CN104079372A - Method, system, sending end, relay and receiving end of transmitting data - Google Patents

Abstract

A method for transmitting data, the method comprising: a sending end encodes two sets of data respectively, and sends two sets of encoded data to a relay; the relay receives the two sets of encoded data, and then translates them respectively Code processing, in which, one group of data records an error in line A, and another set of data has an error in line B; if both A and B are less than the preset network coding selection threshold, the error data will be restored, and then the data will be encoded and network coded respectively. Finally, send the data after network coding to the receiving end; the receiving end decodes the data sent by the relay respectively to obtain the original data; if A and B are not both smaller than the preset network coding selection threshold, then directly forward the two groups data. After applying the embodiment of the present invention, when the relay does not receive all the data correctly, the reliability and quality of data transmission are improved.

Description

A data transmission method, system, sending end, relay and receiving end

technical field

The present application relates to the technical field of communication, and more specifically, to a data transmission method, system, sending end, relay and receiving end.

Background technique

In the evolved LTE-Advanced system of the 3GPP Long-term Evolution standard (LTE) and the IMT-Advanced system of the International Mobile Telecommunications (IMT), in order to improve the information transmission environment, improve the signal transmission quality between the information sending device and the information receiving device, To reduce the packet loss rate and ensure the reliability of information transmission, relay technology is introduced. That is, a relay device is introduced between the information sending device and the information receiving device, and the data information sent by the information sending device is relayed to form a relay system.

In the process of wireless transmission, a node will also receive interference from other nodes while receiving useful signals. Usually, these interferences will have a negative impact on the transmission process and reduce the throughput of the entire network. The general communication system improves the communication quality through the design of the receiving end or the scheduling of the sending end. The core idea of this method is how to reduce and avoid interference.

Network coding provides a new processing method, which considers interference as a useful signal to use instead of avoiding, and improves the throughput performance of the system by using interference, so as to obtain a more efficient communication system. Network coding is realized by forwarding information through relay nodes. Compared with traditional relay, using network coding can further improve the throughput and efficiency of the system.

Refer to Figure 1 for a schematic diagram of two user downlinks using network coding technology. In the first time slot, the base station (eNB) sends the signal S1 of the user UE1; in the second time slot, the eNB sends the signal S2 of the user UE2; Signal. The network coding process is realized at the physical layer, and information is merged and extracted through methods such as signal modulation and demodulation and receiver processing.

In the prior art, the application of network coding is limited to the premise that the relay receives all data correctly, that is, the above network coding needs to ensure that the data received by the relay in the first time slot and the second time slot can be correctly received. However, when the relay does not receive all the data correctly, the reliability and quality of data transmission are reduced due to the inability to perform network coding.

Contents of the invention

The embodiment of the present invention proposes a data transmission method, which improves the reliability and quality of data transmission when the relay does not receive all the data correctly.

The embodiment of the present invention also proposes a data transmission system, which improves the reliability and quality of data transmission when the relay does not receive all the data correctly.

The embodiment of the invention also proposes a sending end for transmitting data, which improves the reliability and quality of data transmission when all the data is not received correctly.

The embodiment of the invention also proposes a data transmission relay, which can improve the reliability and transmission quality of data transmission when all the data is not received correctly.

The embodiment of the invention also proposes a receiving end for transmitting data, which improves the reliability and quality of data transmission when all data is not received correctly.

The technical scheme of the embodiment of the present invention is as follows:

A method of transmitting data, the method comprising:

The sending end encodes the two sets of data separately, and sends the two sets of encoded data to the relay;

The relay receives the two sets of coded data, and then performs decoding processing respectively, wherein a line A error occurs in one set of data, and a line B error occurs in the other set of data;

If both A and B are smaller than the preset network coding selection threshold, restore the error data, and then send the network coded data to the receiving end after encoding processing and network coding respectively; the receiving end respectively interprets the data sent by the relay Code processing to obtain the original data; if A and B are not both smaller than the preset network coding selection threshold, then directly forward two sets of data.

The two sets of data include two data packets of the same user, or data of two users.

The coding process includes data block, erasure correction coding, cyclic check CRC coding and parallel/serial conversion.

The data block includes: dividing the data into K blocks, arranging the K data blocks in parallel to obtain the data block, and K is the information bit length of the erasure code;

The erasure correction coding includes: respectively performing erasure correction coding on the data blocks in units of columns, and longitudinally appending the generated parity bit after the column of data to obtain the data after erasure correction coding;

The CRC encoding includes: performing CRC error detection encoding on the data after the erasure correction encoding in line units, and appending the generated CRC check bit after the row of data to obtain the data after the CRC encoding;

The parallel/serial conversion includes: converting the CRC-encoded data from parallel data to serial data.

