting when the first alternate data as decoded result with the presence or absence of mistake
Code, if there is no error code, shows that the first alternate data accuracy rate is higher, and user terminal is then directly using the first alternate data as connecing
Data are received, to carry out follow-up treatment；If there is error code, can user terminal can be judged voluntarily entangle by certain mode
Just, if can voluntarily correct, user terminal then performs step S104, and the first alternate data is corrected；Otherwise, into step
S105。
It should be noted that in existing OFDM baseband system, user terminal is adopted when being decoded to the data after demodulation
The cascade form decoded with Viterbi decoding and RS (Reed-Solomon, Read-Solomon).Can using the decoded results of RS
To judge with the presence or absence of error code, and whether can carry out voluntarily error correction.There is the special information can be with corresponding program
Display " whether there is error code ", " with the presence or absence of can not voluntarily error correction data " and " whether the data are transmission for the first time " etc.
Information.
S104：User terminal is voluntarily corrected to the first alternate data, will correct result as reception data.
In OFDM baseband system, when user terminal judges that the first alternate data that there is error code can be corrected voluntarily,
Then can voluntarily correct the first alternate data, and using correction after the first alternate data as data are received, carry out follow-up treatment
Work.
It should be noted that in existing OFDM baseband system, for the first alternate data that how there will be error code
Voluntarily corrected, this is known in those skilled in the art, is not described in the present embodiment.
S105：User terminal sends repeat requests to data processing end, and to the transmission of data processing end and repeat requests phase
Corresponding re-transmission data are demodulated, and obtain the second demodulating data.
When user terminal judges that the first alternate data that there is error code can not be corrected voluntarily, show the first alternate data
Beyond the error correcting capability of user terminal itself, now, user terminal sends to retransmit to data processing end and asks then at the down channel moment
Ask, it is desirable to which retransfer primary data.
If the repeat requests that data processing end sends in down channel reception to user terminal, each by primary data
The putting in order of data segment is modulated after being changed, and as retransmitting data, and is sent to user at next up channel moment
End；User terminal can will then retransmit data and be demodulated, and pilot frequency information is removed, and obtain the second demodulating data, carry out follow-up place
Reason.
If the repeat requests that data processing end does not send in down channel reception to user terminal, on next
At the row channel moment, next data for modulating are sent to user terminal as primary data.
Wherein, the reason for being changed that put in order of each data segment of primary data is by data processing end：(1) general letter
Disturb (for example in road：Noise) influence to transmitting each several part of data is likely to different, that is to say, that each number of primary data
According to section by being influenceed possible difference；(2) up, descending time slot interval is very short, and being typically approximately considered channel will not change.
So considering above-mentioned (1), (2), data processing end adjusts the order of each data segment to increase what user terminal was received
The accuracy rate of primary data.
Wherein, user terminal is demodulated to the re-transmission data corresponding with repeat requests that data processing end sends, specifically
For：The putting in order for data segment of the re-transmission data corresponding with repeat requests that user terminal sends data processing end is reduced to
The data segment of primary data puts in order；The re-transmission data that user terminal will adjust after data segment order are demodulated.
It will be appreciated by persons skilled in the art that in OFDM baseband system, data processing end sends just to user terminal
Before beginning data, frame head data can be in advance sent, its effect is in order to can correctly be captured when making user terminal synchronous, to know
Primary data behind road since when.Frame head data is one group of special data, and correlation computations are carried out to it
It can be found that have corresponding correlation peak (numerical value king-sized place be referred to as relevant peaks), and its in the channel anti-interference
It is very capable.So repeat requests can select frame head data.As long as data processing end captures frame head at the down channel moment
Data, just explanation needs to retransmit primary data, otherwise, when next up channel moment, sends next initial data.
S106：User terminal merges the second demodulating data with the first demodulating data, to the data decoding after merging, root
Obtained according to decoded result and receive data.
User terminal decodes the second demodulating data with transmitting first after the first demodulating data for obtaining merges treatment.This
Treatment can be merged to the second demodulating data and the first demodulating data by the way of equal gain combining in inventive embodiments,
Specifically merging mode is：First demodulating data and the corresponding data segment of the second demodulating data are added.Certainly, ability
Field technique personnel are it is understood that merging mode is not limited to use equal gain combining, as long as can utilize what is transmitted twice
Data, are thought of the invention.
Because the accuracy rate for transmitting the decoded result after data merge twice is greatly improved, then user terminal will
The decoded result of merging data is also rational directly as data are received.
More further, it is specific real in the present invention one in order that the reception data of user terminal have accuracy rate higher
Apply in mode, the user terminal is decoded to the data after merging, obtained according to decoded result and receive data, specially：To merge
Data afterwards are decoded, and obtain the second alternate data；When the second alternate data has error code, can judgement voluntarily be corrected,
If it can, after then the second alternate data is voluntarily corrected, result as reception data will be corrected；Otherwise, by the second alternate data
As reception data.
It is understood that when user terminal detects that the second alternate data does not exist error code, directly by the second alternative number
Follow-up treatment is carried out according to as reception data.
In the technical program, when user terminal detects the first alternate data in the presence of the error code that can not voluntarily correct, then can
It is required that data processing end is retransmitted；Data processing end then the order of each data segment of primary data is changed after as re-transmission number
According to；At the up channel moment, data processing end will retransmit data is activation to user terminal, and user terminal will then retransmit data and be solved
Adjust, merge with the first demodulating data, then decode, determined to receive data according to decoded result, can so effectively improve user terminal
The identified accuracy rate for receiving data.
It should be noted that the scheme that the specific embodiment of the invention is provided can be applied to view data transmission in, phase
The various data answered are view data；Data processing end and user terminal are then the equipment that can be processed image.Certainly, originally
Art personnel are it is understood that the scheme that the specific embodiment of the invention is provided is not limited to view data transmission
In, can also be applied in other data transfers.All it is the present invention for the data transmission method using core concept of the present invention
The scope protected.
Data transmission method provided by the present invention is illustrated with reference to an example.
Assuming that data processing end needs to send data to user terminal, the data encoded after be AB (after A presentation codes
The front half section of data, the second half section of the data after B presentation codes)；AB is modulated, after insertion pilot frequency information a and b, data
It is changed into aAbB, aAbB as primary data is sent to user terminal at the up channel moment by channel.Done due to there is channel
Disturb, the primary data that user terminal is received has certain error, be changed into a ' A ' b ' B '.If the noise in channel is to transmission data
The influence of each several part is：Influence to a is (1/3) a, is (1/3) A on A influences, and the influence to b is (1/7) b, the influence to B
It is (1/7) B.So a '=a+ (1/3) a, A '=A+ (1/3) A, b '=b+ (1/7) b, B '=B+ (1/7) B.Assuming that OFDM base band
In system, user terminal could be corrected voluntarily when can only changing data message no more than 1/4, then user terminal is to a ' A ' b '
The processing procedure of B ', as shown in Figure 2：
S201：Primary data a ' A ' b ' B ' the demodulation that user terminal will be received, obtains the first demodulating data A ' B '.
S202：User terminal is decoded the first demodulating data A ' B ', obtains the first alternate data.
S203：User terminal detects the mistake that the first alternate data presence can not be corrected, and is sent to data processing end and retransmitted
Request.
In this example, because user terminal is only voluntarily corrected to the data that data message changes no more than 1/4,
That is, user terminal can only correct B ', it is impossible to correct A '.So at the down channel moment, user terminal need to be sent out to data processing end
Repeat requests are sent, the repeat requests can be the frame head data that data processing end sent before primary data is sent.
The order of data AB is adjusted after the repeat requests that down channel reception to user terminal sends at data processing end
It is whole so that data waiting for transmission are changed into BA；BA is modulated, after insertion pilot frequency information ab, data waiting for transmission are aBbA, will
ABbA is sent to user terminal as data are retransmitted in down channel delivery time.Due to channel disturbance, the re-transmission that user terminal is received
Data are a " B " b " A ".