The decoding process includes: serial/parallel conversion and CRC error detection.

The serial/parallel conversion includes: converting the serial data into parallel data in units of the length of the CRC coded block to obtain the received block;

The CRC error detection includes: performing CRC error detection and decoding on the received blocks according to the CRC check bits in line units, and removing the CRC check bits to obtain data after CRC error detection.

The restoration of the error data includes: correcting and erasing the data after the CRC error detection in units of columns according to the check digits, and removing the check digits to obtain the original data.

A system for transmitting data, the system includes a sending end, a relay and a receiving end,

The sending end is used to encode the two sets of data separately, and send the two sets of encoded data to the relay;

The relay is used to receive the two sets of coded data, and then perform decoding processing respectively, wherein an error occurs in line A in one set of data, and an error in line B occurs in the other set of data; if both A and B are less than the preset network coding selection threshold, restore the wrong data, and then send the network coded data to the receiving end after coding processing and network coding respectively; if A and B are not both smaller than the preset network coding selection threshold, the two group data;

The receiving end is used to respectively decode and process the data sent by the relay to obtain the original data.

The sending end includes a sending end serial/parallel conversion unit, a sending end erasure correction coding unit, a sending end error detection coding unit and a sending end parallel/serial conversion unit,

The serial/parallel conversion unit at the sending end is used to divide the data into K blocks, arrange the K data blocks in parallel to obtain data blocks, and K is the information bit length of the erasure correction code;

The erasure correction coding unit at the sending end is used to perform erasure correction coding on the data blocks in units of columns, and longitudinally append the generated parity digits to the data of the column to obtain the data after erasure correction coding;

The error detection encoding unit at the sending end is used to perform CRC error detection encoding on the data after the erasure correction encoding in units of rows, and append the generated CRC check bit to the row of data to obtain the CRC encoded data;

The parallel/serial conversion unit at the sending end is used to convert the CRC-encoded data from parallel data to serial data.

The relay includes a relay serial/parallel conversion unit, a relay error detection decoding unit, a relay erasure correction decoding unit, a relay erasure correction coding unit, a relay error detection coding unit and a relay parallel/serial conversion unit ;

A relay serial/parallel conversion unit is used to convert the serial data into parallel data in units of the length of the CRC coded block to obtain the received block;

The relay error detection and decoding unit is used to perform CRC error detection and decoding on the received block according to the CRC check bit in units of rows, and remove the CRC check bit to obtain the data after CRC error detection; record the number of errors in the data ;

The relay erasure correction and decoding unit is used to perform erasure correction and decoding on the data after the CRC error detection in units of columns and according to the parity bit, to obtain the corresponding data blocks of the original data;

The relay erasure coding unit is used to perform erasure coding on the data blocks in units of columns, and longitudinally append the generated parity digits to the column data to obtain data after erasure coding;

The relay error detection coding unit is used to perform CRC error detection coding on the data after the erasure correction coding in line units, and append the generated CRC check bit to the data of the line to obtain the data after CRC coding;

The relay parallel/serial conversion unit is used to convert the CRC-encoded data from parallel data to serial data.

The receiving end includes: a receiving end serial/parallel conversion unit, a receiving end error detection decoding unit and a receiving end parallel/serial conversion unit;

The serial/parallel conversion unit at the receiving end is used to convert the serial data into parallel data in units of the length of the CRC coded block to obtain the received block;

The error detection and decoding unit at the receiving end is used to perform CRC error detection and decoding on the received blocks in line units according to the CRC check bits, and remove the CRC check bits to obtain the data after CRC error detection;

The relay parallel/serial conversion unit is used to convert the data after CRC error detection from parallel data to serial data.

A sending end for transmitting data, the sending end is used to encode two sets of data respectively, and send the two sets of encoded data to a relay.

The sending end includes a sending end serial/parallel conversion unit, a sending end erasure correction coding unit, a sending end error detection coding unit and a sending end parallel/serial conversion unit,

The serial/parallel conversion unit at the sending end is used to divide the data into K blocks, arrange the K data blocks in parallel to obtain data blocks, and K is the information bit length of the erasure correction code;

The erasure correction coding unit at the sending end is used to perform erasure correction coding on the data blocks in units of columns, and longitudinally append the generated parity digits to the data of the column to obtain the data after erasure correction coding;

The error detection encoding unit at the sending end is used to perform CRC error detection encoding on the data after the erasure correction encoding in units of rows, and append the generated CRC check bit to the row of data to obtain the CRC encoded data;

The parallel/serial conversion unit at the sending end is used to convert the CRC-encoded data from parallel data to serial data.

A relay for transmitting data, the relay is used to receive two sets of coded data, and then perform decoding processing respectively, wherein a line A error occurs in one set of data, and a line B error occurs in another set of data; If both A and B are smaller than the preset network coding selection threshold, restore the error data, and then send the network coded data to the receiving end after coding processing and network coding respectively; if A and B are not both smaller than the preset network coding threshold If the encoding selects the threshold, two sets of data are directly forwarded.

The relay includes a relay serial/parallel conversion unit, a relay error detection decoding unit, a relay erasure correction decoding unit, a relay erasure correction coding unit, a relay error detection coding unit and a relay parallel/serial conversion unit ;

A relay serial/parallel conversion unit is used to convert the serial data into parallel data in units of the length of the CRC coded block to obtain the received block;

The relay error detection and decoding unit is used to perform CRC error detection and decoding on the received blocks according to the CRC check bits in units of rows, and remove the CRC check bits to obtain the data after CRC error detection; relay correction and erasure decoding The unit is used to correct and delete the data after the CRC error detection in units of columns according to the parity bits, and obtain the data blocks corresponding to the original data;

The relay erasure coding unit is used to perform erasure coding on the data blocks in units of columns, and longitudinally append the generated parity digits to the column data to obtain data after erasure coding;

The relay error detection coding unit is used to perform CRC error detection coding on the data after the erasure correction coding in line units, and append the generated CRC check bit to the data of the line to obtain the data after CRC coding;

The relay parallel/serial conversion unit is used to convert the CRC-encoded data from parallel data to serial data.

A receiving end for transmitting data, the receiving end is used to respectively decode and process the data sent by the relay to obtain the original data.

The receiving end includes: a receiving end serial/parallel conversion unit, a receiving end error detection decoding unit and a receiving end parallel/serial conversion unit;

The serial/parallel conversion unit at the receiving end is used to convert the serial data into parallel data in units of the length of the CRC coded block to obtain the received block;

The error detection and decoding unit at the receiving end is used to perform CRC error detection and decoding on the received blocks in line units according to the CRC check bits, and remove the CRC check bits to obtain the data after CRC error detection;

The relay parallel/serial conversion unit is used to convert the data after CRC error detection from parallel data to serial data.

It can be seen from the above technical solutions that in the embodiment of the present invention, the sending end encodes two sets of data respectively, and sends two sets of encoded data to the relay; the relay receives the two sets of encoded data, and then separately Carry out decoding processing, wherein, one group of data records an error in row A, and another group of data has an error in row B; if A and B are both smaller than the preset network coding selection threshold, the error data is restored, and then the coding and processing are performed respectively. After network encoding, send the network-encoded data to the receiving end; the receiving end decodes the data sent by the relay respectively to obtain the original data; if A and B are not both smaller than the preset network encoding selection threshold, they will be forwarded directly two sets of data. It is determined to adopt different transmission modes according to specific error conditions of the two sets of data. Since the relay can restore data that has errors in the transmission process during the decoding process, the reliability and transmission quality of data transmission can be improved.

Description of drawings

FIG. 1 is a schematic diagram of two user downlinks using network coding technology;

Fig. 2 is a schematic structural diagram of a system for transmitting data;

FIG. 3 is a schematic structural diagram of a sending end for transmitting data;

FIG. 4 is a schematic diagram of a relay structure for transmitting data;

FIG. 5 is a schematic structural diagram of a sending end for transmitting data;

Fig. 6 is a schematic flow chart of a method for transmitting data;

FIG. 7 is a schematic diagram of an encoding process flow;

FIG. 8 is a schematic diagram of a decoding processing flow.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the embodiment of the present invention, encoding processing is added at the sending end, and decoding processing is added at the relay, and which method to use to send data to the sending end is determined through the network coding threshold. In the decoding process, the data that has errors in the transmission process can be restored. Therefore, by adopting the technical solution of the present invention, when the relay does not receive all the data correctly, the application opportunities of network coding can be increased, thereby improving the reliability and quality of data transmission.

Referring to FIG. 2 , it is a schematic structural diagram of a data transmission system, which includes a sending end 101 , a relay 102 and a receiving end 103 .