S204：After the re-transmission data a that user terminal will be received " B " b " A " are reduced to the order of each data segment of initial data
It is demodulated, obtains the second demodulating data A " B ".
Because up, descending time slot interval is shorter, channel conditions do not change, now A "=A+ (1/7) A, B "=B+
(1/3)B。
S205：After first demodulating data and the second demodulating data are carried out equal gain combining by user terminal, decoded, obtained
Second alternate data.
Specifically merging process is：User terminal carries out the first demodulating data and the corresponding data segment of the second demodulating data
It is added, i.e.,：A '+A "=2A+ (10/21) A, B '+B "=2B+ (10/21) B.It can be seen that by primary data after equal gain combining
The middle noise of front half section and second half section only accounts for the 10/42 of primary data, less than 1/4.
S206：User terminal is voluntarily corrected to the second alternate data, will correct result as reception data.
Because the noise in the data after merging only accounts for the 10/42 of primary data, less than 1/4, so user terminal can be with
Directly voluntarily corrected, using the result after correction as data are received, to carry out follow-up treatment work.
Specific embodiment of the invention also provides a kind of data transmission system for being applied to OFDM baseband system, such as Fig. 3
Shown, the system includes：
Receiving unit 310, the first demodulating unit 320, the first alternate data obtaining unit 330, first receive data and obtain
Unit 340, retransmission unit 350, the second demodulating unit 360, combining unit 370, second receive data acquiring unit 380.
Receiving unit 310, is connected with data processing end 300, for receive data processing end 300 transmission primary data and
Retransmit data.
First demodulating unit 320, for the primary data that receiving unit 310 is received to be demodulated, obtains the first solution
Adjusting data.
First alternate data obtaining unit 330, for the first demodulating data that the first demodulating unit 320 is obtained to be solved
Code, obtains the first alternate data.
First receives data acquiring unit 340, for when there is error code in the first alternate data, to the first alternate data from
After row is corrected, result as reception data will be corrected；If cannot voluntarily change just, triggering retransmission unit 350 to data at
Reason end 300 sends repeat requests.
Second demodulating unit 360, the re-transmission data that the data processing end 300 for receiving unit 310 to be received sends
It is demodulated, obtains the second demodulating data.
Combining unit 370, for the second demodulating data to be merged with the first demodulating data.
Second receives data acquiring unit 380, for the data decoding after merging, being obtained according to decoded result and receiving number
According to.
Wherein, the data segment for retransmitting data and primary data puts in order difference.
Wherein, as shown in figure 4, the second demodulating unit 360 is specifically included：Order adjustment subelement 361, it is single for that will receive
The data segment of re-transmission data that unit 310 receives puts in order and is reduced to the data segment of primary data and puts in order；Second demodulation
Subelement 362, is demodulated, as the second demodulating data for will adjust the re-transmission data after data segment order.
Wherein, the concrete configuration of combining unit 370 is：
For the first demodulating data and the corresponding data segment of the second demodulating data to be added.
Wherein, as shown in figure 5, the second reception data acquiring unit 380 is specifically included：Second alternate data obtains subelement
381, for the data after merging to be decoded, obtain the second alternate data；Second receives data obtains subelement 382, uses
In when the second alternate data has error code, after voluntarily being corrected to the second alternate data, result as reception data will be corrected；Such as
Fruit cannot voluntarily correct, then using the second alternate data as reception data.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, and these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of data transmission method, it is characterised in that including：
The primary data that data processing end sends is received, the primary data is demodulated, obtain the first demodulating data；
First demodulating data is decoded, the first alternate data is obtained；
When the first alternate data has error code, can judgement voluntarily be corrected, if it can, voluntarily being corrected to the first alternate data
Afterwards, result as reception data will be corrected；Otherwise,
Repeat requests are sent to data processing end, and the re-transmission data corresponding with repeat requests that data processing end sends are entered
Row demodulation, obtains the second demodulating data；
Second demodulating data is merged with the first demodulating data, to the data decoding after merging, is obtained according to decoded result
Receive data.