The sending end 101 is used to encode the two sets of data respectively, and send the two sets of encoded data to the relay;

The relay 102 is used to receive the two sets of encoded data, and then perform decoding processing respectively, wherein an error occurs in line A in one set of data, and an error in line B occurs in another set of data;

If both A and B are smaller than the preset network coding selection threshold, restore the error data, and then send the network coded data to the receiving end after coding processing and network coding respectively; if A and B are not both smaller than the preset network coding threshold If the encoding selects the threshold, two sets of data are directly forwarded. The network coding selection threshold is the number of check bits of the erasure code.

The receiving end 103 is configured to respectively decode the data sent by the relay to obtain the original data.

The sending end 101 in the present invention is different from the sending end in the prior art in that it needs to encode the data, and its purpose is: under certain conditions, the relay 102 can recover wrong data through decoding processing. The relay 102 sends the decoded data to the receiving end 103 through encoding processing and network encoding. Correspondingly, the received data is decoded at the receiving end 103 to obtain the original data. Through the above process from the sending end 101 to the relay 102 and from the relay 102 to the receiving end 103, the reliability and correctness of the data received by the receiving end 103 are guaranteed.

Accompanying drawing 3 is the structural diagram of sending end 101, and sending end 101 comprises sending end serial/parallel conversion unit 1011, sending end erasure correction coding unit 1012, sending end error detection coding unit 1013 and sending end parallel/serial conversion unit 1014.

The serial/parallel conversion unit 101 at the sending end is used to divide the data into K blocks, arrange the K data blocks in parallel to obtain data blocks, and K is the information bit length of the erasure correction code.

Erasure correction codes are linear block codes with correction and erasure functions, including Reed-Solomon codes, BCH codes, etc. The information bit length of the erasure correction code is the number of erasures that can be corrected. The information bit length K of the erasure correction code is the input data length of the linear block code used, which is determined by the specific configuration of the erasure correction coding parameters of the system.

The erasure-correction coding unit 102 at the sending end is configured to perform erasure-correction coding on the data blocks in units of columns, and longitudinally append the generated parity bits after the column of data to obtain erasure-correction-coded data.

The error detection encoding unit 103 at the sending end is used to perform CRC error detection encoding on the data after erasure correction encoding in units of rows, and append the generated CRC check bits to the row of data to obtain the CRC encoded data.

The parallel/serial conversion unit at the sending end is used to convert the CRC-encoded data from parallel data to serial data.

Accompanying drawing 4 is the structural diagram of relay 102, and relay 102 comprises relay serial/parallel conversion unit 1021, relay error detection decoding unit 1022, relay erasure correction decoding unit 1023, relay erasure correction encoding unit 1024, An error detection coding unit 1025 and a parallel/serial conversion unit 1026 are relayed.

The relay serial/parallel conversion unit 1021 is configured to convert the serial data into parallel data in units of the length of the CRC encoded block to obtain received blocks.

By performing CRC cyclic redundancy check encoding processing on the data, that is, adding a number of CRC bits at the end of the data to form a CRC encoding block. Whether the decoding of the data is correct can be judged through the verification process of the CRC decoder. The code block length of the CRC is determined by the system configuration, generally determined by the data length plus 8, 16 or 24 CRC check bits.

The relay error detection and decoding unit 1022 is used to perform CRC error detection and decoding on the received blocks in line units according to the CRC check bits, and remove the CRC check bits to obtain data after CRC error detection; record data errors number.

The network coding selection threshold is the number of check bits N-K of the erasure code, where N is the length of the erasure code block, and K is the information bit length of the erasure code, that is, the length of the input data block of the erasure code. N is determined by system configuration.

After the two sets of data are checked by CRC, for example, one set of data has A line error, and the other set of data has B line error, A and B are respectively compared with the number of check digits N-K of the erasure correction code, if both A and B are less than If the threshold is selected, it indicates that although some received blocks have been deleted, the two sets of data can be correctly restored by using the erasure correction coding and decoding technology, and then the network coding process is performed.

The relay erasure correction and decoding unit 1023 is used to perform erasure correction and decoding on the data after the CRC error detection in units of columns according to the parity bits, so as to obtain data blocks corresponding to the original data.

The relay erasure coding unit 1024 is configured to perform erasure coding on the data blocks in units of columns, and longitudinally append the generated parity bits to the column data to obtain data after erasure coding.

The relay error detection coding unit 1025 is configured to perform CRC error detection coding on the data after the erasure correction coding in row units, and append the generated CRC check bits to the row of data to obtain the CRC coded data.

The relay parallel/serial conversion unit 1026 is configured to convert the CRC-encoded data from parallel data to serial data.

FIG. 5 is a schematic diagram of the structure of the receiving end 103. The receiving end 103 includes: a receiving end serial/parallel conversion unit 1031, a receiving end error detection decoding unit 1032, and a receiving end parallel/serial conversion unit 1033.

The serial/parallel conversion unit 1031 at the receiving end is configured to convert the serial data into parallel data in units of the length of the CRC encoded block to obtain received blocks.

The error detection and decoding unit 1032 at the receiving end is used to perform CRC error detection and decoding on the received blocks in line units according to the CRC check bits, and remove the CRC check bits to obtain data after CRC error detection;

The relay parallel/serial conversion unit 1033 is used to convert the data after CRC error detection from parallel data to serial data.

The method for transmitting data is described in detail below in conjunction with accompanying drawing 6, specifically comprises the following steps:

601. The sending end encodes the two sets of data respectively, and sends the two sets of encoded data to the relay.

The two sets of data in the present invention refer to: two data packets of the same user, or data of two users. Referring to Figure 7, the encoding process includes the following four steps: data block, erasure correction encoding, cyclic check (CRC) encoding and parallel/serial conversion.

6011: Data chunking

The data is divided into K blocks, and the K data blocks are arranged in parallel to obtain data blocks, and K is the information bit length of the erasure correction code.

It specifically includes: according to the code block information bit length of the erasure correction code, performing block processing on the transmitted data to obtain parallel data blocks. Wherein, the number of parallel data blocks is equal to the information bit length of the erasure correction code. After the data is divided into blocks, the sent data is divided into K data blocks, each data block is L bytes, and the K data blocks are arranged in parallel.

6012: Erasure Coding

Erasure-correction coding is performed on the data blocks in units of columns, and the generated parity bits are longitudinally appended to the data in the column to obtain data after erasure-correction coding.

Specifically, it includes: performing longitudinal erasure coding on the data blocks arranged in parallel, and appending the generated verification blocks under the data blocks in parallel. Erasure coding is performed on each column in the parallel data blocks, and the check bits generated by the erasure coding are appended longitudinally to the data in the column, and all the check bits arranged in columns form data blocks by rows.

For example, erasure correction coding is performed on the data of K bytes in the first column, and the data of N-K bytes formed by encoding is appended to the first column, and the data in the first column in the verification block is arranged vertically to form the first column; for The data operations of other columns are the same, and finally an L×(N-K) parity check matrix will be formed. Then, all the check digits in the parity check matrix are formed into N-K data blocks by row, such as the K+1th block...Nth block in FIG. 7 . N is the length of the erasure correction code block, which is determined according to the system configuration.

6013: CRC encoding

Perform CRC error detection coding on the data after erasure correction coding in units of rows, and append the generated CRC check bits to the row of data to obtain the data after CRC coding.

It specifically includes: performing horizontal CRC error detection coding on each block, and adding CRC check digits. CRC error detection coding is performed on each of all the data blocks formed by the erasure coded data and all the check blocks formed by the parity bits. As shown in Figure 7, for each of the N blocks from the 1st block to the Nth block, CRC error detection coding is performed separately, and the CRC check bit is appended to the back of each block .

6014: parallel/serial conversion

After CRC encoding, the data is converted from parallel data to serial data

Specifically, it includes: first performing parallel/serial conversion, and then performing subsequent channel processing according to the system of the present invention, and outputting to the channel after processing. Specific channel processing may be channel coding, channel modulation, and the like.

602. The relay receives the two sets of encoded data, and then performs decoding processing respectively, wherein an error occurs in line A in one set of data, and an error in line B occurs in the other set of data;

If both A and B are smaller than the preset network coding selection threshold, the error data will be restored, and then after coding and network coding, two sets of network coded data will be sent to the receiving end; the receiving end will send the data to the relay respectively. The data is decoded and processed to obtain the original data;

If both A and B are not smaller than the preset network coding selection threshold, the two sets of data are directly forwarded.

The relay end performs the inverse processing of the two sets of data received by the sending end, that is, decoding processing. The decoding process includes: serial/parallel conversion and CRC error detection.

6021: Serial/parallel conversion

The serial data is converted into parallel data in units of the length of the CRC encoded block, and the received block is obtained.