2. data transmission method according to claim 1, it is characterised in that the data of the re-transmission data and primary data
Section puts in order difference.
3. data transmission method according to claim 1, it is characterised in that sent to the data processing end and re-transmission
The method that the corresponding re-transmission data of request are demodulated includes：The weight corresponding with repeat requests that data processing end is sent
The data segment for passing data puts in order and is reduced to the data segment of primary data and puts in order；The re-transmission exchanged after entire data section order
Data are demodulated.
4. data transmission method according to claim 1, it is characterised in that described to demodulate the second demodulating data and first
The method that data are merged includes：First demodulating data and the corresponding data segment of the second demodulating data are added.
5. data transmission method according to claim 1, it is characterised in that described pair merge after data decoding, according to
The method that decoded result obtains reception data includes：Data after merging are decoded, the second alternate data is obtained；When second
When alternate data has error code, can judgement voluntarily be corrected, if it can, after then the second alternate data is voluntarily corrected, will correct
Result is used as reception data；Otherwise, using the second alternate data as reception data.
6. a kind of data transmission system, it is characterised in that including：
Receiving unit, the first demodulating unit, the first alternate data obtaining unit, first receive data acquiring unit, retransmission unit,
Second demodulating unit, combining unit, second receive data acquiring unit；
Receiving unit, for receiving the primary data of data processing end transmission and retransmitting data；
First demodulating unit, the primary data for receiving unit to be received is demodulated, and obtains the first demodulating data；
First alternate data obtaining unit, for the first demodulating data that the first demodulating unit is obtained to be decoded, obtains
One alternate data；
First receives data acquiring unit, for when the first alternate data has error code, voluntarily being corrected to the first alternate data
Afterwards, result as reception data will be corrected；If cannot voluntarily change just, triggering retransmission unit sends weight to data processing end
Pass request；
Second demodulating unit, the re-transmission data for receiving unit to be received are demodulated, and obtain the second demodulating data；
Combining unit, for the second demodulating data to be merged with the first demodulating data；
Second receives data acquiring unit, for the data decoding after merging, being obtained according to decoded result and receiving data.
7. data transmission system according to claim 6, it is characterised in that the data of the re-transmission data and primary data
Section puts in order difference.
8. data transmission system according to claim 6, it is characterised in that second demodulating unit, specifically includes：It is suitable
Sequence adjusts subelement, and the data segment of the re-transmission data for receiving unit to be received puts in order and is reduced to the number of primary data
Put in order according to section；Second demodulation subelement, is demodulated, as second for will adjust the re-transmission data after data segment order
Demodulating data.
9. data transmission system according to claim 6, it is characterised in that the combining unit concrete configuration is：For
First demodulating data and the corresponding data segment of the second demodulating data are added.
10. data transmission system according to claim 6, it is characterised in that described second receives data acquiring unit, tool
Body includes：Second alternate data obtains subelement, for the data after merging to be decoded, obtains the second alternate data；The
Two receive data obtains subelements, for when the second alternate data has error code, after voluntarily being corrected to the second alternate data, inciting somebody to action
Result is corrected as reception data；If cannot voluntarily correct, using the second alternate data as reception data.
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| CN201611099513.8A CN106788883A (en) | 2016-12-02 | 2016-12-02 | Data transmission method and transmission system |
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| CN106034012A (en) * | 2015-03-12 | 2016-10-19 | 株式会社Ntt都科摩 | Data retransmitting method and apparatus |
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| CN101119178A (en) * | 2006-08-01 | 2008-02-06 | 华为技术有限公司 | Signal transmitting, receiving method and signal transmitting device |
| CN101897141A (en) * | 2007-12-13 | 2010-11-24 | 高通股份有限公司 | Forward and reverse shifting selective HARQ combining scheme for OFDMA systems |
| CN102647383A (en) * | 2011-02-18 | 2012-08-22 | 无锡物联网产业研究院 | Data transmission method and data transmission system applied to OFDM (Orthogonal Frequency Division Multiplexing) baseband system |
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