For each set of data, channel inverse processing, such as channel demodulation, channel decoding, etc., is performed first. The specific operations and specific implementation methods of the operations are well-known technologies in the art, and will not be repeated here.

6022: CRC error detection

Perform CRC error detection and decoding according to the CRC check bits for the received blocks in row units, and remove the CRC check bits to obtain the data after CRC error detection.

Perform horizontal CRC error detection and decoding on each received block to remove the CRC parity bit. For any block that has an error, delete the block and perform a deletion count. For a block with no errors, set the block as correct. Deletion means that when a correct or incorrect judgment is made on the received data, if a certain position in the received data is lower than the correct judgment threshold and cannot be judged to be true or false, it is deemed to be deleted.

The operation of performing CRC error detection on the received block is the same as the existing implementation manner, and will not be repeated here. For blocks found to be erroneous through CRC error detection, they are set to be deleted, and all blocks set to be deleted are counted to obtain the number of deletions.

After the above-mentioned steps 6021 and 6022 complete the processing of the two sets of data, the deletion numbers A and B obtained by the two sets of data are both smaller than the network coding selection threshold. If yes, go to step 6023; otherwise, go to step 6024. The network coding selection threshold is determined according to the verification capability of erasure correction codes.

6023: Erasure correction decoding

After the CRC error detection, the data is corrected, deleted, and decoded according to the check digits in units of columns, and the check digits are removed to obtain the original data.

For the two sets of data, if the deletion numbers of both parties are less than the selection threshold, it indicates that although some received blocks have been deleted, the two sets of sent data can be restored correctly by using the erasure correction coding and decoding technology, and then go to 6023.

Use the same erasure code as that of the sender to perform erasure correction decoding on the undeleted relay reception block to restore the sent data. The specific operation is: performing erasure correction decoding on each column of all undeleted receiving blocks arranged in parallel, and performing parallel/serial conversion on the decoding results as sending data.

For example, for the first column shown in Figure 8, perform correction erasure decoding on n (K<n≤N) bytes of data in the first column, and arrange the decoding results vertically; perform the same correction on all columns Deletion decoding, all the decoding results arranged vertically form a matrix, each row in the matrix is regarded as a data block, and all data blocks are converted to parallel/serial as sending data.

After completing steps 6021-6023, repeat the same coding process (6011-6014) at the sending end, and perform network coding processing on 2 sets of channel coding blocks to generate 1 set of network coded data, and then modulate and send the data.

6024:

For two sets of data, if the number of deletions corresponding to at least one set of data is greater than or equal to the network coding selection threshold, it indicates that the number of deleted received blocks has exceeded the erasure correction capability of the erasure correction codec, and the sent data cannot be restored correctly, then The network coding process is not performed, and the relay forwarding process of the prior art is performed on the two sets of data.

The receiving end performs the inverse processing to that of the sending end, that is, decoding processing (6021-6022). In the case of network coding processing, the receiving devices corresponding to the two sets of data receive the data after network coding, and perform receiving processing based on network coding. For the case where network coding processing is not performed, the receiving devices corresponding to the two sets of data perform receiving processing in the prior art.

The technical solution of the present invention is applied on the basis of physical layers and above layers of LTE, LTE-Advanced, IMT-Advanced and the like. The codec of the erasure correction code that needs to be concatenated is set as an outer encoder and an outer decoder is cascaded to the communication system, and the judgment of the erasure position is realized by an error detection technology, such as CRC error detection coding.

It can be seen from the above specific implementation manners of the present invention that by adding erasure correction coding and coding, the application performance of network coding can be more effectively improved to a certain extent, and the system throughput performance can be improved.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (17)

1. a method of transmitting data, is characterized in that, described method comprises:

Transmitting terminal, to the processing of encoding respectively of two groups of data, sends the data after two group codings to relaying;

Data described in relay reception after two group codings, then carry out respectively decoding processing, wherein, record one group of data and occur the capable mistake of A, there is the capable mistake of B in another group data;

If A and B are all less than default network code and select thresholding, reduce misdata, then distinguish after encoded processing and network code, to receiving terminal, send the data after network code; The receiving terminal data that centering secondary is sent are respectively carried out decoding processing, obtain former data; If A and B are not all less than default network code and select thresholding, directly forward two groups of data.

2. transmit according to claim 1 the method for data, it is characterized in that, described two groups of data comprise two packets of same user, or two users' data.

3. transmit according to claim 1 the method for data, it is characterized in that, described coding processing comprises deblocking, entangles and delete coding, cyclic check CRC coding and parallel/serial conversion.

4. transmit according to claim 3 the method for data, it is characterized in that, described deblocking comprises: data are divided into K piece, by K data block parallel arranged, obtain deblocking, K entangles the information bit length deleting code;

Described entangling deleted coding and comprised: deblocking is entangled respectively and deletes coding with the unit of classifying as, and after the check digit of generation is longitudinally attached to this column data, obtain entangling and delete data after coding;

Described CRC encodes and comprises: data after entangling deletion coding are carried out respectively to CRC error detection coding with behavior unit, after the CRC check position of generation is attached to the row data, obtain the rear data of CRC coding;

Described parallel/serial conversion comprises: data after CRC coding are converted to serial data by parallel data.

5. transmit according to claim 1 the method for data, it is characterized in that, described decoding is processed and is comprised: serial/parallel conversion and CRC error detection.

6. transmit according to claim 5 the method for data, it is characterized in that, described serial/parallel conversion comprises: serial data be take to the length of CRC encoding block as Conversion of measurement unit is parallel data, obtain receiving piecemeal;

Described CRC error detection comprises: docking contracture Kuai Yi behavior unit carries out CRC error detection decoding according to CRC check position respectively, and removes CRC check position, obtains data after CRC error detection.

7. transmit according to claim 1 the method for data, it is characterized in that, described reduction misdata comprises: data after CRC error detection are carried out to delete correction decoding according to check digit respectively with the unit of classifying as, and remove check digit, obtain former data.

8. a system of transmitting data, is characterized in that, described system comprises transmitting terminal, relaying and receiving terminal,

Transmitting terminal, for processing that two groups of data are encoded respectively, sends the data after two group codings to relaying;

Relaying, for receiving the data after described two group codings, then carries out respectively decoding processing, wherein, records one group of data and occurs the capable mistake of A, and the capable mistake of B appears in another group data; If A and B are all less than default network code and select thresholding, reduce misdata, then distinguish after encoded processing and network code, to receiving terminal, send the data after network code; If A and B are not all less than default network code and select thresholding, directly forward two groups of data;

Receiving terminal, carries out decoding processing for the data that centering secondary is sent respectively, obtains former data.

9. transmit according to claim 8 the system of data, it is characterized in that, described transmitting terminal comprises that the serial/parallel converter unit of transmitting terminal, transmitting terminal entangle deletion coding unit, transmitting terminal error detection coding unit and the parallel/serial converter unit of transmitting terminal,

The serial/parallel converter unit of transmitting terminal, for data being divided into K piece, by K data block parallel arranged, obtains deblocking, and K entangles the information bit length deleting code;

Transmitting terminal entangles deletion coding unit, for deblocking is entangled respectively and deletes coding with the unit of classifying as, and after the check digit of generation is longitudinally attached to this column data, obtains entangling the rear data of deletion coding;

Transmitting terminal error detection coding unit, for data after entangling deletion coding are carried out respectively to CRC error detection coding with behavior unit, after the CRC check position of generation is attached to the row data, obtains the rear data of CRC coding;

The parallel/serial converter unit of transmitting terminal, for being converted to serial data by data after CRC coding by parallel data.

10. transmit according to claim 8 the system of data, it is characterized in that, described relaying comprises that the serial/parallel converter unit of relaying, relaying error detection decoding unit, relaying delete correction decoding unit, relaying entangle deletion coding unit, relaying error detection coding unit and the parallel/serial converter unit of relaying;

The serial/parallel converter unit of relaying, for serial data being take to the length of CRC encoding block as Conversion of measurement unit is parallel data, obtains receiving piecemeal;

Relaying error detection decoding unit, carries out CRC error detection decoding according to CRC check position respectively for docking contracture Kuai Yi behavior unit, and removes CRC check position, obtains data after CRC error detection; The error number that record data occur;

Relaying delete correction decoding unit, for data after CRC error detection are carried out to delete correction decoding according to check digit respectively with the unit of classifying as, obtains deblocking corresponding to former data;

Relaying entangles deletion coding unit, for deblocking is entangled respectively and deletes coding with the unit of classifying as, and after the check digit of generation is longitudinally attached to this column data, obtains entangling the rear data of deletion coding;

Relaying error detection coding unit, for data after entangling deletion coding are carried out respectively to CRC error detection coding with behavior unit, after the CRC check position of generation is attached to the row data, obtains the rear data of CRC coding;

The parallel/serial converter unit of relaying, for being converted to serial data by data after CRC coding by parallel data.

11. transmit the system of data according to claim 8, it is characterized in that, described receiving terminal comprises: the serial/parallel converter unit of receiving terminal, receiving terminal error detection decoding unit and the parallel/serial converter unit of receiving terminal;

The serial/parallel converter unit of receiving terminal, for serial data being take to the length of CRC encoding block as Conversion of measurement unit is parallel data, obtains receiving piecemeal;

Receiving terminal error detection decoding unit, carries out CRC error detection decoding according to CRC check position respectively for docking contracture Kuai Yi behavior unit, and removes CRC check position, obtains data after CRC error detection;

The parallel/serial converter unit of relaying, for being converted to serial data by data after CRC error detection by parallel data.

12. 1 kinds of transmitting terminals that transmit data, is characterized in that, described transmitting terminal, for processing that two groups of data are encoded respectively, sends the data after two group codings to relaying.

13. according to the transmitting terminal that transmits data described in claim 12, it is characterized in that, described transmitting terminal comprises that the serial/parallel converter unit of transmitting terminal, transmitting terminal entangle deletion coding unit, transmitting terminal error detection coding unit and the parallel/serial converter unit of transmitting terminal,

The serial/parallel converter unit of transmitting terminal, for data being divided into K piece, by K data block parallel arranged, obtains deblocking, and K entangles the information bit length deleting code;

Transmitting terminal entangles deletion coding unit, for deblocking is entangled respectively and deletes coding with the unit of classifying as, and after the check digit of generation is longitudinally attached to this column data, obtains entangling the rear data of deletion coding;

Transmitting terminal error detection coding unit, for data after entangling deletion coding are carried out respectively to CRC error detection coding with behavior unit, after the CRC check position of generation is attached to the row data, obtains the rear data of CRC coding;

The parallel/serial converter unit of transmitting terminal, for being converted to serial data to data after CRC coding by parallel data.

14. 1 kinds of relayings that transmit data, is characterized in that, described relaying for receiving the data after two group codings, then carries out decoding processing respectively, wherein, record one group of data and occur the capable mistake of A, and the capable mistake of B appears in another group data; If A and B are all less than default network code and select thresholding, reduce misdata, then distinguish after encoded processing and network code, to receiving terminal, send the data after network code; If A and B are not all less than default network code and select thresholding, directly forward two groups of data.

15. according to the relaying that transmits data described in claim 14, it is characterized in that, described relaying comprises that the serial/parallel converter unit of relaying, relaying error detection decoding unit, relaying delete correction decoding unit, relaying entangle deletion coding unit, relaying error detection coding unit and the parallel/serial converter unit of relaying;

The serial/parallel converter unit of relaying, for serial data being take to the length of CRC encoding block as Conversion of measurement unit is parallel data, obtains receiving piecemeal;

Relaying error detection decoding unit, carries out CRC error detection decoding according to CRC check position respectively for docking contracture Kuai Yi behavior unit, and removes CRC check position, obtains data after CRC error detection; Relaying delete correction decoding unit, for data after CRC error detection are carried out to delete correction decoding according to check digit respectively with the unit of classifying as, obtains deblocking corresponding to former data;

Relaying entangles deletion coding unit, for deblocking is entangled respectively and deletes coding with the unit of classifying as, and after the check digit of generation is longitudinally attached to this column data, obtains entangling the rear data of deletion coding;

Relaying error detection coding unit, for data after entangling deletion coding are carried out respectively to CRC error detection coding with behavior unit, after the CRC check position of generation is attached to the row data, obtains the rear data of CRC coding;

The parallel/serial converter unit of relaying, for being converted to serial data by data after CRC coding by parallel data.

16. 1 kinds of receiving terminals that transmit data, is characterized in that, described receiving terminal carries out decoding processing for the data that centering secondary is sent respectively, obtains former data.

17. according to the receiving terminal that transmits data described in claim 16, it is characterized in that, described receiving terminal comprises: the serial/parallel converter unit of receiving terminal, receiving terminal error detection decoding unit and the parallel/serial converter unit of receiving terminal;

The serial/parallel converter unit of receiving terminal, for serial data being take to the length of CRC encoding block as Conversion of measurement unit is parallel data, obtains receiving piecemeal;

Receiving terminal error detection decoding unit, carries out CRC error detection decoding according to CRC check position respectively for docking contracture Kuai Yi behavior unit, and removes CRC check position, obtains data after CRC error detection;

The parallel/serial converter unit of relaying, for being converted to serial data by data after CRC error detection by parallel data.